p53 mutations in colorectal cancer.

• N R Rodrigues

  Director's Laboratory, Imperial Cancer Research Fund, Lincolns Inn Fields, London, United Kingdom.

• A Rowan

  Director's Laboratory, Imperial Cancer Research Fund, Lincolns Inn Fields, London, United Kingdom.

• M E Smith

  Director's Laboratory, Imperial Cancer Research Fund, Lincolns Inn Fields, London, United Kingdom.

• I B Kerr

  Director's Laboratory, Imperial Cancer Research Fund, Lincolns Inn Fields, London, United Kingdom.

• W F Bodmer

  Director's Laboratory, Imperial Cancer Research Fund, Lincolns Inn Fields, London, United Kingdom.

• J V Gannon

  Director's Laboratory, Imperial Cancer Research Fund, Lincolns Inn Fields, London, United Kingdom.

• D P Lane

  Director's Laboratory, Imperial Cancer Research Fund, Lincolns Inn Fields, London, United Kingdom.

抄録

Immunohistological staining of primary colorectal carcinomas with antibodies specific to p53 demonstrated gross overexpression of the protein in approximately 50% of the malignant tumors examined. Benign adenomas were all negative for p53 overexpression. To determine the molecular basis for this overexpression we examined p53 protein expression in 10 colorectal cancer cell lines. Six of the cell lines expressed high levels of p53 in ELISA, cell-staining, and immunoprecipitation studies. Direct sequencing and chemical-mismatch-cleavage analysis of p53 cDNA by using the polymerase chain reaction in these cell lines showed that all cell lines that expressed high levels of p53 were synthesizing mRNAs that encoded mutant p53 proteins. In two of those four cell lines where p53 expression was lower, point mutations were still detected. Thus, we conclude that overexpression of p53 is synonymous with mutation, but some mutations would not be detected by a simple immunohistochemical analysis. Mutation of the p53 gene is one of the commonest genetic changes in the development of human colorectal cancer.

収録刊行物

• Proceedings of the National Academy of Sciences

  Proceedings of the National Academy of Sciences 87 (19), 7555-7559, 1990-10

  Proceedings of the National Academy of Sciences

キーワード

• Multidisciplinary

詳細情報

• CRID: 1361981468636510080
• NII論文ID: 30016287845
• DOI: 10.1073/pnas.87.19.7555
• ISSN: 10916490
• ISSN: 00278424
• Web Site: https://pnas.org/doi/pdf/10.1073/pnas.87.19.7555
• データソース種別:
  • Crossref
  • CiNii Articles