Fluorescent Dyes for Extracellular Vesicle Labeling
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Solution Overview
Problem
Current methods for detecting and tracking extracellular vesicles (EVs) are not sufficiently simple, inexpensive, or effective using conventional instrumentation, hindering the understanding of their biological functions and clinical applications.
Innovation Solution
Development of fluorescent dyes that can label EVs and cells, allowing for their detection and tracking using suitable instrumentation by associating with the lipid bilayer, enabling easy visualization through fluorescence emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional methods for detecting EVs are used, then detection capability is achieved, but the methods are complex, expensive, and require specialized instrumentation
Solution Approach 1:
The patent applies fluorescent dyes that emit light at specific wavelengths when excited, enabling EVs to be visualized and detected using conventional fluorescence microscopy and flow cytometry. The dyes undergo photophysical changes (absorption and emission of light) that provide strong contrast against biological backgrounds, simplifying detection without requiring specialized instrumentation.
Solution Approach 2:
The fluorescent dyes act as intermediary agents that transfer the detection signal from EVs to the detection instrument. The dyes bind to EV membranes and serve as visible proxies, allowing conventional instruments to detect EVs through fluorescent signal rather than requiring direct visualization of the vesicles themselves.
2Ease of manufacture
If conventional detection methods are used, then EV detection is possible, but the methods are expensive and not simple
Solution Approach 1:
The patent employs inexpensive fluorescent dyes that can be easily synthesized and applied to EVs. These dyes serve as disposable labeling agents that provide effective detection without requiring expensive reagents or specialized consumables, making the detection method economically viable for routine use.
Solution Approach 2:
The invention modifies the optical parameters of EVs by introducing fluorescent dyes with specific absorption and emission wavelengths. This parameter change enables detection using standard fluorescence instrumentation rather than requiring specialized equipment, thereby reducing costs while maintaining detection capability.
3Ease of operation
If fluorescent dyes are used to label EVs, then detection and tracking become easy and inexpensive, but the dyes must be specifically designed to associate with lipid bilayers
Solution Approach 1:
The fluorescent dyes are designed with specific molecular structures that provide local hydrophobic regions for interaction with lipid bilayers and hydrophilic regions for solubility in aqueous environments. This local quality differentiation enables the dyes to selectively associate with EV membranes while maintaining compatibility with the cellular environment, simplifying the labeling process.
Solution Approach 2:
The patent employs composite dye structures combining fluorescent chromophores with lipid-interacting moieties. These composite molecules integrate multiple functions (fluorescence emission, membrane association, and solubility) into a single agent, enabling effective EV labeling without requiring complex multi-step protocols or multiple reagents.
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 fluorescent dyes effectively label EVs and cells, enabling their detection and tracking with conventional instrumentation, which enhances the understanding of EV functions and potential clinical applications.
Implementation Method 1
The present invention relates to fluorescent dyes of formula (I)... capable of labelling EVs... allowing EVs labelled with the dyes to be detected and tracked
Data Source
AI summary
The present invention relates to fluorescent dyes of formula (I), including salts thereof, and extracellular vesicles and cells labelled with the fluorescent dyes. The present invention also relates to methods, uses and kits thereof.