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Pre-mRNA Splicing Modulation by Antisense Oligonucleotides.

Natalia N Singh1, Diou Luo2, Ravindra N Singh2

  • 1Department of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA, USA. natalias@iastate.edu.

Methods in Molecular Biology (Clifton, N.J.)
|September 2, 2018
PubMed
Summary
This summary is machine-generated.

Antisense oligonucleotides (ASOs) can modulate pre-messenger RNA (mRNA) splicing. This study describes an ASO approach to increase full-length SMN2 mRNA production in spinal muscular atrophy patient cells.

Keywords:
2′-O-methyl modificationAntisense oligonucleotide (ASO)Intronic splicing silencer N1 (ISS-N1)NucleofectionPhosphoroamidate morpholino oligonucleotide (PMO)Phosphorothioate backbonePre-mRNA splicingSpinal muscular atrophy (SMA)Survival motor neuron (SMN)Transfection

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Area of Science:

  • Molecular Biology
  • Genetics
  • RNA Biology

Background:

  • Pre-mRNA splicing is a complex process involving intron removal and exon joining, regulated by cis-elements and RNA structures.
  • Splicing cis-elements are short motifs that bind proteins, influencing splicing outcomes.
  • RNA secondary structures can affect the accessibility of these splicing cis-elements.

Purpose of the Study:

  • To investigate the therapeutic potential of antisense oligonucleotides (ASOs) for modulating pre-mRNA splicing.
  • To develop an ASO-based strategy to enhance the production of full-length SMN2 mRNA.
  • To address the genetic basis of spinal muscular atrophy (SMA) by targeting SMN2 mRNA splicing.

Main Methods:

  • Designing and utilizing antisense oligonucleotides (ASOs) to interact with specific splicing cis-elements.
  • Employing ASOs to block or alter the accessibility of splicing cis-elements on pre-mRNA.
  • Investigating the effect of ASOs on RNA structure and splicing modulation in vitro and in vivo.
  • Analyzing the production of full-length SMN2 mRNA in patient-derived cells.

Main Results:

  • ASOs were demonstrated to effectively modulate pre-mRNA splicing by targeting cis-elements.
  • The developed ASO strategy successfully increased the production of full-length SMN2 mRNA.
  • This approach showed promise in correcting splicing defects relevant to spinal muscular atrophy.

Conclusions:

  • ASO-based strategies represent a powerful tool for the therapeutic manipulation of RNA splicing.
  • Targeting splicing cis-elements with ASOs can restore the production of functional SMN2 mRNA.
  • This study provides a foundation for ASO-based therapies for spinal muscular atrophy and other splicing-related disorders.