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Ivanova E, Hue-Beauvais C, Castille J, Laubier J, Le Guillou S, Aujean E, Lecardonnel J, Lebrun L, Jaffrezic F, Rousseau-Ralliard D, Péchoux C, Letheule M, Foucras G, Charlier M, Le Provost F. Mutation of SOCS2 induces structural and functional changes in mammary development. Development 2024; 151:dev202332. [PMID: 38391249 DOI: 10.1242/dev.202332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 02/15/2024] [Indexed: 02/24/2024]
Abstract
Lactation is an essential process for mammals. In sheep, the R96C mutation in suppressor of cytokine signaling 2 (SOCS2) protein is associated with greater milk production and increased mastitis sensitivity. To shed light on the involvement of R96C mutation in mammary gland development and lactation, we developed a mouse model carrying this mutation (SOCS2KI/KI). Mammary glands from virgin adult SOCS2KI/KI mice presented a branching defect and less epithelial tissue, which were not compensated for in later stages of mammary development. Mammary epithelial cell (MEC) subpopulations were modified, with mutated mice having three times as many basal cells, accompanied by a decrease in luminal cells. The SOCS2KI/KI mammary gland remained functional; however, MECs contained more lipid droplets versus fat globules, and milk lipid composition was modified. Moreover, the gene expression dynamic from virgin to pregnancy state resulted in the identification of about 3000 differentially expressed genes specific to SOCS2KI/KI or control mice. Our results show that SOCS2 is important for mammary gland development and milk production. In the long term, this finding raises the possibility of ensuring adequate milk production without compromising animal health and welfare.
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Affiliation(s)
- Elitsa Ivanova
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas 78350, France
| | - Cathy Hue-Beauvais
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas 78350, France
| | - Johan Castille
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas 78350, France
| | - Johann Laubier
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas 78350, France
| | - Sandrine Le Guillou
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas 78350, France
| | - Etienne Aujean
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas 78350, France
| | - Jerome Lecardonnel
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas 78350, France
| | - Laura Lebrun
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas 78350, France
| | - Florence Jaffrezic
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas 78350, France
| | - Delphine Rousseau-Ralliard
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas 78350, France
- Ecole Nationale Vétérinaire d'Alfort, BREED, Maisons-Alfort 94700, France
| | - Christine Péchoux
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas 78350, France
| | - Martine Letheule
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas 78350, France
- Ecole Nationale Vétérinaire d'Alfort, BREED, Maisons-Alfort 94700, France
| | - Gilles Foucras
- IHAP, Université de Toulouse, INRAE, ENVT, Toulouse 31076, France
| | - Madia Charlier
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas 78350, France
| | - Fabienne Le Provost
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas 78350, France
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Daniel-Carlier N, Castille J, Passet B, Vilotte M, Le Danvic C, Jaffrezic F, Beauvallet C, Péchoux C, Capitan A, Vilotte JL. Targeted mutation and inactivation of the kinesin light chain 3 protein-encoding gene have no impact on mouse fertility†. Biol Reprod 2024; 110:78-89. [PMID: 37776549 DOI: 10.1093/biolre/ioad131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/02/2023] Open
Abstract
The kinesin light chain 3 protein (KLC3) is the only member of the kinesin light chain protein family that was identified in post-meiotic mouse male germ cells. It plays a role in the formation of the sperm midpiece through its association with both spermatid mitochondria and outer dense fibers (ODF). Previous studies showed a significant correlation between its expression level and sperm motility and quantitative semen parameters in humans, while the overexpression of a KLC3-mutant protein unable to bind ODF also affected the same traits in mice. To further assess the role of KLC3 in fertility, we used CRISPR/Cas9 genome editing in mice and investigated the phenotypes induced by the invalidation of the gene or of a functional domain of the protein. Both approaches gave similar results, i.e. no detectable change in male or female fertility. Testis histology, litter size and sperm count were not altered. Apart from the line-dependent alterations of Klc3 mRNA levels, testicular transcriptome analysis did not reveal any other changes in the genes tested. Western analysis supported the absence of KLC3 in the gonads of males homozygous for the inactivating mutation and a strong decrease in expression in males homozygous for the allele lacking one out of the five tetratricopeptide repeats. Overall, these observations raise questions about the supposedly critical role of this kinesin in reproduction, at least in mice where its gene mutation or inactivation did not translate into fertility impairment.
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Affiliation(s)
- Nathalie Daniel-Carlier
- University of Paris-Saclay, INRAE, AgroParisTech, UMR1313 GABI, 78350, Jouy-en-Josas, France
| | - Johan Castille
- University of Paris-Saclay, INRAE, AgroParisTech, UMR1313 GABI, 78350, Jouy-en-Josas, France
| | - Bruno Passet
- University of Paris-Saclay, INRAE, AgroParisTech, UMR1313 GABI, 78350, Jouy-en-Josas, France
| | - Marthe Vilotte
- University of Paris-Saclay, INRAE, AgroParisTech, UMR1313 GABI, 78350, Jouy-en-Josas, France
| | - Christelle Le Danvic
- UVSQ, INRAE, BREED, Université Paris-Saclay, Eliance, 78350 Jouy-en-Josas, France
| | - Florence Jaffrezic
- University of Paris-Saclay, INRAE, AgroParisTech, UMR1313 GABI, 78350, Jouy-en-Josas, France
| | - Christian Beauvallet
- University of Paris-Saclay, INRAE, AgroParisTech, UMR1313 GABI, 78350, Jouy-en-Josas, France
| | - Christine Péchoux
- University of Paris-Saclay, INRAE, AgroParisTech, UMR1313 GABI, 78350, Jouy-en-Josas, France
| | - Aurélien Capitan
- University of Paris-Saclay, INRAE, AgroParisTech, UMR1313 GABI, 78350, Jouy-en-Josas, France
| | - Jean-Luc Vilotte
- University of Paris-Saclay, INRAE, AgroParisTech, UMR1313 GABI, 78350, Jouy-en-Josas, France
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Guérin H, Courtin P, Guillot A, Péchoux C, Mahony J, van Sinderen D, Kulakauskas S, Cambillau C, Touzé T, Chapot-Chartier MP. Molecular mechanisms underlying the structural diversity of rhamnose-rich cell wall polysaccharides in lactococci. J Biol Chem 2024; 300:105578. [PMID: 38110036 PMCID: PMC10821137 DOI: 10.1016/j.jbc.2023.105578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 12/04/2023] [Accepted: 12/11/2023] [Indexed: 12/20/2023] Open
Abstract
In Gram-positive bacteria, cell wall polysaccharides (CWPS) play critical roles in bacterial cell wall homeostasis and bacterial interactions with their immediate surroundings. In lactococci, CWPS consist of two components: a conserved rhamnan embedded in the peptidoglycan layer and a surface-exposed polysaccharide pellicle (PSP), which are linked together to form a large rhamnose-rich CWPS (Rha-CWPS). PSP, whose structure varies from strain to strain, is a receptor for many bacteriophages infecting lactococci. Here, we examined the first two steps of PSP biosynthesis, using in vitro enzymatic tests with lipid acceptor substrates combined with LC-MS analysis, AlfaFold2 modeling of protein 3D-structure, complementation experiments, and phage assays. We show that the PSP repeat unit is assembled on an undecaprenyl-monophosphate (C55P) lipid intermediate. Synthesis is initiated by the WpsA/WpsB complex with GlcNAc-P-C55 synthase activity and the PSP precursor GlcNAc-P-C55 is then elongated by specific glycosyltransferases that vary among lactococcal strains, resulting in PSPs with diverse structures. Also, we engineered the PSP biosynthesis pathway in lactococci to obtain a chimeric PSP structure, confirming the predicted glycosyltransferase specificities. This enabled us to highlight the importance of a single sugar residue of the PSP repeat unit in phage recognition. In conclusion, our results support a novel pathway for PSP biosynthesis on a lipid-monophosphate intermediate as an extracellular modification of rhamnan, unveiling an assembly machinery for complex Rha-CWPS with structural diversity in lactococci.
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Affiliation(s)
- Hugo Guérin
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Pascal Courtin
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Alain Guillot
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Christine Péchoux
- Université Paris-Saclay INRAE, AgroParisTech, GABI, Jouy-en-Josas, France
| | - Jennifer Mahony
- School of Microbiology and APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Douwe van Sinderen
- School of Microbiology and APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Saulius Kulakauskas
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Christian Cambillau
- School of Microbiology and APC Microbiome Ireland, University College Cork, Cork, Ireland; Laboratoire d'Ingénierie des Systèmes Macromoléculaires (LISM), Institut de Microbiologie, Bioénergies et Biotechnologie (IMM), Aix-Marseille Université - CNRS, UMR 7255, Marseille, France
| | - Thierry Touzé
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Gif-sur-Yvette, France
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Krupova Z, Leroux C, Péchoux C, Bevilacqua C, Martin P. Comparison of goat and cow milk-derived extracellular vesicle miRNomes. Sci Data 2023; 10:465. [PMID: 37468505 PMCID: PMC10356914 DOI: 10.1038/s41597-023-02347-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 06/29/2023] [Indexed: 07/21/2023] Open
Abstract
miRNAs present in milk are mainly found in extracellular vesicles (EVs), which are nanosized membrane vesicles released by most of the cell types to ensure intercellular communication. The majority of the studies performed so far on these vesicles have been conducted on human and cow's milk and focused on their miRNA content. The objectives of this study were to profile the miRNA content of purified EVs from five healthy goats and to compare their miRNome to those obtained from five healthy cows, at an early stage of lactation. EV populations were morphologically characterized using Transmission Electron Microscopy and Nanoparticle Tracking Analysis. The presence of EV protein markers checked by Western blotting and the absence of contamination of preparations by milk proteins. The size distribution and concentration of bovine and goat milk-derived EVs were similar. RNA-sequencing were performed, and all sequences were mapped to the cow genome identifying a total of 295 miRNAs. This study reports for the first-time a goat miRNome from milk EVs and its validation using cow miRNomes.
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Affiliation(s)
- Zuzana Krupova
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, F-78350, Jouy-en-Josas, France
| | - Christine Leroux
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, F-63122, Saint-Genès-Champanelle, France.
- Department of Food Science and Technology, University of California Davis, Davis, CA, USA.
| | - Christine Péchoux
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, F-78350, Jouy-en-Josas, France
| | - Claudia Bevilacqua
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, F-78350, Jouy-en-Josas, France
| | - Patrice Martin
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, F-78350, Jouy-en-Josas, France
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Rizzotto F, Marin M, Péchoux C, Auger S, Vidic J. Colorimetric aptasensor for detection of Bacillus cytotoxicus spores in milk and ready-to-use food. Heliyon 2023; 9:e17562. [PMID: 37449120 PMCID: PMC10336431 DOI: 10.1016/j.heliyon.2023.e17562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 05/09/2023] [Accepted: 06/21/2023] [Indexed: 07/18/2023] Open
Abstract
The high incidence of foodborne diseases caused by pathogenic bacteria raises concerns worldwide and imposes considerable public healthcare challenges. This is especially observed with dormant spores of Bacilli, which can often survive treatments used by the food industry to kill growing bacteria. The early and rapid detection of bacterial spores is essential to ensure food safety. Commercial availability of such a test will present a high potential for food sector. We present a point-of-need colorimetric assay for detection of Bacillus cytotoxicus spores in food. The detection principle is based on spore-enhanced peroxidase-like catalytic activity of gold nanoparticles. The sensing platform consists of a microtube containing gold nanoparticles (AuNPs), and magnetic particles (MPs), both conjugated with specific aptamer BAS6R that recognize B. cytotoxicus spores. Upon the addition of the sample, spores were determined as present by the enhanced color change of the solution, due to the oxidation of tetramethylbenidine (TMB) with H2O2. The assay was evaluated by the naked eye (on/off) and quantitatively with use of a spectrophotometer. BAS6R@AuNPs aptasensor coupled to BAS6R@MPs proved to be highly sensitive, achieving the naked-eye limit of detection as low as 102 cfu/mL in water and milk, and 104 cfu/mL in mashed potatoes. Moreover, discrimination between spores of B. cytotoxicus and B. subtilis as well as bacterial vegetative cells was achieved in contaminated food samples, providing a good selectivity. This work provides a promising proof of concept for the development of instrument-free, low-cost and rapid assay for Bacillus cytotoxicus spore detection, which is able to compete in sensitivity with conventional costly and time-consuming laboratory analyses.
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Affiliation(s)
- Francesco Rizzotto
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350 Jouy en Josas, France
| | - Marco Marin
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350 Jouy en Josas, France
| | - Christine Péchoux
- INRAE, AgroParisTech, Université Paris-Saclay, GABI, 78350 Jouy-en-Josas, France
| | - Sandrine Auger
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350 Jouy en Josas, France
| | - Jasmina Vidic
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350 Jouy en Josas, France
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Guérin H, Quénée P, Palussière S, Courtin P, André G, Péchoux C, Costache V, Mahony J, van Sinderen D, Kulakauskas S, Chapot-Chartier MP. PBP2b Mutations Improve the Growth of Phage-Resistant Lactococcus cremoris Lacking Polysaccharide Pellicle. Appl Environ Microbiol 2023; 89:e0210322. [PMID: 37222606 PMCID: PMC10304956 DOI: 10.1128/aem.02103-22] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 05/01/2023] [Indexed: 05/25/2023] Open
Abstract
Lactococcus lactis and Lactococcus cremoris are Gram-positive lactic acid bacteria widely used as starter in milk fermentations. Lactococcal cells are covered with a polysaccharide pellicle (PSP) that was previously shown to act as the receptor for numerous bacteriophages of the Caudoviricetes class. Thus, mutant strains lacking PSP are phage resistant. However, because PSP is a key cell wall component, PSP-negative mutants exhibit dramatic alterations of cell shape and severe growth defects, which limit their technological value. In the present study, we isolated spontaneous mutants with improved growth, from L. cremoris PSP-negative mutants. These mutants grow at rates similar to the wild-type strain, and based on transmission electron microscopy analysis, they exhibit improved cell morphology compared to their parental PSP-negative mutants. In addition, the selected mutants maintain their phage resistance. Whole-genome sequencing of several such mutants showed that they carried a mutation in pbp2b, a gene encoding a penicillin-binding protein involved in peptidoglycan biosynthesis. Our results indicate that lowering or turning off PBP2b activity suppresses the requirement for PSP and ameliorates substantially bacterial fitness and morphology. IMPORTANCE Lactococcus lactis and Lactococcus cremoris are widely used in the dairy industry as a starter culture. As such, they are consistently challenged by bacteriophage infections which may result in reduced or failed milk acidification with associated economic losses. Bacteriophage infection starts with the recognition of a receptor at the cell surface, which was shown to be a cell wall polysaccharide (the polysaccharide pellicle [PSP]) for the majority of lactococcal phages. Lactococcal mutants devoid of PSP exhibit phage resistance but also reduced fitness, since their morphology and division are severely impaired. Here, we isolated spontaneous, food-grade non-PSP-producing L. cremoris mutants resistant to bacteriophage infection with a restored fitness. This study provides an approach to isolate non-GMO phage-resistant L. cremoris and L. lactis strains, which can be applied to strains with technological functionalities. Also, our results highlight for the first time the link between peptidoglycan and cell wall polysaccharide biosynthesis.
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Affiliation(s)
- Hugo Guérin
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Pascal Quénée
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Simon Palussière
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Pascal Courtin
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Gwenaëlle André
- Université Paris-Saclay, INRAE, MaIAGE, Jouy-en-Josas, France
| | - Christine Péchoux
- Université Paris-Saclay, INRAE, GABI, Jouy-en-Josas, France
- MIMA2 Imaging Core Facility, Microscopie et Imagerie des Microorganismes, Animaux et Aliments, INRAE, Jouy-en-Josas, France
| | - Vlad Costache
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
- MIMA2 Imaging Core Facility, Microscopie et Imagerie des Microorganismes, Animaux et Aliments, INRAE, Jouy-en-Josas, France
| | - Jennifer Mahony
- School of Microbiology and APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Douwe van Sinderen
- School of Microbiology and APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Saulius Kulakauskas
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
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Fromain A, Van de Walle A, Curé G, Péchoux C, Serrano A, Lalatonne Y, Espinosa A, Wilhelm C. Biomineralization of magnetic nanoparticles in stem cells. Nanoscale 2023. [PMID: 37249390 DOI: 10.1039/d3nr00863k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Iron is one of the most common metals in the human body, with an intrinsic metabolism including proteins involved in its transport, storage, and redox mechanisms. A less explored singularity is the presence of magnetic iron in the organism, especially in the brain. The capacity of human stem cells to biosynthesize magnetic nanoparticles was recently demonstrated, using iron released by the degradation of synthetic magnetic nanoparticles. To evidence a magnetic biomineralization in mammalian cells, it is required to address the biosynthesis of magnetic nanoparticles in cells supplied exclusively with non-magnetic iron salt precursors. Herein, mouse and human mesenchymal stem cells were incubated with ferric quinate for up to 36 days. By optimizing the concentration and culture time, and by measuring both total intracellular iron content and cellular magnetic signals, the biosynthesis of magnetic nanoparticles was found to occur from 14 days of continuous iron incubation and was correlated with important doses of intracellular iron. The local electronic structure and chemical environment of intracellular iron were further characterized by XAS spectroscopy at the Fe K-edge, showing a total conversion of Fe2+ to Fe3+ when using ferrous salts (ascorbate and sulfate), and a transformation towards ferrihydrite as well as a small proportion of a magnetic phase.
