Paper-Based PCR Amplicon Detection Using Capillary Nanoparticle Separation
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Solution Overview
Problem
Existing PCR techniques require skilled operators, complex processes, and expensive devices, limiting their use in point-of-care testing (POCT) environments, and existing detection methods are cumbersome and require additional steps or specialized equipment.
Innovation Solution
A paper-based nucleic acid-detecting sensor and kit using a negatively-charged porous substrate with a separation layer and capture nanoparticles, allowing for visual detection of PCR amplicons without additional devices or complex steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional PCR detection methods are used, then detection accuracy is improved, but device complexity and operational difficulty increase
Solution Approach 1:
The invention extracts and isolates the essential detection function from the complex PCR system by using a paper-based sensor that directly detects PCR amplicons without requiring sophisticated instrumentation. The sensor captures and visualizes amplification products through simple color changes, separating the detection step from the complex thermal cycling and analysis equipment.
Solution Approach 2:
The patent employs a disposable paper-based sensor that is inexpensive, single-use, and eliminates the need for expensive, reusable detection devices. The paper sensor incorporates all necessary detection components in a low-cost format that can be discarded after one use, removing the need for maintaining complex equipment.
2Measurement precision
If conventional PCR detection methods are used, then detection accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
The paper-based sensor performs detection automatically through capillary action, where the PCR amplicon solution self-migrates through the paper matrix without requiring external pumping or manipulation. The sensor self-visualizes results through inherent color changes, eliminating the need for skilled operators to perform complex analysis procedures.
Solution Approach 2:
The invention replaces manual manipulation and complex mechanical detection systems with passive paper-based capillary transport and optical visualization. The paper sensor substitutes sophisticated mechanical analysis equipment with simple visual color assessment that can be performed by anyone regardless of technical expertise.
3Reliability
If conventional PCR detection methods are used, then detection reliability is improved, but loss of time increases
Solution Approach 1:
The paper-based sensor is pre-prepared with all necessary detection components, including capture probes and visualization reagents, before use. This preliminary preparation eliminates the need for time-consuming setup steps during actual detection, allowing immediate analysis of PCR amplicons as they are produced.
Solution Approach 2:
The detection process maintains continuous action from PCR amplification through to visualization without interruption. The paper sensor continuously captures and processes amplicons as they are generated, eliminating idle time between amplification and detection steps that characterizes conventional methods.
4Measurement precision
If conventional PCR detection methods are used, then detection precision is improved, but manufacturing complexity increases
Solution Approach 1:
The invention uses porous paper as the sensor substrate, which provides a simple yet effective matrix for capturing and transporting PCR amplicons. The porous structure naturally facilitates capillary action and molecule capture without requiring complex fabrication processes, making manufacturing straightforward while maintaining detection precision.
Solution Approach 2:
The paper-based sensor integrates multiple functional components into a single composite material system. The paper incorporates capture probes, transport channels, and visualization elements in one unified structure, simplifying manufacturing by eliminating the need to assemble multiple separate components.
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
Enables rapid, accurate, and reproducible detection of target nucleic acids in PCR amplicons with the naked eye, suitable for POCT environments, eliminating the need for culturing or diluting steps and reducing reliance on external equipment.
Implementation Method 1
a negatively-charged porous first paper substrate; a separation layer stacked on one surface of the first paper substrate
Implementation Method 2
a separation layer stacked on one surface of the first paper substrate and including any one of Sepharose beads, glass beads and a mixture thereof
Implementation Method 3
allowing for visual detection of PCR amplicons without additional devices or complex steps
Data Source
AI summary
The present invention provides a paper-based, nucleic acid-detecting sensor capable of easily and simply detecting the presence of a target nucleic acid from a PCR amplicon. In addition, the present invention provides a paper-based, nucleic acid-detecting kit capable of easily and simply detecting the presence of a target nucleic acid from a PCR amplicon and a nucleic acid detecting method using same. The present invention can easily and simply determine the presence or absence of a target nucleic acid in a PCR amplicon by utilizing the function in which the target nucleic acid is associated with nanoparticles to form a composite and when loaded into the sensor, the composite is separated and moves according to the structure of the sensor and is finally visualized on the sensor.