Stichopin-containing nerves and secretory cells specific to connective tissues of the sea cucumber
| Autor: | Apurba Kumar Saha, Masaki Tamori, Sukumar Chandra Noskor, Akira Matsuno, Tatsuo Motokawa, Yoshitaka Kobayakawa, Osamu Koizumi, Yoko Nakajima |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Dense connective tissue
Pathology medicine.medical_specialty Connective tissue Biology General Biochemistry Genetics and Molecular Biology Cloaca Dermis Paracrine Communication medicine Animals bioactive peptide stichopin catch connective tissue sea cucumber echinoderm Connective Tissue Cells General Environmental Science Antiserum General Immunology and Microbiology Neuropeptides General Medicine Anatomy biology.organism_classification Immunohistochemistry Gastrointestinal Tract medicine.anatomical_structure Echinoderm Connective Tissue Stichopus Reticular connective tissue Intercellular Signaling Peptides and Proteins General Agricultural and Biological Sciences Tube feet Research Article |
| Zdroj: | PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES. 274(1623):2279-2285 |
| ISSN: | 0962-8452 |
| Popis: | Stichopin, a 17-amino acid peptide isolated from a sea cucumber, affects the stiffness change of the body-wall catch connective tissues and the contraction of the body-wall muscles. The localization of stichopin in sea cucumbers was studied by indirect immunohistochemistry using antiserum against stichopin. Double staining was performed with both stichopin antiserum and 1E11, the monoclonal antibody specific to echinoderm nerves. A stichopin-like immunoreactivity (stichopin-LI) was exclusively found in the connective tissues of various organs. Many fibres and cells with processes were stained by both the anti-stichopin antibody and 1E11.They were found in the body-wall dermis and the connective tissue layer of the cloacae and were suggested to be connective tissue-specific nerves. Oval cells with stichopin-LI (OCS) without processes were found in the body-wall dermis, the connective tissue sheath of the longitudinal body-wall muscles, the connective tissue layer of the tube feet and tentacles, and the connective tissue in the radial nerves separating the ectoneural part from the hyponeural part. Electron microscopic observations of the OCSs in the radial nerves showed that they were secretory cells. The OCSs were located either near the well-defined neural structures or near the water-filled cavities, such as the epineural sinus and the canals of the tube feet. The location near the water-filled cavities might suggest that stichopin was secreted into these cavities to function as a hormone. |
| Databáze: | OpenAIRE |
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