Selective Cell Release via Localized Physical Pulse
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Solution Overview
Problem
Current methods for isolating single cells or particles from heterogeneous populations are inefficient and often damage cells, particularly adherent cells, due to the need for enzymatic or mechanical release, which is detrimental to cell health and not suitable for downstream analysis.
Innovation Solution
A method involving binding biological units to an entity via a linker, determining their location, and applying a localized physical pulse to individually release specific members of a sub-group without damaging the cells, using photocleavable or thermally cleavable linkers to dissociate and harvest cells with high precision and integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If enzymatic or mechanical release methods are used to separate adherent cells from growth surface, then cell separation is achieved, but cell health and integrity are damaged
Solution Approach 1:
The patent introduces an intermediary substance (extracellular matrix coating such as collagen, fibronectin, or laminin) that mediates the attachment of adherent cells to the growth surface. This intermediary layer allows cells to be released by detaching from the matrix rather than directly from the surface, enabling gentle release without enzymatic or mechanical damage to cell structures
Solution Approach 2:
The patent replaces mechanical scraping or enzymatic digestion methods with a controlled release mechanism based on reversible binding interactions between the extracellular matrix and cells. The release is achieved through controlled degradation or detachment of the matrix layer, substituting harsh mechanical/enzymatic forces with a more gentle biochemical release process
2Ease of operation
If traditional sorting methods are used for non-hematopoietic cells, then cell separation is possible, but the protocol complexity increases significantly
Solution Approach 1:
The patent segments the cell population into two groups: hematopoietic cells that can be processed by traditional flow cytometry sorting, and non-hematopoietic adherent cells that are cultured on extracellular matrix-coated surfaces. This segmentation allows each cell type to be handled with appropriate methods, simplifying the overall protocol compared to attempting to use a single complex method for all cell types
Solution Approach 2:
Instead of trying to adapt traditional sorting methods to work with adherent cells, the patent inverts the approach by growing cells on a specialized surface that enables direct visualization and selection, then releasing selected cells without requiring them to be in suspension format. This reverses the conventional workflow of suspension culture → sort → analysis
3Manufacturing precision
If limiting dilution or genetically engineered resistance methods are used for cell selection, then desired cells can be isolated, but the time required for selection increases
Solution Approach 1:
The patent performs preliminary actions by pre-coating the growth surface with extracellular matrix components and pre-identifying desired cell types through their natural adhesion properties or surface markers before release. This preliminary preparation allows for direct visualization and selection of target cells, eliminating the need for time-consuming limiting dilution series or genetic engineering steps
Solution Approach 2:
The patent utilizes the natural properties of adherent cells to grow and attach themselves to the extracellular matrix-coated surface, where they can be directly observed and selected. The cells essentially select themselves for isolation based on their adhesion characteristics, eliminating the need for external selection pressures or genetic modification
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 method allows for the precise and gentle release of individual cells or particles, preserving their integrity and enabling high-purity harvesting for downstream analysis without contamination or complex handling, suitable for rare cell detection and disease diagnosis.
Implementation Method 1
using photocleavable or thermally cleavable linkers to dissociate and harvest cells with high precision and integrity
Implementation Method 2
using photocleavable or thermally cleavable linkers to dissociate and harvest cells with high precision and integrity
Data Source
AI summary
A method of individually releasing from an entity one or more members of a sub-group of biological units comprised in a heterogeneous group of biological units is provided. The method comprises binding said group of biological units comprising said sub-group of biological units to said entity via a linker. Following binding, the location of said one or more members on said entity is determined. Once the location is determined, a localized physical pulse is applied to said one or more members. The localized physical pulse individually releases the one or more members from the entity by dissociating the linker.