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@ARTICLE{Nickel:92851,
      author       = {Nickel, M. and Scheer, C. and Hammel, J. U. and Herzen, J.
                      and Beckmann, F. and DESY},
      title        = {{T}he contractile sponge epithelium sensu lato - body
                      contraction of the demosponge {T}ethya wilhelma is mediated
                      by the pinacoderm},
      journal      = {The journal of experimental biology},
      volume       = {214},
      issn         = {0022-0949},
      address      = {Cambridge},
      publisher    = {Company of Biologists, HighWire Press},
      reportid     = {PHPPUBDB-17502},
      pages        = {1692-1698},
      year         = {2011},
      abstract     = {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.},
      keywords     = {Animals / Biomechanics / Body Weights and Measures /
                      Epidermis: physiology / Epidermis: ultrastructure /
                      Epithelium: physiology / Epithelium: ultrastructure /
                      Microscopy, Electron, Scanning / Movement: physiology /
                      Porifera: physiology / Synchrotrons / X-Ray Microtomography},
      cin          = {HASYLAB / GKSS},
      ddc          = {570},
      cid          = {$I:(DE-H253)HASYLAB_-2012_-20130307$ /
                      I:(DE-H253)HZG-20120731},
      pnm          = {DORIS Beamline BW2 (POF2-54G13) / FS-Proposal: I-20051083
                      (I-20051083) / FS-Proposal: I-20060252 (I-20060252)},
      pid          = {G:(DE-H253)POF2-BW2-20130405 / G:(DE-H253)I-20051083 /
                      G:(DE-H253)I-20060252},
      experiment   = {EXP:(DE-H253)D-BW2-20150101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:21525315},
      UT           = {WOS:000289935400013},
      doi          = {10.1242/jeb.049148},
      url          = {https://bib-pubdb1.desy.de/record/92851},
}