Neural Stem Cell Isolation via Enzymatic Digestion and Size-Based Clump Separation
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Solution Overview
Problem
Current methods for isolating and culturing neural stem cells are time-consuming and have low acquisition yields, primarily due to the use of single cell isolation techniques like Percoll®, which raises ethical and safety concerns.
Innovation Solution
A method involving enzyme treatment of brain tissue, physical dissociation of cell clumps, size-based separation, and subculture of clumps in a culture dish, without the use of Percoll®, to enhance efficiency and yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If single cell isolation using Percoll® is used, then neural stem cells can be isolated, but the isolation and culture time is long and the acquisition yield is low
Solution Approach 1:
The patent divides the brain tissue into smaller fragments through mechanical dissociation rather than attempting single-cell isolation. This segmentation approach maintains cell clumps that contain neural stem cells, significantly reducing the time required for isolation while improving acquisition yield compared to sequential single-cell processing methods
Solution Approach 2:
The patent extracts neural stem cells from brain tissue through enzymatic digestion and mechanical dissociation, then separates them from impurities using density gradient centrifugation with Percoll®. This extraction process efficiently isolates neural stem cells while removing unwanted tissue components, achieving both high yield and reasonable processing time
2Reliability
If single cell isolation using Percoll® is used, then neural stem cells can be isolated, but the method is complex and time-consuming
Solution Approach 1:
The patent combines enzymatic digestion with mechanical dissociation in a unified protocol, rather than using separate sequential steps for single-cell isolation. This merged approach maintains cell clumps that preserve neural stem cell integrity while simplifying the overall isolation procedure, reducing both complexity and time requirements
Solution Approach 2:
The patent uses Percoll® density gradient as an intermediary medium to separate neural stem cells from tissue impurities. This intermediary substance enables efficient purification through density-based separation, achieving high isolation purity while maintaining a relatively simple procedural framework
3Quantity of substance
If Percoll® is used for single cell isolation, then cells can be separated, but the acquisition yield of neural stem cells is low
Solution Approach 1:
Instead of isolating single cells and then attempting to identify and select neural stem cells, the patent inverts the approach by maintaining cell clumps that naturally contain neural stem cells. This inversion strategy increases acquisition yield by preserving neural stem cells in their native microenvironment rather than losing them during single-cell isolation and selection processes
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 shortens the isolation and culture time, increases the yield of neural stem cells, and improves cell viability, thereby enhancing the success rate of neural stem cell culture.
Implementation Method 1
placing brain tissue in an enzyme solution for enzyme treatment
Data Source
AI summary
The present invention relates to a method for isolating and culturing neural stem cells with high efficiency, which may shorten the time for isolation and culture by simplifying a method for isolating and culturing neural stem cells and may increase the acquisition yield of neural stem cells. The present invention provides a method for isolating and culturing neural stem cells with high efficiency, comprising the steps of adding brain tissue into an enzyme solution so as to subject the brain tissue to enzyme treatment; physically isolating cell clumps from the enzyme treated brain tissue by dividing the cell clumps according to size and removing impurities; and inoculating the cell clumps on a culture dish so as to subculture.