title: Simultaneous measurement of 8-oxo-2'-deoxyguanosine and 8-oxo-2'-deoxyadenosine by HPLC-MS/MS.
abstract: An assay with high selectivity and sensitivity has been developed which, for the first time, allows quantitative, simultaneous measurement in DNA of both 8-oxo-2'-deoxyguanosine (8-oxodG) and 8-oxo-2'-deoxyadenosine (8-oxodA)-important biomarkers of oxidative DNA damage in vivo. Using reversed-phase HPLC coupled to electrospray tandem mass spectrometry (HPLC-MS/MS) in multiple reaction monitoring (MRM) mode it was possible to detect background levels of these lesions in commercially available calf thymus DNA (85 +/- 3 and 7.1 +/- 0.2 per 10(6) DNA bases for 8-oxodG and 8-oxodA respectively; n = 3). Levels of 8-oxodG determined by HPLC coupled to an electrochemical detection system (HPLC-EC) were found to be similar (75 +/- 6 per 10(6) DNA bases; n = 3) to those obtained using tandem mass spectrometry.
authors.affiliation: Oxidative Stress Group, Division of Chemical Pathology, Leicester, LE2 7LX, United Kingdom. idp@le.ac.uk
authors.forename: I D
authors.initials: ID
authors.lastname: Podmore
authors.forename: D
authors.initials: D
authors.lastname: Cooper
authors.forename: M D
authors.initials: MD
authors.lastname: Evans
authors.forename: M
authors.initials: M
authors.lastname: Wood
authors.forename: J
authors.initials: J
authors.lastname: Lunec
mesh_terms: D000080242:8-Hydroxy-2'-Deoxyguanosine; D000818:Animals; D002138:Calibration; D002417:Cattle; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004247:DNA / Q000032:analysis; D004249:DNA Damage; D003839:Deoxyadenosines / Q000032:analysis*; D003849:Deoxyguanosine / Q000031:analogs & derivatives* / Q000032:analysis*; D013058:Mass Spectrometry / Q000379:methods*; D010084:Oxidation-Reduction; D012015:Reference Standards; D013950:Thymus Gland / Q000737:chemistry
chemical_list: D003839:Deoxyadenosines; C078251:2'-deoxy-7,8-dihydro-8-oxoadenosine; D000080242:8-Hydroxy-2'-Deoxyguanosine; D004247:DNA; D003849:Deoxyguanosine