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Forskolin-induced Swelling in Intestinal Organoids: An In Vitro Assay for Assessing Drug Response in Cystic Fibrosis Patients
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CFTR inhibitors.

Alan S Verkman1, David Synder, Lukmanee Tradtrantip

  • 1University of California-San Francisco, CA 94143-0521, U.S.A. Alan.Verkman@ucsf.edu

Current Pharmaceutical Design
|January 22, 2013
PubMed
Summary

Researchers identified potent cystic fibrosis transmembrane conductance regulator (CFTR) inhibitors. These compounds, targeting CFTR protein, show promise for treating diarrheal diseases and polycystic kidney disease.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Pharmacology

Background:

  • The cystic fibrosis transmembrane conductance regulator (CFTR) protein is a crucial cAMP-regulated chloride channel essential for epithelial fluid secretion.
  • Dysfunctional CFTR underlies cystic fibrosis and contributes to secretory diarrheas and polycystic kidney disease.

Purpose of the Study:

  • To identify and characterize small molecule inhibitors of CFTR.
  • To explore the therapeutic potential of CFTR inhibitors for various diseases.

Main Methods:

  • High-throughput screening of chemical libraries.
  • Characterization of inhibitor mechanisms of action (extracellular vs. cytoplasmic targeting).
  • Assessment of inhibitor potency (IC50 values).

Main Results:

  • Identification of thiazolidinone, glycine hydrazide, and quinoxalinedione chemical classes as CFTR inhibitors.
  • Glycine hydrazides target the extracellular CFTR pore; thiazolidinones and quinoxalinediones act on the cytoplasmic surface.
  • The most potent inhibitor demonstrated an IC50 of approximately 4 nM.

Conclusions:

  • CFTR inhibitors are valuable tools for studying CFTR function.
  • These inhibitors hold therapeutic potential for enterotoxin-mediated diarrheas and polycystic kidney disease, supported by animal model studies.