PMID- 9246566 OWN - NLM STAT- MEDLINE DCOM- 19970929 LR - 20191024 IS - 0882-0139 (Print) IS - 0882-0139 (Linking) VI - 26 IP - 4 DP - 1997 Jun TI - Transforming growth factor-beta 1 induces antigen-specific unresponsiveness in naive T cells. PG - 459-72 AB - Transforming growth factor-beta 1 (TGF-beta 1) is a cytokine with complex immunomodulatory effects including the ability to inhibit the onset or severity of autoimmune disease. This study was designed to test the possibility that one mechanism by which TGF-beta 1 exerts its immunosuppressive effects is by inducing antigen (Ag)-specific unresponsiveness in CD4+ cells. TGF-beta 1 was shown here to inhibit the Ag-specific proliferation of naive CD4+ cells from T cell receptor (TCR) transgenic mice. More importantly, the naive CD4+ cells exposed to TGF-beta 1 and Ag, but not to TGF-beta 1 alone, in primary cultures were unable to proliferate or secrete IL-2 in response to a subsequent Ag challenge following removal of TGF-beta 1 from the cultures. Anti-CD28 mAb partially blocked the Ag-specific inactivation induced by TGF-beta 1 in naive CD4+ cells. The inhibitory effects of TGF-beta 1 on CD4+ cells are not mediated by alterations in APC costimulation since TGF-beta 1 did not inhibit the Ag-induced expression of MHC class II molecules, CD80 or CD86 on splenic APC. Taken together, the results suggest that the immunosuppressive activities of TGF-beta 1 encompass direct induction of Ag-specific unresponsiveness in naive CD4+ cells. FAU - Gilbert, K M AU - Gilbert KM AD - University of Arkansas for Medical Sciences, Little Rock 72205, USA. FAU - Thoman, M AU - Thoman M FAU - Bauche, K AU - Bauche K FAU - Pham, T AU - Pham T FAU - Weigle, W O AU - Weigle WO LA - eng GR - A111576/PHS HHS/United States GR - AG09948/AG/NIA NIH HHS/United States GR - AG12908/AG/NIA NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PT - Research Support, U.S. Gov't, P.H.S. PL - England TA - Immunol Invest JT - Immunological investigations JID - 8504629 RN - 0 (Antigens) RN - 0 (Antigens, CD) RN - 0 (B7-1 Antigen) RN - 0 (B7-2 Antigen) RN - 0 (Cd86 protein, mouse) RN - 0 (Histocompatibility Antigens Class II) RN - 0 (Immunosuppressive Agents) RN - 0 (Interleukin-2) RN - 0 (Membrane Glycoproteins) RN - 0 (Receptors, Antigen, T-Cell) RN - 0 (Transforming Growth Factor beta) SB - IM MH - Animals MH - Antigens MH - Antigens, CD/metabolism MH - B7-1 Antigen/metabolism MH - B7-2 Antigen MH - CD4-Positive T-Lymphocytes/*drug effects/*immunology MH - Cells, Cultured MH - Histocompatibility Antigens Class II/metabolism MH - Immune Tolerance MH - Immunosuppressive Agents/pharmacology MH - Interleukin-2/metabolism MH - Lymphocyte Activation MH - Male MH - Membrane Glycoproteins/metabolism MH - Mice MH - Mice, Inbred A MH - Mice, Transgenic MH - Receptors, Antigen, T-Cell/genetics/metabolism MH - Transforming Growth Factor beta/*pharmacology/physiology EDAT- 1997/06/01 00:00 MHDA- 1997/06/01 00:01 CRDT- 1997/06/01 00:00 PHST- 1997/06/01 00:00 [pubmed] PHST- 1997/06/01 00:01 [medline] PHST- 1997/06/01 00:00 [entrez] AID - 10.3109/08820139709022702 [doi] PST - ppublish SO - Immunol Invest. 1997 Jun;26(4):459-72. doi: 10.3109/08820139709022702.