Stem Cell Delivery via Biliary Tree for Pancreatic Engraftment
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Solution Overview
Problem
Current stem cell therapies for pancreatic conditions face challenges due to the sensitivity of the pancreas to manual manipulation and the limited effectiveness of cell transplantation methods, which often result in low engraftment rates and ectopic cell distribution, making it difficult to treat pancreatic diseases like diabetes effectively.
Innovation Solution
The method involves creating a suspension of pancreatic stem/progenitor cells combined with biomaterials such as collagens, adhesion molecules, and growth factors, which is introduced into the hepato-pancreatic common duct, allowing the cells to mature and migrate to the pancreas, thereby treating pancreatic dysfunction without physically disturbing the organ.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cell transplantation methods are used to treat pancreatic conditions, then cell transplantation can be performed, but engraftment rates are low and ectopic cell distribution occurs
Solution Approach 1:
The patent uses the biliary tree as an intermediary pathway to deliver stem cells to the pancreas. Instead of directly transplanting cells into the pancreas (which causes low engraftment and ectopic distribution), cells are delivered via the biliary tree where they naturally migrate to the pancreas, achieving high engraftment rates and proper cell distribution.
2Ease of operation
If manual manipulation is used to access the pancreas for cell transplantation, then direct cell delivery is possible, but the pancreas is damaged due to its sensitivity to manual manipulation
Solution Approach 1:
The patent replaces direct mechanical access to the pancreas with a biological pathway through the biliary tree. Instead of manually manipulating the pancreas (which causes damage), cells are delivered through the biliary tree using natural physiological pathways, eliminating mechanical trauma while maintaining delivery effectiveness.
3Productivity
If stem cells are transplanted directly into the pancreas, then treatment can be administered, but immunosuppressive drugs are required due to immunogenicity
Solution Approach 1:
The biliary tree serves as a biological intermediary that facilitates immune evasion. When stem cells are delivered through the biliary tree rather than direct pancreatic transplantation, the immune system does not recognize the cells as foreign, eliminating the need for immunosuppressive drugs while maintaining treatment effectiveness.
Data Source
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AI summary
A method of repairing diseased or dysfunctional pancreas or liver is provided. The method involves preparation of a suspension of stem cells and/or progenitor cells such as biliary tree stem cells, hepatic stem cells, pancreatic stem cells or their descendants, committed progenitor cells, from healthy tissue of the patient or of the biliary tree of a non-autologous donor and engrafting the cells into the wall of bile ducts near to the organ to be treated. The graft consists of stem cells or progenitors that are admixed with biomaterials and, optionally, with cytokines and/or native epithelial-mesenchymal cells appropriate for the maturational lineage stage of the cells to be engrafted. The cells are specifically introduced to the hepato-pancreatic common duct of the subject for treatment of pancreatic conditions or to the bile duct wall near to the liver for treatment of liver conditions and allowed to migrate to the pancreas or to the liver and expand and then rebuild part or the entirety of the diseased or dysfunctional organ.