Determination of sugars in Chinese traditional drugs by CE with amperometric detection

A simple, fast and reliable method, based on capillary zone electrophoresis with amperometric detection, for the separation and determination of sucrose, glucose, and fructose in Chinese traditional drugs, namely Astragalus Membranceus (Fish.) Bge, Angelica and Codonopsis pilosula (Franch.) Nannf. was described in this paper. A copper disk electrode was used as working electrode. The optimal conditions of separation and detection were 0.05 mol/l sodium hydroxide buffer (pH 12.7), 5 kV for the separation voltage and +0.65 V (vs. Ag/AgCl) for the detection potential. The linear ranges were from 5.0x10(-6) to 5.0x10(-4) mol/l for all three sugars. The all regression coefficients were more than 0.999. The detection limits were 1.0x10(-6) mol/l for glucose and fructose, and 4.0x10(-6) mol/l for sucrose. The method built in this paper was directly applied to the separation and determination of the three sugars in three Chinese traditional drugs without prior derivatization, and the content for every sugar in the drugs was first assayed. The assay results were satisfactory.     

中药有效成分调节细胞骨架功能的研究进展

细胞骨架是胞内蛋白纤维聚合物组成的动态网络结构,参与细胞多种生理活动,如维持细胞内部结构,稳定细胞形态,调节细胞分裂、胞吞胞吐、能量转换和信息传递等。细胞骨架功能障碍已成为神经系统疾病、心血管疾病、肿瘤等多种疾病的表征。研究显示,许多中药有效成分可以调节相关疾病靶细胞骨架功能。本文从中药有效成分调节相关疾病靶细胞骨架功能出发,综述近5年国内外相关研究进展,以期阐释中药有效成分作用特点,并为防治相关疾病提供参考。     

基于碳基纳米材料的中药有效成分电化学检测技术研究

本课题组采用原位聚合、溶液混合、共沉淀、熔融混合等技术制备一系列基于碳纳米管、石墨烯及其复合材料复合材料的检测电极,与毛细管电泳和微流控芯片等技术联用建立中药有效成分电化学检测技术,与常规金属和普通碳电极相比,检测灵敏和电极抗污染能力获得大幅提高,在中药有效成分的检测中具有良好的应用前景。     

基于碳基纳米材料的中药有效成分电化学检测技术研究

本课题组采用原位聚合、溶液混合、共沉淀、熔融混合等技术制备一系列基于碳纳米管、石墨烯及其复合材料复合材料的检测电极,与毛细管电泳和微流控芯片等技术联用建立中药有效成分电化学检测技术,与常规金属和普通碳电极相比,检测灵敏和电极抗污染能力获得大幅提高,在中药有效成分的检测中具有良好的应用前景.     

The traditional Chinese medicines treat chronic heart failure and their main bioactive constituents and mechanisms

Chronic heart failure(CHF) is a severe public health problem with increasing morbidity and mortality, any treatment targeting a single session is insufficient to tackle this. CHF is characterized by reduced cardiac output resulting from neurohumoral dysregulation and cardiac remodeling, which might be related to oxidative stress, inflammation, endoplasmic reticulum stress, apoptosis, autophagy, mitochondrial function, and angiogenesis. These molecular mechanisms interact with each other through ...     

中药中农药残留量研究进展

综述了近年来有关中药中残留农药的提取、净化及其定量分析方法的研究进展，并讨论了几种新的提取、净化及定量分析技术在中药农药残留分析中的应用前景。     

GC-MS法同时测定中药材中29种农药残留量

目的建立一种可同时对29种有机氯、有机磷类农药残留量进行定量检测的方法。方法利用GC-MS技术,配合负化学源检测器,采用选择离子检测法(SIM)进行定量,以石油醚-丙酮混合溶剂为洗脱溶剂,样品通过Florisil硅土柱净化,选择环氧七氯为内标物。结果对48种中药材进行了检测;除敌敌畏、杀虫脒、磷丹及三唑磷外,其余农药的检测限都在0.2～15 g.kg-1之间;以9种中药材为例检测,大部分农药的回收率在70%～120%之间。结论该方法简单、快捷、经济,分析结果达到农残分析的要求,适合大批量样品的同时检测。     

中药中玉米赤霉烯酮的残留测定

目的建立薏苡仁、麦芽、绿豆中玉米赤霉烯酮的测定方法.方法样品经90%乙腈提取、免疫亲和柱净化后,用高效液相色谱-荧光检测器法进行分析测定,阳性样品采用LC-MS-MS进一步确证.结果玉米赤霉烯酮在125～3 750 pg范围内进样量与峰面积呈良好的线性关系,相关系数为0.999 9,加样回收率在96.6%～114.7%之间.结论本法重复性好、灵敏度高、定量快速准确,可作为薏苡仁、麦芽、绿豆中玉米赤霉烯酮残留的测定方法.     

