Cell interactions between histoincompatible T and B lymphocytes. VIII. In vivo cooperative responses between lymphocytes are controlled by genes in the K-end of the H-2 complex.

The genetic restrictions for successful carrier-primed T cell and hapten-primed B cell cooperative interactions were established in a totally in vivo double adoptive transfer system. In complementation experiments, we have demonstrated that genes localized in the K-end of the H-2 complex control successful T-B cell cooperative interactions. Thus, DBA/2 KLH-primed T cells cooperated with (C3H times C3H.OH)F1 and (C3H times C3H.OL)F1 DNP-primed B cells to make a secondary response to DNP-KLH, but not with (C3H times C3H.A)F1 DNP-PRImed cells. The presence of foreign histocompatibility determinants on the F1 B cells did not prevent successful physiologic cell cooperation provided the T and B cells shared common cell interaction genes coded for in the K-end of the H-2 complex.