Hydrogel Bead Cell Mimics for Flow Cytometry Viability Controls
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Solution Overview
Problem
Existing flow cytometry methods rely on purified live and dead cells for calibration, which are wasteful, time-consuming, and prone to batch variations, and lack standardized controls for accurately distinguishing between live, dead, and apoptotic cells.
Innovation Solution
Hydrogel beads composed of polymerized monomers and bifunctional monomers, optionally with pre-apoptotic signal binders and encapsulated nucleic acids, are used to mimic live, dead, and apoptotic cells, providing stable and standardized controls for flow cytometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If purified cells are used for calibration controls, then measurement precision is improved, but loss of time and loss of substance increase
Solution Approach 1:
The patent creates synthetic bead mimics that replicate the optical and physical characteristics of live, dead, and apoptotic cells without using actual cells. These beads copy the scattering properties, size, and surface characteristics of cells, providing calibration controls that eliminate the need for time-consuming cell purification and preparation while maintaining measurement accuracy.
Solution Approach 2:
The patent employs commercially available fluorescent beads that can be easily obtained and disposed of, replacing the need for maintaining cell cultures and performing complex purification procedures. These beads are stable, reproducible, and do not require the time and resources needed to prepare purified cell populations.
2Measurement precision
If heat or chemical methods are used to obtain purified cells, then measurement precision is improved, but loss of substance increases
Solution Approach 1:
Instead of using actual cells that require destructive purification methods, the patent creates synthetic bead copies that mimic cell characteristics. These beads replicate the optical properties and physical dimensions of live, dead, and apoptotic cells without requiring heat treatment or chemical processing that would destroy biological material.
Solution Approach 2:
The patent replaces expensive and wasteful cell purification processes with inexpensive, readily available fluorescent beads. These beads eliminate the need for consumable cell materials and the associated waste from heat and chemical treatment, significantly reducing substance loss.
3Manufacturing precision
If cell purification processes are standardized, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent uses synthetic beads with standardized optical and physical properties that can be manufactured with high precision without complex purification steps. The beads are designed to replicate specific cell characteristics (live, dead, apoptotic) through controlled fluorescent labeling and size adjustment, providing consistency without requiring complex biological processing.
Solution Approach 2:
The patent adjusts bead parameters such as size, fluorescent intensity, and scattering properties to match specific cell states. By controlling these physical and optical parameters during bead manufacturing, the patent achieves standardized controls without needing to replicate complex cell purification procedures.
4Measurement precision
If purified cells are used for calibration, then measurement precision is improved, but productivity decreases
Solution Approach 1:
The patent replaces time-consuming cell purification and preparation processes with ready-to-use fluorescent bead mimics. These beads are pre-prepared and can be directly applied to flow cytometry samples, eliminating the time required for cell harvesting, purification, and viability staining while maintaining assay accuracy.
Solution Approach 2:
The patent performs all necessary calibration preparations in advance by manufacturing beads with predetermined optical and physical characteristics. This preliminary preparation eliminates the need for time-consuming in-lab cell purification processes, allowing users to simply add beads to their samples for immediate calibration.
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 beads offer precise control over live, dead, and apoptotic cell mimics, reducing variability and time, and enabling accurate differentiation and quantification of cell populations in flow cytometry.
Implementation Method 1
a polymerized monomer and a bifunctional monomer
Data Source
AI summary
Provided herein are hydrogel beads that mimic live, dead, and apoptotic cells. The present disclosure also provides kits and compositions of hydrogel beads. The present disclosure further comprises methods of using the kits, compositions, and hydrogel beads to determine if a target cell sample includes one or more live, dead, or apoptotic cells.