目的探讨葫芦素B对压力负荷诱导的心肌纤维化的作用机制。方法选择C57小鼠60只,随机分为假手术组、葫芦素B组、结扎术组(主动脉结扎术)、联合组(葫芦素B+主动脉结扎术),每组15只。术后1周给予葫芦素B灌胃处理[0.2mg/(kg·2d),持续...目的探讨葫芦素B对压力负荷诱导的心肌纤维化的作用机制。方法选择C57小鼠60只,随机分为假手术组、葫芦素B组、结扎术组(主动脉结扎术)、联合组(葫芦素B+主动脉结扎术),每组15只。术后1周给予葫芦素B灌胃处理[0.2mg/(kg·2d),持续到术后4周],主动脉结扎术诱导心肌纤维化模型。用免疫组织化学方法检测心脏微血管密度;免疫荧光检测α-平滑肌肌动蛋白(α-SMA)表达;运用免疫荧光染色和蛋白免疫印迹法检测CD31、CD34、α-SMA和波形蛋白表达和内皮间质转化程度。结果假手术组和葫芦素B组术后4周心脏微血管密度、α-SMA,波形蛋白、CD31、CD34表达无明显变化(P>0.05)。与假手术组比较,结扎术组术后4周心脏微血管密度、CD31、CD34表达明显下调,α-SMA、波形蛋白表达明显增加(P<0.05)。联合组术后4周心脏微血管密度、CD31、CD34表达明显高于结扎术组(4.31±1.06 vs 2.24±0.78,0.22±0.04 vs 0.05±0.02,0.12±0.02 vs0.04±0.01,P<0.05),α-SMA、波形蛋白表达明显低于结扎术组(0.31±0.03 vs 0.98±0.04,0.05±0.02 vs 0.53±0.07,P<0.05)。结论葫芦素B可以通过抑制内皮向间质转化改善压力负荷诱导的心肌纤维化。展开更多
Cucurbitacins are highly oxidized tetracyclic triterpenoids that are widely found in plants belonging to Cucurbitaceae family and exert various pharmacological effects.Many cucurbitacin derivatives are available,of wh...Cucurbitacins are highly oxidized tetracyclic triterpenoids that are widely found in plants belonging to Cucurbitaceae family and exert various pharmacological effects.Many cucurbitacin derivatives are available,of which cucurbitacins B,D,E,and I are important members of the cucurbitacin family and exert anticancer effects against various cancers.This review summarizes the advances in research on cucurbitacins B,D,E,and I in inducing tumor cell apoptosis,cytoskeletal destruction,cell cycle arrest,and autophagy and in regulating various cancer-related signaling pathways.In addition,this review summarizes the latest research on the synergistic effects of the combination of cucurbitacins and clinically approved chemotherapeutic drugs.The findings summarized in this review suggest that cucurbitacins are multi-targeting and multi-functional anticancer drugs and that their complex anticancer mechanisms should be examined in future studies.Because of their proven benefits,cucurbitacins have the potential to be used as anticancer drugs in the clinical setting.展开更多
文摘目的探讨葫芦素B对压力负荷诱导的心肌纤维化的作用机制。方法选择C57小鼠60只,随机分为假手术组、葫芦素B组、结扎术组(主动脉结扎术)、联合组(葫芦素B+主动脉结扎术),每组15只。术后1周给予葫芦素B灌胃处理[0.2mg/(kg·2d),持续到术后4周],主动脉结扎术诱导心肌纤维化模型。用免疫组织化学方法检测心脏微血管密度;免疫荧光检测α-平滑肌肌动蛋白(α-SMA)表达;运用免疫荧光染色和蛋白免疫印迹法检测CD31、CD34、α-SMA和波形蛋白表达和内皮间质转化程度。结果假手术组和葫芦素B组术后4周心脏微血管密度、α-SMA,波形蛋白、CD31、CD34表达无明显变化(P>0.05)。与假手术组比较,结扎术组术后4周心脏微血管密度、CD31、CD34表达明显下调,α-SMA、波形蛋白表达明显增加(P<0.05)。联合组术后4周心脏微血管密度、CD31、CD34表达明显高于结扎术组(4.31±1.06 vs 2.24±0.78,0.22±0.04 vs 0.05±0.02,0.12±0.02 vs0.04±0.01,P<0.05),α-SMA、波形蛋白表达明显低于结扎术组(0.31±0.03 vs 0.98±0.04,0.05±0.02 vs 0.53±0.07,P<0.05)。结论葫芦素B可以通过抑制内皮向间质转化改善压力负荷诱导的心肌纤维化。
文摘Cucurbitacins are highly oxidized tetracyclic triterpenoids that are widely found in plants belonging to Cucurbitaceae family and exert various pharmacological effects.Many cucurbitacin derivatives are available,of which cucurbitacins B,D,E,and I are important members of the cucurbitacin family and exert anticancer effects against various cancers.This review summarizes the advances in research on cucurbitacins B,D,E,and I in inducing tumor cell apoptosis,cytoskeletal destruction,cell cycle arrest,and autophagy and in regulating various cancer-related signaling pathways.In addition,this review summarizes the latest research on the synergistic effects of the combination of cucurbitacins and clinically approved chemotherapeutic drugs.The findings summarized in this review suggest that cucurbitacins are multi-targeting and multi-functional anticancer drugs and that their complex anticancer mechanisms should be examined in future studies.Because of their proven benefits,cucurbitacins have the potential to be used as anticancer drugs in the clinical setting.
基金supported by Science and Technology Commission of Shanghai Municipality (No.06DZ22028)~~
文摘目的:研究秃瓣杜英Elaeocarpus glabripetalus Merr.茎叶的化学成分。方法:采用硅胶柱色谱、Sephadex LH-20柱色谱、ODS反相柱色谱等方法对秃瓣杜英茎叶95%乙醇提取物进行分离和纯化,应用理化性质及波谱方法对实验得到的单体化合物进行结构鉴定。结果:分离并鉴定11个化合物,分别为:山柰酚(1)、β-谷甾醇(2)、葫芦素D(3)、没食子酸甲酯(4)、没食子酸乙酯(5)、槲皮素(6)、3,4-二羟基苯甲酸(7)、Mogroside I E1(8)、5R,6R-Epoxymogroside I E1(9)、山奈酚-7-O-α-L-吡喃阿拉伯糖苷(10)、芦丁(11)。结论:化合物2和3为首次从该植物中分离得到,其余9个化合物均为首次从杜英属植物中分得,对化合物8的结构首次进行了X-衍射分析。化合物9在体外实验中能增加脂肪细胞分泌脂联素的水平(25μg.mL-1浓度时增加1.32倍)。
