Cited by 46Fatty Acid Research and HealthLipid metabolism and disordersLipid metabolism and biosynthesis

Reduced hepatic triglyceride secretion in rats fed docosahexaenoic acid-rich fish oil suppresses postprandial hypertriglyceridemia

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Ikeda, Ikuo, Kumamaru, Jun, Nakatani, Noriaki, Sakono, Masanobu, Murota, Itsuki, Imaizumi, Katsumi·2001·The Journal of Nutrition

Abstract

To evaluate the mechanisms of suppression of postprandial hypertriglyceridemia by fish oil rich in docosahexaenoic acid, the effect on the intestinal absorption of triglyceride, activities of lipoprotein lipase (LPL) and hepatic triglyceride lipase (HTGL) and metabolism of chylomicrons (CM) and CM remnants were compared with that of safflower oil in Sprague-Dawley rats in a series of studies. The feeding of fish oil for 3 wk suppressed postprandial hypertriglyceridemia (study 1). Dietary fish oil did not alter the rate of lymphatic absorption of triglyceride (study 2). The activities of LPL and HTGL were measured at 5 h after the beginning of feeding, when serum triglyceride concentrations were highest in both dietary groups. The activities of LPL in adipose tissue and heart were greater (P < 0.05) and those of HTGL were lower (P < 0.05) in the rats fed fish oil (study 3). In contrast, there were no differences in the activities of LPL and HTGL in postheparin plasma between the fish and safflower oil groups (study 4). The clearance rates of CM and CM remnants were measured by injecting intravenously CM collected from rats fed safflower or fish oils with [14C]triolein and [3H]cholesterol (study 5). Dietary oil did not influence the half-lives of CM or CM remnants. The secretion of triglyceride from the liver of rats injected with Triton WR-1339 was lower (P < 0.05) in the rats fed docosahexaenoic acid, a major component of fish oil, than those fed linoleic acid, a major component of safflower oil (study 6). These observations strongly support the hypothesis that in rats, the principal cause of the suppression of postprandial hypertriglyceridemia by fish oil is the depression of triglyceride secretion from the liver.

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Authors
Ikeda, I., Kumamaru, J., Nakatani, N., Sakono, M., Murota, I., & Imaizumi, K.
Affiliations
  • Kyushu University (JP)
  • University of Miyazaki (JP)
Corresponding author
Ikeda, Ikuo
Venue
The Journal of Nutrition
Publisher
Elsevier BV
Published
2001-04
Volume
131
Issue
4
Pages
1159-1164
ISSN
0022-3166 (ISSN-L)
OpenAlex
W2098112642
Cited by
46
References
39
Citations by year
2026: 1 · 2024: 2 · 2021: 1 · 2020: 1 · 2018: 4 · 2016: 2 · 2015: 1 · 2014: 5 · 2013: 1 · 2012: 1
FWCI
2.35
Type
journal article
Language
en
Open access
Locations
  • Journal of Nutrition (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Fatty Acid Research and Health
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
Keywords
docosahexaenoic acid, fish oil, safflower oil, postprandial hypertriglyceridemia, hepatic triglyceride secretion, lipoprotein lipase, hepatic lipase, chylomicron clearance, chylomicron remnants, linoleic acid, dietary fatty acids
MeSH terms
Absorption, Animals, Chylomicrons, Docosahexaenoic Acids, Fish Oils, Lipase, Lipoprotein Lipase, Liver, Male, Safflower Oil, Triglycerides, Hypertriglyceridemia, Rats, Sprague-Dawley, Postprandial Period, Linoleic Acid, Rats

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