外体序列测定识别了罕见的LDLR和APOA5等位基因,从而增加了心肌梗塞的风险
Ron Do1, Nathan O Stitziel2, Hong-Hee Won1
11] Center for Human Genetic Research, Massachusetts General Hospital, Boston, Massachusetts 02114, USA. [2] Cardiovascular Research Center, Massachusetts General Hospital, Boston, Massachusetts 02114, USA. [3] Department of Medicine, Harvard Medical School, Boston, Massachusetts 02114, USA. [4] Program in Medical and Population Genetics, Broad Institute, 7 Cambridge Center, Cambridge, Massachusetts 02142, USA.
Nature
|December 10, 2014
概括
在LDLR和APOA5基因的罕见突变显著增加早期发作的心肌梗塞 (MI) 的风险. 识别这些遗传因素对于理解和预防心脏病至关重要.
科学领域:
- 遗传学 是一个遗传学.
- 心血管疾病 心血管疾病
- 代谢障碍 代谢障碍 代谢障碍
背景情况:
- 心肌梗塞 (MI) 是全球主要的死亡原因,具有复杂的遗传模式.
- 早期发作的心脏病发作,特别是在年轻人中,受到遗传因素的强烈影响.
- 之前的研究发现了LDL基因的罕见突变以及与心脏病风险相关的众多位点的常见变异.
研究的目的:
- 调查罕见遗传突变对早期心肌梗塞风险的贡献.
- 确定含有与早期心脏病相关的罕见编码序列突变的特定基因.
- 评估这些突变对脂质谱和心脏病发作风险的影响.
主要方法:
- 在9793名患有早期发作的心脏病发作和无心脏病发作的对照人群中进行了整体外体测序.
- 对已识别的基因中罕见的编码序列突变的分析.
- 突变与心脏病发作风险之间的关联测试,以及与血脂水平 (LDL胆固醇,甘油三) 的相关性.
主要成果:
- 两个基因,LDLR和APOA5,在早期的MI病例中,与对照组相比,罕见的编码序列突变的频率显著更高.
- 携带罕见的LDLR突变的人患心脏病的风险增加了4.2倍,零基因基因为13倍的风险.
- 携带APOA5突变的人患心脏病风险增加了2.2倍,与较高的甘油三水平有关,而LDLR突变与较高的LDL胆固醇有关.
结论:
- 罕见的LDLR和APOA5突变是早期心脏病发作风险的重要因素.
- 除了LDL胆固醇外,富含甘油三蛋白脂蛋白的代谢失调在MI的发病过程中发挥着作用.
- 这些发现凸显了罕见突变遗传查在控制心血管疾病风险方面的重要性.
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