Excitotoxicity
Excitotoxicity - Related Videos
07:00
Excitotoxic Stimulation of Brain Microslices as an In vitro Model of Stroke
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Cited by 3 •
2014
We have developed a brain slice model which can be used to examine molecular mechanisms involved in excitotoxicity-mediated brain injury. This technique generates viable mature brain tissue and reduces animal numbers required for experimentation, whilst keeping the neuronal circuitry, cellular interactions, and postsynaptic compartments partly intact.
12:45
Stereotaxic Surgery for Excitotoxic Lesion of Specific Brain Areas in the Adult Rat
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Cited by 22 •
2012
Targeted ablation of specific brain region(s) by infusion of an excitotoxin using stereotaxic coordinates is described. This technique could also be adapted for infusion of other chemicals into the rat brain.
07:11
Examination of Anatomical Features of Retinal Ganglion Cells Under N-methyl-D-aspartic Acid (NMDA)-induced Excitotoxicity
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2025
Here, we describe the use of a genetically directed alkaline phosphatase (AP) labeling method to investigate the anatomical features and phenotypes of mouse retinas under NMDA-induced excitotoxicity. In conjunction with several retinal ganglion cell (RGC) subtype-specific reporter lines, we uncover novel phenotypes in dying RGCs throughout the degenerative process.
01:59
Modeling Neuronal Injury in Mouse Primary Cerebellar Granule Neurons
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2025
This video demonstrates the generation of a neuronal injury model in mouse primary cerebellar granule neurons. It outlines the steps involved in inducing neuronal injury using NMDA, an excitatory neurotransmitter receptor agonist, and glycine, a co-agonist. NMDA and glycine bind to specific neuronal receptors, causing their overstimulation and resulting in a massive intracellular calcium influx, which leads to neuronal cell damage and death.
02:29
Assessing the Neuroprotective Effects of Acidic Postconditioning in a Mouse Model of Cerebral Ischemia
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2025
Source: Zheng, Y., et al. Experimental Models to Study the Neuroprotection of Acidic Postconditioning Against Cerebral Ischemia. J. Vis. Exp. (2017)This video demonstrates the application of acidic postconditioning (APC) to evaluate its neuroprotective effects against ischemic injury in a mouse model of middle cerebral artery occlusion (MCAO). It outlines the steps involved in reperfusion in the MCAO model and the application of APC during reperfusion to mitigate excitotoxicity, oxidative...
FAQs
Calcium influx is a central link between receptor overactivation and neuronal injury. Persistent stimulation allows calcium to enter in excess, disrupting cellular signaling rather than producing a transient neural response. This disturbance helps explain how abnormal excitatory activity can progress from altered signaling to oxidative stress, mitochondrial dysfunction, and membrane damage. Targeting this sequence is therefore important when investigating ways to preserve neuronal function.
Both NMDA and AMPA receptors participate in the damaging response when glutamate stimulation remains excessive or prolonged. Their persistent activation promotes ion influx and sustains abnormal cellular signaling, with calcium overload being especially consequential. Considering both receptor pathways helps researchers connect excessive neurotransmitter activity with downstream oxidative stress, mitochondrial dysfunction, and membrane injury instead of treating neuronal damage as an isolated receptor event.
Prolonged excitatory stimulation can trigger a linked series of intracellular disturbances. Excessive ion influx disrupts normal signaling, while the resulting stress is associated with oxidative damage and impaired mitochondrial function. Membrane damage can then further compromise neuronal integrity. This sequence provides a biological framework for studying how abnormal neural activity produces tissue injury and why limiting receptor overactivation may be protective.
The harmful outcome depends on stimulation becoming excessive and persistent rather than remaining within a transient signaling range. Sustained activation of glutamate-responsive receptors promotes prolonged ion influx and gives cellular stress mechanisms time to accumulate. As signaling disruption, oxidative stress, mitochondrial dysfunction, and membrane damage develop together, greater or longer-lasting receptor activation can be studied as a route to worsening neuronal injury.
Excitotoxicity provides a mechanism for connecting abnormal neural activity with tissue damage after stroke and traumatic brain injury. In these settings, excessive glutamate receptor stimulation can lead to prolonged ion influx and the cellular disturbances associated with neuronal injury. Studying this pathway helps biology researchers interpret how acute neurological insults damage neurons and evaluate strategies intended to preserve neuronal function.
The mechanism is relevant beyond acute injury because it is also implicated in epilepsy and neurodegenerative diseases. In these conditions, researchers can examine how abnormal excitatory activity and receptor overactivation relate to neuronal damage. This perspective supports investigations into the relationship between disturbed neural signaling and progressive loss of neuronal integrity, while helping identify cellular processes that may be useful for disease-focused research.
Research on excitotoxicity can clarify how abnormal neural activity produces neuronal damage and can guide approaches that limit excessive receptor activation. The intended outcomes include preserving neuronal function and improving results in neurological disorders associated with this mechanism. By linking receptor activity with calcium-related signaling disruption, oxidative stress, mitochondrial dysfunction, and membrane damage, the process offers a framework for evaluating protective strategies.