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https://www.readbyqxmd.com/read/29684910/forensic-applications-of-supercritical-fluid-chromatography-mass-spectrometry
#1
REVIEW
Volodymyr Pauk, Karel Lemr
Achievements of supercritical fluid chromatography with mass spectrometric detection made in the field of forensic science during the last decade are reviewed. The main topics include analysis of traditional drugs of abuse (e.g. cannabis, methamphetamine) as well as new psychoactive substances (synthetic cannabinoids, cathinones and phenethylamines), doping agents (anabolic steroids, stimulants, diuretics, analgesics etc.) and chemical warfare agents. Control of food authenticity, detection of adulteration and identification of toxic substances in food are also pointed out...
April 11, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29682077/intracerebral-hemorrhage-with-multiple-intracranial-arterial-stenoses-in-a-synthetic-cannabinoid-spice-user
#2
Seckin Aydin, Odhan Yuksel, Aysegul Esen Aydin, Osman Kizilkilic, Suat Erol Celik
Synthetic cannabinoids (spice), which are used frequently worldwide, are more potent than herbal compounds and also have more side effects in comparison. A 23-year-old male was admitted to the emergency unit with altered consciousness. There was no sign of trauma, and his medical history did not reveal any chronic illness. Computed tomography revealed a large frontal hematoma extending to the ventricular system. The outcomes of cerebral angiography were consistent with multiple intracranial arterial stenoses (MIAS) which can also be seen after cannabis usage...
April 2018: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/29681284/alkylsilyl-speciation-and-direct-sample-preparation-of-plant-cannabinoids-prior-to-their-analysis-by-gc-ms
#3
Blanka Fodor, Imre Boldizsár, Ibolya Molnár-Perl
A literature criticism is given on methods currently using gas chromatography mass spectrometry (GC-MS) to determine plant cannabinoids (p-CBDs). In this study, trialkylsilylation of seven p-CBDs (including their transformation products formed in the drug user's body) was compared applying various alkylsilyl reagents1 and the mass fragmentation properties of the corresponding derivatives were characterized. Derivatization, mass fragmentation and quantitation related model investigations were optimized as a function of the reaction times and conditions...
August 27, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29678279/the-psychiatric-consequences-of-cannabinoids
#4
Joao P De Aquino, Mohamed Sherif, Rajiv Radhakrishnan, John D Cahill, Mohini Ranganathan, Deepak C D'Souza
With rising rates of cannabis use in the general population and an increasing number of US states legalizing both recreational and medical cannabis use, it is important to be informed about the adverse consequences of cannabinoids. This Commentary provides an overview of the psychiatric effects of plant-based and synthetic cannabinoids, differentiating acute effects from effects associated with persistent use. Cannabinoids produce multiphasic and dose-dependent effects on anxiety, mood, and perception, in addition to impairing cognition and psychomotor function...
April 17, 2018: Clinical Therapeutics
https://www.readbyqxmd.com/read/29670357/dronabinol-oral-solution-in-the-management-of-anorexia-and-weight-loss-in-aids-and-cancer
#5
REVIEW
Melissa E Badowski, Paa Kwesi Yanful
The true incidence of anorexia secondary to human immunodeficiency virus (HIV)/acquired immunodeficiency syndrome (AIDS) and cancer is not well classified owing to the fact that there is a lack of standardized definitions and recent clinical data in these settings. Dronabinol, or Δ-9-tetrahydrocannabinol, is a synthetic molecule that closely mimics the action of Cannabis sativa L., a naturally occurring compound activated in the central nervous system by cannabinoid receptors. Dronabinol exerts its effects by directly acting on the vomiting and appetite control centers in the brain, which in turn increases appetite and prevents vomiting...
2018: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/29651709/-cannabinoid-therapy-in-practice
#6
REVIEW
T Rasche, D Emmert, C Stieber, M Mücke, R Conrad
BACKGROUND: In recent years, the media and scientists have shown increased interest in cannabis-based drugs. OBJECTIVES: Background information about cannabis-based drugs and their mechanism of action as well as discussion of possible applications as supportive therapy or in palliative medicine, respectively, are presented. MATERIALS AND METHODS: The recent literature was examined and evaluated. RESULTS: In many medical fields, we do not have sufficient evidence for the efficacy of cannabinoids...
