Profluorescent Nitroxide Probe Lipid Peroxidation Detection

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Solution Overview

Problem

Current methods for detecting lipid peroxidation inhibition are cumbersome and unable to efficiently measure samples with different absorption wavelengths, making it difficult to find effective therapeutic drugs for diseases caused by lipid peroxidation reactions, such as age-related macular degeneration.

Innovation Solution

The development of assay methods and kits using profluorescent nitroxide probe compounds that can detect lipid peroxidation inhibition, allowing for the screening of candidate compounds with lipid peroxidation inhibitory activity and their potential use in treating lipid peroxidation reaction-induced diseases.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional screening methods (TBARs method) are used to measure lipid peroxidation reaction inhibition, then a wide range of objects can be measured, but the measurement precision is poor and the device complexity increases due to pH manipulation and heating procedures

Engineering Contradiction:

Improverange of objects to be measuredVSAvoidmeasurement precision

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent replaces complex mechanical and chemical manipulation procedures (pH manipulation, heating) with a fluorescence-based detection system using profluorescent nitroxide probe compounds. This substitution maintains the ability to measure various lipid peroxidation objects while significantly improving measurement precision through direct fluorescence signal detection without requiring complex procedural manipulations

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the detection parameter from indirect chemical measurements (TBARs requiring pH and temperature manipulation) to direct fluorescence intensity measurement. This parameter change enables precise quantification of lipid peroxidation inhibition across different samples while simplifying the measurement process and improving adaptability to various absorption wavelengths

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If conventional screening methods are used, then various lipid peroxides can be measured, but the device complexity and procedure complexity increase due to pH manipulation and heating

Engineering Contradiction:

Improveability to measure various lipid peroxidesVSAvoidprocedure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical procedures (pH manipulation, heating steps) with a fluorescence detection system using profluorescent nitroxide probe compounds. This substitution maintains versatility in measuring various lipid peroxides while dramatically reducing procedure complexity to a simple incubation and measurement process

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces profluorescent nitroxide probe compounds as intermediaries that directly detect lipid radicals through fluorescence. This intermediary approach enables measurement of various lipid peroxides without requiring complex procedural steps, as the probe compounds specifically react with lipid radicals to produce measurable fluorescence signals

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If conventional methods are used for detecting lipid peroxidation, then measurements can be performed, but the loss of time increases due to complex procedures requiring pH manipulation and heating

Engineering Contradiction:

Improvedetection capabilityVSAvoidtime for complex procedures

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent replaces time-consuming mechanical procedures (pH manipulation, heating, multiple processing steps) with a rapid fluorescence detection method using profluorescent nitroxide probe compounds. This substitution maintains reliable detection capability while reducing the total procedure time significantly, as the method requires only simple incubation followed by direct fluorescence measurement

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

These assay methods and kits enable the easy identification of compounds with lipid peroxidation inhibitory effects, which are useful for treating diseases such as age-related macular degeneration, by providing a simple and effective means of detection.

Implementation Method 1

excellent profluorescent nitroxide probe compounds capable of capturing lipid radicals

Methodology Applied

Scientific EffectFluorescence: Fluorescence

Data Source

PatentUS12306164B2Therapeutic drug for lipid-peroxidation-induced diseases and screening method for therapeutic drugs for lipid-peroxidation-induced diseases

Publication Date: 2025.05.20 FUSO PHARMACEUTICAL INDUSTRIES LTD

AI summary

The present invention provides: an assay method that uses a compound represented by formula (I) as a fluorescent probe molecule and that is for detecting the lipid peroxidation suppression activity of a test compound; an assay kit that uses the assay method; a screening method that uses the assay method; and a pharmaceutical composition that is for the treatment, etc. of diseases (such as age-related macular degeneration) that are induced by lipid peroxidation reactions.