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Related Experiment Videos

Transient decrease in calbindin immunoreactivity of the rat fascia dentata granule cells after repeated

N Tønder1, J Kragh, T Bolwig

  • 1PharmaBiotec Research Center, Aarhus, Denmark.

Hippocampus
|February 1, 1994
PubMed
Summary
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Repeated electroconvulsive shocks transiently reduce hippocampal calbindin in rats. This protein, crucial for neuronal function, returned to normal levels within 30 days post-treatment.

Area of Science:

  • Neuroscience
  • Cell Biology

Background:

  • Calbindin is a calcium-binding protein vital for neuronal function and survival.
  • Electroconvulsive shock (ECS) therapy is used to treat severe depression, but its cellular effects are not fully understood.

Purpose of the Study:

  • To investigate the impact of repeated electroconvulsive shocks (ECS) on hippocampal calbindin immunoreactivity in adult rats.
  • To determine the dose-dependent and time-course effects of ECS on calbindin levels.

Main Methods:

  • Adult rats received 10, 20, or 36 ECS treatments.
  • Calbindin immunoreactivity in the hippocampus was assessed using immunohistochemistry at 1, 2, and 30 days post-ECS.

Main Results:

  • ECS caused a dose-dependent reduction in calbindin immunoreactivity in dentate granule cells and mossy fibers.

Related Experiment Videos

  • These changes were most pronounced 1-2 days after ECS, with significant recovery observed by 30 days.
  • 36 ECS treatments led to a near-complete loss of calbindin in granule cell bodies and dendrites.

    • Conclusions:

    • Repeated ECS induces transient, significant alterations in hippocampal calbindin.
    • The observed changes in calbindin immunoreactivity are reversible, suggesting neuronal plasticity in response to ECS.
    • These findings contribute to understanding the neurobiological mechanisms underlying ECS therapy.