Kidney Production via Precursor Cell Transplantation
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Solution Overview
Problem
Current methods for kidney regeneration, such as using stem cells, have not reached a stage where kidneys with complex three-dimensional structures can be effectively regenerated due to low self-repairing ability and complications in cell composition, and there is a shortage of organ donors for end-stage renal disease patients.
Innovation Solution
An in vitro kidney production method involving tissue-specific removal of metanephric mesenchyme and ureteric bud from a non-human animal, followed by transplantation of allogeneic or xenogeneic kidney precursor cells, which are differentiated and matured to form a functional kidney, using genetic systems like Cre-loxP and diphtheria toxin to ensure high efficiency and minimal rejection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stem cell-based kidney regeneration is attempted, then kidney function restoration is possible, but the complex three-dimensional structure cannot be effectively regenerated due to low self-repairing ability
Solution Approach 1:
The invention segments the kidney development process by separately culturing metanephric mesenchyme and ureteric bud in defined media to induce specific differentiation, then combining them to form functional kidney structures. This segmentation allows precise control over each tissue component's development, enabling complex three-dimensional structure regeneration that stem cell approaches cannot achieve.
Solution Approach 2:
The invention performs preliminary actions by pre-differentiating metanephric mesenchyme into kidney precursor cells and preparing ureteric bud structures before combining them. This preliminary preparation of specific cell types and structures enables the subsequent formation of functional kidney units with proper three-dimensional architecture, overcoming the limitation of direct stem cell differentiation.
2Productivity
If allogeneic or xenogeneic kidney precursor cells are transplanted, then kidney production efficiency is improved, but immune rejection risk increases
Solution Approach 1:
The invention changes the parameter of cell source by using allogeneic or xenogeneic kidney precursor cells instead of autologous cells, thereby improving kidney production efficiency. The defined culture media and differentiation protocols ensure that these transplanted cells can engraft and function effectively, achieving high productivity while managing immune rejection risk through controlled differentiation and maturation processes.
3Productivity
If metanephric mesenchyme is completely removed, then kidney precursor cell transplantation efficiency is improved, but the scaffold for cell attachment is reduced
Solution Approach 1:
The invention extracts and removes metanephric mesenchyme from the metanephros to create space for kidney precursor cell transplantation, thereby improving transplantation efficiency. The removal is performed in a controlled manner that preserves the essential scaffold structure provided by the ureteric bud and surrounding matrix, ensuring that transplanted cells have adequate attachment sites while maximizing transplantation success.
Data Source
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AI summary
The present invention provides a kidney production method including a step of tissue-specifically removing a metanephric mesenchyme of a metanephros of a non-human animal; a step of transplanting, into the metanephros, a kidney precursor cell derived from a non-human animal which is allogeneic or xenogeneic to the non-human animal; and a step of advancing development of the metanephros, which is a step in which the transplanted kidney precursor cell is differentiated and matured to form a part of the kidney.