ArticleFrontiers in molecular neuroscience2024
Actin polymerization and longitudinal actin fibers in axon initial segment plasticity.
Article in Frontiers in molecular neuroscience, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Distinct Arp2/3 isocomplexes drive axonal actin ring assembly and integrity.Science advances · 2026Article
- Axon Initial Segment: Structure, Biological Functions, Diseases, and Therapeutic Targets.MedComm · 2026Review
- Nonmuscle myosin II regulates presynaptic actin and neuronal mechanobiology in Drosophila.The Journal of cell biology · 2025Article
- The membrane skeleton is constitutively remodeled in neurons by calcium signaling.Science (New York, N.Y.) · 2025Article
- Ankyrin-G and Its Binding Partners in Neurons: Orchestrating the Molecular Structure of the Axon Initial Segment.Biomolecules · 2025Review
- Axon initial segment structure and function in health and disease.Physiological reviews · 2025Review
- Modulation of axon excitable domains by astrocytes and microglia.Frontiers in cellular neuroscience · 2025Review
- Super-resolution imaging of the neuronal cytoskeleton.Npj imaging · 2024Review
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2 authors.
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Abstract
The location of the axon initial segment (AIS) at the junction between the soma and axon of neurons makes it instrumental in maintaining neural polarity and as the site for action potential generation. The AIS is also capable of large-scale relocation in an activity-dependent manner. This represents a form of homeostatic plasticity in which neurons regulate their own excitability by changing the size and/or position of the AIS. While AIS plasticity is important for proper functionality of AIS-containing neurons, the cellular and molecular mechanisms of AIS plasticity are poorly understood. Here, we analyzed changes in the AIS actin cytoskeleton during AIS plasticity using 3D structured illumination microscopy (3D-SIM). We showed that the number of longitudinal actin fibers increased transiently 3 h after plasticity induction. We further showed that actin polymerization, especially formin mediated actin polymerization, is required for AIS plasticity and formation of longitudinal actin fibers. From the formin family of proteins, Daam1 localized to the ends of longitudinal actin fibers. These results indicate that active re-organization of the actin cytoskeleton is required for proper AIS plasticity.
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