Flow-Through Electrochemical Detection System for Nucleic Acid
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Solution Overview
Problem
Current methods for detecting nucleic acid polymers are labor-intensive and have low sensitivity, particularly in distinguishing similar nucleic acid polymers.
Innovation Solution
A flow-through electrochemical detection system that uses a porous working electrode with nucleic acid polymer-capturing molecules, allowing for the specific detection of target nucleic acid polymers through a sandwich hybridization format and the generation of an electrical current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional nucleic acid detection methods are used, then detection can be performed, but the methods are labor-intensive and have low sensitivity
Solution Approach 1:
The patent replaces conventional mechanical/manual detection methods with an automated electrochemical detection system. The system uses a porous electrode where nucleic acid capture and detection occur through electrochemical reactions that generate measurable currents, eliminating labor-intensive manual operations while significantly improving detection sensitivity and reducing detection time
Solution Approach 2:
The patent employs a porous electrode material that allows large volumes of sample to pass through while providing extensive surface area for nucleic acid capture. The porous structure enables efficient interaction between the sample and capture molecules, enhancing detection sensitivity without requiring manual processing, thus resolving the contradiction between detection sensitivity and time consumption
2Measurement precision
If conventional detection methods are used, then detection can be performed, but they have low ability to distinguish similar nucleic acid polymers
Solution Approach 1:
The patent replaces complex manual analysis procedures with an electrochemical detection system that inherently provides high specificity. The system uses specifically designed capture molecules that selectively bind to target nucleic acid sequences, and the electrochemical readout automatically distinguishes specific binding events from non-specific interactions, achieving high detection specificity without increasing operational complexity
Solution Approach 2:
The patent uses electrochemical signal amplification where each specific nucleic acid binding event generates a measurable electrical current. This signal amplification mechanism allows the system to distinguish specific from non-specific binding through signal intensity, providing high detection specificity while maintaining a relatively simple system architecture
3Measurement precision
If large sample volumes are processed, then more target polynucleotide can be captured, but current methods cannot detect minute quantities effectively
Solution Approach 1:
The patent uses a porous electrode that can process large volumes of sample while maintaining high detection sensitivity. The porous structure provides extensive surface area for capture molecules, enabling efficient capture of target nucleic acids from large sample volumes. The electrochemical detection method then amplifies the signal from captured targets, allowing detection of minute quantities even after processing large volumes, thus resolving the contradiction between sample volume and detection limit
Solution Approach 2:
The patent replaces manual concentration and analysis procedures with an electrochemical detection system that can directly detect minute quantities of target nucleic acid in large sample volumes. The electrochemical reactions provide signal amplification, enabling detection of trace amounts without requiring manual concentration steps, thereby achieving low detection limits while processing large volumes
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 system enables fast and reliable detection of minute quantities of target nucleic acid polymers, even in large sample volumes, without relying on antibodies, and demonstrates high sensitivity and specificity.
Implementation Method 1
nucleic acid polymer-capturing molecules bound to the porous working electrode bind to any target nucleic acid polymer in the sample
Implementation Method 2
using a chemical or enzymatic reaction that generates a measurable electric current when the target nucleic acid polymer is present
Data Source
AI summary
A flow-through electrochemical detection system determines if a target nucleic acid polymer is present in a sample. This system contains, at a minimum, an assay reaction chamber that contains a porous working electrode to which target nucleic acid polymer capturing molecules are bound. As a sample passes through the working electrode, any target nucleic acid polymer present in the sample binds to the target nucleic acid polymer capturing molecules. After the sample passes through the flow-through electrochemical detection system, target nucleic acid polymer detectors are placed inside the assay reaction chamber and bind to any target nucleic acid polymer present. The target nucleic acid polymer detectors contain a means for generating an electric current when exposed to a chemical or an enzyme. A potentiostat connected to the working electrode measures the generated current, thereby detecting the presence and quantity of the target nucleic acid polymer in the sample.