The iso fl avone calycosin-7-O-β-D-glucopyranoside(CG) is a principal constituent of Astragalus membranaceus(AR) and has been reported to inhibit osteoclast development in vitro and bone loss in vivo. The aim of this...The iso fl avone calycosin-7-O-β-D-glucopyranoside(CG) is a principal constituent of Astragalus membranaceus(AR) and has been reported to inhibit osteoclast development in vitro and bone loss in vivo. The aim of this study was to investigate the osteogenic effects of CG and its underlying mechanism in ST2 cells. The results show that exposure of cells to CG in osteogenic differentiation medium increases ALP activity, osteocalcin(Ocal) m RNA expression and the osteoblastic mineralization process. Mechanistically, CG treatment increased the expression of bone morphogenetic protein 2(BMP-2), p-Smad 1/5/8, β-catenin and Runx2, all of which are regulators of the BMP- or wingless-type MMTV integration site family(WNT)/β-catenin-signaling pathways. Moreover, the osteogenic effects of CG were inhibited by Noggin and DKK-1 which are classical inhibitors of the BMP and WNT/β-catenin-signaling pathways, respectively. Taken together, the results indicate that CG promotes the osteoblastic differentiation of ST2 cells through regulating the BMP/WNT signaling pathways. On this basis, CG may be a useful lead compound for improving the treatment of bone-decreasing diseases and enhancing bone regeneration.展开更多
目的利用响应面法优选气血双补酒的渗漉提取工艺。方法采用单因素试验结合Box-Behnken中心组合设计方法,对提取工艺中乙醇体积分数、溶剂倍量、渗漉速率3个因素进行考察,以复方中6个指标性成分(人参皂苷Rb1、毛蕊异黄酮葡萄糖苷、阿魏...目的利用响应面法优选气血双补酒的渗漉提取工艺。方法采用单因素试验结合Box-Behnken中心组合设计方法,对提取工艺中乙醇体积分数、溶剂倍量、渗漉速率3个因素进行考察,以复方中6个指标性成分(人参皂苷Rb1、毛蕊异黄酮葡萄糖苷、阿魏酸、二苯乙烯苷、芍药苷、橙皮苷)及浸出物的质量浓度的综合评分作为考察指标进行提取工艺优化研究。结果最佳提取工艺为以10倍量48%乙醇,1.4 m L/min的体积流量渗漉提取。结论响应面法优选气血双补酒提取工艺简便、合理可行,具有较高的精确度,可为工业化大生产提供科学的依据。展开更多
基金supported by the National Natural Science Foundation of China, China (No. 31400304)the Natural Science Foundation of Hubei Province, China (No. 2012FFB00303)+1 种基金the Youth & Middle-aged Talent Project of Hubei Province (No. Q20111005)the Science and Technology Program of Shandong Province (No. J12LL07)
文摘The iso fl avone calycosin-7-O-β-D-glucopyranoside(CG) is a principal constituent of Astragalus membranaceus(AR) and has been reported to inhibit osteoclast development in vitro and bone loss in vivo. The aim of this study was to investigate the osteogenic effects of CG and its underlying mechanism in ST2 cells. The results show that exposure of cells to CG in osteogenic differentiation medium increases ALP activity, osteocalcin(Ocal) m RNA expression and the osteoblastic mineralization process. Mechanistically, CG treatment increased the expression of bone morphogenetic protein 2(BMP-2), p-Smad 1/5/8, β-catenin and Runx2, all of which are regulators of the BMP- or wingless-type MMTV integration site family(WNT)/β-catenin-signaling pathways. Moreover, the osteogenic effects of CG were inhibited by Noggin and DKK-1 which are classical inhibitors of the BMP and WNT/β-catenin-signaling pathways, respectively. Taken together, the results indicate that CG promotes the osteoblastic differentiation of ST2 cells through regulating the BMP/WNT signaling pathways. On this basis, CG may be a useful lead compound for improving the treatment of bone-decreasing diseases and enhancing bone regeneration.
文摘目的利用响应面法优选气血双补酒的渗漉提取工艺。方法采用单因素试验结合Box-Behnken中心组合设计方法,对提取工艺中乙醇体积分数、溶剂倍量、渗漉速率3个因素进行考察,以复方中6个指标性成分(人参皂苷Rb1、毛蕊异黄酮葡萄糖苷、阿魏酸、二苯乙烯苷、芍药苷、橙皮苷)及浸出物的质量浓度的综合评分作为考察指标进行提取工艺优化研究。结果最佳提取工艺为以10倍量48%乙醇,1.4 m L/min的体积流量渗漉提取。结论响应面法优选气血双补酒提取工艺简便、合理可行,具有较高的精确度,可为工业化大生产提供科学的依据。