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Chelsea R Kasten, Yanping Zhang, Ken Mackie, Stephen L Boehm
Cannabis use is linked to positive and negative outcomes. Identifying genetic targets of susceptibility to the negative effects of cannabinoid use is of growing importance. The current study sought to complete short-term selective breeding for adolescent sensitivity and resistance to the locomotor effects of a single 10 mg/kg THC dose in the open field. Selection for THC-locomotor sensitivity was moderately heritable, with the greatest estimates of heritability seen in females from the F2 to S3 generations...
March 17, 2018: Behavior Genetics
Thomas F Gamage, Charlotte E Farquhar, Timothy W Lefever, Julie A Marusich, Richard C Kevin, Iain S McGregor, Jenny L Wiley, Brian F Thomas
Synthetic cannabinoids are a class of novel psychoactive substances that exhibit high affinity at the cannabinoid type-1 (CB1) receptor and produce effects similar to those of THC, the primary psychoactive constituent of cannabis. Illicit drug manufacturers are continually circumventing laws banning the sale of synthetic cannabinoids by synthesizing novel structures and doing so with little regard for their potential impact on pharmacological and toxicological effects. Synthetic cannabinoids produce a wide range of effects including cardiotoxicity, seizure activity, and kidney damage and can result in death...
March 16, 2018: Journal of Pharmacology and Experimental Therapeutics
Nick Jikomes, Michael Zoorob
The majority of adults in the U.S. now have state-legal access to medical or recreational cannabis products, despite their federal prohibition. Given the wide array of pharmacologically active compounds in these products, it is essential that their biochemical profile is measured and reported to consumers, which requires accurate laboratory testing. However, no universal standards for laboratory testing protocols currently exist, and there is controversy as to whether all reported results are legitimate. To investigate these concerns, we analyzed a publicly available seed-to-sale traceability dataset from Washington state containing measurements of the cannabinoid content of legal cannabis products from state-certified laboratories...
March 14, 2018: Scientific Reports
Sebastian T Tong, Camille J Hochheimer, Wendy B Barr, Matteo Leveroni-Calvi, Nicholas M Lefevre, Jordyn T Wallenborn, Lars E Peterson
BACKGROUND AND OBJECTIVES: Prior research found that 24% of graduating family medicine residents intend to provide obstetrical deliveries, but only 9% of family physicians 1 to 10 years into practice are doing so. Our study aims to describe the individual and residency program characteristics associated with intention to provide obstetrical deliveries and prenatal care. METHODS: Cross-sectional data on 2014-2016 graduating residents were obtained from the American Board of Family Medicine certification examination demographic questionnaire that asked about intended provision of specific clinical activities...
March 8, 2018: Family Medicine
Martin Mücke, Tudor Phillips, Lukas Radbruch, Frank Petzke, Winfried Häuser
BACKGROUND: This review is one of a series on drugs used to treat chronic neuropathic pain. Estimates of the population prevalence of chronic pain with neuropathic components range between 6% and 10%. Current pharmacological treatment options for neuropathic pain afford substantial benefit for only a few people, often with adverse effects that outweigh the benefits. There is a need to explore other treatment options, with different mechanisms of action for treatment of conditions with chronic neuropathic pain...
March 7, 2018: Cochrane Database of Systematic Reviews
Sagnik Bhattacharyya, Thomas Sainsbury, Paul Allen, Chiara Nosarti, Zerrin Atakan, Vincent Giampietro, Michael Brammer, P K McGuire
BACKGROUND: Cannabis and its main psychoactive ingredient δ-9-tetrahydrocannibidiol (THC) can induce transient psychotic symptoms in healthy individuals and exacerbate them in those with established psychosis. However, not everyone experience these effects, suggesting that certain individuals are particularly susceptible. The neural basis of this sensitivity to the psychotomimetic effects of THC is unclear. METHODS: We investigated whether individuals who are sensitive to the psychotomimetic effects of THC (TP) under experimental conditions would show differential hippocampal activation compared with those who are not (NP)...
March 5, 2018: Psychological Medicine
Carmen Navarrete, Francisco Carrillo-Salinas, Belén Palomares, Miriam Mecha, Carla Jiménez-Jiménez, Leyre Mestre, Ana Feliú, Maria L Bellido, Bernd L Fiebich, Giovanni Appendino, Marco A Calzado, Carmen Guaza, Eduardo Muñoz
BACKGROUND: Multiple sclerosis (MS) is characterized by a combination of inflammatory and neurodegenerative processes variously dominant in different stages of the disease. Thus, immunosuppression is the goal standard for the inflammatory stage, and novel remyelination therapies are pursued to restore lost function. Cannabinoids such as9 Δ-THC and CBD are multi-target compounds already introduced in the clinical practice for multiple sclerosis (MS). Semisynthetic cannabinoids are designed to improve bioactivities and druggability of their natural precursors...
