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Puges M, Caradu C, Svahn I, Gontier E, Mzali F, Vignals C, Cazanave C, Bérard X. An ex vivo study of infections of vascular grafts and endografts with scanning electron microscopy. J Vasc Surg 2024:S0741-5214(24)00956-X. [PMID: 38608967 DOI: 10.1016/j.jvs.2024.04.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 03/19/2024] [Accepted: 04/01/2024] [Indexed: 04/14/2024]
Abstract
BACKGROUND Vascular graft and endograft infections (VGEIs) are complicated by high morbidity, mortality, and recurrence rates, notably due to biofilm formation on the graft surface, hardly dislodgeable by the sole anti-infectious treatment. The characteristics of this biofilm are still poorly documented. The aim of this study was to evaluate ex vivo biofilm on removed infected vascular grafts and endografts (VGEs). METHODS Explanted VGEs were prospectively collected from 2019 to 2022 at Bordeaux University Hospital, France. Two samples per graft were used for scanning electron microscopy imaging, one was sonicated and both grafts' sides were imaged. RESULTS A total of 26 patients were included, 18 with VGEI, eight without any infection (endoleak and/or thrombosis) and 29 VGEs were collected. Microbial documentation was obtained in 83% of VGEIs. A thick layer of fibrin was visible on almost all grafts, mixed with a dense biofilm matrix on infected grafts visible as early as one month after the onset of infection. Bacteria were not always visualized on infected grafts' surface (80% on outer side and 85% on luminal side) but were surprisingly present on a third of non-infected grafts. There was no significant difference between biofilm, fibrin, and microorganisms' distribution between the two grafts' sides. However, there were clear differences between infected and non-infected grafts, since immune cells, bacteria and biofilm were more frequently visualized on both sides of infected grafts (p<.05). Bacteria and immune cells although still visible, were significantly less present after sonication; the number of other elements including biofilm was not significantly different. CONCLUSIONS The persistence of a thick layer of fibrin and biofilm embedding microorganisms on both sides of infected VGE even after one month of infection could be the explanation for the low success rates of conservative management and the usual need for graft removal to treat VGEIs.
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Affiliation(s)
- Mathilde Puges
- CHU de Bordeaux, Infectious and Tropical Diseases Department, F-33076 Bordeaux, France; Univ. Bordeaux, UMR 5234 CNRS, ARMYNE, F-33076 Bordeaux, France.
| | - Caroline Caradu
- CHU de Bordeaux, Vascular Surgery Department, F-33076 Bordeaux, France
| | - Isabelle Svahn
- Univ. Bordeaux, CNRS, INSERM, Bordeaux Imaging Center, UAR 3420 US4 F-33076 Bordeaux, France
| | - Etienne Gontier
- Univ. Bordeaux, CNRS, INSERM, Bordeaux Imaging Center, UAR 3420 US4 F-33076 Bordeaux, France
| | - Fatima Mzali
- Univ. Bordeaux, UMR 5234 CNRS, Aquitaine microbiologie, F-33076 Bordeaux, France
| | - Carole Vignals
- CHU de Bordeaux, Infectious and Tropical Diseases Department, F-33076 Bordeaux, France
| | - Charles Cazanave
- CHU de Bordeaux, Infectious and Tropical Diseases Department, F-33076 Bordeaux, France; Univ. Bordeaux, UMR 5234 CNRS, ARMYNE, F-33076 Bordeaux, France
| | - Xavier Bérard
- CHU de Bordeaux, Vascular Surgery Department, F-33076 Bordeaux, France
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Marijić VF, Subirana MA, Schaumlöffel D, Barišić J, Gontier E, Krasnići N, Mijošek T, Hernández-Orts JS, Scholz T, Erk M. First insight in element localisation in different body parts of the acanthocephalan Dentitruncus truttae using TEM and NanoSIMS. Sci Total Environ 2023; 887:164010. [PMID: 37169189 DOI: 10.1016/j.scitotenv.2023.164010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 04/05/2023] [Accepted: 05/04/2023] [Indexed: 05/13/2023]
Abstract
Acanthocephalans, intestinal parasites of vertebrates, are characterised by orders of magnitude higher metal accumulation than free-living organisms, but the mechanism of such effective metal accumulation is still unknown. The aim of our study was to gain new insights into the high-resolution localization of elements in the bodies of acanthocephalans, thus taking an initial step towards elucidating metal uptake and accumulation in organisms under real environmental conditions. For the first time, nanoscale secondary ion mass spectrometry (NanoSIMS) was used for high-resolution mapping of 12 elements (C, Ca, Cu, Fe, N, Na, O, P, Pb, S, Se, and Tl) in three selected body parts (trunk spines, inner part of the proboscis receptacle and inner surface of the tegument) of Dentitruncus truttae, a parasite of brown trout (Salmo trutta) from the Krka River in Croatia. In addition, the same body parts were examined using transmission electron microscopy (TEM) and correlated with NanoSIMS images. Metal concentrations determined using HR ICP-MS confirmed higher accumulation in D. truttae than in the fish intestine. The chemical composition of the acanthocephalan body showed the highest density of C, Ca, N, Na, O, S, as important and constitutive elements in living cells in all studied structures, while Fe was predominant among trace elements. In general, higher element density was found in trunk spines and tegument, as body structures responsible for substance absorption in parasites. The results obtained with NanoSIMS and TEM-NanoSIMS correlative imaging represent pilot data for mapping of elements at nanoscale resolution in the ultrastructure of various body parts of acanthocephalans and generally provide a contribution for further application of this technique in all parasite species.
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Affiliation(s)
- Vlatka Filipović Marijić
- Ruđer Bošković Institute, Division for Marine and Environmental Research, Laboratory for Biological Effects of Metals, Bijenička c. 54, 10000 Zagreb, Croatia.
| | - Maria Angels Subirana
- CNRS, Université de Pau et des Pays de l'Adour, E2S UPPA, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux (IPREM), UMR 5254, 64000 Pau, France
| | - Dirk Schaumlöffel
- CNRS, Université de Pau et des Pays de l'Adour, E2S UPPA, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux (IPREM), UMR 5254, 64000 Pau, France
| | | | - Etienne Gontier
- Université Bordeaux, CNRS, INSERM, Bordeaux Imaging Center, BIC, UAR 3420, US 4, F-33000 Bordeaux, France
| | - Nesrete Krasnići
- Ruđer Bošković Institute, Division for Marine and Environmental Research, Laboratory for Biological Effects of Metals, Bijenička c. 54, 10000 Zagreb, Croatia
| | - Tatjana Mijošek
- Ruđer Bošković Institute, Division for Marine and Environmental Research, Laboratory for Biological Effects of Metals, Bijenička c. 54, 10000 Zagreb, Croatia
| | - Jesús S Hernández-Orts
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic; Natural History Museum, London, Cromwell Road, London SW7 5BD, United Kingdom
| | - Tomáš Scholz
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - Marijana Erk
- Ruđer Bošković Institute, Division for Marine and Environmental Research, Laboratory for Biological Effects of Metals, Bijenička c. 54, 10000 Zagreb, Croatia
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Palhol JSC, Balia M, Sánchez-Román Terán F, Labarchède M, Gontier E, Battefeld A. Direct association with the vascular basement membrane is a frequent feature of myelinating oligodendrocytes in the neocortex. Fluids Barriers CNS 2023; 20:24. [PMID: 37013659 PMCID: PMC10069068 DOI: 10.1186/s12987-023-00425-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 03/21/2023] [Indexed: 04/05/2023] Open
Abstract
BACKGROUND Oligodendrocyte lineage cells interact with the vasculature in the gray matter. Physical and functional interactions between blood vessels and oligodendrocyte precursor cells play an essential role in both the developing and adult brain. Oligodendrocyte precursor cells have been shown to migrate along the vasculature and subsequently detach from it during their differentiation to oligodendrocytes. However, the association of mature oligodendrocytes with blood vessels has been noted since the discovery of this glial cell type almost a century ago, but this interaction remains poorly explored. RESULTS Here, we systematically investigated the extent of mature oligodendrocyte interaction with the vasculature in mouse brain. We found that ~ 17% of oligodendrocytes were in contact with blood vessels in the neocortex, the hippocampal CA1 region and the cerebellar cortex. Contacts were made mainly with capillaries and sparsely with larger arterioles or venules. By combining light and serial electron microscopy, we demonstrated that oligodendrocytes are in direct contact with the vascular basement membrane, raising the possibility of direct signaling pathways and metabolite exchange with endothelial cells. During experimental remyelination in the adult, oligodendrocytes were regenerated and associated with blood vessels in the same proportion compared to control cortex, suggesting a homeostatic regulation of the vasculature-associated oligodendrocyte population. CONCLUSIONS Based on their frequent and close association with blood vessels, we propose that vasculature-associated oligodendrocytes should be considered as an integral part of the brain vasculature microenvironment. This particular location could underlie specific functions of vasculature-associated oligodendrocytes, while contributing to the vulnerability of mature oligodendrocytes in neurological diseases.
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Affiliation(s)
- Justine S C Palhol
- Univ. Bordeaux, CNRS, IMN, UMR 5293, Bordeaux, F-33000, France
- Univ. Bordeaux, INSERM, Magendie, U1215, Bordeaux, F-33000, France
| | - Maddalena Balia
- Univ. Bordeaux, CNRS, IMN, UMR 5293, Bordeaux, F-33000, France
| | | | | | - Etienne Gontier
- Univ. Bordeaux, CNRS, INSERM, Bordeaux Imaging Center, BIC, UAR 3420, US 4, Bordeaux, F-33000, France
| | - Arne Battefeld
- Univ. Bordeaux, CNRS, IMN, UMR 5293, Bordeaux, F-33000, France.
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Germande O, Beaufils F, Daffe G, Gonzalez P, Mornet S, Bejko M, Errera MH, Lacomme S, Gontier E, Guibert C, Baudrimont I, Baudrimont M. Cellular and molecular mechanisms of NiONPs toxicity on eel hepatocytes HEPA-E1: An illustration of the impact of Ni release from mining activity in New Caledonia. Chemosphere 2022; 303:135158. [PMID: 35640691 DOI: 10.1016/j.chemosphere.2022.135158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 05/25/2022] [Accepted: 05/26/2022] [Indexed: 06/15/2023]
Abstract
Anthropic activities such as open pit mining, amplify the natural erosion of metals contained in the soils, particularly in New Caledonia, leading to atmospheric emission of nickel oxide nanoparticles (NiONPs). These particles are produced during extraction end up in aquatic ecosystems through deposition or leaching in the rivers. Despite alarming freshwater Ni concentrations, only few studies have focused on the cellular and molecular mechanisms of NiONPs toxicity on aquatic organisms and particularly on eels. Those fish are known to be sensitive to metal contamination, especially their liver, which is a key organ for lipid metabolism, detoxification and reproduction. The objective of this study was to assess in vitro the cytotoxic effects of NiONPs on Anguilla japonica hepatocytes, HEPA-E1. HEPA-E1 were exposed to NiONPs (0.5-5 μg/cm2) for 4 or 24 h. Several endpoints were studied: (i) viability, (ii) ROS production, SOD activity and selected anti-oxidant genes expression, (iii) inflammation, (iv) calcium signalling, (v) mitochondrial function and (vi) apoptosis. The results evidenced that NiONPs induce a decrease of cell viability and an increase in oxidative stress with a significant superoxide anion production. An increase of mitochondrial calcium concentration and a decrease of mitochondrial membrane potential were observed, leading to apoptosis. These results underline the potential toxic impact of NiONPs on eels living in mining areas. Therefore, eel exposure to NiONPs can affect their migration and reproduction in New Caledonia.
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Affiliation(s)
- Ophélie Germande
- Univ. Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Inserm U 1045, Centre de Recherche Cardio-Thoracique, avenue du Haut Lêveque, Pessac, F-33604, France; Univ. Bordeaux, CNRS, EPHE, UMR EPOC 5805, F-33615, Pessac, France
| | - Fabien Beaufils
- Univ. Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Inserm U 1045, Centre de Recherche Cardio-Thoracique, avenue du Haut Lêveque, Pessac, F-33604, France; CHU de Bordeaux, Service d'exploration fonctionnelle respiratoire, Service de Pédiatrie médicale, Bordeaux, F-33076, France
| | - Guillemine Daffe
- Univ. Bordeaux, CNRS, Observatoire Aquitain des Sciences de l'Univers, UAR 2567 POREA, F-33615, Pessac, France
| | - Patrice Gonzalez
- Univ. Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Univ. Bordeaux, CNRS, EPHE, UMR EPOC 5805, F-33615, Pessac, France
| | - Stéphane Mornet
- Univ. Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, F-33076, Bordeaux, France
| | - Megi Bejko
- Univ. Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, F-33076, Bordeaux, France
| | - Marie-Hélène Errera
- Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Sabrina Lacomme
- Univ. Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Univ. Bordeaux, CNRS, INSERM, Bordeaux Imaging Center, BIC, UAR CNRS 3420, US 004, F-33000, Bordeaux, France
| | - Etienne Gontier
- Univ. Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Univ. Bordeaux, CNRS, INSERM, Bordeaux Imaging Center, BIC, UAR CNRS 3420, US 004, F-33000, Bordeaux, France
| | - Christelle Guibert
- Inserm U 1045, Centre de Recherche Cardio-Thoracique, avenue du Haut Lêveque, Pessac, F-33604, France
| | - Isabelle Baudrimont
- Univ. Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Inserm U 1045, Centre de Recherche Cardio-Thoracique, avenue du Haut Lêveque, Pessac, F-33604, France
| | - Magalie Baudrimont
- Univ. Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Univ. Bordeaux, CNRS, EPHE, UMR EPOC 5805, F-33615, Pessac, France.
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El Hamoui O, Saydé T, Svahn I, Gudin A, Gontier E, Le Coustumer P, Verget J, Barthélémy P, Gaudin K, Battu S, Lespes G, Alies B. Nucleoside-Derived Low-Molecular-Weight Gelators as a Synthetic Microenvironment for 3D Cell Culture. ACS Biomater Sci Eng 2022; 8:3387-3398. [PMID: 35772731 DOI: 10.1021/acsbiomaterials.2c00308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
For the last few decades, many efforts have been made in developing cell culture methods in order to overcome the biological limitations of the conventional two-dimensional culture. This paradigm shift is driven by a large amount of new hydrogel-based systems for three-dimensional culture, among other systems, since they are known to mimic some living tissue properties. One class of hydrogel precursors has received interest in the field of biomaterials, low-molecular-weight gelators (LMWGs). In comparison to polymer gels, LMWG gels are formed by weak interactions upon an external trigger between the molecular subunits, giving them the ability to reverse the gelation, thus showing potential for many applications of practical interest. This study presents the use of the nucleoside derivative subclass of LMWGs, which are glyco-nucleo-bola-amphiphiles, as a proof of concept of a 3D cell culture scaffold. Physicochemical characterization was performed in order to reach the optimal features to fulfill the requirements of the cell culture microenvironment, in terms of the mechanical properties, architecture, molecular diffusion, porosity, and experimental practicality. The retained conditions were tested by culturing glioblastoma cells for over a month. The cell viability, proliferation, and spatial organization showed during the experiments demonstrate the proof of concept of nucleoside-derived LMWGs as a soft 3D cell culture scaffold. One of the hydrogels tested permits cell proliferation and spheroidal organization over the entire culture time. These systems offer many advantages as they consume very few matters within the optimal range of viscoelasticity for cell culture, and the thermoreversibility of these hydrogels permits their use with few instruments. The LMWG-based scaffold for the 3D cell culture presented in this study unlocked the ability to grow spheroids from patient cells to reach personalized therapies by dramatically reducing the variability of the lattice used.
