Cigarette smoke condensate-induced transformation of normal human breast epithelial cells in vitro

Satya Narayan, Aruna S. Jaiswal, Diana Kang, Pratima Srivastava, Gokul M. Das, C. Gary Gairola

Research output: Contribution to journalArticlepeer-review

62 Scopus citations


In the present study, we showed that a single-dose treatment of normal breast epithelial cell line, MCF10A, for 72 h with cigarette smoke condensate (CSC) resulted in a transformed phenotype. The anchorage-dependent growth of these cells was decreased due to increased cell cycle arrest in S-G 2/M phase; however, the surviving cells developed resistance due to an increased Bcl-xL to Bax ratio. Levels of PCNA and gadd45 proteins - involved in DNA repair in response to genomic damage - were increased, suggesting that the cells were responding to CSC-induced genomic damage. The transformation of MCF10A cells was determined by their colony-forming efficiency in soft-agar in an anchorage-independent manner. CSC-treated MCF10A cells efficiently formed colonies in soft-agar. We then re-established cell lines from the soft-agar colonies and further examined the persistence of their transforming characteristics. The reestablished cell lines, when plated after 17 passages without CSC treatment, still formed colonies in the soft-agar. An increased staining of neuropilin-1 (NRP-1) further showed a transformation characteristic of MCF10A cells treated with CSC. In summary, our results suggest that CSC is capable of transforming the MCF10A cells in vitro, supporting the role of cigarette smoking and increased risk for breast cancer.

Original languageEnglish (US)
Pages (from-to)5880-5889
Number of pages10
Issue number35
StatePublished - Aug 5 2004
Externally publishedYes


  • Anchorage-independent growth
  • Bcl-xL/Bax
  • Cigarette smoke condensate
  • Neuropilin-1
  • Normal breast epithelial cells
  • Transformation

ASJC Scopus subject areas

  • Genetics
  • Molecular Biology
  • Cancer Research


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