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Studying ultrasonic vocalizations (USVs) plays a crucial role in understanding animal communication, particularly in the field of ethology and neuropharmacology. Communication is associated with social behaviour; so, USVs study is a valid assay in behavioural readout and monitoring in this context. This paper delved into an investigation of ultrasonic communication in mice treated with Cannabis sativa oil (CS mice), which has been demonstrated having a prosocial effect on behaviour of mice, versus control mice (vehicle‐treated, VH mice). To conduct this study, we created a dataset by recording audio‐video files and annotating the duration of time that test mice spent engaging in social activities, along with categorizing the types of emitted USVs. The analysis encompassed the frequency of individual sounds as well as more complex sequences of consecutive syllables (patterns). The primary goal was to examine the extent and nature of diversity in ultrasonic communication patterns emitted by these two groups of mice. As a result, we observed statistically significant differences for each considered pattern length between the two groups of mice. Additionally, the study extended its research by considering specific behaviours, aiming to ascertain whether dissimilarities in ultrasonic communication between CS and VH mice are more pronounced or subtle within distinct behavioural contexts. Our findings suggest that while there is variation in USV communication between the two groups of mice, the degree of this diversity may vary depending on the specific behaviour being observed. [ABSTRACT FROM AUTHOR]

Background/Aims: The COVID‐19 pandemic has significantly impacted face‐to‐face research. This has propelled ideas and plans for more remote styles of research and provided new perspectives on conducting research. This paper aimed to identify challenges specific to conducting remote forms of experimental addiction research, although some of these challenges apply to all types of addiction research. Argument The impact of the COVID‐19 pandemic has led to important lessons for future addiction research. Although remote research has been conducted for decades, little experimental research has been performed remotely. To do so require a new perspective on what research questions we can ask and could also enable preferential capture of those who may be more reluctant to engage in research based in clinical settings. There may, however, be crucial factors that will compromise this process. We illustrate our argument with three real‐world, ongoing case studies centred on gambling behaviour, opioid overdose, and cannabinoid psychopharmacology. We highlight the obstacles to overcome to enable more remote methods of study. Conclusions: The future of experimental research and, more generally, addiction research, will be shaped by the pandemic and may result in advantages, such as reaching different populations and conducting addiction research in more naturalistic settings. [ABSTRACT FROM AUTHOR]

The construction of parents' cannabis use in the context of child protection has far‐reaching implications for how their parenting is perceived and assessed and for the decisions made regarding their children's lives. Yet little is known about the meanings various stakeholders in child protection processes attribute to parents' cannabis use. This paper aims to explore constructions of parents' cannabis use in child protection court proceedings and position them within a political and social context. A qualitative data mining method was used to examine 32 Family Court judgements in care proceedings that involved parents using cannabis in England and Wales. The analysis of the judgements revealed that most portrayed parents' cannabis use as a negative, deviant and harmful activity. Three constructions of cannabis use were identified: cannabis use as a risk to children, cannabis use as proof of parents' deficits, and cannabis use as (responsible) self‐medication. The discussion considers the findings in light of two social and political processes that underpin child protection policy and practice: the adoption of a risk perspective and the manifestation of othering processes. Implications for policy and practice highlight the importance of developing a critical framework for responding to parental cannabis use. [ABSTRACT FROM AUTHOR]

Background and aims: There are concerns that availability of recreational cannabis dispensaries (RCDs) and point‐of‐sale marketing may lead to increased cannabis use in jurisdictions where cannabis retail sale is legal. This paper examined whether the availability RCDs and the presence of storefront signage indicative of cannabis and signs promoting health benefits in RCDs were associated with cannabis use and risk perceptions. Design: Cross‐sectional, secondary data analysis. Setting: California, USA. Participants: A representative sample of 3385 adults in California who participated in the 2020 probability‐based Marijuana Use and Environment Survey. Measurements Binary outcomes included past‐month overall cannabis use, perceiving cannabis smoking as harmful and past‐month cannabis use by purpose (medical only, recreational only and dual). The objectively assessed predictors included proximity and density of RCDs and presence of storefront signage indicative of cannabis and signs promoting health benefits in RCDs. Findings In terms of proximity, thepresence of storefront signage in the nearest RCD was associated with smaller odds of perceiving cannabis smoking as harmful [odds ratio (OR) = 0.63, 95% confidence interval (CI) = 0.39, 0.99] if the RCD was located within 2 miles of home. Presence of health benefit signs in the nearest RCD was associated with greater odds of overall cannabis use (OR = 2.45, 95% CI = 1.17, 5.16) and recreational use (OR = 3.50, 95% CI = 1.027, 11.91) if the RCD was located within 2–4 miles of home. In terms of density, count of RCDs, count of RCDs with storefront signage and count of RCDs with health benefit signs within 2 miles of home were each separately associated with greater odds of overall cannabis use and cannabis use for dual purposes. Conclusions: The availability of recreational cannabis dispensaries within 2 miles of one's home and the presence of storefront signage indicating the availability of cannabis and signs promoting health benefits of cannabis appear to be associated with increased cannabis use and reduced risk perceptions among adults in California, USA. [ABSTRACT FROM AUTHOR]

Cannabis sativa L. is undoubtedly the most used recreational drug worldwide because of its desired acute psychotropic effects, like relaxation, euphoria and altered perceptions. In addition, promising medical properties of Cannabis components have gained a lot of attention, resulting in a debate to permit recreational Cannabis use in several countries. In recent years, this controversial plant was increasingly studied and a large number of scientific papers were published. Herbal Cannabis consists of a variable and complex matrix, which makes it challenging to properly seize and prepare the sample for qualitative and quantitative analysis. Moreover, both the adoption of legal cut‐off values in different countries for the Δ9‐tetrahydrocannabinol (THC) content in seizures, and the emergence of cannabidiol (CBD) based products, containing generally small but variable amounts of THC, urged the need for sensitive and reliable analytical techniques to accurately identify and quantify the components of interest. This review presents detailed information on the procedure prior to analysis and covers chromatographic and spectroscopic methods developed for the analysis of cannabinoids in seizures for different forensic purposes, that is, identification/quantification, potency testing, drug‐ and fiber‐type differentiation, age estimation, yield determination and Cannabis profiling. Advantages and drawbacks of existing methods, within a specific forensic context, are discussed. The application of chemometrics, which offers a powerful tool in interpreting complex data, is also explained. This article is categorized under:Toxicology > CannabisToxicology > Drug AnalysisForensic Chemistry and Trace Evidence > Presentation and Evaluation of Forensic Science Output [ABSTRACT FROM AUTHOR]

In this paper, the quantitative structure‐activity relationship predictive models (QSAR) are presented: the prediction model for some of the main components of cannabis sativa, acute toxicity LD50 (n=45, r2=0.917, q2=0.902), chronic toxicity LOAEL (n=35, r2=0.911, q2=0.868), NOAEL(n=22, r2=0.964, q2=0.937), LOEL (n=26, r2=0.911, q2=0.863) and NOEL (n=25, r2=0.867, q2=0.802), in addition to carcinogenicity and mutagenicity effects. Only for the case of LD50, the values reported in the literature of the delta 9‐THC compound present in Cannabis sativa were taken into account and this model was applied to the other compounds present in the plant, which we consider the most relevant since they fell from the allowed domain for QSAR Toolbox to predict the LD50 of each of them, while the other additional endpoints were established according to the methodology that marks the QSAR Toolbox software. The application of these models and predictions allowed us to predict the permissible daily exposure (PDE) and acceptable daily intake (ADI) values of some of the cannabis components. This work aims to present important elements of the toxicology of some of the components of the plant that serve only as a reference and does not intend to favor or inhibit the use of cannabis for medicinal or recreational use. [ABSTRACT FROM AUTHOR]

