本研究探讨葛根有效成分对恶性白血病可能的凋亡诱导作用及其分子机制。采用葛根总黄酮(flavonoids of puerarin,PR)处理人早幼粒细胞白血病(APL)细胞株NB4,用MTT法检测细胞增殖抑制率;FITC-Annexin V/PI双染法检测细胞凋亡率;实时定量...本研究探讨葛根有效成分对恶性白血病可能的凋亡诱导作用及其分子机制。采用葛根总黄酮(flavonoids of puerarin,PR)处理人早幼粒细胞白血病(APL)细胞株NB4,用MTT法检测细胞增殖抑制率;FITC-Annexin V/PI双染法检测细胞凋亡率;实时定量PCR检测pml/rarα、bcl-2、survivin基因表达;Western blot检测JNK、p38MAPK、FasL及caspase相关酶的变化。结果发现,PR能明显抑制NB4细胞增殖,并诱导细胞凋亡。随着PR浓度的增加,pml/rarα、bcl-2及survivin基因在mRNA水平表达下调,JNK、FasL、caspase3及caspase8蛋白表达增加,与PR浓度呈正相关;PR联合三氧化二砷(arsenic trioxide,ATO)处理后上述作用更为明显。结论:PR诱导NB4细胞凋亡的机制可能与JNK相关信号分子的活化有关;PR联合ATO具有协同诱导NB4细胞凋亡的作用。展开更多
The contents of flavonoids and puerarin in Pueraria lobata(Willd.) Ohwi were measured by UV-spectrophotometry and HPLC.The results showed that contents of flavonoids and puerarin in P.lobata were related to different ...The contents of flavonoids and puerarin in Pueraria lobata(Willd.) Ohwi were measured by UV-spectrophotometry and HPLC.The results showed that contents of flavonoids and puerarin in P.lobata were related to different parts and gathering season.The flavonoids and puerarin content from vines gathered in autumn and winter were the highest,reached to 5.18%-6.12% and 0.982%-1.718% respectively.The vine is regarded as the available medicinal resources and is worth exploiting.展开更多
文摘The contents of flavonoids and puerarin in Pueraria lobata(Willd.) Ohwi were measured by UV-spectrophotometry and HPLC.The results showed that contents of flavonoids and puerarin in P.lobata were related to different parts and gathering season.The flavonoids and puerarin content from vines gathered in autumn and winter were the highest,reached to 5.18%-6.12% and 0.982%-1.718% respectively.The vine is regarded as the available medicinal resources and is worth exploiting.
文摘目的建立葛根和粉葛中总黄酮和葛根素含量测定方法,比较室温超声法、超声加热法和加热回流法等样品处理方法对葛根和粉葛中总黄酮和葛根素含量测定结果的影响。方法总黄酮含量测定采用紫外分光光度法,在波长250 nm处测定吸光度;葛根素含量测定采用HPLC,固定相为十八烷基硅烷键合硅胶,流动相为甲醇-水(25∶75),检测波长为250 nm,流速为1.0 m L/min。结果室温超声法、加热回流法和超声加热法葛根中总黄酮含量分别为15.09%、14.48%、12.71%(n=3),葛根素含量分别为4.37%、4.09%、3.80%(n=3);粉葛中总黄酮含量分别为2.09%、2.23%、2.17%(n=3),葛根素含量分别为0.50%、0.53%、0.52%(n=3)。结论室温超声法、超声加热法可替代加热回流法分别用于葛根和粉葛中总黄酮和葛根素含量测定时供试液制备;皖南野生葛根和粉葛中葛根素含量均符合药典标准。