title: Glutathione peroxidase, glutathione-S-transferase, catalase, xanthine oxidase, Cu-Zn superoxide dismutase activities, total glutathione, nitric oxide, and malondialdehyde levels in erythrocytes of patients with small cell and non-small cell lung cancer.
abstract: Lung cancer is a common pathology with high mortality due to late diagnosis. Glutathione peroxidase (GSH-Px), glutathione-S-transferase (GST), catalase (CAT), xanthine oxidase (XO), Cu-Zn superoxide dismutase (Cu-Zn SOD) activities, total glutathione (TGSH), nitric oxide (NO*), and malondialdehyde (MDA) levels were investigated in erythrocytes of patients with non-small-cell lung cancer (NSCLC) and small-cell lung cancer (SCLC), and healthy control group. We aimed to investigate serum GSH, GSH-dependent enzymes activities (GSH-Px and GST), XO, CAT, Cu-Zn SOD activity, and NO*, and MDA levels in patients with NSCLC and with SCLC and correlate with the cancer stage. Erythrocyte MDA, NO*, TGSH levels and erythrocyte SOD, CAT and XO activities were significantly higher in patients with NSCLC and SCLC than in controls. Slightly increased erythrocyte GSH-Px and GST activities were not significantly different from the controls. Erythrocyte MDA level positively correlated with erythrocyte NO* levels in patients with early stage (I+II) in NSCLC groups. Erythrocyte MDA level positively correlated with erythrocyte XO activity in patients with advanced stage (III+IV) in NSCLC groups. However, no other correlation could be found among the parameters in healthy controls and patients with NSCLC and with SCLC. Results obtained in this study indicate significant changes in antioxidant defence system in NSCLC and SCLC patients, which may lead to enhanced action of oxygen radical, resulting in lipid peroxidation.
authors.affiliation: Department of Chest Diseases, Ataturk University, Medical School, 25240 Erzurum, Turkey.
authors.forename: Hasan
authors.initials: H
authors.lastname: Kaynar
authors.forename: Mehmet
authors.initials: M
authors.lastname: Meral
authors.forename: Hamdullah
authors.initials: H
authors.lastname: Turhan
authors.forename: Mustafa
authors.initials: M
authors.lastname: Keles
authors.forename: Gulnaz
authors.initials: G
authors.lastname: Celik
authors.forename: Fatih
authors.initials: F
authors.lastname: Akcay
mesh_terms: D000328:Adult; D000368:Aged; D002289:Carcinoma, Non-Small-Cell Lung / Q000097:blood*; D018288:Carcinoma, Small Cell / Q000097:blood*; D016022:Case-Control Studies; D002374:Catalase / Q000378:metabolism; D004912:Erythrocytes / Q000201:enzymology*; D005260:Female; D005978:Glutathione / Q000378:metabolism*; D005979:Glutathione Peroxidase / Q000378:metabolism; D005982:Glutathione Transferase / Q000378:metabolism; D006801:Humans; D015227:Lipid Peroxidation; D008175:Lung Neoplasms / Q000097:blood*; D008297:Male; D008315:Malondialdehyde / Q000378:metabolism*; D008875:Middle Aged; D009569:Nitric Oxide / Q000378:metabolism*; D018384:Oxidative Stress; D010088:Oxidoreductases / Q000378:metabolism*; D013482:Superoxide Dismutase / Q000378:metabolism; D017392:Thiobarbituric Acid Reactive Substances; D014969:Xanthine Oxidase / Q000378:metabolism
chemical_list: D017392:Thiobarbituric Acid Reactive Substances; D009569:Nitric Oxide; D008315:Malondialdehyde; D010088:Oxidoreductases; D002374:Catalase; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D014969:Xanthine Oxidase; D005982:Glutathione Transferase; D005978:Glutathione