晚期卵巢癌的腫瘤免疫異質性揭示出化療的免疫原性作用
作者:
小柯機器人發布時間:2020/6/2 20:42:40
英國劍橋大學Martin L. Miller研究組的最近工作表明,晚期卵巢癌的腫瘤免疫異質性揭示出化療的免疫原性作用。相關論文於2020年6月1日在線發表於《自然—遺傳學》。
為了表徵高級別漿液性卵巢癌(HGSOC)在新輔助化療(NACT)前後的腫瘤-免疫界面,研究人員對化療前後的未經治療和配對樣品進行了免疫基因組分析。在未進行過治療的HGSOC中,研究人員發現免疫細胞排斥和炎性微環境共存於同一個體和同一腫瘤部位內,表明免疫細胞浸潤無處不在。
腫瘤微環境細胞組成、DNA拷貝數、突變和基因表達的分析表明,免疫細胞排斥與未治療HGSOC中Myc靶基因的擴增和經典Wnt信號表達的增加有關。NACT之後,自然殺傷細胞浸潤的增加以及T細胞的寡克隆擴增被檢測到。
研究人員證明,晚期HGSOC的腫瘤免疫微環境在本質上是異質的,化學療法可誘導局部免疫激活,這表明化學療法可以增強免疫排斥型HGSOC腫瘤的免疫原性。
據了解,在轉移性癌症中,腫瘤微環境及其分子基礎的異質性程度仍未得到充分研究。
附:英文原文
Title: Unraveling tumor–immune heterogeneity in advanced ovarian cancer uncovers immunogenic effect of chemotherapy
Author: Alejandro Jimnez-Snchez, Paulina Cybulska, Katherine LaVigne Mager, Simon Koplev, Oliver Cast, Dominique-Laurent Couturier, Danish Memon, Pier Selenica, Ines Nikolovski, Yousef Mazaheri, Yonina Bykov, Felipe C. Geyer, Geoff Macintyre, Lena Morrill Gavarr, Ruben M. Drews, Michael B. Gill, Anastasios D. Papanastasiou, Ramon E. Sosa, Robert A. Soslow, Tyler Walther, Ronglai Shen, Dennis S. Chi, Kay J. Park, Travis Hollmann, Jorge S. Reis-Filho, Florian Markowetz, Pedro Beltrao, Hebert Alberto Vargas, Dmitriy Zamarin, James D. Brenton, Alexandra Snyder, Britta Weigelt, Evis Sala, Martin L. Miller
Issue&Volume: 2020-06-01
Abstract: In metastatic cancer, the degree of heterogeneity of the tumor microenvironment (TME) and its molecular underpinnings remain largely unstudied. To characterize the tumor–immune interface at baseline and during neoadjuvant chemotherapy (NACT) in high-grade serous ovarian cancer (HGSOC), we performed immunogenomic analysis of treatment-naive and paired samples from before and after treatment with chemotherapy. In treatment-naive HGSOC, we found that immune-cell-excluded and inflammatory microenvironments coexist within the same individuals and within the same tumor sites, indicating ubiquitous variability in immune cell infiltration. Analysis of TME cell composition, DNA copy number, mutations and gene expression showed that immune cell exclusion was associated with amplification of Myc target genes and increased expression of canonical Wnt signaling in treatment-naive HGSOC. Following NACT, increased natural killer (NK) cell infiltration and oligoclonal expansion of T cells were detected. We demonstrate that the tumor–immune microenvironment of advanced HGSOC is intrinsically heterogeneous and that chemotherapy induces local immune activation, suggesting that chemotherapy can potentiate the immunogenicity of immune-excluded HGSOC tumors.
DOI: 10.1038/s41588-020-0630-5
Source: https://www.nature.com/articles/s41588-020-0630-5