Microscopic Identification of Zhuang Medicine Laportea bulbifera(Sieb. et Zucc.) Wedd.

[Objectives] This study was conducted to investigate the microscopic identification characteristics of Laportea bulbifera(Sieb. et Zucc.) Wedd. [Methods] The characteristics of L. bulbifera leaf, stem and powder were identified by microscopy. [Results] The main microscopic identification characteristics of the tissue structures of L. bulbifera leaf and stem at different positions and L. bulbifera powder were determined. [Conclusions] The microscopic identification results are characteristic, and could serve as the identification basis of L. bulbifera. These results could provide references for the quality control of L. bulbifera.

Study on Quality Standards of Laportea bulbifera(Sieb. et Zucc.) Wedd. in Yao’s Folk-medicine

[Objectives] This study was conducted to establish the quality control standards for Laportea bulbifera(Sieb. et Zucc.) Wedd. [Methods] Microscopic identification and thin layer chromatography were used to identify and determine the moisture, total ash and extract contents. [Results] According to the microscopic results, the stem transection is round and has five longitudinal edges at which the cell wall is obviously thickened. Bristles can be observed. A series of collenchyma cells are arranged closely inside the epidermis. There are several rows of parenchyma cells. The vascular bundles are of different sizes;and the ray part is wide, and at the junction of the ray and the cortex, there are often scattered secretory cells. The center is a broad medulla. The powder is brown. There are many starch grains. The bristles are unicelluar, and have warty protrusions and expanded base. The fibers are bundled, and the cells are large. The epidermal cells are in the shape of an elongated spindle, in a mosaic arrangement, and the cell wall is slightly thickened. From the thin layer identification chromatograms of tested L. bulbifera, it can be seen that spots were observed at the same positions as the control medicinal material, and the durability of the method was good. The extract content should not be less than 12.00% by hot extraction with water as solvent, and not be less than 3.00% by cold extraction with ethanol as solvent. The moisture content should not be more than 16.50%. The total ash content should not be more than 14.00%. The acid-insoluble ash content should not be more than 2.50%. [Conclusions] The microscopic identification results are reliable and can be used as the identification basis of L. bulbifera. The thin layer identification method and the test results can provide a basis for quality control of L. bulbifera.

红禾麻入血成分治疗类风湿性关节炎的作用机制

目的 基于网络药理学和分子对接的方法探究红禾麻入血成分治疗类风湿性关节炎(rheumatoid arthritis,RA)的作用机制。方法 在数据库中预测入血成分和疾病相关靶点,获取两者的共有靶点并运用String数据库分析蛋白-蛋白相互作用关系。利用Metascape数据库对共有靶点进行基因功能注释(Gene Ontology,GO)和京都基因与基因组百科全书(Kyoto Encyclopedia of Genes and Genomes,KEGG)富集分析;建立红禾麻入血成分-靶点网络和入血成分-靶点-信号通路网络图,综合筛选关键靶点;运用AutoDock vina软件对入血成分与关键靶点进行分子对接验证。结果 红禾麻入22个血移行成分和代谢产物作用于292个疾病靶点;INS、IL-6、MAPK3及TNF等可能是红禾麻治疗RA的关键靶点,涉及对细胞氮化合物反应、激素刺激反应和有机氮化合物反应等生物过程,主要涉及的传导途径是TNF信号通路与Th17细胞分化等。分子对接结果显示,黄酮类和酚酸类可能是红禾麻治疗RA的主要活性成分,与关键靶点产生较强的亲和力。结论 红禾麻治疗RA具有“多成分、多靶点、多途径”的特点,可能的机制是红禾麻的黄酮类和酚酸类成分作用于MAPK3、PTGS2、TNF及IL-6等蛋白,并通过调节Th17和TNF等相关信号通路起治疗RA的作用。本研究可为红禾麻的深入开发和利用提供一定的参考数据。

