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Effects of an oral adsorbent on oxidative stress and fibronectin expression in experimental diabetic nephropathy
Update time:2015-03-04 18:11:47   【 Font: Large  Medium Small

Background. Previous studies have demonstrated that AST-120 (Kremezin), a well-known oral adsorbent, inhibits the progression of diabetic (DM) and non-DMchronic kidney disease along with a decrease in oxidative stress. This study was undertaken to investigate whether AST-120 could reduce oxidative stress and ameliorate the development of nephropathy in experimental DM rats with normal renal function.

Methods. Rats were injected with diluent (C, n = 16) or 65 mg/kg streptozotocin intraperitoneally (DM, n = 16), and eight rats from each group were treated with chow containing 5% AST-120. After 3 months, plasma advanced oxidation protein products (AOPP) and total malondialdehyde (MDA) levels, 24-h urinary albumin excretion, and urinary 8-hydroxy-2′-deoxyguanosine (8-OHdG) excretion were determined by ELISA. Glomerular endothelial nitric oxide synthase (eNOS), subunits of nicotinamide adenine dinucleotide phosphate (NADPH) oxidase (gp91phox, p47phox and p22phox), and fibronectin
(FN) mRNA and protein expressions were determined by real-time PCR and western blot, respectively. In addition, dichlorodihydrofluorescein diacetate (DCF-DA) staining was performed to detect glomerular reactive oxygen species (ROS) production.

Results. Compared to the C group, 24-h urinary albumin excretion was significantly higher in the DM group (P

Conclusion. In conclusion, the renoprotective effects of AST-120 in DM nephropathy seem to be associated with the amelioration of enhanced oxidative stress and FN expression under diabetic conditions.

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Source:Nephrol Dial Transplant      by SH Lee, BY Nam, EW Kang, et al.
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