S100A4 通过驱动多倍体巨型癌细胞芽,促进辐射诱导的瘤重生
Ruyi Zhao1, Yanwei Song2, Jianzhu Xie2
1Department of Vascular Surgery, Shanghai General Hospital of Nanjing Medical University, Shanghai, China.
Cancer letters
|September 6, 2025
概括
在放射治疗后,多型巨型癌细胞 (PGCC) 促使结肠直肠癌重生. 向S100A4- ISG15通路可以抑制PGCC的芽,克服治疗耐药性并改善辐射敏感性.
科学领域:
- 癌症学
- 癌症生物学
- 放射治疗研究
背景情况:
- 放射治疗对于结肠直肠癌 (CRC) 治疗至关重要,但由于瘤重生,通常受到限制.
- 多倍体巨型癌细胞 (PGCC) 在辐射后出现,通过独特的芽过程驱动耐药性和重新繁殖.
- 不完全了解PGCC芽的分子调节及其逃避扩散保护措施.
研究的目的:
- 阐明在CRC中控制PGCC生命周期和芽后疗法的分子机制.
- 确定PGCC芽的关键调节者及其在治疗耐药性的作用.
- 探索克服放射治疗失败的潜在治疗目标.
主要方法:
- 使用单细胞转录组学和功能基因组学.
- 使用纵向模型来追踪PGCC的动态.
- 研究了S100A4,RAGE和干扰素信号在PGCC芽中的作用.
主要成果:
- 在放射治疗后的PGCC中,S100A4的调节升高,对它们的芽能力至关重要.
- S100A4通过RAGE受体起作用,抑制IRF3介导的干扰素- I信号传递,减轻ISG15/BST2介导的芽抑制.
- 抑制RAGE或S100A4会影响PGCC的芽并恢复放射敏感性.
结论:
- 在CRC中,S100A4- ISG15轴是放射性耐药性的关键调节器.
- S100A4-ISG15表达或"病毒芽分数"可以预测治疗反应.
- 针对S100A4-ISG15轴提供了克服CRC适应性持久性的潜在策略.
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