Abstract:
:A developing therapy of cystic fibrosis caused by the DeltaF508 mutation in CFTR employs correction of defective CFTR chloride channel gating by a 'potentiator' and of defective CFTR protein folding by a 'corrector'. Based on SAR data for phenylglycine-type potentiators and bithiazole correctors, we designed a hybrid molecule incorporating an enzymatic hydrolysable linker to deliver the potentiator (PG01) fragment 2 and the corrector (Corr-4a) fragment 13. The hybrid molecule 14 contained PG01-OH and Corr-4a-linker-CO(2)H moieties, linked with an ethylene glycol spacer through an ester bond. The potentiator 2 and corrector 13 fragments (after cleavage) had low micromolar potency for restoration of DeltaF508-CFTR channel gating and cellular processing, respectively. Cleavage of hybrid molecule 14 by intestinal enzymes under physiological conditions produced the active potentiator 2 and corrector fragments 13, providing proof-of-concept for small-molecule potentiator-corrector hybrids as a single drug therapy for CF caused by the DeltaF508 mutation.
journal_name
Bioorg Med Chem Lettjournal_title
Bioorganic & medicinal chemistry lettersauthors
Mills AD,Yoo C,Butler JD,Yang B,Verkman AS,Kurth MJdoi
10.1016/j.bmcl.2009.11.020subject
Has Abstractpub_date
2010-01-01 00:00:00pages
87-91issue
1eissn
0960-894Xissn
1464-3405pii
S0960-894X(09)01590-Xjournal_volume
20pub_type
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