Association of fibrinogen Bβ-chain gene polymorphism with factors affecting obesity

Objective To study the association of fibrinogen(Fg) Bβ-854G/A, -455G/A, -249C/T, -148C/T;448G/A and Bcl-1G/A gene polymorphisms with factors affecting obesity, and the fibrinogen function such as plasma fibrinogen concentration and molecular reactivity. Methods One thousand and three hundred ninety-one subjects from Kailuan corporation were enrolled by medical examination and questionnaire survey, and were divided into normal weight, overweight and obese groups based on body mass index (BMI). Blood biochemistry, fibrinogen concentration, fibrin monomer polymerized velocity (FMPV), and FMPV/Amax were measured. The gene polymorphisms of the six loci were detected by polymerase chain reaction-restriction fragment length polymorphism. Results The frequencies of Bcl-1A and its mutated genotype in the overweight group were significantly higher than that in the normal weight group (P＜0.01). In all the three groups, Fg concentration, FMPV, FMPV/Amax in individuals with Bβ-854 mutated genotype were significantly higher than those with wild type genotype (P＜0.01), and in the overweight group, FMPV/Amax in those with Bβ-455 mutated genotype, FMPV in those with Bβ-249 mutated genotype, were higher than those with wild type genotype (P＜0.05).Conclusion Individuals with Bcl-1A and its mutated genotype are susceptible to overweight. The Bβ -455and -249 mutated genotypes are accumulative genes for overweight by regulating the Fg function.