Intestinal Epithelial Cell Differentiation for Barrier Preservation
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Solution Overview
Problem
Existing methods for producing intestinal epithelial cells from pluripotent stem cells face challenges in maintaining barrier function and suppressing differentiation into liver cells, leading to inefficient culture operations and contaminated test results.
Innovation Solution
A method involving the replating of cells during the differentiation process at specific timings using a combination of MEK1 inhibitor, DNA methylation inhibitor, TGFβ receptor inhibitor, and EGF, along with cAMP activators, while culturing in large vessels and transferring to porous membranes, maintains barrier function and reduces liver cell contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If differentiation is induced in a large culture vessel to improve operational efficiency, then productivity is improved, but the barrier function is lost due to insufficient intestinal epithelial cell layer formation
Solution Approach 1:
The differentiation process is divided into two distinct phases: Phase 1 in a large culture vessel for efficient cell expansion, and Phase 2 by transferring cells to a porous membrane for barrier function formation. This segmentation allows each phase to be optimized for its specific purpose while maintaining overall efficiency.
Solution Approach 2:
The intestinal epithelial cells are pre-differentiated in a large culture vessel before being transferred to the porous membrane. This preliminary action allows the cells to reach sufficient numbers and basic differentiation state before the critical barrier function formation phase, ensuring both efficiency and functionality.
2Reliability
If differentiation is induced directly on the porous membrane to maintain barrier function, then the barrier function is maintained, but operational efficiency decreases due to limited culture space
Solution Approach 1:
The culture process is segmented into two locations: initial differentiation in a large vessel and final barrier formation on the porous membrane. This spatial segmentation resolves the conflict between having enough culture space for efficiency and providing the right microenvironment for barrier function.
Solution Approach 2:
Cells are pre-cultured and pre-differentiated in a large volume before being transferred to the limited space of the porous membrane. This preliminary expansion phase ensures sufficient cell numbers are achieved before the critical barrier formation phase, combining the advantages of both approaches.
3Device complexity
If conventional differentiation methods are used, then the process is simple, but liver cell contamination occurs reducing measurement precision
Solution Approach 1:
The culture conditions are changed between Phase 1 and Phase 2, with specific growth factors and inhibitors added during the differentiation phase to guide cells toward intestinal epithelial lineage while suppressing liver cell differentiation. This parameter change ensures high purity without significantly complicating the overall process.
Data Source
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AI summary
An object of the present invention is to provide a method for producing an intestinal epithelial cell in which the barrier function is maintained while the differentiation of a pluripotent stem cell into a liver cell is suppressed and an intestinal epithelial cell in which the barrier function is maintained while the differentiation into a liver cell is suppressed. According to the present invention, provided is the method for producing an intestinal epithelial cell, including a step 1 of differentiating a pluripotent stem cell into an intestinal stem cell and a step 2 of differentiating the intestinal stem cell obtained in the step 1 into an intestinal epithelial cell in a presence of one or more selected from the group consisting of a MEK1 inhibitor, a DNA methylation inhibitor, and a TGFβ receptor inhibitor, and EGF, in which during the step 2, a cell under differentiation is replated one or more times at the predetermined timing which is defined in the present specification.