α-Hederagenin(H),derived from Hedera nepalensis var.sinensis,is a pentacyclic oleane-type triterpenoid that exhibits clear cytotoxicity to different tumor cell lines.In this study,a series of novel C-28 derivatives o...α-Hederagenin(H),derived from Hedera nepalensis var.sinensis,is a pentacyclic oleane-type triterpenoid that exhibits clear cytotoxicity to different tumor cell lines.In this study,a series of novel C-28 derivatives of hederagenin(H) were designed and synthesized in attempt to develop potent tumor resistance reverse activities agents.Previous research showed that H6 displayed robust reverse activity for paclitaxel resistance in KBV cells.Importantly,Co-treatment of paclitaxel with H6 significantly reduced the tumor weight to 42%.Pleasingly,H6 enhanced the efficacy of paclitaxel against KBV cancer cell-derived xenograft tumors in nude mice.Mechanism studies had found that H6 activated permeability glycoprotein(P-gp) ATPase,reduced intracellular ATP levels and inhibited efflux of P-gp substrates,thus enhancing the antitumor activity of paclitaxel on KBV cells.Molecular docking analysis of homology P-gp and H6 then conducted using the Surflex-Dock module.H6 showed a high binding affinity docking score with a total score of 5.4148,much higher than that of H(0.1414).The nov.el C-28 derivatives of H was synthesized from H6 via three-step reaction.The reversal activity of all synthesized H derivatives were tested using the MTT assay.The results showed that the derivatives of nitrogen groups at C-28 displayed same even potent activity than parent compound H6.In addition,its underlying mechanism of action and in vivo activity are in explore.展开更多
The saponins of Sapindus mukurossi was analyzed by tandem mass spectrometry.The molecular weights of 12 saponins from the total saponin of S.mukurossi were determined by positive and negative ions ESI-MS and their mol...The saponins of Sapindus mukurossi was analyzed by tandem mass spectrometry.The molecular weights of 12 saponins from the total saponin of S.mukurossi were determined by positive and negative ions ESI-MS and their molecular formula were acquired by HR-ESI-MS.Furthermore,the four hederagenin saponins and seven acyclic sesquiterpene saponins were identified based on the tandem mass spectrometry.展开更多
目的 :探讨山银花药效物质基础 ,全面评价金银花类药材质量。方法 :对山银花乙醇提取物的正丁醇萃取部分进行化学成分研究 ,并利用各种化学、色谱和光谱技术鉴定其化学结构。结果 :从山银花中分离得到 7个常春藤皂苷类化合物 ,经鉴定为...目的 :探讨山银花药效物质基础 ,全面评价金银花类药材质量。方法 :对山银花乙醇提取物的正丁醇萃取部分进行化学成分研究 ,并利用各种化学、色谱和光谱技术鉴定其化学结构。结果 :从山银花中分离得到 7个常春藤皂苷类化合物 ,经鉴定为常春藤皂苷元 2 8 O β D 吡喃葡萄糖基 (6→ 1) O β D 吡喃葡萄糖基酯 (Ⅰ )、常春藤皂苷元 3 O α L 吡喃阿拉伯糖基 (2→ 1) O α L 吡喃鼠李糖苷 (Ⅱ )、常春藤皂苷元 3 O α L 吡喃阿拉伯糖基 (2→ 1) O α L 吡喃鼠李糖基 (3→ 1) O β D 吡喃葡萄糖苷 (Ⅲ )、常春藤皂苷元 3 O α L 吡喃阿拉伯糖基 (2→ 1) O α L 吡喃鼠李糖基 (3→ 1) O β D 吡喃葡萄糖基 (4→ 1) O β D 吡喃葡萄糖苷 (Ⅳ )、3 O α L 吡喃阿拉伯糖基 (2→ 1) O α L 吡喃鼠李糖基 常春藤皂苷元 2 8 O β D 吡喃葡萄糖基 (6→ 1) O β D 吡喃葡萄糖基酯 (Ⅴ )、3 O α L 吡喃阿拉伯糖基 (2→ 1) O α L 吡喃鼠李糖基 (3→ 1) O β D 吡喃葡萄糖基 常春藤皂苷元 2 8 O β D 吡喃葡萄糖基 (6→ 1) O β D 吡喃葡萄糖基酯 (Ⅵ )及 3 O α L 吡喃阿拉伯糖基 (2→ 1) O α L 吡喃鼠李糖基 (3→ 1) O β D 吡喃葡萄糖基 (4→ 1) O β D 吡喃葡萄糖基 常春藤皂苷元 2展开更多
