TDP43 depletion rescues aberrant CFTR exon 9 skipping

FEBS Lett. 2006 Feb 20;580(5):1339-44. doi: 10.1016/j.febslet.2006.01.052. Epub 2006 Jan 26.


CFTR exon 9 presents a 3' splice site polymorphism, (UG)mU(n), whose composition influences splicing. TDP43 specifically binds the UG tract of the transcript and inhibits splicing in vitro. We report that depletion of TDP43 through RNA interference removes splicing inhibition caused by unfavorable (UG)mU(n) sequences, indicating that TDP43 exerts a potent inhibitory effect in vivo. We also show that the UG-TDP43 interaction has a dominant role over other exon 9 splicing regulatory elements. These results suggest that TDP43 association near a splice site has determined the evolution of positive splicing regulatory elements to contrast this inhibition.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cystic Fibrosis Transmembrane Conductance Regulator / genetics*
  • DNA-Binding Proteins / deficiency
  • DNA-Binding Proteins / physiology*
  • Exons*
  • HeLa Cells
  • Humans
  • RNA Splice Sites / genetics
  • RNA, Small Interfering / pharmacology
  • Regulatory Elements, Transcriptional
  • Sequence Deletion*
  • Transfection


  • CFTR protein, human
  • DNA-Binding Proteins
  • RNA Splice Sites
  • RNA, Small Interfering
  • Cystic Fibrosis Transmembrane Conductance Regulator