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Related Experiment Videos

Fully modified 2' MOE oligonucleotides redirect polyadenylation.

T A Vickers1, J R Wyatt, T Burckin

  • 1Isis Pharmaceuticals, Department of Molecular and Structural Biology, 2280 Faraday Avenue, Carlsbad, CA 92008, USA. tvickers@isisph.com

Nucleic Acids Research
|March 10, 2001
PubMed
Summary
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Antisense oligonucleotides can redirect polyadenylation site selection, leading to increased mRNA stability and altered protein expression. This novel approach enhances, rather than reduces, specific mRNA abundance.

Area of Science:

  • Molecular Biology
  • Gene Regulation
  • RNA Processing

Background:

  • Alternative polyadenylation (APA) signals influence mRNA stability by determining the inclusion of destabilization motifs.
  • The selection of polyadenylation sites is a critical regulatory mechanism affecting gene expression levels.

Purpose of the Study:

  • To investigate the use of antisense oligonucleotides to manipulate polyadenylation site selection.
  • To determine if redirecting polyadenylation can alter mRNA stability and protein expression.

Main Methods:

  • Utilized modified 2'-O-methoxyethyl/phosphorothioate oligonucleotides targeting the E-selectin 3'-most polyadenylation signal.
  • Inhibited polyadenylation at the primary site and induced it at upstream cryptic sites.

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Main Results:

  • Antisense treatment successfully inhibited polyadenylation at the E-selectin 3'-most site.
  • Polyadenylation was redirected to upstream cryptic sites, resulting in shorter transcripts.
  • Shorter transcripts contained fewer destabilization sequences, leading to increased mRNA stability.
  • Altered protein expression was observed following the manipulation of mRNA stability.

Conclusions:

  • Antisense oligonucleotides can effectively redirect polyadenylation site selection.
  • This strategy represents a novel method to increase mRNA abundance by enhancing stability.
  • Demonstrates the first use of oligonucleotides to increase, rather than decrease, message abundance.