白血病細胞におけるLILRB4信号は,T細胞抑制と腫瘍浸透を媒介する
Mi Deng1, Xun Gui2, Jaehyup Kim3
1Department of Physiology, University of Texas Southwestern Medical Center, Dallas, TX, USA.
Nature
|October 19, 2018
まとめ
白血病はLILRB4を用いた 免疫療法を回避します 腫瘍の広がりを促進し T細胞を抑制する受容体です LILRB4を阻害することは,単細胞性急性骨髄性白血病 (AML) の治療に有望である.
科学分野:
- 免疫学
- 腫瘍学
- 分子生物学
背景:
- 免疫チェックポイント阻害療法は いくつかの癌には有効ですが,白血病には有効ではありません.
- 白血病は 独特の免疫回避メカニズムを持っているかもしれません
- 白血病細胞の免疫抑制受容体は 腫瘍促進信号を発信する可能性があります
研究 の 目的:
- 単細胞性白血病における LILRB4 の役割を調査する.
- LILRB4が白血病の進行と免疫抑制に影響を与えるシグナル伝達経路を解明する.
主な方法:
- マウスモデルとヒトの白血病細胞を用いました
- APOE,SHP-2,UPAR,ARG1を含む LILRB4信号経路を分析した.
- LILRB4の消去と抗体阻害が白血病の発生に与える影響を評価した.
主要な成果:
- LILRB4は腫瘍細胞の浸透を促進し,急性骨髄性白血病 (AML) のT細胞活動を抑制する.
- LILRB4経路 (APOE,LILRB4,SHP-2,UPAR,ARG1) は,これらの効果に決定的な役割を果たしています.
- LILRB4の削除またはブロックは,モデルでのAML開発を大幅に阻害しました.
結論:
- LILRB4は,単細胞性白血病の腫瘍侵入と免疫抑制を指揮する.
- LILRB4は免疫抑制の微環境を作り,白血病の進行を促進します.
- LILRB4は,単細胞性AML治療の潜在的な治療標的である.
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