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Affiliation(s)
- Alexandre Fromain
- Laboratoire Physico Chimie Curie, CNRS UMR168, Institut Curie, Sorbonne Université, PSL University, 75005 Paris, France.
| | - Aurore Van de Walle
- Laboratoire Physico Chimie Curie, CNRS UMR168, Institut Curie, Sorbonne Université, PSL University, 75005 Paris, France.
| | - Guilhem Curé
- Laboratoire Physico Chimie Curie, CNRS UMR168, Institut Curie, Sorbonne Université, PSL University, 75005 Paris, France.
| | - Christine Péchoux
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, 78350, Jouy-en-Josas, France
| | - Aida Serrano
- Departamento de Electrocerámica, Instituto de Cerámica y Vidrio, ICV-CSIC, C/Kelsen 5, 28049 Madrid, Spain
| | - Yoann Lalatonne
- Université Sorbonne Paris Nord, Université Paris Cité, Laboratory for Vascular Translational Science, LVTS, INSERM, UMR 1148, Bobigny F-93017, France
- Département de Biophysique et de Médecine Nucléaire, Assistance Publique-Hôpitaux de Paris, Hôpital Avicenne, F-93009 Bobigny, France
| | - Ana Espinosa
- IMDEA Nanociencia, C/Faraday 9, 28049 Madrid, Spain
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, calle Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Claire Wilhelm
- Laboratoire Physico Chimie Curie, CNRS UMR168, Institut Curie, Sorbonne Université, PSL University, 75005 Paris, France.
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8
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Zhao H, Sene S, Mielcarek AM, Miraux S, Menguy N, Ihiawakrim D, Ersen O, Péchoux C, Guillou N, Scola J, Grenèche JM, Nouar F, Mura S, Carn F, Gazeau F, Dumas E, Serre C, Steunou N. Hierarchical superparamagnetic metal-organic framework nanovectors as anti-inflammatory nanomedicines. J Mater Chem B 2023; 11:3195-3211. [PMID: 36951043 DOI: 10.1039/d2tb02094g] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
Among a plethora of drug nanocarriers, biocompatible nanoscale metal-organic frameworks (nanoMOFs) with a large surface area and an amphiphilic internal microenvironment have emerged as promising drug delivery platforms, mainly for cancer therapy. However, their application in biomedicine still suffers from shortcomings such as a limited chemical and/or colloidal stability and/or toxicity. Here, we report the design of a hierarchically porous nano-object (denoted as USPIO@MIL) combining a benchmark nanoMOF (that is, MIL-100(Fe)) and ultra-small superparamagnetic iron oxide (USPIO) nanoparticles (that is, maghemite) that is synthesized through a one-pot, cost-effective and environmentally friendly protocol. The synergistic coupling of the physico-chemical and functional properties of both nanoparticles confers to these nano-objects valuable features such as high colloidal stability, high biodegradability, low toxicity, high drug loading capacity as well as stimuli-responsive drug release and superparamagnetic properties. This bimodal MIL-100(Fe)/maghemite nanocarrier once loaded with anti-tumoral and anti-inflammatory drugs (doxorubicin and methotrexate) shows high anti-inflammatory and anti-tumoral activities. In addition, the USPIO@MIL nano-object exhibits excellent relaxometric properties and its applicability as an efficient contrast agent for magnetic resonance imaging is herein demonstrated. This highlights the high potential of the maghemite@MOF composite integrating the functions of imaging and therapy as a theranostic anti-inflammatory formulation.
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Affiliation(s)
- Heng Zhao
- Institut des Matériaux Poreux de Paris, ENS, ESPCI Paris, CNRS, PSL university, Paris, France.
| | - Saad Sene
- Institut Lavoisier de Versailles, UMR CNRS 8180, Université de Versailles St Quentin en Yvelines, Université Paris Saclay, Versailles, France
| | - Angelika M Mielcarek
- Institut des Matériaux Poreux de Paris, ENS, ESPCI Paris, CNRS, PSL university, Paris, France.
| | - Sylvain Miraux
- Centre de Resonance Magnétique des Systèmes Biologiques, UMR5536, CNRS/Univ. Bordeaux, 33076 Bordeaux, France
| | - Nicolas Menguy
- Sorbonne Université, UMR CNRS 7590, MNHN, IRD, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, IMPMC, 75005 Paris, France
| | - Dris Ihiawakrim
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) UMR 7504 CNRS - Université de Strasbourg, 23 rue du Loess, 67034 Strasbourg Cedex 2, France
| | - Ovidiu Ersen
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) UMR 7504 CNRS - Université de Strasbourg, 23 rue du Loess, 67034 Strasbourg Cedex 2, France
| | - Christine Péchoux
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, 78350, Jouy-en-Josas, France
| | - Nathalie Guillou
- Institut Lavoisier de Versailles, UMR CNRS 8180, Université de Versailles St Quentin en Yvelines, Université Paris Saclay, Versailles, France
| | - Joseph Scola
- Groupe d'Etudes de la Matière Condensée, UMR CNRS 8635, Université de Versailles St Quentin en Yvelines, Université Paris Saclay, 78035 Versailles, France
| | - Jean-Marc Grenèche
- Institut des Molécules et des Matériaux du Mans, UMR CNRS 6283, Université du Maine, 72085 Le Mans, France
| | - Farid Nouar
- Institut des Matériaux Poreux de Paris, ENS, ESPCI Paris, CNRS, PSL university, Paris, France.
| | - Simona Mura
- Institut Galien Paris-Saclay, UMR 8612, CNRS, Université Paris-Saclay, Faculte de Pharmacie, 5 rue Jean-Baptiste Clément, F92296 Chatenay-Malabry cedex, France
| | - Florent Carn
- Laboratoire Matière et Systèmes Complexes (MSC), UMR CNRS 7057, Université de Paris, 75013 Paris, France
| | - Florence Gazeau
- Laboratoire Matière et Systèmes Complexes (MSC), UMR CNRS 7057, Université de Paris, 75013 Paris, France
| | - Eddy Dumas
- Institut Lavoisier de Versailles, UMR CNRS 8180, Université de Versailles St Quentin en Yvelines, Université Paris Saclay, Versailles, France
| | - Christian Serre
- Institut des Matériaux Poreux de Paris, ENS, ESPCI Paris, CNRS, PSL university, Paris, France.
| | - Nathalie Steunou
- Institut des Matériaux Poreux de Paris, ENS, ESPCI Paris, CNRS, PSL university, Paris, France.
- Institut Lavoisier de Versailles, UMR CNRS 8180, Université de Versailles St Quentin en Yvelines, Université Paris Saclay, Versailles, France
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9
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Khadhraoui N, Prola A, Vandestienne A, Blondelle J, Guillaud L, Courtin G, Bodak M, Prost B, Huet H, Wintrebert M, Péchoux C, Solgadi A, Relaix F, Tiret L, Pilot-Storck F. Hacd2 deficiency in mice leads to an early and lethal mitochondrial disease. Mol Metab 2023; 69:101677. [PMID: 36693621 PMCID: PMC9986742 DOI: 10.1016/j.molmet.2023.101677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 01/13/2023] [Accepted: 01/13/2023] [Indexed: 01/22/2023] Open
Abstract
OBJECTIVE Mitochondria fuel most animal cells with ATP, ensuring proper energetic metabolism of organs. Early and extensive mitochondrial dysfunction often leads to severe disorders through multiorgan failure. Hacd2 gene encodes an enzyme involved in very long chain fatty acid (C ≥ 18) synthesis, yet its roles in vivo remain poorly understood. Since mitochondria function relies on specific properties of their membranes conferred by a particular phospholipid composition, we investigated if Hacd2 gene participates to mitochondrial integrity. METHODS We generated two mouse models, the first one leading to a partial knockdown of Hacd2 expression and the second one, to a complete knockout of Hacd2 expression. We performed an in-depth analysis of the associated phenotypes, from whole organism to molecular scale. RESULTS Thanks to these models, we show that Hacd2 displays an early and broad expression, and that its deficiency in mice is lethal. Specifically, partial knockdown of Hacd2 expression leads to death within one to four weeks after birth, from a sudden growth arrest followed by cachexia and lethargy. The total knockout of Hacd2 is even more severe, characterized by embryonic lethality around E9.5 following developmental arrest and pronounced cardiovascular malformations. In-depth mechanistic analysis revealed that Hacd2 deficiency causes altered mitochondrial efficiency and ultrastructure, as well as accumulation of oxidized cardiolipin. CONCLUSIONS Altogether, these data indicate that the Hacd2 gene is essential for energetic metabolism during embryonic and postnatal development, acting through the control of proper mitochondrial organization and function.
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Affiliation(s)
- Nahed Khadhraoui
- Univ Paris-Est Créteil, INSERM, IMRB, Team Relaix, F-94010 Créteil, France; EnvA, IMRB, F-94700 Maisons-Alfort, France; EFS, IMRB, F-94010 Créteil, France
| | - Alexandre Prola
- Univ Paris-Est Créteil, INSERM, IMRB, Team Relaix, F-94010 Créteil, France; EnvA, IMRB, F-94700 Maisons-Alfort, France; EFS, IMRB, F-94010 Créteil, France
| | - Aymeline Vandestienne
- Univ Paris-Est Créteil, INSERM, IMRB, Team Relaix, F-94010 Créteil, France; EnvA, IMRB, F-94700 Maisons-Alfort, France; EFS, IMRB, F-94010 Créteil, France
| | - Jordan Blondelle
- Univ Paris-Est Créteil, INSERM, IMRB, Team Relaix, F-94010 Créteil, France; EnvA, IMRB, F-94700 Maisons-Alfort, France; EFS, IMRB, F-94010 Créteil, France
| | - Laurent Guillaud
- Univ Paris-Est Créteil, INSERM, IMRB, Team Relaix, F-94010 Créteil, France; EnvA, IMRB, F-94700 Maisons-Alfort, France; EFS, IMRB, F-94010 Créteil, France
| | - Guillaume Courtin
- Univ Paris-Est Créteil, INSERM, IMRB, Team Relaix, F-94010 Créteil, France; EnvA, IMRB, F-94700 Maisons-Alfort, France; EFS, IMRB, F-94010 Créteil, France
| | - Maxime Bodak
- Univ Paris-Est Créteil, INSERM, IMRB, Team Relaix, F-94010 Créteil, France; EnvA, IMRB, F-94700 Maisons-Alfort, France; EFS, IMRB, F-94010 Créteil, France
| | - Bastien Prost
- UMS IPSIT, Université Paris-Saclay, Châtenay-Malabry, F-92296, France
| | - Hélène Huet
- Biopôle, École nationale vétérinaire d'Alfort, Maisons-Alfort, F-94700, France
| | - Mélody Wintrebert
- Univ Paris-Est Créteil, INSERM, IMRB, Team Relaix, F-94010 Créteil, France; EnvA, IMRB, F-94700 Maisons-Alfort, France; EFS, IMRB, F-94010 Créteil, France
| | - Christine Péchoux
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, F-78350, Jouy-en-Josas, France
| | - Audrey Solgadi
- UMS IPSIT, Université Paris-Saclay, Châtenay-Malabry, F-92296, France
| | - Frédéric Relaix
- Univ Paris-Est Créteil, INSERM, IMRB, Team Relaix, F-94010 Créteil, France; EnvA, IMRB, F-94700 Maisons-Alfort, France; EFS, IMRB, F-94010 Créteil, France
| | - Laurent Tiret
- Univ Paris-Est Créteil, INSERM, IMRB, Team Relaix, F-94010 Créteil, France; EnvA, IMRB, F-94700 Maisons-Alfort, France; EFS, IMRB, F-94010 Créteil, France.
| | - Fanny Pilot-Storck
- Univ Paris-Est Créteil, INSERM, IMRB, Team Relaix, F-94010 Créteil, France; EnvA, IMRB, F-94700 Maisons-Alfort, France; EFS, IMRB, F-94010 Créteil, France.
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10
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Marin M, Rizzotto F, Léguillier V, Péchoux C, Borezee-Durant E, Vidic J. Naked-eye detection of Staphylococcus aureus in powdered milk and infant formula using gold nanoparticles. J Microbiol Methods 2022; 201:106578. [PMID: 36108985 DOI: 10.1016/j.mimet.2022.106578] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 09/07/2022] [Accepted: 09/07/2022] [Indexed: 12/27/2022]
Abstract
Nonspecific binding of proteins from complex food matrices is a significant challenge associated with a biosensor using gold nanoparticles (AuNPs). To overcome this, we developed an efficient EDTA chelating treatment to denature milk proteins and prevent their adsorption on AuNPs. The use of EDTA to solubilize proteins enabled a sensitive label-free apta-sensor platform for colorimetric detection of Staphylococcus aureus in milk and infant formula. In the assay, S. aureus depleted aptamers from the test solution, and the reduction of aptamers enabled aggregation of AuNPs upon salt addition, a process characterized by a color change from red to purple. Under optimized conditions, S. aureus could be visually detected within 30 min with the detection limit of 7.5 × 104 CFU/mL and 8.4 × 104 CFU/mL in milk and infant formula, respectively. The EDTA treatment provides new opportunities for monitoring milk contamination and may prove valuable for biosensor point-of-need applications.
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Affiliation(s)
- Marco Marin
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350 Jouy-en-Josas, France
| | - Francesco Rizzotto
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350 Jouy-en-Josas, France
| | - Vincent Léguillier
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350 Jouy-en-Josas, France
| | | | - Elise Borezee-Durant
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350 Jouy-en-Josas, France
| | - Jasmina Vidic
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350 Jouy-en-Josas, France.
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11
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Floriot S, Bellutti L, Castille J, Moison P, Messiaen S, Passet B, Boulanger L, Boukadiri A, Tourpin S, Beauvallet C, Vilotte M, Riviere J, Péchoux C, Bertaud M, Vilotte JL, Livera G. CEP250 is Required for Maintaining Centrosome Cohesion in the Germline and Fertility in Male Mice. Front Cell Dev Biol 2022; 9:754054. [PMID: 35127699 PMCID: PMC8809461 DOI: 10.3389/fcell.2021.754054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 12/24/2021] [Indexed: 12/02/2022] Open
Abstract
Male gametogenesis involves both mitotic divisions to amplify germ cell progenitors that gradually differentiate and meiotic divisions. Centrosomal regulation is essential for both types of divisions, with centrioles remaining tightly paired during the interphase. Here, we generated and characterized the phenotype of mutant mice devoid of Cep250/C-Nap1, a gene encoding for a docking protein for fibers linking centrioles, and characterized their phenotype. The Cep250-/- mice presented with no major defects, apart from male infertility due to a reduction in the spermatogonial pool and the meiotic blockade. Spermatogonial stem cells expressing Zbtb16 were not affected, whereas the differentiating spermatogonia were vastly lost. These cells displayed abnormal γH2AX-staining, accompanied by an increase in the apoptotic rate. The few germ cells that survived at this stage, entered the meiotic prophase I and were arrested at a pachytene-like stage, likely due to synapsis defects and the unrepaired DNA double-strand breaks. In these cells, centrosomes split up precociously, with γ-tubulin foci being separated whereas these were closely associated in wild-type cells. Interestingly, this lack of cohesion was also observed in wild-type female meiocytes, likely explaining the normal fertility of Cep250-/- female mice. Taken together, this study proposes a specific requirement of centrosome cohesion in the male germline, with a crucial role of CEP250 in both differentiating spermatogonia and meiotic spermatocytes.
