Document Detail


Autoradiographic evidence for receptor cell renewal in the olfactory epithelium of a snail.
MedLine Citation:
PMID:  3779377     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The tentacles of the terrestrial snail Achatina fulica contain an epithelium at their tips which is specialized for olfaction. The histology of the snail's olfactory organ bears a striking resemblance to that of the olfactory mucosa in the nose of vertebrates, where the receptor cell population is known to undergo a continuous process of renewal. In the present experiments, [3H]thymidine was delivered as a single pulse that was determined to have a maximum duration of about 1 h. Thirty minutes after an injection of [3H]thymidine, presumptive precursor cells were found labeled within, or at the edges of, receptor cell lobules. At later survival times, label was seen over cells that were identified as receptors. The mean position of the labeled cells within the layer of receptor cells became progressively more superficial with increasing survival times, indicating an upward migration of newly differentiated cells. The labeling index in the snail is ca. 0.7%, compared to 0.9% in the mouse. The turnover time is about 45 days, compared to 30-45 days in the mouse.
Authors:
R Chase; J Rieling
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Brain research     Volume:  384     ISSN:  0006-8993     ISO Abbreviation:  Brain Res.     Publication Date:  1986 Oct 
Date Detail:
Created Date:  1987-01-05     Completed Date:  1987-01-05     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0045503     Medline TA:  Brain Res     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  232-9     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Autoradiography
Cell Movement
Chemoreceptor Cells / physiology*
Mitosis
Sense Organs / cytology*
Snails / physiology*
Thymidine / metabolism
Chemical
Reg. No./Substance:
50-89-5/Thymidine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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