Biomaterial Database

Role of apolipoprotein CIII in triglyceride-rich lipoprotein metabolism. 1998

A Fredenrich

Service d'Endocrinologie-Reproduction-Diabétologie-Lipidologie, CHU de Nice, France.

Apolipoprotein CIII (ApoCIII) appears to play a key role in triglyceride-rich lipoprotein (TRL) metabolism. This 8.8 kDa polypeptide is mainly synthesized by the liver in 3 isoforms. The gene involved has been mapped on chromosome 11, and several polymorphisms associated with hypertriglyceridaemia and/or coronary artery disease (CAD) have been described. In normolipidaemic individuals, the total plasma ApoCIII level (0.10 g/l) is mainly HDL-linked. Plasma levels are increased in hyper-triglyceridaemic subjects in whom ApoCIII is VLDL-linked. In Type 2 diabetic patients, the ApoCIII concentration varies with metabolic control of the disease but does not always correlate with the triglyceride level. In various clinical studies, the level of VLDL/LDL-linked ApoCIII was correlated with the severity of the CAD score, and treatment with fibrates decreased the ApoCIII mRNA level in association with PPAR activation. Overexpression of the human ApoCIII gene in transgenic animals results in hypertriglyceridaemia, which can be corrected by overexpression of the ApoE gene. ApoCIII decreases TRL catabolism by inhibiting lipoprotein lipase activity and reducing ApoE-dependent hepatic uptake of TRL and remnants. There appears to be an interaction between ApoCIII and ApoE at the surface of the lipoprotein. Our recent study of ApoCIII levels in TRL and intermediate-density lipoprotein isolated from hyperlipidaemic Type III and IV individuals confirmed the importance of the ApoCIII/ApoE ratio in these lipoproteins.

UI	MeSH Term	Description	Entries
D008074	Lipoproteins	Lipid-protein complexes involved in the transportation and metabolism of lipids in the body. They are spherical particles consisting of a hydrophobic core of TRIGLYCERIDES and CHOLESTEROL ESTERS surrounded by a layer of hydrophilic free CHOLESTEROL; PHOSPHOLIPIDS; and APOLIPOPROTEINS. Lipoproteins are classified by their varying buoyant density and sizes.	Circulating Lipoproteins,Lipoprotein,Lipoproteins, Circulating
D011237	Predictive Value of Tests	In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test.	Negative Predictive Value,Positive Predictive Value,Predictive Value Of Test,Predictive Values Of Tests,Negative Predictive Values,Positive Predictive Values,Predictive Value, Negative,Predictive Value, Positive
D002874	Chromosome Mapping	Any method used for determining the location of and relative distances between genes on a chromosome.	Gene Mapping,Linkage Mapping,Genome Mapping,Chromosome Mappings,Gene Mappings,Genome Mappings,Linkage Mappings,Mapping, Chromosome,Mapping, Gene,Mapping, Genome,Mapping, Linkage,Mappings, Chromosome,Mappings, Gene,Mappings, Genome,Mappings, Linkage
D002880	Chromosomes, Human, Pair 11	A specific pair of GROUP C CHROMOSOMES of the human chromosome classification.	Chromosome 11
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000960	Hypolipidemic Agents	Substances that lower the levels of certain LIPIDS in the BLOOD. They are used to treat HYPERLIPIDEMIAS.	Antihyperlipidemic,Antilipemic,Antilipemic Agents,Antilipemic Drug,Hypolipidemic Agent,Hypolipidemic Drug,Antihyperlipemics,Antihyperlipidemics,Antilipemic Drugs,Antilipemics,Hypolipidemic Drugs,Agent, Hypolipidemic,Agents, Antilipemic,Agents, Hypolipidemic,Drug, Antilipemic,Drug, Hypolipidemic,Drugs, Antilipemic,Drugs, Hypolipidemic
D001056	Apolipoproteins C	A group of apolipoproteins that can readily exchange among the various classes of lipoproteins (HDL; VLDL; CHYLOMICRONS). After lipolysis of TRIGLYCERIDES on VLDL and chylomicrons, Apo-C proteins are normally transferred to HDL. The subtypes can modulate remnant binding to receptors, LECITHIN CHOLESTEROL ACYLTRANSFERASE, or LIPOPROTEIN LIPASE.	Apo-C,Apo C,ApoC,Apoprotein (C),Apoproteins C
D012307	Risk Factors	An aspect of personal behavior or lifestyle, environmental exposure, inborn or inherited characteristic, which, based on epidemiological evidence, is known to be associated with a health-related condition considered important to prevent.	Health Correlates,Risk Factor Scores,Risk Scores,Social Risk Factors,Population at Risk,Populations at Risk,Correlates, Health,Factor, Risk,Factor, Social Risk,Factors, Social Risk,Risk Factor,Risk Factor Score,Risk Factor, Social,Risk Factors, Social,Risk Score,Score, Risk,Score, Risk Factor,Social Risk Factor
D014280	Triglycerides	An ester formed from GLYCEROL and three fatty acid groups.	Triacylglycerol,Triacylglycerols,Triglyceride
D053305	Apolipoprotein C-III	A 9-kDa protein component of VERY-LOW-DENSITY LIPOPROTEINS and CHYLOMICRON REMNANTS. Apo C-III, synthesized in the liver, is an inhibitor of LIPOPROTEIN LIPASE. Apo C-III modulates the binding of chylomicron remnants and VLDL to receptors (RECEPTORS, LDL) thus decreases the uptake of triglyceride-rich particles by the liver cells and subsequent degradation. The normal Apo C-III is glycosylated. There are several polymorphic forms with varying amounts of SIALIC ACID (Apo C-III-0, Apo C-III-1, and Apo C-III-2).	Apo C-III,Apo C-III-2,ApoC-III,Apolipoprotein C-III-0,Apolipoprotein C-III-1,Apolipoprotein CIII,Sialyl Apo C-III,Sialyl Apolipoprotein C-III,Apo C III,Apo C III 2,Apo C-III, Sialyl,ApoC III,Apolipoprotein C III,Apolipoprotein C III 0,Apolipoprotein C III 1,Apolipoprotein C-III, Sialyl,Sialyl Apo C III,Sialyl Apolipoprotein C III