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The Development of Novel Immunoassay System using fluorescent Rareearth Metal Complex Labels and Transparent Polymer Films.

使用荧光稀土金属络合物标签和透明聚合物薄膜开发新型免疫测定系统。

基本信息

批准号：
02555156
负责人：
YOTSUYANAGI Takao
金额：
$ 5.25万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

项目摘要

This work has been conducted for the exploitation of time-resolved fluoimetric immunoassay systems by the combined use of long-lived rare-earth complex labels and transparent polymer films. The central aims of this work are ; (1) to establish the molecular designing criteria for the chelating ligands which give the long-lived 'energy transfer fluorescence' and (2) to examine plasticized polyvinyl chloride films as the media for the separation and the fluorescence enhancement. Main results are outlined as :(1) Time-resolved fluorescence measurement apparatus was accomplished wiht a pulsed nitrogen laser radiation source (337.1 nm). The accuracy and time-resolution capability of the builtup system was confirmed using the model luminescence system of benzoyltrifluoroacetonato Eu complex in ethanol.(2) The octadentate polyminocaboxylate ligands which have been Commercially available for calcium ion detection in biological systems have been proposed as promising candidates for the energy transfer fluorescence labels for the lanthanide ions. They have the 'antenna groups' of quinolyl or phenyl rings for absorption of near uv light and posses the N, O-donor set sa suffices for the coordination number of the lanthanide ions.(3) The strongly fluorescent chelate ion-pair Q[Eu(tta)_4] has been found to extracted in chloroform from alkaline solution at pH 10 (tta : thenoyltrifluoroacetonate, Q^+ : quaternary ammonium ion), whose fluorescence intensity was by a factor of 100 greater than that of the parent complex, [Eu(tta)_3].(4) A PVC film plasticized with dioctylphhalate was unfortunately not so beneficial to the fluorescence enhancement of Q[Eu(tta)_4], by contrast, it enhances the intensity of a triphenylmethane dye, ethyl violet. This observation indicates that the matching between fluorescent folutes and the film medium is a crucial factor to be conceived on the designing of such chemical systems for the luminescence in somewhat ambiguous nature.

这项工作是为了开发结合使用长寿命稀土络合物标记和透明聚合物膜的时间分辨荧光免疫分析系统。这项工作的中心目标是：(1)建立给予长寿命“能量转移荧光”的螯合配体的分子设计标准；(2)考察增塑聚氯乙烯薄膜作为分离和荧光增强介质的可能性。主要结果如下：(1)利用脉冲氮气激光辐射源(337.1 nm)完成了时间分辨荧光测量装置的研制。以苯甲酰基三氟丙酮Eu配合物在乙醇中的模型发光体系为例，验证了该体系的准确性和时间分辨能力。(2)已用于生物体系中钙离子检测的八齿多氨基羧酸盐配体有望成为稀土离子能量转移荧光标记物。它们具有用于吸收近紫外光的喹啉或苯环的‘天线基’，并具有足以满足稀土离子配位数的N，O-给体。(3)在pH为10的碱性溶液中，从氯仿中提取了强荧光的螯合离子对Q[Eu(Tta)_4](tta：噻吩甲酰三氟丙酮，Q^+：季铵离子)，其荧光强度比母体络合物大100倍，(4)用邻苯二甲酸二辛酯增塑的聚氯乙烯薄膜对Q[Eu(Tta)_4]的荧光增强效果不是很好，相反，它增强了三苯甲烷染料乙基紫的荧光强度。这一观察表明，荧光溶剂与薄膜介质之间的匹配是设计这类化学体系的一个关键因素，因为这种发光性质有些含糊。