کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3277017 1208600 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Amino acid supplementation decreases plasma and liver triacylglycerols in elderly
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی غدد درون ریز، دیابت و متابولیسم
پیش نمایش صفحه اول مقاله
Amino acid supplementation decreases plasma and liver triacylglycerols in elderly
چکیده انگلیسی

ObjectiveHypertriglyceridemia is a risk factor for coronary heart disease. The aim of this study was to determine the effect of amino acid (AA) supplementation on plasma, liver, and muscle lipid concentrations and insulin sensitivity in the elderly.MethodsTwelve impaired glucose tolerant elderly (mean ± SD 67.0 ± 5.6 y of age, seven women and five men) ingested 11 g of essential AAs plus arginine twice a day for 16 wk, after a 7-wk control run-in. Diet and activity were not otherwise modified. Plasma lipid concentrations and oral glucose tolerance were measured every fourth week and tissue lipid concentrations (magnetic resonance spectroscopy) every eighth week.ResultsNo changes in plasma lipids were observed during the control run-in. AA supplementation lowered plasma triacylglycerol (TG; P < 0.001), total cholesterol (P = 0.048), and very low-density lipoprotein cholesterol (P < 0.001) concentrations. Plasma TG decreased ∼20% from the initial value of 1.45 ± 0.18 mmol/L (mean ± SE, 128 ± 16 mg/dL), with the greatest decrease in the subjects starting out with the highest concentrations (r = −0.83). Similarly, liver fat content (liver TG/Intralipid standard) decreased ∼50% from the initial value of 0.34 ± 0.06 (P = 0.021, n = 8), with the greatest decrease in the subjects who initially had the highest values (r = −0.86). Intramuscular fat content and insulin sensitivity did not change.ConclusionDiet supplementation with AAs lowers plasma TG, total cholesterol, and very low-density lipoprotein cholesterol concentrations and liver lipid content in impaired glucose tolerant elderly. AA supplementation may have a potential role in the treatment of hypertriglyceridemia or hepatic steatosis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nutrition - Volume 25, Issue 3, March 2009, Pages 281–288
نویسندگان
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