新方法揭示TREM2在癌症免疫抑制中的功能
作者:
小柯機器人發布時間:2020/8/13 16:26:47
以色列威茲曼科學研究所Ido Amit和Assaf Weiner團隊合作取得一項新突破。他們利用scRNA-Seq和細胞內蛋白活性的耦合,揭示了TREM2在腫瘤免疫抑制中的功能。相關論文在線發表在2020年8月11日出版的《細胞》雜誌上。
研究人員研發了INs-seq,這是一種用於大規模平行記錄單細胞RNA測序(scRNA-seq)和細胞內蛋白質活性的集成技術。通過分析免疫信號傳導、轉錄因子組合和代謝活性的細胞內差異,研究人員證明了INs-seq在發現新免疫子集方面的廣泛用途。通過對腫瘤模型中表達精氨酸酶1細胞(具有抑制活性的代謝免疫信號)的全面分析,研究人員發現了新型Arg1+ Trem2+調節性髓樣(Mreg)細胞,並鑑定了分子標記、代謝活性和與這些細胞相關的通路。
在小鼠中利用遺傳方法敲出Trem2抑制了腫瘤內Mreg細胞的積累,導致功能異常CD8+ T細胞顯著減少,並抑制腫瘤生長。這項研究表明INs-seq是可用於闡明整合轉錄和細胞內圖譜的廣泛應用技術,並鑑定了腫瘤中髓樣抑制細胞的分子標記。
據了解,細胞功能和活性受到信號傳導、表觀遺傳、轉錄和代謝途徑的整合調控。
附:英文原文
Title: Coupled scRNA-Seq and Intracellular Protein Activity Reveal an Immunosuppressive Role of TREM2 in Cancer
Author: Yonatan Katzenelenbogen, Fadi Sheban, Adam Yalin, Ido Yofe, Dmitry Svetlichnyy, Diego Adhemar Jaitin, Chamutal Bornstein, Adi Moshe, Hadas Keren-Shaul, Merav Cohen, Shuang-Yin Wang, Baoguo Li, Eyal David, Tomer-Meir Salame, Assaf Weiner, Ido Amit
Issue&Volume: 2020-08-11
Abstract: Cell function and activity are regulated through integration of signaling, epigenetic,transcriptional, and metabolic pathways. Here, we introduce INs-seq, an integratedtechnology for massively parallel recording of single-cell RNA sequencing (scRNA-seq)and intracellular protein activity. We demonstrate the broad utility of INs-seq fordiscovering new immune subsets by profiling different intracellular signatures ofimmune signaling, transcription factor combinations, and metabolic activity. Comprehensivemapping of Arginase 1-expressing cells within tumor models, a metabolic immune signatureof suppressive activity, discovers novel Arg1+ Trem2+ regulatory myeloid (Mreg) cells and identifies markers, metabolic activity, and pathwaysassociated with these cells. Genetic ablation of Trem2 in mice inhibits accumulationof intra-tumoral Mreg cells, leading to a marked decrease in dysfunctional CD8+ T cells and reduced tumor growth. This study establishes INs-seq as a broadly applicabletechnology for elucidating integrated transcriptional and intra-cellular maps andidentifies the molecular signature of myeloid suppressive cells in tumors.
DOI: 10.1016/j.cell.2020.06.032
Source: https://www.cell.com/cell/fulltext/S0092-8674(20)30809-6
Cell:《細胞》,創刊於1974年。隸屬於細胞出版社,最新IF:36.216