High density lipoproteins and atherosclerosis: emerging aspects

Area of Science:

• Cardiovascular Biology
• Immunology
• Lipid Metabolism

Background:

• High density lipoproteins (HDL) are key in reverse cholesterol transport, moving excess cholesterol from tissues to the liver for excretion.
• This cholesterol efflux capability is the primary mechanism behind HDL's anti-atherogenic effects.
• HDL also modulates immune cell responses, including those of monocyte-macrophages, B lymphocytes, and T lymphocytes, which are implicated in atherosclerosis.

Purpose of the Study:

• To review the emerging role of high density lipoproteins (HDL) in modulating immune cell activity.
• To discuss the impact of HDL on immune-inflammatory mediators during the development of atherosclerosis.
• To examine how HDL composition changes during inflammation, leading to dysfunctional HDL.

Main Methods:

• Literature review of studies investigating HDL function in immune cells.
• Analysis of research on HDL's interaction with immune-inflammatory pathways in atherosclerosis.
• Examination of studies detailing HDL compositional changes during inflammatory states.

Main Results:

• HDL's cholesterol efflux capacity is central to its anti-atherogenic function.
• HDL influences various immune cell types involved in atherosclerotic processes.
• Inflammation can alter HDL composition, potentially leading to impaired function and promoting atherosclerosis.

Conclusions:

• High density lipoproteins (HDL) play a significant role in regulating immune responses within the context of atherosclerosis.
• Understanding HDL's immunomodulatory functions and its alterations during inflammation is critical for developing new therapeutic strategies against atherosclerosis.