کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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4208360 | 1280438 | 2014 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Combined effects of VX-770 and VX-809 on several functional abnormalities of F508del-CFTR channels Combined effects of VX-770 and VX-809 on several functional abnormalities of F508del-CFTR channels](/preview/png/4208360.png)
BackgroundThe most common cystic fibrosis-associated mutation, the deletion of phenylalanine 508 (F508del), results in channels with poor membrane expression and impaired function. VX-770, a clinically approved drug for treatment of CF patients carrying the G551D mutation, and VX-809, a corrector shown in vitro to increase membrane expression of mutant channels, are currently undergoing clinical trials, but functional data at the molecular level is still lacking.MethodsThe effect of VX-770 and VX-809 on the multiple functional defects of F508del-CFTR was assessed via excised inside-out patch-clamp experiments.ResultsVX-770 completely restores the low opening-rate of F508del-CFTR, with smaller open-time increase, in temperature-corrected and VX-809-treated channels. The shorter locked-open time of hydrolysis-deficient F508del-CFTR is also prolonged by VX-770. VX-809 does not improve channel function by itself as previously reported.ConclusionsThe results from these studies can be interpreted as an equilibrium shift toward the open-channel conformation of F508del-CFTR channels.
Journal: Journal of Cystic Fibrosis - Volume 13, Issue 5, September 2014, Pages 508–514