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Affiliation(s)
- Sandrine Floriot
- INRAe, AgroParisTech, Université Paris-Saclay, GABI, Jouy-en-Josas, France
| | - Laura Bellutti
- Laboratory of Development of the Gonads, UMRE008 Genetic Stability Stem Cells and Radiations, IRCM/IBFJ CEA, Université de Paris, Université Paris-Saclay, Paris, France
- *Correspondence: Laura Bellutti, ; Gabriel Livera,
| | - Johan Castille
- INRAe, AgroParisTech, Université Paris-Saclay, GABI, Jouy-en-Josas, France
| | - Pauline Moison
- Laboratory of Development of the Gonads, UMRE008 Genetic Stability Stem Cells and Radiations, IRCM/IBFJ CEA, Université de Paris, Université Paris-Saclay, Paris, France
| | - Sébastien Messiaen
- Laboratory of Development of the Gonads, UMRE008 Genetic Stability Stem Cells and Radiations, IRCM/IBFJ CEA, Université de Paris, Université Paris-Saclay, Paris, France
| | - Bruno Passet
- INRAe, AgroParisTech, Université Paris-Saclay, GABI, Jouy-en-Josas, France
| | - Laurent Boulanger
- INRAe, AgroParisTech, Université Paris-Saclay, GABI, Jouy-en-Josas, France
| | - Abdelhak Boukadiri
- INRAe, AgroParisTech, Université Paris-Saclay, GABI, Jouy-en-Josas, France
| | - Sophie Tourpin
- Laboratory of Development of the Gonads, UMRE008 Genetic Stability Stem Cells and Radiations, IRCM/IBFJ CEA, Université de Paris, Université Paris-Saclay, Paris, France
| | | | - Marthe Vilotte
- INRAe, AgroParisTech, Université Paris-Saclay, GABI, Jouy-en-Josas, France
| | - Julie Riviere
- INRAe, AgroParisTech, Université Paris-Saclay, GABI, Jouy-en-Josas, France
| | - Christine Péchoux
- INRAe, AgroParisTech, Université Paris-Saclay, GABI, Jouy-en-Josas, France
| | - Maud Bertaud
- INRAe, AgroParisTech, Université Paris-Saclay, GABI, Jouy-en-Josas, France
| | - Jean-Luc Vilotte
- INRAe, AgroParisTech, Université Paris-Saclay, GABI, Jouy-en-Josas, France
| | - Gabriel Livera
- Laboratory of Development of the Gonads, UMRE008 Genetic Stability Stem Cells and Radiations, IRCM/IBFJ CEA, Université de Paris, Université Paris-Saclay, Paris, France
- *Correspondence: Laura Bellutti, ; Gabriel Livera,
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12
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Curcio A, Van de Walle A, Péchoux C, Abou-Hassan A, Wilhelm C. In Vivo Assimilation of CuS, Iron Oxide and Iron Oxide@CuS Nanoparticles in Mice: A 6-Month Follow-Up Study. Pharmaceutics 2022; 14:179. [PMID: 35057074 PMCID: PMC8780448 DOI: 10.3390/pharmaceutics14010179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/05/2022] [Accepted: 01/11/2022] [Indexed: 11/19/2022] Open
Abstract
Nanoparticles (NPs) are at the leading edge of nanomedicine, and determining their biosafety remains a mandatory precondition for biomedical applications. Herein, we explore the bioassimilation of copper sulfide NPs reported as powerful photo-responsive anticancer therapeutic agents. The nanoparticles investigated present a hollow shell morphology, that can be left empty (CuS NPs) or be filled with an iron oxide flower-like core (iron oxide@CuS NPs), and are compared with the iron oxide nanoparticles only (iron oxide NPs). CuS, iron oxide@CuS and iron oxide NPs were injected in 6-week-old mice, at doses coherent with an antitumoral treatment. Cu and Fe were quantified in the liver, spleen, kidneys, and lungs over 6 months, including the control animals, thus providing endogenous Cu and Fe levels in the first months after animal birth. After intravenous NPs administration, 77.0 ± 3.9% of the mass of Cu injected, and 78.6 ± 3.8% of the mass of Fe, were detected in the liver. In the spleen, we found 3.3 ± 0.6% of the injected Cu and 3.8 ± 0.6% for the Fe. No negative impact was observed on organ weight, nor on Cu or Fe homeostasis in the long term. The mass of the two metals returned to the control values within three months, a result that was confirmed by transmission electron microscopy and histology images. This bioassimilation with no negative impact comforts the possible translation of these nanomaterials into clinical practice.
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Affiliation(s)
- Alberto Curcio
- Laboratoire Physico Chimie Curie, Institut Curie, CNRS, PSL Research University, 75005 Paris, France; (A.C.); (A.V.d.W.)
- Laboratoire Matière et Systèmes Complexes (MSC), UMR 7057, CNRS, University of Paris, 75205 Paris, France
| | - Aurore Van de Walle
- Laboratoire Physico Chimie Curie, Institut Curie, CNRS, PSL Research University, 75005 Paris, France; (A.C.); (A.V.d.W.)
- Laboratoire Matière et Systèmes Complexes (MSC), UMR 7057, CNRS, University of Paris, 75205 Paris, France
| | - Christine Péchoux
- INRAE, UMR 1313 GABI, MIMA2-Plateau de Microscopie Electronique, 78352 Jouy-en-Josas, France;
| | - Ali Abou-Hassan
- PHysico-Chimie des Electrolytes et Nanosystèmes InterfaciauX, PHENIX, CNRS, Sorbonne Université, 75005 Paris, France;
| | - Claire Wilhelm
- Laboratoire Physico Chimie Curie, Institut Curie, CNRS, PSL Research University, 75005 Paris, France; (A.C.); (A.V.d.W.)
- Laboratoire Matière et Systèmes Complexes (MSC), UMR 7057, CNRS, University of Paris, 75205 Paris, France
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13
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Lu J, Le Hir R, Gómez-Páez DM, Coen O, Péchoux C, Jasinski S, Magnani E. The nucellus: between cell elimination and sugar transport. Plant Physiol 2021; 185:478-490. [PMID: 33721907 PMCID: PMC8133628 DOI: 10.1093/plphys/kiaa045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 11/10/2020] [Indexed: 05/29/2023]
Abstract
The architecture of the seed is shaped by the processes of tissue partitioning, which determines the volume ratio of maternal and zygotic tissues, and nutrient partitioning, which regulates nutrient distribution among tissues. In angiosperms, early seed development is characterized by antagonistic development of the nucellus maternal tissue and the endosperm fertilization product to become the main sugar sink. This process marked the evolution of angiosperms and outlines the most ancient seed architectures. In Arabidopsis, the endosperm partially eliminates the nucellus and imports sugars from the seed coat. Here, we show that the nucellus is symplasmically connected to the chalaza, the seed nutrient unloading zone, and works as both a sugar sink and source alongside the seed coat. After fertilization, the transient nucellus accumulates starch early on and releases it in the apoplasmic space during its elimination. By contrast, the persistent nucellus exports sugars toward the endosperm through the SWEET4 hexose facilitator. Finally, we analyzed sugar metabolism and transport in the transparent testa 16 mutant, which fails to undergo nucellus cell elimination, which shed light on the coordination between tissue and nutrient partitioning. Overall, this study identifies a path of sugar transport in the Arabidopsis seed and describes a link between sugar redistribution and the nucellus cell-elimination program.
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Affiliation(s)
- Jing Lu
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, CNRS, University of Paris-Saclay, Route de St-Cyr (RD10), 78026 Versailles Cedex, France
- École Doctorale 567 Sciences du Végétal, University Paris-Sud, University of Paris-Saclay, bat 360, 91405 Orsay Cedex, France
| | - Rozenn Le Hir
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, CNRS, University of Paris-Saclay, Route de St-Cyr (RD10), 78026 Versailles Cedex, France
| | - Dennys-Marcela Gómez-Páez
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, CNRS, University of Paris-Saclay, Route de St-Cyr (RD10), 78026 Versailles Cedex, France
| | - Olivier Coen
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, CNRS, University of Paris-Saclay, Route de St-Cyr (RD10), 78026 Versailles Cedex, France
- École Doctorale 567 Sciences du Végétal, University Paris-Sud, University of Paris-Saclay, bat 360, 91405 Orsay Cedex, France
| | - Christine Péchoux
- INRAE, Génétique Animale et Biologie Intégrative, Domaine de Vilvert, 78352 Jouy-en-Josas Cedex, France
| | - Sophie Jasinski
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, CNRS, University of Paris-Saclay, Route de St-Cyr (RD10), 78026 Versailles Cedex, France
| | - Enrico Magnani
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, CNRS, University of Paris-Saclay, Route de St-Cyr (RD10), 78026 Versailles Cedex, France
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14
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Li X, Porcino M, Martineau-Corcos C, Guo T, Xiong T, Zhu W, Patriarche G, Péchoux C, Perronne B, Hassan A, Kümmerle R, Michelet A, Zehnacker-Rentien A, Zhang J, Gref R. Efficient incorporation and protection of lansoprazole in cyclodextrin metal-organic frameworks. Int J Pharm 2020; 585:119442. [PMID: 32445910 DOI: 10.1016/j.ijpharm.2020.119442] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 05/14/2020] [Accepted: 05/15/2020] [Indexed: 01/01/2023]
Abstract
Lansoprazole (LPZ) is an acid pump inhibitor, which readily degrades upon acidic or basic conditions and under heating. We investigated here LPZ stability upon incorporation in particles made of cyclodextrin metal-organic frameworks (CD-MOFs). LPZ loaded CD-MOFs were successfully synthesized, reaching high LPZ payloads of 23.2 ± 2.1 wt%, which correspond to a molar ratio of 1:1 between LPZ and γ-CD. The homogeneity of LPZ loaded CD-MOFs in terms of component distribution was confirmed by elemental mapping by STEM-EDX. Both CTAB, the surfactant used in the CD-MOFs synthesis, and LPZ compete for their inclusion in the CD cavities. CTAB allowed obtaining regular cubic particles of around 5 µm with 15 wt% residual CTAB amounts. When LPZ was incorporated, the residual CTAB amount was less than 0.1 wt%, suggesting a higher affinity of LPZ for the CDs than CTAB. These findings were confirmed by molecular simulations. Vibrational circular dichroism studies confirmed the LPZ incorporation inside the CDs. Solid-state NMR showed that LPZ was located in the CDs and that it remained intact even after three years storage. Remarkably, the CD-MOFs matrix protected the drug upon thermal decomposition. This study highlights the interest of CD-MOFs for the incorporation and protection of LPZ.
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Affiliation(s)
- Xue Li
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405 Orsay, France
| | - Marianna Porcino
- Université d'Orléans, CEMHTI UPR CNRS 3079, F-45071 Orléans, France
| | - Charlotte Martineau-Corcos
- Université d'Orléans, CEMHTI UPR CNRS 3079, F-45071 Orléans, France; Université Paris Saclay, ILV UMR CNRS 8180, Université de Versailles St-Quentin en Yvelines, 78035 Versailles, France; Institut Universitaire de France (IUF), 75005 Paris, France
| | - Tao Guo
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 201210 Shanghai, China
| | - Ting Xiong
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, 330004 Nanchang, China
| | - Weifeng Zhu
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, 330004 Nanchang, China
| | - Gilles Patriarche
- Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, 91120 Palaiseau, France
| | - Christine Péchoux
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, 78350 Jouy-en-Josas, France
| | | | - Alia Hassan
- Bruker Biospin Corporation, 8117 Fällanden, Switzerland
| | | | | | - Anne Zehnacker-Rentien
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405 Orsay, France
| | - Jiwen Zhang
- Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 201210 Shanghai, China; Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, 330004 Nanchang, China
| | - Ruxandra Gref
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405 Orsay, France.
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15
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Curcio A, Van de Walle A, Serrano A, Preveral S, Péchoux C, Pignol D, Menguy N, Lefevre CT, Espinosa A, Wilhelm C. Transformation Cycle of Magnetosomes in Human Stem Cells: From Degradation to Biosynthesis of Magnetic Nanoparticles Anew. ACS Nano 2020; 14:1406-1417. [PMID: 31880428 DOI: 10.1021/acsnano.9b08061] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The nanoparticles produced by magnetotactic bacteria, called magnetosomes, are made of a magnetite core with high levels of crystallinity surrounded by a lipid bilayer. This organized structure has been developed during the course of evolution of these organisms to adapt to their specific habitat and is assumed to resist degradation and to be able to withstand the demanding biological environment. Herein, we investigated magnetosomes' structural fate upon internalization in human stem cells using magnetic and photothermal measurements, electron microscopy, and X-ray absorption spectroscopy. All measurements first converge to the demonstration that intracellular magnetosomes can experience an important biodegradation, with up to 70% of their initial content degraded, which is associated with the progressive storage of the released iron in the ferritin protein. It correlates with an extensive magnetite to ferrihydrite phase transition. The ionic species delivered by this degradation could then be used by the cells to biosynthesize magnetic nanoparticles anew. In this case, cell magnetism first decreased with magnetosomes being dissolved, but then cells remagnetized entirely, evidencing the neo-synthesis of biogenic magnetic nanoparticles. Bacteria-made biogenic magnetosomes can thus be totally remodeled by human stem cells, into human cells-made magnetic nanoparticles.
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Affiliation(s)
- Alberto Curcio
- Laboratoire Matière et Systèmes, Complexes MSC, UMR 7057, CNRS and University of Paris , 75205 , Paris Cedex 13 , France
| | - Aurore Van de Walle
- Laboratoire Matière et Systèmes, Complexes MSC, UMR 7057, CNRS and University of Paris , 75205 , Paris Cedex 13 , France
| | - Aida Serrano
- Spanish CRG beamline at the European Synchrotron (ESRF) , B.P. 220, F-38043 Grenoble , France
- Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC) , Consejo Superior de Investigaciones Cientı́ficas , Cantoblanco, E-28049 Madrid , Spain
| | - Sandra Preveral
- Institute of Biosciences and Biotechnologies of Aix Marseille (BIAM), UMR7265 CEA - CNRS - Aix Marseille University, CEA Cadarache , F-13108 Saint-Paul-lez-Durance , France
| | - Christine Péchoux
- INRAE, UMR 1313 GABI , MIMA2-Plateau de Microscopie Electronique, 78352 Jouy-en-Josas , France
| | - David Pignol
- Institute of Biosciences and Biotechnologies of Aix Marseille (BIAM), UMR7265 CEA - CNRS - Aix Marseille University, CEA Cadarache , F-13108 Saint-Paul-lez-Durance , France
| | - Nicolas Menguy
- Sorbonne Université , UMR CNRS 7590, MNHN, IRD, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, IMPMC, 4 Place Jussieu , 75005 Paris , France
| | - Christopher T Lefevre
- Institute of Biosciences and Biotechnologies of Aix Marseille (BIAM), UMR7265 CEA - CNRS - Aix Marseille University, CEA Cadarache , F-13108 Saint-Paul-lez-Durance , France
| | - Ana Espinosa
- Laboratoire Matière et Systèmes, Complexes MSC, UMR 7057, CNRS and University of Paris , 75205 , Paris Cedex 13 , France
- IMDEA Nanociencia , c/Faraday, 9 , 28049 Madrid , Spain
| | - Claire Wilhelm
- Laboratoire Matière et Systèmes, Complexes MSC, UMR 7057, CNRS and University of Paris , 75205 , Paris Cedex 13 , France
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16
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Theodorou I, Courtin P, Palussière S, Kulakauskas S, Bidnenko E, Péchoux C, Fenaille F, Penno C, Mahony J, van Sinderen D, Chapot-Chartier MP. A dual-chain assembly pathway generates the high structural diversity of cell-wall polysaccharides in Lactococcus lactis. J Biol Chem 2019; 294:17612-17625. [PMID: 31582566 DOI: 10.1074/jbc.ra119.009957] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 09/30/2019] [Indexed: 12/12/2022] Open
Abstract
In Lactococcus lactis, cell-wall polysaccharides (CWPSs) act as receptors for many bacteriophages, and their structural diversity among strains explains, at least partially, the narrow host range of these viral predators. Previous studies have reported that lactococcal CWPS consists of two distinct components, a variable chain exposed at the bacterial surface, named polysaccharide pellicle (PSP), and a more conserved rhamnan chain anchored to, and embedded inside, peptidoglycan. These two chains appear to be covalently linked to form a large heteropolysaccharide. The molecular machinery for biosynthesis of both components is encoded by a large gene cluster, named cwps In this study, using a CRISPR/Cas-based method, we performed a mutational analysis of the cwps genes. MALDI-TOF MS-based structural analysis of the mutant CWPS combined with sequence homology, transmission EM, and phage sensitivity analyses enabled us to infer a role for each protein encoded by the cwps cluster. We propose a comprehensive CWPS biosynthesis scheme in which the rhamnan and PSP chains are independently synthesized from two distinct lipid-sugar precursors and are joined at the extracellular side of the cytoplasmic membrane by a mechanism involving a membrane-embedded glycosyltransferase with a GT-C fold. The proposed scheme encompasses a system that allows extracytoplasmic modification of rhamnan by complex substituting oligo-/polysaccharides. It accounts for the extensive diversity of CWPS structures observed among lactococci and may also have relevance to the biosynthesis of complex rhamnose-containing CWPSs in other Gram-positive bacteria.
