一种过度活跃的STAT3拼接变体在小鼠中促进结肠炎症相关的瘤发生
Meng Xu1, Dingju Wei1, Shu Zhong1
1Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, China.
Science translational medicine
|December 10, 2025
概括
信号转换器和转录3 (STAT3) 异型的激活器,由神秘的拼接部位产生,影响结肠癌. 在STAT3中缺少Ser701会促进炎症和瘤发生.
科学领域:
- 分子生物学分子生物学
- 细胞信号传递 细胞信号传递
- 癌症研究 癌症研究
背景情况:
- 信号转换器和转录3激活器 (STAT3) 对于细胞信号传输至关重要.
- 过度激活STAT3与炎症和癌症有关.
- 在疾病中调节STAT3的机制尚未完全理解.
研究的目的:
- 研究STAT3异质性在结肠癌中的作用.
- 通过酸化和拼接阐明STAT3调节的机制.
主要方法:
- 在结肠癌中分析STAT3异型 (wS701/ΔS701).
- 研究了Ser701 (p-S701) 的酸化及其通过mTORC1和PP2A的调节.
- 使用了具有STAT3 S701删除的小鼠模型.
主要成果:
- 在STAT3中,神秘的拼接部位会产生不同于Ser701.1的异型.
- STAT3_ΔS701异型在结肠癌中更为丰富,并且过度活跃.
- 在S701 (p-S701) 的酸化作用为STAT3活性的自我限制机制.
- 在小鼠中S701缺失增加了对结肠炎症和瘤发生的敏感性.
- 抑制PP2A通过维持p-S701.1,减轻野生类型小鼠的结肠炎症.
结论:
- 在结肠炎症和结肠直肠癌中,STAT3异质性,特别是Ser701的存在或不存在,是至关重要的.
- 涉及S701酸化的STAT3自我限制机制对于防止病态STAT3激活至关重要.
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