Glutathione S-transferase Omega 2 Genetic Polymorphism and Risk of Hepatic Failure that Lead to Liver Transplantation in Iranian Population

BACKGROUND Liver transplantation is the treatment of choice for both acute and chronic hepatic failure. GSTs family is one of the most important genes in phase II detoxification interfering with the xenobiotics and free radical metabolism. GSTO2 (N142D) is a member of this family the polymorphism of which may influence the metabolism of active components and free radicals and may contribute to hepatic failure. OBJECTIVE To investigate the association between GSTO2 genetic polymorphism and the susceptibility of hepatic failure that would lead to liver transplantation. METHODS This case-control study included 330 healthy people and 302 patients with liver transplantation as a result of hepatic failure. To determine the variants of GSTO2, we used polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method. RESULTS There was a significant association between D allele and hepatic failure, thus, people with DD genotype are more susceptible to develop heaptic failure leading to liver transplantation (OR=1.8, 95% CI: 1.10-2.95, p=0.02). We also observed that male sex increases the chance of hepatic failure (OR=2.69, 95% CI: 1.95-3.71, p=0.001). CONCLUSION D allele may reduce the detoxification ability of liver so people with mutant D allele are more prone to develop hepatic failure.