血管新生依存とインディペンデントな段階のインティマル・ハイパープラジア
Rohit Khurana1, Zhenwu Zhuang, Shalini Bhardwaj
1Centre for Cardiovascular Biology and Medicine, Department of Medicine, University College, London, UK.
Circulation
|October 13, 2004
まとめ
アドベンチアル血管新生は,動脈硬化や静止病のような血管疾患の重要な要因である内密の加厚を刺激します. しかし,このプロセスは加厚を始動するものではありません.
科学分野:
- 血管生物学 血管生物学
- 心血管科学の研究について
- 再生医学は,再生医療である.
背景:
- ネオインティマル血管滑らかな筋肉細胞 (VSMC) の増殖は,動脈硬化症やレステノシスなどの閉塞性血管疾患を誘発する.
- 血管新生は早期のアテロマと関連しているが,VSMCの増殖におけるその役割は不明である.
- 皮膚経由の冠動脈介入は,前進性血管新生を誘導し,ネオインティマ形成におけるその役割の調査を促します.
研究 の 目的:
- 動脈損傷後のネオインティマ形成におけるペリアドベンチチアル血管新生の役割を調査する.
- 血管新生を刺激または阻害することで,ネオインティマルの厚み化に影響されるかどうかを判断する.
主な方法:
- 動脈損傷の2つの動物モデルを使用して,ペリアドベンチチアル血管新生とネオインティマ形成を誘導しました.
- 血管新生は,血管内皮成長因子 (VEGF-A165) またはPR39ペプチドを使用して刺激されました.
- 溶性VEGF受容体1 (sFlt1) または支配負のFGF受容体1 (FGF-R1DN) を使用して血管新生が抑制されました.
主要な成果:
- 動脈損傷は,臨時血管新生とネオインティマ形成の両方を誘発した.
- VEGF-A165またはPR39で血管新生を刺激すると,ネオインティマルの加厚が著しく増加します.
- VEGFまたはFGFのシグナル伝達を阻害することで,血管新生に起因する加厚は減少したが,損傷後の加厚を防ぐことはできなかった.
- 阻害剤は,血管新生成長因子なしでネオインティマルの加厚を防ぐのに効果的ではなかった.
結論:
- アドベンチアル血管新生は,親密な加厚の刺激として作用します.
- 血管新生は親密な加厚のプロセスを開始しません; 他の要因は,その開始に関与しています.
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