Monoclonal Antibody EIS Biosensor for Point-of-Care T3SS Detection
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Solution Overview
Problem
Current laboratory-based diagnostics for bacterial infections are slow, expensive, require specialized equipment, and often yield false results, exacerbating the antibiotic resistance crisis, particularly for pathogens expressing the type III secretion system (T3SS).
Innovation Solution
Development of a monoclonal antibody (mAb)-based biosensor chip using electrochemical impedance spectroscopy (EIS) for rapid and accurate detection of T3SS components like EspB, which is highly specific and stable under various conditions, allowing point-of-care (POC) identification of pathogens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If laboratory-based diagnostic methods are used for bacterial infection detection, then detection accuracy can be maintained, but the process becomes slow and expensive requiring specialized equipment
Solution Approach 1:
The invention extracts the essential detection function from complex laboratory-based diagnostic systems by developing a simplified biosensor that specifically detects T3SS components. The biosensor chip isolates the critical detection element (monoclonal antibody against EspB) and removes unnecessary complexity, enabling rapid point-of-care testing without sacrificing accuracy for T3SS-expressing pathogens.
Solution Approach 2:
The invention replaces traditional mechanical/laboratory-based diagnostic systems with an electrochemical detection system. The biosensor uses electrochemical impedance spectroscopy (EIS) to detect bacterial presence, substituting complex laboratory procedures with an electrical measurement system that provides rapid results while maintaining detection accuracy.
2Adaptability or versatility
If traditional diagnostic methods are used, then comprehensive bacterial detection can be performed, but the cost and equipment requirements increase significantly
Solution Approach 1:
The invention applies local quality by designing a biosensor specifically optimized for detecting T3SS-expressing pathogens rather than attempting to detect all bacterial types. The monoclonal antibody is engineered to specifically recognize EspB protein unique to T3SS systems, providing highly adapted detection capability for this specific pathogen group while simplifying the overall device requirements.
Solution Approach 2:
The biosensor chip is designed as a disposable, low-cost device that can be used once and then discarded. This eliminates the need for expensive, complex equipment that requires maintenance and specialized operation. The single-use nature ensures consistency and reliability while dramatically reducing equipment complexity and operational costs.
3Productivity
If rapid detection methods are implemented, then treatment timing can be improved, but false positive results may increase
Solution Approach 1:
The invention performs preliminary action by pre-coating the biosensor chip surface with monoclonal antibodies specific to T3SS components before sample introduction. This pre-prepared state allows for immediate detection upon sample addition, enabling rapid results without compromising accuracy. The preliminary immobilization of antibodies ensures that only specific T3SS-expressing pathogens are detected, reducing false positives.
Solution Approach 2:
The invention introduces an intermediary element - the monoclonal antibody against EspB protein - that mediates between the sample and the detection system. This specific antibody acts as a selective gatekeeper that binds only to T3SS-expressing pathogens, ensuring that rapid detection does not sacrifice reliability. The antibody intermediary provides the specificity needed to avoid false positives while enabling fast detection.
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 mAb-EspB-B7 biosensor provides rapid, cost-effective, and sensitive detection of T3SS-expressing bacteria, reducing false positives and enabling timely treatment, thus mitigating antibiotic resistance.
Implementation Method 1
usable for identifying and/or quantifying at least one target in a sample by electrochemical impedance spectroscopy (EIS) analysis
Implementation Method 2
at least one of the electrodes is connected, directly or indirectly, to at least one target binding site/moiety... the target binding site and/or moiety, specifically binds the at least one target
Data Source
AI summary
The present disclosure relates to a biosensor chip device usable for identifying and/or quantifying a target in a sample by electrochemical impedance spectroscopy (EIS) analysis. The biosensor chip device disclosed herein comprises a plurality of electrodes connectable to at least one electronic device, wherein, at least one of the electrodes is a working electrode connected directly or indirectly to at least one target binding site and/or moiety. It should be noted that the target binding site and/or moiety specifically binds the at least one target or any component thereof. Still further, in some embodiments, the plurality of electrodes is configured for electrochemical impedance spectroscopy (EIS) analysis of the sample. More specifically, the invention relates to monoclonal-antibody-based biosensor chip, devices, kits and diagnostic methods for detection of pathogens expressing Type III secretion system (T3SS) in a sample.