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2018 Fiscal Year Final Research Report

application of induced mesenchymal stem cells from human iPS cells to cell therapy in muscular dystrophy

Research Project

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Project/Area Number 16K08725
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Experimental pathology
Research InstitutionNational Center of Neurology and Psychiatry

Principal Investigator

Suzuki Yuko  国立研究開発法人国立精神・神経医療研究センター, 神経研究所 遺伝子疾患治療研究部, 室長 (00342931)

Co-Investigator(Kenkyū-buntansha) 武田 伸一  国立研究開発法人国立精神・神経医療研究センター, その他部局等, 部長 (90171644)
Research Collaborator Takemura Fusako  
Project Period (FY) 2016-04-01 – 2019-03-31
Keywords間葉系幹細胞 / 筋ジストロフィー / 再生 / 移植治療 / 筋前駆細胞
Outline of Final Research Achievements

Mesenchymal stem cells (MSCs) may improve the efficiency of transplantation of myogenic cells into dystrophic muscle, because they have anti-inflammatory and immunomodulatory properties, protect cells from apoptosis, and secrete factors which support muscle growth. We induced MSCs (iMSC) from hiPSCs. FACS revealed that iMSC express MSC markers, CD73, CD90 and CD105. iMSC could be induced to differentiate into osteogenic, chondrogenic, and adipogenic cells.iMSCs showed higher proliferative potential than human bone marrow-derived MSCs (BM-MSC). Both MSCs promoted the differentiation of human myoblasts, when co-cultured by using the transwell, suggesting that MSCs secrete soluble factors which promote muscle differentiation. Unexpectedly, co-transplantation of iMSC with hiPSC-derived myogenic cells into immuno-deficient DMD model mice did not produce dystrophin-positive myofibers. The factors which inhibit differentiation of hiPSC-derived myogenic cells in vivo remain to be clarified.

Free Research Field

筋ジストロフィーの再生医療

Academic Significance and Societal Importance of the Research Achievements

筋ジストロフィーにおいては骨格筋線維が変性・壊死し、それを再生する組織幹細胞である筋衛星細胞の機能も病気の進行に伴い低下してくる。その一因として、骨格筋の間葉系前駆細胞の機能の低下があると言われている。我々はヒトiPS細胞から誘導した間葉系前駆細胞がヒト多能性幹細胞(iPS細胞)から誘導した筋前駆細胞の筋分化をin vitroにおいて促進することを明らかにした。今後は共移植に用いることで、その治療用細胞としての有用性と安全性を示すとともに、骨格筋の恒常性維持及び筋ジストロフィーの分子病態における間葉系前駆細胞の機能も明らかにしていく予定である。

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Published: 2020-03-30  

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