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Participation of p53 protein in the cellular response to DNA damage.

Publication ,  Journal Article
Kastan, MB; Onyekwere, O; Sidransky, D; Vogelstein, B; Craig, RW
Published in: Cancer Res
December 1, 1991

The inhibition of replicative DNA synthesis that follows DNA damage may be critical for avoiding genetic lesions that could contribute to cellular transformation. Exposure of ML-1 myeloblastic leukemia cells to nonlethal doses of the DNA damaging agents, gamma-irradiation or actinomycin D, causes a transient inhibition of replicative DNA synthesis via both G1 and G2 arrests. Levels of p53 protein in ML-1 cells and in proliferating normal bone marrow myeloid progenitor cells increase and decrease in temporal association with the G1 arrest. In contrast, the S-phase arrest of ML-1 cells caused by exposure to the anti-metabolite, cytosine arabinoside, which does not directly damage DNA, is not associated with a significant change in p53 protein levels. Caffeine treatment blocks both the G1 arrest and the induction of p53 protein after gamma-irradiation, thus suggesting that blocking the induction of p53 protein may contribute to the previously observed effects of caffeine on cell cycle changes after DNA damage. Unlike ML-1 cells and normal bone marrow myeloid progenitor cells, hematopoietic cells that either lack p53 gene expression or overexpress a mutant form of the p53 gene do not exhibit a G1 arrest after gamma-irradiation; however, the G2 arrest is unaffected by the status of the p53 gene. These results suggest a role for the wild-type p53 protein in the inhibition of DNA synthesis that follows DNA damage and thus suggest a new mechanism for how the loss of wild-type p53 might contribute to tumorigenesis.

Duke Scholars

Published In

Cancer Res

ISSN

0008-5472

Publication Date

December 1, 1991

Volume

51

Issue

23 Pt 1

Start / End Page

6304 / 6311

Location

United States

Related Subject Headings

  • Tumor Suppressor Protein p53
  • Tumor Cells, Cultured
  • Time Factors
  • Oncology & Carcinogenesis
  • Mutation
  • Humans
  • Genes, p53
  • Flow Cytometry
  • Exons
  • Dactinomycin
 

Citation

APA
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ICMJE
MLA
NLM
Kastan, M. B., Onyekwere, O., Sidransky, D., Vogelstein, B., & Craig, R. W. (1991). Participation of p53 protein in the cellular response to DNA damage. Cancer Res, 51(23 Pt 1), 6304–6311.
Kastan, M. B., O. Onyekwere, D. Sidransky, B. Vogelstein, and R. W. Craig. “Participation of p53 protein in the cellular response to DNA damage.Cancer Res 51, no. 23 Pt 1 (December 1, 1991): 6304–11.
Kastan MB, Onyekwere O, Sidransky D, Vogelstein B, Craig RW. Participation of p53 protein in the cellular response to DNA damage. Cancer Res. 1991 Dec 1;51(23 Pt 1):6304–11.
Kastan, M. B., et al. “Participation of p53 protein in the cellular response to DNA damage.Cancer Res, vol. 51, no. 23 Pt 1, Dec. 1991, pp. 6304–11.
Kastan MB, Onyekwere O, Sidransky D, Vogelstein B, Craig RW. Participation of p53 protein in the cellular response to DNA damage. Cancer Res. 1991 Dec 1;51(23 Pt 1):6304–6311.

Published In

Cancer Res

ISSN

0008-5472

Publication Date

December 1, 1991

Volume

51

Issue

23 Pt 1

Start / End Page

6304 / 6311

Location

United States

Related Subject Headings

  • Tumor Suppressor Protein p53
  • Tumor Cells, Cultured
  • Time Factors
  • Oncology & Carcinogenesis
  • Mutation
  • Humans
  • Genes, p53
  • Flow Cytometry
  • Exons
  • Dactinomycin