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Renaud EA, Maupin AJM, Bordat Y, Graindorge A, Berry L, Besteiro S. Iron depletion has different consequences on the growth and survival of Toxoplasma gondii strains. Virulence 2024; 15:2329566. [PMID: 38509723 PMCID: PMC10962585 DOI: 10.1080/21505594.2024.2329566] [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] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 03/07/2024] [Indexed: 03/22/2024] Open
Abstract
Toxoplasma gondii is an obligate intracellular parasite responsible for a pathology called toxoplasmosis, which primarily affects immunocompromised individuals and developing foetuses. The parasite can scavenge essential nutrients from its host to support its growth and survival. Among them, iron is one of the most important elements needed to sustain basic cellular functions as it is involved in a number of key metabolic processes, including oxygen transport, redox balance, and electron transport. We evaluated the effects of an iron chelator on the development of several parasite strains and found that they differed in their ability to tolerate iron depletion. The growth of parasites usually associated with a model of acute toxoplasmosis was strongly affected by iron depletion, whereas cystogenic strains were less sensitive as they were able to convert into persisting developmental forms that are associated with the chronic form of the disease. Ultrastructural and biochemical characterization of the impact of iron depletion on parasites also highlighted striking changes in both their metabolism and that of the host, with a marked accumulation of lipid droplets and perturbation of lipid homoeostasis. Overall, our study demonstrates that although acute iron depletion has an important effect on the growth of T. gondii, it has a more profound impact on actively dividing parasites, whereas less metabolically active parasite forms may be able to avoid some of the most detrimental consequences.
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Affiliation(s)
- Eléa A. Renaud
- LPHI, University Montpellier, Inserm, CNRS, Montpellier, France
| | | | - Yann Bordat
- LPHI, University Montpellier, Inserm, CNRS, Montpellier, France
| | | | - Laurence Berry
- LPHI, University Montpellier, Inserm, CNRS, Montpellier, France
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2
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Hajjar H, Berry L, Wu Y, Touqui L, Vergunst AC, Blanc-Potard AB. Contribution of intramacrophage stages to Pseudomonas aeruginosa infection outcome in zebrafish embryos: insights from mgtC and oprF mutants. Sci Rep 2024; 14:6297. [PMID: 38491095 PMCID: PMC10943088 DOI: 10.1038/s41598-024-56725-8] [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: 10/02/2023] [Accepted: 03/10/2024] [Indexed: 03/18/2024] Open
Abstract
Pseudomonas aeruginosa often colonizes immunocompromised patients, causing acute and chronic infections. This bacterium can reside transiently inside cultured macrophages, but the contribution of the intramacrophic stage during infection remains unclear. MgtC and OprF have been identified as important bacterial factors when P. aeruginosa resides inside cultured macrophages. In this study, we showed that P. aeruginosa mgtC and oprF mutants, particular the latter one, had attenuated virulence in both mouse and zebrafish animal models of acute infection. To further investigate P. aeruginosa pathogenesis in zebrafish at a stage different from acute infection, we monitored bacterial load and visualized fluorescent bacteria in live larvae up to 4 days after infection. Whereas the attenuated phenotype of the oprF mutant was associated with a rapid elimination of bacteria, the mgtC mutant was able to persist at low level, a feature also observed with the wild-type strain in surviving larvae. Interestingly, these persistent bacteria can be visualized in macrophages of zebrafish. In a short-time infection model using a macrophage cell line, electron microscopy revealed that internalized P. aeruginosa wild-type bacteria were either released after macrophage lysis or remained intracellularly, where they were localized in vacuoles or in the cytoplasm. The mgtC mutant could also be detected inside macrophages, but without causing cell damage, whereas the oprF mutant was almost completely eliminated after phagocytosis, or localized in phagolysosomes. Taken together, our results show that the main role of OprF for intramacrophage survival impacts both acute and persistent infection by this bacterium. On the other hand, MgtC plays a clear role in acute infection but is not essential for bacterial persistence, in relation with the finding that the mgtC mutant is not completely eliminated by macrophages.
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Affiliation(s)
- Hélène Hajjar
- Laboratory of Pathogens and Host Immunity (LPHI), Université de Montpellier, CNRS-UMR5294, INSERM, Montpellier, France
| | - Laurence Berry
- Laboratory of Pathogens and Host Immunity (LPHI), Université de Montpellier, CNRS-UMR5294, INSERM, Montpellier, France
| | - Yongzheng Wu
- Institut Pasteur, Université Paris Cité, CNRS UMR3691, Cellular Biology and Microbial Infection Unit, Paris, France
| | - Lhousseine Touqui
- Sorbonne Université, Inserm U938, Centre de Recherche Saint-Antoine (CRSA), Paris, France
- Institut Pasteur, Université de Paris Cité, Mucoviscidose et Bronchopathies Chroniques, Paris, France
| | - Annette C Vergunst
- Bacterial Virulence and Chronic Infections (VBIC), Université de Montpellier, INSERM, U1047, Nîmes, France.
| | - Anne-Béatrice Blanc-Potard
- Laboratory of Pathogens and Host Immunity (LPHI), Université de Montpellier, CNRS-UMR5294, INSERM, Montpellier, France.
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Plumet L, Morsli M, Ahmad-Mansour N, Clavijo-Coppens F, Berry L, Sotto A, Lavigne JP, Costechareyre D, Molle V. Isolation and Characterization of New Bacteriophages against Staphylococcal Clinical Isolates from Diabetic Foot Ulcers. Viruses 2023; 15:2287. [PMID: 38140529 PMCID: PMC10747802 DOI: 10.3390/v15122287] [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] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 11/09/2023] [Accepted: 11/19/2023] [Indexed: 12/24/2023] Open
Abstract
Staphylococcus sp. is the most common bacterial genus in infections related to diabetic foot ulcers (DFUs). The emergence of multidrug-resistant bacteria places a serious burden on public health systems. Phage therapy is an alternative treatment to antibiotics, overcoming the issue of antibiotic resistance. In this study, six phages (SAVM01 to SAVM06) were isolated from effluents and were used against a panel of staphylococcal clinical samples isolated from DFUs. A genomic analysis revealed that the phages belonged to the Herelleviridae family, with sequences similar to those of the Kayvirus genus. No lysogeny-associated genes, known virulence or drug resistance genes were identified in the phage genomes. The phages displayed a strong lytic and antibiofilm activity against DFU clinical isolates, as well as against opportunistic pathogenic coagulase-negative staphylococci. The results presented here suggest that these phages could be effective biocontrol agents against staphylococcal clinical isolates from DFUs.
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Affiliation(s)
- Lucile Plumet
- VBIC, INSERM U1047, University of Montpellier, 34095 Montpellier, France; (L.P.); (N.A.-M.)
| | - Madjid Morsli
- VBIC, INSERM U1047, Department of Microbiology and Hospital Hygiene, University of Montpellier, CHU Nîmes, 30908 Nîmes, France; (M.M.); (J.-P.L.)
| | - Nour Ahmad-Mansour
- VBIC, INSERM U1047, University of Montpellier, 34095 Montpellier, France; (L.P.); (N.A.-M.)
| | | | - Laurence Berry
- Laboratory of Pathogen and Host Immunity, CNRS UMR5294, University of Montpellier, 34095 Montpellier, France;
| | - Albert Sotto
- VBIC, INSERM U1047, Department of Infectious Diseases, University of de Montpellier, CHU Nîmes, 30908 Nîmes, France;
| | - Jean-Philippe Lavigne
- VBIC, INSERM U1047, Department of Microbiology and Hospital Hygiene, University of Montpellier, CHU Nîmes, 30908 Nîmes, France; (M.M.); (J.-P.L.)
| | | | - Virginie Molle
- VBIC, INSERM U1047, University of Montpellier, 34095 Montpellier, France; (L.P.); (N.A.-M.)
- VBIC, INSERM U1047, Department of Microbiology and Hospital Hygiene, University of Montpellier, CHU Nîmes, 30908 Nîmes, France; (M.M.); (J.-P.L.)
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Leon-Icaza SA, Bagayoko S, Vergé R, Iakobachvili N, Ferrand C, Aydogan T, Bernard C, Sanchez Dafun A, Murris-Espin M, Mazières J, Bordignon PJ, Mazères S, Bernes-Lasserre P, Ramé V, Lagarde JM, Marcoux J, Bousquet MP, Chalut C, Guilhot C, Clevers H, Peters PJ, Molle V, Lugo-Villarino G, Cam K, Berry L, Meunier E, Cougoule C. Druggable redox pathways against Mycobacterium abscessus in cystic fibrosis patient-derived airway organoids. PLoS Pathog 2023; 19:e1011559. [PMID: 37619220 PMCID: PMC10449475 DOI: 10.1371/journal.ppat.1011559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 07/13/2023] [Indexed: 08/26/2023] Open
Abstract
Mycobacterium abscessus (Mabs) drives life-shortening mortality in cystic fibrosis (CF) patients, primarily because of its resistance to chemotherapeutic agents. To date, our knowledge on the host and bacterial determinants driving Mabs pathology in CF patient lung remains rudimentary. Here, we used human airway organoids (AOs) microinjected with smooth (S) or rough (R-)Mabs to evaluate bacteria fitness, host responses to infection, and new treatment efficacy. We show that S Mabs formed biofilm, and R Mabs formed cord serpentines and displayed a higher virulence. While Mabs infection triggers enhanced oxidative stress, pharmacological activation of antioxidant pathways resulted in better control of Mabs growth and reduced virulence. Genetic and pharmacological inhibition of the CFTR is associated with better growth and higher virulence of S and R Mabs. Finally, pharmacological activation of antioxidant pathways inhibited Mabs growth, at least in part through the quinone oxidoreductase NQO1, and improved efficacy in combination with cefoxitin, a first line antibiotic. In conclusion, we have established AOs as a suitable human system to decipher mechanisms of CF-driven respiratory infection by Mabs and propose boosting of the NRF2-NQO1 axis as a potential host-directed strategy to improve Mabs infection control.
