Effects of free fatty acids on insulin sensitivity and hemodynamics during mental stress

Details

Serval ID
serval:BIB_2D67968FDC9B
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Effects of free fatty acids on insulin sensitivity and hemodynamics during mental stress
Journal
Journal of Clinical Endocrinology and Metabolism
Author(s)
Battilana  P., Seematter  G., Schneiter  P., Jequier  E., Tappy  L.
ISSN
0021-972X (Print)
Publication state
Published
Issued date
01/2001
Volume
86
Number
1
Pages
124-8
Notes
Journal Article
Research Support, Non-U.S. Gov't --- Old month value: Jan
Abstract
Mental stress is known to decrease systemic vascular resistance and increase muscle blood flow and to acutely enhance insulin-mediated glucose disposal in healthy humans. These effects are abolished in obese patients. We therefore proposed the hypothesis that elevated free fatty acid levels may be responsible for the abnormal responses to mental stress in obesity by inhibiting endothelial cell function. To test this hypothesis, we studied a group of eight lean females during a hyperinsulinemic clamp study with and without lipid infusion. A 30-min mental stress was applied during 30 min after 150 min of hyperinsulinemia. In the study without lipid infusion, mental stress increased heart rate by 26.5%, blood pressure by 7.9%, and cardiac index (measured with thoracic bioimpedance) by 35.9%; it decreased systemic vascular resistance by 21.9% and increased insulin-mediated glucose disposal by 18.9%. During lipid infusion, the increase in heart rate was not affected, but the increase in cardiac index, the decrease in systemic vascular resistance, and the increase in insulin-mediated glucose disposal were all inhibited. In contrast, the rise in blood pressure was increased about 2-fold (control plus 6 mm Hg vs. lipid plus 13 mm Hg, P: < 0.01). These results indicate that lipid inhibits the stimulation of glucose uptake and enhances the pressor effect of mental stress, presumably by altering endothelial cell function.
Keywords
Adult Blood Glucose/analysis Blood Pressure/drug effects Cardiac Output/drug effects Emulsions Fats/pharmacology Fatty Acids, Nonesterified/*blood Female Hemodynamic Processes/*physiology Humans *Insulin Resistance Norepinephrine/blood Reference Values Stress, Psychological/*physiopathology Vascular Resistance/drug effects
Pubmed
Web of science
Create date
24/01/2008 13:36
Last modification date
20/08/2019 13:12
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