Viral Particle Labeling via Polyvalent Cation-Mediated Polymer Binding
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Solution Overview
Problem
Current viral detection methods are not rapid, sensitive, specific, and cost-effective, making it difficult to diagnose and identify viruses efficiently, especially in complex biological fluids, and existing techniques require lengthy incubation times and expensive reagents.
Innovation Solution
Functionalize particles with a negatively charged polymer by contacting them with a polyvalent cation and the polymer, allowing for rapid and specific labeling of viral particles in biological fluids without purification or amplification steps, using polyvalent cations like calcium to facilitate binding between the particle and polymer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional viral detection methods (virus culture, RT-PCR) are used, then detection sensitivity and specificity are improved, but detection time increases significantly (7-10 days for culture, several hours for RT-PCR)
Solution Approach 1:
The patent uses fluorescently-labeled polymers as intermediaries that bind to viral particles through polyvalent cation-mediated interactions. This intermediary approach enables direct visualization and detection of viruses without requiring complex amplification steps, achieving rapid detection within minutes while maintaining sensitivity through the fluorescent labeling mechanism.
Solution Approach 2:
The invention replaces complex biochemical amplification systems (RT-PCR) with a simpler optical detection system using fluorescently-labeled polymers. This substitution eliminates the need for thermal cycling and complex reagents, reducing detection time from hours to minutes while maintaining detection capability through direct fluorescent imaging of virus-polymer complexes.
2Loss of time
If antigen-based rapid diagnostic tests using antibodies are used, then detection time is reduced (less than 30 minutes), but detection sensitivity decreases (as low as 62.3%) and false positives/negatives increase
Solution Approach 1:
The patent employs disposable fluorescently-labeled polymers that bind to viral particles and can be directly visualized. These polymers serve as single-use detection reagents that eliminate the need for expensive, specialized antibodies while maintaining high detection sensitivity. The fluorescent label provides immediate visual confirmation, achieving both rapid detection and high accuracy without the limitations of antibody-based tests.
3Quantity of substance
If flow cytometry-based virus quantification using fluorescent dyes is used, then virus quantification is achieved, but incubation time increases (at least 30 minutes) and expensive reagents are required
Solution Approach 1:
The fluorescently-labeled polymers serve multiple functions simultaneously: they bind to viral particles, provide fluorescent labeling for detection, and enable quantification through direct imaging. This multi-functional approach eliminates the need for separate incubation and detection steps required by conventional flow cytometry, achieving virus quantification within minutes using the same reagent system.
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 instantaneous labeling and detection of viruses in complex biological fluids with high sensitivity and specificity, reducing detection time to minutes and eliminating the need for expensive reagents, while being applicable to a wide range of viral particles.
Implementation Method 1
contacting them with a polyvalent cation and the polymer, allowing for rapid and specific labeling of viral particles... using polyvalent cations like calcium to facilitate binding between the particle and polymer
Data Source
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.