Does the rs9939609 FTO gene polymorphism affect fat percentage? A meta-analysis

Area of Science:

• Genetics and Genomics
• Metabolic Health
• Obesity Research

Background:

• The fat mass and obesity-associated (FTO) gene is a key player in regulating body weight and adiposity.
• Genetic variations within the FTO gene, such as the rs9939609 polymorphism, have been implicated in obesity risk.
• Understanding the specific impact of FTO rs9939609 on body fat percentage is crucial for personalized metabolic health strategies.

Approach:

• A comprehensive meta-analysis was conducted, systematically searching major scientific databases (PubMed, Web of Science, Scopus, Embase).
• Studies investigating the association between the FTO rs9939609 polymorphism and body fat percentage (BF%) were identified and included based on predefined criteria.
• Statistical analysis was performed to synthesize the data and determine the overall effect of the polymorphism on BF%.

Key Points:

• The meta-analysis revealed a significant association between FTO rs9939609 genotypes and body fat percentage.
• Carriers of the A allele of the FTO rs9939609 polymorphism exhibited higher BF%.
• Specifically, the TT genotype was significantly associated with higher BF% compared to both AA and AT genotypes (p < 0.05).

Conclusions:

• The FTO rs9939609 polymorphism is a significant genetic determinant of body fat percentage.
• Individuals with the A allele of FTO rs9939609 are predisposed to higher body fat accumulation.
• These findings contribute to the genetic understanding of obesity and may inform future interventions targeting FTO gene variants.