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https://www.readbyqxmd.com/read/27899885/interacting-cannabinoid-and-opioid-receptors-in-the-nucleus-accumbens-core-control-adolescent-social-play
#1
Antonia Manduca, Olivier Lassalle, Marja Sepers, Patrizia Campolongo, Vincenzo Cuomo, Giovanni Marsicano, Brigitte Kieffer, Louk J M J Vanderschuren, Viviana Trezza, Olivier J J Manzoni
Social play behavior is a highly rewarding, developmentally important form of social interaction in young mammals. However, its neurobiological underpinnings remain incompletely understood. Previous work has suggested that opioid and endocannabinoid neurotransmission interact in the modulation of social play. Therefore, we combined behavioral, pharmacological, electrophysiological, and genetic approaches to elucidate the role of the endocannabinoid 2-arachidonoylglycerol (2-AG) in social play, and how cannabinoid and opioid neurotransmission interact to control social behavior in adolescent rodents...
2016: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/27898071/are-adolescents-more-vulnerable-to-the-harmful-effects-of-cannabis-than-adults-a-placebo-controlled-study-in-human-males
#2
C Mokrysz, T P Freeman, S Korkki, K Griffiths, H V Curran
Preclinical research demonstrates that cannabinoids have differing effects in adolescent and adult animals. Whether these findings translate to humans has not yet been investigated. Here we believe we conducted the first study to compare the acute effects of cannabis in human adolescent (n=20; 16-17 years old) and adult (n=20; 24-28 years old) male cannabis users, in a placebo-controlled, double-blind cross-over design. After inhaling vaporized active or placebo cannabis, participants completed tasks assessing spatial working memory, episodic memory and response inhibition, alongside measures of blood pressure and heart rate, psychotomimetic symptoms and subjective drug effects (for example, 'stoned', 'want to have cannabis')...
November 29, 2016: Translational Psychiatry
https://www.readbyqxmd.com/read/27889374/-consumption-of-cannabis-in-adolescents
#3
O Phan, I Obradovic, A Har
Over the past 10 years, the consumption of cannabis among adolescents has dramatically increased. Today, adolescent cannabis use is a major public health problem. Two forms of cannabis are commonly smoked: herb (marijuana) and resin. These forms have a high concentration of tetrahydrocannabinol, the active molecule of cannabis. Recent research has helped understand how the cannabinoid system works. This system combines specific receptors and specific molecules: the endocannabinoids. The effects of cannabis use are now well documented...
November 23, 2016: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/27824312/anti-n-methyl-d-aspartate-receptor-encephalitis-and-drug-abuse-the-probable-role-of-molecular-mimicry-or-the-overstimulation-of-cb-receptors-in-a-17-year-old-adolescent-case-report
#4
Lidia Hau, Gyorgyi Csabi, Barnabas Rozsai, Jozsef Stankovics, Tamas Tenyi, Katalin Hollody
Anti-N-methyl-D-aspartate encephalitis is an autoimmune disorder characterized by autoantibodies produced against NMDA receptors. We report the case of a 17-year-old drug user teenager who presented with altered mental scale, psychiatric symptoms and autonomic dysfunction. In the background we diagnosed NMDA encephalitis. We supposed that synthetic cannabinoids/drugs may have lead to the of trigger NMDA encephalitis via the altered activation of the immune system and molecular mimicry mechanism.
September 2016: Neuropsychopharmacologia Hungarica
https://www.readbyqxmd.com/read/27789118/adverse-structural-and-functional-effects-of-marijuana-on-the-brain-evidence-reviewed
#5
REVIEW
David E Mandelbaum, Suzanne M de la Monte
The growing use and legalization of cannabis are leading to increased exposures across all age groups, including in adolescence. The touting of its medicinal values stems from anecdotal reports related to treatment of a broad range of illnesses including epilepsy, multiple sclerosis, muscle spasms, arthritis, obesity, cancer, Alzheimer disease, Parkinson disease, post-traumatic stress, inflammatory bowel disease, and anxiety. However, it is essential that anecdotal data and the high level of interest in this treatment not obscure objective assessments of any potential and realized short- and long-term adverse effects of cannabis, particularly with respect to age of onset and chronicity of exposure...
