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Neural responses to cues paired with methamphetamine in healthy volunteers
Univ Chicago, IL 60637 USA.
Univ Chicago, IL 60637 USA.
Linköping University, Department of Clinical and Experimental Medicine, Center for Social and Affective Neuroscience. Linköping University, Faculty of Medicine and Health Sciences.
Linköping University, Department of Clinical and Experimental Medicine, Center for Social and Affective Neuroscience. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Local Health Care Services in Central Östergötland, Department of Psychiatry.
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2018 (English)In: Neuropsychopharmacology, ISSN 0893-133X, E-ISSN 1740-634X, Vol. 43, no 8, p. 1732-1737Article in journal (Refereed) Published
Abstract [en]

Drug cues, or conditioned responses to stimuli paired with drugs, are widely believed to promote drug use. The acquisition of these conditioned responses has been well characterized in laboratory animals: neutral stimuli paired with drugs elicit conditioned responses resembling the motivational and incentive properties of the drug itself. However, few studies have examined acquisition of conditioning, or the nature of the conditioned response, in humans. In this study, we used fMRI to examine neural responses to stimuli that had been paired with methamphetamine or placebo in healthy young adults. Participants first underwent four conditioning sessions in which visual-auditory stimuli were paired with either methamphetamine (20 mg, oral) or placebo. Then on a drug-free test day, the stimuli were presented during an fMRI scan to assess neural responses to the stimuli. We hypothesized that the stimuli would elicit drug-like brain activity, especially in regions related to reward. Instead, we found that the methamphetamine-paired stimuli, compared to placebo-paired stimuli, produced greater activation in regions related to visual and auditory processing, consistent with the drugs unconditioned effects on sensory processing. This is the first study to demonstrate conditioned neural responses to drug-paired stimuli after just two pairings of methamphetamine in healthy adults. The study also illustrates that conditioned responses may develop to unexpected components of the drugs effects.

Place, publisher, year, edition, pages
Nature Publishing Group, 2018. Vol. 43, no 8, p. 1732-1737
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Pharmacology and Toxicology
Identifiers
URN: urn:nbn:se:liu:diva-149467DOI: 10.1038/s41386-017-0005-5ISI: 000435633100015PubMedID: 29463908OAI: oai:DiVA.org:liu-149467DiVA, id: diva2:1231088
Note

Funding Agencies|NIMH [T32MH020065]; [DA037011]; [S10OD018448]

Available from: 2018-07-05 Created: 2018-07-05 Last updated: 2018-08-10

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Mayo, Leah M.Heilig, Markus
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Center for Social and Affective NeuroscienceFaculty of Medicine and Health SciencesDepartment of Psychiatry
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