Cited by 36Lipid metabolism and disordersLipid metabolism and biosynthesisClinical Nutrition and Gastroenterology

Glucose and GLP-2 (Glucagon-Like Peptide-2) mobilize intestinal triglyceride by distinct mechanisms

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Stahel, Priska, Xiao, Changting, Davis, Xenia, Tso, Patrick, Lewis, Gary F.·2019·Arteriosclerosis, Thrombosis, and Vascular Biology

Abstract

Objective: Dietary triglycerides are partially retained in the intestine within intracellular or extracellular compartments, which can be rapidly mobilized in response to several stimuli, including glucose and GLP-2 (glucagon-like peptide-2). To elucidate the mechanism of intestinal lipid mobilization, this study examined the patterns and time course of lymph flow and triglycerides after glucose and GLP-2 treatment in rats. Approach and Results: Lymph flow, triglyceride concentration, and triglyceride output were assessed in mesenteric lymph duct-cannulated rats in response to an intraduodenal (i.d.) lipid bolus followed 5 hours later by either (1) i.d. saline+intraperitoneal (i.p.) saline (placebo), (2) i.d. glucose plus i.p. saline, (3) i.d. saline+i.p. GLP-2, or (4) i.d. glucose+i.p. GLP-2. GLP-2 and glucose administered alone or in combination stimulated total triglyceride output to a similar extent, but the timing and pattern of stimulation differed markedly. Whereas GLP-2 rapidly increased lymph flow with no effect on lymph triglyceride concentration or triglyceride:apoB48 (apolipoprotein B48) ratio (a surrogate marker of chylomicron size) compared with placebo, glucose transiently decreased lymph flow followed by delayed stimulation of lymph flow and increased lymph triglyceride concentration and triglyceride:apoB48 ratio. Conclusions: Glucose and GLP-2 robustly enhanced intestinal triglyceride output in rats but with different effects on lymph flow, lymph triglyceride concentration, and chylomicron size. GLP-2 stimulated triglyceride output primarily by enhancing lymph flow with no effect on chylomicron size, whereas glucose mobilized intestinal triglycerides, stimulating secretion of larger chylomicrons. This suggests that these 2 stimuli mobilize intestinal lipid by different mechanisms.

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Authors
Stahel, P., Xiao, C., Davis, X., Tso, P., & Lewis, G. F.
Affiliations
  • University of Toronto (CA)
  • University of Cincinnati (US)
Corresponding author
Lewis, Gary F.
Venue
Arteriosclerosis, Thrombosis, and Vascular Biology
Published
2019-08
Volume
39
Issue
8
Pages
1565-1573
ISSN
  • 1079-5642 (ISSN-L)
  • 1524-4636
OpenAlex
W2960838833
Cited by
36
References
39
Citations by year
2026: 3 · 2025: 4 · 2024: 5 · 2023: 4 · 2022: 11 · 2021: 6 · 2020: 3
FWCI
3.61
Type
journal article
Language
en
Open access
Locations
  • Arteriosclerosis Thrombosis and Vascular Biology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (U2CDK059630, R01DK119135, U24DK059630)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
  • Health Sciences › Nursing › Nutrition and Dietetics › Clinical Nutrition and Gastroenterology
Keywords
glucagon-like peptide-2, glucose, lymph flow, apolipoprotein B-48, dietary triglycerides
MeSH terms
Animals, Chylomicrons, Glucose, Intestinal Mucosa, Lymph, Male, Triglycerides, Rats, Sprague-Dawley, Rats, Apolipoprotein B-48, Glucagon-Like Peptide 2

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