PTH通过Src-依赖的YAP稳定来抵消Hippo信号,以增强骨髓 stromal 细胞分化
Sara Monaci1, Mengrui Wu1, Hiroyuki Okada1
1Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, Boston, Massachusetts, USA.
JCI insight
|July 22, 2025
概括
甲状腺激素 (PTH) 信号稳定YAP蛋白质,通过通过PLC和Src激酶对抗Hippo通路. 这促进了骨髓 stromal 细胞的分化,影响骨重塑.
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
- 骨生物学 骨生物学 骨生物学
背景情况:
- 副甲状腺激素 (PTH) 调节和,影响骨重塑和肌细胞分化.
- 通过PTH/PTH相关 (PTHrP) 受体发出PTH信号,激活像脂酶C (PLC) 这样的途径.
- PTH信号传递,PLC激活和其他细胞通路,特别是河马通路之间的相互作用在很大程度上仍未被探索.
研究的目的:
- 为了研究PTH信号传递对骨髓 stromal 细胞 (BMSCs) 的Hippo通路的影响.
- 阐明PTH影响YAP蛋白稳定性和活性的分子机制.
- 确定Src酶在调解PTH对YAP和BMSC分化的影响中的作用.
主要方法:
- 大量RNA测序 (RNA-Seq) 的PTH处理的小鼠BMSC线 (W-20).
- 对YAP蛋白稳定性,酸化 (YAP S127),无处不在和核转位的分析.
- 对Src酶活性和YAP氨酸酸化的评估 (YAP Y428).
主要成果:
- 在BMSCs中,PTH治疗显著改变了Hippo通路基因表达.
- PTH稳定了YAP蛋白,促进了其核转位和YAP目标基因的表达.
- PTH增加了Src酶活性,导致YAP Y428酸化,这对YAP稳定性和BMSC分化至关重要.
结论:
- 在BMSCs中,PTH信号与Hippo通路积极交叉.
- PTH利用PLC/Ca2+/Src氨酸激酶级联来稳定YAP,从而对抗Hippo的信号传递.
- 这种机制促进了BMSCs的骨质和脂肪分化,突出了PTH在调节树皮细胞命运中的新作用.
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