Urinary 8-oxo-2′-deoxyguanosine:Redox regulation of DNA repair in vivo?

Lunec, Joseph; Holloway, Karen A.; Cooke, Marcus S.; Faux, Steve; Griffiths, Helen R. and Evans, Mark D. (2002). Urinary 8-oxo-2′-deoxyguanosine:Redox regulation of DNA repair in vivo? Free Radical Biology and Medicine, 33 (7), pp. 875-885.

Abstract

DNA is susceptible to damage by reactive oxygen species (ROS). ROS are produced during normal and pathophysiological processes in addition to ionizing radiation, environmental mutagens, and carcinogens. 8-oxo-2′-deoxyguanosine (8-oxodG) is probably one of the most abundant DNA lesion formed during oxidative stress. This potentially mutagenic lesion causes G → T transversions and is therefore an important candidate lesion for repair, particularly in mammalian cells. Several pathways exist for the removal, or repair, of this lesion from mammalian DNA. The most established is via the base excision repair enzyme, human 8-oxoguanine glycosylase (hOgg1), which acts in combination with the human apurinic endonuclease (hApe). The latter is known to respond to regulation by redox reactions and may act in combination with hOgg1. We discuss evidence in this review article concerning alternative pathways in humans, such as nucleotide excision repair (NER), which could possibly remove the 8-oxodG lesion. We also propose that redox-active components of the diet, such as vitamin C, may promote such repair, affecting NER specifically. © 2002 Elsevier Science Inc.

Publication DOI: https://doi.org/10.1016/S0891-5849(02)00882-1
Divisions: ?? 39654700Jl ??
Life & Health Sciences
Life & Health Sciences > Applied Health Research Group
Life & Health Sciences > Biomedical Sciences research group
Related URLs:
Uncontrolled Keywords: antioxidants,ascorbic acid,cell signaling,DNA damage,DNA repair,free radicals,oxidative stress,Medicine(all),Toxicology,Clinical Biochemistry
Published Date: 2002-10

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