Loss of cytoplasmic CDK1 predicts poor survival in human lung cancer and confers chemotherapeutic resistance

Chunyu Zhang, Abdel G. Elkahloun, Matthew Robertson, Joell J. Gills, Junji Tsurutani, Joanna H. Shih, Junya Fukuoka, M. Christine Hollander, Curtis C. Harris, William D. Travis, Jin Jen, Phillip A. Dennis

Research output: Contribution to journalArticle

36 Scopus citations

Abstract

The dismal lethality of lung cancer is due to late stage at diagnosis and inherent therapeutic resistance. The incorporation of targeted therapies has modestly improved clinical outcomes, but the identification of new targets could further improve clinical outcomes by guiding stratification of poor-risk early stage patients and individualizing therapeutic choices. We hypothesized that a sequential, combined microarray approach would be valuable to identify and validate new targets in lung cancer. We profiled gene expression signatures during lung epithelial cell immortalization and transformation, and showed that genes involved in mitosis were progressively enhanced in carcinogenesis. 28 genes were validated by immunoblotting and 4 genes were further evaluated in non-small cell lung cancer tissue microarrays. Although CDK1 was highly expressed in tumor tissues, its loss from the cytoplasm unexpectedly predicted poor survival and conferred resistance to chemotherapy in multiple cell lines, especially microtubule-directed agents. An analysis of expression of CDK1 and CDK1-associated genes in the NCI60 cell line database confirmed the broad association of these genes with chemotherapeutic responsiveness. These results have implications for personalizing lung cancer therapy and highlight the potential of combined approaches for biomarker discovery.

Original languageEnglish (US)
Article numbere23849
JournalPloS one
Volume6
Issue number8
DOIs
StatePublished - Aug 24 2011

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

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    Zhang, C., Elkahloun, A. G., Robertson, M., Gills, J. J., Tsurutani, J., Shih, J. H., Fukuoka, J., Hollander, M. C., Harris, C. C., Travis, W. D., Jen, J., & Dennis, P. A. (2011). Loss of cytoplasmic CDK1 predicts poor survival in human lung cancer and confers chemotherapeutic resistance. PloS one, 6(8), [e23849]. https://doi.org/10.1371/journal.pone.0023849