Cited by 77Epigenetics and DNA MethylationPluripotent Stem Cells ResearchNeurogenesis and neuroplasticity mechanisms

Global DNA methylation remodeling during direct reprogramming of fibroblasts to neurons

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Luo, Chongyuan, Lee, Qian Yi, Wapinski, Orly, Castanon, Rosa, Nery, Joseph R, Mall, Moritz, Kareta, Michael S, Cullen, Sean M +4 more·2019·eLife

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Abstract

Direct reprogramming of fibroblasts to neurons induces widespread cellular and transcriptional reconfiguration. Here, we characterized global epigenomic changes during the direct reprogramming of mouse fibroblasts to neurons using whole-genome base-resolution DNA methylation (mC) sequencing. We found that the pioneer transcription factor Ascl1 alone is sufficient for inducing the uniquely neuronal feature of non-CG methylation (mCH), but co-expression of Brn2 and Mytl1 was required to establish a global mCH pattern reminiscent of mature cortical neurons. Ascl1 alone induced promoter CG methylation (mCG) of fibroblast specific genes, while BAM overexpression additionally targets a competing myogenic program and directs a more faithful conversion to neuronal cells. Ascl1 induces local demethylation at its binding sites. Surprisingly, co-expression with Brn2 and Mytl1 inhibited the ability of Ascl1 to induce demethylation, suggesting a contextual regulation of transcription factor - epigenome interaction. Finally, we found that de novo methylation by DNMT3A is required for efficient neuronal reprogramming.

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  • Cellular aging features and adult-like neuronal identity of iNs are likely critical for the emergence of such phenotypes in sporadic AD neurons.

    “Cellular aging features (Huh et al., 2016; Mertens et al., 2015a, 2018; Tang et al., 2017; Victor et al., 2014) and adult-like neuronal identity of iNs (Luo et al., 2019) are likely critical for the emergence of such phenotypes in sporadic AD neurons, because erasure of aging signatures and re-gaining of fetal identity represents a potent rescue in this study (Miller et al., 2013; Ocampo et al., 2”

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Authors
Luo, C., Lee, Q. Y., Wapinski, O., Castanon, R., Nery, J. R., Mall, M., Kareta, M. S., Cullen, S. M., Goodell, M. A., Chang, H. Y., Wernig, M., & Ecker, J. R.
Affiliations
  • Salk Institute for Biological Studies (US)
  • Institute for Stem Cell Biology and Regenerative Medicine (US)
  • Stanford University (US)
  • Baylor College of Medicine (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
  • Wernig, Marius
  • Ecker, Joseph R
Venue
eLife
Published
2019-01-15
Volume
8
ISSN
2050-084X (ISSN-L)
OpenAlex
W2952307328
Cited by
76
References
40
Citations by year
2026: 4 · 2025: 8 · 2024: 4 · 2023: 10 · 2022: 11 · 2021: 18 · 2020: 14 · 2019: 6 · 2018: 1
FWCI
4.03
Type
journal article
Language
en
Open access
Locations
  • eLife (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Institute of Diabetes and Digestive and Kidney Diseases
  • Howard Hughes Medical Institute
  • National Human Genome Research Institute
  • California Institute for Regenerative Medicine
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Pluripotent Stem Cells Research
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
direct reprogramming, fibroblast-to-neuron conversion, DNA methylation, non-CG methylation, ASCL1, Brn2, Myt1, Bam, demethylation, DNMT3A, de novo methylation, cortical neurons
MeSH terms
DNA Methyltransferase 3A, Animals, DNA (Cytosine-5-)-Methyltransferases, Fibroblasts, Mice, Inbred C57BL, Neurons, Promoter Regions, Genetic, Transcription Factors, Transcription, Genetic, Down-Regulation, Gene Expression Regulation, Developmental, DNA Methylation, Gene Silencing, Cellular Reprogramming

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