Role of 14-3-3 sigma in resistance to cisplatin in non-small cell lung cancer cells

Cetintas V. B. , TETİK A. , ÇOK G. , Kucukaslan A. S. , KOSOVA B. , GÜNDÜZ C. , ...More

CELL BIOLOGY INTERNATIONAL, vol.37, no.1, pp.78-86, 2013 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 37 Issue: 1
  • Publication Date: 2013
  • Doi Number: 10.1002/cbin.10006
  • Page Numbers: pp.78-86


The efficacies of chemotherapeutic agents are often limited by side effects and acquired drug resistance. We have investigated whether the differential expression pattern of 14-3-3 sigma affects cisplatin response in non-small cell lung cancer cell lines. Two pairs of parental/cisplatin resistant cell lines (A549/CRA549 and Calu1/CR-Calu1) and clinical lung cancer biopsy samples were analysed for 14-3-3 sigma expression. Cell viability was assessed by WST assay; and 14-3-3 sigma expression was suppressed by siRNA transfection. 14-3-3 sigma mRNA expression increased in CR-A549 and CR-Calu1 compared with their cisplatin-sensitive parental A549 and Calu1 cell lines. But when 14-3-3 sigma expression was suppressed, elevated cisplatin response was seen in A549 and CR-Calu1 cell lines. Increased 14-3-3 sigma expression might also account for reduced cisplatin response in vivo, since, 14-3-3 sigma expression in clinical biopsy samples obtained from lung cancer patients undergoing cisplatin-based chemotherapy significantly higher in the non-responder compared with the responder group. We therefore propose that increased 14-3-3 sigma expression is correlated with cisplatin response in non-small cell lung cancer cells; monitoring its expression might become useful in the future in predicting poor outcome to cisplatin treatment and/or the verification of acquired cisplatin resistance in lung cancer patients.