板蓝根及其制剂中精氨酸和脯氨酸的配位毛细管电泳检测

以配位作用毛细管电泳为手段,采用非衍生直接紫外吸收检测,对板蓝根注射液中各组分进行分析.考察运行缓冲液的浓度和酸度、运行电压、进样时间以及毛细管内径等因素对分离和检测的影响.在优化条件下,即运行缓冲液为30 mmol/L CuSO_4水溶液,pH=3.26,分离电压22 kV,位差进样40 S,毛细管内径50.0μm,检测波长254 nm,对其中含量最多的2种氨基酸--精氨酸和脯氨酸进行定量分析.分别考察其线性范围、检测限以及重现性.结果测得板蓝根注射液中精氨酸的含量为0.63 mmol/L,脯氨酸的含量为25.7 mmol/L.并在相同的优化条件下,对天然产物板蓝根提取物进行分析.结果测得其中精氨酸的质量分数为0.027,脯氨酸的质量分数为0.054.     

考马斯亮蓝G-250染色法测定草乌中可溶性蛋白质含量

采用考马斯亮蓝G-250染色法对草乌药材中可溶性蛋白质含量进行了测定,建立了快速、灵敏的测定蛋白质的方法.结果表明,考马斯亮蓝G-250染色法简单、迅速,且相对较为准确,是测定低浓度蛋白质含量的有效方法.     

山麦冬多糖片含量测定与急性毒性研究

对山麦冬多糖片进行了含量测定,每片含多糖49.99 %±0.9 %;并研究了其急性毒性,山麦冬多糖的小鼠最大耐受量为26.68 g生药/kg,相当于临床用药量的711倍.     

Determination of Polysaccharide in Radix pseudostellariae Extract by Size-Exclusion High-Performance Liquid Chromatography

A simple size-exclusion high-performance liquid chromatographic method was developed for rapid molecular mass screening to determine the average molecular mass, polydispersity, and quantity of Taizishen polysaccharides extract. The screening used a TOSOH TSK-GEL G3000SW high-performance liquid chromatographic column with 0.1 mol/L NaNO3 buffer as the mobile phase and refractive index detec- tor. The molecular mass calibration curve was linear for polysaccharide standards from 10 to 100 kDa with a correlation coefficient of 0.9991. The method can be used to analyze the quantity, average molecular mass, and polydispersity of polysaccharides. In addition, the screening method is suitable for quality control of polysaccharide preparations in Chinese medicines and pharmaceutical products.     

基于网络药理学和分子对接研究三七抗类风湿关节炎的分子机制

通过中药系统药理学数据库与分析平台获取三七的主要活性成分及其相关靶点;通过GeneCards数据库预测类风湿关节炎相关靶点,并运用Uniprot数据库标准化蛋白名称,取三七-类风湿关节炎的交集靶点;通过STRING平台进行蛋白质-蛋白质相互作用分析;采用Metascape平台进行GO(gene ontology)功能分析和KEGG(Kyoto encyclopedia of genes and genomes)信号通路富集分析;采用Cytoscape3.7.2构建活性成分-靶点-信号通路相互作用网络;利用AutoDock Vina 1.1.2软件对关键靶点和成分进行分子对接。结果表明:通过筛选获得三七核心活性成分7种,三七-类风湿关节炎共同作用靶点100个,其中核心靶点包括AKT1、IL6、VEGFA、TNF、TP53、JUN、CASP3、PTGS2等;GO分析获得1 064条信号通路,KEGG分析得到102条信号通路,其中与类风湿关节炎相关的信号通路包括AGE-RAGE、MAPK、TNF、IL-17以及HIF-1等;分子对接结果显示关键靶点与成分具有较好的结合活性。研究认为三七抗类风湿关节炎可能是通过对物质代谢、信号转导、炎症反应等多靶点及多通路的调节从而发挥作用。     

Capillary electrophoresis determination of six bioactive constituents in San-huang-hsieh-hsin-tang

A capillary electrophoretic method for simultaneous determination of six bioactive ingredients (berberine, palmatine, baicalin, sennoside B, emodin, and sennoside A) in the Chinse herbal formula San-huang-hsieh-hsin-tang was established. A carrier composed of aqueous buffer solution (50 mM sodium cholate, 15 mM sodium dihydrogen phosphate, and 4.25 mM sodium borate)-acetonitrile (3:2) was found to be the most suitable electrolyte for this separation. Contents of these constituents in a non-pretreated methanol-water extract of San-huang-hsieh-hsin-tang sample could be easily determined within 20 min. The effects of borate, cholate, and organic modifier (acetonitrile) concentration of the carrier on the migration behavior of the solutes were also studied.     

