Acute effects of delta-9-tetrahydrocannabinol (THC) on resting state brain function and their modulation by COMT genotype Matthijs G. Bossong, Hendrika H. van Hell, Chris D. Schubart, Wesley van Saane, Tabitha A. Iseger, Gerry Jager, Matthias J.P. van Osch, J. Martijn Jansma, René S. Kahn, Marco P. Boks, Nick F. Ramsey European Neuropsychopharmacology, 2019, 13, 56, 1–11 https://doi.org/10.1016/j.euroneuro.2019.03.010 Abstract Cannabis produces a broad range of acute, dose-dependent psychotropic effects. Only a limited number of neuroimaging studies have mapped these effects by examining the impact of cannabis on resting state brain neurophysiology. Moreover, how genetic variation influences the acute effects of cannabis on resting state brain function [...]
Lire la suiteConsideration of Ayahuasca for the Treatment of Post-traumatic Stress Disorder Jessica L. NIELSON, & Julie D. MEGLER MAPS Bulletin Annual Report, Winter 2012, 29-31. THERE IS A GROWING AMOUNT OF RESEARCH on the development of PTSD and its various treatments. The fact that many people who su!er from PTSD struggle with the currently approved therapeutic options that are available to them suggests that we need to start exploring alternative strategies to treat this disorder.1 With the large number of veterans returning home from war that may have or will develop PTSD, we must have a diverse framework of therapy and integration in place [...]
Lire la suiteA Psychotherapeutic View on the Therapeutic Effects of Ritual Ayahuasca Use in the Treatment of Addiction Anja LOIZAGA-VELDER MAPS Bulletin Special Edition, Spring 2013, 36-40. Ayahuasca is a traditional plant preparation of the Amazon basin with psychoactive properties. In recent decades ayahuasca has gained the attention of researchers in multiple disciplines worldwide due to its acclaimed therapeutic and spiritual qualities. It is an admixture of two plants : the harmaline containing vine Banisteriopsis caapi, and the DMT-containing leafs from the Psychotria viridis bush. It is typically administered by a trained expert in a ritual context. The use of ayahuasca has spread beyond the Amazon [...]
Lire la suiteAyahuasca-Assisted Therapy for Addiction: Results from a Preliminary Observational Study in Canada Gerald Thomas, Philippe Lucas, N. Rielle Capler, Kenneth W. Tupper and Gina Martin Current Drug Abuse Reviews, 2013, 6, (1), 1-13. Abstract: Introduction : This paper reports results from a preliminary observational study of ayahuasca-assisted treatment for problematic substance use and stress delivered in a rural First Nations community in British Columbia, Canada. Methods : The “Working with Addiction and Stress” retreats combined four days of group counselling with two expert-led ayahuasca ceremonies. This study collected pre-treatment and six months follow-up data from 12 participants on several psychological and behavioral factors related to [...]
Lire la suiteCannabis use, dependence and withdrawal in indigenous male inmates, Bernadette Rogerson et al., 2014
Cannabis use, dependence and withdrawal in indigenous male inmates Bernadette Rogerson, Susan P. Jacups, and Nerina Caltabiano Journal of Substance Use, 2014, 1–7 DOI: 10.3109/14659891.2014.950702 ISSN: 1465-9891 (print), 1475-9942 (electronic) Abstract Background : No studies have investigated cannabis withdrawal in indigenous or incarcerated populations, and there is currently no standard treatment for cannabis withdrawal in Australian prisons. Aims : This cross sectional survey examines cannabis use, dependence and involuntary (abrupt cessation) withdrawal in incarcerated indigenous males for the purpose of improving clinical management. Methods : 101 consenting inmates (18–40 years) from an Australian correction centre were interviewed. Demographic characteristics, lifetime cannabis use (LCU), severity of dependence, cannabis withdrawal [...]
