Detection of Complement-Dependent Antibody to Tumor Cells in Sera of Strain-2 Guinea Pigs Cured of Their Tumors by BCG Treatment

Abstract
Sera of strain-2 guinea pigs (cured of line-10 tumor by BCG therapy) were tested for complement-dependent, cytotoxic antibody. About 30% of the sera tested contained significant cytotoxic activity with the addition of human, but not syngeneic, complement. Using papain pretreated line-lO cells, we detected antibody in about 50% of the sera with syngeneic sera as the source of complement. Antibody to line-10 was also demonstrated in selected sera by indirect fluore,scence and the C1 fixation and transfer test.

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