title: Lifestyle intervention leading to moderate weight loss normalizes postprandial triacylglycerolemia despite persisting obesity.
abstract: Obesity is associated with impaired postprandial triacylglycerolemia, an independent risk factor for cardiovascular disease. Given that obesity is hard to treat, efforts should focus on treating its comorbidities. We aimed to investigate whether moderate weight loss normalizes postprandial triacylglycerol (TAG) concentrations, in the absence of the acute effects of negative energy balance. For this purpose, postprandial lipemia was investigated in eight obese but otherwise healthy, sedentary men (age: 41.3 ± 4.1 years, BMI: 36.5 ± 1.6 kg·m(-2)), once before and again after a 10% weight loss followed by ≥4 weeks of weight maintenance, and was compared with that of eight age-matched healthy lean men (BMI: 24.7 ± 0.6 kg·m(-2)). Dietary intervention consisted of reduced carbohydrate and saturated fat intake and increased monounsaturated fat intake. Obese volunteers were advised to increase physical activity using pedometers to record daily activity. Postprandial triacylglycerolemia after weight loss was reduced by 27-46% (P < 0.05), and became similar to that of lean men despite persisting obesity (BMI after weight loss: 32.9 ± 1.5 kg·m(-2)). Reduction in postprandial TAG responses was inversely correlated with the decrease in postprandial insulin sensitivity index (ISI) after weight loss (r = -0.714, P = 0.047). We conclude that moderate weight loss induced by a low-carbohydrate and saturated fat diet and a slight increase in daily physical activity normalizes postprandial triacylglycerolemia in obese men, independently of acute diet-induced negative energy balance, and possibly through enhancement of insulin action.
authors.affiliation: Laboratory of Nutrition and Clinical Dietetics, Department of Nutrition and Dietetics, Harokopio University, Athens, Greece.
authors.forename: Maria I
authors.initials: MI
authors.lastname: Maraki
authors.forename: Niki
authors.initials: N
authors.lastname: Aggelopoulou
authors.forename: Nektarios
authors.initials: N
authors.lastname: Christodoulou
authors.forename: Costas A
authors.initials: CA
authors.lastname: Anastasiou
authors.forename: Marina
authors.initials: M
authors.lastname: Toutouza
authors.forename: Demosthenes B
authors.initials: DB
authors.lastname: Panagiotakos
authors.forename: Stavros A
authors.initials: SA
authors.lastname: Kavouras
authors.forename: Faidon
authors.initials: F
authors.lastname: Magkos
authors.forename: Labros S
authors.initials: LS
authors.lastname: Sidossis
mesh_terms: D000328:Adult; D015992:Body Mass Index; D031204:Caloric Restriction; D002318:Cardiovascular Diseases / Q000453:epidemiology / Q000517:prevention & control*; D004038:Diet, Reducing; D006801:Humans; D015228:Hypertriglyceridemia / Q000097:blood / Q000178:diet therapy* / Q000453:epidemiology; D007333:Insulin Resistance; D008297:Male; D009765:Obesity / Q000097:blood / Q000150:complications / Q000178:diet therapy* / Q000453:epidemiology; D019518:Postprandial Period; D040242:Risk Reduction Behavior; D016896:Treatment Outcome; D014280:Triglycerides / Q000097:blood*; D015431:Weight Loss
chemical_list: D014280:Triglycerides