RS2289487 variation in PERILIPIN gene is a predictor of weight loss and protection against impaired glucose metabolism after a meal-replacement diet in postmenopausal obese females

OBJECTIVE: The PERILIPIN1 (PLIN1) gene encodes an adipocyte-associated protein that modulates weight. The objective was to evaluate the role of the rs2289487 genetic variant of the PLIN1 gene on weight loss and glucose metabolism secondary to a partial meal replacement (pMR) hypocaloric diet. PATIENTS AND METHODS: We conducted an interventional study in 111 postmenopausal obese females with body mass index (BMI) > 35 kg/m(2). The subjects received two intakes per day of a normocaloric hyperproteic formula for 12 weeks. RESULTS: After the pMR diet, body weight, (BMI), fat mass, waist circumference, fasting insulin levels and HOMA-IR decreased in both genotype groups. The improvements in these parameters were higher in C allele carriers than in subjects with TT genotype. The percentage of patients who achieved 7.5% weight loss was higher in the C carriers (57.4% vs. 27.6%), (adjusted Odds Ratio 2.14, 95% CI = 1.33-9.40; p = 0.02). The decrease in the percentage of diabetes mellitus or impaired fasting glucose decrease was statistically significant in C allele carriers (30.2% vs. 18.9%; p = 0.01) (OR 0.54, 95% CI = 0.22-0.78; p = 0.02). CONCLUSIONS: The C allele of rs2289487predicts the magnitude of weight loss resulting from a pMR diet. These adiposity improvements produce a better improvement in insulin resistance and the percentage of impaired glucose metabolism.