September 13, 2016: Pediatric Neurology
https://www.readbyqxmd.com/read/27777807/synthetic-cannabis-overdose-and-withdrawal-in-a-young-adult-a-case-report-commentary-on-regulation-and-review-of-the-literature
#6
John Samaan, Gerardo F Ferrer, Boye Akinyemi, Patricia Junquera, Juan Oms, Rhaisa Dumenigo
Introduction. Marijuana has been used for its psychotropic effects including enhanced relaxation and perceptual alterations. However, the use of synthetic marijuana (SM) leads to more frequent and drastic side effects than the typical use of regular marijuana, owing to the fact that SM has a shorter duration and an earlier peak of action. Despite all the potential adverse health effects associated with SM use, current health policies on SM are very limited. It is believed that the popularity of SM has increased, due to its easy accessibility in the US and lack of detection in typical urine drug screens for THC...
2016: Case Reports in Psychiatry
https://www.readbyqxmd.com/read/27776623/evidence-based-treatment-options-in-cannabis-dependency
#7
Lisa Walther, Andreas Gantner, Andreas Heinz, Tomislav Majić
BACKGROUND: Now that the consumption of natural and synthetic cannabinoids is becoming more widespread, the specific treatment of cannabis-related disturbances is an increasingly important matter. There are many therapeutic options, and it is not always clear which ones are evidence-based and appropriate for use in a given clinical situation. METHODS: This review is based on reports of pertinent randomized and controlled trials (RCTs) that were retrieved by a selective search in the PubMed and Cochrane databases...
September 30, 2016: Deutsches Ärzteblatt International
https://www.readbyqxmd.com/read/27749024/-just-one-bad-high-considering-synthetic-cannabinoid-outcome-expectancies-in-adolescents
#8
David S Mathai, Christopher D Verrico, Daryl Shorter, John H Coverdale, Thomas R Kosten
BACKGROUND/OBJECTIVES: Certain medical consequences seem unique to synthetic cannabinoid (SC) and not cannabis use. We report the case of an adolescent, whose drug expectancies appear to minimize the severity of SC-related adverse events. METHODS/RESULTS: An 18-year-old male presented with altered mental status and seizure, complicated by respiratory failure. He was stabilized and on discharge, despite counseling on the harms of SC usage, the patient planned to resume use, insisting that the hospitalization was "just one bad high"...
October 17, 2016: American Journal on Addictions
https://www.readbyqxmd.com/read/27720453/-new-patterns-of-substance-use-and-abuse-among-french-adolescents-a-knowledge-synthesis
#9
G Jeanne, D Purper-Ouakil, H Rigole, N Franc
AIM: There have been significant changes in adolescent consumption habits over the past fifteen years. New molecules have been synthesized, new devices created and a number of products have increased in popularity; and as a result clinicians sometimes lack information. We chose to focus on this population because of its vulnerability, as adolescents show low sensitivity to long-term outcomes of their actions and may be easily influenced by peers as regards experimentation of new drugs...
October 6, 2016: L'Encéphale
https://www.readbyqxmd.com/read/27717258/traditional-marijuana-high-potency-cannabis-and-synthetic-cannabinoids-increasing-risk-for-psychosis
#10
Robin M Murray, Harriet Quigley, Diego Quattrone, Amir Englund, Marta Di Forti
Epidemiological evidence demonstrates that cannabis use is associated with an increased risk of psychotic outcomes, and confirms a dose-response relationship between the level of use and the risk of later psychosis. High-potency cannabis and synthetic cannabinoids carry the greatest risk. Experimental administration of tetrahydrocannabinol, the active ingredient of cannabis, induces transient psychosis in normal subjects, but this effect can be ameliorated by co-administration of cannabidiol. This latter is a constituent of traditional hashish, but is largely absent from modern high-potency forms of cannabis...
