人类T细胞上的酸甘减弱了通过Fas通路执行的死亡程序
Vanessa Affe1, Qianmeng Lei1, Tim S Veth2
1Department of Pharmacology and Toxicology, The University of Toronto, Canada.
The Journal of biological chemistry
|December 14, 2025
概括
在T细胞上的酸通过影响Fas受体通路来调节编程细胞死亡. 这一发现突显了T细胞糖核在免疫反应和疾病中的作用.
科学领域:
- 免疫学 免疫学 免疫学
- 葡萄糖生物学 葡萄糖生物学
- 细胞生物学 细胞生物学
背景情况:
- T细胞对于适应性免疫是至关重要的,其持久性由被编程的细胞死亡途径调节.
- 瘤坏死因子 (TNF) 受体超级家族成员介导T细胞死亡.
- 在死亡受体上与α2-6结合的酸终结型甘氨酸 (sialoglycans) 可以减弱亡,作为癌症中有利于生存的机制.
研究的目的:
- 调查糖在调节人类T细胞细胞死亡受体活性方面的尚未探索的作用.
- 了解T细胞甘氨酸编辑是如何在治疗上有益的.
主要方法:
- 使用了一种不朽的T细胞系 (ST6GAL1-Jurkat) 缺乏α2-6-sialoglycans.
- 由Fas受体 (FasR),TNFR1和TRAIL-R1.1诱导的评估的亡.
- 分析了FasR重组,并采用了蛋白学来研究信号通路.
- 在初级人类T细胞上使用了复合性酸分裂酶 (sialidase).
主要成果:
- α2-6-sialoglycans的损失减弱了Jurkat细胞中FasR诱导的亡,对TNFR1和TRAIL-R1.1的影响较小.
- 与野生类型相比,FasR重组在ST6GAL1Jurkat细胞中是有限的.
- 酸蛋白组学表明,酸糖的损失对支持生存的MAPK/ERK通路进行了负面调节.
- 利酶治疗证实,甘调节了人类T细胞中FasR驱动的细胞死亡.
结论:
- 在T细胞上存在的糖体显著影响细胞命运,特别是通过Fas受体通路.
- 这些发现强调了T细胞糖核对健康和疾病的免疫调节的重要性.
- 为进一步研究T细胞的治疗性甘氨酸编辑提供了基础.
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