第三章では、これらの細胞の分化能をin vitro, in vivoの双方で調査した。ES細胞から三胚葉由来の細胞へ分化させるための培養条件を参考に、培養条件を設定し分化誘導実験を行った。その結果、sphere由来の細胞は神経・筋肉・肝実質細胞などの代表的な三胚葉由来組織細胞へ分化できることが確認された。生体内での分化能と増殖能を検討するために移植実験を行った。Sphereの細胞はPGA上に播種され、2-3日PGA(poliglycolic acid)上に細胞を接着させるために培養した後、NOD/SCIDマウスの皮下に移植した。4-6週間後に移植片を採取し、組織学的、免疫組織化学的に解析を行った。移植後直径3mmほどのカプセル化した塊を形成した。内部には上皮、神経、筋肉、管といった三胚葉由来すべての組織形成が確認された。以上の結果から、粉砕処理後にsphereを形成する細胞は、無血清条件下で培養すると、非常に幼弱なタンパク質・遺伝子を発現し、培養系、生体内双方において三胚葉系由来組織への分化能を有することが示された。
(英文)
報文
(1) Haruko Obokata, Masayuki Yamato, Kohji Nishida, Satoshi Tsuneda, and Teruo Okano, "Subcutaneous transplantation of autologous oral mucosal epithelial cell sheets fabricated on temperature-responsive culture dishes", Journal of Biomedical Materials Research: A 86:1088-96. 2007
〇(2) Haruko Obokata, Koji Kojima, Masayuki Yamato, Satoshi Tsuneda, Charles A. Vacanti, “The potential of stem cells in adult tissues representative of the three germ layers.”,Tissue Eng Part A. 2010 in press.
(3) Haruko Obokata, Masayuki Yamato, Kohji Nishida, Satoshi Tsuneda, and Teruo Okano,“Time-course アnalyses of reconstructed ultrastructure change in oral mucosal epithelium cell sheet after subcutaneous transplantation” submitted to Journal of Tissue Engineering and Regenerative Medicine.
(4) Haruko Obokata, Masayuki Yamato, Satoshi Tsuneda, and Teruo Okano, “Protocol for reproducible subcutaneous transplantation of cell sheets” submitted to Nature Protocols.
(5) Haruko Obokata, Masayuki Yamato, Satoshi Tsuneda, and Teruo Okano, “The effectiveness of inflammatory cytokines for regeneration of transplanted cultured keratinocyte cells” submitted to Journal of Investigative Dermatology
(6) Haruko Obokata, Masayuki Yamato, Satoshi Tsuneda, and Teruo Okano, “Hyperacute inflammation アnalyses after subcutaneous transplantation of human fibroblast cell sheets into Lewis rats.”submitted to Xenotransplantation.
報文
(1) Haruko Obokata, Masayuki Yamato, Kohji Nishida, Satoshi Tsuneda, and Teruo Okano, 「温度応答性培養皿上で作製された自己口腔粘膜上皮細胞シートの皮下移植」, Journal of Biomedical Materials Research: A 86:1088-96. 2007
〇(2) Haruko Obokata, Koji Kojima, Masayuki Yamato, Satoshi Tsuneda, Charles A. Vacanti, 「三胚葉各成体組織内在幹細胞の潜在能力」,Tissue Eng Part A. 2010 in press.
(3) Haruko Obokata, Masayuki Yamato, Kohji Nishida, Satoshi Tsuneda, and Teruo Okano,「皮下移植後の口腔粘膜上皮細胞シートにおける再構築された超構造変化の時間経過分析」submitted to Journal of Tissue Engineering and Regenerative Medicine.
(4) Haruko Obokata, Masayuki Yamato, Satoshi Tsuneda, and Teruo Okano, 「細胞シートの再現性ある皮下移植のためのプロトコール」submitted to Nature Protocols.
(5) Haruko Obokata, Masayuki Yamato, Satoshi Tsuneda, and Teruo Okano, 「移植された培養ケラチノサイト細胞再生のための炎症性サイトカインの有効性」submitted to Journal of Investigative Dermatology
(6) Haruko Obokata, Masayuki Yamato, Satoshi Tsuneda, and Teruo Okano, 「ヒト線維芽細胞シートをルイスラットに皮下移植した後の超急性炎症の解析」submitted to Xenotransplantation.
(英文)
講演(海外)
(1) Haruko Obokata, Masayuki Yamato, Kohji Nishida, Satoshi Tsuneda, and Teruo Okano, "Subcutaneous transplantation of autologous oral mucosal epithelial cell sheets fabricated on temperature-responsive culture dishes", Society for Biomaterials 2007 Annual Meeting, Chicago, IL, April 17-21, 2007.
