| Project/Area Number |
16K10624
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Cardiovascular surgery
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| Research Institution | Nagoya University |
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Principal Investigator |
TERAZAWA Sachie 名古屋大学, 医学部附属病院, 病院講師 (50566990)
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| Co-Investigator(Kenkyū-buntansha) |
大島 英揮 名古屋大学, 医学系研究科, 准教授 (40378188)
成田 裕司 名古屋大学, 医学部附属病院, 講師 (60378221)
諫田 泰成 国立医薬品食品衛生研究所, 薬理部, 部長 (70510387)
藤本 和朗 名古屋大学, 医学部附属病院, 病院講師 (70644665)
緒方 藍歌 名古屋大学, 医学系研究科, 特任助教 (70718311)
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| Project Period (FY) |
2016-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 心筋梗塞 / 心筋再生 / エクソソーム / 間葉系幹細胞 / 心筋細胞 / 抗炎症 / miRNA / microRNA / 心筋再生誘導 / 幹細胞 |
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| Outline of Final Research Achievements |
Several therapeutic strategies using cell-derived exosomes (exo) which have several functions, including anti-inflammatory and immunosuppressive activities have been reported. In this study, to investigate the character of exo which is used for induction of cardiac regeneration, we analyzed proteins and miRNAs in exo derived from cells including mesenchymal stem cells (MSC), fibroblasts (FB), cardiac myocytes (CM) and iPS-derived cardiac myocytes (iCM). Exo derived from each cell was isolated by ultracentrifugation. MSC-exo had 286 kinds of proteins and 526 kinds of miRNAs. Especially, exo derived from MSC, CM, or iCM were expressed miR-146 and miR-210 which are known as anti-apoptosis of cardiac myocytes, and miR-126 and miR-132 which are known as angiogenesis factors. We prepared to inject to the site of myocardial infarction in vivo. However, the amount of exo produced was small, and to establish an efficient culture method to isolate more exo was required.
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| Academic Significance and Societal Importance of the Research Achievements |
エクソソームの性質（膜表面タンパクや包括するmiRNA, mRNA, prtoteinなど）はホスト細胞に依存するため、細胞の種類によって治療効果が異なることが予想される。多くの論文で様々な疾患に対する治療効果が明らかとなっているMSCに加え、線維芽細胞や心筋細胞由来のエクソソームを用いて各性質を比較検討することは、治療に最適なエクソソームを見出すための重要な基礎検討課題であると考える。本研究で得られた成果は、由来細胞により治療効果に差異が生ずる可能性がある。これまでに報告がない本成果は、学術的意義を有すると考える。
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