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Frequent teenage cannabis use: Prevalence across adolescence and associations with young adult psychopathology and functional well-being in an urban cohort

Please use this link to access this publication. Abstract Background Amidst cannabis legalization efforts and laws, we do not fully understand how the youngest frequent cannabis users fare during young adulthood. This study aims to 1) examine the prevalence of cannabis use during adolescence, and 2) investigate links of frequent (i.e., weekly or daily) teenage cannabis use with psychopathology and functional well-being at age 20—compared to no or occasional use. Methods Data came from a prospective-longitudinal cohort study (assessments from 2004 to 2018, from ages 7–20) in an urban setting (N = 1482). Substance use was assessed with self-reports between ages 13 and 20. At age 20, participants reported on psychopathology (psychotic...
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Cannabis constituents interact at the drug efflux pump BCRP to markedly increase plasma cannabidiolic acid concentrations

Abstract Cannabis is a complex mixture of hundreds of bioactive molecules. This provides the potential for pharmacological interactions between cannabis constituents, a phenomenon referred to as “the entourage effect” by the medicinal cannabis community. We hypothesize that pharmacokinetic interactions between cannabis constituents could substantially alter systemic cannabinoid concentrations. To address this hypothesis we compared pharmacokinetic parameters of cannabinoids administered orally in a cannabis extract to those administered as individual cannabinoids at equivalent doses in mice. Astonishingly, plasma cannabidiolic acid (CBDA) concentrations were 14-times higher following administration in the cannabis extract than when administered as a single molecule. In vitro transwell assays identified CBDA as...
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Is Cannabis being used as a substitute for non-medical opioids by adults with problem substance use in the United States? A within-person analysis

Please use this link to access this publication. Abstract Background and Aims Ecological studies have suggested that Cannabis legalization might have led to a decrease in opioid overdose deaths. Such studies do not provide information about whether individuals are substituting Cannabis for opioids at different points in time. The current study assessed the magnitude of the daily association between Cannabis and opioid use in individual adults with and without pain who use non-medical opioids. Design Prospective cohort study. Setting The greater New York area and a suburban inpatient addiction program. Participants Adults with problem substance use who use non-medical opioids, recruited from May 2016–June...
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Intersectional analysis of cannabis use, stigma and health among marginalized Nigerian women

Abstract Cannabis use by women has been under-researched, particularly use by marginalized women in developing societies. This article draws on qualitative research in Uyo, Nigeria, to explore how intersecting stigmas around social identity categories (e.g. gender, sex work) shapes cannabis use and contributes to health harms for marginalized women. Qualitative data were collected via in-depth interviews with street-involved female cannabis users, and transcribed, coded and analysed thematically. Initiation of cannabis use was influenced by social networks and sexual relationships. Heavy cannabis use enabled some women to perform alternative femininity thereby challenging the boundaries of appropriate gendered behaviour, while others were pressured by normative expectations...
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Effect of roasting on antioxidative properties, polyphenol profile and fatty acids composition of hemp (Cannabis sativa L.) seeds

Please use this link to access this publication. Abstract This study was done to investigate the effect of roasting time (7, 14, and 21min) at 160 ᵒC on proximate composition, colour attributes, bioactive compounds, and fatty acids composition of hemp (Cannabis sativa L.) seeds. Roasting of the seeds for different periods significantly (P < 0.05) increased the protein, oil, total phenolic, total flavonoid, and DPPH scavenging. The lightness (L*) and yellowness (b*) of the samples were significantly (P < 0.05) decreased with roasting time but redness (a*) was increased. Moreover, phenolic acids, flavones, polyphenols, and glycosylated flavonoids were increased significantly with the roasting time. Roasting of the seed slightly affected fatty acid contents....
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Age-Related Differences in Cannabis Product Use

Please use this link to access this publication. ABSTRACT Cannabis use varies with age and gender, but less is known regarding specific product choices. Previous work suggests that older adults are inclined to stick to the more “classic” and familiar, while “novel” products are more likely to appeal to younger populations. We examined cross-sectional, retrospective data to determine whether the type of cannabis products used varied according to participant age (N = 1406, 71.3% female). The extensive list of products included: loose flower, pre-rolled joints, edibles, concentrates, oil vaporizers (vape pens), dry vaporizers, tinctures, topicals, and ingestible oils. Overall, rates of use for cannabis-infused ingestible...
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Epidemiological overview of multidimensional chromosomal and genome toxicity of cannabis exposure in congenital anomalies and cancer development

Abstract Cannabis and cannabinoids are implicated in multiple genotoxic, epigenotoxic and chromosomal-toxic mechanisms and interact with several morphogenic pathways, likely underpinning previous reports of links between cannabis and congenital anomalies and heritable tumours. However the effects of cannabinoid genotoxicity have not been assessed on whole populations and formal consideration of effects as a broadly acting genotoxin remain unexplored. Our study addressed these knowledge gaps in USA datasets. Cancer data from CDC, drug exposure data from National Survey of Drug Use and Health 2003–2017 and congenital anomaly data from National Birth Defects Prevention Network were used. We show that cannabis, THC cannabigerol and cannabichromene exposure...
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No pain, all gain? Interim analyses from a longitudinal, observational study examining the impact of medical cannabis treatment on chronic pain and related symptoms.

Please use this link to access this publication. Abstract Previous studies have demonstrated improvements in pain following short-term medical cannabis (MC) use, suggesting long-term MC treatment may alleviate symptoms associated with chronic pain. The goal of this observational and longitudinal study was to examine patients using MC to treat chronic pain pre versus post MC treatment. These interim analyses included 37 patients with chronic pain evaluated prior to initiation of MC treatment and following 3 and 6 months of MC use; pain, clinical state, sleep, quality of life, and conventional medication use were assessed. Correlation analyses examined the relationship between changes in pain and...
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Effects of cannabis on visual function and self-perceived visual quality

Abstract Cannabis is one of the most used drugs of abuse in the world. The objective of this study was to analyze the effects of smoking cannabis on vision and to relate these to those perceived by the user. Thirty-one cannabis users participated in this study. Visual function assessment was carried out in a baseline session as well as after smoking cannabis. We evaluated static visual acuity, contrast sensitivity, stereoacuity, accommodative response, straylight, night-vision disturbances (halos) and pupil size. The participants were also divided into two groups depending on whether they perceived their vision to have worsened after smoking cannabis. A logistic regression analysis...
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Different Cannabis sativa Extraction Methods Result in Different Biological Activities against a Colon Cancer Cell Line and Healthy Colon Cells

Abstract Cannabis sativa is one of the oldest medicinal plants used by humans, containing hundreds of bioactive compounds. The biological effects and interplay of these compounds are far from fully understood, although the plant’s therapeutic effects are beyond doubt. Extraction methods for these compounds are becoming an integral part of modern Cannabis-based medicine. Still, little is known about how different methods affect the final composition of Cannabis extracts and thus, their therapeutic effects. In this study, different extraction methods were tested, namely maceration, Soxhlet, ultrasound-assisted extraction (UAE), and supercritical CO2 extraction methods. The obtained extracts were evaluated for their cannabinoid content, antioxidant properties, and in vitro bioactivity on human...
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