Genetic effects and modifiers of radiotherapy and chemotherapy on survival in pancreatic cancer

Hongmei Zeng, Herbert Yu, Lingeng Lu, Dhanpat Jain, Mark S. Kidd, M. Wasif Saif, Stephen J. Chanock, Patricia Hartge, Harvey A. Risch

Research output: Contribution to journalArticlepeer-review

Abstract

Objectives: Germ-line genetic variation may affect clinical outcomes of cancer patients. We applied a candidate-gene approach to evaluate the effect of putative markers on survival of patients with pancreatic cancer. We also examined gene-radiotherapy and gene-chemotherapy interactions, aiming to explain interindividual differences in treatment outcomes. Methods: In total, 211 patients with pancreatic cancer were recruited in a population-based study. Sixty-four candidate genes associated with cancer survival or treatment response were selected from existing publications. Genotype information was obtained from a previous genome-wide association study data set. The main effects of genetic variation and gene-specific treatment interactions on overall survival were examined by proportional hazards regression models. Results: Fourteen genes showed evidence of association with pancreatic cancer survival. Among these, rs1760217, located at the DPYD gene; rs17091162 at SERPINA3; and rs2231164 at ABCG2 had the lowest P of 10, 0.0013, and 0.0023, respectively. We also observed that 2 genes, RRM1 and IQGAP2, had significant interactions with radiotherapy in association with survival, and 2 others, TYMS and MET, showed evidence of interaction with 5-fluorouracil and erlotinib, respectively. Conclusions: Our study suggested significant associations between germ-line genetic polymorphisms and overall survival in pancreatic cancer, as well as survival interactions between various genes and radiotherapy and chemotherapy.

Original languageEnglish (US)
Pages (from-to)657-663
Number of pages7
JournalPancreas
Volume40
Issue number5
DOIs
StatePublished - Jul 2011

Keywords

  • Pancreatic neoplasms
  • genetic heterogeneity
  • polymorphism
  • prognosis
  • single nucleotide
  • survival

ASJC Scopus subject areas

  • Internal Medicine
  • Endocrinology, Diabetes and Metabolism
  • Hepatology
  • Endocrinology

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