霊長類とマウスの胚性幹細胞における血管原始細胞の異なる分化運動
Masakatsu Sone1, Hiroshi Itoh, Jun Yamashita
1Department of Medicine and Clinical Science, Kyoto University Graduate School of Medicine, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507 Japan.
Circulation
|April 23, 2003
まとめ
霊長類の胚性幹細胞 (ESCs) から派生した血管原始細胞 (VPCs) は,マウスESCと比較して異なる分化運動を示します. これらの霊長類に由来するVPCは,血管再生療法にとって有望である.
科学分野:
- 幹細胞生物学 幹細胞生物学とは
- 血管生物学 血管生物学とは
- 再生医学は再生医学である.
背景:
- マウスの胚性幹細胞 (ES) から派生した血管原生細胞 (VPC) は,内皮細胞と壁細胞に微分化することができる.
- 以前の研究では,マウスのES細胞におけるVPCとしてVEGF-R2陽性細胞を確立しました.
研究 の 目的:
- 類人猿のES細胞にVPCが存在するかどうかを判断する.
- 類人猿とマウスのES細胞のVPC分化運動を比較する.
主な方法:
- OP9のフィーダー層に培養された未微分化サルのES細胞.
- フローサイトメトリを使用して,VEGF-R2陽性,VE-カデリン陰性細胞を分離しました.
- 特定の培養条件下で,隔離された細胞を内皮細胞と壁細胞に微分化します.
- PECAM1,eNOS,SMA,calponinなどのマーカーを用いて細胞の微分を評価した.
- 3D培養でチューブ形成を評価した.
主要な成果:
- ネズミのES細胞とは異なり,未微分化猿のES細胞はVEGF-R2を発現した.
- 隔離されたVEGF-R2+ VE-カデリン細胞は,PECAM1+,VE-カデリン+,ENOS+内皮細胞に微分化しました.
- これらの細胞はまた,SMA+,カルポニン+壁画細胞に微分化しました.
- 分化細胞は3D培養でチューブ状の構造を形成した.
- VEGF治療は,SMA+細胞に囲まれたPECAM1+細胞の形成を促進しました.
結論:
- 霊長類とマウスのES細胞由来VPC分化運動は異なる.
- VEGF-R2+ VE-カデリン細胞は,霊長類のVPCとして機能する.
- 原始性ES細胞の研究は,血管再生における臨床応用において極めて重要です.
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