Loss of Mst1/2 activity promotes non-mitotic hair cell generation in the neonatal organ of Corti.

Loss of Mst1/2 activity promotes non-mitotic hair cell generation in the neonatal organ of Corti.
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Mst1/2 活性丧失促进新生儿 Corti 器官中非有丝分裂毛细胞的生成

DOI:
10.1038/s41536-022-00261-4
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发表时间:
2022-10-25
影响因子:
7.2
通讯作者:
Sun, Shan
Sun, Shan
中科院分区:
医学1区
文献类型:
--
作者:
Lu, Xiaoling;Yu, Huiqian;Ma, Jiaoyao;Wang, Kunkun;Guo, Luo;Zhang, Yanping;Li, Boan;Zhao, Zehang;Li, Huawei;Sun, Shan

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哺乳动物感觉毛细胞(HC)的再生能力有限,这会导致 HC 死亡后永久性听力损失。在这里,我们使用体外 RNA 测序表明 Hippo 信号通路参与 HC 损伤和自我修复过程。通过 Mst1/2 抑制或 Yap 过表达来关闭 Hippo 信号传导会诱导 YAP 核积累,尤其是在支持细胞中,从而诱导额外的 HC 产生和损伤后 HC 再生。从机制上讲,Hippo 信号传导的这些作用与 Notch 通路协同作用。重要的是,多余的 HC 不仅表达 HC 标记物,而且还具有能够与体内听觉区域形成神经连接的纤毛结构。总而言之,调节 Hippo 提出了促进哺乳动物耳蜗支持细胞增殖、HC 再生以及与神经元重新连接的新策略。
Mammalian sensory hair cells (HCs) have limited capacity for regeneration, which leads to permanent hearing loss after HC death. Here, we used in vitro RNA-sequencing to show that the Hippo signaling pathway is involved in HC damage and self-repair processes. Turning off Hippo signaling through Mst1/2 inhibition or Yap overexpression induces YAP nuclear accumulation, especially in supporting cells, which induces supernumerary HC production and HC regeneration after injury. Mechanistically, these effects of Hippo signaling work synergistically with the Notch pathway. Importantly, the supernumerary HCs not only express HC markers, but also have cilia structures that are able to form neural connections to auditory regions in vivo. Taken together, regulating Hippo suggests new strategies for promoting cochlear supporting cell proliferation, HC regeneration, and reconnection with neurons in mammals.
DOI: 10.1101/gad.274027.115
发表时间: 2016-01-01
影响因子: 10.5
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