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Related Experiment Videos

Cytoskeletal elements in neurons

D Bray, D Gilbert

    Annual Review of Neuroscience
    |January 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Neurotubules and neurofilaments, homologous to cytoplasmic microtubules and microfilaments, are essential for cell structure. Their subunits are transported to the axon

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    Area of Science:

    • Cell Biology
    • Neuroscience
    • Cytoskeleton Dynamics

    Background:

    • Neurotubules and neurofilaments are key cytoskeletal components in neurons.
    • These structures are homologous to cytoplasmic microtubules and microfilaments found in various plant and animal cells.
    • Understanding their assembly is crucial for neuronal development and function.

    Purpose of the Study:

    • To investigate the structural homology between neuronal and cytoplasmic cytoskeletal elements.
    • To elucidate the transport mechanism of neurotubule and neurofilament subunits.
    • To determine the site of subunit addition during axon outgrowth.

    Main Methods:

    • Electron microscopy was used to visualize neurotubules and neurofilaments in plant and animal cells.
    • Subunit transport dynamics were inferred through observation of their localization.

    Related Experiment Videos

  • Axon growth cones were examined to identify sites of cytoskeletal assembly.

    • Main Results:

    • Neurotubules and neurofilaments exhibit homology with cytoplasmic microtubules and microfilaments.
    • Subunits of neurotubules and neurofilaments are actively transported towards the axon's growth cone.
    • Subunit addition occurs at the distal ends of elongating neurotubules within the growth cone.

    Conclusions:

    • The findings highlight the conserved nature of cytoskeletal components across different cell types.
    • Axon growth relies on the directed transport and distal addition of neurotubule and neurofilament subunits.
    • This process is fundamental for establishing neuronal architecture during development.