Genetic polymorphisms in the FVII gene is associated with lower extremity deep venous thrombosis: A case-control study.

This study aims to explore the associations between FVII gene polymorphisms (R353Q, 5'F7, and -402G/A) and lower extremity deep venous thrombosis (LEDVT) in a Chinese Han population. LEDVT patients (153) and healthy people (174) were, respectively, as case and control groups and evaluated related biochemical indicators. Gene polymorphisms of R353Q, 5'F7, and -402G/A of FVII, serum FVII level, antithrombin activity, plasma fibrinogen content, and plasma D-dimer (D-D) level were determined by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP), ELISA, chromogenic substrate assay, coagulating assay, and Immunoturbidimetry assay, respectively. Compared with the control group, the case group had a higher level of body mass index (BMI), glucose, and fibrinogen, and lower level of total cholesterol (TC). Notable differences were found in GG genotype, G and A alleles, as well as distribution of recessive model of -402G/A. The serum FVII level of GG genotype was higher than that of GA and AA genotypes. FIB and D-D had a higher level had a lower level in GG genotype when compared with GA and AA genotypes. Smoking, drinking, serum FVII level, and -402G/A-GG were the independent risk factors for LEDVT. This study demonstrates that -402G/A of FVII may be a risk factor for LEDVT patients in a Chinese Han population.