Coenocystic oogenesis - modification of or deviation from the germ cell cyst paradigm?

Malgorzata Kloc
{"title":"Coenocystic oogenesis - modification of or deviation from the germ cell cyst paradigm?","authors":"Malgorzata Kloc","doi":"10.1387/ijdb.240064mk","DOIUrl":null,"url":null,"abstract":"<p><p>Invertebrate and vertebrate species have many unusual cellular structures, such as long- or short-lived cell-in-cell structures and coenocytes. Coenocytes (often incorrectly described as syncytia) are multinuclear cells derived, unlike syncytia, not from the fusion of multiple cells but from multiple nuclear divisions without cytokinesis. An example of a somatic coenocyte is the coenocytic blastoderm in <i>Drosophila.</i> An astonishing property of coenocytes is the ability to differentiate the nuclei sharing a common cytoplasm into different subpopulations with different fate trajectories. An example of a germline coenocyte is the oogenic precursor of appendicularian tunicates, which shares many features with the somatic coenocyte of <i>Drosophila.</i> The germline coenocyte (coenocyst) is quite an unexpected structure because in most animals, including <i>Drosophila, Xenopus</i>, and mice, oogenesis proceeds within a group (cyst, nest) of sibling cells (cystocytes) connected by the intercellular bridges (ring canals, RCs) derived from multiple divisions with incomplete cytokinesis of a progenitor cell called the cystoblast. Here, I discuss the differences and similarities between cystocyte-based and coenocyst-based oogenesis, and the resemblance of coenocystic oogenesis to coenocytic somatic blastoderm in <i>Drosophila.</i> I also describe cell-in-cell structures that although not mechanistically, cytologically, or molecularly connected to somatic or germline coenocytes, are both unorthodox and intriguing cytological phenomena rarely covered by scientific literature.</p>","PeriodicalId":94228,"journal":{"name":"The International journal of developmental biology","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The International journal of developmental biology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1387/ijdb.240064mk","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

Abstract

Invertebrate and vertebrate species have many unusual cellular structures, such as long- or short-lived cell-in-cell structures and coenocytes. Coenocytes (often incorrectly described as syncytia) are multinuclear cells derived, unlike syncytia, not from the fusion of multiple cells but from multiple nuclear divisions without cytokinesis. An example of a somatic coenocyte is the coenocytic blastoderm in Drosophila. An astonishing property of coenocytes is the ability to differentiate the nuclei sharing a common cytoplasm into different subpopulations with different fate trajectories. An example of a germline coenocyte is the oogenic precursor of appendicularian tunicates, which shares many features with the somatic coenocyte of Drosophila. The germline coenocyte (coenocyst) is quite an unexpected structure because in most animals, including Drosophila, Xenopus, and mice, oogenesis proceeds within a group (cyst, nest) of sibling cells (cystocytes) connected by the intercellular bridges (ring canals, RCs) derived from multiple divisions with incomplete cytokinesis of a progenitor cell called the cystoblast. Here, I discuss the differences and similarities between cystocyte-based and coenocyst-based oogenesis, and the resemblance of coenocystic oogenesis to coenocytic somatic blastoderm in Drosophila. I also describe cell-in-cell structures that although not mechanistically, cytologically, or molecularly connected to somatic or germline coenocytes, are both unorthodox and intriguing cytological phenomena rarely covered by scientific literature.

同囊卵生--是对生殖细胞囊范式的修正还是偏离?
无脊椎动物和脊椎动物有许多不寻常的细胞结构,例如长寿或短寿的细胞内结构和同源细胞。同源细胞(通常被错误地描述为合胞体)是多核细胞,与合胞体不同,它不是由多个细胞融合而成,而是由多个没有细胞分裂的核分裂而成。果蝇的合核胚层就是体细胞合核的一个例子。同源细胞的一个惊人特性是能够将具有共同细胞质的细胞核分化成具有不同命运轨迹的不同亚群。生殖系同源细胞的一个例子是阑尾鳞茎类动物的卵原前体,它与果蝇的体细胞同源细胞有许多共同之处。生殖同源细胞(同源囊胚)是一种非常出人意料的结构,因为在大多数动物(包括果蝇、爪蟾和小鼠)中,卵子发生都是在同胞细胞(囊胚)群(囊肿、巢)内进行的,同胞细胞由细胞间桥(环管、RC)连接,环管是由一种叫做囊胚细胞的原代细胞在细胞分裂不完全的情况下多次分裂产生的。在这里,我将讨论基于囊胚的卵子发生与基于同源囊胚的卵子发生之间的异同,以及同源囊胚的卵子发生与果蝇同源体细胞胚泡的相似性。我还描述了细胞内结构,虽然这些结构与体细胞或生殖细胞在机械学、细胞学或分子学上没有联系,但它们都是科学文献中很少涉及的非正统和有趣的细胞学现象。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信