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Chevalier M, Trabanelli S, Gharbi D, Cesson V, Domingos-Pereira S, Dartiguenave F, Fritschi A, Speiser D, Romero P, Jandus C, Nardelli-Haefliger D, Derré L, Jichlinski P. Analyse de l’infiltration immunitaire au cours des instillations intravésicales de BCG : identification d’un profil immunosuppressif prédictif de la récidive tumorale. Prog Urol 2016. [DOI: 10.1016/j.purol.2016.07.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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52
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Rodríguez-Ruiz A, Castillo M, Garayoa J, Chevalier M. Further results on the evaluation of the performance of a digital breast tomosynthesis system in the clinical environment. Phys Med 2016. [DOI: 10.1016/j.ejmp.2016.07.731] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Rodríguez-Ruiz A, Castillo M, Garayoa J, Chevalier M. Evaluation of the technical performance of three different commercial digital breast tomosynthesis systems in the clinical environment. Phys Med 2016; 32:767-77. [PMID: 27180118 DOI: 10.1016/j.ejmp.2016.05.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Revised: 04/13/2016] [Accepted: 05/04/2016] [Indexed: 10/21/2022] Open
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54
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Chevalier M, Laffaille P, Ferdy JB, Grenouillet G. Measurements of spatial population synchrony: influence of time series transformations. Oecologia 2015; 179:15-28. [DOI: 10.1007/s00442-015-3331-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Accepted: 04/25/2015] [Indexed: 11/28/2022]
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Lin M, Chevalier M, Lek S, Zhang L, Gozlan RE, Liu J, Zhang T, Ye S, Li W, Li Z. Eutrophication as a driver of r-selection traits in a freshwater fish. JOURNAL OF FISH BIOLOGY 2014; 85:343-354. [PMID: 24925695 DOI: 10.1111/jfb.12426] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Accepted: 04/11/2014] [Indexed: 06/03/2023]
Abstract
This study tested whether eutrophication could influence life-history traits of a cyprinid, Chanodichthys erythropterus, in 10 Chinese lakes. Using the von Bertalanffy growth model, the asymptotic length (L∞ ) and the growth performance index (IGRO ) were significantly affected by eutrophication. The gonado-somatic index (IG ) and relative fecundity (FR ) were significantly lower in mesotrophic lakes than in eutrophic and hypertrophic lakes. These results indicate that increasing eutrophication affects the life-history tactics of a freshwater fish.
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Rajon E, Desouhant E, Chevalier M, Débias F, Menu F. The Evolution of Bet Hedging in Response to Local Ecological Conditions. Am Nat 2014; 184:E1-15. [DOI: 10.1086/676506] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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57
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Chin W, Chevalier M, Thon R, Pollet R, Ceponkus J, Crépin C. Photochemistry of glycolaldehyde in cryogenic matrices. J Chem Phys 2014; 140:224319. [DOI: 10.1063/1.4881605] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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58
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Ruck G, Vallee P, Bailloux L, Martinez H, Strohl M, Pommier J, Lopez P, Faro G, Hamelin D, Joly A, Couedel L, Aroul T, Bousquet J, Martinez-Buthaud D, Meriot S, Bardet M, Leprevost I, Marquet E, Wanquet K, Boijoux C, Boudinelle J, Changeur J, Chevalier M, Chretien M, Courtin D, Donze G, Dourmap D, Du Breuillac B, Dupuis J, Huberdeau P, Jigau I, Legendre C, Marmin D, Marty A, Monier F, Mouchikhine J, Neau E, Perault J, Pradeau M, Prigent J, Rassineux L, Renelier B, Ruck H, Soubeiran P, Strohl M, Tromas B, Varoux P. Conditions de travail et santé des salarié(e)s des services d’aide à la personne à domicile en vienne. ARCH MAL PROF ENVIRO 2014. [DOI: 10.1016/j.admp.2014.03.111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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59
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Noel G, Chevalier M, Minodier P, Laporte R, Merrot T, Viudes G. SFP CO-05 - Anémies occultes aux urgences pédiatriques : prévalence et qualité du dépistage. Arch Pediatr 2014. [DOI: 10.1016/s0929-693x(14)71918-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Paz-Vinas I, Comte L, Chevalier M, Dubut V, Veyssiere C, Grenouillet G, Loot G, Blanchet S. Combining genetic and demographic data for prioritizing conservation actions: insights from a threatened fish species. Ecol Evol 2013; 3:2696-710. [PMID: 24567833 PMCID: PMC3930054 DOI: 10.1002/ece3.645] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 05/16/2013] [Accepted: 05/19/2013] [Indexed: 11/20/2022] Open
Abstract
Prioritizing and making efficient conservation plans for threatened populations requires information at both evolutionary and ecological timescales. Nevertheless, few studies integrate multidisciplinary approaches, mainly because of the difficulty for conservationists to assess simultaneously the evolutionary and ecological status of populations. Here, we sought to demonstrate how combining genetic and demographic analyses allows prioritizing and initiating conservation plans. To do so, we combined snapshot microsatellite data and a 30-year-long demographic survey on a threatened freshwater fish species (Parachondrostoma toxostoma) at the river basin scale. Our results revealed low levels of genetic diversity and weak effective population sizes (<63 individuals) in all populations. We further detected severe bottlenecks dating back to the last centuries (200–800 years ago), which may explain the differentiation of certain populations. The demographic survey revealed a general decrease in the spatial distribution and abundance of P. toxostoma over the last three decades. We conclude that demo-genetic approaches are essential for (1) identifying populations for which both evolutionary and ecological extinction risks are high; and (2) proposing conservation plans targeted toward these at risk populations, and accounting for the evolutionary history of populations. We suggest that demo-genetic approaches should be the norm in conservation practices. We combined genetic and demographic data from a threatened freshwater fish species (Parachondrostoma toxostoma) at the river basin scale for conservation purposes. Genetic diversity and effective population sizes are very low, probably due to the strong genetic bottlenecks detected in this study. The species spatial distribution and abundance also decreased during the last decades.
