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Neuronal sub-compartmentalization: a strategy to optimize neuronal function.

Alessandra Donato1, Konstantinos Kagias2, Yun Zhang2

  • 1Clem Jones Centre for Dementia Research, Queensland Brain Institute, The University of Queensland, Brisbane, Queensland, Australia.

Biological Reviews of the Cambridge Philosophical Society
|January 5, 2019
PubMed
Summary
This summary is machine-generated.

Neurons exhibit complex sub-compartmentalization within axons and dendrites. These specialized regions, like the axonal initial segment, are crucial for neuronal function and behavior, prompting further research into their mechanisms and roles.

Keywords:
axonal and dendritic sub-compartmentscompartmentalizationneuronal activityneuronal developmentpatterningpolarizationunipolar neurons

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Area of Science:

  • Neuroscience
  • Cell Biology

Background:

  • Neurons possess distinct structural and functional domains: soma, axon, and dendrites.
  • Axons and dendrites contain specialized compartments like presynaptic boutons and postsynaptic spines.
  • Recent discoveries reveal intricate sub-compartmentalization within neuronal axons and dendrites.

Purpose of the Study:

  • To review and discuss the emerging concept of sub-compartmentalization in neurons.
  • To highlight examples of sub-compartmentalization in both vertebrate and invertebrate models.
  • To identify key questions regarding the establishment, maintenance, and function of neuronal sub-compartments.

Main Methods:

  • Literature review and synthesis of recent findings on neuronal sub-compartmentalization.
  • Examination of examples from mammalian neurons, Drosophila melanogaster, and Caenorhabditis elegans.
  • Discussion of experimental evidence for functional roles of sub-compartments.

Main Results:

  • The axonal initial segment acts as a critical sub-compartment for action potential initiation and molecular filtering.
  • Axonal guidance receptors show precise, compartmentalized localization in Drosophila, suggesting intrinsic mechanisms.
  • Localized calcium dynamics in specific axon sections of C. elegans interneurons regulate navigation behavior.

Conclusions:

  • Neuronal structures are more complex than previously understood, with significant sub-compartmentalization.
  • Sub-compartmentalization plays vital roles in neuronal polarization, signaling, and behavior.
  • Further research is needed to elucidate the molecular machinery, cellular events, and functional significance of these neuronal sub-compartments.