Uptake of fluorescent dyes associated with the functional expression of the cystic fibrosis transmembrane conductance regulator in epithelial cells

Robert P. Wersto, Eugene R. Rosenthal, Ronald Crystal, Kenneth R. Spring

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17 Citations (Scopus)


Specific mutations in the cystic fibrosis transmembrane conductance regulator (CFTR), the most common autosomal recessive fatal genetic disease of Caucasians, result in the loss of epithelial cell adenosine 3',5'-cyclic- monophosphate (cAMP)-stimulated Cl- conductance. We show that the influx of a fluorescent dye, dihydrorhodamine 6G (dR6G), is increased in cells expressing human CFTR after retrovirus- and adenovirus-mediated gene transfer. dR6G influx is stimulated by cAMP and is inhibited by antagonists of cAMP action. Dye uptake is ATP-dependent and inhibited by Cl- removal or the addition of 10 mM SCN-. Increased staining is associated with functional activation of CFTR Cl- permeability. dR6G staining enables both the fluorescent assessment of CFTR function and the identification of successfully corrected cells after gene therapy.

Original languageEnglish
Pages (from-to)1167-1172
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number3
Publication statusPublished - 6 Feb 1996
Externally publishedYes



  • gene therapy

ASJC Scopus subject areas

  • General

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