Lymph Node Transplantation for Ectopic Organ Regeneration
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Solution Overview
Problem
The shortage of available organs for transplant poses a significant medical, social, and economic challenge, and existing cell-based therapies often face challenges in establishing an optimal in vivo site for cell and tissue transplantation, particularly in conditions like cirrhotic and fibrotic liver disease or DiGeorge syndrome.
Innovation Solution
The use of lymph nodes as an environment to promote the survival and expansion of healthy cells and tissues, achieved by directly injecting non-lymphoid cells, such as hepatocytes, thymic cells, and pancreatic islets, into lymphoid tissues, allowing them to proliferate and potentially restore organ functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If orthotopic cell-based therapy is directed at a diseased organ, then organ function restoration is attempted, but the lack of appropriate environment in cirrhotic and fibrotic liver or absence of thymus makes it infeasible
Solution Approach 1:
The patent uses lymph nodes as intermediary sites for cell transplantation. Instead of directly transplanting cells into the diseased organ (liver or thymus), cells are transplanted into lymph nodes which then serve as intermediate locations where cells can survive, proliferate, and potentially migrate to or support the target organ function.
Solution Approach 2:
The patent inverts the traditional transplantation approach by not placing cells directly in the target organ. Instead, cells are placed in lymph nodes (an indirect location), reversing the conventional orthotopic transplantation route to overcome the unsuitable environment of diseased organs.
2Productivity
If the shortage of organs for transplant is addressed by developing alternative cell-based therapies, then transplant availability increases, but establishing an optimal in vivo site for cell and tissue transplantation remains challenging
Solution Approach 1:
The patent proposes using lymph nodes as a universal transplantation site that can accommodate multiple types of cells (hepatocytes, thymic cells, pancreatic islets) and serve multiple functions (cell proliferation, survival support, potential organ function restoration), simplifying the transplantation process across different organ failures.
3Productivity
If lymph nodes are used as transplantation sites to promote cell survival and expansion, then ectopic tissue generation is achieved, but the physiological relevance and long-term function of these ectopic tissues remain to be validated
Solution Approach 1:
The patent relies on the lymph node's inherent biological properties (stromal cells, chemokines, vascular network) to automatically support cell survival and proliferation without external intervention. The lymph node environment self-regulates to provide necessary nutrients, growth factors, and structural support for ectopic tissue development.
Data Source
AI summary
The present invention relates to methods and compositions for transplanting non-lymphoid tissues into lymphoid organs. It may be used to cultivate organ tissues including for the purpose of supplementing or reconstituting organ function. Tissues that may be propagated in this manner include but are not limited to lung, kidney, thyroid, intestine, and brain.