Acquisition of granule neuron precursor identity is a critical determinant of progenitor cell competence to form Shh-induced medulloblastoma.

Acquisition of granule neuron precursor identity is a critical determinant of progenitor cell competence to form Shh-induced medulloblastoma.
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DOI:
10.1016/j.ccr.2008.07.005
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发表时间:
2008-08-12
期刊:
影响因子:
50.3
通讯作者:
Ligon, Keith L.
Ligon, Keith L.
中科院分区:
医学1区
文献类型:
--
作者:
Schueller, Ulrich;Heine, Vivi M.;Mao, Junhao;Kho, Alvin T.;Dillon, Allison K.;Han, Young-Goo;Huillard, Emmanuelle;Sun, Tao;Ligon, Azra H.;Qian, Ying;Ma, Qiufu;Alvarez-Buylla, Arturo;McMahon, Andrew P.;Rowitch, David H.;Ligon, Keith L.

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脑肿瘤髓母细胞瘤的起源是干细胞还是限制性祖细胞尚不清楚。为了研究这一点,我们激活了多能和谱系限制性CNS祖细胞中的致癌Hedgehog(Hh)信号。我们观察到正常单能小脑颗粒神经元前体(CGNP)来源于hGFAP+和Olig2+ RL祖细胞。在早期和晚期CNS祖细胞的光谱中Hh活化产生类似的髓母细胞瘤,但不是其他脑癌,这表明获得CGNP身份对于肿瘤发生是必不可少的。我们在人类和小鼠髓母细胞瘤中发现,表达胶质相关标记物GFAP和Olig2的细胞是肿瘤性的,并且它们保留了胚胎型颗粒谱系祖细胞的特征。因此,致癌Hh信号促进髓母细胞瘤从谱系限制的颗粒细胞祖细胞。
Origins of the brain tumor, medulloblastoma, from stem cells or restricted progenitor cells are unclear. To investigate this, we activated oncogenic Hedgehog (Hh) signaling in multipotent and lineage-restricted CNS progenitors. We observed that normal unipotent cerebellar granule neuron precursors (CGNP) derive from hGFAP+ and Olig2+ RL progenitors. Hh activation in a spectrum of early and late stage CNS progenitors generated similar medulloblastomas, but not other brain cancers, indicating that acquisition of CGNP identity is essential for tumorigenesis. We show in human and mouse medulloblastoma that cells expressing the glia-associated markers Gfap and Olig2 are neoplastic and that they retain features of embryonic-type granule lineage progenitors. Thus, oncogenic Hh signaling promotes medulloblastoma from lineage-restricted granule cell progenitors.
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