Mechanisms of cnidocyte development in the moon jellyfish Aurelia.
Journal
Evolution & development
ISSN: 1525-142X
Titre abrégé: Evol Dev
Pays: United States
ID NLM: 100883432
Informations de publication
Date de publication:
03 2019
03 2019
Historique:
pubmed:
10
1
2019
medline:
26
3
2019
entrez:
10
1
2019
Statut:
ppublish
Résumé
Stinging cells called cnidocytes are a defining trait of the cnidarians (sea anemones, corals, jellyfish, and their relatives). In hydrozoan cnidarians such as Hydra, cnidocytes develop from interstitial stem cells set aside in the ectoderm. It is less clear how cnidocytes develop outside the Hydrozoa, as other cnidarians appear to lack interstitial stem cells. We addressed this question by studying cnidogenesis in the moon jellyfish (Aurelia) through the visualization of minicollagen-a protein associated with cnidocyte development-as well as transmission electron microscopy. We discovered that developing cnidoblasts are rare or absent in feeding structures rich in mature cnidocytes, such as tentacles and lappets. Using transmission electron microscopy, we determined that the progenitors of cnidocytes have traits consistent with epitheliomuscular cells. Our data suggests a dynamic where cnidocytes develop at high concentrations in the epithelium of more proximal regions, and subsequently migrate to more distal regions where they exhibit high usage and turnover. Similar to some anthozoans, cnidocytes in Aurelia do not appear to be generated by interstitial stem cells; instead, epitheliomuscular cells appear to be the progenitor cell type. This observation polarizes the evolution of cnidogenesis, and raises the question of how interstitial stem cells came to regulate cnidogenesis in hydrozoans.
Identifiants
pubmed: 30623570
doi: 10.1111/ede.12278
pmc: PMC7211293
mid: NIHMS1579566
doi:
Substances chimiques
Collagen
9007-34-5
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
72-81Subventions
Organisme : NHGRI NIH HHS
ID : T32 HG002536
Pays : United States
Organisme : NASA
ID : NAI: Foundations of Complex Life
Pays : United States
Organisme : NIH HHS
ID : T32HG002536
Pays : United States
Informations de copyright
© 2019 Wiley Periodicals, Inc.
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