IL-7-PD-L1 nano-antibody mediated "zipper" effect augments the tumoricidal activity of tumor-infiltrating lymphocytes.

IF 13.5 1区 医学 Q1 HEMATOLOGY
Zhongjie Yu, Zhen Guo, Bin Jiang, Yueshu Zhu, Lin Shao, Xinhua Zhang, Yi Zhao, Di Wu, Aotian Xu
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Abstract

Cancer represents a pressing global health concern, characterized by a substantial number of unmet clinical needs. Cell therapy has emerged as a promising and efficacious approach for cancer treatment, particularly tumor-infiltrating lymphocytes (TILs), which have demonstrated remarkable improvements in patients' overall survival rates across various clinical studies. However, the tumor microenvironment exerts a adverse effect on TILs, leading to their rapid exhaustion and functional disorder. Consequently, this impedes their ability to effectively eradicate tumors and thus hinders the achievement of the anticipated therapeutic efficacy. Here, we employed lentiviral vector-mediated genetic engineering to manipulate TILs for the expression of TIGIT shRNA, IL-7-PD-L1 nano-antibody fusion protein, and the 'molecular switch' HuEGFRt. The engineered TILs exhibited higher viability, reinforced cell expansion, and reduced reliance on IL-2. The stem-like proportion of engineered TILs is significantly augmented, and their activation level is enhanced when co-cultured with tumor cells. Meanwhile, the engineered TILs exert sustained cytotoxicity after repeated stimulation from tumor cells. The use of Cetuximab has been demonstrated in vitro to induce specific apoptosis of engineered TILs through HuEGFRt, thereby ensuring safety throughout the treatment process. In the mouse tumor model, following infusion of engineered TILs, the tumor volume significantly reduced, once again demonstrating the effectiveness of engineered TILs. The findings of our study demonstrate the exceptional performance of engineered TILs, which undoubtedly holds great promise for the clinical application of engineered TILs, ultimately benefiting a larger population of cancer patients.

IL-7-PD-L1纳米抗体介导的“拉链”效应增强了肿瘤浸润淋巴细胞的杀肿瘤活性。
癌症是一个紧迫的全球健康问题,其特点是大量临床需求未得到满足。细胞疗法已经成为一种有希望和有效的癌症治疗方法,特别是肿瘤浸润淋巴细胞(til),在各种临床研究中已经证明了患者总体生存率的显着提高。然而,肿瘤微环境对til产生不利影响,导致其迅速耗竭和功能紊乱。因此,这阻碍了它们有效根除肿瘤的能力,从而阻碍了预期治疗效果的实现。在这里,我们采用慢病毒载体介导的基因工程来操纵TILs,以表达TIGIT shRNA、IL-7-PD-L1纳米抗体融合蛋白和“分子开关”HuEGFRt。工程TILs表现出更高的活力,增强细胞扩增,减少对IL-2的依赖。工程TILs的茎样比例显著增加,与肿瘤细胞共培养时,其激活水平提高。同时,经过工程修饰的TILs在肿瘤细胞的反复刺激下发挥持续的细胞毒性。西妥昔单抗已在体外通过HuEGFRt诱导工程TILs特异性凋亡,从而确保整个治疗过程的安全性。在小鼠肿瘤模型中,经工程TILs输注后,肿瘤体积明显减小,再次证明了工程TILs的有效性。我们的研究结果证明了工程TILs的卓越性能,这无疑为工程TILs的临床应用带来了巨大的希望,最终使更多的癌症患者受益。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
12.60
自引率
7.30%
发文量
97
审稿时长
6 weeks
期刊介绍: Experimental Hematology & Oncology is an open access journal that encompasses all aspects of hematology and oncology with an emphasis on preclinical, basic, patient-oriented and translational research. The journal acts as an international platform for sharing laboratory findings in these areas and makes a deliberate effort to publish clinical trials with 'negative' results and basic science studies with provocative findings. Experimental Hematology & Oncology publishes original work, hypothesis, commentaries and timely reviews. With open access and rapid turnaround time from submission to publication, the journal strives to be a hub for disseminating new knowledge and discussing controversial topics for both basic scientists and busy clinicians in the closely related fields of hematology and oncology.
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