一个JAK/STAT-Pdk1-S6K轴绕过系统生长限制以促进再生
Ananthakrishnan Vijayakumar Maya1,2,3, Lena Neuhaus4,5,6, Liyne Nogay1,2,3
1Hilde-Mangold-Haus, University of Freiburg, Freiburg, Germany.
Nature communications
|December 6, 2025
概括
炎症引起的组织损伤导致系统性生长限制. 再生细胞通过JAK/STAT通路通过Pdk1 (酸氨基醇依赖激酶-1) 的上调来克服这一问题,从而使增殖成为可能.
科学领域:
- 发展生物学 发展生物学
- 细胞的新陈代谢
- 信号通道的信号通道
背景情况:
- 众所周知,炎症会导致系统性生长限制,特别是在瘤缓冲症中.
- 炎症性组织损伤引发生长限制的机制以及再生组织如何克服这些限制的理解较少.
研究的目的:
- 为了研究代谢和信号适应,诱导和绕过系统生长限制,以应对组织损伤.
- 阐明在系统生长限制下参与再生增殖的途径.
主要方法:
- 使用Drosophila组织损伤模型.
- 分析了基因表达 (eiger,TNF-α同类) 和蛋白质调节 (Pdk1,JAK/STAT,mTORC1,S6K).
- 研究了胰岛素信号传递,蛋白质翻译和细胞增殖.
主要成果:
- 艾格尔在图像盘中的表达诱导了全身胰岛素限制和抵抗,损害了外围组织的生长.
- 再生细胞上调Pdk1,促进蛋白质翻译独立于胰岛素/Akt.
- 一个JAK/STAT-Pdk1-S6K轴被确定为再生增殖的关键.
- 在再生细胞中观察到氨基酸载体的升级和依赖mTORC1.
- 具有RasV12和scrib突变的瘤在胰岛素限制下选择了这些生长途径.
结论:
- 组织损伤通过胰岛素信号改变引发全身生长限制.
- 再生组织采用Pdk1依赖的机制,由JAK/STAT信号调节,以克服生长限制.
- 这些途径被瘤选择,这表明对癌症和组织修复有影响.
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