化学发光免疫分析技术在微生物检测中的应用

化学发光免疫分析技术凭借其化学发光的高灵敏性和免疫反应的高特异性在微生物快速检测中广泛应用。该文着重叙述了化学发光免疫分析技术核心检测体系在微生物检测中的研究进展,并对其涉及到的样品前处理和检测新方法进行了综述。化学发光免疫分析技术检测微生物用时短、成本低,但特异性识别方法和检测的灵敏度有待提升,新型的发光体系、发光放大方法、可替代抗体的识别分子以及相关的前处理技术是未来研究的重点。     

化学发光免疫分析技术及其在农药残留检测中的应用进展

化学发光免疫分析技术发展迅速,具有特异性强、灵敏度高、线性范围宽、操作简单、成本底、检测时间短、易于实现自动化等优点,在农残检测领域得到广泛应用。以化学发光免疫分析为基础,介绍了吖啶酯类、鲁米诺类、咪唑类、苯酚类及芳基草酸酯类5种化学发光剂,及化学发光免疫分析法、荧光化学发光免疫分析法、化学发光酶联免疫分析法和电化学发光免疫分析法4种常见的分析方法,重点综述了化学发光免疫分析技术在农药残留检测中的应用,并对该领域的研究前景进行了展望,旨在为农药残留检测相关研究提供参考。     

化学发光酶免疫分析研究进展

叙述了化学发光免疫分析的分类及特点,从发光底物、增强剂、过氧化物酶、过氧化物及其他方面,对鲁米诺类化合物化学发光酶免疫分析的进展进行了综述,引用文献34篇。     

电化学发光法测定发光标记试剂ABEI

ABEI-[N-(4-氨基丁基)-N-乙基]-氯基-2,3-二氢吩噻嗪-1,4-二酮是化学发光免疫分析法(简称LIA)中最常用的发光标记试剂,但有关电化学发光免疫分析目前尚未见报道。本文利用自制的电化学发光仪,对ABEI和ABEI标记兔抗HCG的电化学发光行为进行了研究。提出了利用电化学发光进行免疫分析的新途径。     

基于量子点的电致化学发光免疫传感器研究进展

电致化学发光集成了发光和电化学分析的优点,在生物传感分析方面具有广泛的应用前景.量子点因其独特的性质成为电致化学发光的三大发光体系之一.本文综述了近年来基于量子点的电致化学发光免疫传感器的种类及其信号放大技术,并就相关研究发展方向和趋势作了初步展望.     

化学发光分析法(V) 气相化学发光和电生化学发光

本文是化学发光分析法最后一讲,介绍了气相化学发光分析和电生化学发光分析。详细讲述了气相化学发光分析中检测化合物及检测元素的检测器,概述了气相化学发光的分析应用:对电生化学发光的发光过程、测量仪器及其分析应用也进行了详细介绍。     

草酸二芳基酯-过氧化氢化学发光体系的原理与应用

草酸二芳基酯-过氧化氢化学发光体系是一种原理简单、效果明显、趣味性强的化学发光体系。通过体系中的染料将反应的化学能转变为光能,广泛应用于发光玩具、紧急照明、搜寻救援等领域。根据所使用染料的不同,化学发光可以发出不同颜色的可见光以及肉眼不可见的红外光。本科普实验通过多种化学发光染料,介绍了化学发光的原理和红、绿、蓝、红外发光的波长范围,以及展示了利用红光、绿光、蓝光实现多种颜色发光的原理。本文设计了不同染料的混合发光、火山喷发模拟、自制化学发光荧光笔、粉笔彩色发光、自制荧光棒等多组化学发光科普实验和互动环节,寓教于乐,生动有趣。     

