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Cholesterol Efflux Assay
07:54

Cholesterol Efflux Assay

Published on: March 6, 2012

The two faces of the 'good' cholesterol

Benjamin J Ansell1

  • 1Atherosclerosis Research Unit, Division of Cardiology, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.

Cleveland Clinic Journal of Medicine
|October 19, 2007
PubMed

Insights

Low high-density lipoprotein (HDL) cholesterol predicts heart disease, but increasing HDL levels may not reduce risk. The function, not just the amount, of HDL may be key to cardiovascular health.

Area of Science:

  • Cardiovascular Science
  • Lipid Metabolism

Background:

  • Low high-density lipoprotein (HDL) cholesterol is a known risk factor for coronary heart disease (CHD).
  • Clinical interventions aimed at increasing HDL cholesterol levels have not consistently translated to reduced cardiovascular risk.
  • This suggests a potential disconnect between HDL cholesterol quantity and its protective function.

Purpose of the Study:

  • To investigate the functional capacity of HDL cholesterol beyond its circulating levels.
  • To explore the paradoxical relationship between HDL cholesterol levels and coronary heart disease risk.
  • To understand how HDL's functional properties influence atherosclerosis.

Main Methods:

  • Analysis of HDL's antioxidant and pro-oxidant activities under various physiological conditions.
  • Assessment of HDL's role in modulating inflammation within atherosclerotic plaques.
  • Correlation of HDL functional assays with markers of cardiovascular risk.

Main Results:

  • HDL cholesterol can exhibit reduced antioxidant capacity under specific conditions.
  • Dysfunctional HDL may actively contribute to oxidation and inflammation in atherosclerotic lesions.
  • HDL's functional state, rather than its concentration, appears critical in cardiovascular disease pathogenesis.

Conclusions:

  • The functional properties of high-density lipoprotein cholesterol are crucial for its cardioprotective effects.
  • Optimizing HDL function, in addition to managing HDL levels, may be a more effective strategy for reducing coronary heart disease risk.
  • Future research should focus on assessing and enhancing HDL's functional capabilities.

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