Drug and Alcohol Dependence
August 11, 2023
Teuntje A. D. Pelgrim, Johannes G. Ramaekers, Matthew B. Wall et al.
3 citations
BACKGROUND: Cannabis produces various acute psychotropic effects, with marked individual differences. Cannabis use is a risk factor for developing psychotic disorders. The main component responsible for these effects is Δ9-tetrahydrocannabinol (THC). Here we investigated the neural basis of acute THC effects and its modulation by catechol-methyl-transferase (COMT) Val158Met genotype. METHODS:...
Cannabis and Cannabinoid Research
August 9, 2023
Abhinandan Banerjee, William Hosie, Ana Carolina Terso Ventura et al.
Background: This article highlights the formulation of a solid Δ9-tetrahydrocannabinol (THC)-loaded ingestible prepared from pure THC distillate. Methods: A THC-containing ethanol-assisted cannabinoid nanoemulsion (EACNE) was created using a solvent displacement technique. Subsequently, the EACNE was converted to a solid powdery material while still retaining its THC potency, a format uniquely...
Journal of Addictive Diseases
August 4, 2023
Ruzmayuddin Mamat, Rusdi Abd Rashid, Baharudin Ibrahim et al.
2 citations
Psilocybin in vaping is growing among ATS users and across all populations. Unfortunately, knowledge regarding the long-term effects on health is limited. Further studies should highlight the harmful effects of psilocybin and the potential risk of psilocybin vaping among the younger population.
Neurotoxicology
August 1, 2023
A. Ademosun, O. Ajeigbe, Bodun Oluwaseun Lawrence et al.
Most teenagers mix up various psychoactive cocktail substances in combinations to get intoxicated. The role of the mixture combination of codeine (CDE), tramadol (TMD), and Cannabis sativa (CNB) on brain cognition, purinergic, cholinergic, and antioxidant enzyme activities remains unknown. This study sought to assess the mechanism of action of combinations of CDE+ TMD+ CNB on the function and...
Addiction Biology
August 2023
Constanza Garcia-Keller, Madeline Hohmeister, Kailyn Seidling et al.
Drugs of abuse induce cell type-specific adaptations in D1- and D2-medium spiny neurons (MSNs) in the nucleus accumbens core (NAcore) that can bias signalling towards D1-MSNs and enhance relapse vulnerability. Whether Δ9 -tetrahydrocannabinol (THC) use initiates similar neuroadaptations is unknown. D1- and D2-Cre transgenic rats were transfected with Cre-dependent reporters and trained to...
Frontiers for Young Minds
August 2023
Yasmin L. Hurd, Jacqueline-Marie N Ferland, Yoko Nomura et al.
Although cannabis is a naturally occurring plant with a long history of use by humans, the chemicals it contains, called cannabinoids, can act on the human body in many ways. Use of cannabis during important periods of development, such as during pregnancy and adolescence, can have a long-lasting impact on the way the brain forms and develops its systems to control emotions and other functions....
Psychiatry Research
August 1, 2023
Ricardo E Carrión, Andrea M. Auther, Danielle McLaughlin et al.
Recreational cannabis use has recently gained considerable interest as an environmental risk factor that triggers the onset of psychosis. To date, however, the evidence that cannabis is associated with negative outcomes in individuals at clinical high risk (CHR) for psychosis is inconsistent. The present study tracked cannabis usage over a 2-year period and examined its associations with...
Frontiers in Pharmacology
July 31, 2023
Valentina Castelli, Gianluca Lavanco, Cesare D'Amico et al.
Introduction: An altered neurodevelopmental trajectory associated with prenatal exposure to ∆-9-tetrahydrocannabinol (THC) leads to aberrant cognitive processing through a perturbation in the effectors of hippocampal plasticity in the juvenile offspring. As adolescence presents a unique window of opportunity for "brain reprogramming", we aimed at assessing the role of the non-psychoactive...
Phytotherapy Research
July 31, 2023
Giuseppe Tringali, Gianluca Lavanco, Valentina Castelli et al.
17 citations
Alcohol binge drinking is common among adolescents and may challenge the signalling systems that process affective stimuli, including calcitonin gene-related peptide (CGRP) signalling. Here, we employed a rat model of adolescent binge drinking to evaluate reward-, social- and aversion-related behaviour, glucocorticoid output and CGRP levels in affect-related brain regions. As a potential...
Journal of Psychopharmacology
July 29, 2023
Natalie Ertl, Will Lawn, Claire Mokrysz et al.
17 citations
BACKGROUND/AIM: Cannabis use is highly prevalent in adolescents; however, little is known about its effects on adolescent brain function. METHOD: = 70, 35 adolescents/35 adults). Pre-registered analyses examined the connectivity of seven major cortical and sub-cortical brain networks (default mode network, executive control network (ECN), salience network, hippocampal network and three striatal...
