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Mutat Res. 2015 Jun;776:31-9. doi: 10.1016/j.mrfmmm.2014.12.011. Epub 2015 Jan 4.

The impact of base excision DNA repair in age-related neurodegenerative diseases.

Author information

1
Laboratory of Molecular Gerontology, National Institute on Aging, Intramural Research Program (NIA IRP), Biomedical Research Center, 251 Bayview Blvd., Baltimore, MD 21224, United States; Department of Genetics, Ribeirao Preto Medical School, University of Sao Paulo, Avenida Bandeirantes, 3900, Ribeirao Preto, SP 14049-900, Brazil.
2
Laboratory of Molecular Gerontology, National Institute on Aging, Intramural Research Program (NIA IRP), Biomedical Research Center, 251 Bayview Blvd., Baltimore, MD 21224, United States. Electronic address: sykorap@mail.nih.gov.
3
Laboratory of Molecular Gerontology, National Institute on Aging, Intramural Research Program (NIA IRP), Biomedical Research Center, 251 Bayview Blvd., Baltimore, MD 21224, United States. Electronic address: bohrv@grc.nia.nih.gov.

Abstract

The aging process and several age-related neurodegenerative disorders have been linked to elevated levels of DNA damage induced by ROS and deficiency in DNA repair mechanisms. DNA damage induced by ROS is a byproduct of cellular respiration and accumulation of damage over time, is a fundamental aspect of a main theory of aging. Mitochondria have a pivotal role in generating cellular oxidative stress, and mitochondrial dysfunction has been associated with several diseases. DNA base excision repair is considered the major pathway for repair of oxidized bases in DNA both in the nuclei and in mitochondria, and in neurons this mechanism is particularly important because non-diving cells have limited back-up DNA repair mechanisms. An association between elevated oxidative stress and a decrease in BER is strongly related to the aging process and has special relevance in age-related neurodegenerative diseases. Here, we review the role of DNA repair in aging, focusing on the implications of the DNA base excision repair pathways and how alterations in expression of these DNA repair proteins are related to the aging process and to age-related neurodegenerative diseases.

KEYWORDS:

Aging; Alzheimers disease; DNA repair; Neurodegeneration; Oxidative damage; Oxidative stress

PMID:
26255938
PMCID:
PMC5576886
DOI:
10.1016/j.mrfmmm.2014.12.011
[Indexed for MEDLINE]
Free PMC Article

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