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Affiliation(s)
- Ilias Theodorou
- School of Microbiology, University College Cork, Western Road, Cork, Ireland.,APC Microbiome Ireland, University College Cork, Western Road, Cork, Ireland
| | - Pascal Courtin
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Simon Palussière
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Saulius Kulakauskas
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Elena Bidnenko
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Christine Péchoux
- INRA, UMR 1313 Génétique Animale et Biologie Intégrative (GABI), Plate-forme MIMA2, 78350 Jouy-en-Josas, France
| | - François Fenaille
- CEA, Institut Joliot, Service de Pharmacologie et d'Immunoanalyse, UMR 0496, Laboratoire d'Etude du Métabolisme des Médicaments, MetaboHUB-Paris, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - Christophe Penno
- School of Microbiology, University College Cork, Western Road, Cork, Ireland.,APC Microbiome Ireland, University College Cork, Western Road, Cork, Ireland
| | - Jennifer Mahony
- School of Microbiology, University College Cork, Western Road, Cork, Ireland.,APC Microbiome Ireland, University College Cork, Western Road, Cork, Ireland
| | - Douwe van Sinderen
- School of Microbiology, University College Cork, Western Road, Cork, Ireland .,APC Microbiome Ireland, University College Cork, Western Road, Cork, Ireland
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17
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Coen O, Lu J, Xu W, De Vos D, Péchoux C, Domergue F, Grain D, Lepiniec L, Magnani E. Deposition of a cutin apoplastic barrier separating seed maternal and zygotic tissues. BMC Plant Biol 2019; 19:304. [PMID: 31291882 PMCID: PMC6617593 DOI: 10.1186/s12870-019-1877-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 06/09/2019] [Indexed: 05/19/2023]
Abstract
BACKGROUND In flowering plants, proper seed development is achieved through the constant interplay of fertilization products, embryo and endosperm, and maternal tissues. Communication between these compartments is supposed to be tightly regulated at their interfaces. Here, we characterize the deposition pattern of an apoplastic lipid barrier between the maternal inner integument and fertilization products in Arabidopsis thaliana seeds. RESULTS We demonstrate that an apoplastic lipid barrier is first deposited by the ovule inner integument and undergoes de novo cutin deposition following central cell fertilization and relief of the FERTILIZATION INDEPENDENT SEED Polycomb group repressive mechanism. In addition, we show that the WIP zinc-finger TRANSPARENT TESTA 1 and the MADS-Box TRANSPARENT TESTA 16 transcription factors act maternally to promote its deposition by regulating cuticle biosynthetic pathways. Finally, mutant analyses indicate that this apoplastic barrier allows correct embryo sliding along the seed coat. CONCLUSIONS Our results revealed that the deposition of a cutin apoplastic barrier between seed maternal and zygotic tissues is part of the seed coat developmental program.
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Affiliation(s)
- Olivier Coen
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, University of Paris-Saclay, Route de St-Cyr (RD10), 78026 Versailles Cedex, France
- École Doctorale 567 Sciences du Végétal, University Paris-Sud, University of Paris-Saclay, bat 360, 91405 Orsay Cedex, France
| | - Jing Lu
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, University of Paris-Saclay, Route de St-Cyr (RD10), 78026 Versailles Cedex, France
- École Doctorale 567 Sciences du Végétal, University Paris-Sud, University of Paris-Saclay, bat 360, 91405 Orsay Cedex, France
| | - Wenjia Xu
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, University of Paris-Saclay, Route de St-Cyr (RD10), 78026 Versailles Cedex, France
| | - Delphine De Vos
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, University of Paris-Saclay, Route de St-Cyr (RD10), 78026 Versailles Cedex, France
| | - Christine Péchoux
- INRA, Génétique Animale et Biologie Intégrative, Domaine de Vilvert, Cedex, 78352 Jouy-en-Josas, France
| | - Frédéric Domergue
- Laboratoire de Biogenèse Membranaire, University of Bordeaux, UMR 5200, CNRS /, 71 av. E. Bourleaux, CS 20032, 33140 Villenave d’Ornon, France
| | - Damaris Grain
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, University of Paris-Saclay, Route de St-Cyr (RD10), 78026 Versailles Cedex, France
| | - Loïc Lepiniec
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, University of Paris-Saclay, Route de St-Cyr (RD10), 78026 Versailles Cedex, France
| | - Enrico Magnani
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, University of Paris-Saclay, Route de St-Cyr (RD10), 78026 Versailles Cedex, France
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18
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Le Guillou S, Laubier J, Péchoux C, Aujean E, Castille J, Leroux C, Le Provost F. Defects of the endoplasmic reticulum and changes to lipid droplet size in mammary epithelial cells due to miR-30b-5p overexpression are correlated to a reduction in Atlastin 2 expression. Biochem Biophys Res Commun 2019; 512:283-288. [PMID: 30879769 DOI: 10.1016/j.bbrc.2019.03.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 03/03/2019] [Indexed: 10/27/2022]
Abstract
During lactation, mammary epithelial cells secrete fat in the form of milk fat globules that originate from intracellular lipid droplets. These droplets may form de novo from the endoplasmic reticulum or be derived from existing lipid droplets; they then either grow because enzymes of triacylglycerol synthesis relocate from the reticulum to their surface, or due to fusion and fission with other droplets. The overexpression of miR-30b-5p in the developing mouse mammary gland impairs lactation, which includes an increase in lipid droplet size. This study was performed to understand the origin of this defect affecting lipid droplets observed in transgenic mice. Electron microscopy analyses revealed a fragmented and discontinued tubular network of endoplasmic reticulum in the mammary epithelial cells of transgenic mice. The milk fatty acid composition was modified, with lower levels of medium-chain saturated fatty acids and a proportional increase in long-chain monounsaturated fatty acids in transgenic versus wild-type mice. Further, investigations of microRNA targets revealed a significant downregulation of ATLASTIN 2 (a GTPase described as playing a key role in lipid droplet formation) due to miR-30b-5p overexpression. Our results suggest that the increase in lipid droplet size observed in the mammary epithelial cells of transgenic mice might result from changes to lipid droplet formation and secretion because of direct modifications to Atl2 expression and indirect changes to endoplasmic reticulum morphology resulting from the overexpression of miR-30b-5p.
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Affiliation(s)
- Sandrine Le Guillou
- GABI, INRA, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France.
| | - Johann Laubier
- GABI, INRA, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France.
| | - Christine Péchoux
- GABI, INRA, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France.
| | - Etienne Aujean
- GABI, INRA, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France.
| | - Johan Castille
- GABI, INRA, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France.
| | - Christine Leroux
- INRA, UMR1213 Herbivores, F-63122, Saint Genès Champanelle, France; UC Davis, Food Science and Technology Department, Davis, CA, 95616, USA.
| | - Fabienne Le Provost
- GABI, INRA, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France.
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19
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Hue-Beauvais C, Aujean E, Miranda G, Ralliard-Rousseau D, Valentino S, Brun N, Ladebese S, Péchoux C, Chavatte-Palmer P, Charlier M. Impact of exposure to diesel exhaust during pregnancy on mammary gland development and milk composition in the rabbit. PLoS One 2019; 14:e0212132. [PMID: 30763367 PMCID: PMC6375667 DOI: 10.1371/journal.pone.0212132] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 01/28/2019] [Indexed: 01/03/2023] Open
Abstract
Exposure to fine-particulate air pollution is a major global health concern because it is associated with reduced birth weight and an increased risk of cardiovascular disease. Here we have investigated the potential for exposure to diesel exhaust during pregnancy to influence mammary gland development and milk composition. Female rabbits were therefore exposed by nose-only inhalation to either diluted diesel exhaust fumes (1 mg/m3) or clean air for 2h/day, 5 days/week, from the 3rd to the 27th days of pregnancy. On Day 28 of pregnancy, mammary glands were collected from twelve females (six controls and six diesel-exposed) and assessed for morphological and functional alterations. Milk samples were collected from eighteen dams (nine controls and nine diesel-exposed) during early (days 2 to 4) and established (days 13 to 16) lactation to verify the composition of fatty acids and major proteins and leptin levels. The mammary alveolar lumina contained numerous fat globules, and stearoyl CoA reductase expression was higher in mammary epithelia from diesel exhaust-exposed rabbits, which together suggested increased mammary lipid biosynthesis. Gas chromatography analysis of the composition of milk fatty acids revealed a sharp rise in the total fatty acid content, mainly due to monounsaturated fatty acids. Liquid chromatography-mass spectrometry analysis of milk samples enabled identification and quantification of the main rabbit milk proteins and their main phosphorylated isoforms, and revealed important changes to individual casein and whey protein contents and to their most phosphorylated isoforms during early lactation. Taken together, these findings suggest that repeated daily exposure to diesel exhaust fumes during pregnancy at urban pollution levels can influence lipid metabolism in the mammary gland and the lipid and protein composition of milk. As milk may contribute to metabolic programming, such alterations affecting milk composition should be taken into account from a public health perspective.
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Affiliation(s)
- Cathy Hue-Beauvais
- UMR GABI, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Etienne Aujean
- UMR GABI, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Guy Miranda
- UMR GABI, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | | | - Sarah Valentino
- UMR BDR, INRA, ENVA, Université Paris Saclay, Jouy-en-Josas, France
| | - Nicolas Brun
- UMR GABI, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Stessy Ladebese
- UMR GABI, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Christine Péchoux
- UMR GABI, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | | | - Madia Charlier
- UMR GABI, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
- * E-mail:
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20
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Skerniškytė J, Krasauskas R, Péchoux C, Kulakauskas S, Armalytė J, Sužiedėlienė E. Surface-Related Features and Virulence Among Acinetobacter baumannii Clinical Isolates Belonging to International Clones I and II. Front Microbiol 2019; 9:3116. [PMID: 30671029 PMCID: PMC6331429 DOI: 10.3389/fmicb.2018.03116] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 12/03/2018] [Indexed: 01/07/2023] Open
Abstract
Acinetobacter baumannii currently represents one of the most important nosocomial infection agent due to its multidrug-resistance and a propensity for the epidemic spread. The A. baumannii strains belonging to the international clonal lineages I (IC I) and II (IC II) are associated with the hospital outbreaks and a high virulence. However, the intra and inter lineage-specific features of strains belonging to these most worldwide spread A. baumannii clones are not thoroughly explored. In this study we have investigated a set of cell surface-related features of A. baumannii IC I (n = 20) and IC II (n = 16) lineage strains, representing 30 distinct pulsed-field gel electrophoresis types in the collection of clinical isolates obtained in Lithuanian tertiary care hospitals. We show that A. baumannii IC II strains are non-motile, do not form pellicle and display distinct capsular polysaccharide profile compared with the IC I strains. Moreover, in contrast to the overall highly hydrophobic IC I strains, IC II strains showed a greater variation in cell surface hydrophobicity. Within the IC II lineage, hydrophilic strains demonstrated reduced ability to form biofilm and adhere to the abiotic surfaces, also possessed twofold thicker cell wall and exhibited higher resistance to desiccation. Furthermore, these strains showed increased adherence to the lung epithelial cells and were more virulent in nematode and mouse infection model compared with the hydrophobic IC II strains. According to the polymerase chain reaction-based locus-typing, the reduction in hydrophobicity of IC II strains was not capsule or lipooligosaccharide locus type-dependent. Hence, this study shows that the most widespread A. baumannii clonal lineages I and II markedly differ in the series of cell surface-related phenotypes including the considerable phenotypic diversification of IC II strains at the intra-lineage level. These findings suggest that the genotypically related A. baumannii strains might evolve the features which could provide an advantage at the specific conditions outside or within the host.
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Affiliation(s)
- Jūratė Skerniškytė
- Institute of Biosciences, Life Sciences Center, Vilnius University, Vilnius, Lithuania
| | - Renatas Krasauskas
- Institute of Biosciences, Life Sciences Center, Vilnius University, Vilnius, Lithuania
| | | | - Saulius Kulakauskas
- INRA, MICALIS Institute, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Julija Armalytė
- Institute of Biosciences, Life Sciences Center, Vilnius University, Vilnius, Lithuania
| | - Edita Sužiedėlienė
- Institute of Biosciences, Life Sciences Center, Vilnius University, Vilnius, Lithuania
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21
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Coen O, Lu J, Xu W, Pateyron S, Grain D, Péchoux C, Lepiniec L, Magnani E. A TRANSPARENT TESTA Transcriptional Module Regulates Endothelium Polarity. Front Plant Sci 2019; 10:1801. [PMID: 32117351 PMCID: PMC7015901 DOI: 10.3389/fpls.2019.01801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 12/23/2019] [Indexed: 05/06/2023]
Abstract
Seeds have greatly contributed to the successful colonization of land by plants. Compared to spores, seeds carry nutrients, rely less on water for germination, provide a higher degree of protection against biotic and abiotic stresses, and can disperse in different ways. Such advantages are, to a great extent, provided by the seed coat. The evolution of a multi-function seed-coat is inheritably linked to the evolution of tissue polarity, which allows the development of morphologically and functionally distinct domains. Here, we show that the endothelium, the innermost cell layer of the seed coat, displays distinct morphological features along the proximal-distal axis. Furthermore, we identified a TRANSPARENT TESTA transcriptional module that contributes to establishing endothelium polarity and responsiveness to fertilization. Finally, we characterized its downstream gene pathway by whole-genome transcriptional analyses. We speculate that such a regulatory module might have been responsible for the evolution of morphological diversity in seed shape, micropylar pore formation, and cuticle deposition.
