Plasminogen Activator Inhibitor-1 4G/5G Promoter Polymorphism in Adults with Splanchnic Vein Thrombosis: A Case-Control Study.

The role of PAI-1 4G/5G polymorphism in venous thrombosis is unclear. PAI-1 4G/4G genotype is associated with elevated levels of PAI-1 resulting in a hypofibrinolytic state and hence increased thrombotic risk. In this study, we assessed the role of PAI-1 4G/5G promoter polymorphism in adult patients with splanchnic vein thrombosis. A total of 40 cases (portal vein thrombosis and Budd-Chiari syndrome) and 40 healthy controls were evaluated for the PAI-1 4G/5G polymorphism by amplification refractory mutation system polymerase chain reaction along with thrombophilia workup. The frequency of PAI-1 4G/4G homozygous, 4G/5G heterozygous and 5G/5G homozygous genotypes were 17.5%, 42.5% and 40%, respectively among cases and 22.5%, 50% and 27.5%, respectively among controls and the difference was not statistically significant (p = 0.61). The  PAI-1 4G/4G genotype was significantly associated with the cases with deranged thrombophilic risk factor (both inherited and acquired) (p = 0.02). SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s12288-021-01454-5. © Indian Society of Hematology and Blood Transfusion 2021.