Three-dimensional spheroids of mesenchymal stem/stromal cells promote osteogenesis by activating stemness and Wnt/β-catenin.

• Material Type: 博士論文
• Title: Three-dimensional spheroids of mesenchymal stem/stromal cells promote osteogenesis by activating stemness and Wnt/β-catenin.
• Author/Editor: Imamura, Ayaka; Kajiya, Hiroshi; Fujisaki, Seiichi; Maeshiba, Munehisa; Yanagi, Tsukasa; Kojima, Hiroshi; Ohno, Jun
• Publication Date: 2020-03-14
• Publication Date (W3CDTF): 2020-03-14
• Alternative Title: Three-dimensional spheroids of mesenchymal stem/stromal cells promote osteogenesis by activating stemness and Wnt/β-catenin.
• Degree grantor/type: 福岡歯科大学
• Date Granted: 2020-03-14
• Date Granted (W3CDTF): 2020-03-14
• Dissertation Number: 甲第317号
• Degree Type: 博士（歯学）
• Conferring No. (Dissertation): 甲第317号
• Text Language Code: eng
• Subject Heading: Bone regeneration; Mesenchymal stem/stromal cells; Three dimension spheroid; Wnt/beta-catenin; Stemness
• Note (General): Mesenchymal stem/stromal cells (MSCs) are multipotent and self-renewal cells that are widely used in regenerative medicine. The culture of three-dimensional (3D) spheroid MSCs more accurately mimics the biological microenvironment. However, it is unclear which key molecules are responsible for the cell fate control of MSCs during 3D spheroid formation and their impact on the functional characteristics of these stem cells. Furthermore, it remains unclear what effects 3D spheroid MSC transplantation has on new bone formation compared with that of 2D monolayer MSCs. We assessed whether the osteogenerative potential of 3D spheroid MSCs is greater than that of 2D monolayer MSCs invitro. In addition, to elucidate the ability of 3D spheroid MSCs to regenerate bone, we examined the effects of transplanting wild-type (WT) or knockout (KO) spheroid MSCs on new bone formation in mice calvarial defect model invitro. The 3D spheroid MSC culture dramatically upregulated into stemness markers compared with the 2D monolayer MSC culture. In contrast, BMP-2 significantly increased the osteogenesis-related molecules in the 3D spheroid MSCs but, in turn, downregulated the stemness markers. BMP-2 activated Smad1/5 together with Wnt/β-catenin in 3D spheroid MSCs. Transplantation of these MSCs into aged mice with calvarial defects promoted new bone formation compared with that of 2D monolayer MSCs. In contrast, transplantation of 3D or 2D β-catenin knockout MSCs induced little new bone formation. The 3D spheroid MSC culture had higher stemness compared with the 2D monolayer MSC culture. The culture of 3D spheroid MSCs rapidly promoted osteoblastogenesis and bone formation through synergistic activation of the Wnt/β-catenin pathway invitro. The transformation of 3D spheroid, but not 2D monolayer, MSCs promoted new bone regeneration invivo. These results indicate that transplantation of 3D spheroid MSCs in regeneration therapy contributes to a shorter regenerative healing process, including new bone formation.; 2019年度; 元資料の権利情報 : CC BY-NC-ND
• Persistent ID (NDL): info:ndljp/pid/11673170; https://dl.ndl.go.jp/pid/11673170
• Collection: 障害者向け資料
• Collection (Materials For Handicapped People:1): テキストデータ
• Collection (particular): 国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文; https://dl.ndl.go.jp/collections/A00014
• Acquisition Basis: 博士論文（自動収集）
• Date Accepted (W3CDTF): 2021-05-20T03:24:30+09:00
• Date Created (W3CDTF): 2020-04-07
• Format (IMT): application/pdf
• Access Restrictions: 国立国会図書館内限定公開
• Service for the Digitized Contents Transmission Service: 図書館・個人送信対象外
• Availability of remote photoduplication service: 可
• Original Material (URI): https://doi.org/10.1016/j.bbrc.2019.12.066
• Periodical Title (URI): http://id.nii.ac.jp/1167/00000093/
• Data Provider (Database): 国立国会図書館 : 国立国会図書館デジタルコレクション; https://dl.ndl.go.jp