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Portable T-2 Toxin Biosensor Based On Target-responsive Dna Hydrogel Using Water Column Height As Readout.

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Portable T-2 Toxin Biosensor Based On Target-responsive Dna Hydrogel Using Water Column Height As Readout.

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Portable T-2 toxin biosensor based on target-responsive DNA hydrogel using water column height as readout.

Meixiang Xue¹, Shuangxi Cai¹, Ye Deng²

¹Fujian Provincial Key Laboratory of Ecology Toxicological Effects & Control for Emerging Contaminants, Key Laboratory of Ecological Environment and Information Atlas, Fujian Provincial University, College of Environmental and Biological Engineering, Putian University, Putian, Fujian, 351100, PR China.

|May 8, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

A new portable sensor detects T-2 toxin, a dangerous mycotoxin in cereals. This simple, sensitive method uses a hyaluronic acid hydrogel and platinum nanoparticles for accurate T-2 toxin quantification.

Keywords:

Hydrogel Portable sensor T-2 toxin Target-responsive Water column height

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Author Spotlight: Engineering Molecular Tools for Disease Detection and Imaging

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Published on: December 8, 2023

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Area of Science:

Analytical Chemistry
Biotechnology
Materials Science

Background:

T-2 toxin is a highly toxic mycotoxin found in cereals, posing risks to human and animal health.
Sensitive, rapid, and uncomplicated detection methods for T-2 toxin are crucial for food safety.

Purpose of the Study:

To develop a portable, sensitive, and quantitative sensing system for T-2 toxin detection.
To enable accurate T-2 toxin analysis without requiring expensive equipment or specialized expertise.

Main Methods:

A hyaluronic acid (HA) hydrogel was created using DNA/aptamer hybrids and polyethyleneimine (PEI), incorporating platinum nanoparticles (Pt NPs).
The aptamer in the hydrogel specifically binds T-2 toxin, triggering hydrogel disruption and Pt NP release.
Released Pt NPs catalyze H2O2 decomposition, generating O2 gas that increases pressure and raises a water column in a capillary tube.

Main Results:

A linear correlation was observed between water column height and T-2 toxin concentration from 20 ng/mL to 6 μg/mL.
The sensing system demonstrated successful detection of T-2 toxin in real-world samples like barley tea and corn.
The method offers accurate quantitative analysis suitable for field applications.

Conclusions:

The developed portable sensing system provides a simple, sensitive, and accurate method for T-2 toxin detection.
This technology has potential applications in food safety monitoring and risk assessment.
The system overcomes limitations of traditional methods by being cost-effective and user-friendly.