Cited by 424Lipid metabolism and disordersLipoproteins and Cardiovascular HealthCholesterol and Lipid Metabolism

Apolipoprotein B metabolism in subjects with deficiency of apolipoproteins CIII and AI: evidence that apolipoprotein CIII inhibits catabolism of triglyceride-rich lipoproteins by lipoprotein lipase in vivo

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Ginsberg, H N, Le, N A, Goldberg, I J, Gibson, J C, Rubinstein, A, Wang-Iverson, P, Norum, R, Brown, W V·1986·Journal of Clinical Investigation

Abstract

Previous data suggest that apolipoprotein (apo) CIII may inhibit both triglyceride hydrolysis by lipoprotein lipase (LPL) and apo E-mediated uptake of triglyceride-rich lipoproteins by the liver. We studied apo B metabolism in very low density (VLDL), intermediate density (IDL), and low density lipoproteins (LDL) in two sisters with apo CIII-apo AI deficiency. The subjects had reduced levels of VLDL triglyceride, normal LDL cholesterol, and near absence of high density lipoprotein (HDL) cholesterol. Compartmental analysis of the kinetics of apo B metabolism after injection of 125I-VLDL and 131I-LDL revealed fractional catabolic rates (FCR) for VLDL apo B that were six to seven times faster than normal. Simultaneous injection of [3H]glycerol demonstrated rapid catabolism of VLDL triglyceride. VLDL apo B was rapidly and efficiently converted to IDL and LDL. The FCR for LDL apo B was normal. In vitro experiments indicated that, although sera from the apo CIII-apo-AI deficient patients were able to normally activate purified LPL, increasing volumes of these sera did not result in the progressive inhibition of LPL activity demonstrable with normal sera. Addition of purified apo CIII to the deficient sera resulted in 20-50% reductions in maximal LPL activity compared with levels of activity attained with the same volumes of the native, deficient sera. These in vitro studies, together with the in vivo results, indicate that in normal subjects apo CIII can inhibit the catabolism of triglyceride-rich lipoproteins by lipoprotein lipase.

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  1. Lipid Research Clinics Program. 1974. Lipid and Lipoprotein Analysis. Manual of Laboratory Operations. Vol. 1 National Institutes ofHealth, Bethesda, MD. Department ofHealth, Education, and Welfare Publication No. 75-628.

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Authors
Ginsberg, H. N., Le, N. A., Goldberg, I. J., Gibson, J. C., Rubinstein, A., Wang-Iverson, P., Norum, R., & Brown, W. V.
Affiliations
  • Columbia University Irving Medical Center (US)
  • Icahn School of Medicine at Mount Sinai (US)
  • Henry Ford Hospital (US)
Venue
Journal of Clinical Investigation
Published
1986-11-01
Volume
78
Issue
5
Pages
1287-1295
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2057271976
Cited by
424
References
38
Citations by year
2026: 4 · 2025: 5 · 2024: 5 · 2023: 7 · 2022: 11 · 2021: 15 · 2020: 23 · 2019: 9 · 2018: 15 · 2017: 18 · 2016: 12 · 2015: 18 · 2014: 11 · 2013: 14 · 2012: 8
FWCI
4.39
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Heart, Lung, and Blood Institute (HL-23077, HL-00949)
  • National Center for Research Resources (RR 71)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
  • Health Sciences › Medicine › Surgery › Lipoproteins and Cardiovascular Health
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
Keywords
apolipoprotein C-III, apolipoprotein A-I deficiency, lipoprotein lipase inhibition, triglyceride-rich lipoproteins, VLDL, IDL, low-density lipoprotein, fractional catabolic rate, lipoprotein catabolism, lipoprotein lipase activation
MeSH terms
Adult, Apolipoproteins A, Apolipoproteins B, Apolipoproteins C, Cholesterol, Humans, Hypolipoproteinemias, Kinetics, Lipoprotein Lipase, Lipoproteins, LDL, Lipoproteins, VLDL, Models, Biological, Triglycerides, Apolipoprotein A-I, Apolipoprotein C-II

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