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Imaging Biomarkers of the Neuroimmune System among Substance Use Disorders: A Systematic Review.

ABSTRACT: There is tremendous interest in the role of the neuroimmune system and inflammatory processes in substance use disorders (SUDs). Imaging biomarkers of the neuroimmune system in vivo provide a vital translational bridge between preclinical and clinical research. Herein, we examine two imaging techniques that measure putative indices of the neuroimmune system and review their application among SUDs. Positron emission tomography (PET) imaging of 18 kDa translocator protein availability is a marker associated with microglia. Proton magnetic resonance spectroscopy quantification of myo-inositol levels is a putative glial marker found in astrocytes. Neuroinflammatory responses are initiated and maintained by microglia and astrocytes, and thus represent important imaging markers. The goal of this review is to summarize neuroimaging findings from the substance use literature that report data using these markers and discuss possible mechanisms of action. The extant literature indicates abused substances exert diverse and complex neuroimmune effects. Moreover, drug effects may change across addiction stages, i.e. the neuroimmune effects of acute drug administration may differ from chronic use. This burgeoning field has considerable potential to improve our understanding and treatment of SUDs. Future research is needed to determine how targeting the neuroimmune system may improve treatment outcomes.

SUBMITTER: Woodcock EA

PROVIDER: S-EPMC6597912 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature

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Imaging Biomarkers of the Neuroimmune System among Substance Use Disorders: A Systematic Review.

Woodcock Eric A EA Hillmer Ansel T AT Mason Graeme F GF Cosgrove Kelly P KP

Molecular neuropsychiatry 20190509 3

There is tremendous interest in the role of the neuroimmune system and inflammatory processes in substance use disorders (SUDs). Imaging biomarkers of the neuroimmune system in vivo provide a vital translational bridge between preclinical and clinical research. Herein, we examine two imaging techniques that measure putative indices of the neuroimmune system and review their application among SUDs. Positron emission tomography (PET) imaging of 18 kDa translocator protein availability is a marker ...[more]

PMID: 31312635

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Project description:Background and aimsThe ability to regulate emotions effectively has been associated with resilience to psychopathology. Individuals with substance use disorders (SUDs) have been shown to have higher levels of negative emotionality, with some evidence suggesting impairment in emotion regulation compared with individuals without SUDs. However, no previous attempt has been made to systematically review the literature to assess the magnitude of this difference. We aimed to assess the association between SUD diagnosis and emotion regulation as measured by the Difficulties in Emotion Regulation Scale (DERS) and Emotion Regulation Questionnaire (ERQ) through a systematic review and meta-analysis of existing findings.MethodsThe systematic review was conducted using PubMed, PsycINFO and Embase. We examined cross-sectional studies that compared a SUD group with a control group and measured emotion regulation using the DERS or the ERQ. The primary analysis focused on papers using the DERS, as this was the predominant instrument in the literature.ResultsTwenty-two studies met our primary analysis criteria, representing 1936 individuals with a SUD and 1567 controls. Individuals with SUDs relative to controls had significantly greater DERS scores, with a mean difference of 21.44 [95% confidence interval (CI) = 16.49-26.40, P < 0.001] and Hedges' g = 1.05 (95% CI = 0.86-1.24, P < 0.001). The difference was robust, remaining significant after removing outliers and studies with high risk of bias. Individuals with SUDs demonstrated poorer emotion regulation on each subscale of the DERS, with the largest deficits in the Strategies and Impulse subscales. The ERQ analysis revealed greater use of expressive suppression in those with SUDs relative to controls (Hedges' g = 0.76, 95% CI = 0.25-1.28, P = 0.004).ConclusionsPeople with substance use disorders appear to have greater difficulties in emotion regulation than people without substance use disorders.

Project description:Purpose of the reviewThe prevalence of mental and substance use disorders is three to five times higher than that of the general population. Psychosocial interventions are effective in identifying and managing mental health and substance use disorders. This article aims to review the randomized control studies which have used nonpharmacological interventions alone or in combination with pharmacological interventions for managing mental and substance use disorders in prison/correctional settings.Collection and analysis of dataStudies included were randomized control trials and pilot randomized studies that assessed the impact of psychosocial interventions for prisoners with mental disorders and substance use disorders. A comprehensive search for articles was done by the primary author (Sreekanth Nair Thekkumkara) in the following databases: PubMed, ProQuest, PsychArticles, and Google Scholar (search engine), for the period June 1, 2000, to December 31, 2020.Results and conclusionsThe 21 studies included in the review had a sample size of 34 to 759. The settings of all the interventions were the prison and different types of psychosocial interventions were provided across the studies. The average duration of intervention ranged between 10 min and 120 min with the frequency of one to six sessions per week for 1 to 36 months. All the 21 Randomized Control Trials (RCTs) were nonIndian studies. Overall, the results of the included studies showed significant improvement postintervention (motivational intervention, interpersonal therapy, cognitive behavior therapy, positive psychology intervention, music therapy, and acceptance and commitment therapy) on primary outcome measures such as symptom severity of depression, anxiety, and substance abuse prisoners. Positive effects were observed on secondary outcome measures such as motivation, aggression, follow up rates, and recidivism. A limited number of studies have focused on evaluating psychosocial interventions in prison settings. Most of the interventions were tested in prisoners with substance use disorder alone or in those with dual diagnoses and in high-income countries.

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Imaging Biomarkers of the Neuroimmune System among Substance Use Disorders: A Systematic Review.

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Imaging Biomarkers of the Neuroimmune System among Substance Use Disorders: A Systematic Review.

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