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TIGIT、PVRIG 和 CD96 作为潜在免疫检查点靶标

TIGIT、DNAM-1、CD96 和 PVRIG 信号转导网络

TIGIT、DNAM-1/CD226、CD96 和 PVRIG 是免疫球蛋白超家族 (IgSF) 受体,它们竞争结合 CD155/PVR 和/或 CD112/Nectin-2 配体,但对淋巴细胞的功能介导起相反的作用。DNAM-1/CD226 为共刺激受体,而 TIGIT、PVRIG 和 CD96 均为共抑制受体。有关上述受体、其免疫调节作用及其作为下一代免疫肿瘤学靶标潜力的更多详细信息,请参见以下部分。

Bio-Techne 提供 R&D SystemsTM 生物活性重组蛋白和抗体,用于研究 TIGIT、DNAM-1/CD226、CD96、PVRIG 及其配体之间的相互作用,以及与这些受体相关的免疫调节作用。我们的产品系列包括适用于多个物种的 Fc、His 和 Avi-tag 生物素化重组蛋白,以及经验证可用于多种应用的未标记和荧光染料偶联抗体,包括阻断/中和、流式细胞术、CyTOF、免疫细胞化学/免疫荧光和 Western Blot。 

 

TIGIT、DNAM-1、CD96、PVRIG、VSIG 和 VSTM 家族 - 按分子分类的产品

CD96 CD96v2 CD155/PVR DNAM-1/CD226 Nectin-1/CD111
Nectin-2/CD112 Nectin-3/CD113 PVRIG TIGIT VSIG1
VSIG2 VSIG3 VSIG4 VSIG8 VSIG10
VSIG10L VSTM2A VSTM2B VSTM2L VSTM4

TIGIT、DNAM-1、CD96、PVRIG 信号转导网络的配体-受体相互作用

TIGIT, PVRIG, and CD96 bind to CD112 and/or CD155 and inhibit T cell and natural killer cell functions.

TIGIT、PVRIG、CD96 和 DNAM-1/CD226 蛋白与 CD155/PVR 和/或 CD112 结合,可对淋巴细胞功能产生相反的作用。TIGIT、PVRIG、CD96 和 DNAM-1/CD226 是免疫球蛋白超家族受体,在配体结合后对淋巴细胞功能介导相反的作用。上述所有受体均可结合以下一个或多个连接蛋白或连接蛋白样分子:CD111/Nectin-1、CD112/Nectin-2、 CD113/Nectin-3 和 CD155/PVR,这些分子通常在多种肿瘤中过表达。TIGIT 蛋白与 CD155/PVR、CD112 和 CD113 结合,可抑制 T 细胞和 NK 细胞的活性。相反,DNAM-1/CD226 与 CD155/PVR 和 CD112 结合,可促进 CD8+ T 细胞和 NK 细胞的活性。PVRIG 和 CD96/TACTILE 是其他的 T 细胞和 NK 细胞抑制受体,它们分别与 DNAM-1/CD226 竞争结合 CD112 和 CD155/PVR。尽管已证明 CD155/PVR 和 CD96/TACTILE 之间的相互作用可抑制小鼠的 CD8+ T 细胞和 NK 细胞功能,但这种相互作用能否在人体中介导共抑制作用或共刺激作用,目前仍在研究中。TIGIT 除了在 T 细胞和 NK 细胞上表达外,也可能在肿瘤细胞上表达,并与 T 细胞或 NK 细胞表达的 CD155/PVR 相互作用,导致 T 细胞和 NK 细胞活性降低。

通过 SPR 分析 R&D Systems 人 TIGIT:CD155 蛋白的结合特性

Surface plasmon resonance data showing the affinity measurements and binding kinetics between the CD155 and TIGIT proteins.

通过表面等离子共振 (SPR) 测定 CD155/PVR:TIGIT 蛋白相互作用的亲和力和结合动力学。捕获的 Avi-tag 标签生物素化重组人 CD155/PVR Fc 嵌合体(R&D Systems,目录号 AVI9174)结合重组人 TIGIT His-tag 标签(R&D Systems,目录号 9525-TG)的传感图数据。对应的重叠动力学拟合曲线和残差图显示在下方。重组人 TIGIT His-tag 标签的浓度范围为 0.2 nM 至 400 nM。对应的稳态亲和力拟合曲线显示在最下方。该实验在 GE Healthcare 的 Biacore T200 分析仪上进行。

R&D Systems 重组人 CD155 和 DNAM-1 蛋白结合分析

Analysis of the binding response between R&D Systems Recombinant Human DNAM-1  and Recombinant Human CD155 proteins.

重组人 CD155/PVR 蛋白结合重组人 DNAM-1/CD226 蛋白。链霉亲和素包被孔板 (R&D Systems,目录号 CP004)上将 Avi-tag 标签生物素化重组人 DNAM-1/CD226(R&D Systems,目录号 AVI9298)固定化为 250 ng/mL,并添加指定浓度的重组人 CD155/PVR Fc 嵌合体(R&D Systems,目录号 9174-CD)。重组人 CD155/PVR Fc 嵌合体以 20-100 ng/mL 的 ED50 结合。

R&D Systems 重组人 CD155 和 CD96 蛋白结合分析

Analysis of the binding response between R&D Systems Recombinant Human CD96 and Recombinant Human CD155 proteins.

重组人 CD155/PVR 蛋白与重组人 CD96 蛋白结合。重组人 CD155/PVR Fc 嵌合体(R&D Systems,目录号 9174-CD)固定化为 1 ug/mL,并添加指定浓度的重组人 CD96 Fc 嵌合体(R&D Systems,目录号 9360-CD)。重组人 CD96 Fc 嵌合体以 0.3-1.8 ug/mL 的 ED50 结合。

R&D Systems 重组人 CD112 和 PVRIG 蛋白结合分析

Analysis of the binding response between R&D Systems Recombinant Human PVRIG and Recombinant Human CD112 proteins.

重组人 Nectin-2/CD112 蛋白与重组人 PVRIG 蛋白结合。重组人 PVRIG Fc 嵌合体(R&D Systems,目录号 9365-PV)固定为 1 ug/mL,并添加指定浓度的重组人 Nectin-2/CD112(R&D Systems,目录号 2229-N2)。重组人 Nectin-2/CD112 以 0.4-2.4 ug/mL 的 ED50 结合。

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