纤维蛋白原β—455G／A,—148C／T,448G／A基因多态性与血浆纤 …

目的调查１５６名广东汉族健康人纤维蛋白原（Ｆｇ）β－４５５Ｇ／Ａ、－１４８Ｃ／Ｔ、４４８Ｇ／Ａ基因多态性频率分布、连锁不平衡关系及与血浆Ｆｇ水平的关系。方法用限制性片段长度多态性（ＲＦＬＰ）分析方法和比浊法检测血浆Ｆｇ水平。结果等位基因Ａ＾－４５５、Ｔ－１４８和Ａ＾４４８的频率分别是为０．２７６，０．２８５及０．２７２。１５６人中３个多态性位点Ｇ＾－４５５、Ｃ＾－１４８和Ｇ＾４４８或Ａ＾－４５５、

The study of beta-fibrinogen gene-455 G/A

OBJECTIVE: To analyze the frequency of beta-fibrinogen (beta-Fg) gene - 455 G/A, - 148 C/T, 448 G/A polymorphisms and their association with plasma fibrinogen levels in Han nationality in Guangdong Chinese. METHODS: The beta-Fg gene - 455 G/A, - 148 C/T, 448 G/A polymorphisms of 156 individuals were analyzed by restriction fragment length polymorphism (RFLP). Plasma fibrinogen levels were determined by turbidimetry. RESULTS: The frequencies of A(- 455), T(- 148) and A(448) allele were 0.276, 0.285 and 0.272, respectively. There were strong linkages of G(- 455), C(- 148) and G(448), and of A(- 455), T(- 148) and A(448), the correspondence was more than 97%. The plasma fibrinogen levels in the presence and absence of A(- 455) allele were (3.13 +/- 0.74) g/L and (2.89 +/- 0.57) g/L (P < 0.05); of T(- 148) allele were (3.12 +/- 0.73) g/L and (2.89 +/- 0.58) g/L (P < 0.05); and of A(448) were (3.13 +/- 0.74) g/L and (2.89 +/- 0.57) g/L (P < 0.05), respectively. The plasma fibrinogen levels of the three polymorphisms with the mutant gene are significantly higher than that in the wild type. CONCLUSION: The three polymorphisms loci are strong linkage disequilibrium. It suggests that beta-Fg gene - 455 G/A, - 148 C/T, 448 G/A polymorphisms are associated with plasma fibrinogen levels.