Cited by 118Lipid metabolism and disordersCholesterol and Lipid MetabolismLipid metabolism and biosynthesis

Use of stable isotopically labeled tracers to measure very low density lipoprotein-triglyceride turnover

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Patterson, Bruce W., Mittendorfer, Bettina, Elias, Nizar, Satyanarayana, Raj, Klein, Samuel·2002·Journal of Lipid Research

Abstract

Tracer methods for VLDL-TG kinetics vary in their ability to account for the effect of tracer recycling, which can influence the calculation of VLDL-TG fractional catabolic rates (FCRs). We evaluated a novel approach, involving stable isotopically labeled glycerol or palmitate tracers in conjunction with compartmental modeling, for measuring VLDL-TG kinetics in normolipidemic human subjects. When administered as a bolus simultaneously, both tracers provided identical VLDL-TG FCRs when the data were analyzed by a compartmental model that accounted for hepatic lipid tracer recycling, but not by non-compartmental analysis. The model-derived FCR was greater than that determined using a non-compartmental approach, and was 2- to 3-fold higher than that usually reported by using a bolus of radioactive [3H]glycerol. When palmitate tracer was given as a constant infusion, VLDL-TG turnover appeared 5-fold slower, because tracer recycling through hepatic lipid pools could not be resolved with the infusion protocol. We conclude that accounting for tracer recycling, particularly the contribution of hepatic glycerolipid pools, is essential to accurately measure VLDL-TG kinetics, and that bolus injection of stable isotopically labeled glycerol or palmitate tracers in conjunction with compartmental modeling analysis offers a reliable approach for measuring VLDL-TG kinetics.

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  • At metabolic steady state, the fraction of the pool that is synthesized per unit time equals the fraction of the pool catabolized per unit time (FCR), which can be calculated as the negative of the slope of the natural log of TTR plotted over time.

    “At metabolic steady state, the fraction of the pool that is synthesized per unit time equals the fraction of the pool catabolized per unit time (FCR), which can be calculated as the negative of the slope of the natural log of TTR plotted over time [53].”

    From Measurement of apolipoprotein E and amyloid β clearance rates in the mouse brain using bolus stable isotope labeling (2012) · cites this paper as [53]

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Authors
Patterson, B. W., Mittendorfer, B., Elias, N., Satyanarayana, R., & Klein, S.
Affiliations
Washington University in St. Louis (US)
Corresponding author
Patterson, Bruce W.
Venue
Journal of Lipid Research
Publisher
Elsevier BV
Published
2002-02
Volume
43
Issue
2
Pages
223-233
ISSN
0022-2275 (ISSN-L)
OpenAlex
W2253903755
Cited by
118
References
45
Citations by year
2025: 1 · 2024: 2 · 2022: 3 · 2020: 4 · 2019: 2 · 2018: 1 · 2017: 1 · 2016: 1 · 2015: 4 · 2014: 4 · 2013: 11 · 2012: 15
FWCI
5.70
Type
journal article
Language
en
Open access
Locations
  • Journal of Lipid Research (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Institutes of Health (5r01ca062177-05, 5p41rr000954-34, RR‐00036, DK56341)
  • National Cancer Institute (CA62177)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK37948, DK56341, R01DK037948, P30DK056341)
  • National Center for Research Resources (RR 00954, RR.00036)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
Keywords
VLDL, triglyceride turnover, stable isotope tracers, fractional catabolic rate, compartmental modeling, non-compartmental analysis, bolus injection, continuous infusion, normolipidemic subjects
MeSH terms
Adult, Carbon Isotopes, Deuterium, Female, Glycerol, Humans, Infusions, Intravenous, Isotope Labeling, Kinetics, Lipoproteins, VLDL, Male, Palmitates, Triglycerides

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