Decomposing risky decision-making in methamphetamine use disorder: Behavioral updating and D2 dopamine receptors.

Autor: Guttman Z; Department of Psychiatry and Biobehavioral Sciences and Jane and Terry Semel Institute of Neuroscience and Human Behavior, University of California Los Angeles, Los Angeles, CA 90024, USA., Mandelkern M; Veterans Administration of Greater Los Angeles Health System, Los Angeles, CA 90073, USA; Department of Physics, University of California at Irvine, Irvine, CA 92697, USA., Ghahremani DG; Department of Psychiatry and Biobehavioral Sciences and Jane and Terry Semel Institute of Neuroscience and Human Behavior, University of California Los Angeles, Los Angeles, CA 90024, USA., Kohno M; Department of Psychiatry, Oregon Health & Science University, Oregon Health Sciences University, Portland, OR 97239, USA., Dean AC; Department of Psychiatry and Biobehavioral Sciences and Jane and Terry Semel Institute of Neuroscience and Human Behavior, University of California Los Angeles, Los Angeles, CA 90024, USA., London ED; Department of Psychiatry and Biobehavioral Sciences and Jane and Terry Semel Institute of Neuroscience and Human Behavior, University of California Los Angeles, Los Angeles, CA 90024, USA; Veterans Administration of Greater Los Angeles Health System, Los Angeles, CA 90073, USA; Department of Molecular and Medical Pharmacology, University of California Los Angeles, Los Angeles, CA 90024, USA; Brain Research Institute, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90024, USA. Electronic address: elondon@mednet.ucla.edu.
Jazyk: angličtina
Zdroj: Drug and alcohol dependence [Drug Alcohol Depend] 2023 May 01; Vol. 246, pp. 109860. Date of Electronic Publication: 2023 Mar 29.
DOI: 10.1016/j.drugalcdep.2023.109860
Abstrakt: Background: Escalating misuse of amphetamine-type stimulants, mainly methamphetamine, has led to a staggering rise in associated overdose deaths and a pressing need to understand the basis of methamphetamine use disorder (MUD). MUD is characterized by disadvantageous decision-making, and people with MUD perform below controls on the Balloon Analogue Risk Task (BART), a laboratory test of decision-making under uncertainty. The BART presents a series of choices with progressively higher stakes-greater risk of loss and greater potential monetary reward. This research aimed to clarify whether impaired behavioral updating contributes to maladaptive performance on the BART.
Methods: Two groups (28 drug-abstinent participants with MUD and 16 healthy control participants) were compared on BART performance. Using a computational model, we deconstructed behavior into risk-taking and behavioral updating. A subset of participants (22 MUD, 15 healthy control) underwent [ 18 F]fallypride positron emission tomography scans to measure dopamine D2-type receptor availability (BPND) in the striatum (caudate and accumbens nuclei and putamen) and the globus pallidus.
Results: Participants with MUD exhibited slower behavioral updating than the healthy controls (p = 0.0004, d=1.77). BPND in all four bilateral volumes of interest were higher in the healthy control group (ps < 0.005, ds < 2.16), and updating rate correlated positively with BPND in the caudate nucleus (p = 0.002), putamen (p = 0.002), and globus pallidus (p = 0.03).
Conclusions: The findings indicate that behavioral updating contributes to maladaptive decision-making in MUD and suggest that dysregulation of D2-type receptor signaling in the striatum and globus pallidus contributes to this behavioral deficit.
Competing Interests: Conflict of interest The authors have no conflicts of interest or financial disclosures to report.
(Copyright © 2023 The Authors. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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