Excitotoxicity and the Glutamate Storm With ATP depleted, glutamate, the primary excitatory neurotransmitter, is not efficiently cleared from the synaptic cleft. Microglia and astrocytes become activated, shifting from a protective to a detrimental role as they release cytotoxic compounds.
Astrocytes in Ischemic Cascade: How Glutamate Storm and Inflammation Drive Brain Damage
This physical obstruction drastically reduces blood flow to the downstream brain region, depriving neurons of the necessary substrates for aerobic respiration. Without oxygen, the electron transport chain within the mitochondria halts, causing ATP synthesis to plummet and forcing the cell to rely on inefficient anaerobic glycolysis.
This complex sequence of molecular and cellular events unfolds over minutes to hours, ultimately determining whether tissue survives or undergoes permanent damage. Inflammation, Acidosis, and Oxidative Stress The influx of calcium triggers the production of reactive oxygen species and activates inflammatory pathways.
Astrocytes in the Ischemic Cascade: From Support to Injury
Understanding the ischemic cascade is essential for grasping how the brain responds to a sudden loss of blood flow. Understanding the precise timing and mechanisms of each phase allows clinicians to develop interventions that maximize the preservation of penumbral tissue and improve patient outcomes.
More About Ischemic cascade
Looking at Ischemic cascade from another angle can help expand the discussion and give readers a second clear paragraph under the same section.
More perspective on Ischemic cascade can make the topic easier to follow by connecting earlier points with a few simple takeaways.
