Preliminary findings on the role of PLIN1 polymorphisms on body composition and energy metabolism response to energy restriction in obese women

The aim of the present study was to investigate the association of PLIN1 114820 > A (rs894160) and PLIN1 13041A > G (rs2304795) polymorphisms with body composition, energy and substrate metabolism, and the metabolic response to a 12-week energy-restricted diet in obese women. The study comprised a total of seventy-eight obese (BMI 34.0 (SD 2.8) kg/m(2)) women (age 36.7 (SD 7) years). We measured weight, height and waist circumference before and after a 12-week controlled energy-restricted diet intervention. Body fat mass and lean mass were measured by dual-energy X-ray absorptiometry. RMR and lipid oxidation rate were measured by indirect calorimetry. We also analysed fasting plasma glucose, insulin, cholesterol and leptin. Women carrying the 11482A allele had a lower reduction in waist circumference than non-A allele carriers (3.2 (SD 0.5) v. 4.6 (SD 0.6)%, respectively, P=0.047; P for gene-diet interaction=0.064). Moreover, women with the 11482A allele had a higher decrease in lipid oxidation rate than non-A allele carriers (58.9 (SD 6.7) v. 31.3 (SD 8.2)%, respectively, P=0.012; P for gene-diet interaction= 0004). There was no interaction effect between the 13041A > G polymorphism and diet-induced changes on the outcome variables (all P > 0.1). These results confirm and extend previous findings suggesting that the PLIN1 114820 > A polymorphism plays a modulating role on diet-induced changes in body fat and energy metabolism in obese women.