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Affiliation(s)
- Omar El Hamoui
- Université de Bordeaux, INSERM U1212, UMR CNRS 5320, F-33076 Bordeaux, France.,Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux (IPREM), Université de Pau et des Pays de l'Adour (E2S/UPPA) CNRS UMR 5254, 2 Avenue Pierre Angot, 64053 Pau Cedex, France
| | - Tarek Saydé
- Université de Bordeaux, INSERM U1212, UMR CNRS 5320, F-33076 Bordeaux, France.,Université de Limoges, UMR INSERM 1308 CAPTuR, Faculté de Médecine, 87025 Limoges, France
| | - Isabelle Svahn
- Université de Bordeaux, CNRS, INSERM, Bordeaux Imaging Center, BIC, UMS 3420, US 4, F-33000 Bordeaux, France
| | - Antoine Gudin
- Université de Bordeaux, INSERM U1212, UMR CNRS 5320, F-33076 Bordeaux, France
| | - Etienne Gontier
- Université de Bordeaux, CNRS, INSERM, Bordeaux Imaging Center, BIC, UMS 3420, US 4, F-33000 Bordeaux, France
| | - Philippe Le Coustumer
- Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux (IPREM), Université de Pau et des Pays de l'Adour (E2S/UPPA) CNRS UMR 5254, 2 Avenue Pierre Angot, 64053 Pau Cedex, France.,Université de Bordeaux, CNRS, INSERM, Bordeaux Imaging Center, BIC, UMS 3420, US 4, F-33000 Bordeaux, France
| | - Julien Verget
- Université de Bordeaux, INSERM U1212, UMR CNRS 5320, F-33076 Bordeaux, France
| | - Philippe Barthélémy
- Université de Bordeaux, INSERM U1212, UMR CNRS 5320, F-33076 Bordeaux, France
| | - Karen Gaudin
- Université de Bordeaux, INSERM U1212, UMR CNRS 5320, F-33076 Bordeaux, France
| | - Serge Battu
- Université de Limoges, UMR INSERM 1308 CAPTuR, Faculté de Médecine, 87025 Limoges, France
| | - Gaëtane Lespes
- Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux (IPREM), Université de Pau et des Pays de l'Adour (E2S/UPPA) CNRS UMR 5254, 2 Avenue Pierre Angot, 64053 Pau Cedex, France
| | - Bruno Alies
- Université de Bordeaux, INSERM U1212, UMR CNRS 5320, F-33076 Bordeaux, France
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Tingaud-Sequeira A, Mercier E, Michaud V, Pinson B, Gazova I, Gontier E, Decoeur F, McKie L, Jackson IJ, Arveiler B, Javerzat S. The Dct−/− Mouse Model to Unravel Retinogenesis Misregulation in Patients with Albinism. Genes (Basel) 2022; 13:genes13071164. [PMID: 35885947 PMCID: PMC9324463 DOI: 10.3390/genes13071164] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 06/21/2022] [Accepted: 06/24/2022] [Indexed: 11/16/2022] Open
Abstract
We have recently identified DCT encoding dopachrome tautomerase (DCT) as the eighth gene for oculocutaneous albinism (OCA). Patients with loss of function of DCT suffer from eye hypopigmentation and retinal dystrophy. Here we investigate the eye phenotype in Dct−/− mice. We show that their retinal pigmented epithelium (RPE) is severely hypopigmented from early stages, contrasting with the darker melanocytic tissues. Multimodal imaging reveals specific RPE cellular defects. Melanosomes are fewer with correct subcellular localization but disrupted melanization. RPE cell size is globally increased and heterogeneous. P-cadherin labeling of Dct−/− newborn RPE reveals a defect in adherens junctions similar to what has been described in tyrosinase-deficient Tyrc/c embryos. The first intermediate of melanin biosynthesis, dihydroxyphenylalanine (L-Dopa), which is thought to control retinogenesis, is detected in substantial yet significantly reduced amounts in Dct−/− postnatal mouse eyecups. L-Dopa synthesis in the RPE alone remains to be evaluated during the critical period of retinogenesis. The Dct−/− mouse should prove useful in understanding the molecular regulation of retinal development and aging of the hypopigmented eye. This may guide therapeutic strategies to prevent vision deficits in patients with albinism.
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Affiliation(s)
- Angèle Tingaud-Sequeira
- Rare Diseases Genetics and Metabolism, INSERM U1211, SBM Department, University of Bordeaux, F-33076 Bordeaux, France; (A.T.-S.); (E.M.); (V.M.); (B.A.)
| | - Elina Mercier
- Rare Diseases Genetics and Metabolism, INSERM U1211, SBM Department, University of Bordeaux, F-33076 Bordeaux, France; (A.T.-S.); (E.M.); (V.M.); (B.A.)
| | - Vincent Michaud
- Rare Diseases Genetics and Metabolism, INSERM U1211, SBM Department, University of Bordeaux, F-33076 Bordeaux, France; (A.T.-S.); (E.M.); (V.M.); (B.A.)
- Molecular Genetics Laboratory, Bordeaux University Hospital, F-33076 Bordeaux, France
| | - Benoît Pinson
- SAM, TBMcore, CNRS UAR 3427, INSERM US005, Université Bordeaux, F-33076 Bordeaux, France;
| | - Ivet Gazova
- MRC Human Genetics Unit, University of Edinburgh, Edinburgh EH4 2XU, UK; (I.G.); (L.M.); (I.J.J.)
| | - Etienne Gontier
- Bordeaux Imaging Center, CNRS, INSERM, BIC, UMS 3420, US 4, University Bordeaux, F-33076 Bordeaux, France; (E.G.); (F.D.)
| | - Fanny Decoeur
- Bordeaux Imaging Center, CNRS, INSERM, BIC, UMS 3420, US 4, University Bordeaux, F-33076 Bordeaux, France; (E.G.); (F.D.)
| | - Lisa McKie
- MRC Human Genetics Unit, University of Edinburgh, Edinburgh EH4 2XU, UK; (I.G.); (L.M.); (I.J.J.)
| | - Ian J. Jackson
- MRC Human Genetics Unit, University of Edinburgh, Edinburgh EH4 2XU, UK; (I.G.); (L.M.); (I.J.J.)
| | - Benoît Arveiler
- Rare Diseases Genetics and Metabolism, INSERM U1211, SBM Department, University of Bordeaux, F-33076 Bordeaux, France; (A.T.-S.); (E.M.); (V.M.); (B.A.)
- Molecular Genetics Laboratory, Bordeaux University Hospital, F-33076 Bordeaux, France
| | - Sophie Javerzat
- Rare Diseases Genetics and Metabolism, INSERM U1211, SBM Department, University of Bordeaux, F-33076 Bordeaux, France; (A.T.-S.); (E.M.); (V.M.); (B.A.)
- Correspondence:
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7
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Kaulanjan-Checkmodine P, Oucherif S, Prey S, Gontier E, Lacomme S, Loot M, Miljkovic-Licina M, Cario M, Léauté-Labrèze C, Taieb A, Moisan F, Rezvani HR. Is Infantile Hemangioma a Neuroendocrine Tumor? Int J Mol Sci 2022; 23:ijms23095140. [PMID: 35563552 PMCID: PMC9104933 DOI: 10.3390/ijms23095140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 04/26/2022] [Accepted: 04/27/2022] [Indexed: 02/04/2023] Open
Abstract
Infantile hemangioma (IH) is the most common infantile tumor, affecting 5–10% of newborns. Propranolol, a nonselective β-adrenergic receptor (ADRB) antagonist, is currently the first-line treatment for severe IH; however, both its mechanism of action and its main cellular target remain poorly understood. Since betablockers can antagonize the effect of natural ADRB agonists, we postulated that the catecholamine produced in situ in IH may have a role in the propranolol response. By quantifying catecholamines in the IH tissues, we found a higher amount of noradrenaline (NA) in untreated proliferative IHs than in involuted IHs or propranolol-treated IHs. We further found that the first three enzymes of the catecholamine biosynthesis pathway are expressed by IH cells and that their levels are reduced in propranolol-treated tumors. To study the role of NA in the pathophysiology of IH and its response to propranolol, we performed an in vitro angiogenesis assay in which IH-derived endothelial cells, pericytes and/or telocytes were incorporated. The results showed that the total tube formation is sensitive to propranolol only when exogenous NA is added in the three-cell model. We conclude that the IH’s sensitivity to propranolol depends on crosstalk between the endothelial cells, pericytes and telocytes in the context of a high local amount of local NA.
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Affiliation(s)
| | - Sandra Oucherif
- BRIC, UMR 1312, Inserm, University Bordeaux, F-33076 Bordeaux, France; (P.K.-C.); (S.O.); (S.P.); (M.C.); (C.L.-L.); (A.T.)
| | - Sorilla Prey
- BRIC, UMR 1312, Inserm, University Bordeaux, F-33076 Bordeaux, France; (P.K.-C.); (S.O.); (S.P.); (M.C.); (C.L.-L.); (A.T.)
- Service de Dermatologie Adulte et Pédiatrique, CHU de Bordeaux, F-33000 Bordeaux, France
| | - Etienne Gontier
- Electron Microscopy Unit, Bordeaux Imaging Center, F-33076 Bordeaux, France; (E.G.); (S.L.)
| | - Sabrina Lacomme
- Electron Microscopy Unit, Bordeaux Imaging Center, F-33076 Bordeaux, France; (E.G.); (S.L.)
| | - Maya Loot
- CHU de Bordeaux, Service de Chirurgie Pédiatrique, F-33000 Bordeaux, France;
| | - Marijana Miljkovic-Licina
- Department of Pathology and Immunology, University of Geneva Medical School, Rue Michel-Servet 1, CH-1211 Geneva, Switzerland;
| | - Muriel Cario
- BRIC, UMR 1312, Inserm, University Bordeaux, F-33076 Bordeaux, France; (P.K.-C.); (S.O.); (S.P.); (M.C.); (C.L.-L.); (A.T.)
- Centre de Référence pour les Maladies Rares de la Peau, CHU de Bordeaux, INSERM U1312, F-33000 Bordeaux, France
| | - Christine Léauté-Labrèze
- BRIC, UMR 1312, Inserm, University Bordeaux, F-33076 Bordeaux, France; (P.K.-C.); (S.O.); (S.P.); (M.C.); (C.L.-L.); (A.T.)
- Service de Dermatologie Adulte et Pédiatrique, CHU de Bordeaux, F-33000 Bordeaux, France
- Centre de Référence pour les Maladies Rares de la Peau, CHU de Bordeaux, INSERM U1312, F-33000 Bordeaux, France
| | - Alain Taieb
- BRIC, UMR 1312, Inserm, University Bordeaux, F-33076 Bordeaux, France; (P.K.-C.); (S.O.); (S.P.); (M.C.); (C.L.-L.); (A.T.)
- Service de Dermatologie Adulte et Pédiatrique, CHU de Bordeaux, F-33000 Bordeaux, France
- Centre de Référence pour les Maladies Rares de la Peau, CHU de Bordeaux, INSERM U1312, F-33000 Bordeaux, France
| | - François Moisan
- BRIC, UMR 1312, Inserm, University Bordeaux, F-33076 Bordeaux, France; (P.K.-C.); (S.O.); (S.P.); (M.C.); (C.L.-L.); (A.T.)
- Correspondence: (F.M.); (H.R.R.)
| | - Hamid Reza Rezvani
- BRIC, UMR 1312, Inserm, University Bordeaux, F-33076 Bordeaux, France; (P.K.-C.); (S.O.); (S.P.); (M.C.); (C.L.-L.); (A.T.)
- Centre de Référence pour les Maladies Rares de la Peau, CHU de Bordeaux, INSERM U1312, F-33000 Bordeaux, France
- Correspondence: (F.M.); (H.R.R.)
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8
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Germande O, Baudrimont M, Beaufils F, Freund-Michel V, Ducret T, Quignard JF, Errera MH, Lacomme S, Gontier E, Mornet S, Bejko M, Muller B, Marthan R, Guibert C, Deweirdt J, Baudrimont I. NiONPs-induced alteration in calcium signaling and mitochondrial function in pulmonary artery endothelial cells involves oxidative stress and TRPV4 channels disruption. Nanotoxicology 2022; 16:29-51. [PMID: 35090355 DOI: 10.1080/17435390.2022.2030821] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 02/06/2023]
Abstract
In New Caledonia, anthropic activities, such as mining, increase the natural erosion of soils in nickel mines, which in turn, releases nickel oxide nanoparticles (NiONPs) into the atmosphere. Pulmonary vascular endothelial cells represent one of the primary targets for inhaled nanoparticles. The objective of this in vitro study was to assess the cytotoxic effects of NiONPs on human pulmonary artery endothelial cells (HPAEC). Special attention will be given to the level of oxidative stress and calcium signaling, which are involved in the physiopathology of cardiovascular diseases. HPAEC were exposed to NiONPs (0.5-150 μg/cm2) for 4 or 24 h. The following different endpoints were studied: (i) ROS production using CM-H2DCF-DA probe, electron spin resonance, and MitoSOX probe; the SOD activity was also measured (ii) calcium signaling with Fluo4-AM, Rhod-2, and Fluo4-FF probes; (iii) inflammation by IL-6 production and secretion and, (iv) mitochondrial dysfunction and apoptosis with TMRM and MitoTracker probes, and AnnexinV/PI. Our results have evidenced that NiONPs induced oxidative stress in HPAEC. This was demonstrated by an increase in ROS production and a decrease in SOD activity, the two mechanisms seem to trigger a pro-inflammatory response with IL-6 secretion. In addition, NiONPs exposure altered calcium homeostasis inducing an increased cytosolic calcium concentration ([Ca2+]i) that was significantly reduced by the extracellular calcium chelator EGTA and the TRPV4 inhibitor HC-067047. Interestingly, exposure to NiONPs also altered TRPV4 activity. Finally, HPAEC exposure to NiONPs increased intracellular levels of both ROS and calcium ([Ca2+]m) in mitochondria, leading to mitochondrial dysfunction and HPAEC apoptosis.
