Hydrogel Particles Tuning Optical Scattering for Flow Cytometry Calibration
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Solution Overview
Problem
Flow cytometry calibration requires purified cell lines, which are costly, labor-intensive, and prone to batch-to-batch variation, limiting the accuracy of instrument calibration and introducing biological noise in data interpretation due to the limitations of polystyrene beads in mimicking the optical properties of eukaryotic cells.
Innovation Solution
Hydrogel particles with tunable optical properties are developed to mimic specific cell types, allowing for precise calibration of cytometric devices by matching the optical properties of target cells, including forward and side scattering, enabling accurate calibration without the need for purified cell lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If purified cell lines are used for flow cytometry calibration, then calibration accuracy is improved, but cost and labor intensity increase significantly
Solution Approach 1:
The patent creates synthetic hydrogel particles that copy the optical scattering properties of real cells without requiring actual biological material. These particles replicate the forward scatter and side scatter characteristics of target cells through controlled composition and size, providing a synthetic alternative to purified cell lines for calibration purposes
Solution Approach 2:
The patent systematically varies parameters such as particle size, composition, and internal structure of hydrogel particles to match the optical properties of different cell types. By adjusting these parameters, the calibration particles can be optimized to replicate specific cell characteristics without the cost and variability of biological samples
2Measurement precision
If purified cell lines are used for calibration, then calibration accuracy is improved, but batch-to-batch variation increases
Solution Approach 1:
Synthetic hydrogel particles provide a consistent, non-biological template that can be manufactured with high precision and repeatability. Unlike purified cell lines which vary between batches, the synthetic particles maintain identical optical properties across production batches, eliminating biological variability
Solution Approach 2:
The patent uses controlled synthesis methods where parameters such as monomer concentration, crosslinking density, and particle size are precisely regulated to ensure batch-to-batch consistency. This systematic parameter control produces calibration particles with reproducible optical scattering properties
3Ease of manufacture
If polystyrene beads are used as calibration particles, then ease of manufacture is improved, but ability to mimic eukaryotic cell optical properties deteriorates
Solution Approach 1:
The patent uses hydrogel composite materials that combine the ease of synthetic manufacturing with the ability to mimic biological optical properties. The hydrogel matrix can be formulated with specific refractive indices and internal structures that replicate cell scattering characteristics, overcoming the limitations of simple polystyrene beads
Solution Approach 2:
The patent systematically adjusts hydrogel composition parameters including polymer type, crosslinking density, and internal porosity to match the optical scattering properties of eukaryotic cells. These parameter adjustments enable the particles to replicate both forward and side scatter characteristics that polystyrene beads cannot achieve
4Adaptability or versatility
If synthetic compositions with tunable optical properties are developed, then adaptability to different cell types is improved, but device complexity increases
Solution Approach 1:
The patent employs systematic parameter adjustment of hydrogel composition (monomer type, concentration, crosslinking) and physical properties (size, shape, internal structure) to match the optical characteristics of different cell types. This parameter-based approach provides versatility while maintaining a relatively simple synthesis methodology
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 a cost-effective and efficient means to calibrate flow cytometers, reducing biological noise and improving the accuracy of cell type identification and analysis by mimicking the optical properties of target cells, thus enhancing the reliability of flow cytometry results.
Implementation Method 1
The technology relies on directing a beam of light onto a hydrodynamically-focused stream of liquid. A number of detectors are then aimed at the point where the stream passes through the light beam: one in line with the light beam (Forward Scatter or FSC) and several perpendicular to it (Side Scatter or SSC).
Data Source
AI summary
The present disclosure relates to compositions comprising a hydrogel particle with optical properties substantially similar to the optical properties of a target cell, and methods for their use.