Cited by 117Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchDNA Repair Mechanisms

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Contributions of DNA Damage to Alzheimer’s Disease

Open access
Lin, Xiaozeng, Kapoor, Anil, Gu, Yan, Chow, Mathilda Jing, Peng, Jingyi, Zhao, Kuncheng, Tang, Damu·2020·International Journal of Molecular Sciences

Abstract

Alzheimer’s disease (AD) is the most common type of neurodegenerative disease. Its typical pathology consists of extracellular amyloid-β (Aβ) plaques and intracellular tau neurofibrillary tangles. Mutations in the APP, PSEN1, and PSEN2 genes increase Aβ production and aggregation, and thus cause early onset or familial AD. Even with this strong genetic evidence, recent studies support AD to result from complex etiological alterations. Among them, aging is the strongest risk factor for the vast majority of AD cases: Sporadic late onset AD (LOAD). Accumulation of DNA damage is a well-established aging factor. In this regard, a large amount of evidence reveals DNA damage as a critical pathological cause of AD. Clinically, DNA damage is accumulated in brains of AD patients. Genetically, defects in DNA damage repair resulted from mutations in the BRAC1 and other DNA damage repair genes occur in AD brain and facilitate the pathogenesis. Abnormalities in DNA damage repair can be used as diagnostic biomarkers for AD. In this review, we discuss the association, the causative potential, and the biomarker values of DNA damage in AD pathogenesis.

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Crossref · 10.3390/ijms21051666

