Home > Publications database > The contractile sponge epithelium sensu lato - body contraction of the demosponge Tethya wilhelma is mediated by the pinacoderm > print

001     92851
005     20250730163901.0
024 7 _ |a pmid:21525315
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024 7 _ |a 1477-9145
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024 7 _ |a 0022-0949
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024 7 _ |a 10.1242/jeb.049148
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041 _ _ |a eng
082 _ _ |a 570
100 1 _ |a Nickel, M.
110 1 _ |a DESY
|b Experiments with synchrotron radiation
245 _ _ |a The contractile sponge epithelium sensu lato - body contraction of the demosponge Tethya wilhelma is mediated by the pinacoderm
260 _ _ |a Cambridge
|c 2011
|b Company of Biologists, HighWire Press
300 _ _ |a 1692-1698
336 7 _ |a Journal Article
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336 7 _ |a article
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336 7 _ |a Journal Article
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336 7 _ |a ARTICLE
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440 _ 0 |a J. Exp. Biol.
|0 PERI:(DE-600)1482461-9
|v 214
|x 0022-0949
500 _ _ |3 Converted on 2013-05-30 14:35
500 _ _ |3 Converted on 2013-06-21 19:21
520 _ _ |a Sponges constitute one of the two metazoan phyla that are able to contract their bodies despite a complete lack of muscle cells. Two competing hypotheses on the mechanisms behind this have been postulated to date: (1) mesohyl-mediated contraction originating from fusiform smooth muscle-like actinocytes ('myocytes') and (2) epidermal contraction originating in pinacocytes. No direct support exists for either hypothesis. The question of agonist-antagonist interaction in sponge contraction seems to have been completely neglected so far. In the present study we addressed this by studying sponge contraction kinetics. We also tested both hypotheses by carrying out volumetric studies of 3D synchrotron radiation-based x-ray microtomography data obtained from contracted and expanded specimens of Tethya wilhelma. Our results support the pinacoderm contraction hypothesis. Should mesohyl contraction be present, it is likely to be part of the antagonist system. We conclude that epithelial contraction plays a major role in sponges. Contractile epithelia sensu lato may be regarded as part of the ground pattern of the Metazoa.
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588 _ _ |a Dataset connected to Pubmed
650 _ 2 |a Animals
|2 MeSH
650 _ 2 |a Biomechanics
|2 MeSH
650 _ 2 |a Body Weights and Measures
|2 MeSH
650 _ 2 |a Epidermis: physiology
|2 MeSH
650 _ 2 |a Epidermis: ultrastructure
|2 MeSH
650 _ 2 |a Epithelium: physiology
|2 MeSH
650 _ 2 |a Epithelium: ultrastructure
|2 MeSH
650 _ 2 |a Microscopy, Electron, Scanning
|2 MeSH
650 _ 2 |a Movement: physiology
|2 MeSH
650 _ 2 |a Porifera: physiology
|2 MeSH
650 _ 2 |a Synchrotrons
|2 MeSH
650 _ 2 |a X-Ray Microtomography
|2 MeSH
693 _ _ |a DORIS III
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700 1 _ |a Scheer, C.
700 1 _ |a Hammel, J. U.
700 1 _ |a Herzen, J.
700 1 _ |a Beckmann, F.
773 _ _ |a 10.1242/jeb.049148
|g Vol. 214, p. 1692-1698
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856 4 0 |u http://jeb.biologists.org/content/214/10/1692.full
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