红活麻总香豆素的制备工艺研究

目的:研究红活麻总香豆素的制备工艺。方法:通过正交设计试验选择红活麻总香豆素的最佳提取条件,采用大孔吸附树脂对红活麻总香豆素进行纯化,紫外分光光度法测定总香豆素的含量。结果:红活麻总香豆素的最佳提取工艺为以4倍体积70%乙醇,提取3次,每次1.5 h。HPD300大孔树脂分离纯化红活麻总香豆素效果最佳,其工艺条件为:上样浓度0.4 g生药/mL,上样体积为30 mL,流速为2 BV/h,先用4 BV的蒸馏水除杂,再用4BV的70%乙醇洗脱;得率可达52%以上。结论:该方法适合于制备红活麻总香豆素,工艺的稳定性和重复性较好。

民族药珠芽艾麻化学成分研究

目的:对荨麻科艾麻属珠芽艾麻药材进行化学成分研究。方法:经70%乙醇回流提取,通过硅胶柱层析等技术,进行分离纯化,结合理化性质及各种波谱数据分析鉴定其化学结构。结果:从珠芽艾麻的根中分离并鉴定了6个化合物,分别是:β-谷甾醇(1)、β-胡萝卜苷(2)2、2,'-oxy-bis(1-phenylethanol)(3)、1-(2-phenylcarbonyloxy ac-etyl)benzene(4)、亚油酸甲酯(5)和14,-二苯基-14,-丁二酮(6)。结论:所有化合物均为首次从该植物中分离得到,其中化合物3和4为首次报道的天然产物。

基于RAW264.7抗炎细胞模型对红活麻活性部位的筛选及其化学成分研究

目的研究红活麻的抗炎活性部位及其化学成分。方法萃取法制备不同极性部位,采用脂多糖(LPS)刺激小鼠巨噬细胞RAW264.7模型,检测红活麻不同提取部位对NO释放量的影响,考察其抗炎活性;采用硅胶柱色谱和ODS柱色谱技术对红活麻抗炎活性部位的化学成分进行分离纯化,运用波谱分析技术鉴定化合物结构。结果利用SAS 9.30软件对给药组和LPS组NO的含量进行t检验,比较组间是否存在差异;与LPS组相比,石油醚部位对NO的释放量影响不明显(P<0.05)。二氯甲烷部位、乙酸乙酯部位和正丁醇部位在浓度为15.5、31.25、62.5μg/m L时,均表现出对NO释放量有一定的影响,且差异具有统计学意义(P>0.05)。当给药浓度都在62.5μg/m L时,石油醚部位、二氯甲烷部位、乙酸乙酯部位和正丁醇部位分别对NO释放量的抑制为11.42%、21.01%、33%、26.96%,故乙酸乙酯部位对NO释放量影响最大,且具有剂量依赖性;从红活麻乙酸乙酯部位中分离得到7个化合物,分别鉴定为:(1)!-Sitosterol;(2)5-Hydroxymethyl-2-furancarboxaldehyde;(3)4-hydroxy-5-methoxy-benzoic acid;(4)Isomeranzin;(5)Dioctyl phthalate;(6)Dibutyl phthalate;(7)Caffeic acid。结论乙酸乙酯部位为红活麻抗炎活性部位。2,4,5,6为首次从该属中分离得到,7为首次从该植物中分离得到。

基于指纹图谱和多指标定量测定的苗药红禾麻质量控制研究

目的建立合理的苗药红禾麻Laporteabulbifera质量控制方法。方法采用高效液相色谱建立以指纹图谱为特征的多指标定性定量控制方法,对红禾麻12批次的药材进行质量控制,运用指纹图谱相似度评价系统对所测定的指纹图谱进行评价。结果建立了同时测定红禾麻药材中10个成分(新绿原酸、绿原酸、隐绿原酸、芦丁、异槲皮苷、木犀草苷、山柰酚-3-O-芸香糖苷、槲皮苷、表没食子儿茶素、表儿茶素)的多指标质量控制方法,该方法的线性关系、精密度、重复性和稳定性良好,加样回收率为95.89%~98.62%、RSD<3%。同时测定了12批次红禾麻药材的指纹图谱并建立了共有模式,标定共有峰20个,12批次红禾麻药材指纹图谱相似度为0.805~0.931。结论所建立的基于指纹图谱和多指标含量测定的红禾麻质量控制方法,灵敏度高、准确度好、稳定可靠,为控制和评价红禾麻药材的内在质量提供科学依据。