PCR-Free Target Genome Detection with ECL Hybridization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current molecular methods for pathogen detection, particularly PCR-based methods, are laborious, expensive, and unsuitable for use by unskilled personnel near the patient, limiting their potential for widespread application in diagnostics, especially in developing countries where infectious diseases are a major cause of mortality and morbidity.
Innovation Solution
A method combining Surface Cooperative Hybridization (SCH) of a target whole genome with specific probes on an ECL electrode surface, utilizing electrochemiluminescence for direct, rapid, and sensitive pathogen detection without amplification, using complementary ss-oligo probes to recognize specific genome sequences and form a supramolecular complex.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PCR-based molecular methods are used for pathogen detection, then detection sensitivity is improved, but device complexity and operational difficulty increase
Solution Approach 1:
The patent extracts and eliminates the amplification step from the molecular detection process, achieving direct detection of pathogen genomes without PCR. This removes the complex amplification machinery while maintaining detection sensitivity through electrochemiluminescence-based detection of hybridized probes.
Solution Approach 2:
The patent replaces the mechanical/chemical amplification process (PCR) with an electrochemical detection system. Instead of using enzymatic amplification, the method uses electrochemiluminescence signals generated by probe-target hybridization to achieve detection, substituting a simpler electrochemical system for the complex thermal cycling process.
2Measurement precision
If PCR-based methods are used, then detection accuracy is improved, but cost and labor requirements increase
Solution Approach 1:
The patent implements a self-service detection system where the probe-target hybridization and signal generation occur automatically without requiring skilled laboratory personnel. The electrochemiluminescence signal is generated intrinsically by the hybridization process itself, eliminating the need for complex manual intervention and specialized training.
Solution Approach 2:
The patent changes the detection parameter from amplification-based signal accumulation (PCR) to direct electrochemiluminescence signal generation. By detecting the luminescence signal directly from hybridized probes, the method achieves accurate detection without requiring the labor-intensive amplification process, making it suitable for point-of-care settings.
3Measurement precision
If amplification is used for detection, then sensitivity is improved, but detection time increases
Solution Approach 1:
The patent skips the time-consuming amplification step entirely by using direct detection methods. Instead of undergoing multiple cycles of denaturation and annealing to amplify the target, the method directly detects the pathogen genome through probe hybridization, rushing through the detection process in a single step.
Solution Approach 2:
The patent performs preliminary action by pre-incubating probes with the target genome before detection. The probes are designed to specifically bind to target sequences, and this pre-hybridization step enables direct detection without requiring subsequent amplification, thereby reducing overall detection time while maintaining sensitivity.
4Measurement precision
If conventional molecular methods are used, then detection capability is improved, but adaptability to point-of-care settings deteriorates
Solution Approach 1:
The patent segments the detection system into modular components that can be integrated into portable devices. The electrochemiluminescence detection system is designed as a self-contained unit that can be miniaturized for point-of-care use, separating the detection function from the complex amplification machinery that requires centralized laboratory infrastructure.
Solution Approach 2:
The patent changes the detection parameters to be compatible with portable devices by eliminating requirements for thermal cyclers and complex instrumentation. The electrochemiluminescence signal can be detected with simple electronics, enabling adaptation to handheld or portable diagnostic devices that can be deployed in resource-limited settings.
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 sensitive detection of pathogens at low concentrations (10 copies/reaction) with a portable and low-cost device, facilitating Point of Care testing, without requiring pre-treatment or labeling, and achieving a detection limit 37-170 times more efficient than PCR methods.
Implementation Method 1
combining the cooperative hybridization process of a macromolecular genetic target on the electrode surface derivatized with specific probes and combined with electrochemiluminescence (ECL)-based ultrasensitive detection
Implementation Method 2
the cooperative hybridization process of a macromolecular genetic target on the electrode surface derivatized with specific probes
Data Source
AI summary
The present invention relates to a method allowing a rapid and sensitive genome molecular detection, by the detection of nucleic acids thereof. Specifically, the method combines the cooperative hybridization process of a macromolecular genetic target on the electrode surface derivatized with an electrochemiluminescence (ECL)-based ultrasensitive detection. The method allows to directly detect a target genome without any amplification. Therefore, the method of the invention can be considered as an amplification-free approach, in particular a PCR-free approach.