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Updated: Apr 19, 2026

Quantitative Analysis of Cellular Composition in Advanced Atherosclerotic Lesions of Smooth Muscle Cell Lineage-Tracing Mice
Published on: February 20, 2019
[ABCG1 transporter gene expression in peripheral blood mononuclear cells of patients with atherosclerosis]
Insights
Reduced ABCG1 gene expression in macrophages is linked to atherosclerosis. Lower ABCG1 mRNA levels in monocytes correlate with artery occlusion, indicating ABCG1
Area of Science:
- Cardiovascular Biology
- Molecular Medicine
- Atherosclerosis Research
Background:
- Macrophage cholesterol accumulation is central to atherosclerosis.
- ABCG1 transporter facilitates cholesterol efflux to HDL, impacting foam cell formation.
Purpose of the Study:
- Investigate the role of ABCG1 in human atherosclerosis development.
- Examine ABCG1 gene expression in atherosclerosis patients versus controls.
Main Methods:
- Real-time PCR and Western blotting to quantify ABCG1 mRNA and protein.
- Analysis of gene expression in leukocytes, monocytes, and macrophages.
Main Results:
- Monocyte ABCG1 mRNA inversely correlated with artery occlusion rate (r = -0.45, P = 0.016).
- Significantly reduced ABCG1 mRNA and protein in macrophages of coronary artery stenosis patients.
- Lower monocyte ABCG1 mRNA in patients with 100% artery occlusion.
Conclusions:
- Decreased ABCG1 gene expression in macrophages is associated with atherosclerosis.
- ABCG1 plays a significant role in the pathogenesis of atherosclerosis.
Abstract:
Accumulation of cholesterol in arterial wall macrophages is a main hallmark of atherosclerosis. The ABCG1 transporter mediates cholesterol efflux to high density lipoproteins (HDL) and plays an important role in macrophage foam cell formation. The goal of our study was to investigate the potential role of ABCG1 in atherosclerosis development in humans. ABCG1 gene expression has been examined in leukocytes, monocytes and monocyte-derived macrophages of patients with atherosclerosis and in the control group. Real time PCR and Western blotting were used to determine ABCG1 mRNA and ABCG1 protein levels. Monocyte ABCG1 mRNA level was inversely correlated with the rate of artery occlusion (r = -0.45, P = 0.016). Patients with 100% artery occlusions had decreased monocyte ABCG1 mRNA levels compared to patients who had smaller plaques and controls (P < 0.05). ABCG1 mRNA (P < 0.001) and ABCG1 protein (P < 0.05) levels in macrophages of patients with coronary artery stenosis were significantly reduced compared to the control group. No significant correlation between the ABCG1 gene expression in mononuclear cells and HDL cholesterol concentration has been found. Our study suggests that decrease in the ABCG1 gene expression in macrophages is associated with atherosclerosis.
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