Histamine Detection Polypeptides via Modified Immunogen Linkers
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Solution Overview
Problem
Current methods for detecting histamine suffer from low analytical sensitivity and complex sample processing, particularly for free histamine, due to the limitations of antibody-based diagnostic methods that recognize protein-bound histamine with limited affinity and sensitivity.
Innovation Solution
Development of novel polypeptides with specific variable heavy and light chain domains that enhance binding to free histamine and histidine, allowing for improved detection in test samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If antibody-based diagnostic methods are used to detect histamine, then detection capability is provided, but analytical sensitivity and affinity for free histamine are limited
Solution Approach 1:
The patent modifies the immunogen structure by using small molecule haptens (free histamine or histidine) coupled to carrier proteins through multiple different chemical linkers and at various positions, rather than using conventional protein-bound histamine. This parameter change in the immunogen structure enables the generation of antibodies with high affinity and sensitivity for free histamine, resolving the contradiction between measurement precision and reliability.
Solution Approach 2:
The patent performs preliminary conjugation of histamine to carrier proteins using multiple different chemical linkers and coupling positions before immunization. This preliminary action creates a diverse library of immunogens that pre-program the immune system to recognize free histamine in various forms, thereby improving both analytical sensitivity and affinity for free histamine detection.
2Reliability
If conventional immunization methods with protein-bound histamine are used, then antibody production is achieved, but the antibodies recognize only protein-bound histamine with limited affinity
Solution Approach 1:
Instead of conjugating histamine to protein and expecting antibodies to recognize free histamine (conventional approach), the patent inverts the approach by using small molecule haptens coupled to carriers through multiple different linkers to generate antibodies that specifically recognize free histamine. This inversion of the conventional immunization strategy resolves the contradiction between antibody recognition capability and affinity for free histamine.
3Measurement precision
If chromatography-based methods are used for histamine detection, then analytical determination is achieved, but cost, analysis time, and portability are compromised
Solution Approach 1:
The patent extracts the detection capability from complex chromatography systems and concentrates it into a simplified antibody-based immunoassay format. By using highly specific antibodies generated through the novel immunization method, the patent eliminates the need for complex chromatography instrumentation, thereby reducing analysis time and enabling portability while maintaining analytical determination capability.
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 novel polypeptides provide enhanced sensitivity and specificity for detecting free histamine and histidine, addressing the limitations of existing methods and enabling more effective medical diagnostics and food safety applications.
Implementation Method 1
novel polypeptides with specific variable heavy and light chain domains that enhance binding to free histamine and histidine
Data Source
AI summary
Described herein are polypeptides, compositions, kits, and analyte detection systems for the detection of the presence or absence of small molecules (e.g. histamine and/or histidine) in a test sample.