毛细管电泳和微流控芯片在药物筛选中的应用

药物筛选是现代药物开发流程中测试和获取特定生理活性化合物的一个步骤.毛细管电泳技术由于具有样品消耗量小、速度快、柱效高以及所用溶液体系较接近生物体液组成等特点,已经成为一种非常具有潜力的药物及先导化合物的高效筛选工具.文中就毛细管电泳技术在药物筛选中的最新应用情况进行综述,具体从测定药物解离常数pKa值、药物脂水分配系数(logP)、药物与蛋白质的结合常数的测定以及手性药物筛选等方面进行论述,同时也探讨了微流控芯片技术在高通量药物筛选方面的最新研究进展.     

毛细管电泳技术在研究生物分子间相互作用和药物筛选中的应用

毛细管电泳技术是八十年代初发展起来的一种新型分离分析技术。由于其分析时间短，样品消耗少，分离度高，应用灵活，能够在生理条件或者接近生理条件的缓冲液中运行等优点，广泛应用于研究生物分子间的相互作用。本文就毛细管电泳研究生物分子间相互作用的基本原理，及其在生物分子间相互作用和药物筛选中的应用进行了综述。对不同的分子间相互作用体系，如蛋白质-蛋白质／多肽，蛋白质-DNA／RNA，蛋白质-糖，抗原-抗体，蛋白质-药物，脂质体-蛋白质／药物等进行了论述。同时也探讨了毛细管电泳从组合化学库中筛选先导药物及其在药物筛选中的应用。     

电泳技术在药物分析中的应用

本文概述了电泳技术产生的背景以及发展历程,简要介绍了几种常用的电泳技术的原理、特点以及在药物分析中的应用,尤其是高效毛细管电泳法在许多科学试验中被广泛应用并取得了卓越的成效.     

高效毛细管电泳法在体内药物分析的应用

目的:介绍高效毛细管电泳技术近年来在体内药物分析领域的应用情况。方法:查阅相关文献,进行综合、分析和归纳。结果:高效毛细管电泳技术在体内化学药物、滥用药物、抗菌药物、生化药物和对映体药物分析中得到了广泛的应用。结论:高效毛细管电泳技术具有高效、快速、分离模式多等特点,在体内药物分析中具有广阔的应用前景。     

毛细管电泳在中药研究中的应用

简要的综述了毛细管电泳技术在中药研究的各个方面的应用.     

高效毛细管电泳在中药指纹图谱应用

综述了南效毛细管电泳技术的基本原理及近几年高效毛细管电泳技术在中草药、动物药和复方制剂指纹图谱建立中的应用,并与高效液相之间的对比.     

高效毛细管电泳（HPCE）在中药分析中的应用

毛细管电泳是近年发展起来的一项新型分析技术。因其兼有电泳和色谱技术的双重优点,以高效、高速、高灵敏度和高自动化而被认为是九十年代最重要的分离、分析手段之一。尤其近几年,无论从理论研究还是实际应用,都呈现了迅速发展的势头。本文介绍了毛细管电泳技术的基本概述、在中药分析中的应用及发展趋势。     

高效毛细管电泳在临床药理中的应用

目的：总结近年来高效毛细管电泳技术在临床药理学中的应用。方法：从高效毛细管电泳的类型、特点、原理及在治疗药物监测及样品分析等方面进行综述。结果：介绍了该项技术在治疗药物监测和样品分析中的优势、前景及诊断治疗方面的价值。结论：该项技术值得在临床药理工作中大力推广。     

毛细管电泳技术在黄酮类化合物分析中的应用进展

综述植物药和中药中黄酮类化合物的电迁移分析方法,对毛细管电泳技术的分离原理进行简要的阐述,列举2005～2011年部分黄酮化合物的毛细管电泳分析实例.天然药物黄酮化合物毛细管电泳技术主要有毛细管区带电泳、胶束电动毛细管电泳和毛细管电色谱3种分离模式.     

毛细管电泳技术及其在基因药物研究中的应用

毛细管电泳(capillary electrophoresis,CE)是20世纪80年代初发展起来的一种新型分离分析技术,乃经典电泳技术和现代微柱分离有机结合的产物,是继高效液相色谱(HPLC)之后,分析科学领域的又一次革命.与传统的分离方法相比,CE具有高效、快速、灵敏、样品用量少等特点,使其成为极为有效的分离技术,广泛应用于分离蛋白质、糖类、核酸等多种物质[1].     

Advances in capillary electrophoresis and the implications for drug discovery

Introduction: Many screening platforms are prone to assay interferences that can be avoided by directly measuring the target or enzymatic product. Capillary electrophoresis (CE) and microchip electrophoresis (MCE) have been applied in a variety of formats to drug discovery. CE provides direct detection of the product allowing for the identification of some forms of assay interference. The high efficiency, rapid separations, and low volume requirements make CE amenable to drug discovery.

Areas covered: This article describes advances in capillary electrophoresis throughput, sample introduction, and target assays as they pertain to drug discovery and screening. Instrumental advances discussed include integrated droplet microfluidics platforms and multiplexed arrays. Applications of CE to assays of diverse drug discovery targets, including enzymes and affinity interactions are also described.

Expert opinion: Current screening with CE does not fully take advantage of the throughputs or low sample volumes possible with CE and is most suitable as a secondary screening method or for screens that are inaccessible with more common platforms. With further development, droplet microfluidics coupled to MCE could take advantage of the low sample requirements by performing assays on the nanoliter scale at high throughput.     

