Fluorescent SBB Analogues for Soluble Senescent Cell Imaging
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Solution Overview
Problem
Existing senescence detection methods, such as SA-β-gal and traditional Sudan Black B (SBB) staining, face challenges with solubility issues and require complex immunohistochemical steps, limiting their broad application in detecting senescent cells.
Innovation Solution
Development of water-soluble SBB analogues linked to a fluorescent dye moiety for direct visualization and isolation of senescent cells through methods like histochemical staining, flow-cytometry, and fluorescence-activated cell sorting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional Sudan Black B (SBB) staining is used for senescent cell detection, then detection capability is achieved, but solubility issues and complex immunohistochemical steps are required
Solution Approach 1:
The patent segments the detection process by using a fluorescent dye-conjugated SBB analogue that directly binds to lipofuscin in senescent cells, eliminating the need for complex immunohistochemical steps. The fluorescent tag enables direct visualization without additional processing steps.
Solution Approach 2:
The fluorescent dye acts as an intermediary that conjugates to the SBB analogue, enabling direct detection of lipofuscin-containing senescent cells through fluorescence microscopy or flow cytometry, thereby replacing complex immunohistochemical procedures.
2Reliability
If traditional SBB staining is used, then senescent cells can be detected, but solubility in aqueous media is poor
Solution Approach 1:
The patent modifies the chemical parameters of SBB by conjugating it to water-soluble fluorescent dyes, thereby improving its solubility in aqueous media while maintaining its ability to bind lipofuscin in senescent cells.
Solution Approach 2:
The patent creates a composite material by conjugating SBB with fluorescent dye moieties, combining the lipofuscin-binding capability of SBB with the water solubility and fluorescent properties of the dye, achieving both detection capability and improved solubility.
3Quantity of substance
If fluorescent dye-conjugated SBB analogues are used, then solubility in aqueous media improves, but detection sensitivity must be maintained
Solution Approach 1:
The patent optimizes the fluorescent dye selection and conjugation parameters to ensure that the SBB analogue maintains high affinity for lipofuscin while achieving adequate solubility in aqueous media, thereby preserving detection sensitivity.
Solution Approach 2:
The patent utilizes fluorescent dyes that emit specific wavelengths of light upon excitation, enabling sensitive detection of senescent cells through fluorescence microscopy or flow cytometry, with the fluorescent signal providing high contrast and detection sensitivity.
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 new compounds provide high solubility in aqueous media, enabling sensitive and specific detection and isolation of senescent cells in various biological samples, including fresh and preserved states, with improved efficiency and reduced complexity.
Implementation Method 1
compounds comprising SSB analogues linked to a fluorescent dye moiety (fluorophore) which allow for the visualization of senescent cells
Implementation Method 2
The compounds have the ability to react with lipofuscin, in an analogous manner to the histochemical dye SBB
Data Source
AI summary
A compound, or a salt or solvate thereof, according to formula I as defined herein and pharmaceutical composition comprising said compound. Compounds of formula I are capable of detecting senescence. As such, these compounds are useful in methods of detecting or imaging senescent cells or extracts thereof or senescence in a subject or a biological sample taken from a subject.