Investigation of the relationship between ?2- adrenergic receptor (?2-AR) polymorphism and gastric cancer

Objective: Gastric cancer is a multifunctional disease. Emotional stress, physiological and neuroendocrine changes incancer patients can lead to the activation of the hypothalamic-pituitary-adrenal axis and the release of hormonedependent hormones such as catecholamine. In particular, it has been reported that catecholamine induction directlyaffects the biological behavior of tumor cells via ?2-Adrenergic receptor (?2-AR) mediated signaling. In this study, itwas aimed to investigate polymorphism of ?2-AR gene (rs1042717) in gastric cancer patients.Method: Polymorphism in the ?2-AR gene (rs1042717) was determined by Real-Time PCR method in 60 gastric cancerpatients and 50 healthy controls. The results were evaluated using logistic regression and Chi-square (?2) test.Results: The comparison of gastric cancer patients and controls determined a statistically significant relationship foralcoholic drink consumption (p<0,05). There was a statistically significant relationship between ?2-AR (rs1042717)polymorphism and stomach cancer (p <0.05). There was a statistically significant relationship between mutant (AA)genotype with wild type (GG) and heterozygous (AG) polymorphic genotypes when evaluated in ?2-AR polymorphismgastric cancer patients and control group (?2: 19,38, p: 0.001). Similarly, there was a statistically significant correlationbetween heterozygous (AG) with wild type (GG) and mutant (AA) polymorphic genotypes in gastric cancer (?2: 14, 27,p: 0,001).Conclusions: In this study, it was found that the AG genotype is predominant in gastric cancer patients and controls,and that the AA genotype has a protective effect against gastric cancer.