Objective: To determine whether corosolic acid(CA) targeting nuclear protein expression of Nrf2 activation can be used to attenuate renal damage and preserve renal function in alloxan diabetic mice.Methods: A mouse mo...Objective: To determine whether corosolic acid(CA) targeting nuclear protein expression of Nrf2 activation can be used to attenuate renal damage and preserve renal function in alloxan diabetic mice.Methods: A mouse model with diabetic nephropathy was established to examine the Nrf2 expression. Mice were randomly divided into control, diabetic control, and CA groups treated at 0.4 mg/kg, 2 mg/kg and 10 mg/kg p.o. for 8 weeks. Diabetes was induced in mice by single intraperitoneal injection of alloxan 200 mg/kg in all groups except the control. The mice with fasting blood glucose level over 200 mg/d L were considered as diabetic and were employed in the study. After 4 th and 8 th weeks, urine samples were collected(using metabolic cages) to measure protein and urea. Animals were euthanized, and serum samples were collected to estimate the glucose, creatinine, total protein, urea and blood urea nitrogen. Kidney was isolated at the end of experiment for histology to evaluate anti-oxidant parameters. Immunohistochemistry was performed to examine the Nrf2 expression.Results: CA treatment showed dose dependent reduction in level of biochemical parameters in serum and urine. CA group(10 mg/kg) showed significantly higher body weight and reduced kidney weight. Histopathological examination revealed reduced inflammation, collagen deposition and glomerulosclerosis in renal tissue. CA attenuated renal dysfunction, oxidative stress and inflammatory pro-cytokine levels.Conclusions: CA treatment exhibited ameliorative effect on kidney in mice with its enhanced Nrf2 expression.展开更多
Background: Metabolic Syndrome (MS) is considered a cluster of metabolic abnormalities whose pathogenesis is principally attributable to insulin resistance. Lack of estrogens occurs in postmenopausal women and worseni...Background: Metabolic Syndrome (MS) is considered a cluster of metabolic abnormalities whose pathogenesis is principally attributable to insulin resistance. Lack of estrogens occurs in postmenopausal women and worsening insulin resistance and lipid profile, predispose to MS. The aim of the study was to show whether a new supplement containing cinnamon, corosolic acid and glycyrrhizic acid may counteract MS manifestations. Methods: A total of 60 postmenopausal women were enrolled in a randomized, controlled trial;the active treatment group was taking the new supplement for 3 months and was on a hypocaloric diet, control group was only on diet. At the beginning and after 3 months, metabolic variables were evaluated. Results: After 3 months, a significant difference in the treated group was observed for glucose, HOMA, total cholesterol and HDL-cholesterol;whereas, in the control group, a significant difference was shown only for glucose. After 3 months, a significant difference between groups was highlighted only for HDL-cholesterol. Conclusion: This study has shown the naturally occurring components of this new supplement may improve insulin resistance and lipid profile in a small sample of postmenopausal women.展开更多
基金the financial support received under University Grants Commission Minor Research Scheme with File no. 47-831/13(WRO), Pune
文摘Objective: To determine whether corosolic acid(CA) targeting nuclear protein expression of Nrf2 activation can be used to attenuate renal damage and preserve renal function in alloxan diabetic mice.Methods: A mouse model with diabetic nephropathy was established to examine the Nrf2 expression. Mice were randomly divided into control, diabetic control, and CA groups treated at 0.4 mg/kg, 2 mg/kg and 10 mg/kg p.o. for 8 weeks. Diabetes was induced in mice by single intraperitoneal injection of alloxan 200 mg/kg in all groups except the control. The mice with fasting blood glucose level over 200 mg/d L were considered as diabetic and were employed in the study. After 4 th and 8 th weeks, urine samples were collected(using metabolic cages) to measure protein and urea. Animals were euthanized, and serum samples were collected to estimate the glucose, creatinine, total protein, urea and blood urea nitrogen. Kidney was isolated at the end of experiment for histology to evaluate anti-oxidant parameters. Immunohistochemistry was performed to examine the Nrf2 expression.Results: CA treatment showed dose dependent reduction in level of biochemical parameters in serum and urine. CA group(10 mg/kg) showed significantly higher body weight and reduced kidney weight. Histopathological examination revealed reduced inflammation, collagen deposition and glomerulosclerosis in renal tissue. CA attenuated renal dysfunction, oxidative stress and inflammatory pro-cytokine levels.Conclusions: CA treatment exhibited ameliorative effect on kidney in mice with its enhanced Nrf2 expression.
文摘Background: Metabolic Syndrome (MS) is considered a cluster of metabolic abnormalities whose pathogenesis is principally attributable to insulin resistance. Lack of estrogens occurs in postmenopausal women and worsening insulin resistance and lipid profile, predispose to MS. The aim of the study was to show whether a new supplement containing cinnamon, corosolic acid and glycyrrhizic acid may counteract MS manifestations. Methods: A total of 60 postmenopausal women were enrolled in a randomized, controlled trial;the active treatment group was taking the new supplement for 3 months and was on a hypocaloric diet, control group was only on diet. At the beginning and after 3 months, metabolic variables were evaluated. Results: After 3 months, a significant difference in the treated group was observed for glucose, HOMA, total cholesterol and HDL-cholesterol;whereas, in the control group, a significant difference was shown only for glucose. After 3 months, a significant difference between groups was highlighted only for HDL-cholesterol. Conclusion: This study has shown the naturally occurring components of this new supplement may improve insulin resistance and lipid profile in a small sample of postmenopausal women.
