Structured Electrophoretic Microgel Arrays for Rapid Multiplex Detection
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Solution Overview
Problem
Traditional nucleic acid detection methods, such as PCR, are time-consuming and require sophisticated infrastructure, limiting their application in rapid, multiplexed diagnostics, and there is a need for improved systems that can efficiently detect a diverse range of nucleic acid targets with enhanced robustness and speed.
Innovation Solution
The use of electrophoretic arrays with structured hydrogel microgel deposits that create optimized localized reaction environments for nucleic acid amplification, facilitating rapid molecular transport, efficient capture, and concentration of amplicons, using hydrogel matrices with defined three-dimensional porous structures and pre-anchored target-specific components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional PCR methods are used for nucleic acid detection, then detection accuracy can be achieved, but detection time is excessive and infrastructure requirements are complex
Solution Approach 1:
The patent replaces the thermal cycling mechanical system of PCR with an isothermal electrokinetic system. Electric fields are applied to the microgel array to drive target capture, hybridization, and amplification reactions at constant temperature, eliminating the need for complex thermal cycler equipment while maintaining detection accuracy and reducing time to 8-20 minutes.
Solution Approach 2:
The patent changes the temperature parameter from dynamic thermal cycling to constant isothermal conditions. By maintaining a single optimal temperature for the enzymatic reactions and using electric fields to enhance reaction kinetics, the system achieves rapid amplification without the time-consuming heating and cooling cycles of traditional PCR.
2Measurement precision
If traditional PCR methods are used for nucleic acid detection, then detection accuracy can be achieved, but infrastructure requirements become sophisticated and complex
Solution Approach 1:
The patent replaces sophisticated thermal cycling equipment with simple isothermal reaction conditions combined with electric field application. The microgel array device requires only basic electrophoresis equipment and constant temperature incubation, dramatically simplifying the infrastructure while preserving detection accuracy through the structured microgel environment that enhances reaction efficiency.
Solution Approach 2:
By changing from dynamic temperature control to isothermal conditions with electric field enhancement, the patent eliminates the need for complex thermal cycler machinery. The structured microgel deposits provide a confined environment that maintains optimal reaction conditions without requiring sophisticated equipment, making the system suitable for resource-limited settings.
3Adaptability or versatility
If array-based formats are used for multiplexed detection, then detection breadth is improved, but reaction efficiency and detection speed decrease
Solution Approach 1:
The patent applies local quality by creating structured microgel deposits with optimized physical and chemical properties at each array location. These microgels provide confined reaction environments with enhanced local concentration of reagents and targets, improving reaction efficiency. Electric fields are applied locally to each microgel region to accelerate target capture and hybridization, enabling rapid multiplexed detection across multiple targets simultaneously.
Solution Approach 2:
The structured microgel deposits act as intermediaries between the electric field and the biochemical reactions. The microgels concentrate targets and reagents through electrokinetic effects, enhance hybridization kinetics, and provide a confined environment for efficient amplification. This intermediary structure enables rapid reaction kinetics while maintaining the multiplexed format, resolving the contradiction between detection breadth and speed.
4Device complexity
If isothermal amplification techniques are used, then instrumentation requirements are simplified, but reaction efficiency and detection sensitivity decrease
Solution Approach 1:
The structured microgel deposits serve as intermediaries that enhance isothermal amplification efficiency. The microgels concentrate targets and reagents through their porous structure and electrokinetic properties, increasing local reaction rates and sensitivity. Electric fields applied to the microgels further enhance target capture and hybridization efficiency, compensating for the lack of thermal cycling while maintaining simplified instrumentation requirements.
Solution Approach 2:
The patent optimizes the isothermal reaction parameters by using structured microgel environments with controlled porosity, cross-linking density, and chemical composition. These parameter optimizations enhance reaction efficiency and sensitivity at constant temperature, achieving detection performance comparable to or better than thermal cycling methods while maintaining simple instrumentation requirements.
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, sensitive, and multiplexed detection of nucleic acid targets within 8-20 minutes, improving detection speed and breadth across diverse targets, including pathogens like Neisseria meningitidis and Escherichia coli, with optimized localized reaction environments and efficient biochemical reactions.
Implementation Method 1
Electrophoretic arrays, which employ electric fields to actively transport and concentrate charged biomolecules like DNA and RNA at specific locations
Implementation Method 2
a three-dimensional hydrogel matrix, said matrix comprising: (a) a cross-linked polymer; (b) an immobilized affinity-binding molecule; and (c) a porogen-derived pore network defining interconnected void spaces within said matrix
Data Source
AI summary
Methods and devices are disclosed for rapid, multiplex molecular detection of diverse nucleic acid target molecules. The invention features an electrophoretic array with immobilized hydrogel microgel deposits. Each deposit comprises a three-dimensional, cross-linked polymer matrix containing an immobilized affinity-binding molecule and a porogen-derived pore network. This structure is configured for rapid molecular transport of nucleic acids (e.g., up to 800 bp), providing a localized environment for target capture, ligation of linear Rolling Circle Amplification (RCA) probes, and RCA. Target-specific components are anchored within distinct microgels for multiplexing. Electric fields enhance transport, reaction kinetics, and amplicon concentration. Detection is achieved in under 20 minutes. The specifically structured and fabricated microgels improve detection speed, sensitivity, and applicability to multiple different targets.