The central nervous system of sea cucumbers (Echinodermata: Holothuroidea) shows positive immunostaining for a chordate glial secretion
<p>Abstract</p> <p>Background</p> <p>Echinoderms and chordates belong to the same monophyletic taxon, the Deuterostomia. In spite of significant differences in body plan organization, the two phyla may share more common traits than was thought previously. Of particular...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
BMC
2009-06-01
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| Series: | Frontiers in Zoology |
| Online Access: | http://www.frontiersinzoology.com/content/6/1/11 |
| _version_ | 1818120311654055936 |
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| author | Grondona Jesus M Naumann Wilfried W Aschauer Beate Heinzeller Thomas Zueva Olga R Mashanov Vladimir S Cifuentes Manuel Garcia-Arraras Jose E |
| author_facet | Grondona Jesus M Naumann Wilfried W Aschauer Beate Heinzeller Thomas Zueva Olga R Mashanov Vladimir S Cifuentes Manuel Garcia-Arraras Jose E |
| author_sort | Grondona Jesus M |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>Echinoderms and chordates belong to the same monophyletic taxon, the Deuterostomia. In spite of significant differences in body plan organization, the two phyla may share more common traits than was thought previously. Of particular interest are the common features in the organization of the central nervous system. The present study employs two polyclonal antisera raised against bovine Reissner's substance (RS), a secretory product produced by glial cells of the subcomissural organ, to study RS-like immunoreactivity in the central nervous system of sea cucumbers.</p> <p>Results</p> <p>In the ectoneural division of the nervous system, both antisera recognize the content of secretory vacuoles in the apical cytoplasm of the radial glia-like cells of the neuroepithelium and in the flattened glial cells of the non-neural epineural roof epithelium. The secreted immunopositive material seems to form a thin layer covering the cell apices. There is no accumulation of the immunoreactive material on the apical surface of the hyponeural neuroepithelium or the hyponeural roof epithelium. Besides labelling the supporting cells and flattened glial cells of the epineural roof epithelium, both anti-RS antisera reveal a previously unknown putative glial cell type within the neural parenchyma of the holothurian nervous system.</p> <p>Conclusion</p> <p>Our results show that: a) the glial cells of the holothurian tubular nervous system produce a material similar to Reissner's substance known to be synthesized by secretory glial cells in all chordates studied so far; b) the nervous system of sea cucumbers shows a previously unrealized complexity of glial organization. Our findings also provide significant clues for interpretation of the evolution of the nervous system in the Deuterostomia. It is suggested that echinoderms and chordates might have inherited the RS-producing radial glial cell type from the central nervous system of their common ancestor, i.e., the last common ancestor of all the Deuterostomia.</p> |
| first_indexed | 2024-12-11T05:24:05Z |
| format | Article |
| id | doaj.art-583adc1b62f1461ab7012691bef55e7d |
| institution | Directory Open Access Journal |
| issn | 1742-9994 |
| language | English |
| last_indexed | 2024-12-11T05:24:05Z |
| publishDate | 2009-06-01 |
| publisher | BMC |
| record_format | Article |
| series | Frontiers in Zoology |
| spelling | doaj.art-583adc1b62f1461ab7012691bef55e7d2022-12-22T01:19:37ZengBMCFrontiers in Zoology1742-99942009-06-01611110.1186/1742-9994-6-11The central nervous system of sea cucumbers (Echinodermata: Holothuroidea) shows positive immunostaining for a chordate glial secretionGrondona Jesus MNaumann Wilfried WAschauer BeateHeinzeller ThomasZueva Olga RMashanov Vladimir SCifuentes ManuelGarcia-Arraras Jose E<p>Abstract</p> <p>Background</p> <p>Echinoderms and chordates belong to the same monophyletic taxon, the Deuterostomia. In spite of significant differences in body plan organization, the two phyla may share more common traits than was thought previously. Of particular interest are the common features in the organization of the central nervous system. The present study employs two polyclonal antisera raised against bovine Reissner's substance (RS), a secretory product produced by glial cells of the subcomissural organ, to study RS-like immunoreactivity in the central nervous system of sea cucumbers.</p> <p>Results</p> <p>In the ectoneural division of the nervous system, both antisera recognize the content of secretory vacuoles in the apical cytoplasm of the radial glia-like cells of the neuroepithelium and in the flattened glial cells of the non-neural epineural roof epithelium. The secreted immunopositive material seems to form a thin layer covering the cell apices. There is no accumulation of the immunoreactive material on the apical surface of the hyponeural neuroepithelium or the hyponeural roof epithelium. Besides labelling the supporting cells and flattened glial cells of the epineural roof epithelium, both anti-RS antisera reveal a previously unknown putative glial cell type within the neural parenchyma of the holothurian nervous system.</p> <p>Conclusion</p> <p>Our results show that: a) the glial cells of the holothurian tubular nervous system produce a material similar to Reissner's substance known to be synthesized by secretory glial cells in all chordates studied so far; b) the nervous system of sea cucumbers shows a previously unrealized complexity of glial organization. Our findings also provide significant clues for interpretation of the evolution of the nervous system in the Deuterostomia. It is suggested that echinoderms and chordates might have inherited the RS-producing radial glial cell type from the central nervous system of their common ancestor, i.e., the last common ancestor of all the Deuterostomia.</p>http://www.frontiersinzoology.com/content/6/1/11 |
| spellingShingle | Grondona Jesus M Naumann Wilfried W Aschauer Beate Heinzeller Thomas Zueva Olga R Mashanov Vladimir S Cifuentes Manuel Garcia-Arraras Jose E The central nervous system of sea cucumbers (Echinodermata: Holothuroidea) shows positive immunostaining for a chordate glial secretion Frontiers in Zoology |
| title | The central nervous system of sea cucumbers (Echinodermata: Holothuroidea) shows positive immunostaining for a chordate glial secretion |
| title_full | The central nervous system of sea cucumbers (Echinodermata: Holothuroidea) shows positive immunostaining for a chordate glial secretion |
| title_fullStr | The central nervous system of sea cucumbers (Echinodermata: Holothuroidea) shows positive immunostaining for a chordate glial secretion |
| title_full_unstemmed | The central nervous system of sea cucumbers (Echinodermata: Holothuroidea) shows positive immunostaining for a chordate glial secretion |
| title_short | The central nervous system of sea cucumbers (Echinodermata: Holothuroidea) shows positive immunostaining for a chordate glial secretion |
| title_sort | central nervous system of sea cucumbers echinodermata holothuroidea shows positive immunostaining for a chordate glial secretion |
| url | http://www.frontiersinzoology.com/content/6/1/11 |
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