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Evaluation of Exon Inclusion Induced by Splice Switching Antisense Oligonucleotides in SMA Patient Fibroblasts
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Systematic Approach to Developing Splice Modulating Antisense Oligonucleotides.

May T Aung-Htut1,2, Craig S McIntosh3,4, Kristin A Ham5

  • 1Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth, Western 6150, Australia.

International Journal of Molecular Sciences
|October 17, 2019
PubMed
Summary
This summary is machine-generated.

This study outlines guidelines for designing and evaluating splice-switching antisense oligonucleotides. These tools can therapeutically modulate gene expression by altering pre-mRNA processing for various genetic disorders.

Keywords:
2′-O-Methylantisense oligonucleotidesplice modulationtransfection

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Pre-messenger RNA (pre-mRNA) splicing is crucial for human gene expression.
  • Alternative splicing generates diverse protein isoforms, enhancing genetic plasticity.
  • Modulating pre-mRNA processing is a validated therapeutic strategy for genetic diseases like Duchenne muscular dystrophy and spinal muscular atrophy.

Purpose of the Study:

  • To present systematic guidelines for designing, evaluating, and optimizing splice-switching antisense oligonucleotides (ASOs).
  • To detail critical factors for in vitro assessment of ASOs targeting pre-mRNA splicing.

Main Methods:

  • Design and evaluation of over 5000 antisense oligonucleotides.
  • Systematic assessment of target splicing motifs, cell types, and delivery reagents.
  • Validation assays for screening ASOs with 2'-O-methyl modified bases on a phosphorothioate backbone.

Main Results:

  • Established comprehensive guidelines for ASO design and evaluation in vitro.
  • Demonstrated the feasibility of targeting diverse pre-mRNAs, from the longest human transcripts to shorter, exon-dense ones.
  • Identified critical parameters for successful splice-switching ASO screening.

Conclusions:

  • The developed guidelines provide a robust framework for creating effective splice-switching ASOs.
  • This approach holds significant potential for developing novel therapeutics for a range of genetic disorders.
  • Optimized ASO design and screening are essential for successful pre-mRNA processing modulation.