Polymeric-Enzyme Antibody Conjugates for Rapid Intraoperative IHC
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Solution Overview
Problem
Current immunohistochemistry (IHC) techniques are too time-consuming for intraoperative use and can produce artifacts, requiring 60 to 120 minutes for results, which is not suitable for rapid pathological analysis, and lack sensitivity and specificity for detecting proteins in tissue samples, especially in frozen and paraffin-embedded tissues.
Innovation Solution
The use of polymeric-enzyme/antibody conjugates that consist of multiple enzyme molecules and antibodies specific to target analytes, which form complexes with the analytes in tissue samples, allowing for rapid detection by contacting the tissue with a substrate to visualize the analytes, with methods including blocking steps and suitable incubation temperatures and times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard immunohistochemistry techniques are used, then specific proteins can be identified in tissue, but the process takes 60 to 120 minutes which is too long for intraoperative use
Solution Approach 1:
The patent segments the traditional multi-step IHC process by using a pre-formed polymeric-enzyme/antibody conjugate that combines antibody binding and enzyme activity in a single reagent, eliminating sequential steps and reducing total analysis time to 3 minutes while maintaining detection capability
Solution Approach 2:
The patent creates a composite polymeric-enzyme/antibody conjugate that integrates multiple functional components (polymer backbone, enzyme molecules, and antibody) into a single reagent system, enabling simultaneous antigen binding and catalytic signal generation, thus reducing time loss without compromising measurement precision
2Measurement precision
If signal amplification techniques such as secondary antibodies and biotin-avidin systems are used, then detection sensitivity is improved, but artifacts are introduced including non-specific binding and endogenous biotin interference
Solution Approach 1:
The patent extracts and eliminates the problematic secondary antibody and biotin-avidin amplification steps from the traditional IHC protocol, retaining only the essential primary antibody binding function while using a simplified polymeric-enzyme conjugate system that achieves detection without introducing non-specific binding or endogenous biotin artifacts
Solution Approach 2:
The patent converts the need for signal amplification into a benefit by incorporating multiple enzyme molecules directly onto the antibody conjugate, achieving sensitive detection through controlled enzymatic amplification without the harmful artifacts associated with traditional secondary antibody systems
3Measurement precision
If traditional IHC methods are used, then proteins can be detected, but the complexity of multiple steps and reagents makes the process cumbersome
Solution Approach 1:
The patent merges the antibody binding function and enzyme catalytic function into a single polymeric-enzyme/antibody conjugate reagent, combining multiple traditional steps (antibody incubation, washing, secondary antibody incubation, substrate addition) into a streamlined protocol that maintains detection precision while reducing procedural complexity
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
This approach enables rapid and sensitive detection of target analytes in tissue samples, reducing the time to obtain results to as little as 3 minutes, improving the specificity and reducing artifacts, making it suitable for both frozen and paraffin-embedded tissues, and facilitating intraoperative pathological analysis.
Implementation Method 1
contacting the tissue with a substrate of the plurality of enzyme molecules, thereby detecting the target analyte
Data Source
AI summary
The application is to antibodies which have been labelled with polyenzymes (multiple enzymes), specifically polyperoxidases, for use in direct immunohistochemical assays of tissues. The antibodies used diagnostically may also be antibodies which are used therapeutically.