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Plasma lipid transfer proteins

¹Department of Medicine, Columbia University, New York, New York 10032, USA.

Annual Review of Biochemistry

|January 1, 1995

Summary

This summary is machine-generated.

Cholesteryl ester transfer protein (CETP) facilitates lipid exchange between lipoproteins, playing a key role in reverse cholesterol transport. Despite lowering HDL, CETP exhibits anti-atherogenic effects by moving cholesterol to the liver.

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Area of Science:

Biochemistry
Molecular Biology
Cardiovascular Research

Background:

Plasma lipid transfer proteins facilitate the exchange of phospholipids and neutral lipids among lipoproteins.
Cholesteryl ester transfer protein (CETP) and phospholipid transfer protein (PLTP) belong to the lipid transfer/lipopolysaccharide binding gene family.
CETP possesses binding sites for cholesteryl esters and triglycerides, operating via a carrier-mediated mechanism.

Purpose of the Study:

To elucidate the role of Cholesteryl Ester Transfer Protein (CETP) in lipid metabolism and reverse cholesterol transport.
To understand the impact of CETP on High-Density Lipoprotein (HDL) metabolism.
To investigate the relationship between CETP activity and atherosclerosis.

Main Methods:

Analysis of CETP's molecular structure and function, including its binding sites.

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Investigation of CETP's role in the catabolism of HDL cholesteryl esters.

Examination of CETP gene expression regulation in response to dietary cholesterol and hypercholesterolemia.

Main Results:

CETP mediates the catabolism of HDL cholesteryl esters, leading to reduced HDL size and protein content.
CETP is central to reverse cholesterol transport, facilitating cholesterol movement from the periphery to the liver.
CETP gene expression increases with elevated dietary cholesterol or endogenous hypercholesterolemia.

Conclusions:

CETP plays a critical role in the dynamic exchange of lipids within plasma lipoproteins.
Despite reducing HDL levels, CETP's function in reverse cholesterol transport suggests a protective effect against atherosclerosis.
Understanding CETP's mechanisms is crucial for developing strategies to manage cardiovascular disease.