【目的】探讨黄芪甲苷对糖尿病肾病大鼠的治疗作用及机制。【方法】将27只大鼠随机分为正常组、模型组、黄芪甲苷组,每组9只。模型组、黄芪甲苷组大鼠给予高脂饲料喂养联合链脲佐菌素(STZ)40 mg/kg腹腔注射构建2型糖尿病肾病模型。造模...【目的】探讨黄芪甲苷对糖尿病肾病大鼠的治疗作用及机制。【方法】将27只大鼠随机分为正常组、模型组、黄芪甲苷组,每组9只。模型组、黄芪甲苷组大鼠给予高脂饲料喂养联合链脲佐菌素(STZ)40 mg/kg腹腔注射构建2型糖尿病肾病模型。造模成功后,黄芪甲苷组给予黄芪甲苷40 mg/kg灌胃治疗,正常组、模型组给予等体积生理盐水,每日1次,持续12周。12周后,测定大鼠空腹血糖(FBG)、尿白蛋白/尿肌酐比值(UACR)、血尿素氮(BUN)、血清肌酐(SCr)水平;苏木素-伊红(HE)染色法观察肾脏病理结构变化;过碘酸雪夫(PAS)染色、马松(Masson)染色法观察肾脏纤维化程度;定量聚合酶链反应(qPCR)、蛋白免疫印迹(Western Blot)法检测肾脏组织中腺苷酸蛋白活化激酶(AMPK)、内皮型一氧化氮合酶(e NOS)mRNA及蛋白表达水平。【结果】与模型组比较,黄芪甲苷组大鼠FBG、UACR显著降低(P<0.05),BUN、SCr含量未见明显改变;与模型组比较,黄芪甲苷组大鼠肾小球体积减小,基底膜增厚、系膜基质增生、肾小囊腔狭窄程度、胶原纤维沉积明显减轻;进一步的实验结果显示,黄芪甲苷组肾脏组织中AMPK、e NOS m RNA表达水平较模型组明显升高(P<0.05),AMPK的磷酸化水平及eNOS蛋白表达水平较模型组明显上调(P<0.05)。【结论】黄芪甲苷可改善大鼠糖尿病肾损害,其机制可能与激活AMPK/eNOS信号通路有关。展开更多
Cerebral hypoxia or ischemia results in cell death and cerebral edema, as well as other cellular reactions such as angiogenesis and the reestablishment of functional microvasculature to promote recovery from brain inj...Cerebral hypoxia or ischemia results in cell death and cerebral edema, as well as other cellular reactions such as angiogenesis and the reestablishment of functional microvasculature to promote recovery from brain injury. Vascular endothelial growth factor is expressed in the central nervous system after hypoxic/ischemic brain injury, and is involved in the process of brain repair via the regulation of angiogenesis, neurogenesis, neurite outgrowth, and cerebral edema, which all require vascular endothelial growth factor signaling. In this review, we focus on the role of the vascular endothelial growth factor signaling pathway in the response to hypoxic/ischemic brain injury, and discuss potential therapeutic interventions.展开更多
文摘【目的】探讨黄芪甲苷对糖尿病肾病大鼠的治疗作用及机制。【方法】将27只大鼠随机分为正常组、模型组、黄芪甲苷组,每组9只。模型组、黄芪甲苷组大鼠给予高脂饲料喂养联合链脲佐菌素(STZ)40 mg/kg腹腔注射构建2型糖尿病肾病模型。造模成功后,黄芪甲苷组给予黄芪甲苷40 mg/kg灌胃治疗,正常组、模型组给予等体积生理盐水,每日1次,持续12周。12周后,测定大鼠空腹血糖(FBG)、尿白蛋白/尿肌酐比值(UACR)、血尿素氮(BUN)、血清肌酐(SCr)水平;苏木素-伊红(HE)染色法观察肾脏病理结构变化;过碘酸雪夫(PAS)染色、马松(Masson)染色法观察肾脏纤维化程度;定量聚合酶链反应(qPCR)、蛋白免疫印迹(Western Blot)法检测肾脏组织中腺苷酸蛋白活化激酶(AMPK)、内皮型一氧化氮合酶(e NOS)mRNA及蛋白表达水平。【结果】与模型组比较,黄芪甲苷组大鼠FBG、UACR显著降低(P<0.05),BUN、SCr含量未见明显改变;与模型组比较,黄芪甲苷组大鼠肾小球体积减小,基底膜增厚、系膜基质增生、肾小囊腔狭窄程度、胶原纤维沉积明显减轻;进一步的实验结果显示,黄芪甲苷组肾脏组织中AMPK、e NOS m RNA表达水平较模型组明显升高(P<0.05),AMPK的磷酸化水平及eNOS蛋白表达水平较模型组明显上调(P<0.05)。【结论】黄芪甲苷可改善大鼠糖尿病肾损害,其机制可能与激活AMPK/eNOS信号通路有关。
基金supported by the National Natural Science Foundation of China,No.81401238,81330016,31171020,81172174 and 81270724the grants from Ministry of Education of China,No.313037,20110181130002+2 种基金a grant from State Commission of Science Technology of China,No.2012BAI04B04the grants from Science and Technology Bureau of Sichuan Province of China,No.2012SZ0010,2014FZ0113,2014SZ0149a grant from Clinical Discipline Program(Neonatology)from the Ministry of Health of China,No.1311200003303
文摘Cerebral hypoxia or ischemia results in cell death and cerebral edema, as well as other cellular reactions such as angiogenesis and the reestablishment of functional microvasculature to promote recovery from brain injury. Vascular endothelial growth factor is expressed in the central nervous system after hypoxic/ischemic brain injury, and is involved in the process of brain repair via the regulation of angiogenesis, neurogenesis, neurite outgrowth, and cerebral edema, which all require vascular endothelial growth factor signaling. In this review, we focus on the role of the vascular endothelial growth factor signaling pathway in the response to hypoxic/ischemic brain injury, and discuss potential therapeutic interventions.
