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Chemotherapy-induced neuronal DNA damage: an intriguing toolbox to elucidate DNA repair mechanisms in the brain

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Abstract

The accumulation of DNA damage and subsequent decline in cellular functions are significant factors contributing to aging and-age associated neurodegeneration. Mutations in the genes involved in DNA repair pathways have been linked to premature aging and age-related neurodegeneration. Although DNA repair mechanisms are remarkably preserved across species, our current knowledge of neuronal-specific DNA repair pathways largely stems from investigations carried out on cellular and animal models, mainly focusing on cancer-related research. While DNA repair mechanisms are generally efficient in correcting damage caused by internal and external sources, the regulation of these mechanisms in post-mitotic neuronal cells, which are non-dividing, is not well understood. Studies utilizing autopsy brain samples have identified specific types of DNA damage and repair proteins in human neurons. However, these findings are inadequate to fully understand the regulatory aspects of neuronal-specific DNA repair pathways. This understanding is crucial for developing mechanism-based drugs that can prevent neuronal cell death, a characteristic feature of neurodegenerative diseases. As a result, further research is required to understand the intricate regulation of the DNA repair mechanisms involved in maintaining genome integrity in neurons. Several chemotherapeutic drugs cause DNA damage or impede cell division and cell death. Drugs that are primarily known to induce DNA damage in dividing cells can also damage neuronal DNA. In this context, we propose that it may be worthwhile to consider the DNA damage response induced by chemotherapy in cancer survivors as a tool to understand definite neuronal DNA repair mechanisms.

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Data availability

All the raw data generated in this study are available from corresponding authors on request.

Abbreviations

NDD:

Neurodegenerative diseases

AD:

Alzheimer's disease

PD:

Parkinson's disease

HD:

Huntington's disease

ALS:

Amyotrophic lateral sclerosis

FTD:

Frontotemporal dementia

DDR:

DNA damage response

HR:

Homologous recombination

NHEJ:

Non-homologous end joining

BER:

Base excision repair

NER:

Nucleotide excision repair

SSB:

Single-strand breaks

DSB:

Double-strand breaks

APE1:

Apurinic/apyrimidinic endonucleases 1

8-oxoG:

8-Oxoguanosine

8-OHdG:

8-Hydroxydeoxyguanosine

PARP-1:

Poly-(ADP-ribose) polymerase 1

AT:

Ataxia telangiectasia

ATM:

Ataxia telangiectasia mutated

XP:

Xeroderma pigmentosum

CS:

Cockayne’s syndrome

TLS:

Translesion synthesis

PLA2G6:

Phospholipase A2 gene

CICI:

Chemotherapy-induced cognitive impairment

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Acknowledgements

The authors thank Dr. Srinivas Gopala, Dr. Cibin T Raghavan, and all other members of the Department of Biochemistry, SCTIMST, for constant discussion and inputs during the preparation of this review article.

Funding

No extramural funding was received for this study.

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Correspondence to Madhusoodanan Urulangodi.

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The authors declare that they have no conflicts of interest.

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Babu, A., Urulangodi, M. Chemotherapy-induced neuronal DNA damage: an intriguing toolbox to elucidate DNA repair mechanisms in the brain. GENOME INSTAB. DIS. 4, 315–332 (2023). https://doi.org/10.1007/s42764-023-00110-8

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  • DOI: https://doi.org/10.1007/s42764-023-00110-8

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