Associations of Polymorphisms in DNA Repair Genes and MDR1 Gene with Chemotherapy Response and Survival of Non-Small Cell Lung CancerReport as inadecuate




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Objectives

We aimed to determine the associations of genetic polymorphisms of excision repair cross-complementation group 1 ERCC1 rs11615, xeroderma pigmentosum group D XPD-ERCC2 rs13181, X-ray repair cross complementing group 1 XRCC1 rs25487, XRCC3 rs1799794, and breast cancer susceptibility gene 1 BRCA1 rs1799966 from the DNA repair pathway and multiple drug resistance 1 MDR1-ABCB1 rs1045642 with response to chemotherapy and survival of non-small cell lung cancer NSCLC in a Chinese population.

Materials and Methods

A total of 352 NSCLC patients were enrolled to evaluate the associations of the six SNPs with response to chemotherapy and overall survival. Logistic regressions were applied to test the associations of genetic polymorphisms with response to chemotherapy in 161 advanced NSCLC patients. Overall survival was analyzed in 161 advanced and 156 early stage NSCLC patients using the Kaplan-Meier method with log-rank test, respectively. Multivariate Cox proportional hazards model was performed to determine the factors independently associated with NSCLC prognosis.

Results

BRCA1 rs1799966 minor allele C TC+CC vs. TT, OR = 0.402, 95%CI = 0.204−0.794, p = 0.008 and MDR1-ABCB1 rs1045642 minor allele A GA +AA vs. GG, OR = 0.478, 95%CI = 0.244−0.934, p = 0.030 were associated with a better response to chemotherapy in advanced NSCLC patients. Survival analyses indicated that BRCA1 rs1799966 TC+CC genotypes were associated with a decreased risk of death HR = 0.617, 95% CI = 0.402−0.948, p = 0.028 in advanced NSCLC patients, and the association was still significant after the adjustment for covariates. Multivariate Cox regression analysis showed that ERCC1 rs11615 AA genotype P = 0.020 and smoking p = 0.037 were associated with increased risks of death in early stage NSCLC patients after surgery.

Conclusions

Polymorphisms of genes in DNA repair pathway and MDR1 could contribute to chemotherapy response and survival of patients with NSCLC.



Author: Yan Du , Tong Su , Lijun Zhao , Xiaojie Tan, Wenjun Chang, Hongwei Zhang, Guangwen Cao

Source: http://plos.srce.hr/



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