抑制轉錄因子HIF-1α能夠增強NK細胞活性
作者:
小柯機器人發布時間:2020/5/25 21:19:58
德國海德堡大學Adelheid Cerwenka課題組利用單細胞RNA測序發現,抑制轉錄因子HIF-1α能夠增強NK細胞活性。該研究於2020年5月22日在線發表於《免疫》。
研究人員通過使用單細胞RNA測序定義了小鼠腫瘤浸潤性自然殺傷(NK)細胞的轉錄圖譜。NK細胞中Hif1a的條件缺失導致腫瘤浸潤NK細胞中腫瘤生長減少,激活標誌物、效應分子的表達升高以及NF-κB途徑的富集。NF-κB激活和Hif1a-/-NK細胞增強的抗腫瘤活性需要髓樣細胞的白介素18(IL-18)。
利用HIF-1α抑制劑進行擴增培養可增強人類NK細胞的反應。HIF1A的低表達與人腫瘤浸潤NK細胞中IFNG的高表達有關,實體瘤中豐富的NK-IL18-IFNG標記與患者總體生存期增加相關。因此,抑制HIF-1α可釋放NK細胞的抗腫瘤活性,從而用於癌症治療。
據介紹,增強腫瘤中免疫細胞的功能仍然是癌症免疫療法的主要難題。缺氧是實體瘤的常見特徵,細胞可通過上調轉錄因子HIF-1α來適應。
附:英文原文
Title: Single-Cell RNA Sequencing of Tumor-Infiltrating NK Cells Reveals that Inhibition of Transcription Factor HIF-1α Unleashes NK Cell Activity
Author: Jing Ni, Xi Wang, Ana Stojanovic, Qin Zhang, Marian Wincher, Lea Bühler, Annette Arnold, Margareta P. Correia, Manuel Winkler, Philipp-Sebastian Koch, Veronika Sexl, Thomas Hfer, Adelheid Cerwenka
Issue&Volume: 2020-05-22
Abstract: Enhancing immune cell functions in tumors remains a major challenge in cancer immunotherapy.Hypoxia is a common feature of solid tumors, and cells adapt by upregulating the transcriptionfactor HIF-1α. Here, we defined the transcriptional landscape of mouse tumor-infiltratingnatural killer (NK) cells by using single-cell RNA sequencing. Conditional deletionof Hif1a in NK cells resulted in reduced tumor growth, elevated expression of activation markers,effector molecules, and an enriched NF-κB pathway in tumor-infiltrating NK cells.Interleukin-18 (IL-18) from myeloid cells was required for NF-κB activation and theenhanced anti-tumor activity of Hif1a/ NK cells. Extended culture with an HIF-1α inhibitor increased human NK cell responses.Low HIF1A expression was associated with high expression of IFNG in human tumor-infiltrating NK cells, and an enriched NK-IL18-IFNG signature in solid tumors correlated with increased overall patient survival. Thus,inhibition of HIF-1α unleashes NK cell anti-tumor activity and could be exploitedfor cancer therapy.
DOI: 10.1016/j.immuni.2020.05.001
Source: https://www.cell.com/immunity/fulltext/S1074-7613(20)30182-5