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- Feltmann, K, et al.
(författare)
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Illicit Drug Use and Associated Problems in the Nightlife Scene: A Potential Setting for Prevention
- 2021
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Ingår i: International journal of environmental research and public health. - : MDPI AG. - 1660-4601. ; 18:9
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Tidskriftsartikel (refereegranskat)abstract
- Illicit drug use is prevalent in the nightlife scene, especially at electronic dance music (EDM) events. The aim of the present study was to investigate illicit drug use patterns and consequences of drug use among frequent visitors of EDM events. Young adults (18–34 years old) who had visited at least six EDM events in Sweden during the past year participated in a web-based survey on drug use patterns and its consequences. Fifty-nine percent of participants had used illicit drugs during the past year, most often cannabis followed by ecstasy, cocaine, and amphetamine. Nightlife venues were identified as the main setting for the use of central stimulants, while cannabis was mostly used at home. Frequent alcohol and tobacco use was associated with illicit drug use. The most prevalent negative consequences of drug use were related to mental health, such as impairments in mood, sleep, and memory problems, but physical manifestations were also reported, such as palpitations and collapsing. These findings confirm that drug use is prevalent and associated with negative health effects among EDM nightlife attendees. The nightlife scene is a setting with promising potential to reach a high-risk target group with illicit drug use prevention interventions.
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- Guterstam, J, et al.
(författare)
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The Hypothesis of Subliminal Cue Reactivity in Addiction Revisited: An fMRI Study
- 2022
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Ingår i: European addiction research. - : S. Karger AG. - 1421-9891 .- 1022-6877. ; 28:3, s. 210-219
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Tidskriftsartikel (refereegranskat)abstract
- <b><i>Introduction:</i></b> Exposure to conditioned cues is a common trigger of relapse in addiction. It has been suggested that such cues can activate motivationally relevant neurocircuitry in individuals with substance use disorders even without being consciously perceived. We aimed to see if this could be replicated in a sample with severe amphetamine use disorder and a control group of healthy subjects. <b><i>Methods:</i></b> We used fMRI to test the hypothesis that individuals with amphetamine use disorder, but not healthy controls, exhibit a specific neural reactivity to subliminally presented pictures related to amphetamine use. Twenty-four amphetamine users and 25 healthy controls were recruited and left data of sufficient quality to be included in the final analysis. All subjects were exposed to drug-related and neutral pictures of short duration (13.3 ms), followed by a backward visual mask image. The contrast of interest was drug versus neutral subliminal pictures. <b><i>Results:</i></b> There were no statistically significant differences in BOLD signal between the drug and neutral cues, neither in the limbic regions of primary interest nor in exploratory whole-brain analyses. The same results were found both in amphetamine users and controls. <b><i>Discussion/Conclusion:</i></b> We found no evidence of neural reactivity to subliminally presented drug cues in this sample of subjects with severe amphetamine dependence. These results are discussed in relation to the earlier literature, and the evidence for subliminal drug cue reactivity in substance use disorders is questioned.
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- Ingesson, S, et al.
(författare)
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Psychometric evaluation of a Swedish version of the Impaired Control Scale for individuals with alcohol use disorder
- 2022
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Ingår i: Nordisk alkohol- & narkotikatidskrift : NAT. - : SAGE Publications. - 1458-6126. ; 39:5, s. 553-567
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Tidskriftsartikel (refereegranskat)abstract
- Aim: The aim of this study was to evaluate the psychometric properties of a Swedish version of the Impaired Control Scale. Impaired control (IC) over alcohol consumption is a core symptom of alcohol use disorder and a predictor of treatment outcome, but measures of IC are not well utilised in clinical practice. Methods: The study comprised 250 individuals from a randomised controlled trial conducted at an adult outpatient addiction clinic in Sweden. The statistical analyses concern dimensionality, convergent and divergent validity, reliability, measurement invariance and sensitivity to change. Results: Regarding dimensionality, a principal component analysis of the standardised residuals from a Rasch model indicated some evidence of further dimensions underlying the responses in the Failed Control (FC) and Perceived Control (PC) parts. Two parallel items (12 and 22 respectively) seemed to drive potential multidimensionality. When these items were excluded, goodness of fit to one-dimensional models was improved. Tests of convergent and divergent validity showed that failed control had the strongest associations to impaired control and alcohol use disorder while the attempted control part was not associated with the construct of impaired control or alcohol use disorder. Conclusion: The present results show that the FC part is the most valid measure of the underlying construct of IC. In addition, FC had close to a large effect in regard to sensitivity to change. This suggests that the FC part has potential utility for use as an assessment and evaluation tool of treatment effect on impaired control of drinking.
