44 resultados para Le Sage, Alain René, 1668-1747.
em DI-fusion - The institutional repository of Université Libre de Bruxelles
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Weekly injections of Concanavalin A (Con A) were performed in BALB/c mice to evaluate the pattern of cytokine production and liver injury. High serum levels of tumor necrosis factor alpha (TNF-alpha), interleukin 2 (IL-2), IL-4, and interferon gamma (IFN-gamma) were found in the serum after the first 2 injections of Con A but rapidly decreased from the third injection. Conversely, IL-10 serum levels after repeated Con A challenge increased by 7 times from week 1 to 20. In vivo depletion studies indicated that CD4(+) T cells are essential in IL-10 production. Hepatocyte necrosis was only observed after the first injections of Con A whereas centrilobular inflammatory infiltrates persisted up to 20 weeks. Perisinusoidal liver fibrosis was also increasingly detected in BALB/c mice, whereas no fibrous change was observed in nude mice after 6 weeks of Con A challenge. The number of stellate cells, detected by immunostaining, increased after 20 weeks of Con A injections. Liver cytokine messenger RNA (mRNA) expression after 20 weeks showed expression of transforming growth factor beta1 (TGF-beta1), IL-10, and IL-4 whereas IL-2 was no more expressed. The present study shows that mice repeatedly injected with Con A develop liver fibrosis. The cytokine-release pattern observed after 1 injection of Con A is rapidly shifted towards an immunomodulatory phenotype characterized by the systemic production of large amounts of IL-10.
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BACKGROUND & AIMS: Eosinophils are observed in several liver diseases, but their contribution in the pathogenesis of these disorders remains poorly investigated. Concanavalin A (Con A)-induced hepatitis is an experimental model of immune-mediated liver injury in which natural killer T (NKT) cells play a critical role through the production of interleukin (IL)-4 and the expression of Fas ligand (FasL). Because activated NKT cells also produce IL-5, a critical cytokine for eosinophil maturation and function, the role of IL-5 was investigated in this model. METHODS: IL-5-deficient mice, eosinophil depletion in wild-type (WT) mice, and NKT cell transfer from WT- or IL-5-deficient mice into NKT cell-deficient mice were used to assess the role of IL-5 and eosinophils. RESULTS: Liver eosinophil infiltrate and IL-5 production were observed after Con A challenge. Liver injury was dramatically reduced in IL-5-deficient or eosinophil-depleted mice. In addition, residual hepatitis observed in Fas-deficient mice was abolished after IL-5 neutralization. Finally, we showed that NKT cells constituted a critical source of IL-5. Indeed, transfer of WT NKT cells to mice lacking NKT cells restored liver injury, whereas transfer of IL-5-deficient NKT cells did not. CONCLUSIONS: These observations highlight the pathologic role of IL-5 and eosinophils in experimental immune-mediated hepatitis.
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Édition d'un reçu de taxe copte inédit des Musées royaux d'Art et d'Histoire de Bruxelles. Réédition de deux reçus de taxe similaires. Corrections à d'autres textes déjà édités. Les documents proviennent de la région thébaine et datent de la première moitié du 8e siècle.
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Étude des termes qui désignent le scorpion en égyptien ancien. Il apparaît que deux mots principaux sont utilisés, qui se retrouvent en copte, mais dans des dialectes différents. L'un des termes est utilisé dans le Delta, l'autre plus au sud. Cette répartition géographique semble remonter aux époques antérieures.
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Présentation de l'organisation du monastère de Baouît, à travers notamment la documentation écrite.
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Publication des peintures et inscriptions des murs nord et est du narthex de l'église rupestre du Deir Abou Hennis
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Catalogue de l'exposition d'esquisses et de photographies créée au Cercle des Voyageurs à Bruxelles du 9 novembre au 1er décembre 2007.
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info:eu-repo/semantics/published
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info:eu-repo/semantics/published
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info:eu-repo/semantics/published
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info:eu-repo/semantics/published
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info:eu-repo/semantics/published
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Publication d'un papyrus inédit de la collection de Duke University contenant un extrait du Psaume 90 en copte; le papyrus a probablement servi d'amulette
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Identification et réédition d'une inscription copte fragmentaire portant le texte du Notre-Père. L'inscription était peinte à l'intérieur d'une maison adossée à un mur du temple de Ramsès III à Médinet Abou, devenu le village de Djèmé à l'époque chrétienne.
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Édition de trois inscriptions (une grecque, une copte et une bilingue grec-copte) de la montagne thébaine. La première porte le texte du symbole de Nicée Constantinople, la deuxième une invocation et la troisième une invocation et une date.