DNA Repair Gene ERCC1 and XPD Polymorphisms Predict Glioma Susceptibility and Prognosis

Aims: We conducted a case-control study in a Chinese population to clarify the association betweenpolymorphisms in ERCC1 and XPD and susceptibility and survival of glioma.
Methods: A total of 393 cases and410 controls were selected from March 2007 to December 2011. Genotyping of ERCC1 and XPD was conductedby TaqMan assays using the ABI Prism 7911HT Sequence Detection System. All analyses were performed usingthe STATA statistical package.
Results: Polymorphisms in ERCC1 118C/T, ERCC1 8092C/A and XPD Asp312Asnshowed no statistically significant difference between glioma cases and controls. However, individuals with theXPD 751Gln/Gln genotype had an increased risk of developing glioma compared with those with the Lys/Lysgenotype (adjusted OR=1.64, 95% CI: 1.06-2.89). The ERCC1 118T/T genotype was associated with significantlyhigher median survival than the ERCC1 C/C genotype (HR=0.67, 95%CI=0.35-0.96). In addition, individualswith XPD 751Gln/Gln had a lower median survival time than XPD Lys/Lys carriers (HR=0.54, 95%CI=0.37-0.93).
Conclusion: In conclusion, we observed that the XPD 751Gln/Gln genotype is associated with gliomasusceptibility, and ERCC1 118 T/T and XPD 751Gln/Gln genotypes confer a significantly better prognosis.