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  • Title: 7-O-galloyl-D-sedoheptulose ameliorates renal damage triggered by reactive oxygen species-sensitive pathway of inflammation and apoptosis.
    Author: Park CH, Noh JS, Tanaka T, Yokozawa T.
    Journal: J Pharm Pharmacol; 2012 Dec; 64(12):1730-40. PubMed ID: 23146036.
    Abstract:
    OBJECTIVES: This study was carried out to verify the preventive effects of 7-O-galloyl-d-sedoheptulose (GS), a phenolic compound isolated from Corni Fructus, underlying diabetic renal damage in type 2 diabetes. METHODS: GS was orally administered to db/db mice at doses of 20 and 100 mg/kg body weight per day for six weeks, and its effects were compared with those of the vehicle in db/db and m/m mice. KEY FINDINGS: In the serum and kidney, biochemical factors and expression of protein related to nicotinamide adenine dinucleotide phosphate (NADPH) oxidase, apoptosis and inflammation were examined. GS treatment attenuated serum and renal oxidative stress through reduction of reactive oxygen species and lipid peroxidation and increase in the ratio of glutathione and its oxidised form. Importantly, GS reduced renal protein expression of Nox-4 and p22(phox) (one of the subunits of NADPH oxidase), pro-apoptotic factors (such as Bax and cytochrome c) and nuclear factor-kappa B-targeting pro-inflammatory inducible nitric oxide synthase and cyclooxygenase-2. CONCLUSIONS: These renoprotective effects of GS were achieved through attenuation of diabetes-induced oxidative stress and its sensitive protein expression associated with inflammation and apoptosis in db/db mice.
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