Background and aim: In Uruguay, residents age 18 and older seeking legal cannabis must register with the government and choose one of three supply mechanisms: self‐cultivation, non‐profit cannabis clubs or pharmacies. This is the first paper to measure the association between type of legal cannabis supply mechanism and traffic crashes involving injuries. Design Ecological study using ordinary least squares regression to examine how department‐level variation in registrations (overall and by type) is associated with traffic crashes involving injuries. Setting: Uruguay. Cases 532 department‐quarters. Measurements Quarterly cannabis registration counts at the department level and incident‐level traffic crash data were obtained from government agencies. The analyses controlled for department‐level economic and demographic characteristics and, as a robustness check, we included traffic violations involving alcohol for departments reporting this information. Department‐level data on crashes, registrations and alcohol violations were denominated by the number of residents ages 18 and older. Findings From 2013 to 2019, the average number of registrations at the department‐quarter level per 10 000 residents age 18 and older for self‐cultivation, club membership and pharmacy purchasing were 17.7 (SD = 16.8), 3.6 (SD = 8.6), and 25.1 (SD = 50.4), respectively. In our multivariate regression analyses, we did not find a statistically significant association between the total number of registrations and traffic crashes with injuries (β = −0.007; P = 0.398; 95% CI = −0.023, 0.01). Analyses focused on the specific supply mechanisms found a consistent, positive and statistically significant association between the number of individuals registered as self‐cultivators and the number of traffic crashes with injuries (β = 0.194; P = 0.008; 95% CI = 0.058, 0.329). Associations for other supply mechanisms were inconsistent across the various model specifications. Conclusions: In Uruguay, the number of people allowed to self‐cultivate cannabis is positively associated with traffic crashes involving injuries. Individual‐level analyses are needed to assess better the factors underlying this association. [ABSTRACT FROM AUTHOR]

Currently, there is much interest in the sales and study of consumable Cannabis sativa L. products that contain relatively high levels of cannabidiol (CBD) and low levels of Δ‐9‐tetrahydrocannabinol. While there are published safety evaluations for extracts containing low concentrations of CBD, toxicological assessments for those with higher concentrations are still scant in the public domain. In this paper, genotoxicity tests and a 90‐day repeated‐dose toxicity study of an ethanolic extract of C. sativa containing ~85% CBD were performed following relevant OECD guidelines. No increased gene mutations were observed in a bacterial reverse mutation assay compared to controls up to the maximum recommended concentration of the guideline. An in vitro chromosomal aberration assay showed no positive findings in the short‐term (3 h) treatment assays. Long‐term treatment (20 h) showed an increased number of cells containing aberrations at the highest dose of 2 μg/mL, which was outside of historical control levels, but not statistically significantly different from the controls. An in vivo micronucleus study showed no genotoxic potential of the test item in mice. A 90‐day repeated‐dose gavage study using 0, 75, 125, and 175 mg/kg bw/day showed several slight findings that were considered likely to be related to an adaptive response to consumption of the extract by the animals but were not considered toxicologically relevant. These included increases in liver and adrenal weights compared to controls. The NOAEL was determined as 175 mg/kg bw/day, the highest dose tested (equivalent to approximately 150 mg/kg bw/day of CBD). A toxicological assessment of an ethanolic Cannabis sativa extract containing ~85% CBD was performed. Genotoxicity concern based on a bacterial reverse mutation assay, an in vitro chromosomal aberration assay, and an in vivo mouse micronucleus assay was considered low. A 90‐day repeated dose study in rats showed some adaptive responses but no toxicological concern. The NOAEL was 175 mg/kg bw/day, the highest dose tested. [ABSTRACT FROM AUTHOR]

Background: We recently showed that alcohol and cannabis can interact prenatally, and in a recent review paper, we identified parvalbumin‐positive (PV) interneurons in the hippocampus as a potential point of convergence for these teratogens. Methods: A 2 (Ethanol [EtOH], Air) × 2 (tetrahydrocannabinol [THC], Vehicle) design was used to expose pregnant Sprague‐Dawley rats to either EtOH or air, in addition to either THC or the inhalant vehicle solution, during gestational days 5–20. Immunohistochemistry was performed to detect PV interneurons in 1 male and 1 female pup from each litter at postnatal day 70. Results: Significant between‐group and subregion‐specific effects were found in the dorsal cornu ammonis 1 (CA1) subfield and the ventral dentate gyrus (DG). In the dorsal CA1 subfield, there was an increase in the number of PV interneurons in both the EtOH and EtOH +THC groups, but a decrease with THC alone. There were fewer changes in interneuron numbers overall in the DG, though there was a sex difference, with a decrease in the number of PV interneurons in the THC‐exposed group in males. There was also a greater cell layer volume in the DG in the EtOH +THC group than the control group, and in the CA1 region in the EtOH group compared to the control and THC groups. Conclusions: Prenatal exposure to alcohol and THC differentially affects parvalbumin‐positive interneuron numbers in the hippocampus, indicating that both individual and combined exposure can impact the balance of excitation and inhibition in a structure critically involved in learning and memory processes. [ABSTRACT FROM AUTHOR]

The article comments on a paper by G. Bischof and colleagues on the secondary health impacts of people living and not living with a person's substance use disorder. Topics mentioned include the two elements that can show societal estimates of the people who are seriously affected with person's substance use disorder, the structural factors related to harm to others, and the effect of alcohol consumption.

The January issue of the American Journal of Psychiatry (AJP) focuses on the interactions between alcohol use, cannabis use, substance use disorders (SUDs), and other psychiatric illnesses. One of the biggest questions for clinicians treating patients with first‐episode psychosis when cannabis has been involved is the chicken‐and‐egg question — was the psychosis brought on by cannabis use or was the patient using it to self‐medicate? [ABSTRACT FROM AUTHOR]

Hemp (Cannabis sativa L.) has historically played a vital role in agriculture across the globe. Feral and wild populations have served as genetic resources for breeding, conservation, and adaptation to changing environmental conditions. However, feral populations of Cannabis, specifically in the Midwestern United States, remain poorly understood. This study aims to characterize the abiotic tolerances of these populations, estimate suitable areas, identify regions at risk of abiotic suitability change, and highlight the utility of ecological niche models (ENMs) in germplasm conservation. The Maxent algorithm was used to construct a series of ENMs. Validation metrics and MOP (Mobility‐oriented Parity) analysis were used to assess extrapolation risk and model performance. We also projected the final projected under current and future climate scenarios (2021–2040 and 2061–2080) to assess how abiotic suitability changes with time. Climate change scenarios indicated an expansion of suitable habitat, with priority areas for germplasm collection in Indiana, Illinois, Kansas, Missouri, and Nebraska. This study demonstrates the application of ENMs for characterizing feral Cannabis populations and highlights their value in germplasm conservation and breeding efforts. Populations of feral C. sativa in the Midwest are of high interest, and future research should focus on utilizing tools to aid the collection of materials for the characterization of genetic diversity and adaptation to a changing climate. [ABSTRACT FROM AUTHOR]

Cannabis–drug interactions have caused significant concerns, mainly due to their role in the cytochrome P450 (CYP) enzyme‐mediated metabolic pathway of numerous medications. A systematic review was conducted to gain an overview of the potential interactions of cannabis with different drug classes by extracting pertinent information from published study data. From the inception of the study to October 1, 2023, we performed a systematic search of PubMed, Scopus, clinicaltrials.gov, and Web of Science. We included 54 out of 464 articles, and a total of 20 drug classes were identified to have interactions with medicinal cannabis. The cannabis–drug interactions were assessed and classified according to their probability and severity. The analysis revealed that antiepileptics had the most evidence of interaction with cannabis, followed by clobazam (CLB), warfarin, and tacrolimus. Generally, cannabis–drug interactions result in pharmacokinetic (PK) or pharmacodynamic (PD) changes. Therefore, careful monitoring should be performed to detect any unusual elevations in plasma levels. In addition, dose titrations or treatment withdrawal could help mitigate the adverse effects attributed to cannabis–drug interactions. Nevertheless, novel drugs are constantly emerging, and more research is needed to further identify potential interactions with cannabis. [ABSTRACT FROM AUTHOR]

The article discusses comments on a paper by S. Allaf and colleagues about the comparison of legal cannabis markets from various countries. Topics mentioned include the impact of the increase in acute cannabis poisoning in pediatric patients on the decision to legalize and decriminalize cannabis products, the ban of cannabis products with high content of tetrahydrocannabinol, and the advantages of regulations to minimize harm caused by cannabis products.

