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Induction of cdk2 after gamma-ray irradiation is dependent on p53 status
H Matsumoto1, X Wang, A Takahashi
1NARA MED UNIV,DEPT BIOL,KASHIHARA,NARA 634,JAPAN.
Abstract:
We show that expression of cdk2 induced after gamma-ray irradiation is dependent on the p53 status in two human glioblastoma cell lines, one bearing the wild-type p53 gene and the other the mutant gene. This result indicates that wtp53 induces the expression of not only WAF1 but also cdk2. Our results suggest that p53-dependent WAF1 induction would act to prevent gene amplification and mutation in cells which sustain DNA damage in G(1) phase and p53-dependent cdk2 induction might act to prevent aneuploidy through E2F-1-DP-1 inactivation in cells which sustain DNA damage in G(2) phase.
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