Block of CFTR-dependent chloride currents by inhibitors of multidrug resistance-associated proteins

Tullia Diena, Raffaella Melani, Emanuela Caci, Nicoletta Pedemonte, Elvira Sondo, Olga Zegarra-Moran, Luis J V Galietta

Research output: Contribution to journalArticle

Abstract

The cystic fibrosis transmembrane conductance regulator (CFTR) is a membrane protein that belongs to the same family as multidrug resistance-associated proteins whose main function is to expel xenobiotics and physiological organic anions from the cell interior. Despite the overall structural similarity with these membrane proteins, CFTR is not an active transporter but is instead a Cl- channel. We have tested the ability of known inhibitors of multidrug resistance-associated proteins to affect CFTR Cl- currents. We have found that sulfinpyrazone, probenecid, and benzbromarone are also inhibitors of CFTR activity, with a mechanism involving blockage of the channel pore.

Original languageEnglish
Pages (from-to)127-131
Number of pages5
JournalEuropean Journal of Pharmacology
Volume560
Issue number2-3
DOIs
Publication statusPublished - Apr 10 2007

Keywords

  • CFTR
  • Channel blocker
  • Chloride channel
  • Multidrug resistance protein

ASJC Scopus subject areas

  • Cellular and Molecular Neuroscience
  • Pharmacology

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