EndMTは,脳洞穴性異常の発生と進行に寄与する
Luigi Maddaluno1, Noemi Rudini, Roberto Cuttano
1IFOM Fondazione, FIRC Institute of Molecular Oncology, 20139 Milan, Italy. uigi.maddaluno@ifom.eu
Nature
|June 11, 2013
まとめ
Cerebral cavernous malformation (CCM) は,CCM遺伝子の変異によって引き起こされる脳血管の欠陥を伴うものです. この研究では,TGF-βとBMPのシグナル伝達を阻害することで,内皮からメゼンキマへの移行を防止し,CCM病変の発生を減少させることが明らかになりました.
科学分野:
- 血管生物学 血管生物学とは
- 遺伝学 遺伝学とは
- セルラー・シグナリング
背景:
- 脳の洞穴変形 (CCM) は,人口の0.5%までに影響し,異常な血管による脳出血を引き起こします.
- CCMは,CCM1,CCM2,またはCCM3遺伝子の機能喪失変異の結果である.
- CCMタンパク質複合体の in vivo 機能は完全に理解されていません.
研究 の 目的:
- CCM1遺伝子の脳洞性異常発症における役割を調査する.
- CCMの病原性に基づく細胞メカニズムを解明する.
- CCM病の潜在的治療標的を特定する.
主な方法:
- Ccm1遺伝子の内皮特異的なデリレーションを持つマウスを生成した.
- ネズミの脳における血管異常と細胞変化を分析した.
- 内皮からメゼンキマへの移行 (EndMT) とシグナル伝達経路 (TGF-β,BMP) の関与を調査した.
- TGF-βおよびBMP経路阻害剤の有効性をin vitroおよびin vivoでテストしました.
主要な成果:
- Ccm1の内皮特異的破壊はEndMTを誘発し,血管異常に寄与する.
- Ccm1剥離された細胞におけるエンドMTは,TGF-βとBMPシグナル伝達を活性化する上調BMP6によって媒介された.
- TGF-βとBMP経路を阻害すると,EndMTが減少し,CCM1欠乏したマウスの血管病変の数とサイズが減少しました.
結論:
- 増加したTGF-βとBMPのシグナル伝達 EndMTをCCM1欠乏の内皮細胞で駆動し,CCMの発達を促進します.
- TGF-βとBMP経路を標的にすることは,脳洞穴性異常に対する新しい治療戦略を提供します.
- この研究は,CCM疾患の分子機構に関する重要な洞察を提供します.
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