title: [Factors contributing to the impairment of cellular immunity in cancer patients (author's transl)].
abstract: Factors contributing to the impairment of cell-mediated immunity in cancer patients were studied. Normal plasma enhanced the PHA-induced transformation of cancer lymphocytes. Cancer plasma suppressed the transformation of normal lymphocytes. The plasma factor(s), which might play an important role in the impairment of cell-mediated immunity in cancer, was further characterized to be heat-labile, being completely destroyed at 56 degrees C for 30 minutes. It was present on the surface of T lymphocytes, and was partially removable by digestion with 0.05% Bacto-trypsin. Moreover, the percentage of T cells in the peripheral blood of cancer patients was lower than that of normal as determined by the anti-human thymocyte serum cytotoxicity test and the spontaneous rosette forming test.
mesh_terms: D000368:Aged; D000961:Antilymphocyte Serum; D003601:Cytotoxicity Tests, Immunologic; D005260:Female; D006358:Hot Temperature; D006801:Humans; D007111:Immunity, Cellular; D008213:Lymphocyte Activation; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000276:immunology*; D012397:Rosette Formation; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000961:Antilymphocyte Serum