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The clinical significance of serum high density lipoproteins

J J Frohlich1, P H Pritchard

  • 1Department of Pathology, University of British Columbia, Vancouver, Canada.

Clinical Biochemistry
|December 1, 1989
PubMed

Insights

High-density lipoprotein cholesterol (HDL-C) is a key protective factor against atherosclerosis and coronary artery disease (CAD). Monitoring HDL-C is crucial for assessing cardiovascular risk, even with normal cholesterol levels.

Area of Science:

  • Cardiovascular Medicine
  • Lipid Metabolism
  • Preventive Cardiology

Background:

  • Serum high-density lipoproteins (HDL) are recognized as a protective factor against atherosclerosis.
  • Epidemiological studies consistently demonstrate a strong inverse relationship between serum HDL-cholesterol (HDL-C) and the incidence of coronary artery disease (CAD).
  • HDL-C levels are considered a more potent predictor of CAD risk than total cholesterol or low-density lipoprotein cholesterol (LDL-C).

Purpose of the Study:

  • To highlight the significance of HDL-C in cardiovascular risk assessment.
  • To emphasize the role of HDL-C in the primary and secondary prevention of atherosclerosis.
  • To discuss the implications of HDL-C levels in individuals with a history of premature atherosclerosis.

Main Methods:

  • Review of epidemiological studies and clinical data on HDL-C and CAD.
  • Analysis of factors influencing HDL-C levels.
  • Evaluation of therapeutic strategies for managing low HDL-C.

Main Results:

  • High HDL-C levels are associated with a reduced likelihood of CAD, irrespective of total or LDL-C levels.
  • Low HDL-C levels increase cardiovascular risk, even within desirable ranges of total and LDL-C.
  • Increasing HDL-C levels are linked to improved outcomes in atherosclerosis prevention.

Conclusions:

  • HDL-C testing is recommended for individuals with a personal or family history of premature atherosclerosis, even with normal total cholesterol.
  • Current limitations in HDL-C assay accuracy and precision hinder its definitive role in lipid risk assessment.
  • Common causes of low HDL-C include smoking, obesity, and hypertriglyceridemia; treatment involves lifestyle modification and pharmacotherapy (e.g., gemfibrozil, niacin).

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