October 2016: World Psychiatry: Official Journal of the World Psychiatric Association (WPA)
https://www.readbyqxmd.com/read/27715709/acute-effects-of-synthetic-cannabinoids-update-2015
#11
Juliana Tournebize, Valérie Gibaja, Jean-Pierre Kahn
BACKGROUND: Cannabis is the most widely used illicit drug in the United States and Europe. In recent years, a range of new substances with cannabis-like effects-known as synthetic cannabinoids (SCs)-have suddenly burst on the drug scene. However, there is limited information about the clinical hazards linked to the use of these emerging substances. This review summarizes the literature to date relating the health effects of SCs. METHOD: A systematic literature review of original case studies was performed using PubMed and Web of Science (January 1980-July 2015)...
August 11, 2016: Substance Abuse
https://www.readbyqxmd.com/read/27676443/targeting-anandamide-metabolism-rescues-core-and-associated-autistic-like-symptoms-in-rats-prenatally-exposed-to-valproic-acid
#12
M Servadio, F Melancia, A Manduca, A di Masi, S Schiavi, V Cartocci, V Pallottini, P Campolongo, P Ascenzi, V Trezza
Autism spectrum disorders (ASD) are characterized by altered sociability, compromised communication and stereotyped/repetitive behaviors, for which no specific treatments are currently available. Prenatal exposure to valproic acid (VPA) is a known, although still underestimated, environmental risk factor for ASD. Altered endocannabinoid activity has been observed in autistic patients, and endocannabinoids are known to modulate behavioral traits that are typically affected in ASD. On this basis, we tested the hypothesis that changes in the endocannabinoid tone contribute to the altered phenotype induced by prenatal VPA exposure in rats, with focus on behavioral features that resemble the core and associated symptoms of ASD...
2016: Translational Psychiatry
https://www.readbyqxmd.com/read/27662369/effects-of-adolescent-intermittent-alcohol-exposure-on-the-expression-of-endocannabinoid-signaling-related-proteins-in-the-spleen-of-young-adult-rats
#13
Francisco Javier Pavón, Eva María Marco, Mariam Vázquez, Laura Sánchez, Patricia Rivera, Ana Gavito, Virginia Mela, Francisco Alén, Juan Decara, Juan Suárez, Elena Giné, José Antonio López-Moreno, Julie Chowen, Fernando Rodríguez-de-Fonseca, Antonia Serrano, María Paz Viveros
Intermittent alcohol exposure is a common pattern of alcohol consumption among adolescents and alcohol is known to modulate the expression of the endocannabinoid system (ECS), which is involved in metabolism and inflammation. However, it is unknown whether this pattern may have short-term consequences on the ECS in the spleen. To address this question, we examined the plasma concentrations of metabolic and inflammatory signals and the splenic ECS in early adult rats exposed to alcohol during adolescence. A 4-day drinking in the dark (DID) procedure for 4 weeks was used as a model of intermittent forced-alcohol administration (20%, v/v) in female and male Wistar rats, which were sacrificed 2 weeks after the last DID session...
2016: PloS One
https://www.readbyqxmd.com/read/27617779/abnormal-white-matter-integrity-in-synthetic-cannabinoid-users
#14
Nabi Zorlu, Maria Angelique Di Biase, Çiğdem Çolak Kalaycı, Andrew Zalesky, Başak Bağcı, Nihan Oğuz, Fazıl Gelal, Lütfullah Beşiroğlu, Şeref Gülseren, Aybala Sarıçiçek, Emre Bora, Christos Pantelis
Synthetic cannabinoids have become increasingly popular in the last few years especially among adolescents and young adults. However, no previous studies have assessed the effects of synthetic cannabinoids on the structure of the human brain. Understanding the harms of synthetic cannabinoid use on brain structure is therefore crucial given its increasing use. Diffusion tensor imaging (DTI) was performed in 22 patients who used synthetic cannabinoids more than five times a week for at least 1 year and 18 healthy controls...
September 8, 2016: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/27587205/a-narrative-review-of-psychological-cannabis-use-treatments-with-and-without-pharmaceutical-adjunct
#15
Jan Copeland, Peter Gates, Izabella Pokorski
BACKGROUND: As policy responses to cannabis use and availability change internationally, levels of cannabis use disorder rise and treatment seeking increases. Diversion to cannabis treatment from the criminal justice system also increases demand in the system. At a time of developing treatment systems in response to this demand, an understanding of the evidence is increasingly important. OBJECTIVE: To provide a narrative review of the developing evidence-base for psycho-social interventions for cannabis use disorder, including adjunctive cannabinoid agonist therapy...