微孔板化学发光法检测碱性磷酸酶技术的建立

碱性磷酸酶(ALP)能催化发光底物APLS迅速水解并持续发光,据此建立了化学发光技术检测ALP活性的方法。利用一种新的发光底物APLS,建立微孔板化学发光法检测ALP活性,并对实验条件进行优化。优化后的最适反应条件为:微孔板上每孔加200μL APLS,在pH=9.5、37℃条件下与ALP反应10min,多功能酶标仪检测发光光子数(RLU),检测ALP线性范围是0.01~1U/L。微孔板化学发光法检测ALP,敏感度更高,且操作简便易行。     

第一届发光分析会议在西安召开

中国化学会第一届发光分析学术讨论会于1986年8月22日至26日在西安举行。来自高校、科研单位和仪器厂家的99名代表出席会议。会上交流论文52篇,其中大会报告有:“近年来荧光分析在某些方面的进展”(陈国珍教授);“分析化学中的荧光反应”(慈云祥教授);“磷光分析法的发展及应用”(许金钧付教授):“荧光和化学发光光导纤维化学传感器”(章竹君教授);“液相化学发光分析及其应用”(吕九如讲师);“发光免疫分析法在医学上的应用及进展”(蒋滋慧副研究员)。会议期间展出了江苏电分析仪器厂生产的8510型多功能光导纤维光度计、微机控制的流动注射化学发光分析仪、化学发光免疫分析仪,西安无线电八厂生产的YHF-1型液相化学发光分析仪,厦门大学试产的YF-2型荧光分光光度计和HF-1型智能化学发光分析仪。这些仪器的研制为在我国     

化学发光免疫分析新进展

本文综述了2007年至今国内外化学发光免疫分析(Chemiluminescence immunoassay,CLIA)的理论研究成果及应用进展,分别从化学发光反应体系、基因工程试剂、新型固相材料、化学发光免疫分析联用检测技术以及多组分化学发光免疫检测技术等方面进行了阐述,并对化学发光免疫分析技术的发展趋势进行了展望.引用文献113篇.     

Clinical applications of chemiluminescence

This article reviews the clinical applications of chemiluminescence in routine testing and surveys the diverse applications of chemiluminescence in clinical research. In routine clinical testing, chemiluminescent labels (acridinium ester, acridinium sulfonamide) and detection reactions for peroxidase and alkaline phosphatase enzyme labels (luminol and adamantyl 1,2-dioxetane-based reactions, respectively) are widely used in immunoassay and nucleic acid probe assays (e.g. hybridization protection assay, Hybrid Capture^® assay). In clinical research the sensitivity, dynamic range and diversity of chemiluminescent assays has led to a vast range of applications, notably in protein and nucleic acid blotting, microarray-based assays, monitoring reactive oxygen species, and as detection reactions for substances separated by HPLC, capillary electrophoresis (CE), and flow-injection analysis.     

A study of the chemiluminescence of some acidic triphenylmethane dyes

Chemiluminescence was observed when some acidic triphenylmethane dyes were oxidized with hydrogen peroxide in alkaline solution. Trace amounts of Co(II) catalysed this chemiluminescent reaction strongly, especially in the presence of the cationic surfactant cetyltrimethylammonium bromide. The chemiluminescence spectra of some compounds and the absorption spectra of some products of the chemiluminescent reactions were investigated, and some acidic triphenylmethane dyes were studied by the Hückel molecular orbital method. On the basis of these investigations, a possible mechanism for this chemiluminescent reaction, and an initial explanation for the relationship between the structure of the reagents and their chemiluminescent behaviour were proposed. The optimum conditions for use of some of the chemiluminescent reaction systems were selected by means of the modified simplex method, and a chemiluminescent analytical method for determination of ultratrace amounts of cobalt was established, with a detection limit of 5 pg/ml. It was used for analysis of natural water samples, and good results were obtained.     

