RANTES 血小板による収納は,炎症性および動脈硬化性エンドテリウムにおける単細胞停止を誘発する
P von Hundelshausen1, K S Weber, Y Huo
1Institut für Prophylaxe der Kreislaufkrankheiten, Ludwig-Maximilians-Universität, Munich, Germany.
Circulation
|April 3, 2001
まとめ
血小板は,単細胞が炎症した血管壁に付着するのを助け,炎症と動脈硬化に寄与するキモカインであるRANTESを放出します. 血小板由来のRANTESは,これらの疾患における単細胞徴募の鍵となります.
科学分野:
- 心血管生物学 心血管生物学
- 免疫学 免疫学とは
- 動脈硬化症の研究 動脈硬化症の研究
背景:
- RANTESのような血小板とケモカインは,炎症性および動脈硬化性疾患に関与しています.
- これらの要因は,単細胞と内皮細胞の相互作用に影響を与えます.
研究 の 目的:
- 炎症した内皮に対する単細胞粘着における血小板由来RANTESの役割を調査する.
- 血小板によるRANTESの堆積が,動脈硬化で単細胞の徴集に寄与するかどうかを判断する.
主な方法:
- ELISAと免疫光検査により,RANTES結合を検出する.
- パラレル・ウォール・フロー・チャンバーとビデオ顕微鏡を用いて,単細胞停止を研究する.
- RANTES受容体アンタゴニスト (Met-RANTES) とブロック抗体を用いた抑制研究.
- 動脈硬化症のマウスモデルにおける免疫ヒストケミストリー.
- ネズミの carotid 動脈のex vivo 輸液.
主要な成果:
- トロンビン刺激による血小板は,炎症した内皮にRANTESを固定する.
- 固定されたRANTESは,MET-RANTESまたは抗体によってブロックされた切断抵抗性モノサイト停止を誘発します.
- RANTESの堆積と効果には,内皮の活性化 (例えば,インタールイキン-1βによる) が必要である.
- RANTESは,マウスの頸動脈動脈の動脈硬化性病変に存在しています.
- これらの動脈における単細胞の蓄積は,RANTES受容体を含む.
結論:
- 血小板に由来するRANTESの堆積は,炎症または動脈硬化性エンドテリウムに単細胞の停止を開始します.
- RANTESの血小板配送は,炎症性およびアテロゲン性単細胞の徴募のための新しいメカニズムを表しています.
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