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针对特定位点的N-糖基化B7H3诱导强大的抗瘤免疫力

Yun Huang^1,2, Wen-Qing Zhong¹, Xiao-Yu Yang¹

¹State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China.

Nature communications

|April 14, 2025

概括

在B7H3上特定的N-糖化位点对其细胞表面的存在和功能至关重要. 用像Ab-82这样的抗体向这些糖基化形式可以增强抗瘤免疫力.

科学领域:

免疫学免疫学免疫学
分子生物学分子生物学
葡萄糖生物学葡萄糖生物学

背景情况:

B7H3是一种免疫检查点分子和高度N-糖化膜蛋白.
对于B7H3功能至关重要的特定糖化位点在很大程度上是未知的.

研究的目的:

在B7H3上确定关键的N-糖化位,这对其细胞表面定位和功能至关重要.
调查糖化对B7H3贩运和降解的影响.
评估在癌症免疫治疗中准糖基化B7H3的治疗潜力.

主要方法:

局部导向的突变发生以改变N-糖化位 (N91/309,N104/322).
细胞局部化研究 (ER,戈尔吉,细胞表面).
细胞内膜网关联蛋白质降解 (ERAD) 途径分析.
测试T细胞的增殖和激活.
开发和评估一种新的单克隆抗体 (Ab-82).

主要成果:

在N91/309和N104/322的N-甘氨酸对于B7H3细胞表面定位至关重要.
这些部位的突变导致ER积累和通过ERAD降解.
在N91/309和N104/322的N-糖化对B7H3对T细胞的抑制作用至关重要.
单克隆抗体Ab-82针对糖基化B7H3并通过B7H3内部化诱导抗瘤免疫力.

结论:

特定的N-糖化位点 (N91/309,N104/322) 调节B7H3的流通,稳定性和功能.
用像Ab-82这样的抗体向糖基化B7H3代表了癌症免疫治疗的有希望的策略.

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