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Affiliation(s)
- Stephen Adonai Leon-Icaza
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III–Paul Sabatier (UPS), Toulouse, France
| | - Salimata Bagayoko
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III–Paul Sabatier (UPS), Toulouse, France
| | - Romain Vergé
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III–Paul Sabatier (UPS), Toulouse, France
| | - Nino Iakobachvili
- M4i Nanoscopy Division, Maastricht University, Maastricht, Netherlands
| | - Chloé Ferrand
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III–Paul Sabatier (UPS), Toulouse, France
| | - Talip Aydogan
- Laboratory of Pathogen Host Interactions (LPHI), Université Montpellier, CNRS, Montpellier, France
| | - Célia Bernard
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III–Paul Sabatier (UPS), Toulouse, France
| | - Angelique Sanchez Dafun
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III–Paul Sabatier (UPS), Toulouse, France
| | - Marlène Murris-Espin
- Service de Pneumologie, Hôpital Larrey, CHU de Toulouse, Toulouse, France
- Centre de ressource et de compétence pour la mucoviscidose de l’adulte (CRCM adulte), CHU de Toulouse, Toulouse, France
| | - Julien Mazières
- Service de Pneumologie, Hôpital Larrey, CHU de Toulouse, Toulouse, France
| | - Pierre Jean Bordignon
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III–Paul Sabatier (UPS), Toulouse, France
| | - Serge Mazères
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III–Paul Sabatier (UPS), Toulouse, France
| | | | - Victoria Ramé
- Imactiv-3D SAS, 1 Place Pierre POTIER, Toulouse, France
| | | | - Julien Marcoux
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III–Paul Sabatier (UPS), Toulouse, France
| | - Marie-Pierre Bousquet
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III–Paul Sabatier (UPS), Toulouse, France
| | - Christian Chalut
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III–Paul Sabatier (UPS), Toulouse, France
| | - Christophe Guilhot
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III–Paul Sabatier (UPS), Toulouse, France
| | - Hans Clevers
- Oncode Institute, Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences and University Medical Center, Utrecht, Netherlands
| | - Peter J. Peters
- M4i Nanoscopy Division, Maastricht University, Maastricht, Netherlands
| | - Virginie Molle
- Laboratory of Pathogen Host Interactions (LPHI), Université Montpellier, CNRS, Montpellier, France
| | - Geanncarlo Lugo-Villarino
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III–Paul Sabatier (UPS), Toulouse, France
| | - Kaymeuang Cam
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III–Paul Sabatier (UPS), Toulouse, France
| | - Laurence Berry
- Laboratory of Pathogen Host Interactions (LPHI), Université Montpellier, CNRS, Montpellier, France
| | - Etienne Meunier
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III–Paul Sabatier (UPS), Toulouse, France
| | - Céline Cougoule
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III–Paul Sabatier (UPS), Toulouse, France
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5
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Berry L, Truchet G, Bonaccorsi T. Accelerated Monte Carlo perturbation calculation by surface recovery. ANN NUCL ENERGY 2023. [DOI: 10.1016/j.anucene.2023.109716] [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: 02/07/2023]
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6
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Lohia R, Allegrini B, Berry L, Guizouarn H, Cerdan R, Abkarian M, Douguet D, Honoré E, Wengelnik K. Pharmacological activation of PIEZO1 in human red blood cells prevents Plasmodium falciparum invasion. Cell Mol Life Sci 2023; 80:124. [PMID: 37071200 PMCID: PMC10113305 DOI: 10.1007/s00018-023-04773-0] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 03/30/2023] [Indexed: 04/19/2023]
Abstract
An inherited gain-of-function variant (E756del) in the mechanosensitive cationic channel PIEZO1 was shown to confer a significant protection against severe malaria. Here, we demonstrate in vitro that human red blood cell (RBC) infection by Plasmodium falciparum is prevented by the pharmacological activation of PIEZO1. Yoda1 causes an increase in intracellular calcium associated with rapid echinocytosis that inhibits RBC invasion, without affecting parasite intraerythrocytic growth, division or egress. Notably, Yoda1 treatment significantly decreases merozoite attachment and subsequent RBC deformation. Intracellular Na+/K+ imbalance is unrelated to the mechanism of protection, although delayed RBC dehydration observed in the standard parasite culture medium RPMI/albumax further enhances the resistance to malaria conferred by Yoda1. The chemically unrelated Jedi2 PIEZO1 activator similarly causes echinocytosis and RBC dehydration associated with resistance to malaria invasion. Spiky outward membrane projections are anticipated to reduce the effective surface area required for both merozoite attachment and internalization upon pharmacological activation of PIEZO1. Globally, our findings indicate that the loss of the typical biconcave discoid shape of RBCs, together with an altered optimal surface to volume ratio, induced by PIEZO1 pharmacological activation prevent efficient P. falciparum invasion.
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Affiliation(s)
- Rakhee Lohia
- LPHI, University of Montpellier, CNRS UMR5294, Montpellier, France
| | | | - Laurence Berry
- LPHI, University of Montpellier, CNRS UMR5294, Montpellier, France
| | | | - Rachel Cerdan
- LPHI, University of Montpellier, CNRS UMR5294, Montpellier, France
| | - Manouk Abkarian
- Centre de Biologie Structurale, CNRS UMR5048, INSERM U1054, University of Montpellier, Montpellier, France
| | - Dominique Douguet
- IPMC, University Côte d'Azur, CNRS, INSERM, UMR7275, Labex ICST, Valbonne, France
| | - Eric Honoré
- IPMC, University Côte d'Azur, CNRS, INSERM, UMR7275, Labex ICST, Valbonne, France.
| | - Kai Wengelnik
- LPHI, University of Montpellier, CNRS UMR5294, INSERM, Montpellier, France.
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7
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Guérin A, Strelau KM, Barylyuk K, Wallbank BA, Berry L, Crook OM, Lilley KS, Waller RF, Striepen B. Cryptosporidium uses multiple distinct secretory organelles to interact with and modify its host cell. Cell Host Microbe 2023; 31:650-664.e6. [PMID: 36958336 DOI: 10.1016/j.chom.2023.03.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [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: 11/25/2022] [Revised: 02/09/2023] [Accepted: 02/28/2023] [Indexed: 03/25/2023]
Abstract
Cryptosporidium is a leading cause of diarrheal disease in children and an important contributor to early childhood mortality. The parasite invades and extensively remodels intestinal epithelial cells, building an elaborate interface structure. How this occurs at the molecular level and the contributing parasite factors are largely unknown. Here, we generated a whole-cell spatial proteome of the Cryptosporidium sporozoite and used genetic and cell biological experimentation to discover the Cryptosporidium-secreted effector proteome. These findings reveal multiple organelles, including an original secretory organelle, and generate numerous compartment markers by tagging native gene loci. We show that secreted proteins are delivered to the parasite-host interface, where they assemble into different structures including a ring that anchors the parasite into its unique epicellular niche. Cryptosporidium thus uses a complex set of secretion systems during and following invasion that act in concert to subjugate its host cell.
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Affiliation(s)
- Amandine Guérin
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Katherine M Strelau
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | | | - Bethan A Wallbank
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Laurence Berry
- LPHI, CNRS, Université de Montpellier, Montpellier 34095, France
| | - Oliver M Crook
- Department of Statistics, University of Oxford, Oxford OX1 3LB, UK
| | - Kathryn S Lilley
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1QW, UK
| | - Ross F Waller
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1QW, UK
| | - Boris Striepen
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
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Lin EY, Hsu CY, Chiou JF, Berry L, Horn L, Bunn P, Yang JH, Yang PC, Adjei A, Shyr Y. EP08.01-028 Overestimation with Cox HR - Cox-TEL-Adjusted Associations of PD-L1 Expression with Immune Checkpoint Inhibitor Survival Benefit in Lung Cancer. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.600] [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: 11/29/2022]
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9
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Ling K, Garratt L, Berry L, Kicic A, Stick S. 436: Effects of rhinovirus on airway-associated mucins in young children with cystic fibrosis. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01860-9] [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: 11/24/2022]
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10
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Parente C, Montgomery R, Berry L, Mahida N. Impact of universal mask wearing in reducing healthcare-associated respiratory virus infections in haematology patients. J Hosp Infect 2021; 119:192-193. [PMID: 34757036 DOI: 10.1016/j.jhin.2021.10.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 10/25/2021] [Indexed: 11/19/2022]
Affiliation(s)
- C Parente
- Department of Clinical Microbiology, Queens Medical Centre, Nottingham University Hospitals, Nottingham, UK
| | - R Montgomery
- Infection Prevention and Control Department, Nottingham City Hospital, Nottingham University Hospitals, Nottingham, UK
| | - L Berry
- Department of Clinical Virology, Queens Medical Centre, Nottingham University Hospitals, Nottingham, UK
| | - N Mahida
- Department of Clinical Microbiology, Queens Medical Centre, Nottingham University Hospitals, Nottingham, UK.
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Guérin A, Roy NH, Kugler EM, Berry L, Burkhardt JK, Shin JB, Striepen B. Cryptosporidium rhoptry effector protein ROP1 injected during invasion targets the host cytoskeletal modulator LMO7. Cell Host Microbe 2021; 29:1407-1420.e5. [PMID: 34348092 PMCID: PMC8475647 DOI: 10.1016/j.chom.2021.07.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [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: 03/30/2021] [Revised: 05/19/2021] [Accepted: 07/02/2021] [Indexed: 12/30/2022]
Abstract
The parasite Cryptosporidium invades and replicates in intestinal epithelial cells and is a leading cause of diarrheal disease and early childhood mortality. The molecular mechanisms that underlie infection and pathogenesis are largely unknown. Here, we delineate the events of host cell invasion and uncover a mechanism unique to Cryptosporidium. We developed a screen to identify parasite effectors, finding the injection of multiple parasite proteins into the host from the rhoptry organelle. These factors are targeted to diverse locations within the host cell and its interface with the parasite. One identified effector, rhoptry protein 1 (ROP1), accumulates in the terminal web of enterocytes through direct interaction with the host protein LIM domain only 7 (LMO7) an organizer of epithelial cell polarity and cell-cell adhesion. Genetic ablation of LMO7 or ROP1 in mice or parasites, respectively, impacts parasite burden in vivo in opposite ways. Taken together, these data provide molecular insight into how Cryptosporidium manipulates its intestinal host niche.
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Affiliation(s)
- Amandine Guérin
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Nathan H Roy
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia and University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Emily M Kugler
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Laurence Berry
- LPHI, CNRS, Université de Montpellier, Montpellier 34095, France
| | - Janis K Burkhardt
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia and University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Jung-Bum Shin
- Department of Neuroscience, University of Virginia, Charlottesville, VA 22908, USA
| | - Boris Striepen
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
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Corrales RM, Vaselek S, Neish R, Berry L, Brunet CD, Crobu L, Kuk N, Mateos-Langerak J, Robinson DR, Volf P, Mottram JC, Sterkers Y, Bastien P. The kinesin of the flagellum attachment zone in Leishmania is required for cell morphogenesis, cell division and virulence in the mammalian host. PLoS Pathog 2021; 17:e1009666. [PMID: 34143858 PMCID: PMC8244899 DOI: 10.1371/journal.ppat.1009666] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 01/13/2021] [Revised: 06/30/2021] [Accepted: 05/24/2021] [Indexed: 11/20/2022] Open
Abstract
Leishmania parasites possess a unique and complex cytoskeletal structure termed flagellum attachment zone (FAZ) connecting the base of the flagellum to one side of the flagellar pocket (FP), an invagination of the cell body membrane and the sole site for endocytosis and exocytosis. This structure is involved in FP architecture and cell morphogenesis, but its precise role and molecular composition remain enigmatic. Here, we characterized Leishmania FAZ7, the only known FAZ protein containing a kinesin motor domain, and part of a clade of trypanosomatid-specific kinesins with unknown functions. The two paralogs of FAZ7, FAZ7A and FAZ7B, display different localizations and functions. FAZ7A localizes at the basal body, while FAZ7B localizes at the distal part of the FP, where the FAZ structure is present in Leishmania. While null mutants of FAZ7A displayed normal growth rates, the deletion of FAZ7B impaired cell growth in both promastigotes and amastigotes of Leishmania. The kinesin activity is crucial for its function. Deletion of FAZ7B resulted in altered cell division, cell morphogenesis (including flagellum length), and FP structure and function. Furthermore, knocking out FAZ7B induced a mis-localization of two of the FAZ proteins, and disrupted the molecular organization of the FP collar, affecting the localization of its components. Loss of the kinesin FAZ7B has important consequences in the insect vector and mammalian host by reducing proliferation in the sand fly and pathogenicity in mice. Our findings reveal the pivotal role of the only FAZ kinesin as part of the factors important for a successful life cycle of Leishmania. Leishmania are flagellated trypanosomatid parasites causing worldwide human and animal diseases. As ’divergent eukaryotes’, their biology presents unique features and structures, of which the specific functions constitute potential drug targets. Among others, they possess a unique cytoskeletal structure termed the flagellum attachment zone (FAZ) attaching the base of their flagellum to one side of the flagellar pocket (FP), which is the sole site for endocytosis and exocytosis. The FP together with other unique flagellum-associated structures are crucial for parasite survival, but the functioning of this whole remains largely enigmatic. Leishmania also possess an expanded repertoire of kinesins (>55), including two trypanosomatid-specific families. Here, we show that the deletion of the sole kinesin among FAZ proteins disrupts cell morphogenesis, FP organisation and cell division. Furthermore, the ability to proliferate in the insect vector and mammalian host is reduced in parasites lacking the kinesin FAZ7B. This study helps elucidate the factors contributing to the successful lifecycle and pathogenicity of the parasite. It also highlights the functional diversification of motor proteins during evolution.
