Associatie tussen HTR2C-polymorfismen en gewichtsverlies bij patiënten met obesitas

Abstract

OBJECTIVE To investigate whether the HTR2C rsUU334 and 759 C/T polymorphisms are associated with weight loss in an anti- obesity programme. DESIGN AND METHODS A longitudinal observational follow-up study was used to assess the association between HTR2C genotypes and weight loss during a nine month programme in an obesity clinic. Caucasian patients aged 18 years or older were included. Data were extracted from the patients' medical records. In total, 128 patients were included 129 males). RESULTS There was a significant association between the HTR2C 759 T allele and resistance to weight loss in the first month of the programme. For each T allele present, there was 0.78% (95% confidence interval [95%-CI] 0.19-1.38; P = 0.011 less weight loss (as a percentage of the body weight at start). Patients carrying the variant HTR2C 759 T allele were also less likely to reach > 7% weight loss (odds ratio [OR] 0.23; 95%-CI 0.06- 0,85; P = 0.028), and dropped out of the programme sooner [-0.78 months; 95%-CI -1.51- -0.06; P = 0.035; corrected for gender). No associations with the HTR2C rsUU334- genotype and any of the primary endpoints for weight loss or secondary endpoints were found. CONCLUSION Patients carrying the HTR2C 759 T allele were more resistant to weight loss and dropped out of the programme sooner. However, these effects were small and only explained a small part of a very complex puzzle. Genotyping HTR2C to predict a patient's chance of success in an obesity clinic is therefore not warranted.