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

Xiaoling Li1, Yuyang Wu1, Jingjing Niu1

  • 1College of Chemistry, Sichuan University, Chengdu 610064, P. R. China. zcs@scu.edu.cn.

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|August 7, 2019
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Summary
This summary is machine-generated.

This study presents a novel one-step method for detecting protein biomarkers using a nanofibrous sensing platform. The technique offers a sensitive, label-free approach for rapid disease diagnosis and point-of-care testing.

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Area of Science:

  • Biomarker Detection
  • Nanomaterials Science
  • Biosensing Technology

Background:

  • Rapid disease diagnosis relies on efficient detection of ultralow concentrations of protein biomarkers.
  • Existing methods often lack convenience and speed, hindering point-of-care applications.
  • Developing one-step, sensitive detection strategies is crucial for early disease identification.

Purpose of the Study:

  • To develop a convenient and time-saving one-step detection method for protein biomarkers.
  • To utilize a nanofibrous sensing platform combined with proximity-induced DNA strand displacement (PiDSD), catalytic hairpin assembly (CHA), and thioflavin T (ThT) binding.
  • To optimize interface behaviors for enhanced reaction kinetics and thermodynamics on the nanofibrous membrane.

Main Methods:

  • Fabrication of a nanofibrous sensing platform.
  • Integration of proximity-induced DNA strand displacement (PiDSD) for signal generation.
  • Incorporation of catalytic hairpin assembly (CHA) for signal amplification.
  • Utilizing thioflavin T (ThT) binding for sensitive detection of the target biomarker (thrombin).

Main Results:

  • Achieved a limit of detection (LOD) as low as 1.0 pM for thrombin.
  • Demonstrated a wide linear detection range from 50 pM to 5 nM.
  • Exhibited excellent specificity and good long-term stability of the nanofibrous sensing platform.
  • The one-step method proved to be label-free and highly sensitive.

Conclusions:

  • The developed one-step nanofibrous sensing platform offers a highly sensitive and convenient method for protein biomarker detection.
  • This approach shows significant advantages over previous one-step thrombin detection methods, being label-free and more sensitive.
  • The platform holds strong potential for applications in point-of-care testing (POCT) and early disease diagnosis.