Indian hedgehog requires additional effectors besides Runx2 to induce osteoblast differentiation.

Indian hedgehog requires additional effectors besides Runx2 to induce osteoblast differentiation.
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DOI:
10.1016/j.ydbio.2011.11.013
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发表时间:
2012-02-01
影响因子:
2.7
通讯作者:
Long F
Long F
中科院分区:
生物学3区
文献类型:
--
作者:
Tu X;Joeng KS;Long F

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印度刺猬(Ihh)是软骨内骨骼胚胎发育过程中成骨细胞分化不可或缺的。在缺乏Ihh的情况下,成骨细胞谱系的细胞不能激活Runx 2的表达,Runx 2是成骨细胞分化所必需的转录因子。然而,目前尚不清楚Runx 2表达的缺乏是否是Ihh缺失胚胎成骨细胞形成失败的唯一原因。在这里,通过创建一个小鼠等位基因,表达Runx 2在Cre依赖的方式,我们表明,力表达Runx 2的骨骼发生细胞恢复骨形成的Runx 2-null,但不是在Ihh-null胚胎。因此,Ihh诱导成骨细胞分化的机制除了Runx 2之外还需要其他效应物。
Indian hedgehog (Ihh) is indispensable for osteoblast differentiation during embryonic development of the endochondral skeleton. In the absence of Ihh, cells of the osteoblast lineage fail to activate the expression of Runx2, a transcription factor integral to osteoblast differentiation. However, it is hitherto unclear whether the lack of Runx2 expression is solely responsible for the failure of osteoblast formation in Ihh-null embryos. Here, by creating a mouse allele that expresses Runx2 in a Cre-dependent manner, we show that force-expression of Runx2 in the skeletogenic cells restores bone formation in the Runx2-null, but not in the Ihh-null embryo. Thus, the mechanism through which Ihh induces osteoblast differentiation requires other effectors in addition to Runx2.
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发表时间: 1999-10-01
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