Document Detail


Neuroepithelial bodies and solitary neuroendocrine cells in the lungs of amphibia.
MedLine Citation:
PMID:  9144619     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In the lungs of 12 species of Amphibia investigated so far, solitary neuroendocrine (NE) cells, as well as groups of these cells called "neuroepithelial bodies" (NEB), are observed. They occur in the position strategic to monitoring gas composition, mainly in the ciliated epithelium of the apical part of the septa. A great diversity in the structure of NEB is observed. The NE cells and NEB in Amphibia are predominantly of the "closed type," separated from the air space by a thin cytoplasmic layer of ciliated cells, goblet cells or pneumocytes. In two species, Bufo marinus and Ambystoma tigrinum, the "open type" of NEB occur, where NEB communicate with the air space, by apical cells in Bufo and type II NE cells in Ambystoma. Both types of cells possess single atypical cilia with an 8+1 microtubule arrangement and microvilli on the free surface. Single and grouped NE cells are characterized by small dense core vesicles (DCV) dispersed in the cytoplasm. In Salamandra and Ambystoma the second type of NE cells with large DCV are observed. The DCV represent sites of storage of serotonin and several neuropeptides. The basal parts of NEB and of some solitary cells are invested by the intraepithelial sensory nerve terminals, both afferent and efferent morphologically. In the lungs of Amphibia, similarly to other vertebrates, NE cells, which act as endocrine/paracrine receptors, form epithelial endocrine systems.
Authors:
L Goniakowska-Witalińska
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Microscopy research and technique     Volume:  37     ISSN:  1059-910X     ISO Abbreviation:  Microsc. Res. Tech.     Publication Date:  1997 Apr 
Date Detail:
Created Date:  1997-06-26     Completed Date:  1997-06-26     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9203012     Medline TA:  Microsc Res Tech     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  13-30     Citation Subset:  IM    
Affiliation:
Jagiellonian University, Department of Comparative Anatomy, Kraków, Poland. LWITAL@zuk.iz.uj.edu.pl
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MeSH Terms
Descriptor/Qualifier:
Amphibians / anatomy & histology*,  classification
Animals
Lung / cytology*,  innervation,  ultrastructure
Microscopy, Electron
Neurosecretory Systems / cytology*,  physiology,  ultrastructure
Phylogeny

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