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[ISOMETRIC RETRACTION AND THE INVISIBLE PROCESSES OF NERVE CELLS].

Morfologiia (Saint Petersburg, Russia)·2016
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Lubinska Phenomenon: Simultaneous Bidirectional Axoplasmic Flow in Nerve Fibers.

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Binucleated and Multinucleated Neurons are Formed by Fusion.

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Summary

This study reveals that neurons can fuse to form multinucleated cells, challenging the amitosis theory. These findings are crucial for understanding neuronal development and function.

Keywords:
binucleated neuronfusion of nerve processes with the somamultinucleated neuronneuronal fusionneuronal symplast

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Microscopy

Background:

  • Macroscopic cellular phenomena like neuronal multinucleosis are understudied despite their impact on research.
  • Current molecular biology techniques overlook fundamental aspects of neuronal interaction.

Purpose of the Study:

  • To investigate the formation of multinucleated neurons and refute the amitosis mechanism.
  • To explore neuronal fusion and cytoplasmic exchange using advanced imaging.

Main Methods:

  • Live cell videorecording of neuronal adhesive contacts and fusion.
  • Electron microscopy of isolated and centrifuged neuronal cells.
  • Analysis of neurite dynamics and cell body anastomosis.

Main Results:

  • Observed complete fusion of neuronal cell bodies, including neurite introduction into the cytoplasm.
  • Identified live trinuclear neurons without evidence of amitotic division.
  • Electron microscopy confirmed fusion of multiple neurons into a single cell post-centrifugation.

Conclusions:

  • Neuronal multinucleosis can occur through cell fusion, not solely amitosis.
  • The study provides evidence against amitosis as the primary mechanism for binucleation.
  • Findings necessitate a re-evaluation of neuronal development models considering cell fusion.