Journal of Cannabis Research
July 26, 2023
Lee Johnson, Marc Malone, Erik R. Paulson et al.
Background Hemp-derived delta-9 tetrahydrocannabinol (∆^9 THC) products are freely available for sale across much of the USA, but the federal legislation allowing their sale places only minimal requirements on companies. Products must contain no more than 0.3% ∆^9 THC by dry weight, but no limit is placed on overall dosage and there is no requirement that products are tested. However, some...
Cannabis and Cannabinoid Research
July 26, 2023
Valentina Lorenzetti, Eugene McTavish, Samantha J Broyd et al.
Introduction: Cannabis use is associated with brain functional changes in regions implicated in prominent neuroscientific theories of addiction. Emerging evidence suggests that cannabidiol (CBD) is neuroprotective and may reverse structural brain changes associated with prolonged heavy cannabis use. In this study, we examine how an ∼10-week exposure of CBD in cannabis users affected...
Frontiers in Neuroscience
July 18, 2023
Guy Shapira, Ifat Israel-Elgali, Meitar Grad et al.
Delta-9-tetrahydrocannabinol (THC) is the primary psychoactive compound of the cannabis plant and an exogenous ligand of the endocannabinoid system. In previous studies, we demonstrated that a single microdose of THC (0.002 mg/kg, 3-4 orders of magnitude lower than the standard dose for rodents) exerts distinct, long-term neuroprotection in model mice subjected to acute neurological insults....
Cannabis and Cannabinoid Research
July 13, 2023
Laurel P Gibson, Angela D Bryan
Background: The use of cannabis with various forms of exercise (e.g., running) has received increased media attention in recent years, contradicting the popular stereotype that cannabis is associated with sedentary behavior. Although cross-sectional evidence suggests a positive association between cannabis use and exercise engagement, to date, the acute effects of cannabis on exercise remain...
Journal of Exploratory Research in Pharmacology
July 12, 2023
Marilyn Helen Silva
1 citation
Cannabis sativa contains phytocannabinoids that are psychoactive and neurotoxic (delta-9-tetrahydrocannabinol: Δ9THC) or nonpsychoactive and presumptively neuroprotective (cannabidiol: CBD). Along with rising legalization, availability, and demand, the Δ9THC:CBD ratio also has increased. Cannabis legalization means that use will likely increase in pregnant or breastfeeding women, affecting all...
Journal of dual diagnosis
July 3, 2023
Benedikt Fischer, W. Hall, T. Fidalgo et al.
Abstract Objective: Cannabis use is increasingly normalized; psychosis is a major adverse health outcome. We reviewed evidence on cannabis use-related risk factors for psychosis outcomes at different stages toward recommendations for risk reduction by individuals involved in cannabis use. Methods: We searched primary databases for pertinent literature/data 2016 onward, principally relying on...
Drug and Alcohol Review
July 2023
Jesse Lineham, Elle Wadsworth, David Hammond
Few studies have examined consumer knowledge and communication of tetrahydrocannabinol (THC) content among cannabis consumers, including potential differences by cannabis legislation. The study sought to: (i) examine self-reported knowledge of THC content across 10 cannabis products; (ii) examine self-reported intoxication levels; and (iii) examine association between self-reported THC levels...
Biological Psychiatry Global Open Science
July 2023
Ahmed Hasbi, Bertha K. Madras, Susan R George
Frequent cannabis use is associated with a higher risk of developing cannabis use disorder and other adverse consequences. However, rodent models studying the underlying mechanisms of the reinforcing and withdrawal effects of the primary constituent of cannabis, Δ9-tetrahydrocannabinol (THC), have been limited. This study investigated the effects of daily THC (1 mg/kg, intraperitoneal, 9 days)...
Cureus
July 1, 2023
Martin Leczycki, P. Zaki, Eduardo D. Espiridion
“Moon rock” cannabis is a type of new and highly potent preparation of cannabis, which is made of a strain of cannabis dipped in hash oil and sprinkled with kief crystals, effectively increasing the concentration of δ-9-tetrahydrocannabinol (THC), the main psychoactive compound in cannabis, well beyond what is naturally found in the cannabis plant. The use of increasingly potent forms of...
Movement Disorders
July 2023
Christopher H Domen, Stefan Sillau, Ying Liu et al.
Cannabis is increasingly available worldwide but its impact on cognition in Parkinson's disease (PD) is unknown. Present cognitive safety data from study of an oral high-dose cannabidiol (CBD; 100 mg) and low-dose Δ9-tetrahydocannabinol (THC; 3.3 mg) drug in PD. Randomized, double-blind, parallel-group, placebo-controlled study of a CBD/THC drug administered for 16.3 (SD: 4.2) days, with dosage...