毛细管电泳在结构相近多肽蛋白分析分离中的应用

毛细管电泳在结构相近多肽蛋白分析分离中的应用董文玉关福玉校（北京军事医学科学院毒物药物研究所１００８５０）过去１０年间，毛细管电泳（ＣＥ）得到迅速发展，显示其为强有力的分析分离手段［１～３］。而多肽蛋白的分离则是毛细管电泳最常应用的领域，这方面已有综...     

毛细管电泳在体内药物分析中的应用

介绍毛细管电泳的分离模式、特点及其在血浆、血清、尿液药物分析中的应用,说明它的优越性。指出它在体内药物分析中的广阔应用前景。     

高效毛细管电泳及其在蛋白质,多肽分析中的应用

高效毛细管电泳（ＨＰＣＥ）是一种分离效率高、检测灵敏度高、样品用量少的分析技术。本文简述ＨＰＣＥ的研究进展及基本原理,着重介绍了它在蛋白质及多肽的分离、纯度鉴定、性质研究、结构分析、临床检验、药代动力学研究等方面的应用。     

高效毛细管电泳法在药物分析中的应用

高效毛细管电泳法(HPCE)是样品中各组分以高压电场为驱动力，在毛细管中按其淌度和分配系数不同进行高效快速分离分析的一种新技术。HPCE根据不同的分离模式，主要可分为：毛细管区带电泳(Capil—lary zone electrophoresis，CZE)、胶束电动毛细管色谱(Micallar electrokinetic capillary chromatography，     

毛细管电泳免疫分析技术在药物及蛋白检测中的应用

毛细管电泳免疫分析(capillary electophoresis based immunoassay，CEIA)是近几年发展起来的免疫分析方法，它具有样品用量少、测定速度快、分离效果好、易于自动化的特点，并能够解决免疫反应中的“交叉反应”而造成的假阳性问题，可用于血浆、尿液等复杂样品中激素、药物痕量组分的分析测定，在临床化学分析、药物检测等方面有极重要的作用。     

毛细管电泳免疫分析技术在药物及蛋白检测中的应用

毛细管电泳免疫分析(capillary electrophoresis based immunoassay,CEIA)是近几年发展起来的免疫分析方法,它具有样品用量少、测定速度快、分离效果好、易于自动化的特点,并能够解决免疫反应中的"交叉反应"而造成的假阳性问题[1～3],可用于血浆、尿液等复杂样品中激素、药物痕量组分的分析测定,在临床化学分析、药物检测等方面有极重要的作用.     

毛细管区带电泳法及其在药物分析中的应用

高效毛细管电泳法 ( high performance capillary elec-trophoresis,HPCE) [1 ,2 ] 作为一种新型快速高效的分离分析手段 ,近 15年来得到了迅速的发展 ,是当今分析化学公认前沿 ,也是我国分析化学领域与国际先进水平差距最小的分支之一。其已被收入 2 0 0 0年版《中国药典》二部附录[3] ,确定为执行药典 ,考察药品质量所制定的指导性规定。根据不同的分离模式主要可分为毛细管区带电泳 ( CZE) ,胶束电动毛细管争谱 ( MECC) ,毛细管凝胶电泳 ( CGE) ,毛细管等速电泳( CITP) ,毛细管等电聚焦电泳 ( CIEF)以及新近发展的毛细管电色谱 …     

高效毛细管电泳法在滥用药物分析中的应用

高效毛细管电泳是８０年代发展起来的一种高效、快速、微量的分离分析技术。在生物、医药领域中有着广泛的应用。本文叙述了高效毛细管电泳法的影响分离的主要因素、样品预处理及其在滥用药物分析中的应用。     

毛细管电泳在药物分析中的应用

１　前言毛细管电泳（ＣＥ）的历史可以归溯到１９６７年Ｈｅｊｅｒｔｅｎ发表的博士论文,现在人们普遍将ＣＥ定义为在内径１００μｍ以内的毛细管中进行的电泳分析,它的出发点应归功于１９７９年Ｍｉｋｋｅｒｓ等人在内径０２ｍｍ的聚四氟乙烯管中进行的研究。１９８１年Ｊｏｒｇｅｎｓｏｎ和Ｌｕｋａｃｓ发表的研究论文对ＣＥ的发展作出了决定性的贡献,他们用内径７５μｍ的毛细管对荧光标识氨基酸化合物进行ＣＥ测定,获得理论塔板数高达４０万的高分离性能,并且深入地阐明了ＣＥ的一些基本性能和分离的理论依据。１９８４年Ｔｅｒ…     

