Hedgehog Pathway Drives Fusion-Negative Rhabdomyosarcoma Initiated From Non-myogenic Endothelial Progenitors.

Hedgehog Pathway Drives Fusion-Negative Rhabdomyosarcoma Initiated From Non-myogenic Endothelial Progenitors.
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DOI:
10.1016/j.ccell.2017.12.001
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发表时间:
2018-01-08
期刊:
影响因子:
50.3
通讯作者:
Hatley ME
Hatley ME
中科院分区:
医学1区
文献类型:
--
作者:
Drummond CJ;Hanna JA;Garcia MR;Devine DJ;Heyrana AJ;Finkelstein D;Rehg JE;Hatley ME

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横纹肌肉瘤 (RMS) 是一种儿童软组织肉瘤,其组织学类似于胚胎骨骼肌。 RMS 发生在全身各处,并且完全的肌源性起源并不能解释 RMS 发生在没有骨骼肌的部位。我们之前描述了使用 aP2-Cre 激活条件组成型活性 Smoothened 突变体 (SmoM2) 的 RMS 模型。使用遗传命运图谱,我们显示表达 Cre 的内皮祖细胞中 SmoM2 的表达导致肌源性转分化和 RMS。我们说明头颈部内的内皮和骨骼肌由表达 Kdr 的祖细胞产生,刺猬通路激活导致肌源性规范因子的异常表达,作为驱动横纹肌肉瘤发生的潜在机制。这些发现表明 RMS 可能源于非肌源性细胞的异常发育。 Drummond 等人利用遗传命运图谱。研究表明,内皮祖细胞中的刺猬通路激活会导致肌源性规范因子、肌源性转分化和横纹肌肉瘤(RMS)的异常表达。这一发现或许可以解释 RMS 如何在缺乏骨骼肌的部位发生。
Rhabdomyosarcoma (RMS) is a pediatric soft tissue sarcoma that histologically resembles embryonic skeletal muscle. RMS occurs throughout the body and an exclusively myogenic origin does not account for RMS occurring in sites devoid of skeletal muscle. We previously described a RMS model activating a conditional constitutively active Smoothened mutant (SmoM2) with aP2-Cre. Using genetic fate mapping, we show SmoM2 expression in Cre expressing endothelial progenitors results in myogenic transdifferentiation and RMS. We illustrate endothelium and skeletal muscle within the head and neck arise from Kdr expressing progenitors and that hedgehog pathway activation results in aberrant expression of myogenic specification factors as a potential mechanism driving rhabdomyosarcomagenesis. These findings suggest that RMS can originate from aberrant development of non-myogenic cells. Using genetic fate mapping, Drummond et al. show that hedgehog pathway activation in endothelial progenitors results in aberrant expression of myogenic specification factors, myogenic transdifferentiation, and rhabdomyosarcoma (RMS). The finding may explain how RMS develops in sites devoid of skeletal muscle.
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