A rapid method for simultaneous determination of 14 phenolic compounds in Radix Puerariae using microwave-assisted extraction and ultra high performance liquid chromatography coupled with diode array detection and time-of-flight mass spectrometry

A microwave-assisted extraction (MAE) and ultra high performance liquid chromatography coupled with diode array detection and time-of-flight mass spectrometry (UHPLC-DAD-TOF-MS) method was developed for simultaneous determination of 14 phenolic compounds in the root of Pueraria lobata (Wild.) Ohwi and Pueraria thomsonii Benth. Operational conditions of MAE were optimized by central composite design (CCD). The optimized result was 65% ethanol as extraction solvent, 17 mL of extraction volume, 100 °C of extraction temperature and 2 min of hold time. A Zorbax SB C₁₈ (50 mm × 4.6 mm I.D., 1.8 μm) and gradient elution were used during the analysis. The chromatographic peaks of 14 investigated compounds in samples were successfully identified by comparing their retention time, UV spectra and TOF mass data with the reference substances. All calibration curves showed good linearity (r > 0.9997) within the test ranges. The intra-day and inter-day variations were less than 1.77% and 2.88%, respectively. The developed method was successfully applied to determine the investigated compounds in 10 samples of Radix Puerariae Lobatae and Radix Puerariae Thomsonii, respectively. The result indicated that MAE and UHPLC-DAD-TOF-MS system might provide a rapid method for the quality control of Radix Puerariae.     

偏最小二乘回归分析法在黄芩抑菌谱-效关系及数学模型研究中的应用

以黄芩药材指纹图谱及其对金黄色葡萄球菌抑菌率为基础数据，采用偏最小二乘回归分析法（PLS）进行数据的谱-效相关性分析，并建立数学模型。结果表明，黄芩中有5个成分对抑菌率的影响较大，建立模型的药效预测值偏差在10%以内，能够较好地预测药效。该方法及所建立的数学模型能成为预测黄芩抑制金黄色葡萄球菌的药效作用的一种有效的手段。     

Preparative enrichment and separation of astragalosides from Radix Astragali extracts using macroporous resins

The enrichment and separation of astragalosides I–IV (AGs I–IV) were studied on eight macroporous resins in the present study. SA‐3 resin offered the best adsorption and desorption capacities for AGs I–IV than other resins. The models of adsorption kinetics were investigated in order to elucidate the mechanism of adsorption. The pseudo‐second‐order model was the better choice than the pseudo‐first‐order model to describe the adsorption behavior of AGs I–IV onto SA‐3 resin. The equilibrium experimental data were well fitted to Langmuir and Freundlich isotherms. SA‐3 resin adsorption chromatography tests were carried out to optimize the separation process of AGs I–IV from Radix Astragali extracts. With the optimum parameters for adsorption and desorption, the contents of AGs I–IV were 8.78‐, 11.60‐, 10.52‐ and 11.28‐fold increased with the recovery yields being 65.88, 90.92, 84.25 and 94.17%, respectively. The preparative enrichment and separation of AGs I–IV from Radix Astragali extracts can be easily and effectively achieved by SA‐3 resin adsorption chromatography. The developed methodology can also be referenced for the separation of other active constituents from herbal materials and manufacture of Radix Astragali products.     

泰山四叶参对小鼠肺癌的作用及机制初探

研究泰山四叶参对乌拉坦诱导的小鼠肺癌的作用及其可能的作用机理.用乌拉坦诱导小鼠建立肺癌模型,随机分组在不同时间饲喂泰山四叶参粗多糖,观察小鼠生存状况,记录其体重变化、内脏(胸腺、脾、肝脏、肺、心脏)指数和存活时间,检测巨噬细胞吞噬功能和血清、肝脏、肺中SOD活性.结果发现泰山四叶参能改善乌拉坦所致肺癌小鼠的生存质量,提高了小鼠的胸腺指数和脾脏指数,增强肝脏中SOD活性,显著延长了其存活时间.因此,泰山四叶参对乌拉坦诱导的小鼠肺癌有一定的预防和抑制作用,主要机制可能与其免疫调节、抗氧化作用有关.