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- Jayaram-Lindstrom, N., et al.
(författare)
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Naltrexone modulates dopamine release following chronic, but not acute amphetamine administration: a translational study
- 2017
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Ingår i: Translational Psychiatry. - : Springer Science and Business Media LLC. - 2158-3188. ; 7
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Tidskriftsartikel (refereegranskat)abstract
- The opioid antagonist naltrexone has been shown to attenuate the subjective effects of amphetamine. However, the mechanisms behind this modulatory effect are currently unknown. We hypothesized that naltrexone would diminish the striatal dopamine release induced by amphetamine, which is considered an important mechanism behind many of its stimulant properties. We used positron emission tomography and the dopamine D2-receptor radioligand [C-11]raclopride in healthy subjects to study the dopaminergic effects of an amphetamine injection after pretreatment with naltrexone or placebo. In a rat model, we used microdialysis to study the modulatory effects of naltrexone on dopamine levels after acute and chronic amphetamine exposure. In healthy humans, naltrexone attenuated the subjective effects of amphetamine, confirming our previous results. Amphetamine produced a significant reduction in striatal radioligand binding, indicating increased levels of endogenous dopamine. However, there was no statistically significant effect of naltrexone on dopamine release. The same pattern was observed in rats, where an acute injection of amphetamine caused a significant rise in striatal dopamine levels, with no effect of naltrexone pretreatment. However, in a chronic model, naltrexone significantly attenuated the dopamine release caused by reinstatement of amphetamine. Collectively, these data suggest that the opioid system becomes engaged during the more chronic phase of drug use, evidenced by the modulatory effect of naltrexone on dopamine release following chronic amphetamine administration. The importance of opioid-dopamine interactions in the reinforcing and addictive effects of amphetamine is highlighted by the present findings and may help to facilitate medication development in the field of stimulant dependence.
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- Kallmen, H, et al.
(författare)
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Psychometric Properties of the AUDIT, AUDIT-C, CRAFFT and ASSIST-Y among Swedish Adolescents
- 2019
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Ingår i: European addiction research. - : S. Karger AG. - 1421-9891 .- 1022-6877. ; 25:2, s. 68-77
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Tidskriftsartikel (refereegranskat)abstract
- <b><i>Background/Aims:</i></b> Not enough is known about the psychometric properties of screening instruments for problematic alcohol consumption among adolescents. The aim of the current study was to evaluate and compare the performance of the screening instruments: Alcohol Use Disorders Identification Test (AUDIT), AUDIT-C, CRAFFT, and the alcohol domain of Alcohol, Smoking and Substance Involvement Screening Test-Youth (ASSIST-Y) among adolescents and to suggest optimal cut-offs indicating problematic use. <b><i>Methods:</i></b> Data was collected from a general population sample (<i>n</i> = 1,421) and a treatment-seeking sample (<i>n</i> = 59) using electronic versions of the instruments. <b><i>Results:</i></b> The internal consistencies for the instruments were fair (alpha’s AUDIT 0.74, AUDIT-C 0.75, CRAFFT 0.67, ASSIST-Y 0.62), and test-retest reliabilities were good to excellent (intraclass correlation coefficients AUDIT 0.86, AUDIT-C 0.93, CRAFFT 0.77, ASSIST-Y 0.63). The CRAFFT and ASSIST-Y demonstrated reasonable construct validities while factor solutions for AUDIT and AUDIT-C could not be determined. The optimal cut-off score was 2 for both CRAFFT and ASSIST-Y (61 and 73% sensitivities and 79 and 65% specificities, respectively), while sensitivity scores were poor for AUDIT and AUDIT-C. <b><i>Conclusion:</i></b> Based on the current sample, ASSIST-Y and the CRAFFT performed better than AUDIT and AUDIT-C. Health-care clinics working with adolescents should carefully consider their choice of screening instruments.