Lire la suiteHeavy Cannabis Use, Dependence and the Brain: A Clinical Perspective KROON E., KUHNS L., HOCH E., COUSIJN J. Addictions, 2019 Aug 13. doi: 10.1111/add.14776. PMID: 31408248 Abstract AIMS : To summarize and evaluate our knowledge of the relationship between heavy cannabis use, Cannabis Use Disorder (CUD), and the brain. METHODS : Narrative review of relevant literature identified through existing systematic reviews, meta-analyses and a PubMed search. Epidemiology, clinical representations, potential causal mechanisms, assessments, treatment and prognosis are discussed. RESULTS : Although causality is unclear, heavy and dependent cannabis use is consistently associated with a high prevalence of comorbid psychiatric disorders and learning and memory impairments that seem [...]
Lire la suiteThe Relevance of Sex in the Association of Synthetic Cannabinoid Use With Psychosis and Agitation in an Inpatient Population Anahita Bassir Nia, MD‡; Claire L. Mann, BA; Sharron Spriggs, MA; Daniel R. DeFrancisco, MD; Steven Carbonaro, MD; Lyla Parvez, MA; Igor I. Galynker, MD, PhD; Charles A. Perkel, MD; and Yasmin L. Hurd, PhD Journal of Clinical Psychiatry, 2019, 80, (4), 18m12539 https://doi.org/10.4088/JCP.18m12539 Background : Current evidence suggests that women are more sensitive to the effects of cannabinoids. The aim of this study was to investigate the relevance of sex in the association of synthetic cannabinoid (SC) use with psychosis and agitation. Methods : A [...]
Lire la suiteMultiple receptors contribute to the behavioral effects of indoleamine hallucinogens Adam L. Halberstadt & Mark A. Geyer Neuropharmacology, 2011, 61, (3), 364–381. doi:10.1016/j.neuropharm.2011.01.017. Abstract Serotonergic hallucinogens produce profound changes in perception, mood, and cognition. These drugs include phenylalkylamines such as mescaline and 2,5-dimethoxy-4-methylamphetamine (DOM), and indoleamines such as (+)-lysergic acid diethylamide (LSD) and psilocybin. Despite their differences in chemical structure, the two classes of hallucinogens produce remarkably similar subjective effects in humans, and induce cross-tolerance. The phenylalkylamine hallucinogens are selective 5-HT2 receptor agonists, whereas the indoleamines are relatively nonselective for serotonin (5-HT) receptors. There is extensive evidence, from both animal and human studies, that the [...]
Lire la suiteLifetime marijuana use in relation to insulin resistance in lean, overweight, and obese US adults Gerard Ngueta, Ruth Ndjaboue Journal of Diabetes, 2019 https://doi.org/10.1111/1753-0407.12958 Abstract Background Obese individuals are more likely to show insulin resistance (IR). However, limited population studies on marijuana use with markers of IR have yielded mixed results. The aim of this study was to examine the association of marijuana use with IR in US adults with different body mass index (BMI) status. Methods Data from the 2009 to 2016 National Health and Nutrition Examination Survey (NHANES) were abstracted. Minimal lifetime marijuana use was estimated using the duration of regular exposure and frequency of use. [...]
Lire la suiteEndocannabinoid signaling in psychiatric disorders: a review of positron emission tomography studies Matthew E. Sloan, Caroline W. Grant, Joshua L. Gowin, Vijay A. Ramchandani and Bernard Le Foll Acta Pharmacologica Sinica, 2018, 0, 1–9; https://doi.org/10.1038/s41401-018-0081-z Endocannabinoid signaling is implicated in an array of psychopathologies ranging from anxiety to psychosis and addiction. In recent years, radiotracers targeting the endocannabinoid system have been used in positron emission tomography (PET) studies to determine whether individuals with psychiatric disorders display altered endocannabinoid signaling. We comprehensively reviewed PET studies examining differences in endocannabinoid signaling between individuals with psychiatric illness and healthy controls. Published studies evaluated individuals with five psychiatric [...]
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