诺奇1 O-GlcNAcylation 驱动瘤干和机械适应于硬的微环境,并促进瘤复发
Chengjie Lian1, Weiyan Peng1, Peiqiang Su2
1Department of Breast and Thyroid Surgery, Chongqing Key Laboratory of Molec, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
The Journal of clinical investigation
|February 3, 2026
概括
循环性冠状瘤细胞通过机械重塑和增强的干度适应硬的环境,由O-GlcNAcylation of Notch1.1驱动. 删除MIR31促进了这种适应,表明其作为复发生物标志物的潜力.
科学领域:
- 在瘤学瘤学.
- 生物化学 生化学
- 机械生物学 机械生物学
背景情况:
- 冠状瘤是一种罕见的恶性骨瘤,复发率高.
- 复发性冠状瘤通常来自残留的瘤细胞,并且与原发性瘤相比,面临着更硬的细胞外微环境 (ECM).
研究的目的:
- 为了研究复发性冠状瘤细胞适应和生存在更硬的微环境中的机制.
- 确定关键的分子参与者和参与硬性抵抗和瘤复发的信号通路.
主要方法:
- 对复发性冠状瘤组织和细胞系的分析.
- 研究细胞骨重组,茎状标记物和Notch信号的研究.
- 探索O-GlcNAcylation和Notch1通路中的特定酸化位点的作用.
- 评估MIR31删除对LYN激酶活性和度感知的影响.
主要成果:
- 复发性冠状瘤细胞表现出细胞骨架重组,增加了干度,并在暴露于硬基质时激活了Notch信号.
- 刚性ECM触发了连接体独立的EPHA2酸化,激活了LYN激酶,随后是O-GlcNAcosyltransferase (OGT).
- OGT在EPHA2上化关键残留物,导致Notch1细胞内域 (NICD1) 的O-GlcNAcylation,并促进与机械适应和茎结合相关的基因.
- 删除MIR31增强了LYN活性,增加了度敏感性和促进NICD1 O-GlcNAcylation,从而推动机械适应和复发.
结论:
- 提出了一种新的冠状瘤复发模型,涉及机械适应性组织和瘤干性.
- NICD1的O-GlcNAcylation对于瘤细胞适应刚性ECM的过程中至关重要.
- 删除MIR31作为瘤复发的潜在生物标志物,可以指导针对性治疗的患者分层.
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