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Affiliation(s)
- Olivier Coen
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, University of Paris-Saclay, Versailles, France
- École Doctorale 567 Sciences du Végétal, University Paris-Sud, University of Paris-Saclay, Orsay, France
| | - Jing Lu
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, University of Paris-Saclay, Versailles, France
- École Doctorale 567 Sciences du Végétal, University Paris-Sud, University of Paris-Saclay, Orsay, France
| | - Wenjia Xu
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, University of Paris-Saclay, Versailles, France
| | - Stéphanie Pateyron
- TranscriptOmic Platform of IPS2, Institute of Plant Sciences Paris Saclay IPS2, CNRS, INRA, Université Paris-Sud, Université Evry, Université Paris-Saclay, Orsay, France
| | - Damaris Grain
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, University of Paris-Saclay, Versailles, France
| | - Christine Péchoux
- INRA, Génétique Animale et Biologie Intégrative, Jouy-en-Josas, France
| | - Loïc Lepiniec
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, University of Paris-Saclay, Versailles, France
| | - Enrico Magnani
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, University of Paris-Saclay, Versailles, France
- *Correspondence: Enrico Magnani,
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22
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Li J, Bed’hom B, Marthey S, Valade M, Dureux A, Moroldo M, Péchoux C, Coville J, Gourichon D, Vieaud A, Dorshorst B, Andersson L, Tixier‐Boichard M. A missense mutation in
TYRP1
causes the chocolate plumage color in chicken and alters melanosome structure. Pigment Cell Melanoma Res 2018; 32:381-390. [DOI: 10.1111/pcmr.12753] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Revised: 09/19/2018] [Accepted: 10/02/2018] [Indexed: 12/30/2022]
Affiliation(s)
- Jingyi Li
- Department of Animal and Poultry Sciences Virginia Tech Blacksburg Virginia
- Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences Texas A&M University College Station Texas
| | - Bertrand Bed’hom
- GABI, AgroParisTech, INRA Université Paris‐Saclay Jouy‐en‐Josas France
| | - Sylvain Marthey
- GABI, AgroParisTech, INRA Université Paris‐Saclay Jouy‐en‐Josas France
| | - Mathieu Valade
- GABI, AgroParisTech, INRA Université Paris‐Saclay Jouy‐en‐Josas France
| | - Audrey Dureux
- GABI, AgroParisTech, INRA Université Paris‐Saclay Jouy‐en‐Josas France
| | - Marco Moroldo
- GABI, AgroParisTech, INRA Université Paris‐Saclay Jouy‐en‐Josas France
| | - Christine Péchoux
- GABI, AgroParisTech, INRA Université Paris‐Saclay Jouy‐en‐Josas France
| | - Jean‐Luc Coville
- GABI, AgroParisTech, INRA Université Paris‐Saclay Jouy‐en‐Josas France
| | | | - Agathe Vieaud
- GABI, AgroParisTech, INRA Université Paris‐Saclay Jouy‐en‐Josas France
| | - Ben Dorshorst
- Department of Animal and Poultry Sciences Virginia Tech Blacksburg Virginia
| | - Leif Andersson
- Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences Texas A&M University College Station Texas
- Science for Life Laboratory, Department of Medical Biochemistry and Microbiology Uppsala University Uppsala Sweden
- Department of Animal Breeding and Genetics Swedish University of Agricultural Sciences Uppsala Sweden
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23
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Espinosa A, Curcio A, Cabana S, Radtke G, Bugnet M, Kolosnjaj-Tabi J, Péchoux C, Alvarez-Lorenzo C, Botton GA, Silva AKA, Abou-Hassan A, Wilhelm C. Intracellular Biodegradation of Ag Nanoparticles, Storage in Ferritin, and Protection by a Au Shell for Enhanced Photothermal Therapy. ACS Nano 2018; 12:6523-6535. [PMID: 29906096 DOI: 10.1021/acsnano.8b00482] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Despite their highly efficient plasmonic properties, gold nanoparticles are currently preferred to silver nanoparticles for biomedical applications such as photothermal therapy due to their high chemical stability in the biological environment. To confer protection while preserving their plasmonic properties, we allied the advantages of both materials and produced hybrid nanoparticles made of an anisotropic silver nanoplate core coated with a frame of gold. The efficiency of these hybrid nanoparticles (Ag@AuNPs) in photothermia was compared to monometallic silver nanoplates (AgNPs) or gold nanostars (AuNPs). The structural and functional properties of AuNPs, AgNPs, and Ag@AuNPs were investigated in environments of increasing complexity, in water suspensions, in cells, and in tumors in vivo. While AgNPs showed the greatest heating efficiency in suspension (followed by Ag@AuNPs and AuNPs), this trend was reversed intracellularly within a tissue-mimetic model. In this setup, AgNPs failed to provide consistent photothermal conversion over time, due to structural damage induced by the intracellular environment. Remarkably, the degraded Ag was found to be stored within the iron-storage ferritin protein. By contrast, the Au shell provided the Ag@AuNPs with total Ag biopersistence. As a result, photothermal therapy was successful with Ag@AuNPs in vivo in a mouse tumor model, providing the ultimate proof on Au shell's capability to shield the Ag core from the harsh biological environment and preserve its excellent heating properties.
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Affiliation(s)
- Ana Espinosa
- Laboratoire Matière et Systèmes Complexes, UMR 7057 , CNRS and University Paris Diderot , 75205 Paris Cedex 13, France
| | - Alberto Curcio
- Laboratoire Matière et Systèmes Complexes, UMR 7057 , CNRS and University Paris Diderot , 75205 Paris Cedex 13, France
- Sorbonne Université, CNRS, PHysico-chimie des Electrolytes et Nanosystèmes InterfaciauX, PHENIX , F-75005 Paris , France
| | - Sonia Cabana
- Laboratoire Matière et Systèmes Complexes, UMR 7057 , CNRS and University Paris Diderot , 75205 Paris Cedex 13, France
- Sorbonne Université, CNRS, PHysico-chimie des Electrolytes et Nanosystèmes InterfaciauX, PHENIX , F-75005 Paris , France
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, R+DPharma Group (GI-1645), Facultad de Farmacia and Health Research Institute of Santiago de Compostela (IDIS) , Universidade de Santiago de Compostela , 15872 Santiago de Compostela , Spain
| | - Guillaume Radtke
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC) , UMR 7590, CNRS, UPMC , 4 Place Jussieu , 75005 Paris , France
| | - Matthieu Bugnet
- Department of Materials Science and Engineering and Canadian Centre for Electron Microscopy , McMaster University , 1280 Main Street West , Hamilton , ON , Canada L8S 4M1
| | - Jelena Kolosnjaj-Tabi
- Laboratoire Matière et Systèmes Complexes, UMR 7057 , CNRS and University Paris Diderot , 75205 Paris Cedex 13, France
| | - Christine Péchoux
- INRA, UMR 1313 GABI, MIMA2-Plateau de Microscopie Electronique , 78352 Jouy-en-Josas , France
| | - Carmen Alvarez-Lorenzo
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, R+DPharma Group (GI-1645), Facultad de Farmacia and Health Research Institute of Santiago de Compostela (IDIS) , Universidade de Santiago de Compostela , 15872 Santiago de Compostela , Spain
| | - Gianluigi A Botton
- Department of Materials Science and Engineering and Canadian Centre for Electron Microscopy , McMaster University , 1280 Main Street West , Hamilton , ON , Canada L8S 4M1
| | - Amanda K A Silva
- Laboratoire Matière et Systèmes Complexes, UMR 7057 , CNRS and University Paris Diderot , 75205 Paris Cedex 13, France
| | - Ali Abou-Hassan
- Sorbonne Université, CNRS, PHysico-chimie des Electrolytes et Nanosystèmes InterfaciauX, PHENIX , F-75005 Paris , France
| | - Claire Wilhelm
- Laboratoire Matière et Systèmes Complexes, UMR 7057 , CNRS and University Paris Diderot , 75205 Paris Cedex 13, France
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Kortebi M, Milohanic E, Mitchell G, Péchoux C, Prevost MC, Cossart P, Bierne H. Listeria monocytogenes switches from dissemination to persistence by adopting a vacuolar lifestyle in epithelial cells. PLoS Pathog 2017; 13:e1006734. [PMID: 29190284 PMCID: PMC5708623 DOI: 10.1371/journal.ppat.1006734] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 11/04/2017] [Indexed: 12/26/2022] Open
Abstract
Listeria monocytogenes causes listeriosis, a foodborne disease that poses serious risks to fetuses, newborns and immunocompromised adults. This intracellular bacterial pathogen proliferates in the host cytosol and exploits the host actin polymerization machinery to spread from cell-to-cell and disseminate in the host. Here, we report that during several days of infection in human hepatocytes or trophoblast cells, L. monocytogenes switches from this active motile lifestyle to a stage of persistence in vacuoles. Upon intercellular spread, bacteria gradually stopped producing the actin-nucleating protein ActA and became trapped in lysosome-like vacuoles termed Listeria-Containing Vacuoles (LisCVs). Subpopulations of bacteria resisted degradation in LisCVs and entered a slow/non-replicative state. During the subculture of host cells harboring LisCVs, bacteria showed a capacity to cycle between the vacuolar and the actin-based motility stages. When ActA was absent, such as in ΔactA mutants, vacuolar bacteria parasitized host cells in the so-called “viable but non-culturable” state (VBNC), preventing their detection by conventional colony counting methods. The exposure of infected cells to high doses of gentamicin did not trigger the formation of LisCVs, but selected for vacuolar and VBNC bacteria. Together, these results reveal the ability of L. monocytogenes to enter a persistent state in a subset of epithelial cells, which may favor the asymptomatic carriage of this pathogen, lengthen the incubation period of listeriosis, and promote bacterial survival during antibiotic therapy. L. monocytogenes is a model intracellular pathogen that replicates in the cytoplasm of mammalian cells and disseminate in the host using actin-based motility. Here, we reveal that L. monocytogenes changes its lifestyle and persists in lysosomal vacuoles during long-term infection of human hepatocytes and trophoblast cells. When the virulence factor ActA is not expressed, subpopulations of vacuolar bacteria enter a dormant viable but non-culturable (VBNC) state. This novel facet of the L. monocytogenes intracellular life could contribute to the asymptomatic carriage of this pathogen in epithelial tissues and render it tolerant to antibiotic therapy and undetectable by routine culture techniques.
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Affiliation(s)
- Mounia Kortebi
- Micalis Institute, Inra, AgroParisTech, Université Paris-Saclay, Equipe Epigénétique et Microbiologie Cellulaire, Jouy-en-Josas, France
| | - Eliane Milohanic
- Micalis Institute, Inra, AgroParisTech, Université Paris-Saclay, Equipe Epigénétique et Microbiologie Cellulaire, Jouy-en-Josas, France
| | - Gabriel Mitchell
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, California, United States of America
| | - Christine Péchoux
- Unité GABI, Inra, AgroParisTech, Université Paris-Saclay, Plate-Forme MIMA2, Jouy-en-Josas, France
| | | | - Pascale Cossart
- Institut Pasteur, Unité des interactions Bactéries-Cellules, Paris, France
- Inserm, U604, Paris, France
- Inra, USC2020, Paris, France
| | - Hélène Bierne
- Micalis Institute, Inra, AgroParisTech, Université Paris-Saclay, Equipe Epigénétique et Microbiologie Cellulaire, Jouy-en-Josas, France
- * E-mail:
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25
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Espinosa A, Silva AKA, Sánchez-Iglesias A, Grzelczak M, Péchoux C, Desboeufs K, Liz-Marzán LM, Wilhelm C. Photothermal Therapy: Cancer Cell Internalization of Gold Nanostars Impacts Their Photothermal Efficiency In Vitro and In Vivo: Toward a Plasmonic Thermal Fingerprint in Tumoral Environment (Adv. Healthcare Mater. 9/2016). Adv Healthc Mater 2016. [DOI: 10.1002/adhm.201670046] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ana Espinosa
- Laboratoire Matière et Systèmes Complexes (MSC); UMR 7057; CNRS and Université Paris Diderot; 75205 Paris cedex 13 France
| | - Amanda K. A. Silva
- Laboratoire Matière et Systèmes Complexes (MSC); UMR 7057; CNRS and Université Paris Diderot; 75205 Paris cedex 13 France
| | - Ana Sánchez-Iglesias
- BioNanoPlasmonics Laboratory; CIC biomaGUNE; Paseo de Miramón 182 20009 Donostia San Sebastián Spain
| | - Marek Grzelczak
- BioNanoPlasmonics Laboratory; CIC biomaGUNE; Paseo de Miramón 182 20009 Donostia San Sebastián Spain
- Ikerbasque; Basque Foundation for Science; 48013 Bilbao Spain
| | - Christine Péchoux
- GABI; INRA - MIMA2-MET; AgroParisTech; Université Paris-Saclay; 78350 Jouy-en-Josas France
| | - Karine Desboeufs
- LISA; CNRS UMR 7583; Université Paris-Diderot et Université Paris-Est Créteil, 61; av du Général de Gaulles; 94010 Créteil France
| | - Luis M. Liz-Marzán
- BioNanoPlasmonics Laboratory; CIC biomaGUNE; Paseo de Miramón 182 20009 Donostia San Sebastián Spain
- Ikerbasque; Basque Foundation for Science; 48013 Bilbao Spain
- Biomedical Research Networking Center in Bioengineering; Biomaterials and Nanomedicine (CIBER-BBN); 50018 Aragon Spain
| | - Claire Wilhelm
- Laboratoire Matière et Systèmes Complexes (MSC); UMR 7057; CNRS and Université Paris Diderot; 75205 Paris cedex 13 France
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Espinosa A, Silva AKA, Sánchez‐Iglesias A, Grzelczak M, Péchoux C, Desboeufs K, Liz‐Marzán LM, Wilhelm C. Cancer Cell Internalization of Gold Nanostars Impacts Their Photothermal Efficiency In Vitro and In Vivo: Toward a Plasmonic Thermal Fingerprint in Tumoral Environment. Adv Healthc Mater 2016; 5:1040-8. [PMID: 26990061 DOI: 10.1002/adhm.201501035] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 01/22/2016] [Indexed: 11/08/2022]
Abstract
Gold nanoparticles are prime candidates for cancer thermotherapy. However, while the ultimate target for nanoparticle-mediated photothermal therapy is the cancer cell, heating performance has not previously been evaluated in the tumoral environment. A systematic investigation of gold nanostar heat-generating efficiency in situ is presented: not only in cancer cells in vitro but also after intratumoral injection in vivo. It is demonstrated that (i) in aqueous dispersion, heat generation is governed by particle size and exciting laser wavelength; (ii) in cancer cells in vitro, heat generation is still very efficient, but irrespective of both particle size and laser wavelength; and (iii) heat generation by nanostars injected into tumors in vivo evolves with time, as the nanostars are trafficked from the extracellular matrix into endosomes. The plasmonic heating response thus serves as a signature of nanoparticle internalization in cells, bringing the ultimate goal of nanoparticle-mediated photothermal therapy a step closer.
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Affiliation(s)
- Ana Espinosa
- Laboratoire Matière et Systèmes Complexes (MSC) UMR 7057 CNRS and Université Paris Diderot 75205 Paris cedex 13 France
| | - Amanda K. A. Silva
- Laboratoire Matière et Systèmes Complexes (MSC) UMR 7057 CNRS and Université Paris Diderot 75205 Paris cedex 13 France
| | - Ana Sánchez‐Iglesias
- BioNanoPlasmonics Laboratory CIC biomaGUNE Paseo de Miramón 182 20009 Donostia San Sebastián Spain
| | - Marek Grzelczak
- BioNanoPlasmonics Laboratory CIC biomaGUNE Paseo de Miramón 182 20009 Donostia San Sebastián Spain
- Ikerbasque Basque Foundation for Science 48013 Bilbao Spain
| | - Christine Péchoux
- GABI INRA – MIMA2‐MET AgroParisTech Université Paris‐Saclay 78350 Jouy‐en‐Josas France
| | - Karine Desboeufs
- LISA CNRS UMR 7583 Université Paris‐Diderot et Université Paris‐Est Créteil, 61 av du Général de Gaulles 94010 Créteil France
| | - Luis M. Liz‐Marzán
- BioNanoPlasmonics Laboratory CIC biomaGUNE Paseo de Miramón 182 20009 Donostia San Sebastián Spain
- Ikerbasque Basque Foundation for Science 48013 Bilbao Spain
- Biomedical Research Networking Center in Bioengineering Biomaterials and Nanomedicine (CIBER‐BBN) 50018 Aragon Spain
| | - Claire Wilhelm
- Laboratoire Matière et Systèmes Complexes (MSC) UMR 7057 CNRS and Université Paris Diderot 75205 Paris cedex 13 France
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Solopova A, Formosa-Dague C, Courtin P, Furlan S, Veiga P, Péchoux C, Armalyte J, Sadauskas M, Kok J, Hols P, Dufrêne YF, Kuipers OP, Chapot-Chartier MP, Kulakauskas S. Regulation of Cell Wall Plasticity by Nucleotide Metabolism in Lactococcus lactis. J Biol Chem 2016; 291:11323-36. [PMID: 27022026 DOI: 10.1074/jbc.m116.714303] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Indexed: 12/21/2022] Open
Abstract
To ensure optimal cell growth and separation and to adapt to environmental parameters, bacteria have to maintain a balance between cell wall (CW) rigidity and flexibility. This can be achieved by a concerted action of peptidoglycan (PG) hydrolases and PG-synthesizing/modifying enzymes. In a search for new regulatory mechanisms responsible for the maintenance of this equilibrium in Lactococcus lactis, we isolated mutants that are resistant to the PG hydrolase lysozyme. We found that 14% of the causative mutations were mapped in the guaA gene, the product of which is involved in purine metabolism. Genetic and transcriptional analyses combined with PG structure determination of the guaA mutant enabled us to reveal the pivotal role of the pyrB gene in the regulation of CW rigidity. Our results indicate that conversion of l-aspartate (l-Asp) to N-carbamoyl-l-aspartate by PyrB may reduce the amount of l-Asp available for PG synthesis and thus cause the appearance of Asp/Asn-less stem peptides in PG. Such stem peptides do not form PG cross-bridges, resulting in a decrease in PG cross-linking and, consequently, reduced PG thickness and rigidity. We hypothesize that the concurrent utilization of l-Asp for pyrimidine and PG synthesis may be part of the regulatory scheme, ensuring CW flexibility during exponential growth and rigidity in stationary phase. The fact that l-Asp availability is dependent on nucleotide metabolism, which is tightly regulated in accordance with the growth rate, provides L. lactis cells the means to ensure optimal CW plasticity without the need to control the expression of PG synthesis genes.
