Effect of low-dose aspirin on vascular inflammation, plaque stability, and atherogenesis in low-density lipoprotein receptor-deficient mice

Tillmann Cyrus ¹, Syuan Sung , Lei Zhao

⁰Center for Experimental Therapeutics and Department of Pharmacology, University of Pennsylvania, School of Medicine, Philadelphia 19104, USA.

Circulation +

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September 5, 2002

View abstract on PubMed

Summary

Low-dose aspirin significantly reduces vascular inflammation and improves atherosclerotic plaque stability in mice. This study suggests aspirin

Area Of Science

Cardiovascular Research
Inflammation Biology
Pharmacology

Background

Atherosclerosis is a chronic inflammatory vascular disease.
Low-dose aspirin is widely used for preventing vascular complications.
The precise mechanisms of aspirin's antiatherogenic effects require further elucidation.

Purpose Of The Study

To investigate the impact of low-dose aspirin on vascular inflammation, plaque composition, and atherogenesis.
To assess aspirin's effects in a mouse model of atherosclerosis (LDL receptor-deficient mice on a high-fat diet).

Main Methods

Utilized LDL receptor-deficient mice fed a high-fat diet.
Administered low-dose aspirin to experimental groups.
Analyzed circulating inflammatory markers, nuclear factor kappaB activity, and aortic plaque composition.

Main Results

Low-dose aspirin decreased key inflammatory markers (sICAM-1, MCP-1, TNF-α, IL-12p40) and NF-κB activity.
Aspirin treatment significantly reduced the overall extent of atherosclerosis.
Aspirin increased smooth muscle cells and collagen, while decreasing macrophages in aortic lesions.

Conclusions

Low-dose aspirin suppresses vascular inflammation and enhances atherosclerotic plaque stability in a murine model.
These effects, combined with antiplatelet activity, contribute to aspirin's antiatherogenic properties.
Findings support further investigation of low-dose aspirin in human atherosclerotic plaque progression.

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