Journal Article

DZNE-2022-00619

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The branching code: A model of actin-driven dendrite arborization.

Stürner, T. (First author)DZNE* ; Ferreira Castro, A.DZNE* ; Philipps, M.DZNE* ; Cuntz, H. ; Tavosanis, G. (Last author)DZNE*

2022
Elsevier [New York, NY]

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Please use a persistent id in citations: doi:10.1016/j.celrep.2022.110746

Abstract: The cytoskeleton is crucial for defining neuronal-type-specific dendrite morphologies. To explore how the complex interplay of actin-modulatory proteins (AMPs) can define neuronal types in vivo, we focused on the class III dendritic arborization (c3da) neuron of Drosophila larvae. Using computational modeling, we reveal that the main branches (MBs) of c3da neurons follow general models based on optimal wiring principles, while the actin-enriched short terminal branches (STBs) require an additional growth program. To clarify the cellular mechanisms that define this second step, we thus concentrated on STBs for an in-depth quantitative description of dendrite morphology and dynamics. Applying these methods systematically to mutants of six known and novel AMPs, we revealed the complementary roles of these individual AMPs in defining STB properties. Our data suggest that diverse dendrite arbors result from a combination of optimal-wiring-related growth and individualized growth programs that are neuron-type specific.

Keyword(s): Actins: metabolism (MeSH) ; Animals (MeSH) ; Dendrites: metabolism (MeSH) ; Drosophila: metabolism (MeSH) ; Drosophila Proteins: metabolism (MeSH) ; Neuronal Plasticity (MeSH) ; CP: Molecular biology ; CP: Neuroscience ; Drosophila ; actin ; actin-modulatory proteins ; computational modeling ; dendrite ; dendritic arborization neurons ; morphometrics ; neuron ; optimal wiring ; time-lapse imaging ; Actins ; Drosophila Proteins

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Contributing Institute(s):

1. Dynamics of neuronal circuits (AG Tavosanis)
2. Laboratory Automation Technologies (LAT) (LAT)

Research Program(s):

1. 351 - Brain Function (POF4-351) (POF4-351)

Appears in the scientific report 2022

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