由TGF-β诱导的HER2酸化促进了乳腺形态发生和乳腺癌进展
Qiaoni Shi1, Fei Huang1, Yalong Wang2
1The State Key Laboratory of Membrane Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China.
The Journal of cell biology
|February 26, 2024
概括
转化生长因子β (TGF-β) 通过在Ser779.9酸化它来激活HER2信号传递. 这种相互作用驱动乳腺癌的进展,细胞迁移和转移,突出了乳腺发育和癌症的关键机制.
科学领域:
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 转化生长因子β (TGF-β) 和HER2信号通路是乳腺癌进展的已知合作者.
- 它们的相互作用和TGF-β激活MAPK和AKT通路的精确分子机制仍然不完全理解.
研究的目的:
- 阐明TGF-β增强HER2激活的分子机制.
- 研究TGF-β诱导的HER2酸化在乳腺发育和乳腺癌进展中的作用.
主要方法:
- 利用基于细胞的测试和小鼠模型来研究TGF-β和HER2信号之间的相互作用.
- 研究了HER2酸化在Ser779对下游信号通路 (MAPK,AKT) 和细胞功能的影响.
- 在人类乳腺癌样本中分析了HER2 S779酸化水平.
主要成果:
- TGF-β通过TβRI激酶活性增强HER2激活,特别是通过HER2在Ser779的酸化,从而促进随后的Y1248酸化.
- HER2 S779A突变小鼠表现出乳腺发育缺陷,包括管道延伸和分支受损.
- 野生型的HER2,但不是S779A突变,促进TGF-β诱导的上皮细胞-介质细胞过渡,细胞迁移和肺转移.
- 在人类乳腺癌中HER2 S779酸化升高与HER2,MAPK和AKT激活具有正相关性.
结论:
- TGF-β诱导的S779酸化是HER2激活的关键事件.
- 这种酸化在乳腺发育和TGF-β在乳腺癌中的亲瘤功能中起着重要作用.
- 针对这种TGF-β-HER2相互作用可能为乳腺癌提供治疗策略.
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