August 30, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27582345/effects-of-adolescent-cannabinoid-self-administration-in-rats-on-addiction-related-behaviors-and-working-memory
#16
Erin K Kirschmann, Michael W Pollock, Vidhya Nagarajan, Mary M Torregrossa
Use of marijuana (Cannabis sativa) often begins in adolescence, and heavy adolescent marijuana use is often associated with impaired cognitive function in adulthood. However, clinical reports of long-lasting cognitive deficits, particularly in subjects who discontinue use in adulthood, are mixed. Moreover, dissociating innate differences in cognitive function from cannabis-induced deficits is challenging. Therefore, the current study sought to develop a rodent model of adolescent cannabinoid self-administration (SA), using the synthetic cannabinoid receptor agonist WIN55,212-2 (WIN), in order to assess measures of relapse/reinstatement of drug seeking and long-term effects on cognitive function assessed in a delay-match-to-sample working memory task and a spatial recognition task...
October 5, 2016: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/27578457/chronic-exposure-to-cannabinoids-during-adolescence-causes-long-lasting-behavioral-deficits-in-adult-mice
#17
J Tomas-Roig, E Benito, R C Agis-Balboa, F Piscitelli, S Hoyer-Fender, V Di Marzo, U Havemann-Reinecke
Regular use of marijuana during adolescence enhances the risk of long-lasting neurobiological changes in adulthood. The present study was aimed at assessing the effect of long-term administration of the synthetic cannabinoid WIN55212.2 during adolescence in young adult mice. Adolescent mice aged 5 weeks were subjected daily to the pharmacological action of WIN55212.2 for 3 weeks and were then left undisturbed in their home cage for a 5-week period and finally evaluated by behavioral testing. Mice that received the drug during adolescence showed memory impairment in the Morris water maze, as well as a dose-dependent memory impairment in fear conditioning...
August 31, 2016: Addiction Biology
https://www.readbyqxmd.com/read/27569586/endocannabinoids-in-brain-plasticity-cortical-maturation-hpa-axis-function-and-behavior
#18
Diana Dow-Edwards, Lindsay Silva
Marijuana use during adolescence has reached virtually every strata of society. The general population has the perception that marijuana use is safe for mature people and therefore is also safe for developing adolescents. However, both clinical and preclinical research shows that marijuana use, particularly prior to age 16, could have long-term effects on cognition, anxiety and stress-related behaviors, mood disorders and substance abuse. These effects derive from the role of the endocannabinoid system, the endogenous cannabinoid system, in the development of cortex, amygdala, hippocampus and hypothalamus during adolescence...
August 26, 2016: Brain Research
https://www.readbyqxmd.com/read/27568729/cannabinoids-and-psychosis
#19
Deepak Cyril D Souza, Rajiv Radhakrishnan, Mohamed Sherif, Jose Cortes-Briones, John Cahill, Swapnil Gupta, Patrick D Skosnik, Mohini Ranganathan
There is growing interest in the relationship between cannabis and psychosis. The link between cannabis use and psychosis comprises three distinct relationships: acute psychosis associated with cannabis intoxication, acute psychosis that lasts beyond the period of acute intoxication, and persistent psychosis not time-locked to exposure. Experimental studies reveal that cannabis, tetrahydrocannabinol (THC) and synthetic cannabinoids reliably produce transient positive, negative, and cognitive symptoms in healthy volunteers...
August 26, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27547455/corrigendum-to-effects-of-cannabinoid-exposure-during-adolescence-on-the-conditioned-rewarding-effects-of-win-55212-2-and-cocaine-in-mice-influence-of-the-novelty-seeking-trait
#20
M Rodríguez-Arias, C Roger-Sánchez, I Villanova, N Revert, C Manzanedo, J Miñarro, M A Aguilar
[This corrects the article DOI: 10.1155/2016/6481862.].
2016: Neural Plasticity
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