| I. Background | |
| Programmed Cell Death Protein 1 (PD-1)，一种在激活的 T 细胞上表达的受体，与其配 体 PD-L1 和 PD-L2 结合，负向调节免疫反应。 PD-1 配体存在于大多数癌症中，PD-1:PD- L1/2 相互作用会抑制 T 细胞活性，并使癌细胞逃避免疫监视。 PD1/PDL1 信号转导通路是 肿瘤免疫抑制的重要组成部分，可以抑制 T 淋巴细胞的兴奋，增强肿瘤细胞的免疫耐受， 从而实现肿瘤免疫逃逸。PD1 与 PDL1 结合可以减弱 T 细胞介导的免疫监视，导致免疫反 应缺失，甚至导致 T 细胞凋亡。PD1/PDL1 抑制剂可解除抗肿瘤 T 细胞的免疫抑制，从而 导致 T 细胞增殖并渗透到肿瘤微环境中并诱导抗肿瘤反应。PD-1:PD-L1/2 通路还参与调节 自身免疫反应，使这些蛋白质成为多种癌症以及多发性硬化症、关节炎、狼疮和 I 型糖尿 病的有希望的治疗靶点。磷酸酶 SHP2 是 T 细胞功能的关键调节因子，它介导 TCR 下游的激活信号以及 PD-1 下游的抑制信号。 | |
| II. Description | |
PDL1 TCR Activator CHO 细胞作为 PD1 NFAT-Luc Jurkat 细胞的靶细胞，很好的模拟了 体内 PD1&PDL1 的信号转导过程，原理见下图所示。
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| III. Introduction | |
| Host Cell: | CHO-K1 |
| Expressed gene: | PDL1、TCR Activator |
| Stability: | 32 passages (in-house test, that not means the cell line will be instable beyond the passages we tested.) |
| Synonym(s): | Programmed Cell Death 1 Ligand 1, PDL1, PD-L1, B7 homolog 1, B7H1, B7-H1, CD274, PDCD1L1 |
| Freeze Medium: | 90% FBS+10% DMSO |
| Culture Medium: | F12K+10%FBS+2μg/ml puromycin+500μg/ml hygromycin |
| Mycoplasma Testing: | Negative |
| Storage: | Liquid nitrogen |
| Application(s): | Functional(Report Gene) Assay |
| IV. Description of Host Cell Line | |
| Organism: | Cricetulus griseus, hamster, Chinese |
| Tissue: | Ovary |
| Disease: | Hamster Chinese ovary |
| Morphology: | Epitheloid cell |
| Growth Properties: | Adherent |
| Ⅴ. Representative Data | |
Figure 2.Recombinant PDL1/TCR Activator/CHO constitutively expressing PDL1.
Figure 3.Detect Luciferase assay by Ultra Luciferase Detection Kit CBPH0001（we strongly suggest to purchase from Cobioer). Dose response of Anti-PD1 Neutralizing Antibody in PD1 NFAT-Luc Jurkat(C16) with PDL1 TCR Activator CHO(C5).
Figure 4. Detect Luciferase assay by Ultra Luciferase Detection Kit CBPH0001（we strongly suggest to purchase from Cobioer). Dose response of Anti-PDL1 Neutralizing Antibody in PD1 NFAT-Luc Jurkat(C16) with PDL1 TCR Activator CHO(C5)..
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