Potentiation of ΔF508- and G551D-CFTR-Mediated Cl- Current by Novel Hydroxypyrazolines

The most common mutation of CFTR, affecting approximately 90% of CF patients, is a deletion of phenylalanine at position 508 (F508del, ΔF508). Misfolding of ΔF508-CFTR impairs both its trafficking to the plasma membrane and its chloride channel activity. To identify small molecules that can restore...

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Veröffentlicht in:PloS one 2016-02, Vol.11 (2), p.e0149131-e0149131
Hauptverfasser: Park, Jinhong, Khloya, Poonam, Seo, Yohan, Kumar, Satish, Lee, Ho K, Jeon, Dong-Kyu, Jo, Sungwoo, Sharma, Pawan K, Namkung, Wan
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container_title PloS one
container_volume 11
creator Park, Jinhong
Khloya, Poonam
Seo, Yohan
Kumar, Satish
Lee, Ho K
Jeon, Dong-Kyu
Jo, Sungwoo
Sharma, Pawan K
Namkung, Wan
description The most common mutation of CFTR, affecting approximately 90% of CF patients, is a deletion of phenylalanine at position 508 (F508del, ΔF508). Misfolding of ΔF508-CFTR impairs both its trafficking to the plasma membrane and its chloride channel activity. To identify small molecules that can restore channel activity of ΔF508-CFTR, we synthesized and evaluated eighteen novel hydroxypyrazoline analogues as CFTR potentiators. To elucidate potentiation activities of hydroxypyrazolines for ΔF508-CFTR, CFTR activity was measured using a halide-sensitive YFP assay, Ussing chamber assay and patch-clamp technique. Compounds 7p, 7q and 7r exhibited excellent potentiation with EC50 value
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Misfolding of ΔF508-CFTR impairs both its trafficking to the plasma membrane and its chloride channel activity. To identify small molecules that can restore channel activity of ΔF508-CFTR, we synthesized and evaluated eighteen novel hydroxypyrazoline analogues as CFTR potentiators. To elucidate potentiation activities of hydroxypyrazolines for ΔF508-CFTR, CFTR activity was measured using a halide-sensitive YFP assay, Ussing chamber assay and patch-clamp technique. Compounds 7p, 7q and 7r exhibited excellent potentiation with EC50 value &lt;10 μM. Among the compounds, 7q (a novel CFTR potentiator, CP7q) showed the highest potentiation activity with EC50 values of 0.88 ± 0.11 and 4.45 ± 0.31 μM for wild-type and ΔF508-CFTR, respectively. In addition, CP7q significantly potentiated chloride conductance of G551D-CFTR, a CFTR gating mutant; its maximal potentiation activity was 1.9 fold higher than the well-known CFTR potentiator genistein. 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Khloya, Poonam ; Seo, Yohan ; Kumar, Satish ; Lee, Ho K ; Jeon, Dong-Kyu ; Jo, Sungwoo ; Sharma, Pawan K ; Namkung, Wan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c526t-4a1574d842f37daf52694465339fb40195f45522501e7e1c9168a8b03720ad23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Aminopyridines - therapeutic use</topic><topic>Animals</topic><topic>Bacterial Proteins - chemistry</topic><topic>Benzodioxoles - therapeutic use</topic><topic>Biology and Life Sciences</topic><topic>Cell Line</topic><topic>Cell Line, Tumor</topic><topic>Cell Membrane - metabolism</topic><topic>Cell Proliferation</topic><topic>Channel gating</topic><topic>Chemical synthesis</topic><topic>Chloride</topic><topic>Chloride conductance</topic><topic>Chlorides</topic><topic>Chlorides - chemistry</topic><topic>Clinical trials</topic><topic>Cyclic AMP - metabolism</topic><topic>Cystic fibrosis</topic><topic>Cystic Fibrosis - drug therapy</topic><topic>Cystic Fibrosis - genetics</topic><topic>Cystic Fibrosis Transmembrane Conductance Regulator - genetics</topic><topic>Cytotoxicity</topic><topic>Defects</topic><topic>Epithelial Cells - cytology</topic><topic>Gene Deletion</topic><topic>Genistein</topic><topic>Genistein - chemistry</topic><topic>Humans</topic><topic>Kinases</topic><topic>Luminescent Proteins - chemistry</topic><topic>Medicine