This article discusses the optimization of an ex vitro one-step hairy root transformation method in drug- and hemp-type cannabis using the RUBY system. Cannabis is a versatile plant species that has gained attention in medical research and industry due to recent legalization. The concentration of the cannabinoid Δ9‐tetrahydrocannabinol (THC) determines the legal categorization of cannabis as hemp-type or drug-type. The study presents a new method for transforming cannabis roots using the RUBY system, which allows for the visual identification of transformed roots. The results show that the transformation efficiency varied based on the bacterial strain and seed type, with drug-type cannabis exhibiting higher transformation rates. This ex vitro method offers simplicity, speed, and reduced contamination risk, making it suitable for the efficient production of secondary metabolites in cannabis. [Extracted from the article]

Background: Globally, cannabis laws and regulations are rapidly changing. Countries are increasingly permitting access to cannabis under various decriminalization, medicalization, and legalization laws. With strong economic, public health, and social justice incentives driving these domestic cannabis policy reforms, liberalization trends are bound to continue. However, despite a large and growing body of interdisciplinary research addressing the policy‐relevant health, safety, and socioeconomic consequences of cannabis liberalization, there is a lack of robust primary and systematic research that comprehensively investigates the consequences of these reforms. Objectives: This evidence and gap map (EGM) summarizes the empirical evidence on cannabis liberalization policies. Primary objectives were to develop a conceptual framework linking cannabis liberalization policies to relevant outcomes, descriptively summarize the empirical evidence, and identify areas of evidence concentration and gaps. Search Methods: We comprehensively searched for eligible English‐language empirical studies published across 23 academic databases and 11 gray literature sources through August 2020. Additions to the pool of potentially eligible studies from supplemental sources were made through November 2020. Selection Criteria: The conceptual framework for this EGM draws upon a legal epidemiological perspective highlighting the causal effects of law and policy on population‐level outcomes. Eligible interventions include policies that create or expand access to a legal or decriminalized supply of cannabis: comprehensive medical cannabis laws (MCLs), limited medical cannabidiol laws (CBDLs), recreational cannabis laws (RCLs), industrial hemp laws (IHLs), and decriminalization of cultivations laws (DCLs). Eligible outcomes include intermediate responses (i.e., attitudes/behaviors and markets/environments) and longer‐term consequences (health, safety, and socioeconomic outcomes) of these laws. Data Collection and Analysis: Both dual screening and dual data extraction were performed with third person deconfliction. Primary studies were appraised using the Maryland Scientific Methods Scale and systematic reviews were assessed using AMSTAR 2. Main Results: The EGM includes 447 studies, comprising 438 primary studies and nine systematic reviews. Most research derives from the United States, with little research from other countries. By far, most cannabis liberalization research focuses on the effects of MCLs and RCLs. Studies targeting other laws—including CBDLs, IHLs, and DCLs—are relatively rare. Of the 113 distinct outcomes we documented, cannabis use was the single most frequently investigated. More than half these outcomes were addressed by three or fewer studies, highlighting substantial evidence gaps in the literature. The systematic evidence base is relatively small, comprising just seven completed reviews on cannabis use (3), opioid‐related harms (3), and alcohol‐related outcomes (1). Moreover, we have limited confidence in the reviews, as five were appraised as minimal quality and two as low quality. Authors' Conclusions: More primary and systematic research is needed to better understand the effects of cannabis liberalization laws on longer‐term—and arguably more salient—health, safety, and socioeconomic outcomes. Since most research concerns MCLs and RCLs, there is a critical need for research on the societal impacts of industrial hemp production, medical CBD products, and decriminalized cannabis cultivation. Future research should also prioritize understanding the heterogeneous effects of these laws given differences in specific provisions and implementation across jurisdictions. [ABSTRACT FROM AUTHOR]

Aim: This study aims to analyze the health‐related quality of life (HRQoL) and safety outcomes in attention‐deficit/hyperactivity disorder (ADHD) patients treated with cannabis‐based medicinal products (CBMPs). Methods: Patients were identified from the UK Medical Cannabis Registry. Primary outcomes were changes in the following patient‐reported outcome measures (PROMs) at 1, 3, 6, and 12 months from baseline: EQ‐5D‐5L index value, generalized anxiety disorder‐7 (GAD‐7) questionnaire, and the single‐item sleep quality score (SQS). Secondary outcomes assessed the incidence of adverse events. Statistical significance was defined as p < 0.050. Results: Sixty‐eight patients met the inclusion criteria. Significant improvements were identified in general HRQoL assessed by EQ‐5D‐5L index value at 1, 3, and 6 months (p < 0.050). Improvements were also identified in GAD‐7 and SQS scores at 1, 3, 6, and 12 months (p < 0.010). 61 (89.71%) adverse events were recorded by 11 (16.18%) participants, of which most were moderate (n = 26, 38.24%). Conclusion: An association between CBMP treatment and improvements in anxiety, sleep quality, and general HRQoL was observed in patients with ADHD. Treatment was well tolerated at 12 months. Results must be interpreted with caution as a causative effect cannot be proven. These results, however, do provide additional support for future evaluation within randomized controlled trials. [ABSTRACT FROM AUTHOR]

Cannabidiol (CBD), a main nonpsychoactive phytocannabinoid in the Cannabis genus, has been in the limelight for its potential health benefits in various neurological diseases. However, the safety issue of CBD in the nervous system has not been settled fully, while CBD has been reported to have mild side effects including dizziness and somnolence. In this work, a platform of neuron‐astrocyte sandwich coculture to investigate the neurotoxicity of CBD, as well as the neuronal responses to CBD, in a more in vivo relevant mode is constructed. CBD (15 and 30 µm) causes the viability decrease, along with morphological damage, in the neuron‐alone culture, whereas its neurotoxic effects are significantly attenuated by the supports of astrocytes in the neuron‐astrocyte coculture. In addition, it is found that CBD‐induced increase of intracellular Ca2+ concentration and depolarization of mitochondrial membrane potential, via activation of transient receptor potential vanilloid 1, are noticeably ameliorated by coculturing neurons with astrocytes. This work provides crucial information in the development of CBD as therapeutics for neurological disorders, as well as in a fundamental understanding of how CBD works in the nervous system. [ABSTRACT FROM AUTHOR]

