Pluripotent Stem Cell Screening via Primitive Endoderm Gene Markers
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Solution Overview
Problem
Current methods for inducing differentiation of pluripotent stem cells into specific cells, such as myocardial or nerve cells, face variability in differentiation potency among donors and established strains, necessitating a more effective screening method to select high-potency stem cells for efficient production of differentiated cells.
Innovation Solution
Measuring the expression level of genes specific to primitive endoderm cells, like CER1, LEFTY1, LEFTY2, NODAL, and CXCR4, in pluripotent stem cells to identify and select those with lower expression levels, indicating higher differentiation potential into mesoderm or ectoderm-derived cells, thereby enhancing the efficiency of cell production and quality evaluation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pluripotent stem cells are used for differentiation into specific cells, then various differentiated cells can be obtained, but the differentiation potency varies between donors and strains leading to inconsistent production efficiency
Solution Approach 1:
The patent applies preliminary action by measuring gene expression levels (such as CER1, LEFTY1, LEFTY2, NODAL, and CXCR4) before the differentiation process to identify and select pluripotent stem cells with high differentiation potency. This pre-screening approach allows researchers to choose cells that are most likely to differentiate efficiently into target cells, thereby improving both productivity and reliability of the differentiation process.
2Adaptability or versatility
If a screening method based on blood cell differentiation genes (TRIM58, CTSF, FAM19A5, TCERG1L) is used, then iPS cells with high blood cell differentiation potency can be selected, but methods for evaluating differentiation potency into other specific cells are required
Solution Approach 1:
The patent applies universality by developing a screening method that uses genes expressed by primitive endoderm cells (CER1, LEFTY1, LEFTY2, NODAL, CXCR4) as indicators. These genes serve as universal markers that can predict differentiation potency into multiple cell types including myocardial cells, nerve cells, and other mesoderm or ectoderm-derived cells, making the screening method applicable across different differentiation targets rather than being limited to blood cell differentiation only.
3Manufacturing precision
If stepwise differentiation with complicated culture conditions is used for a relatively long period, then differentiated cells can be obtained, but production time and process complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-selecting pluripotent stem cells with high differentiation potency based on gene expression levels before initiating the differentiation process. This pre-selection ensures that the chosen cells will progress through the stepwise differentiation protocol more efficiently, reducing the overall time required while maintaining the necessary culture conditions and differentiation control precision.
Solution Approach 2:
The patent applies parameter changes by using gene expression levels (CER1, LEFTY1, LEFTY2, NODAL, CXCR4) as selection criteria to identify cells with optimal differentiation potential. By changing the selection parameter from random or morphology-based selection to gene expression-based selection, the process achieves faster and more reliable differentiation outcomes.
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AI summary
An object of the present invention is to provide a producing method for a pluripotent stem cell capable of differentiating into a specific cell. According to the present invention, there is provided a producing method for a pluripotent stem cell capable of differentiating into a specific cell. According to the present invention, there is provided a pluripotent stem cell capable of differentiating into a specific cell. According to the present invention, there is provided a producing method for a differentiated cell, and a differentiated cell. According to the present invention, there is provided a method for quality evaluation of a pluripotent stem cell. Further, according to the present invention, there is provided a method of screening a pluripotent stem cell capable of differentiating into a specific cell.