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Affiliation(s)
- Rosa Milagros Corrales
- Research Unit “MiVEGEC”, University of Montpellier, CNRS, IRD, Academic Hospital (CHU) of Montpellier, Montpellier, France
- * E-mail: (RMC); (PB)
| | - Slavica Vaselek
- Department of Parasitology, Charles University, Prague, Czech Republic
| | - Rachel Neish
- York Biomedical Research Institute and Department of Biology, University of York, York, United Kingdom
| | - Laurence Berry
- Research Unit “LPHI” (Laboratory of Pathogen Host Interactions), University of Montpellier, CNRS, Montpellier, France
| | - Camille D. Brunet
- Research Unit “MiVEGEC”, University of Montpellier, CNRS, IRD, Academic Hospital (CHU) of Montpellier, Montpellier, France
| | - Lucien Crobu
- Research Unit “MiVEGEC”, University of Montpellier, CNRS, IRD, Academic Hospital (CHU) of Montpellier, Montpellier, France
| | - Nada Kuk
- Research Unit “MiVEGEC”, University of Montpellier, CNRS, IRD, Academic Hospital (CHU) of Montpellier, Montpellier, France
| | | | - Derrick R. Robinson
- Research Unit “Fundamental Microbiology and Pathogenicity”, “Protist Parasite Cytoskeleton (ProParaCyto)”, University of Bordeaux, UMR 5234, CNRS, Bordeaux, France
| | - Petr Volf
- Department of Parasitology, Charles University, Prague, Czech Republic
| | - Jeremy C. Mottram
- York Biomedical Research Institute and Department of Biology, University of York, York, United Kingdom
| | - Yvon Sterkers
- Research Unit “MiVEGEC”, University of Montpellier, CNRS, IRD, Academic Hospital (CHU) of Montpellier, Montpellier, France
| | - Patrick Bastien
- Research Unit “MiVEGEC”, University of Montpellier, CNRS, IRD, Academic Hospital (CHU) of Montpellier, Montpellier, France
- * E-mail: (RMC); (PB)
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13
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Dass S, Shunmugam S, Berry L, Arnold CS, Katris NJ, Duley S, Pierrel F, Cesbron-Delauw MF, Yamaryo-Botté Y, Botté CY. Toxoplasma LIPIN is essential in channeling host lipid fluxes through membrane biogenesis and lipid storage. Nat Commun 2021; 12:2813. [PMID: 34001876 PMCID: PMC8129101 DOI: 10.1038/s41467-021-22956-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [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: 02/19/2020] [Accepted: 03/24/2021] [Indexed: 01/20/2023] Open
Abstract
Apicomplexa are obligate intracellular parasites responsible for major human diseases. Their intracellular survival relies on intense lipid synthesis, which fuels membrane biogenesis. Parasite lipids are generated as an essential combination of fatty acids scavenged from the host and de novo synthesized within the parasite apicoplast. The molecular and metabolic mechanisms allowing regulation and channeling of these fatty acid fluxes for intracellular parasite survival are currently unknown. Here, we identify an essential phosphatidic acid phosphatase in Toxoplasma gondii, TgLIPIN, as the central metabolic nexus responsible for controlled lipid synthesis sustaining parasite development. Lipidomics reveal that TgLIPIN controls the synthesis of diacylglycerol and levels of phosphatidic acid that regulates the fine balance of lipids between storage and membrane biogenesis. Using fluxomic approaches, we uncover the first parasite host-scavenged lipidome and show that TgLIPIN prevents parasite death by 'lipotoxicity' through effective channeling of host-scavenged fatty acids to storage triacylglycerols and membrane phospholipids.
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Affiliation(s)
- Sheena Dass
- Apicolipid Team, Institute for Advanced Biosciences, CNRS UMR5309, Université Grenoble Alpes, INSERM U1209, Grenoble, France
| | - Serena Shunmugam
- Apicolipid Team, Institute for Advanced Biosciences, CNRS UMR5309, Université Grenoble Alpes, INSERM U1209, Grenoble, France
| | - Laurence Berry
- Laboratory of Pathogen Host Interactions, UMR 5235, Université de Montpellier, Montpellier, France
| | - Christophe-Sebastien Arnold
- Apicolipid Team, Institute for Advanced Biosciences, CNRS UMR5309, Université Grenoble Alpes, INSERM U1209, Grenoble, France
| | - Nicholas J Katris
- Apicolipid Team, Institute for Advanced Biosciences, CNRS UMR5309, Université Grenoble Alpes, INSERM U1209, Grenoble, France
| | - Samuel Duley
- Apicolipid Team, Institute for Advanced Biosciences, CNRS UMR5309, Université Grenoble Alpes, INSERM U1209, Grenoble, France
| | - Fabien Pierrel
- Université Grenoble Alpes, CNRS, Grenoble INP, TIMC-IMAG, Grenoble, France
| | - Marie-France Cesbron-Delauw
- Apicolipid Team, Institute for Advanced Biosciences, CNRS UMR5309, Université Grenoble Alpes, INSERM U1209, Grenoble, France
| | - Yoshiki Yamaryo-Botté
- Apicolipid Team, Institute for Advanced Biosciences, CNRS UMR5309, Université Grenoble Alpes, INSERM U1209, Grenoble, France.
| | - Cyrille Y Botté
- Apicolipid Team, Institute for Advanced Biosciences, CNRS UMR5309, Université Grenoble Alpes, INSERM U1209, Grenoble, France.
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14
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Robbins T, Berry L, Wells F, Randeva H, Laird S. Healthcare staff perceptions towards influenza and potential COVID-19 vaccination in the 2020 pandemic context. J Hosp Infect 2021; 112:45-48. [PMID: 33746009 PMCID: PMC7973053 DOI: 10.1016/j.jhin.2021.02.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 12/10/2020] [Revised: 02/22/2021] [Accepted: 02/22/2021] [Indexed: 12/04/2022]
Abstract
The COVID-19 pandemic generated renewed focus on infectious disease transmission in healthcare settings. This study aimed to evaluate staff perceptions towards influenza vaccination in the COVID-19 context. All healthcare workers within a major UK tertiary referral hospital were invited to answer a survey conducted from September 2nd to 13th, 2020. In all, 593 responses were received across a spectrum of roles; 44% reported they were more likely to get an influenza vaccine this year due to COVID-19; however, 10% felt that an influenza vaccine was less important due to social distancing. Additional questions evaluated intention to receive COVID-19 vaccination. There were substantial differences of opinion between staff groups.
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Affiliation(s)
- T Robbins
- University Hospitals Coventry & Warwickshire NHS Trust, Coventry, UK; Institute of Digital Healthcare, WMG, University of Warwick, Coventry, UK
| | - L Berry
- University Hospitals Coventry & Warwickshire NHS Trust, Coventry, UK
| | - F Wells
- University Hospitals Coventry & Warwickshire NHS Trust, Coventry, UK
| | - H Randeva
- University Hospitals Coventry & Warwickshire NHS Trust, Coventry, UK; Warwick Medical School, University of Warwick, Coventry, UK
| | - S Laird
- University Hospitals Coventry & Warwickshire NHS Trust, Coventry, UK; Warwick Medical School, University of Warwick, Coventry, UK.
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15
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Padda S, Whisenant J, Neal J, York S, Iams W, Neuss M, Reckamp K, Preiss J, Berry L, Shyr Y, Wakelee H, Horn L. P76.85 Afatinib and Necitumumab in EGFR mutant NSCLC with Acquired Resistance to 1st or 3rd Generation EGFR Tyrosine Kinase Inhibitors. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.1142] [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: 10/21/2022]
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16
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Moussouni M, Berry L, Sipka T, Nguyen-Chi M, Blanc-Potard AB. Pseudomonas aeruginosa OprF plays a role in resistance to macrophage clearance during acute infection. Sci Rep 2021; 11:359. [PMID: 33432030 PMCID: PMC7801371 DOI: 10.1038/s41598-020-79678-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 09/16/2020] [Accepted: 12/11/2020] [Indexed: 12/14/2022] Open
Abstract
While considered an extracellular pathogen, Pseudomonas aeruginosa has been reported to be engulfed by macrophages in cellular and animal models. However, the role of macrophages in P. aeruginosa clearance in vivo remains poorly studied. The major outer membrane porin OprF has been recently shown to be involved in P. aeruginosa fate within cultured macrophages and analysis of an oprF mutant may thus provide insights to better understand the relevance of this intramacrophage stage during infection. In the present study, we investigated for the first time the virulence of a P. aeruginosa oprF mutant in a vertebrate model that harbors functional macrophages, the zebrafish (Danio rerio) embryo, which offers powerful tools to address macrophage–pathogen interactions. We established that P. aeruginosa oprF mutant is attenuated in zebrafish embryos in a macrophage-dependent manner. Visualization and quantification of P. aeruginosa bacteria phagocytosed by macrophages after injection into closed cavities suggested that the attenuated phenotype of oprF mutant is not linked to higher macrophage recruitment nor better phagocytosis than wild-type strain. Using cultured macrophages, we showed an intramacrophage survival defect of P. aeruginosa oprF mutant, which is correlated with elevated association of bacteria with acidic compartments. Notably, treatment of embryos with bafilomycin, an inhibitor of acidification, increased the sensibility of embryos towards both wild-type and oprF mutant, and partially suppressed the attenuation of oprF mutant. Taken together, this work supports zebrafish embryo as state-of-the-art model to address in vivo the relevance of P. aeruginosa intramacrophage stage. Our results highlight the contribution of macrophages in the clearance of P. aeruginosa during acute infection and suggest that OprF protects P. aeruginosa against macrophage clearance by avoiding bacterial elimination in acidified phagosomes.
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Affiliation(s)
- Malika Moussouni
- Laboratory of Pathogen-Host Interactions (LPHI), CNRS-UMR5235, Université de Montpellier, Montpellier, France
| | - Laurence Berry
- Laboratory of Pathogen-Host Interactions (LPHI), CNRS-UMR5235, Université de Montpellier, Montpellier, France
| | - Tamara Sipka
- Laboratory of Pathogen-Host Interactions (LPHI), CNRS-UMR5235, Université de Montpellier, Montpellier, France
| | - Mai Nguyen-Chi
- Laboratory of Pathogen-Host Interactions (LPHI), CNRS-UMR5235, Université de Montpellier, Montpellier, France
| | - Anne-Béatrice Blanc-Potard
- Laboratory of Pathogen-Host Interactions (LPHI), CNRS-UMR5235, Université de Montpellier, Montpellier, France.
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17
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Paul AS, Miliu A, Paulo JA, Goldberg JM, Bonilla AM, Berry L, Seveno M, Braun-Breton C, Kosber AL, Elsworth B, Arriola JSN, Lebrun M, Gygi SP, Lamarque MH, Duraisingh MT. Co-option of Plasmodium falciparum PP1 for egress from host erythrocytes. Nat Commun 2020; 11:3532. [PMID: 32669539 PMCID: PMC7363832 DOI: 10.1038/s41467-020-17306-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 06/19/2020] [Indexed: 12/20/2022] Open
Abstract
Asexual proliferation of the Plasmodium parasites that cause malaria follows a developmental program that alternates non-canonical intraerythrocytic replication with dissemination to new host cells. We carried out a functional analysis of the Plasmodium falciparum homolog of Protein Phosphatase 1 (PfPP1), a universally conserved cell cycle factor in eukaryotes, to investigate regulation of parasite proliferation. PfPP1 is indeed required for efficient replication, but is absolutely essential for egress of parasites from host red blood cells. By phosphoproteomic and chemical-genetic analysis, we isolate two functional targets of PfPP1 for egress: a HECT E3 protein-ubiquitin ligase; and GCα, a fusion protein composed of a guanylyl cyclase and a phospholipid transporter domain. We hypothesize that PfPP1 regulates lipid sensing by GCα and find that phosphatidylcholine stimulates PfPP1-dependent egress. PfPP1 acts as a key regulator that integrates multiple cell-intrinsic pathways with external signals to direct parasite egress from host cells.
