Abstract
We investigated the interaction between T lymphocytes and macrophages in the vitro sensitization of lymphocytes against tumor cells. Spleen cells were sensitized in vitro by syngeneic peritoneal macrophages that had been fed with cell-free antigen preparation of syngeneic tumor cells. The sensitized T lymphocytes acquired specific cytotoxic cells. The sensitized T lymphocytes acquired specific cytotoxic activity in vitro and the capacity to inhingeneic fibroblasts, or the antigen preparation by itself were not able to sensitize the lymphocytes against the tumor.
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