Enveloped Virus Labeling via Cation-Polymer Optical Detection
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Solution Overview
Problem
Current viral detection methods are not rapid, sensitive, specific, and cost-effective, limiting their effectiveness in diagnosing and quantifying viruses, particularly enveloped viruses, which are crucial for timely antiviral treatment and disease management.
Innovation Solution
Functionalizing particles with a negatively charged polymer using a polyvalent cation to bind to the particle, allowing for rapid and specific optical detection and quantification of enveloped virus particles without the need for purification or amplification steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional viral detection methods (virus culture, RT-PCR, antigen-based rapid tests) are used, then detection sensitivity and specificity are improved, but detection time is significantly increased
Solution Approach 1:
The patent uses fluorescently labeled polymers as intermediary agents that bind to viral particles through polyvalent cation-mediated interactions. This intermediary approach enables direct visualization and quantification of viruses without requiring time-consuming amplification or culture steps, achieving both high sensitivity and rapid detection simultaneously
Solution Approach 2:
The patent replaces complex biochemical amplification systems (RT-PCR) and cellular culture systems with a direct optical detection system using fluorescent labeling. This substitution eliminates multiple processing steps while maintaining detection sensitivity through the high signal-to-noise ratio of fluorescent microscopy
2Measurement precision
If fluorescent dyes are used to label viral particles for flow cytometry, then virus quantification is improved, but labeling time and process complexity are increased
Solution Approach 1:
The patent employs self-assembling fluorescent complexes where polyvalent cations spontaneously bridge the negatively charged viral envelope and fluorescently labeled polymers. This self-service mechanism eliminates the need for complex incubation protocols and manual labeling steps, achieving rapid quantification within minutes
Solution Approach 2:
The patent creates composite fluorescent labels by combining polymers with fluorescent dyes and polyvalent cations. This composite material approach provides both strong fluorescent signal for accurate quantification and rapid binding kinetics, outperforming simple dye labels while reducing labeling time
3Measurement precision
If transmission electron microscopy is used to image and quantify virus particles, then detection sensitivity and visualization capability are improved, but equipment cost and accessibility are worsened
Solution Approach 1:
The patent uses fluorescent labeling to make invisible viral particles visible under optical microscopy. The fluorescent signal provides contrast and visualization capability similar to electron microscopy, but using accessible optical equipment rather than expensive electron microscopes, thereby reducing device complexity and cost
Solution Approach 2:
The patent creates optical copies of viral particles through fluorescent labeling, allowing visualization and quantification using standard optical microscopy equipment. This copying approach replicates the visualization capability of electron microscopy using far more accessible and less expensive equipment
4Loss of time
If antigen-based rapid diagnostic tests are used, then detection time is reduced, but detection sensitivity and reliability are worsened
Solution Approach 1:
The patent uses fluorescently labeled polymers as intermediaries that directly bind to viral particles, providing a more reliable and sensitive detection mechanism than antibody-antigen recognition. This intermediary approach maintains rapid detection while improving sensitivity by avoiding issues with antibody variability and improper sample collection
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 method enables instantaneous labeling and detection of viruses in complex biological fluids, providing high sensitivity and cost-effectiveness, with the ability to quantify virus concentrations and assess aggregation, suitable for a wide range of enveloped viruses.
Implementation Method 1
contacting the particle with (i) a polyvalent cation and (ii) the polymer; such that the polymer binds to the particle
Data Source
Figure 1A~1K
Figure 2A~2F
Figure 3A~3C
AI summary
Provided herein is a method of functionalizing a particle, as well as methods of optically tracking a particle, isolating enveloped viral particles from a sample, quantifying enveloped virus particles in a sample and assessing enveloped viral aggregation in a sample. Kits are also provided. The particle is typically a viral particle.