Altered mRNA splicing in SMN-depleted motor neuron-like cells

Sara K. Custer, Timra D. Gilson, Hongxia Li, A. Gary Todd, Jacob W. Astroski, Hai Lin, Yunlong Liu, Elliot Androphy

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Spinal muscular atrophy (SMA) is an intractable neurodegenerative disease afflicting 1 in 6-10,000 live births. One of the key functions of the SMN protein is regulation of spliceosome assembly. Reduced levels of the SMN protein that are observed in SMA have been shown to result in aberrant mRNA splicing. SMN-dependent mis-spliced transcripts in motor neurons may cause stresses that are particularly harmful and may serve as potential targets for the treatment of motor neuron disease or as biomarkers in the SMA patient population. We performed deep RNA sequencing using motor neuron-like NSC-34 cells to screen for SMN-dependent mRNA processing changes that occur following acute depletion of SMN. We identified SMN-dependent splicing changes, including an intron retention event that results in the production of a truncated Rit1 transcript. This intron-retained transcript is stable and is mis-spliced in spinal cord from symptomatic SMA mice. Constitutively active Rit1 ameliorated the neurite outgrowth defect in SMN depleted NSC-34 cells, while expression of the truncated protein product of the mis-spliced Rit1 transcript inhibited neurite extension. These results reveal new insights into the biological consequence of SMNdependent splicing in motor neuron-like cells.

Original languageEnglish (US)
Article numbere0163954
JournalPLoS One
Volume11
Issue number10
DOIs
StatePublished - Oct 1 2016

Fingerprint

Spinal Muscular Atrophy
muscular atrophy
Motor Neurons
motor neurons
Neurons
Messenger RNA
neurites
Introns
introns
spliceosomes
cells
Neurodegenerative diseases
Spliceosomes
RNA Sequence Analysis
High-Throughput Nucleotide Sequencing
Motor Neuron Disease
Proteins
protein products
neurodegenerative diseases
Live Birth

ASJC Scopus subject areas

  • Medicine(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

Cite this

Custer, S. K., Gilson, T. D., Li, H., Todd, A. G., Astroski, J. W., Lin, H., ... Androphy, E. (2016). Altered mRNA splicing in SMN-depleted motor neuron-like cells. PLoS One, 11(10), [e0163954]. https://doi.org/10.1371/journal.pone.0163954

Altered mRNA splicing in SMN-depleted motor neuron-like cells. / Custer, Sara K.; Gilson, Timra D.; Li, Hongxia; Todd, A. Gary; Astroski, Jacob W.; Lin, Hai; Liu, Yunlong; Androphy, Elliot.

In: PLoS One, Vol. 11, No. 10, e0163954, 01.10.2016.

Research output: Contribution to journalArticle

Custer, SK, Gilson, TD, Li, H, Todd, AG, Astroski, JW, Lin, H, Liu, Y & Androphy, E 2016, 'Altered mRNA splicing in SMN-depleted motor neuron-like cells', PLoS One, vol. 11, no. 10, e0163954. https://doi.org/10.1371/journal.pone.0163954
Custer SK, Gilson TD, Li H, Todd AG, Astroski JW, Lin H et al. Altered mRNA splicing in SMN-depleted motor neuron-like cells. PLoS One. 2016 Oct 1;11(10). e0163954. https://doi.org/10.1371/journal.pone.0163954
Custer, Sara K. ; Gilson, Timra D. ; Li, Hongxia ; Todd, A. Gary ; Astroski, Jacob W. ; Lin, Hai ; Liu, Yunlong ; Androphy, Elliot. / Altered mRNA splicing in SMN-depleted motor neuron-like cells. In: PLoS One. 2016 ; Vol. 11, No. 10.
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