Oxidation-Sensitive Fluorometry for Granulocyte Allergen Responses

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Solution Overview

Problem

Current methods lack effective and precise ways to detect or predict immune reactions to exogenous stimulants such as environmental, foodstuff, and medicament allergens, particularly in terms of reaction type and severity, using fluorometric measurements.

Innovation Solution

The use of oxidation-sensitive fluorophores, such as dihydrorhodamine (DHR 123), in combination with flow cytometry and binding moieties, to measure the activation of granulocytes (neutrophils, eosinophils, and basophils) by detecting the oxidation of these fluorophores after exposure to exogenous stimulants, allowing for the identification of immune reactions and compatibility through fluorometric measurement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If fluorometric measurement methods are used to detect immune reactions to exogenous stimulants, then measurement precision is improved, but the ability to specifically identify immune reaction type and severity is insufficient

Engineering Contradiction:

Improvefluorometric measurement precisionVSAvoidimmune reaction type and severity information

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The patent segments the immune response detection by targeting specific granulocyte populations (neutrophils, eosinophils, basophils) separately using specific binding moieties for each cell type. This segmentation allows the measurement of distinct immune reaction types and their severities through fluorometric detection of oxidative activity in each population, thereby preserving detailed immune response information while maintaining measurement precision.

Inventive Principle:

Principle #1Segmentation

2Device complexity

If conventional detection methods are used for immune reactions, then device complexity is reduced, but measurement precision and reliability are insufficient

Engineering Contradiction:

Improvedetection method complexityVSAvoidimmune reaction detection precision

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent introduces binding moieties as intermediary molecules that specifically bind to surface markers on different granulocyte populations. These binding moieties serve as mediators between the exogenous stimulants and the fluorometric detection system, enabling precise identification of which specific granulocyte populations are activated. This intermediary approach enhances measurement precision without requiring overly complex instrumentation, as the specificity is achieved through molecular recognition rather than instrumental complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Measurement precision

If fluorometric measurement of granulocyte oxidation is used, then immune reaction detection precision is improved, but the method's ability to predict compatibility with exogenous stimulants is insufficient

Engineering Contradiction:

Improveimmune reaction detection precisionVSAvoidcompatibility prediction reliability

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent employs a feedback mechanism by comparing the fluorometric signal intensity from test subjects against control signals obtained from known reactions. The system uses the measured oxidative activity levels of specific granulocyte populations as feedback to determine whether an immune reaction has occurred and to assess its severity. This feedback loop enables reliable prediction of compatibility with exogenous stimulants by establishing reference ranges and comparing individual responses against these standards.

Inventive Principle:

Principle #23Feedback

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 method provides a precise and effective way to predict immune reactions and compatibility with exogenous stimulants by measuring the oxidation of fluorophores in granulocytes, enabling accurate detection and prediction of immune responses.

Implementation Method 1

an increase in intensity of fluorescence from an oxidized form of the oxidation-sensitive fluorophore as measured by flow cytometry after contact of the oxidation-sensitive fluorophore-treated granulocytes with the exogenous stimulant

Methodology Applied

Scientific EffectOxidation: Oxidation

Implementation Method 2

fluorometric measurement of the amount of oxidation-sensitive fluorophore-treated granulocytes in a biological sample from the subject after contact of the granulocytes with the exogenous stimulant ex vivo

Methodology Applied

Scientific EffectFluorescence: Fluorescence

Data Source

PatentUS20250327794A1Fluorometric methods for detection of allergic sensitivity to environmental, foodstuff, and medicament stimulants

Publication Date: 2025.10.23 CELL SCI SYST CORP

AI summary

The present disclosure relates, in part, to flow cytometric methods for detecting or measuring the response of a subject to an exogenous stimulant, such as environmental, foodstuff, and medicament allergens.