酸化窒素に依存する,一酸化炭素による骨髄原始細胞の動員により,血管損傷後の内皮の修復が促進されます
Barbara Wegiel1, David J Gallo, Kathleen G Raman
1Transplantation Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
Circulation
|January 20, 2010
まとめ
一酸化炭素 (CO) は,内皮細胞 (EC) の増殖と損傷後の血管の修復を加速します. このプロセスは,酸化窒素 (NO) の生成とECの祖先細胞の採用に依存しています.
科学分野:
- 血管生物学 血管生物学とは
- セルラー・シグナリング
- 再生医学は再生医学である.
背景:
- 炭素一酸化物 (CO) は,血管内にある既知の恒常性分子である.
- COは,血管の滑らかな筋肉細胞に抗増殖効果を示し,血管新生手術後の狭窄を予防します.
- COが再エンドセリア化に及ぼす影響は,まだ研究されていない.
研究 の 目的:
- 血管損傷後の内皮細胞 (EC) 増殖および再内皮化に対する一酸化炭素 (CO) の影響を調査する.
- COがECと血管修復に及ぼす作用の基礎となる分子メカニズムを解明する.
主な方法:
- 頸動脈損傷のネズミのモデルが利用されました.
- COはガスまたはCOを放出する分子として投与された.
- インビトロおよびインビボアッセイでは,EC増殖,運動性,および再内皮質形成を評価した.
- RhoA,Akt,および酸化窒素 (NO) 合成酵素を含む分子信号伝達経路を分析した.
- 骨髄由来ECの祖先の動員と徴募は定量化されました.
- 実験は野生型のマウスとeNOSのマウスで行われました.
主要な成果:
- COは,ECの増殖と運動性を in vitro (>50%) で著しく増加させ, in vivo の再エンドセリア化 (4日 vs. 6日) を加速させた.
- COはRhoAを活性化させ,下流のAktのリン酸化を引き起こし,ECによるNO生成を増加させた.
- COは,部分的にNOに依存するレチノブラストーマのリン酸化経由で細胞サイクル進行を促した.
- COは,骨髄由来EC前駆体 (4倍) の動員と損傷部位での堆積を増加させた.
- COはENOSのマウスのEC修復を促すのに失敗し,NOの重要な役割を示しています.
結論:
- 一酸化炭素 (CO) は,内皮細胞 (EC) の増殖と損傷後の血管修復を加速します.
- COの再生効果は,酸化窒素 (NO) の生成に依存しています.
- 骨髄に由来する内皮原始細胞の強化された採用は,CO媒介の血管修復に不可欠です.
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