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A BW Reporter System for Studying Receptor-Ligand Interactions
Published on: January 7, 2019
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Alternative retinoid X receptor (RXR) ligands
Wojciech Krężel1, Ralph Rühl2, Angel R de Lera3
1Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France; Centre National de la Recherche Scientifique, UMR 7104, Illkirch, France; Institut National de la Santé et de la Recherche Médicale, U 1258, Illkirch, France; Université de Strasbourg, Illkirch, France.
Molecular and Cellular Endocrinology
|April 27, 2019
Summary
Retinoid X receptors (RXRs) regulate diverse functions through dimerization. Novel retinoids, like Vitamin A5, show promise in modulating RXR activity, with conserved direct ligand binding suggesting evolutionary importance.
Area of Science:
- Molecular Biology
- Endocrinology
- Pharmacology
Background:
- Retinoid X receptors (RXRs) are crucial nuclear hormone receptors involved in various signaling pathways.
- RXRs function by forming dimers with other nuclear hormone receptors (NRs).
Purpose of the Study:
- To review known RXR ligands and their roles in modulating specific RXR-dimer transcriptional activity.
- To discuss the physiological relevance and diverse binding modes of RXR ligands, including novel retinoids.
- To explore the evolutionary conservation of RXR ligand binding mechanisms.
Main Methods:
- Literature review of RXR ligands and their associated biological processes.
- Comparative analysis of natural and synthetic RXR ligands.
- Discussion of ligand binding modes, including agonistic and antagonistic profiles.
Main Results:
- RXRs control diverse biological functions through heterodimerization with other nuclear receptors.
- Novel retinoids, potentially Vitamin A5, may represent key endogenous modulators of RXR activity.
- Ligand binding to RXRs exhibits significant diversity, affecting transcriptional modulation and subtype selectivity.
- Direct ligand binding to the RXR ligand-binding pocket for agonistic activity is evolutionarily conserved.
Conclusions:
- RXRs are central regulators of cellular processes, modulated by a variety of ligands.
- The discovery and characterization of novel RXR ligands like Vitamin A5 are critical for understanding RXR signaling.
- Evolutionary conservation of direct ligand binding highlights its fundamental importance in RXR function and suggests potential for species-specific endogenous ligands.
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