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门德尔的随机化不支持糖尿病对大动脉疾病的因果关系
Tao Yang1, Xin Yuan1, Wei Gao1
1Department of Cardiovascular Surgery, Cardiovascular Institute and Fu Wai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, National Center for Cardiovascular Diseases, No. 167 North Lishi Road, Xicheng District, Beijing, 100037, China.
这项研究发现糖尿病和大动脉疾病 (如动脉瘤或剖析) 之间没有因果关系. 以前的反向关联可能是由于混或反向因果关系,而不是糖尿病的直接影响.
科学领域:
- 心血管遗传学 心血管遗传学
- 代谢疾病 代谢疾病
- 流行病学 流行病学
背景情况:
- 观察性研究表明,糖尿病和大动脉疾病 (动脉瘤,剖析) 之间存在反向关系.
- 这种观察到的关联的因果关系依据仍然未确定.
- 研究遗传因果关系对于理解糖尿病与大动脉疾病的关系至关重要.
研究的目的:
- 确定糖尿病和相关的血糖特征对大动脉疾病的因果关系.
- 使用孟德尔随机化来评估糖尿病的遗传倾向及其对大动脉动脉瘤和剖析风险的影响.
主要方法:
- 孟德尔的随机化分析使用来自大型全基因组关联研究的摘要级数据.
- 主要分析采用了反变量加权 (IVW) 方法.
- 敏感性分析包括加权中位数,MR-Egger和多变量MR,以确保稳定性.
主要成果:
- 在1型糖尿病,2型糖尿病,禁食葡萄糖,禁食胰岛素或糖化血红蛋白和大动脉剖析之间没有发现因果关系.
- 同样,对于这些与糖尿病相关的特征在大动脉动脉瘤上没有观察到因果关系.
- 灵敏度分析证实了这些发现,没有证据表明有定向的向性.
结论:
- 糖尿病似乎对大动脉解剖或大动脉动脉瘤的风险没有因果关系.
- 在之前的观察性研究中报告的反向关联可能归因于混因素或反向因果关系.
- 遗传证据支持糖尿病和大动脉疾病发展之间没有直接的因果关系.
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