Cited by 121DNA Repair MechanismsDNA and Nucleic Acid ChemistryGenetics, Aging, and Longevity in Model Organisms

Incorporation of a nucleoside analog maps genome repair sites in postmitotic human neurons

Open access
Reid, Dylan A., Reed, Patrick J., Schlachetzki, Johannes C. M., Nitulescu, Ioana I., Chou, Grace, Tsui, Enoch C., Jones, Jeffrey R., Chandran, Sahaana +14 more·2021·Science

Abstract

Neurons are the longest-lived cells in our bodies and lack DNA replication, which makes them reliant on a limited repertoire of DNA repair mechanisms to maintain genome fidelity. These repair mechanisms decline with age, but we have limited knowledge of how genome instability emerges and what strategies neurons and other long-lived cells may have evolved to protect their genomes over the human life span. A targeted sequencing approach in human embryonic stem cell-induced neurons shows that, in neurons, DNA repair is enriched at well-defined hotspots that protect essential genes. These hotspots are enriched with histone H2A isoforms and RNA binding proteins and are associated with evolutionarily conserved elements of the human genome. These findings provide a basis for understanding genome integrity as it relates to aging and disease in the nervous system.

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Registry

Crossref · 10.1126/science.abb9032

Cites

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  • The process of BER erasing oxidative damaged bases and cytosine methylation could lead to base mutations.

    “This process promotes extensive endogenous DNA damage in neuronal enhancers, safeguards cell identities but could also lead to base mutations12–15.”

    From Single-cell parallel analysis of DNA damage and transcriptome reveals selective genome vulnerability (2025) · cites this paper as [13]

    The paper’s discussion of DNA repair hotspots (section labeled Abstract; page unavailable) says they are linked to neuronal identity and may protect essential elements from erroneous repair. It does not establish that BER removes oxidative damage or cytosine methylation in neuronal enhancers, or that this process leads to base mutations; its comparison found no enrichment of single-nucleotide variants near repair hotspots. (LLM, conf=0.78)

    Experimental — accuracy not yet measured
  • The process of BER erasing oxidative damaged bases and cytosine methylation promotes extensive endogenous DNA damage in neuronal enhancers.

    “This process promotes extensive endogenous DNA damage in neuronal enhancers, safeguards cell identities but could also lead to base mutations12–15.”

    From Single-cell parallel analysis of DNA damage and transcriptome reveals selective genome vulnerability (2025) · cites this paper as [13]

    The paper’s Repair-seq findings (Fig. 1D and Fig. 2A) identify numerous DNA-repair hotspots in induced human neurons, some in open chromatin and active regulatory regions. It does not establish that base-excision repair of oxidative damage or cytosine methylation causes extensive damage specifically in neuronal enhancers; its discussion of mutations reports no enrichment near the hotspots (Fig. 4A). (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • The process of BER erasing oxidative damaged bases and cytosine methylation safeguards cell identities.

    “This process promotes extensive endogenous DNA damage in neuronal enhancers, safeguards cell identities but could also lead to base mutations12–15.”

    From Single-cell parallel analysis of DNA damage and transcriptome reveals selective genome vulnerability (2025) · cites this paper as [13]

    In the indexed paper’s Abstract-labeled text (no page given), DNA repair hotspots are associated with genes essential for neuronal identity, and the authors suggest that the hotspots might protect essential elements from erroneous or absent repair. The copy does not identify this process as BER erasing oxidatively damaged bases or cytosine methylation, nor does it establish that the process promotes extensive endogenous damage in neuronal enhancers. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • DNA repair hotspots are enriched in a subset of regulatory regions including enhancers, to protect the identities and functions of postmitotic cells (such as neurons).

    “Recent studies revealed that DNA repair hotspots are enriched in a subset of regulatory regions including enhancers, to protect the identities and functions of postmitotic cells (such as neurons)12,13,15.”

