Mutant p53 can induce tumorigenic conversion of human bronchial epithelial cells and reduce their responsiveness to a negative growth factor, transforming growth factor β1

B. I. Gerwin, E. Spillare, K. Forrester, T. A. Lehman, J. Kispert, J. A. Welsh, A. M.A. Pfeifer, J. F. Lechner, S. J. Baker, B. Vogelstein, C. C. Harris

Research output: Contribution to journalArticlepeer-review

Abstract

Loss of normal functions and gain of oncogenic functions when the p53 tumor suppressor gene is mutated are considered critical events in the development of the majority of human cancers. Human bronchial epithelial cells (BEAS-2B) provide an in vitro model system to study growth, differentiation, and neoplastic transformation of progenitor cells of lung carcinoma. When wild-type (WT) or mutant (MT; codon 143(Val-Ala)) human p53 cDNA was transfected into nontumorigenic BEAS-2B cells, we observed that (i) transfected WT p53 suppresses and MT p53 enhances the colony-forming efficiency of these cells, (ii) MT p53 increases resistance to transforming growth factor β1, and (iii) clones of MT p53 transfected BEAS-2B cells are tumorigenic when inoculated into athymic nude mice. These results are consistent with the hypothesis that certain mutations in p53 may function in multistage lung carcinogenesis by reducing the responsiveness of bronchial epithelial cells to negative growth factors.

Original languageEnglish (US)
Pages (from-to)2759-2763
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume89
Issue number7
DOIs
StatePublished - 1992
Externally publishedYes

Keywords

  • carcinogenesis
  • heat shock protein
  • tumor suppressor gene

ASJC Scopus subject areas

  • General

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