Document Detail


The release of Leu5-enkephalin-like immunoreactivity from chicken retina is reduced by light in vitro.
MedLine Citation:
PMID:  2743139     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A superfusion system was established to examine the efflux of endogenous Leu5-enkephalin-like immunoreactivity (LE-LI) from isolated chicken retinas. Superfusion with buffer containing high concentration of K+ (60 mM KCl) increased the efflux of LE-LI by 96%. This effect was not observed when Co2+ (4 mM CoCl2) was present. Exposing the retinas to light decreased the efflux of LE-LI by 59% compared to that observed during superfusion in the dark. No effect of ambient light could be detected in the presence of Co2+. Upon reverse-phase high-performance liquid chromatography the material released by the retina comigrated with synthetic Leu5-enkephalin. These results demonstrate that the release of LE-LI from retinal neurons is increased during the dark, and it is concluded that the lighting conditions exert their effects by modifying the state of polarization of the LE-LI amacrine cells and hence the release of LE-LI from these neurons.
Authors:
M K Boelen; M Dowton; I W Chubb
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Publication Detail:
Type:  In Vitro; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Brain research     Volume:  488     ISSN:  0006-8993     ISO Abbreviation:  Brain Res.     Publication Date:  1989 May 
Date Detail:
Created Date:  1989-08-14     Completed Date:  1989-08-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0045503     Medline TA:  Brain Res     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  43-8     Citation Subset:  IM    
Affiliation:
Department of Biology, University of Wollongong, N.S.W., Australia.
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MeSH Terms
Descriptor/Qualifier:
Animals
Chickens
Cobalt / pharmacology
Enkephalin, Leucine / metabolism*
Photic Stimulation
Potassium / pharmacology
Radioimmunoassay
Retina / metabolism*,  physiology
Chemical
Reg. No./Substance:
58822-25-6/Enkephalin, Leucine; 7440-09-7/Potassium; 7440-48-4/Cobalt

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


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