Background and Aims: Treatments for cannabis use disorder (CUD) have limited efficacy and little is known about who responds to existing treatments. Accurately predicting who will respond to treatment can improve clinical decision‐making by allowing clinicians to offer the most appropriate level and type of care. This study aimed to determine whether multivariable/machine learning models can be used to classify CUD treatment responders versus non‐responders. Methods: This secondary analysis used data from a National Drug Abuse Treatment Clinical Trials Network multi‐site outpatient clinical trial in the United States. Adults with CUD (n = 302) received 12 weeks of contingency management, brief cessation counseling and were randomized to receive additionally either (1) N‐Acetylcysteine or (2) placebo. Multivariable/machine learning models were used to classify treatment responders (i.e. two consecutive negative urine cannabinoid tests or a 50% reduction in days of use) versus non‐responders using baseline demographic, medical, psychiatric and substance use information. Results: Prediction performance for various machine learning and regression prediction models yielded area under the curves (AUCs) >0.70 for four models (0.72–0.77), with support vector machine models having the highest overall accuracy (73%; 95% CI = 68–78%) and AUC (0.77; 95% CI = 0.72, 0.83). Fourteen variables were retained in at least three of four top models, including demographic (ethnicity, education), medical (diastolic/systolic blood pressure, overall health, neurological diagnosis), psychiatric (depressive symptoms, generalized anxiety disorder, antisocial personality disorder) and substance use (tobacco smoker, baseline cannabinoid level, amphetamine use, age of experimentation with other substances, cannabis withdrawal intensity) characteristics. Conclusions: Multivariable/machine learning models can improve on chance prediction of treatment response to outpatient cannabis use disorder treatment, although further improvements in prediction performance are likely necessary for decisions about clinical care. [ABSTRACT FROM AUTHOR]

The Monitoring the Future (MTF) panel study released this month shows that adults ages 35–50 have a big problem with binge drinking and marijuana. This panel study focuses on post‐high school participants; the basic MTF survey is of high school students only. So, epidemiologists can now find out about trends as these young people get older. And it is a good thing to know too, because the most recent survey has found that among adults ages 35–50, there are historic highs for. [ABSTRACT FROM AUTHOR]

Purpose: To examine the prevalence, patterns, and correlates of prenatal substance use in the rural Appalachian state of West Virginia (WV). Methods: Population‐based cohort (Project WATCH) of all women (N = 34,309) who gave birth between February 2020 and June 2022. A composite substance use variable included 9 categories: "no substance use," "opioids," "cannabis," "sedatives/hypnotics," "stimulants," "opioids and cannabis," "opioids and stimulants," "cannabis and stimulants," and "opioids, cannabis, and stimulants." These data were gathered through self‐report, medical records, and/or positive drug screen at labor and delivery. Findings: 12.4% of women used one or more substances (opioids, cannabis, stimulants, and sedatives/hypnotics) during their current pregnancy. The mean age of women using cannabis was 25.34 (SD = 5.31), stimulants was 28.88 (SD = 5.62), and opioid was 30.19 (SD = 4.78). White women were more likely to use opioids (aOR = 2.19, 95% CI 1.46, 3.28) and less likely to use cannabis (aOR = 0.39, 95% CI 0.34, 0.44) compared to minority racial groups. Women with cannabis use were more likely to live in urban versus rural regions (aOR = 1.47, 95% CI 1.33, 1.62). The odds of using any type of substance(s) were significantly higher in women who smoked (aOR range 4.17‐30.85), had Medicaid (aOR range 1.52‐7.65), and those receiving inadequate prenatal care (aOR range 1.96‐16.83). Conclusions: In this rural Appalachian state, 1 in 8 women used 1 or more substances (opioids, cannabis, stimulants, and/or sedatives/hypnotics) during pregnancy and the type of substance used varied by sociodemographic and health‐related factors. These factors should inform state‐level strategies and initiatives to address the substance use crisis for this population. [ABSTRACT FROM AUTHOR]

Southern blight disease, caused by the fungal pathogen Athelia rolfsii, suppresses plant growth and reduces product yield in Cannabis sativa agriculture. Mechanisms of pathology of this soil‐borne disease remain poorly understood, with disease management strategies reliant upon broad‐spectrum antifungal use. Exposure to chitosan, a natural elicitor, has been proposed as an alternative method to control diverse fungal diseases in an eco‐friendly manner. In this study, C. sativa plants were grown in the Root‐TRAPR system, a transparent hydroponic growth device, where plant roots were primed with.2% colloidal chitosan prior to A. rolfsii inoculation. Both chitosan‐primed and unprimed inoculated plants displayed classical symptoms of wilting and yellowish leaves, indicating successful infection. Non‐primed infected plants showed increased shoot defense responses with doubling of peroxidase and chitinase activities. The levels of growth and defense hormones including auxin, cytokinin, and jasmonic acid were increased 2–5‐fold. In chitosan‐primed infected plants, shoot peroxidase activity and phytohormone levels were decreased 1.5–4‐fold relative to the unprimed infected plants. When compared with shoots, roots were less impacted by A. rolfsii infection, but the pathogen secreted cell wall‐degrading enzymes into the root‐growth solution. Chitosan priming inhibited root growth, with root lengths of chitosan‐primed plants approximately 65% shorter than the control, but activated root defense responses, with root peroxidase activity increased 2.7‐fold along with increased secretion of defense proteins. The results suggest that chitosan could be an alternative platform to manage southern blight disease in C. sativa cultivation; however, further optimization is required to maximize effectiveness of chitosan. [ABSTRACT FROM AUTHOR]

Cannabicitran is a cannabinoid found in levels up to ~10% in commercial "purified" cannabidiol (CBD) extracts. The structure of this natural product was first reported more than 50 years ago. However, few studies have investigated cannabicitran or its origin despite the rapidly increasing interest in the use of cannabinoids for the treatment of a wide range of physiological conditions. Following on a recent detailed NMR and computational characterization of cannabicitran, our group initiated ECD and TDDFT studies aimed at unequivocally determining the absolute configuration of cannabicitran present in Cannabis sativa extracts. To our surprise, we discovered the natural product was racemic, raising questions around its presumed enzymatic origin. Herein, we report the isolation and absolute configuration of (−)‐cannabicitran and (+)‐cannabicitran. Several possible scenarios for production of the racemate in the plant and/or during extract processing are discussed. [ABSTRACT FROM AUTHOR]

Background and Aims: The prevalence of cannabis use based on self‐reports is likely to be underestimated in population surveys, especially in contexts where its use is a criminal offence. Indirect survey methods ask sensitive questions ensuring that answers cannot be identified with an individual respondent, therefore potentially resulting in more reliable estimates. We aimed to measure whether the indirect survey method 'randomized response technique' (RRT) increased response rate and/or increased disclosure of cannabis use among young adults compared with a traditional survey. Design: We conducted two parallel nation‐wide surveys during the spring and the summer of 2021. The first survey was a traditional questionnaire‐based one (focusing on substance use and gambling). The second survey applied an indirect survey method known as 'the cross‐wise model' to questions related to cannabis use. The two surveys employed identical procedures (e.g. invitations, reminders and wording of the questions) Setting and Participants: The participants were young adults (aged 18–29 years) living in Sweden. The traditional survey had 1200 respondents (56.9% women) and the indirect survey had 2951 respondents (53.6% women). Measurements In both surveys, cannabis use was assessed according to three time‐frames: life‐time use; use during the past year; and use during the past 30 days. Findings The estimated prevalence of cannabis use was two‐ to threefold higher on all measures when estimated using the indirect survey method compared with the traditional survey: use during life‐time (43.2 versus 27.3%); during the past year (19.2 versus 10.4%); and during the past 30 days (13.2 versus 3.7%). The discrepancy was larger among males and individuals with an education shorter than 10 years, who were unemployed, and who were born in non‐European countries. Conclusions: Indirect survey methods may provide more accurate estimates than traditional surveys on prevalence of self‐reported cannabis use. [ABSTRACT FROM AUTHOR]

