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Updated: Jul 19, 2026

Identification of Homologous Recombination Events in Mouse Embryonic Stem Cells Using Southern Blotting and Polymerase Chain Reaction
Published on: November 20, 2018
Targeted chromosome elimination from ES-somatic hybrid cells
Hiroyuki Matsumura1, Masako Tada, Tomomi Otsuji
1Stem Cell Engineering, Institute for Frontier Medical Sciences, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
Researchers engineered stem cell genomes by developing a technology to eliminate specific chromosomes from hybrid cells. This method allows targeted removal of chromosomes, including those with key pluripotency genes like Nanog.
Area of Science:
- Stem cell biology
- Genomic engineering
- Epigenetics
Background:
- Engineering stem cell genomes is crucial for understanding cellular function and development.
- Hybrid cells, formed from embryonic stem cells and somatic cells, offer a unique model for genomic studies.
Purpose of the Study:
- To develop a novel technology for targeted chromosome elimination in mouse embryonic stem (ES)-somatic hybrid cells.
- To investigate the role of specific chromosomes and pluripotency genes in hybrid cell function.
Main Methods:
- Development of a universal chromosome elimination cassette (CEC) technology.
- Application of CEC for targeted elimination of specific chromosomes (11, 12, or 6) from hybrid cells.
- Analysis of gene expression, particularly Nanog, in relation to pluripotency.
Main Results:
- Demonstrated successful targeted elimination of single chromosomes (11 or 12) and both copies of chromosome 6.
- Chromosome 6 elimination removed pluripotency-associated genes, including Nanog.
- Hybrid cell pluripotency was linked to Nanog expression from reprogrammed somatic cell nuclei.
Conclusions:
- The developed CEC technology enables precise genomic engineering of stem cells.
- Targeted chromosome elimination can be used to study the function of specific genomic regions and genes.
- Reprogrammed somatic cell gene expression, such as Nanog, is critical for maintaining hybrid cell pluripotency.
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