کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2895330 1172457 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Endothelial dysfunction induced by postprandial lipemia is neutralized by addition of proteins to the fatty meal
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی کاردیولوژی و پزشکی قلب و عروق
پیش نمایش صفحه اول مقاله
Endothelial dysfunction induced by postprandial lipemia is neutralized by addition of proteins to the fatty meal
چکیده انگلیسی

BackgroundPostprandial lipemia is known to reduce endothelium-dependent flow-mediated vasodilation (FMD). Because postprandial lipemia can be acutely mitigated when proteins are added to the fatty meal, we investigated whether this mitigation could neutralize the lipemia-induced endothelial dysfunction.DesignSixteen healthy students (aged 19–23, eight males and eight females) received three different test meals at intervals of 1 week between successive tests. Each meal contained whipping cream alone or whipping cream together with either caseinate or soy protein. The whipping cream contained 33% fat, and 3 ml (= 1 g fat) was given per kg body weight. The proteins added were either 50 g sodium caseinate or 50 g soy protein. FMD was assessed by two-dimensional ultrasonography of the brachial artery in the fasting state and 1, 2, 3, 4, 5, 6, 7, and 8 h after the fatty meal. Blood was withdrawn at the same time-points from the other arm. Triglycerides, free fatty acids, and insulin were determined using routine methods, and both l-arginine and asymmetric dimethylarginine (ADMA) were determined by LC-MS.ResultsPostprandial lipemia reduced FMD, the reduction reaching a maximum of 58% after 3 h. This impairment of endothelial function was not observed when either of the test proteins had been added to the fatty meal (p < 0.01 for caseinate and p < 0.001 for soy protein). The effects of the protein addition were decreases in triglycerides and free fatty acids, increased insulin concentrations at all time-points, and an increased arginine/ADMA ratio between 1 and 5 h after the meal, particularly in the case of the soy protein.ConclusionWe suggest that the neutralization of the lipemia-induced endothelial dysfunction is caused by direct and indirect effects of the proteins insulinotropy and, secondly, by an increased supply of l-arginine.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atherosclerosis - Volume 185, Issue 2, April 2006, Pages 313–319
نویسندگان
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