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Anti-inflammatory activity of arctigenin from Forsythiae Fructus 总被引:1,自引:0,他引:1
Oleaceae Forsythiae Fructus has been used for anti-inflammatory, diuretics, antidote, and antibacterials in traditional herbal medicine. Our previous screening of medicinal plants showed that methanol (MeOH) extract of Forsythiae Fructus had significant anti-inflammatory activity, but the active ingredients remain unclear. For isolation of active ingredient of MeOH extract of Forsythiae Fructus, it was partitioned with n-hexane and ethylacetate (EtOAc), and arctigenin was isolated from EtOAc fraction by column chromatography with anti-inflammatory activity-guided separation. Its activity was evaluated in the animal models of inflammation including myeloperoxidase (MPO) and eosinophil peroxidase (EPO) activities in the edematous tissues homogenate, and silica-induced reactive oxygen species (ROS) production in the RAW 264.7 cell line. It was shown that arctigenin (100 mg/kg) had significantly decreased not only carrageenan-induced paw edema 3 and 4h after injection of carrageenan, arachidonic acid (AA)-induced ear edema at a painting dose of 0.1-1.0mg/ear, and acetic acid-induced writhing response and acetic acid-induced capillary permeability accentuation at an oral dose of 25-100, and 100 mg/kg, respectively, but also MPO and EPO activities at a painting dose of 0.1-1.0mg/ear in the AA-induced edematous tissues homogenate as indicators of neutrophils and eosinophils recruitment into the inflamed tissue. Further, arctigenin (0.1-10 microM) also significantly inhibited the intracellular ROS production by silica. These results indicate that arctigenin is a bioactive agent of Forsythiae Fructus having significant anti-inflammatory action by inhibition of the exudation, and leukocytes recruitment into the inflamed tissues. The pharmacologic mechanism of action of arctigenin may be due to the inhibition of release/production of inflammatory mediators such as AA metabolites and free radicals. 相似文献
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目的:优化牛蒡子中双指标成分最佳提取工艺。方法:采用星点设计-效应面法,在3个主要因素作用下,以牛蒡子苷及牛蒡子苷元提取率为评估指标,经过多元线性回归和二项式拟合,利用岭嵴分析法优化牛蒡子苷及其苷元提取工艺。结果:确定牛蒡子苷及牛蒡子苷元最佳提取工艺为:70%乙醇,24倍量,超声提取15 min。结论:上述工艺能够大量提取牛蒡子苷及牛蒡子苷元,为制备牛蒡子苷及其苷元提供试验依据,也为充分开发利用牛蒡资源提供参考。 相似文献
