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  Fascin controls neuronal class-specific dendrite arbor morphology

Nagel, J., Delandre, C., Zhang, Y., Foerstner, F., Moore, A. W., & Tavosanis, G. (2012). Fascin controls neuronal class-specific dendrite arbor morphology. DEVELOPMENT, 139(16), 2999-3009. doi:10.1242/dev.077800.

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Nagel, Julia1, Autor           
Delandre, Caroline2, Autor
Zhang, Yun1, Autor           
Foerstner, Friedrich2, Autor
Moore, Adrian W.2, Autor
Tavosanis, Gaia1, Autor           
Affiliations:
1Research Group: Dendrite Differentiation / Tavosanis, MPI of Neurobiology, Max Planck Society, ou_1113561              
2external, ou_persistent22              

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Schlagwörter: PROTEIN-KINASE-C; DROSOPHILA SENSORY NEURONS; ACTIN-BUNDLING PROTEIN; CELL-MIGRATION; SINGED LOCUS; BINDING; GENE; THROMBOSPONDIN-1; PHOSPHORYLATION; MORPHOGENESISFascin; Singed; Dendrite; Drosophila;
 Zusammenfassung: The branched morphology of dendrites represents a functional hallmark of distinct neuronal types. Nonetheless, how diverse neuronal class-specific dendrite branches are generated is not understood. We investigated specific classes of sensory neurons of Drosophila larvae to address the fundamental mechanisms underlying the formation of distinct branch types. We addressed the function of fascin, a conserved actin-bundling protein involved in filopodium formation, in class III and class IV sensory neurons. We found that the terminal branchlets of different classes of neurons have distinctive dynamics and are formed on the basis of molecularly separable mechanisms; in particular, class III neurons require fascin for terminal branching whereas class IV neurons do not. In class III neurons, fascin controls the formation and dynamics of terminal branchlets. Previous studies have shown that transcription factor combinations define dendrite patterns; we find that fascin represents a downstream component of such programs, as it is a major effector of the transcription factor Cut in defining class III-specific dendrite morphology. Furthermore, fascin defines the morphological distinction between class III and class IV neurons. In fact, loss of fascin function leads to a partial conversion of class III neurons to class IV characteristics, while the reverse effect is obtained by fascin overexpression in class IV neurons. We propose that dedicated molecular mechanisms underlie the formation and dynamics of distinct dendrite branch types to elicit the accurate establishment of neuronal circuits.

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Sprache(n): eng - English
 Datum: 2012-08-15
 Publikationsstatus: Erschienen
 Seiten: 11
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: ISI: 000306706300017
DOI: 10.1242/dev.077800
 Art des Abschluß: -

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Titel: DEVELOPMENT
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: BIDDER BUILDING CAMBRIDGE COMMERCIAL PARK COWLEY RD, CAMBRIDGE CB4 4DL, CAMBS, ENGLAND : COMPANY OF BIOLOGISTS LTD
Seiten: - Band / Heft: 139 (16) Artikelnummer: - Start- / Endseite: 2999 - 3009 Identifikator: ISSN: 0950-1991