• Neurocritical care · Jun 2022

    Review

    Microglia Modulate Cortical Spreading Depolarizations After Ischemic Stroke: A Narrative Review.

    • Kathryn N Kearns, Lei Liu, Sauson Soldozy, Khadijeh A Sharifi, Mark E Shaffrey, Min S Park, and Petr Tvrdik.
    • Department of Neurosurgery, University of Virginia Health System, Charlottesville, VA, USA.
    • Neurocrit Care. 2022 Jun 1; 37 (Suppl 1): 133-138.

    AbstractCortical spreading depolarizations (CSDs) are characterized by waves of diminished electroencephalography activity that propagate across the cortex with subsequent loss of ionic homeostasis. CSDs have been found in many pathological conditions, including migraine, traumatic brain injury, and ischemic stroke. Because of CSD-associated ionic and metabolic disturbances at the peri-infarct area after ischemic stroke, it is thought that CSDs exacerbate tissue infarction and worsen clinical outcomes. Microglia, the main innate immune cells in the brain, are among the first responders to brain tissue damage. Recent studies demonstrated that microglia play a critical role in CSD initiation and propagation. In this article, we discuss the significance of CSD in the setting of ischemic stroke and how microglia may modulate peri-infarct CSDs, also known as iso-electric depolarizations. Finally, we discuss the significance of microglial Ca2+ and how it might be used as a potential therapeutic target for patients with ischemic stroke.© 2022. The Author(s).

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