Cited by 933Lipid metabolism and biosynthesisAdipokines, Inflammation, and Metabolic DiseasesLipid metabolism and disorders

Splanchnic lipolysis in human obesity

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Nielsen, Soren, Guo, ZengKui, Johnson, C. Michael, Hensrud, Donald D., Jensen, Michael D.·2004·Journal of Clinical Investigation

Abstract

Elevated FFA concentrations have been shown to reproduce some of the metabolic abnormalities of obesity. It has been hypothesized that visceral adipose tissue lipolysis releases excess FFAs into the portal vein, exposing the liver to higher FFA concentrations. We used isotope dilution/hepatic vein catheterization techniques to examine whether intra-abdominal fat contributes a greater portion of hepatic FFA delivery in visceral obesity. Obese women (n = 24) and men (n = 20) with a range of obesity phenotypes, taken together with healthy, lean women (n = 12) and men (n = 12), were studied. Systemic, splanchnic, and leg FFA kinetics were measured. The results showed that plasma FFA concentrations were approximately 20% greater in obese men and obese women. The contribution of splanchnic lipolysis to hepatic FFA delivery ranged from less than 10% to almost 50% and increased as a function of visceral fat in women (r = 0.49, P = 0.002) and in men (r = 0.52, P = 0.002); the slope of the relationship was greater in women than in men (P < 0.05). Leg and splanchnic tissues contributed a greater portion of systemic FFA release in obese men and women than in lean men and women. We conclude that the contribution of visceral adipose tissue lipolysis to hepatic FFA delivery increases with increasing visceral fat in humans and that this effect is greater in women than in men.

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  • The relative contribution of leg adipose tissue lipolysis to systemic FFA is significantly greater in women than in men.

    “The relative contribution of leg adipose tissue lipolysis to systemic FFA is significantly greater in women than men (67, 70)”

    From Sex differences in the metabolism of glucose and fatty acids by adipose tissue and skeletal muscle in humans (2025) · cites this paper as [70]

    In Systemic FFA kinetics (page unavailable), the lower-body contribution to systemic FFA release is numerically higher in lean women than lean men (20% versus 14%), but equal in obese women and men (28% each). The reported P = 0.02 tests differences among groups, not a significant overall difference between women and men, so the claimed significant sex difference is not established. (LLM, conf=0.86)

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  • Visceral adipose tissue accounts for only a small proportion (c. 6%) of whole body lipolysis in lean individuals.

    “Although visceral adipose tissue accounts for only a small proportion (c. 6%) of whole body lipolysis in lean individuals,31 this may explain why chronic glucocorticoid excess causes accumulation of visceral adipose tissue.”

    From Acute physiological effects of glucocorticoids on fuel metabolism in humans are permissive but not direct (2017) · cites this paper as [31]

    The Systemic FFA kinetics section reports that the splanchnic bed accounted for 6% ± 1% of systemic FFA release in lean women and men. This supports the small proportion and approximate figure, but the measured quantity is splanchnic FFA release, not visceral adipose tissue's share of whole-body lipolysis. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • The contribution of visceral fat to hepatic FFA delivery relative to visceral adipose tissue content is greater in women than in men.

    “However, the contribution of visceral fat to hepatic FFA delivery relative to visceral adipose tissue content is greater in women than men (70)”
  • The authors pooled data from femoral artery, femoral vein, and hepatic vein catheterization studies to assess variability and sex differences in regional FFA release.

    “We pooled data from femoral artery, femoral vein and hepatic vein catheterization studies that included measures of blood flow, body composition and isotopic tracer techniques to assess the variability and sex-differences regional FFA release (33, 65–70).”
  • There is no significant difference between women and men in the relative contribution of splanchnic and upper body subcutaneous adipose tissue to systemic FFA release under overnight postabsorptive conditions.

    “but there appears to be no significant difference between women and men in the relative contribution of splanchnic and upper body subcutaneous adipose tissue to systemic FFA release under overnight, postabsorptive conditions (70).”

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Authors
Nielsen, S., Guo, Z., Johnson, C. M., Hensrud, D. D., & Jensen, M. D.
Affiliations
Mayo Clinic (US)
Corresponding author
Jensen, Michael D.
Venue
Journal of Clinical Investigation
Published
2004-06-01
Volume
113
Issue
11
Pages
1582-1588
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2010895111
Cited by
933
References
40
Citations by year
2026: 26 · 2025: 26 · 2024: 37 · 2023: 41 · 2022: 41 · 2021: 49 · 2020: 47 · 2019: 33 · 2018: 39 · 2017: 48 · 2016: 37 · 2015: 37 · 2014: 52 · 2013: 54 · 2012: 49
FWCI
16.31
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Mayo Clinic
  • Mayo Foundation for Medical Education and Research
  • Deutsches Krebsforschungszentrum
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK 40484, P30DK050456, DK 45343, DK50456, R37DK040484, R01DK045343, R01DK040484)
  • National Center for Research Resources (RR 0585, M01RR000585)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
Keywords
visceral adipose tissue, free fatty acids, obesity, visceral fat, sex differences, hepatic vein catheterization, isotope dilution, portal vein
MeSH terms
Abdomen, Adult, Female, Humans, Kinetics, Leg, Male, Obesity, Body Mass Index, Lipid Metabolism

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