Cell Growth Substrates with Tubular Passages for Uniform Cell Distribution
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Solution Overview
Problem
The clinical implementation of cell-containing graft materials has been slow due to the need for more convenient and effective ways to combine cells with cell growth substrates for enhanced survival and expansion in patients.
Innovation Solution
The development of cell growth substrates with elongate tubular passages and methods for preparing cell-seeded compositions, including pre-conditioning substrates with serum proteins and combining cell suspensions with extracellular matrix materials to form flowable, cellular grafts, facilitate even distribution and adherence of cells within the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If cells are applied to cell growth substrates using conventional methods, then the process is simple, but cell distribution and adherence are insufficient
Solution Approach 1:
The substrate is divided into multiple tubular passages that segment the cell suspension flow path, enabling uniform distribution of cells throughout the substrate volume. Each passage acts as an independent channel for cell delivery, ensuring even spatial distribution.
Solution Approach 2:
The substrate employs a porous structure with tubular passages that allow cell suspension to penetrate and distribute throughout the material. The porous architecture facilitates cell adherence while maintaining structural integrity and enabling nutrient transport.
2Reliability
If cells are combined with cell growth substrates without pre-conditioning, then the process is faster, but cell survival and expansion are reduced
Solution Approach 1:
The substrate is pre-conditioned with serum proteins before cell application to create a favorable surface for cell adherence and survival. This preliminary treatment modifies the substrate surface properties to enhance cell compatibility without requiring extensive preparation time.
Solution Approach 2:
Serum proteins act as an intermediary substance between the cell suspension and the cell growth substrate. These proteins mediate the interaction by coating the substrate surface, providing attachment sites for cells, and improving overall cell survival during the seeding process.
3Productivity
If cells are applied to substrates without flow distribution features, then the substrate structure is simpler, but cell expansion and survival are enhanced
Solution Approach 1:
The substrate incorporates segmented tubular passages that divide and distribute cell suspension flow throughout the substrate volume. This segmentation ensures uniform cell distribution across multiple regions, facilitating consistent cell expansion and survival throughout the entire graft material.
Solution Approach 2:
The substrate transitions from a simple two-dimensional surface to a three-dimensional structure with internal tubular passages. This dimensional addition enables cell suspension to penetrate deep into the substrate interior, allowing cell expansion throughout the volume rather than仅限于 the surface.
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 approach enhances the combination and expansion of cells within the substrates, improving the effectiveness and convenience of cell-containing graft materials for medical applications by ensuring better cell distribution and adherence, thereby supporting improved tissue repair and regeneration.
Implementation Method 1
The lumen can be configured to receive flow of a cell-containing liquid medium to distribute cells into the interior region of the cell growth substrate
Implementation Method 2
Sometimes, these uses involve a culture period in which the number of cells is expanded after application to the cell growth substrate
Data Source
AI summary
Described are methods, cell growth substrates, and devices that are useful in preparing cell-containing graft materials for administration to patients. Tubular passages can be defined in cell growth substrates to promote distribution of cells into the substrates. Also described are methods and devices for preparing cell-seeded graft compositions, methods and devices for preconditioning cell growth substrates prior to application of cells, and cell seeded grafts having novel substrates, and uses thereof.