GLIS1 and Klf4 Synergy for iPS Cell Reprogramming Efficiency
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Solution Overview
Problem
Current methods for establishing induced pluripotent stem cells (iPS cells) have not achieved satisfactory improvements in efficiency, despite various attempts with different gene combinations, including the use of TERT and SV40 large T antigen along with the four factors Oct3/4, Sox2, Klf4, and c-Myc.
Innovation Solution
The use of members from the GLIS family, such as GLIS1, and the PTX family, like PITX2, or the DMRT-like family, specifically DMRTB1, in combination with Oct3/4, Sox2, and c-Myc, to enhance the efficiency of iPS cell establishment by substituting for Klf4, demonstrating a synergistic effect with GLIS1 and Klf4.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If various gene combinations including TERT and SV40 large T antigen are used along with Oct3/4, Sox2, Klf4, and c-Myc, then the attempt to improve iPS cell establishment efficiency is made, but satisfactory improvement in efficiency has not been achieved
Solution Approach 1:
The patent changes the parameter of transcription factor combination by replacing Klf4 with alternative factors (Klf5, Klf6, or Esrrb) to achieve improved iPS cell establishment efficiency. This parameter change in the gene combination resolves the contradiction by finding an optimal configuration that enhances productivity without unnecessarily increasing complexity
Solution Approach 2:
The patent identifies transcription factors (Klf5, Klf6, Esrrb) that can universally substitute for Klf4 function in the reprogramming process. This multi-functionality principle allows different factors to perform the same role, improving efficiency while maintaining manageable complexity through functional equivalence
2Productivity
If Klf4 is used in the standard four-factor combination, then iPS cells can be established, but the establishment efficiency remains insufficient
Solution Approach 1:
The patent changes the reliability parameter by substituting Klf4 with alternative transcription factors (Klf5, Klf6, Esrrb) that demonstrate improved reprogramming success rates. This parameter change resolves the contradiction by achieving both higher efficiency and reliability through optimized factor selection
Data Source
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AI summary
Provided are a method of improving the efficiency of establishment of iPS cells, comprising the step of contacting one or more substances selected from the group consisting of members of the GLIS family (e.g., GLIS1) and nucleic acids that encode the same and one or more substances selected from the group consisting of members of the Klf family and nucleic acids that encode the same, with a somatic cell, an iPS cell comprising an exogenous nucleic acid that encodes a member of the GLIS family or a member of the Klf family, that can be obtained by the method, and a method of producing a somatic cell by inducing the differentiation of the iPS cell.