April 12, 2018: Der Urologe. Ausg. A
https://www.readbyqxmd.com/read/29648861/an-assessment-of-concurrent-cannabidiol-and-%C3%AE-%C3%A2-tetrahydrocannabinol-administration-in-place-aversion-and-taste-avoidance-conditioning
#7
Briana J Hempel, Matthew M Clasen, Katharine H Nelson, Claudia J Woloshchuk, Anthony L Riley
Rising interest in medical marijuana has prompted research into its phytocannabinoid constituents, particularly Δ⁹-tetrahydrocannabinol (THC) and cannabidiol (CBD). Coadministration of CBD with THC has been shown to modulate a number of THC's effects, including its negative stimulus properties (e.g., anxiety, paranoia, psychosis) in a clinical setting. The present series of experiments extended these analyses by examining the ability of CBD to impact the aversive effects of THC as assessed in a combined taste and place conditioning procedure...
April 2018: Experimental and Clinical Psychopharmacology
https://www.readbyqxmd.com/read/29624642/cannabidiol-regulates-behavioural-alterations-and-gene-expression-changes-induced-by-spontaneous-cannabinoid-withdrawal
#8
Francisco Navarrete, Auxiliadora Aracil-Fernández, Jorge Manzanares
BACKGROUND AND PURPOSE: Cannabidiol (CBD) represents a promising therapeutic tool for treating cannabis use disorder (CUD). This study aimed to evaluate the effects of CBD on the behavioural and gene expression alterations induced by spontaneous cannabinoid withdrawal. EXPERIMENTAL APPROACH: Spontaneous cannabinoid withdrawal was evaluated 12 h after cessation of CP-55,940 treatment (0.5 mg·kg-1 /12 h; intraperitoneally (i.p.); 7 days) in C57BL/6J mice. The effects of CBD (5, 10 and 20 mg·kg-1 ; i...
April 6, 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29619743/subcellular-localization-defines-modification-and-production-of-%C3%AE-9-tetrahydrocannabinolic-acid-synthase-in-transiently-transformed-nicotiana-benthamiana
#9
Marcus Geissler, Jascha Volk, Felix Stehle, Oliver Kayser, Heribert Warzecha
OBJECTIVE: Through heterologous expression of the tetrahydrocannabinolic acid synthase (THCAS) coding sequence from Cannabis sativa L. in Nicotiana benthamiana, we evaluated a transient plant-based expression system for the production of enzymes involved in cannabinoid biosynthesis. RESULTS: Thcas was modularized according to the GoldenBraid grammar and its expression tested upon alternative subcellular localization of the encoded catalyst with and without fusion to a fluorescent protein...
April 4, 2018: Biotechnology Letters
https://www.readbyqxmd.com/read/29609727/medical-cannabis-and-the-treatment-of-obstructive-sleep-apnea-an-american-academy-of-sleep-medicine-position-statement
#10
Kannan Ramar, Ilene M Rosen, Douglas B Kirsch, Ronald D Chervin, Kelly A Carden, R Nisha Aurora, David A Kristo, Raman K Malhotra, Jennifer L Martin, Eric J Olson, Carol L Rosen, James A Rowley
The diagnosis and effective treatment of obstructive sleep apnea (OSA) in adults is an urgent health priority. Positive airway pressure (PAP) therapy remains the most effective treatment for OSA, although other treatment options continue to be explored. Limited evidence citing small pilot or proof of concept studies suggest that the synthetic medical cannabis extract dronabinol may improve respiratory stability and provide benefit to treat OSA. However, side effects such as somnolence related to treatment were reported in most patients, and the long-term effects on other sleep quality measures, tolerability, and safety are still unknown...
