Placental Stem Cell Collection via Sequential Perfusion
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Solution Overview
Problem
Current methods for collecting stem cells from umbilical cord blood are insufficient to treat adult patients, as they often do not yield enough cells, and existing methods for placental stem cell collection are inefficient.
Innovation Solution
A method involving the drainage of cord blood from the placenta followed by perfusion with a first solution containing a placental preservative and vasodilator, and a second solution with a stem cell releasing agent, antibiotic, and anticoagulant, to increase the collection of stem cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If cord blood is collected using conventional syringing methods, then the collection process is simple and safe, but the number of stem cells obtained is insufficient to treat adult patients
Solution Approach 1:
The collection process is divided into multiple sequential perfusion steps using different solutions: first a preservative solution to maintain placental integrity, then a stem cell releasing agent solution to mobilize cells, and finally a collection solution to retrieve the stem cells. This segmentation allows each step to optimize for its specific function, dramatically increasing total stem cell yield.
Solution Approach 2:
The preservative solution is applied first to the placenta before stem cell release, preliminarily preserving the placental structure and vasculature. This preliminary action ensures that subsequent perfusion steps can effectively reach and release stem cells without placental degradation, enabling adequate collection for adult treatment.
2Quantity of substance
If the placenta is used as a stem cell source, then up to ten times more stem cells are available than in cord blood, but current collection methods still fail to retrieve enough cells for adult treatment
Solution Approach 1:
A perfusion system using fluid pressure is employed to pump solutions through the placental vasculature. This hydraulic approach ensures complete penetration of the releasing agent throughout the placental tissue, mobilizing stem cells from all regions including deep vascular beds that syringing methods cannot reach, thereby maximizing collection efficiency and yield.
Solution Approach 2:
The chemical parameters of the perfusion solution are specifically modified to include stem cell releasing agents (such as AMD3100 or PLXNO) that alter stem cell adhesion properties. This parameter change in solution composition enables the release of stem cells from the placental endothelium into the circulation, dramatically increasing retrievable cell numbers.
3Quantity of substance
If multiple perfusion solutions are used to increase stem cell collection, then adequate stem cells for adult treatment can be obtained, but the collection process becomes more complex
Solution Approach 1:
Multiple functional solutions (preservative, releasing agent, anticoagulant) are merged into a single integrated perfusion protocol. The solutions are sequentially applied through the same perfusion circuit, combining multiple functions into one unified process that maintains placental integrity, releases stem cells, prevents clotting, and facilitates collection—all through a single operational workflow.
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
This method significantly increases the number of stem cells collected, making it possible to treat adult patients by releasing stem cells from the placenta into the perfusion solutions, which can then be stored and used for therapeutic purposes.
Implementation Method 1
the first perfusion solution comprising a placental preservative base solution and a vasodilator
Implementation Method 2
the second perfusion solution comprising said placental preservative base solution, a stem cell releasing agent, an antibiotic, and an anticoagulant
Data Source
AI summary
Methods and solutions for the preservation and procurement of placental stem cells. A method for collecting stem cells from a placenta includes draining cord blood from the placenta and collecting the drained cord blood in a first collection. The drained placenta is perfused with a first perfusion solution including a placental preservative base solution and a vasodilator. The placenta is perfused with a second perfusion solution including placental preservative base solution, a stem cell releasing agent, an antibiotic, and an anticoagulant, and a predetermined amount of time is allowed to elapse as the first and second perfusion solutions perfuse the placenta. The first and second perfusion solutions, which contain stem cells from the placenta, are then collected in a second collection.