RESUMEN
Purpose:To study the effects and overexpression of p21 WAF1/CIP1 gene (p21 gene) on the SGC 7901 cell line plus cisplatin. Methods:An adenovirus expression vector with full length cDNA of p21 gene insert was constructed (ad p21) and transferred into SGC 7901 cell line with p53 mutation, the effects of ad p21 on the growth of SGC 7901 cell line was examined in vitro and in vivo . Results:The expression of p21 gene in SGC 7901 cell was confirmed by FCM, The growth of the Ad p21 gene transfected SGC 7901 cells was significantly inhibited as compared to mock (Ad LacZ) transfected SGC 7901 in vitro and induced the transfected cells appearing apoptotic, Combined with chemotherapeutic agent cisplatin (DDP), it could more strongly inhibit SGC 7901 cell growths.Conclusions:p21 gene can inhibit SGC 7901 cells growth and shows enhanced therapeutic efficiency for SGC 7901 cells when combined with DDP, especially in vivo experiment. Its use for gene therapy of cancer, especially when combined with other apoptosis inducing agents is promising.