[Growth control of experimental tumour. I. Host protection against tumour by previous inoculation of plasmatic membrane of tumour cell (author's transl)].

Proteins from plasmatic membrane of ascites and solid 20-methylcholantrene induced tumours cells in inbred mice and rats were obtained by isolation of vesicles of tumor cell membranes produced in glycerol solution. The tumour cells were not broken. In a syngeneic system the inoculation of the prepared protein with adjuvant resulted in protection of 50 to 100% of animals against challenge with a syngeneic tumour cells. The same results were obtained with Ehrlich ascites tumour. The lymphocyte cytotoxicity and blastic transformation of lymphocytes in immunized animals suggested a cellular cytotoxic immunity mediated by tumour specific antigen or perhaps by fetal antigen.