目的观察金钗石斛生物总碱对外源性内毒素脂多糖(lipopolysaccharide,LPS)激活大鼠大脑皮层星形胶质细胞(astrocyte)及诱导其产生和释放炎症介质的影响,探讨石斛生物总碱对星形胶质细胞的抗炎作用。方法通过MTS检测细胞存活率,ELISA法检...目的观察金钗石斛生物总碱对外源性内毒素脂多糖(lipopolysaccharide,LPS)激活大鼠大脑皮层星形胶质细胞(astrocyte)及诱导其产生和释放炎症介质的影响,探讨石斛生物总碱对星形胶质细胞的抗炎作用。方法通过MTS检测细胞存活率,ELISA法检测TNF-α炎性因子蛋白的表达,实时定量多聚酶链反应(real time RT-PCR)检测炎症相关基因TNF-α、IL-6 mRNA的表达。结果①LPS刺激星形胶质细胞后,MTS检测吸光度明显升高,与正常组比较差异有显著性;②金钗石斛生物总碱能够降低LPS所致的TNF-α蛋白的高表达(P<0.05);③金钗石斛生物总碱能够降低LPS诱导的星形胶质细胞吸光度的升高,同时明显抑制LPS所致的TNF-α、IL-6 mRNA的高表达。结论金钗石斛生物总碱能够拮抗LPS所引起的炎症反应,其作用与抑制星形胶质细胞的激活及其炎症因子的释放密切相关。展开更多
The extraction of alkaloids from sophora flavescens ait with CO2SFE was studied.By use of orthogonal design ,the effects of pressure,temperature and time on extractabilities of alkaloids were studied.The results s...The extraction of alkaloids from sophora flavescens ait with CO2SFE was studied.By use of orthogonal design ,the effects of pressure,temperature and time on extractabilities of alkaloids were studied.The results showed that the optimum conditions of CO2SFE were:pressure 30 MPa,temperature 45℃,time 5h for the extraction,with NH4OH as an alkalizer and MeOH as an entrainer.The extraction rate of supercritical CO2 fluid extraction was about 24 times as that of traditional solvent extraction.展开更多
文摘目的观察金钗石斛生物总碱对外源性内毒素脂多糖(lipopolysaccharide,LPS)激活大鼠大脑皮层星形胶质细胞(astrocyte)及诱导其产生和释放炎症介质的影响,探讨石斛生物总碱对星形胶质细胞的抗炎作用。方法通过MTS检测细胞存活率,ELISA法检测TNF-α炎性因子蛋白的表达,实时定量多聚酶链反应(real time RT-PCR)检测炎症相关基因TNF-α、IL-6 mRNA的表达。结果①LPS刺激星形胶质细胞后,MTS检测吸光度明显升高,与正常组比较差异有显著性;②金钗石斛生物总碱能够降低LPS所致的TNF-α蛋白的高表达(P<0.05);③金钗石斛生物总碱能够降低LPS诱导的星形胶质细胞吸光度的升高,同时明显抑制LPS所致的TNF-α、IL-6 mRNA的高表达。结论金钗石斛生物总碱能够拮抗LPS所引起的炎症反应,其作用与抑制星形胶质细胞的激活及其炎症因子的释放密切相关。
文摘The extraction of alkaloids from sophora flavescens ait with CO2SFE was studied.By use of orthogonal design ,the effects of pressure,temperature and time on extractabilities of alkaloids were studied.The results showed that the optimum conditions of CO2SFE were:pressure 30 MPa,temperature 45℃,time 5h for the extraction,with NH4OH as an alkalizer and MeOH as an entrainer.The extraction rate of supercritical CO2 fluid extraction was about 24 times as that of traditional solvent extraction.