Analysis of bioactive components in traditional Chinese medicines by molecular biochromatography with alpha1-acid glycoprotein stationary phase

Molecular biochromatography with alpha1-acid glycoprotein (AGP) stationary phase was proposed to screen and analyse the biologically active components in traditional Chinese medicines (TCMs) with extracts from Radix Salviae miltiorrhizae as a tested sample. More than ten peaks were resolved based on their affinity to AGP. The effects of concentrations of acetonitrile, pH, concentration of inorganic salt and temperature on the retention behaviors of several major active components were also investigated, and it was found that the hydrophobic effect is the major contributor to retention. Tanshinone IIA was identified as one of the principal bioactive components, which is the marker for the quality control of Radix Salviae miltiorrhizae and a complicated remedy named YiXiTongMai. The amount of tanshinone IIA in Radix Salviae miltiorrhizae and YiXiTongMai determined by this method was 2.9 mg/g (net weight, RSD 4.9%, n=5) and 0.078 mg/g (net weight, RSD 2.5%, n=3), respectively. The possibility for fast differentiation of the TCM sources was also studied by the comparison of the fingerprint of chromatograms for eight typical TCMs on the AGP column. It was observed that different TCMs showed different fingerprint characteristics. Even for the same plant, Rhizoma cimicifugae from three different geographical sources, although there were common characteristics, distinct differences in types and concentrations of biologically active components were clearly observed. It was shown that molecular biochromatography was an effective and fast way for the analysis and screening of biologically active compounds in traditional Chinese medicines.     

中药化学成分体内代谢产物的制备方法

传统中药多为口服用药,其在体内发挥药效的物质可能是中药中的化学成分,还可能是中药成分在体内的代谢产物,中药产生毒副作用和不良反应的原因也可能与中药成分的体内代谢产物有关。而迄今中药成分代谢产物的研究多局限在分析和结构推测鉴定水平,仅对少数可通过简单方法间接获取的代谢产物进行了较深入的生物学研究。因此,代谢产物的获取是深入研究其生物活性,进而明确中药药效和毒效的关键物质基础。本文结合本课题组近几年来的研究成果,对目前中药活性成分体内代谢产物的制备方法进行了总结和综述,希望能够为中药成分的体内代谢研究提供借鉴。     

细胞膜色谱技术应用于中药活性成分筛选的研究进展

目的了解细胞膜色谱技术在中药活性成分筛选应用中的研究进展,为该技术的进一步开发和应用提供参考。方法通过查阅国内外相关文献,进行总结、分析,对细胞膜色谱技术在中药活性成分筛选中的应用进行综述。结果细胞膜色谱技术已成功应用于中药药效物质基础研究,对于中药活性成分的筛选涉及到多个方面,包括抗炎镇痛、抗心血管疾病、抗糖尿病和抗肿瘤等活性成分,并在不断发展和完善。结论细胞膜色谱技术还存在一些问题,随着对该技术研究的不断深入,其在中药药效物质基础研究等方面具有广阔的前景。     

镇静安神类中成药及保健食品中非法添加化学成分的快速筛查方法研究

目的：建立镇静安神类中成药及保健食品中非法添加的地西泮等14种化学成分的薄层色谱快速检测方法。方法：样品经甲醇提取后素奇硅胶GF254薄层板上：以二氯甲烷-甲苯-丙酮-甲醇（8：8：3：1）为展开剂,检测地西泮等10种苯并二氮杂卓类添加成分;以正庚烷-甲苯-丙酮-三乙胺（6：5：4：1）为展开剂,检测巴比妥等4种巴比妥类添加成分;展开后置紫外光灯（254nm）下检视。结果：在选定的色谱条件下,14种化学成分能得到较好的分离。结论：本法快速、简便,可作为镇静安神类中成药及保健食品中非法添加地西泮等14种化学成分的快速筛查方法。     

5种补益类中药中重金属的含量测定

目的测定 5种补益类中药材中有害重金属元素铅、镉、砷、汞、锡的含量。方法原子吸收分光光度法、比色法、原子荧光光度法分别测定含量。结果与结论表明此类药材中都含有一定量的有害重金属 ,且某些药材中重金属含量严重超标     

