[Objective] This study aimed to separate and purify antibacterial substances from soil Streptomyces sp. CaiF1, and to explore the activities of this substance. [Method] The antibacterial substances were separated and ...[Objective] This study aimed to separate and purify antibacterial substances from soil Streptomyces sp. CaiF1, and to explore the activities of this substance. [Method] The antibacterial substances were separated and purified by Ethyl acetate extraction, macroporous adsorptive resin, silica gel chromatography and preparative high performance liquid chromatography (HPLC), and powdery mildew were taken as the indicating bacterial to study their activities. [Result] Antibacterial substances were purified and the stability analysis of the extracts from Streptomyces CaiF1 fermentation broth showed very stable at pH 2.0-pH 10.0, 100 ℃ and changed very little under UV treatment for 24 h. Inhibition rate of powdery mildew was 69.7%. [Conclusion] The purified antibacterial substances showed good stability, which provided theoretical foundation for their structural identifications and future applications.展开更多
目的:基于网络药理学方法筛选固本平喘剂(补骨脂、地龙、防风)中的主要活性成分,探讨其治疗支气管哮喘的作用机制。方法:通过中药系统药理学数据库TCMSP数据库、中药与化学成分数据库,筛选固本平喘剂的活性成分及靶标。利用Genecards、O...目的:基于网络药理学方法筛选固本平喘剂(补骨脂、地龙、防风)中的主要活性成分,探讨其治疗支气管哮喘的作用机制。方法:通过中药系统药理学数据库TCMSP数据库、中药与化学成分数据库,筛选固本平喘剂的活性成分及靶标。利用Genecards、OMIM数据库获得支气管哮喘的潜在靶标基因。将两者靶基因进行映射后通过Cytoscape3.6.1软件构建“成分-靶标”网络、结合String数据库构建蛋白质相互作用网络扩充核心靶点。依托功能注释生物信息学分析平台DAVID数据库对固本平喘剂的作用靶点进行基因本体(gene ontology,GO)生物学过程和基因组百科全书(kyoto encyclopedia of genes and genomes,KEGG)通路富集注释分析,通过Autodock vina软件进行分子对接以验证结果。结果:符合筛选条件的共有53个活性成分,补骨脂18个,地龙17个,防风18个,筛选得到固本平喘剂关键成分,包括补骨脂黄酮类、补骨脂查耳酮类、汉黄芩素、补骨脂酚、β-谷甾醇等;通过GenCards、OMIM数据库剔除重复后,共收集支气管哮喘潜在靶点2358个。将固本平喘剂和支气管哮喘靶点进行映射取交集共得到237个交叉靶点,即固本平喘剂治疗支气管哮喘潜在作用靶点。以degree值大于二倍均值的靶点为PTGS2、ESR1、ACHE、ESR2、PTGS1、DPP4、ADORA3,degree值排名前5的靶蛋白为PIK3CA、MAPK3、MAPK1、TP53、AKT1。主要涉及PI3K-Akt信号通路、TNF信号通路、趋化因子信号通路、FoxO信号通路、MAPK信号通路、Toll样受体信号通路、T细胞受体信号通路等。结论:固本平喘剂治疗支气管哮喘潜在作用靶点有PTGS2、ESR1、ACHE、ESR2、PTGS1、DPP4、ADORA3、PIK3CA、MAPK3、MAPK1、TP53、AKT1,可能通过抗感染、调节免疫、抑制气道重塑等发挥作用。展开更多
文摘[Objective] This study aimed to separate and purify antibacterial substances from soil Streptomyces sp. CaiF1, and to explore the activities of this substance. [Method] The antibacterial substances were separated and purified by Ethyl acetate extraction, macroporous adsorptive resin, silica gel chromatography and preparative high performance liquid chromatography (HPLC), and powdery mildew were taken as the indicating bacterial to study their activities. [Result] Antibacterial substances were purified and the stability analysis of the extracts from Streptomyces CaiF1 fermentation broth showed very stable at pH 2.0-pH 10.0, 100 ℃ and changed very little under UV treatment for 24 h. Inhibition rate of powdery mildew was 69.7%. [Conclusion] The purified antibacterial substances showed good stability, which provided theoretical foundation for their structural identifications and future applications.
文摘目的:基于网络药理学方法筛选固本平喘剂(补骨脂、地龙、防风)中的主要活性成分,探讨其治疗支气管哮喘的作用机制。方法:通过中药系统药理学数据库TCMSP数据库、中药与化学成分数据库,筛选固本平喘剂的活性成分及靶标。利用Genecards、OMIM数据库获得支气管哮喘的潜在靶标基因。将两者靶基因进行映射后通过Cytoscape3.6.1软件构建“成分-靶标”网络、结合String数据库构建蛋白质相互作用网络扩充核心靶点。依托功能注释生物信息学分析平台DAVID数据库对固本平喘剂的作用靶点进行基因本体(gene ontology,GO)生物学过程和基因组百科全书(kyoto encyclopedia of genes and genomes,KEGG)通路富集注释分析,通过Autodock vina软件进行分子对接以验证结果。结果:符合筛选条件的共有53个活性成分,补骨脂18个,地龙17个,防风18个,筛选得到固本平喘剂关键成分,包括补骨脂黄酮类、补骨脂查耳酮类、汉黄芩素、补骨脂酚、β-谷甾醇等;通过GenCards、OMIM数据库剔除重复后,共收集支气管哮喘潜在靶点2358个。将固本平喘剂和支气管哮喘靶点进行映射取交集共得到237个交叉靶点,即固本平喘剂治疗支气管哮喘潜在作用靶点。以degree值大于二倍均值的靶点为PTGS2、ESR1、ACHE、ESR2、PTGS1、DPP4、ADORA3,degree值排名前5的靶蛋白为PIK3CA、MAPK3、MAPK1、TP53、AKT1。主要涉及PI3K-Akt信号通路、TNF信号通路、趋化因子信号通路、FoxO信号通路、MAPK信号通路、Toll样受体信号通路、T细胞受体信号通路等。结论:固本平喘剂治疗支气管哮喘潜在作用靶点有PTGS2、ESR1、ACHE、ESR2、PTGS1、DPP4、ADORA3、PIK3CA、MAPK3、MAPK1、TP53、AKT1,可能通过抗感染、调节免疫、抑制气道重塑等发挥作用。
