Methamphetamine-Induced Neurotoxicity Mechanisms

Methamphetamine exerts neurotoxic effects through a constellation of molecular and cellular pathways that converge on dopaminergic and serotonergic systems. Following drug exposure, excessive release and inhibited reuptake of dopamine lead to oxidative stress, characterised by an overproduction of reactive oxygen species and mitochondrial dysfunction. Concurrently, excitotoxicity arises from dysregulated glutamate signalling, driving intracellular calcium overload and further mitochondrial injury. Endoplasmic reticulum stress provokes unfolded protein responses, culminating in apoptosis and autophagy. Methamphetamine breaches blood–brain barrier integrity, facilitating peripheral immune factors into the central nervous system. Glial cells, notably astrocytes and microglia, respond with inflammatory programmes, including inflammasome activation and cytokine release, which amplify neuronal damage. Over time, these mechanisms manifest as synaptic degeneration, gliosis, cognitive impairment and heightened vulnerability to psychiatric disorders. Understanding this interplay offers avenues for targeted intervention to mitigate long-term neurological sequelae of methamphetamine misuse.

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Methamphetamine-Induced Neurotoxicity Mechanisms publication trend

The graph below shows the total number of articles in methamphetamine-induced neurotoxicity mechanisms across all publications each year (not limited to Nature Index journals).

Technical terms

Pyroptosis: A form of programmed cell death driven by inflammasome activation and characterised by cell swelling, membrane rupture and release of proinflammatory mediators.

Inflammasome: A multiprotein complex in immune cells that detects danger signals and activates inflammatory caspases, leading to cytokine maturation and pyroptosis.

Oxidative stress: An imbalance between reactive oxygen species production and antioxidant defences, resulting in cellular and mitochondrial damage.

Excitotoxicity: Neuronal injury triggered by excessive activation of excitatory neurotransmitter receptors, particularly glutamate receptors, leading to calcium overload and cell death.

Neuroinflammation: An inflammatory response within the central nervous system involving microglia, astrocytes and cytokine release that can exacerbate neuronal injury.

Endoplasmic reticulum stress: A cellular condition in which misfolded proteins accumulate in the endoplasmic reticulum, activating unfolded protein responses that can lead to apoptosis or autophagy.

References

1. Methamphetamine-mediated astrocytic pyroptosis and neuroinflammation involves miR-152–NLRP6 inflammasome signaling axis. Redox Biology (2025).
2. The Main Molecular Mechanisms Underlying Methamphetamine- Induced Neurotoxicity and Implications for Pharmacological Treatment. Frontiers in Molecular Neuroscience (2018).
3. Methamphetamine neurotoxicity, microglia, and neuroinflammation. Journal of Neuroinflammation (2018).
4. Nupr1 Modulates Methamphetamine-Induced Dopaminergic Neuronal Apoptosis and Autophagy through CHOP-Trib3-Mediated Endoplasmic Reticulum Stress Signaling Pathway. Frontiers in Molecular Neuroscience (2017).
5. Methamphetamine effects on blood-brain barrier structure and function. Frontiers in Neuroscience (2015).