TCPP Modified Beads for Flow Cytometry Compensation
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Solution Overview
Problem
Current flow cytometry lacks a commercial source for TCPP conjugated beads necessary for compensation when detecting TCPP labeled cancer cells, leading to challenges in calibration and fluorescence interference due to the absence of standards with TCPP, which affects the accuracy and reproducibility of results.
Innovation Solution
Development of bead compositions modified with TCPP, specifically amine functionalized beads with diameters between 5 μm to 20 μm, covalently or non-covalently bonded with TCPP, designed for use in flow cytometry compensation, providing stable fluorescence and reducing particulates through filtration processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If TCPP labeled cells are analyzed in flow cytometry, then cancer cell detection is achieved, but compensation standards are unavailable leading to inaccurate results
Solution Approach 1:
The patent creates artificial bead copies that replicate the fluorescence properties of TCPP labeled cells. These beads are engineered to exhibit identical spectral characteristics and fluorescence intensity ranges as actual TCPP labeled cancer cells, providing a reliable substitute for compensation standards without requiring actual patient samples.
Solution Approach 2:
The patent modifies bead parameters (size, fluorescence intensity, spectral properties) to match the characteristics of TCPP labeled cells. By adjusting these parameters, the beads serve as accurate compensation standards that enable proper instrument calibration and data interpretation.
2Illumination intensity
If TCPP is used for cell labeling, then fluorescence detection is enabled, but fluorescence spillover interference occurs in multiple channels
Solution Approach 1:
The patent introduces TCPP-labeled beads as an intermediary substance that mediates the measurement process. These beads allow indirect assessment of fluorescence spillover by providing known reference signals, enabling mathematical compensation calculations that remove interference effects from actual cell measurements.
Solution Approach 2:
The patent employs feedback through compensation calculations that use data from TCPP-labeled beads to correct measurements. The instrument measures fluorescence in multiple channels using the beads, calculates spillover coefficients, and applies mathematical corrections to subsequent cell measurements, creating a closed-loop system that eliminates interference.
3Productivity
If flow cytometry calibration is performed without TCPP standards, then instrument operation continues, but alignment and compensation cannot be optimized
Solution Approach 1:
The patent implements preliminary calibration action by providing TCPP-labeled beads that can be used before actual sample analysis. These beads enable pre-adjustment of instrument settings, optimization of detection parameters, and verification of system performance, ensuring the instrument is properly calibrated before clinical or research measurements begin.
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 TCPP modified beads enable accurate and reproducible flow cytometry results by providing a standard for compensation, reducing fluorescence interference, and maintaining stability for over six months, thus enhancing the diagnostic capability for cancer cells.
Implementation Method 1
Porphyrins also exhibit strong fluorescence, that is, the absorption of light of a given wavelength and subsequent emission of light at a longer wavelength, a phenomenon known as the Stokes shift.
Implementation Method 2
Flow cytometers are instruments which analyze biological cells and particles in a thin stream of fluid intersected by an illumination source, usually a laser beam, with the resulting forward scatter (FSC) and side scatter (SSC) and fluorescent light, emitted by fluorophores on the cells or particles being analyzed
Data Source
AI summary
A compensation bead comprising an amine functionalized bead modified covalently or non-covalently with a carboxyaryl porphyrin, a method for making the amine functionalized bead with the carboxyaryl porphyrin and a method of using the amine functionalized bead with the carboxyaryl porphyrin as a marker for the carboxyaryl porphyrin labeled cells and particles.