细胞外矩阵刚性通过TYK2-介导的机械传导控制乳腺癌转移
Zhimin Hu1, Hannah E Majeski1, Aida Mestre-Farrera1
1Department of Pharmacology, Moores Cancer Center, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0819, USA.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
雅努斯酶TYK2通过在细胞外基质刚度低的情况下定位到细胞膜中来抑制乳腺癌转移. 抑制TYK2有助于癌症的扩散,突出显示TYK2抑制剂的患者需要进行乳腺癌查.
科学领域:
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 来自细胞外基质 (ECM) 的机械线索显著影响细胞功能.
- 乳腺瘤硬度增加与更高的转移风险和较差的患者结果相关.
- 该JAK/STAT通路涉及到各种细胞信号级联.
研究的目的:
- 为了研究JAK家族激酶TYK2在乳腺癌转移中的作用.
- 阐明ECM刚性影响乳腺癌细胞行为的机制.
- 确定TYK2抑制对乳腺癌的临床影响.
主要方法:
- 遗传和药理上抑制TYK2在哺乳动物中和患者衍生器官.
- 评估表皮层-介质细胞过渡 (EMT) 和入侵.
- 使用乳腺瘤细胞和来自患者的样本进行异体移植研究.
- 免疫光检测以确定TYK2定位与ECM刚度相关.
主要成果:
- 抑制TYK2促进乳腺癌细胞的入侵和转移,特别是在低ECM刚度的情况下.
- 在TYK2阻塞诱导EMT时,它与常规细胞因子诱导的JAK/STAT信号独立.
- 在低度下,TYK2通过IFNAR1关联定位到血膜,但在高度下变得细胞质和不活跃.
- 正常的乳腺上皮表现出膜局部化的TYK2,而侵入性瘤表现出细胞质的TYK2.
结论:
- 通过一个TYK2-依赖机制,ECM刚性抑制乳腺癌转移.
- TYK2的局部化和活性是由ECM硬度调节的.
- 抑制TYK2可能会增加乳腺癌转移的风险,需要对正在接受治疗的患者进行仔细监测.
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