Chemiluminescence from alkoxy-substituted acridinium dimethylphenyl ester labels

Chemiluminescent acridinium dimethylphenyl ester labels are used in automated immunoassays for clinical diagnostics. Light emission from these labels is triggered by alkaline peroxide in the presence of the cationic surfactant cetyltrimethylammonium chloride (CTAC). The surfactant plays a critical role in the chemiluminescence process of these labels by both accelerating their emission kinetics and increasing total light output enabling high throughout and improved assay sensitivity in automated immunoassays. Despite the surfactant's crucial role in the chemiluminescent reaction, no study has investigated how structural perturbations in the acridinium ring could impact the influence of the surfactant. We describe herein the synthesis and properties of three new alkoxy-substituted, acridinium dimethylphenyl esters where the nature of the alkoxy group in the acridinium ring was varied (hydrophobic or hydrophilic). Chemiluminescence measurements of these alkoxy-substituted labels indicate that hydrophilic functional groups in the acridinium ring, in particular sulfobetaine zwitterions, disrupt surfactant-mediated compression of emission times but not enhancement of light yield. These results support the hypothesis that surfactant-mediated effects require the binding of two different reaction intermediates to surfactant aggregates and, that surfactants influence light emission from acridinium esters by two separate mechanisms. Our studies also indicate that preservation of both surfactant effects on acridinium ester chemiluminescence and low non-specific binding of the label can be achieved with a relatively hydrophobic acridinium ring coupled to a hydrophilic phenolic ester leaving group.     

Bio- and chemiluminescence in bioanalysis

Analytical chemiluminescence and bioluminescence represent a versatile, ultrasensitive tool with a wide range of applications in diverse fields such as biotechnology, pharmacology, molecular biology, clinical and environmental chemistry. Enzyme activities and enzyme substrates and inhibitors can be efficiently determined when directly involved in luminescent reactions, and also when they take part in a reaction suitable for coupling to a final light-emitting reaction. Chemiluminescence detection has been exploited in the fields of flow-injection analysis and column-liquid chromatographic and capillary-electrophoretic separative systems, due to its high sensitivity when compared with colorimetric detection. It has widely been used as an indicator of reactive oxygen species formation in cells and whole organs, thus allowing the study of a number of pathophysiological conditions related to oxidative stress. Chemiluminescence represents a sensitive and rapid alternative to radioactivity as a detection principle in immunoassays for the determination of a wide range of molecules (hormones, food additives, environmental pollutants) and in filter membrane biospecific reactions (Southern, Northern, Western, dot blot) for the determination of nucleic acids and proteins. Chemiluminescence has also been used for the sensitive and specific localization and quantitation of target analytes in tissue sections and single cells by immunohistochemistry and in situ hybridization techniques. A relatively recent application regards the use of luminescent reporter genes for the development of bioassays based on genetically engineered microorganisms or mammalian cells able to emit visible light in response to specific inorganic and organic compounds. Finally, the high detectability and rapidity of bio- and chemiluminescent detection make it suitable for the development of microarray-based high throughput screening assays, in which simultaneous, multianalyte detection is performed on multiple samples.     

AuCl4-H2O2化学发光体系研究

本文发现, AuCl4^-在KOH和H2O2存在下会产生弱化学发光信号; 在此基础上建立了AuCl4^-H2O2-KOH-CTMAB体系测定金的新的简单的化学发光分析法; 方法的检测限为5.5ppbAn; 线性范围为10-800pph; 测定100ppb金溶液的相对标准偏差为6.5%; 并初步探讨了AuCl4^-化学发光的可能过程及表面活性剂的影响作用。     

Chemiluminescence in the oxidation of phenyl-substituted silole radical anions and dianions

The emittor in the chemiluminescent electron transfer oxidation of the radical anions and dianions of 1,1-dimethyl-2,5-diphenyl- and 1,1-dimethyl-2,3,4,5-tetraphenylsilole is shown to be the parent compound. Chemiluminescence is reported in the oxidation of the radical anions of 1,2,5-triphenylphosphole, 2,3,4,5-tetraphenylthiophene-5-dioxide and 1,1-diphenyldibenzosilole.     

