title: D-saccharic acid 1,4-lactone protects diabetic rat kidney by ameliorating hyperglycemia-mediated oxidative stress and renal inflammatory cytokines via NF-κB and PKC signaling.
abstract: Increasing evidence suggests that oxidative stress is involved in the pathogenesis of diabetic nephropathy (DN) and this can be attenuated by antioxidants. D-Saccharic acid 1,4-lactone (DSL) is known for its detoxifying and antioxidant properties. Our early investigation showed that DSL can ameliorate alloxan (ALX) induced diabetes mellitus and oxidative stress in rats by inhibiting pancreatic β-cell apoptosis. In the present study we, therefore, investigated the protective role of DSL against renal injury in ALX induced diabetic rats. ALX exposure (at a dose of 120 mg/kg body weight, i. p., once) elevated the blood glucose level, serum markers related to renal injury, the production of reactive oxygen species (ROS), and disturbed the intra-cellular antioxidant machineries. Oral administration of DSL (80 mg/kg body weight) restored all these alterations close to normal. In addition, DSL could also normalize the aldose reductase activity which was found to increase in the diabetic rats. Investigating the mechanism of its protective activity, we observed the activation of different isoforms of PKC along with the accumulation of matrix proteins like collagen and fibronectin. The diabetic rats also showed nuclear translocation of NF-κB and increase in the concentration of inflammatory cytokines in the renal tissue. The activation of mitochondria dependent apoptotic pathway was observed in the diabetic rat kidneys. However, treatment of diabetic rats with DSL counteracted all these changes. These findings, for the first time, demonstrated that DSL could ameliorate renal dysfunction in diabetic rats by suppressing the oxidative stress related signalling pathways.
authors.affiliation: Department of Life Sciences & Biotechnology, Jadavpur University, 188, Raja S C Mullick Road, Kolkata 700 032, India.
authors.forename: Semantee
authors.initials: S
authors.lastname: Bhattacharya
authors.forename: Prasenjit
authors.initials: P
authors.lastname: Manna
authors.forename: Ratan
authors.initials: R
authors.lastname: Gachhui
authors.forename: Parames C
authors.initials: PC
authors.lastname: Sil
mesh_terms: D000818:Animals; D016207:Cytokines / Q000037:antagonists & inhibitors / Q000502:physiology; D003921:Diabetes Mellitus, Experimental / Q000201:enzymology / Q000378:metabolism* / Q000517:prevention & control; D005937:Glucaric Acid / Q000494:pharmacology / Q000627:therapeutic use*; D006943:Hyperglycemia / Q000201:enzymology / Q000378:metabolism* / Q000517:prevention & control; D018836:Inflammation Mediators / Q000037:antagonists & inhibitors* / Q000502:physiology; D007668:Kidney / Q000187:drug effects / Q000201:enzymology / Q000378:metabolism*; D007783:Lactones / Q000494:pharmacology / Q000627:therapeutic use*; D008297:Male; D016328:NF-kappa B / Q000502:physiology*; D018384:Oxidative Stress / Q000187:drug effects / Q000502:physiology*; D020011:Protective Agents / Q000494:pharmacology / Q000627:therapeutic use; D011493:Protein Kinase C / Q000502:physiology*; D011897:Random Allocation; D051381:Rats; D015398:Signal Transduction / Q000187:drug effects / Q000502:physiology
chemical_list: D016207:Cytokines; C571832:D-Glucaric acid, 1,4-lactone; D018836:Inflammation Mediators; D007783:Lactones; D016328:NF-kappa B; D020011:Protective Agents; D011493:Protein Kinase C; D005937:Glucaric Acid