4.6 Article

Effect of Acute Negative and Positive Energy Balance on Basal Very-Low Density Lipoprotein Triglyceride Metabolism in Women

Journal

PLOS ONE
Volume 8, Issue 3, Pages -

Publisher

PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0060251

Keywords

-

Funding

  1. Department of Nutrition and Dietetics of Harokopio University
  2. Hellenic Heart Foundation
  3. Greek Governmental Institute of Scholarships
  4. Institute for Translational Sciences at the University of Texas Medical Branch
  5. Clinical and Translational Science Award from the National Center for Advancing Translational Sciences, National Institutes of Health [UL1TR000071]
  6. Shriners Hospital for Children [SSF 84090]
  7. Sealy Center on Aging, University of Texas Medical Branch at Galveston

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Background: Acute reduction in dietary energy intake reduces very low-density lipoprotein triglyceride (VLDL-TG) concentration. Although chronic dietary energy surplus and obesity are associated with hypertriglyceridemia, the effect of acute overfeeding on VLDL-TG metabolism is not known. Objective: The aim of the present study was to investigate the effects of acute negative and positive energy balance on VLDL-TG metabolism in healthy women. Design: Ten healthy women (age: 22.0+/-2.9 years, BMI: 21.2+/-1.3 kg/m(2)) underwent a stable isotopically labeled tracer infusion study to determine basal VLDL-TG kinetics after performing, in random order, three experimental trials on the previous day: i) isocaloric feeding (control) ii) hypocaloric feeding with a dietary energy restriction of 2.89+/-0.42 MJ and iii) hypercaloric feeding with a dietary energy surplus of 2.91+/-0.32 MJ. The three diets had the same macronutrient composition. Results: Fasting plasma VLDL-TG concentrations decreased by similar to 26% after hypocaloric feeding relative to the control trial (P = 0.037), owing to decreased hepatic VLDL-TG secretion rate (by 21%, P = 0.023) and increased VLDL-TG plasma clearance rate (by similar to 12%, P = 0.016). Hypercaloric feeding increased plasma glucose concentration (P = 0.042) but had no effect on VLDL-TG concentration and kinetics compared to the control trial. Conclusion: Acute dietary energy deficit (similar to 3MJ) leads to hypotriglyceridemia via a combination of decreased hepatic VLDL-TG secretion and increased VLDL-TG clearance. On the other hand, acute dietary energy surplus (similar to 3MJ) does not affect basal VLDL-TG metabolism but disrupts glucose homeostasis in healthy women.

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