3D Hydrogel Microchip for IgE and IgG Quantification
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Solution Overview
Problem
Current allergen test microchips face limitations in providing accurate, quantitative determination of allergen-specific immunoglobulins E and G, often resulting in low sensitivity and high costs, with two-dimensional microchips experiencing protein denaturation and reduced active protein concentrations, and existing methods failing to offer precise diagnostic capabilities for allergies.
Innovation Solution
A three-dimensional hydrogel-based biological microchip with immobilized allergens and immunoglobulins, allowing for simultaneous quantitative determination of total and specific IgE and IgG in biological fluids, using a microchip array with elements containing immobilized allergens, anti-IgE, and anti-IgG antibodies, and internal calibration curves for precise concentration calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If two-dimensional microchips are used for allergen testing, then device complexity is reduced, but manufacturing precision deteriorates due to protein denaturation and reduced active protein concentrations
Solution Approach 1:
The patent transitions from two-dimensional surface immobilization to three-dimensional hydrogel matrix immobilization. Allergens are embedded within the porous hydrogel structure, providing spatial distribution in three dimensions rather than confined to a surface plane. This dimensional change increases the effective concentration of active allergens while preventing denaturation through the protective hydrogel environment.
Solution Approach 2:
The patent employs hydrogel materials with porous structures that allow allergens to be immobilized within the three-dimensional network. The porous nature of the hydrogel provides channels for antibody diffusion while maintaining high local concentrations of active allergens. This porous architecture prevents protein denaturation by providing a hydrated, biocompatible environment that mimics natural physiological conditions.
2Productivity
If multiple allergens are tested simultaneously, then productivity increases, but measurement precision deteriorates due to cross-reactivity and interference
Solution Approach 1:
The patent divides the testing system into multiple discrete microchips, each dedicated to detecting specific allergens or allergen groups. This segmentation allows simultaneous testing of multiple allergens while maintaining high precision for each individual detection. Each microchip contains a specific array of allergens immobilized in hydrogel elements, creating isolated detection zones that prevent cross-reactivity interference.
Solution Approach 2:
The patent implements local quality by optimizing the hydrogel composition and allergen concentration in each microchip according to the specific detection requirements. Different regions of the microchip array can have tailored properties - such as varying hydrogel crosslinking densities or allergen concentrations - to maximize sensitivity and specificity for particular allergens while minimizing cross-reactivity with others.
3Ease of operation
If conventional immunoassay methods are used, then ease of operation is maintained, but measurement precision deteriorates due to low sensitivity in quantitative determination
Solution Approach 1:
The patent introduces hydrogel elements as an intermediary medium between the allergens and the detection system. These hydrogel-based microchips serve as a bridge that maintains the simplicity of conventional immunoassay procedures while dramatically improving measurement precision. The hydrogel matrix enhances antigen-antibody interaction efficiency and provides a stable platform for quantitative determination, achieving sensitivities up to 100 times greater than conventional methods without complicating the overall assay procedure.
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 microchip solution enhances sensitivity and accuracy, enabling reliable quantitative analysis of multiple allergen-specific immunoglobulins in a single assay, improving diagnostic capabilities and reducing costs, while maintaining biological activity of immobilized ligands.
Implementation Method 1
containing covalently bound ligands
Implementation Method 2
simultaneous quantitative determination of total and specific IgE and IgG in biological fluids
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
The invention relates to biochemistry and medicine, more specifically to analytical biochemistry and immunochemical assay, and concerns a hydrogel-based biological microchip for the simultaneous quantitative determination of allergen-specific and total immunoglobulins E and/or immunoglobulins G in biological fluids. The microchip comprises elements with various allergens immobilized therein which are capable of causing allergic reactions in humans involving immunoglobulins E and G, and optionally, in need thereof, elements with anti-human immunoglobulin E antibodies and/or anti-human immunoglobulin G antibodies immobilized therein, and elements with human immunoglobulins E and/or G immobilized therein. The invention also relates to a method for carrying out simultaneous quantitative assay of immunoglobulins E and immunoglobulins G on the biological microchip, and to a reagent kit comprising said biological microchip. The invention also provides the construction of calibration curves to determine concentrations of various immunoglobulins directly on the microchip using microchip elements containing immobilized immunoglobulins. The invention may appear useful in diagnosing and monitoring the treatment of various types of allergies that involve immunoglobulins E and G.