Double Fluorescent Particles for Ratiometric Cell Staining
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Solution Overview
Problem
Current fluorescence-based detection methods for cells, particularly in cell biology and medical diagnostics, face challenges with single-signal systems that are affected by concentration changes, inhomogeneous distributions, and environmental conditions, leading to unreliable quantitative determinations in complex samples.
Innovation Solution
A double fluorescent particle system is introduced, comprising a core with a first fluorescence and a molecularly imprinted polymer (MIP) shell with a second fluorescence, where the MIP is adapted to selectively bind to cell surface structures, allowing for ratiometric dual-signal measurements that are independent of sensor and reagent concentrations, and environmental fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If single-signal fluorescence systems are used for cell detection, then the device complexity is low, but the measurement precision deteriorates due to concentration changes and environmental fluctuations
Solution Approach 1:
The fluorescence detection system is segmented into two independent fluorescent components: a first fluorescence source (e.g., quantum dots) and a second fluorescence source (e.g., fluorescent dye in MIP shell). Each component emits at different wavelengths, allowing separate detection channels that can be independently optimized for stability and sensitivity, thereby improving measurement precision without excessive complexity increase
Solution Approach 2:
The patent implements a nested structure where the MIP shell containing the second fluorescent dye encapsulates the first fluorescent core. This nested doll configuration allows both fluorescent signals to be generated from a single particle structure, providing ratiometric measurement capability while maintaining reasonable device complexity through integrated design
2Reliability
If single-signal fluorescence systems are used, then the manufacturing process is simple, but the reliability deteriorates due to inhomogeneous sensor distribution and instrumental fluctuations
Solution Approach 1:
The molecularly imprinted polymer shell automatically performs multiple functions: it provides the second fluorescent signal, enables ratiometric measurement for instrumental fluctuation correction, and offers selective binding to target cells. This self-service capability improves detection reliability while the established MIP synthesis protocols keep manufacturing complexity manageable
Solution Approach 2:
The patent utilizes parameter changes in fluorescence emission wavelengths between the two components to achieve ratiometric measurement. By selecting fluorescent materials with distinct spectral properties, the system can correct for instrumental fluctuations and distribution inhomogeneities, improving reliability while maintaining ease of manufacture through spectral parameter optimization
3Measurement precision
If conventional fluorescent staining is used, then the procedure is simple, but the measurement precision deteriorates in complex samples due to background interference
Solution Approach 1:
The molecularly imprinted polymer shell provides localized recognition capability with high specificity for target cell surface structures. This local quality of selective binding concentrates the fluorescent signal at the target site while minimizing background interference, improving measurement precision in complex samples
Solution Approach 2:
The patent creates a composite fluorescent particle combining inorganic/organic materials with different fluorescent properties. The first fluorescence core (e.g., quantum dots) provides stable reference signal while the MIP shell with second fluorescent dye provides target-specific signal, creating a composite material that enhances signal-to-background ratio through material property optimization
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 approach enhances the reliability and accuracy of cell detection by providing an intrinsic correction mechanism, enabling unequivocal identification of target cells with improved sensitivity and specificity, particularly in complex samples and tissues.
Implementation Method 1
a core having a first fluorescence; and a molecularly imprinted polymer (MIP) shell having a second fluorescence, wherein the first and second fluorescence differ at least by an emission wavelength and/or by an excitation wavelength
Data Source
AI summary
A double fluorescent particle comprises: a core with a first fluorescence; and a molecularly imprinted polymer (MIP) shell with a second fluorescence; wherein the MIP is an organic polymer comprising elements selected from the group consisting of: C, H, O, N, P, and S; wherein the MIP is adapted to selectively bind to a cell surface structure; wherein the first fluorescence is generated by an entity selected from the group consisting of: a carbon nanodot, an alkaline earth metal fluoride, a dye-doped polymer, a dye-doped stabilized micelle, a P-dot—i.e. a π-conjugated polymer, a quantum dot doped polymer, a rare earth metal ion doped polymer, a dye-doped silica, a rare-earth ion doped silica, and a rare earth ion doped alkaline earth metal fluoride nanoparticle; wherein the second fluorescence is generated by an entity selected from the group consisting of: a dye, a molecular probe, an indicator, a probe monomer, an indicator monomer, and a cross-linker, and wherein the first and second fluorescence differ at least by an emission wavelength and/or by an excitation wavelength.