Sex-Dependent Differences in the Neural Correlates of Cocaine and Emotional Cue-Reactivity in Regular Cocaine Users and Non-Drug-Using Controls: Understanding the Role of Duration and Severity of Use.
Stephan Tap, Eila van Stipriaan, Anna E Goudriaan, Anne Marije Kaag
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引用次数: 0
Abstract
Introduction: The development of cocaine use disorder in females is suggested to be more strongly related to neural mechanisms underlying stress-reactivity, whereas in males it is suggested to be more strongly related to neural mechanisms underlying drug cue-reactivity. Existing evidence, however, is based on neuroimaging studies that either lack a control group and/or have very small sample sizes that do not allow to investigate sex differences.
Methods: The main objective of the current study was to investigate sex differences in the neural correlates of cocaine and negative emotional cue-reactivity within high-risk intranasal cocaine users (CUs: 31 males and 26 females) and non-cocaine-using controls (non-CUs: 28 males and 26 females). A region of interest (ROI) analysis was applied to test for the main and interaction effects of group, sex, and stimulus type (cocaine cues vs. neutral cocaine cues and negative emotional cues vs. neutral emotional cues) on activity in the dorsal striatum, ventral striatum (VS), amygdala, and dorsal anterior cingulate cortex (dACC).
Results: There were no significant sex or group differences in cocaine cue-reactivity in any of the ROIs. Results did reveal significant emotional cue-reactivity in the amygdala and VS, but these effects were not moderated by group or sex. Exploratory analyses demonstrated that emotional cue-induced activation of the dACC and VS was negatively associated with years of regular cocaine use in female CUs, while this relationship was absent in male CUs.
Conclusions: While speculative, the sex-specific associations between years of regular use and emotional cue-reactivity in the dACC and VS suggest that, with longer years of use, female CUs become less sensitive to aversive stimuli, including the negative consequences of cocaine use, which could account for the observed "telescoping effect" in female CUs.
期刊介绍：
''European Addiction Research'' is a unique international scientific journal for the rapid publication of innovative research covering all aspects of addiction and related disorders. Representing an interdisciplinary forum for the exchange of recent data and expert opinion, it reflects the importance of a comprehensive approach to resolve the problems of substance abuse and addiction in Europe. Coverage ranges from clinical and research advances in the fields of psychiatry, biology, pharmacology and epidemiology to social, and legal implications of policy decisions. The goal is to facilitate open discussion among those interested in the scientific and clinical aspects of prevention, diagnosis and therapy as well as dealing with legal issues. An excellent range of original papers makes ‘European Addiction Research’ the forum of choice for all.
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