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Affiliation(s)
- Ophélie Germande
- Université de Bordeaux, Bordeaux, France.,Inserm U 1045, Centre de Recherche Cardio-Thoracique, Pessac, France.,UMR EPOC 5805, Université de Bordeaux, Arcachon, France
| | - Magalie Baudrimont
- Université de Bordeaux, Bordeaux, France.,UMR EPOC 5805, Université de Bordeaux, Arcachon, France
| | - Fabien Beaufils
- Université de Bordeaux, Bordeaux, France.,Inserm U 1045, Centre de Recherche Cardio-Thoracique, Pessac, France.,Service d'Exploration Fonctionnelle Respiratoire, Service de Pédiatrie Médicale, CHU de Bordeaux, Bordeaux, France
| | - Véronique Freund-Michel
- Université de Bordeaux, Bordeaux, France.,Inserm U 1045, Centre de Recherche Cardio-Thoracique, Pessac, France
| | - Thomas Ducret
- Université de Bordeaux, Bordeaux, France.,Inserm U 1045, Centre de Recherche Cardio-Thoracique, Pessac, France
| | - Jean-François Quignard
- Université de Bordeaux, Bordeaux, France.,Inserm U 1045, Centre de Recherche Cardio-Thoracique, Pessac, France
| | - Marie-Hélène Errera
- Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Sabrina Lacomme
- Université de Bordeaux, Bordeaux, France.,CNRS, INSERM, BIC, UMS 3420, Université de Bordeaux, Bordeaux, France
| | - Etienne Gontier
- Université de Bordeaux, Bordeaux, France.,CNRS, INSERM, BIC, UMS 3420, Université de Bordeaux, Bordeaux, France
| | - Stéphane Mornet
- CNRS Bordeaux INP, ICMCB, UMR 5026, Université de Bordeaux, Bordeaux, France
| | - Megi Bejko
- CNRS Bordeaux INP, ICMCB, UMR 5026, Université de Bordeaux, Bordeaux, France
| | - Bernard Muller
- Université de Bordeaux, Bordeaux, France.,Inserm U 1045, Centre de Recherche Cardio-Thoracique, Pessac, France
| | - Roger Marthan
- Université de Bordeaux, Bordeaux, France.,Inserm U 1045, Centre de Recherche Cardio-Thoracique, Pessac, France.,Service d'Exploration Fonctionnelle Respiratoire, Service de Pédiatrie Médicale, CHU de Bordeaux, Bordeaux, France
| | | | - Juliette Deweirdt
- Université de Bordeaux, Bordeaux, France.,Inserm U 1045, Centre de Recherche Cardio-Thoracique, Pessac, France
| | - Isabelle Baudrimont
- Université de Bordeaux, Bordeaux, France.,Inserm U 1045, Centre de Recherche Cardio-Thoracique, Pessac, France
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9
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Deweirdt J, Ducret T, Quignard JF, Freund-Michel V, Lacomme S, Gontier E, Muller B, Marthan R, Guibert C, Baudrimont I. Effects of FW2 Nanoparticles Toxicity in a New In Vitro Pulmonary Vascular Cells Model Mimicking Endothelial Dysfunction. Cardiovasc Toxicol 2021; 22:14-28. [PMID: 34524626 DOI: 10.1007/s12012-021-09679-6] [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] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 07/22/2021] [Indexed: 11/29/2022]
Abstract
Several epidemiological studies have revealed the involvement of nanoparticles (NPs) in respiratory and cardiovascular mortality. In this work, the focus will be on the effect of manufactured carbon black NPs for risk assessment of consumers and workers, as human exposure is likely to increase. Since the pulmonary circulation could be one of the primary targets of inhaled NPs, patients suffering from pulmonary hypertension (PH) could be a population at risk. To compare the toxic effect of carbon black NPs in the pulmonary circulation under physiologic and pathological conditions, we developed a new in vitro model mimicking the endothelial dysfunction and vascular dynamics observed in vascular pathology such as PH. Human pulmonary artery endothelial cells were cultured under physiological conditions (static and normoxia 21% O2) or under pathological conditions (20% cycle stretch and hypoxia 1% O2). Then, cells were treated for 4 or 6 h with carbon black FW2 NPs from 5 to 10 µg/cm2. Different endpoints were studied: (i) NPs internalization by transmission electronic microscopy; (ii) oxidative stress by CM-H2DCFDA probe and electron paramagnetic resonance; (iii) NO (nitrites and nitrates) production by Griess reaction; (iv) inflammation by ELISA assay; and (v) calcium signaling by confocal microscopy. The present study characterizes the in vitro model mimicking endothelial dysfunction in PH and indicates that, under such pathological conditions, oxidative stress and inflammation are increased along with calcium signaling alterations, as compared to the physiological conditions. Human exposure to carbon black NPs could produce greater deleterious effects in vulnerable patients suffering from cardiovascular diseases.
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Affiliation(s)
- J Deweirdt
- University of Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, U 1045, 33000, Bordeaux, France.,Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 33604, Pessac, France
| | - T Ducret
- University of Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, U 1045, 33000, Bordeaux, France.,Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 33604, Pessac, France
| | - J-F Quignard
- University of Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, U 1045, 33000, Bordeaux, France.,Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 33604, Pessac, France
| | - V Freund-Michel
- University of Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, U 1045, 33000, Bordeaux, France.,Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 33604, Pessac, France
| | - S Lacomme
- CNRS, Bordeaux Imaging Center UMS 3420 CNRS - US4 INSERM, 33000, Bordeaux, France
| | - E Gontier
- CNRS, Bordeaux Imaging Center UMS 3420 CNRS - US4 INSERM, 33000, Bordeaux, France
| | - B Muller
- University of Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, U 1045, 33000, Bordeaux, France.,Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 33604, Pessac, France
| | - R Marthan
- University of Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, U 1045, 33000, Bordeaux, France.,Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 33604, Pessac, France.,CHU de Bordeaux, Service d'Exploration Fonctionnelle Respiratoire, 33000, Bordeaux, France
| | - C Guibert
- University of Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, U 1045, 33000, Bordeaux, France.,Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 33604, Pessac, France
| | - I Baudrimont
- University of Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, U 1045, 33000, Bordeaux, France. .,Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 33604, Pessac, France.
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10
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Isaure MP, Albertelli M, Kieffer I, Tucoulou R, Petrel M, Gontier E, Tessier E, Monperrus M, Goñi-Urriza M. Relationship Between Hg Speciation and Hg Methylation/Demethylation Processes in the Sulfate-Reducing Bacterium Pseudodesulfovibrio hydrargyri: Evidences From HERFD-XANES and Nano-XRF. Front Microbiol 2020; 11:584715. [PMID: 33154741 PMCID: PMC7591507 DOI: 10.3389/fmicb.2020.584715] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 09/17/2020] [Indexed: 01/09/2023] Open
Abstract
Microorganisms are key players in the transformation of mercury into neurotoxic methylmercury (MeHg). Nevertheless, this mechanism and the opposite MeHg demethylation remain poorly understood. Here, we explored the impact of inorganic mercury (IHg) and MeHg concentrations from 0.05 to 50 μM on the production and degradation of MeHg in two sulfate-reducing bacteria, Pseudodesulfovibrio hydrargyri BerOc1 able to methylate and demethylate mercury and Desulfovibrio desulfuricans G200 only able to demethylate MeHg. MeHg produced by BerOc1 increased with increasing IHg concentration with a maximum attained for 5 μM, and suggested a saturation of the process. MeHg was mainly found in the supernatant suggesting its export from the cell. Hg L3-edge High- Energy-Resolution-Fluorescence-Detected-X-ray-Absorption-Near-Edge-Structure spectroscopy (HERFD-XANES) identified MeHg produced by BerOc1 as MeHg-cysteine2 form. A dominant tetracoordinated βHgS form was detected for BerOc1 exposed to the lowest IHg concentrations where methylation was detected. In contrast, at the highest exposure (50 μM) where Hg methylation was abolished, Hg species drastically changed suggesting a role of Hg speciation in the production of MeHg. The tetracoordinated βHgS was likely present as nano-particles as suggested by transmission electron microscopy combined to X-ray energy dispersive spectroscopy (TEM-X-EDS) and nano-X ray fluorescence (nano-XRF). When exposed to MeHg, the production of IHg, on the contrary, increased with the increase of MeHg exposure until 50 μM for both BerOc1 and G200 strains, suggesting that demethylation did not require intact biological activity. The formed IHg species were identified as various tetracoordinated Hg-S forms. These results highlight the important role of thiol ligands and Hg coordination in Hg methylation and demethylation processes.
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Affiliation(s)
- Marie-Pierre Isaure
- Université de Pau et des Pays de l'Adour, E2S UPPA, CNRS, MIRA, IPREM, Pau, France
| | - Marine Albertelli
- Université de Pau et des Pays de l'Adour, E2S UPPA, CNRS, MIRA, IPREM, Pau, France
| | - Isabelle Kieffer
- FAME-UHD, BM16 Beamline, European Synchrotron Radiation Facility (ESRF), BP220, Grenoble, France.,CNRS, IRD, Irstea, Météo France, OSUG, FAME, Université Grenoble Alpes, Grenoble, France
| | - Rémi Tucoulou
- ID16B Beamline, European Synchrotron Radiation Facility (ESRF), BP220, Grenoble, France
| | - Melina Petrel
- Bordeaux Imaging Center UMS 3420 CNRS - US4 INSERM, Université de Bordeaux, Pôle d'imagerie Électronique, Bordeaux, France
| | - Etienne Gontier
- Bordeaux Imaging Center UMS 3420 CNRS - US4 INSERM, Université de Bordeaux, Pôle d'imagerie Électronique, Bordeaux, France
| | - Emmanuel Tessier
- Université de Pau et des Pays de l'Adour, E2S UPPA, CNRS, MIRA, IPREM, Pau, France
| | - Mathilde Monperrus
- Université de Pau et des Pays de l'Adour, E2S UPPA, CNRS, MIRA, IPREM, Anglet, France
| | - Marisol Goñi-Urriza
- Université de Pau et des Pays de l'Adour, E2S UPPA, CNRS, MIRA, IPREM, Pau, France
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11
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Pasdois P, Haeberlin A, Ploux S, Mahamat H, Meo M, Dubois R, Guillot B, Recalde A, Walton R, Pallares Lupon N, Bevilacqua M, Gontier E, Virginie L, Gonthier D, Cassiat-Morisset G, Meillet V, Hocini M, Bernus O, Dos Santos P, Jaïs P. Study of electrophysiological, structural, and mitochondrial metabolism remodelling in a sheep model of atrial fibrillation monitored by telemetry. Archives of Cardiovascular Diseases Supplements 2020. [DOI: 10.1016/j.acvdsp.2020.03.160] [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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12
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Mias C, Maret A, Gontier E, Carrasco C, Satge C, Bessou-Touya S, Coubetergues H, Bennett-Kennett R, Dauskardt RH, Duplan H. Protective properties of Avène Thermal Spring Water on biomechanical, ultrastructural and clinical parameters of human skin. J Eur Acad Dermatol Venereol 2020; 34 Suppl 5:15-20. [PMID: 32870553 DOI: 10.1111/jdv.16450] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 03/27/2020] [Accepted: 03/31/2020] [Indexed: 11/27/2022]
Abstract
BACKGROUND Thermal Spring Water (TSW) has been recognized to have beneficial effects on skin; however, the mechanisms underlying these are not completely elucidated. AIMS We compared the effects of Avène TSW with mineral-rich (MR) TSW on the biomechanical properties of the skin using mechanistic ex vivo assays and clinical studies. METHODS Ex vivo studies included the effect of both TSWs on the structure of the surface of human skin explants using scanning electron microscopy (SEM); mineral elemental content on the skin surface using SEM coupled to energy dispersing X-ray spectroscopy; and the stress properties of the stratum corneum (SC) when exposed to dehydration. Human clinical studies were conducted to compare the soothing effect of TSWs after a dermatological chemical peeling of face skin and to evaluate the overall sensitive scale of consumers using Avène TSW for 7 days. RESULTS Both TSWs preserved surface skin ultrastructure; however, crystals formed from MR-TSW were needle-like and formed small grains, present in clusters heterogeneously spread over the surface. Needle crystals were mainly composed of calcium, while small clusters were mainly composed of sulphur. By contrast, Avène TSW-formed crystals composed of sodium and chlorine only were regular in shape and homogeneously distributed across the skin surface. Peak stress of SC layers was increased by MR-TSW, whereas Avène TSW showed a comparatively reduced effect on dehydration and stress. The difference in the two TSW types was reflected in clinical findings comparing postpeeling redness after TSW application. Avène TSW significantly decreased postpeeling redness, while MR-TSW increased it. The overall sensitive scale of consumers was decreased by 47% using Avène TSW for 7 days. CONCLUSIONS Avène TSW decreases postpeeling redness and soothes sensitive skin in human volunteers. Mechanistic studies suggested that differences in biomechanical effects could be linked to differences in calcium content of the TSW.
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Affiliation(s)
- C Mias
- Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | - A Maret
- Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | - E Gontier
- Bordeaux Imaging Center-UMS 3420 CNRS/Université de Bordeaux-US4 INSERM, Bordeaux, France
| | - C Carrasco
- Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | - C Satge
- Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | | | | | - R Bennett-Kennett
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA
| | - R H Dauskardt
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA
| | - H Duplan
- Pierre Fabre Dermo-Cosmétique, Toulouse, France
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13
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de Gabory L, Boudard P, Bessède JP, Maillard A, Lacomme S, Gontier E, Durand M, Fricain JC, Bénard A, Bordenave L. Multicenter Pilot Study to Assess a Biphasic Calcium Phosphate Implant for Functional and Aesthetic Septorhinoplasty. Facial Plast Surg Aesthet Med 2020; 23:321-329. [PMID: 32700976 DOI: 10.1089/fpsam.2020.0184] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Importance: A validated biomaterial would have several medical advantages in septorhinoplasties requiring a large-volume graft such as avoiding donor site morbidity, making ambulatory surgery possible, and reducing surgical costs. Objective: To assess the safety and efficacy of a ceramic to treat saddle and crooked noses. The main endpoint was the biocompatibility of the implant. The secondary endpoint was its functional and aesthetic efficacy. Design, Setting, and Participants: The nasal septum (NASEPT) study is a pilot multicenter noncomparative prospective phase IIa clinical trial. The biomaterial tested was a biphasic calcium phosphate implant composed of 75% hydroxyapatite and 25% beta tri calcium phosphate. This versatile material can be used to replace septal skeleton when it is absent or nonusable. We included 25 patients with a multifractured osseous and cartilaginous framework after several traumas or surgeries. The implant placement technique was identical to an extracorporeal septoplasty through the external approach. Main Outcomes and Measures: The primary endpoint was the occurrence of expected adverse and severe adverse events. The secondary endpoints were clinical functional and aesthetic results and histological microscopic modifications. Results: Any extrusion, infection, pain, and epistaxis were observed. All implants were placed in a sagittal, straight, and solid position without extralobular depression. Comparisons between pre- and postoperative symptoms showed that nasal comfort (p < 10-4) and quality of life (p < 10-4) were dramatically improved in all patients. The nasolabial angle (p = 0.047) and the columellar projection (p = 0.024) were improved after surgery. Histological data showed little submucosal inflammation at 6 months with well-differentiated epithelium. The mean follow-up was 23 months: three patients underwent revision surgery for functional or aesthetic details and four implants were removed (16%) owing to a foreign body reaction between 17 and 74 months. Conclusion and Relevance: The NASEPT implant meets functional and aesthetic requirements in complex septorhinoplasties but its long-term biocompatibility needs to be improved. It could potentially avoid donor site morbidity.
