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Updated: Mar 19, 2026

A General Method for Evaluating Deep Brain Stimulation Effects on Intravenous Methamphetamine Self-Administration

A General Method for Evaluating Deep Brain Stimulation Effects on Intravenous Methamphetamine Self-Administration

Published on: January 22, 2016

Chronic Methamphetamine Effects on Brain Structure and Function in Rats.

Panayotis K Thanos¹, Ronald Kim², Foteini Delis³

¹Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions, Research Institute on Addictions, University at Buffalo, Buffalo, NY, United States of America.

|June 9, 2016

Summary

This summary is machine-generated.

Chronic methamphetamine (MA) use causes brain structure changes and altered glucose metabolism in rats. These findings in MA addiction research support clinical observations of neurotoxicity.

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Area of Science:

Neuroscience
Toxicology
Addiction Research

Background:

Methamphetamine (MA) addiction is a global health crisis.
Chronic MA use is linked to neurotoxicity, with human studies showing enlarged striatal volumes and reduced brain glucose metabolism (BGluM).

Purpose of the Study:

To investigate the effects of chronic MA treatment on brain structure, microglial activation, and brain function in a rodent model.
To correlate neurochemical and metabolic changes with structural alterations.

Main Methods:

Rats received daily i.p. injections of saline, low-dose MA (4 mg/kg), or high-dose MA (8 mg/kg) for four months.
Brain structure and volume were assessed using 21T MRI.
Microglial activation was measured via [3H]PK 11195 autoradiography.
Regional BGluM was evaluated using [18F] fluorodeoxyglucose (FDG) micro-PET imaging.

Main Results:

High-dose MA treatment led to enlarged striatal volumes and increased microglial activation in the striatum, nucleus accumbens, frontal cortex, rhinal cortices, and cerebellar nuclei.
Low-dose MA increased BGluM in specific cortical and thalamic regions, while high-dose MA increased BGluM in somatosensory and retrosplenial cortices.
Both doses reduced BGluM in the striatum tail, rhinal cortex, and subiculum, with high-dose MA also decreasing hippocampal BGluM.

Conclusions:

Chronic MA exposure induces significant structural and functional brain changes in rats, including neuroinflammation and altered glucose metabolism.
These preclinical findings corroborate human clinical observations of MA-induced neurotoxicity.
The study provides insights into the mechanisms underlying methamphetamine addiction and its neurological consequences.