Bmp and Shh signaling mediate the expression of satb2 in the pharyngeal arches.

Bmp and Shh signaling mediate the expression of satb2 in the pharyngeal arches.
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DOI:
10.1371/journal.pone.0059533
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Eberhart JK
Eberhart JK
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Sheehan-Rooney K;Swartz ME;Lovely CB;Dixon MJ;Eberhart JK

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在人类中,转录因子 SATB2 的突变会导致上颚和下巴的严重缺陷。 SATB2 的表达和序列在包括斑马鱼在内的脊椎动物物种中高度保守。我们试图使用斑马鱼模型系统来了解 satb2 的调节。由于 satb2 的正常表达域,我们分析了 Hh 信号传导破坏或腹侧模式缺陷的突变体中 satb2 的表达。虽然 satb2 表达似乎独立于 Edn1 信号传导,但适当的表达需要 Shha、Smo、Smad5 和 Hand2 功能。移植实验表明,神经嵴细胞接收 Bmp 和 Hh 信号传导以诱导 satb2 表达。 Dorsomorphin 和环巴胺介导的 Bmp 和 Hh 信号传导抑制分别表明适当的 satb2 表达需要相对较早的 Bmp 信号和较晚的 Hh 信号。我们认为 Bmp 信号传导建立了神经嵴响应 Hh 信号传导的能力,从而诱导 satb2 表达。
In human, mutation of the transcription factor SATB2 causes severe defects to the palate and jaw. The expression and sequence of SATB2 is highly conserved across vertebrate species, including zebrafish. We sought to understand the regulation of satb2 using the zebrafish model system. Due to the normal expression domains of satb2, we analyzed satb2 expression in mutants with disrupted Hh signaling or defective ventral patterning. While satb2 expression appears independent of Edn1 signaling, appropriate expression requires Shha, Smo, Smad5 and Hand2 function. Transplantation experiments show that neural crest cells receive both Bmp and Hh signaling to induce satb2 expression. Dorsomorphin- and cyclopamine-mediated inhibition of Bmp and Hh signaling, respectively, suggests that proper satb2 expression requires a relatively earlier Bmp signal and a later Hh signal. We propose that Bmp signaling establishes competence for the neural crest to respond to Hh signaling, thus inducing satb2 expression.
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