Related Experiment Video
Updated: May 27, 2025

Screening and Identification of Small Peptides Targeting Fibroblast Growth Factor Receptor2 using a Phage Display Peptide Library
Published on: September 30, 2019
Farnesoid X receptor and fibroblast growth factor 15/19 as pharmacological targets
Syeda Maliha1, Grace L Guo1,2,3,4,5
1Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, NJ, USA.
Abstract:
The farnesoid X receptor (FXR) is a nuclear receptor and transcriptional regulator activated by bile acids or synthetic FXR agonists. FXR is expressed highly in the liver and intestine where modulation of FXR critically regulates the expression of genes involved in cholesterol and bile acid homeostasis, hepatic gluconeogenesis/lipogenesis, and inflammation. We review the roles of FXR and one of its intestinal target genes, fibroblast growth factor (FGF) 15 in mice/FGF19 in humans, play in regulating these important pathways in health and diseases. The main purpose of this review is to review therapeutics that target bile acid signaling to treat non-alcoholic steatohepatitis (NASH), a stage of disease within the spectrum of non-alcoholic fatty liver disease (NAFLD) with a focus on current preclinical studies in mice and clinical research. NASH is a huge medical burden and characterized by hepatic steatosis, inflammation, and progressive development of liver fibrosis. However, there is currently no Food and Drug Administration approved treatment option for NASH. While there are multiple factors contributing to NASH pathophysiology, bile acid regulation is proposed to have a major role in NASH pathogenesis. Synthetic FXR agonists and FGF19 protein may be promising agents to treat NASH, with obeticholic acid (OCA), cilofexor, tropifexor, nidufexor, EDP-305, and NGM282 currently in phase II or III clinical trials of NASH. FXR antagonism has also emerged, and antagonists like ursodeoxycholic acid (UDCA) and glycine-beta-muricholic acid (Gly-MCA) are in pre-clinical stage development for NASH treatment. This mini review seeks to evaluate and organize the literature available on FXR ligands and pathways for the treatment of NASH.
Insights
Farnesoid X receptor (FXR) agonists and FGF19 analogs show promise for treating non-alcoholic steatohepatitis (NASH). Research is exploring FXR antagonism as well, with several drug candidates in preclinical and clinical development for this liver disease.
Area of Science:
- Hepatology
- Endocrinology
- Pharmacology
Background:
- The farnesoid X receptor (FXR) is a nuclear receptor regulating bile acid and cholesterol homeostasis, crucial in liver and intestinal functions.
- Dysregulation of FXR signaling contributes to non-alcoholic steatohepatitis (NASH), a progressive liver disease with no current FDA-approved treatments.
- Fibroblast growth factor 15 (FGF15) in mice and FGF19 in humans, an FXR target gene, plays a role in these metabolic pathways.
Purpose of the Study:
- To review current therapeutic strategies targeting bile acid signaling for non-alcoholic steatohepatitis (NASH).
- To focus on preclinical and clinical research of FXR agonists and FGF19 analogs in NASH treatment.
- To evaluate the potential of FXR antagonism as a therapeutic approach for NASH.
Main Methods:
- Literature review of preclinical studies in mice and clinical trials in humans.
- Analysis of the role of FXR and its target gene FGF19 in NASH pathogenesis.
- Evaluation of FXR agonists, FGF19 analogs, and FXR antagonists in NASH treatment.
Main Results:
- Several synthetic FXR agonists (e.g., OCA, cilofexor) and FGF19 analogs (e.g., NGM282) are in clinical trials for NASH.
- FXR antagonism using agents like UDCA and Gly-MCA is under preclinical investigation for NASH.
- Bile acid regulation is a key factor in NASH pathophysiology, making FXR a significant therapeutic target.
Conclusions:
- FXR modulation, through agonists or antagonists, represents a promising therapeutic avenue for NASH.
- Targeting bile acid signaling pathways offers potential for treating NASH, a condition with significant unmet medical needs.
- Ongoing clinical trials will determine the efficacy and safety of FXR-targeted therapies for NASH patients.
More Related Videos
Related Concept Videos
Transducer Mechanism: Nuclear Receptors
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
Transducer Mechanism: Enzyme-Linked Receptors
Major types that are helpful drug targets include:
Transducer Mechanism: G Protein–Coupled Receptors
GPCRs are also called heptahelical,...
Introduction to Fibroblasts
TGF - β Signaling Pathway
Mitogens and the Cell Cycle

![An Automated Radiosynthesis of [68Ga]Ga-FAPI-46 for Routine Clinical Use](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F66708.jpg&w=3840&q=50)