title: Dual signal amplification strategy for the fabrication of an ultrasensitive electrochemiluminescenct aptasensor.
abstract: A dual signal amplification strategy was designed to construct a cathodic peroxydisulfate-based electrochemiluminescence (ECL) aptasensor for the ultrasensitive detection of thrombin (TB) as a model analyte. The signal was amplified by the employment of two kinds of co-reactant, (1) in situ generated dissolved O2 from the cascade catalysis of GOD and HRP as co-reactants and (2) intercalation of a new co-reactant into the grooves of the dsDNA polymers based on the hybridization chain reaction (HCR). Femtomolar levels of TB could be detected using the developed aptasensor, with high sensitivity and good stability. Thus the S2O8(2-)-O2 ECL system has great potential for development and application in clinical diagnostics, immunology and biomedical research.
authors.affiliation: Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China. yingzhuo@swu.edu.cn yuanruo@swu.edu.cn.
authors.forename: Min
authors.initials: M
authors.lastname: Zhao
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhuo
authors.forename: Yaqin
authors.initials: Y
authors.lastname: Chai
authors.forename: Yun
authors.initials: Y
authors.lastname: Xiang
authors.forename: Ni
authors.initials: N
authors.lastname: Liao
authors.forename: Guofeng
authors.initials: G
authors.lastname: Gui
authors.forename: Ruo
authors.initials: R
authors.lastname: Yuan