Pulsatile Perfusion for Stem Cell Extraction Yield
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Solution Overview
Problem
Current methods for obtaining pluripotent stem cells from non-embryonic sources, such as umbilical cord and placenta, face challenges in yield, particularly for adult bone marrow transplants, due to insufficient stem cell extraction and ethical concerns surrounding embryonic stem cells.
Innovation Solution
The use of pulsatile perfusion to extract stem cells from umbilical cord and placenta, mimicking natural blood flow to increase stem cell yield and efficiency, while maintaining vascular health and allowing for the production of viable stem cell lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gravity drainage or pressure extraction methods are used to obtain stem cells from umbilical cord and placenta, then the extraction process is simple and quick, but the stem cell yield is insufficient for adult bone marrow transplants
Solution Approach 1:
The patent applies pulsatile perfusion, which uses periodic pressure variations to mimic natural blood flow patterns. This periodic action enhances stem cell extraction efficiency by creating pressure gradients that facilitate cell movement from the umbilical cord and placenta into the collection medium, thereby increasing yield without requiring overly complex equipment
Solution Approach 2:
The invention utilizes hydraulic principles by implementing a perfusion system that circulates fluid through the umbilical cord and placenta. This hydraulic approach creates controlled pressure differentials that drive blood and stem cells from the tissue into the collection bag, significantly improving extraction efficiency compared to simple gravity drainage
2Productivity
If pulsatile perfusion is used to extract stem cells, then stem cell yield increases significantly, but the perfusion system complexity increases
Solution Approach 1:
The pulsatile perfusion system employs periodic pressure cycles that mimic natural cardiac function. This periodic action creates optimal conditions for stem cell release and collection, achieving up to twice the yield of conventional methods while using a perfusion pump that, although more complex than gravity drainage, remains manageable in complexity
Solution Approach 2:
The system dynamically adjusts perfusion parameters including pressure, flow rate, and pulse frequency to optimize stem cell extraction. By changing these parameters during the procedure, the system maximizes yield while adapting to varying tissue conditions, balancing performance with operational complexity
3Productivity
If non-pulsatile perfusion is used, then the system is simpler to operate, but stem cell extraction efficiency is reduced
Solution Approach 1:
The pulsatile nature of the perfusion system creates periodic pressure gradients that enhance convective transport of stem cells from the umbilical cord and placenta into the collection medium. This periodic action significantly improves extraction efficiency compared to continuous non-pulsatile flow, while the underlying perfusion technology remains based on established medical equipment
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
Pulsatile perfusion method achieves up to twice the stem cell yield compared to traditional methods, enabling sufficient stem cells for adult bone marrow transplants and producing high-purity stem cell lines for therapeutic use.
Implementation Method 1
pulsatile perfusion increases the osmotic pressure of the perfusion solution, thus more efficiently removing the placental blood from the interior of the placental cells
Implementation Method 2
pulsatile perfusion has been shown to vasodilate the vascular structure of organs and also vasodilates the placental vascular structure
Implementation Method 3
pulsatile perfusion increases the osmotic pressure of the perfusion solution, thus more efficiently removing the placental blood from the interior of the placental cells
Data Source
AI summary
A method for extracting stem cells from a non-embryonic stem cell source, including providing a non-embryonic stem cell source including stem cells; perfusing the non-embryonic stem cell source with a pulsatile flow of a perfusion solution to produce a perfusate including stem cells and a perfused non-embryonic stem cell source; and isolating the stem cells from the perfusate to produce isolated stem cells, is provided. Also provided is a non-embryonic stem cell line derived from a non-embryonic stem cell obtained using the pulsatile perfusion extraction method.