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  • ∆9-tetrahydrocannabinol (THC), Cannabinoid receptor 1 (CB1), Cannabinoid/s
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How important are sex differences in cannabinoid action?

Abstract In humans as in animals, males and females are dissimilar in their genetic and hormonally driven behaviour; they process information differently, perceive experience and emotions in different ways, display diverse attitudes, language and social skills, and show sex-related differences in the brain anatomy and organization. Drug addiction is a widespread relapsing illness that affects both men and women. Sex-dependent differences have been frequently observed in the biological and behavioural effects of substances of abuse, including cannabis. Beside sex differences observed in the cannabinoid-induced effects related to cannabis abuse and dependence, cannabinoids have been shown to exert sex-dependent effects also in other physiological and...
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Acute Δ9-tetrahydrocannabinol blocks gastric hemorrhages induced by the nonsteroidal anti-inflammatory drug diclofenac sodium in mice

Please use this link to access this publication. Abstract Nonsteroidal anti-inflammatory drugs (NSAIDs), which are among the most widely used analgesics in the world, cause gastrointestinal inflammation that is potentially life-threatening. Although inhibitors of endocannabinoid catabolic enzymes protect against gastropathy in fasted NSAID-treated mice, the gastroprotective effects of Δ9-tetrahydrocannabinol (THC), the primary psychoactive component of marijuana, have yet to be investigated. Male C57BL/6J mice were fasted, administered vehicle or Δ9-THC (.01–50 mg/kg; oral or intraperitoneal), and then treated with the NSAID diclofenac sodium (100 mg/kg, p.o.) to induce gastric lesions. In separate groups of mice, the cannabimimetic behavioral effects of Δ9-THC given via each route of administration were compared using a battery of tests, consisting...
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Does cannabis use increase the risk of death? Systematic review of epidemiological evidence on adverse effects of cannabis use

Please use this link to access this publication. Abstract Issues. To conduct a comprehensive search of the peer-reviewed literature to assess risk of cannabis-related mortality. Approach. Systematic peer-reviewed literature searches were conducted in Medline, EMBASE and PsycINFO to identify data on mortality associated with cannabis use. Search strings for cannabis and mortality were used. Searches were limited to human subjects and the publication timeframe of January 1990 to January 2008. Reference lists of review articles and of specific studies deemed important by colleagues were searched to identify additional studies. A list of the selected articles was emailed to experts in the field asking for comment on completeness. Key Findings. There is insufficient evidence,...
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Examining the roles of cannabinoids in pain and other therapeutic indications: a review

Please use this link to access this publication. Abstract Importance of the field: In recent times, our knowledge of cannabinoids and the endocannabinoid system has greatly advanced. With expanding knowledge, synthetic cannabinoids – including nabilone, dronabinol and a combination of synthetic Δ9-THC and cannabidiol – have been developed and tested for benefit in a variety of therapeutic indications. Areas covered in this review: The aim of this article is to provide a summative review of the vast amount of clinical trial data now available on these agents. What the reader will gain: To locate clinical trials for review, a literature search was performed using PubMed between the...
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Medical cannabis in pediatric oncology: a survey of patients and caregivers

Please use this link to access this publication. Abstract Background: There are minimal data regarding the safety and efficacy of cannabis used as an anti-cancer agent or for symptom management in pediatric oncology. We aimed to characterize the prevalence and factors associated with the use of cannabis for the treatment of cancer and management of cancer-related symptoms in children during or after cancer treatment. Methods: An anonymous 40 question paper survey was offered to patients/caregivers of children with cancer attending a pediatric oncology clinic in a provincially mandated cancer agency between October 2019 and March 2020. Results: There were 64 respondents included in the analysis. Fourteen participants...
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Chronic effects of cannabis use on the human reward system: An fMRI study

