目的建立HPAEC-PAD法测定霍山石斛Dendrobium huoshanense C. Z. Tang et S. J. Cheng中甘露糖、葡萄糖、果糖、半乳糖、阿拉伯糖、木糖的含有量。方法依次采用超声处理、水解和氮气吹干法制备供试品溶液。氢氧化钠/醋酸钠溶液梯度洗脱...目的建立HPAEC-PAD法测定霍山石斛Dendrobium huoshanense C. Z. Tang et S. J. Cheng中甘露糖、葡萄糖、果糖、半乳糖、阿拉伯糖、木糖的含有量。方法依次采用超声处理、水解和氮气吹干法制备供试品溶液。氢氧化钠/醋酸钠溶液梯度洗脱;温度30℃;电极材料Au;参比电极pH-Ag/AgCl;电位波形糖四电位;体积流量0.45 mL/min。结果甘露糖、葡萄糖、果糖、半乳糖、阿拉伯糖、木糖在各自范围内线性关系良好(r>0.990 0),平均加样回收率分别为93.4%、92.3%、93.7%、106.1%、94.1%、103.7%,RSD分别为2.1%、1.7%、3.3%、1.2%、4.5%、1.7%。结论该方法稳定性好,灵敏度高,可用于霍山石斛的质量控制。展开更多
OBJECTIVE Salvianolic acid A(SAA),a polyphenols acid,is a bioactive ingredient from a traditional Chinese medicine named Danshen(Salvia Miltiorrhiza Bunge).According to previous studies,it was shown to possess various...OBJECTIVE Salvianolic acid A(SAA),a polyphenols acid,is a bioactive ingredient from a traditional Chinese medicine named Danshen(Salvia Miltiorrhiza Bunge).According to previous studies,it was shown to possess various effects such as anti-oxidative stress,anti-diabetic complications and anti-pulmonary hypertension.This study is aimed to investigate the effect of SAA on pulmonary arterial endothelial-mesenchymal transition(endoMT)induced by hypoxia and the underlying mechanisms.METHODS Primary cultured human pulmonary arterial endothelial cells(HPAECs)were exposed to 1%O2 for 48 h with or without SAA treatment.RESULTS SAA treatment improved the morphology of HPAECs and inhibited the cytoskeleton remodeling and reduced migration distances.It was observed that the produc⁃tion of ROS in cells was significantly reduced by the treatment of SAA.Meanwhile,SAA alleviated the loss of CD31 and slightly inhibited the expression ofα-SMA.The mechanisms study shows that SAA treatment increased the phosphoryla⁃tion levels of Smad1/5,but inhibited that of Smad2/3.Furthermore,SAA attenuated the phosphorylation levels of ERK and Cofilin,which were enhanced by hypoxia.CONCLUSION SAA treatment can protect HPAECs from endoMT induced by hypoxia,which may perform via the downstream effectors of BMPRs or TGFβR including Smads,ERK and ROCK/cofilin pathways.展开更多
用高效阴离子交换色谱-脉冲安培检测法(HPAEC-PAD)测定了烤烟中的水溶性葡萄糖、果糖和蔗糖。采用水浸取及膜过滤法处理烤烟样品,以D ionex C arboPac PA-1阴离子交换柱为色谱柱,0.2m o l/L N aOH水溶液为淋洗液进行分离测定。葡萄糖、...用高效阴离子交换色谱-脉冲安培检测法(HPAEC-PAD)测定了烤烟中的水溶性葡萄糖、果糖和蔗糖。采用水浸取及膜过滤法处理烤烟样品,以D ionex C arboPac PA-1阴离子交换柱为色谱柱,0.2m o l/L N aOH水溶液为淋洗液进行分离测定。葡萄糖、果糖和蔗糖的含量与其峰面积的线性关系良好,回收率均在97%以上。方法简便易行,灵敏度高,重现性良好,可以实现对烟草中单糖的快速分离和测定。展开更多
文摘目的建立HPAEC-PAD法测定霍山石斛Dendrobium huoshanense C. Z. Tang et S. J. Cheng中甘露糖、葡萄糖、果糖、半乳糖、阿拉伯糖、木糖的含有量。方法依次采用超声处理、水解和氮气吹干法制备供试品溶液。氢氧化钠/醋酸钠溶液梯度洗脱;温度30℃;电极材料Au;参比电极pH-Ag/AgCl;电位波形糖四电位;体积流量0.45 mL/min。结果甘露糖、葡萄糖、果糖、半乳糖、阿拉伯糖、木糖在各自范围内线性关系良好(r>0.990 0),平均加样回收率分别为93.4%、92.3%、93.7%、106.1%、94.1%、103.7%,RSD分别为2.1%、1.7%、3.3%、1.2%、4.5%、1.7%。结论该方法稳定性好,灵敏度高,可用于霍山石斛的质量控制。
基金CAMS Innovation Fund for Medical Sciences(2017-I2M-1-010)National Natural Science Foundation of China(81773935+1 种基金8157364581603101)
文摘OBJECTIVE Salvianolic acid A(SAA),a polyphenols acid,is a bioactive ingredient from a traditional Chinese medicine named Danshen(Salvia Miltiorrhiza Bunge).According to previous studies,it was shown to possess various effects such as anti-oxidative stress,anti-diabetic complications and anti-pulmonary hypertension.This study is aimed to investigate the effect of SAA on pulmonary arterial endothelial-mesenchymal transition(endoMT)induced by hypoxia and the underlying mechanisms.METHODS Primary cultured human pulmonary arterial endothelial cells(HPAECs)were exposed to 1%O2 for 48 h with or without SAA treatment.RESULTS SAA treatment improved the morphology of HPAECs and inhibited the cytoskeleton remodeling and reduced migration distances.It was observed that the produc⁃tion of ROS in cells was significantly reduced by the treatment of SAA.Meanwhile,SAA alleviated the loss of CD31 and slightly inhibited the expression ofα-SMA.The mechanisms study shows that SAA treatment increased the phosphoryla⁃tion levels of Smad1/5,but inhibited that of Smad2/3.Furthermore,SAA attenuated the phosphorylation levels of ERK and Cofilin,which were enhanced by hypoxia.CONCLUSION SAA treatment can protect HPAECs from endoMT induced by hypoxia,which may perform via the downstream effectors of BMPRs or TGFβR including Smads,ERK and ROCK/cofilin pathways.
文摘用高效阴离子交换色谱-脉冲安培检测法(HPAEC-PAD)测定了烤烟中的水溶性葡萄糖、果糖和蔗糖。采用水浸取及膜过滤法处理烤烟样品,以D ionex C arboPac PA-1阴离子交换柱为色谱柱,0.2m o l/L N aOH水溶液为淋洗液进行分离测定。葡萄糖、果糖和蔗糖的含量与其峰面积的线性关系良好,回收率均在97%以上。方法简便易行,灵敏度高,重现性良好,可以实现对烟草中单糖的快速分离和测定。
