可诱导DNA损伤的转录3积极调节RIPK1-介导的亡
Rui Ni1,2,3, Ting Cao4, Xiaoyun Ji1,2,3
1International Genome Center, Jiangsu University, Zhenjiang, 212013, China.
Cell death and differentiation
|October 3, 2024
概括
可诱导DNA损伤的转录3 (DDIT3) 通过调节RIPK1的激活,促进了被编程的细胞死亡 (死亡). 这种转录因子在压力诱导的亡中起着关键作用,提供了新的治疗点.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 可诱导DNA损伤的转录3 (DDIT3) 是一种已知的转录因子,在细胞内网膜应激过程中促进细胞亡.
- 调节亡的精确机制,一种独特的编程细胞死亡形式,仍在被阐明.
研究的目的:
- 为了研究DDIT3在亡中的作用.
- 阐明DDIT3通过哪些分子机制影响亡信号通路的分子机制.
主要方法:
- 研究了DDIT3与p38 MAPK和MK2的相互作用.
- 在特定部位 (Ser320和Ser166) 分析了RIPK1酸化.
- 用于体内小鼠模型来评估DDIT3对心脏组织死细胞的作用.
主要成果:
- DDIT3直接抑制p38的MAPK-MK2相互作用,阻断MK2的激活,并促进p38的MAPK的激活.
- DDIT3通过Ser166的酸化促进了RIPK1的激活,从而导致亡.
- 一个特定的10氨基酸N终端段的DDIT3对于其亲生尸体的功能至关重要.
- 在体内,DDIT3表达诱导了亡,而其删除保护了小鼠的心脏免受压力诱导的亡.
结论:
- DDIT3在促进亡中发挥了新的,以前未被认可的作用.
- DDIT3作为RIPK1激活的关键调节剂,驱动p38 MAPK下游的亡.
- 这些发现揭示了亡的新调节途径,并突出了DDIT3作为潜在的治疗点.
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