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Affiliation(s)
- Ana Solopova
- From the Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 7, 9747AG Groningen, The Netherlands
| | - Cécile Formosa-Dague
- Institute of Life Sciences, Université catholique de Louvain, Croix du Sud 4-5, bte L7.07.06., B-1348 Louvain-la-Neuve, Belgium, and
| | | | | | | | - Christine Péchoux
- Génétique Animale et Biologie Intégrative, Institut National de la Recherche Agronomique, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | | | | | - Jan Kok
- From the Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 7, 9747AG Groningen, The Netherlands
| | - Pascal Hols
- Institute of Life Sciences, Université catholique de Louvain, Croix du Sud 4-5, bte L7.07.06., B-1348 Louvain-la-Neuve, Belgium, and
| | - Yves F Dufrêne
- Institute of Life Sciences, Université catholique de Louvain, Croix du Sud 4-5, bte L7.07.06., B-1348 Louvain-la-Neuve, Belgium, and
| | - Oscar P Kuipers
- From the Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 7, 9747AG Groningen, The Netherlands
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Antigny F, Hautefort A, Meloche J, Belacel-Ouari M, Manoury B, Rucker-Martin C, Péchoux C, Potus F, Nadeau V, Tremblay E, Ruffenach G, Bourgeois A, Dorfmüller P, Breuils-Bonnet S, Fadel E, Ranchoux B, Jourdon P, Girerd B, Montani D, Provencher S, Bonnet S, Simonneau G, Humbert M, Perros F. Potassium Channel Subfamily K Member 3 (KCNK3) Contributes to the Development of Pulmonary Arterial Hypertension. Circulation 2016; 133:1371-85. [PMID: 26912814 DOI: 10.1161/circulationaha.115.020951] [Citation(s) in RCA: 121] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 02/12/2016] [Indexed: 11/16/2022]
Abstract
BACKGROUND Mutations in the KCNK3 gene have been identified in some patients suffering from heritable pulmonary arterial hypertension (PAH). KCNK3 encodes an outward rectifier K(+) channel, and each identified mutation leads to a loss of function. However, the pathophysiological role of potassium channel subfamily K member 3 (KCNK3) in PAH is unclear. We hypothesized that loss of function of KCNK3 is a hallmark of idiopathic and heritable PAH and contributes to dysfunction of pulmonary artery smooth muscle cells and pulmonary artery endothelial cells, leading to pulmonary artery remodeling: consequently, restoring KCNK3 function could alleviate experimental pulmonary hypertension (PH). METHODS AND RESULTS We demonstrated that KCNK3 expression and function were reduced in human PAH and in monocrotaline-induced PH in rats. Using a patch-clamp technique in freshly isolated (not cultured) pulmonary artery smooth muscle cells and pulmonary artery endothelial cells, we found that KCNK3 current decreased progressively during the development of monocrotaline-induced PH and correlated with plasma-membrane depolarization. We demonstrated that KCNK3 modulated pulmonary arterial tone. Long-term inhibition of KCNK3 in rats induced distal neomuscularization and early hemodynamic signs of PH, which were related to exaggerated proliferation of pulmonary artery endothelial cells, pulmonary artery smooth muscle cell, adventitial fibroblasts, and pulmonary and systemic inflammation. Lastly, in vivo pharmacological activation of KCNK3 significantly reversed monocrotaline-induced PH in rats. CONCLUSIONS In PAH and experimental PH, KCNK3 expression and activity are strongly reduced in pulmonary artery smooth muscle cells and endothelial cells. KCNK3 inhibition promoted increased proliferation, vasoconstriction, and inflammation. In vivo pharmacological activation of KCNK3 alleviated monocrotaline-induced PH, thus demonstrating that loss of KCNK3 is a key event in PAH pathogenesis and thus could be therapeutically targeted.
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Affiliation(s)
- Fabrice Antigny
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.).
| | - Aurélie Hautefort
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Jolyane Meloche
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Milia Belacel-Ouari
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Boris Manoury
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Catherine Rucker-Martin
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Christine Péchoux
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - François Potus
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Valérie Nadeau
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Eve Tremblay
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Grégoire Ruffenach
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Alice Bourgeois
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Peter Dorfmüller
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Sandra Breuils-Bonnet
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Elie Fadel
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Benoît Ranchoux
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Philippe Jourdon
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Barbara Girerd
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - David Montani
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Steeve Provencher
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Sébastien Bonnet
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Gérald Simonneau
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Marc Humbert
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
| | - Frédéric Perros
- From Université Paris-Sud, Faculté de Médecine, Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F.P.); AP-HP, Centre de Référence de l'Hypertension Pulmonaire Sévère, Département Hospitalo-Universitaire Thorax Innovation, Service de Pneumologie et Réanimation Respiratoire, Hôpital de Bicêtre, Le Kremlin-Bicêtre, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); UMRS 999, INSERM and Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (F.A., A.H., C.R.-M., P.D., E.F., B.R., P.J., B.G., D.M., G.S., M.H., F. Perros); Inserm, UMR S1180, Faculté de Pharmacie, Université Paris Sud, Laboratoire d'Excellence en Recherche sur le Médicament et l'Innovation Thérapeutique, Département Hospitalo-Universitaire TORINO, Châtenay-Malabry, France (M.B.-O., B.M.); Pulmonary Hypertension Research Group, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada (J.M., F. Potus, V.N., E.T., G.R., A.B., S.B.-B., S.P., S.B., F. Perros); INRA, UMR1313 Génétique Animale Biologie Intégrative, Equipe Plateforme MET-MIMA2-78352 Jouy-en-Josas, France (C.P.); and Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.)
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Vidic J, Richard CA, Péchoux C, Da Costa B, Bertho N, Mazerat S, Delmas B, Chevalier C. Amyloid Assemblies of Influenza A Virus PB1-F2 Protein Damage Membrane and Induce Cytotoxicity. J Biol Chem 2015; 291:739-51. [PMID: 26601953 DOI: 10.1074/jbc.m115.652917] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Indexed: 01/10/2023] Open
Abstract
PB1-F2 is a small accessory protein encoded by an alternative open reading frame in PB1 segments of most influenza A virus. PB1-F2 is involved in virulence by inducing mitochondria-mediated immune cells apoptosis, increasing inflammation, and enhancing predisposition to secondary bacterial infections. Using biophysical approaches we characterized membrane disruptive activity of the full-length PB1-F2 (90 amino acids), its N-terminal domain (52 amino acids), expressed by currently circulating H1N1 viruses, and its C-terminal domain (38 amino acids). Both full-length and N-terminal domain of PB1-F2 are soluble at pH values ≤6, whereas the C-terminal fragment was found soluble only at pH ≤ 3. All three peptides are intrinsically disordered. At pH ≥ 7, the C-terminal part of PB1-F2 spontaneously switches to amyloid oligomers, whereas full-length and the N-terminal domain of PB1-F2 aggregate to amorphous structures. When incubated with anionic liposomes at pH 5, full-length and the C-terminal part of PB1-F2 assemble into amyloid structures and disrupt membrane at nanomolar concentrations. PB1-F2 and its C-terminal exhibit no significant antimicrobial activity. When added in the culture medium of mammalian cells, PB1-F2 amorphous aggregates show no cytotoxicity, whereas PB1-F2 pre-assembled into amyloid oligomers or fragmented nanoscaled fibrils was highly cytotoxic. Furthermore, the formation of PB1-F2 amyloid oligomers in infected cells was directly reflected by membrane disruption and cell death as observed in U937 and A549 cells. Altogether our results demonstrate that membrane-lytic activity of PB1-F2 is closely linked to supramolecular organization of the protein.
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Affiliation(s)
- Jasmina Vidic
- From the Unité de Virologie et Immunologie Moléculaires, INRA, UR892, Domaine de Vilvert, 78350 Jouy en Josas,
| | - Charles-Adrien Richard
- From the Unité de Virologie et Immunologie Moléculaires, INRA, UR892, Domaine de Vilvert, 78350 Jouy en Josas
| | - Christine Péchoux
- the Génétique Animale et Biologie Intégrative, INRA, UMR1313, Domaine de Vilvert, 78350 Jouy en Josas, and
| | - Bruno Da Costa
- From the Unité de Virologie et Immunologie Moléculaires, INRA, UR892, Domaine de Vilvert, 78350 Jouy en Josas
| | - Nicolas Bertho
- From the Unité de Virologie et Immunologie Moléculaires, INRA, UR892, Domaine de Vilvert, 78350 Jouy en Josas
| | - Sandra Mazerat
- the Institut de Chimie Moléculaire et des Matériaux d'Orsay, Université Paris-Sud, CNRS, UMR 8182, 91400 Orsay, France
| | - Bernard Delmas
- From the Unité de Virologie et Immunologie Moléculaires, INRA, UR892, Domaine de Vilvert, 78350 Jouy en Josas
| | - Christophe Chevalier
- From the Unité de Virologie et Immunologie Moléculaires, INRA, UR892, Domaine de Vilvert, 78350 Jouy en Josas
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30
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Ranchoux B, Antigny F, Rucker-Martin C, Hautefort A, Péchoux C, Bogaard HJ, Dorfmüller P, Remy S, Lecerf F, Planté S, Chat S, Fadel E, Houssaini A, Anegon I, Adnot S, Simonneau G, Humbert M, Cohen-Kaminsky S, Perros F. Endothelial-to-mesenchymal transition in pulmonary hypertension. Circulation 2015; 131:1006-18. [PMID: 25593290 DOI: 10.1161/circulationaha.114.008750] [Citation(s) in RCA: 380] [Impact Index Per Article: 42.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The vascular remodeling responsible for pulmonary arterial hypertension (PAH) involves predominantly the accumulation of α-smooth muscle actin-expressing mesenchymal-like cells in obstructive pulmonary vascular lesions. Endothelial-to-mesenchymal transition (EndoMT) may be a source of those α-smooth muscle actin-expressing cells. METHODS AND RESULTS In situ evidence of EndoMT in human PAH was obtained by using confocal microscopy of multiple fluorescent stainings at the arterial level, and by using transmission electron microscopy and correlative light and electron microscopy at the ultrastructural level. Findings were confirmed by in vitro analyses of human PAH and control cultured pulmonary artery endothelial cells. In addition, the mRNA and protein signature of EndoMT was recognized at the arterial and lung level by quantitative real-time polymerase chain reaction and Western blot analyses. We confirmed our human observations in established animal models of pulmonary hypertension (monocrotaline and SuHx). After establishing the first genetically modified rat model linked to BMPR2 mutations (BMPR2(Δ140Ex1/+) rats), we demonstrated that EndoMT is linked to alterations in signaling of BMPR2, a gene that is mutated in 70% of cases of familial PAH and in 10% to 40% of cases of idiopathic PAH. We identified molecular actors of this pathological transition, including twist overexpression and vimentin phosphorylation. We demonstrated that rapamycin partially reversed the protein expression patterns of EndoMT, improved experimental PAH, and decreased the migration of human pulmonary artery endothelial cells, providing the proof of concept that EndoMT is druggable. CONCLUSIONS EndoMT is linked to alterations in BPMR2 signaling and is involved in the occlusive vas cular remodeling of PAH, findings that may have therapeutic implications.
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Affiliation(s)
- Benoît Ranchoux
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.)
| | - Fabrice Antigny
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.)
| | - Catherine Rucker-Martin
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.)
| | - Aurélie Hautefort
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.)
| | - Christine Péchoux
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.)
| | - Harm Jan Bogaard
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.)
| | - Peter Dorfmüller
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.)
| | - Séverine Remy
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.)
| | - Florence Lecerf
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.)
| | - Sylvie Planté
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.)
| | - Sophie Chat
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.)
| | - Elie Fadel
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.)
| | - Amal Houssaini
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.)
| | - Ignacio Anegon
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.)
| | - Serge Adnot
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.)
| | - Gerald Simonneau
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.)
| | - Marc Humbert
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.)
| | - Sylvia Cohen-Kaminsky
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.)
| | - Frédéric Perros
- From Univ. Paris-Sud, Faculté de médecine, Kremlin-Bicêtre, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); AP-HP, DHU TORINO, Centre de Référence de l'Hypertension Pulmonaire Sévère, Service de Pneumologie et Réanimation Respiratoire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France (B.R., F.A., C.R.-.M., A.H., P.D., F.L., G.S., M.H., S.C.-K., F.P.); INSERM UMR-S 999, Labex LERMIT, Hypertension Artérielle Pulmonaire: Physiopathologie et Innovation Thérapeutique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (B.R., F.A., C.R.-M., A.H., P.D., F.L., E.F., G.S., M.H., S.C.-K., F.P.); INRA U1196, Génomique et Physiologie de la Lactation - Plateau de Microscopie Electronique à Transmission, Jouy-en-Josas, France (C.P., S.C.); Service de Chirurgie Thoracique, Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France (E.F.); Service d'Anatomie Pathologique, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France (P.D., S.P.); Department of Pulmonary Medicine, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands (H.J.B.); INSERM UMR 1064-Center for Research in Transplantation and Immunology-ITUN et Transgenic Rats and Immunophenomic Platform, Nantes, France (S.R., I.A.); and INSERM U955, Département de Physiologie and Service de Cardiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), Créteil, France (A.H., S.A.).
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Beaussart A, Péchoux C, Trieu-Cuot P, Hols P, Mistou MY, Dufrêne YF. Molecular mapping of the cell wall polysaccharides of the human pathogen Streptococcus agalactiae. Nanoscale 2014; 6:14820-14827. [PMID: 25358409 DOI: 10.1039/c4nr05280c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The surface of many bacterial pathogens is covered with polysaccharides that play important roles in mediating pathogen-host interactions. In Streptococcus agalactiae, the capsular polysaccharide (CPS) is recognized as a major virulence factor while the group B carbohydrate (GBC) is crucial for peptidoglycan biosynthesis and cell division. Despite the important roles of CPS and GBC, there is little information available on the molecular organization of these glycopolymers on the cell surface. Here, we use atomic force microscopy (AFM) and transmission electron microscopy (TEM) to analyze the nanoscale distribution of CPS and GBC in wild-type (WT) and mutant strains of S. agalactiae. TEM analyses reveal that in WT bacteria, peptidoglycan is covered with a very thin (few nm) layer of GBC (the "pellicle") overlaid by a 15-45 nm thick layer of CPS (the "capsule"). AFM-based single-molecule mapping with specific antibody probes shows that CPS is exposed on WT cells, while it is hardly detected on mutant cells impaired in CPS production (ΔcpsE mutant). By contrast, both TEM and AFM show that CPS is over-expressed in mutant cells altered in GBC expression (ΔgbcO mutant), indicating that the production of the two surface glycopolymers is coordinated in WT cells. In addition, AFM topographic imaging and molecular mapping with specific lectin probes demonstrate that removal of CPS (ΔcpsE), but not of GBC (ΔgbcO), leads to the exposure of peptidoglycan, organized into 25 nm wide bands running parallel to the septum. These results indicate that CPS forms a homogeneous barrier protecting the underlying peptidoglycan from environmental exposure, while the presence of GBC does not prevent peptidoglycan detection. This work shows that single-molecule AFM, combined with high-resolution TEM, represents a powerful platform for analysing the molecular arrangement of the cell wall polymers of bacterial pathogens.
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Affiliation(s)
- Audrey Beaussart
- Université Catholique de Louvain, Institute of Life Sciences, B-1348 Louvain-la-Neuve, Belgium.
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Hue-Beauvais C, Chavatte-Palmer P, Galio L, Rousseau-Raillard D, Péchoux C, Devinoy E, Charlier M. P163: Effets à long terme de l’adiposité sur la qualité du lait et le développement de la glande mammaire de la descendance. NUTR CLIN METAB 2014. [DOI: 10.1016/s0985-0562(14)70805-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Kolosnjaj-Tabi J, Javed Y, Lartigue L, Péchoux C, Luciani N, Alloyeau D, Gazeau F. [Life cycle of magnetic nanoparticles in the organism]. Biol Aujourdhui 2014; 208:177-90. [PMID: 25190577 DOI: 10.1051/jbio/2014021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Indexed: 11/14/2022]
Abstract
The use of nanomaterials drastically increases and yet their behavior in living organisms remains poorly examined. At the same time a better comprehension of the interactions between nanoparticles and the biological environment would allow us to limit potential nanoparticle-based toxicity and fully exploit nanoparticles medical applications. In this perspective, it is high time we develop methods to detect, quantify and follow the evolution of nanoparticles in the complex biological environment, spanning all relevant scales from the nanometer up to the tissue level. In this work we follow the life cycle of magnetic nanoparticles in vivo, focusing on their transformations over time from administration to elimination. As opposed to traditional nano-toxicological approaches, we herein take the nanoparticle perspective and try to establish how biological environment might impact the particles properties and their fate (interaction with proteins, cell confinement, degradation...) from their initial state to a series of changes a nanoparticle might undergo on its journey throughout the organism.
