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Axons are long, cytoplasmic processes of nerve cells capable of propagating electrical impulses known as action potentials. The cytoplasm or axoplasm of an axon contains neurofibrils, neurotubules, small vesicles, lysosomes, mitochondria, and various enzymes, all encased within the axolemma, the plasma membrane of the axon.
The axon attaches to the cell body at a cone-shaped elevation called the axon hillock. The initial part of the axon, closest to the hillock, is known as the initial segment....
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Intraneuronal Nanotracers in Axonal Transport.

Zhigao Yi1,2, Angelo H All3, Yuxia Liu4,5

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Axonal transport is vital for neuron health, and its disruptions link to neurodegenerative diseases. New tracking methods improve understanding and offer diagnostic and therapeutic potential.

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Area of Science:

  • Neuroscience
  • Cell Biology

Background:

  • Axonal transport is essential for neuronal function, growth, signaling, and repair.
  • Defects in axonal transport are linked to neurodegenerative and neurodevelopmental disorders.

Purpose of the Study:

  • To review scientific and technical advancements in visualizing axonal transport.
  • To examine the molecular machinery and components of axonal transport.
  • To highlight novel nanomaterial-based tracing methods and future research directions.

Main Methods:

  • Review of scientific literature on axonal transport visualization techniques.
  • Analysis of molecular components including microtubules, motor proteins, and cargoes.
  • Exploration of in vivo and in vitro tracking methods, including nanomaterial-based approaches.

Main Results:

  • Recent advances in tracking methods have enhanced understanding of transport defects and their mechanisms.
  • Nanomaterial-based tracing methods represent a significant development in visualization.
  • The review provides a comprehensive overview of the current state and future prospects of axonal transport research.

Conclusions:

  • Improved visualization techniques are crucial for understanding neuronal function and disease.
  • Further research into axonal transport mechanisms and novel tracing methods is needed for therapeutic advancements.
  • This review consolidates current knowledge and identifies key areas for future investigation in axonal transport.