| Project/Area Number |
18H02982
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 57040:Regenerative dentistry and dental engineering-related
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| Research Institution | Osaka University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
竹立 匡秀 大阪大学, 歯学部附属病院, 講師 (60452447)
村上 伸也 大阪大学, 歯学研究科, 教授 (70239490)
山下 元三 大阪大学, 歯学部附属病院, 講師 (90524984)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2020: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
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| Keywords | 歯周組織再生 / ステムセルエイジング / 歯根膜細胞 |
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| Outline of Final Research Achievements |
In this study, elucidating the aging mechanism of periodontal ligament stem cells at the molecular level, we investigated the possibility that aging control of stem cells enhances the effect of periodontal tissue regeneration. As a result, the analysis of the miRNA expression profile during the aging process of periodontal ligament cells revealed a relationship between the increased expression of miRNA-137 and the genes involved in delaying the processing of damaged mitochondria in the aged periodontal ligament cells. Furthermore, since a significant decrease in the expression of these genes was observed in periodontal ligament cells into which artificial microRNA-mimicking strands having a sequence homologous to miRNA-137 were introduced, it was suggested that the control of stem cell aging may enhance the regeneration effect of periodontal tissue.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究により、miRNA-137と損傷ミトコンドリアの処理過程の遅延に関与する遺伝子群との関連性が明らかとなり、幹細胞のエネルギー代謝の中心となるミトコンドリア代謝の調節経路の異常が歯根膜細胞のステムセルエイジングに関与する可能性が示唆された。そして、miRNA-137などの人工microRNA模倣鎖を導入した歯根膜細胞において、損傷ミトコンドリアの標識と隔離膜への囲い込みに関与する遺伝子群の有意な発現減少が認められたことから、これらのmiRNAsを標的とするマイトファジー制御を基盤とする核酸治療薬がステムセルエイジング制御に有用である可能性が示唆された。
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