Prognostic Significance of GSTP1, XRCC1 and XRCC3 Polymorphisms in Non-small Cell Lung Cancer Patients

Aim: Individual differences in chemosensitivity and clinical outcome in non-small cell lung cancer (NSCLC)patients treatment with platinum-based chemotherapy may be due to genetic factors. Our study aimed toinvestigate the prognostic role of GSTP1, XRCC1 and XRCC3 in NSCLC patients treated with chemotherapy.
Methods: A total of 460 cases were consecutively selected from The Affiliated Hospital of Nantong Universitybetween Jan. 2003 to Nov. 2006, and all were followed-up until Nov. 2011. Genotyping of GSTP1 Ile105Val, XRCC1Arg194Trp, XRCC1 Arg399Gln and XRCC3 Thr241Met was conducted by duplex polymerase-chain-reactionwith confronting-two-pair primer methods.
Results: Patients with GSTP Val/Val exhibited a shorter survivaltime, and had a 1.89 fold greater risk of death than did those with the IIe/IIe genotype. For XRCC1 Arg194Trp,the variant genotype Trp/Trp was significantly associated with a decreased risk of death from NSCLC whencompared with the Arg/Arg. Individuals carrying XRCC1 399Gln/Gln genotype had a longer survival time,with a lowered risk of death from NSCLC.
Conclusion: This study indicated that GSTP1 Ile105Val, XRCC1Arg194Trp and XRCC1Arg399Gln genes have a role in modifying the effect of platinum-based chemotherapyfor NSCLC patients in a Chinese population. Our findings provide information for therapeutic decisions forindividualized therapy in NSCLC cases.