Verhage, Matthijs;
Maia, Ascanio S.;
Plomp, Jaap J.;
Brussaard, Arjen B.;
Heeroma, Joost H.;
Vermeer, Hendrika;
Toonen, Ruud F.;
Hammer, Robert E.;
van den, Timo K.;
Berg;
Missler, Markus;
Geuze, Hans J.;
Südhof, Thomas C.
Synaptic Assembly of the Brain in the Absence of Neurotransmitter Secretion
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Medientyp:
E-Artikel
Titel:
Synaptic Assembly of the Brain in the Absence of Neurotransmitter Secretion
Beteiligte:
Verhage, Matthijs;
Maia, Ascanio S.;
Plomp, Jaap J.;
Brussaard, Arjen B.;
Heeroma, Joost H.;
Vermeer, Hendrika;
Toonen, Ruud F.;
Hammer, Robert E.;
van den, Timo K.;
Berg;
Missler, Markus;
Geuze, Hans J.;
Südhof, Thomas C.
Erschienen:
American Association for the Advancement of Science (AAAS), 2000
Erschienen in:
Science, 287 (2000) 5454, Seite 864-869
Sprache:
Englisch
DOI:
10.1126/science.287.5454.864
ISSN:
0036-8075;
1095-9203
Entstehung:
Anmerkungen:
Beschreibung:
Brain function requires precisely orchestrated connectivity between neurons. Establishment of these connections is believed to require signals secreted from outgrowing axons, followed by synapse formation between selected neurons. Deletion of a single protein, Munc18-1, in mice leads to a complete loss of neurotransmitter secretion from synaptic vesicles throughout development. However, this does not prevent normal brain assembly, including formation of layered structures, fiber pathways, and morphologically defined synapses. After assembly is completed, neurons undergo apoptosis, leading to widespread neurodegeneration. Thus, synaptic connectivity does not depend on neurotransmitter secretion, but its maintenance does. Neurotransmitter secretion probably functions to validate already established synaptic connections.