Mesenchymal Stem Cell Purification via Helical Polymer Surface
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Solution Overview
Problem
Current methods for isolating and purifying mesenchymal stem cells, such as those involving enzymes like collagenase, are costly, time-consuming, and can lead to cell differentiation, while non-enzymatic methods like mechanical dissociation and adherence-based separation require extensive processing time and may not yield pure stem cells.
Innovation Solution
A non-enzymatic mechanical method utilizing a polymer surface with a geometrical design, such as a helical or threaded shape, to separate mesenchymal stem cells from other components based on flow rates, allowing for rapid purification and retention of stem cells without adherence, enabling immediate clinical use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If enzymatic methods (collagenase, trypsin) are used for isolation, then cell separation is achieved, but cell modification and high cost occur
Solution Approach 1:
The patent replaces enzymatic chemical action with a mechanical separation system. A centrifugal separator subjectad to gravity creates a centrifugal field that mechanically separates stem cells from other components based on density and size differences, eliminating the need for collagenase or trypsin enzymes that cause cell modification.
Solution Approach 2:
The invention changes the separation parameter from chemical (enzyme specificity) to physical (centrifugal force and density). By controlling rotation speed and gravitational field strength, the system achieves separation without chemical modification, transforming the separation mechanism from biochemical to biophysical.
2Manufacturing precision
If adhesion-based separation is used, then stem cells are purified, but processing time increases to 2 weeks
Solution Approach 1:
The patent skips the lengthy adhesion process by using centrifugal separation that achieves purification in minutes rather than weeks. The centrifugal field directly separates cells based on physical properties without requiring them to adhere to surfaces over extended periods, dramatically reducing processing time while maintaining purification quality.
Solution Approach 2:
The invention extracts the time-consuming adhesion step from the purification process entirely. Instead of relying on slow adhesion-based separation, the system uses centrifugal force to directly extract and separate stem cells from the mixture in a single rapid operation.
3Loss of time
If mechanical dissociation is used, then processing time is reduced, but cell purity is insufficient
Solution Approach 1:
The patent introduces a centrifugal field as an intermediary separation mechanism. Rather than relying solely on mechanical dissociation which mixes all components, the centrifugal field acts as a mediator that sorts cells by density and size, achieving both speed and purity by combining mechanical disruption with physical separation.
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 efficiently purifies mesenchymal stem cells quickly, preventing differentiation and chemical modification, allowing for immediate clinical application and compliance with regulatory standards, with the potential for same-procedure sample processing and therapeutic use.
Implementation Method 1
flowing said sample comprising mesenchymal stem cells on a polymer surface at a first flow rate allowing to separating said sample into a first remaining sample comprising mesenchymal stem cells on the polymer surface and into a second resulting solution being evacuated from the polymer surface
Implementation Method 2
the polymer surface comprises at least one vertical helical-shaped portion, at least one vertical threaded shaped portion, or at least one vertical grooved shaped portion
Data Source
AI summary
A method of purifying adipose-derived mesenchymal stem cells from a sample of adipose tissue, including: flowing the sample onto a polymer surface having at least one vertical helical-shaped portion, vertical threaded shaped portion, or vertical grooved shaped portion at a first flow rate of 10 to 150 ml/min allowing separation into a first remaining sample including mesenchymal stem cells on the polymer surface and into a second resulting solution being evacuated from the polymer surface; flowing a saline solution onto the polymer surface at a second flow rate of 100 to 500 ml/min, the first flow rate being slower than the second flow rate; and collecting the saline solution including purified mesenchymal stem cells in a collector. Also, an apparatus and a system for purifying adipose-derived mesenchymal stem cells, the use of the apparatus, and a method of isolating and purifying adipose-derived mesenchymal stem cells from an adipose tissue sample.