title: Urinary excretion rates of 8-oxoGua and 8-oxodG and antioxidant vitamins level as a measure of oxidative status in healthy, full-term newborns.
abstract: The aim of the present study was to evaluate the oxidative status in healthy full-term children and piglets. Urinary excretion of 8-oxoGua (8-oxoguanine) and 8-oxodG (8-oxo-2'-deoxyguanosine) were determined using HPLC/GS/MS methodology and concentrations of vitamins A, C and E with HPLC technique. The levels of 8-oxoGua in urine samples were about 7-8 times higher in newborn children and piglets when compared with the level of adult subjects, while in the case of 8-oxodG the difference was about 2.5 times. The levels of vitamin C and E in umbilical cord blood of newborn children significantly depend on the concentration of these compounds in their mother's blood. However, the values of vitamin C in human's cord blood were about 2-times higher than in respective mother blood, while the level of vitamin E showed an opposite trend. The results suggest that: (i) healthy, full-term newborns are under potential oxidative stress; (ii) urinary excretion of 8-oxoGua and 8-oxodG may be a good marker of oxidative stress in newborns; and (iii) antioxidant vitamins, especially vitamin C, play an important role in protecting newborns against oxidative stress.
authors.affiliation: Department of Clinical Biochemistry, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland.
authors.forename: Tomasz
authors.initials: T
authors.lastname: Dziaman
authors.forename: Daniel
authors.initials: D
authors.lastname: Gackowski
authors.forename: Rafal
authors.initials: R
authors.lastname: Rozalski
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Siomek
authors.forename: Jaroslaw
authors.initials: J
authors.lastname: Szulczynski
authors.forename: Romuald
authors.initials: R
authors.lastname: Zabielski
authors.forename: Ryszard
authors.initials: R
authors.lastname: Olinski
mesh_terms: D000080242:8-Hydroxy-2'-Deoxyguanosine; D000818:Animals; D000831:Animals, Newborn; D000975:Antioxidants / Q000032:analysis; D001205:Ascorbic Acid / Q000652:urine*; D015415:Biomarkers / Q000652:urine; D002851:Chromatography, High Pressure Liquid; D003849:Deoxyguanosine / Q000031:analogs & derivatives* / Q000652:urine; D005260:Female; D006147:Guanine / Q000031:analogs & derivatives* / Q000652:urine; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D013058:Mass Spectrometry; D018384:Oxidative Stress; D013552:Swine; D014810:Vitamin E / Q000652:urine*
chemical_list: D000975:Antioxidants; D015415:Biomarkers; D014810:Vitamin E; C024829:8-hydroxyguanine; D006147:Guanine; D000080242:8-Hydroxy-2'-Deoxyguanosine; D003849:Deoxyguanosine; D001205:Ascorbic Acid