Foxc1は,血液形成性幹細胞/祖先細胞のニッチ形成の重要な調節体です
Yoshiki Omatsu1, Masanari Seike1, Tatsuki Sugiyama1
11] Department of Immunobiology and Hematology, Institute for Frontier Medical Sciences, Kyoto University, Japan [2] Japan Science and Technology Agency (JST), Core Research for Evolutional Science and Technology (CREST), 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
Nature
|March 5, 2014
まとめ
転写因子Foxc1は,骨髄における造血幹細胞のニッチを維持するために重要である. Foxc1を削除すると,ニッチ形成が妨げられ,幹細胞が減少し,骨髄における脂肪の蓄積が促進されます.
科学分野:
- 血液学 ヘマトロジ
- 幹細胞生物学 幹細胞生物学
- 発達生物学 発達生物学とは
背景:
- 造血幹細胞と原始細胞 (HSPCs) は,骨髄の特殊なニッチに宿っている.
- CXCL12豊富な網膜細胞 (CAR) を含むメゼンキマ原産体は,重要なニッチコンポーネントである.
- ニッチ形成を制御する分子機構は,まだ完全に理解されていない.
研究 の 目的:
- 転写因子Foxc1がメゼンキマ幹細胞のニッチの発達と維持における役割を調査する.
- ニッチ形成の分子基盤とそのHSPC規制への影響を解明する.
主な方法:
- マウスの骨髄におけるFoxc1の遺伝子削除モデル (胚性および誘導性) を利用した.
- 骨髄の細胞性,アディポゲネシス,および重要なニッチ因子の発現 (CXCL12,SCF) を分析した.
- 血液形成性幹細胞と原始細胞の集団を評価し,その維持をin vivoで行いました.
主要な成果:
- Foxc1は,HSPCのメンテナンスに不可欠なCAR細胞で好ましく発現します.
- Foxc1の削除は,HSPCの減少,正常な骨質芽細胞,しかし脂肪細胞 (黄髄) の増加につながった.
- 成人における誘導性欠損はHSPCを枯渇させ,CXCL12/SCFを減少させましたが,黄髄の原因ではありませんでした.
結論:
- Foxc1は,メゼンキマニッチの発達と維持の重要なレギュレータです.
- Foxc1は,CARの原始体内のアディポゲネシスを阻害し,ニッチな因子の発現を促進します.
- Foxc1は,HSPCsの骨髄ニッチの構造的および機能的整合性に不可欠です.
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