Bcl-2 expression correlates with apoptosis induction but not loss of clonogenic survival in small cell lung cancer cell lines treated with etoposide

Christel Breton, Michael D. Story, Raymond E. Meyn

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

The influence of bcl-2 oncogene expression on etoposide-induced apoptosis and clonogenic survival was investigated in five small cell lung cancer (SCLC) cell lines, three of which were bcl-2-expressing and two of which were non-bcl-2-expressing. The bcl-2-expressing lines displayed a lower apoptosis propensity than the non-bcl-2-expressing lines. When bcl-2-expressing cells were incubated in cystine/methionine-free (CMF) medium, etoposide-induced apoptosis was restored to levels comparable to those seen in non-bcl-2-expressing lines. However, the endpoint of clonogenic survival after drug treatment did not display any consistent pattern that correlated with bcl-2 status. In addition, treatment of the two bcl-2-expressing cell lines with etoposide in CMF medium did not modify their clonogenic survival curves compared to treatment in regular medium. These results are consistent with the idea that bcl-2 expression modulates etoposide-induced apoptosis but not clonogenic survival.

Original languageEnglish (US)
Pages (from-to)751-757
Number of pages7
JournalAnti-Cancer Drugs
Volume9
Issue number9
DOIs
StatePublished - 1998

Keywords

  • Apoptosis
  • Bcl-2
  • Etoposide
  • Small cell lung cancer
  • Thiols

ASJC Scopus subject areas

  • Oncology
  • Pharmacology
  • Pharmacology (medical)
  • Cancer Research

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