Insulin Assay Buffer Composition for Nonspecific Reaction Suppression
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Solution Overview
Problem
Sandwich latex turbidimetric immunoassays for human insulin face issues with nonspecific reactions, particularly when compared to conventional chemiluminescent enzyme immunoassays, leading to deviations in measurement values.
Innovation Solution
Performing immunoreactions with anti-insulin antibody-immobilized particles in a buffer containing two or more amine compounds with pH buffering effects, such as HEPES, MES, and Tris, at concentrations between 100 mM to 1000 mM and pH 7.3 to 7.8 to suppress nonspecific reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sandwich LTIA is performed with conventional buffer, then the assay can be conducted, but nonspecific reaction occurs causing deviation from conventional method values
Solution Approach 1:
The patent changes the buffer composition parameters by incorporating two or more specific pH buffering agents (HEPES, MES, Tris) in specific concentrations (100-1000 mM total) and pH range (7.3-7.8), which suppresses nonspecific reaction and reduces deviation from conventional method values while maintaining the sandwich LTIA format
Solution Approach 2:
The patent uses a composite buffer system containing two or more different pH buffering agents working together, rather than a single buffering agent, to achieve both pH stability and suppression of nonsspecific reaction in the insulin assay
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 significantly reduces deviations in measurement values, effectively suppressing nonspecific reactions and improving the accuracy of human insulin latex agglutination immunoassays.
Implementation Method 1
human insulin latex agglutination immunoassay
Implementation Method 2
performing an immunoreaction with anti-insulin antibody-immobilized particles in a buffer containing two or more amine compounds having a pH buffering effect
Data Source
Figure 1
AI summary
Provided herein is a human insulin latex agglutination immunoassay and assay reagents with which nonspecific reaction in a blood sample assay can be suppressed. The assay performs an immunoreaction with anti-insulin antibody-immobilized particles in a buffer containing two or more amine compounds having a pH buffering effect.