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- Khemiri, L, et al.
(författare)
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Family History of Alcohol Abuse Associated with Higher Impulsivity in Patients with Alcohol Use Disorder: A Multisite Study
- 2020
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Ingår i: European addiction research. - : S. Karger AG. - 1421-9891 .- 1022-6877. ; 26:2, s. 85-95
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Tidskriftsartikel (refereegranskat)abstract
- <b><i>Background:</i></b> Alcohol use disorder (AUD) is to a high degree heritable, and in clinical practice it is common to assert presence of alcohol abuse family history (FH) in treatment-seeking AUD patients. Patients with AUD also exhibit cognitive deficits, including elevated impulsivity and impairments in executive functions (EF), but less is known regarding the relation between FH and these cognitive domains. The aim of the current study was to investigate if alcohol abuse FH in AUD patients is associated with a specific cognitive profile. <b><i>Methods:</i></b> Patients with AUD (<i>n</i> = 197) from Sweden (<i>n</i> = 106) and Belgium (<i>n</i> = 91) were recruited. Self-rated impulsivity was assessed by the Barratt Impulsiveness Scale (BIS). EF assessed were response inhibition (stop signal task), attention (rapid visual processing task), and working memory (digit span). A series of linear regression models were run to explore the effect of FH on cognitive outcomes. <b><i>Results:</i></b> A FH of alcohol abuse was associated with elevated score in self-rated impulsivity assessed by the BIS, with the greatest effect on the subscale of nonplanning. There was no statistically significant association between FH and any of the other neuropsychological task outcomes. <b><i>Conclusion:</i></b> Presence of alcohol abuse FH within AUD patients could be a marker of higher impulsivity, which may have clinical implications regarding diagnostic evaluation and treatment.
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| 49. |
- Khemiri, L., et al.
(författare)
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The effects of the monoamine stabilizer (-)-OSU6162 on craving in alcohol dependent individuals: A human laboratory study
- 2015
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Ingår i: European Neuropsychopharmacology. - : Elsevier BV. - 0924-977X. ; 25:12, s. 2240-2251
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Tidskriftsartikel (refereegranskat)abstract
- Alcohol dependence is associated with a dysregulated dopamine system modulating reward, craving and cognition. The monoamine stabilizer (-)OSU6162 (OSU6162) can counteract both hyper- and hypo-dopaminergic states and we recently demonstrated that it attenuates alcohol-mediated behaviors in long-term drinking rats. The present Phase II exploratory human laboratory study investigated to our knowledge for the first time the effects of OSU6162 on cue- and priming-induced craving in alcohol dependent individuals. Fifty-six alcohol dependent individuals were randomized to a 14-day-treatment period of OSU6162 or placebo after their baseline impulsivity levels had been determined using the Stop Signal Task. On Day 15, participants were subjected to a laboratory alcohol craving test comprised of craving sessions induced by: i) active - alcohol specific cues, ii) neutral stimuli and iii) priming - intake of an alcoholic beverage (0.20 g ethanol/kg bodyweight). Subjective ratings of alcohol craving were assessed using the shortened version of the Desire for Alcohol Questionnaire and visual analog scales (VAS). OSU6162 treatment had no significant effect on cue-induced alcohol craving, but significantly attenuated priming-induced craving. Exploratory analysis revealed that this effect was driven by the individuals with high baseline impulsivity. In addition, OSU6162 significantly blunted the subjective liking of the consumed alcohol (VAS). Although the present 14-day-treatment period, showed that OSU6162 was safe and well tolerated, this exploratory human laboratory study was not designed to evaluate the efficacy of OSU6162 to affect alcohol consumption. Thus a larger placebo-controlled efficacyclinical trial is needed to further investigate the potential of OSU6162 as a novel medication for alcohol dependence. (C) 2015 Elsevier B.V. and ECNP. All rights reserved.
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