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Updated: Jan 23, 2026

Real Time Monitoring of Intracellular Bile Acid Dynamics Using a Genetically Encoded FRET-based Bile Acid Sensor
Published on: January 4, 2016
Bile Acid-Activated Receptors: A Review on FXR and Other Nuclear Receptors
Dong-Ju Shin1, Li Wang2,3
1Department of Physiology and Neurobiology, University of Connecticut, Storrs, CT, USA. dong-ju.shin@uconn.edu.
Abstract:
Nuclear receptors (NRs) are ligand-dependent transcription factors that are involved in various biological processes including metabolism, reproduction, and development. Upon activation by their ligands, NRs bind to their specific DNA elements, exerting their biological functions by regulating their target gene expression. Bile acids are detergent-like molecules that are synthesized in the liver. They not only function as a facilitator for the digestion of lipids and fat-soluble vitamins but also serve as signaling molecules for several nuclear receptors to regulate diverse biological processes including lipid, glucose, and energy metabolism, detoxification and drug metabolism, liver regeneration, and cancer. The nuclear receptors including farnesoid X receptor (FXR), pregnane X receptor (PXR), constitutive androstane receptor (CAR), vitamin D receptor (VDR), and small heterodimer partner (SHP) constitute an integral part of the bile acid signaling. This chapter reviews the role of the NRs in bile acid homeostasis, highlighting the regulatory functions of the NRs in lipid and glucose metabolism in addition to bile acid metabolism.
Insights
Nuclear receptors (NRs) regulate bile acid homeostasis and metabolism. These signaling pathways are integral to lipid, glucose, and energy balance.
Area of Science:
- Endocrinology
- Molecular Biology
- Metabolic Research
Background:
- Nuclear receptors (NRs) are crucial ligand-dependent transcription factors governing biological processes.
- Bile acids, synthesized in the liver, act as signaling molecules regulating metabolism, detoxification, and regeneration.
- NRs and bile acids form an intricate signaling network impacting various physiological functions.
Purpose of the Study:
- To review the role of nuclear receptors in maintaining bile acid homeostasis.
- To highlight the regulatory functions of NRs in bile acid, lipid, and glucose metabolism.
- To elucidate the interplay between bile acid signaling and nuclear receptor activity.
Main Methods:
- Literature review focusing on nuclear receptors and bile acid signaling.
- Analysis of the regulatory roles of specific NRs (FXR, PXR, CAR, VDR, SHP) in bile acid metabolism.
- Examination of NR involvement in lipid and glucose metabolic pathways.
Main Results:
- Nuclear receptors are integral to bile acid signaling and homeostasis.
- Specific NRs like FXR, PXR, CAR, and VDR play key roles in regulating bile acid metabolism.
- NRs significantly influence lipid and glucose metabolism through bile acid signaling pathways.
Conclusions:
- Nuclear receptors are essential regulators of bile acid homeostasis.
- The interplay between bile acids and NRs is critical for metabolic regulation.
- Understanding these pathways offers insights into metabolic disorders and therapeutic strategies.
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