Neuropilin-1是T細胞記憶檢查點
作者:
小柯機器人發布時間:2020/7/16 15:00:31
美國匹茲堡大學Dario A. A. Vignali團隊的研究發現Neuropilin-1是T細胞記憶檢查點,可限制長期抗腫瘤免疫力。這一研究成果於2020年7月13日在線發表在《自然—免疫學》上。
研究人員發現,在具有CD8+T細胞限制的Neuropilin-1(NRP1)缺失小鼠中,儘管原發性腫瘤的生長未發生改變,但對腫瘤再發的保護作用顯著增強,並且對抗PD1免疫療法的敏感性增強。從機制上講,NRP1從本質上限制了CD44+PD1+TCF1+TIM3-前體耗竭T細胞的自我更新,這與其在T細胞受體再刺激時誘導c-Jun/AP-1表達的能力降低有關。這一機制在野生型荷瘤宿主中可能以記憶分化為代價導致終末T細胞衰竭。
這些數據表明,對NRP1的阻斷(一種獨特的「免疫記憶檢查點」)可能促進長期腫瘤特異性Tmem的發育,這對於持久的抗腫瘤免疫至關重要。
據悉,強大的CD8+T細胞記憶對於長期的保護性免疫至關重要,但在癌症中通常會受到損害,因為T細胞衰竭會導致記憶前體細胞的喪失。利用檢查點抑制的免疫療法可能無法有效逆轉這種缺陷,從而可能導致潛在的疾病復發。
附:英文原文
Title: Neuropilin-1 is a T cell memory checkpoint limiting long-term antitumor immunity
Author: Chang Liu, Ashwin Somasundaram, Sasikanth Manne, Angela M. Gocher, Andrea L. Szymczak-Workman, Kate M. Vignali, Ellen N. Scott, Daniel P. Normolle, E. John Wherry, Evan J. Lipson, Robert L. Ferris, Tullia C. Bruno, Creg J. Workman, Dario A. A. Vignali
Issue&Volume: 2020-07-13
Abstract: Robust CD8+ T cell memory is essential for long-term protective immunity but is often compromised in cancer, where T cell exhaustion leads to loss of memory precursors. Immunotherapy via checkpoint blockade may not effectively reverse this defect, potentially underlying disease relapse. Here we report that mice with a CD8+ T cell–restricted neuropilin-1 (NRP1) deletion exhibited substantially enhanced protection from tumor rechallenge and sensitivity to anti-PD1 immunotherapy, despite unchanged primary tumor growth. Mechanistically, NRP1 cell-intrinsically limited the self-renewal of the CD44+PD1+TCF1+TIM3 progenitor exhausted T cells, which was associated with their reduced ability to induce c-Jun/AP-1 expression on T cell receptor restimulation, a mechanism that may contribute to terminal T cell exhaustion at the cost of memory differentiation in wild-type tumor-bearing hosts. These data indicate that blockade of NRP1, a unique 『immune memory checkpoint』, may promote the development of long-lived tumor-specific Tmem that are essential for durable antitumor immunity.
DOI: 10.1038/s41590-020-0733-2
Source: https://www.nature.com/articles/s41590-020-0733-2