One new cucurbitane-type triterpenoid saponin, 5β,19-epoxycucurbita-6,23-diene-3β,19,25-triol-3-O-β-D-allopyranoside (1),named momordicoside P was isolated from the fresh fruits ofMomordica charantia. The structu...One new cucurbitane-type triterpenoid saponin, 5β,19-epoxycucurbita-6,23-diene-3β,19,25-triol-3-O-β-D-allopyranoside (1),named momordicoside P was isolated from the fresh fruits ofMomordica charantia. The structure of the saponin was elucidated by spectral methods, including 2D-NMR spectra.展开更多
目的通过苦瓜总皂苷对2型糖尿病大鼠蛋白激酶B(PKB或Akt-2)和腺苷酸活化蛋白激酶(AMPK)的作用来揭示其改善胰岛素抵抗的机制。方法用高脂高糖饮食喂养结合小剂量链脲佐菌素注射,来复制2型糖尿病模型。按照体重随机分为6组:正常组、模型...目的通过苦瓜总皂苷对2型糖尿病大鼠蛋白激酶B(PKB或Akt-2)和腺苷酸活化蛋白激酶(AMPK)的作用来揭示其改善胰岛素抵抗的机制。方法用高脂高糖饮食喂养结合小剂量链脲佐菌素注射,来复制2型糖尿病模型。按照体重随机分为6组:正常组、模型组、对照组和3个剂量实验组,对照组和3个剂量实验组大鼠每天分别给予50 mg·kg-1二甲双胍2 m L和3个剂量(100,200,400 mg·kg-1)苦瓜总皂苷2 m L,灌胃8周。用生化分析仪检测空腹血糖,用酶联免疫吸附试验检测胰岛素,用RT-PCR和Western Blot法检测肝组织Akt-2和AMPK的mRNA和蛋白表达量。结果 3个剂量实验组稳态胰岛素抵抗评价指数较模型组明显降低,Akt-2和AMPK的mRNA和蛋白表达量较模型组明显增高。结论苦瓜总皂苷改善胰岛素抵抗的作用机制可能为上调Akt-2和AMPK的mRNA以及蛋白表达量。展开更多
基金The authors thank the National Natural Science Foundation of China (No. 20432030) the program for Changjiang Scholar and Innovative Team in University (No. 985-2-063-112) for financial support of this work.
文摘One new cucurbitane-type triterpenoid saponin, 5β,19-epoxycucurbita-6,23-diene-3β,19,25-triol-3-O-β-D-allopyranoside (1),named momordicoside P was isolated from the fresh fruits ofMomordica charantia. The structure of the saponin was elucidated by spectral methods, including 2D-NMR spectra.
文摘目的通过苦瓜总皂苷对2型糖尿病大鼠蛋白激酶B(PKB或Akt-2)和腺苷酸活化蛋白激酶(AMPK)的作用来揭示其改善胰岛素抵抗的机制。方法用高脂高糖饮食喂养结合小剂量链脲佐菌素注射,来复制2型糖尿病模型。按照体重随机分为6组:正常组、模型组、对照组和3个剂量实验组,对照组和3个剂量实验组大鼠每天分别给予50 mg·kg-1二甲双胍2 m L和3个剂量(100,200,400 mg·kg-1)苦瓜总皂苷2 m L,灌胃8周。用生化分析仪检测空腹血糖,用酶联免疫吸附试验检测胰岛素,用RT-PCR和Western Blot法检测肝组织Akt-2和AMPK的mRNA和蛋白表达量。结果 3个剂量实验组稳态胰岛素抵抗评价指数较模型组明显降低,Akt-2和AMPK的mRNA和蛋白表达量较模型组明显增高。结论苦瓜总皂苷改善胰岛素抵抗的作用机制可能为上调Akt-2和AMPK的mRNA以及蛋白表达量。