MHC antigens in interferon gamma (IFN gamma) receptor deficient mice: IFN gamma-dependent up-regulation of MHC class II in renal tubules.

Détails

ID Serval
serval:BIB_D8DF11B731B4
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
MHC antigens in interferon gamma (IFN gamma) receptor deficient mice: IFN gamma-dependent up-regulation of MHC class II in renal tubules.
Périodique
Kidney International
Auteur(s)
Haas C., Ryffel B., Aguet M., Le Hir M.
ISSN
0085-2538 (Print)
ISSN-L
0085-2538
Statut éditorial
Publié
Date de publication
1995
Volume
48
Numéro
6
Pages
1721-1727
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
MHC class II gene products in parenchymal cells, such as tubular epithelial cells in kidney, may play a role in the regulation of autoimmune reactions. Expression of MHC class II in renal tubular cells is normally very low, but it increases considerably under various pathologic conditions. The predominant role of IFN gamma in up-regulation of MHC class II expression has been demonstrated repeatedly. We tested the existence of alternative pathways of MHC class II regulation using IFN gamma receptor-deficient (IFN gamma R-/-) mice. Mutant and wild type mice received 50 micrograms bacterial endotoxin (LPS) i.p. Four days later the kidneys were removed for immunofluorescence examination. In agreement with published results LPS provoked an increase of immunoreactivity for MHC class I and MHC class II in proximal tubules of wild type mice. While MHC class I up-regulation was strictly IFN gamma receptor-dependent, up-regulation of MHC II was still evident in mutant mice, although less than in wild type mice. Since injection of IFN gamma induced proximal tubular MHC class II expression in wild type mice but not in IFN gamma R-/- mice, an alternative signaling pathway for IFN gamma does not seem to exist. Thus, up-regulation of MHC class II expression in renal tubules does not necessarily require IFN gamma. The markedly patchy pattern of immunofluorescence in IFN gamma R-/- mice suggests that induction of MHC class II after LPS injection may represent renal injury due to shock.
Mots-clé
Animals, Antigens, CD, Antigens, CD14/metabolism, Base Sequence, Female, Genes, MHC Class I/drug effects, Genes, MHC Class I/physiology, Genes, MHC Class II/drug effects, Genes, MHC Class II/physiology, Immunohistochemistry, Interferon-gamma/pharmacology, Kidney Tubules, Proximal/drug effects, Kidney Tubules, Proximal/metabolism, Lipopolysaccharides/pharmacology, Mice, Mice, Inbred Strains, Molecular Sequence Data, Receptors, Interferon/deficiency, Up-Regulation
Pubmed
Web of science
Open Access
Oui
Création de la notice
28/01/2008 12:36
Dernière modification de la notice
09/05/2019 1:58
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