用于荧光γ-氨基丁酸传感的nadf功能化有机半导体聚合物点的合成

IF 2.8 4区 工程技术 Q2 POLYMER SCIENCE
Dong Hoon Lee, Jong Woo Kim, Tae Hyeon Kim, Kune-Woo Lee, Taek Seung Lee
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引用次数: 0

摘要

γ-氨基丁酸(GABA)是一种与神经系统疾病相关的重要神经递质。在这项工作中,开发了一种基于半导体聚合物点的生物传感器,通过比例荧光变化检测GABA。通过N-(3-二甲氨基丙基)-N′-乙基碳二亚胺盐酸盐/N-羟基琥珀酰亚胺偶联反应,将半导体聚合物点(Pdots)表面与硼酸进行功能化,并与烟酰胺腺嘌呤二核苷酸(NAD)中的二醇结合形成硼酯。GABA通过GABase酶促反应转化为琥珀酸盐。在反应过程中,非荧光的NAD变成蓝色发射,将NAD转化为其还原形式NADH,并且也位于聚合物点表面。同时,通过Pdots与NADH之间的电子转移,Pdots的红色荧光减弱。利用酶促反应过程中荧光颜色的变化,可以利用形成的NADH来测定GABA的浓度。GABA的检测限为22.0 μM,检测范围为0 ~ 0.20 mM。在GABase和荧光Pdots存在下,利用酶促反应成功地定量了gaba。在反应过程中,Pdots表面的NAD被转化为荧光NADH,由于能量被转移到蓝色发射的NADH, Pdots的红色荧光减弱。红蓝荧光的比值可以作为GABA浓度的有效信号。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synthesis of NAD-functionalized organic semiconducting polymer dots for fluorometric γ-aminobutyric acid sensing

γ-Aminobutyric acid (GABA) is an important neurotransmitter that is associated with neurological disorders. In this work, a semiconducting polymer dot-based biosensor was developed to detect GABA via ratiometric fluorescence change. The surface of the semiconducting polymer dots (Pdots) was functionalized with boronic acid via N-(3-dimethylaminopropyl)-N’-ethylcarbodiimide hydrochloride/N-hydroxysuccinimide coupling reaction that could further bind to diol in nicotinamide adenine dinucleotide (NAD) to form boronic ester. GABA was converted to succinate by the enzymatic reaction using GABase. During the reaction, nonfluorescent NAD became blue-emissive, converting NAD to its reduced form NADH and was also located on the polymer dot surface. Simultaneously, the red fluorescence of Pdots decreased via electron transfer between Pdots and NADH. With this fluorescence color change during the enzymatic reaction, the concentration of GABA could be determined using the NADH formed. The limit of detection of GABA was found to be 22.0 μM, and the detection range was 0–0.20 mM of GABA concentration.

Graphical Abstract

GABA was successfully quantified using enzymatic reaction in the presence of GABase and fluorescent Pdots. During the reaction, the NAD on the surface of Pdots was converted to fluorescent NADH, and red fluorescence of Pdots became decreased because the energy was transferred to blue-emissive NADH. The ratio of red and blue fluorescence can be an efficient signal of GABA concentration.

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来源期刊
Macromolecular Research
Macromolecular Research 工程技术-高分子科学
CiteScore
4.70
自引率
8.30%
发文量
100
审稿时长
1.3 months
期刊介绍: Original research on all aspects of polymer science, engineering and technology, including nanotechnology Presents original research articles on all aspects of polymer science, engineering and technology Coverage extends to such topics as nanotechnology, biotechnology and information technology The English-language journal of the Polymer Society of Korea Macromolecular Research is a scientific journal published monthly by the Polymer Society of Korea. Macromolecular Research publishes original researches on all aspects of polymer science, engineering, and technology as well as new emerging technologies using polymeric materials including nanotechnology, biotechnology, and information technology in forms of Articles, Communications, Notes, Reviews, and Feature articles.
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