抄録
In an attempt to obtain some information regarding heterografting of human cancer into rats, the presence and function of natural antibodies against the erythrocytes of human blood groups were studied in normal and pretreated rats from several strains. It was shown that the concentration of natural antibodies differ by rat strains, and that the natural antibody titers were comparatively lower in females than in males.
Both cortisone and X-rays act to suppress the production of natural antibodies for a certain period. The antibody formation is more storngly inhibited by X-rays than by cortisone. Cortisone acts to suppress the function of antibodies in circulating blood.
