PTTG1 Levels Are Predictive of Saracatinib Sensitivity in Ovarian Cancer Cell Lines

I. Nakachi, B. A. Helfrich, M. A. Spillman, E. A. Mickler, C. J. Olson, J. L. Rice, C. D. Coldren, L. E. Heasley, M. W. Geraci, R. S. Stearman

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Src kinase is recognized as a key target for molecular cancer therapy. However, methods to efficiently select patients responsive to Src inhibitors are lacking. We explored the sensitivity of ovarian cancer cell lines to the Src kinase inhibitor saracatinib to identify predictive markers of drug sensitivity using gene microarrays. Pituitary tumor transforming gene 1 (PTTG1) was selected as a potential biomarker as mRNA levels were correlated with saracatinib resistance, as well as higher PTTG1 protein expression. PTTG1 expression was correlated with proliferation, cell division, and mitosis in ovarian cancer tissues data sets. In sensitive cell lines, saracatinib treatment decreased PTTG1 and fibroblast growth factor 2 (FGF2) protein levels. Downregulating PTTG1 by siRNAs increased saracatinib sensitivity in two resistant cell lines. Our results indicate PTTG1 may be a valuable biomarker in ovarian cancer to predict sensitivity to saracatinib, and could form the basis of a targeted prospective saracatinib trial for ovarian cancer.

Original languageEnglish (US)
Pages (from-to)293-301
Number of pages9
JournalClinical and translational science
Volume9
Issue number6
DOIs
StatePublished - Dec 1 2016
Externally publishedYes

ASJC Scopus subject areas

  • Neuroscience(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Pharmacology, Toxicology and Pharmaceutics(all)

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    Nakachi, I., Helfrich, B. A., Spillman, M. A., Mickler, E. A., Olson, C. J., Rice, J. L., Coldren, C. D., Heasley, L. E., Geraci, M. W., & Stearman, R. S. (2016). PTTG1 Levels Are Predictive of Saracatinib Sensitivity in Ovarian Cancer Cell Lines. Clinical and translational science, 9(6), 293-301. https://doi.org/10.1111/cts.12413