Somatic Cell Mass Formation via Wnt Signal Activation
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Solution Overview
Problem
Current regenerative medicine techniques face challenges in forming complex organs due to limitations in the differentiation repertoire of artificial tissues like skin and bone, and struggles to maintain a balance between undifferentiated and differentiated cells, preventing the reproduction of coexistence necessary for actual body tissue mimicry.
Innovation Solution
A method involving the culture and combination of multiple types of somatic cells, specifically epithelial and mesenchymal cells, using a Wnt signal activator like 6-bromoindirubin-3′-oxime (BIO) to maintain cells in an undifferentiated state, followed by non-plate contact culturing and medium replacement, to form a cell mass capable of serving as a primitive organ-like structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If regenerative medicine techniques are used to form artificial tissues like skin and bone, then simple tissue reconstruction is achieved, but the differentiation repertoire is limited and complex organs cannot be formed
Solution Approach 1:
The invention segments the complex process of organ formation into distinct phases: first co-culturing epithelial and mesenchymal cells to establish interaction, then separately inducing differentiation. This segmentation allows each cell type to maintain its specific properties while enabling eventual complex organ formation, overcoming the limitation of limited differentiation repertoire in traditional artificial tissue methods.
Solution Approach 2:
The invention performs preliminary co-culture of epithelial and mesenchymal cells before differentiation induction. This preliminary action establishes the necessary cell-cell interactions and tissue architecture in advance, creating a foundation that enables subsequent complex organ differentiation rather than being limited to simple tissue reconstruction.
2Reliability
If epithelial and mesenchymal cells are co-cultured to mimic actual body tissue, then tissue interaction is reproduced, but both cells either differentiate or remain undifferentiated, preventing coexistence of both states
Solution Approach 1:
The invention applies periodic action by first co-culturing cells to establish interactions, then inducing differentiation at a specific time point. This temporal sequencing allows cells to first establish stable interactions in an undifferentiated state, then transition to differentiated states, achieving both reliable tissue interaction reproduction and stable coexistence of differentiated and undifferentiated cells.
Solution Approach 2:
The invention introduces dynamics by controlling the timing of differentiation induction. Rather than cells being statically locked in one state, the system dynamically transitions from a co-culture phase where cells interact while undifferentiated to a differentiation phase where they adopt specific fates, allowing both stability of interaction and flexibility of differentiation state.
3Reliability
If living donor transplants are used to replace lost tissues or organs, then functional restoration is achieved, but rejection occurs and donor shortage limits treatment
Solution Approach 1:
The invention enables self-service by generating patient-specific tissues and organs through controlled differentiation of patient-derived cells. This eliminates the need for external donors and prevents rejection, as the regenerated tissues are immunologically compatible with the patient, thereby resolving both the donor shortage and rejection problems while maintaining functional restoration.
4Reliability
If surgical excision is used to remove affected areas, then disease treatment is achieved, but quality of life considerably decreases
Solution Approach 1:
The invention applies discarding and recovering by removing only the diseased portions through surgical excision while regenerating the lost functional tissue through controlled cell differentiation. This allows effective disease treatment by eliminating pathological tissue while recovering and restoring the missing healthy tissue, thereby maintaining quality of life rather than requiring complete organ removal.
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 allows for the efficient production of cell masses that can form complex organs such as hair follicles and other tissues, enabling accurate drug evaluation and organ reconstruction, with the ability to maintain undifferentiated and differentiated cell interactions, mimicking in vivo tissue formation.
Implementation Method 1
adding a Wnt signal activator to the mixed cell culture; subjecting the culture containing the Wnt signal activator to non-plate contact culturing
Data Source
AI summary
The present invention provides a method of producing a cell mass capable of serving as a primitive organ-like structure comprised of a plurality of somatic cell types of somatic origin, comprising: preparing cultures containing the plurality of types of somatic cells; mixing the plurality of types of somatic cell cultures followed by adding a Wnt signal activator to the mixed cell culture; subjecting the culture containing the Wnt signal activator to non-plate contact culturing over a predetermined time period; and replacing the medium of the culture cultured by the non-plate contact culturing with medium not containing Wnt signal activator and further culturing for a predetermined time period; wherein, at least one type of the plurality of somatic cells is maintained in an undifferentiated state.