BACKGROUND/AIM: Indoxyl sulfate (IS) is a uremic toxin that accelerates the progression of chronic renal failure (CRF). This study aimed at determining whether IS impairs antioxidative systems (redox status) in the kidney. METHODS: IS was orally administered to normal and subtotally nephrectomized (three fourths and five sixths) rats (CRF rats) for 2 weeks. By use of in vivo and ex vivo electron spin resonance spectroscopy, the kidney redox status was evaluated using carbamoyl-PROXYL as a radical spin probe in living rats, and the kidney superoxide scavenging activity was measured. Immunohistochemistry of superoxide dismutase (SOD) in the kidney was performed. RESULTS: Administration of IS increased serum and kidney levels of IS and serum creatinine and decreased creatinine clearance. CRF rats showed reduced spin reduction rate, prolonged half-life of the spin probe, and reduced superoxide scavenging activity and SOD-positive areas in the kidney as compared with normal rats. Administration of IS further reduced radical spin reduction rate, prolonged half-life of the spin probe, and reduced superoxide scavenging activity and SOD-positive areas in the kidneys. CONCLUSIONS: Administration of IS reduced superoxide scavenging activity in the kidneys of normal and CRF rats. Thus, the nephrotoxicity of IS may be induced by impairing the antioxidative systems in the kidney. (c) 2007 S. Karger AG, Basel.
BACKGROUND/AIM: Indoxyl sulfate (IS) is a uremic toxin that accelerates the progression of chronic renal failure (CRF). This study aimed at determining whether IS impairs antioxidative systems (redox status) in the kidney. METHODS:IS was orally administered to normal and subtotally nephrectomized (three fourths and five sixths) rats (CRF rats) for 2 weeks. By use of in vivo and ex vivo electron spin resonance spectroscopy, the kidney redox status was evaluated using carbamoyl-PROXYL as a radical spin probe in living rats, and the kidney superoxide scavenging activity was measured. Immunohistochemistry of superoxide dismutase (SOD) in the kidney was performed. RESULTS: Administration of IS increased serum and kidney levels of IS and serum creatinine and decreased creatinine clearance. CRF rats showed reduced spin reduction rate, prolonged half-life of the spin probe, and reduced superoxide scavenging activity and SOD-positive areas in the kidney as compared with normal rats. Administration of IS further reduced radical spin reduction rate, prolonged half-life of the spin probe, and reduced superoxide scavenging activity and SOD-positive areas in the kidneys. CONCLUSIONS: Administration of IS reduced superoxide scavenging activity in the kidneys of normal and CRF rats. Thus, the nephrotoxicity of IS may be induced by impairing the antioxidative systems in the kidney. (c) 2007 S. Karger AG, Basel.
Authors: Ran-Hui Cha; Shin Wook Kang; Cheol Whee Park; Dae Ryong Cha; Ki Young Na; Sung Gyun Kim; Sun Ae Yoon; Sang Youb Han; Jae Hyun Chang; Sue K Park; Chun Soo Lim; Yon Su Kim Journal: Clin J Am Soc Nephrol Date: 2016-02-09 Impact factor: 8.237
Authors: Suree Lekawanvijit; Andrew R Kompa; Minako Manabe; Bing H Wang; Robyn G Langham; Fuyuhiko Nishijima; Darren J Kelly; Henry Krum Journal: PLoS One Date: 2012-07-19 Impact factor: 3.240
Authors: Badreldin H Ali; Sirin A Adham; Mohammed Al Za'abi; Mostafa I Waly; Javed Yasin; Abderrahim Nemmar; Nicole Schupp Journal: PLoS One Date: 2015-04-24 Impact factor: 3.240