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Evolutionary origins of Notch signaling in early development.

机译:Notch信号在早期发展中的进化起源。

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Notch signaling is known to play key roles in early embryonic development and in the specification or patterning of germ layers in several lower organisms. Thus it is surprising that the removal of maternal and zygotic protein O-fucosyltransferase 1 (Pofut1), an essential component of the canonical Notch signaling pathway, does not affect early embryogenesis in the mouse. Mouse embryos lacking Pofut1 develop normally through blastogenesis to E8.0 when all three germ layers have formed. Here we summarize roles for Notch signaling in early embryonic development of several species, and discuss the potential evolutionary origins of these roles. We propose that Notch signaling might have first been used in the common ancestor of the metazoa for certain advanced developmental processes such as segmentation, and only later in evolution been coopted for use at early stages of embryogenesis in some organisms.
机译:已知,Notch信号在早期胚胎发育以及几种低等生物的胚层规格或模式中起关键作用。因此,令人惊讶的是,母本和合子蛋白O-岩藻糖基转移酶1(Pofut1)的删除,即Notch信号传导途径的基本组成部分,不会影响小鼠的早期胚胎发生。当所有三个胚层都形成后,缺乏Pofut1的小鼠胚胎会通过胚细胞发育正常发育至E8.0。在这里,我们总结了Notch信号在几种物种的早期胚胎发育中的作用,并讨论了这些作用的潜在进化起源。我们提出,Notch信号可能首先在后生动物的共同祖先中用于某些先进的发育过程,例如分段,并且只有在进化的后期才被选择用于某些生物体的胚胎发生的早期阶段。

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