Introduction of p21(Waf1/Cip1) gene into a carcinoma cell line of the uterine cervix with inactivated p53.

In carcinomas of the uterine cervix of which p53 is frequently inactivated by papilloma viruses, gene transfer of p21, effector of p53, is an alternative tool to suppress cell growth. We introduced the p21 gene into HeLa cells. The transfectant with p21 showed a significant growth retardation by blockage of G1 to S transfer of the cell cycle. This cell line showed significantly reduced anchorage-independent growth as well as attenuated telomerase activity. These data suggest that gene transfer of p21 is an effective tool to lead carcinoma cells with inactivated p53 into less malignant phenotype.