title: The impact of obesity-related SNP on appetite and energy intake.
abstract: An increasing number of studies have reported a heritable component for the regulation of energy intake and eating behaviour, although the individual polymorphisms and their ‘effect size’ are not fully elucidated. The aim of the present study was to examine the relationship between specific SNP and appetite responses and energy intake in overweight men. In a randomised cross-over trial, forty overweight men (age 32 (sd 09) years; BMI 27 (sd 2) kg/m2) attended four sessions 1 week apart and received three isoenergetic and isovolumetric servings of dairy snacks or water (control) in random order. Appetite ratings were determined using visual analogue scales and energy intake at an ad libitum lunch was assessed 90 min after the dairy snacks. Individuals were genotyped for SNP in the fat mass and obesity-associated (FTO), leptin (LEP), leptin receptor (LEPR) genes and a variant near the melanocortin-4 receptor (MC4R) locus. The postprandial fullness rating over the full experiment following intake of the different snacks was 17·2 % (P= 0·026) lower in A carriers compared with TT homozygotes for rs9939609 (FTO, dominant) and 18·6 % (P= 0·020) lower in G carriers compared with AA homozygotes for rs7799039 (LEP, dominant). These observations indicate that FTO and LEP polymorphisms are related to the variation in the feeling of fullness and may play a role in the regulation of food intake. Further studies are required to confirm these initial observations and investigate the ‘penetrance’ of these genotypes in additional population subgroups.
authors: Hugh Sinclair Human Nutrition Group, Food and Nutritional Sciences, Faculty of Life Sciences, University of Reading, Reading RG6 6AP, UK.
authors: Anestis
authors: A
authors: Dougkas
authors: Parveen
authors: P
authors: Yaqoob
authors: D Ian
authors: DI
authors: Givens
authors: Christopher K
authors: CK
authors: Reynolds
authors: Anne M
authors: AM
authors: Minihane
mesh_terms: D000293:Adolescent; D000328:Adult; D000071516:Alpha-Ketoglutarate-Dependent Dioxygenase FTO; D001066:Appetite / Q000235:genetics*; D004435:Eating; D002149:Energy Intake / Q000235:genetics*; D005247:Feeding Behavior; D005838:Genotype; D006801:Humans; D020738:Leptin / Q000235:genetics; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide; D019518:Postprandial Period; D011506:Proteins / Q000235:genetics / Q000378:metabolism*; D055815:Young Adult
chemical_list: D020738:Leptin; D011506:Proteins; D000071516:Alpha-Ketoglutarate-Dependent Dioxygenase FTO; C526492:FTO protein, human