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Debillon T, Chevalier M, Ego A, Cneude F. Neuroprotection par hypothermie lors des encéphalopathies anoxo-ischémiques. Arch Pediatr 2013. [DOI: 10.1016/s0929-693x(13)71385-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Alcaix F, Chevalier M, Lucas G, Ribault A, Sterdyniak J. Addictions et travail – Quel rôle pour les professionnels de santé au travail ? ARCH MAL PROF ENVIRO 2012. [DOI: 10.1016/j.admp.2012.03.273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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63
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Chevalier M, Gilbert G, Lory P, Marthan R, Quignard JF, Savineau JP. Dehydroepiandrosterone (DHEA) inhibits voltage-gated T-type calcium channels. Biochem Pharmacol 2012; 83:1530-9. [PMID: 22391268 DOI: 10.1016/j.bcp.2012.02.025] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Revised: 02/24/2012] [Accepted: 02/24/2012] [Indexed: 01/22/2023]
Abstract
BACKGROUND AND PURPOSE Dehydroepiandrosterone (DHEA) and its sulfated form, DHEAS, are the most abundant steroid hormones in the mammalian blood flow. DHEA may have beneficial effects in various pathophysiological conditions such as cardiovascular diseases or deterioration of the sense of well-being. However to date, the cellular mechanism underlying DHEA action remains elusive and may involve ion channel modulation. In this study, we have characterized the effect of DHEA on T-type voltage-activated calcium channels (T-channels), which are involved in several cardiovascular and neuronal diseases. KEY RESULTS Using the whole-cell patch-clamp technique, we demonstrate that DHEA inhibits the three recombinant T-channels (Ca(V)3.1, Ca(V)3.2 and Ca(V)3.3) expressed in NG108-15 cell line, as well as native T-channels in pulmonary artery smooth muscle cells. This effect of DHEA is both concentration (IC(50) between 2 and 7μM) and voltage-dependent and results in a significant shift of the steady-state inactivation curves toward hyperpolarized potentials. Consequently, DHEA reduces window T-current and inhibits membrane potential oscillations induced by Ca(V)3 channels. DHEA inhibition is not dependent on the activation of nuclear androgen or estrogen receptors and implicates a PTX-sensitive Gi protein pathway. Functionally, DHEA and the T-type inhibitor NNC 55-0396 inhibited KCl-induced contraction of pulmonary artery rings and their effect was not cumulative. CONCLUSIONS Altogether, the present data demonstrate that DHEA inhibits T-channels by a Gi protein dependent pathway. DHEA-induced alteration in T-channel activity could thus account for its therapeutic action and/or physiological effects.
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Cortey A, Berry M, Pernot F, Lattes F, Galiay JC, Chevalier M. Photothérapie : critères d’indication et choix des modalités. Arch Pediatr 2011. [DOI: 10.1016/s0929-693x(11)70950-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Gallard A, Mallet R, Chevalier M, Grapin A. Limited elimination of two viruses by cryotherapy of pelargonium apices related to virus distribution. CRYO LETTERS 2011; 32:111-122. [PMID: 21766140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The possibility of eradicating the pelargonium flower break virus (PFBV) and pelargonium line pattern virus (PLPV) by cryotherapy of axillary shoot apices was investigated using five Pelargonium cultivars. Viruses were detected by DAS-ELISA and their location was determined by immunolocalization. Apex culture did not permit elimination of PFBV and only 15 percent regenerated plants of 'Stellar Artic' cultivar were ELISA PLPV-negative. Plants regenerated from cryotherapy-treated apices were tested by DAS-ELISA after a 3-month in vitro culture period. Viruses were not detected in 25 percent and 50 percent of the plants tested for PFBV and PLPV, respectively. However, immunolocalization carried out on apices originating from cryopreserved shoot tips sampled from DAS-ELISA negative plants showed that they were still virus-infected. Using immunolocalization, PFBV and PLPV could be detected in Pelargonium apices, even in the meristematic dome. However, viral particles were more numerous in basal zone cells than in meristematic cells. Our results demonstrate that PFBV and PLPV are present within meristematic cells and that cryopreservation can partly reduce the quantity of these viruses in Pelargonium plants but not eliminate them totally. Additional knowledge on localization and behaviour of viruses during cryopreservation is essential to optimize cryotherapy and plant genetic resource management.
