The effects of the genetic polymorphisms of antioxidant enzymes on susceptibility to papillary thyroid carcinoma

AbstractSeveral lines of evidences have indicated that inflammation play an important role in the carcinogenesis. During the inflammatory processes, free radical species are produced from oxidative stress. In normal conditions, enzymatic and nonenzymatic antioxidants remove these products. Manganese superoxide dismutase (MnSOD), glutathione peroxidase ‐1 (GPx ‐1), and catalase (CAT) are three important enzymes. Therefore, this study aimed to evaluate the effects ofMnSOD (SOD2),GPX ‐1, andCAT genetic polymorphisms on papillary thyroid carcinoma (PTC) susceptibility. A total of 134 patients with PTC and 151 healthy controls were recruited to participate in this study. All samples were genotyped forSOD2 rs4880,GPX1 1050450, andCAT rs7943316 polymorphisms by polymerase chain reaction ‐restriction fragment length polymorphism method. The frequencies of thers1050450,rs4880, andrs7943316 alleles and genotypes were not different between PTC patients and controls. However, the TC genotype ofSOD2 rs4880 polymorphism was significantly higher in males compared to that in females in PTC patients (odds ratio [OR], 3.9 [95% CI, 1.5 –11],p =  .007). The rs4880 polymorphism was also associated with higher stages (III‐IV) of PTC in dominant model. No significant correlation was found betweenGPX1 ‐rs1050450 andCAT ‐rs7943316 polymorphisms and demographic, clinical, and pathological features of the disease. TheSOD2 rs4880CT genotype was more frequent in males with PTC and patie...
Source: IUBMB Life - Category: Research Authors: Tags: RESEARCH COMMUNICATION Source Type: research