Phenylhydrazones as Correctors of a Mutant Cystic Fibrosis Transmembrane Conductance Regulator

Erika Nieddu, Benedetta Pollarolo, Marco T. Mazzei, Maria Anzaldi, Silvia Schenone, Nicoletta Pedemonte, Luis J V Galietta, Mauro Mazzei

Research output: Contribution to journalArticlepeer-review


The phenylhydrazone RDR-1 is endowed with moderate activity as F508del-CFTR corrector; nevertheless, its simple structure enables stimulating developments in this class of correctors. Therefore, we synthesized a number of phenylhydrazones 3 by reacting phenylhydrazine derivatives 1 with furfural derivatives 2. By the same reaction, also the pyridine derivatives 4, the thiophene derivatives 5, and the hydrazides 6 and 7 were prepared. All compounds were tested as F508del-CFTR correctors in the cystic fibrosis (CF) bronchial epithelial cell line CFBE41o-, using corr-4a and VX-809 as controls. Some of the tested compounds emerged as interesting F508del-CFTR correctors at 20 μM (3c) and 2 μM (5d). 3c and 5d administered together with VX-809 produced a satisfactory additivity of action. When the structure of 5d was overlapped with RDR-1 and five other established correctors, a shared central design was clearly visible. This fact may be of interest in the search for new F508del-CFTR correctors. Starting from RDR-1, a known F508del-CFTR corrector, some phenylhydrazones were synthesized. Two new compounds (3c and 5d) showed encouraging activity and, when administered together with the corrector VX-809, gave an additivity of action. Overlapping the molecular design of 5d with RDR-1 and other known correctors revealed a common structural moiety, which may help in the search for new drugs against cystic fibrosis.

Original languageEnglish
Pages (from-to)112-123
Number of pages12
JournalArchiv der Pharmazie
Issue number2
Publication statusPublished - Feb 1 2016


  • CFTR
  • Correctors
  • Cystic fibrosis
  • Ion channels
  • Phenylhydrazones

ASJC Scopus subject areas

  • Drug Discovery
  • Pharmaceutical Science


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