研究揭示ILC2促進癌症肺部轉移的機制
作者:
小柯機器人發布時間:2020/8/4 21:12:04
英國劍橋大學Timotheus Y. F. Halim研究團隊的最新研究,揭示了在肺部ILC2誘導的先天免疫檢查點機制拮抗NK細胞的抗轉移功能。相關論文發表在2020年8月3日出版的《自然-免疫學》雜誌上。
研究人員發現,肺部駐留2型先天淋巴樣細胞(ILC2s)的激活有效抑制了自然殺傷(NK)細胞介導的先天抗腫瘤免疫,這導致肺轉移和死亡率增加。使用多種肺轉移模型,研究人員發現肺部白介素(IL)-33依賴的ILC2激活主要參與了腫瘤負荷。ILC2誘導的2型先天性炎症伴隨著幹擾素-γ的產生和肺部NK細胞細胞毒性功能的局部抑制。
ILC2依賴的NK細胞抑制是通過一種固有的調節機制實現的,該機制依賴於IL-5誘導的肺嗜酸性粒細胞增多,最終妨礙了NK細胞的代謝適應性。靶向IL-33或IL-5的治療可逆轉NK細胞抑制並減輕肺部癌症負荷。因此,該研究揭示了IL-33和ILC2s通過抑制1型先天性免疫促進腫瘤轉移的機制。
研究人員表示,轉移是造成癌症死亡的主要原因,而肺是常見的受累器官。
附:英文原文
Title: ILC2-driven innate immune checkpoint mechanism antagonizes NK cell antimetastatic function in the lung
Author: Martijn J. Schuijs, Shaun Png, Arianne C. Richard, Anastasia Tsyben, Gregory Hamm, Julie Stockis, Celine Garcia, Silvain Pinaud, Ashley Nicholls, Xavier Romero Ros, Jing Su, Matthew D. Eldridge, Angela Riedel, Eva M. Serrao, Hans-Reimer Rodewald, Matthias Mack, Jacqueline D. Shields, E. Suzanne Cohen, Andrew N. J. McKenzie, Richard J. A. Goodwin, Kevin M. Brindle, John C. Marioni, Timotheus Y. F. Halim
Issue&Volume: 2020-08-03
Abstract: Metastasis constitutes the primary cause of cancer-related deaths, with the lung being a commonly affected organ. We found that activation of lung-resident group 2 innate lymphoid cells (ILC2s) orchestrated suppression of natural killer (NK) cell-mediated innate antitumor immunity, leading to increased lung metastases and mortality. Using multiple models of lung metastasis, we show that interleukin (IL)-33-dependent ILC2 activation in the lung is involved centrally in promoting tumor burden. ILC2-driven innate type 2 inflammation is accompanied by profound local suppression of interferon-γ production and cytotoxic function of lung NK cells. ILC2-dependent suppression of NK cells is elaborated via an innate regulatory mechanism, which is reliant on IL-5-induced lung eosinophilia, ultimately limiting the metabolic fitness of NK cells. Therapeutic targeting of IL-33 or IL-5 reversed NK cell suppression and alleviated cancer burden. Thus, we reveal an important function of IL-33 and ILC2s in promoting tumor metastasis via their capacity to suppress innate type 1 immunity. Pathological group 2 innate lymphoid cells (ILC2s) have mainly been implicated in allergy. Halim and colleagues demonstrate that ILC2s orchestrate a prometastatic pathway via the recruitment of eosinophils that suppress NK cell function.
DOI: 10.1038/s41590-020-0745-y
Source: https://www.nature.com/articles/s41590-020-0745-y