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A General Method for Evaluating Deep Brain Stimulation Effects on Intravenous Methamphetamine Self-Administration
Published on: January 22, 2016
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Emotion dysregulation and amygdala dopamine D2-type receptor availability in methamphetamine users
Kyoji Okita1, Dara G Ghahremani2, Doris E Payer3
1Department of Psychiatry and Biobehavioral Sciences, Los Angeles, CA 90024, USA; Department of Research, VA Greater Los Angeles Healthcare System, Los Angeles, CA 90073, USA.
Drug and Alcohol Dependence
|February 17, 2016
Summary
Chronic methamphetamine use is linked to emotion regulation difficulties and altered dopamine D2 receptors in the amygdala. These findings suggest a role for amygdala dopamine in regulating emotions for all individuals.
Area of Science:
- Neuroscience
- Psychiatry
- Addiction Research
Background:
- Chronic methamphetamine use is associated with emotional and dopaminergic neurochemical deficits.
- The amygdala's role in emotion processing and dopaminergic innervation suggests its involvement in emotion regulation.
- Understanding dopamine's function in the amygdala is crucial for addressing emotional deficits in methamphetamine dependence.
Purpose of the Study:
- To evaluate emotion regulation in individuals with methamphetamine dependence.
- To investigate the relationship between self-reported emotion regulation difficulties and D2-type dopamine receptor availability in the amygdala.
Main Methods:
- Utilized the Difficulties in Emotion Regulation Scale (DERS) and Addiction Severity Index (ASI) in 94 methamphetamine users and 102 controls.
- Employed positron emission tomography (PET) with [(18)F]fallypride to measure amygdala D2-type dopamine receptor binding potential (BPND) in a subset of participants.
Main Results:
- Methamphetamine users reported significantly higher difficulties in emotion regulation (DERS) compared to controls.
- DERS scores positively correlated with drug use severity (ASI) in the methamphetamine group.
- A positive correlation was observed between DERS total score and amygdala D2-type dopamine receptor availability (BPND) in both methamphetamine users and healthy controls.
Conclusions:
- Methamphetamine use is associated with significant emotion regulation problems, potentially leading to behavioral issues.
- D2-type dopamine receptors in the amygdala appear to play a role in emotion regulation across both healthy and methamphetamine-dependent individuals.
- These findings underscore the importance of targeting dopaminergic pathways in the amygdala for therapeutic interventions in methamphetamine addiction.
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