Medulloblastoma can be initiated by deletion of Patched in lineage-restricted progenitors or stem cells.

Medulloblastoma can be initiated by deletion of Patched in lineage-restricted progenitors or stem cells.
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DOI:
10.1016/j.ccr.2008.07.003
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发表时间:
2008-08-12
期刊:
影响因子:
50.3
通讯作者:
Wechsler-Reya RJ
Wechsler-Reya RJ
中科院分区:
医学1区
文献类型:
--
作者:
Yang ZJ;Ellis T;Markant SL;Read TA;Kessler JD;Bourboulas M;Schüller U;Machold R;Fishell G;Rowitch DH;Wainwright BJ;Wechsler-Reya RJ

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髓母细胞瘤是儿童中最常见的恶性脑肿瘤,但其产生的细胞仍不清楚。在这里,我们检查了 Sonic Hedgehog (Shh) 通路突变引起的髓母细胞瘤的起源。我们发现,神经祖细胞中 Shh 信号的激活会在 3 个月大时导致髓母细胞瘤。干细胞中的 Shh 通路激活可促进干细胞增殖,但仅在神经元谱系定向和扩展后才会引起肿瘤。值得注意的是,干细胞中引发的肿瘤比祖细胞中引发的肿瘤发展得更快,所有动物都会在 3-4 周内死亡。这些研究表明,髓母细胞瘤可以在祖细胞或干细胞中起始,但 Shh 诱导的肿瘤发生与神经元谱系定向相关。
Medulloblastoma is the most common malignant brain tumor in children, but the cells from which it arises remain unclear. Here we examine the origin of medulloblastoma resulting from mutations in the Sonic hedgehog (Shh) pathway. We show that activation of Shh signaling in neuronal progenitors causes medulloblastoma by 3 months of age. Shh pathway activation in stem cells promotes stem cell proliferation, but only causes tumors after commitment to – and expansion of – the neuronal lineage. Notably, tumors initiated in stem cells develop more rapidly than those initiated in progenitors, with all animals succumbing by 3–4 weeks. These studies suggest that medulloblastoma can be initiated in progenitors or stem cells, but that Shh-induced tumorigenesis is associated with neuronal lineage commitment.
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发表时间: 2007-01-01
期刊: STEM CELLS
影响因子: 5.2
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