Contributions of 5'HoxA/D regulation to actinodin evolution and the fin-to-limb transition.

Contributions of 5'HoxA/D regulation to actinodin evolution and the fin-to-limb transition.
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5HoxA/D 调节对放线菌素进化和鳍到肢过渡的贡献。

DOI:
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发表时间:
2018
影响因子:
0.7
通讯作者:
M. Akimenko
M. Akimenko
中科院分区:
生物学4区
文献类型:
--
作者:
R. L. Lalonde;M. Akimenko

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四足动物的四肢从成对的鱼鳍的演变包括主要的变化,apepellular皮肤和endochonterioskeleton骨骼。鱼鳍鳍条消失,软骨内骨被修改和加工,形成所有四足动物四肢共同的三个不同部分:茎足动物,zeugopod和autopod。确定有助于这些形态变化的分子机制,为我们自己的进化史提供了独特的见解。这篇综述首先总结了以前确定的顺式作用的调控元件的5 'HoxA/D基因和actinodin 1,使用转基因交换实验之间的鱼和四足动物进行了测试。保守的监管网络提供的证据远端鳍结构和autopod之间的深同源性,而不同的监管策略突出了潜在的分子机制,促成了鳍肢过渡。接下来,我们总结了进行功能分析,以概括鱼四足动物分歧的监管策略,然后讨论其潜在的形态学后果在肢体进化的研究。最后,我们还讨论了在这里的一些优点和缺点,使用斑马鱼研究分子和形态学的变化,在鳍肢过渡。
The evolution of tetrapod limbs from paired fish fins comprised major changes to the appendicular dermal and endochondral skeleton. Fish fin rays were lost, and the endochondral bone was modified and elaborated to form three distinct segments common to all tetrapod limbs: the stylopod, the zeugopod and the autopod. Identifying the molecular mechanisms that contributed to these morphological changes presents a unique insight into our own evolutionary history. This review first summarizes previously identified cis-acting regulatory elements for the 5'HoxA/D genes and actinodin1 that were tested using transgenic swap experiments between fish and tetrapods. Conserved regulatory networks provide evidence for a deep homology between distal fin structures and the autopod, while diverging regulatory strategies highlight potential molecular mechanisms that contributed to the fin-to-limb transition. Next, we summarize studies that performed functional analysis to recapitulate fish-tetrapod diverging regulatory strategies and then discuss their potential morphological consequences during limb evolution. Finally, we also discuss here some of the advantages and disadvantages of using zebrafish to study molecular and morphological changes during the fin-to-limb transition.
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