Associations of BNIP3 and DAPK1 gene polymorphisms with disease susceptibility, clinicopathologic features, anxiety, and depression in gastric cancer patients.The purpose of this study is to explore the associations of BNIP3 and DAPK1 polymorphisms with disease susceptibility, clinicopathologic characteristics, depression, and anxiety in gastric cancer (GC) patients.  In this study, 150 GC patients and 100 healthy controls were recruited.  1000 Genomes database and Haploview 4.0 software were used to select tag SNPs.  Improved multiplex ligase detection reaction was used for genotyping.  Data were analyzed using Chi-square test (χ2 test) and univariate and multivariate logistic regression.  The results demonstrated that the rs10781582 of BNIP3 in the dominant model was associated with a reduced risk of GC in the younger group (P BH = 0.015), and the minor allele G of rs1329600 at DAPK1 was associated with reduced risk of GC (P BH = 0.018).  In the stratified analysis, the rs3793742 and rs10781582 of BNIP3 in the dominant model were associated with gender and age of GC patients, respectively (rs3793742: P BH = 0.033; rs10781582: P BH = 0.030).  The rs10781582 of BNIP3 in the dominant model was correlated with depression in GC patients (P BH = 0.003).  However, no association was found between BNIP3 and DAPK1 polymorphisms and differentiation degree, TNM stage, lymph node metastases, visceral metastasis, and anxiety.  In summary, polymorphisms of BNIP3 and DAPK1 were associated with a protective effect against GC.  So far, this is the first study to explore the association between BNIP3 and DAPK1 gene polymorphism and GC risk, which may provide new insight about biologic mechanisms of GC pathogenesis.
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