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瘤抑制剂FRMD3通过隙信号通路控制乳腺上皮细胞命运的决定
Ji Ma1, Yuqing Gong1, Xiaoran Sun1,2
1Program for Cancer and Cell Biology, Department of Human Anatomy, Histology, and Embryology, School of Basic Medical Sciences, and Peking University International Cancer Institute, State Key Laboratory of Molecular Oncology, Peking University Health Science Center, Beijing 100191, China.
丢失含有FERM域的蛋白3 (FRMD3) 会损害乳腺发育,促进干性,导致三阴性乳腺癌. FRMD3通过激活Notch信号来作为瘤抑制剂,这对乳腺上皮细胞可塑性至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 发育生物学是发展生物学.
- 癌症研究 癌症研究
背景情况:
- 乳腺上皮细胞 (MEC) 谱系的可塑性,特别是光线向基底转变,是乳腺发育的关键,但人们对其了解甚少.
- 调节MEC谱系可塑性的分子机制及其与乳腺癌的联系仍然难以捉摸.
研究的目的:
- 阐明FERM域含蛋白3 (FRMD3) 在乳腺发育和血统可塑性中的作用.
- 研究FRMD3影响MEC的机制及其对三阴性乳腺癌的影响.
主要方法:
- 使用了患有 Frmd3 缺乏和 PyMT 瘤基因的小鼠模型.
- 在MEC上进行单细胞RNA测序 (scRNA-seq).
- 研究了涉及FRMD3,Disheveled-2,USP9x,CK1,FOXK1/2和NICD的蛋白质蛋白质相互作用.
主要成果:
- 乳腺中FRMD3缺乏抑制发育,诱导MEC干,并促进三阴性乳腺癌.
- 丧失FRMD3会导致光细胞转基细胞的表型,并损害Notch信号传递.
- FRMD3促进了Disheveled-2的降解,并减少了其酸化和核定位,从而调节了依赖痕的谱系可塑性.
结论:
- 在乳腺癌中,FRMD3充当瘤抑制剂.
- FRMD3 是 Notch 信号通路的内源激活剂.
- FRMD3在促进基底到光线MEC转换和维持乳腺平衡方面发挥着至关重要的作用.
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