March 1, 2018: Journal of Neuroinflammation
María Fernández, Patricia Guerra, Eloya Martín, Noelia Martínez, Jose Antonio Álvarez-Diz
OBJECTIVE: Dysphoria gender treatment in adolescents is recent. Studies of adolescents treated with analogs are reduced. To ensure the quality of care and safety of the child, follow-up studies are necessary. The aim of the present research was to describe the characteristics of the process of medical and psychological attention in adolescents with the DG in the Gender Identity Treatment Unit of Asturias in the period 2007-2015. METHODS: The sample included 20 minors attended in the Gender Identity Treatment Unit of Asturias in the period 2007-2015...
February 28, 2018: Revista Española de Salud Pública
Xingzhen Zhang, Lei Peng, Anchang Liu, Jianbo Ji, Lixia Zhao, Guangxi Zhai
OBJECTIVES: To evaluate the effects of tetrahydrocurcumin (THC) on the radiosensitivity of glioma cells and the possible molecular mechanism. METHODS: MTT assay, colony forming and wound healing assays were performed to detect the proliferation, radiosensitivity and migration of cells with various treatments. Cell apoptosis, cell cycle and GHS level were determined for exploring potent sensitization mechanism of THC. Meanwhile, protein expressions of cyclin D1 and PCNA were also measured...
March 1, 2018: Journal of Pharmacy and Pharmacology
Jeffrey R Brubacher, Herbert Chan, Shannon Erdelyi, Mark Asbridge, Robert E Mann, Roy A Purssell, Robert Solomon
INTRODUCTION: Most countries have laws against driving while impaired by drugs. However, in many countries, including Canada and the United States, police must have individualized suspicion that the driver has recently used an impairing substance before they can gather the evidence required for laying a criminal charge. This report studies police documentation of drug involvement among drivers who had a motor-vehicle crash after using an impairing substance. METHODS: We obtained blood samples and police reports on injured drivers treated in participating British Columbia trauma centres following a crash...
February 23, 2018: Accident; Analysis and Prevention
Pamela Prini, Franceso Rusconi, Erica Zamberletti, Marina Gabaglio, Federica Penna, Mauro Fasano, Elena Battaglioli, Daniela Parolaro, Tiziana Rubino
BACKGROUND: Increasing cannabis consumption among adolescents, studies that link its early use with mental illnesses, and the political debate on cannabis legalization together call for an urgent need to study molecular underpinnings of adolescent brain vulnerability. The emerging role of epigenetic mechanisms in psychiatric diseases led us to hypothesize that epigenetic alterations could play a role in causes and subsequent development of the depressive/psychotic-like phenotype induced by adolescent, but not adult, Δ9-tetrahydrocannabinol (THC) exposure in female rats...
March 2018: Journal of Psychiatry & Neuroscience: JPN
Xiaoxi Zhang, Li Li, Bo Hong, Yi Xu, Yuan Liu, Qinghai Huang, Jianmin Liu
OBJECTIVE: Healthcare expenditures and cost reduction have been under critical surveillance in all countries and are critical for policy-makers. This review aims at qualitatively and quantitatively analyzing the difference of hospital costs and length of stay between endovascular coiling versus neurosurgical clipping in ruptured intracranial aneurysms (RA). METHODS: MEDLINE, the Cochrane database, EMBASE and Web of Science database were searched and evaluated independently by two authors according to Newcastle Ottawa Scale (NOS) for cohort studies describing economic hospital cost or length of stay in patients with ruptured aneurysms...
February 21, 2018: World Neurosurgery
Jennifer A Manuzak, Toni M Gott, Jay S Kirkwood, Ernesto Coronado, Tiffany Hensley-McBain, Charlene Miller, Ryan K Cheu, Ann C Collier, Nicholas T Funderburg, Jeffery N Martin, Michael C Wu, Nina Isoherranen, Peter W Hunt, Nichole R Klatt
Background: Cannabis is a widely used drug in the United States, and the frequency of cannabis use in the human immunodeficiency virus (HIV)-infected population is disproportionately high. Previous human and macaque studies suggest that cannabis may have an impact on plasma viral load; however, the relationship between cannabis use and HIV-associated systemic inflammation and immune activation has not been well defined. Methods: The impact of cannabis use on peripheral immune cell frequency, activation, and function was assessed in 198 HIV-infected, antiretroviral-treated individuals by flow cytometry...
