931706-15-9

PPQ-102 (CFTR Inhibitor) is a reversible CFTR inhibitor that completely inhibits CFTR chloride currents (IC50 ~90 nM). PPQ-102 is not affected by membrane potential-dependent cell allocation or blocking efficiency (uncharged at physiological pH) and effectively prevents cyst enlargement in polycystic kidney disease[1].

A cell-permeable pyrimido-pyrrolo-quinoxalinedione (PPQ) compound that targets the intracellular nucleotide binding domain(s) of CFTR and inhibits CFTR-mediated chloride current in a reversible and voltage-independent manner. Single channel recordings of CFTR-expressing FRT cells upon forskolin (Cat. No. 344270) and IBMX (Cat. No. 410957) stimulation indicate that the nature of PPQ-102 inhibition is due to a stabilization of the channels in a closed state (7.8- vs. 0.4-fold increase of mean channel close vs. open time, respectively, with 1 μM PPQ-102). PPQ-102 at 5 μM is shown to completely prevent Sp-8-Br-cAMP- (Cat. No. 116818) induced cysts formation and reduce the size of preformed cysts in an ex vivo murine neonatal kidney organ culture.

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[1] Tradtrantip L, et al. Nanomolar potency pyrimido-pyrrolo-quinoxalinedione CFTR inhibitor reduces cyst size in a polycystic kidney disease model. J Med Chem. 2009 Oct 22;52(20):6447-55. DOI:10.1021/jm9009873