title: Protein and DNA oxidation in different anatomic regions of rat brain in a mimetic ageing model.
abstract: It has been reported that d-galactose administration causes an increase in oxidative and osmotic stresses in several tissues of rodents. In this study, we established a brain ageing model by using d-galactose and investigated the concentrations of oxidative stress markers on the hippocampus, parietal and frontal lobes of male Sprague-Dawley rats. A mimetic ageing model was established by injecting d-galactose (60 mg/kg/day/i.p.) in the experimental group for 42 days. At the end of this period, we tested spatial memory using the Morris water maze test. To investigate the magnitude of oxidative damage in proteins, lipids and DNA, we studied the concentrations of various oxidative stress parameters in the hippocampus, parietal and frontal lobes of the brain. Glial and neuronal cell oxidative damage was observed in each of the three anatomic regions. It was found that protein carbonyl groups and advanced oxidation product concentrations in the d-galactose applied group were significantly high in each of the three brain lobes compared with the control group. Thiol concentration was found to be decreased in the parietal lobe. A concurrent increase in lipid hydroperoxides was also observed in this lobe. On the other hand, 8-hydroxy-2'-deoxyguanosine concentration was significantly increased in the hippocampal lobe of rats in the experimental group when compared with the controls. The results obtained from the mimetic ageing model rats showed that various anatomical regions of brain have different susceptibility to oxidative damage of proteins, lipids and DNA.
authors: Department of Biochemistry, Istanbul University, Turkey.
authors: Karolin
authors: K
authors: Yanar
authors: Seval
authors: S
authors: Aydın
authors: Ufuk
authors: U
authors: Cakatay
authors: Murat
authors: M
authors: Mengi
authors: Nur
authors: N
authors: Buyukpınarbaşılı
authors: Pınar
authors: P
authors: Atukeren
authors: Mustafa E
authors: ME
authors: Sitar
authors: Aslı
authors: A
authors: Sönmez
authors: Ezel
authors: E
authors: Uslu
mesh_terms: D000080242:8-Hydroxy-2'-Deoxyguanosine; D000375:Aging / Q000187:drug effects / Q000235:genetics / Q000378:metabolism*; D000818:Animals; D015415:Biomarkers / Q000378:metabolism; D001921:Brain / Q000187:drug effects / Q000378:metabolism* / Q000473:pathology; D004249:DNA Damage; D003849:Deoxyguanosine / Q000031:analogs & derivatives / Q000378:metabolism; D004195:Disease Models, Animal; D005625:Frontal Lobe / Q000187:drug effects / Q000378:metabolism / Q000473:pathology; D005690:Galactose / Q000008:administration & dosage / Q000494:pharmacology; D006624:Hippocampus / Q000187:drug effects / Q000378:metabolism / Q000473:pathology; D015227:Lipid Peroxidation / Q000187:drug effects; D008054:Lipid Peroxides / Q000378:metabolism; D008297:Male; D018782:Maze Learning / Q000187:drug effects; D010084:Oxidation-Reduction; D018384:Oxidative Stress / Q000187:drug effects; D010296:Parietal Lobe / Q000187:drug effects / Q000378:metabolism / Q000473:pathology; D050050:Protein Carbonylation; D011506:Proteins / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley; D013037:Spatial Behavior / Q000187:drug effects; D013438:Sulfhydryl Compounds / Q000378:metabolism
chemical_list: D015415:Biomarkers; D008054:Lipid Peroxides; D011506:Proteins; D013438:Sulfhydryl Compounds; D000080242:8-Hydroxy-2'-Deoxyguanosine; D003849:Deoxyguanosine; D005690:Galactose