毛细管分析技术的应用与展望

目的概述毛细管分析技术的应用范围。方法查阅近几年中国医药学期刊的报道,整理分析。结果在中药分析、手性药物分析、药物杂质检查、中药有效成分分离及指纹图谱研究等方面应用广泛。结论毛细管电泳技术具有高灵敏度、高分辨率、高速度以及样品少、成本低等优点,被广泛应用于药物分析领域中。     

高效毛细管电泳/前沿分析及其在手性药性药物-蛋白结合研究中的应用

目的：综述了高效毛细管电泳／前沿分析（HPCE／FA）方法的原理、特点、及其在手性药物－蛋白结合研究中的应用。方法：采用HPCE／FA方法。结果：不同的手性药物对映体与蛋白结合可能存在判别,同一药物对映体之间与不同蛋白结合率可能存在差别,HPCE／FA仅需极少量样品即可同时测定手性药物各对映体在蛋白结合中的游离浓度。结论：HPCE／FA是一种高效、分析迅速、样本用量极少的研究蛋白结合方法,特别是对于手性药物与昂贵不易获得的蛋白结合研究。     

非水毛细管电泳法分离分析非甾体抗炎药物

目的建立一种非水毛细管电泳法(NACE)分离非甾体抗炎药物,并对奥沙普秦肠溶片进行定量分析。方法以含醋酸铵15mmol/L的甲醇-乙腈(3∶7)混合液为电泳缓冲液,运行电压20kV,柱温20℃,进样压力2.5kPa,进样时间10 s,UV检测波长200nm;内标法(内标:布洛芬)定量奥沙普秦肠溶片。结果NACE能有效分离布洛芬、萘普生、奥沙普秦、舒林酸和双氯芬酸钠五种非甾体抗炎药物。奥沙普秦与布洛芬的峰面积比对奥沙普秦浓度C(μg/mL)的线性回归方程为Y=0.0434C-7.1×10-3(R=0.999 9,n=9),线性范围0.8~80μg/mL,加样回收率99.05%~101.48%,日内、日间精密度分别为0.54%~0.83%,0.55%~0.92%。结论NACE用于奥沙普秦等非甾体抗炎药物的分离分析,选择性高,重现性好,准确,快速,可作为该类药物及其制剂的质量控制手段。     

脑蛋白水解物中多肽组分的高效毛细管电泳分析

目的 利用高效毛细管电泳法比较2种水解方法提纯的脑蛋白水解物中的多肽组分,同时监测进口脑蛋白水解物注射液的多肽组分分布.方法 采用固相萃取法提取脑组织中的多肽成分,以PACE/A5500型高效毛细管电泳仪对进口脑蛋白水解物注射液和本实验室提取的脑组织匀浆物进行比较.结果 进口脑蛋白水解物注射液中多肽成分大部分集中在＞14400区域,本实验室提纯的脑蛋白水解物成分中多肽多集中在相对分子质量6000 ～ 14 400区域,且纯度及含量均较高.结论 高效毛细管电泳法可有效地对脑蛋白水解物注射液中多肽组分进行分析和比较,2种提纯方法对脑蛋白的裂解能力相差不大.     

Determination of Ziprasidone in pharmaceutical formulations by capillary zone electrophoresis

The atypical antipsychotic drug Ziprasidone was determined by capillary zone electrophoresis in pharmaceutical formulations. Extraction of the drug from the formulation consisted in a simple dissolution step with methanol as solvent, and enables determination of the drug without any interference from the excipients. It was found that at pH of the background electrolyte above 5 the peak of the drug exhibited a tailing, at pH 6 or higher even a disappearance of the peak in the electropherogram was observed. This behaviour was related to the concomitant reduction of the solubility of the drug in the background electrolyte upon deprotonation at higher pH. As a consequence, analyses were carried out with formate buffer, pH 3.0, and enabled run times of about 3 min. The method was validated in terms of stability, specificity, precision, accuracy, linearity, quantitation limits, and robustness, and was applied to the analysis of different commercial capsules.     

