Cited by 90RNA Research and SplicingGenomics and Chromatin DynamicsEpigenetics and DNA Methylation

Intragenic epigenetic changes modulate NCAM alternative splicing in neuronal differentiation

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Schor, Ignacio E, Fiszbein, Ana, Petrillo, Ezequiel, Kornblihtt, Alberto R·2013·The EMBO Journal

Abstract

Alternative splicing contributes to cell type-specific transcriptomes. Here, we show that changes in intragenic chromatin marks affect NCAM (neural cell adhesion molecule) exon 18 (E18) alternative splicing during neuronal differentiation. An increase in the repressive marks H3K9me2 and H3K27me3 along the gene body correlated with inhibition of polymerase II elongation in the E18 region, but without significantly affecting total mRNA levels. Treatment with the general DNA methylation inhibitor 5-azacytidine and BIX 01294, a specific inhibitor of H3K9 dimethylation, inhibited the differentiation-induced E18 inclusion, pointing to a role for repressive marks in sustaining NCAM splicing patterns typical of mature neurons. We demonstrate that intragenic deployment of repressive chromatin marks, induced by intronic small interfering RNAs targeting NCAM intron 18, promotes E18 inclusion in undifferentiated N2a cells, confirming the chromatin changes observed upon differentiation to be sufficient to induce alternative splicing. Combined with previous evidence that neuronal depolarization causes H3K9 acetylation and subsequent E18 skipping, our results show how two alternative epigenetic marks regulate NCAM alternative splicing and E18 levels in different cellular contexts.

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Crossref · 10.1038/emboj.2013.167

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  • Local changes of histone modifications such as acetylation or methylation and RNA Pol II speed occur on alternative spliced exons during cell response to depolarization and differentiation.

    “Along the same lines, local changes of histone modifications such as acetylation or methylation and RNA Pol II speed occur on alternative spliced exons during cell response to depolarization and differentiation (Schor et al, 2009; Schor et al, 2013; Sharma et al, 2014).”

    From RNA polymerase II speed: a key player in controlling and adapting transcriptome composition (2021) · cites this paper as Schor et al, 2013

    The Introduction and Discussion link neuronal depolarization and differentiation to changes in NCAM histone marks, RNA polymerase II elongation, and alternative splicing of exon E18. However, the Discussion says the histone-mark changes during differentiation are spread across the gene body, not specifically located at E18; the elongation change is more localized. Thus the claim overstates how precisely the histone changes occur at the alternative exon. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • RNA Pol II speed can vary on individual genes or downstream of genes in response to different stimuli.

    “Moreover, we and others have shown that RNA Pol II speed can vary on individual genes or downstream of genes in response to different stimuli (Schor et al, 2009; Schor et al, 2013; Sharma et al, 2014; Muniz et al, 2017).”
  • RNA Pol II velocity changes around alternatively spliced exons in specific genes, in response to cell depolarization and cellular differentiation.

    “Second, RNA Pol II velocity changes around alternatively spliced exons in specific genes, in response to cell depolarization and cellular differentiation (Schor et al, 2009; Schor et al, 2013; Sharma et al, 2014).”
  • Changes in RNA Pol II velocity measured in response to cell depolarization and cell differentiation regulate alternative splicing and thus RNA identity.

    “Indeed, changes in RNA Pol II velocity measured in response to cell depolarization and cell differentiation regulate alternative splicing and thus RNA identity (Schor et al, 2009; Schor et al, 2013; Sharma et al, 2014).”
  • An increase in H3K9 di-methylation and H3K27 tri-methylation correlates with a slow-down of RNA Pol II transcription.

    “Similarly, H3K9 hyperacetylation correlates with a change in the ratio of distal versus proximal pre‐mRNA levels suggesting a local increase in RNA Pol II speed (Schor et al, 2009), whereas an increase in H3K9 di‐methylation and H3K27 tri‐methylation correlates with a slow‐down of RNA Pol II transcription (Schor et al, 2013).”

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Authors
Schor, I. E., Fiszbein, A., Petrillo, E., & Kornblihtt, A. R.
Affiliations
Consejo Nacional de Investigaciones Científicas y Técnicas (AR)
Corresponding author
Kornblihtt, Alberto R
Venue
The EMBO Journal
Published
2013-07-26
Volume
32
Issue
16
Pages
2264-2274
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2106478804
Cited by
90
References
64
Citations by year
2025: 4 · 2024: 9 · 2023: 3 · 2022: 8 · 2021: 3 · 2020: 6 · 2019: 10 · 2018: 4 · 2017: 8 · 2016: 7 · 2015: 12 · 2014: 15 · 2013: 1
FWCI
5.22
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Conicet (submittedVersion, cc-by-nc-sa)
Funders
  • Howard Hughes Medical Institute
  • Consejo Nacional de Investigaciones Científicas y Técnicas
  • Universidad de Buenos Aires (CONICET)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
Keywords
CD56, alternative splicing, neuronal differentiation, H3K9me2, H3K27me3, DNA methylation, azacitidine, BIX-01294, RNA polymerase II elongation, siRNA, N2a cells
MeSH terms
Animals, Azacitidine, Azepines, Cell Differentiation, Chromatin, Exons, Neurons, Quinazolines, Alternative Splicing, Sequence Analysis, DNA, DNA Primers, Neural Cell Adhesion Molecules, DNA Methylation, Reverse Transcriptase Polymerase Chain Reaction, RNA, Small Interfering, Epigenesis, Genetic, Cell Line, Tumor, Chromatin Immunoprecipitation, Mice, Real-Time Polymerase Chain Reaction

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