Peculiarities of primary humoral immune response in mice with cytostatic disease.

Single intraperitoneal injection of cyclophosphamide in a maximum permissible dose (250 mg/kg) followed by immunization wih thymus-dependent antigen (sheep erythrocytes) markedly suppressed the formation of antibody-producing cells in the spleen, especially at early stages of cytostatic disease, and delayed the synthesis of specific antibodies in male CBA/CaLac mice. Platidiam (cisplatin) injected in comparable doses 4 days before immunization practically did not suppress the formation of antibody-producing cells and their functional activity, but being injected 30 days before immunization reduced the number of antibody-producing cells.