|
||
(TGF-
)-dependent
Inhibition of T Helper Cell 2 (Th2)-induced Autoimmunity
by Self-Major Histocompatibility Complex (MHC)
Class II-specific, Regulatory CD4+ T Cell Lines
By
From the Institut National de la Sante et de la Recherche Medicale U28, Institut Fédératif de
Recherche 30, Université Paul Sabatier, 31059 Toulouse, France
Autoreactive anti-MHC class II T cells are found in Brown Norway (BN) and Lewis (LEW)
rats that receive either HgCl2 or gold salts. These T cells have a T helper cell 2 (Th2) phenotype in the former strain and are responsible for Th2-mediated autoimmunity. In contrast,
T cells that expand in LEW rats produce IL-2 and prevent experimental autoimmune encephalomyelitis, a cell-mediated autoimmune disease. The aim of this work was to investigate, using T cell lines derived from HgCl2-injected LEW rats (LEWHg), the effect of these autoreactive
T cells on the development of Th2-mediated autoimmunity. The five LEWHg T cell lines obtained protect against Th2-mediated autoimmunity induced by HgCl2 in (LEW × BN)F1 hybrids. The lines produce, in addition to IL-2, IFN-
and TGF-
, and the protective effect is
TGF-
dependent since protection is abrogated by anti-TGF-
treatment. These results identify regulatory, TGF-
-producing, autoreactive T cells that are distinct from classical Th1 or
Th2 and inhibit both Th1- and Th2-mediated autoimmune diseases.
This article has been cited by other articles:
| TABLE OF CONTENTS |
|