Transplantation Construct Linking Structure and Cell Mass
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Solution Overview
Problem
Existing methods struggle to artificially reconstitute complex duct structures linked to epithelial sheets or systems of large vessels thicker than arterioles or venules, limiting the reproducibility and complexity of organoid generation.
Innovation Solution
A construct comprising a structure and a cell mass linked together, where the structure can mimic or resemble a living body structure and function, is used for transplantation. This construct includes an in vitro fusion between an organoid and a vascular structure, enabling earlier blood perfusion after transplantation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If cell-cell interactions are used to induce self-organization, then minute tissue structures such as epithelial sheet or capillary network can be reconstituted, but complicated duct structures linked to epithelial sheets or large vessels thicker than arterioles or venules cannot be reconstituted
Solution Approach 1:
The patent introduces a scaffold as an intermediary structure that provides physical support and architectural framework for tissue formation. The scaffold enables complex duct structures and large vessels to be reconstituted by serving as a mediator between cell-cell interactions and the desired complex tissue architecture, which cannot be achieved by cell-cell interactions alone
Solution Approach 2:
The patent divides the tissue reconstitution process into multiple components: a scaffold providing structural framework and cell masses providing biological functionality. This segmentation allows independent optimization of structural support and tissue formation, enabling reconstitution of complex structures that exceed the capabilities of cell-autonomous differentiation alone
2Reliability
If vascularized organoid is transplanted into living body, then organoid can be anastomosed to blood vessels of recipient, but blood perfusion takes at least several days to start
Solution Approach 1:
The patent performs preliminary vascularization by incorporating vascular structures into the organoid before transplantation. This preliminary action ensures that blood vessels are pre-formed and ready for immediate anastomosis, eliminating the delay of several days required for post-transplantation vascular development and enabling immediate blood perfusion
3Ease of manufacture
If undifferentiated cells are cultured three-dimensionally, then tissue structures can be generated based on cell-autonomous multilineage differentiation, but arbitrary organogenesis with reproducibility cannot be achieved
Solution Approach 1:
The patent uses a scaffold as an intermediary that provides predetermined structural guidance to undifferentiated cells during three-dimensional culture. This scaffold-mediated approach maintains the simplicity of cell-autonomous differentiation while achieving reproducible arbitrary organogenesis by constraining cell differentiation and organization along predefined architectural pathways
Data Source
AI summary
The present invention provides a system for artificially inducing and regulating “tissue interactions” among multiple tissues. A construct for transplantation into a living body, which comprises a structure and a cell mass linked to each other, the structure being an object having a three-dimensional structure and capable of mimicking or resembling a structure and/or a function of the living body.