Hydrogel Calibration Particles for Accurate Flow Cytometry Compensation
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Solution Overview
Problem
Existing synthetic polymer particles, such as polystyrene, exhibit autofluorescence that interferes with accurate fluorescence calibration and compensation in flow cytometry, leading to poor detector resolution and inaccurate biomarker detection, especially in channels with violet and ultraviolet excitation or emission profiles.
Innovation Solution
Hydrogel particles are engineered to mimic the autofluorescence and spectral properties of target cells, allowing for precise calibration and compensation by modulating their fluorescent and spectral profiles independently of their optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If polystyrene particles are used as calibration substrates, then they provide stable optical properties and ease of manufacture, but they exhibit high autofluorescence that interferes with accurate fluorescence calibration and compensation
Solution Approach 1:
The patent changes the material parameter from polystyrene to hydrogel, which fundamentally alters the autofluorescence characteristics. Hydrogel particles exhibit autofluorescence levels and spectral profiles that closely match actual cells, eliminating the harmful interference problem while maintaining manufacturability through established hydrogel synthesis methods
Solution Approach 2:
The patent uses composite material construction by incorporating fluorophores into the hydrogel matrix, creating a multi-component system where the hydrogel provides the cellular-like autofluorescence background and the fluorophores provide the calibration signal, achieving both low interference and high functionality
2Stability of the object's composition
If polystyrene particles are used for fluorescence calibration, then they provide consistent forward and side scatter profiles, but they produce spurious FRET signals that reduce signal-to-noise ratio
Solution Approach 1:
The patent changes the material composition from polystyrene to hydrogel, which alters the fluorophore interaction characteristics. Hydrogel's water-based matrix prevents the close proximity required for spurious FRET, eliminating this harmful effect while maintaining stable optical properties through controlled hydrogel formulation
3Manufacturing precision
If polystyrene particles are used as calibration standards, then they provide fixed diameter-based scatter profiles, but they cannot accurately distinguish rare or low-expression biomarkers from background signal
Solution Approach 1:
The patent changes the material from polystyrene to hydrogel, which provides cellular-like autofluorescence characteristics. This enables accurate distinction between true low-expression biomarker signals and background autofluorescence, as the hydrogel background matches actual cell behavior rather than polystyrene's artificial profile
Solution Approach 2:
The patent creates calibration particles that copy the optical characteristics of actual cells, including autofluorescence levels and spectral profiles. This cellular mimicry allows the calibration standards to accurately represent the background signal that actual cells produce, enabling precise biomarker detection
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 hydrogel particles provide accurate fluorescence calibration and compensation, enabling better detection of rare biomarkers and reducing biological variation, thus improving the sensitivity and reliability of flow cytometry.
Implementation Method 1
hydrogel particles having at least one of an autofluorescent property or a spectral property that is substantially similar to the at least one of an autofluorescent property or a spectral property of the target cell
Data Source
AI summary
A method includes calibrating a cytometric device for analysis of a target cell, by inserting, into the cytometric device, a hydrogel particle. The hydrogel particle has at least one of a background fluorescent property or a spectral property that is substantially similar to the at least one of a background fluorescent property or a spectral property of the target cell. The method also includes measuring at least one property of the hydrogel particle using the cytometric device.