上昇胸部大動脈動脈瘤における媒体の超plastic 細胞リモデリング
Paul C Y Tang1, Michael A Coady, Constantinos Lovoulos
1Department of Surgery, Yale University School of Medicine, New Haven, CT, USA.
Circulation
|August 24, 2005
まとめ
昇る胸大動脈動脈瘤は,腹部動脈瘤とは異なり,血管滑らかな筋肉細胞 (VSMC) 密度が保たれた中部拡張を伴う. これは,縮ではなく,マトリックス変性および細胞増殖を含む異なるメカニズムを示唆しています.
科学分野:
- 心血管研究 循環器科の研究
- 大動脈疾患の病理生理学
- 血管生物学 血管生物学
背景:
- 昇る胸大動脈動脈瘤 (aTAs) は,しばしば中枢変性に関連しています.
- 広範な血管性滑らかな筋肉細胞 (VSMC) アポプトシスは,腹部大動脈動脈瘤 (aAAs) で観察されています.
- aTAにおけるVSMC損失の役割は不明である.
研究 の 目的:
- 主要な上昇胸部大動脈動脈瘤で中部縮が起こるかどうかを調査する.
- 非ニューリスマ性およびニューリスマ性上昇胸腔大動脈における媒体の細胞およびマトリックス組成を比較する.
主な方法:
- 28の非動脈瘤および29の動脈瘤の昇動胸部大動脈の形態測定分析.
- 血管層の厚さの測定と血管区画面積の計算.
- 構造,タンパク質,トランスクリプトのレベルでの中央細胞およびマトリックス組成の評価.
主要な成果:
- 膨張によるメディアの薄くなりにもかかわらず,動脈動脈瘤では全体的な中間領域が増加しました.
- 血管滑らかな筋肉細胞 (VSMC) 密度は保たれ,細胞性多発症を示した.
- マトリックスタンパク質発現の減少とマトリックス分解の増加が観察され,再構成はより小さな動脈瘤で最も顕著でした.
結論:
- 胸部動脈瘤と腹部動脈瘤の間で,VSMCの生存率と中部縮に関して,光の拡大のメカニズムが異なります.
- 両方の動脈瘤タイプは,共通の病理生理学的特徴としてマトリックス変性をも共有しています.
- aTAsにおけるメディアの超可塑性細胞リモデリングは,壁のストレス増加に対する適応的反応である可能性があります.
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