X-RAY REPAIR CROSS-COMPLEMENTING GROUP 1 （XRCC1） Arg 399 Gin POLYMORPHISM AND AFLATOXIN B1 （AFB1）-RELATED HEPATOCELLULAR CARCINOMA （HCC） IN GUANGXI POPULATION

In Guangxi Zhuang Autonomous Region,Hepatocellular carcinoma(HCC)is one of the maincancer killers,the incidence rate of which is5～40/1,000,000per year.Clinic-epidemiological evidencesuggests AFB1exposure is the most cause[1].However,the exact mechanisms of AFB1hepatocarcinogenesishave not been fully elucidated.Recently,there is agrowing realization that genetic constitution is ofimportance in determining individual’s susceptibility toHCC.This genetic susceptibility may result frominhe…

X-ray repair cross-complementing group 1 (XRCC1) Arg 399 Gln polymorphism and aflatoxin B1 (AFB1)-related hepatocellular carcinoma (HCC) in Guangxi population

Objective: To explore the relationship of XRCC1 Arg 399 Gln polymorphism and AFB1-related hepatocellular carcinoma (HCC) risk in Guangxi population. Methods: The DNA samples from peripheral blood white blood cells were obtained from subjects including 140 HCC and 536 controls. The XRCC1 gene 399 codon polymorphism was detected by PCR-RFLP technique. Results: The frequency of XRCC1 399 Arg/Gln & Gln/Gln genotype in HCC patients (48.57%) was significantly higher that in normal controls (32.46%), and XRCC1 399 Arg/Gln & Gln/Gln genotype was associated with increased risk of HCC (adjusted odds ratios (OR)=2.18, 95% confidence interval (CI) 1.27∼3.74). In addition, in the cohort of low/median level of AFB1 exposure, the codon 399 Gln allele was associated with a conspicuous significantly increasing risk for HCC (adjusted OR=2.06, 95% CI=1.01∼4.20). Conclusion: The results indicate that the XRCC1 399 Gln allele is a potentially important determinant of susceptibility to AFB1-related HCC. Foundation item: This work was supported by the National Natural Science Foundation of China (No. 39860032). Biography: LONG Xi-dai (1973–), male, master of medicine, Guangxi Medical University, majors in tumor pathology.