What question did this study set out to answer?

To determine which HDL particle subfractions most efficiently promote cellular cholesterol efflux from foam cell macrophages and identify the cellular transporters mediating this process.

January 15, 2015Circulation ResearchOpen Access

HDL Particle Size Is a Critical Determinant of ABCA1-Mediated Macrophage Cellular Cholesterol Export

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Authors

XDXian-Ming DuScripps Research Institute MKMi‐Jurng KimAdvanced Medical Institute (Australia)LHLiming HouXijing Hospital

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Implication

Laboratory study demonstrates that small, dense HDL subfractions drive ABCA1-mediated cholesterol efflux in macrophages, suggesting therapeutic strategies should target small HDL particles.

Key Points

To determine which HDL particle subfractions most efficiently promote cellular cholesterol efflux from foam cell macrophages and identify the cellular transporters mediating this process.
Evaluated cholesterol export using reconstituted HDL particles of defined size and isolated human plasma HDL subfractions.
Tested mechanistic involvement using stable cell lines and mouse and human macrophages lacking or expressing ABCA1 or ABCG1.
ABCA1 was the primary driver of macrophage cholesterol efflux to HDL, displaying the highest efficiency with small, dense HDL subfractions (HDL3b and HDL3c).
ABCG1 contributed minimally to total cholesterol efflux and had a negligible role in efflux mediated by HDL3b and HDL3c subfractions.

Cite This Study

Du et al. (2015) studied this question.

synapsesocial.com/papers/6a712364f44fa9f079dee8a6 https://doi.org/10.1161/circresaha.116.305485

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Implication

Laboratory study demonstrates that small, dense HDL subfractions drive ABCA1-mediated cholesterol efflux in macrophages, suggesting therapeutic strategies should target small HDL particles.

HDL Particle Size Is a Critical Determinant of ABCA1-Mediated Macrophage Cellular Cholesterol Export

Discussion

Member takes

Implication

Key Points

Cite This Study

HDL Particle Size Is a Critical Determinant of ABCA1-Mediated Macrophage Cellular Cholesterol Export

Discussion

Member takes

Implication

Key Points

Cite This Study

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