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首页> 外文期刊>The international journal of developmental biology >Planarian embryology in the era of comparative developmental biology
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Planarian embryology in the era of comparative developmental biology

机译：比较发育生物学时代的Planarian胚胎学

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摘要

During the last decade, the field of evolutionary developmental biology (evo-devo) has emerged as a major research discipline in modern biology and an essential approach to understanding evolutionary relationships in the animal kingdom. At the same time, planarians have become a useful and important model with which to address basic questions regarding the molecular and cellular basis of regeneration, tissue repair and stem cells in adult organisms. Nevertheless, little attention has been paid to their embryonic development, even though this provides a unique opportunity for studying how molecular developmental mechanisms are redeployed during adult regeneration or the independent losses of spiral cleavage that took place in different lophotrochozoan lineages. In this paper, we review the most relevant works on planarian embryos from a historical point of view. In doing so, we highlight the questions that have recurrently intrigued researchers, most of which remain unanswered. Finally, we present a comprehensive scenario for planarian embryogenesis in an attempt to provide a testable hypothesis that will help to bridge the gap between this divergent mode of development, the ancestral canonical spiral cleavage, and adult planarian regeneration.
机译：在过去的十年中，进化发展生物学（evo-devo）领域已成为现代生物学的主要研究学科，并且是理解动物界进化关系的一种必不可少的方法。同时，涡虫已成为有用和重要的模型，用以解决有关成年生物中再生，组织修复和干细胞的分子和细胞基础的基本问题。尽管如此，很少关注它们的胚胎发育，尽管这为研究如何在成年再生过程中重新部署分子发育机制或在不同的次滋养体家族中独立发生螺旋分裂丧失提供了独特的机会。在本文中，我们从历史的角度回顾了有关涡虫胚胎的最相关著作。在此过程中，我们重点介绍了引起研究人员反复关注的问题，其中大多数问题仍未得到解答。最后，我们提出了一个关于涡虫胚胎发生的综合方案，试图提供一个可检验的假设，这将有助于弥合这种不同的发展模式，祖先规范的螺旋分裂与成年涡虫的再生之间的差距。

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