RESUMEN
Objective To study the mechanism of protein extracted from nidus vespae protein(NVP) on anti-leukemia and provide experimental and theoretical evidence for exploring new anti-leukemia drugs. Methods The effect of the NVP on cell growth and morphological changes of K562 cells was observed by using cell culture and transmission electronic microscopy,the effect of NVP on apoptosis-associated signal transduct protein NF-? Bp65,?-catenin and iNOS of K562 cells was detected via immunohistochemical method and image analysis system. Results(1) The saturation destinity of K562 cells in NVP group was decreased which suggested that the proliferation was inhibited.(2) In the NVP group typical apoptosis morphological changes were observed in the K562 cells under transmission electronic microscope.(3) The result of immunohistochemistry showed that the expression of NF-? Bp65,?-catenin and iNOS of K562 cells in the NVP group decreased.The optical density(A) values of NF-?Bp65,?-catenin analysed by the image analysis system were decreased in the NVP group.Conclusion The NVP can inhibit the proliferation of K562 cell prominently,and the mechanism probably is that the apoptosis is induced via regulating the expression of apoptosis-associated signal transducted factors NF-?Bp65,?-catenin and iNOS.