Abstract：
:Non-specific antibody production usually accompanies the T-cell-regulated B-cell response. In this paper the mechanisms involved in non-MHC-restricted T-B-cell interaction were studied. As previously shown for NK cells, activated B cells induce IFN-gamma and TNF alpha production in non-MHC-restricted cytotoxic T lymphocytes (NrCTL). Using an in vitro model system, we demonstrate that direct cell-cell interactions are required to induce these cytokines in NrCTL. Receptor ligand systems involved are leucocyte function antigen-1/intercellular adhesion molecule-1 (LFA-1/ICAM-1)(CD11a, CD18/CD54), T11/LFA-3 (CD2/CD58), and the clonotypic T-cell receptor (TCR) structure NKTa of JT9/JT10 with its non-MHC-related target antigen TNKtar (4F2). Cytokine production can be induced by activating monoclonal antibodies against CD2R. Antibodies against the clonotypic TCR (NKTa) or CD3 had no cytokine-inducing effect on NrCTL cultured alone, but were able to retrieve the effect of blocking the target antigen on co-cultured B cells. We could further demonstrate that the inhibition of the TCR/target antigen interaction could be overcome by close cell-cell contact culture conditions. From these findings it is concluded that the role of the TCR in non-MHC-restricted cell-cell interaction is to facilitate LFA-1/ICAM-1-mediated effector target adhesion in a specific way rather than to mediate direct activating signals upon lymphokine production or cytotoxicity.
journal_name
Scand J Immunoljournal_title
Scandinavian journal of immunologyauthors
Becker JC,Dummer R,Von Wussow P,Burg G,Schmidt REdoi
10.1111/j.1365-3083.1992.tb03089.xkeywords:
subject
Has Abstractpub_date
1992-08-01 00:00:00pages
177-81issue
2eissn
0300-9475issn
1365-3083journal_volume
36pub_type
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