Mesenchymal Stem Cell-Hydrogel Beads for Engraftment
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Solution Overview
Problem
Current methods for preparing stem cell therapeutic agents using proteolytic enzymes damage intercellular bonding and basement membrane proteins, result in low engraftment rates, and are inefficient due to cell loss during processing, while existing hydrogel compositions for injecting stem cells lack a consistent formulation and effective cryopreservation methods.
Innovation Solution
A method for preparing a mesenchymal stem cell-hydrogel composition in a bead form with a diameter of 5 mm or less, allowing for easy filling into syringes, cryopreservation, and simple removal of cryopreservation solutions, where stem cells are attached to hydrogel scaffolds, avoiding proteolytic enzyme treatment and maintaining cell membrane integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If proteolytic enzymes are used to treat isolated cells, then cell separation is achieved, but intercellular bonding and basement membrane proteins are damaged
Solution Approach 1:
The patent extracts and removes the harmful proteolytic enzyme treatment step from the cell preparation process. Instead of using proteolytic enzymes to separate cells, the invention directly uses isolated cells without enzymatic treatment, thereby eliminating the damage to intercellular bonding and basement membrane proteins while still achieving cell separation for therapeutic use
Solution Approach 2:
The patent employs a simple, disposable approach by using pre-isolated cells that can be directly incorporated into hydrogel beads without requiring complex enzymatic treatment and washing steps. This eliminates the need for expensive enzyme treatments and multiple washing-centrifugation cycles, reducing both cost and cell loss
2Object-affected harmful factors
If cells are washed and centrifuged multiple times to remove animal-derived material, then contamination is reduced, but cell loss increases
Solution Approach 1:
The patent removes the harmful washing-centrifugation process entirely from the cell preparation method. By using isolated cells without proteolytic enzyme treatment, there is no animal-derived material (such as FBS) to remove, thereby eliminating the need for repeated washing steps that cause cell loss
Solution Approach 2:
The invention uses a simplified, single-step cell isolation approach that eliminates the need for multiple washing-centrifugation cycles. This disposable-style approach uses isolated cells directly in hydrogel beads without requiring repeated processing steps, thereby minimizing cell loss while still ensuring purity
3Ease of operation
If mesenchymal stem cells are separated into single cells, then cell suspension is achieved, but engraftment rate decreases due to cell death
Solution Approach 1:
The patent creates a composite structure by combining mesenchymal stem cells with hydrogel beads. The hydrogel provides a protective matrix that maintains cell viability while allowing suspension and injection. This composite cell-hydrogel structure prevents cell death that would otherwise occur when cells are separated into single-cell suspension, thereby maintaining high engraftment rates
Solution Approach 2:
The hydrogel bead acts as a flexible protective shell around the mesenchymal stem cells. This shell maintains cell integrity and viability during suspension and injection processes, preventing the cell death that would otherwise occur when cells are separated into single-cell form, thereby preserving engraftment capability
4Ease of operation
If stem cells are injected alone into the body, then injection simplicity is maintained, but cell loss at injection site increases
Solution Approach 1:
The patent creates a composite cell-hydrogel formulation where mesenchymal stem cells are embedded in hydrogel beads. This composite structure maintains injection simplicity while preventing cell loss at the injection site, as the hydrogel matrix holds cells together and facilitates controlled delivery to the target tissue
Solution Approach 2:
The hydrogel bead serves as a flexible carrier shell that encapsulates stem cells for injection. This shell maintains cell integrity during injection and facilitates controlled release at the target site, preventing cell loss while maintaining operational simplicity
5Adaptability or versatility
If hydrogel diameter is not controlled, then preparation flexibility is maintained, but syringe filling difficulty increases
Solution Approach 1:
The patent controls the physical parameter of hydrogel bead diameter to be 5 mm or less. This parameter control enables the hydrogel beads to be easily filled into syringes and administered via injection, while still maintaining preparation flexibility for different therapeutic applications
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 increases engraftment rates by maintaining the paracrine effect of stem cells, allows for the use of healthy cells without membrane damage, and facilitates easy removal of cryopreservation solutions, enabling effective administration and therapeutic use of stem cells for musculoskeletal, fistula, and inflammatory diseases.
Implementation Method 1
since stem cells are attached to scaffolds in hydrogel beads, the stem cells are not easily lost or killed after the injection
Implementation Method 2
a method of preparing stem cell-hydrogel in a constant form with a diameter of 5 mm or less to be developed into a formulation that can be easily filled into a syringe, cryopreserved, and immediately thawed
Implementation Method 3
a method of preparing stem cell-hydrogel in a constant form with a diameter of 5 mm or less to be developed into a formulation that can be easily filled into a syringe, cryopreserved, and immediately thawed to be used
Data Source
AI summary
The present invention relates to a composition containing injectable mesenchymal stem cell-hydrogel and a method of preparing the same. Specifically, in a mesenchymal stem cell-hydrogel composition for injection prepared by a method of the present invention, since stem cells are attached to scaffolds in hydrogel beads, the stem cells are not easily lost or killed after the injection, and thus there is an advantage that an engraftment rate increases since the paracrine effect of the stem cells is continuously exhibited, and the stem cells are gradually released as hydrogel is degraded. In addition, the present invention has an advantage that healthy cells can be used without damages in cell membranes since injection formulation can be prepared without a treatment with proteolytic enzymes, and also a cryopreservation solution is easily removed from the mesenchymal stem cell-hydrogel beads even after freezing and thawing.