Zinc oxide-coated plasmonic chip modified with a bispecific antibody for sensitive detection of a fluorescent labeled-antigen.

Zinc oxide-coated plasmonic chip modified with a bispecific antibody for sensitive detection of a fluorescent labeled-antigen.
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用双特异性抗体修饰的氧化锌涂层等离子体芯片,用于灵敏检测荧光标记抗原。

DOI:
10.1021/ac200898e
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发表时间:
2011
影响因子:
7.4
通讯作者:
I. Kumagai
I. Kumagai
中科院分区:
化学1区
文献类型:
--
作者:
K. Tawa;M. Umetsu;T. Hattori;I. Kumagai

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研制了一种用于检测Cy5标记的绿色荧光蛋白(GFP)的表面等离子体激元增强荧光(SPF)生物传感器芯片。本实验室制备的双功能抗体(抗GFP×抗-ZnO抗体)被密集固定在传感器芯片上用于GFP检测。由于抗体的密集堆积和抑制非特异性蛋白质吸附和荧光猝灭的氧化锌涂层,等离子体生物传感器的灵敏度得到了提高。利用包覆了氧化锌的等离子体芯片,可以通过SPF检测到晚上10点的Cy5标记的绿色荧光蛋白。这种灵敏度比在镀有氧化锌的玻片上的常规荧光检测高100倍。
A plasmonic biosensor chip of silver-coated PMMA grating with a zinc oxide (ZnO) overlayer is fabricated for surface plasmon field-enhanced fluorescence (SPF) detection of Cy5-labeled green fluorescent protein (GFP). A bispecific antibody (anti-GFP x anti-ZnO antibody) prepared in our lab is densely immobilized on the sensor chip for GFP detection. The sensitivity of the plasmonic biosensors is improved due to densely packed antibodies and ZnO-coating that suppresses nonspecific protein adsorption and fluorescent quenching. With the ZnO-coated plasmonic chip, Cy5-labeled GFP of 10 pM can be detected through SPF. This sensitivity is 100 higher compared with the normal fluorescent detection on a ZnO-coated glass slide.
DOI: 10.1093/nar/gkh572
发表时间: 2004-04-01
影响因子: 14.9
作者:
Tawa, K;Knoll, W
通讯作者: Knoll, W
人类抗金抗体:生物功能化金纳米颗粒和具有抗金抗体的表面。
DOI: --
发表时间: 2008
期刊: J. Biol. Chem., 283
影响因子: --
作者:
Watanabe H.;Nakanishi T.;Umetsu M.;Kumagai I.
通讯作者: Kumagai I.