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Establishment of the Axial Polarity and Cell Fate in Metazoa via Canonical Wnt Signaling: New Insights from Sponges and Annelids

机译:通过Canonical WNT信号传导在Metazoa中建立轴向极性和细胞命运:海绵和环节的新见解

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摘要

In this paper, the role of the Wnt/-catenin pathway in the establishment of the body plan in multicellular animals has been analyzed. We demonstrated that at different stages of development the Wnt signaling cascade is involved in several directly unrelated processes such as inner germ layer specification, anterior-posterior axis patterning, and terminal growth. Bioinformatics analysis revealed the independent divergence of Wnt ligands in basal Metazoa and conservation of Wnt subfamilies within the Cnidaria + Bilateria clade. Polarized expression of Wnt ligands in sponge and annelid larvae has been shown, thus confirming the applicability of the existing model of the main body axis patterning to two more taxa. The -catenin localization and inhibitory analysis have provided evidence of the unlikely role for Wnt pathway in endomesoderm determination in nereid polychaetes. The evolutionary trend to establish alternative mechanisms even for key events such as segregation of germ layers has been observed in the case of more determinative ontogeny and predominance of autonomous specification, as exemplified by the heteroquadrant (unequal) type of spiral development.
机译:在本文中,分析了Wnt / -catenin途径在多细胞动物中体育计划中的作用。我们证明,在不同的发展阶段,WNT信号级联涉及几种直接无关的过程,例如内部种系规范,前后轴图案化和终端生长。生物信息学分析揭示了基础美唑的WNT配体的独立分歧和CNIDaria + Bilateria Clade中的Wnt亚属植物的保护。已经示出了海绵和环形幼虫的Wnt配体的偏振表达,从而证实了现有的主体轴模型的适用性图案化了另外两个分类群。 -Catenin定位和抑制分析已经提供了在整体聚芯片中的Neemesoderm测定中的WNT途径不太可能的作用。在更具决定性的组织化和自主规范的偏好的情况下,已经观察到甚至是诸如毒细胞分离的关键事件的替代机制的进化趋势,如异质调整(不相等)类型的螺旋发育。

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  • 来源
    《Biology Bulletin》 |2019年第1期|14-25|共12页
  • 作者单位

    St Petersburg State Univ St Petersburg 199034 Russia;

    St Petersburg State Univ St Petersburg 199034 Russia;

    St Petersburg State Univ St Petersburg 199034 Russia;

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  • 正文语种 eng
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