Total Triterpene Acids, Isolated from Corni Fructus, Ameliorate Progression of Renal Damage in Streptozotocin-lnduced Diabetic Rats

• Published in: 中国结合医学杂志：英文版 2014 (6), p.456-461
• Main Author: 齐敏友 谢高宇 陈凯 苏燕慧 喻苏青 刘浩然
• Format: Article
• Language: English
• Subjects: 三萜酸; 交通管理; 山茱萸; 枳壳; 糖尿病大鼠; 肾损害; 超氧化物歧化酶; 链脲佐菌素
• ISSN: 1672-0415; 1993-0402

Objective： To investigate whether total triterpene acids （TTAs）, isolated from Comus Fructus, attenuates renal function by reducing oxidative stress and down-regulating the expression of transforming growth factor β1 （TGF- β1）. Methods： Diabetes was induced by an injection of streptozotocin （40 mg/kg intravenously）. Thirty rats were randomly divided into three groups： control group, diabetic model group and l-rAs treatment group （50 mg/kg, intragastrically） administrated for 8 weeks from 5th to 12th week. All rats were anaesthetized and then were killed to remove kidneys. The renal function and redox enzyme system parameters were tested. Glomerular morphology was observed by a light microscopy. Immunohistochemistry and Western blot assays were employed to determine the protein levels of TGF- β1. Results： TTAs attenuated the levels of urinary protein, serum creatinine and blood urea nitrogen, although it did not significantly reduce the level of glucose. In addition, TTAs decreased the malondialdehyde while increased superoxide dismutase, catalase and glutathione peroxide activities in diabetic rats. The renal pathological changes in TTAs treatment group were ameliorated. Furthermore, TTAs also ameliorated the expression of TGF- β1. Conclusion： TTAs improved renal function via reducing oxidative stress and down-regulation the expression of TGF- β1 in diabetic rats.