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Apolipoprotein E: possible therapeutic target for atherosclerosis
L Bocksch1, T Stephens, A Lucas
1Vascular Biology Group, John P. Robarts Research Institute, London, Ontario, Canada.
Current Drug Targets. Cardiovascular & Haematological Disorders
|May 29, 2003
Summary
Human apolipoprotein E (apoE) plays a crucial role in lipid transport and offers direct arterial protection against atherosclerosis. Its multifaceted functions suggest significant therapeutic potential for treating this vascular disease.
Area of Science:
- Biochemistry
- Vascular Biology
- Immunology
Background:
- Human apolipoprotein E (apoE) is vital for lipid transport.
- Beyond lipid transport, apoE exhibits direct protective effects on the vascular wall against atherosclerosis.
Purpose of the Study:
- To review the multifaceted roles of apoE in vascular protection.
- To explore apoE's therapeutic potential in ameliorating atherosclerosis.
Main Methods:
- Review of scientific literature on apoE functions.
- Analysis of apoE's interactions with cholesterol efflux mechanisms (apoA1, ABC1).
- Examination of apoE's effects on platelet aggregation (nitric oxide production).
- Investigation of apoE's impact on T-lymphocyte and endothelial cell proliferation (IL-2 receptor, HSPG interactions).
Main Results:
- ApoE facilitates cholesterol efflux via apoA1 and ATP binding cassette transporter 1 (ABC1).
- ApoE inhibits platelet aggregation by promoting nitric oxide (NO) production.
- ApoE suppresses T-lymphocyte proliferation by internalizing the IL-2 receptor.
- ApoE limits endothelial cell proliferation by competing for heparan sulfate proteoglycans (HSPG's).
Conclusions:
- ApoE possesses diverse protective functions against atherosclerosis.
- These functions highlight apoE's potential as a therapeutic agent for atherosclerosis treatment.
- Further research into apoE-based strategies could lead to novel atherosclerosis therapies.