Crosslinker Affinity Tuning for Viral Trapping in Mucosal Secretions
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Solution Overview
Problem
Current methods for trapping viruses in mucosal secretions, such as cervicovaginal mucus, face challenges in optimizing the affinity of antibodies to mucins and antigen binding kinetics, which affects the efficacy of viral trapping and protection against infections like HIV, requiring a more potent 'muco-trapping' mechanism to reduce virus diffusion and enhance protection.
Innovation Solution
A mathematical model is developed to simulate the diffusion of HIV through cervicovaginal mucus containing neutralizing IgG, allowing for the tuning of IgG-mucin affinity and IgG-antigen binding kinetics to optimize antibody performance, and crosslinkers are selected based on this model to enhance viral trapping and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If IgG accumulates on the virus surface to generate sufficient avidity for trapping, then viral trapping efficacy is improved, but the time required for accumulation increases, reducing the window of opportunity before virus reaches target cells
Solution Approach 1:
The patent applies parameter changes by modifying the affinity of IgG for mucins (changing the binding strength parameter) to optimize the trapping mechanism. By tuning the affinity parameter, the system achieves effective viral trapping within the limited time window without requiring extensive accumulation time, thus resolving the contradiction between trapping efficacy and time loss.
2Reliability
If IgG has increased affinity to mucins for effective crosslinking, then viral trapping is enhanced, but the diffusional freedom of mucin-bound IgG is reduced, limiting the rate of binding to antigens on the virus surface
Solution Approach 1:
The patent resolves this contradiction by changing the affinity parameter of IgG to mucins to an optimal intermediate value. This optimized parameter allows sufficient trapping enhancement while maintaining adequate diffusional freedom for antigen binding, thus simultaneously achieving both improved trapping and maintained binding speed.
3Productivity
If fewer number of virus-bound IgG is needed for trapping with increased individual IgG-mucin affinity, then trapping efficiency is improved, but the greater affinity reduces diffusional freedom and limits binding rates
Solution Approach 1:
The patent applies parameter changes by optimizing the IgG-mucin affinity to a specific range that achieves high trapping efficiency with a minimal number of IgG molecules while preserving sufficient diffusional freedom for rapid antigen binding. This optimized parameter balance resolves the contradiction between productivity and speed.
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 approach optimizes antibody performance by selecting crosslinkers with specific binding affinities, effectively trapping viruses and reducing their diffusion through mucosal secretions, thereby enhancing protection against vaginal HIV transmission.
Implementation Method 1
The crosslinker noncovalently binds the target of interest to the substrate of interest
Implementation Method 2
as IgG accumulates on the virus surface, the array of virion-bound IgG can collectively impart to the individual virion multiple weak Ab-mucin bonds, thereby generating sufficient avidity to slow or even immobilize individual virions in mucus
Data Source
AI summary
The presently-disclosed subject matter relates to crosslinkers, compositions, and methods for trapping a target of interest on a substrate of interest. The methods may be used to inhibit and treat pathogen infection and provide contraception. The methods may be used to trap or separate particles and other substances. The subject matter further relates to methods of identifying and preparing optimal crosslinkers and methods for manipulating targets of interest.