Restoration of the cystic fibrosis transmembrane conductance regulator function by splicing modulation.

Published

Journal Article

A significant fraction of disease-causing mutations affects pre-mRNA splicing. These mutations can generate both aberrant and correct transcripts, the level of which varies among different patients. An inverse correlation was found between this level and disease severity, suggesting a role for splicing regulation as a genetic modifier. Overexpression of splicing factors increased the level of correctly spliced RNA, transcribed from minigenes carrying disease-causing splicing mutations. However, whether this increase could restore the protein function was unknown. Here, we demonstrate that overexpression of Htra2-beta1 and SC35 increases the level of normal cystic fibrosis transmembrane conductance regulator (CFTR) transcripts in cystic-fibrosis-derived epithelial cells carrying the 3849+10 kb C --> T splicing mutation. This led to activation of the CFTR channel and restoration of its function. Restoration was also obtained by sodium butyrate, a histone deacetylase inhibitor, known to upregulate the expression of splicing factors. These results highlight the therapeutic potential of splicing modulation for genetic diseases caused by splicing mutations.

Full Text

Duke Authors

Cited Authors

  • Nissim-Rafinia, M; Aviram, M; Randell, SH; Shushi, L; Ozeri, E; Chiba-Falek, O; Eidelman, O; Pollard, HB; Yankaskas, JR; Kerem, B

Published Date

  • November 2004

Published In

Volume / Issue

  • 5 / 11

Start / End Page

  • 1071 - 1077

PubMed ID

  • 15472711

Pubmed Central ID

  • 15472711

International Standard Serial Number (ISSN)

  • 1469-221X

Digital Object Identifier (DOI)

  • 10.1038/sj.embor.7400273

Language

  • eng

Conference Location

  • England