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Affiliation(s)
- Ludovic de Gabory
- University Hospital of Bordeaux, Department of Otorhinolaryngology, Bordeaux, France.,CHU Bordeaux, CIC 14-01 IT, Bordeaux, France.,University of Bordeaux, Bordeaux, France
| | - Philippe Boudard
- Department of Otorhinolaryngology, Saint Augustin Hospital, Bordeaux, France
| | | | - Aline Maillard
- CHU Bordeaux, Public Health Unit, Clinical Epidemiology Unit (USMR) & CIC 14-01 EC, Bordeaux, France
| | - Sabrina Lacomme
- University of Bordeaux, UMS 3420 CNRS, US4 INSERM, Bordeaux Imaging Center, Bordeaux, France
| | - Etienne Gontier
- University of Bordeaux, UMS 3420 CNRS, US4 INSERM, Bordeaux Imaging Center, Bordeaux, France
| | - Marlène Durand
- CHU Bordeaux, CIC 14-01 IT, Bordeaux, France.,University of Bordeaux, Bordeaux, France.,INSERM, Tissue Bioengineering, U1026, Bordeaux, France
| | | | - Antoine Bénard
- CHU Bordeaux, Public Health Unit, Clinical Epidemiology Unit (USMR) & CIC 14-01 EC, Bordeaux, France
| | - Laurence Bordenave
- CHU Bordeaux, CIC 14-01 IT, Bordeaux, France.,University of Bordeaux, Bordeaux, France.,INSERM, Tissue Bioengineering, U1026, Bordeaux, France
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14
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Mias C, Maret A, Gontier E, Carrasco C, Satge C, Bessou-Touya S, Coubetergues H, Dauskardt R, Duplan H. 244 Protective properties of Avène thermal spring water on biomechanical, ultrastructural and clinical parameters of the human skin. J Invest Dermatol 2020. [DOI: 10.1016/j.jid.2020.03.249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Deweirdt J, Quignard JF, Lacomme S, Gontier E, Mornet S, Savineau JP, Marthan R, Guibert C, Baudrimont I. In vitro study of carbon black nanoparticles on human pulmonary artery endothelial cells: effects on calcium signaling and mitochondrial alterations. Arch Toxicol 2020; 94:2331-2348. [PMID: 32394085 DOI: 10.1007/s00204-020-02764-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [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: 01/07/2020] [Accepted: 04/22/2020] [Indexed: 02/06/2023]
Abstract
Human exposure to manufactured nanoparticles (NPs) is a public health concern. Endothelial cells lining the inner surface of arteries could be one of the primary targets for inhaled nanoparticles. Moreover, it is well known that alteration in calcium signaling is a critical event involved in the physiopathology of cardiovascular diseases. The objective of this study was to assess the role of oxidative stress in carbon black FW2 NPs-induced alteration in calcium signaling and mitochondria in human pulmonary artery endothelial cells. To this end, cells were exposed for 4 or 24 h to FW2 NPs (1-10 μg/cm2) and the following endpoints were studied: (i) production of ROS by fluorimetry and electron paramagnetic resonance, (ii) variation in intracellular calcium concentration by confocal microscopy, and (iii) mitochondrial alteration and apoptosis by confocal microscopy and transmission electronic microscopy. Exposure to FW2 NPs concentration-dependently increases oxidative stress, evidenced by the production of superoxide anion leading to an alteration in calcium content of intracellular organelles, such as endoplasmic reticulum and mitochondria activating, in turn, intrinsic apoptosis. This study provides evidence that FW2 NPs exposure impairs calcium signaling and mitochondria triggered by oxidative stress, and, thus, could act as a cardiovascular disease risk owing to the key role of calcium homeostasis in the control of vascular tone.
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Affiliation(s)
- J Deweirdt
- Univ. Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux U 1045, 33604, Pessac, France.,Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux U1045, 33600, Pessac, France
| | - J F Quignard
- Univ. Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux U 1045, 33604, Pessac, France.,Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux U1045, 33600, Pessac, France
| | - S Lacomme
- CNRS, Bordeaux Imaging Center UMS 3420 CNRS-US4 INSERM, 33000, Bordeaux, France
| | - E Gontier
- CNRS, Bordeaux Imaging Center UMS 3420 CNRS-US4 INSERM, 33000, Bordeaux, France
| | - S Mornet
- CNRS, Univ. Bordeaux, Bordeaux INP, ICMCB, UMR 5026, 33076, Bordeaux, France
| | - J P Savineau
- Univ. Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux U 1045, 33604, Pessac, France.,Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux U1045, 33600, Pessac, France
| | - R Marthan
- Univ. Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux U 1045, 33604, Pessac, France.,Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux U1045, 33600, Pessac, France.,CHU de Bordeaux, Service d'Exploration Fonctionnelle Respiratoire, 33000, Bordeaux, France
| | - C Guibert
- Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux U1045, 33600, Pessac, France
| | - I Baudrimont
- Univ. Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux U 1045, 33604, Pessac, France. .,Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux U1045, 33600, Pessac, France.
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16
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Magnan L, Labrunie G, Fénelon M, Dusserre N, Foulc MP, Lafourcade M, Svahn I, Gontier E, Vélez V. J, McAllister TN, L'Heureux N. Human textiles: A cell-synthesized yarn as a truly "bio" material for tissue engineering applications. Acta Biomater 2020; 105:111-120. [PMID: 31996332 DOI: 10.1016/j.actbio.2020.01.037] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 01/22/2020] [Accepted: 01/22/2020] [Indexed: 01/06/2023]
Abstract
In the field of tissue engineering, many groups have come to rely on the extracellular matrix produced by cells as the scaffold that provides structure and strength to the engineered tissue. We have previously shown that sheets of Cell-Assembled extracellular Matrix (CAM), which are entirely biological yet robust, can be mass-produced for clinical applications using normal, adult, human fibroblasts. In this article, we demonstrate that CAM yarns can be generated with a range of physical and mechanical properties. We show that this material can be used as a simple suture to close a wound or can be assembled into fully biological, human, tissue-engineered vascular grafts (TEVGs) that have high mechanical strength and are implantable. By combining this truly "bio" material with a textile-based assembly, this original tissue engineering approach is highly versatile and can produce a variety of strong human textiles that can be readily integrated in the body. STATEMENT OF SIGNIFICANCE: Yarn of synthetic biomaterials have been turned into textiles for decades because braiding, knitting and weaving machines can mass-produce medical devices with a wide range of shapes and mechanical properties. Here, we show that robust, completely biological, and human yarn can be produced by normal cells in vitro. This yarn can be used as a simple suture material or to produce the first human textiles. For example, we produced a woven tissue-engineered vascular grafts with burst pressure, suture retention strength and transmural permeability that surpassed clinical requirements. This novel strategy holds the promise of a next generation of medical textiles that will be mechanically strong without any foreign scaffolding, and will have the ability to truly integrate into the host's body.
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17
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Penen F, Isaure MP, Dobritzsch D, Castillo-Michel H, Gontier E, Le Coustumer P, Malherbe J, Schaumlöffel D. Pyrenoidal sequestration of cadmium impairs carbon dioxide fixation in a microalga. Plant Cell Environ 2020; 43:479-495. [PMID: 31688962 DOI: 10.1111/pce.13674] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 09/20/2019] [Accepted: 10/30/2019] [Indexed: 06/10/2023]
Abstract
Mixotrophic microorganisms are able to use organic carbon as well as inorganic carbon sources and thus, play an essential role in the biogeochemical carbon cycle. In aquatic ecosystems, the alteration of carbon dioxide (CO2 ) fixation by toxic metals such as cadmium - classified as a priority pollutant - could contribute to the unbalance of the carbon cycle. In consequence, the investigation of cadmium impact on carbon assimilation in mixotrophic microorganisms is of high interest. We exposed the mixotrophic microalga Chlamydomonas reinhardtii to cadmium in a growth medium containing both CO2 and labelled 13 C-[1,2] acetate as carbon sources. We showed that the accumulation of cadmium in the pyrenoid, where it was predominantly bound to sulphur ligands, impaired CO2 fixation to the benefit of acetate assimilation. Transmission electron microscopy (TEM)/X-ray energy dispersive spectroscopy (X-EDS) and micro X-ray fluorescence (μXRF)/micro X-ray absorption near-edge structure (μXANES) at Cd LIII- edge indicated the localization and the speciation of cadmium in the cellular structure. In addition, nanoscale secondary ion mass spectrometry (NanoSIMS) analysis of the 13 C/12 C ratio in pyrenoid and starch granules revealed the origin of carbon sources. The fraction of carbon in starch originating from CO2 decreased from 73 to 39% during cadmium stress. For the first time, the complementary use of high-resolution elemental and isotopic imaging techniques allowed relating the impact of cadmium at the subcellular level with carbon assimilation in a mixotrophic microalga.
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Affiliation(s)
- Florent Penen
- CNRS/Université de Pau et des Pays de l'Adour/E2S UPPA, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux, UMR 5254, Pau, France
| | - Marie-Pierre Isaure
- CNRS/Université de Pau et des Pays de l'Adour/E2S UPPA, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux, UMR 5254, Pau, France
| | - Dirk Dobritzsch
- Martin-Luther-Universität Halle-Wittenberg, Core Facility Proteomic Mass Spectrometry, Proteinzentrum Charles Tanford, Halle (Saale), Germany
| | | | - Etienne Gontier
- Bordeaux Imaging Center UMS 3420 CNRS - US4 INSERM, Pôle d'imagerie électronique, Université de Bordeaux, Bordeaux, France
| | - Philippe Le Coustumer
- CNRS/Université de Pau et des Pays de l'Adour/E2S UPPA, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux, UMR 5254, Pau, France
- Bordeaux Imaging Center UMS 3420 CNRS - US4 INSERM, Pôle d'imagerie électronique, Université de Bordeaux, Bordeaux, France
- UF Sciences de la Terre et Environnement, Université de Bordeaux, Pessac, France
| | - Julien Malherbe
- CNRS/Université de Pau et des Pays de l'Adour/E2S UPPA, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux, UMR 5254, Pau, France
| | - Dirk Schaumlöffel
- CNRS/Université de Pau et des Pays de l'Adour/E2S UPPA, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux, UMR 5254, Pau, France
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18
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Josse G, Mias C, Le Digabel J, Filiol J, Ipinazar C, Villaret A, Gomiero C, Bevilacqua M, Redoules D, Nocera T, Saurat J, Gontier E. High bacterial colonization and lipase activity in microcomedones. Exp Dermatol 2020; 29:168-176. [PMID: 31863492 PMCID: PMC7586799 DOI: 10.1111/exd.14069] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 10/28/2019] [Accepted: 12/03/2019] [Indexed: 12/27/2022]
Abstract
BACKGROUND Although acne vulgaris has a multifactorial aetiology, comedogenesis and bacteria colonization of the pilosebaceous unit are known to play a major role in the onset of inflammatory acne lesions. However, many aspects remain poorly understood such as where and when is the early stage of the Propionibacterium acnes colonization in follicular unit? Our research aimed at providing a precise analysis of microcomedone's structure to better understand the interplay between Propionibacterium acnes and follicular units, and therefore, the role of its interplay in the formation of acne lesions. METHODS Microcomedones were sampled using cyanoacrylate skin surface stripping (CSSS). Their morphology was investigated with multiphoton imaging and their ultrastructure with scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Bacterial lipase activity in the microcomedones was quantified using a dedicated enzymatic test as well as a Fourier Transform Infra-Red (FTIR) analysis. The porphyrin produced by bacteria was analysed with HPTLC and fluorescence spectroscopy. RESULTS The imaging analysis showed that microcomedones' structure resembles a pouch, whose interior is mostly composed of lipids with clusters of bacteria and whose outer shell is made up of corneocyte layers. The extensive bacteria colonization is clearly visible using TEM. Even after sampling, clear lipase activity was still seen in the microcomedone. A high correlation, r = .85, was observed between porphyrin content measured with HPTLC and with fluorescence spectroscopy. These observations show that microcomedones, which are generally barely visible clinically, already contain a bacterial colonization.
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Affiliation(s)
- Gwendal Josse
- Pierre Fabre LaboratoriesSkin Research CenterToulouseFrance
| | - Céline Mias
- Pierre Fabre LaboratoriesSkin Research CenterToulouseFrance
| | | | - Jérôme Filiol
- Pierre Fabre LaboratoriesSkin Research CenterToulouseFrance
| | - Célia Ipinazar
- Pierre Fabre LaboratoriesSkin Research CenterToulouseFrance
| | | | | | | | | | - Thérèse Nocera
- Pierre Fabre LaboratoriesSkin Research CenterToulouseFrance
| | - Jean‐Hilaire Saurat
- Department of Clinical Pharmacology and ToxicologyUniversity of GenevaGenevaSwitzerland
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19
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Berthenet E, Bénéjat L, Ménard A, Varon C, Lacomme S, Gontier E, Raymond J, Boussaba O, Toulza O, Ducournau A, Buissonnière A, Giese A, Megraud F, Bessède E, Jehanne Q, Lehours P. Whole-Genome Sequencing and Bioinformatics as Pertinent Tools to Support Helicobacteracae Taxonomy, Based on Three Strains Suspected to Belong to Novel Helicobacter Species. Front Microbiol 2019; 10:2820. [PMID: 31866982 PMCID: PMC6908825 DOI: 10.3389/fmicb.2019.02820] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 11/20/2019] [Indexed: 01/10/2023] Open
Abstract
The present study describes three putative novel species received at the French National Reference Center for Campylobacters & Helicobacters (CNRCH). The CNRCH 2005/566H strain was isolated in 2005 from the feces of a patient with a hepatocellular carcinoma and gastroenteritis. Strain 48519 was isolated in 2017 from the blood of a male patient suffering from a bacteremia. Strain Cn23e was isolated from a gastric biopsy from a dog suffering from chronic gastritis. Biochemical and growth characteristics and electron microscopy for these three strains were studied. Their genomes were also sequenced. gyrA based phylogeny built with 72 nucleotide sequences placed CNRCH 2005/566H among the unsheathed enterohepatic helicobacters, close to Helicobacter valdiviensis; strain 48519 among the sheathed enterohepatic helicobacters, close to Helicobacter cinaedi; and strain Cn23e among gastric helicobacters, close to Helicobacter felis. 16S rRNA gene phylogeny showed similar results, but with weak discriminant strength. Average nucleotide identity and in silico DNA–DNA hybridization analyses revealed that CNRCH 2005/566H and 48519 strains belong to new putative species, but confirmed that Cn23e corresponds to H. felis. Cn23e was able to infect C57BL6 mice and to induce gastric inflammation. The genomics data, together with their different morphological and biochemical characteristics, revealed that these two strains represent novel Helicobacter species. We propose the following names: ‘Helicobacter burdigaliensis,’ with the type strain CNRCH 2005/566H ( =CECT 8850 =CIP 111660), and ‘Helicobacter labetoulli,’ with the type strain 48519 ( =CCUG 73475 =CIP 1111659). This study highlights that the diversity of the Helicobacteraceae family remains to be fully explored.
