脂肪酸輸送タンパク質2 がん中の中性粒子を再プログラムする
Filippo Veglia1, Vladimir A Tyurin2, Maria Blasi3
1Immunology, Microenvironment and Metastasis Program, The Wistar Institute, Philadelphia, PA, USA.
Nature
|April 19, 2019
まとめ
脂肪酸輸送タンパク質2 (FATP2) は,多形態核ミエロイド由来抑制細胞 (PMN-MDSC) の免疫抑制機能を駆動する. FATP2を阻害することで,これらの細胞を標的とし,がん治療の有効性を高め,腫瘍の進行を遅らせます.
科学分野:
- 免疫学
- 癌 生物学
- 細胞の代謝
背景:
- ポリモルフォ核ミエロイド系抑制細胞 (PMN-MDSCs) は,がんの免疫回避と治療抵抗に関与する中性細胞である.
- PMN-MDSCの病理的活性化を誘発する正確なメカニズムは,まだ完全に理解されていないため,標的治療戦略を阻害しています.
研究 の 目的:
- PMN-MDSCの免疫抑制機能の背後にある分子メカニズムを解明する.
- PMN-MDSCの選択的な治療標的を特定し,検証する.
主な方法:
- マウスとヒトのPMN-MDSCにおける遺伝子発現の比較分析
- 遺伝的消去と薬学的抑制を用いてPMN-MDSC機能における脂肪酸輸送タンパク質2 (FATP2) の役割を調査した.
- チェックポイント阻害剤との併用療法を含む臨床前モデルの腫瘍進行に対するFATP2調節の影響を評価した.
主要な成果:
- PMN-MDSCは,GM-CSFとSTAT5シグナリングによって制御されるFATP2を独占的にアップレギュレーションします.
- FATP2の消去は,主にアラキドン酸の吸収とプロスタグランジンE2の合成を調節することによって,PMN-MDSC抑制活動を廃止しました.
- 薬理学的なFATP2抑制はPMN- MDSC機能を廃止し,チェックポイント阻害剤と併用すると,腫瘍の成長を著しく遅らせた.
結論:
- FATP2は,PMN-MDSCの免疫抑制性フェノタイプに不可欠である.
- 選択的FATP2抑制は,PMN-MDSCを無効化し,がん免疫療法の結果を高める有望な戦略です.
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