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BioAssay: AID 501372

Inhibition of CFTR in nonpermeabilized human T84 cells assessed as inhibition of forskolin and IBMX-induced chloride current by short-circuit current analysis

Inhibitors of the cystic fibrosis transmembrane conductance regulator (CFTR) chloride channel are predicted to slow cyst enlargement in polycystic kidney disease and reduce intestinal fluid loss in secretory diarrheas. Screening of approximately 110000 small synthetic and natural compounds for inhibition of halide influx in CFTR-expressing epithelial cells yielded a new class of more ..
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 Tested Compounds
 Tested Compounds
All(1)
 
 
Active(1)
 
 
 Tested Substances
 Tested Substances
All(1)
 
 
Active(1)
 
 
AID: 501372
Data Source: ChEMBL (651412)
BioAssay Type: Confirmatory, Concentration-Response Relationship Observed
Depositor Category: Literature, Extracted
BioAssay Version:
Deposit Date: 2011-02-25
Modify Date: 2014-05-26

Data Table ( Complete ):           View Active Data    View All Data
Target
Sequence: RecName: Full=Cystic fibrosis transmembrane conductance regulator; Short=CFTR; AltName: Full=ATP-binding cassette sub-family C member 7; AltName: Full=Channel conductance-controlling ATPase; AltName: Full=cAMP-dependent chloride channel
Description ..   
Protein Family: ATP-binding cassette domain of the cystic fibrosis transmembrane regulator, subfamily C
Comment ..   

Gene:CFTR     Related Protein 3D Structures     More BioActivity Data..
BioActive Compound: 1
Description:
Title: Nanomolar potency pyrimido-pyrrolo-quinoxalinedione CFTR inhibitor reduces cyst size in a polycystic kidney disease model.

Abstract: Inhibitors of the cystic fibrosis transmembrane conductance regulator (CFTR) chloride channel are predicted to slow cyst enlargement in polycystic kidney disease and reduce intestinal fluid loss in secretory diarrheas. Screening of approximately 110000 small synthetic and natural compounds for inhibition of halide influx in CFTR-expressing epithelial cells yielded a new class of pyrimido-pyrrolo-quinoxalinedione (PPQ) CFTR inhibitors. Testing of 347 analogues established structure-activity relationships. The most potent compound, 7,9-dimethyl-11-phenyl-6-(5-methylfuran-2-yl)-5,6-dihydro-pyrimido[4',5'-3,4]pyrrolo[1,2-a]quinoxaline-8,10-(7H,9H)-dione, PPQ-102, completely inhibited CFTR chloride current with IC(50) approximately 90 nM. The PPQs, unlike prior CFTR inhibitors, are uncharged at physiological pH, and therefore not subject to membrane potential-dependent cellular partitioning or block efficiency. Patch-clamp analysis confirmed voltage-independent CFTR inhibition by PPQ-102 and showed stabilization of the channel closed state. PPQ-102 prevented cyst expansion and reduced the size of preformed cysts in a neonatal kidney organ culture model of polycystic kidney disease. PPQ-102 is the most potent CFTR inhibitor identified to date.
(PMID: 19785436)
Comment
Compounds with activity <= 50uM or explicitly reported as active by ChEMBL are flagged as active in this PubChem assay presentation.

Categorized Comment
Assay Type: Binding

Assay Data Source: Scientific Literature

BAO: Assay Format: cell-based format

Assay Cell Type: T84

Target Type: Target is a single protein chain

Result Definitions
TIDNameDescriptionHistogramTypeUnit
OutcomeThe BioAssay activity outcomeOutcome
1IC50*IC50 PubChem standard valueFloatμM
2IC50 activity commentIC50 activity commentString
3IC50 standard flagIC50 standard flagInteger
4IC50 qualifierIC50 qualifierString
5IC50 published valueIC50 published valueFloatμM
6IC50 standard valueIC50 standard valueFloatnM

* Activity Concentration.

Data Table (Concise)
Data Table ( Complete ):     View Active Data    View All Data
Classification
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