Prevention of medulla neuron dedifferentiation by Nerfin-1 requires inhibition of Notch activity

Prevention of medulla neuron dedifferentiation by Nerfin-1 requires inhibition of Notch activity
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Nerfin-1 预防髓质神经元去分化需要抑制 Notch 活性

DOI:
10.1242/dev.141341
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发表时间:
2017-04
期刊:
影响因子:
4.6
通讯作者:
Lei Zhang
Lei Zhang
中科院分区:
生物学2区
文献类型:
--
作者:
Jiajun Xu;Xue Hao;Mengxin Yin;Yi Lu;Yunyun Jin;Jinjin Xu;Ling Ge;Wenqing Wu;Margaret Ho;Yingzi Yang;Yun Zhao;Lei Zhang

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果蝇幼虫中枢神经系统由中枢脑、腹神经索和视叶组成。在这些区域,神经母细胞(NBS)不对称分裂以自我更新,并产生分化的神经元或胶质细胞。到目前为止,防止神经元去分化的机制仍然不清楚,特别是在视叶。在这里,我们证明了锌指转录因子Nerfin-1在早期延髓神经元中表达,并且对维持其分化是必不可少的。Nerfin-1的缺失激活了Notch信号,从而促进了神经元到NB的逆转。抑制Notch信号在很大程度上挽救了nerfin-1突变克隆的去分化。因此,我们得出结论,Nerfin-1抑制了延髓神经元的Notch活性,防止了它们的去分化。摘要:锌指转录因子Nerfin-1在早期延髓神经元中的表达缺失激活了Notch信号,并促进了神经元到成神经细胞的逆转。
The Drosophila larval central nervous system comprises the central brain, ventral nerve cord and optic lobe. In these regions, neuroblasts (NBs) divide asymmetrically to self-renew and generate differentiated neurons or glia. To date, mechanisms of preventing neuron dedifferentiation are still unclear, especially in the optic lobe. Here, we show that the zinc-finger transcription factor Nerfin-1 is expressed in early-stage medulla neurons and is essential for maintaining their differentiation. Loss of Nerfin-1 activates Notch signaling, which promotes neuron-to-NB reversion. Repressing Notch signaling largely rescues dedifferentiation in nerfin-1 mutant clones. Thus, we conclude that Nerfin-1 represses Notch activity in medulla neurons and prevents them from dedifferentiation. Summary: Loss of expression of zinc-finger transcription factor Nerfin-1 in early-stage medullar neurons activates Notch signaling and promotes neuron-to-neuroblast reversion.
果蝇视神经叶中主轴取向和神经干细胞命运的调节。
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