1. Ursodeoxycholic Acid Ameliorated Diabetic Nephropathy by Attenuating Hyperglycemia-Mediated Oxidative Stress.
- Author
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Cao A, Wang L, Chen X, Guo H, Chu S, Zhang X, and Peng W
- Subjects
- Animals, Blood Glucose analysis, Catalase metabolism, Cell Survival drug effects, Cells, Cultured, Diabetic Nephropathies metabolism, Diabetic Nephropathies pathology, Endoplasmic Reticulum Stress drug effects, Hyperglycemia metabolism, Hyperglycemia pathology, Kidney drug effects, Kidney metabolism, Kidney pathology, Male, Malondialdehyde metabolism, Mice, Mice, Mutant Strains, Oxidative Stress drug effects, Reactive Oxygen Species metabolism, Superoxide Dismutase metabolism, bcl-2-Associated X Protein metabolism, Antioxidants pharmacology, Antioxidants therapeutic use, Diabetic Nephropathies drug therapy, Proto-Oncogene Proteins c-bcl-2 metabolism, Ursodeoxycholic Acid pharmacology, Ursodeoxycholic Acid therapeutic use
- Abstract
Oxidative stress has a great role in diabetes and diabetes induced organ damage. Endoplasmic reticulum (ER) stress is involved in the onset of diabetic nephropathy. We hypothesize that ER stress inhibition could protect against kidney injury through anti-oxidative effects. To test whether block ER stress could attenuate oxidative stress and improve diabetic nephropathy in vivo and in vitro, the effect of ursodeoxycholic acid (UDCA), an ER stress inhibitor, on spontaneous diabetic nephropathy db/db mice, ER stress inducer or high glucose-triggered podocytes were studied. Mice were assigned to 3 groups (n=6 per group): control group (treated with vehicle), db/db group (treated with vehicle), and UDCA group (db/db mice treated with 40 mg/kg/d UDCA). After 8 weeks treatment, mice were sacrificed. Blood and kidneys were collected for the assessment of albumin/creatinine ratio, blood urea nitrogen (BUN), serum creatinine (SCr), insulin, total cholesterol, triglyceride, low density lipoprotein cholesterol (LDL-C), oxidized LDL-C, high density lipoprotein cholesterol (HDL-C), non-esterified fatty acid (NEFA), superoxide dismutase (SOD), catalase (CAT), methane dicarboxylic aldehyde (MDA), the expressions of SOD isoforms and glutathione peroxidase 1, as well as histopathological examination. In addition, generation of reactive oxygen species (ROS) was detected by 2'7'-dichlorodihydrofluorescein diacetate (DCFH-DA) fluorescence. The results showed that UDCA alleviated renal ER stress-evoked cell death, oxidative stress, renal dysfunction, ROS production, upregulated the expression of Bcl-2 and suppressed Bax in vivo and in vitro. Hence, inhibition ER stress diminishes oxidative stress and exerts renoprotective effects.
- Published
- 2016
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