Bispecific Antibody PD-L1 x CD3 Boosts the Anti-Tumor Potency of the Expanded Vγ2Vδ2 T Cells.

Bispecific Antibody PD-L1 x CD3 Boosts the Anti-Tumor Potency of the Expanded Vγ2Vδ2 T Cells.
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双特异性抗体 PD-L1 x CD3 增强扩增的 Vγ2Vγ2 T 细胞的抗肿瘤效力

DOI:
10.3389/fimmu.2021.654080
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发表时间:
2021
影响因子:
7.3
通讯作者:
Zhou P
Zhou P
中科院分区:
医学2区
文献类型:
--
作者:
Yang R;Shen S;Gong C;Wang X;Luo F;Luo F;Lei Y;Wang Z;Xu S;Ni Q;Xue Y;Fu Z;Zeng L;Fang L;Yan Y;Zhang J;Gan L;Yi J;Zhou P

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基于Vγ2Vδ2 T细胞的免疫治疗在临床试验中已使部分患者受益,但对于实体瘤患者总体疗效较低。在这项研究中,针对 PD-L1 和 CD3 (PD-L1 x CD3) 的双特异性抗体 Y111 可以有效地桥接 T 细胞和表达 PD-L1 的肿瘤细胞。 Y111 促进新鲜 CD8+ T 细胞介导的 H358 细胞裂解,但对从同一供体富集的新鲜 Vδ2+ T 细胞没有这种影响,这表明 Y111 可以绕过新鲜 Vγ2Vδ2 T 细胞的抗肿瘤能力。由于扩增的 Vγ2Vδ2 T 细胞的过继转移在临床试验中被批准是安全且耐受性良好的,因此我们假设扩增的 Vγ2Vδ2 T 细胞与 Y111 的组合将提供另一种免疫治疗方法。在 PD-L1 阳性肿瘤细胞存在的情况下,Y111 以剂量依赖性方式诱导扩增的 Vγ2Vδ2 T 细胞的激活。此外,Y111 通过在体外释放颗粒酶 B、IFNγ 和 TNFα,增加了扩增的 Vγ2Vδ2 T 细胞对各种 NSCLC 衍生肿瘤细胞系的细胞毒性。同时,过继转移的Vγ2Vδ2 T细胞与Y111一起抑制NPG小鼠中已建立的异种移植物的生长。综上所述,我们的数据表明采用 Y111 过继转移 Vγ2Vδ2 T 细胞治疗 PD-L1 阳性实体瘤具有临床潜力。
Vγ2Vδ2 T cell-based immunotherapy has benefited some patients in clinical trials, but the overall efficacy is low for solid tumor patients. In this study, a bispecific antibody against both PD-L1 and CD3 (PD-L1 x CD3), Y111, could efficiently bridge T cells and PD-L1 expressing tumor cells. The Y111 prompted fresh CD8+ T cell-mediated lysis of H358 cells, but spared this effect on the fresh Vδ2+ T cells enriched from the same donors, which suggested that Y111 could bypass the anti-tumor capacity of the fresh Vγ2Vδ2 T cells. As the adoptive transfer of the expanded Vγ2Vδ2 T cells was approved to be safe and well-tolerated in clinical trials, we hypothesized that the combination of the expanded Vγ2Vδ2 T cells with the Y111 would provide an alternative approach of immunotherapy. Y111 induced the activation of the expanded Vγ2Vδ2 T cells in a dose-dependent fashion in the presence of PD-L1 positive tumor cells. Moreover, Y111 increased the cytotoxicity of the expanded Vγ2Vδ2 T cells against various NSCLC-derived tumor cell lines with the releases of granzyme B, IFNγ, and TNFα in vitro. Meanwhile, the adoptive transferred Vγ2Vδ2 T cells together with the Y111 inhibited the growth of the established xenografts in NPG mice. Taken together, our data suggested a clinical potential for the adoptive transferring the Vγ2Vδ2 T cells with the Y111 to treat PD-L1 positive solid tumors.
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