Evidence map›Paper›PMID 23630626›Full record

ArticlePloS one2013

Improved antisense oligonucleotide design to suppress aberrant SMN2 gene transcript processing: towards a treatment for spinal muscular atrophy.

Chalermchai Mitrpant, Paul Porensky, Haiyan Zhou, Loren Price, Francesco Muntoni, Sue Fletcher, Steve D Wilton, Arthur H M Burghes

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 49 papers.

0numbers the graph read from it
0cells of the map it votes in
49citing papers in PubMed
5.8field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

49 citing papers in PubMed, 70 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Morpholino-Mediated Exon Inclusion for Spinal Muscular Atrophy (SMA).Methods in molecular biology (Clifton, N.J.) · 2025
    Article
  5. Article
  6. Article
  7. Review
  8. Review
  9. Article
  10. Article
  11. Design of Bifunctional Antisense Oligonucleotides for Exon Inclusion.Methods in molecular biology (Clifton, N.J.) · 2022
    Article
  12. Article
  13. Spinal muscular atrophy: Broad disease spectrum and sex-specific phenotypes.Biochimica et biophysica acta. Molecular basis of disease · 2021
    Review
  14. Review
  15. Article
  16. Article
  17. Article
  18. Review
  19. Article
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 5 institutions in 4 countries.

Chalermchai MitrpantCentre for Neuromuscular and Neurological Disorders, The University of Western Australia, QE II Medical Centre, Perth, Western Australia.
Paul Porensky
Haiyan Zhou
Loren Price
Francesco Muntoni
Sue Fletcher
Steve D Wilton
Arthur H M Burghes
University of Western Australia · AUUniversity College London · GBNeurological Surgery · USQueen Elizabeth II Medical Centre · AUThe Ohio State University Wexner Medical Center · US

Funding

Therapy for Spinal Muscular AtrophyR01HD060586 · NICHD · OHIO STATE UNIVERSITY · PI BURGHES, ARTHUR H. M. · 2010 to 2021
$3.7M
Delivery of therapeutic genes in motor neuron diseaseRC2NS069476 · NINDS · OHIO STATE UNIVERSITY · PI BURGHES, ARTHUR H. M., CLEVELAND, DON W · 2009 to 2010
$3.4M
Medical Research Council MR/K000608/1NICHD NIH HHS R01 HD060586NINDS NIH HHS NS069476NINDS NIH HHS RC2 NS069476Wellcome Trust
6 · The paper itself

Abstract

Spinal muscular atrophy (SMA) is caused by loss of the Survival Motor Neuron 1 (SMN1) gene, resulting in reduced SMN protein. Humans possess the additional SMN2 gene (or genes) that does produce low level of full length SMN, but cannot adequately compensate for loss of SMN1 due to aberrant splicing. The majority of SMN2 gene transcripts lack exon 7 and the resultant SMNΔ7 mRNA is translated into an unstable and non-functional protein. Splice intervention therapies to promote exon 7 retention and increase amounts of full-length SMN2 transcript offer great potential as a treatment for SMA patients. Several splice silencing motifs in SMN2 have been identified as potential targets for antisense oligonucleotide mediated splice modification. A strong splice silencer is located downstream of exon 7 in SMN2 intron 7. Antisense oligonucleotides targeting this motif promoted SMN2 exon 7 retention in the mature SMN2 transcripts, with increased SMN expression detected in SMA fibroblasts. We report here systematic optimisation of phosphorodiamidate morpholino oligonucleotides (PMO) that promote exon 7 retention to levels that rescued the phenotype in a severe mouse model of SMA after intracerebroventricular delivery. Furthermore, the PMO gives the longest survival reported to date after a single dosing by ICV.

Indexed as

RNA Processing, Post-TranscriptionalAnimalsBase SequenceCells, CulturedGenetic TherapyHumansInjections, IntraventricularMiceMice, TransgenicMorpholinosMuscular Atrophy, SpinalOligonucleotides, AntisenseRNA InterferenceRNA, MessengerSurvival of Motor Neuron 2 ProteinTitrimetryMorpholinosOligonucleotides, AntisenseRNA, MessengerSMN2 protein, humanSurvival of Motor Neuron 2 Protein

Identifiers

PMID23630626
PMCPMC3632594
OpenAlexW1979404984

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.