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表达LMP1特异性嵌合抗原受体的T细胞在体外和体内均介导针对LMP1阳性鼻咽癌细胞的抗肿瘤作用。

T cells expressing a LMP1-specific chimeric antigen receptor mediate antitumor effects against LMP1-positive nasopharyngeal carcinoma cells in vitro and in vivo.

作者信息

Tang Xiaojun, Zhou Yan, Li Wenjie, Tang Qi, Chen Renjie, Zhu Jin, Feng Zhenqing

机构信息

Department of Pathology, Nanjing Medical University, Nanjing, Jiangsu 210029, China. ; The Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing, Jiangsu 210029, China.

Department of Oncology, Ao Yang Hospital, Zhangjiagang, Jiangsu 215617, China.

出版信息

J Biomed Res. 2014 Nov;28(6):468-75. doi: 10.7555/JBR.28.20140066. Epub 2014 Dec 1.

Abstract

T cells modified with chimeric antigen receptor are an attractive strategy to treat Epstein-Barr virus (EBV) associated malignancies. The EBV latent membrane protein 1 (LMP1) is a 66-KD integral membrane protein encoded by EBV that consists of transmembrane-spanning loops. Previously, we have identified a functional signal chain variable fragment (scFv) that specifically recognizes LMP1 through phage library screening. Here, we constructed a LMP1 specific chimeric antigen receptor containing anti-LMP1 scFv, the CD28 signalling domain, and the CD3ζ chain (HELA/CAR). We tested its functional ability to target LMP1 positive nasopharyngeal carcinoma cells. HELA/CAR cells were efficiently generated using lentivirus vector encoding the LMP1-specific chimeric antigen receptor to infect activated human CD3+ T cells. The HELA/CAR T cells displayed LMP1 specific cytolytic action and produced IFN-γ and IL-2 in response to nasopharyngeal carcinoma cells overexpressing LMP1. To demonstrate in vivo anti-tumor activity, we tested the HELA/CAR T cells in a xenograft model using an LMP1 overexpressing tumor. Intratumoral injection of anti-LMP1 HELA/CAR-T cells significantly reduced tumor growth in vivo. These results show that targeting LMP1 using HELA/CAR cells could represent an alternative therapeutic approach for patients with EBV-positive cancers.

摘要

经嵌合抗原受体修饰的T细胞是治疗与爱泼斯坦-巴尔病毒(EBV)相关恶性肿瘤的一种有吸引力的策略。EBV潜伏膜蛋白1(LMP1)是一种由EBV编码的66-kD整合膜蛋白,由跨膜环组成。此前,我们通过噬菌体文库筛选鉴定出一种能特异性识别LMP1的功能性信号链可变片段(scFv)。在此,我们构建了一种包含抗LMP1 scFv、CD28信号结构域和CD3ζ链的LMP1特异性嵌合抗原受体(HELA/CAR)。我们测试了其靶向LMP1阳性鼻咽癌细胞的功能能力。使用编码LMP1特异性嵌合抗原受体的慢病毒载体感染活化的人CD3+ T细胞,高效产生了HELA/CAR细胞。HELA/CAR T细胞表现出LMP1特异性细胞溶解作用,并在接触过表达LMP1的鼻咽癌细胞时产生IFN-γ和IL-2。为了证明体内抗肿瘤活性,我们在使用过表达LMP1的肿瘤的异种移植模型中测试了HELA/CAR T细胞。瘤内注射抗LMP1 HELA/CAR-T细胞显著降低了体内肿瘤生长。这些结果表明,使用HELA/CAR细胞靶向LMP1可能为EBV阳性癌症患者提供一种替代治疗方法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a830/4250525/0425970c972d/jbr-28-06-468-g001.jpg

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