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Affiliation(s)
- Aditya S Paul
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, 02115, MA, USA
| | - Alexandra Miliu
- Laboratory of Pathogen Host Interaction (LPHI), UMR5235, Centre National de la Recherche Scientifique (CNRS), Université de Montpellier, 34095, Montpellier, France
| | - Joao A Paulo
- Department of Cell Biology, Harvard Medical School, Boston, 02115, MA, USA
| | - Jonathan M Goldberg
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, 02115, MA, USA
| | - Arianna M Bonilla
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, 02115, MA, USA
| | - Laurence Berry
- Laboratory of Pathogen Host Interaction (LPHI), UMR5235, Centre National de la Recherche Scientifique (CNRS), Université de Montpellier, 34095, Montpellier, France
| | - Marie Seveno
- Laboratory of Pathogen Host Interaction (LPHI), UMR5235, Centre National de la Recherche Scientifique (CNRS), Université de Montpellier, 34095, Montpellier, France
| | - Catherine Braun-Breton
- Laboratory of Pathogen Host Interaction (LPHI), UMR5235, Centre National de la Recherche Scientifique (CNRS), Université de Montpellier, 34095, Montpellier, France
| | - Aziz L Kosber
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, 02115, MA, USA
| | - Brendan Elsworth
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, 02115, MA, USA
| | - Jose S N Arriola
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, 02115, MA, USA
| | - Maryse Lebrun
- Laboratory of Pathogen Host Interaction (LPHI), UMR5235, Centre National de la Recherche Scientifique (CNRS), Université de Montpellier, 34095, Montpellier, France
| | - Steven P Gygi
- Department of Cell Biology, Harvard Medical School, Boston, 02115, MA, USA
| | - Mauld H Lamarque
- Laboratory of Pathogen Host Interaction (LPHI), UMR5235, Centre National de la Recherche Scientifique (CNRS), Université de Montpellier, 34095, Montpellier, France.
| | - Manoj T Duraisingh
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, 02115, MA, USA.
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18
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Yagoubat A, Crobu L, Berry L, Kuk N, Lefebvre M, Sarrazin A, Bastien P, Sterkers Y. Universal highly efficient conditional knockout system in
Leishmania
, with a focus on untranscribed region preservation. Cell Microbiol 2020; 22:e13159. [DOI: 10.1111/cmi.13159] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 12/24/2019] [Accepted: 12/27/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Akila Yagoubat
- MiVEGECUniversity of Montpellier, CNRS, IRD, CHU Montpellier France
| | - Lucien Crobu
- MiVEGECUniversity of Montpellier, CNRS, IRD, CHU Montpellier France
| | - Laurence Berry
- Laboratory of Pathogen Host Interactions, Microscopie Electronique et Analytique, CNRSUniversity of Montpellier Montpellier France
| | - Nada Kuk
- MiVEGECUniversity of Montpellier, CNRS, IRD, CHU Montpellier France
| | - Michèle Lefebvre
- MiVEGECUniversity of Montpellier, CNRS, IRD, CHU Montpellier France
| | - Amélie Sarrazin
- Montpellier RIO Imaging Facility, Montpellier BIOCAMPUSUniversity of Montpellier, Arnaud de Villeneuve Campus Imaging Facility‐Institut de Génétique Humaine‐CNRS Montpellier France
| | - Patrick Bastien
- MiVEGECUniversity of Montpellier, CNRS, IRD, CHU Montpellier France
| | - Yvon Sterkers
- MiVEGECUniversity of Montpellier, CNRS, IRD, CHU Montpellier France
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19
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Semenovskaya K, Lévêque MF, Berry L, Bordat Y, Dubremetz JF, Lebrun M, Besteiro S. TgZFP2 is a novel zinc finger protein involved in coordinating mitosis and budding in Toxoplasma. Cell Microbiol 2019; 22:e13120. [PMID: 31628778 DOI: 10.1111/cmi.13120] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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: 06/09/2019] [Revised: 09/09/2019] [Accepted: 09/23/2019] [Indexed: 12/13/2022]
Abstract
Zinc finger proteins (ZFPs) are one of the most abundant groups of proteins with a wide range of molecular functions. We have characterised a Toxoplasma protein that we named TgZFP2, as it bears a zinc finger domain conserved in eukaryotes. However, this protein has little homology outside this region and contains no other conserved domain that could hint for a particular function. We thus investigated TgZFP2 function by generating a conditional mutant. We showed that depletion of TgZFP2 leads to a drastic arrest in the parasite cell cycle, and complementation assays demonstrated the zinc finger domain is essential for TgZFP2 function. More precisely, whereas replication of the nuclear material is initially essentially unaltered, daughter cell budding is seriously impaired: to a large extent newly formed buds fail to incorporate nuclear material. TgZFP2 is found at the basal complex in extracellular parasites and after invasion, but as the parasites progress into cell division, it relocalises to cytoplasmic punctate structures and, strikingly, accumulates in the pericentrosomal area at the onset of daughter cell elongation. Centrosomes have emerged as major coordinators of the budding and nuclear cycles in Toxoplasma, and our study identifies a novel and important component of this machinery.
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Affiliation(s)
- Ksenia Semenovskaya
- Laboratory of Pathogen Host Interactions UMR5235, CNRS, Université de Montpellier, Montpellier, France
| | - Maude F Lévêque
- Laboratory of Pathogen Host Interactions UMR5235, CNRS, Université de Montpellier, Montpellier, France.,MiVEGEC, Université de Montpellier, CNRS, IRD, CHU de Montpellier, Montpellier, France
| | - Laurence Berry
- Laboratory of Pathogen Host Interactions UMR5235, CNRS, Université de Montpellier, Montpellier, France
| | - Yann Bordat
- Laboratory of Pathogen Host Interactions UMR5235, CNRS, Université de Montpellier, Montpellier, France
| | - Jean-François Dubremetz
- Laboratory of Pathogen Host Interactions UMR5235, CNRS, Université de Montpellier, Montpellier, France
| | - Maryse Lebrun
- Laboratory of Pathogen Host Interactions UMR5235, CNRS, Université de Montpellier, Montpellier, France
| | - Sébastien Besteiro
- Laboratory of Pathogen Host Interactions UMR5235, CNRS, Université de Montpellier, Montpellier, France
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20
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Whisenant J, Beckermann K, Borghaei H, Owonikoko T, Patel J, Berry L, Shyr Y, Harrow K, Liang C, Holzhausen A, Selvaggi G, Wakelee H, Horn L. P1.04-17 Phase I/II Study of Nivolumab and Vorolanib in Patients with Refractory Thoracic Tumors. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.920] [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: 10/25/2022]
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21
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Berry L, Palmer T, Wells F, Williams E, Sibal B, Timms J. Nosocomial outbreak of measles amongst a highly vaccinated population in an English hospital setting. Infect Prev Pract 2019; 1:100018. [PMID: 34368679 PMCID: PMC8336304 DOI: 10.1016/j.infpip.2019.100018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 07/02/2019] [Accepted: 08/06/2019] [Indexed: 12/04/2022] Open
Abstract
In May 2017 a patient attended the emergency department at a hospital in England, with a presumed allergic reaction. He was subsequently diagnosed with measles. There were seven further confirmed cases, five of whom had received two doses of MMR vaccine. This outbreak highlights the importance of not relying on vaccination status to rule out the diagnosis of measles. Epidemiological investigations of this outbreak were particularly challenging due to the highly infectious nature of the measles virus, and prevented full elucidation of either the source of this outbreak or the transmission pathways.
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Affiliation(s)
- L Berry
- University Hospital Coventry and Warwickshire NHS Trust Coventry, United Kingdom
| | - T Palmer
- Communicable Disease Control, West Midlands Health Protection Team, Public Health England, Birmingham, United Kingdom
| | - F Wells
- Infection prevention and control, University Hospital Coventry and Warwickshire NHS Trust, United Kingdom
| | - E Williams
- Coventry & Warwickshire Occupational Health Shared Service, University Hospitals Coventry and Warwickshire NHS Trust, United Kingdom
| | - B Sibal
- Communicable Disease Control, West Midlands Health Protection Team, Public Health England, Birmingham, United Kingdom
| | - J Timms
- Department of Virology and Molecular Pathology, Coventry and Warwickshire Pathology Services, University Hospital Coventry and Warwickshire NHS Trust, United Kingdom
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22
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Garai P, Berry L, Moussouni M, Bleves S, Blanc-Potard AB. Killing from the inside: Intracellular role of T3SS in the fate of Pseudomonas aeruginosa within macrophages revealed by mgtC and oprF mutants. PLoS Pathog 2019; 15:e1007812. [PMID: 31220187 PMCID: PMC6586356 DOI: 10.1371/journal.ppat.1007812] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [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: 01/18/2019] [Accepted: 05/02/2019] [Indexed: 12/19/2022] Open
Abstract
While considered solely an extracellular pathogen, increasing evidence indicates that Pseudomonas aeruginosa encounters intracellular environment in diverse mammalian cell types, including macrophages. In the present study, we have deciphered the intramacrophage fate of wild-type P. aeruginosa PAO1 strain by live and electron microscopy. P. aeruginosa first resided in phagosomal vacuoles and subsequently could be detected in the cytoplasm, indicating phagosomal escape of the pathogen, a finding also supported by vacuolar rupture assay. The intracellular bacteria could eventually induce cell lysis, both in a macrophage cell line and primary human macrophages. Two bacterial factors, MgtC and OprF, recently identified to be important for survival of P. aeruginosa in macrophages, were found to be involved in bacterial escape from the phagosome as well as in cell lysis caused by intracellular bacteria. Strikingly, type III secretion system (T3SS) genes of P. aeruginosa were down-regulated within macrophages in both mgtC and oprF mutants. Concordantly, cyclic di-GMP (c-di-GMP) level was increased in both mutants, providing a clue for negative regulation of T3SS inside macrophages. Consistent with the phenotypes and gene expression pattern of mgtC and oprF mutants, a T3SS mutant (ΔpscN) exhibited defect in phagosomal escape and macrophage lysis driven by internalized bacteria. Importantly, these effects appeared to be largely dependent on the ExoS effector, in contrast with the known T3SS-dependent, but ExoS independent, cytotoxicity caused by extracellular P. aeruginosa towards macrophages. Moreover, this macrophage damage caused by intracellular P. aeruginosa was found to be dependent on GTPase Activating Protein (GAP) domain of ExoS. Hence, our work highlights T3SS and ExoS, whose expression is modulated by MgtC and OprF, as key players in the intramacrophage life of P. aeruginosa which allow internalized bacteria to lyse macrophages. The ability of professional phagocytes to ingest and kill microorganisms is central to host defense and Pseudomonas aeruginosa has developed mechanisms to avoid being killed by phagocytes. While considered an extracellular pathogen, P. aeruginosa has been reported to be engulfed by macrophages in animal models. Here, we visualized the fate of P. aeruginosa within cultured macrophages, revealing macrophage lysis driven by intracellular P. aeruginosa. Two bacterial factors, MgtC and OprF, recently discovered to be involved in the intramacrophage survival of P. aeruginosa, appeared to play a role in this cytotoxicity caused by intracellular bacteria. We provided evidence that type III secretion system (T3SS) gene expression is lowered intracellularly in mgtC and oprF mutants. We further showed that intramacrophage P. aeruginosa uses its T3SS, specifically the ExoS effector, to promote phagosomal escape and cell lysis. We thus describe a transient intramacrophage stage of P. aeruginosa that could contribute to bacterial dissemination.
