Background And Aims: The C385A polymorphism of FAAH gene (rs324420C>A) has been associated with obesity. We investigate the role of this polymorphism on anthropometric and metabolic responses after an enriched monounsaturated fat hypocaloric diet.
Methods: A sample of 95 obese individuals was analyzed at baseline and after 3 months of an enriched monounsaturated fat hypocaloric diet.
Results: Sixty two patients (65.3%) had the genotype C385C and 33 (34.7%) patients had C385A genotype (30 patients, 31.6%) or A358A (3 patients, 3.2%) (A carriers group). In subjects with C385C genotype, insulin (-1.9±5.3 mUI/l) and HOMA-R (-0.48±0.75 U) decreased. In A carriers subjects, the decreases in weight were 3.7±3.4 kg (decrease in C385C genotype group 4.4±3.6 kg), fat mass 2.7±3.2 kg (decrease in C385C genotype group 3.4±3.2 kg) and waist circumference 3.1±3.4cm (decrease in C385 genotype group 4.4±4.6 cm). These changes were significantly higher in the C385C genotype group than the A carriers subjects.
Conclusion: After weight loss, noncarriers of the allele A385 of FAAH had an improvement on insulin and HOMA-R levels with an enriched monounsaturated fat hypocaloric diet. A better response of weight, fat mass and waist circumference was observed in C385 genotype subjects than A carriers participants.
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