One-step sensitive thrombin detection based on a nanofibrous sensing platform

Journal of Materials Chemistry. B, Materials for Biology and Medicine
Xiaoling LiCuisong Zhou

Abstract

Convenient and time-saving one-step strategies for detecting ultralow concentrations of protein biomarkers play key roles in rapid disease diagnosis. In this study, we report a one-step detection method based on a nanofibrous sensing platform via the combination of proximity-induced DNA strand displacement (PiDSD), catalytic hairpin assembly (CHA) amplification and thioflavin T (ThT) binding. The interface behaviors on the nanofibrous membrane were studied to promote interface reaction kinetics and thermodynamics. Thrombin was used as a model biomarker, and the nanofibrous sensing platform achieved a limit of detection as low as 1.0 pM, a wide linear range of 50 pM to 5 nM, excellent specificity and good long-term stability. Compared with previous one-step thrombin detection methods, our one-step detection method is label-free, convenient and much more sensitive; it has potential applications for protein detection in point-to-care testing (POCT) and early diagnosis.

References

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Citations

Jan 4, 2020·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Xiaofei WangChengxiao Zhang
Jul 21, 2020·Methods and Applications in Fluorescence·Tulsi R DamasePeter B Allen
Jul 3, 2021·International Journal of Molecular Sciences·Kinga Halicka, Joanna Cabaj

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Methods Mentioned

BETA
enzyme-linked immunosorbent assays
biosensor
fluorescence cross-correlation spectroscopy
ELISA
electrophoresis
Fluorescence

Software Mentioned

PiDSD

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