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Affiliation(s)
- Preeti Garai
- Laboratoire de Dynamique des Interactions Membranaires Normales et Pathologiques, Université de Montpellier, CNRS-UMR5235, Montpellier, France
| | - Laurence Berry
- Laboratoire de Dynamique des Interactions Membranaires Normales et Pathologiques, Université de Montpellier, CNRS-UMR5235, Montpellier, France
| | - Malika Moussouni
- Laboratoire de Dynamique des Interactions Membranaires Normales et Pathologiques, Université de Montpellier, CNRS-UMR5235, Montpellier, France
| | - Sophie Bleves
- LISM, Institut de Microbiologie de la Méditerranée, CNRS & Aix-Marseille Univ, Marseille, France
| | - Anne-Béatrice Blanc-Potard
- Laboratoire de Dynamique des Interactions Membranaires Normales et Pathologiques, Université de Montpellier, CNRS-UMR5235, Montpellier, France
- * E-mail:
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Newson T, Berry L, Smith O. P049 Changing population and treatment of children and young people with cystic fibrosis in post newborn screening era in a local shared care service. J Cyst Fibros 2019. [DOI: 10.1016/s1569-1993(19)30344-3] [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: 10/26/2022]
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Berry L, Newson T, Smith O. P414 Evaluation of the impact of patient and family feedback on quality improvement within a local cystic fibrosis service. J Cyst Fibros 2019. [DOI: 10.1016/s1569-1993(19)30706-4] [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: 10/26/2022]
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Bec N, Bonhoure A, Henry L, Berry L, Larroque C, Coux O, Stoebner P, Vidal M. Proteasome 19S RP and translation preinitiation complexes are secreted within exosomes upon serum starvation. Traffic 2019; 20:516-536. [DOI: 10.1111/tra.12653] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 04/29/2019] [Accepted: 04/30/2019] [Indexed: 12/23/2022]
Affiliation(s)
- Nicole Bec
- PP2IUniversity of Montpellier, IRCM Montpellier France
- IRBMUniversity of Montpellier CNRS, Montpellier France
| | - Anne Bonhoure
- DIMNPUniversity of Montpellier, CNRS Montpellier France
| | - Laurent Henry
- IBMMUniversity of Montpellier, CNRS Montpellier France
| | | | - Christian Larroque
- PP2IUniversity of Montpellier, IRCM Montpellier France
- ICMInstitut du Cancer de Montpellier Montpellier France
| | - Olivier Coux
- CRBMUniversity of Montpellier, CNRS Montpellier France
| | | | - Michel Vidal
- DIMNPUniversity of Montpellier, CNRS Montpellier France
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Berry L, Naqvi A, Johnson A, Montgomery C, Donegan D, Willis H, Zeplin J, Ramnarine M, Kwon N. 91 Working Towards a Safer Emergency Department: A Retrospective Chart Review of Patient Falls. Ann Emerg Med 2018. [DOI: 10.1016/j.annemergmed.2018.08.096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Abstract
The leishmaniases are worldwide neglected tropical diseases caused by parasitic protozoa of the Leishmania genus. Different stimuli induce Leishmania cell death, but the proteins involved remain poorly understood. Furthermore, confusion often appears between cell death and the cell survival process autophagy, whose phenotype is not clearly defined. In this article, we present a comprehensive and temporal analysis of the cellular events occurring during miltefosine-induced cell death and autophagy in L. major. We also provide a list of features in order to clearly identify apoptotic cells, autophagic cells and to distinguish both processes. Furthermore, we demonstrate that autophagy is followed by apoptosis in the absence of nutrients. Finally, we show that cells treated with the generic kinase inhibitor staurosporine express apoptotic as well as autophagic markers and therefore cannot be used as an apoptosis inducer in Leishmania. These descriptions lead to a better recognition and understanding of apoptosis and autophagy, enabling their targeting in the development of new anti-leishmanial drugs. These researches also make it possible to better understand these processes in general, through the study of an ancestral eukaryote.
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Affiliation(s)
- Louise Basmaciyan
- UMR PAM A, Valmis team, 2 rue Angélique Ducoudray, BP 37013, 21070 Dijon Cedex, France
| | - Laurence Berry
- Dynamique des Interactions Membranaires Normales et Pathologiques, CNRS UMR 5235, University of Montpellier, France
| | - Julie Gros
- Aix Marseille Univ, IRD, AP-HM, SSA, VITROME, IHU-Méditerranée Infection, Marseille, France
| | - Nadine Azas
- Aix Marseille Univ, IRD, AP-HM, SSA, VITROME, IHU-Méditerranée Infection, Marseille, France
| | - Magali Casanova
- Aix Marseille Univ, IRD, AP-HM, SSA, VITROME, IHU-Méditerranée Infection, Marseille, France
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Morlon-Guyot J, El Hajj H, Martin K, Fois A, Carrillo A, Berry L, Burchmore R, Meissner M, Lebrun M, Daher W. A proteomic analysis unravels novel CORVET and HOPS proteins involved in Toxoplasma gondii
secretory organelles biogenesis. Cell Microbiol 2018; 20:e12870. [DOI: 10.1111/cmi.12870] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 05/23/2018] [Accepted: 06/05/2018] [Indexed: 01/10/2023]
Affiliation(s)
- Juliette Morlon-Guyot
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS, INSERM; Université de Montpellier; Montpellier France
| | - Hiba El Hajj
- Departments of Internal Medicine and Experimental Pathology, Immunology and Microbiology; American University of Beirut; Beirut Lebanon
| | - Kevin Martin
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS, INSERM; Université de Montpellier; Montpellier France
| | - Adrien Fois
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS, INSERM; Université de Montpellier; Montpellier France
| | - Amandine Carrillo
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS, INSERM; Université de Montpellier; Montpellier France
| | - Laurence Berry
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS, INSERM; Université de Montpellier; Montpellier France
| | | | - Markus Meissner
- Wellcome Centre for Molecular Parasitology; University of Glasgow; Glasgow UK
- Department of Veterinary Sciences, Experimental Parasitology; Ludwig-Maximilians-Universität München; Munich Germany
| | - Maryse Lebrun
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS, INSERM; Université de Montpellier; Montpellier France
| | - Wassim Daher
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS, INSERM; Université de Montpellier; Montpellier France
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Morlon-Guyot J, Berry L, Sauquet I, Singh Pall G, El Hajj H, Meissner M, Daher W. Conditional knock-down of a novel coccidian protein leads to the formation of aberrant apical organelles and abrogates mature rhoptry positioning in Toxoplasma gondii. Mol Biochem Parasitol 2018; 223:19-30. [DOI: 10.1016/j.molbiopara.2018.06.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 06/23/2018] [Accepted: 06/23/2018] [Indexed: 01/21/2023]
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Nguyen HM, Berry L, Sullivan WJ, Besteiro S. Autophagy participates in the unfolded protein response in Toxoplasma gondii. FEMS Microbiol Lett 2018; 364:3983156. [PMID: 28859319 DOI: 10.1093/femsle/fnx153] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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: 05/02/2017] [Accepted: 07/19/2017] [Indexed: 12/25/2022] Open
Abstract
Environmental and genetic perturbations of endoplasmic reticulum (ER) function can lead to the accumulation of unfolded proteins. In these conditions, eukaryotic cells can activate a complex signaling network called the unfolded protein response (UPR) to reduce ER stress and restore cellular homeostasis. Autophagy, a degradation and recycling process, is part of this response. The parasitic protist Toxoplasma gondii is known to be able to activate the UPR upon ER stress, and we now show that this pathway leads to autophagy activation, supporting the idea of a regulated function for canonical autophagy as part of an integrated stress response in the parasites.
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Affiliation(s)
- Hoa Mai Nguyen
- DIMNP-UMR 5235 CNRS, Université de Montpellier, Place Eugène Bataillon, CC107, 34095 cedex 5, Montpellier, France
| | - Laurence Berry
- DIMNP-UMR 5235 CNRS, Université de Montpellier, Place Eugène Bataillon, CC107, 34095 cedex 5, Montpellier, France
| | - William J Sullivan
- Departments of Pharmacology & Toxicology, Microbiology and Immunology, Indiana University School of Medicine, 950 W. Walnut St., Indianapolis, IN 46202, USA
| | - Sébastien Besteiro
- DIMNP-UMR 5235 CNRS, Université de Montpellier, Place Eugène Bataillon, CC107, 34095 cedex 5, Montpellier, France
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Ma S, Cahalan S, LaMonte G, Grubaugh ND, Zeng W, Murthy SE, Paytas E, Gamini R, Lukacs V, Whitwam T, Loud M, Lohia R, Berry L, Khan SM, Janse CJ, Bandell M, Schmedt C, Wengelnik K, Su AI, Honore E, Winzeler EA, Andersen KG, Patapoutian A. Common PIEZO1 Allele in African Populations Causes RBC Dehydration and Attenuates Plasmodium Infection. Cell 2018; 173:443-455.e12. [PMID: 29576450 DOI: 10.1016/j.cell.2018.02.047] [Citation(s) in RCA: 140] [Impact Index Per Article: 23.3] [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: 10/04/2017] [Revised: 01/06/2018] [Accepted: 02/14/2018] [Indexed: 01/05/2023]
Abstract
Hereditary xerocytosis is thought to be a rare genetic condition characterized by red blood cell (RBC) dehydration with mild hemolysis. RBC dehydration is linked to reduced Plasmodium infection in vitro; however, the role of RBC dehydration in protection against malaria in vivo is unknown. Most cases of hereditary xerocytosis are associated with gain-of-function mutations in PIEZO1, a mechanically activated ion channel. We engineered a mouse model of hereditary xerocytosis and show that Plasmodium infection fails to cause experimental cerebral malaria in these mice due to the action of Piezo1 in RBCs and in T cells. Remarkably, we identified a novel human gain-of-function PIEZO1 allele, E756del, present in a third of the African population. RBCs from individuals carrying this allele are dehydrated and display reduced Plasmodium infection in vitro. The existence of a gain-of-function PIEZO1 at such high frequencies is surprising and suggests an association with malaria resistance.
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Affiliation(s)
- Shang Ma
- Howard Hughes Medical Institute, Department of Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Stuart Cahalan
- Howard Hughes Medical Institute, Department of Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Gregory LaMonte
- Division of Host-Microbe Systems & Therapeutics, Department of Pediatrics, University of California, San Diego, San Diego, CA, USA
| | - Nathan D Grubaugh
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA
| | - Weizheng Zeng
- Howard Hughes Medical Institute, Department of Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Swetha E Murthy
- Howard Hughes Medical Institute, Department of Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Emma Paytas
- Division of Host-Microbe Systems & Therapeutics, Department of Pediatrics, University of California, San Diego, San Diego, CA, USA
| | - Ramya Gamini
- Department of Integrative, Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA, USA
| | - Viktor Lukacs
- Howard Hughes Medical Institute, Department of Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Tess Whitwam
- Howard Hughes Medical Institute, Department of Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Meaghan Loud
- Howard Hughes Medical Institute, Department of Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Rakhee Lohia
- DIMNP, CNRS, INSERM, University Montpellier, Montpellier, France
| | - Laurence Berry
- DIMNP, CNRS, INSERM, University Montpellier, Montpellier, France
| | - Shahid M Khan
- Leiden Malaria Research Group, Department of Parasitology, Leiden University Medical Center (LUMC), 2333ZA Leiden, the Netherlands
| | - Chris J Janse
- Leiden Malaria Research Group, Department of Parasitology, Leiden University Medical Center (LUMC), 2333ZA Leiden, the Netherlands
| | - Michael Bandell
- Genomics Institute of the Novartis Research Foundation, La Jolla, CA, USA
| | - Christian Schmedt
- Genomics Institute of the Novartis Research Foundation, La Jolla, CA, USA
| | - Kai Wengelnik
- DIMNP, CNRS, INSERM, University Montpellier, Montpellier, France
| | - Andrew I Su
- Department of Integrative, Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA, USA
| | - Eric Honore
- Université Côte d'Azur, Centre National de la Recherche Scientifique, Paris, France; Institut de Pharmacologie Moléculaire et Cellulaire, Labex ICST, Valbonne, France
| | - Elizabeth A Winzeler
- Division of Host-Microbe Systems & Therapeutics, Department of Pediatrics, University of California, San Diego, San Diego, CA, USA
| | - Kristian G Andersen
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA; Department of Integrative, Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA, USA
| | - Ardem Patapoutian
- Howard Hughes Medical Institute, Department of Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, La Jolla, CA 92037, USA.