ICP-OES法测定6种矿物类中药材中Ca、Fe、Mg、Na的含量

目的：建立电感耦合等离子体发射光谱（ICP-OES）法测定6种矿物类中药材中4种普通轻元素含量的方法。方法：样品经过微波消解,采用ICP-OES法同时测定Ca、Fe、Mg、Na元素含量。结果：建立的ICP-OES法线性相关系数r>0.9997,回收率在90.2%～108.4%之间,RSD<10.9%。结论：本研究建立的微波消解-ICP-OES法快速、准确、简便,是矿物类中药材部分元素测定的一种较好方法。     

微波消解-原子荧光光谱法测定中药材中铅、镉、砷、汞、锑的含量

目的建立中药材中铅、镉、砷、汞、锑的原子荧光光谱检测方法。方法采用微波消解法消解中药材样品后,用原子荧光光谱法测定其中的铅、镉、砷、汞、锑的含量,并对测定方法进行了方法学考察。结果对于所测元素,校准曲线的相关系数r>0.999 2,回收率为90.0%~107.4%,RSD<7%。结论该方法快速、简便、准确且灵敏度高,为中药材中重金属含量测定提供了较好的方法,用本方法测定标准样品达到满意效果。     

Research progress on antiviral constituents in traditional Chinese medicines and their mechanisms of action

ContextViruses have the characteristics of rapid transmission and high mortality. At present, western medicines still lack an ideal antiviral. As natural products, many traditional Chinese medicines (TCM) have certain inhibitory effects on viruses, which has become the hotspot of medical research in recent years.ObjectiveThe antiviral active ingredients and mechanisms of TCM against viral diseases was studied in combination with the pathogenesis of viral diseases and antiviral effects.Materials and methodsEnglish and Chinese literature from 1999 to 2021 was collected from databases including Web of Science, PubMed, Elsevier, Chinese Pharmacopoeia 2020 (CP), and CNKI (Chinese). Traditional Chinese medicines (TCM), active ingredients, antiviral, mechanism of action, and anti-inflammatory effect were used as the key words.ResultsThe antiviral activity of TCM is clarified to put forward a strategy for discovering active compounds against viruses, and provide reference for screening antivirus drugs from TCM. TCM can not only directly kill viruses and inhibit the proliferation of viruses in cells, but also prevent viruses from infecting cells and causing cytophilia. It can also regulate the human immune system, enhance human immunity, and play an indirect antiviral role.Discussion and conclusionBased on the experimental study and antiviral mechanism of TCM, this paper can provide analytical evidence that supports the effectiveness of TCM in treating virus infections, as well as their mechanisms against viruses. It could be helpful to provide reference for the research and development of innovative TCMs with multiple components, multiple targets and low toxicity.     

Live cell extraction and HPLC-MS analysis for predicting bioactive components of traditional Chinese medicines

A novel strategy for predicting bioactive components in traditional Chinese medicines (TCM) using live cell extraction and high performance liquid chromatography-diode array detection-mass spectrometry (HPLC-DAD-MS) analysis was proposed. The hypothesis is that when cells are incubated together with the extract of TCM, the potential bioactive components in the TCM should selectively combine with the cells, and the relative concentrations of the cell-combining components in the suspension medium should decrease, while the cell-combining components would be detectable in the extract of denatured cells. The identities of the cell-combining components could be determined by HPLC-DAD-MS analysis. Using the proposed approach, the potential bioactive components of Danggui Buxue decoction, a commonly used TCM for anaemia, and its compositions, Radix Angelica Sinensis and Radix Astragli for endothelial cells, were investigated. Six compounds in the extract of Danggui Buxue decoction were detected as the components selectively combined with endothelial cells, among them two were contributed by Radix Angelica Sinensis, and four by Radix Astragli. The identities of four of the six potential bioactive compounds were elucidated as ononoside, calycosin, 3-butylphthalide and ligustilide by HPLC-DAD-MS analysis. The results indicate that the proposed approach may be applied to predict the bioactive candidates in TCM.     

从中医药降糖的进步谈新药研发中几个值得关注的问题

中医药降糖疗效不佳始终是一个无法回避的问题,尽管近年来中药降糖取得了较大进步,但仍然存在着种种问题,既影响了中医在治疗重大疾病方面发挥主流作用,也影响了中药新药的研发。文中对糖尿病的古今认识差异、治法差异、药理成果的回归、中药治疗剂量等临床中存在的主要问题进行了探讨,以期对中医药治疗糖尿病及中药新药研发有所启示。     

142例中药不良反应分析

目的探讨近年来中药不良反应的发生情况及发生原因,为临床使用中药提供参考.方法对2001年解放军药品不良反应数据库中的142例中药不良反应报表进行统计分析.结果近几年来,中药不良反应的发生率有所上升,所发生的不良反应涉及药品较广,其中以注射剂居多.结论中药的不良反应逐年增加,发生原因各异,应当引起足够的重视.