Structural and metabolic brain changes in the striatum associated with methamphetamine abuse

Area of Science:

• Neuroimaging
• Neuroscience
• Addiction Medicine

Background:

• Methamphetamine use is associated with significant neurotoxicity.
• Prenatal exposure to methamphetamine can lead to developmental brain abnormalities.

Purpose of the Study:

• To review brain structural, chemical, and metabolic changes in methamphetamine users.
• To examine these changes in children with prenatal methamphetamine exposure, focusing on the basal ganglia.

Main Methods:

• Review of magnetic resonance imaging (MRI) and positron emission tomography (PET) studies.
• Inclusion of relevant pre-clinical studies for interpretation.

Main Results:

• Adult users show enlarged striatal volumes but reduced neuronal markers in the basal ganglia.
• Exposed children exhibit smaller striatal structures and elevated total creatine.
• Reduced dopamine transporter (DAT) density, dopamine D(2) receptors, and altered glucose metabolism were observed in users.

Conclusions:

• Neuroimaging confirms brain structure and chemistry abnormalities in methamphetamine users and exposed children, especially in the striatum.
• Larger sample sizes and longitudinal studies are required for validation and to assess treatment effects.
• Potential for imaging and genetic markers to predict treatment outcomes warrants further investigation.