Liquid chromatography and capillary electrophoresis analysis of polyanionic quinobene

Quinobene is the tetrasodium salt of an organic tetrasulphonic acid. Its unusual solubility characteristics makes the development of LC analysis difficult. However, a specific, precise and accurate LC assay was eventually achieved for quinobene. The assay required gradient elution and was not efficient for quinobene with respect to plate number. As an alternative, a capillary electrophoresis (CE) assay was also developed for quinobene. The CE assay was comparable to the LC assay in precision and accuracy. It was unaffected by the unusual solubility characteristics of quinobene and was more specific, efficient and rugged than the LC assay.     

毛细管电泳法和分光光度法测定有机氮源中可溶性无机磷的比较

通过优选缓冲液体系，建立了阴离子的毛细管电泳（CE）检测法，以测定天然有机氮源中可溶性无机磷的含量，并与分光光度法进行了比较。结果显示，分光光度法检测限较低，但CE法线性范围更广，结果准确，在自动化快速分析方面亦有较大优势，更适于微生物培养过程中离子含量的动态分析。     

2-甲基-β-环糊精作为手性选择剂对5种药物对映体的毛细管电泳拆分研究

目的以2-甲基-β-环糊精(2-O-methylated-β-cyclodextrin,2-O-M-β-CD)为手性添加剂,利用毛细管电泳法(capillary electrophoresis,CE)对消旋体药物甲溴后马托品、氧氟沙星、酮康唑、利阿唑和卡维地洛进行拆分研究。方法考察了背景电解质溶液的pH值、2-O-M-β-CD浓度、缓冲盐浓度对分离的影响,优化了分离条件。结果在最佳分离条件下,甲溴后马托品、氧氟沙星、酮康唑、利阿唑对映体达到完全分离,分离度分别为3.6、2.8、1.7、1.5;卡维地洛对映体分离度达到1.4。结论所建立的毛细管电泳法适于除卡维地洛外其余4种药物的对映体分离。     

Microchip electrophoretic separation systems for biomedical and pharmaceutical analysis.

The application of microchip capillary electrophoresis (CE) systems to biomedical and pharmaceutical analysis is described and reviewed. Fabrication, instrumentation, and operation of the systems are discussed. An overview of applications is presented, covering four main areas: DNA sequencing, genetic analysis, immunoassays, and protein and peptide analysis. These systems have the potential to dramatically change the way that biochemical analyses are performed.     

Applications of Capillary Electrophoresis in Pharmaceutical Analysis

The role of capillary electrophoresis (CE) in the analysis of peptides/proteins, chiral pharmaceuticals, and other small-molecule drugs has been reviewed. Potential uses of CE range from purity and structural confirmation to a micropreparative technique. Strategies for the prevention of protein wall adsorption include the use of extreme pH values, surface-modified capillaries, and high ionic strengths employing salts of alkali metals or by the addition of zwitterionic surfactants to the background electrolyte. Chiral separations of amino acids and other racemic pharmaceuticals have been achieved by micellar electrokinetic chromatography or by the introduction of cyclodextrins/modified cyclodextrins or other reagents to the running buffer. Applications of capillary electrophoresis to the analysis of small-molecule pharmaceuticals include determinations of drugs and/or excipients in various pharmaceutical preparations and the analysis of miscellaneous pharmaceuticals in standard solutions and biological fluids. The complementary nature of capillary electrophoresis and HPLC, in addition to future expectations of CE in pharmaceutical analysis, is discussed.     

趋磁性细菌研究进展

本文综述了趋磁性细菌的研究进展情况、特征及分布,并且对磁小体的特性和形成过程做了阐述.由于趋磁性细菌及其体内的磁小体自身的许多优点,现在已经被广泛地应用于许多领域.而且可以利用其趋磁的特点,运用毛细管电泳对其进行分离鉴定和定量分析.     

Development of an on-site measurement system for salivary stress-related substances based on microchip capillary electrophoresis technology

Psychological stress is of major importance to all age groups in recent years, and may lead to mental disorder and various diseases. An objective and quantitative method for measuring salivary stress-related substances is highly desired because saliva collection is easy, stress free and noninvasive. We have developed a rapid and easy-to-use analytical tool for the measurement of cortisol and secretory immunoglobulin A (sIgA) based on microchip technology, immunoselectivity and electrophoretic separation technique. Performing immunoreaction and capillary electrophoresis (CE) separation on microchips is a promising technique for on-site determination of biogenic substances, and has a few advantages over conventional immunoassay methods: reduced sample size, shortening analysis times, high separation efficiency, reduced cost, and downsizing of analytical system. At this stage of our research, some preliminary prototypes of a high-sensitive microchip CE instrument were constructed to determine the stress-related substances in real saliva samples. However, there is not enough detection sensitivity for cortisol analysis. On the other hand, sIgA was successfully analyzed using a laboratory-built microchip CE system and optimal analytical conditions. The sIgA determination is rapid compared with a conventional immunoassay method, and provides an acceptable degree of repeatability and recovery. In the future, microchip technologies will enable total automation and integration of sample preparation. This research has widespread future potential for monitoring multiple stress-related markers within minutes from a trace of saliva, and can contribute to disease prevention and overall good health.     

Capillary Electrophoresis in Pharmaceutical Analysis

Capillary electrophoresis (CE) is a separation technique particularly suited to the analysis of pharmaceutical compounds. This review offers a detailed discussion of the four common modes of detection coupled to CE—UV absorption, fluorescence, electrochemical, and mass spectrometry—and gives examples of the use of these methods in pharmaceutical analyses. Sample preparation and pretreatment techniques used for CE separations are described, as well as methods of preconcentration including hydrophobic retention, affinity concentration, sample stacking, and isotachophoresis. The use of affinity CE, chiral CE, and capillary gel electrophoresis for analysis of pharmaceuticals is covered in detail, and recent advances in capillary electrochromatography and CE on a chip are also discussed.