通过驱动胺胺代谢,p53促进抗病毒天生的免疫力
1State Key Laboratory of Molecular Oncology, School of Life Sciences, Tsinghua University, Beijing 100084, China; Tsinghua-Peking Center for Life Sciences, Beijing 100084, China.
Cell reports
|January 31, 2024
概括
瘤抑制剂p53通过增强胺生物合成途径 (HBP) 来增强抗病毒免疫力. 这种代谢重编程促进了对抗RNA病毒的干扰素-β (IFN-β) 生产.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢途径 代谢途径
- 病毒学 病毒学
背景情况:
- 瘤抑制剂p53对于细胞命运和预防癌症至关重要.
- 对于p53在抗病毒天生的免疫力中的作用尚不清楚.
- RNA病毒感染带来了重大的健康挑战.
研究的目的:
- 为了研究p53在抗病毒先天免疫反应中的作用.
- 阐明p53影响对RNA病毒免疫力的代谢机制.
- 确定p53介导抗病毒防御中的关键分子参与者.
主要方法:
- 利用了p53缺乏的巨细胞和小鼠模型.
- 评估了谷氨酸果糖-6-酸胺转移酶2 (GFPT2) 和六胺生物合成通路 (HBP) 活性的表达.
- 分析了MAVS和UBXN1.1的O-GlcNAcylation状态.
- 研究了涉及MAVS,UBXN1和TRAF3.3的蛋白质与蛋白质相互作用.
- 测量了干扰素β (IFN-β) 生产和TANK结合激酶1-干扰素调节因子3信号.
主要成果:
- 由于p53缺乏,导致GFPT2表达和HBP活性降低.
- p53可以提高GFPT2的调节,推动UDP-GlcNAc的合成和MAVS和UBXN1.1的O-GlcNAcylation.
- UBXN1的O-GlcNAcylation抑制了它与MAVS的相互作用.
- 这种抑制释放MAVS用于TRAF3结合,激活下游IFN-β生产.
- 抑制GFPT损害了p53介导的抗病毒免疫力在体外和体内.
结论:
- 通过对HBP的代谢调节,p53促进抗病毒先天免疫力.
- UBXN1和MAVS的p53驱动的O-GlcNAcylation对于增强IFN-β的产生至关重要.
- 这项研究揭示了瘤抑制,新陈代谢和抗病毒防御之间的新联系.
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