基金supported by State Key Laboratory of Drug Research(SIMM1705KF-07)
文摘α-Hederagenin(H),derived from Hedera nepalensis var.sinensis,is a pentacyclic oleane-type triterpenoid that exhibits clear cytotoxicity to different tumor cell lines.In this study,a series of novel C-28 derivatives of hederagenin(H) were designed and synthesized in attempt to develop potent tumor resistance reverse activities agents.Previous research showed that H6 displayed robust reverse activity for paclitaxel resistance in KBV cells.Importantly,Co-treatment of paclitaxel with H6 significantly reduced the tumor weight to 42%.Pleasingly,H6 enhanced the efficacy of paclitaxel against KBV cancer cell-derived xenograft tumors in nude mice.Mechanism studies had found that H6 activated permeability glycoprotein(P-gp) ATPase,reduced intracellular ATP levels and inhibited efflux of P-gp substrates,thus enhancing the antitumor activity of paclitaxel on KBV cells.Molecular docking analysis of homology P-gp and H6 then conducted using the Surflex-Dock module.H6 showed a high binding affinity docking score with a total score of 5.4148,much higher than that of H(0.1414).The nov.el C-28 derivatives of H was synthesized from H6 via three-step reaction.The reversal activity of all synthesized H derivatives were tested using the MTT assay.The results showed that the derivatives of nitrogen groups at C-28 displayed same even potent activity than parent compound H6.In addition,its underlying mechanism of action and in vivo activity are in explore.
文摘The saponins of Sapindus mukurossi was analyzed by tandem mass spectrometry.The molecular weights of 12 saponins from the total saponin of S.mukurossi were determined by positive and negative ions ESI-MS and their molecular formula were acquired by HR-ESI-MS.Furthermore,the four hederagenin saponins and seven acyclic sesquiterpene saponins were identified based on the tandem mass spectrometry.
文摘目的 :探讨山银花药效物质基础 ,全面评价金银花类药材质量。方法 :对山银花乙醇提取物的正丁醇萃取部分进行化学成分研究 ,并利用各种化学、色谱和光谱技术鉴定其化学结构。结果 :从山银花中分离得到 7个常春藤皂苷类化合物 ,经鉴定为常春藤皂苷元 2 8 O β D 吡喃葡萄糖基 (6→ 1) O β D 吡喃葡萄糖基酯 (Ⅰ )、常春藤皂苷元 3 O α L 吡喃阿拉伯糖基 (2→ 1) O α L 吡喃鼠李糖苷 (Ⅱ )、常春藤皂苷元 3 O α L 吡喃阿拉伯糖基 (2→ 1) O α L 吡喃鼠李糖基 (3→ 1) O β D 吡喃葡萄糖苷 (Ⅲ )、常春藤皂苷元 3 O α L 吡喃阿拉伯糖基 (2→ 1) O α L 吡喃鼠李糖基 (3→ 1) O β D 吡喃葡萄糖基 (4→ 1) O β D 吡喃葡萄糖苷 (Ⅳ )、3 O α L 吡喃阿拉伯糖基 (2→ 1) O α L 吡喃鼠李糖基 常春藤皂苷元 2 8 O β D 吡喃葡萄糖基 (6→ 1) O β D 吡喃葡萄糖基酯 (Ⅴ )、3 O α L 吡喃阿拉伯糖基 (2→ 1) O α L 吡喃鼠李糖基 (3→ 1) O β D 吡喃葡萄糖基 常春藤皂苷元 2 8 O β D 吡喃葡萄糖基 (6→ 1) O β D 吡喃葡萄糖基酯 (Ⅵ )及 3 O α L 吡喃阿拉伯糖基 (2→ 1) O α L 吡喃鼠李糖基 (3→ 1) O β D 吡喃葡萄糖基 (4→ 1) O β D 吡喃葡萄糖基 常春藤皂苷元 2