Causal Assessment of Serum Urate Levels in Cardiometabolic Diseases Through a Mendelian Randomization Study

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• 作者：Tanya Keenan ; MD ; MPH^a ; ^b ; Wei Zhao ; MSc^a ; Asif Rasheed ; MBBS^c ; Weang K. Ho ; PhD^d ; Rainer Malik ; PhD^e ; Janine F. Felix ; PhD^f ; Robin Young ; PhD^d ; Nabi Shah ; PhD^c ; Maria Samuel ; MSc^c ; Nasir Sheikh ; MSc^d ; Megan L. Mucksavage ; MSc^a ; Omar Shah ; MD^a ; Jin Li ; PhD^g ; Michael Morley ; PhD^h ; Annika Laser ; MScⁱ ; ^j ; Nadeem Hayat Mallick ; MBBS^k ; Khan Shah Zaman ; MBBS^l ; Mohammad Ishaq ; MBBS^m ; Syed Zahed Rasheed ; MD^m ; Fazal-ur-Rehman Memon ; MBBSⁿ ; Faisal Ahmed ; MBBS^o ; Bashir Hanif ; MD^p ; Muhammad Shakir Lakhani ; MBBS^p ; Muhammad Fahim ; MBBS^c ; Madiha Ishaq ; MBBS^c ; Naresh Kumar Shardha ; MBBS^c ; Naveeduddin Ahmed ; MBBS^q ; Khalid Mahmood ; MBBS^r ; Waseem Iqbal ; MBBS^s ; Saba Akhtar ; MBBS^c ; Rabia Raheel ; MBBS^c ; Christopher J. O'Donnell ; MD ; MPH^t ; ^u ; ^v ; Christian Hengstenberg ; MD^w ; Winifred Mä ; rz ; MD^x ; ^y ; ^z ; Sekar Kathiresan ; MD^u ; ^v ; ^aa ; ^bb ; Nilesh Samani ; MD^cc ; Anuj Goel ; PhD^dd ; Jemma C. Hopewell ; PhD^ee ; John Chambers ; PhD^ff ; Yu-Ching Cheng ; PhD^gg ; Pankaj Sharma ; MD ; PhD^hh ; Qiong Yang ; MDⁱⁱ ; Jonathan Rosand ; MD^jj ; Giorgio B. Boncoraglio ; MD^kk ; Shahana Urooj Kazmi ; PhD^ll ; Hakon Hakonarson ; PhD^g ; Anna Kö ; ttgen ; MD ; MPH^mm ; ⁿⁿ ; Andreas Kalogeropoulos ; MD^oo ; Philippe Frossard ; PhD^c ; Ayeesha Kamal ; MD^pp ; Martin Dichgans ; MD^e ; Thomas Cappola ; MD^qq ; Muredach P. Reilly ; MBBCH ; MSCE^a ; ^qq ; John Danesh ; DPhil^d ; Daniel J. Rader ; MD^a ; Benjamin F. Voight ; PhD^rr ; ^{bvoight@upenn.edu" class="auth_mail" title="E-mail the corresponding author} ; Danish Saleheen ; PhD^a ; ^c ; ^ss ; ^{saleheen@mail.med.upenn.edu" class="auth_mail" title="E-mail the corresponding author}
• 关键词：genetic ; pleiotropy ; single nucleotide polymorphism
• 刊名：Journal of the American College of Cardiology
• 出版年：2016
• 出版时间：2 February 2016
• 年：2016
• 卷：67
• 期：4
• 页码：407-416
• 全文大小：672 K

文摘

Although epidemiological studies have reported positive associations between circulating urate levels and cardiometabolic diseases, causality remains uncertain.

Objectives

Through a Mendelian randomization approach, we assessed whether serum urate levels are causally relevant in type 2 diabetes mellitus (T2DM), coronary heart disease (CHD), ischemic stroke, and heart failure (HF).

Methods

This study investigated 28 single nucleotide polymorphisms known to regulate serum urate levels in association with various vascular and nonvascular risk factors to assess pleiotropy. To limit genetic confounding, 14 single nucleotide polymorphisms exclusively associated with serum urate levels were used in a genetic risk score to assess associations with the following cardiometabolic diseases (cases/controls): T2DM (26,488/83,964), CHD (54,501/68,275), ischemic stroke (14,779/67,312), and HF (4,526/18,400). As a positive control, this study also investigated our genetic instrument in 3,151 gout cases and 68,350 controls.

Results

Serum urate levels, increased by 1 SD due to the genetic score, were not associated with T2DM, CHD, ischemic stroke, or HF. These results were in contrast with previous prospective studies that did observe increased risks of these 4 cardiometabolic diseases for an equivalent increase in circulating urate levels. However, a 1 SD increase in serum urate levels due to the genetic score was associated with increased risk of gout (odds ratio: 5.84; 95% confidence interval: 4.56 to 7.49), which was directionally consistent with previous observations.

Conclusions

Evidence from this study does not support a causal role of circulating serum urate levels in T2DM, CHD, ischemic stroke, or HF. Decreasing serum urate levels may not translate into risk reductions for cardiometabolic conditions.