title: Imaging techniques used for the detection of 8-oxoguanine adducts and DNA repair proteins in cells and tissues.
abstract: The presence of 8-oxoguanine (8-oxoG) in DNA is considered a marker of oxidative stress and DNA damage. Numerous biochemical techniques have been described for its detection in cells or tissues. Although these approaches are quantitative, they do not provide insights into whether the lesion occurs in mitochrondrial versus genomic DNA. In addition, biochemical techniques are not amenable to the evaluation of individual cells or archival tissues. Antibodies have been raised against 8-oxoG, which may circumvent some of these issues. In this review, we described the use of in situ imaging techniques to detect oxidative DNA damage including the comet assay. We will review our previous work that describes the utility of an antibody fragment (Fab) engineered to recognize 8-oxoG in DNA. Furthermore, we will discuss the analysis of DNA repair enzymes in the assessment of oxidative DNA damage. Finally, advantages and potential concerns associated with immunodetection of 8-oxoG are discussed.
authors.affiliation: University of Vermont College of Medicine, Department of Pathology, Burlington, Vermont, VT 05405, USA.
authors.forename: R L
authors.initials: RL
authors.lastname: Persinger
authors.forename: R
authors.initials: R
authors.lastname: Melamede
authors.forename: I
authors.initials: I
authors.lastname: Bespalov
authors.forename: S
authors.initials: S
authors.lastname: Wallace
authors.forename: D J
authors.initials: DJ
authors.lastname: Taatjes
authors.forename: Y
authors.initials: Y
authors.lastname: Janssen-Heininger
mesh_terms: D000818:Animals; D018736:DNA Adducts / Q000032:analysis*; D004260:DNA Repair; D006147:Guanine / Q000031:analogs & derivatives* / Q000032:analysis*; D006801:Humans
chemical_list: D018736:DNA Adducts; C024829:8-hydroxyguanine; D006147:Guanine