Hidden cell diversity in Placozoa: ultrastructural insights from Hoilungia hongkongensis.

Details

Serval ID
serval:BIB_C466BC2969FF
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Hidden cell diversity in Placozoa: ultrastructural insights from Hoilungia hongkongensis.
Journal
Cell and tissue research
Author(s)
Romanova D.Y., Varoqueaux F., Daraspe J., Nikitin M.A., Eitel M., Fasshauer D., Moroz L.L.
ISSN
1432-0878 (Electronic)
ISSN-L
0302-766X
Publication state
Published
Issued date
09/2021
Peer-reviewed
Oui
Volume
385
Number
3
Pages
623-637
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
From a morphological point of view, placozoans are among the most simple free-living animals. This enigmatic phylum is critical for our understanding of the evolution of animals and their cell types. Their millimeter-sized, disc-like bodies consist of only three cell layers that are shaped by roughly seven major cell types. Placozoans lack muscle cells and neurons but are able to move using their ciliated lower surface and take up food in a highly coordinated manner. Intriguingly, the genome of Trichoplax adhaerens, the founding member of the enigmatic phylum, has disclosed a surprising level of genetic complexity. Moreover, recent molecular and functional investigations have uncovered a much larger, so-far hidden cell-type diversity. Here, we have extended the microanatomical characterization of a recently described placozoan species-Hoilungia hongkongensis. In H. hongkongensis, we recognized the established canonical three-layered placozoan body plan but also came across several morphologically distinct and potentially novel cell types, among them novel gland cells and "shiny spheres"-bearing cells at the upper epithelium. Thus, the diversity of cell types in placozoans is indeed higher than anticipated.
Keywords
Cell types, Functional anatomy, Hoilungia hongkongensis, Morphology, Physiology, Placozoa, Signaling, Trichoplax adhaerens
Pubmed
Web of science
Create date
26/04/2021 9:49
Last modification date
05/01/2022 7:36
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