Oral methylphenidate normalizes cingulate activity in cocaine addiction during a salient cognitive task

Area of Science:

• Neuroscience
• Psychiatry
• Addiction Research

Background:

• Anterior cingulate cortex (ACC) hypoactivations are a key deficit in cocaine-use disorders (CUD).
• Methylphenidate (MPH) can normalize cortical function in other brain disorders but has shown limited efficacy in CUD treatment.
• Previous research indicates ACC dysfunction during cognitive tasks in CUD.

Purpose of the Study:

• To investigate if oral MPH can reduce ACC hypoactivations during a salient cognitive task in individuals with CUD.
• To assess the impact of MPH on cognitive performance and impulsivity in CUD during drug cue reactivity.
• To examine functional magnetic resonance imaging (fMRI) responses in ACC subdivisions.

Main Methods:

• A functional MRI study involving 13 individuals with CUD and 14 healthy controls.
• Participants completed a rewarded drug cue-reactivity task after ingesting either oral MPH (20 mg) or placebo in a counterbalanced manner.
• Analysis focused on ACC activity, errors of commission, and task accuracy.

Main Results:

• Oral MPH significantly increased brain responses in both major ACC subdivisions in individuals with CUD.
• These functional changes were associated with reduced errors of commission, a measure of impulsivity.
• Task accuracy improved, particularly during the drug cue-reactivity condition, across all participants.

Conclusions:

• Single-dose oral MPH can normalize ACC function during salient cognitive tasks in individuals with CUD.
• MPH-induced brain-behavior enhancements suggest potential therapeutic avenues, though clinical utility requires further investigation.
• The findings highlight the role of ACC in CUD and the modulatory effects of MPH on cognitive control circuits.