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Updated: Jan 2, 2026
Modeling Neuronal Death and Degeneration in Mouse Primary Cerebellar Granule Neurons
Published on: November 6, 2017
Methamphetamine induces neuronal death: Evidence from rodent studies
Sabrini Sabrini1, Bruce Russell2, Grace Wang3
1School of Pharmacy, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland 1142 New Zealand.
Abstract:
Animal studies have consistently observed neuronal death following methamphetamine (MA) administration, however, these have not been systematically reviewed. This systematic review aims to present the evidence for MA-induced neuronal death in animals (rodents) and identify the regions affected. Locating the brain regions in which neuronal death occurs in animal studies will provide valuable insight into the linkage between MA consumption and the structural alterations observed in the human brain. The data were collected from three databases: Scopus, Ovid, and the Web of Science. Thirty-seven studies met the inclusion criteria and were divided into two sub-groups, i.e. acute and repeated administration. Twenty-six (of 27) acute and ten (of 11) repeated administration studies observed neuronal death. A meta-analysis was not possible due to different variables between studies, i.e. species, treatment regimens, withdrawal periods, methods of quantification, and regions studied. Acute MA treatment induced neuronal death in the frontal cortex, striatum, and substantia nigra, but not in the hippocampus, whereas repeated MA administration led to neuronal loss in the hippocampus, frontal cortex, and striatum. In addition, when animals self-administered the drug, neuronal death was observed at much lower doses than the doses administered by experimenters. There is some overlap in the regions where neuronal death occurred in animals and the identified regions from human studies. For instance, gray matter deficits have been observed in the prefrontal cortex and hippocampus of MA users. The findings presented in this review implicate that not only does MA induce neuronal death in animals, but it also damages the same regions affected in human users. Despite the inter-species differences, animal studies have contributed significantly to addiction research, and are still of great assistance for future research with a more relevant model of compulsive drug use in humans.
Insights
Methamphetamine (MA) causes brain cell death in rodents, affecting regions like the frontal cortex and striatum. Animal studies reveal damage in areas also impacted by MA use in humans, aiding addiction research.
Area of Science:
- Neuroscience
- Toxicology
- Pharmacology
Background:
- Methamphetamine (MA) use is linked to structural brain alterations in humans.
- Previous animal studies suggest MA causes neuronal death, but this evidence lacks systematic review.
- Understanding MA's neurotoxic effects in animal models is crucial for human brain research.
Purpose of the Study:
- To systematically review evidence of MA-induced neuronal death in animal models (rodents).
- To identify specific brain regions affected by MA administration in these studies.
- To correlate animal findings with human studies on MA-related brain damage.
Main Methods:
- Systematic literature search across Scopus, Ovid, and Web of Science databases.
- Inclusion of 37 studies examining MA effects on animal neuronal death.
- Categorization of studies into acute and repeated MA administration groups.
Main Results:
- Twenty-six of 27 acute MA studies and 10 of 11 repeated MA studies reported neuronal death.
- Acute MA induced death in frontal cortex, striatum, and substantia nigra; repeated MA affected the hippocampus, frontal cortex, and striatum.
- Self-administered MA caused neuronal death at lower doses compared to experimenter-administered doses.
Conclusions:
- Methamphetamine administration demonstrably causes neuronal death in various brain regions of rodents.
- Affected regions in animal models show overlap with areas impacted by MA use in humans, such as the prefrontal cortex and hippocampus.
- Animal studies, despite inter-species differences, provide valuable insights into MA neurotoxicity and addiction mechanisms.
