孟德尔随机化在痛风研究中的应用进展

A Review of the Application of Mendelian Randomization in Gout Research

  • 摘要: 为规避传统观察性研究的固有局限,孟德尔随机化(Mendelian randomization, MR)已被广泛用于探究痛风的因果危险因素。本文梳理了MR方法在痛风中的应用进展。现有证据表明,就痛风结局而言,体质量指数升高、动脉粥样硬化型血脂异常及酒精摄入是较为明确的危险因素,而高血压、身体活动、吸烟及咖啡摄入等因素的因果作用尚不确定。就血尿酸水平或高尿酸血症结局而言,体质量指数升高、腹型肥胖、2型糖尿病易感性、糖摄入及较低的身体活动等与血尿酸水平升高存在因果关联。反向分析提示,遗传预测的高血尿酸水平与2型糖尿病、胰岛素抵抗及尿路结石均无明确因果关联;而遗传易感的痛风与高血压风险升高及结直肠癌风险降低有关。尽管MR研究面临水平多效性、人群代表性不足等挑战,但整合多组学、深化药物靶点MR及拓展至非欧洲人群是其未来重要发展方向,有望为痛风的精准防治提供关键理论依据。

     

    Abstract: To overcome the inherent limitations of traditional observational studies, Mendelian randomization (MR) has been widely applied to investigate the causal risk factors for gout. This article reviews recent advances in the application of MR to gout research. Current evidence indicates that, with gout as the outcome, elevated body mass index, atherogenic dyslipidemia, and alcohol consumption are relatively well-established causal risk factors, whereas the causal roles of hypertension, physical activity, smoking, and coffee intake remain uncertain. With serum urate levels or hyperuricemia as the outcome, higher body mass index, abdominal obesity, genetic susceptibility to type 2 diabetes, sugar intake, and lower levels of physical activity have been shown to be causally associated with increased serum urate levels. Reverse MR analyses suggest that genetically predicted elevated serum urate levels are not clearly causally associated with type 2 diabetes, insulin resistance, or urolithiasis; in contrast, genetic liability to gout appears to be associated with an increased risk of hypertension and a decreased risk of colorectal cancer. Although MR studies still face challenges such as horizontal pleiotropy and limited population representativeness, future directions include integrating multi-omics data, advancing drug-target MR, and expanding research to non-European populations, which may provide important theoretical support for the precision prevention and treatment of gout.

     

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