February 17, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
Wei Ling Lau, Mahyar Khazaeli, Javad Savoj, Kasim Manekia, Maria Bangash, Roshni G Thakurta, Anhthu Dang, Nosratola D Vaziri, Bhupinder Singh
Tetrahydrocurcumin (THC) is the principal metabolite of curcumin and has antioxidant properties. In the present investigation, the effect of THC on renal and cardiovascular outcomes was studied in rats with chronic kidney disease (CKD). CKD rats were randomized following 5/6 nephrectomy to a special diet for 9 weeks which contained 1% THC (CKD+THC group). Low-dose polyenylphosphatidylcholine was used as a lipid carrier to increase bioavailability. Endpoints included tail blood pressure, normalized heart weight, plasma and urine biochemical data, and kidney tissue analyses...
April 2018: Pharmacology Research & Perspectives
Charlene Morrow, Rachel Thomas, Lili Ding, Jessica A Kahn
The aims of this study were to examine the feasibility of a protocol to assess for assessment and response to potential sexual abuse (defined as self-report of sexual initiation before age 13) among adolescent and young adult research participants in human papillomavirus (HPV) vaccination screening; determine the proportion of participants whose survey responses indicated potential sexual abuse and assess whether age, gender, race, and recruitment site were associated with potential abuse. We pooled data from three cross-sectional studies of 13-26 year-old women and men (N = 1541) recruited at a Teen Health Center (THC) and Health Department (HD)...
February 21, 2018: Research in Nursing & Health
Ziva D Cooper, Gillinder Bedi, Divya Ramesh, Rebecca Balter, Sandra D Comer, Margaret Haney
Cannabinoids combined with opioids produce synergistic antinociceptive effects, decreasing the lowest effective antinociceptive opioid dose (i.e., opioid-sparing effects) in laboratory animals. Although pain patients report greater analgesia when cannabis is used with opioids, no placebo-controlled studies have assessed the direct effects of opioids combined with cannabis in humans or the impact of the combination on abuse liability. This double-blind, placebo-controlled, within-subject study determined if cannabis enhances the analgesic effects of low dose oxycodone using a validated experimental model of pain and its effects on abuse liability...
February 5, 2018: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
Ram Kandasamy, Cole T Dawson, Tammy N Hilgendorf, Michael M Morgan
The potential of [INCREMENT]-tetrahydrocannabinol (THC) as a treatment for migraine depends on antinociceptive efficacy with repeated administration. Although morphine has good antinociceptive efficacy, repeated administration causes medication overuse headache (MOH) - a condition in which the intensity/frequency of migraine increases. The present study compared the effect of repeated morphine or THC administration on the magnitude and duration of migraine-like pain induced by a microinjection of allyl isothiocyanate (AITC) onto the dura mater of female rats...
February 16, 2018: Behavioural Pharmacology
Rebecca A LaFleur, Ronald P Wilson, Daniel J Morgan, Angela N Henderson-Redmond
Cannabinoids have shown promise for the treatment of intractable pain states and may represent an alternative pharmacotherapy for pain management. A growing body of clinical evidence suggests a role for sex in pain perception and in cannabinoid response. We examined cannabinoid sensitivity and tolerance in male and female mice expressing a desensitization-resistant form (S426A/S430A) of the cannabinoid type 1 receptor (CB1R). Mice were assessed for acute and inflammatory nociceptive behaviors in the formalin test following pretreatment with either vehicle or mixed CB1R/CB2R agonists, Δ-9-tetrahydrocannabinol ([INCREMENT]-THC) (1-6 mg/kg) or CP 55,940 (0...
February 15, 2018: Neuroreport
Benjamin J Whalley, Hong Lin, Lynne Bell, Thomas Hill, Amesha Patel, Roy A Gray, C Elizabeth Roberts, Orrin Devinsky, Michael Bazelot, Claire M Williams, Gary J Stephens
BACKGROUND AND PURPOSE: Numerous claims are made for cannabis' therapeutic utility upon human seizures, but concerns persist about risks. A potential confounder is the presence of both Δ9 -tetrahydrocannabinol (Δ9 -THC), variously reported to be pro- and anti-convulsant, and cannabidiol (CBD), widely confirmed as anticonvulsant. Therefore, we investigated effects of prolonged exposure to different Δ9 -THC/CBD cannabis extracts on seizure activity and associated measures of endocannabinoid (eCB) system signalling...
February 19, 2018: British Journal of Pharmacology
Huiyan Jin, Sharifa Z Williams, Stanford T Chihuri, Guohua Li, Qixuan Chen
BACKGROUND: Driving under the influence of marijuana is a serious traffic safety concern in the United States. Delta 9-tetrahydrocannabinol (THC) is the main active compound in marijuana. Although blood THC testing is a more accurate measure of THC-induced impairment, measuring THC in oral fluid is a less intrusive and less costly method of testing. METHODS: We examined whether the oral fluid THC test can be used as a valid alternative to the blood THC test using a sensitivity and specificity analysis and a logistic regression, and estimate the quantitative relationship between oral fluid THC concentration and blood THC concentration using a correlation analysis and a linear regression on the log-transformed THC concentrations...
February 19, 2018: Injury Epidemiology
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