Aims: To test the effectiveness of a digital intervention to reduce cannabis use (ICan) with adherence‐focused guidance compared with educational cannabis information. Design: This was a single‐blind randomized controlled trial. Follow‐up clinical outcome measurements took place 3 and 6 months after randomization. Setting: The trial was conducted in the Netherlands. The intervention and guidance took place on‐line, with recruitment via Facebook/Instagram advertisement campaigns. Participants: Inclusion criteria were ≥ 18 years, cannabis use on ≥ 3 days/week, the desire to reduce/quit cannabis and using a smartphone. Participants were allocated to either ICan (n = 188) or control (n = 190) (69% male, mean age = 27.5 years). Intervention and comparator: ICan is a mobile (web‐)application based on motivational interviewing and cognitive behavioural therapy and includes three main components: screening, brief intervention (six modules) and referral to treatment. The control condition consisted of non‐interactive educational cannabis information. Measurements Primary outcome was the number of cannabis use days in the 7 days prior to the 6‐month follow‐up measurement. Secondary outcome measures at 3‐ and 6‐month follow‐up were the number of grams of cannabis used and attitudes towards seeking professional help for cannabis use related problems. Findings Intention‐to‐treat analysis showed that 6 months after randomization the mean number of cannabis use days in the past 7 days was reduced in both conditions (time P < 0.001), with no significant group × time interaction effect [ICan = 4.17 days, control = 4.31 days, Cohen's dbetween = 0.06, 95% confidence interval (CI) = −0.15, 0.26, P = 0.93]. Three months after randomization the mean number of grams used in the past 7 days was reduced in both conditions, with a significantly larger reduction in the ICan condition (P = 0.009, Cohen's dbetween = 0.15). At 6‐month follow‐up the significant group × time interaction effect was no longer present (P = 0.30). In both conditions, attitudes towards seeking professional help remained virtually unchanged over time. Conclusions: A digital intervention to reduce cannabis use (ICan) was more effective than non‐interactive educational cannabis information in reducing grams of cannabis used over 3 months, but not more effective at reducing cannabis use days at 6‐month follow‐up. Cannabis use reductions were maintained in both conditions between 3 and 6 months' follow‐up. [ABSTRACT FROM AUTHOR]

Context: The Person‐Centered Contraceptive Care measure (PCCC) evaluates patient experience of contraceptive counseling, a construct not represented within United States surveillance metrics of contraceptive care. We explore use of PCCC in a national probability sample and examine predictors of person‐centered contraceptive care. Methods: Among 2228 women from the 2017–2019 National Survey of Family Growth who reported receiving contraceptive care in the last year, we conducted univariate and multivariable linear regression to identify associations between individual characteristics and PCCC scores. Results: PCCC scores were high (x¯: 17.84, CI: 17.59–18.08 on a 4–20 scale), yet varied across characteristics. In adjusted analyses, Hispanic identity with Spanish language primacy and non‐Hispanic other or multiple racial identities were significantly associated with lower average PCCC scores compared to those of non‐Hispanic white identity (B = −1.232 [−1.970, −0.493]; B = −0.792 [−1.411, −0.173]). Gay, lesbian, or bisexual identity was associated with lower average PCCC scores compared to heterosexual (B = −0.673 [−1.243, −0.103]). PCCC scores had a positive association with incomes of 150%–299% and ≥300% of the federal poverty level compared to those of income <150% (150%–299%: B = 0.669 [0.198, 1.141]; ≥300%: B = 0.892 [0.412, 1.372]). Cannabis use in the past year was associated with lower PCCC scores (B = −0.542 [−0.971, −0.113]). Conclusions: The PCCC can capture differential experiences of contraceptive care to monitor patient experience and to motivate and track care quality over time. Differences in reported quality of care have implications for informing national priorities for contraceptive care improvements. [ABSTRACT FROM AUTHOR]

Studies suggest prenatal cannabis exposure is associated with mood/behavioral problems in children. However, it is unclear if targeting modifiable domains like sleep behaviors would improve outcomes in exposed youth. Using a causal inference framework, the effect of changing sleep‐hours on changing internalizing/externalizing problems in children was examined using the Adolescent Brain Cognitive Development™ study baseline (ages 9–10; collected during 2016–2018) and year‐1 follow‐up data (N = 9825; 4663 female; 5196 white). Average treatment effects (ATE) indicated that more sleep predicted less internalizing (ATE = −.34, SE =.08, p <.001) and externalizing (ATE = −.29, SE =.07, p <.001) problems over time. However, prenatal cannabis exposure moderated the ATE on internalizing (conditional‐ATE =.91, SE =.39, p =.019), whereby participants with exposure (n = 605) did not show any effect of changing sleep‐hours on mood (B =.09, SE =.24). [ABSTRACT FROM AUTHOR]

The 4‐ Aminophenol (4‐AP) colorimetric test is a fast, easy‐to‐use, and cost‐effective presumptive assay of cannabis plant material producing different chromophores with THC‐rich cannabis (blue color) and with CBD‐rich cannabis (pink color). The main drawback of the 4‐AP test is a brief observation window where the color rapidly changes to black, limiting the utility of the test. We now report for the first time, the identification of the product chromophores between 4‐AP and CBD/THC as well as propose an explanation and a solution for the color degradation of the chromophores. The identification of the chromophores is provided by spectroscopic (UV–Vis), chromatography, and mass spectrometry (TLC and LC‐QToF‐MS). Oxidation of excess 4‐AP (Reagent A) in the presence of NaOH (Reagent B) produces the black color observed for the previously reported 4‐AP tests and reported in the literature. The adjustment of reactants concentrations and volumes of 4‐AP:THC/CBD to a 1:1 ratio significantly reduces the black oxidation by‐product and increases the observation window up to 2 h instead of the previously reported 5–10 min. For the first time, mass spectrometry and chromatography confirmed that the reaction of THC and CBD with 4‐AP produced chromophores with m/z (M + H) = 420, consistent with proposed indophenol structures. The TLC method developed confirmed the separation between CBD and THC chromophores. The specificity of the test is also reported, showing false positive results for the presence of THC (blue color) for samples of thyme and oregano. LDA and SIMCA models showed that the optimized 4‐AP procedure performs better than the previously reported 4‐AP color test. [ABSTRACT FROM AUTHOR]

Background: Several personality traits predict future alcohol problems but also relate to demographic and substance‐related variables that themselves correlate with later adverse alcohol outcomes. Few prospective studies have evaluated whether personality measures predict alcohol problems after considering current demographic and substance‐related variables. Methods: Data from 414 drinkers without alcohol use disorder (AUD) from the Collaborative Study on the Genetics of Alcoholism (average age 20, 44% male) were followed over an average of 9 years. Time 1 (baseline) demography, AUD family history (FH), substance use and problems, and psychiatric histories were gathered using a standardized interview; the Level of Response (LR) to alcohol was measured by the Self‐Report of the Effects of alcohol (SRE) questionnaire; and seven personality dimensions were extracted from the NEO Five‐Factor Personality, Barratt, and Zuckerman scales. Analyses involved product–moment correlations of each baseline measure with the highest number of DSM‐IV AUD criteria endorsed in any follow‐up period, and hierarchical regression analyses evaluated whether the personality domains added significantly to the prediction of the outcome after adjusting for other baseline variables. Results: Significant correlations with the outcome were observed for baseline age, sex, length of follow‐up, AUD family history, past cannabis use, and all alcohol‐related baseline variables, including SRE‐based LR, but not prior mood or anxiety disorders. All personality characteristics except extraversion also correlated with outcomes. A hierarchical regression analysis that included all relevant personality scores together demonstrated significant contributions to the prediction of future alcohol problems for demographics in Step 1; demographics and most baseline alcohol items, including response level, in Step 2; and cannabis use in Step 3; after which demographics, LR, baseline alcohol problems, cannabis use, and higher sensation seeking added significantly in Step 4. Regression for each personality domain separately revealed significant contributions to Step 4 for all personality domains except openness. Lower levels of response to alcohol added significantly to all regression analyses. Conclusions: Most tested personality scores and lower levels of response to alcohol contributed to predictions of later alcohol problems even after considering baseline demographic and substance use measures. [ABSTRACT FROM AUTHOR]

