腫瘤細胞多樣性導致肝癌微環境重編程
作者:
小柯機器人發布時間:2019/10/6 18:27:54
美國國立衛生研究院Xin Wei Wang課題組的最新研究揭示腫瘤細胞的多樣性驅動肝癌微環境重編程。2019年10月3日,國際知名學術期刊《癌細胞》在線發表了這一成果。
研究人員確定了來自19位患者肝癌生物標本的單細胞轉錄組學情況。研究人員發現在腫瘤內部和腫瘤之間的惡性細胞以及腫瘤微環境(TME)的不同情況中,異質性程度不同。令人驚訝的是,轉錄組多樣性較高的腫瘤與患者的整體生存期較差有關。研究人員發現低氧依賴性血管內皮生長因子表達在腫瘤多樣性和TME極化之間的聯繫。此外,來自異質性較高腫瘤的T細胞顯示出較低的溶細胞活性。使用765個肝臟腫瘤的整體基因組和轉錄組譜研究人員發現了一致的結果。這些結果提供了對肝癌多樣化生態系統及其對患者預後的影響的見解。
據悉,腫瘤中的細胞多樣性是治療失敗和實體惡性腫瘤致死的關鍵因素。
附:英文原文
Title: Tumor Cell Biodiversity Drives Microenvironmental Reprogramming in Liver Cancer
Author: Lichun Ma, Maria O. Hernandez, Yongmei Zhao, Monika Mehta, Bao Tran, Michael Kelly, Zachary Rae, Jonathan M. Hernandez, Jeremy L. Davis, Sean P. Martin, David E. Kleiner, Stephen M. Hewitt, Kris Ylaya, Bradford J. Wood, Tim F. Greten, Xin Wei Wang
Issue&Volume: 3 October 2019
Abstract: Cellular diversity in tumors is a key factor for therapeutic failures and lethal outcomes of solid malignancies. Here, we determined the single-cell transcriptomic landscape of liver cancer biospecimens from 19 patients. We found varying degrees of heterogeneity in malignant cells within and between tumors and diverse landscapes of tumor microenvironment (TME). Strikingly, tumors with higher transcriptomic diversity were associated with patients worse overall survival. We found a link between hypoxia-dependent vascular endothelial growth factor expression in tumor diversity and TME polarization. Moreover, T cells from higher heterogeneous tumors showed lower cytolytic activities. Consistent results were found using bulk genomic and transcriptomic profiles of 765 liver tumors. Our results offer insight into the diverse ecosystem of liver cancer and its impact on patient prognosis.
DOI: 10.1016/j.ccell.2019.08.007
Source: https://www.cell.com/cancer-cell/fulltext/S1535-6108(19)30375-7