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Affiliation(s)
- Elvire Berthenet
- French National Reference Center for Campylobacters and Helicobacters, Bordeaux, France.,Univ. Bordeaux, INSERM, Bordeaux Research in Translational Oncology, BaRITOn, U1053, Bordeaux, France
| | - Lucie Bénéjat
- French National Reference Center for Campylobacters and Helicobacters, Bordeaux, France
| | - Armelle Ménard
- Univ. Bordeaux, INSERM, Bordeaux Research in Translational Oncology, BaRITOn, U1053, Bordeaux, France
| | - Christine Varon
- Univ. Bordeaux, INSERM, Bordeaux Research in Translational Oncology, BaRITOn, U1053, Bordeaux, France
| | - Sabrina Lacomme
- CNRS, INSERM, Bordeaux Imaging Center UMS 3420 - US4, Pôle d'Imagerie Électronique, Bordeaux, France
| | - Etienne Gontier
- CNRS, INSERM, Bordeaux Imaging Center UMS 3420 - US4, Pôle d'Imagerie Électronique, Bordeaux, France
| | - Josette Raymond
- Bacteriology, Cochin Hospital, Institut Pasteur, University of Paris-Descartes, Paris, France
| | - Ouahiba Boussaba
- French National Reference Center for Campylobacters and Helicobacters, Bordeaux, France
| | | | - Astrid Ducournau
- French National Reference Center for Campylobacters and Helicobacters, Bordeaux, France
| | - Alice Buissonnière
- French National Reference Center for Campylobacters and Helicobacters, Bordeaux, France
| | - Alban Giese
- Univ. Bordeaux, INSERM, Bordeaux Research in Translational Oncology, BaRITOn, U1053, Bordeaux, France
| | - Francis Megraud
- French National Reference Center for Campylobacters and Helicobacters, Bordeaux, France.,Univ. Bordeaux, INSERM, Bordeaux Research in Translational Oncology, BaRITOn, U1053, Bordeaux, France
| | - Emilie Bessède
- French National Reference Center for Campylobacters and Helicobacters, Bordeaux, France.,Univ. Bordeaux, INSERM, Bordeaux Research in Translational Oncology, BaRITOn, U1053, Bordeaux, France
| | - Quentin Jehanne
- French National Reference Center for Campylobacters and Helicobacters, Bordeaux, France.,Univ. Bordeaux, INSERM, Bordeaux Research in Translational Oncology, BaRITOn, U1053, Bordeaux, France
| | - Philippe Lehours
- French National Reference Center for Campylobacters and Helicobacters, Bordeaux, France.,Univ. Bordeaux, INSERM, Bordeaux Research in Translational Oncology, BaRITOn, U1053, Bordeaux, France
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20
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Golinelli A, Chen X, Bussière B, Gontier E, Paul PM, Tcherbakoff O, D'Oliveira P, Hergott JF. CEP-stabilized, sub-18 fs, 10 kHz and TW-class 1 kHz dual output Ti:Sa laser with wavelength tunability option. Opt Express 2019; 27:13624-13636. [PMID: 31163823 DOI: 10.1364/oe.27.013624] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 02/25/2019] [Indexed: 06/09/2023]
Abstract
Generating energetic, few-cycle laser pulses with stabilized carrier-envelope phase at a high-repetition rate constitutes a first step to access the ultra-fast dynamics underlying the interaction of matter with intense, ultrashort pulses in attosecond science or high-field physics. We present here a Ti:Sa-based 1 kHz TW-class laser delivering 17.8 fs pulses with 350 mrad shot-to-shot CEP noise based on an original 10 kHz front-end design. In parallel to this short pulse duration operation mode, it is possible to tune the output wavelength of the front end within a 90 nm range around 800 nm.
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21
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Abstract
We report a 6-month-old girl born with a fronto-parietal patch of hair straighter than the remainder of the scalp hairs. We took a biopsy to rule out a congenital melanocytic nevus. We concluded after additional scanning electron microscopy study of the hair shafts that the lesion corresponds to a possible local mosaicism causing an isolated straight hair nevus phenotype.
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Affiliation(s)
- Lucie Rault
- Department of Dermatology and Pediatric Dermatology, National Reference Center for Rare Skin Diseases, INSERM U 1035, University of Bordeaux, Bordeaux, France
| | - Fanny Morice-Picard
- Department of Dermatology and Pediatric Dermatology, National Reference Center for Rare Skin Diseases, INSERM U 1035, University of Bordeaux, Bordeaux, France
| | - Isabelle Svahn
- Bordeaux Imaging Center, Department of Electron Microscopy (UMS 3420), Bordeaux, France
| | - Etienne Gontier
- Bordeaux Imaging Center, Department of Electron Microscopy (UMS 3420), Bordeaux, France
| | - Alexia Eyraud
- Department of Dermatology and Pediatric Dermatology, National Reference Center for Rare Skin Diseases, INSERM U 1035, University of Bordeaux, Bordeaux, France
| | - Alain Taïeb
- Department of Dermatology and Pediatric Dermatology, National Reference Center for Rare Skin Diseases, INSERM U 1035, University of Bordeaux, Bordeaux, France
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22
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Di Martino J, Mascalchi P, Legros P, Lacomme S, Gontier E, Bioulac-Sage P, Balabaud C, Moreau V, Saltel F. Actin Depolymerization in Dedifferentiated Liver Sinusoidal Endothelial Cells Promotes Fenestrae Re-Formation. Hepatol Commun 2018; 3:213-219. [PMID: 30766959 PMCID: PMC6357827 DOI: 10.1002/hep4.1301] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Accepted: 11/14/2018] [Indexed: 12/18/2022] Open
Abstract
Liver sinusoidal endothelial cells (LSECs) possess fenestrae, which are key for the exchange between blood and hepatocytes. Alterations in their number or diameter have important implications for hepatic function in liver diseases. They are lost early in the development of hepatic fibrosis through a process called capillarization. In this study, we aimed to demonstrate whether in vitro dedifferentiated LSECs that have lost fenestrae are able to re-form these structures. Using stimulated emission depletion super-resolution microscopy in combination with transmission electron microscopy, we analyzed fenestrae formation in a model mimicking the capillarization process in vitro. Actin is known to be involved in fenestrae regulation in differentiated LSECs. Using cytochalasin D, an actin-depolymerizing agent, we demonstrated that dedifferentiated LSECs remain capable of forming fenestrae. Conclusion: We provide a new insight into the complex role of actin in fenestrae formation and in the control of their size and show that LSEC fenestrae re-formation is possible, suggesting that this process could be used during fibrosis regression to try to restore exchanges and hepatocyte functions.
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Affiliation(s)
- Julie Di Martino
- INSERM, UMR1053 Bariton-Bordeaux Research in Translational Oncology Bordeaux France.,Université de Bordeaux Bordeaux France
| | - Patrice Mascalchi
- Université de Bordeaux Bordeaux France.,Bordeaux Imaging Center Bordeaux France
| | - Philippe Legros
- Plateforme Aquitaine de Caractérisation des Matériaux Pessac France
| | - Sabrina Lacomme
- Université de Bordeaux Bordeaux France.,Bordeaux Imaging Center Bordeaux France
| | - Etienne Gontier
- Université de Bordeaux Bordeaux France.,Bordeaux Imaging Center Bordeaux France
| | | | - Charles Balabaud
- INSERM, UMR1053 Bariton-Bordeaux Research in Translational Oncology Bordeaux France
| | - Violaine Moreau
- INSERM, UMR1053 Bariton-Bordeaux Research in Translational Oncology Bordeaux France.,Université de Bordeaux Bordeaux France
| | - Frédéric Saltel
- INSERM, UMR1053 Bariton-Bordeaux Research in Translational Oncology Bordeaux France.,Université de Bordeaux Bordeaux France
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23
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Breniaux M, Dutilh L, Petrel M, Gontier E, Campbell-Sills H, Deleris-Bou M, Krieger S, Teissedre PL, Jourdes M, Reguant C, Lucas P. Adaptation of two groups of Oenococcus oeni strains to red and white wines: the role of acidity and phenolic compounds. J Appl Microbiol 2018; 125:1117-1127. [PMID: 29904988 DOI: 10.1111/jam.13946] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [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: 09/29/2017] [Revised: 04/17/2018] [Accepted: 06/01/2018] [Indexed: 11/28/2022]
Abstract
AIMS Oenococcus oeni is the lactic acid bacteria species which is the most adapted to wine. Recently, two groups of strains that form two genetic lineages were described in red and white Burgundy wines. The aim of this study was to analyse the phenotypes of these strains in order to determine how they have adapted specifically to either red or white wine. METHODS AND RESULTS Four strains from each group were tested in grape must and in wines to evaluate their tolerance to pH and to phenolic compound content. White wine strains proved to be the most tolerant to low pH, both in grape must and in wine, whereas they were inhibited by the presence of grape tannins in wine. Red wine strains were more sensitive to acidity, but very resistant to phenolic compounds. CONCLUSIONS The results suggest that pH and phenolic compounds drive strain selection at several stages of wine production. SIGNIFICANCE AND IMPACT OF THE STUDY Although it is well known that O. oeni is well adapted to wine, this study shows that strains of some genetic lineages within this species have evolved to adapt better than others to specific types of wines.
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Affiliation(s)
- M Breniaux
- Unité de recherche Œnologie, Univ. Bordeaux, Villenave d'Ornon Cedex, France
| | - L Dutilh
- Unité de recherche Œnologie, Univ. Bordeaux, Villenave d'Ornon Cedex, France
| | - M Petrel
- Univ. Bordeaux, Bordeaux Imaging Center, Bordeaux, France
| | - E Gontier
- Univ. Bordeaux, Bordeaux Imaging Center, Bordeaux, France
| | - H Campbell-Sills
- Unité de recherche Œnologie, Univ. Bordeaux, Villenave d'Ornon Cedex, France.,LALLEMAND SAS, Blagnac, France
| | | | | | - P-L Teissedre
- Unité de recherche Œnologie, Univ. Bordeaux, Villenave d'Ornon Cedex, France
| | - M Jourdes
- Unité de recherche Œnologie, Univ. Bordeaux, Villenave d'Ornon Cedex, France
| | - C Reguant
- Department of Biochemistry and Biotechnology, University Rovira i Virgili, Tarragona, Catalonia, Spain
| | - P Lucas
- Unité de recherche Œnologie, Univ. Bordeaux, Villenave d'Ornon Cedex, France
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24
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Di Martino J, Mascalchi P, Legros P, Lacomme S, Gontier E, Bioulac-Sage P, Balabaud C, Moreau V, Saltel F. STED microscopy: A simplified method for liver sinusoidal endothelial fenestrae analysis. Biol Cell 2018; 110:159-168. [PMID: 29808906 DOI: 10.1111/boc.201800016] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 03/26/2018] [Accepted: 04/26/2018] [Indexed: 12/11/2022]
Abstract
BACKGROUND INFORMATION Liver sinusoidal endothelial cells (LSECs) possess fenestrae, open transcellular pores with an average diameter of 100 nm. These fenestrae allow for the exchange between blood and hepatocytes. Alterations in their number or diameter in liver diseases have important implications for hepatic microcirculation and function. Although decades of studies, fenestrae are still observed into fixed cells and we have poor knowledge of their dynamics. RESULTS Using stimulated emission depletion (STED) super-resolution microscopy, we have established a faster and simplest method to observe and quantify fenestrae. Indeed, using cytochalasin D, an actin depolymerising agent known to promote fenestrae formation, we measure the increase of fenestrae number. We adapted this methodology to develop an automated method to study fenestrae dynamics. Moreover, with two-colour STED analysis, we have shown that this approach could be useful to study LSECs fenestrae molecular composition. CONCLUSIONS Our approach demonstrates that STED microscopy is suitable for LSEC fenestrae study. SIGNIFICANCE This new way of analysing LSEC fenestrae will allow for expedited investigation of their dynamics, molecular composition and functions to better understand their function in liver pathophysiology.
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Affiliation(s)
- Julie Di Martino
- INSERM, UMR1053, Bordeaux, F-33076, France.,Université de Bordeaux, Bordeaux, F-33076, France
| | - Patrice Mascalchi
- Université de Bordeaux, Bordeaux, F-33076, France.,Bordeaux Imaging Center, Bordeaux, F-33076, France
| | | | - Sabrina Lacomme
- Université de Bordeaux, Bordeaux, F-33076, France.,Bordeaux Imaging Center, Bordeaux, F-33076, France
| | - Etienne Gontier
- Université de Bordeaux, Bordeaux, F-33076, France.,Bordeaux Imaging Center, Bordeaux, F-33076, France
| | | | | | - Violaine Moreau
- INSERM, UMR1053, Bordeaux, F-33076, France.,Université de Bordeaux, Bordeaux, F-33076, France
| | - Frédéric Saltel
- INSERM, UMR1053, Bordeaux, F-33076, France.,Université de Bordeaux, Bordeaux, F-33076, France
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25
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Payre B, Gontier E, Jarray A, Martinez Y, Laugier JP, Delalleau A, Gaillard BM, Anselme I, Goudounèche D, Fourquaux I, Hemati M, Gerbaud V, Delisle MB, Guilbeau-Frugier C. A new HPF specimen carrier adapter for the use of high-pressure freezing with cryoscanning electron microscope: two applications: stearic acid organization in a hydroxypropyl methylcellulose matrix and mice myocardium. J Microsc 2018; 271:255-265. [PMID: 29901222 DOI: 10.1111/jmi.12713] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 11/09/2017] [Revised: 04/20/2018] [Accepted: 04/27/2018] [Indexed: 11/30/2022]
Abstract
Cryogenic transmission electron microscopy of high-pressure freezing (HPF) samples is a well-established technique for the analysis of liquid containing specimens. This technique enables observation without removing water or other volatile components. The HPF technique is less used in scanning electron microscopy (SEM) due to the lack of a suitable HPF specimen carrier adapter. The traditional SEM cryotransfer system (PP3000T Quorum Laughton, East Sussex, UK; Alto Gatan, Pleasanton, CA, USA) usually uses nitrogen slush. Unfortunately, and unlike HPF, nitrogen slush produces water crystal artefacts. So, we propose a new HPF specimen carrier adapter for sample transfer from HPF system to cryogenic-scanning electronic microscope (Cryo-SEM). The new transfer system is validated using technical two applications, a stearic acid in hydroxypropyl methylcellulose solution and mice myocardium. Preservation of samples is suitable in both cases. Cryo-SEM examination of HPF samples enables a good correlation between acid stearic liquid concentration and acid stearic occupation surface (only for homogeneous solution). For biological samples as myocardium, cytoplasmic structures of cardiomyocyte are easily recognized with adequate preservation of organelle contacts and inner cell organization. We expect this new HPF specimen carrier adapter would enable more SEM-studies using HPF.