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.     

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。     

Validation of a capillary electrophoresis method for the analysis of ibandronate related impurities

A capillary zone electrophoretic (CZE) method has been developed for the determination of impurities (phosphyte and phosphate) in technical-grade ibandronate, which is a potent nitrogen-containing bisphosphonate. Successful separation of the drug from the impurities was achieved using 1mM tetradecyl-trimethyl-ammonium bromide (TTAB) and 5mM potassium chromate (pH 10.0) as background electrolyte with an indirect detection at 254 nm. The optimised method was validated for specificity, precision, linearity and accuracy. The limit of detection (LOD) was 2 microg/mL and the limit of quantification (LOQ) was 7 microg/mL for both phosphyte and phosphate. The developed CZE method used to determine phosphyte and phosphate as bisphosphonates impurities can be used to evaluate the quality of regular production samples of ibandronate.     

ROC曲线评价毛细管区带电泳用于α地中海贫血筛查的临床价值

目的探讨血红蛋白毛细管区带电泳用于α地中海贫血筛查的临床价值,确定血红蛋白A2（HemoglobinA2,HbA2）用于α地中海贫血诊断的截断值。方法收集66例d地中海贫血病例α地中海贫血组）和86例健康对照（正常对照组）。采集各组研究对象的静脉血进行血红蛋白毛细管区带电泳和α地中海贫血基因检测,通过建立受试者工作特征曲线（ROC曲线）对HbA2在α地中海贫血诊断中的统计学指标进行综合评价,并确定HbA2用于α地中海贫血诊断的截断值;统计工具采用SPSS17．0统计软件。结果d地中海贫血组和正常对照组的毛细管区带电泳的HbA2检测结果分别为（2．33±0．22）％和（2．65±0．29）％,α地中海贫血组明显低于正常对照组,差异有统计学意义（P〈0．01）。HbA2用于诊断α地中海贫血的ROC曲线下面积（AUC）为0．804（SE：0．035,95％CI：0．736～0．872）,诊断价值具有统计学意义俨〈0．011;HbA2用于仪地中海贫血诊断的截断值为2．55％,对应的诊断灵敏度和特异度分别为60．5％和89．4％。结论血红蛋白毛细管区带电泳检测HbA2用于α地中海贫血筛查是目前较好的方法,具有较高的临床价值。     

Method development and validation for the simultaneous determination of cinnarizine and co-formulated drugs in pharmaceutical preparations by capillary electrophoresis

Rapid and simple capillary electrophoresis (CE) methods were developed for the simultaneous determinations of cinnarizine and domperidone (CN/DOM) and cinnarizine and nicergoline (CN/NIC) in their co-formulated tablets. The optimized CE conditions were as follows: running buffer, methanol-acetate buffer (pH 3.0, 10 mM) (80:20 and 85:15 (v/v) for CN/DOM and CN/NIC, respectively); applied voltage, 20 kV; UV detection wavelengths, 215 and 227 nm for CN/DOM and CN/NIC, respectively; hydrodynamic injection was performed at a height of 25 mm for 30 s. Quinine hydrochloride and nicardipine hydrochloride were used as internal standards for the determination of CN/DOM and CN/NIC, respectively. Calibration curves were linear over the ranges 0.25-20/0.375-15 microg/ml (CN/DOM) and 0.25-25/0.4-10 microg/ml (CN/NIC) in each optimized condition. Detection limits were 0.074/0.119 microg/ml and 0.072/0.116 microg/ml for CN/DOM and CN/NIC, respectively. The proposed methods were successfully applied for the simultaneous determination of both CN/DOM and CN/NIC in their co-formulated tablets without interfering peaks due to the excipients present in the pharmaceutical tablets. The estimated amounts of CN/DOM and CN/NIC were almost identical with the certified values, and their percentage relative standard deviation values (%R.S.D.) were found to be < or =2.34% (n=3).