Functionalized Nano-probe for Single-cell Electrochemical Toxin Detection
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Solution Overview
Problem
Current toxicity assessment methods for T-2 fungal toxins rely on multicellular experiments and animal tests, which are costly, time-consuming, and lack sensitivity and real-time monitoring capabilities, while existing single-cell-based sensors have limitations in detecting drug effects and require further research.
Innovation Solution
A single-cell-based electrochemical sensor using a functionalized nano-probe, where a capillary is pulled into a nano-microneedle, coated with gold nanoparticles, and modified with Prussian blue, is used for direct electrochemical detection of T-2 toxins, allowing for real-time cytotoxicity evaluation by measuring hydrogen peroxide levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multicellular experimental methods are used for toxicity assessment, then the cost is low and the cycle is short, but the sensitivity is low and real-time monitoring cannot be realized
Solution Approach 1:
The patent transitions from multicellular bulk detection to single-cell detection, segmenting the measurement target into individual cells. This segmentation enables higher sensitivity by detecting signals from single cells rather than averaging across populations, while the standardized microelectrode interface maintains experimental simplicity through automated cell-by-cell measurement protocols
Solution Approach 2:
The patent introduces microelectrodes as intermediaries that penetrate single cells to directly measure intracellular potentials and currents. These microelectrodes serve as mediators between the cellular interior and external measurement systems, enabling real-time monitoring of electrical signals with high temporal resolution while maintaining a relatively simple experimental setup
2Reliability
If animal toxicology experiments are conducted, then comprehensive and systematic effects can be reflected, but the cost is high, the cycle is long, and repeatability is unsatisfactory
Solution Approach 1:
The patent extracts the essential toxicity assessment function from complex animal models and concentrates it into simplified in vitro single-cell measurements. By taking out the core measurement need (cellular response to toxins) and removing unnecessary complexity (whole-organism systems), the method achieves high repeatability through standardized protocols while dramatically reducing experimental time and cost
Solution Approach 2:
The patent changes the scale parameter from whole-organism (animal) to single-cell level, and from endpoint assessment to real-time continuous monitoring. This parameter change enables repeated measurements on the same cell population under identical conditions, significantly improving repeatability while reducing the experimental cycle from weeks/months to hours/days
3Object-affected harmful factors
If nanoelectrodes are used for intracellular measurement, then cellular damage is minimized, but the device complexity increases
Solution Approach 1:
The patent applies local quality by using small-diameter microelectrodes (1-10 μm) specifically at the cell-penetration interface, while the rest of the measurement system remains macroscopic and relatively simple. The localized nanoscale feature minimizes cellular damage during penetration, while the overall device complexity is managed by keeping the electrode fabrication and measurement protocols standardized and accessible
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The sensor provides higher sensitivity and lower detection limits for T-2 toxins, minimizing cellular damage and enabling real-time monitoring, thus offering a reliable and efficient method for evaluating cytotoxicity and understanding toxin mechanisms.
Implementation Method 1
electrochemical detection is conducted in 5 min... The sensor provides higher sensitivity and lower detection limits for T-2 toxins
Implementation Method 2
a capillary is pulled into a nano-microneedle, coated with gold nanoparticles
Implementation Method 3
modified with Prussian blue, is used for direct electrochemical detection of T-2 toxins
Data Source
AI summary
The disclosure provides a single-cell-based electrochemical sensor based on a functionalized nano-probe and an application thereof, and belongs to the technical fields of electrochemical sensors and toxin detection. The single-cell-based electrochemical sensor of the disclosure combines a nano-probe and an electrochemical cell-based sensor, conducts functional modification on the nano-probe using Prussian blue, and conducts current signal analysis on a single cell by a micro-operating platform. The disclosure constructs a reliable, easy to operate and highly repeatable single-cell-based electrochemical detection platform, and the current value is determined by electrochemical chronoamperometry to determine damage of a single cell stimulated by toxins, thereby quickly and effectively evaluating the cytotoxicity of fungal toxins, and further enabling application of the fungal toxin toxicity in real-time monitoring and nano-environmental detection in living cells.