Genetic variants in DNA repair genes as potential predictive markers for oxaliplatin chemotherapy in colorectal cancer

The Pharmacogenomics Journal
Elisabeth J KapJenny Chang-Claude

Abstract

Oxaliplatin-based chemotherapy exerts its effects through generating DNA damage. Hence, genetic variants in DNA repair pathways could modulate treatment response. We used a prospective cohort of 623 colorectal cancer patients with stage II-IV disease treated with adjuvant/palliative chemotherapy to comprehensively investigate 1727 genetic variants in the DNA repair pathways as potential predictive markers for oxaliplatin treatment. Single nucleotide polymorphisms (SNP) associations with overall survival and recurrence-free survival were assessed using a Cox regression model. Pathway analysis was performed using the gamma method. Patients carrying variant alleles of rs3783819 (MNAT1) and rs1043953 (XPC) experienced a longer overall survival after treatment with oxaliplatin than patients who did not carry the variant allele, while the opposite association was found in patients who were not treated with oxaliplatin (false discovery rate-adjusted P-values for heterogeneity 0.0047 and 0.0237, respectively). The nucleotide excision repair (NER) pathway was found to be most likely associated with overall survival in patients who received oxaliplatin (P-value=0.002). Our data show that genetic variants in the NER pathway are potentiall...Continue Reading

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Citations

Jan 7, 2016·Tumour Biology : the Journal of the International Society for Oncodevelopmental Biology and Medicine·Lin JiaoXiao-Feng Zhu
Feb 3, 2016·International Journal of Cancer. Journal International Du Cancer·Elisabeth J KapJenny Chang-Claude
Nov 20, 2020·The Oncologist·Marijo BilusicElizabeth Plimack

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