Ontogeny of two different benzodiazepine binding sites in the chick optic lobe

The developmental time-course of type I and type II benzodiazepine receptors in the chick optic lobe was determined using a triazolopyridazine, CL 218872. At embryonic day 13 most of the binding sites corresponded to type II (98.23%), while type I represented only a minor proportion (1.77%). During...

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Veröffentlicht in:Neuroreport 1995-10, Vol.6 (15), p.2013-2016
Hauptverfasser: Gravielle, Maria Clara, de Plazas, Sara Fiszer
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description The developmental time-course of type I and type II benzodiazepine receptors in the chick optic lobe was determined using a triazolopyridazine, CL 218872. At embryonic day 13 most of the binding sites corresponded to type II (98.23%), while type I represented only a minor proportion (1.77%). During development there was an increase in type I binding sites which reached 62.88% in adulthood, while type II binding sites decreased to 37.12%. These results demonstrate a differential ontogeny of two benzodiazepine receptor subtypes. Changes in the benzodiazepine binding population may account for the variability in the GABA-benzodiazepine receptor interaction during chick optic lobe development.
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subjects Animals
Anti-Anxiety Agents - pharmacology
Binding Sites
Biological and medical sciences
Chickens
Development. Senescence. Regeneration. Transplantation
Flunitrazepam - metabolism
Fundamental and applied biological sciences. Psychology
Kinetics
Pyridazines - pharmacology
Receptors, GABA-A - metabolism
Tectum Mesencephali - growth & development
Tectum Mesencephali - metabolism
Vertebrates: nervous system and sense organs
title Ontogeny of two different benzodiazepine binding sites in the chick optic lobe
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