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目的 考察制剂处方的热流变特性与热熔挤出(hot melt extrusion,HME)固体分散体工艺的相关性。方法 以牛蒡苷元为模型药,考察载体辅料、药辅混合物在一定的应力应变作用下黏弹性随温度的变化,及在一定的温度下,剪切频率扫描下的处方热流变特性。以体外溶出率为考察指标,辅以扫描电镜及X射线衍射法,考察HME的处方参数和工艺参数,评价热流变特性参数对HME工艺的指导作用。结果 制剂处方在高于热流变玻璃化转变温度(thermo-rheological glass transition temperature,Tgrheo)20 ℃(Tgrheo+20 ℃),复数黏度均<104Pa·s,说明在该温度时物料可以顺利挤出。以体外溶出率为考察指标,扫描电镜和X射线衍射法对固体分散体进行物相鉴别,优化得到牛蒡苷元HME最优的处方和工艺:聚合物HPMCAS-MG为载体,药辅比为1∶6,螺杆设计为0对或1对捏合块,挤出温度为155 ℃,螺杆转速30~70 r·min-1。该条件下获得的固体分散体,在pH 6.8的缓冲液中牛蒡苷元表观溶解度提高了近13倍,在60 min内溶出度可达到90%左右,且3 h内溶出稳定,未发生重结晶。结论 HME制剂处方的Tgrheo温度对HME具有重要的参考价值,Tgrheo+20 ℃是HME物料适宜的操作温度,本实验考察的所有处方均符合该规律,这一规律对提高HME的制剂处方优化研究效率具有重要意义。 相似文献
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目的:基于机械敏感离子通道探讨牛蒡子苷元(ARG)对软骨细胞SRY相关高迁移率族盒蛋白转录因子9(SOX9)、Runt相关转录因子2(RUNX2)和胶原蛋白表达的影响。方法:分离并培养原代小鼠软骨细胞。将细胞分为空白组(常规培养基)、ARG组(10μmol/L)、瞬时受体电位香草素亚家族4(TRPV4)抑制剂组(GSK2193874,10 nmol/L)、ARG+抑制剂组(10μmol/L ARG+10 nmol/L GSK2193874)和TRPV4激动剂组(GSK1016790A,10 nmol/L),各组给予相应干预。细胞培养24 h后,免疫荧光染色检测Ⅱ型胶原蛋白(ColⅡ)表达,PCR检测Ⅰ型胶原蛋白(ColⅠ)和ColⅡ的mRNA表达水平,Western blot检测转录因子SOX9、RUNX2及ColⅠ、ColⅡ的蛋白表达水平。结果:①免疫荧光染色观察显示,与空白组相比,ARG组、抑制剂组和ARG+抑制剂组ColⅡ蛋白表达更显著,而激动剂组较弱。与ARG组或抑制剂组相比,ARG+抑制剂组ColⅡ蛋白表达更显著。②与空白组相比,ARG组、抑制剂组和ARG+抑制剂组ColⅡmRNA表达量显著增高(P0.05,P0.01),ColⅠmRNA表达量明显降低(P0.01),而激动剂组ColⅡmRNA表达量显著降低(P0.01)。与ARG组相比,抑制剂组和ARG+抑制剂组细胞的ColⅡ和ColⅠ的mRNA表达量均显著增高(P0.05,P0.01),而激动剂组ColⅠmRNA表达量增高(P0.01),ColⅡmRNA表达量降低(P0.01)。与抑制剂组相比,ARG+抑制剂组ColⅡ和ColⅠ的mRNA表达量均显著增高(P0.05)。③与空白组相比,ARG组ColⅡ蛋白表达量显著上调(P0.01),ColⅠ、SOX9和RUNX2蛋白表达量降低(P0.05,P0.01);抑制剂组ColⅡ蛋白表达量亦明显增多(P0.01),ColⅠ和RUNX2蛋白表达量明显降低(P0.01);ARG+抑制剂组细胞的ColⅡ蛋白表达量显著升高(P0.01),SOX9蛋白表达量显著降低(P0.05),ColⅠ和RUNX2蛋白表达无明显变化(P0.05);激动剂组ColⅡ和SOX9蛋白表达量明显降低(P0.01),RUNX2蛋白表达量明显增高(P0.01),ColⅠ蛋白表达量无明显变化(P0.05)。④与ARG组相比,抑制剂组ColⅡ和ColⅠ蛋白表达量均显著增高(P0.05,P0.01);ARG+抑制剂组细胞的ColⅡ、ColⅠ和RUNX2蛋白表达量均明显增高(P0.01);激动剂组ColⅡ蛋白表达量降低(P0.01),ColⅠ和RUNX2蛋白表达量升高(P0.01)。与抑制剂组相比,ARG+抑制剂组细胞的ColⅡ、ColⅠ和RUNX2蛋白表达量均显著增多(P0.05),SOX9蛋白表达量明显降低(P0.05)。结论:ARG可上调软骨细胞ColⅡ表达,抑制ColⅠ表达,调节转录因子SOX9和RUNX2,促进软骨细胞分化成熟。其作用与TRPV4抑制剂相似,两者合用对ColⅡ的调控作用更显著。 相似文献
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牛蒡苷元曼尼希反应产物的合成 总被引:1,自引:0,他引:1
目的:合成牛蒡苷元曼尼希反应产物4-(3",4"-二甲氧苄基)-3-(4'-羟基-3'-甲氧基-5'-(哌啶-1-基甲基)苯甲基)二氢呋喃-2(3H)-酮。方法:本实验采用曼尼希的方法对牛蒡苷元酚羟基邻位进行结构修饰,牛蒡苷元与哌啶溶液反应合成曼尼希反应产物。结论:通过对合成工艺条件进行较为详细的考察,确定最佳工艺条件。 相似文献
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目的:合成牛蒡苷元的氨解衍生物N-苯甲基-2-(4’-羟基-3’-甲氧基苯甲基)-3-(3’’,4’’-二甲氧基苯甲基)丁酰胺。方法:本实验采用氨解的方法对牛蒡苷元的内酯环进行结构修饰,牛蒡苷元和苄胺溶液反应合成氨解衍生物。结论:通过对合成工艺条件进行较为详细的考察,确定最佳工艺条件。 相似文献