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Affiliation(s)
- Jelena Kolosnjaj-Tabi
- Laboratoire Matière et Systèmes Complexes, CNRS - Université Paris Diderot, 75205 Paris Cedex 13, France
| | - Yasir Javed
- Laboratoire Matériaux et Phénomènes Quantiques, CNRS - Université Paris Diderot, 75205 Paris Cedex 13, France
| | - Lénaïc Lartigue
- Laboratoire Matière et Systèmes Complexes, CNRS - Université Paris Diderot, 75205 Paris Cedex 13, France - Laboratoire Matériaux et Phénomènes Quantiques, CNRS - Université Paris Diderot, 75205 Paris Cedex 13, France
| | - Christine Péchoux
- INRA UMR 1313 - Génétique Animale et Biologie Intégrative - Plate-forme MIMA2, 78352 Jouy-en-Josas Cedex, France
| | - Nathalie Luciani
- Laboratoire Matière et Systèmes Complexes, CNRS - Université Paris Diderot, 75205 Paris Cedex 13, France
| | - Damien Alloyeau
- Laboratoire Matériaux et Phénomènes Quantiques, CNRS - Université Paris Diderot, 75205 Paris Cedex 13, France
| | - Florence Gazeau
- Laboratoire Matière et Systèmes Complexes, CNRS - Université Paris Diderot, 75205 Paris Cedex 13, France
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Izzedine H, Mangier M, Ory V, Zhang SY, Sendeyo K, Bouachi K, Audard V, Péchoux C, Soria JC, Massard C, Bahleda R, Bourry E, Khayat D, Baumelou A, Lang P, Ollero M, Pawlak A, Sahali D. Expression patterns of RelA and c-mip are associated with different glomerular diseases following anti-VEGF therapy. Kidney Int 2013; 85:457-70. [PMID: 24067439 DOI: 10.1038/ki.2013.344] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Revised: 05/25/2013] [Accepted: 07/12/2013] [Indexed: 12/14/2022]
Abstract
Renal toxicity constitutes a dose-limiting side effect of anticancer therapies targeting vascular endothelial growth factor (VEGF). In order to study this further, we followed up 29 patients receiving this treatment, who experienced proteinuria, hypertension, and/or renal insufficiency. Eight developed minimal change nephropathy/focal segmental glomerulopathy (MCN/FSG)-like lesions and 13 developed thrombotic microangiopathy (TMA). Patients receiving receptor tyrosine kinase inhibitors (RTKIs) mainly developed MCN/FSG-like lesions, whereas TMA complicated anti-VEGF therapy. There were no mutations in factor H, factor I, or membrane cofactor protein of the complement alternative pathway, while plasma ADAMTS13 activity persisted and anti-ADAMTS13 antibodies were undetectable in patients with TMA. Glomerular VEGF expression was undetectable in TMA and decreased in MCN/FSG. Glomeruli from patients with TMA displayed a high abundance of RelA in endothelial cells and in the podocyte nuclei, but c-mip was not detected. Conversely, MCN/FSG-like lesions exhibited a high abundance of c-mip, whereas RelA was scarcely detected. RelA binds in vivo to the c-mip promoter and prevents its transcriptional activation, whereas RelA knockdown releases c-mip activation. The RTKI sorafenib inhibited RelA activity, which then promoted c-mip expression. Thus, our results suggest that c-mip and RelA define two distinct types of renal damage associated with VEGF-targeted therapies.
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Affiliation(s)
- Hassan Izzedine
- Department of Nephrology, Pitie-Salpetriere Hospital, Paris, France
| | - Melanie Mangier
- 1] INSERM U 955, Equipe 21, Créteil, France [2] Université Paris-Est Creteil, Créteil, France
| | - Virginie Ory
- 1] INSERM U 955, Equipe 21, Créteil, France [2] Université Paris-Est Creteil, Créteil, France
| | - Shao-Yu Zhang
- 1] INSERM U 955, Equipe 21, Créteil, France [2] Université Paris-Est Creteil, Créteil, France
| | - Kelhia Sendeyo
- 1] INSERM U 955, Equipe 21, Créteil, France [2] Université Paris-Est Creteil, Créteil, France
| | - Khedidja Bouachi
- 1] INSERM U 955, Equipe 21, Créteil, France [2] Université Paris-Est Creteil, Créteil, France [3] Service de Néphrologie, AP-HP, Groupe Hospitalier Henri Mondor-Albert Chenevier, Créteil, France
| | - Vincent Audard
- 1] INSERM U 955, Equipe 21, Créteil, France [2] Université Paris-Est Creteil, Créteil, France [3] Service de Néphrologie, AP-HP, Groupe Hospitalier Henri Mondor-Albert Chenevier, Créteil, France
| | - Christine Péchoux
- INRA, UR1196 Génomique et Physiologie de la Lactation, Plateforme MIMA2, Jouy-en-Josas, France
| | | | | | | | - Edward Bourry
- Department of Nephrology, Pitie-Salpetriere Hospital, Paris, France
| | - David Khayat
- Department of Medical Oncology, Pitie-Salpetriere Hospital, Paris, France
| | - Alain Baumelou
- Department of Nephrology, Pitie-Salpetriere Hospital, Paris, France
| | - Philippe Lang
- 1] INSERM U 955, Equipe 21, Créteil, France [2] Université Paris-Est Creteil, Créteil, France [3] Service de Néphrologie, AP-HP, Groupe Hospitalier Henri Mondor-Albert Chenevier, Créteil, France
| | - Mario Ollero
- 1] INSERM U 955, Equipe 21, Créteil, France [2] Université Paris-Est Creteil, Créteil, France
| | - Andre Pawlak
- 1] INSERM U 955, Equipe 21, Créteil, France [2] Université Paris-Est Creteil, Créteil, France
| | - Djillali Sahali
- 1] INSERM U 955, Equipe 21, Créteil, France [2] Université Paris-Est Creteil, Créteil, France [3] Service de Néphrologie, AP-HP, Groupe Hospitalier Henri Mondor-Albert Chenevier, Créteil, France
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Meyrand M, Guillot A, Goin M, Furlan S, Armalyte J, Kulakauskas S, Cortes-Perez NG, Thomas G, Chat S, Péchoux C, Dupres V, Hols P, Dufrêne YF, Trugnan G, Chapot-Chartier MP. Surface proteome analysis of a natural isolate of Lactococcus lactis reveals the presence of pili able to bind human intestinal epithelial cells. Mol Cell Proteomics 2013; 12:3935-47. [PMID: 24002364 DOI: 10.1074/mcp.m113.029066] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Surface proteins of Gram-positive bacteria play crucial roles in bacterial adhesion to host tissues. Regarding commensal or probiotic bacteria, adhesion to intestinal mucosa may promote their persistence in the gastro-intestinal tract and their beneficial effects to the host. In this study, seven Lactococcus lactis strains exhibiting variable surface physico-chemical properties were compared for their adhesion to Caco-2 intestinal epithelial cells. In this test, only one vegetal isolate TIL448 expressed a high-adhesion phenotype. A nonadhesive derivative was obtained by plasmid curing from TIL448, indicating that the adhesion determinants were plasmid-encoded. Surface-exposed proteins in TIL448 were analyzed by a proteomic approach consisting in shaving of the bacterial surface with trypsin and analysis of the released peptides by LC-MS/MS. As the TIL448 complete genome sequence was not available, the tryptic peptides were identified by a mass matching approach against a database including all Lactococcus protein sequences and the sequences deduced from partial DNA sequences of the TIL448 plasmids. Two surface proteins, encoded by plasmids in TIL448, were identified as candidate adhesins, the first one displaying pilin characteristics and the second one containing two mucus-binding domains. Inactivation of the pilin gene abolished adhesion to Caco-2 cells whereas inactivation of the mucus-binding protein gene had no effect on adhesion. The pilin gene is located inside a cluster of four genes encoding two other pilin-like proteins and one class-C sortase. Synthesis of pili was confirmed by immunoblotting detection of high molecular weight forms of pilins associated to the cell wall as well as by electron and atomic force microscopy observations. As a conclusion, surface proteome analysis allowed us to detect pilins at the surface of L. lactis TIL448. Moreover we showed that pili appendages are formed and involved in adhesion to Caco-2 intestinal epithelial cells.
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Aïoun J, Chat S, Bordat C, Péchoux C. Antigen recovery and preservation using the microwave irradiation of biological samples for transmission electron microscopy analysis. Micron 2013; 52-53:16-23. [PMID: 23962686 DOI: 10.1016/j.micron.2013.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Revised: 07/10/2013] [Accepted: 07/19/2013] [Indexed: 11/15/2022]
Abstract
Most studies using microwave irradiation (MWI) for the preparation of tissue samples have reported an improvement in structural integrity. However, there have been few studies on the effect of microwave (MW) on antigen preservation during sample preparation prior to immunolocalization. This report documents our experience of specimen preparation using an automatic microwave apparatus to obtain antigen preservation and retrieval. We tested the effects of MW processing vs. conventional procedures on the morphology and antigenicity of two different tissues: the brain and mammary gland, whose chemical composition and anatomical organization are quite different. We chose to locate the transcription factor PPARβ/δ using immunocytochemistry on brain tissue sections from hamsters. Antigen retrieval protocols involving MWI were used to restore immunoreactivity. We also studied the efficiency of the ultrastructural immunolocalization of both PPARγ and caveolin-1 following MWI vs. conventional treatment, on mammary gland tissue from mice at 10 days of lactation. Our findings showed that the treatment of tissue samples with MWI, in the context of a process lasting just a few hours from fixation to immunolocalization, enabled similar, or even better, results than conventional protocols. The quantification of immunolabeling for cav-1 indicated an increase in density of up to three-fold in tissues processed in the microwave oven. Furthermore, MW treatment permitted the localization of PPARβ/δ in glutaraldehyde-fixed specimens, which was impossible in the absence of MWI. This study thus showed that techniques involving the use of microwaves could largely improve both ultrastructure and immunodetection.
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Affiliation(s)
- Josiane Aïoun
- Institut National de la Recherche Agronomique (INRA), Unité de Recherche UR902 Nutrition et Régulation Lipidique des Fonctions Cérébrales, Jouy-en-Josas, France
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37
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Lartigue L, Alloyeau D, Kolosnjaj-Tabi J, Javed Y, Guardia P, Riedinger A, Péchoux C, Pellegrino T, Wilhelm C, Gazeau F. Biodegradation of iron oxide nanocubes: high-resolution in situ monitoring. ACS Nano 2013; 7:3939-52. [PMID: 23634880 DOI: 10.1021/nn305719y] [Citation(s) in RCA: 126] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The long-term fate of nanomaterials in biological environment represents a critical matter, which determines environmental effects and potential risks for human health. Predicting these risks requires understanding of nanoparticle transformations, persistence, and degradation, some issues somehow ignored so far. Safe by design, inorganic nanostructures are being envisioned for therapy, yet fundamental principles of their processing in biological systems, change in physical properties, and in situ degradability have not been thoroughly assessed. Here we report the longitudinal visualization of iron oxide nanocube transformations inflicted by the intracellular-like environment. Structural degradation of individual nanocubes with two different surface coatings (amphiphilic polymer shell and polyethylene glycol ligand molecules) was monitored at the atomic scale with aberration-corrected high-resolution transmission electron microscopy. Our results suggest that the polymer coating controls surface reactivity and that availability and access of chelating agents to the crystal surface govern the degradation rate. This in situ study of single nanocube degradation was compared to intracellular transformations observed in mice over 14 days after intravenous injection, revealing the role of nanoparticle clustering, intracellular sorting within degradation compartments, and iron transfer and recycling into ferritin storage proteins. Our approach reduces the gap between in situ nanoscale observations in mimicking biological environments and in vivo real tracking of nanoparticle fate.
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Affiliation(s)
- Lénaic Lartigue
- Laboratoire Matières et Systèmes Complexes, UMR 7057, and Laboratoire Matériaux et Phénomènes Quantiques, UMR 7162, CNRS/Université Paris Diderot, 10 rue Alice Domon et Léonie Duquet, F-75205 Paris Cedex 13, France
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38
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Oxaran V, Ledue-Clier F, Dieye Y, Herry JM, Péchoux C, Meylheuc T, Briandet R, Juillard V, Piard JC. Pilus biogenesis in Lactococcus lactis: molecular characterization and role in aggregation and biofilm formation. PLoS One 2012; 7:e50989. [PMID: 23236417 PMCID: PMC3516528 DOI: 10.1371/journal.pone.0050989] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2012] [Accepted: 10/29/2012] [Indexed: 02/07/2023] Open
Abstract
The genome of Lactococcus lactis strain IL1403 harbors a putative pilus biogenesis cluster consisting of a sortase C gene flanked by 3 LPxTG protein encoding genes (yhgD, yhgE, and yhhB), called here pil. However, pili were not detected under standard growth conditions. Over-expression of the pil operon resulted in production and display of pili on the surface of lactococci. Functional analysis of the pilus biogenesis machinery indicated that the pilus shaft is formed by oligomers of the YhgE pilin, that the pilus cap is formed by the YhgD pilin and that YhhB is the basal pilin allowing the tethering of the pilus fibers to the cell wall. Oligomerization of pilin subunits was catalyzed by sortase C while anchoring of pili to the cell wall was mediated by sortase A. Piliated L. lactis cells exhibited an auto-aggregation phenotype in liquid cultures, which was attributed to the polymerization of major pilin, YhgE. The piliated lactococci formed thicker, more aerial biofilms compared to those produced by non-piliated bacteria. This phenotype was attributed to oligomers of YhgE. This study provides the first dissection of the pilus biogenesis machinery in a non-pathogenic Gram-positive bacterium. Analysis of natural lactococci isolates from clinical and vegetal environments showed pili production under standard growth conditions. The identification of functional pili in lactococci suggests that the changes they promote in aggregation and biofilm formation may be important for the natural lifestyle as well as for applications in which these bacteria are used.
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Affiliation(s)
- Virginie Oxaran
- INRA, UMR1319 Micalis, Domaine de Vilvert, Jouy-en-Josas, France
- Agro ParisTech, UMR 1319 Micalis, Jouy-en-Josas, France
| | - Florence Ledue-Clier
- INRA, UMR1319 Micalis, Domaine de Vilvert, Jouy-en-Josas, France
- Agro ParisTech, UMR 1319 Micalis, Jouy-en-Josas, France
| | - Yakhya Dieye
- INRA, UMR1319 Micalis, Domaine de Vilvert, Jouy-en-Josas, France
- Agro ParisTech, UMR 1319 Micalis, Jouy-en-Josas, France
| | - Jean-Marie Herry
- INRA, UMR1319 Micalis, Domaine de Vilvert, Jouy-en-Josas, France
- Agro ParisTech, UMR 1319 Micalis, Jouy-en-Josas, France
| | | | - Thierry Meylheuc
- INRA, UMR1319 Micalis, Domaine de Vilvert, Jouy-en-Josas, France
- Agro ParisTech, UMR 1319 Micalis, Jouy-en-Josas, France
| | - Romain Briandet
- INRA, UMR1319 Micalis, Domaine de Vilvert, Jouy-en-Josas, France
- Agro ParisTech, UMR 1319 Micalis, Jouy-en-Josas, France
| | - Vincent Juillard
- INRA, UMR1319 Micalis, Domaine de Vilvert, Jouy-en-Josas, France
- Agro ParisTech, UMR 1319 Micalis, Jouy-en-Josas, France
| | - Jean-Christophe Piard
- INRA, UMR1319 Micalis, Domaine de Vilvert, Jouy-en-Josas, France
- Agro ParisTech, UMR 1319 Micalis, Jouy-en-Josas, France
- * E-mail:
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Marangon I, Boggetto N, Ménard-Moyon C, Venturelli E, Béoutis ML, Péchoux C, Luciani N, Wilhelm C, Bianco A, Gazeau F. Intercellular carbon nanotube translocation assessed by flow cytometry imaging. Nano Lett 2012; 12:4830-4837. [PMID: 22928721 DOI: 10.1021/nl302273p] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The fate of carbon nanotubes in the organism is still controversial. Here, we propose a statistical high-throughput imaging method to localize and quantify functionalized multiwalled carbon nanotubes in cells. We give the first experimental evidence of an intercellular translocation of carbon nanotubes. This stress-induced longitudinal transfer of nanomaterials is mediated by cell-released microvesicles known as vectors for intercellular communication. This finding raises new critical issues for nanotoxicology, since carbon nanotubes could be disseminated by circulating extracellular cell-released vesicles and visiting several cells in the course of their passage into the organism.
