Systemic increase of oxidative nucleic acid damage in Parkinson's disease and multiple system atrophy.
8-hydroxy-2'-deoxyguanosine (8-OHdG) or 8-hydroxyguanosine (8-OHG), a product of oxidized DNA or RNA, is a good marker of oxidative cellular damage. In this study, we measured the 8-OHdG/8-OHG levels in the serum and cerebrospinal fluid (CSF) of patients with Parkinson's disease (PD) and multiple system atrophy (MSA). Compared to age-matched controls, the mean levels of serum 8-OHdG/8-OHG were significantly higher in PD (P < 0.0001). Although no gender differences were observed in the controls, the mean values of serum 8-OHdG/8-OHG were significantly higher in female PD cases (P < 0.005) than in male patients. 8-OHdG/8-OHG levels in CSF were also increased significantly in patients with PD and MSA, however, their relative values were generally much lower than those in the serum. Together with previous studies showing increased peripheral 8-OHdG levels in Alzheimer's disease and amyotrophic lateral sclerosis, the data presented here suggest that systemic DNA/RNA oxidation is commonly observed in neurodegenerative diseases. Our results also imply that female patients with PD show higher levels of oxidative stress, which may explain the faster progression of this disease in females.
Kikuchi
Akio
A
Department of Neurology, Tohoku University School of Medicine, Sendai, Japan.
Takeda
Atsushi
A
Onodera
Hiroshi
H
Kimpara
Teiko
T
Hisanaga
Kinya
K
Sato
Nobuyuki
N
Nunomura
Akihiko
A
Castellani
Rudy J
RJ
Perry
George
G
Smith
Mark A
MA
Itoyama
Yasuto
Y
D000080242:8-Hydroxy-2'-Deoxyguanosine; D000368:Aged; D015415:Biomarkers; D004247:DNA / Q000378:metabolism; D003849:Deoxyguanosine / Q000031:analogs & derivatives* / Q000097:blood / Q000134:cerebrospinal fluid; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006151:Guanosine / Q000031:analogs & derivatives* / Q000097:blood / Q000134:cerebrospinal fluid; D006801:Humans; D008297:Male; D008875:Middle Aged; D019578:Multiple System Atrophy / Q000378:metabolism* / Q000473:pathology*; D010084:Oxidation-Reduction; D018384:Oxidative Stress; D010300:Parkinson Disease / Q000378:metabolism* / Q000473:pathology*; D012313:RNA / Q000378:metabolism
D015415:Biomarkers; D006151:Guanosine; C046215:8-hydroxyguanosine; D012313:RNA; D000080242:8-Hydroxy-2'-Deoxyguanosine; D004247:DNA; D003849:Deoxyguanosine