Fungal pathogens pose a major threat to Cannabis sativa production, requiring safe and effective management procedures to control disease. Chitin and chitosan are natural molecules that elicit plant defense responses. Investigation of their effects on C. sativa will advance understanding of plant responses towards elicitors and provide a potential pathway to enhance plant resistance against diseases. Plants were grown in the in vitro Root‐TRAPR system and treated with colloidal chitin and chitosan. Plant morphology was monitored, then plant tissues and exudates were collected for enzymatic activity assays, phytohormone quantification, qPCR analysis and proteomics profiling. Chitosan treatments showed increased total chitinase activity and expression of pathogenesis‐related (PR) genes by 3–5 times in the root tissues. In the exudates, total peroxidase and chitinase activities and levels of defense proteins such as PR protein 1 and endochitinase 2 were increased. Shoot development was unaffected, but root development was inhibited after chitosan exposure. In contrast, chitin treatments had no significant impact on any defense parameters, including enzymatic activities, hormone quantities, gene expression levels and root secreted proteins. These results indicate that colloidal chitosan, significantly enhancing defense responses in C. sativa root system, could be used as a potential elicitor, particularly in hydroponic scenarios to manage crop diseases. [ABSTRACT FROM AUTHOR]

Cannabis sativa is cultivated for multiple uses including the production of cannabinoids. In developing improved production systems for high‐cannabinoid cultivars, scientists and cultivators must consider the optimization of complex and interacting sets of morphological, phenological, and biochemical traits, which have historically been shaped by natural and anthropogenic selection. Determining factors that modulate cannabinoid variation within and among genotypes is fundamental to developing efficient production systems and understanding the ecological significance of cannabinoids. Thirty‐two high‐cannabinoid hemp cultivars were characterized for traits including flowering date and shoot‐tip cannabinoid concentration. Additionally, a set of plant architecture traits, as well as wet, dry, and stripped inflorescence biomass were measured at harvest. One plant per plot was partitioned post‐harvest to quantify intra‐plant variation in inflorescence biomass production and cannabinoid concentration. Some cultivars showed intra‐plant variation in cannabinoid concentration, while many had a consistent concentration regardless of canopy position. There was both intra‐ and inter‐cultivar variation in architecture that correlated with intra‐plant distribution of inflorescence biomass, and concentration of cannabinoids sampled from various positions within a plant. These relationships among morphological and biochemical traits will inform future decisions by cultivators, regulators, and plant breeders. [ABSTRACT FROM AUTHOR]

An increased use of high‐potency cannabis products since cannabis legalization in the United States, Canada and elsewhere may increase cannabis‐related harm. Policymakers have good reasons for regulating more potent cannabis in ways that minimize harm, using approaches similar to those used to regulate alcohol; namely, banning the sale of high‐potency cannabis, setting a cap on tetrahydrocannabinol (THC) content and imposing higher rates of taxes on more potent cannabis products. Given the difficulty that US policymakers have had in regulating cannabis extracts and edibles, governments that are planning to legalize cannabis need to put policies on extracts into enabling legislation and evaluate the impact of these policies on cannabis use and cannabis‐related harms. [ABSTRACT FROM AUTHOR]

Projected revenues of cannabis concentrates and extracts in Canada will reach 5 billion dollars, of which infused products will account for half of the total. The pharmacologically active cannabinoids accumulate in the crop's flowers, accounting for as much as 30% of their dry mass, and are absent from the rest of the plant's body. To achieve a cost effective drug formulation requires optimizing cannabis processing techniques. Here, we review the pre‐treatment of Cannabis sativa L., its solvent extraction, and the isolation of its active metabolites. We describe traditional extraction processes such as maceration and percolation with organic solvents, but focus on recent green solvent and methods including supercritical fluid extraction (SCFE) and microwave‐ and ultrasound‐enhanced techniques. Furthermore, we report the decarboxylation kinetics to convert tetrahydrocannabinolic acid and cannabidiolic acid and purification‐isolation techniques to satisfy regulatory and consumer requirements. Cannabinoids decarboxylate in 10–60 min at 100–150°C. Ethanol and petroleum ether recover up to 90% of the neutral cannabinoids from plant inflorescences, but the crude extracts require further refining as the purity is less than 50%. Propane and butane compressed gas extraction facilitate solvent removal but introduce safety hazards related to flammability. SCFE is the safest solvent‐free extraction method with improved terpenoid recovery and >80% purity. Academic and commercial interest in the field is expected to accelerate in the next decade due to recent changes in regulatory schemes across North America, which will reduce legal and stigmatic barriers to research. [ABSTRACT FROM AUTHOR]

Peripheral nerve injuries are one of those complex medical conditions for which a highly effective first‐line treatment is currently missing. The use of natural compound as medicines to treat various disorders has a long history. Our previous research explored that crude Cannabis sativa L. accelerated the recovery of sensorimotor functions following nerve injury. The purpose of the current study was to investigate the effects of n‐Hexane and ethyl acetate extracts of C. sativa L. leaves on the muscle function restoration in a mouse model after sciatic nerve injury. For this purpose, albino mice (n = 18) were equally divided into control and two treatment groups. The control group was fed on a plain diet while treatment groups were given a diet having n‐Hexane (treatment 1) and ethyl acetate (treatment 2) extracts of C. sativa L. (10 mg/kg body weight), respectively. The hot plate test (M = 15.61, SD = 2.61, p =.001), grip strength (M = 68.32, SD = 3.22, p <.001), and sciatic functional index (SFI) (M = 11.59, SD = 6.54, p =.012) assessment indicated significant amelioration in treatment 1 as compared to treatment 2 group. Furthermore, muscle fiber cross‐sectional area revealed a noticeable improvement (M = 182,319, SD = 35.80, p =.013) in treatment 1 while muscle mass ratio of Gastrocnemius (M = 0.64, SD = 0.08, p =.427) and Tibialis anterior (M = 0.57, SD = 0.04, p =.209) indicated nonsignificant change. A prominent increase in total antioxidant capacity (TAC) (M = 3.76, SD = 0.38, p <.001) and momentous decrease in total oxidant status (TOS) (M = 11.28, SD = 5.71, p <.001) along with blood glucose level indicated significant difference (M = 105.5, SD = 9.12, p < 0.001) in treatment 1 group. These results suggest that treatment 1 has the ability to speed up functional recovery after a peripheral nerve lesion. Further research is necessary, nevertheless, to better understand the extract's actual curative properties and the mechanisms that improve functional restoration. [ABSTRACT FROM AUTHOR]