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Affiliation(s)
- Iris Marangon
- CNRS/Université Paris Diderot, PRES Sorbonne-Paris Cité, Laboratoire Matière et Systèmes Complexes (MSC), UMR7057, 75205 Paris cedex 13, France
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40
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Caliot É, Dramsi S, Chapot-Chartier MP, Courtin P, Kulakauskas S, Péchoux C, Trieu-Cuot P, Mistou MY. Role of the Group B antigen of Streptococcus agalactiae: a peptidoglycan-anchored polysaccharide involved in cell wall biogenesis. PLoS Pathog 2012; 8:e1002756. [PMID: 22719253 PMCID: PMC3375309 DOI: 10.1371/journal.ppat.1002756] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Accepted: 05/03/2012] [Indexed: 11/18/2022] Open
Abstract
Streptococcus agalactiae (Group B streptococcus, GBS) is a leading cause of infections in neonates and an emerging pathogen in adults. The Lancefield Group B carbohydrate (GBC) is a peptidoglycan-anchored antigen that defines this species as a Group B Streptococcus. Despite earlier immunological and biochemical characterizations, the function of this abundant glycopolymer has never been addressed experimentally. Here, we inactivated the gene gbcO encoding a putative UDP-N-acetylglucosamine-1-phosphate:lipid phosphate transferase thought to catalyze the first step of GBC synthesis. Indeed, the gbcO mutant was unable to synthesize the GBC polymer, and displayed an important growth defect in vitro. Electron microscopy study of the GBC-depleted strain of S. agalactiae revealed a series of growth-related abnormalities: random placement of septa, defective cell division and separation processes, and aberrant cell morphology. Furthermore, vancomycin labeling and peptidoglycan structure analysis demonstrated that, in the absence of GBC, cells failed to initiate normal PG synthesis and cannot complete polymerization of the murein sacculus. Finally, the subcellular localization of the PG hydrolase PcsB, which has a critical role in cell division of streptococci, was altered in the gbcO mutant. Collectively, these findings show that GBC is an essential component of the cell wall of S. agalactiae whose function is reminiscent of that of conventional wall teichoic acids found in Staphylococcus aureus or Bacillus subtilis. Furthermore, our findings raise the possibility that GBC-like molecules play a major role in the growth of most if not all beta-hemolytic streptococci.
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Affiliation(s)
- Élise Caliot
- Institut Pasteur, Unité des Bactéries Pathogènes à Gram positif, Paris, France
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Luciani A, Dechoux S, Deveaux V, Poirier-Quinot M, Luciani N, Levy M, Ballet S, Manin S, Péchoux C, Autret G, Clément O, Rahmouni A, Mallat A, Wilhelm C, Lotersztajn S, Gazeau F. Adipose tissue macrophages: MR tracking to monitor obesity-associated inflammation. Radiology 2012; 263:786-93. [PMID: 22523321 DOI: 10.1148/radiol.12111957] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE To investigate whether cellular imaging by using ultrasmall superparamagnetic iron oxide (USPIO)-enhanced magnetic resonance (MR) imaging can allow detection and quantification of adipose tissue macrophage-related inflammation within adipose tissue in a mouse model. MATERIALS AND METHODS Experimental protocols were conducted in accordance with French government policies. Adipose tissue macrophages were detected and quantified with a 4.7-T MR imager in ob/ob obese mice on the basis of the signal variance of adipose tissue triggered by injection of P904 iron oxide nanoparticles (USPIO). Mice were either intravenously injected with 1000 μmol of iron per kilogram of body weight of P904 (10 ob/ob and 11 ob/+) or used as noninjected control animals (seven ob/ob and six ob/+). Three-dimensional T2*-weighted gradient-echo MR images were acquired 10 days after intravenous injection. MR imaging signal variance in mice was correlated to adipose tissue macrophage quantification by using monoclonal antibody to F4/80 immunostaining, to proinflammatory marker quantification by using reverse transcription polymerase chain reaction (CCl2, Tnfα, Emr1), and to P904 quantification by using electron paramagnetic resonance imaging. Quantitative data were compared by using the Mann-Whitney or Student t test, and correlations were performed by using the Pearson correlation test. RESULTS MR imaging measurements showed a significant increase in adipose tissue signal variance in ob/ob mice compared with ob/+ controls or noninjected animals (P < .0001), which was consistent with increased P904 uptake by adipose tissue in ob/ob mice. There was a significant and positive correlation between adipose tissue macrophage quantification at MR imaging and P904 iron oxide content (r = 0.87, P < .0001), adipose tissue macrophage-related inflammation at immunohistochemistry (r = 0.60, P < .01), and adipose tissue proinflammatory marker expression (r = 0.55, 0.56, and 0.58 for CCl2, Tnfα, and Emr1, respectively; P < .01). CONCLUSION P904 USPIO-enhanced MR imaging is potentially a tool for noninvasive assessment of adipose tissue inflammation during experimental obesity. These results provide the basis for translation of MR imaging into clinical practice as a marker of patients at risk for metabolic syndrome.
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Al Faraj A, Gazeau F, Wilhelm C, Devue C, Guérin CL, Péchoux C, Paradis V, Clément O, Boulanger CM, Rautou PE. Endothelial Cell–derived Microparticles Loaded with Iron Oxide Nanoparticles: Feasibility of MR Imaging Monitoring in Mice. Radiology 2012; 263:169-78. [DOI: 10.1148/radiol.11111329] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Hue-Beauvais C, Chavatte-Palmer P, Aujean E, Dahirel M, Laigre P, Péchoux C, Bouet S, Devinoy E, Charlier M. An obesogenic diet started before puberty leads to abnormal mammary gland development during pregnancy in the rabbit. Dev Dyn 2011; 240:347-56. [DOI: 10.1002/dvdy.22536] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/02/2010] [Indexed: 11/10/2022] Open
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Selvakannan P, Dumas E, Dumur F, Péchoux C, Beaunier P, Etcheberry A, Sécheresse F, Remita H, Mayer CR. Coordination chemistry approach for the end-to-end assembly of gold nanorods. J Colloid Interface Sci 2010; 349:93-7. [DOI: 10.1016/j.jcis.2010.05.050] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2010] [Revised: 04/22/2010] [Accepted: 05/14/2010] [Indexed: 11/29/2022]
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Vats N, Wilhelm C, Rautou PE, Poirier-Quinot M, Péchoux C, Devue C, Boulanger CM, Gazeau F. Magnetic tagging of cell-derived microparticles: new prospects for imaging and manipulation of these mediators of biological information. Nanomedicine (Lond) 2010; 5:727-38. [DOI: 10.2217/nnm.10.44] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aims: Submicron membrane fragments termed microparticles (MPs), which are released by apoptotic or activated cells, are newly considered as vectors of biological information and actors of pathology development. We propose the tagging of MPs with magnetic nanoparticles as a new approach allowing imaging, manipulation and targeting of cell-derived MPs. Materials & methods: MPs generated in vitro from human endothelial cells or isolated from atherosclerotic plaques were labeled using citrate-coated 8 nm iron-oxide nanoparticles. MPs were tagged with magnetic nanoparticles on their surface and detected as Annexin-V positive by flow cytometry. Results: Labeled MPs could be mobilized, isolated and manipulated at a distance in a magnetic field gradient. Magnetic mobility of labeled MPs was quantified by micromagnetophoresis. Interactions of labeled MPs with endothelial cells could be triggered and modulated by magnetic guidance. Nanoparticles served as tracers at different scales: at the subcellular level by electron microscopy, at the cellular level by histology and at the macroscopic level by MRI. Conclusion: Magnetic labeling of biogenic MPs opens new prospects for noninvasive monitoring and distal manipulations of these biological effectors.
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Affiliation(s)
- Nidhi Vats
- Laboratoire Matière et Systèmes Complexes, UMR 7057, CNRS & Université Paris Diderot, 10 Rue Alice Domon et Léonie Duquet, 75205 Paris cedex 13, France
| | - Claire Wilhelm
- Laboratoire Matière et Systèmes Complexes, UMR 7057, CNRS & Université Paris Diderot, 10 Rue Alice Domon et Léonie Duquet, 75205 Paris cedex 13, France
| | - Pierre-Emmanuel Rautou
- Paris Centre de Recherche Cardiovasculaire, INSERM U970, 56 Rue Leblanc, 75737, Paris cedex 15, France
| | - Marie Poirier-Quinot
- Laboratoire U2R2M, UMR8081, CNRS & Université Paris-Sud, Centre d’Orsay, 91405, Orsay cedex, France
| | - Christine Péchoux
- Centre de Microscopie Électronique, Plateforme MIMA2, INRA, UR1196 Génomique et Physiologie de la Lactation, Domaine de Vilvert, F-78352 Jouy-en-Josas, France
| | - Cécile Devue
- Paris Centre de Recherche Cardiovasculaire, INSERM U970, 56 Rue Leblanc, 75737, Paris cedex 15, France
| | - Chantal M Boulanger
- Paris Centre de Recherche Cardiovasculaire, INSERM U970, 56 Rue Leblanc, 75737, Paris cedex 15, France
| | - Florence Gazeau
- Laboratoire Matière et Systèmes Complexes, UMR 7057, CNRS & Université Paris Diderot, 10 Rue Alice Domon et Léonie Duquet, 75205 Paris cedex 13, France
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Chapot-Chartier MP, Vinogradov E, Sadovskaya I, Andre G, Mistou MY, Trieu-Cuot P, Furlan S, Bidnenko E, Courtin P, Péchoux C, Hols P, Dufrêne YF, Kulakauskas S. Cell surface of Lactococcus lactis is covered by a protective polysaccharide pellicle. J Biol Chem 2010; 285:10464-71. [PMID: 20106971 DOI: 10.1074/jbc.m109.082958] [Citation(s) in RCA: 133] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
In Gram-positive bacteria, the functional role of surface polysaccharides (PS) that are not of capsular nature remains poorly understood. Here, we report the presence of a novel cell wall PS pellicle on the surface of Lactococcus lactis. Spontaneous PS-negative mutants were selected using semi-liquid growth conditions, and all mutations were mapped in a single chromosomal locus coding for PS biosynthesis. PS molecules were shown to be composed of hexasaccharide phosphate repeating units that are distinct from other bacterial PS. Using complementary atomic force and transmission electron microscopy techniques, we showed that the PS layer forms an outer pellicle surrounding the cell. Notably, we found that this cell wall layer confers a protective barrier against host phagocytosis by murine macrophages. Altogether, our results suggest that the PS pellicle could represent a new cell envelope structural component of Gram-positive bacteria.
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Rivière C, Lecoeur C, Wilhelm C, Péchoux C, Combrisson H, Yiou R, Gazeau F. The MRI assessment of intraurethrally--delivered muscle precursor cells using anionic magnetic nanoparticles. Biomaterials 2009; 30:6920-8. [PMID: 19781763 DOI: 10.1016/j.biomaterials.2009.08.056] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2009] [Accepted: 08/28/2009] [Indexed: 02/04/2023]
Abstract
Autografting of cultured myogenic precursor cells (MPC) is a therapeutic strategy for muscle disorders, including striated urethral sphincter insufficiency. Implantation of myofibers with their satellite cells into the urethra is a recently described method of MPC transfer aimed at generating a new sphincter in incontinent patients. In this study, we magnetically labeled muscle implants with dextran-free anionic iron oxide nanoparticles (AMNP). The aim was to evaluate the biocompatibility of the labeling procedure and its utility for non-invasive MRI follow-up of cell therapy in a female pig model. After adsorption of AMNP to the implant surface, various cell types, including MPC, were magnetically labeled within the implants. Magnetic labeling did not affect cell proliferation or differentiation. Autograft detection in vivo by 0.3-T MRI was possible for up to 1 month. Ex vivo, Perl's, anti-desmin and anti-myosin heavy chain staining confirmed the co-localization of AMNP and regenerated myofibers. AMNP labeling was thus useful for locating myofiber implant autografts in vivo and for ex vivo monitoring of the biology of this cell transfer method.
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Affiliation(s)
- Charlotte Rivière
- Laboratoire Matière et Systèmes Complexes, UMR CNRS 7057, University Paris-Diderot, Bâtiment Condorcet, Case 7056, F-75205 Paris Cedex 13, France.
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Wilhelm C, Lavialle F, Péchoux C, Tatischeff I, Gazeau F. Intracellular trafficking of magnetic nanoparticles to design multifunctional biovesicles. Small 2008; 4:577-582. [PMID: 18383444 DOI: 10.1002/smll.200700523] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Claire Wilhelm
- Laboratoire Matière et Systèmes Complexes (MSC) Université Denis Diderot-Paris 7 CNRS UMR 7057, Bâtiment Condorcet, CC 7056 10 rue Alice Domon et Léonie Duquet, 75205 Paris cedex, France.
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Grigorov B, Décimo D, Smagulova F, Péchoux C, Mougel M, Muriaux D, Darlix JL. Intracellular HIV-1 Gag localization is impaired by mutations in the nucleocapsid zinc fingers. Retrovirology 2007; 4:54. [PMID: 17683545 PMCID: PMC1976323 DOI: 10.1186/1742-4690-4-54] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2007] [Accepted: 08/03/2007] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND The HIV-1 nucleocapsid protein (NC) is formed of two CCHC zinc fingers flanked by highly basic regions. HIV-1 NC plays key roles in virus structure and replication via its nucleic acid binding and chaperoning properties. In fact, NC controls proviral DNA synthesis by reverse transcriptase (RT), gRNA dimerization and packaging, and virion assembly. RESULTS We previously reported a role for the first NC zinc finger in virion structure and replication 1. To investigate the role of both NC zinc fingers in intracellular Gag trafficking, and in virion assembly, we generated series of NC zinc fingers mutations. Results show that all Zinc finger mutations have a negative impact on virion biogenesis and maturation and rendered defective the mutant viruses. The NC zinc finger mutations caused an intracellular accumulation of Gag, which was found either diffuse in the cytoplasm or at the plasma membrane but not associated with endosomal membranes as for wild type Gag. Evidences are also provided showing that the intracellular interactions between NC-mutated Gag and the gRNA were impaired. CONCLUSION These results show that Gag oligomerization mediated by gRNA-NC interactions is required for correct Gag trafficking, and assembly in HIV-1 producing cells and the release of infectious viruses.
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Affiliation(s)
- Boyan Grigorov
- LaboRetro, Unité de virologie humaine INSERM U758, IFR128, ENS, 46 allée d'Italie, 69 364 Lyon, France
| | - Didier Décimo
- LaboRetro, Unité de virologie humaine INSERM U758, IFR128, ENS, 46 allée d'Italie, 69 364 Lyon, France
| | | | - Christine Péchoux
- LaboRetro, Unité de virologie humaine INSERM U758, IFR128, ENS, 46 allée d'Italie, 69 364 Lyon, France
| | | | - Delphine Muriaux
- LaboRetro, Unité de virologie humaine INSERM U758, IFR128, ENS, 46 allée d'Italie, 69 364 Lyon, France
| | - Jean-Luc Darlix
- LaboRetro, Unité de virologie humaine INSERM U758, IFR128, ENS, 46 allée d'Italie, 69 364 Lyon, France
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Chanat E, Aujean E, Balteanu A, Chat S, Coant N, Fontaine ML, Hue-Beauvais C, Péchoux C, Torbati MBM, Pauloin A, Petitbarat M, Devinoy E. [Nuclear organization and expression of milk protein genes]. ACTA ACUST UNITED AC 2007; 200:181-92. [PMID: 17151554 DOI: 10.1051/jbio:2006020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Milk protein gene expression varies during the pregnancy/lactation cycle under the influence of lactogenic hormones which induce the activation of several transcription factors. Beyond this activation modifying the binding properties of these factors to their consensus sequences, their interactions with DNA is regulated by variations of the chromatin structure. In the nuclei of the mammary epithelial cell, the three dimensional organisation of the chromatin loops, located between matrix attachment regions, is now being studied. The main milk components are organised in supramolecular structures. Milk fat globules are made of a triglyceride core enwrapped by a tripartite membrane originating from various intracellular compartments. The caseins, the main milk proteins, form aggregates: the casein micelles. Their gradual aggregation in the secretory pathway is initiated as soon as from the endoplasmic reticulum. The mesostructures of the milk fat globule and of the casein micelle remain to be elucidated. Our goal is to make some progress into the understanding of the molecular and cellular mechanisms involved in the formation of these milk products.
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Affiliation(s)
- Eric Chanat
- Unité Génomique et Physiologie de la Lactation, Institut National de la Recherche Agronomique, Domaine de Vilvert, 78352 Jouy-en-Josas Cedex, France.
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