PMID- 26382929 OWN - NLM STAT- MEDLINE DCOM- 20160201 LR - 20151021 IS - 1475-2662 (Electronic) IS - 0007-1145 (Linking) VI - 114 IP - 10 DP - 2015 Nov 28 TI - Lean and obese dietary phenotypes: differences in energy and substrate metabolism and appetite. PG - 1724-33 LID - 10.1017/S0007114515003402 [doi] AB - This study aimed to characterise lean and obese phenotypes according to diet and body composition, and to compare fasting and postprandial appetite and metabolic profiles following a high-fat test meal. A total of ten lean (BMI40 and 30 kg/m2) high-fat consumers (OHF; >40 % energy from fat) were recruited. Before and following the test meal (4727 kJ (1130 kcal), 77 % fat, 20 % carbohydrate (CHO) and 3 % protein), fasting plasma glucose, insulin, leptin, ghrelin, peptide YY (PYY), RER, RMR and subjective appetite ratings (AR) were measured for 6 h. Thereafter, subjects consumed a self-selected portion of a standardised post-test meal (40 % fat, 45 % CHO and 15 % protein) and reported AR. Fasting (P=0.01) and postprandial (P<0.001) fat oxidation was significantly higher in LHF than in LLF but was not different between LHF and OHF. Although similar between the lean groups, fasting and postprandial energy expenditures were significantly higher in OHF compared with LHF (P<0.01). Despite similar AR across groups, LLF consumed a relatively greater quantity of the post-test meal than did LHF (7.87 (sd 2.96) v. 7.23 (sd 2.67) g/kg, P=0.013). The lean groups showed appropriate changes in plasma ghrelin and PYY following the test meal, whereas the OHF group showed a blunted response. In conclusion, the LHF phenotype had a greater capacity for fat oxidation, which may be protective against weight gain. OHF individuals had a blunted appetite hormone response to the high-fat test meal, which may subsequently increase energy intake, driving further weight gain. FAU - Clamp, Louise AU - Clamp L AD - 1Department of Human Biology,Division of Exercise Science and Sports Medicine, Faculty of Health Sciences,University of Cape Town,Cape Town 7725,South Africa. FAU - Hehir, Anthony P J AU - Hehir AP AD - 2Department of Human Biology,Division of Nutrition and Dietetics, Faculty of Health Sciences,University of Cape Town,Cape Town 7925,South Africa. FAU - Lambert, Estelle V AU - Lambert EV AD - 1Department of Human Biology,Division of Exercise Science and Sports Medicine, Faculty of Health Sciences,University of Cape Town,Cape Town 7725,South Africa. FAU - Beglinger, Christoph AU - Beglinger C AD - 3Division of Gastroenterology,University Hospital,4031 Basel,Switzerland. FAU - Goedecke, Julia H AU - Goedecke JH AD - 4Non-communicable Disease Research Unit,South African Medical Research Council,Tygerberg 7505,South Africa. LA - eng PT - Journal Article DEP - 20150918 PL - England TA - Br J Nutr JT - The British journal of nutrition JID - 0372547 RN - 0 (Dietary Fats) RN - 0 (Ghrelin) RN - 106388-42-5 (Peptide YY) SB - IM MH - Adult MH - Appetite/*physiology MH - Basal Metabolism MH - Body Composition MH - Body Mass Index MH - *Diet MH - Diet, High-Fat MH - Dietary Fats/metabolism MH - Energy Intake MH - Fasting MH - Female MH - Ghrelin/blood MH - Humans MH - Obesity/*metabolism/*physiopathology MH - Oxidation-Reduction MH - Peptide YY/blood MH - Phenotype MH - Postprandial Period MH - Satiation/physiology MH - Surveys and Questionnaires MH - Thinness/*metabolism MH - Weight Gain/physiology OTO - NOTNLM OT - AR appetite ratings OT - CHO carbohydrate OT - Diet OT - FFM fat-free mass OT - Fat oxidation OT - Ghrelin OT - LHF lean high-fat OT - LLF lean low-fat OT - OHF obese high-fat OT - PYY peptide YY OT - Peptide YY OT - RER OT - RMR OT - SFQ Short Fat Questionnaire OT - TE total energy OT - TFEQ Three Factor Eating Questionnaire EDAT- 2015/09/19 06:00 MHDA- 2016/02/02 06:00 CRDT- 2015/09/19 06:00 PHST- 2015/09/19 06:00 [entrez] PHST- 2015/09/19 06:00 [pubmed] PHST- 2016/02/02 06:00 [medline] AID - S0007114515003402 [pii] AID - 10.1017/S0007114515003402 [doi] PST - ppublish SO - Br J Nutr. 2015 Nov 28;114(10):1724-33. doi: 10.1017/S0007114515003402. Epub 2015 Sep 18.