Pancreatic cancer is a fatal malignancy with an increasing incidence in Shanghai, China. A genome-wide association study (GWAS) and other work have shown that ABO alleles are associated with pancreatic cancer risk. We conducted a population-based case-control study involving 256 patients with pathologically confirmed pancreatic ductal adenocarcinoma (PDAC) and 548 healthy controls in Shanghai, China, to assess the relationships between GWAS-identified ABO alleles and risk of PDAC. Carriers of the C allele of rs505922 had an increased cancer risk [adjusted odds ratio (OR) = 1.42, 95% confidence interval (CI): 1.02-1.98] compared to TT carriers. The T alleles of rs495828 and rs657152 were also significantly associated with an elevated cancer risk (adjusted OR = 1.58, 95% CI: 1.17-2.14; adjusted OR = 1.51, 95% CI: 1.09-2.10). The rs630014 variant was not associated with risk. We did not find any significant gene-environment interaction with cancer risk using a multifactor dimensionality reduction (MDR) method. Haplotype analysis also showed that the haplotype CTTC was associated with an increased risk of PDAC (adjusted OR = 1.46, 95% CI: 1.12-1.91) compared with haplotype TGGT. GWAS-identified ABO variants are thus also associated with risk of PDAC in the Chinese population.
[1]Shanghai Jiao Tong Univ, Renji Hosp, Shanghai Canc Inst, Dept Epidemiol,Sch Med, Shanghai 200032, Peoples R China.
[2]Univ Hawaii, Ctr Canc, Program Epidemiol, Honolulu, HI 96813 USA.
[3]Fudan Univ, Hua Shan Hosp, Dept Surg, Shanghai 200031, Peoples R China.
[4]Yale Univ, Dept Epidemiol & Publ Hlth, Sch Publ Hlth, New Haven, CT 06510 USA.
[5]Yale Canc Ctr, New Haven, CT 06510 USA.
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