Stabilizing Components for Immunoassay Sensitivity
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Solution Overview
Problem
Current immunoassays face challenges in achieving high sensitivity and accuracy due to issues such as sample size limitations, immobilization and capture difficulties, interference between antibodies and proteins, and labor-intensive and costly processes.
Innovation Solution
The development of immune complexes comprising a target conjugate pair and a stabilizing component, where the stabilizing component binds to the target conjugate pair, increasing the association constant (Ka) and decreasing the dissociation constant (Kd) of the complex, thereby enhancing the sensitivity and specificity of the detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional immunoassays are used for detecting disease biomarkers, then the detection process is relatively simple, but the sensitivity and accuracy are insufficient
Solution Approach 1:
The patent introduces Fc gamma receptors as intermediary molecules that bind to the Fc portion of IgG antibodies in the target conjugate pair. This intermediary binding creates additional stabilization of the immune complex, enhancing the overall association constant and improving detection sensitivity without fundamentally changing the immunoassay workflow
Solution Approach 2:
The patent creates composite immune complexes that combine multiple components: the target antigen, the antibody (with Fc portion), and the Fc gamma receptor. This composite structure leverages multiple binding interactions simultaneously, resulting in enhanced complex stability and improved analytical sensitivity while maintaining assay feasibility
2Measurement precision
If antibodies and antigens are used for specific binding in immunoassays, then the binding affinity is high, but interference between antibodies and proteins reduces accuracy
Solution Approach 1:
The Fc gamma receptor acts as a mediator that specifically recognizes the Fc portion of the antibody rather than interfering with the antigen-antibody binding interface. This intermediary binding provides an additional stabilization mechanism that is orthogonal to the primary specific binding, thereby improving accuracy without being affected by protein interference at the antigen-binding site
3Productivity
If standard immunoassay protocols are used, then the process is relatively quick, but labor-intensive and costly procedures reduce productivity
Solution Approach 1:
The stabilizing component (Fc gamma receptor) is designed to naturally bind to the Fc portion of IgG antibodies, creating a pre-configured stabilization mechanism that requires no additional preparation steps. The enhanced complex stability is achieved through this built-in preliminary action, improving detection efficiency without extending assay time
Solution Approach 2:
The Fc gamma receptor provides self-service stabilization by automatically binding to the Fc portion of the antibody in the target conjugate pair. This self-stabilization mechanism occurs naturally during the assay process without requiring additional reagents, steps, or manual intervention, thereby improving productivity while maintaining reasonable assay timing
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 use of stabilizing components in the immune complexes significantly improves the analytical sensitivity and specificity of immunoassays, allowing for more accurate and sensitive detection of targets associated with disease states, such as human immunoglobulins.
Implementation Method 1
the stabilizing component binds to the target conjugate pair, where the association constant (Ka) of the complex is greater than the Ka of the complex without the stabilizing component
Data Source
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AI summary
The disclosure provides an in vitro diagnostic method that is sensitive and accurate for detection and quantification of targets of interest that are associated with disease. There is an ongoing need for a highly sensitive detection system. In addition to the methods, stable complexes and kits comprising the components necessary to perform the disclosed detection methods are described.