Document Detail

Axonal transport of cadmium in the olfactory nerve of the pike.
MedLine Citation:
PMID:  1720248     Owner:  NLM     Status:  MEDLINE    
109Cd2+ was applied in the olfactory chambers of pikes (Esox lucius) and the dynamics of the axoplasmic flow of the metal was determined in the olfactory nerves by gamma spectrometry and autoradiography. The results showed that the 109Cd2+ is transported at a constant rate along the olfactory nerves. The profile of the 109Cd2+ in the nerves showed a wave front of transported metal followed by a saddle region. When the nasal chambers were washed 2 hr after application of the 109Cd2+ well-defined transport peaks for the metal were seen in the olfactory axons. The maximal velocity for the transport of 109Cd2+, which corresponds to the movement of the wave front, was 2.38 +/- 0.10 mm/hr (mean +/- S.E.) at the experimental temperature (10 degrees C). The average velocity for the transport of the 109Cd2+, which corresponds to the peak apex movement of the wave, was 2.18 +/- 0.05 mm/hr (mean +/- S.E.) at 10 degrees C. The transported 109Cd2+ was strongly accumulated in the anterior parts of the olfactory bulbs, whereas in other brain areas the levels of the metal remained low. Autoradiography of a pike exposed to 109Cd2+ via the water showed a strong labelling in the receptor-cell-containing olfactory rosettes, whereas other structures in the olfactory chambers were only weakly labelled. The accumulation and axonal transport in the olfactory neurons may be noxious and constitute an important component in the toxicology of cadmium in fish, and this may apply also to some other heavy metals.
J Gottofrey; H Tjälve
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Pharmacology & toxicology     Volume:  69     ISSN:  0901-9928     ISO Abbreviation:  Pharmacol. Toxicol.     Publication Date:  1991 Oct 
Date Detail:
Created Date:  1991-12-31     Completed Date:  1991-12-31     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8702180     Medline TA:  Pharmacol Toxicol     Country:  DENMARK    
Other Details:
Languages:  eng     Pagination:  242-52     Citation Subset:  IM    
Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Swedish University of Agricultural Sciences, Uppsala.
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MeSH Terms
Axonal Transport / physiology*
Cadmium / pharmacokinetics*
Cadmium Radioisotopes / diagnostic use
Gills / metabolism
Olfactory Bulb / metabolism
Olfactory Nerve / metabolism*
Salmonidae / metabolism*
Time Factors
Reg. No./Substance:
0/Cadmium Radioisotopes; 7440-43-9/Cadmium

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