Properties of triglyceride-rich and cholesterol-rich lipoproteins in the remnant-like particle fraction of human blood plasma

Elisa Campos; Leila Kotite; Patricia Blanche; Yasushi Mitsugi; Philip H. Frost; Umesh Masharani; Ronald M. Krauss; Richard J. Havel

Journal of Lipid Research (Mar 2002)

Properties of triglyceride-rich and cholesterol-rich lipoproteins in the remnant-like particle fraction of human blood plasma

Elisa Campos,
Leila Kotite,
Patricia Blanche,
Yasushi Mitsugi,
Philip H. Frost,
Umesh Masharani,
Ronald M. Krauss,
Richard J. Havel

Affiliations

Elisa Campos: Cardiovascular Research Institute, University of California San Francisco, 505 Parnassus Avenue, Rm L-1337, San Francisco, CA
Leila Kotite: Cardiovascular Research Institute, University of California San Francisco, 505 Parnassus Avenue, Rm L-1337, San Francisco, CA
Patricia Blanche: Lawrence Berkeley Laboratory, University of California Berkeley, Berkeley, CA
Yasushi Mitsugi: Cardiovascular Research Institute, University of California San Francisco, 505 Parnassus Avenue, Rm L-1337, San Francisco, CA
Philip H. Frost: Department of Medicine, University of California San Francisco, 505 Parnassus Avenue, Rm L-1337, San Francisco, CA
Umesh Masharani: Department of Medicine, University of California San Francisco, 505 Parnassus Avenue, Rm L-1337, San Francisco, CA
Ronald M. Krauss: Lawrence Berkeley Laboratory, University of California Berkeley, Berkeley, CA
Richard J. Havel: Cardiovascular Research Institute, University of California San Francisco, 505 Parnassus Avenue, Rm L-1337, San Francisco, CA; To whom correspondence should be addressed.

Journal volume & issue: Vol. 43, no. 3
pp. 365 – 374

Abstract

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An immunoassay procedure that quantifies remnant-like particle (RLP) cholesterol in human blood plasma has shown considerable promise as a clinically applicable risk marker for atherosclerotic disease. The lipoproteins included in this assay include not only certain TG-rich lipoproteins [all particles containing apolipoprotein B-48 (apoB-48) and a fraction of those containing apoB-100] but also a very small proportion of plasma cholesterol-rich lipoproteins. The TG-rich lipoprotein component of RLP has been partially characterized, but relatively little is known about the component cholesterol-rich lipoproteins. We have further characterized the properties of the TG-rich component that is included in RLP in which about 25% of the particles contain apoB-48 and the remainder apoB-100. We show that the cholesterol-rich component is comprised mainly of β-migrating LDLs that contain predominantly apoB-100. ApoE found in the LDL fraction of RLP resides on pre-β lipoproteins that lack apoA-I as well as apoB. The TG-rich component of RLP is responsible for increased RLP-cholesterol concentrations associated with hypertriglyceridemia. By contrast, the cholesterol-rich component is a major contributor to plasma RLP-cholesterol in individuals with low plasma TG. Our results suggest that particle heterogeneity in the RLP fraction is likely to affect the ability of RLP-cholesterol concentration to predict atherosclerotic risk. RLP-cholesterol concentrations in individuals with low plasma TG may not have the same clinical significance as they do in those with hypertriglyceridemia. —Campos, E., L. Kotite, P. Blanche, Y. Mitsugi, P. H. Frost, U. Masharani, R. M. Krauss, and R. J. Havel. Properties of triglyceride-rich and cholesterol-rich lipoproteins in the remnant-like particle fraction of human blood plasma.

Published in Journal of Lipid Research

ISSN: 0022-2275 (Print); 1539-7262 (Online)
Publisher: Elsevier
Country of publisher: United States
LCC subjects: Science: Chemistry: Organic chemistry: Biochemistry
Website: https://www.journals.elsevier.com/journal-of-lipid-research

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