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Critical Reviews™ in Immunology
IF: 1.352 5-Year IF: 3.347 SJR: 0.657 SNIP: 0.55 CiteScore™: 2.19

ISSN Print: 1040-8401
ISSN Online: 2162-6472

Critical Reviews™ in Immunology

DOI: 10.1615/CritRevImmunol.2018026483
pages 333-342

How Oxidized Low-Density Lipoprotein Activates Inflammatory Responses

Jillian P. Rhoads
Department of Medicine, Division of Rheumatology, Vanderbilt Medical Center, Nashville, TN 37232
Amy S. Major
Department of Medicine, Division of Rheumatology, Vanderbilt Medical Center, Nashville, TN 37232; Tennessee Valley Healthcare System, U.S. Department of Veterans Affairs, Nashville, TN 37212

ABSTRACT

Cardiovascular disease (CVD) is the number one cause of death in the United States and worldwide. The most common cause of cardiovascular disease is atherosclerosis, or formation of fatty plaques in the arteries. Low-density lipoprotein (LDL), termed "bad cholesterol", is a large molecule comprised of many proteins as well as lipids including cholesterol, phospholipids, and triglycerides. Circulating levels of LDL are directly associated with atherosclerosis disease severity. Once thought to simply be caused by passive retention of LDL in the vasculature, atherosclerosis studies over the past 40–50 years have uncovered a much more complex mechanism. It has now become well established that within the vasculature, LDL can undergo many different types of oxidative modifications such as esterification and lipid peroxidation. The resulting oxidized LDL (oxLDL) has been found to have antigenic potential and contribute heavily to atherosclerosis associated inflammation, activating both innate and adaptive immunity. This review discusses the many proposed mechanisms by which oxidized LDL modulates inflammatory responses and how this might modulate atherosclerosis.


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