Germline cell formation and gonad regeneration in solitary and colonial ascidians.
Germline cell formation and gonad regeneration in solitary and colonial ascidians.
复制标题
孤立和群体海鞘的生殖细胞形成和性腺再生。
DOI：
10.1002/dvdy.22542
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
DeTomaso,AnthonyW
中科院分区：
文献类型：
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作者：
Kawamura,Kaz;Tiozzo,Stefano;Manni,Lucia;Sunanaga,Takeshi;Burighel,Paolo;DeTomaso,AnthonyW
海鞘生殖腺的形态在不同物种间非常相似。睾丸由数量不等的睾丸卵泡组成;卵巢由增厚的输卵管组成，形成具有雌性生殖细胞干细胞的生殖上皮，但葡萄状海鞘除外。卵母细胞中伴随着生殖细胞起源的特殊辅助细胞。利用vasahologies作为分子标记，生殖系前体细胞可以追溯到胚胎最后的卵裂球，并在一些孤生和群体海鞘的尾芽胚胎的尾部发现。在Ciona中，它们随后位于幼虫尾部，而在菌落中，表达botryllid ascidiansvasa的细胞在尾部变得模糊不清。最近的证据表明，海鞘生殖细胞可以从胚胎生殖细胞以外的细胞再生。胚胎严格的生殖细胞谱系和性腺形成胚后的灵活性的合奏进行了讨论。Developmental Dynamics 240：299-308，2011.© 2011 Wiley利斯公司
The morphology of ascidian gonad is very similar among species. The testis consists of variable number of testicular follicles; the ovary consists of ovarian tubes that are thickened forming the germinal epithelium with stem cells for female germ cells with the exception of botryllid ascidians. Peculiar accessory cells that would be germline in origin accompany the oocytes. Usingvasahomologues as a molecular marker, germline precursor cells can be traced back to the embryonic posterior‐most blastomeres and are found in the tail of tailbud embryo in some solitary and colonial ascidians. InCiona, they are subsequently located in the larval tail, while in colonial botryllid ascidiansvasa‐expressing cells become obscure in the tail. Recent evidence suggests that ascidian germ cells can regenerate from cells other than embryonic germline. An ensemble of the embryonic stringency of germ cell lineage and the postembryonic flexibility of gonad formation is discussed. Developmental Dynamics 240:299–308, 2011. © 2011 Wiley‐Liss, Inc.