Dendrite architecture determines mitochondrial distribution patterns in vivo.
Cell Rep
; 43(5): 114190, 2024 May 28.
Article
in En
| MEDLINE
| ID: mdl-38717903
ABSTRACT
Neuronal morphology influences synaptic connectivity and neuronal signal processing. However, it remains unclear how neuronal shape affects steady-state distributions of organelles like mitochondria. In this work, we investigated the link between mitochondrial transport and dendrite branching patterns by combining mathematical modeling with in vivo measurements of dendrite architecture, mitochondrial motility, and mitochondrial localization patterns in Drosophila HS (horizontal system) neurons. In our model, different forms of morphological and transport scaling rules-which set the relative thicknesses of parent and daughter branches at each junction in the dendritic arbor and link mitochondrial motility to branch thickness-predict dramatically different global mitochondrial localization patterns. We show that HS dendrites obey the specific subset of scaling rules that, in our model, lead to realistic mitochondrial distributions. Moreover, we demonstrate that neuronal activity does not affect mitochondrial transport or localization, indicating that steady-state mitochondrial distributions are hard-wired by the architecture of the neuron.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Dendrites
/
Mitochondria
Limits:
Animals
Language:
En
Journal:
Cell Rep
Year:
2024
Document type:
Article
Affiliation country:
United States