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Related Experiment Videos

Cortical spreading depression transiently activates MAP kinases.

Ava K Chow1, C S Thompson, Matthew J Hogan

  • 1Neuroscience Research Institute, Faculty of Medicine, University of Ottawa, 451 Smyth, Ontario, Ottawa, Canada K1H 8M5.

Brain Research. Molecular Brain Research
|March 1, 2002
PubMed
Summary
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Cortical spreading depression (CSD) offers neuroprotection before brain ischemia. CSD activates the MAPK pathway, specifically ERK phosphorylation, which may explain its protective mechanism.

Area of Science:

  • Neuroscience
  • Cellular Biology
  • Ischemic Preconditioning

Background:

  • Cortical spreading depression (CSD) demonstrates neuroprotective potential against cerebral ischemia.
  • The underlying mechanisms of CSD-induced neuroprotection are not fully understood.
  • Mitogen-activated protein (MAP) kinases are implicated in neuroprotection during ischemic preconditioning.

Purpose of the Study:

  • To investigate the role of MAP kinase (MAPK) pathways in mediating the neuroprotective effects of CSD.
  • To determine if CSD activates MAPK signaling, specifically the ERK pathway.

Main Methods:

  • Induction of cortical spreading depression (CSD) in a rodent model.
  • Analysis of extracellular signal-regulated kinase (ERK) and MEK phosphorylation via Western blotting and immunohistochemistry.

Related Experiment Videos

  • Assessment of the temporal dynamics of MAPK activation post-CSD.

    • Main Results:

    • CSD significantly increased ERK phosphorylation in a MEK-dependent manner.
    • This ERK phosphorylation was transient, returning to baseline levels within 45 minutes.
    • Immunohistochemistry showed ubiquitous ERK phosphorylation in cortical cells, while MEK phosphorylation was localized to the nucleus.

    Conclusions:

    • CSD activates the MAPK pathway, involving MEK and ERK phosphorylation.
    • The transient nature and cellular localization of MAPK activation suggest a role in CSD-mediated preconditioning.
    • These findings provide insight into the molecular mechanisms underlying CSD's neuroprotective effects.