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血管内核因子-kBに依存した動脈形成と分岐の調節
Daniela Tirziu1, Irina M Jaba, Pengchun Yu
1Section of Cardiovascular Medicine, Yale University School of Medicine, New Haven, CT 06520-8017, USA.
Circulation
|October 24, 2012
まとめ
核因子-カッパB (NFκB) は血管の発達を調節する. NFκBを阻害すると,過剰な分岐と不成熟の血管が発生し,組織 perfusion とネットワークの複雑さに影響を及ぼします.
科学分野:
- 心血管生物学 心血管生物学
- 分子生物学は分子生物学である.
- 発達生物学 発達生物学について
背景:
- 動脈形成と副次形成は,調整された血管の発達を含む複雑なプロセスです.
- これらの血管系プロセスを支配する重要な調節因子は,ほとんど未定のままである.
研究 の 目的:
- 動脈形成と付随形成の調節における核因子-カッパB (NFκB) の役割を調査する.
- NFκBが血管ネットワークの発達と成熟に影響を与える分子メカニズムを解明する.
主な方法:
- NFκB活性化阻害剤 (IκBαSR) と内皮特異的誘導性プロモーターを用いた.
- 発達,成人,およびインビトロ環境における内皮のNFκB活性化の選択的抑制.
- 粘着分子発現,単細胞流入,HIF-1α,DLL4/Notchシグナル伝達を含む分子変化を分析した.
主要な成果:
- NFκBの阻害は,不成熟な血管と不十分な perfusion を伴う過剰に分岐した動脈ネットワークにつながりました.
- NFκB抑制は,粘着分子,単細胞の流入,低酸素誘導因子-1α (HIF-1α),およびδ型リガンド4 (DLL4) の発現を減少させた.
- DLL4発現の減少はNotchシグナル伝達を阻害し,血管の分岐が増加した;ジャッジ-1ペプチド治療はネットワークのサイズを正常化しました.
結論:
- NFκBは,発達期と成人期の両方の動脈形成と付随形成の重要な調節体として特定されています.
- NFκBは,HIF-1α依存のVEGF-AとPDGF-BBの発現を調節することによって,血管ネットワークの発達と成熟を制御する.
- また,NFκBはDLL4発現を調節し,それによって動脈連鎖ネットワークのサイズと複雑さを決定する.
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