Abstract:
:We previously reported that the CD4+ suppressor cells (Ts) that regulate recovery of Lewis rats from experimental autoimmune encephalomyelitis (EAE) produce transforming growth factor-beta (TGF-beta). We also reported that TGF-beta downregulates interferon-gamma (IFN-gamma), but not interleukin-2 (IL-2) production, by the CD4+ effector T cells (Te) that mediate EAE. We now report that TGF-beta also inhibits the production of tumor necrosis factor/lymphotoxin (TNF/LT) by EAE effector cells. When activated in vitro with myelin basic protein (MBP), Te produced TNF/LT, as measured using a WEHI 164 cytotoxicity assay. The specificity of cytokine action was demonstrated using neutralizing antibodies to TNF/LT. When added to the Te+MBP cultures, TGF-beta inhibited TNF/LT production in a dose-dependent fashion. Moreover, neutralizing anti-TGF-beta antibodies augmented TNF/LT production in the Te+MBP cultures. We also confirm that TGF-beta inhibits adoptive transfer of EAE. In contrast, murine IL-10 only partially inhibited TNF/LT and IFN-gamma production by Te. We conclude that TGF-beta production by Ts plays a major role in recovery from EAE in the Lewis rat by inhibiting TNF/LT and IFN-gamma production by the effector cells that mediate EAE.
journal_name
J Neuroimmunoljournal_title
Journal of neuroimmunologyauthors
Stevens DB,Gould KE,Swanborg RHdoi
10.1016/0165-5728(94)90131-7subject
Has Abstractpub_date
1994-04-01 00:00:00pages
77-83issue
1eissn
0165-5728issn
1872-8421pii
0165-5728(94)90131-7journal_volume
51pub_type
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