title: Erythrocyte superoxide dismutase and glutathione peroxidase activities, and malondialdehyde and reduced glutathione levels in schizophrenic patients.
abstract: There is abundant evidence that free radicals are involved in membrane pathology in the central nervous system and that they may play a role in neuropsychiatric disorders, including schizophrenia. In this study, we investigated erythrocyte superoxide dismutase and glutathione peroxidase activities as antioxidant enzymes, malondialdehydes as a sign of lipid peroxidation, and reduced glutathione levels in schizophrenic patients. Activities of superoxide dismutase and levels of malondialdehyde in erythrocytes were greater in all patients (n=48) and in patients with acute (n=16) and chronic schizophrenia (n=32) (p<0.001 for all patients and chronic patient group; p<0.05 for acute patient group). The activities of glutathione peroxidase were lower in patients (p<0.05 for all patients and acute patient group; p=0.051 for chronic patient group) compared with the control group. Mean erythrocyte reduced glutathione was lower in patients than in controls (p<0.05). In the patient group, erythrocyte superoxide dismutase activity was positively correlated with scales and duration of disease and erythrocyte malondialdehyde concentration. These data reveal that antioxidative defense mechanisms might be impaired in schizophrenic patients.
authors.affiliation: Department of Biochemistry, School of Medicine, Atatürk University, Erzurum, Turkey.
authors.forename: I
authors.initials: I
authors.lastname: Altuntas
authors.forename: H
authors.initials: H
authors.lastname: Aksoy
authors.forename: I
authors.initials: I
authors.lastname: Coskun
authors.forename: A
authors.initials: A
authors.lastname: Cayköylü
authors.forename: F
authors.initials: F
authors.lastname: Akçay
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D016022:Case-Control Studies; D004912:Erythrocytes / Q000201:enzymology*; D005260:Female; D005609:Free Radicals; D005978:Glutathione / Q000097:blood*; D005979:Glutathione Peroxidase / Q000097:blood*; D006801:Humans; D008297:Male; D008315:Malondialdehyde / Q000097:blood*; D008875:Middle Aged; D012559:Schizophrenia / Q000097:blood* / Q000188:drug therapy; D013482:Superoxide Dismutase / Q000097:blood*; D013997:Time Factors
chemical_list: D005609:Free Radicals; D008315:Malondialdehyde; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D005978:Glutathione