Purpose: To investigate the association of tumor necrosis factor-related apoptosis inducing ligand (TRAIL) gene polymorphisms with gastric cancer in Chinese Han population in central China.
Methods: A total of 304 patients with gastric cancer confirmed by histopathology and 421 unrelated healthy controls were studied. Gene polymorphisms of TRAIL (G1525A and C1595T) were genotyped by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis.
Results: The frequency of the genotype carriers of TRAIL 1525A (GA + AA) and 1595T (CT + TT) was significantly lower in gastric cancer than in healthy controls (37.2% vs. 61.5%, P < 0.001, OR = 0.581, 95% CI 0.442 ~ 0.764; 36.2% vs. 62.0%, P < 0.001, OR = 0.570, 95% CI 0.433 ~ 0.750, respectively). Stratification analysis showed that both TRAIL 1525A (GA + AA) and 1595T (CT + TT) carriers were associated with poorly-differentiated gastric cancer compared to 1525GG genotype and 1595CC genotype (OR = 0.516, 95%CI 0.279 ~ 0.957, P = 0.026; OR = 0.395, 95%CI 0.207 ~ 0.753, P = 0.004, respectively).
Conclusions: TRAIL G1525A and C1595T gene polymorphisms were significantly correlated with the susceptibility to gastric cancer in Chinese Han population in central China.