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Published on: March 24, 2015
Biological roles of liver X receptors in immune cells
Mónica Pascual-García1, Annabel F Valledor
1Nuclear Receptor Group, Department of Physiology and Immunology, School of Biology, University of Barcelona, Spain.
Abstract:
Liver X receptors (LXRs) are members of the nuclear receptor superfamily that are activated by specific oxysterols. LXRs heterodimerize with retinoid X receptors to regulate positively the expression of a variety of target genes, many of which are involved in lipid and glucose metabolism. In the last few years, new targets of LXR activation have been identified with roles in the modulation of immune responses. Moreover, LXRs mediate repression of inflammatory pathways through mechanisms collectively known as transrepression. Here, we revise recent findings on the impact of LXR activation on immune responses, with an emphasis on advances in the understanding of the molecular mechanisms that mediate these effects.
Insights
Liver X receptors (LXRs) regulate lipid and glucose metabolism and modulate immune responses. Recent research reveals new LXR targets impacting immunity and their anti-inflammatory transrepression mechanisms.
Area of Science:
- Molecular Biology
- Immunology
- Endocrinology
Background:
- Liver X receptors (LXRs) are nuclear receptors activated by oxysterols.
- LXRs form heterodimers with retinoid X receptors (RXRs).
- LXR/RXR complexes regulate genes involved in lipid and glucose metabolism.
Purpose of the Study:
- To review recent findings on LXR activation's impact on immune responses.
- To emphasize advances in understanding LXR-mediated molecular mechanisms in immunity.
- To explore LXR's role in immune modulation and inflammation control.
Main Methods:
- Literature review of recent studies on LXR and immune responses.
- Analysis of molecular mechanisms of LXR transrepression.
- Synthesis of current knowledge on LXR targets in immunity.
Main Results:
- LXR activation influences diverse immune cell functions.
- New LXR target genes with roles in immune modulation have been identified.
- LXRs exert anti-inflammatory effects via transrepression pathways.
Conclusions:
- LXR activation plays a significant role in modulating immune responses.
- Understanding LXR's molecular mechanisms provides insights into treating inflammatory diseases.
- Further research into LXR targets can reveal novel therapeutic strategies for immune-related disorders.
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