人血清中cTnI的化学发光酶免疫分析研究——实验条件的优化

采用高效化学发光试剂3-(2'-螺旋金刚烷)-4-甲氧基-4-(3"-羟基)苯-1,2-二氧杂环丁烷磷酸(AMPPD)作为检测底物, 并将传统的ELISA两步双抗夹心法改为一步法, 得到了高灵敏测定人血清中心肌肌钙蛋白I(cTnI)的化学发光酶免疫分析优化条件. 采用单因素变化法和方阵滴定法得到的最佳实验条件为: 捕获抗体包被浓度为10.0 μg/mL, 以pH=7.0的PBS作为免疫反应缓冲底液, 以含质量分数为1.0%的BSA pH=9.6的碳酸盐溶液缓冲液, 于4 ℃封闭过夜, 生物素-检测抗体(Biotin-IgG2)以及碱性磷酸酶-亲和素(ALP-Avidin)结合物均采用1:2000稀释度, 免疫反应条件为37 ℃, 孵育时间60 min, 以去离子水作为洗涤剂, 以1:100稀释的AMPPD作为发光反应底物, 发光反应时间10 min(37 ℃). 检出限为0.02 ng/mL, 比现行ELISA法灵敏度提高一个数量级; 测定周期约75 min, 比两步法ELISA快得多; 线性范围(0.04~36.20 ng/mL)比ELISA法扩宽了两个数量级; 加标回收率97.5%~102.8%, 对标准样品的测定结果与用ELISA法的测定结果吻合; 重复性好, 3个样品批内变异系数均小于8.5%(n=12).     

板式磁颗粒化学发光免疫分析测定人血清中糖类抗原125

在传统的板式化学发光免疫分析法和管式磁颗粒化学发光免疫分析法基础上,建立了人血清中糖类抗原125(CA125)的板式磁颗粒化学发光免疫分析方法.该方法以磁性微粒子作为分离固相,96孔板为反应容器,辣根过氧化物酶(HRP)催化H2O2-luminol化学发光体系作为检测体系.本法测定CA125的检测灵敏度可达2.0U/mL,线性范围为0～400U/mL.与常用的包被板化学发光免疫分析方法对比,该方法检测范围宽.与管式磁颗粒化化学发光法比较,其分析灵敏度与精密度高、线性范围、分析通量以及分析成本方面均显示了很好的优越性.采用该方法对人血清中CA125进行测定并与罗氏全自动电化学发光系统的测值结果进行了比对,两者显示了良好的相关性.     

Effect of surfactants on the chemiluminescence of acridinium dimethylphenyl ester labels and their conjugates

Chemiluminescent acridinium dimethylphenyl esters, containing two methyl groups flanking the phenolic ester bond, display excellent chemiluminescence stability and are used as labels in automated immunoassays for clinical diagnostics. Light emission from these labels is triggered with alkaline peroxide in the presence of the cationic surfactant cetyltrimethylammonium chloride. Under these conditions, light emission is rapid and is complete in <5 s. In the present study we examined the effect of various surfactants on light emission from acridinium dimethylphenyl ester labels and their conjugates containing hydrophilic linkers derived either from hexa(ethylene)glycol or a sulfobetaine zwitterion. Sulfobetaine zwitterions are very polar and incorporation of these functional groups in acridinium dimethyphenyl esters and their conjugates represents a new approach to improving the aqueous solubility of these chemiluminescent labels. Our results indicate that in general, surfactants affect light emission from these labels and their conjugates by two discrete mechanisms. Cationic surfactants, but not anionic or non-ionic surfactants, accelerate overall light emission kinetics and a more modest effect is observed with zwitterionic surfactants. Surfactants also enhance total light output and the magnitude of this enhancement is maximal for cationic surfactants and a sulfobetaine zwitterionic surfactant. These observations are the first to clearly delineate the role of the surfactant on the chemiluminescence reaction pathway of acridinium esters and can be rationalized based on known effects of surfactant aggregates on bimolecular and unimolecular reactions.