リポポリサッカリドによって誘発される全身性炎症は,ウサギの風船およびステント損傷後のネオインティマルの形成を増加させます

Haim D Danenberg¹, Frederick G P Welt, Matthew Walker

¹Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA. danen@mit.edu

Circulation

|June 19, 2002

まとめ

動脈損傷中の非特異的な免疫システム刺激は,ネオインティマルの高血症とレステノシスを悪化させる. これは,炎症がこれらの血管疾患の発症に重要な役割を果たしていることを示唆しています.

科学分野:

血管生物学血管生物学とは
免疫学免疫学とは
心血管研究に関する研究です.

背景:

動脈損傷後の炎症反応は,ネオインティマルの高血症および回復症と相関しています.
生まれつきの免疫系の刺激は,血管損傷の結果に影響を与える可能性があります.

研究の目的:

生まれながらの免疫系の刺激が,機械的動脈損傷後の結果に影響するかどうかを調査する.
ネオインティマール・ハイパープラジアの調節におけるリポポリサッカリド (LPS) の役割を調べる.

主な方法:

ウサギは下腹動脈に気球傷を負い,リポポリサッカリド (LPS) の注射を受けた.
系統的炎症マーカー (インタールイキン-1β) と単細胞活性化 (CD14) を測定した.
マクロファージの浸透,光の狭窄,およびネオインティマとミディアの比率は,怪我後の評価された.

主要な成果:

LPS投与は,全身の炎症とCD14単細胞発現を増加させた.
LPSで治療されたウサギは,マクロファージの浸透が著しく増加し,ネオインティマル・ハイパープラジアを示した.
ルミナル狭窄症とネオインティマとミディアの比率は,LPSで治療された動物では著しく高かったが,この効果は,抗-CD14抗体によって廃止された.

結論:

同時に生まれながらの免疫刺激と動脈損傷が進行すると,ネオインティマルの形成が悪化します.
炎症に関連した状態は,血管新生術後の回復症候群のリスクを高める可能性があります.

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