The peroxisome proliferator-activated receptor-gamma2 Pro12Ala polymorphism

Area of Science:

• Genetics and Molecular Biology
• Endocrinology
• Metabolic Diseases

Background:

• Peroxisome proliferator-activated receptor (PPAR)-gamma is crucial for adipocyte differentiation.
• The Pro12Ala polymorphism in PPAR-gamma2 is common and linked to type 2 diabetes risk.
• The Pro allele is highly prevalent, contributing significantly to population-attributable risk.

Purpose of the Study:

• To investigate the role of the PPAR-gamma2 Pro12Ala polymorphism in type 2 diabetes.
• To elucidate the mechanisms by which this polymorphism affects metabolic parameters.
• To assess the population-level impact and potential modulators of the polymorphism's effect.

Main Methods:

• Analysis of the Pro12Ala polymorphism in the PPAR-gamma2 gene.
• Assessment of in vivo effects related to adipose tissue function.
• Evaluation of the modulation of adipose-derived factors impacting insulin sensitivity.

Main Results:

• The Pro12Ala polymorphism alters PPAR-gamma2 transcriptional activity, affecting adipose tissue function.
• Modulated release of adipokines (e.g., adiponectin) and inflammatory factors (e.g., TNF-alpha, resistin) influences insulin sensitivity.
• The polymorphism demonstrates a significant population-attributable risk for type 2 diabetes.

Conclusions:

• The PPAR-gamma2 Pro12Ala polymorphism is the first identified genetic variant with a substantial impact on common type 2 diabetes risk.
• Understanding its mechanism may pave the way for new diagnostic, preventive, and therapeutic strategies for type 2 diabetes.
• Environmental and genetic factors may modulate the population effect of this polymorphism.