Please use this link to access this publication. Abstract Cannabis is one of the most used drugs of abuse. It affects the brain reward system in animals, and has proven rewarding and addictive potential in humans. We used functional MRI to measure brain activity during reward anticipation in a monetary reward task. Long-term cannabis users were compared to healthy controls. An additional control group consisting of nicotine users was included. Cannabis users showed attenuated brain activity during reward anticipation in the nucleus accumbens compared to non-smoking controls, but not compared to smoking controls. Cannabis users showed decreased reward anticipation activity in the caudate nucleus, compared to both...
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Δ9-THC modulation of fatty acid 2-hydroxylase (FA2H) gene expression: Possible involvement of induced levels of PPARα in MDA-MB-231 breast cancer cells

Please use this link to access this publication. Abstract We recently reported that Δ9-tetrahydrocannabinol (Δ9-THC), a major cannabinoid component in Cannabis Sativa (marijuana), significantly stimulated the expression of fatty acid 2-hydroxylase (FA2H) in human breast cancer MDA-MB-231 cells. Peroxisome proliferator-activated receptor α (PPARα) was previously implicated in this induction. However, the mechanisms mediating this induction have not been elucidated in detail. We performed a DNA microarray analysis of Δ9-THC-treated samples and showed the selective up-regulation of the PPARα isoform coupled with the induction of FA2H over the other isoforms (β and γ). Δ9-THC itself had no binding/activation potential to/on PPARα, and palmitic acid (PA), a PPARα ligand, exhibited no stimulatory effects on FA2H in...
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Differential transcriptional profiles mediated by exposure to the cannabinoids cannabidiol and Δ9-tetrahydrocannabinol in BV-2 microglial cells

Abstract BACKGROUND AND PURPOSE Apart from their effects on mood and reward, cannabinoids exert beneficial actions such as neuroprotection and attenuation of inflammation. The immunosuppressive activity of cannabinoids has been well established. However, the underlying mechanisms are largely unknown. We previously showed that the psychoactive cannabinoid Δ9-tetrahydrocannabinol (THC) and the non-psychoactive cannabidiol (CBD) differ in their anti-inflammatory signalling pathways. EXPERIMENTAL APPROACH To characterize the transcriptional effects of CBD and THC, we treated BV-2 microglial cells with these compounds and performed comparative microarray analysis using the Illumina MouseRef-8 BeadChip platform. Ingenuity Pathway Analysis was performed to identify functional subsets of genes and networks regulated by CBD and/or...
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Reversal of age-related cognitive impairments in mice by an extremely low dose of tetrahydrocannabinol

Please use this link to access this publication. Abstract This study was designed to test our hypothesis that an ultra-low dose of delta-9 tetrahydrocannabinol (THC) reverses age-dependent cognitive impairments in old mice and to examine the possible biological mechanisms that underlie this behavioral effect. Old female mice aged 24 months that had been injected once with 0.002 mg/kg THC (3–4 orders of magnitudes lower than doses that induce the conventional cannabinoid effects in mice) performed significantly better than vehicle-treated old mice and performed similarly to naive young mice aged 2 months, in 6 different behavioral assays that measured various aspects of memory and learning. The beneficial effect of THC lasted for at least 7 weeks. The single injection...
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Developmental Effects of Cannabidiol and Δ9-Tetrahydrocannabinol in Zebrafish

Abstract Cannabidiol (CBD) has gained much attention in the past several years for its therapeutic potential in the treatment of drug-resistant epilepsy, such as Dravet syndrome. Although CBD has shown anecdotal efficacy in reducing seizure frequency, little is known regarding the potential adverse side effects of CBD on physiology, development, organogenesis, or behavior. The goal of this project was to compare the relative morphological, behavioral, and gene expression phenotypes resulting after a developmental exposure to Δ9-tetrahydrocannabinol (THC) or CBD. Zebrafish were exposed from blastula through larval stage (96 h postfertilization [hpf]) to 0.3, 0.6, 1.25, 2.5, 5 mg/l (1, 2, 4, 8, 16 µM) THC or...
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