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Chevalier M, Dantras E, Tonon C, Guigue P, Lacabanne C, Puig C, Durin C. Correlation between sub-Tgrelaxation processes and mechanical behavior for different hydrothermal ageing conditions in epoxy assemblies. J Appl Polym Sci 2010. [DOI: 10.1002/app.31253] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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67
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Chevalier M, Pyo A, Jolin JS, Addo M, Kwon DS, Toth I, Walker B, Streeck H. P16-31. Skewed HIV-1-specific CD4+ Th2 helper cell contribution in progressive HIV-1 infection. Retrovirology 2009. [PMCID: PMC2767760 DOI: 10.1186/1742-4690-6-s3-p260] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Giocondi MC, Ronzon F, Nicolai MC, Dosset P, Milhiet PE, Chevalier M, Le Grimellec C. Organization of influenza A virus envelope at neutral and low pH. J Gen Virol 2009; 91:329-38. [DOI: 10.1099/vir.0.015156-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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69
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Streeck H, Kwon D, Jolin JS, Trocha K, Chevalier M, Caron T, Law K, Pyo A, Toth I, Kaufmann DE, Rodig SJ, Walker BD, Altfeld M. OA031-04. Impairment of HIV-1-specific CD8+ T cell function by soluble epithelial adhesion molecules. Retrovirology 2009. [PMCID: PMC2767543 DOI: 10.1186/1742-4690-6-s3-o22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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70
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Chevalier M, Mironneau C, Macrez N, Quignard J. Intracellular Ca2+ oscillations induced by over-expressed CaV3.1 T-type Ca2+ channels in NG108-15 cells. Cell Calcium 2008; 44:592-603. [DOI: 10.1016/j.ceca.2008.04.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2008] [Revised: 04/04/2008] [Accepted: 04/28/2008] [Indexed: 11/29/2022]
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Antzenberger J, Blanc F, Lucas G, Chevalier M, Arnaud G, Guiraud J. L’application de la réforme dans les servicesde santé au travail. État des lieux. ARCH MAL PROF ENVIRO 2006. [DOI: 10.1016/s1775-8785(06)78228-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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72
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Lucas G, Limame M, Arnaud G, Blavette M, Bouet P, Bacle V, Jouffe E, Rodriguez M, Martinelli C, Chevalier M. Équipes Médicalisées en Santé au travail. ARCH MAL PROF ENVIRO 2006. [DOI: 10.1016/s1775-8785(06)78291-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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73
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Cadot Y, Miñana Castelló M, Chevalier M. Flavan-3-ol compositional changes in grape berries (Vitis vinifera L. cv Cabernet Franc) before veraison, using two complementary analytical approaches, HPLC reversed phase and histochemistry. Anal Chim Acta 2006. [DOI: 10.1016/j.aca.2006.01.063] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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74
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Poulsen RD, Bentien A, Chevalier M, Iversen BB. X-ray charge density of a new magnetic metal organic framework, Mn 3(C 8O 4H 3) 3(C 5H 11ON) 2. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305081936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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75
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Morán P, Chevalier M, Ten JI, Fernández Soto JM, Vañó E. A survey of patient dose and clinical factors in a full-field digital mammography system. RADIATION PROTECTION DOSIMETRY 2005; 114:375-9. [PMID: 15933140 DOI: 10.1093/rpd/nch514] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
In this work, we analyse the dose to 5034 patients (20 137 images) who underwent mammographic examinations with a full-field digital mammography (FFDM) system over a 2-y period. The information relevant to this study has been extracted from the image Digital Imaging and Communications in Medicine (DICOM) headers. Entrance surface air-kerma (ESAK) without backscatter and average glandular dose (AGD) were estimated following the methodology proposed in the European Protocol on Dosimetry in Mammography. Mean values for patient age and compressed breast thickness were 56 +/- 11 y and 52 +/- 13 mm, respectively. The mean ESAK value was 8.1 mGy and the mean AGD was 1.9 mGy. In addition, the dose values from both FFDM and screening-film mammographic (SFM) examinations were compared. The third quartile (TQ) of the ESAK values delivered by the FFDM system was 33% lower and 32% higher than the TQ for SFM with slow and fast screen/film receptors. Differences between dose values for cranio-caudal (CC) and medio-lateral oblique (MLO) images (about 27% for SFM) decreased to 11% for FFDM.
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