Presynaptic initiation by action potentials of retrograde signals in developing neurons.

Détails

Ressource 1Télécharger: 4253.full.pdf (920.35 [Ko])
Etat: Serval
Version: Final published version
ID Serval
serval:BIB_556243A63C8C
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Presynaptic initiation by action potentials of retrograde signals in developing neurons.
Périodique
Journal of Neuroscience
Auteur(s)
Primi M.P., Clarke P.G.H.
ISSN
0270-6474[print], 0270-6474[linking]
Statut éditorial
Publié
Date de publication
1997
Volume
17
Numéro
11
Pages
4253-4261
Langue
anglais
Résumé
Until recently, the only means by which electrical activity was believed to initiate retrograde signals was via postsynaptic events: modulated synthesis or release of trophic factors. We have evidence in chick embryos for a presynaptic initiation of retrograde signals from the retina to the isthmo-optic nucleus, which is known to undergo 55% neuron death between embryonic days 12 and 17 and to become laminated during this period. Intraocular injections of saxitoxin just before embryonic day 14 reduce neuron death and prevent lamination in the isthmo-optic nucleus within as few as 6 hr. We show that these rapid effects are attributable to the direct action of saxitoxin on the isthmo-optic terminals. Alternative possibilities, such as an indirect effect via the target cells, are ruled out by control experiments. Normally, action potentials may lead to a chain of second messenger events in the axon terminal that is signaled retrogradely via the transport of a long-lived second messenger.
Mots-clé
Action Potentials/drug effects, Action Potentials/physiology, Animals, Axonal Transport/drug effects, Axonal Transport/physiology, Cell Death/drug effects, Cell Death/physiology, Chick Embryo, Colchicine/pharmacology, Excitatory Amino Acid Agonists/pharmacology, Gout Suppressants/pharmacology, Kainic Acid/pharmacology, Microinjections, Presynaptic Terminals/physiology, Protein Synthesis Inhibitors/pharmacology, Retinal Ganglion Cells/cytology, Retinal Ganglion Cells/drug effects, Saxitoxin/pharmacology, Signal Transduction/physiology, Superior Colliculi/cytology, Superior Colliculi/embryology, Time Factors, Visual Pathways/physiology
Pubmed
Web of science
Création de la notice
20/01/2008 18:49
Dernière modification de la notice
03/03/2018 17:19
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