Objective: To determine the relationship of the gain-of-function variant A750T in leucine-rich repeat containing G protein-coupled receptor 4 (LGR4) with central obesity and related metabolic phenotypes.
Methods: The LGR4 A750T (c.2248 G > A) variant was detected by Sanger sequencing in a discovery young population and a validation community-based population with obesity from eastern China. Fat indices determined by anthropometry and computed tomography scans and clinical biochemical measurements were collected for association analysis.
Results: LGR4 A750T was significantly correlated with waist circumference (P = 0.030) and waist-to-height ratio (P < 0.001) in the young cohort (N = 594) and with waist-to-hip ratio (P = 0.013) in the community population (N = 1067). Combined analysis showed a significant correlation of the variant with waist circumference (P < 0.001) and waist-to-hip ratio (P = 0.021). Moreover, the variant had a remarkable correlation with abdominal visceral fat area (P = 0.004) and was associated with 2-h plasma insulin (P = 0.009) and the Matsuda index (P = 0.027) after an oral glucose tolerance test in young subjects with obesity.
Conclusions: The LGR4 A750T variant may contribute to central obesity characterized by abdominal visceral fat accumulation.
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