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Figure 1 Systemic literature search and selection of articles for review.
Figure 1 Systemic literature search and selection of articles for review.CC BY · PubMed Central
Figure 2 A model showing double strand break (DSB) repair pathways. For the homologous recombination (HR) and non-homologous end joining (NHEJ) pathways, DSBs are first recognized by either the MRN or Ku70/80 complex, followed by the recruitment of ATM or DNA-PKCS (the catalytic subunit of DNA-PK) as indicated. ATM and DNA-PK then phosphorylate H2AX at serine 139 to generate γH2AX (event 1), which initiates event 2: recruiting either BRCA1 or 53BP1; recruitment of either inhibits the recruitment of another. 53BP1: p53-binding protein 1; ATM: ataxia-telangiectasia mutated; BRCA1: breast cancer type 1 susceptibility protein; DSB: double strand DNA break; DNA-PK: DNA-dependent protein kinase; HR: homologous recombination; MRN: the complex of MRE11-NBS1-RAD50; NHEJ: non-homologous end joining.
Figure 2 A model showing double strand break (DSB) repair pathways. For the homologous recombination (HR) and non-homologous end joining (NHEJ) pathways, DSBs are first recognized by either the MRN or Ku70/80 complex, followed by the recruitment of ATM or DNA-PKCS (the catalytic subunit of DNA-PK) as indicated. ATM and DNA-PK then phosphorylate H2AX at serine 139 to generate γH2AX (event 1), which initiates event 2: recruiting either BRCA1 or 53BP1; recruitment of either inhibits the recruitment of another. 53BP1: p53-binding protein 1; ATM: ataxia-telangiectasia mutated; BRCA1: breast cancer type 1 susceptibility protein; DSB: double strand DNA break; DNA-PK: DNA-dependent protein kinase; HR: homologous recombination; MRN: the complex of MRE11-NBS1-RAD50; NHEJ: non-homologous end joining.CC BY · PubMed Central
Figure 3 An illustration demonstrating BER. ROS induces oxidized base lesion or SSB. The oxidized bases are removed by DNA glycosylase OGG1 and NHT1 or NEIL1 and NEIL2; the ends are then processed, followed by filling the gap with synthesis of a single nucleotide or 2-8 nucleotides; ligation via a ligase will then complete the repair. SSB was first recognized by PARP1; different ends produced by end processing are accordingly modified by the indicated proteins, followed by gap filling using either the SP-BER or the LP-BER pathway. APE-1: AP (apurine/apirimidine) endonuclease 1; APTX: ataxia with oculomotor apraxia; BER: base excision repair; dRP: 3’ phosphor-α,β-unsaturated aldehyde; FEN1: Figure 1. LIG: DNA ligase; NEIL1: Nei like DNA glycosylase 1; NEIL2: Nei like DNA glycosylase 2; NTH1: Nth like DNA glycosylase; OGG1: DNA glycosylase; PARP1: poly(ADP) ribose polymerase 1; PNKP: polynucleotide kinase phosphatase; POLβ: DNA polymerase β; ROS: reactive oxygen species; SSB: single strand DNA break; TDP1: tyrosyl-DNA phosphodiesterase 1; XRCC1: X-ray repair cross-complementing protein 1.
Figure 3 An illustration demonstrating BER. ROS induces oxidized base lesion or SSB. The oxidized bases are removed by DNA glycosylase OGG1 and NHT1 or NEIL1 and NEIL2; the ends are then processed, followed by filling the gap with synthesis of a single nucleotide or 2-8 nucleotides; ligation via a ligase will then complete the repair. SSB was first recognized by PARP1; different ends produced by end processing are accordingly modified by the indicated proteins, followed by gap filling using either the SP-BER or the LP-BER pathway. APE-1: AP (apurine/apirimidine) endonuclease 1; APTX: ataxia with oculomotor apraxia; BER: base excision repair; dRP: 3’ phosphor-α,β-unsaturated aldehyde; FEN1: Figure 1. LIG: DNA ligase; NEIL1: Nei like DNA glycosylase 1; NEIL2: Nei like DNA glycosylase 2; NTH1: Nth like DNA glycosylase; OGG1: DNA glycosylase; PARP1: poly(ADP) ribose polymerase 1; PNKP: polynucleotide kinase phosphatase; POLβ: DNA polymerase β; ROS: reactive oxygen species; SSB: single strand DNA break; TDP1: tyrosyl-DNA phosphodiesterase 1; XRCC1: X-ray repair cross-complementing protein 1.CC BY · PubMed Central
Figure 4 Summary of expression of the indicated BER genes in AD brains compared to age-matched controls. Arrows indicate upregulation and downregulation respectively. APE-1: AP (apurine/apirimidine) endonuclease 1; ND: no differences; OGG1: DNA glycosylase; PARP1: poly(ADP) ribose polymerase 1; and POLβ: DNA polymerase β.
Figure 4 Summary of expression of the indicated BER genes in AD brains compared to age-matched controls. Arrows indicate upregulation and downregulation respectively. APE-1: AP (apurine/apirimidine) endonuclease 1; ND: no differences; OGG1: DNA glycosylase; PARP1: poly(ADP) ribose polymerase 1; and POLβ: DNA polymerase β.CC BY · PubMed Central
Figure 5 An illustration shows the effects of CDK5 in regulating DNA repair in neurons. Arrows indicate enhancing (upward direction) and reducing (downward direction) the protein’s functions respectively. CDK5 activity towards ATM in neurons is likely via p25. APE-1: AP (apurine/apirimidine) endonuclease 1; ATM: ataxia-telangiectasia mutated; BER: base excision repair; CDK5: cyclin-dependent kinase 5.
Figure 5 An illustration shows the effects of CDK5 in regulating DNA repair in neurons. Arrows indicate enhancing (upward direction) and reducing (downward direction) the protein’s functions respectively. CDK5 activity towards ATM in neurons is likely via p25. APE-1: AP (apurine/apirimidine) endonuclease 1; ATM: ataxia-telangiectasia mutated; BER: base excision repair; CDK5: cyclin-dependent kinase 5.CC BY · PubMed Central

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Metadata

Authors
Lin, X., Kapoor, A., Gu, Y., Chow, M. J., Peng, J., Zhao, K., & Tang, D.
Affiliations
St. Joseph’s Healthcare Hamilton (CA)
Corresponding author
Tang, Damu
Venue
International Journal of Molecular Sciences
Publisher
MDPI AG
Published
2020-02-28
Volume
21
Issue
5
Pages
1666
ISSN
1422-0067 (ISSN-L)
OpenAlex
W3009111493
Cited by
117
References
241
Citations by year
2026: 15 · 2025: 19 · 2024: 22 · 2023: 18 · 2022: 19 · 2021: 16 · 2020: 5
FWCI
1.85
Type
journal article
Language
en
Open access
Locations
  • International Journal of Molecular Sciences (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Cancer Research Society (NA)
  • Canadian Cancer Society (319412)
  • Canadian Institutes of Health Research (NA)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
Keywords
Alzheimer's disease, DNA damage, DNA repair, aging, amyloid plaques, neurofibrillary tangles, BRCA1, familial Alzheimer's disease, late-onset Alzheimer's disease, diagnostic biomarkers, neurodegeneration
MeSH terms
Alzheimer Disease, DNA Damage, DNA Repair, Humans, Models, Biological, Risk Factors, Neurogenesis

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