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Affiliation(s)
- B Payre
- Centre de Microscopie Electronique Appliquée à la Biologie, Faculté de Médecine Rangueil, Toulouse III, P. Sabatier University, 31062, Toulouse, France
| | - E Gontier
- Bordeaux Imaging Center - UMS 3420-Université Bordeaux / CNRS / INSERM, F-33000, Bordeaux, France
| | - A Jarray
- LGC, INP, ENSIACET, 4 Allée Emile Monso, 31432, Toulouse, France
| | - Y Martinez
- CNRS, FR3450, Federation de recherche Agrobiosciences, Interactions, Biodiversité, BP 42617 Auzeville, F-31326, Castanet Tolosan, France
| | - J P Laugier
- Centre Commun de Microscopie Appliquée, Université de Nice-Sophia Antipolis, Nice, France
| | - A Delalleau
- Pixience, 12 rue Louis Courtois de Viçose, 31100, Toulouse, France
| | - B M Gaillard
- INRA, Centre Clermont-Ferrand - Theix, UMR1019, University of Clermont-Ferrand 1, UFR Médecine, UMR101, F-63000, Clermont-Ferrand, France
| | - I Anselme
- Centre de Microscopie Electronique Stéphanois - CMES-Saint Etienne, Université de Lyon, Saint-Etienne, France
| | - D Goudounèche
- Centre de Microscopie Electronique Appliquée à la Biologie, Faculté de Médecine Rangueil, Toulouse III, P. Sabatier University, 31062, Toulouse, France
| | - I Fourquaux
- Centre de Microscopie Electronique Appliquée à la Biologie, Faculté de Médecine Rangueil, Toulouse III, P. Sabatier University, 31062, Toulouse, France
| | - M Hemati
- LGC, INP, ENSIACET, 4 Allée Emile Monso, 31432, Toulouse, France
| | - V Gerbaud
- LGC, INP, ENSIACET, 4 Allée Emile Monso, 31432, Toulouse, France
| | - M B Delisle
- Centre de Microscopie Electronique Appliquée à la Biologie, Faculté de Médecine Rangueil, Toulouse III, P. Sabatier University, 31062, Toulouse, France.,CHU Toulouse and INSERM U 1037, Toulouse CEDEX, 31059, France
| | - C Guilbeau-Frugier
- Centre de Microscopie Electronique Appliquée à la Biologie, Faculté de Médecine Rangueil, Toulouse III, P. Sabatier University, 31062, Toulouse, France
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26
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Penen F, Isaure MP, Dobritzsch D, Bertalan I, Castillo-Michel H, Proux O, Gontier E, Le Coustumer P, Schaumlöffel D. Pools of cadmium in Chlamydomonas reinhardtii revealed by chemical imaging and XAS spectroscopy. Metallomics 2018; 9:910-923. [PMID: 28598481 DOI: 10.1039/c7mt00029d] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The green micro-alga Chlamydomonas reinhardtii is commonly used as a model to investigate metallic stress in photosynthetic organisms. The aim of this study was to explore processes implemented by three C. reinhardtii strains to cope with cadmium (Cd), and particularly to evidence Cd sequestration in the cell. For that, we used a combination of subcellular fractionation and chemical imaging (micro X-ray fluorescence (μXRF) and transmission electron microscopy (TEM/X-EDS)) to identify subcellular compartments of Cd accumulation, and X-ray absorption spectroscopy (XAS) to determine chemical Cd speciation. C. reinhardtii wild type strain 11/32b (wt), a newly design strain (pcs1) expressing a modified phytochelatin synthase in the chloroplast and a cell wall less strain CC400 (cw15) were exposed to 70 μM Cd. At this Cd concentration, cell vitality was not affected, however, the strains showed various strategies to cope with Cd stress. In wt, most of Cd was diffused in the whole cell, and complexed by thiol ligands, while the other part was associated with phosphate in vacuolar Ca polyphosphate granules. Thiol ligands increased with exposure time, confirming their important role in Cd stress. In pcs1, Cd was also present as vacuolar Ca polyphosphate granules, and diffused in the cell as Cd-thiol complexes. In addition, while it should be regarded with caution, a minor proportion of Cd complexed by carboxyl groups, was potentially provided by starch produced around the pyrenoid and in the chloroplast. Results suggested that pcs1 uses thiol compounds such as PC to a lesser extent for Cd sequestration than wt. In cw15, an excretion of Cd, Ca polyphosphate granules has to be considered. Finally, Cd was detected in the pyrenoid of all strains.
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Affiliation(s)
- F Penen
- Université de Pau et des Pays de l'Adour, CNRS, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux (IPREM), UMR 5254, Hélioparc, 2 avenue Pierre Angot, 64053 Pau, France.
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27
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van der Mee-Marquet NL, Bénéjat L, Diene SM, Lemaignen A, Gaïa N, Smet A, Haesebrouck F, Cherkaoui A, Ducournau A, Lacomme S, Gontier E, Bernard L, Mégraud F, Goudeau A, Lehours P, François P. A Potential New Human Pathogen Belonging to Helicobacter Genus, Identified in a Bloodstream Infection. Front Microbiol 2017; 8:2533. [PMID: 29326675 PMCID: PMC5741639 DOI: 10.3389/fmicb.2017.02533] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 12/05/2017] [Indexed: 01/20/2023] Open
Abstract
We isolated from aerobic and anaerobic blood culture bottles from a febrile patient, a Helicobacter-like Gram negative, rod-shaped bacterium that MALDI-TOF MS failed to identify. Blood agar cultures incubated in a microaerobic atmosphere revealed a motile Gram negative rod, which was oxidase, catalase, nitrate reductase, esterase, and alkaline phosphatase positive. It grew at 42°C with no detectable urease activity. Antimicrobial susceptibility testing showed that the organism was susceptible to beta-lactams, gentamicin, erythromycin, and tetracycline but resistant to ciprofloxacin. Electronic microscopy analysis revealed a 3 × 0.5 μm curved rod bacterium harboring two sheathed amphitrichous flagella. Whole genome sequencing revealed a genome 1,708,265 base-pairs long with a GC content of 37.80% and a total of 1,697 coding sequences. The genomic analyses using the nucleotide sequences of the 16S rRNA gene, hsp60 and gyrB genes, as well as the GyrA protein sequence, and the results of Average Nucleotide Identity and in silico DNA-DNA hybridization suggest evidence for a novel Helicobacter species close to Helicobacter equorum and belonging to the group of enterohepatic Helicobacter species. As soon as the particular peptide mass fingerprint of this pathogen is added to the spectral databases, MALDI-TOF MS technology will improve its identification from clinical specimens, especially in case of “sterile infection”. We propose to associate the present strain with the Latin name of the place of isolation; Caesarodunum (Tours, France) and suggest “Helicobacter caesarodunensis” for further description of this new bacterium.
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Affiliation(s)
- Nathalie L van der Mee-Marquet
- Service de Bactériologie, Virologie et Hygiène, Hôpital Trousseau, Réseau des Hygiénistes du Centre, CPIAS Centre Val de Loire, Centre Hospitalier Régional Universitaire, and UMR 1282 Infectiologie Santé Publique, Université François-Rabelais, Tours, France
| | - Lucie Bénéjat
- Laboratoire de Bactériologie, Centre National de Référence des Campylobacters et des Hélicobacters, Bordeaux, France
| | - Seydina M Diene
- Faculté de Médecine et de Pharmacie, URMITE, Aix-Marseille Université, UMR 63, Centre National de la Recherche Scientifique 7278, IRD 198, Institut National de la Santé et de la Recherche Médicale, IHU-Méditerranée Infection, Marseille, France
| | - Adrien Lemaignen
- Service de Médecine Interne et des Maladies Infectieuses, Centre Hospitalier Régional Universitaire, Hôpital Bretonneau, Tours, France
| | - Nadia Gaïa
- Genomic Research Laboratory, University Hospital of Geneva, Geneva, Switzerland
| | - Annemieke Smet
- Laboratory Experimental Medicine and Pediatrics, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Freddy Haesebrouck
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Abdessalam Cherkaoui
- Bacteriology Laboratory, Division of Laboratory Medicine, Geneva University Hospitals, Geneva, Switzerland
| | - Astrid Ducournau
- Laboratoire de Bactériologie, Centre National de Référence des Campylobacters et des Hélicobacters, Bordeaux, France
| | - Sabrina Lacomme
- Bordeaux Imaging Center, Imagerie Electronique, UMS 3420 Centre National de la Recherche Scientifique US4 Institut National de la Santé et de la Recherche Médicale Université de Bordeaux, Bordeaux, France
| | - Etienne Gontier
- Bordeaux Imaging Center, Imagerie Electronique, UMS 3420 Centre National de la Recherche Scientifique US4 Institut National de la Santé et de la Recherche Médicale Université de Bordeaux, Bordeaux, France
| | - Louis Bernard
- Service de Médecine Interne et des Maladies Infectieuses, Centre Hospitalier Régional Universitaire, Hôpital Bretonneau, Tours, France
| | - Francis Mégraud
- Laboratoire de Bactériologie, Centre National de Référence des Campylobacters et des Hélicobacters, Bordeaux, France
| | - Alain Goudeau
- Service de Bactériologie, Virologie et Hygiène, Hôpital Trousseau, Réseau des Hygiénistes du Centre, CPIAS Centre Val de Loire, Centre Hospitalier Régional Universitaire, and UMR 1282 Infectiologie Santé Publique, Université François-Rabelais, Tours, France
| | - Philippe Lehours
- Laboratoire de Bactériologie, Centre National de Référence des Campylobacters et des Hélicobacters, Bordeaux, France
| | - Patrice François
- Genomic Research Laboratory, University Hospital of Geneva, Geneva, Switzerland
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Mias C, Le Digabel J, Filiol J, Gontier E, Gravier E, Villaret A, Nocera T, Questel E, Rossi AB, Redoulès D, Josse G. Visualization of dendritic cells' responses in atopic dermatitis: Preventing effect of emollient. Exp Dermatol 2017; 27:374-377. [PMID: 29178515 DOI: 10.1111/exd.13470] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/20/2017] [Indexed: 11/27/2022]
Abstract
Atopic dermatitis (AD) is a chronic and multifactorial inflammatory skin disease involving various dendritic cells such as epidermal Langerhans cells (LC) and inflammatory dendritic epidermal cells (IDECs). Most of the clinical studies was performed on isolated cells, and thus, it would be useful to characterize directly on the human epidermal tissue the first cellular events occurred during the AD. The suction blister method was used to obtain whole epidermis samples and interstitial cutaneous fluids. Employing multiphoton microscopy, we analyzed the early dynamic behavior of inflammatory cells using Dermatophagoides pteronyssinus atopy patch test (Derp-APT) and evaluated the effects of emollient pre-application. Derp-APT application provoked rapid and strong infiltration of IDECs, and proliferation and activation of LC in the AD subjects' epidermis. Moreover, emollient pre-application strengthened the defective skin barrier and had positive effects on inflammatory cells' behavior, characterized by the complete inhibition of IDEC influx and the presence of immature LC.
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Affiliation(s)
- Céline Mias
- Skin Research Center, Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | - Jimmy Le Digabel
- Skin Research Center, Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | - Jérôme Filiol
- Skin Research Center, Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | - Etienne Gontier
- Bordeaux Imaging Center-UMS 3420 CNRS/Université de Bordeaux-US4 INSERM, Bordeaux, France
| | - Eléonore Gravier
- Skin Research Center, Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | - Aurélie Villaret
- Skin Research Center, Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | - Thérèse Nocera
- Skin Research Center, Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | - Emmanuel Questel
- Skin Research Center, Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | - Ana-Beatris Rossi
- Skin Research Center, Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | - Daniel Redoulès
- Skin Research Center, Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | - Gwendal Josse
- Skin Research Center, Pierre Fabre Dermo-Cosmétique, Toulouse, France
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29
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Deweirdt J, Quignard JF, Crobeddu B, Baeza-Squiban A, Sciare J, Courtois A, Lacomme S, Gontier E, Muller B, Savineau JP, Marthan R, Guibert C, Baudrimont I. Involvement of oxidative stress and calcium signaling in airborne particulate matter - induced damages in human pulmonary artery endothelial cells. Toxicol In Vitro 2017; 45:340-350. [PMID: 28688989 DOI: 10.1016/j.tiv.2017.07.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [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: 02/10/2017] [Revised: 06/19/2017] [Accepted: 07/04/2017] [Indexed: 11/30/2022]
Abstract
Recent studies have revealed that particulate matter (PM) exert deleterious effects on vascular function. Pulmonary artery endothelial cells (HPAEC), which are involved in the vasomotricity regulation, can be a direct target of inhaled particles. Modifications in calcium homeostasis and oxidative stress are critical events involved in the physiopathology of vascular diseases. The objectives of this study were to assess the effects of PM2.5 on oxidative stress and calcium signaling in HPAEC. Different endpoints were studied, (i) intrinsic and intracellular production of reactive oxygen species (ROS) by the H2DCF-DA probe, (ii) intrinsic, intracellular and mitochondrial production of superoxide anion (O2-) by electronic paramagnetic resonance spectroscopy and MitoSOX probe, (iii) reactive nitrosative species (RNS) production by Griess reaction, and (vi) calcium signaling by the Fluo-4 probe. In acellular conditions, PM2.5 leads to an intrinsic free radical production (ROS, O2-) and a 4h-exposure to PM2.5 (5-15μg/cm2), induced, in HPAEC, an increase of RNS, of global ROS and of cytoplasmic and mitochondrial O2- levels. The basal intracellular calcium ion level [Ca2+]i was also increased after 4h-exposure to PM2.5 and a pre-treatment with superoxide dismutase and catalase significantly reduced this response. This study provides evidence that the alteration of intracellular calcium homeostasis induced by PM2.5 is closely correlated to an increase of oxidative stress.
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Affiliation(s)
- J Deweirdt
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France
| | - J F Quignard
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France
| | - B Crobeddu
- Université Paris Diderot, Sorbonne Paris Cité, Unit of Functional and Adaptive Biology (BFA) UMR 8251 CNRS, F-75205 Paris, France
| | - A Baeza-Squiban
- Université Paris Diderot, Sorbonne Paris Cité, Unit of Functional and Adaptive Biology (BFA) UMR 8251 CNRS, F-75205 Paris, France
| | - J Sciare
- Laboratoire des Sciences du Climat et de l'Environnement (LSCE), CEA-CNRS, Centre de Saclay, F-91190 Gif sur Yvette, France; Energy Environment Water Research Center, The Cyprus Institute, 2121 Nicosia, Cyprus
| | - A Courtois
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France; Centre Hospitalier Universitaire de Bordeaux, Centre AntiPoison et de Toxicovigilance d'Aquitaine et de Poitou Charente et Service d'Exploration Fonctionnelle Respiratoire, Place Amélie Raba Léon, Bordeaux F-33076, France
| | - S Lacomme
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France; Bordeaux Imaging Center UMS 3420 CNRS - US4 INSERM, Pôle d'imagerie électronique, 146, rue Léo Saignat, Bordeaux F-33076, France
| | - E Gontier
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France; Bordeaux Imaging Center UMS 3420 CNRS - US4 INSERM, Pôle d'imagerie électronique, 146, rue Léo Saignat, Bordeaux F-33076, France
| | - B Muller
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France
| | - J P Savineau
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France
| | - R Marthan
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France; Centre Hospitalier Universitaire de Bordeaux, Centre AntiPoison et de Toxicovigilance d'Aquitaine et de Poitou Charente et Service d'Exploration Fonctionnelle Respiratoire, Place Amélie Raba Léon, Bordeaux F-33076, France
| | - C Guibert
- Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France
| | - I Baudrimont
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux F-33076, France.
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30
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Golinelli A, Chen X, Gontier E, Bussière B, Tcherbakoff O, Natile M, d'Oliveira P, Paul PM, Hergott JF. Original Ti:Sa 10 kHz front-end design delivering 17 fs, 170 mrad CEP stabilized pulses up to 5 W. Opt Lett 2017; 42:2326-2329. [PMID: 28614343 DOI: 10.1364/ol.42.002326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 05/23/2017] [Indexed: 06/07/2023]
Abstract
We present a compact 10 kHz Ti:Sa front end relying on an original double-crystal regenerative amplifier design. This new configuration optimizes the thermal heat load management, allowing the production of a 110 nm large spectrum and maintaining a good beam profile quality. The front end delivers up to 5 W after compression, 17 fs pulses with a 170 mrad shot-to-shot residual carrier-envelope phase noise.
