免疫系统
癌症研究
血小板聚集
化学
机制(生物学)
癌症
自然杀伤细胞
细胞
免疫学
血小板
免疫监视
淋巴瘤
肿瘤微环境
体外
细胞毒性
先天免疫系统
作者
Xiaobing Duan,Haiwen Chen,Xiang Zhou,Pingjuan Liu,Xiao Zhang,Qian Zhu,Ling Zhong,Wanlin Zhang,Shanshan Zhang,Xinyu Zhang,Yanhong Chen,Yan Zhou,Chaopin Yang,Qisheng Feng,Yi-Xin Zeng,Miao Xu,Tong Xiang
出处
期刊:Cancer Research
[American Association for Cancer Research]
日期:2022-01-21
卷期号:82 (6): 1070-1083
被引量:36
标识
DOI:10.1158/0008-5472.can-21-2292
摘要
Nasopharyngeal carcinoma (NPC) and Epstein-Barr virus (EBV)-associated gastric carcinoma (EBVaGC) are two major EBV-associated epithelial malignancies, both of which are characterized by the infiltration of a large number of lymphocytes, including natural killer (NK) cells. Although NK cells can prevent the development of EBV-associated epithelial malignancies, EBV-infected tumor cells often develop resistance to surveillance by NK cells. Elucidating the interactions between NK cells and EBV-infected tumor cells will facilitate the development of more effective NK-mediated therapies for treating EBV-associated malignancies. Here we investigated the cytotoxic function of NK cells in EBV-associated epithelial malignancies and discovered that EBV infection-induced upregulation of F3 expression correlates with NK-cell dysfunction in NPC and EBVaGC. The subsequent inhibitory effect of F3-mediated platelet aggregation on NK-cell function was verified in vitro and in vivo. Mechanistically, EBV latent membrane protein 2A (LMP2A) mediated upregulation of F3 through the PI3K/AKT signaling pathway. In an NPC xenograft mouse model, inhibition of F3 restored the antitumor function of NK cells and showed therapeutic efficacy when administered with NK-cell transfer. On the basis of these findings, EBV infection induces F3-mediated platelet aggregation that inhibits the antitumor function of NK cells, providing a rationale for developing and combining NK-cell-based therapies with F3 inhibitors to treat EBV-associated epithelial malignancies. SIGNIFICANCE: This study reveals a mechanism by which EBV-associated epithelial malignancies escape NK-cell-mediated immune surveillance, providing a new target for improving NK-cell immunotherapy.
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