A mouse model of rhabdomyosarcoma originating from the adipocyte lineage.

A mouse model of rhabdomyosarcoma originating from the adipocyte lineage.
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DOI:
10.1016/j.ccr.2012.09.004
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发表时间:
2012-10-16
期刊:
影响因子:
50.3
通讯作者:
Olson EN
Olson EN
中科院分区:
医学1区
文献类型:
--
作者:
Hatley ME;Tang W;Garcia MR;Finkelstein D;Millay DP;Liu N;Graff J;Galindo RL;Olson EN

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横纹肌肉瘤 (RMS) 是一种侵袭性骨骼肌谱系肿瘤,由无法退出细胞周期并无法融合成合胞肌的恶性成肌细胞组成。横纹肌肉瘤包括两种组织病理学亚型:由融合蛋白 PAX3-FOXO1 或 PAX7-FOXO1 驱动的腺泡状横纹肌肉瘤,以及具有遗传异质性的胚胎性横纹肌肉瘤 (ERMS)。在这里,我们发现,通过在小鼠中表达组成型活性 Smoothened 等位基因,脂肪细胞限制性激活 Sonic Hedgehog 信号,从而产生侵袭性骨骼肌肿瘤,该肿瘤显示出具有高外显率的人类 ERMS 的组织学和分子特征。我们的研究结果表明,脂肪细胞祖细胞可能是 Sonic Hedgehog 驱动的 ERMS 的起源细胞,表明 RMS 可以起源于非骨骼肌前体细胞。
Rhabdomyosarcoma (RMS) is an aggressive skeletal muscle-lineage tumor composed of malignant myoblasts that fail to exit the cell cycle and are blocked from fusing into syncytial muscle. Rhabdomyosarcoma includes two histolopathologic subtypes: alveolar rhabdomyosarcoma, driven by the fusion protein PAX3-FOXO1 or PAX7-FOXO1, and embryonal rhabdomyosarcoma (ERMS), which is genetically heterogeneous. Here, we show that adipocyte-restricted activation of Sonic Hedgehog signaling through expression of a constitutively active Smoothened allele in mice gives rise to aggressive skeletal muscle tumors that display the histologic and molecular characteristics of human ERMS with high penetrance. Our findings suggest that adipocyte progenitors can be a cell of origin for Sonic Hedgehog-driven ERMS, showing that RMS can originate from non-skeletal muscle precursors.
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