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31
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Schaumlöffel D, Hutchinson R, Malherbe J, Coustumer PL, Gontier E, Isaure MP. Novel Methods for Bioimaging Including LA-ICP-MS, NanoSIMS, TEM/X-EDS, and SXRF. Metallomics 2016. [DOI: 10.1002/9783527694907.ch4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Dirk Schaumlöffel
- Université de Pau et des Pays de l'Adour, CNRS; Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux (IPREM); UMR 5254 64000 Pau France
| | - Robert Hutchinson
- Electro Scientific Industries; 8 Avro Court, Ermine Business Park Huntingdon, Cambridge PE29 6XS UK
| | - Julien Malherbe
- Université de Pau et des Pays de l'Adour, CNRS; Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux (IPREM); UMR 5254 64000 Pau France
| | - Philippe Le Coustumer
- Université de Bordeaux, UF Sciences de la Terre et Environnement; Allée G. Saint-Hillaire 33615 Pessac France
| | - Etienne Gontier
- Université de Bordeaux, Bordeaux Imaging Center; UMS 3420 CNRS - US4 INSERM, Pôle d'imagerie électronique; 146 rue Léo Saignat 33076 Bordeaux France
| | - Marie-Pierre Isaure
- Université de Pau et des Pays de l'Adour, CNRS; Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux (IPREM); UMR 5254 64000 Pau France
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32
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Penen F, Malherbe J, Isaure MP, Dobritzsch D, Bertalan I, Gontier E, Le Coustumer P, Schaumlöffel D. Chemical bioimaging for the subcellular localization of trace elements by high contrast TEM, TEM/X-EDS, and NanoSIMS. J Trace Elem Med Biol 2016; 37:62-68. [PMID: 27288221 DOI: 10.1016/j.jtemb.2016.04.014] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Accepted: 04/25/2016] [Indexed: 12/28/2022]
Abstract
Chemical bioimaging offers an important contribution to the investigation of biochemical functions, biosorption and bioaccumulation processes of trace elements via their localization at the cellular and even at the subcellular level. This paper describes the combined use of high contrast transmission electron microscopy (HC-TEM), energy dispersive X-ray spectroscopy (X-EDS), and nano secondary ion mass spectrometry (NanoSIMS) applied to a model organism, the unicellular green algae Chlamydomonas reinhardtii. HC-TEM providing a lateral resolution of 1nm was used for imaging the ultrastructure of algae cells which have diameters of 5-10μm. TEM coupled to X-EDS (TEM/X-EDS) combined textural (morphology and size) analysis with detection of Ca, P, K, Mg, Fe, and Zn in selected subcellular granules using an X-EDS probe size of approx. 1μm. However, instrumental sensitivity was at the limit for trace element detection. NanoSIMS allowed chemical imaging of macro and trace elements with subcellular resolution (element mapping). Ca, Mg, and P as well as the trace elements Fe, Cu, and Zn present at basal levels were detected in pyrenoids, contractile vacuoles, and granules. Some metals were even localized in small vesicles of about 200nm size. Sensitive subcellular localization of trace metals was possible by the application of a recently developed RF plasma oxygen primary ion source on NanoSIMS which has shown good improvements in terms of lateral resolution (below 50nm), sensitivity, and stability. Furthermore correlative single cell imaging was developed combining the advantages of TEM and NanoSIMS. An advanced sample preparation protocol provided adjacent ultramicrotome sections for parallel TEM and NanoSIMS analyses of the same cell. Thus, the C. reinhardtii cellular ultrastructure could be directly related to the spatial distribution of metals in different cell organelles such as vacuoles and chloroplast.
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Affiliation(s)
- Florent Penen
- Université de Pau et des Pays de l'Adour, CNRS, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les, Matériaux (IPREM), UMR 5254, 64000 Pau, France
| | - Julien Malherbe
- Université de Pau et des Pays de l'Adour, CNRS, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les, Matériaux (IPREM), UMR 5254, 64000 Pau, France
| | - Marie-Pierre Isaure
- Université de Pau et des Pays de l'Adour, CNRS, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les, Matériaux (IPREM), UMR 5254, 64000 Pau, France
| | - Dirk Dobritzsch
- Martin-Luther-Universität Halle-Wittenberg, Institute for Biochemistry and Biotechnology, Plant Biochemistry, Weinbergweg 22, 06120 Halle (Saale), Germany
| | - Ivo Bertalan
- Martin-Luther-Universität Halle-Wittenberg, Institute of Biology, Plant Physiology, Weinbergweg 22, 06120 Halle (Saale), Germany
| | - Etienne Gontier
- Université de Bordeaux, Bordeaux Imaging Center UMS 3420 CNRS - US4 INSERM, Pôle d'imagerie électronique, 146 rue Léo Saignat, 33076 Bordeaux, France
| | - Philippe Le Coustumer
- Université de Pau et des Pays de l'Adour, CNRS, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les, Matériaux (IPREM), UMR 5254, 64000 Pau, France; Université de Bordeaux, UF Sciences de la Terre et Environnement, Allée G. Saint-Hillaire, 33615 Pessac, France
| | - Dirk Schaumlöffel
- Université de Pau et des Pays de l'Adour, CNRS, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les, Matériaux (IPREM), UMR 5254, 64000 Pau, France.
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33
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Malherbe J, Penen F, Isaure MP, Frank J, Hause G, Dobritzsch D, Gontier E, Horréard F, Hillion F, Schaumlöffel D. A New Radio Frequency Plasma Oxygen Primary Ion Source on Nano Secondary Ion Mass Spectrometry for Improved Lateral Resolution and Detection of Electropositive Elements at Single Cell Level. Anal Chem 2016; 88:7130-6. [DOI: 10.1021/acs.analchem.6b01153] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Julien Malherbe
- Université de Pau et des Pays de l’Adour, CNRS, Institut
des Sciences Analytiques et de Physico-Chimie pour l’Environnement
et les Matériaux (IPREM), UMR 5254, 64000 Pau, France
| | - Florent Penen
- Université de Pau et des Pays de l’Adour, CNRS, Institut
des Sciences Analytiques et de Physico-Chimie pour l’Environnement
et les Matériaux (IPREM), UMR 5254, 64000 Pau, France
| | - Marie-Pierre Isaure
- Université de Pau et des Pays de l’Adour, CNRS, Institut
des Sciences Analytiques et de Physico-Chimie pour l’Environnement
et les Matériaux (IPREM), UMR 5254, 64000 Pau, France
| | - Julia Frank
- Martin-Luther Universität Halle-Wittenberg, Institute
for Biochemistry and Biotechnology, Plant Biochemistry, Weinbergweg 22, 06120 Halle (Saale), Germany
| | - Gerd Hause
- Martin-Luther-Universität Halle-Wittenberg, Biozentrum, Weinbergweg 22, 06120 Halle (Saale), Germany
| | - Dirk Dobritzsch
- Martin-Luther Universität Halle-Wittenberg, Institute
for Biochemistry and Biotechnology, Plant Biochemistry, Weinbergweg 22, 06120 Halle (Saale), Germany
| | - Etienne Gontier
- Université de Bordeaux, Bordeaux Imaging Center UMS 3420 CNRS -
US4 INSERM, Pôle d’Imagerie Électronique, 146 Rue Léo Saignat, 33076 Bordeaux, France
| | | | | | - Dirk Schaumlöffel
- Université de Pau et des Pays de l’Adour, CNRS, Institut
des Sciences Analytiques et de Physico-Chimie pour l’Environnement
et les Matériaux (IPREM), UMR 5254, 64000 Pau, France
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34
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Dussault C, Gontier E, Verret C, Soret M, Boussuges A, Hedenstierna G, Montmerle-Borgdorff S. Hyperoxia and hypergravity are independent risk factors of atelectasis in healthy sitting humans: a pulmonary ultrasound and SPECT/CT study. J Appl Physiol (1985) 2016; 121:66-77. [DOI: 10.1152/japplphysiol.00085.2016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 04/18/2016] [Indexed: 11/22/2022] Open
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35
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Schiltz S, Gaillard I, Pawlicki-Jullian N, Thiombiano B, Mesnard F, Gontier E. A review: what is the spermosphere and how can it be studied? J Appl Microbiol 2015; 119:1467-81. [PMID: 26332271 DOI: 10.1111/jam.12946] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [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: 05/19/2015] [Revised: 07/27/2015] [Accepted: 08/15/2015] [Indexed: 11/27/2022]
Abstract
The spermosphere is the zone surrounding seeds where interactions between the soil, microbial communities and germinating seeds take place. The concept of the spermosphere is usually only applied during germination sensu stricto. Despite the transient nature of this very small zone of soil around the germinating seed, the microbial activities which occur there may have long-lasting impacts on plants. The spermosphere is indirectly characterized by either (i) seed exudates, which could be inhibitors or stimulators of micro-organism growth or (ii) the composition of the microbiome on and around the germinating seeds. The microbial communities present in the spermosphere directly reflect that of the germination medium or are host-dependent and influenced quantitatively and qualitatively by host exudates. Despite its strong impact on the future development of plants, the spermosphere remains little studied. This can be explained by the technical difficulties related to characterizing this concept due to its short duration, small size and biomass, and the number and complexity of the interactions that take place. However, recent technical methods, such as metabolite profiling, combining phenotypic methods with DNA- and RNA-based methods, could be used to investigate seed exudates, microbial communities and their interactions with the soil environment.
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Affiliation(s)
- S Schiltz
- Biologie des Plantes et Innovation (BIOPI), Université de Picardie Jules Verne, Amiens, France
| | - I Gaillard
- Biologie des Plantes et Innovation (BIOPI), Université de Picardie Jules Verne, Amiens, France
| | - N Pawlicki-Jullian
- Biologie des Plantes et Innovation (BIOPI), Université de Picardie Jules Verne, Amiens, France
| | - B Thiombiano
- Biologie des Plantes et Innovation (BIOPI), Université de Picardie Jules Verne, Amiens, France
| | - F Mesnard
- Biologie des Plantes et Innovation (BIOPI), Université de Picardie Jules Verne, Amiens, France
| | - E Gontier
- Biologie des Plantes et Innovation (BIOPI), Université de Picardie Jules Verne, Amiens, France
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Lefrançois P, Ibarboure E, Payré B, Gontier E, Le Meins JF, Schatz C. Insights into Carbopol gel formulations: Microscopy analysis of the microstructure and the influence of polyol additives. J Appl Polym Sci 2015. [DOI: 10.1002/app.42761] [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] [Indexed: 11/06/2022]
Affiliation(s)
- Pauline Lefrançois
- CNRS, LCPO; UMR 5629, F-33607 Pessac France
- University of Bordeaux, LCPO; UMR 5629, F-33607 Pessac France
| | - Emmanuel Ibarboure
- CNRS, LCPO; UMR 5629, F-33607 Pessac France
- University of Bordeaux, LCPO; UMR 5629, F-33607 Pessac France
| | - Bruno Payré
- Centre de Microscopie Electronique Appliquée à la Biologie, Faculté de Médecine Rangueil, Toulouse III, Université P. Sabatier; 31062 Toulouse France
| | - Etienne Gontier
- Bordeaux Imaging Center, UMS 3420 CNRS - Université de Bordeaux; US 4 INSERM, F-33076 Bordeaux France
| | - Jean-François Le Meins
- CNRS, LCPO; UMR 5629, F-33607 Pessac France
- University of Bordeaux, LCPO; UMR 5629, F-33607 Pessac France
| | - Christophe Schatz
- CNRS, LCPO; UMR 5629, F-33607 Pessac France
- University of Bordeaux, LCPO; UMR 5629, F-33607 Pessac France
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Dimopoulou M, Vuillemin M, Campbell-Sills H, Lucas PM, Ballestra P, Miot-Sertier C, Favier M, Coulon J, Moine V, Doco T, Roques M, Williams P, Petrel M, Gontier E, Moulis C, Remaud-Simeon M, Dols-Lafargue M. Exopolysaccharide (EPS) synthesis by Oenococcus oeni: from genes to phenotypes. PLoS One 2014; 9:e98898. [PMID: 24901216 PMCID: PMC4047060 DOI: 10.1371/journal.pone.0098898] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 05/08/2014] [Indexed: 11/24/2022] Open
Abstract
Oenococcus oeni is the bacterial species which drives malolactic fermentation in wine. The analysis of 50 genomic sequences of O. oeni (14 already available and 36 newly sequenced ones) provided an inventory of the genes potentially involved in exopolysaccharide (EPS) biosynthesis. The loci identified are: two gene clusters named eps1 and eps2, three isolated glycoside-hydrolase genes named dsrO, dsrV and levO, and three isolated glycosyltransferase genes named gtf, it3, it4. The isolated genes were present or absent depending on the strain and the eps gene clusters composition diverged from one strain to another. The soluble and capsular EPS production capacity of several strains was examined after growth in different culture media and the EPS structure was determined. Genotype to phenotype correlations showed that several EPS biosynthetic pathways were active and complementary in O. oeni. Can be distinguished: (i) a Wzy -dependent synthetic pathway, allowing the production of heteropolysaccharides made of glucose, galactose and rhamnose, mainly in a capsular form, (ii) a glucan synthase pathway (Gtf), involved in β-glucan synthesis in a free and a cell-associated form, giving a ropy phenotype to growth media and (iii) homopolysaccharide synthesis from sucrose (α-glucan or β-fructan) by glycoside-hydrolases of the GH70 and GH68 families. The eps gene distribution on the phylogenetic tree was examined. Fifty out of 50 studied genomes possessed several genes dedicated to EPS metabolism. This suggests that these polymers are important for the adaptation of O. oeni to its specific ecological niche, wine and possibly contribute to the technological performance of malolactic starters.