March 30, 2018: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/29607411/verbal-memory-performance-and-reduced-cortical-thickness-of-brain-regions-along-the-uncinate-fasciculus-in-young-adult-cannabis-users
#11
Nina Levar, Alan N Francis, Matthew J Smith, Wilson C Ho, Jodi M Gilman
Introduction: Memory impairment is one of the most commonly reported effects of cannabis use, especially among those who initiate use earlier, perhaps due to the effects of delta-9- tetrahydrocannabinol on cannabinoid (CB1) receptors in the brain. Studies have increasingly investigated whether cannabis use is associated with impairments in verbal memory, and with alterations in brain structures underlying verbal memory. The uncinate fasciculus (UF), a long-range white matter tract, connects regions with densely localized CB1 receptors that are important in verbal memory...
2018: Cannabis and Cannabinoid Research
https://www.readbyqxmd.com/read/29607409/a-novel-observational-method-for-assessing-acute-responses-to-cannabis-preliminary-validation-using-legal-market-strains
#12
L Cinnamon Bidwell, Raeghan Mueller, Sophie L YorkWilliams, Sarah Hagerty, Angela D Bryan, Kent E Hutchison
Background: The development of novel cannabis research methods that are compatible with current federal regulations is imperative to conduct studies of the effects of legal market cannabis. There is very little research on higher strength, higher Δ9-tetrahydrocannabinol (THC), which has become increasingly available since legalization. Research on strains containing cannabidiol (CBD), a second primary, but nonpsychotomimetic, cannabinoid, is very limited. Materials and Methods: Using a novel observational methodology, regular cannabis users were asked to use one of two legal market cannabis strains that they purchased from a local dispensary (one strain containing 8% THC and 16% CBD (THC+CBD) and one containing a 17% THC concentration, but no CBD (THC)...
2018: Cannabis and Cannabinoid Research
https://www.readbyqxmd.com/read/29604295/cannabinoid-receptor-mediated-disruption-of-sensory-gating-and-neural-oscillations-a-translational-study-in-rats-and-humans
#13
Patrick D Skosnik, Mihály Hajós, Jose A Cortes-Briones, Chad R Edwards, Brian P Pittman, William E Hoffmann, Andrew R Sewell, Deepak C D'Souza, Mohini Ranganathan
Cannabis use has been associated with altered sensory gating and neural oscillations. However, it is unclear which constituent in cannabis is responsible for these effects, or whether these are cannabinoid receptor 1 (CB1R) mediated. Therefore, the present study in humans and rats examined whether cannabinoid administration would disrupt sensory gating and evoked oscillations utilizing electroencephalography (EEG) and local field potentials (LFPs), respectively. Human subjects (n = 15) completed four test days during which they received intravenous delta-9-tetrahydrocannabinol (Δ9 -THC), cannabidiol (CBD), Δ9 -THC + CBD, or placebo...
March 28, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29602148/delta-9-tetrahydrocannabinolic-acid-a-thc-a-in-urine-of-a-15-month-old-child-a-case-report
#14
Luca Morini, Jessica Quaiotti, Matteo Moretti, Antonio Marco Maria Osculati, Luca Tajana, Angelo Groppi, Claudia Vignali
INTRODUCTION: The acidic forms of cannabinoids, THC-A and CBD-A are naturally present in cannabis plants and preparations and are generally decarboxylated to the active compounds before the use (e.g. thermally decarboxylated through smoking). Hence, the identification of the acidic compounds in urine could be an evidence of cannabis ingestion rather than a passive exposure to smoke. This case report described a 15-month-old child that suffered an acute intoxication by accidental cannabis ingestion...
May 2018: Forensic Science International
https://www.readbyqxmd.com/read/29602054/a-novel-single-step-gc-ms-ms-method-for-cannabinoids-and-11-oh-thc-metabolite-analysis-in-hair
#15
Ilaria Angeli, Sara Casati, Alessandro Ravelli, Mauro Minoli, Marica Orioli
THC, CBD, CBN, THC-COOH and 11-OH-THC are the most popular markers of cannabis consumption and abuse. The use of this drug is a serious social problem worldwide. In this study, a method based on gas chromatography-tandem mass spectrometry (GC-MS/MS) operated in electron ionization (EI) with simple and rapid liquid-liquid extraction (LLE) and derivatization was developed and validated for the simultaneous determination of THC, CBD, CBN and 11-OH-THC in hair samples. The detection of all compounds was based on multiple reaction monitoring (MRM) transitions...
