BACKGROUND/AIMS: Chronic renal patients on hemodialysis (HD) and peritoneal dialysis (PD) treatment are exposed to oxidative stress and DNA damage. The objective of this study was to assess the oxidative damage to DNA in end-stage chronic renal failure, before and after vitamin E supplementation. METHODS: Patients on HD (n=29) and PD (n=22) received oral supplementation with 300 mg vitamin E three times a week for 4 weeks. A blood sample was collected at the beginning and at the end of the supplementation cycle for the determination of vitamin E levels (high-performance liquid chromatography), carbonyl groups, and DNA damage (8-hydroxy 2'-deoxyguanosine [8-OHdG] and comet assay). RESULTS: After supplementation, vitamin E concentration was increased by about 50%. Protein oxidation was initially observed in both groups, with a reduction after supplementation. DNA damage detected by the comet assay and by 8-OHdG analysis was significantly reduced (p<0.05) after supplementation in both groups. CONCLUSIONS: Vitamin E supplementation reduced oxidative DNA damage in both HD and PD patients. Treatments such as HD and PD induce oxidative stress and consequent DNA damage, and increased plasma vitamin E levels significantly contribute to the normalization of these events.
BACKGROUND/AIMS: Chronic renalpatients on hemodialysis (HD) and peritoneal dialysis (PD) treatment are exposed to oxidative stress and DNA damage. The objective of this study was to assess the oxidative damage to DNA in end-stage chronic renal failure, before and after vitamin E supplementation. METHODS:Patients on HD (n=29) and PD (n=22) received oral supplementation with 300 mg vitamin E three times a week for 4 weeks. A blood sample was collected at the beginning and at the end of the supplementation cycle for the determination of vitamin E levels (high-performance liquid chromatography), carbonyl groups, and DNA damage (8-hydroxy 2'-deoxyguanosine [8-OHdG] and comet assay). RESULTS: After supplementation, vitamin E concentration was increased by about 50%. Protein oxidation was initially observed in both groups, with a reduction after supplementation. DNA damage detected by the comet assay and by 8-OHdG analysis was significantly reduced (p<0.05) after supplementation in both groups. CONCLUSIONS:Vitamin E supplementation reduced oxidative DNA damage in both HD and PDpatients. Treatments such as HD and PD induce oxidative stress and consequent DNA damage, and increased plasma vitamin E levels significantly contribute to the normalization of these events.
Authors: Andrzej R Trzeciak; Joy G Mohanty; Kimberly D Jacob; Janice Barnes; Ngozi Ejiogu; Althaf Lohani; Alan B Zonderman; Joseph M Rifkind; Michele K Evans Journal: Mutat Res Date: 2012-01-18 Impact factor: 2.433
Authors: Tina Oberacker; Peter Fritz; Moritz Schanz; Mark Dominik Alscher; Markus Ketteler; Severin Schricker Journal: Antioxidants (Basel) Date: 2022-06-06
Authors: Georgios Boudouris; Ioannis I Verginadis; Yannis V Simos; Andreas Zouridakis; Vasilios Ragos; Spyridon Ch Karkabounas; Angelos M Evangelou Journal: Int Urol Nephrol Date: 2012-12-02 Impact factor: 2.370