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Affiliation(s)
- Maria Dimopoulou
- Université de Bordeaux, Institut polytechnique de Bordeaux, ISVV, EA 4577, Unité de recherche Oenologie, INRA USC 1366, Villenave d’Ornon, France
| | - Marlène Vuillemin
- Université de Toulouse, INSA, UPS, INP, INRA, CNRS, LISBP, Toulouse, France
| | - Hugo Campbell-Sills
- Université de Bordeaux, Institut polytechnique de Bordeaux, ISVV, EA 4577, Unité de recherche Oenologie, INRA USC 1366, Villenave d’Ornon, France
| | - Patrick M. Lucas
- Université de Bordeaux, Institut polytechnique de Bordeaux, ISVV, EA 4577, Unité de recherche Oenologie, INRA USC 1366, Villenave d’Ornon, France
| | - Patricia Ballestra
- Université de Bordeaux, Institut polytechnique de Bordeaux, ISVV, EA 4577, Unité de recherche Oenologie, INRA USC 1366, Villenave d’Ornon, France
| | - Cécile Miot-Sertier
- Université de Bordeaux, Institut polytechnique de Bordeaux, ISVV, EA 4577, Unité de recherche Oenologie, INRA USC 1366, Villenave d’Ornon, France
| | - Marion Favier
- BioLaffort, research subsidiary of the Laffort Group, Bordeaux, France
| | - Joana Coulon
- BioLaffort, research subsidiary of the Laffort Group, Bordeaux, France
| | - Virginie Moine
- BioLaffort, research subsidiary of the Laffort Group, Bordeaux, France
| | - Thierry Doco
- INRA, UMR1083, Sciences pour l’œnologie, Montpellier, France
| | - Maryline Roques
- INRA, UMR1083, Sciences pour l’œnologie, Montpellier, France
| | | | - Melina Petrel
- Université de Bordeaux, Bordeaux Imaging Center, UMS 3420 CNRS - US4 INSERM, Bordeaux, France
| | - Etienne Gontier
- Université de Bordeaux, Bordeaux Imaging Center, UMS 3420 CNRS - US4 INSERM, Bordeaux, France
| | - Claire Moulis
- Université de Toulouse, INSA, UPS, INP, INRA, CNRS, LISBP, Toulouse, France
| | | | - Marguerite Dols-Lafargue
- Université de Bordeaux, Institut polytechnique de Bordeaux, ISVV, EA 4577, Unité de recherche Oenologie, INRA USC 1366, Villenave d’Ornon, France
- * E-mail:
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Cholet C, Delsart C, Petrel M, Gontier E, Grimi N, L'hyvernay A, Ghidossi R, Vorobiev E, Mietton-Peuchot M, Gény L. Structural and biochemical changes induced by pulsed electric field treatments on Cabernet Sauvignon grape berry skins: impact on cell wall total tannins and polysaccharides. J Agric Food Chem 2014; 62:2925-34. [PMID: 24617601 DOI: 10.1021/jf404804d] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Pulsed electric field (PEF) treatment is an emerging technology that is arousing increasing interest in vinification processes for its ability to enhance polyphenol extraction performance. The aim of this study was to investigate the effects of PEF treatment on grape skin histocytological structures and on the organization of skin cell wall polysaccharides and tannins, which, until now, have been little investigated. This study relates to the effects of two PEF treatments on harvested Cabernet Sauvignon berries: PEF1 (medium strength (4 kV/cm); short duration (1 ms)) and PEF2 (low intensity (0.7 kV/cm); longer duration (200 ms)). Histocytological observations and the study of levels of polysaccharidic fractions and total amounts of tannins allowed differentiation between the two treatments. Whereas PEF1 had little effect on the polyphenol structure and pectic fraction, PEF2 profoundly modified the organization of skin cell walls. Depending on the PEF parameters, cell wall structure was differently affected, providing variable performance in terms of polyphenol extraction and wine quality.
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Affiliation(s)
- Céline Cholet
- Université de Bordeaux, Institut des Sciences de la Vigne et du Vin , EA 4577, Unité de recherche œnologie, France
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Delsart C, Cholet C, Ghidossi R, Grimi N, Gontier E, Gény L, Vorobiev E, Mietton-Peuchot M. Effects of Pulsed Electric Fields on Cabernet Sauvignon Grape Berries and on the Characteristics of Wines. FOOD BIOPROCESS TECH 2013. [DOI: 10.1007/s11947-012-1039-7] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Pernin M, Gontier E, Tuleja E, Ukkola-Pons E, Alsac JM, Algayres JP, Carmoi T. [An abnormal PET-CT in a febrile man]. Rev Med Interne 2013; 34:242-4. [PMID: 23294732 DOI: 10.1016/j.revmed.2012.11.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Accepted: 11/26/2012] [Indexed: 10/27/2022]
Affiliation(s)
- M Pernin
- Service d'imagerie médicale, hôpital d'instruction des armées Legouest, 57000 Metz, France.
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41
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Wassilieff S, Cazoulat A, Bohand S, Merat F, Gontier E, Gagna G, Amabile JC, Laroche P. Évaluation de l’exposition interne aux rayonnements ionisants du personnel du service de médecine nucléaire du Val-de-Grâce. ARCH MAL PROF ENVIRO 2012. [DOI: 10.1016/j.admp.2012.09.008] [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: 10/27/2022]
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42
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Bonardel G, Carmoi T, Gontier E, Lecoules S, Cambon A, Foehrenbach H, Algayres JP. Apport de la tomographie par émission de positons dans la prise en charge de la sarcoïdose. Rev Med Interne 2011; 32:101-8. [DOI: 10.1016/j.revmed.2010.07.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Revised: 07/29/2010] [Accepted: 07/30/2010] [Indexed: 10/19/2022]
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43
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Vaylet F, Margery J, Bonardel G, Le Floch H, Rivière F, Gontier E, Ngampolo I, Mairovitz A, Marotel C, Foehrenbach H. [What is the role of FDG-PET in thoracic oncology in 2010?]. Rev Pneumol Clin 2010; 66:221-238. [PMID: 20933164 DOI: 10.1016/j.pneumo.2010.07.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2010] [Accepted: 06/28/2010] [Indexed: 05/30/2023]
Abstract
18F-Fluorodeoxyglucose-Positron Emission Tomography (FGD-PET) has been considered to have a major impact on the management of lung malignancies since the beginning of this century. Its value has been demonstrated by many publications, meta-analysis and European/American/Japanese recommendations. PET combined with computed tomography has provided useful information regarding the diagnosis and staging of lung cancer and allows for the delivery of adaptive radiotherapy. In its more common uses, PET has been shown to be cost-effective. With the widespread use of new radiotracers, PET will play an increasing role in the evaluation of response to treatment.
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Affiliation(s)
- F Vaylet
- Service des maladies respiratoires, hôpital d'instruction des armées Percy, 92140 Clamart, France.
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Poullias X, Gontier E, Dechaud C, Fœhrenbach H, Bonardel G. « Du gris clair au gris foncé… » Exploration de la carcinose péritonéale par TEP-TDM. Médecine Nucléaire 2010. [DOI: 10.1016/j.mednuc.2010.05.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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45
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Alberini JL, Lerebours F, Wartski M, Fourme E, Le Stanc E, Gontier E, Madar O, Cherel P, Pecking AP. 18F-fluorodeoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) imaging in the staging and prognosis of inflammatory breast cancer. Cancer 2009; 115:5038-47. [PMID: 19645022 DOI: 10.1002/cncr.24534] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jean-Louis Alberini
- Nuclear Medicine Department, Cancer Research Center Rene Huguenin, Saint-Cloud, France.
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46
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Bonardel G, Chargari C, Gontier E, Bauduceau O, Soret M, Dechaud C, Fayolle M, Foehrenbach H. [Positron emission tomography in the management of cervix cancer patients]. Cancer Radiother 2009; 13:490-8. [PMID: 19699130 DOI: 10.1016/j.canrad.2009.06.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2009] [Revised: 06/05/2009] [Accepted: 06/10/2009] [Indexed: 11/26/2022]
Abstract
Since its introduction in clinical practice in the 1990's, positron emission tomography (PET), usually with (18)F-fluoro-2-deoxy-D-glucose ((18)F-FDG), has become an important imaging modality in patients with cancer. For cervix carcinoma, FDG-PET is significantly more accurate than computed tomography (CT) and is recommended for loco-regional lymph node and extrapelvic staging. The metabolic dimension of the technique provides additional prognostic information. Ongoing studies now concentrate on more advanced clinical applications, such as the planning of radiotherapy, the response evaluation after the induction of therapy, the early detection of recurrence. Technical innovations, such as PET cameras with better spatial resolution and hybrid positron emission tomography/computed tomography (PET-CT), available now on the whole territory, provide both anatomic and metabolic information in the same procedure. From the point of view of biological metabolism, new radiopharmaceutical probes are being developed. Those hold promise for future refinements in this field. This article reviews the current applications of FDG-PET in patients with cervix cancer.
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Affiliation(s)
- G Bonardel
- Service de Médecine Nucléaire, Hôpital d'Instruction des Armées du Val-de-Grâce, 75230 Paris cedex 05, France.
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47
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Gontier E, Ynsa MD, Bíró T, Hunyadi J, Kiss B, Gáspár K, Pinheiro T, Silva JN, Filipe P, Stachura J, Dabros W, Reinert T, Butz T, Moretto P, Surlève-Bazeille JE. Is there penetration of titania nanoparticles in sunscreens through skin? A comparative electron and ion microscopy study. Nanotoxicology 2009. [DOI: 10.1080/17435390802538508] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [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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48
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Nlandu Mputu M, Rhazi L, Vasseur G, Vu TD, Gontier E, Thomasset B. Identification of a potential bottleneck in branched chain fatty acid incorporation into triacylglycerol for lipid biosynthesis in agronomic plants. Biochimie 2009; 91:703-10. [PMID: 19327383 DOI: 10.1016/j.biochi.2009.03.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2008] [Accepted: 03/13/2009] [Indexed: 10/21/2022]
Abstract
In plant, unusual fatty acids are produced by a limited number of species. The industrial benefits of these unusual structures have led several groups to study their production in transgenic plants. Their research results led to very modest accumulation in seeds which was largely due to a limited knowledge of the lipid metabolism and fatty acid transfer in plants. More specifically we need to better understand the substrate specificity and selectivity of acyltransferases which are required for the incorporation of these unusual fatty acids into storage triacylglycerols. In our studies we have compared the incorporation of [(14)C] Oleoyl-CoA and Branched Chain Acyls-CoA into [(3)H] LPA-C18:1 by the Lysophosphatidic acid Acyltransferase (LPAAT) from developing seeds of agronomic plants (flax (Linum usitatissimum) and rape (Brassica napus)) and from a plant capable of producing high amounts of hydroxy fatty acids (castor bean (Ricinus communis)). Our assays demonstrate that LPAATs of the three studied species (1) incorporated preferentially oleyl-CoA, (2) could incorporate cyclopropane acyl-CoA when added alone as a substrate, however very weakly for rapeseed and castor bean seeds, (3) presented a low capacity to incorporate methyl branched acyl-CoA when added alone as a substrate (4) weakly incorporated cyclopropane acyl-CoA and was unable to incorporate methyl branched acyl-CoA when presented with an equimolar mix of oleyl-CoA and branched chain acyl-CoA. In all cases, the LPAAT had a low affinity for branched chain acyl-CoAs. The results show that LPAAT activity from agronomic plants constitutes a bottleneck for the incorporation of branched Chain acyl-CoA into PA.
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Affiliation(s)
- M Nlandu Mputu
- UMR CNRS, Université de Technologie de Compiègne, France
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49
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Arachiche A, Augereau O, Decossas M, Pertuiset C, Gontier E, Letellier T, Dachary-Prigent J. Localization of PTP-1B, SHP-2, and Src exclusively in rat brain mitochondria and functional consequences. J Biol Chem 2008; 283:24406-11. [PMID: 18583343 PMCID: PMC3259839 DOI: 10.1074/jbc.m709217200] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2007] [Accepted: 06/24/2008] [Indexed: 11/06/2022] Open
Abstract
An immunodetection study of protein tyrosine phosphatase 1B (PTP-1B), SHP-2, and Src in isolated mitochondria from different rat tissues (brain, muscle, heart, liver, and kidney) revealed their exclusive localization in the brain. Given this result, we sought whether mitochondria respond to ATP and to the general tyrosine phosphatase inhibitor orthovanadate and found little or no change in the tyrosine phosphorylation profile of mitochondria from muscle, heart, liver, and kidney. In contrast, ATP induced an enhancement in the tyrosine-phosphorylated protein profile of brain mitochondria, which was further greatly enhanced with orthovanadate and which disappeared when Src was inhibited with two inhibitors: PP2 and PP1. Importantly, we found that in brain mitochondria, ATP addition induced Src autophosphorylation at Tyr-416 in its catalytic site, leading to its activation, whereas the regulatory Tyr-527 site remained unphosphorylated. Functional implications were addressed by measurements of the enzymatic activity of each of the oxidative phosphorylation complexes in brain mitochondria in the presence of ATP. We found an increase in complex I, III, and IV activity and a decrease in complex V activity, partially reversed by Src inhibition, demonstrating that the complexes are Src substrates. These results complemented and reinforced our initial study showing that respiration of brain mitochondria was partially dependent on tyrosine phosphorylation. Therefore, the present data suggest a possible control point in the regulation of respiration by tyrosine phosphorylation of the complexes mediated by Src auto-activation.
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Affiliation(s)
- Amal Arachiche
- INSERM-U688 Physiopathologie
Mitochondriale and the Service Commun
Microscopie, Pôle Microscopie Electronique, University Victor
Ségalen-Bordeaux 2, 146 rue Léo Saignat, F-33076 Bordeaux-Cedex,
France
| | - Olivier Augereau
- INSERM-U688 Physiopathologie
Mitochondriale and the Service Commun
Microscopie, Pôle Microscopie Electronique, University Victor
Ségalen-Bordeaux 2, 146 rue Léo Saignat, F-33076 Bordeaux-Cedex,
France
| | - Marion Decossas
- INSERM-U688 Physiopathologie
Mitochondriale and the Service Commun
Microscopie, Pôle Microscopie Electronique, University Victor
Ségalen-Bordeaux 2, 146 rue Léo Saignat, F-33076 Bordeaux-Cedex,
France
| | - Claire Pertuiset
- INSERM-U688 Physiopathologie
Mitochondriale and the Service Commun
Microscopie, Pôle Microscopie Electronique, University Victor
Ségalen-Bordeaux 2, 146 rue Léo Saignat, F-33076 Bordeaux-Cedex,
France
| | - Etienne Gontier
- INSERM-U688 Physiopathologie
Mitochondriale and the Service Commun
Microscopie, Pôle Microscopie Electronique, University Victor
Ségalen-Bordeaux 2, 146 rue Léo Saignat, F-33076 Bordeaux-Cedex,
France
| | - Thierry Letellier
- INSERM-U688 Physiopathologie
Mitochondriale and the Service Commun
Microscopie, Pôle Microscopie Electronique, University Victor
Ségalen-Bordeaux 2, 146 rue Léo Saignat, F-33076 Bordeaux-Cedex,
France
| | - Jeanne Dachary-Prigent
- INSERM-U688 Physiopathologie
Mitochondriale and the Service Commun
Microscopie, Pôle Microscopie Electronique, University Victor
Ségalen-Bordeaux 2, 146 rue Léo Saignat, F-33076 Bordeaux-Cedex,
France
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Veríssimo A, Alves LC, Filipe P, Silva JN, Silva R, Ynsa MD, Gontier E, Moretto P, Pallon J, Pinheiro T. Nuclear microscopy: A tool for imaging elemental distribution and percutaneous absorption in vivo. Microsc Res Tech 2007; 70:302-9. [PMID: 17262781 DOI: 10.1002/jemt.20402] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Nuclear microscopy is a technique based on a focused beam of accelerated particles that has the ability of imaging the morphology of the tissue in vivo and of producing the correspondent elemental maps, whether in major, minor, or trace concentrations. These characteristics constitute a strong advantage in studying the morphology of human skin, its elemental distributions and the permeation mechanisms of chemical compounds. In this study, nuclear microscopy techniques such as scanning transmission ion microscopy and particle induced X-ray emission were applied simultaneously, to cryopreserved human skin samples with the purpose of obtaining high-resolution images of cells and tissue morphology. In addition, quantitative elemental profiling and mapping of phosphorus, calcium, chlorine, and potassium in skin cross-sections were obtained. This procedure accurately distinguishes the epidermal strata and dermis by overlapping in real time the elemental information with density images obtained from the transmitted beam. A validation procedure for elemental distributions in human skin based on differential density of epidermal strata and dermis was established. As demonstrated, this procedure can be used in future studies as a tool for the in vivo examination of trans-epidermal and -dermal delivery of products.
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Affiliation(s)
- Ana Veríssimo
- LFI, Instituto Tecnológico e Nuclear, Sacavém and Centro de Física Nuclear, Universidade de Lisboa, Lisboa, Portugal
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