Using 5'-PTMs to repair mutant beta-globin transcripts.

Journal Article

Trans-splicing has been used to repair mutant RNA transcripts via competition for the spliceosome using pre-trans-splicing molecules, or "PTMs." Previous studies have demonstrated that functional PTMs can be designed for either 3'- or 5'-exon replacement, with a vast majority of the work to date focusing on repair of mutations within internal exons and via 3'-exon replacement. Here, we describe the first use of trans-splicing to target the first exon and intron of a therapeutically relevant gene and repair the mutant RNA by 5'-exon replacement. Our results show that 5'-PTMs can be designed to repair mutations in the beta-globin transcript involved in sickle cell anemia and beta-thalassemia while providing insight into considerations for competition between trans- versus cis-splicing in mammalian cells. Target transcripts with impaired cis-splicing capabilities, like those produced in some forms of beta-thalassemia, are more efficiently repaired via trans-splicing than targets in which cis-splicing is unaffected as with sickle beta-globin. This study reveals desirable characteristics in substrate RNAs for trans-splicing therapeutics as well as provides an opportunity for further exploration into general splicing mechanisms via 5'-PTMs.

Full Text

Duke Authors

Cited Authors

  • Kierlin-Duncan, MN; Sullenger, BA

Published Date

  • August 2007

Published In

Volume / Issue

  • 13 / 8

Start / End Page

  • 1317 - 1327

PubMed ID

  • 17556711

International Standard Serial Number (ISSN)

  • 1355-8382

Digital Object Identifier (DOI)

  • 10.1261/rna.525607

Language

  • eng

Conference Location

  • United States