Polymorphism at position T-129C in the promoter region of ABCB1 gene in peptic ulcer patients: a case control study
Abstract Background Peptic ulcer disease is one of the most common diseases worldwide. P-glycoprotein encoded by ABCB1 gene is located on the surface of gastric tract cells. Changes in its protein function, as a consequence of polymorphism like T-129C (rs3213619), may have impact the development of some diseases. The aim of this study was to evaluate the potential role of T-129C of ABCB1 gene in peptic ulcer development. To the best of our knowledge, this is the first this kind of research in peptic ulcer diseases. Methods Patients, having attended gastroduodenoscopy because of dyspepsia symptoms and diagnosed at that time as peptic ulcer patients, were enrolled in the study. In all investigated cases, gastric mucosa specimens were taken from the antrum of the stomach. The control group consisted of healthy blood donors from local blood donation center. Overall DNA from 204 patients with peptic ulcer disease and from 94 healthy individuals was tested. The RFLP PCR technique was used for genotype analysis. Results All 204 DNA samples form investigated group and 94 DNA samples form healthy individuals were successfully analyzed. All genotypes for polymorphism in position T-129C of the ABCB1 gene in both groups were in agreement with Hardy-Weinberg equation. Statistical analysis showed no significant differences in frequency of T-129C genotypes between peptic ulcer patients and healthy individuals (p=0.3977). Also, there were no statistically significant differences in the frequency of occurrence of T-129C genotypes between patients infected and uninfected with H. pylori infection (p=0.1743). Conclusion Investigated polymorphism at position T-129C of ABCB1 gene is not associated with H. pylori infection nor with the risk of peptic ulcer disease development.