拮抗炎症表型決定腫瘤的命運和治療反應
作者:
小柯機器人發布時間:2020/11/23 16:44:30
英國曼徹斯特大學Santiago Zelenay研究組發現,拮抗炎症表型決定腫瘤的命運以及對免疫檢查點阻斷的反應。該項研究成果於2020年11月20日在線發表在《免疫》雜誌上。
通過深入研究與小鼠免疫依賴性控制相關的炎性腫瘤微環境(TME),研究人員尋找了癌症抑制性炎症的主要調節因子。研究人員發現,幹擾素產生型自然殺傷(NK)細胞的早期腫瘤內積累誘導TME的重塑,並促進細胞毒T細胞(CTL)介導的腫瘤清除。
從機制上講,腫瘤來源的前列腺素E2(PGE2)對NK細胞上的EP2和EP4受體有選擇性地起作用,阻礙了TME的轉換,並使免疫逃逸成為可能。對人類癌症患者數據集的分析顯示,獨特的炎症性TME表型類似於與小鼠的癌症免疫控制與逃避相關的炎症性TME表型。這使研究人員能夠生成整合了相反炎症因子的基因表達特徵,並預測患者的存活率和對免疫檢查點阻斷的反應。
這些發現確定了與癌症免疫控制相關的腫瘤炎症環境特徵,並建立了預測免疫治療結果的策略。
據悉,炎症可以促進或抑制癌症的進展以及對治療的反應。
附:英文原文
Title: Antagonistic Inflammatory Phenotypes Dictate Tumor Fate and Response to Immune Checkpoint Blockade
Author: Eduardo Bonavita, Christian P. Bromley, Gustav Jonsson, Victoria S. Pelly, Sudhakar Sahoo, Katherine Walwyn-Brown, Sofia Mensurado, Agrin Moeini, Eimear Flanagan, Charlotte R. Bell, Shih-Chieh Chiang, C.P. Chikkanna-Gowda, Neil Rogers, Bruno Silva-Santos, Sebastien Jaillon, Alberto Mantovani, Caetano Reis e Sousa, Nadia Guerra, Daniel M. Davis, Santiago Zelenay
Issue&Volume: 2020-11-20
Abstract: Inflammation can support or restrain cancer progression and the response to therapy. Here, we searched for primary regulators of cancer-inhibitory inflammation through deep profiling of inflammatory tumor microenvironments (TMEs) linked to immune-dependent control in mice. We found that early intratumoral accumulation of interferon gamma (IFN-γ)-producing natural killer (NK) cells induced a profound remodeling of the TME and unleashed cytotoxic T cell (CTL)-mediated tumor eradication. Mechanistically, tumor-derived prostaglandin E2 (PGE2) acted selectively on EP2 and EP4 receptors on NK cells, hampered the TME switch, and enabled immune evasion. Analysis of patient datasets across human cancers revealed distinct inflammatory TME phenotypes resembling those associated with cancer immune control versus escape in mice. This allowed us to generate a gene-expression signature that integrated opposing inflammatory factors and predicted patient survival and response to immune checkpoint blockade. Our findings identify features of the tumor inflammatory milieu associated with immune control of cancer and establish a strategy to predict immunotherapy outcomes.
DOI: 10.1016/j.immuni.2020.10.020
Source: https://www.cell.com/immunity/fulltext/S1074-7613(20)30461-1