Cannabidiol (CBD), a major metabolite of Cannabis sativa, is popularized as a medicinal product, with potential for analgesic, antiinflammatory, and antioxidant effects. CBD may hold promise as a treatment in rheumatic diseases, but evidence to date remains preclinical. Preclinical effects on pain and inflammation is encouraging, but clinical study is lacking, with only a single study in knee osteoarthritis reporting a promising effect on symptoms. CBD products are freely available over the counter and marketed as food supplements or wellness products. The World Health Organization has identified pure CBD as safe and without abuse potential, but products are not subject to drug regulatory standards, leading to inconsistency in manufacturing practices and quality of products. Not only have molecular concentrations of CBD been identified as inaccurate, but concerns exist regarding contaminants, including heavy metals, pesticides, microbes, and mycotoxins, as well as added tetrahydrocannabinol. Drug‐drug interactions pose a potential risk due to metabolism via the cytochrome P450 enzyme pathway. Patients wishing to use CBD should obtain a product with certification of Good Manufacturing Practices, initiate treatment with a nighttime low dose, and have defined outcome goals within a reasonable time frame. Treatments should not be managed by nonmedical dispensary personnel. The hope that CBD may be a useful therapy must be substantiated by sound scientific study. [ABSTRACT FROM AUTHOR]

Cannabis sativa is a flowering plant belonging to the Cannabinaceae family. There have been numerous ongoing studies globally on C. sativa which include investigating the yield and quality of essential oils. However, this study is the first to assess the chemical composition and biological activities of Jamaican C. sativa essential oils (EOs) extracted via hydrodistillation as the plants mature from week 8 through to week 12. EOs from fresh landrace female plants were analysed by gas chromatography–mass spectrometry (GC–MS) and GC coupled to a flame ionization detector (GC‐FID). Cannabis sativa essential oils were screened for their in vitro antimicrobial activity using the disc diffusion method and further with tube dilution method. The antioxidant properties were investigated using the 2,2‐diphenyl‐1‐picrylhydrazyl (DPPH) radical scavenging assay. In total, 36 constituents were identified in the C. sativa EOs by comparison of the Kováts retention indices (RI), the mass spectra data with those in the Natural Institute of Standards and Technology (NIST) library and by co‐elution with authentic samples where available. The major constituents were β‐caryophyllene (25.34%) and α‐humulene (α‐caryophyllene) (10.94%) both at the highest levels in week nine and were the most abundant constituents present at all stages of maturity. All extracted C. sativa essential oils did not exhibit antioxidant properties. However, the C. sativa essential oils exhibit significant to moderate antimicrobial property against the test gram‐positive microorganisms, Enterococcus faecalis, Streptococcus Group A and Streptococcus Group B with MIC values ranging from 16 to 125 μg/mL. [ABSTRACT FROM AUTHOR]

Introduction: Risky sexual behavior has been explored in women living with HIV (WLHIV) internationally but is not well studied in WLHIV in the United States (U.S.). This merits further investigation due to the negative reproductive and HIV health outcomes associated with risky sexual behavior, such as the increased risk for HIV transmission and infertility from sexually transmitted infections (STIs). The aims of this study are to (1) describe sexual behaviors in a cohort of WLHIV in Florida, (2) determine whether demographic characteristics, substance use, and mental health symptoms are associated with risky sexual behavior in a cohort of WLHIV in Florida, and (3) explore whether the relationship between substance use and mental health symptoms and risky sexual behavior differs in reproductive‐age (age 18–49), compared to non‐reproductive‐age WLHIV (age 50+). Design: This was a cross‐sectional analysis of data from a multisite cohort study done in Florida. Methods: Data were collected from a sample of 304 participants who were recruited into the Florida Cohort Study from 9 clinical and community sites in Florida between 2014 to 2017. The predictor variables of interest were mental health symptoms, substance use, and demographic variables. The outcome variable of interest was risky sexual behavior which was defined as reporting ≥1 of the following: (1) at least one STI diagnosis in the past 12 months, (2) two or more sexual partners in the past 12 months, or (3) any inconsistent condom use in the past 12 months. Descriptive statistics, bivariate analysis, and logistic regression (p < 0.1) were conducted on the variables of interest. Results: The mean age of the sample was 47.8 years, and approximately half (51.6%) of the sample was of reproductive‐age. Reporting ≥1 risky sexual behavior was reported in over half (51.6%) of the reproductive‐age WLHIV in the sample and 32% of the non‐reproductive‐age WLHIV in the sample. Binge drinking, alcohol‐related problems, marijuana use, and age were all significantly associated with self‐reporting ≥1 risky sexual behaviors in all WLHIV. Self‐reporting binge drinking, marijuana use, and a high alcohol‐related problems score respectively were associated with increased odds of self‐reporting ≥1 risky sexual behavior in all WLHIV. Neither mental health symptoms nor race/ethnicity or education were significantly associated with self‐reporting ≥1 risky sexual behavior in all WLHIV. Self‐reporting severe anxiety symptoms and high alcohol‐related problems scores respectively were associated with increased odds of self‐reporting ≥1 risky sexual behavior only in reproductive‐age WLHIV from the sample. Conclusion: Marijuana use, binge drinking, and alcohol‐related problems appear to have a relationship with risky sexual behavior in WLHIV regardless of age. Reproductive‐age also appears to influence risky sexual behavior in WLHIV, and specific reporting severe anxiety symptoms and high alcohol‐related problems in reproductive‐age WLHIV increases the odds of engaging in risky sexual behavior. Clinical Significance: This study holds clinical significance for nurses and other clinicians working in reproductive health settings and clinics with WLHIV. Results indicate that it could be beneficial to do more screening for mental health symptoms (particularly anxiety) and alcohol use in younger reproductive‐age WLHIV. [ABSTRACT FROM AUTHOR]

Background: Cannabis use is increasing among Andalusian adolescents, causing health, social and financial problems. School nurses visit schools and provide health promotion to adolescents in Andalusia. In order to better tailor health promotion programs, it is important to understand the sociodemographic and motivational factors related to cannabis use in Andalusian adolescents. Design/Methods: In this cross‐sectional study, 369 students (aged 15–18 years) from secondary schools in Andalusia were involved. An anonymous questionnaire based on the I‐Change Model was self‐administered during school hours. Cannabis users were compared with non‐cannabis users regarding sociodemographic and motivational factors. Contingency tables, mean comparison tests, and logistic regression analyses were conducted. Results: The prevalence of cannabis use in the last year was 21.6%. Non‐cannabis users had a few positive beliefs toward cannabis use (e.g. the ability to relax or medical benefits), as well as users. Users recognized some disadvantages of cannabis use but played down their importance and mentioned more advantages. Moreover, social influence, especially from peers, plays a critical role in cannabis use. Specific social situations and moods seemed to be special risk factors for cannabis use, such as being at a celebration or feeling good. Results of regression analysis showed that cannabis use is mainly associated with age, low family function, low family affluence, high pocket money, perceiving few disadvantages of cannabis use, much social modeling of cannabis use, social norm and pressure favoring cannabis, low self‐efficacy to resist using cannabis and positive intentions to use cannabis. Conclusions: Based on our results, prevention programmes lead by nurses can be tailored to the factors important to prevent cannabis use, focusing on outlining the disadvantages of cannabis use, alternatives for using cannabis when feeling good, increasing salience of healthy social influences and reinforcing self‐efficacy to resist temptations to use cannabis are recommended. Clinical Relevance: Nurses need to know the sociodemographic factors and motivations associated with the use of cannabis in adolescents in order to establish effective preventive interventions at school. [ABSTRACT FROM AUTHOR]

