In Amphioxus Embryos, Some Neural Tube Cells Resemble Differentiating Coronet Cells of Fishes and Tunicates
In Amphioxus Embryos, Some Neural Tube Cells Resemble Differentiating Coronet Cells of Fishes and Tunicates
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在文昌鱼胚胎中,一些神经管细胞类似于鱼类和被囊类动物分化的冠状细胞
DOI:
10.1086/724581
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Mansfield, Jennifer H.
中科院分区:
文献类型:
--
作者:
Holland, Nicholas D.;Mansfield, Jennifer H.
For neurula embryos of amphioxus (chordate subphylum Cephalochordata), the anterior region of the neural tube was studied with transmission electron microscopy. This survey demonstrated previously unreported cells, each characterized by a cilium bearing on its shaft a protruding lateral bubble packed with vesicles. Such cilia resemble those known from immature coronet cells in other chordates—namely, fishes in the Vertebrata and ascidians and appendicularians in the Tunicata. This wide occurrence of coronet-like cells raises questions about their possible homologies within the phylum Chordata. When considered at the level of the whole cell, such homology is not well supported. For example, the fish cells are generally thought to be glia, while the tunicate cells are considered to be neurons; moreover, cytoplasmic smooth endoplasmic reticulum, which is predominant in the former, is undetectable in the latter. In contrast, a more convincing case for homology can be made by limiting comparisons to the cell apices with their modified cilia. In addition to the fine-structural similarities between fishes and tunicates already mentioned, nonvisual opsins have been found associated with the vesicles in the modified cilia of both groups. Such opsins are thought to link photoreception to endocrine output controlling behavior. Further work would be needed to test the idea that the amphioxus diencephalic cells with lateral bubble cilia might similarly be opsin rich and could provide insights into the evolutionary history of the coronet cells within the phylum Chordata.
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影响因子:
4.1
作者:
Mansfield JH;Haller E;Holland ND;Brent AE
通讯作者:
Brent AE
影响因子:
2.7
作者:
Konno, Alu;Kaizu, Maiko;Inaba, Kazuo
通讯作者:
Inaba, Kazuo
DOI:
--
发表时间:
1975
期刊:
影响因子:
--
作者:
R. Olsson
通讯作者:
R. Olsson
影响因子:
1.5
作者:
A. Corujo;I. Rodríguez;R. Anadón
通讯作者:
R. Anadón
DOI:
--
发表时间:
1988
期刊:
影响因子:
--
作者:
M. I. Rodriguez;R. Anadón
通讯作者:
R. Anadón