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Stahl P, Poinsignon Y, Pouedras P, Ciubotaru V, Berry L, Emu B, Krause PJ, Ben Mamoun C, Cornillot E. Case report of the patient source of the Babesia microti R1 reference strain and implications for travelers. J Travel Med 2018; 25:4696553. [PMID: 29394381 PMCID: PMC6927858 DOI: 10.1093/jtm/tax073] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 05/08/2017] [Accepted: 10/14/2017] [Indexed: 11/13/2022]
Abstract
BACKGROUND In 2002, a previously healthy 69-year-old man travelled to France from the United States and presented to our hospital with a febrile illness that subsequently was determined to be babesiosis. The blood isolated from this patient served as a source for propagation of the Babesia microti R1 strain with subsequent sequencing and annotation of the parasite genome. METHODS Upon admission, we obtained a medical history, performed a physical examination, and examined his blood for the presence of a blood borne pathogen by microscopy, PCR and indirect immunofluorescence antibody testing. Once the diagnosis of babesiosis was made, we reviewed the literature to assess the distribution of B. microti-associated babesiosis cases in immunocompetent patients from outside the USA. RESULTS The patient recalled a tick bite during the previous month on Cape Cod, Massachusetts. The diagnosis was confirmed by identification of Babesia-infected red blood cells on blood smears, amplification of B. microti DNA in blood by PCR and the presence of B. microti antibody in the serum. This strain was the first isolate of B. microti to be fully sequenced and its annotated genome serves as a reference for molecular and cell biology studies aimed at understanding B. microti pathophysiology and developing diagnostic tests and therapies. A review of babesiosis cases demonstrates a worldwide distribution of B. microti and identifies potential emerging endemic areas where travelers may be at risk of contracting B. microti infection. CONCLUSION This case provides clinical information about the patient infected with the R1 isolate and a review of travel risk, diagnosis and treatment of babesiosis in endemic and non-endemic areas.
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Affiliation(s)
- Philipp Stahl
- Institute of Virology, Parasitology Unit, University of Marburg, Marburg, Germany.,Department of Internal Medicine, Section of Gastroenterology and Infectious Diseases, University Hospital Gießen and Marburg, Marburg, Germany
| | - Yves Poinsignon
- Internal Medicine Department, Centre Hospitalier Bretagne Atlantique, Vannes, France
| | - Pascal Pouedras
- Microbiology Department, Centre Hospitalier Bretagne Atlantique, Vannes, France
| | - Vasilica Ciubotaru
- Internal Medicine Department, Centre Hospitalier Bretagne Atlantique, Vannes, France
| | - Laurence Berry
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS, Université Montpellier, Montpellier, France
| | - Brinda Emu
- Department of Internal Medicine, Section of Infectious Diseases, Yale School of Medicine, New Haven, CT, USA
| | - Peter J Krause
- Yale School of Public Health and Yale School of Medicine, 60 College St., New Haven, CT 06520, USA
| | - Choukri Ben Mamoun
- Department of Internal Medicine, Section of Infectious Diseases, Yale School of Medicine, New Haven, CT, USA
| | - Emmanuel Cornillot
- Institut de Biologie Computationnelle (IBC), Montpellier, France.,Institut de Recherche en Cancérologie de Montpellier (IRCM - INSERM U1194), Institut régional du Cancer Montpellier (ICM) & Université de Montpellier, France
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Nitschmann E, Berry L, Bridge S, Hatton MWC, Richardson M, Monagle P, Chan AKC, Andrew M. Morphological and Biochemical Features Affecting the Antithrombotic Properties of the Aorta in Adult Rabbits and Rabbit Pups. Thromb Haemost 2017. [DOI: 10.1055/s-0037-1615116] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
SummaryWe hypothesised that there are important physiologic differences in arterial wall structure and function with respect to antithrombotic activity in the very young (pre-puberty) compared to adults. Electron microscopy, gel electrophoresis, and activity assays were used to examine differences in aorta structure and function comparing prepubertal rabbits (pups) to adult rabbits. Differences in endothelial function, extracellular matrix structure, proteoglycan (PG) distribution and glycosaminoglycan (GAG) content and function were shown. In both intima and media, total PG, chondroitin sulfate (CS) PG and heparan sulfate (HS) PG content were significantly increased in pups compared to adult rabbits. These findings corresponded to increased concentrations by mass analyses of CS GAG and DS GAG in aortas from pups. There was also a significant increase in antithrombin activity in pups due to HS GAG. In conclusion, differences in both structure and antithrombin activity of aortas from pups compared to adult rabbits suggest that young arteries may have greater antithrombotic potential that is, at least in part, related to increased HS GAG.
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Kris M, Aisner D, Sholl L, Berry L, Rossi M, Chen H, Fujimoto J, Moreira A, Ramalingam S, Villaruz L, Otterson G, Haura E, Politi K, Glisson B, Cetnar J, Garon E, Schiller J, Waqar S, Sequist L, Brahmer J, Shyr Y, Kugler K, Wistuba I, Johnson B, Minna J, Bunn P, Kwiatkowski D. P3.03-007 LCMC2: Expanded Profiling of Lung Adenocarcinomas Identifies ROS1 and RET Rearrangements and TP53 Mutations as a Negative Prognostic Factor. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1633] [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: 10/18/2022]
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Lévêque MF, Berry L, Yamaryo-Botté Y, Nguyen HM, Galera M, Botté CY, Besteiro S. TgPL2, a patatin-like phospholipase domain-containing protein, is involved in the maintenance of apicoplast lipids homeostasis in Toxoplasma. Mol Microbiol 2017; 105:158-174. [PMID: 28419631 DOI: 10.1111/mmi.13694] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/12/2017] [Indexed: 01/05/2023]
Abstract
Patatin-like phospholipases are involved in numerous cellular functions, including lipid metabolism and membranes remodeling. The patatin-like catalytic domain, whose phospholipase activity relies on a serine-aspartate dyad and an anion binding box, is widely spread among prokaryotes and eukaryotes. We describe TgPL2, a novel patatin-like phospholipase domain-containing protein from the parasitic protist Toxoplasma gondii. TgPL2 is a large protein, in which the key motifs for enzymatic activity are conserved in the patatin-like domain. Using immunofluorescence assays and immunoelectron microscopy analysis, we have shown that TgPL2 localizes to the apicoplast, a non-photosynthetic plastid found in most apicomplexan parasites. This plastid hosts several important biosynthetic pathways, which makes it an attractive organelle for identifying new potential drug targets. We thus addressed TgPL2 function by generating a conditional knockdown mutant and demonstrated it has an essential contribution for maintaining the integrity of the plastid. In absence of TgPL2, the organelle is rapidly lost and remaining apicoplasts appear enlarged, with an abnormal accumulation of membranous structures, suggesting a defect in lipids homeostasis. More precisely, analyses of lipid content upon TgPL2 depletion suggest this protein is important for maintaining levels of apicoplast-generated fatty acids, and also regulating phosphatidylcholine and lysophosphatidylcholine levels in the parasite.
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Affiliation(s)
- Maude F Lévêque
- DIMNP - UMR5235, CNRS, Université de Montpellier, Montpellier, France
| | - Laurence Berry
- DIMNP - UMR5235, CNRS, Université de Montpellier, Montpellier, France
| | - Yoshiki Yamaryo-Botté
- Apicolipid Team, Institute for Advanced Biosciences, UMR5309 CNRS, Inserm U1209, Université Grenoble Alpes, Grenoble, France
| | - Hoa Mai Nguyen
- DIMNP - UMR5235, CNRS, Université de Montpellier, Montpellier, France
| | - Marine Galera
- Apicolipid Team, Institute for Advanced Biosciences, UMR5309 CNRS, Inserm U1209, Université Grenoble Alpes, Grenoble, France
| | - Cyrille Y Botté
- Apicolipid Team, Institute for Advanced Biosciences, UMR5309 CNRS, Inserm U1209, Université Grenoble Alpes, Grenoble, France
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Francisco Hilário F, Traoré MDM, Zwick V, Berry L, Simões-Pires CA, Cuendet M, Fantozzi N, Pereira de Freitas R, Maynadier M, Wein S, Vial H, Wong YS. Synthesis of an Uncharged Tetra-cyclopeptide Acting as a Transmembrane Carrier: Enhanced Cellular and Nuclear Uptake. Org Lett 2017; 19:612-615. [DOI: 10.1021/acs.orglett.6b03776] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Flaviane Francisco Hilário
- Univ. Grenoble Alpes, Département de Pharmacochimie
Moléculaire, CNRS UMR 5063, ICMG FR 2607, 470 rue de la chimie, Grenoble 38041 Cedex 9, France
- Universidade Federal de Ouro Preto, Departamento de
Química, ICEB, Campus Universitário Morro do Cruzeiro, 35400-000 Ouro
Preto, Minas Gerais Brazil
- Universidade Federal de Minas Gerais, Depertamento de
Química, UFMG, Av Pres Antônio Carlos, 6627, Pampulha, Belo Horizonte, MG 31270-901, Brazil
| | - Mohamed Dit Mady Traoré
- Univ. Grenoble Alpes, Département de Pharmacochimie
Moléculaire, CNRS UMR 5063, ICMG FR 2607, 470 rue de la chimie, Grenoble 38041 Cedex 9, France
- Univ. Grenoble Alpes, Département de Chimie
Moléculaire, CNRS UMR 5250, ICMG FR 2607, 301 rue de la chimie, Grenoble 38041 Cedex 9, France
| | - Vincent Zwick
- School
of Pharmaceutical Sciences, University of Geneva, University of Lausanne, rue Michel Servet 1, 1211 Geneva, Switzerland
| | - Laurence Berry
- Laboratoire
Dynamique des Interactions Membranaires Normales et Pathologiques,
UMR5235, CNRS, University of Montpellier, Place Eugène Bataillon, 34095 Montpellier, France
| | - Claudia A. Simões-Pires
- School
of Pharmaceutical Sciences, University of Geneva, University of Lausanne, rue Michel Servet 1, 1211 Geneva, Switzerland
| | - Muriel Cuendet
- School
of Pharmaceutical Sciences, University of Geneva, University of Lausanne, rue Michel Servet 1, 1211 Geneva, Switzerland
| | - Nicolas Fantozzi
- Univ. Grenoble Alpes, Département de Pharmacochimie
Moléculaire, CNRS UMR 5063, ICMG FR 2607, 470 rue de la chimie, Grenoble 38041 Cedex 9, France
| | - Rossimiriam Pereira de Freitas
- Universidade Federal de Minas Gerais, Depertamento de
Química, UFMG, Av Pres Antônio Carlos, 6627, Pampulha, Belo Horizonte, MG 31270-901, Brazil
| | - Marjorie Maynadier
- Laboratoire
Dynamique des Interactions Membranaires Normales et Pathologiques,
UMR5235, CNRS, University of Montpellier, Place Eugène Bataillon, 34095 Montpellier, France
| | - Sharon Wein
- Laboratoire
Dynamique des Interactions Membranaires Normales et Pathologiques,
UMR5235, CNRS, University of Montpellier, Place Eugène Bataillon, 34095 Montpellier, France
| | - Henri Vial
- Laboratoire
Dynamique des Interactions Membranaires Normales et Pathologiques,
UMR5235, CNRS, University of Montpellier, Place Eugène Bataillon, 34095 Montpellier, France
| | - Yung-Sing Wong
- Univ. Grenoble Alpes, Département de Pharmacochimie
Moléculaire, CNRS UMR 5063, ICMG FR 2607, 470 rue de la chimie, Grenoble 38041 Cedex 9, France
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Nguyen HM, El Hajj H, El Hajj R, Tawil N, Berry L, Lebrun M, Bordat Y, Besteiro S. Toxoplasma gondii
autophagy-related protein ATG9 is crucial for the survival of parasites in their host. Cell Microbiol 2017; 19. [DOI: 10.1111/cmi.12712] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 12/12/2016] [Accepted: 12/15/2016] [Indexed: 12/26/2022]
Affiliation(s)
- Hoa Mai Nguyen
- DIMNP-UMR 5235 CNRS; Université de Montpellier; Montpellier France
| | - Hiba El Hajj
- Faculty of Medicine; American University of Beirut; Beirut Lebanon
| | - Rana El Hajj
- Faculty of Medicine; American University of Beirut; Beirut Lebanon
| | - Nadim Tawil
- Faculty of Medicine; American University of Beirut; Beirut Lebanon
| | - Laurence Berry
- DIMNP-UMR 5235 CNRS; Université de Montpellier; Montpellier France
| | - Maryse Lebrun
- DIMNP-UMR 5235 CNRS; Université de Montpellier; Montpellier France
| | - Yann Bordat
- DIMNP-UMR 5235 CNRS; Université de Montpellier; Montpellier France
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Singh VK, Berry L, Bernut A, Singh S, Carrère-Kremer S, Viljoen A, Alibaud L, Majlessi L, Brosch R, Chaturvedi V, Geurtsen J, Drancourt M, Kremer L. A unique PE_PGRS protein inhibiting host cell cytosolic defenses and sustaining full virulence of Mycobacterium marinum in multiple hosts. Cell Microbiol 2016; 18:1489-1507. [PMID: 27120981 DOI: 10.1111/cmi.12606] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 03/22/2016] [Accepted: 04/09/2016] [Indexed: 12/11/2022]
Abstract
Despite intense research, PE_PGRS proteins still represent an intriguing aspect of mycobacterial pathogenesis. These cell surface proteins influence virulence in several pathogenic species, but their diverse and exact functions remain unclear. Herein, we focussed on a PE_PGRS member from Mycobacterium marinum, MMAR_0242, characterized by an extended and unique C-terminal domain. We demonstrate that an M. marinum mutant carrying a transposon insertion in MMAR_0242 is highly impaired in its ability to replicate in macrophages and amoebae, because of its inability to inhibit lysosomal fusion. As a consequence, this mutant failed to survive intracellularly as evidenced by a reduced number of cytosolic actin tail-forming bacteria and by quantitative electron microscopy, which mainly localized MMAR_0242::Tn within membrane-defined vacuoles. Functional complementation studies indicated that the C-terminus, but not the N-terminal PE_PGRS domain, is required for intracellular growth/survival. In line with these findings, disruption of MMAR_0242 resulted in a highly attenuated virulence phenotype in zebrafish embryos, characterized by restricted bacterial loads and a failure to produce granulomas. Furthermore, expression of MMAR_0242 in Mycobacterium smegmatis, a non-pathogenic species naturally deficient in PE_PGRS production, resulted in increased survival in amoebae with enhanced cytotoxic cell death and increased survival in infected mice with splenomegaly. Overall, these results indicate that MMAR_0242 is required for full virulence of M. marinum and sufficient to confer pathogenic properties to M. smegmatis.