(2) Haruko Obokata, Masayuki Yamato, Kohji Nishida, Satoshi Tsuneda, and Teruo Okano, "Time-course observation of subcutaneous transplanted autologous oral mucosal epithelial cell sheets fabricated on temperature-responsive culture dishes",, The 13th World Congress of International Society for Artificial Organs, IFAO-JSAO Annual Meeting, Osaka, Japan, Jun 28-31, 2007
(3) Haruko Obokata, Masayuki Yamato, Kohji Nishida, Satoshi Tsuneda, and Teruo Okano, "Inflammatory アnalyses of subcutaneously-transplanted human epithelial cell sheets", Termis-AP, Tokyo, Japan, December 3-5, 2007
(4) Koji Kojima, Shohta Kodama, Haruko Obokata, Ana C Paz, Charles A. Vacanti. “Generation of Pneumospheres from Pulmonary Stem Cells.” Termis-NA, San Diego, December 7-10, 2008,
(5) Haruko Obokata, Masayuki Yamato, Kohji Nishida, Satoshi Tsuneda, and Teruo Okano, “Subcutaneous Transplantation of Oral Mucosal Epithelial Cell Sheets Fabricated on Temperature-Responsive Culture Dishes”, TERMIS-WC, Seoul, Korea, August 31- September 3, 2009
講演(海外)
(1) Haruko Obokata, Masayuki Yamato, Kohji Nishida, Satoshi Tsuneda, and Teruo Okano, 「温度応答性培養皿上で作製された自己口腔粘膜上皮細胞シートの皮下移植」, Society for Biomaterials 2007 Annual Meeting, Chicago, IL, April 17-21, 2007.
(2) Haruko Obokata, Masayuki Yamato, Kohji Nishida, Satoshi Tsuneda, and Teruo Okano, 「皮下移植後の口腔粘膜上皮細胞シートにおける再構築された超構造変化の時間経過分析」,, The 13th World Congress of International Society for Artificial Organs, IFAO-JSAO Annual Meeting, Osaka, Japan, Jun 28-31, 2007
(3) Haruko Obokata, Masayuki Yamato, Kohji Nishida, Satoshi Tsuneda, and Teruo Okano, 「皮下移植されたヒト上皮細胞シートの炎症分析」, Termis-AP, Tokyo, Japan, December 3-5, 2007
(4) Koji Kojima, Shohta Kodama, Haruko Obokata, Ana C Paz, Charles A. Vacanti. 「肺幹細胞からの肺炎球の生成」Termis-NA, San Diego, December 7-10, 2008,
(5) Haruko Obokata, Masayuki Yamato, Kohji Nishida, Satoshi Tsuneda, and Teruo Okano,「温度応答性培養皿上で作製された口腔粘膜上皮細胞シートの皮下移植」, TERMIS-WC, Seoul, Korea, August 31- September 3, 2009
(英文)
(6) Haruko Obokata, Masayuki Yamato, Kohji Nishida, Satoshi Tsuneda, and Teruo Okano, “Inflammation アnalyses after Subcutaneous Transplantation of Cell Sheets for a Novel Tissue Engineering Method”, TERMIS-WC, Seoul, Korea, August 31- September 3, 2009
(7) Koji Kojima, Haruko Obokata, Ana C Paz and Charles A. Vacanti. “Generation of Pneumospheres from Pulmonary Stem Cells.” TERMIS-WC, Seoul, Korea, August 31- September 3,2009
(8) Haruko Obokata, Koji Kojima, Masayuki Yamato, Teruhiko Wakayama, Teruo Okano, Satoshi Tsuneda and Charles A. Vacanti, “The potential of stem cells in adult tissues representative of the three germ layers.”TERMIS-NA, Orlando, December 5-9 2010
(9) Koji Kojima, Haruko Obokata, Jason Ross and Charles A. Vacanti. “Autologous Tissue Engineered Trachea with Epithelial Cell Sheets in Ovine Model.” TERMIS-NA, Orlando, December 5-9 2010
(6) Haruko Obokata, Masayuki Yamato, Kohji Nishida, Satoshi Tsuneda, and Teruo Okano, 「新しい組織工学的方法のための細胞シートの皮下移植後の炎症分析」, TERMIS-WC, Seoul, Korea, August 31- September 3, 2009
(7) Koji Kojima, Haruko Obokata, Ana C Paz and Charles A. Vacanti. 「肺幹細胞からの肺炎球の生成」TERMIS-WC, Seoul, Korea, August 31- September 3,2009
(8) Haruko Obokata, Koji Kojima, Masayuki Yamato, Teruhiko Wakayama, Teruo Okano, Satoshi Tsuneda and Charles A. Vacanti, 「三胚葉各成体組織内在幹細胞の潜在能力」TERMIS-NA, Orlando, December 5-9 2010
(9) Koji Kojima, Haruko Obokata, Jason Ross and Charles A. Vacanti. 「羊皮症モデルにおける上皮細胞シートを伴う自己組織化工気管」TERMIS-NA, Orlando, December 5-9 2010