Water-Soluble Fluorescence Enhancer for Dye Self-Association Control
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Solution Overview
Problem
Existing fluorescence imaging techniques face challenges in maintaining fluorescence intensity due to self-association of organic fluorescent dyes, leading to a decrease in brightness, particularly when multiple dye molecules are bonded to a biomolecule.
Innovation Solution
The use of a water-soluble compound with a melting point of 50°C or higher, such as mannitol, sucrose, or trehalose, to suppress self-association and enhance fluorescence intensity in fluorescently labeled biological substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple organic fluorescent dye molecules are bonded to one biomolecule to increase brightness, then the initial fluorescence intensity increases, but self-association between dyes occurs leading to decreased fluorescence intensity
Solution Approach 1:
The patent introduces a water-soluble compound with a melting point of 50°C or higher (such as mannitol, sucrose, or trehalose) as an intermediary substance. This compound is bonded to the biomolecule alongside the fluorescent dyes and functions to suppress self-association between dye molecules through steric hindrance and molecular spacing, thereby maintaining fluorescence intensity while allowing multiple dyes to be attached to enhance brightness.
2Illumination intensity
If the degree of fluorescence labeling (number of dye molecules per biomolecule) is increased to enhance brightness, then more light can be emitted, but self-association and quenching effects increase leading to further decrease in fluorescence intensity
Solution Approach 1:
The water-soluble compound acts as a spacer molecule positioned between adjacent fluorescent dye molecules on the biomolecule. This intermediary structure physically separates the dyes, preventing π-π stacking and other self-association interactions that cause quenching, thereby enabling higher labeling densities without the corresponding increase in harmful self-association effects.
Solution Approach 2:
The patent changes the physical and chemical parameters of the labeling system by selecting water-soluble compounds with specific properties (melting point ≥50°C, water solubility). These parameter changes ensure the compound remains stable in aqueous environments and effectively maintains optimal spacing between dyes, preventing quenching while allowing high labeling degrees for enhanced brightness.
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 proposed solution effectively enhances fluorescence intensity by interposing the water-soluble compound between dye molecules, preventing quenching and maintaining brightness, even in dried samples.
Implementation Method 1
a water-soluble compound having a melting point of 50° C. or higher suppresses self-association between fluorescent dyes in a fluorescent dye-labeled biomolecule
Data Source
AI summary
A fluorescence intensity enhancer containing a water-soluble compound having a melting point of 50° C. or higher, a fluorescence intensity enhancing method of a fluorescently labeled target biological substance using the fluorescence intensity enhancer, and a kit for fluorescence detection containing the fluorescence intensity enhancer.