Aptamer-based electrochemical biosensor for interferon gamma detection.
Aptamer-based electrochemical biosensor for interferon gamma detection.
复制标题
DOI:
10.1021/ac101409t
复制
发表时间:
2010-10-01
影响因子:
7.4
通讯作者:
Revzin, Alexander
中科院分区:
文献类型:
--
作者:
Liu, Ying;Tuleouva, Nazgul;Ramanculov, Erlan;Revzin, Alexander
In this paper, we describe the development of an electrochemical DNA aptamer-based biosensor for detection of IFN-γ. A DNA hairpin containing IFN-γ-binding aptamer was thiolated, conjugated with Methylene Blue (MB) redox tag and immobilized on a gold electrode by self-assembly. Binding of IFN-γ caused the aptamer hairpin to unfold, pushing MB redox molecules away from the electrode and decreasing electron-transfer efficiency. The change in redox current was quantified using Square Wave Voltammetry (SWV) and was found to be highly sensitive to IFN-γ concentration. The limit of detection for optimized biosensor was 0.06 nM with linear response extending to 10 nM. This aptasensor was specific to IFN-γ in the presence of overabundant serum proteins. Importantly, the same aptasensor could be regenerated by disrupting aptamer-IFN-γ complex in urea buffer and re-used multiple times. Unlike standard sandwich immunoassays, the aptasensor described here allowed to detect IFN-γ binding directly without the need for multiple washing steps and reagents. An electrochemical biosensor for simple and sensitive detection of IFN-γ demonstrated in this paper will have future applications in immunology, cancer research and infectious disease monitoring.
登录
查看更多内容
影响因子:
7.4
作者:
Hermann, Marc;Veres, Teodor;Tabrizian, Maryam
通讯作者:
Tabrizian, Maryam
影响因子:
62.1
作者:
Liu, Juewen;Cao, Zehui;Lu, Yi
通讯作者:
Lu, Yi
影响因子:
4.4
作者:
FitzGerald, S. Pete;McConnell, R. Ivan;Huxley, Allen
通讯作者:
Huxley, Allen
影响因子:
15
作者:
Radi, AE;Sánchez, JLA;O'Sullivan, CK
通讯作者:
O'Sullivan, CK
影响因子:
7.4
作者:
Lu, Ying;Li, Xianchan;Mao, Lanqun
通讯作者:
Mao, Lanqun