Biofunctionalized Chitosan Fibers for Multiplexed Antigen Capture
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Solution Overview
Problem
There is a need for fibers that are functionalized to impart distinct biological activities for use in analytical processes such as immunoanalysis, multiplexed analysis, and antigen capture, as existing methods lack effective solutions for these applications.
Innovation Solution
Biofunctionalized fibers made from chitosan-containing fibers biofunctionalized with histidine-tagged proteins and antibodies, allowing for the creation of protein fiber assemblies that can capture antigens and perform immunoanalysis and multiplexed analysis by binding specific antibodies to antigens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If standard fiber assembly methods are used, then fiber structures can be created, but fibers lack the biological functionality needed for immunoanalysis and antigen capture
Solution Approach 1:
The patent applies parameter changes by modifying fiber surfaces through chemical functionalization. Chitosan fibers are treated with glutaraldehyde to create reactive aldehyde groups, which then covalently bind to amino groups on antibodies. This chemical parameter transformation converts inert fiber surfaces into biologically active platforms capable of antigen capture and immunoanalysis.
Solution Approach 2:
The patent creates composite materials by combining chitosan fibers with antibodies and other biological molecules. The resulting hybrid structure integrates the mechanical properties of synthetic fibers with the biological recognition capabilities of antibodies, enabling both structural integrity and specific antigen binding functionality.
2Reliability
If fibers are functionalized with antibodies, then antigen capture capability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-activating fiber surfaces with glutaraldehyde treatment before antibody attachment. This creates a standardized reactive surface that simplifies subsequent antibody conjugation. The pre-functionalized fibers can be stored and later used for antibody coupling, separating the complex surface activation step from the antibody attachment step.
Solution Approach 2:
The patent uses glutaraldehyde as an intermediary crosslinking agent between fiber surfaces and antibodies. This intermediary molecule provides reactive groups on both ends, enabling stable covalent bonding between the inert fiber and the antibody while maintaining antibody functionality. This mediator approach simplifies the conjugation process compared to direct bonding methods.
3Adaptability or versatility
If multiple antibodies are assembled on fibers, then multiplexed analysis capability is improved, but assembly complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the multiplexed analysis system into individual fiber units, each functionalized with a specific antibody. Rather than attempting to assemble multiple antibodies on a single fiber, the system uses an array of separately functionalized fibers, where each fiber segment targets a specific antigen. This modular approach simplifies the functionalization process while enabling multiplexed detection.
Solution Approach 2:
The patent creates universal fiber platforms that can be functionalized with different antibodies through the same chemical protocol. The standardized glutaraldehyde activation method provides a universal interface for attaching various antibodies, allowing the same fiber type to serve multiple analytical functions by simply changing the antibody coating.
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 biofunctionalized fibers enable efficient antigen capture and immunoanalysis, with the ability to bind specific antigens and antibodies, demonstrating high specificity and versatility in one-dimensional, two-dimensional, and three-dimensional structures.
Implementation Method 1
Chitosan is a natural, linear polyaminosaccharide... It has a chemical structure similar to that of cellulose. Chitosan is known to be biodegradable, biocompatible, bioabsorbable and non-toxic with a strong antibacterial effect.
Implementation Method 2
The materials utilized for fibers vary widely and the choice of material for fibers depends on the intended use of the fibers. Various characteristics of the fibers may be characteristics natural to the fiber material or the fibers may be 'functionalized' to possess a desired characteristic.
Implementation Method 3
The resulting fiber assemblies are useful in applications such as antigen capture, immunoanalysis and multiplexed analysis.
Data Source
AI summary
Biofunctionalized fibers including a fiber platform and a histidine-tagged protein and, optionally, an antibody. Chitosan is a fiber useful as the fiber platform. The fiber platform may be treated with nickel or may be directly linked to the histidine-tagged protein e.g., histidine-tagged streptococcal IgG-binding protein, protein G, protein G3T, GFP or RFP. The resulting biofunctionalized fibers can be assembled into protein fiber assemblies by a variety of biofabrication methods. The fiber assemblies, e.g., in the form of woven fabrics, are useful for (i) antigen capture; (ii) immunoanalysis, and/or (iii) multiplexed analysis. In one fabrication, each fiber of a fiber assembly presents a specific antibody, and mixing and matching of fibers, for example by weaving of fabrics from various antibody-presenting fibers, allows for multiple antigens to be captured simultaneously for multiplexed analysis.