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Methods for the Discovery of Novel Compounds Modulating a Gamma-Aminobutyric Acid Receptor Type A Neurotransmission
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Characterizing ligands for farnesoid X receptor--available in vitro test systems for farnesoid X receptor modulator

Daniel Merk1, Dieter Steinhilber, Manfred Schubert-Zsilavecz

  • 1Goethe-University Frankfurt, Institute of Pharmaceutical Chemistry , Max-von-Laue-Str. 9, D-60438 Frankfurt am Main , Germany merk@pharmchem.uni-frankfurt.de.

Expert Opinion on Drug Discovery
|November 23, 2013
PubMed
Abstract

Insights

Developing new Farnesoid X receptor (FXR) drugs requires robust in vitro tests. Current assays for FXR ligands are limited and may not fully assess drug candidates.

Area of Science:

  • Biochemistry
  • Pharmacology
  • Molecular Biology

Background:

  • Farnesoid X receptor (FXR) is a key nuclear receptor involved in metabolic and inflammatory diseases.
  • FXR regulates gene transcription, making it a significant therapeutic target.

Purpose of the Study:

  • To review and evaluate existing in vitro test systems for characterizing Farnesoid X receptor (FXR) ligands.
  • To assess the adequacy of current assays for evaluating novel FXR-targeting drug candidates.

Main Methods:

  • Compilation and description of published cell-based functional assays and binding assays for FXR ligands.
  • Evaluation of the information obtainable from these diverse in vitro assays.

Main Results:

  • In vitro screening of FXR ligands predominantly utilizes reporter gene assays.
  • Co-activator recruitment assays and quantitative PCR (qPCR) for target gene analysis are also employed.
  • The range of available test systems for FXR is notably limited compared to other nuclear receptors like PPARs.

Conclusions:

  • Current in vitro assays may be insufficient for comprehensive characterization of FXR-targeting drug candidates.
  • Further development of diverse and robust test systems is needed for FXR ligand evaluation.

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