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Liver X receptor modulators: a review of recently patented compounds (2007 - 2009)
Xiaolin Li1, Vince Yeh, Valentina Molteni
1Genomics Institute of the Novartis Research Foundation, Department of Medicinal Chemistry, San Diego, CA 92121, USA.
Importance Of The Field:
Liver X receptors (LXRs) are ligand activated transcription factors involved in cholesterol metabolism, glucose homeostasis, inflammation and lipogenesis. With the important physiological role of LXRs in reverse cholesterol transport (RCT), atherosclerosis is the best investigated therapeutic indication. While atherosclerosis is not yet clinically validated, Wyeth's LXRalpha/beta agonist LXR-623 indicated the key LXR target genes involved in RCT (ABCA1 and ABCG1) are upregulated in peripheral blood cells in a dose-dependent manner. While discontinued for CNS safety concerns, investigation of LXR-623 supports atherosclerosis as a clinical indication, and the possibility of identifying LXR agonists with profiles that avoid the strong lipogenic effects of full LXRalpha/beta agonists.
Areas Covered In This Review:
Patents for LXR agonists from late 2006 up to August 2009 with emphasis on chemical matters and relationship to earlier disclosures, the biological data associated with selected analogues and therapeutic indications.
What The Reader Will Gain:
An overview of the majority of LXR scaffolds with representative structure activity relationships as well as the companies that are the chief players in the field.
Take Home Message:
The future application of LXR agonists depends upon the discovery of LXR agents without lipogenic effects. Limiting activation of LXRalpha is a popular strategy.
Insights
Liver X receptor (LXR) agonists show promise for atherosclerosis treatment by upregulating cholesterol transport genes. Future LXR agonists must avoid lipogenic effects, with selective LXRalpha activation being a key strategy.
Area of Science:
- Molecular biology and pharmacology
- Cardiovascular research
- Drug discovery
Background:
- Liver X receptors (LXRs) regulate cholesterol metabolism, glucose homeostasis, and inflammation.
- LXRs play a crucial role in reverse cholesterol transport (RCT), making them a target for atherosclerosis treatment.
- Previous LXR agonists demonstrated target engagement but raised safety concerns regarding lipogenesis.
Purpose of the Study:
- To review patents and biological data of LXR agonists from 2006-2009.
- To analyze structure-activity relationships and identify key players in LXR agonist development.
- To explore therapeutic indications for LXR agonists, particularly in atherosclerosis.
Main Methods:
- Comprehensive patent analysis of LXR agonists (late 2006-August 2009).
- Review of chemical properties and biological data of selected LXR analogues.
- Examination of therapeutic applications and structure-activity relationships.
Main Results:
- Overview of major LXR scaffolds and their structure-activity relationships.
- Identification of key companies involved in LXR agonist research.
- Demonstration of LXR target gene upregulation (ABCA1, ABCG1) by an LXR agonist in vitro.
Conclusions:
- The clinical success of LXR agonists hinges on developing agents that lack lipogenic side effects.
- Selective activation of LXRalpha is a promising strategy to achieve therapeutic benefits while minimizing adverse effects.
- Further research is needed to identify safe and effective LXR agonists for treating metabolic and cardiovascular diseases.
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