マノース結合レクチンの抑制は,後発血性心筋再注射損傷を減少させます
J E Jordan1, M C Montalto, G L Stahl
1Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
Circulation
|September 19, 2001
まとめ
レクチン補充経路は心臓発作時に活性化され,組織損傷を引き起こします. この経路を抗体で阻害すると,炎症と免疫細胞の浸透を減らすことで心臓を保護します.
科学分野:
- 免疫学 免疫学とは
- 心血管生物学 心血管生物学
- 補足システムシステムです.
背景:
- 補完系は,生まれつきの免疫と適応性免疫において極めて重要であり,従来の免疫,代替免疫,レクチン免疫の3つの活性化経路がある.
- 補完系がイシュケミア・リパーフュージョン損傷における役割は知られているが,レクチン経路の特定の関与は不明である.
研究 の 目的:
- 筋動脈不全-再流出損傷におけるレクチン補充経路の役割を調査する.
- 心臓発作のラットモデルにおけるレクチン経路の阻害による治療の可能性を評価する.
主な方法:
- ネズミのマンノース結合レクチン (rMBL) に対してモノクローナル抗体 (mAbs) が生成されました.
- mAbsの抑制能力は,ミオカルディアス発血不全-再注血 (冠動脈閉塞に続く再注血) のラットモデルを使用して,インビトロおよびインビボで評価されました.
- 測定には,補足C3の堆積,クリエチンキナーゼの損失,心臓発作の大きさ,中性粒子の浸透,および炎症性遺伝子の発現が含まれていた.
主要な成果:
- 1 mAb (P7E4) は,レクチン経路を in vitro および in vivo で効果的に抑制しました.
- P7E4治療は,コンプレメントC3の蓄積,心筋損傷 (クレアチンキナーゼの損失,心臓発作のサイズ),および心臓における中性粒子の浸透を,ポストイシュミア-再注射で著しく減少させた.
- P7E4はまた,細胞間粘着分子-1,血管細胞粘着分子-1,およびインタールイキン-6.6を含む主要な炎症性遺伝子の発現を弱めた.
結論:
- レクチン補充経路は,心筋不全-再注射の間に活性化され,組織損傷に寄与します.
- レクチン経路を阻害mAbsで遮断すると,中性粒子の浸透を軽減し,炎症反応を減少させることで,心臓保護を提供します.
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