Integrative analysis of proteomic signatures, mutations, and drug responsiveness in the NCI 60 cancer cell line set

Eun Sung Park, Rosalia Rabinovsky, Mark Carey, Bryan T. Hennessy, Roshan Agarwal, Wenbin Liu, Zhenlin Ju, Wanleng Deng, Yiling Lu, Hyun Goo Woo, Sang Bae Kim, Jae Ho Cheong, Levi A. Garraway, John N. Weinstein, Gordon B. Mills, Ju Seog Lee, Michael A. Davies

Research output: Contribution to journalArticlepeer-review

77 Scopus citations


Aberrations in oncogenes and tumor suppressors frequently affect the activity of critical signal transduction pathways. To analyze systematically the relationship between the activation status of protein networks and other characteristics of cancer cells, we did reverse phase protein array (RPPA) profiling of the NCI60 cell lines for total protein expression and activation-specific markers of critical signaling pathways. To extend the scope of the study, we merged those data with previously published RPPA results for the NCI60. Integrative analysis of the expanded RPPA data set revealed five major clusters of cell lines and five principal proteomic signatures. Comparison of mutations in the NCI60 cell lines with patterns of protein expression showed significant associations for PTEN, PIK3CA, BRAF, and APC mutations with proteomic clusters. PIK3CA and PTEN mutation enrichment were not cell lineage-specific but were associated with dominant yet distinct groups of proteins. The five RPPA-defined clusters were strongly associated with sensitivity to standard anticancer agents. RPPA analysis identified 27 protein features significantly associated with sensitivity to paclitaxel. The functional status of those proteins was interrogated in a paclitaxel whole genome small interfering RNA (siRNA) library synthetic lethality screen and confirmed the predicted associations with drug sensitivity. These studies expand our understanding of the activation status of protein networks in the NCI60 cancer cell lines, demonstrate the importance of the direct study of protein expression and activation, and provide a basis for further studies integrating the information with other molecular and pharmacological characteristics of cancer.

Original languageEnglish (US)
Pages (from-to)257-267
Number of pages11
JournalMolecular cancer therapeutics
Issue number2
StatePublished - Feb 2010
Externally publishedYes

ASJC Scopus subject areas

  • Oncology
  • Cancer Research


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