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<title lang=en>Inorganic arsenic impairs proliferation and cytokine expression in human primary T lymphocytes.</title>
<creator>Morzadec, Claudie</creator>
<creator>Bouezzedine, Fidaa</creator>
<creator>Macoch, Mélinda</creator>
<creator>Fardel, Olivier</creator>
<creator>Vernhet, Laurent</creator>
<contributor>Contaminants Chimiques, immunité et Inflammation ; Institut de recherche, santé, environnement et travail [Rennes] (Irset) ; Université d'Angers (UA) - Université des Antilles et de la Guyane (UAG) - Université de Rennes 1 (UR1) - École des Hautes Études en Santé Publique [EHESP] (EHESP) - Institut National de la Santé et de la Recherche Médicale (INSERM) - Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ) - Université d'Angers (UA) - Université des Antilles et de la Guyane (UAG) - Université de Rennes 1 (UR1) - École des Hautes Études en Santé Publique [EHESP] (EHESP) - Institut National de la Santé et de la Recherche Médicale (INSERM) - Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )</contributor>
<contributor>Institut de recherche, santé, environnement et travail [Rennes] (Irset) ; Université d'Angers (UA) - Université des Antilles et de la Guyane (UAG) - Université de Rennes 1 (UR1) - École des Hautes Études en Santé Publique [EHESP] (EHESP) - Institut National de la Santé et de la Recherche Médicale (INSERM) - Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )</contributor>
<contributor>Contaminants Chimiques, immunité et Inflammation ; Service d'Hématologie, Immunologie et de Thérapie Cellulaire (HITC) ; Université de Rennes 1 (UR1) - Hôpital Pontchaillou - CHU Pontchaillou [Rennes] - Université de Rennes 1 (UR1) - Hôpital Pontchaillou - CHU Pontchaillou [Rennes] - Institut de recherche, santé, environnement et travail [Rennes] (Irset) ; Université d'Angers (UA) - Université des Antilles et de la Guyane (UAG) - Université de Rennes 1 (UR1) - École des Hautes Études en Santé Publique [EHESP] (EHESP) - Institut National de la Santé et de la Recherche Médicale (INSERM) - Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ) - Université d'Angers (UA) - Université des Antilles et de la Guyane (UAG) - École des Hautes Études en Santé Publique [EHESP] (EHESP) - Institut National de la Santé et de la Recherche Médicale (INSERM) - Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )</contributor>
<description>International audience</description>
<source>ISSN: 0300-483X</source>
<source>Toxicology</source>
<publisher>Elsevier</publisher>
<identifier>inserm-00872848</identifier>
<identifier>http://www.hal.inserm.fr/inserm-00872848</identifier>
<source>http://www.hal.inserm.fr/inserm-00872848</source>
<source>Toxicology, Elsevier, 2012, 300 (1-2), pp.46-56. 〈10.1016/j.tox.2012.05.025〉</source>
<identifier>DOI : 10.1016/j.tox.2012.05.025</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.tox.2012.05.025</relation>
<identifier>PUBMED : 22683347</identifier>
<relation>info:eu-repo/semantics/altIdentifier/pmid/22683347</relation>
<language>en</language>
<subject lang=en>Arsenic</subject>
<subject lang=en>T lymphocytes</subject>
<subject lang=en>Proliferation</subject>
<subject lang=en>Cytokines</subject>
<subject lang=en>Stress</subject>
<subject>[SDV.BC] Life Sciences [q-bio]/Cellular Biology</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Inorganic arsenic is a toxic environmental contaminant to which humans are mainly exposed through drinking water. This metalloid impairs functions of several key immune cells. Particularly, it reduces IL-2 secretion and proliferation of blood peripheral mononuclear cells stimulated by lectins that, however, do not mimic physiological T cell activation. The present study used isolated human T cells activated, in a more physiological manner, through stimulation with CD3/CD28 antibodies, to carefully analyze the impact of arsenic on T cell proliferation and cytokine expression. We demonstrate that non cytotoxic concentrations of sodium arsenite (As(III), 0.25-2μM) significantly reduce T cell proliferation by increasing the percentage of non dividing cells blocked in G1 phase and by preventing cyclin D3 and CDC25A expression. They also markedly, although not totally, reduces IL-2 expression at both mRNA and protein levels; however, metalloid-dependent inhibition of T cells could not be reversed by addition of recombinant IL-2. In addition, As(III) markedly reduces secretion of interferon-γ without impairing that of IL-4 and IL-13; it also decreases interferon-γ mRNA levels but increases those of IL-13. Finally, simultaneously to its immune effects, As(III) rapidly and potently increases expression of the redox-sensitive genes HMOX1, NQO1 and GCLM in activated T cells without altering the levels of reactive oxygen species. In conclusion, our results demonstrate that As(III) inhibits T cell proliferation, independently of IL-2, and alters the Th balance of cytokines secreted by co-stimulated T cells which thus constitute direct targets of this major environmental contaminant.</description>
<date>2012-10-09</date>
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