マルファン症候群における大動脈瘤の進行における周周血管炎症
Hiroyuki Sowa1, Hiroki Yagi1, Kazutaka Ueda1
1Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
JCI insight
|August 28, 2025
まとめ
周血管炎症はマーファン症候群 (MFS) の大動脈の膨張に寄与する. 低用量ピタバスタチンは炎症と大動脈拡大を抑制し,MFSの血管性イベントの潜在的治療標的を示唆した.
科学分野:
- 心血管生物学
- 炎症に関する研究
- 遺伝 と 病気
背景:
- 血管疾患は炎症によって大きく影響を受けます
- マルファン症候群 (MFS) は,結合組織に影響する遺伝疾患で,しばしば大動脈の膨張につながります.
- MFSの病原性における周周血管炎症の役割は,まだ完全に解明されていない.
研究 の 目的:
- マルファン症候群に関連した大動脈の膨張における周周周炎症の関与を調査する.
- MFSに関連する血管の炎症と病理の緩和におけるピタバスタチンの治療の可能性を調査する.
- MFS患者の周周脂肪組織 (PVAT) 炎症を評価するための非侵襲的方法を開発する.
主な方法:
- MFS患者およびFbn1C1041G/+マウスの大動脈組織をマクロファージ浸透および炎症性サイトカイン発現のために分析.
- Fbn1C1041G/+のマウスで高脂肪食 (HFD) を用いて代謝性炎症ストレスを誘導する.
- 大動脈中枢の構造的整合性,線維症,およびTGF-β経路の活性化に関する組織学的および分子学的分析.
- 昇動性大動脈周血管脂肪減弱指数 (AA-FAI) を計算するためのCT画像の機械学習ベースの自動分析プログラムの開発と検証.
主要な成果:
- MFS大動脈とFbn1C1041G/+マウスの大動脈は,大きなマクロファージの蓄積と,近大動脈組織における炎症性サイトカインの増加を示した.
- HFDは血管炎症を悪化させ,Fbn1C1041G/+のマウスの大動脈の拡張を加速させ,その効果はピタバスタチンによって抑制された.
- ピタバスタチン治療は,HFDによる構造的変異,弾性繊維の断片化,線維症,プロテオグライカンの蓄積,および大動脈におけるTGF-β経路の活性化を改善した.
- 開発されたAA- FAIツールは,大動脈周脂肪炎と有意な相関を示し,MFS患者では対照群と比較して上昇した.
結論:
- 周周血管炎症は,マーファン症候群における動脈瘤形成の主要な要因である.
- ピタバスタチンのような薬剤で周周炎症を標的とした治療は,MFSに対する新しい治療戦略を提供することができる.
- AA-FAIは,MFS管理のための臨床環境でPVAT炎症を評価するための有望な非侵襲的バイオマーカーとして機能します.
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