Degradable 3D Matrix for Target Cell Capture and Recovery
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Solution Overview
Problem
Current methods for preserving target cells from fluid samples are limited in efficiently capturing and recovering cells for further use, as they often require complex processes and do not allow for the degradation of the capture matrix for cell retrieval.
Innovation Solution
A degradable three-dimensional matrix with a non-degradable inner core and a degradable outer layer containing a capture ligand is used to capture target cells, which can be degraded to release the cells, enabling their use in tissue culture, diagnostic testing, or therapeutic administration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a capture matrix is used to retain target cells, then cell capture efficiency is improved, but cell recovery becomes difficult
Solution Approach 1:
The capture matrix is segmented into two distinct layers: an inner core layer that retains cells and an outer shell layer that can be degraded. This segmentation allows the inner core to perform cell capture while the outer shell can be removed via enzymatic degradation, enabling easy cell recovery without compromising capture efficiency.
Solution Approach 2:
The outer shell layer is designed to be degradable through enzymatic action, allowing it to be discarded selectively while recovering the target cells retained in the inner core. This enables the matrix to transition from a permanent capture structure to a temporary scaffold that can be removed after cell recovery.
2Ease of operation
If a degradable matrix is used to release target cells, then cell recovery is improved, but matrix stability during capture is reduced
Solution Approach 1:
The matrix is divided into a stable inner core layer and a degradable outer shell layer. The inner core provides structural stability during the cell capture process, while the outer shell provides degradability for subsequent cell recovery. This segmentation resolves the contradiction between stability and degradability.
Solution Approach 2:
Different regions of the matrix have different properties: the inner core is designed for stability and cell retention, while the outer shell is designed for enzymatic degradation. This local differentiation of properties allows the matrix to simultaneously achieve stability during capture and ease of recovery.
3Area of stationary object
If a three-dimensional matrix structure is used, then cell capture surface area is increased, but matrix complexity increases
Solution Approach 1:
The three-dimensional matrix is segmented into concentric layers (inner core and outer shell), which simplifies the overall structure while maintaining high surface area. This layered segmentation reduces manufacturing complexity compared to creating a fully three-dimensional porous structure.
Solution Approach 2:
The inner core layer is nested within the outer shell layer, creating a concentric three-dimensional structure. This nesting arrangement maximizes the capture surface area within a compact form factor while maintaining structural simplicity and ease of manufacturing.
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 method effectively captures and recovers viable target cells, allowing for their utilization in various applications, including tissue culture and diagnostic testing, while enabling cryopreservation and subsequent recovery of cells from the matrix.
Implementation Method 1
the capture ligand has affinity for a target cell in the sample
Implementation Method 2
recovering target cells retained by the matrix by substantially degrading the outer layer of the matrix with a degradative enzyme
Implementation Method 3
The matrix can be preserved (e.g., cryopreserved using a solution containing dimethylsulfoxide)
Data Source
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AI summary
Methods for obtaining and preserving target cells using degradable three dimensional matrices are described.