HDL and atherosclerosis: Insights from inherited HDL disorders

Area of Science:

• Cardiovascular Science
• Lipid Metabolism
• Genetics

Background:

• Plasma high-density lipoproteins (HDL) are heterogeneous particles linked to atherosclerotic cardiovascular disease risk.
• HDL's primary atheroprotective function is reverse cholesterol transport, removing cholesterol from macrophages.
• HDLs also support endothelial homeostasis and possess antioxidant properties.

Purpose of the Study:

• To investigate the functional differences among HDL subclasses.
• To understand the relationship between HDL concentration, subclass distribution, and atheroprotection.
• To leverage inherited HDL disorders as a model for studying HDL function.

Main Methods:

• Analysis of HDL heterogeneity (density, size, composition).
• Epidemiological correlation studies of HDL levels and cardiovascular disease.
• Examination of rare monogenic HDL disorders with abnormal HDL subclass distribution.

Main Results:

• HDL levels inversely correlate with atherosclerotic cardiovascular disease.
• Individual HDL subclasses may possess distinct functional properties.
• Inherited HDL disorders exhibit altered HDL subclass profiles and offer insights into HDL-mediated atheroprotection.

Conclusions:

• Understanding HDL subclass function is crucial for defining the 'good' HDL particle.
• Inherited HDL disorders provide a unique window into HDL's role in preventing cardiovascular disease.
• Further research into HDL subclasses can refine strategies for cardiovascular risk reduction.