Use of K-Ras as a predictive biomarker for selecting anti-EGF receptor/pathway treatment

Yixing Jiang, Heath MacKley, Hua Cheng, Jaffer A. Ajani

Research output: Contribution to journalReview articlepeer-review

11 Scopus citations


Ras protein is a downstream regulator of multiple cellular receptor tyrosine kinases, mediating cell growth, transformation and maintenance of the malignant phenotype in several human cancers. Oncogenic gain-of-function mutations in ras frequently occur in colorectal cancer, non-small-cell lung cancer and pancreatic cancers. Recent clinical studies of colorectal cancer have revealed that the therapeutic efficacy of cetuximab, a chimeric monoclonal antibody against EGF receptor, depends on the presence of wild-type k-ras. Additional studies in non-small-cell lung cancer have suggested that the k-ras mutation may be a negative predictor of response to the EGF receptor tyrosine kinase inhibitors erlotinib and gefitinib. These observations have provoked an interest in utilizing K-Ras as a predictive biomarker, allowing clinicians to direct the therapy of cancer patients based on their mutational status of the k-ras gene.

Original languageEnglish (US)
Pages (from-to)535-541
Number of pages7
JournalBiomarkers in Medicine
Issue number4
StatePublished - Aug 2010

All Science Journal Classification (ASJC) codes

  • Drug Discovery
  • Clinical Biochemistry
  • Biochemistry, medical


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