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Neuronal Ryanodine Receptors in Development and Aging.

Nawaf Abu-Omar1, Jogita Das1, Vivian Szeto1

  • 1Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, ON, M5S 1A8, Canada.

Molecular Neurobiology
|January 20, 2017
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Summary

Ryanodine receptors (RyRs) regulate calcium in brain cells during development and aging. Dysregulation of these channels impacts neuronal function and may contribute to neurodegenerative diseases like Alzheimer's.

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AgingCalcium releaseFK506-binding proteinNeurodevelopmentOxidative stressPresenilin

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Biochemistry

Background:

  • Ryanodine receptors (RyRs) are critical intracellular calcium channels located on the endoplasmic reticulum.
  • All three RyR isoforms (RyR1-3) are present in the brain, with RyR2 being predominant.
  • RyRs are found in various neuronal compartments, including soma, axons, dendrites, and presynaptic terminals, and are highly expressed in key brain regions like the cerebellum and hippocampus.

Purpose of the Study:

  • To review the mechanisms of development- and age-related regulation of RyRs.
  • To explore the role of RyRs in maintaining intracellular calcium homeostasis throughout the lifespan.
  • To discuss the implications of RyR dysregulation in neuronal function and neurodegenerative diseases.

Main Methods:

  • This is a review article, synthesizing existing research on RyR function and regulation.
  • The review discusses potential mechanisms of RyR regulation during development and aging.
  • It examines the link between RyR dysregulation, calcium imbalance, and neuronal pathology.

Main Results:

  • RyRs play a significant role in regulating intracellular calcium levels during development and aging.
  • Dysfunctional RyRs can lead to calcium imbalance, cellular vulnerability, impaired synaptic function, and neuronal death.
  • Age-related changes in RyR function are implicated in cellular senescence.

Conclusions:

  • RyR regulation is crucial for maintaining neuronal health across the lifespan.
  • Aberrant RyR activity contributes to age-related cellular changes and neurodegeneration.
  • Targeting RyRs presents a potential therapeutic strategy for slowing aging processes and treating neurodegenerative conditions such as Alzheimer's disease.