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Affiliation(s)
- Vipul K Singh
- Laboratoire de Dynamique des Interactions Membranaires Normales et Pathologiques, Université de Montpellier, CNRS UMR 5235, case 107, Place Eugène Bataillon, 34095, Montpellier Cedex 05, France
| | - Laurence Berry
- Laboratoire de Dynamique des Interactions Membranaires Normales et Pathologiques, Université de Montpellier, CNRS UMR 5235, case 107, Place Eugène Bataillon, 34095, Montpellier Cedex 05, France
| | - Audrey Bernut
- Centre d'étude des Pathogènes et Biotechnologies pour la Santé (CPBS), CNRS FRE 3689, 1919 route de Mende, 34293, Montpellier, France
| | - Shubhra Singh
- Biochemistry Division, CSIR-Central Drug Research Institute, 226031, Lucknow, Uttar Pradesh, India.,IFTM University, Lodhipur Rajput, Delhi Road (NH-24) Moradabad, Uttar Pradesh, 244102, India
| | - Séverine Carrère-Kremer
- INSERM U1058, Université de Montpellier and Department of Bacteriology-Virology, CHU de Montpellier, 34095, Montpellier, France
| | - Albertus Viljoen
- Centre d'étude des Pathogènes et Biotechnologies pour la Santé (CPBS), CNRS FRE 3689, 1919 route de Mende, 34293, Montpellier, France
| | - Laeticia Alibaud
- Laboratoire de Dynamique des Interactions Membranaires Normales et Pathologiques, Université de Montpellier, CNRS UMR 5235, case 107, Place Eugène Bataillon, 34095, Montpellier Cedex 05, France
| | - Laleh Majlessi
- Institut Pasteur, Unité de Pathogénomique Mycobactérienne Intégrée, 25 rue du Dr. Roux, 75724, Paris, France
| | - Roland Brosch
- Institut Pasteur, Unité de Pathogénomique Mycobactérienne Intégrée, 25 rue du Dr. Roux, 75724, Paris, France
| | - Vinita Chaturvedi
- Biochemistry Division, CSIR-Central Drug Research Institute, 226031, Lucknow, Uttar Pradesh, India
| | - Jeroen Geurtsen
- Department of Medical Microbiology and Infection Control, VU University Medical Center, 1081 BT, Amsterdam, The Netherlands
| | - Michel Drancourt
- Université Aix-Marseille, URMITE, UMR63, CNRS 7278, IRD 198, INSERM 1095, Marseille, France
| | - Laurent Kremer
- Laboratoire de Dynamique des Interactions Membranaires Normales et Pathologiques, Université de Montpellier, CNRS UMR 5235, case 107, Place Eugène Bataillon, 34095, Montpellier Cedex 05, France. .,Centre d'étude des Pathogènes et Biotechnologies pour la Santé (CPBS), CNRS FRE 3689, 1919 route de Mende, 34293, Montpellier, France. .,INSERM, CPBS, 1919 route de Mende, Montpellier, France.
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Lindenmayer DB, Blanchard W, MacGregor C, Barton P, Banks SC, Crane M, Michael D, Okada S, Berry L, Florance D, Gill M. Temporal trends in mammal responses to fire reveals the complex effects of fire regime attributes. Ecol Appl 2016; 26:557-573. [PMID: 27209795 DOI: 10.1890/15-0575] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Fire is a major ecological process in many ecosystems worldwide. We sought to identify which attributes of fire regimes affect temporal change in the presence and abundance of Australian native mammals. Our detailed study was underpinned by time series data on 11 mammal species at 97 long-term sites in southeastern Australia between 2003 and 2013. We explored how temporal aspects of fire regimes influenced the presence and conditional abundance of species. The key fire regime components examined were: (1) severity of a major fire in 2003, (2) interval between the last major fire (2003) and the fire prior to that, and (3) number of past fires. Our long-term data set enabled quantification of the interactions between survey year and each fire regime variable: an ecological relationship missing from temporally restricted studies. We found no evidence of any appreciable departures from the assumption of independence of the sites. Multiple aspects of fire regimes influenced temporal variation in the presence and abundance of mammals. The best models indicated that six of the 11 species responded to two or more fire regime variables, with two species influenced by all three fire regime attributes. Almost all species responded to time since fire, either as an interaction with survey year or as a main effect. Fire severity or its interaction with survey year was important for most terrestrial rodents. The number of fires at a site was significant for terrestrial rodents and several other species. Our findings contain evidence of the effects on native mammals of heterogeneity in fire regimes. Temporal response patterns of mammal species were influenced by multiple fire regime attributes, often in conjunction with survey year. This underscores the critical importance of long-term studies of biota that are coupled with data sets characterized by carefully documented fire history, severity, and frequency. Long-term studies are essential to predict animal responses to fires and guide management of when and where (prescribed) fire or, conversely, long-unburned vegetation is needed. The complexity of observed responses highlights the need for large reserves in which patterns of heterogeneity in fire regimes can be sustained in space and over time.
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Berry L, Chen CT, Reininger L, Carvalho TG, El Hajj H, Morlon-Guyot J, Bordat Y, Lebrun M, Gubbels MJ, Doerig C, Daher W. The conserved apicomplexan Aurora kinase TgArk3 is involved in endodyogeny, duplication rate and parasite virulence. Cell Microbiol 2016; 18:1106-1120. [PMID: 26833682 DOI: 10.1111/cmi.12571] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [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: 10/21/2015] [Revised: 01/19/2016] [Accepted: 01/20/2016] [Indexed: 12/25/2022]
Abstract
Aurora kinases are eukaryotic serine/threonine protein kinases that regulate key events associated with chromatin condensation, centrosome and spindle function and cytokinesis. Elucidating the roles of Aurora kinases in apicomplexan parasites is crucial to understand the cell cycle control during Plasmodium schizogony or Toxoplasma endodyogeny. Here, we report on the localization of two previously uncharacterized Toxoplasma Aurora-related kinases (Ark2 and Ark3) in tachyzoites and of the uncharacterized Ark3 orthologue in Plasmodium falciparum erythrocytic stages. In Toxoplasma gondii, we show that TgArk2 and TgArk3 concentrate at specific sub-cellular structures linked to parasite division: the mitotic spindle and intranuclear mitotic structures (TgArk2), and the outer core of the centrosome and the budding daughter cells cytoskeleton (TgArk3). By tagging the endogenous PfArk3 gene with the green fluorescent protein in live parasites, we show that PfArk3 protein expression peaks late in schizogony and localizes at the periphery of budding schizonts. Disruption of the TgArk2 gene reveals no essential function for tachyzoite propagation in vitro, which is surprising giving that the P. falciparum and P. berghei orthologues are essential for erythrocyte schizogony. In contrast, knock-down of TgArk3 protein results in pronounced defects in parasite division and a major growth deficiency. TgArk3-depleted parasites display several defects, such as reduced parasite growth rate, delayed egress and parasite duplication, defect in rosette formation, reduced parasite size and invasion efficiency and lack of virulence in mice. Our study provides new insights into cell cycle control in Toxoplasma and malaria parasites and highlights Aurora kinase 3 as potential drug target.
