Electrochemical pH Detection for Nucleic Acid Amplification
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Solution Overview
Problem
Current nucleic acid amplification methods, such as PCR, require thermal cycling and expensive optical devices for quantification, limiting their use in point-of-care settings due to high costs and long reaction times, especially for low nucleic acid concentrations.
Innovation Solution
A method using a three-electrode electrochemical cell with quinones, quinone derivatives, or pH indicators to quantify pH changes, enabling rapid and sensitive detection of target polynucleotides without the need for optical devices, by measuring electrochemical responses such as current and potential changes during nucleic acid amplification reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional PCR methods are used for nucleic acid amplification, then amplification accuracy is maintained, but reaction time increases and cost increases due to thermal cycling requirements
Solution Approach 1:
The patent changes the detection parameter from optical signals requiring thermal cycling to electrochemical signals that can be measured isothermally. By using redox-active dyes and measuring electrochemical responses, the method maintains amplification accuracy while eliminating the need for thermal cycling, thereby reducing reaction time
2Measurement precision
If optical detection methods are used for quantification, then quantification accuracy is improved, but device cost increases due to expensive optical devices
Solution Approach 1:
The patent substitutes optical detection systems with electrochemical detection systems. By using redox-active dyes that produce electrochemical signals during amplification, the method achieves accurate quantification using simple electrochemical sensors instead of expensive optical devices, thereby reducing device complexity and cost
Solution Approach 2:
The patent changes the detection parameter from optical properties to electrochemical properties. By measuring electrochemical responses such as current or potential changes instead of optical signals, the method maintains quantification accuracy while using simpler, less expensive electrochemical measurement devices
3Loss of time
If isothermal amplification methods are used, then reaction time is reduced, but sensitivity for low nucleic acid concentrations deteriorates
Solution Approach 1:
The patent introduces redox-active dyes as intermediaries that amplify the signal during isothermal amplification. These dyes undergo redox reactions that produce measurable electrochemical signals, enhancing the sensitivity for detecting low nucleic acid concentrations while maintaining the speed advantages of isothermal methods
4Measurement precision
If expensive optical devices are used for detection, then detection sensitivity is improved, but ease of operation deteriorates due to complex equipment requirements
Solution Approach 1:
The patent replaces complex optical detection equipment with simple electrochemical sensors. By measuring electrochemical responses from redox-active dyes, the method achieves high detection sensitivity using minimal, easy-to-operate equipment, thereby improving ease of operation while maintaining detection sensitivity
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
This approach allows for accurate and rapid quantification of target polynucleotides with reduced reaction times and costs, making it suitable for point-of-care diagnostics by leveraging electrochemical signals from quinones and pH indicators in a three-electrode system.
Implementation Method 1
the solution comprises a compound capable of undergoing a change in its oxidation state and/or structural conformation as a function of the pH of the solution
Implementation Method 2
the pH of the solution is quantified as a function of the electrochemical response of the solution in a two or three-electrode electrochemical cell
Implementation Method 3
the solution comprises a compound capable of undergoing a change in its oxidation state and/or structural conformation as a function of the pH of the solution
Data Source
AI summary
Disclosed herein is a more sensitive and accurate method of monitoring the pH of a solution, wherein the pH of the solution is quantified as a function of the electrochemical response of the solution in a two or three-electrode electrochemical cell, wherein the solution comprises a compound capable of undergoing a change in its oxidation state and/or structural conformation as a function of the pH of the solution. Also disclosed are highly accelerated methods and processes enabling analysis of specific polynucleotide sequences in a sample, e.g. a biological sample. The methods disclosed herein are, for example, useful for rapid screening of a large amount of samples in a point-of-care setting.