Deletion of Atoh1 disrupts Sonic Hedgehog signaling in the developing cerebellum and prevents medulloblastoma.

Deletion of Atoh1 disrupts Sonic Hedgehog signaling in the developing cerebellum and prevents medulloblastoma.
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DOI:
10.1126/science.1181453
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发表时间:
2009-12-04
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Zoghbi HY
Zoghbi HY
中科院分区:
其他
文献类型:
--
作者:
Flora A;Klisch TJ;Schuster G;Zoghbi HY

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颗粒神经元前体 (GNP) 是产后神经系统中增殖最活跃的细胞,控制其细胞周期的途径发生突变可导致髓母细胞瘤。转录因子 Atoh1 被怀疑有助于 GNP 增殖,但其在正常和肿瘤性产后小脑发育中的作用仍有待探索。我们证明 Atoh1 调节 Sonic Hedgehog 的信号转导途径,Sonic Hedgehog 是 GNP 增殖所必需的细胞外因子,并且我们证明 Atoh1 的缺失可以预防髓母细胞瘤小鼠模型中的小脑肿瘤。我们的数据揭示了 Atoh1 在出生后小脑发育中的功能,并确定了一种可靶向调节髓母细胞瘤形成的新机制。
Granule neuron precursors (GNPs) are the most actively proliferating cells in the post-natal nervous system and mutations in pathways controlling their cell cycle can result in medulloblastoma. The transcription factor Atoh1 has been suspected to contribute to GNP proliferation, but its role in normal and neoplastic post-natal cerebellar development remains unexplored. We show that Atoh1 regulates the signal transduction pathway of Sonic Hedgehog, an extracellular factor that is essential for GNP proliferation, and we demonstrate that deletion of Atoh1 prevents cerebellar neoplasia in a mouse model of medulloblastoma. Our data shed light on the function of Atoh1 in post-natal cerebellar development and identify a new mechanism that can be targeted to regulate medulloblastoma formation.
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