内皮プログラム死亡-1リガンド1 (PD-L1) は,心臓におけるCD8+T細胞媒介の損傷を調節する
Nir Grabie1, Israel Gotsman, Rosa DaCosta
1Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.
Circulation
|October 17, 2007
まとめ
心臓内皮細胞にプログラムされた死亡リガンド1 (PD-L1) は,免疫媒介の心臓損傷の制御に不可欠です. PD-L1シグナリングの喪失は,多形態核白血球の炎症を促進することによって,心筋炎を悪化させる.
科学分野:
- 免疫学 免疫学とは
- 心臓病学 心臓病学
- 分子生物学は分子生物学である.
背景:
- プログラム死亡-1 (PD-1) は,免疫反応を調節する抑制受容体です.
- PD-1のリガンドであるPD-L1は,炎症中に心臓内皮細胞に誘発されます.
- 心臓免疫損傷におけるPD-L1の役割は十分に理解されていません.
研究 の 目的:
- 細胞毒性Tリンパ球媒介性心筋炎におけるPD-L1信号伝達の役割を調査する.
- 炎症中の心臓におけるPD-L1の細胞源と機能を決定する.
主な方法:
- マウスにおける心筋炎の誘導.
- PD-L1/L2欠乏したマウスを利用し,抗体を阻害した.
- 分析された免疫細胞の浸透と疾患の重症度.
主要な成果:
- 心臓内皮におけるPD-L1のアップレギュレーションは,インターフェロン-ガンマに依存する.
- PD-L1シグナル伝達またはそのリガンドをブロックすると,致死性心筋炎が発生します.
- 骨髄以外の細胞にPD-L1を投与すると,保護効果が認められた.
- ポリモルフォ核白血球の枯渇は,疾患の悪化を逆転させた.
結論:
- 主に内皮にある心筋PD-L1は,免疫媒介の心臓損傷を制御する上で重要な役割を果たします.
- PD-L1は,心臓における多形態核白血球の炎症を調節する上で重要な役割を果たします.
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