The Homoscleromorph sponge Oscarella lobularis, a promising sponge model in evolutionary and developmental biology Model sponge Oscarelia lobularis
The Homoscleromorph sponge Oscarella lobularis, a promising sponge model in evolutionary and developmental biology Model sponge Oscarelia lobularis
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DOI：
10.1002/bies.080058
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发表时间：
2009-01-01
期刊：
影响因子：
4
通讯作者：
Vacelet, Jean
中科院分区：
文献类型：
--
作者：
Ereskovsky, Alexander V.;Borchiellini, Carole;Vacelet, Jean
海绵在后生动物系统发育树的基部发生分支，据信由四个不同的谱系组成，它们之间的关系仍不确定。实际上，一些分子研究提出，同骨海绵类可能是海绵的第四个谱系，不同于它们传统上被归类的寻常海绵纲。它们具有许多区别于其他海绵的特征，并且更能让人联想到真后生动物的特征。值得注意的是，它们是唯一拥有含Ⅳ型胶原蛋白的基底膜和特殊细胞连接的海绵，因此具有真正的上皮组织。在同骨海绵类中，我们选择了叶状软海绵作为模式物种。这种常见且容易获取的海绵具有相对简单的组织学和细胞组成、无骨骼以及非常明显的上皮结构等特征。在这篇综述中，我们探讨了使叶状软海绵成为进化和发育研究中有前景的同骨海绵类模式海绵的具体特征。
Sponges branch basally in the metazoan phylogenetic tree and are believed to be composed of four distinct lineages with still uncertain relationships. Indeed, some molecular studies propose that Homoscleromorpha may be a fourth Sponge lineage, distinct from Demospongiae in which they were traditionally classified. They harbour many features that distinguish them from other sponges and are more evocative of those of the eumetazoans. They are notably the only sponges to possess a basement membrane with Collagen IV and specialized cell-junctions, thus possessing true epithelia. Among Homoscleromorphs, we have chosen Oscarella lobularis as a model species. This common and easily accessible sponge is characterized by relatively simple histology and cell composition, absence of skeleton, and strongly pronounced epithelial structure. In this review, we explore the specific features that make O. lobularis a promising homoscleromorph sponge model for evolutionary and developmental researches.