Summary: Background: Although the association between prenatal tobacco exposure and child obesity risk is well‐established, less is known about co‐exposure to tobacco and cannabis. Objective: Determine the relation between prenatal substance co‐exposure and obesity risk. Methods: In a diverse sample of pregnant women, we examined the association between prenatal substance exposure (tobacco‐only and co‐exposure) and child BMI (kg/m2) trajectories from birth to mid‐childhood (n = 262), overweight/obese status based on BMI percentiles from toddlerhood (24 months) to mid‐childhood (9–12 years), and adiposity outcomes at mid‐childhood (fat mass [kg], fat mass [%] and fat free mass [kg]; n = 128). Given that the major goal of this study was to examine the associations between prenatal substance exposure and child outcomes, we oversampled pregnant women for substance use (with tobacco as the primary focus). Results: Multilevel models demonstrated that children in both exposure groups had a steeper increase in BMI trajectory from birth to mid‐childhood and among co‐exposed children, girls had a steeper increase than boys. Odds ratio of having obesity by mid‐childhood was 12 times higher among those co‐exposed than non‐exposed. Co‐exposure led to significantly greater fat mass and fat mass % compared with no exposure, but exposure to only tobacco was no different than no exposure. Conclusions: Results highlight potentiating effects of cannabis exposure in the context of maternal tobacco use in pregnancy on obesity risk and the importance of multi‐method assessments of obesity. [ABSTRACT FROM AUTHOR]

Background and Aims: Excessive cannabis use may lead to lower educational attainment. However, this association may be due to confounders and reverse causality. We tested the potential causal relationship between cannabis use disorder (CUD) or life‐time cannabis use (LCU) and educational attainment. Design: Bidirectional two‐sample Mendelian randomization (MR) study was conducted. Our primary method was inverse‐variance weighted (IVW) MR, with a series of sensitivity analyses. Multivariable MR (MVMR) was performed to estimate any direct effect independent of intelligence, smoking initiation or attention deficit hyperactivity disorder (ADHD). Setting and participants: European ancestry individuals. The sample sizes of the genome‐wide association study ranged from 55 374 to 632 802 participants. Measurements Genetic variants of CUD, LCU or educational attainment. Findings Using univariable MR, we found evidence of a potential causal effect of genetic liability to CUD on a lower educational attainment [MR, 95% confidence interval (CI)inverse variance weighted (IVW) = −1.2 month (−1.9 month, −0.5 month); P = 0.0008]. However, we found no evidence of an effect of genetic liability to LCU on educational attainment [MR, 95% CIIVW = 0.5 month (−1.5 month, 2.6 month), P = 0.6032]. Reverse direction analysis suggested that genetic liability to higher educational attainment had a potential causal effect on lower risk of CUD [odds ratio (OR), 95% CIIVW = 0.39 (0.29, 0.52), P = 1.69 × 10−10]. We also found evidence of potential causal effect from genetic liability to higher educational attainment to higher risk of LCU [OR, 95% CIIVW = 1.35 (1.11, 1.66), P = 0.0033]. Conclusions: Genetic liability to cannabis use disorder may lead to lower educational attainment. Genetic liability to higher educational attainment may also lead to higher life‐time cannabis use risk and lower cannabis use disorder risk. However, the bidirectional effect between cannabis use disorder and educational attainment may be due to shared risk factors (e.g. attention‐deficit hyperactivity disorder). [ABSTRACT FROM AUTHOR]

Background and aims: The Marijuana Purchase Task (MPT) is increasingly used to measure cannabis reinforcing value and has potential use for cannabis etiological and regulatory research. This meta‐analysis sought to evaluate for the first time the MPT's concurrent validity in relation to cannabis involvement. Methods: Electronic databases and pre‐print repositories were searched for MPT studies that examined the cross‐sectional relationship between frequency and quantity of cannabis use, problems, dependence, and five MPT indicators: intensity (i.e. unrestricted consumption), Omax (i.e. maximum consumption), Pmax (i.e. price at which demand becomes elastic), breakpoint (i.e. first price at which consumption ceases), and elasticity (i.e. sensitivity to rising costs). Random effects meta‐analyses of cross‐sectional effect sizes were conducted, with Q tests for examining differences by cannabis variables, meta‐regression to test quantitative moderators, and publication bias assessment. Moderators included sex, number of MPT prices, variable transformations, and year of publication. Populations included community and clinical samples. Results: The searches yielded 14 studies (n = 4077, median % females: 44.8%: weighted average age = 29.08 [SD = 6.82]), published between 2015 and 2022. Intensity, Omax, and elasticity showed the most robust concurrent validity (|r's| = 0.147–325, ps < 0.014) with the largest significant effect sizes for quantity (|r| intensity = 0.325) and cannabis dependence (|r| Omax = 0.320, |r| intensity = 0.305, |r| elasticity = 0.303). Higher proportion of males was associated with increased estimates for elasticity‐quantity and Pmax‐problems. Higher number of MPT prices significantly altered magnitude of effects sizes for Pmax and problems, suggesting biased estimations if excessively low prices are considered. Methodological quality was generally good, and minimal evidence of publication bias was observed. Conclusions: The marijuana purchase task presents adequate concurrent validity to measure cannabis demand, most robustly for intensity, Omax, and elasticity. Moderating effects by sex suggest potentially meaningful sex differences in the reinforcing value of cannabis. [ABSTRACT FROM AUTHOR]

Background and aims: Mixed results have been reported on the association between prenatal cannabis exposure and preterm birth. This study aimed to examine the magnitude and consistency of associations reported between prenatal cannabis exposure and preterm birth. Methods: This review was guided by the Preferred Reporting Items for Systematic Review and Meta‐Analysis (PRISMA) guidelines. We performed a comprehensive search of the literature on the following electronic databases: PubMed, EMBASE, SCOPUS, Psych‐INFO and Web of Science. The revised version of the Newcastle–Ottawa Scale (NOS) was used to appraise the methodological quality of the studies included in this review. Inverse variance weighted random‐effects cumulative meta‐analysis was undertaken to pool adjusted odds ratios (aOR) after sequential inclusion of each newly published study over time. The OR and 95% confidence interval (CI) limits required (stability threshold) for a new study to move the cumulative odds ratio to the null were also computed. Results: A total of 27 observational studies published between 1986 and 2022 were included in the final cumulative meta‐analysis. The sample size of the studies ranged from 304 to 4.83 million births. Prenatal cannabis exposure was associated with an increased risk of preterm birth (pooled aOR = 1.35, 95% CI = 1.24–1.48). The stability threshold was 0.74 (95% CI limit = 0.81) by the end of 2022. Conclusions: Offspring exposed to maternal prenatal cannabis use was associated with higher risk of preterm birth, which warrants public health messages to avoid such exposure, particularly during pregnancy. [ABSTRACT FROM AUTHOR]

Summary: This study aims to characterise the seeds of two varieties (Beldia and Critical) of hemp grown in four geographical areas of northern Morocco regarding their phenolic compounds and antioxidant power. Thirty‐three phenolic compounds were identified using the HPLC‐DAD/ESI‐MS2 technique. The phenolic profiles of hemp seeds of all varieties from all regions were characterised by their richness in N‐trans‐caffeoyltyramine (390.22–721.41 μg g−1), cannabisin A (217.96–393.37 μg CTE g−1) and cannabisin B (195.25–331.28 μg CTE g−1). The antioxidant activities (expressed as IC50 and EC50 values) were 1.83–4.14, 1.64–4.37, 2.45–6.02, 2.65–9.29 and 1.75–4.37 mg mL−1 of extract for the TAC, DPPH, ABTS, CUPRAC and FRAP tests respectively. A two‐way analysis of variance showed that phenolic compounds' content was mainly related to the geographical location and its interaction with the genotype factor. Multivariate analysis showed that hemp seeds from the Jebha and Galaz regions were characterised by a high level of phenolic compounds and a potent antioxidant activity compared to Tamorot and Ratba regions. This characterisation constitutes an interesting database for breeders to create new varieties that meet fluctuating expectations of the cannabis industry. [ABSTRACT FROM AUTHOR]