| Project/Area Number |
21F21084
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Single-year Grants |
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| Section | 外国 |
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| Review Section |
Basic Section 44030:Plant molecular biology and physiology-related
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| Research Institution | Utsunomiya University |
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Principal Investigator |
玉田 洋介 宇都宮大学, 工学部, 准教授 (50579290)
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| Co-Investigator(Kenkyū-buntansha) |
GU NAN 宇都宮大学, 工学部, 外国人特別研究員
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| Project Period (FY) |
2021-04-28 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2022: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2021: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Keywords | Stem cell / Reprogramming / Physcomitrium patens / DNA damage / Single-nucleus RNA-seq / snRNA-sequencing |
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| Outline of Research at the Start |
We found that transient DNA damage can induce the reprogramming of differentiated leaf cells into stem cells without wounding and exogenous phytohormones in the moss Physcomitrium patens. This depends on the DNA damage sensor kinase ATR and the reprogramming signal integrators STEMINs. In this project, we will investigate the molecular mechanism of how DNA damage induces STEMIN1 through ATR only in a part of leaf cells. As DNA damage response is conserved in plants and animals, we will also examine whether DNA damage can enhance the reprogramming in other organisms.
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| Outline of Annual Research Achievements |
Our study aimed to understand the molecular mechanism of DNA damage-triggered reprogramming from differentiated leaf cells into stem cells in Physcomitrium patens. To this end, we conducted single cell transcriptome analysis through single nucleus RNA-sequencing (snRNA-seq) to track transcriptional changes during the reprogramming process. We successfully obtained high quality snRNA-seq data. After the clustering of nuclear transcriptomes, we obtained a set of genes which were specifically expressed in each cluster. With fluorescence observation of promoter reporter lines of these specifically expressed genes, multiple clusters were annotated to specific tissues. Based on these cluster annotation results, we can extract the reprogramming trajectory of nuclei from leaf cells to newly formed protonema stem cells. From this analysis, we can identify stage-specific genes during DNA damage-triggered reprogramming and differentially expressed genes between reprogramming and non-reprogramming leaf cells at the late stage, which will provide a potential list of key genes driving the cellular reprogramming.
To explore the universality of DNA damage-triggered reprogramming in land plants, we established culture conditions for multiple angiosperms and treated each plant with Zeocin. In most cases, the DNA damage reagent caused cell death in the tested plants, suggesting that efficient DNA damage repair is critical for successful cellular reprogramming.
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| Research Progress Status |
令和4年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和4年度が最終年度であるため、記入しない。
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