[Interaction between p53 and HSP70 in human hepatocellular carcinoma tissues].

AIM: To investigate the interaction between p53 and heat shock protein70 (HSP70) in human hepatocellular carcinoma tissues. METHODS: HSP70 and p53-double positive samples were screened by imunohistochemical staining from twelve human hepatocellular carcinoma tissues, and the tissue homogenate was prepared. Coimmunoprecipitation was performed by using either anti-HSP70 mAb or anti-p53 mAb. The immunoprecipitate was analysed by SDS-PAGE and Western blot. RESULTS: Immunohistochemical staining detection showed that three samples out of twelve cases were double positive for both HSP70 and p53. p53 protein existed in the immunoprecipitate of anti-HSP70 mAb, while there was HSP70 protein in the immunoprecipitate of anti-p53 mAb. CONCLUSION: HSP70 and p53 exist as a complex in human hepatocellular carcinoma tissues, which will provide a new route for studying the pathogenesis and immunotherapy of human hepatocellular carcinoma.