March 16, 2018: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29601658/chromatographic-characterisation-of-11-phytocannabinoids-quantitative-and-fit-to-purpose-performance-as-a-function-of-extra-column-variance
#16
Matthew Noestheden, Gareth Friedlander, Jason Anspach, Scott Krepich, K C Hyland, Wesley F Zandberg
INTRODUCTION: Cannabis sativa L. (cannabis) is utilised as a therapeutic and recreational drug. With the legalisation of cannabis in many countries and the anticipated regulation of potency that will accompany legalisation, analytical testing facilities will require a broadly applicable, quantitative, high throughput method to meet increased demand. Current analytical methods for the biologically active components of cannabis (phytocannabinoids) suffer from low throughput and/or an incomplete complement of relevant phytocannabinoids...
March 30, 2018: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/29601300/cannabinoids-in-health-and-disease-pharmacological-potential-in-metabolic-syndrome-and-neuroinflammation
#17
REVIEW
Andrea Mastinu, Marika Premoli, Giulia Ferrari-Toninelli, Simone Tambaro, Giuseppina Maccarinelli, Maurizio Memo, Sara Anna Bonini
The use of different natural and/or synthetic preparations of Cannabis sativa is associated with therapeutic strategies for many diseases. Indeed, thanks to the widespread diffusion of the cannabinoidergic system in the brain and in the peripheral districts, its stimulation, or inhibition, regulates many pathophysiological phenomena. In particular, central activation of the cannabinoidergic system modulates the limbic and mesolimbic response which leads to food craving. Moreover, cannabinoid agonists are able to reduce inflammatory response...
March 30, 2018: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/29593494/antiepileptogenic-effect-of-subchronic-palmitoylethanolamide-treatment-in-a-mouse-model-of-acute-epilepsy
#18
Julia M Post, Sebastian Loch, Raissa Lerner, Floortje Remmers, Ermelinda Lomazzo, Beat Lutz, Laura Bindila
Research on the antiepileptic effects of (endo-)cannabinoids has remarkably progressed in the years following the discovery of fundamental role of the endocannabinoid (eCB) system in controlling neural excitability. Moreover, an increasing number of well-documented cases of epilepsy patients exhibiting multi-drug resistance report beneficial effects of cannabis use. Pre-clinical and clinical research has increasingly focused on the antiepileptic effectiveness of exogenous administration of cannabinoids and/or pharmacologically induced increase of eCBs such as anandamide (also known as arachidonoylethanolamide [AEA])...
2018: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29582946/-effects-of-cannabis-extract-premedication-on-anesthetic-depth
#19
Carlos Ibera, Ben Shalom, Fayez Saifi, Joshua Shruder, Elyad Davidson
BACKGROUND: Cannabis is the most widely used illicit drug in the world, used by approximately 2.7-4.9% of the world's population, and 7.6-10.2% of Israel's adults. During the past few years, legal systems around the world have enacted large scale adoption of the legalization of both medical and recreational cannabis. Anesthetists should therefore be prepared to treat patients who used cannabis and are undergoing elective or emergency operations. However, the interactions between cannabinoids and general anesthetic agents and the possible implications for patient care are not yet fully understood...
March 2018: Harefuah
https://www.readbyqxmd.com/read/29574668/cannabidiol-reverses-deficits-in-hippocampal-ltp-in-a-model-of-alzheimer-s-disease
#20
Blathnaid Hughes, Caroline E Herron
Here we demonstrate for the first time that cannabidiol (CBD) acts to protect synaptic plasticity in an in vitro model of Alzheimer's disease (AD). The non-psycho active component of Cannabis sativa, CBD has previously been shown to protect against the neurotoxic effects of beta amyloid peptide (Aβ) in cell culture and cognitive behavioural models of neurodegeneration. Hippocampal long-term potentiation (LTP) is an activity dependent increase in synaptic efficacy often used to study cellular mechanisms related to memory...
March 24, 2018: Neurochemical Research
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