title: Antioxidant system activation in prostate cancer.
abstract: The activities of glutathione peroxidase (GSH-Px) and superoxide dismutase (SOD) and the levels of copper, zinc, and malondialdehyde were determined in 21 age-, sex-, and body-mass-index-matched prostate cancer patients; 50 patients diagnosed with benign prostatic obstruction (BPO) were compared to 50 healthy male subjects acting as controls. The patients were divided into two groups depending on the stage of the disease (group 1 [organ-confined] and group II [advanced disease]) and into three subgroups according to differentiation criteria: subgroup A (n = 5, Gleason sum 2-4, well differentiated); subgroup B (n = 9, Gleason sum 5-7, moderately differentiated), and subgroup C (n = 7, Gleason sum 8-10, poorly differentiated). The MDA levels were higher and the antioxidant activity and Zn levels lower in the prostate cancer groups than in the healthy control and BPO groups. These results confirm the value of therapies aimed at increasing the antioxidant capacity and encourage the use of plasma and erythrocyte Zn levels in the differential diagnosis of BPO and prostate cancer. The MDA levels can be used in the diagnosis and follow-up of prostate cancer.
authors.affiliation: Department of Internal Medicine, Gulhane Military Medical Academy, Etlik-Ankara, Turkey.
authors.forename: M I
authors.initials: MI
authors.lastname: Yilmaz
authors.forename: K
authors.initials: K
authors.lastname: Saglam
authors.forename: A
authors.initials: A
authors.lastname: Sonmez
authors.forename: D E
authors.initials: DE
authors.lastname: Gok
authors.forename: S
authors.initials: S
authors.lastname: Basal
authors.forename: S
authors.initials: S
authors.lastname: Kilic
authors.forename: C
authors.initials: C
authors.lastname: Akay
authors.forename: I H
authors.initials: IH
authors.lastname: Kocar
mesh_terms: D000368:Aged; D000975:Antioxidants / Q000378:metabolism*; D003300:Copper / Q000097:blood; D005260:Female; D005979:Glutathione Peroxidase / Q000097:blood / Q000378:metabolism; D006801:Humans; D008297:Male; D008315:Malondialdehyde / Q000032:analysis / Q000097:blood; D008875:Middle Aged; D009367:Neoplasm Staging; D011471:Prostatic Neoplasms / Q000201:enzymology / Q000378:metabolism*; D013482:Superoxide Dismutase / Q000097:blood / Q000378:metabolism; D015032:Zinc / Q000097:blood*
chemical_list: D000975:Antioxidants; D008315:Malondialdehyde; D003300:Copper; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D015032:Zinc