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Updated: Mar 9, 2026

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Direct Current-Induced Calcium Trafficking in Different Neuronal Preparations.

Andrzej Wieraszko1, Zaghloul Ahmed2

  • 1Department of Biology, The College of Staten Island/City University of New York, 2800 Victory Boulevard, Staten Island, NY 10314, USA.

Neural Plasticity
|January 12, 2017
PubMed
Summary

Direct current (DC) stimulation enhances calcium redistribution in nerve tissues and synaptosomes. This effect, influenced by stimulation strength and electrode type, persists after exposure and is modulated by specific environmental conditions.

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Area of Science:

  • Neuroscience
  • Biophysics

Background:

  • Calcium ions play a crucial role in neuronal function, including synaptic transmission and nerve signaling.
  • Understanding how external stimuli influence calcium dynamics is vital for neuroscience research.

Purpose of the Study:

  • To investigate the impact of direct current (DC) stimulation on calcium trafficking in various neural preparations.
  • To determine the parameters influencing DC-induced calcium redistribution and accumulation.

Main Methods:

  • Investigated radioactive calcium trafficking in sciatic nerve (in vivo and in vitro), spinal cord, and synaptosomes under DC stimulation.
  • Assessed the effects of varying DC stimulation strength, electrode configuration (anodal vs. cathodal), cobalt inhibition, osmotic shock, enzymatic treatment (neuroaminidase), and sodium-free environments.

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Main Results:

  • DC stimulation significantly enhanced calcium redistribution across all tested neural preparations.
  • The observed effects were dependent on stimulation intensity and duration, persisting post-stimulation.
  • Cathodal stimulation demonstrated a more potent effect than anodal stimulation.
  • DC-induced calcium sequestration in synaptosomes was inhibited by cobalt and synaptosome rupture.
  • Calcium accumulation was amplified in sodium-free conditions or after enzymatic removal of sialic acid.

Conclusions:

  • Direct current stimulation is a potent modulator of calcium dynamics in neural tissues.
  • The findings highlight the complex interplay between electrical stimulation, calcium transport, and neuronal membrane properties.
  • This research provides insights into potential neuromodulation strategies targeting calcium signaling pathways.