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Published on: November 17, 2018
Liver X receptors as potential therapeutic targets in atherosclerosis
1Nanjing University School of Medicine, Research Institute of General Surgery, Jinling Hospital, Nanjing, China.
Purpose:
Atherosclerosis is the primary independent risk factor of cardiovascular disease, and Liver X Receptors (LXRalpha and LXRbeta) activation may play an anti-atherosclerosis effect. In this article, we summarize the current state of knowledge of roles of LXRs in physiology and homeostasis as well as the links between LXR action and atherosclerosis, and discuss the potential therapeutic effects of LXR agonists.
Source:
A MEDLINE database search was performed to identify relevant articles using the keywords "liver X receptors", "LXRs", and "atherosclerosis". Additional papers were identified by a manual research of the references from the key articles.
Principle Findings:
Both LXR isoforms promote reverse cholesterol transport (RCT) and have anti-inflammatory activity. LXRalpha is the predominant receptor in the liver regulating triglyceride synthesis. The antiatherosclerotic ability of LXRs makes them attractive targets for drugs for the treatment of cardiovascular disease. However, LXR activation induces lipogenesis and hypertriglyceridemia. The first-generation synthetic ligands of LXR increase hepatic lipogenesis and plasma triglyceride levels. New LXR ligands need to be designed without undesirable side effects.
Conclusion:
LXR beta-selective agonists and LXR modulators, which act as agonists in macrophages and induce cholesterol efflux while as antagonists of lipogenesis in the liver, are two critical and attractive approaches to treat atherosclerosis and cardiovascular diseases.
Insights
Liver X Receptors (LXRs) show anti-atherosclerosis effects by promoting cholesterol transport and reducing inflammation. New LXR modulators are needed to avoid side effects like increased triglycerides.
Area of Science:
- Cardiovascular Science
- Molecular Biology
- Pharmacology
Background:
- Atherosclerosis is a major risk factor for cardiovascular disease.
- Liver X Receptors (LXRs) are implicated in regulating cholesterol homeostasis and inflammation.
- LXR activation presents a potential therapeutic strategy for atherosclerosis.
Purpose of the Study:
- To review the physiological roles of LXRs.
- To examine the link between LXR activity and atherosclerosis.
- To discuss the therapeutic potential of LXR agonists.
Main Methods:
- Comprehensive MEDLINE database search using keywords: "liver X receptors", "LXRs", and "atherosclerosis".
- Manual review of references from identified key articles.
Main Results:
- LXRs (LXRalpha and LXRbeta) promote reverse cholesterol transport and possess anti-inflammatory properties.
- LXRalpha regulates hepatic triglyceride synthesis; LXR activation can induce lipogenesis and hypertriglyceridemia.
- First-generation LXR ligands increase hepatic lipogenesis and plasma triglycerides, necessitating new ligand designs.
Conclusions:
- LXR beta-selective agonists offer a therapeutic avenue.
- LXR modulators acting as agonists in macrophages and antagonists in the liver represent a promising approach to treat atherosclerosis and cardiovascular diseases.
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