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Updated: Aug 15, 2026

Hyperinsulinemic-euglycemic Clamps in Conscious, Unrestrained Mice
Published on: November 16, 2011
Association of leptin receptor polymorphism with insulin resistance
Ken C Chiu1, Audrey Chu, Lee-Ming Chuang
1Division of Clinical Epidemiology and Preventive Medicine, Department of Medicine, UCLA School of Medicine, University of California-Los Angeles, 924 Westwood Boulevard #335, Los Angeles, CA 90024, USA. kchiu@mednet.ucla.edu
Objective:
Although the role of the leptin receptor (LEPR) in obesity is well recognized, its role in insulin sensitivity remains unknown.
Design:
This was a cross-sectional study to investigate the impact of the Q223R polymorphism of the LEPR gene on insulin sensitivity.
Methods:
Sixty-seven glucose-tolerant Caucasians were enrolled. The insulin sensitivity index and glucose clearance were measured using a hyperglycemic clamp. Genomic DNA was extracted for genotyping.
Results:
We identified 20 QQ, 31 QR, and 16 RR subjects. The three genotypic groups were similar in age, gender distribution, body mass index, waist-hip ratio, and blood pressure, but differed in the insulin sensitivity index (P=0.0180) and in glucose clearance (P=0.0220). Multivariate analyses showed that the Q223R polymorphism was independently associated with the insulin sensitivity index (P=0.0317) and glucose clearance (P=0.0436). A trend of increasing low density lipoprotein cholesterol concentration was also observed (P=0.0447).
Conclusion:
We have reported the first association of the Q223R polymorphism of the LEPR gene with insulin resistance.
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