Effects of Periplaneta americana extract Ento-A on immune function in immunosuppressed mice / 中国药理学通报

Aim To investigate the effects of Periplane-ta americana extract Ento-A on the immune function in immunosuppressed mice . Methods Immunosup-pressed mouse model was induced by intraperitoneal injection of cyclophosphamide in KM mice .To evalu-ate the effects of Ento-A on the immune function in im-munosuppressed mice , neutral red method and MTT assay were used respectively to detect the effects of En-to-A on the phagocytosis of peritoneal macrophages and T cell proliferation rate in mice; with sheep red blood cell as immunogen , the effects of Ento-A on the pro-duction of serum hemolysin were evaluated;peripheral blood was tested and immune organ index calculated . Results Compared with model control group , the high, medium and low doses of Ento-A could improve the expression of serum hemolysin in immunosup-pressed mice ( P<0.01 ) , and increase the spleen in-dex(P<0.01) and thymus index (P>0.05), signifi-cantly increased the content of WBC ( P<0.01 ) , PLT ( P<0.01 ) , HGB ( P<0.01 ) , while the contents of RBC was on the rise , with no significant difference ( P>0.05 ) in peripheral blood , significantly enhanced phagocytic function and T lymphocyte proliferative abil-ity in a dose-dependent manner ( P<0.01 ) .Conclu-sion Ento-A can enhance the immune function of im-munosuppressed mice .

STUDIES ON ANTITUMOR AND IMMUNOSUPPRESSION EFFECTS OF SODIUMPYRIDINETHIONE / 中国药理学通报

Sodium pyridinethione, in vitro, possesses a significant inhibitory effect on human tumor cell strains, such as Hela, CNE-2 and Raji cell strain. In vivo, it has not inhibitory effect on the transplanted tumors, such as S180, LLC and EC, but significantly enhance the inhibitory effects of 5-Fu on S180.Sodium pyridinethione markedly decreases the weight of spleen and thymus, and serum hemolysins reaction induced by SRBC in mice and skin delayed type hypersensitivity reaction induced by DNCB in guinea pigs It also inhibits lyphocyte transformation induced by PHA. All these effects are shown clear dose-response relationship. Our experiments showed that sodium pyridinethion is a new antitumor and immuno-inhibitory compound.