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How does inflammation affect cholesterol levels? 


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Inflammation has a significant impact on cholesterol levels. Chronic inflammatory diseases and infections are associated with an increased risk of cardiovascular disease, and patients with these disorders often have alterations in lipid metabolism, including decreases in serum HDL and increases in triglycerides . Inflammation also affects lipoprotein function, making LDL more easily oxidized and impairing the reverse cholesterol transport pathway . Inflammation disrupts cholesterol homeostasis, increasing vulnerability to cholesterol accumulation in cells of the artery wall . Acute lipopolysaccharide-induced inflammation reduces plasma total cholesterol, LDL cholesterol, and cholesterol efflux capacity, while increasing triglycerides . Inflammation accelerates the accumulation of cholesterol within arterial cells, exacerbating cholesterol deposition in the vessel wall . Overall, inflammation leads to changes in lipid levels and lipoprotein function, contributing to the development and progression of atherosclerosis.

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Inflammation accelerates the accumulation of cholesterol within arterial smooth muscle cells, macrophages, and other immune cells, leading to increased cholesterol levels in the vessel wall.
Inflammation reduces endogenous cholesterol synthesis and bile acid formation, leading to lower plasma total cholesterol and LDL cholesterol concentrations.
The paper discusses how inflammation associated with systemic lupus erythematosus disrupts cholesterol homeostasis, leading to increased vulnerability to cholesterol accumulation in cells of the artery wall.
Inflammation can decrease HDL levels and increase triglyceride levels, but the mechanisms for these changes are uncertain. LDL levels may also be decreased, but the prevalence of small dense LDL is increased.
Inflammation impairs reverse cholesterol transport (RCT) at multiple steps, including macrophage efflux, HDL acceptor function, and cholesterol elimination through the liver to bile and feces.

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What are the cellular mechanisms involved in lipid oxidation during inflammation?5 answersCellular mechanisms involved in lipid oxidation during inflammation encompass the generation of various oxidized phospholipids (OxPLs) such as 4-hydroxy-trans-2-nonenal (HNE), acrolein, and malondialdehyde (MDA). Enzymatically-oxidized phospholipids (eoxPL) like HETE-PC and HETE-PE are formed by lipoxygenases/cyclooxygenases and the Lands pathway, influencing innate immunity and inflammation. Oxidation of cellular membranes by reactive oxygen species leads to the formation of distinct OxPLs, playing a crucial role in initiating and mediating inflammation in cardiovascular and autoimmune diseases. Oxidatively modified phospholipids generate a diverse array of OxPL species, actively influencing biological processes and contributing to inflammation induction and resolution. Oxidized phospholipids, both enzymatically and non-enzymatically generated, modulate cellular activities through receptor-mediated pathways, affecting apoptosis, immune responses, and other cellular functions.
What are the different lipid classes involved in inflammation?4 answersLipids play a crucial role in inflammation, and several lipid classes have been identified to be involved in this process. These lipid classes include eicosanoids, specialized pro-resolving mediators, lysoglycerophospholipids, sphingolipids, and endocannabinoids. Eicosanoids, such as prostaglandins, thromboxanes, and leukotrienes, are derived from polyunsaturated fatty acids (PUFAs) and have both pro-inflammatory and anti-inflammatory effects. Specialized pro-resolving mediators are another class of lipid mediators that participate in the resolution of inflammation. Lysoglycerophospholipids, sphingolipids, and endocannabinoids also contribute to the regulation of immune responses and inflammatory processes. Sphingolipids, in particular, have been extensively studied and have been implicated in various inflammatory diseases. Overall, these different lipid classes have distinct roles in inflammation and are important targets for understanding and treating inflammatory diseases.
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