蛋氨酸合成酶及胱硫醚β合成酶基因多态性与冠状动脉粥样硬化发生的关系  被引量:1

Relationship of Atherosclerosis to Gene Polymorphism of Methionine Synthase and Cystathionine Beta-Synthase

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作  者:李秀昌[1] 胡燕燕[2] 黄海南[3] 李素梅[1] 

机构地区:[1]泰山医学院附属医院心内科,山东省泰安市271000 [2]山东大学齐鲁医院心内科 [3]山东省医学科学院

出  处:《中国循环杂志》2007年第4期275-277,共3页Chinese Circulation Journal

摘  要:目的:探讨蛋氨酸合成酶(MS)和胱硫醚B合成酶(CBS)的基因多态性对同型半胱氨酸代谢的影响及与动脉粥样硬化的关系。方法:共人选研究对象153例(对照组40例,冠心病组113例)。采用高效液相色谱法测定血清同型半胱氨酸浓度。采用聚合酶链式反应扩增及限制性内切酶技术检测CBS基因1011A→G突变型和MS基因D919G突变型。结果:在40例对照组中,MS基因纯合子突变型(GG)为0,杂合子突变型(AG)占7.5%(3/40),总突变率占7.5%;在113例冠心病组中,纯合子突变型(GG)占2.7%(3/113),杂合子突变型(AG)占21.2%(24/113),总突变率为23.9%。χ^2检验表明,突变型和非突变型在两组间有显著性差异(χ^2=5.16,P〈0.025)。G等位基因对冠心病的比值比(OR值)为4.39(95%的可信限为1.31~14.73,P〈0.05)。突变部分血清同型半胱氨酸水平显著高于非突变部分[(16.83±3.08)mmol/L vs(9.86±3.18)mmol/L]。CBS基因仅扩增出等位基因A,没有扩增出突变型G等位基因。结论:MS基因D919G突变型可导致血清同型半胱氨酸水平升高,并促进动脉粥样硬化的发生。Objective : To investigate the influence of gene polymorphism of methionine synthase ( MS ) and cystathionine beta-synthase (CBS)on serum homocysteine and atherosclerosis. Methods: The study population consisted of 153 subjects ( 113 patients,40 controls). Serum homocysteine concentration was measured using high performance liquid chromatography(HPLC). The frequencies and distributions of MS gene D919G mutation and CBS gene 1011A→G mutation were detected by PCR genotyping. Results : The incidence of the homozygous transition(GG) and heterozygous transition (AA) of MS were 2. 7% and 21.2% in the patients,which were significantly higher than those in the controls (0% and 7. 5 %, respectively ,X^2 = 5.16, P 〈 0. 025 ). The calculated odds ratio for G allele was 4. 39 (95% CI 1.31-14. 73, P 〈 0. 05 ). The serum homocysteine concentration in mutation group was significantly higher than that in non-mutation group. Conclusion :The MS gene D919G mutation can elevate the serum homocysteine level,which is an independent risk factor of atheosclerosis.

关 键 词:同型半胱氨酸 蛋氨酸合成酶 胱硫醚Β合成酶 动脉粥样硬化 

分 类 号:R541.4[医药卫生—心血管疾病]

 

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