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Related Experiment Videos

Neuronal calcium stores.

A J Verkhratsky1, O H Petersen

  • 1Max Delbrück Center for Molecular Medicine, Berlin, Germany. av@nero.glia.mdc-berlin.de

Cell Calcium
|March 26, 1999
PubMed
Summary

Neuronal calcium stores, including the endoplasmic reticulum and mitochondria, regulate cytoplasmic calcium signals essential for neuronal activity. These stores buffer calcium and provide an internal source, impacting neuronal plasticity.

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Biochemistry

Background:

  • Neuronal activity relies on dynamic cytoplasmic calcium signals.
  • Intracellular organelles like endoplasmic reticulum and mitochondria act as crucial calcium stores.
  • These stores play a dual role in calcium homeostasis: buffering and release.

Purpose of the Study:

  • To elucidate the dynamic role of neuronal calcium stores in generating cytoplasmic calcium signals.
  • To understand how intracellular calcium store content influences calcium release and neuronal activity.
  • To explore the potential of various organelles as functional calcium storage compartments.

Main Methods:

  • Investigated the function of endoplasmic reticulum and mitochondria as neuronal calcium stores.
  • Analyzed the impact of calcium store content on intracellular calcium release.
  • Considered the potential roles of nuclear envelope and neurotransmitter vesicles in calcium storage.

Main Results:

  • Neuronal calcium stores dynamically regulate cytoplasmic calcium signals accompanying neuronal activity.
  • These stores buffer excess cytoplasmic calcium and serve as an intracellular source.
  • Calcium content within stores modulates the availability and magnitude of intracellular calcium release, linking neuronal activity to store function.

Conclusions:

  • Intracellular calcium stores are critical for neuronal calcium homeostasis and signal generation.
  • The functional state of these stores is coupled to neuronal activity.
  • Calcium released from internal stores is implicated in various neuronal functions, particularly neuronal plasticity.

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