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Murine Precision-Cut Liver Slices as an Ex Vivo Model of Liver Biology
Published on: March 14, 2020
Liver x receptor: a novel therapeutic target
M B Patel1, N A Oza, I S Anand
1Department of Pharmacology, Shri Sarvajanik Pharmacy College, Near Arvind Baug, Mehsana - 384 001, India.
Indian Journal of Pharmaceutical Sciences
|January 5, 2010
Summary
Liver X receptors (LXRs) are crucial for cholesterol balance and impact lipid, carbohydrate, and immune functions. Activated by oxysterols, LXRs regulate gene transcription via heterodimers with retinoid X receptors.
Area of Science:
- Molecular Biology
- Endocrinology
- Cell Biology
Background:
- Liver X receptors (LXRs) are orphan nuclear receptors vital for cholesterol homeostasis.
- Initially recognized for their role in reverse cholesterol transport, LXRs also influence broader metabolic and immune pathways.
- Two paralogs, LXR-alpha and LXR-beta, exhibit distinct tissue expression patterns.
Purpose of the Study:
- To elucidate the multifaceted roles of liver X receptors (LXRs) beyond cholesterol metabolism.
- To detail the ligand activation and heterodimerization mechanisms of LXRs.
- To highlight the differential tissue distribution of LXR-alpha and LXR-beta.
Main Methods:
- Literature review and synthesis of existing research findings.
- Analysis of gene expression and protein-protein interaction data related to LXRs.
- Comparative analysis of LXR-alpha and LXR-beta tissue distribution.
Main Results:
- LXRs regulate not only cholesterol homeostasis but also lipid and carbohydrate metabolism, cellular differentiation, apoptosis, and immune responses.
- Endogenous ligands for LXRs are oxysterols, oxidized cholesterol derivatives.
- Activated LXRs form heterodimers with retinoid X receptors (RXRs) to modulate target gene transcription.
Conclusions:
- Liver X receptors play a central and diverse role in metabolic regulation and cellular processes.
- Understanding LXR function is critical for targeting metabolic and inflammatory diseases.
- The distinct expression profiles of LXR paralogs suggest specialized functions in different tissues.
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