Nanoparticle Antigen Detection System for Rapid Pathogen Screening
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Solution Overview
Problem
Current methods for detecting airborne pathogens, particularly SARS-CoV-2, are inefficient, time-consuming, expensive, and prone to false results, lacking the ability to rapidly and reliably identify infected individuals in high-throughput settings.
Innovation Solution
A system comprising a first container for collecting exhaled aerosols and a second container with solvent containing nanoparticles linked to antibodies, where a change in optical properties indicates antigen presence, utilizing a light source and sensor for rapid detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional pathogen detection methods are used, then detection accuracy may be maintained, but detection time is excessive and throughput is low
Solution Approach 1:
The invention extracts the pathogen detection function from complex conventional testing systems and implements it through a simplified nanoparticle-based colorimetric assay. The detection system uses antibody-functionalized nanoparticles that directly bind to pathogen antigens in respiratory droplets, eliminating the need for complex sample preparation, amplification steps, and specialized equipment required by conventional PCR or culture methods. This extraction of the core detection function enables rapid high-throughput screening while maintaining accuracy.
Solution Approach 2:
The invention replaces complex mechanical and chemical detection systems with an optical detection system based on nanoparticle color changes. Instead of using elaborate instrumentation for pathogen detection, the system utilizes the inherent optical properties of antibody-coated nanoparticles that change color when they bind to target antigens. This substitution of mechanical/chemical detection with optical detection dramatically reduces detection time and enables parallel processing of multiple samples simultaneously.
2Reliability
If conventional detection systems are used, then reliability may be maintained, but device complexity and cost increase
Solution Approach 1:
The invention employs disposable nanoparticle-based test strips or wells that contain pre-functionalized antibodies on nanoparticle surfaces. These single-use detection elements eliminate the need for expensive, complex instrumentation while maintaining reliable detection. Each disposable unit is pre-prepared with the necessary reagents and antibody coatings, ensuring consistent performance without requiring complex device maintenance or calibration. The simplicity of the disposable format reduces both device complexity and operational costs while preserving detection reliability through standardized manufacturing of the nanoparticle-antibody conjugates.
3Measurement precision
If conventional detection methods are used, then comprehensive analysis may be achieved, but false positives and negatives increase
Solution Approach 1:
The invention employs multiple types of nanoparticles functionalized with different antibodies that recognize specific epitopes on the pathogen surface. Each nanoparticle type provides localized detection of specific antigenic determinants, and the combined readout provides comprehensive characterization of the pathogen presence. This multi-epitope approach using nanoparticles with different antibody specificities reduces false positives and negatives by requiring concordant signals from multiple independent detection channels, thereby improving measurement precision while eliminating the harmful effect of false results.
Data Source
AI summary
A system for antigen detection is provided that includes a first container configured to collect aerosols out of exhaled air of a human and a second container suitable for a solvent, wherein nanoparticles are dissolved in the solvent and the nanoparticles are linked to antibodies. A change of optical properties of the solvent is detectable upon contact between the antibodies and matching antigens. Aerosols exhaled in the air stick in a filter on one side of the first container. Thereupon, the first container is incooperable in the second container, in which a solvent with nanoparticles dissolved therein and antibodies coupled thereto are located. If antigens matching the antibodies are present on the aerosols, the nanoparticles agglomerate around the antigen, changing the optical properties of the solvent, which is irradiated by a light source and detectable by a light sensor.