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Jagged1在促进或抑制乳腺瘤形成方面的亚型特定作用
Wen-Cheng Chung1,2, Wei Wang3, Lavanya Challagundla1
1Department of Cell and Molecular Biology, University of Mississippi Medical Center, Jackson, MS, USA.
Oncogenesis
|January 31, 2025
概括
Jagged1删除扩大了乳腺干细胞,改变了分化. 它促进光线乳腺癌,但抑制基底瘤,根据亚型不同影响患者的存活率.
科学领域:
- 在瘤学瘤学.
- 发展生物学 发展生物学
- 细胞信号传递 细胞信号传递
背景情况:
- 痕信号在乳腺癌中起着复杂的作用,具有瘤抑制和瘤致癌功能.
- 在乳腺中,Jagged1的一个关键的Notch配体的具体作用尚不清楚.
研究的目的:
- 研究Jagged1在乳腺发育和乳腺癌中的功能.
- 确定Jagged1删除对不同亚型的乳腺干细胞,分化和瘤形成的影响.
主要方法:
- 在处女和怀孕小鼠的乳腺上皮细胞中删除Jagged1.
- 分析乳腺干细胞 (MaSC) 分区,光分化 (孕激素受体表达) 和膜发育.
- 从光细胞和基底细胞评估小鼠乳腺瘤的形成.
- 在光线和基底乳腺癌亚型中,Jagged1,HEY1和HEY2表达与患者存活率的相关性.
主要成果:
- 处女小鼠中的Jagged1删除扩大了MASC和损害了光线分化.
- 破碎1删除没有影响怀孕小鼠的分化或卷积.
- Jagged1删除促进了光线乳腺癌,但抑制了基底乳腺癌.
- 观察到Notch目标基因Hey1 (光线) 和Hey2 (基底) 的下调.
- 高的JAG1/HEY1表达与光线瘤中的更好的生存相关;高的JAG1/HEY2与基础瘤中的更差的生存相关.
结论:
- Jagged1是乳腺上皮层次的关键调节者.
- 在光线和基底乳腺癌亚型中,Jagged1介导的Notch信号具有不同的作用.
- Jagged1表达模式预测不同乳腺癌亚型患者的生存结果.
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