Tbx6-mediated notch signaling controls somite-specific Mesp2 expression

Tbx6-mediated notch signaling controls somite-specific Mesp2 expression
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DOI:
10.1073/pnas.0508238103
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发表时间:
2006-03-07
影响因子:
11.1
通讯作者:
Saga, Y
Saga, Y
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Yasuhiko, Y;Haraguchi, S;Saga, Y

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Mesp2是一种​​在体节发生中发挥重要作用的转录因子,其表达严格限制在节段边界形成之前的前体前中胚层。转录开关周期与分段时钟相关。在我们目前的研究中,我们发现 T-box 转录因子 Tbx6 对于 Mesp2 的表达至关重要。 Tbx6 直接与 Mesp2 基因上游区域结合,并介导前体前中胚层中的 Notch 信号传导以及随后的 Mesp2 转录。因此,我们的数据揭示了一种机制,通过 Tbx6 依赖性 Notch 信号传导作用于 Mesp2 的转录调控。这一发现揭示了参与体节发生的各种信号通路相互作用网络的另一个组成部分。
Mesp2 is a transcription factor that plays fundamental roles in somitogenesis, and its expression is strictly restricted to the anterior presomitic mesoderm just before segment border formation. The transcriptional on-off cycle is linked to the segmentation clock. In our current study, we show that a T-box transcription factor, Tbx6, is essential for Mesp2 expression. Tbx6 directly binds to the Mesp2 gene upstream region and mediates Notch signaling, and subsequent Mesp2 transcription, in the anterior presomitic mesoderm. Our data therefore reveal that a mechanism, via Tbx6-dependent Notch signaling, acts on the transcriptional regulation of Mesp2. This finding uncovers an additional component of the interacting network of various signaling pathways that are involved in somitogenesis.