The Journal of Immunology, Vol 130, Issue 3 1033-1037, Copyright © 1983 by American Association of Immunologists

ARTICLES

Use of I region-restricted, antigen-specific T cell hybridomas to produce idiotypically specific anti-receptor antibodies

J White, KM Haskins, P Marrack and J Kappler

Murine T cell hybridomas bearing receptors for antigen plus I region gene products were used as immunogens in mice in an effort to raise anti-receptor antisera. The antisera were assayed for anti-receptor activity by the ability to inhibit interleukin 2 production by the T cell hybridomas stimulated by antigen and I region expressing antigen- presenting cells. The T cell hybridomas used in these experiments were made by fusing antigen-specific, I region-restricted BALB/c T cell blasts to the AKR thymoma, BW5147. Three groups of mice were immunized with the T cell hybridomas: (BALB/c X AKR)F1 animals, syngeneic to the hybridoma; (BALB.B X aKR)F1 animals, differing from the hybridomas at H2; and (C.B20 X AKR)F1 animals, differing from the hybridomas at Igh. Mice were immunized multiple times and sera from individual animals were assayed for anti-receptor antibodies. In all groups, some mice produced anti-receptor antibodies by the criterion that they were inhibitory in the assay mentioned above. The frequency of mice producing these inhibitory antibodies varied considerably between groups, with the (BALB.B X AKR)F1 animals producing these antibodies most frequently, and the (BALB/c X AKR)F1 animals producing them least often. All inhibitory antisera were idiotypically specific; they inhibited the response of the immunizing T cell hybridomas, but not the responses of closely related hybridomas with different specificities. Moreover, when they could be absorbed, the inhibitory antibodies could only be absorbed by the immunizing hybridoma. It is hoped that these antisera, and B cell hybridomas prepared from the immunized animals, will be useful in the elucidation of the structure of the receptors for antigen plus I region products on T cells.

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