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Affiliation(s)
- Laurence Berry
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS, Université Montpellier, Montpellier, France
| | - Chun-Ti Chen
- Department of Biology, Boston College, Chestnut Hill, MA 02467, USA
| | - Luc Reininger
- Laboratoire de Biologie Cellulaire Comparative des Apicomplexes, INSERM U1016, Institut Cochin, Paris, France
| | - Teresa G Carvalho
- Infection and Immunity Program, Monash Biomedicine Discovery Institute and Department of Microbiology, Monash University, Victoria, Australia, 3800
| | - Hiba El Hajj
- Department of Internal Medicine and Experimental Pathology, Immunology and Microbiology, American University of Beirut, Beirut 1107 2020, Lebanon
| | - Juliette Morlon-Guyot
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS, Université Montpellier, Montpellier, France
| | - Yann Bordat
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS, Université Montpellier, Montpellier, France
| | - Maryse Lebrun
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS, Université Montpellier, Montpellier, France
| | - Marc-Jan Gubbels
- Department of Biology, Boston College, Chestnut Hill, MA 02467, USA
| | - Christian Doerig
- Infection and Immunity Program, Monash Biomedicine Discovery Institute and Department of Microbiology, Monash University, Victoria, Australia, 3800
| | - Wassim Daher
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS, Université Montpellier, Montpellier, France
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Berry L, Button T, Fonnie C, King M. How to set up an Ebola isolation unit: Lessons learned from Rokupa. J Clin Virol 2015. [DOI: 10.1016/j.jcv.2015.07.046] [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: 10/23/2022]
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Morlon‐Guyot J, Pastore S, Berry L, Lebrun M, Daher W. Toxoplasma gondii
Vps11, a subunit of
HOPS
and
CORVET
tethering complexes, is essential for the biogenesis of secretory organelles. Cell Microbiol 2015; 17:1157-78. [DOI: 10.1111/cmi.12426] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Revised: 01/20/2015] [Accepted: 01/28/2015] [Indexed: 12/17/2022]
Affiliation(s)
- Juliette Morlon‐Guyot
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS Université Montpellier Montpellier France
| | - Sandra Pastore
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS Université Montpellier Montpellier France
| | - Laurence Berry
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS Université Montpellier Montpellier France
| | - Maryse Lebrun
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS Université Montpellier Montpellier France
| | - Wassim Daher
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS Université Montpellier Montpellier France
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Best S, Tate T, Noble B, Smith R, Tuft J, Tracey N, McCullugh A, Eley J, Black J, Stockton M, Cheesley A, Berry L, Burton C, Dechamps A, Stevens E, Penny A, McEnhill L, McNair A, Cupid B, Maeso B, Chapman D, McIlfatrick S, Nelson A, Sivell S, Baillie J, VanGodwin J, Candy B, Beaumont N, Cowan K. RESEARCH PRIORITY SETTING IN PALLIATIVE AND END OF LIFE CARE: THE JAMES LIND ALLIANCE APPROACH CONSULTING PATIENTS, CARERS AND CLINICIANS. BMJ Support Palliat Care 2015. [DOI: 10.1136/bmjspcare-2014-000838.3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Mbengue A, Vialla E, Berry L, Fall G, Audiger N, Demettre-Verceil E, Boteller D, Braun-Breton C. New Export Pathway inPlasmodium falciparum-Infected Erythrocytes: Role of the Parasite Group II Chaperonin, PfTRiC. Traffic 2015; 16:461-75. [DOI: 10.1111/tra.12266] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 01/20/2015] [Accepted: 01/21/2015] [Indexed: 11/28/2022]
Affiliation(s)
- Alassane Mbengue
- University Montpellier II; CNRS UMR 5235, University Montpellier I; Dynamique des Interactions Membranaires Normales et Pathologiques 34095 Montpellier Cedex 5 France
| | - Emilie Vialla
- University Montpellier II; CNRS UMR 5235, University Montpellier I; Dynamique des Interactions Membranaires Normales et Pathologiques 34095 Montpellier Cedex 5 France
| | - Laurence Berry
- University Montpellier II; CNRS UMR 5235, University Montpellier I; Dynamique des Interactions Membranaires Normales et Pathologiques 34095 Montpellier Cedex 5 France
| | - Gamou Fall
- University Montpellier II; CNRS UMR 5235, University Montpellier I; Dynamique des Interactions Membranaires Normales et Pathologiques 34095 Montpellier Cedex 5 France
| | - Nicolas Audiger
- University Montpellier II; CNRS UMR 5235, University Montpellier I; Dynamique des Interactions Membranaires Normales et Pathologiques 34095 Montpellier Cedex 5 France
| | - Edith Demettre-Verceil
- Plate-forme de Protéomique Fonctionnelle - FPP; UMS CNRS 3426 - US 009 INSERM - UMI - UMII, IGF; 141 rue de la Cardonille 34094 Montpellier Cedex 5 France
| | - David Boteller
- University Montpellier II; CNRS UMR 5235, University Montpellier I; Dynamique des Interactions Membranaires Normales et Pathologiques 34095 Montpellier Cedex 5 France
| | - Catherine Braun-Breton
- University Montpellier II; CNRS UMR 5235, University Montpellier I; Dynamique des Interactions Membranaires Normales et Pathologiques 34095 Montpellier Cedex 5 France
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Daher W, Morlon-Guyot J, Sheiner L, Lentini G, Berry L, Tawk L, Dubremetz JF, Wengelnik K, Striepen B, Lebrun M. Lipid kinases are essential for apicoplast homeostasis in Toxoplasma gondii. Cell Microbiol 2014; 17:559-78. [PMID: 25329540 DOI: 10.1111/cmi.12383] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2014] [Revised: 09/26/2014] [Accepted: 10/10/2014] [Indexed: 12/25/2022]
Abstract
Phosphoinositides regulate numerous cellular processes by recruiting cytosolic effector proteins and acting as membrane signalling entities. The cellular metabolism and localization of phosphoinositides are tightly regulated by distinct lipid kinases and phosphatases. Here, we identify and characterize a unique phosphatidylinositol 3 kinase (PI3K) in Toxoplasma gondii, a protozoan parasite belonging to the phylum Apicomplexa. Conditional depletion of this enzyme and subsequently of its product, PI(3)P, drastically alters the morphology and inheritance of the apicoplast, an endosymbiotic organelle of algal origin that is a unique feature of many Apicomplexa. We searched the T. gondii genome for PI(3)P-binding proteins and identified in total six PX and FYVE domain-containing proteins including a PIKfyve lipid kinase, which phosphorylates PI(3)P into PI(3,5)P2 . Although depletion of putative PI(3)P-binding proteins shows that they are not essential for parasite growth and apicoplast biology, conditional disruption of PIKfyve induces enlarged apicoplasts, as observed upon loss of PI(3)P. A similar defect of apicoplast homeostasis was also observed by knocking down the PIKfyve regulatory protein ArPIKfyve, suggesting that in T. gondii, PI(3)P-related function for the apicoplast might mainly be to serve as a precursor for the synthesis of PI(3,5)P2 . Accordingly, PI3K is conserved in all apicomplexan parasites whereas PIKfyve and ArPIKfyve are absent in Cryptosporidium species that lack an apicoplast, supporting a direct role of PI(3,5)P2 in apicoplast homeostasis. This study enriches the already diverse functions attributed to PI(3,5)P2 in eukaryotic cells and highlights these parasite lipid kinases as potential drug targets.
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Affiliation(s)
- Wassim Daher
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS, Université de Montpellier 1 et 2, Montpellier, France
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Berry L, Venkatesan P. Aciclovir-induced neurotoxicity: Utility of CSF and serum CMMG levels in diagnosis. J Clin Virol 2014; 61:608-10. [PMID: 25440915 DOI: 10.1016/j.jcv.2014.09.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [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: 06/23/2014] [Revised: 08/30/2014] [Accepted: 09/03/2014] [Indexed: 11/26/2022]
Abstract
Aciclovir is an anti-viral frequently used for herpes virus infections. Neurotoxicity and nephrotoxicity are uncommon but serious side effects of aciclovir treatment. This case illustrates how aciclovir induced neurotoxicity can present and how it can be diagnosed using quantitative assays of aciclovir and its metabolite in the CSF and serum.
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Affiliation(s)
- L Berry
- Department of Infectious Diseases, Nottingham City Hospital, Hucknall Road, Nottingham NG5 1PB, United Kingdom(1).
| | - P Venkatesan
- Department of Infectious Diseases, Nottingham City Hospital, Hucknall Road, Nottingham NG5 1PB, United Kingdom(1)
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Archer DT, Berry L, Dixon S, Hogg R. ASSESSMENT OF TECHNICAL CHANGES DURING SWIMMING PERFORMANCE IN TRAINED JUNIOR SWIMMERS: Table 1. Br J Sports Med 2013. [DOI: 10.1136/bjsports-2013-093073.46] [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: 11/03/2022]
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Yam XY, Birago C, Fratini F, Di Girolamo F, Raggi C, Sargiacomo M, Bachi A, Berry L, Fall G, Currà C, Pizzi E, Breton CB, Ponzi M. Proteomic analysis of detergent-resistant membrane microdomains in trophozoite blood stage of the human malaria parasite Plasmodium falciparum. Mol Cell Proteomics 2013; 12:3948-61. [PMID: 24045696 DOI: 10.1074/mcp.m113.029272] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [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
Intracellular pathogens contribute to a significant proportion of infectious diseases worldwide. The successful strategy of evading the immune system by hiding inside host cells is common to all the microorganism classes, which exploit membrane microdomains, enriched in cholesterol and sphingolipids, to invade and colonize the host cell. These assemblies, with distinct biochemical properties, can be isolated by means of flotation in sucrose density gradient centrifugation because they are insoluble in nonionic detergents at low temperature. We analyzed the protein and lipid contents of detergent-resistant membranes from erythrocytes infected by Plasmodium falciparum, the most deadly human malaria parasite. Proteins associated with membrane microdomains of trophic parasite blood stages (trophozoites) include an abundance of chaperones, molecules involved in vesicular trafficking, and enzymes implicated in host hemoglobin degradation. About 60% of the identified proteins contain a predicted localization signal suggesting a role of membrane microdomains in protein sorting/trafficking. To validate our proteomic data, we raised antibodies against six Plasmodium proteins not characterized previously. All the selected candidates were recovered in floating low-density fractions after density gradient centrifugation. The analyzed proteins localized either to internal organelles, such as the mitochondrion and the endoplasmic reticulum, or to exported membrane structures, the parasitophorous vacuole membrane and Maurer's clefts, implicated in targeting parasite proteins to the host erythrocyte cytosol or surface. The relative abundance of cholesterol and phospholipid species varies in gradient fractions containing detergent-resistant membranes, suggesting heterogeneity in the lipid composition of the isolated microdomain population. This study is the first report showing the presence of cholesterol-rich microdomains with distinct properties and subcellular localization in trophic stages of Plasmodium falciparum.
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Affiliation(s)
- Xue Yan Yam
- University Montpellier II, CNRS UMR 5235, 34095 Montpellier, Cedex 5, France
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49
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Morlon-Guyot J, Berry L, Chen CT, Gubbels MJ, Lebrun M, Daher W. The Toxoplasma gondii calcium-dependent protein kinase 7 is involved in early steps of parasite division and is crucial for parasite survival. Cell Microbiol 2013; 16:95-114. [PMID: 24011186 DOI: 10.1111/cmi.12186] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Revised: 08/12/2013] [Accepted: 08/14/2013] [Indexed: 12/22/2022]
Abstract
Apicomplexan parasites express various calcium-dependent protein kinases (CDPKs), and some of them play essential roles in invasion and egress. Five of the six CDPKs conserved in most Apicomplexa have been studied at the molecular and cellular levels in Plasmodium species and/or in Toxoplasma gondii parasites, but the function of CDPK7 was so far uncharacterized. In T. gondii, during intracellular replication, two parasites are formed within a mother cell through a unique process called endodyogeny. Here we demonstrate that the knock-down of CDPK7 protein in T. gondii results in pronounced defects in parasite division and a major growth deficiency, while it is dispensable for motility, egress and microneme exocytosis. In cdpk7-depleted parasites, the overall DNA content was not impaired, but the polarity of daughter cells budding and the fate of several subcellular structures or proteins involved in cell division were affected, such as the centrosomes and the kinetochore. Overall, our data suggest that CDPK7 is crucial for proper maintenance of centrosome integrity required for the initiation of endodyogeny. Our findings provide a first insight into the probable role of calcium-dependent signalling in parasite multiplication, in addition to its more widely explored role in invasion and egress.
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Affiliation(s)
- Juliette Morlon-Guyot
- Dynamique des Interactions Membranaires Normales et Pathologiques, UMR5235 CNRS, Université de Montpellier I et II, Montpellier, France
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50
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Kong-Hap MA, Mouammine A, Daher W, Berry L, Lebrun M, Dubremetz JF, Besteiro S. Regulation of ATG8 membrane association by ATG4 in the parasitic protist Toxoplasma gondii. Autophagy 2013; 9:1334-48. [PMID: 23748741 DOI: 10.4161/auto.25189] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
In the process of autophagy, the Atg8 protein is conjugated, through a ubiquitin-like system, to the lipid phosphatidylethanolamine (PE) to associate with the membrane of forming autophagosomes. There, it plays a crucial role in the genesis of these organelles and in autophagy in general. In most eukaryotes, the cysteine peptidase Atg4 processes the C terminus of cytosolic Atg8 to regulate its association with autophagosomal membranes and also delipidates Atg8 to release this protein from membranes. The parasitic protist Toxoplasma gondii contains a functional, yet apparently reduced, autophagic machinery. T. gondii Atg8 homolog, in addition to a cytosolic and occasionally autophagosomal localization, also localizes to the apicoplast, a nonphotosynthetic plastid bounded by four membranes. Our attempts to interfere with TgATG8 function showed that it appears to be essential for parasite multiplication inside its host cell. This protein also displays a peculiar C terminus that does not seem to necessitate processing prior to membrane association and yet an unusually large Toxoplasma homolog of ATG4 is predicted in the parasite genome. A TgATG4 conditional expression mutant that we have generated is severely affected in growth, and displays significant alterations at the organellar level, noticeably with a fragmentation of the mitochondrial network and a loss of the apicoplast. TgATG4-depleted parasites appear to be defective in the recycling of membrane-bound TgATG8. Overall, our data highlight a role for the TgATG8 conjugation pathway in maintaining the homeostasis of the parasite's organelles and suggest that Toxoplasma has evolved a specialized autophagic machinery with original regulation.
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Affiliation(s)
- Marie A Kong-Hap
- UMR 5235 CNRS; Universités de Montpellier 1 et 2; Dynamique des Interactions Membranaires Normales et Pathologiques; Montpellier, France
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