    From Single-cell parallel analysis of DNA damage and transcriptome reveals selective genome vulnerability (2025) · cites this paper as [13]

    The copy reports that about 23.5% of DNA repair hotspots in induced human neurons overlap open chromatin or active regulatory regions, and says the hotspots may play a role in neuronal identity and function (section labeled Abstract; page unavailable). It identifies promoter enrichment but does not establish enhancer enrichment, and it leaves open whether the findings extend to other postmitotic cells. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • The observed DNA damage hotspots are combined results from DNA damage formation and repair.

    “Moreover, the observed DNA damage hotspots are combined results from DNA damage formation and repair12,13.”

    From Single-cell parallel analysis of DNA damage and transcriptome reveals selective genome vulnerability (2025) · cites this paper as [13]

    The paper’s Abstract describes the hotspots as peaks of EdU incorporation that map DNA repair synthesis. It also reports that a DNA-damaging treatment changed which hotspots were detected, consistent with damage formation affecting the observed pattern. It does not establish that the baseline hotspots are combined results of damage formation and repair. (LLM, conf=0.78)

    Experimental — accuracy not yet measured

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Cites

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Research works printed but not linked: 4

  1. [17]Pruunsil P, Bengtson CP, Bading H, Cell Rep. 18, 122– 135 (2017). 28052243 PMC5236011
  2. [19]Hänsel-Hertsch R., Nat. Genet 48, 1267– 1272 (2016). 27618450
  3. [21]López-Otín C, Blasco MA, Partridge L, Serrano M, Kroemer G, Cell 153, 1194– 1217 (2013). 23746838 PMC3836174
  4. [25]Wu W., bioRxiv 2020.12.16.423085 [Preprint].

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Authors
Reid, D. A., Reed, P. J., Schlachetzki, J. C. M., Nitulescu, I. I., Chou, G., Tsui, E. C., Jones, J. R., Chandran, S., Lu, A. T., McClain, C. A., Ooi, J. H., Wang, T.-W., Lana, A. J., Linker, S. B., Ricciardulli, A. S., Lau, S., Schafer, S. T., Horvath, S., Dixon, J. R., Hah, N., Glass, C. K., & Gage, F. H.
Affiliations
  • Salk Institute for Biological Studies (US)
  • University of California San Diego (US)
  • University of California, Los Angeles (US)
Corresponding author
  • Reid, Dylan A.
  • Reed, Patrick J.
  • Schlachetzki, Johannes C. M.
  • Nitulescu, Ioana I.
  • Chou, Grace
  • Tsui, Enoch C.
  • Jones, Jeffrey R.
  • Gage, Fred H.
Venue
Science
Published
2021-04-02
Volume
372
Issue
6537
Pages
91-94
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W3151212872
Cited by
121
References
81
Citations by year
2026: 18 · 2025: 19 · 2024: 24 · 2023: 26 · 2022: 27 · 2021: 7
FWCI
6.59
Type
journal article
Language
en
Open access
Licence
cc-by-nc
Locations
  • Science (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • NIH Office of the Director (AG056306, DP5OD023071-03)
  • Alzheimer’s Association (AARF-17-504089)
  • Leona M. and Harry B. Helmsley Charitable Trust
  • JPB Foundation
  • NIH (R01AG056411-02)
  • American Heart Association/Paul G. Allen Frontiers Group Brain Health & Cognitive Impairment Initiative (19PABHI34610000)
  • Dolby Charitable Trust
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
DNA repair, genomic instability, postmitotic neurons, RNA-binding proteins, embryonic stem cell-derived neurons, aging, genome stability, essential genes
MeSH terms
Aging, Deoxyuridine, DNA Damage, DNA Repair, Histones, Humans, Mitosis, Mutation, Nervous System Diseases, Neurons, Promoter Regions, Genetic, Transcription, Genetic, Genome, Human, RNA-Binding Proteins, Sequence Analysis, DNA, DNA, Intergenic, Genomic Instability, Embryonic Stem Cells

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