Elucidating the Linkage Between Obesity‐Related Body Fat Indicators and Atrial Fibrillation: Supported by Evidence From Mendelian Randomization and Mediation Analyses

作者：Jun‐Xian Wang, Shengzhi Zhou, Xiaoming Xie, Wenlin Liu · 发表于：Clinical Cardiology · 年份：2025 · DOI：10.1002/clc.70103 · 被引用次数：7 · 研究领域：Genetic Associations and Epidemiology、Atrial Fibrillation Management and Outcomes、Cardiovascular Disease and Adiposity

ABSTRACT Objectives To elucidating the linkage between obesity‐associated body fat indicators and atrial fibrillation (AF) using Mendelian Randomization (MR) and mediation analysis. Methods The study utilized three independent genome‐wide association study (GWAS) datasets, with containing over 450 000 individuals each, to represent body fat indicators as the exposure variable. Additionally, two summary genetic datasets of AF were utilized as the clinical outcome. Single nucleotide polymorphisms (SNPs) with p ‐values less than 5 × 10 −10 were identified as instrumental variables (IVs) for MR analysis. The primary analysis method employed was the inverse‐variance weighting (IVW) model, supplemented by three additional models: MR‐Egger regression, weighted median, and maximum likelihood. Sensitivity analysis was conducted, encompassing tests for heterogeneity and horizontal pleiotropy, utilizing Cochran's Q, MR‐Egger intercept, and MR‐PRESSO tests to validate the reliability of the findings. Furthermore, a mediation analysis was conducted to explore potential mediators involved in the pathogenesis of AF. Results The IVW model demonstrated that per 1‐SD increase in body fat indicators (body fat percentage, whole body fat mass, and trunk fat mass) is associated with an elevated risk of AF, with values of 63.1%, 55.0%, and 55.8% respectively. All three supplementary models arrived comparable conclusions with IVW model. The sensitivity analysis confirmed the absence of horizontal pl...