The Journal of Immunology, Vol 149, Issue 1 9-16, Copyright © 1992 by American Association of Immunologists

ARTICLES

Murine AIDS superantigen reactivity of the T cells bearing V beta 5 T cell antigen receptor

O Kanagawa, BA Nussrallah, ME Wiebenga, KM Murphy, HC Morse 3d and FR Carbone
Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110.

A B cell line, B6-1710, that expresses the defective virus known to induce murine AIDS stimulates a large fraction of nonprimed splenic T cells. Analysis of the T cell population responding to the B6-1710 for TCR V beta-chain usage revealed that, in addition to the previously reported V beta 5-chain-positive T cells, T cells bearing V beta 11 and V beta 12 are also specifically enriched. We have established V beta 5+ T cell lines, clones, and hybridomas expressing identical TCR with different CD4/CD8 phenotypes and demonstrated that T cell reactivity to B6-1710 is, although not absolute, dependent on the presence of CD4 molecules. Further analysis of T cell hybridomas with known J beta- chain usage revealed that D beta- and J beta-chain usage do not play crucial roles in T cell reactivity to B6-1710 B cells. However, T cell hybridomas derived from TCR-V beta gene transgenic mice were found to be heterogeneous for their reactivity to B6-1710, suggesting that the V alpha-chains associating with the transgenic V beta-chain determine T cell responsiveness to B6-1710. These data clearly demonstrate that T cell reactivity to a murine AIDS virus expressing B cell line resembles that previously reported for Mls-like superantigens.

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