title: Assessment of DNA oxidation and antioxidant activity in hypertensive patients with chronic kidney disease.
abstract: The aim of this study was to evaluate the oxidative DNA damage, antioxidant activity, and effects of antihypertensive drugs on oxidative stress in hypertensive patients with different stages of chronic kidney disease (CKD). Fifty-three non-dialyzed hypertensive CKD patients were included by the study. Serum and urinary 8-hydroxydeoxy guanosine (8-OHdG) levels (as a marker of oxidative DNA damage), serum superoxide dismutase (SOD), and glutathione peroxidase (G-Px) activities (as antioxidant enzymes) were measured. SOD activity was higher and G-Px activity was lower in the patient group as compared to control group. Serum and urinary 8-OHdG levels were found to be higher in the patients with proteinuria greater than 3 g/day than those in the patients with proteinuria less than 3 g/day. It has been determined that G-Px activity and urinary 8-OHdG level were lower in the patients treated with angiotensin-converting enzyme (ACE) inhibitor compared to patients treated with calcium channel blocker. The present data show oxidative DNA damage at a higher level in the patients with proteinuria greater than 3 g/day. In comparison to a calcium channel blocker, an ACE inhibitor seems much more protective against oxidative DNA damage in hypertensive patients with different stages of CKD.
authors.affiliation: Department of Biochemistry, Istanbul University Cerrahpasa Medical Faculty, Istanbul, Turkey. stare63@yahoo.com
authors.forename: Yildiz
authors.initials: Y
authors.lastname: Dincer
authors.forename: Nigar
authors.initials: N
authors.lastname: Sekercioglu
authors.forename: Meltem
authors.initials: M
authors.lastname: Pekpak
authors.forename: Kezban N
authors.initials: KN
authors.lastname: Gunes
authors.forename: Tulay
authors.initials: T
authors.lastname: Akcay
mesh_terms: D000080242:8-Hydroxy-2'-Deoxyguanosine; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000959:Antihypertensive Agents / Q000627:therapeutic use; D004249:DNA Damage; D003849:Deoxyguanosine / Q000031:analogs & derivatives* / Q000097:blood / Q000652:urine; D005260:Female; D005979:Glutathione Peroxidase / Q000097:blood*; D006801:Humans; D006973:Hypertension / Q000097:blood* / Q000188:drug therapy / Q000652:urine; D007676:Kidney Failure, Chronic / Q000097:blood* / Q000188:drug therapy / Q000652:urine; D008297:Male; D008875:Middle Aged; D018384:Oxidative Stress; D013482:Superoxide Dismutase / Q000097:blood*; D055815:Young Adult
chemical_list: D000959:Antihypertensive Agents; D000080242:8-Hydroxy-2'-Deoxyguanosine; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D003849:Deoxyguanosine