论文标题:Vitamin D and cause-specific vascular disease and mortality: a Mendelian randomisation study involving 99,012 Chinese and 106,911 European adults
期刊:BMC Medicine
作者:Tao Huang, Shoaib Afzal, Canqing Yu, Yu Guo, Zheng Bian, Ling Yang, Iona Y. Millwood, Robin G. Walters, Yiping Chen, Ningyu Chen, Ruqin Gao, Junshi Chen, Robert Clarke, Zhengming Chen, Christina Ellervik, Børge G. Nordestgaard, Jun Lv, Liming Li on behalf of the China Kadoorie Biobank Collaborative Group
现任北京大学公共卫生学院流行病与卫生统计学系、教育部分子心血管病学重点实验室 研究员,博士生导师。担任SCI杂志APJCN统计编辑、Lipids in Health and Disease副主编。目前担任中国健康管理协会膳食营养与健康分会常务理事、中国营养学会营养流行病学分会理事、中国营养学会食物与烹饪营养分会理事、中华预防医学会流行病学分会青年委员、中华流行病学杂志通讯编委。主要研究领域:慢性病流行病学、因果推断、遗传相关性、队列数据整合与应用。
Randomised control trials and genetic analyses have demonstrated that vitamin D or 25-hydroxyvitamin D (25[OH]D) levels may not play a causal role in the development of cardiovascular disease. However, it is unclear if 25(OH)D is causally associated with cause-specific vascular disease and lipids. Therefore, we examined the causal association of 25(OH)D with myocardial infarction, stroke, ischaemic heart disease, ischaemic stroke, subarachnoid haemorrhage, intracerebral haemorrhage, and lipid levels among both Chinese and Europeans.
Methods
We used a Mendelian randomisation (MR) design in the China Kadoorie Biobank, the Copenhagen City Heart Study, and the Copenhagen General Population Study. The 25(OH)D-related genetic variants in the CYP2R1 and DCHR7 genes were genotyped in 99,012 Chinese adults and 106,911 Danish adults.
Results
In Chinese adults, plasma 25(OH)D levels were not significantly associated with cause-specific vascular disease or mortality, with the exception of intracerebral haemorrhage (HR, 1.09 [95% CI, 1.01,1.18] per 25 nmol/L higher plasma 25(OH)D). In Europeans, plasma 25(OH)D levels were inversely associated with all types of vascular diseases and mortality. However, MR analysis did not demonstrate causal associations of genetically increased 25(OH)D levels with cause-specific vascular diseases, or mortality in both Chinese and European adults. In addition, each 25 nmol/L higher 25(OH)D was observationally associated with lower total cholesterol and low-density lipoprotein cholesterol levels, but higher high-density lipoprotein cholesterol levels. Likewise, MR analysis showed that 25(OH)D levels were not causally associated with lipids in both Chinese and European adults after Bonferroni correction.
Conclusions
We found no evidence to support that genetically increased 25(OH)D was associated with a lower risk of ischaemic stroke, intracerebral haemorrhage, subarachnoid haemorrhage, and lipid levels in both Chinese and European adults. These results suggest that the inverse associations of vitamin D with vascular disease could be the result of confounding.