and Health Sciences</topic><topic>Membrane trafficking</topic><topic>Mutation</topic><topic>Nose - physiology</topic><topic>Patch-Clamp Techniques</topic><topic>Pharmaceutical sciences</topic><topic>Pharmacy</topic><topic>Phenylalanine</topic><topic>Phenylalanine - genetics</topic><topic>Physical Sciences</topic><topic>Plasma</topic><topic>Potentiation</topic><topic>Proteins</topic><topic>Pyrazoles - therapeutic use</topic><topic>Rats</topic><topic>Research and analysis methods</topic><topic>Resistance</topic><topic>Structure-Activity Relationship</topic><topic>Sulfonamides - therapeutic use</topic><topic>Toxicity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Park, Jinhong</creatorcontrib><creatorcontrib>Khloya, Poonam</creatorcontrib><creatorcontrib>Seo, Yohan</creatorcontrib><creatorcontrib>Kumar, Satish</creatorcontrib><creatorcontrib>Lee, Ho K</creatorcontrib><creatorcontrib>Jeon, Dong-Kyu</creatorcontrib><creatorcontrib>Jo, Sungwoo</creatorcontrib><creatorcontrib>Sharma, Pawan K</creatorcontrib><creatorcontrib>Namkung, Wan</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Animal Behavior Abstracts</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Biotechnology Research Abstracts</collection><collection>Nursing &amp; 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Misfolding of ΔF508-CFTR impairs both its trafficking to the plasma membrane and its chloride channel activity. To identify small molecules that can restore channel activity of ΔF508-CFTR, we synthesized and evaluated eighteen novel hydroxypyrazoline analogues as CFTR potentiators. To elucidate potentiation activities of hydroxypyrazolines for ΔF508-CFTR, CFTR activity was measured using a halide-sensitive YFP assay, Ussing chamber assay and patch-clamp technique. Compounds 7p, 7q and 7r exhibited excellent potentiation with EC50 value &lt;10 μM. Among the compounds, 7q (a novel CFTR potentiator, CP7q) showed the highest potentiation activity with EC50 values of 0.88 ± 0.11 and 4.45 ± 0.31 μM for wild-type and ΔF508-CFTR, respectively. In addition, CP7q significantly potentiated chloride conductance of G551D-CFTR, a CFTR gating mutant; its maximal potentiation activity was 1.9 fold higher than the well-known CFTR potentiator genistein. Combination treatment with CP7q and VX-809, a corrector of ΔF508-CFTR, significantly enhanced functional rescue of ΔF508-CFTR compared with VX-809 alone. CP7q did not alter the cytosolic cAMP level and showed no cytotoxicity at the concentration showing maximum efficacy. The hydroxypyrazolines may be potential development candidates for drug therapy of cystic fibrosis.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>26863533</pmid><doi>10.1371/journal.pone.0149131</doi><oa>free_for_read</oa></addata></record>
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subjects Aminopyridines - therapeutic use
Animals
Bacterial Proteins - chemistry
Benzodioxoles - therapeutic use
Biology and Life Sciences
Cell Line
Cell Line, Tumor
Cell Membrane - metabolism
Cell Proliferation
Channel gating
Chemical synthesis
Chloride
Chloride conductance
Chlorides
Chlorides - chemistry
Clinical trials
Cyclic AMP - metabolism
Cystic fibrosis
Cystic Fibrosis - drug therapy
Cystic Fibrosis - genetics
Cystic Fibrosis Transmembrane Conductance Regulator - genetics
Cytotoxicity
Defects
Epithelial Cells - cytology
Gene Deletion
Genistein
Genistein - chemistry
Humans
Kinases
Luminescent Proteins - chemistry
Medicine and Health Sciences
Membrane trafficking
Mutation
Nose - physiology
Patch-Clamp Techniques
Pharmaceutical sciences
Pharmacy
Phenylalanine
Phenylalanine - genetics
Physical Sciences
Plasma
Potentiation
Proteins
Pyrazoles - therapeutic use
Rats
Research and analysis methods
Resistance
Structure-Activity Relationship
Sulfonamides - therapeutic use
Toxicity
title Potentiation of ΔF508- and G551D-CFTR-Mediated Cl- Current by Novel Hydroxypyrazolines
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