向Src SH3域介导的HSC糖解抑制了转录组,肌纤维细胞激活和结直肠肝脏转移
Yuanguo Wang1, Xianghu Wang1,2, Bing Bai1
1Tumor Microenvironment and Metastasis, the Hormel Institute, University of Minnesota, Austin, Minnesota, USA.
Hepatology (Baltimore, Md.)
|January 25, 2024
概括
转化生长因子β1 (TGFβ1) 驱动肝星细胞 (HSC) 激活到与癌症相关的纤维细胞 (CAF). 准葡萄糖载体1 (Glut1) 和Src信号抑制了这种代谢重编程,抑制了肝脏转移.
科学领域:
- 细胞生物学 细胞生物学
- 代谢过程中的代谢.
- 癌症研究 癌症研究
背景情况:
- 转化生长因子β1 (TGFβ1) 促进肝星细胞 (HSC) 激活成癌症相关纤维细胞 (CAF).
- 推动这种HSC激活的新陈代谢重编程仍然不太清楚.
- 这项研究研究了葡萄糖代谢在TGFβ1诱导的HSC激活中的作用.
研究的目的:
- 阐明由TGFβ1.1.诱导的高细胞代谢重编程的机制.
- 确定葡萄糖载体1 (Glut1) 和Src信号在CAF激活中的作用.
- 评估向这些途径在肝转移中的治疗潜力.
主要方法:
- 评估了HSC激活标记,并测量了葡萄糖吸收和糖解.
- 利用基因操纵 (Cre/LoxP) 破坏高细胞中的Glut1.
- 在体内模型中使用,包括HSC/瘤共同植入和对淘汰小鼠的正管注射.
- 在HSC和肝转移上进行RNA测序和空间学.
主要成果:
- TGFβ1增加了HSC中的血膜Glut1,葡萄糖吸收和糖解,导致CAF激活.
- 准Glut1或Src信号取消了TGFβ1诱导的CAF激活.
- 一个Src/SH3域结合蛋白5/Rab11/Glut1复合体调解了Glut1的运输到血膜.
- 特定于HSC的Glut1缺失抑制了CAF的激活,并在体内减少了肝转移.
- 多omics分析显示,Glut1缺乏改变了HSC和瘤细胞转录组,减少了转移.
结论:
- Src SH3域介导的代谢重编程对于TGFβ1诱导的CAF激活至关重要.
- 针对Src/Glut1轴提供了一个潜在的策略来抑制CAF激活和肝转移.
- 抑制HSC的代谢重编程可以破坏前转移性肝脏微环境.
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