针对细胞的PD-1激动剂是强大的NK细胞抑制剂
Harriet C Pope1,2, Ana L Chiodetti1, Alice Newey1
1Immunocore Ltd., Abingdon, United Kingdom.
Frontiers in immunology
|September 8, 2025
概括
一种针对胰腺β细胞的PD-1 (编程细胞死亡蛋白1) 激动剂的新型双特异性分子抑制了NK细胞的活动,为自身免疫性疾病提供了潜在的治疗方法.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 治疗方法 治疗方法
背景情况:
- 编程细胞死亡蛋白1 (PD-1) 是一个关键的免疫检查点,针对癌症和炎症性疾病.
- NK细胞在激活时表达PD-1,它们的功能通过这种途径进行调节.
- PD-1激动剂可以诱导免疫抑制,对炎症状况有益.
研究的目的:
- 开发和评估一种新的双特异性分子,该分子将PD-1激动剂向胰腺β细胞.
- 评估该分子以有针对性的方式抑制NK细胞活动的能力.
主要方法:
- 设计了一种双特异性分子,具有β细胞向域和PD-1agonist效应因子域.
- 通过基因表达,脱粒标记 (CD107a),IFNγ和Granzyme B分泌来评估NK细胞和NK92-PD-1细胞系的激活.
- 还测量了胰腺β细胞的增殖和胰岛素的产生.
主要成果:
- 贝塔细胞与免疫突触局部化的双特异性PD-1agonist分子结合.
- 这种分子改变了NK细胞的基因表达,减少了炎症和细胞毒性功能.
- 没有观察到对β细胞增殖或胰岛素生产的显著影响.
结论:
- 向的PD-1激动分子可以以组织特定的方式抑制T细胞和NK细胞.
- 这种方法为自身免疫和炎症性疾病提供了一个有前途的治疗策略.
- 开发的分子表明,在影响胰腺β细胞的自身免疫疾病中,具有局部免疫抑制的潜力.
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