Feature-Based Molecular Network for New Psychoactive Substance Identification: The Case of Synthetic Cannabinoids in a Seized e-Liquid and Biological Samples.

The comprehensive detection of new psychoactive substances, including synthetic cannabinoids along with their associated metabolites in biological samples, remains an analytical challenge. To detect these chemicals, untargeted approaches using appropriate bioinformatic tools such as molecular networks are useful, albeit it necessitates as a prerequisite the identification of a node of interest within the cluster. To illustrate it, we reported in this study the identification of synthetic cannabinoids and some of their metabolites in seized e-liquid, urine, and hair collected from an 18-year-old poisoned patient hospitalized for neuropsychiatric disorders. A comprehensive analysis of the seized e-liquid was performed using gas chromatography coupled with electron ionization mass spectrometry, 1H NMR, and liquid chromatography coupled with high resolution tandem mass spectrometry combined with data processing based on molecular network strategy. It allowed researchers to detect in the e-liquid known synthetic cannabinoids including MDMB-4en-PINACA, EDMB-4en-PINACA, MMB-4en-PINACA, and MDMB-5F-PICA. Compounds corresponding to transesterification of MDMB-4en-PINACA with pentenol, glycerol, and propylene glycol were also identified. Regarding the urine sample of the patient, metabolites of MDMB-4en-PINACA were detected, including MDMB-4en-PINACA butanoic acid, dihydroxylated MDMB-4en-PINACA butanoic acid, and glucurono-conjugated MDMB-4en-PINACA butanoic acid. Hair analysis of the patient allowed the detection of MDMB-4en-PINACA and MDMB-5F-PICA in the two investigated hair segments. This untargeted analysis of seized materials and biological samples demonstrates the utility of the molecular network strategy in identifying closely related compounds and metabolites of synthetic cannabinoids. It also emphasizes the need for developing strategies to anchor molecular networks, especially for new psychoactive substances.

Trends in poisoning associated with the use of insecticides for bed bug infestations: a 20-year retrospective study in France.

Bed bugs are pervasive global pests that have reemerged in the last 20 years as a significant public health concern, especially in densely populated urban areas. Beyond financial losses, expenses, inconvenience, and psychological distress, bed bug infestations often necessitate chemical management, posing poisoning risks to those with an infestation. The French Poison Control Centers recorded 1056 cases of exposure to bed bug insecticide products between 1999 and 2021. This study followed cases over 2007-2021, with a notable surge in reports of adverse reactions from 2016 onwards. Data revealed an increased recurrent misuse of insecticides, including substances banned or not approved for this use. Our findings underscore the growing public reliance on chemical insecticides for home bed bug management. With this is the concern of increased poisoning risks, and potential long-term health consequences from non-professional efforts by the public to manage bed bugs in their homes. This escalating trend emphasizes the need for safer and more sustainable pest management strategies in urban environments.

Inadequate intensive care physician supply in France: a point-prevalence prospective study.

BACKGROUND: The COVID-19 pandemic has highlighted the importance of intensive care units (ICUs) and their organization in healthcare systems. However, ICU capacity and availability are ongoing concerns beyond the pandemic, particularly due to an aging population and increasing complexity of care. This study aimed to assess the current and future shortage of ICU physicians in France, ten years after a previous evaluation. A national e-survey was conducted among French ICUs in January 2022 to collect data on ICU characteristics, medical staffing, individual physician characteristics, and education and training capacities. RESULTS: Among 290 ICUs contacted, 242 responded (response rate: 83%), representing 4943 ICU beds. The survey revealed an overall of 300 full time equivalent (FTE) ICU physician vacancies in the country. Nearly two-thirds of the participating ICUs reported at least one physician vacancy and 35% relied on traveling physicians to cover shifts. The ICUs most affected by physician vacancies were the ICUs of non-university affiliated public hospitals. The retirements expected in the next five years represented around 10% of the workforce. The median number of physicians per ICU was 7.0, corresponding to a ratio of 0.36 physician (FTE) per ICU bed. In addition, 27% of ICUs were at risk of critical dysfunction or closure due to vacancies and impending retirements. CONCLUSION: The findings highlight the urgent need to address the shortage of ICU physicians in France. Compared to a similar study conducted in 2012, the inadequacy between ICU physician supply and demand has increased, resulting in a higher number of vacancies. Our study suggests that, among others, increasing the number of ICM residents trained each year could be a crucial step in addressing this issue. Failure to take appropriate measures may lead to further closures of ICUs and increased risks to patients in this healthcare system.

Severe morel mushroom poisonings in France - a nationwide French poison centres study 2010-2020.

INTRODUCTION: In 2023, two fatalities attributed to the ingestion of uncooked morels (Morchella spp.) were reported in the United States; both patients developed severe gastrointestinal symptoms. Morel-induced gastrointestinal toxicity is well recognized, but no deaths had been reported until 2023, suggesting a potential shift in the severity of morel poisoning. METHODS: Using the Poisoning Severity Score, we analyzed the severity of symptomatic cases of morel ingestion recorded in the French National Database of Poisonings from 2010 to 2020. RESULTS: We found 446 cases of exposure in which morels were the sole mushroom species involved. Of these, 83.6 per cent and 53.3 per cent developed gastrointestinal and neurological symptoms, respectively. Eight patients developed shock attributed to severe gastrointestinal symptoms, resulting in two deaths. DISCUSSION: Morel ingestion can lead to severe complications. As in the United States, the deaths reported in this study were attributed to imported cultivated morels. The shift, since 2006, towards a predominance of cultivated over wild morel sales may have played a role in the reporting of severe cases of morel poisoning. CONCLUSIONS: Reports of severe morel poisoning highlight the need for cautious consumption, particularly of raw or undercooked preparations. Emerging complications signal potential changes in toxicity. Surveillance and awareness are key to reducing the risks of consuming morels.

CARECOS study: Medical students' empathy as assessed with the CARE measure by examiners versus standardized patients during a formative Objective and Structured Clinical Examination (OSCE) station.

PURPOSE: To assess the Consultation And Relational Empathy (CARE) measure as a tool for examiners to assess medical students' empathy during Objective and Structured Clinical Examinations (OSCEs), as the best tool for assessing empathy during OSCEs remains unknown. METHODS: We first assessed the psychometric properties of the CARE measure, completed simultaneously by examiners and standardized patients (SP, either teachers - SPteacher - or civil society members - SPcivil society), for each student, at the end of an OSCE station. We then assessed the qualitative/quantitative agreement between examiners and SP. RESULTS: We included 129 students, distributed in eight groups, four groups for each SP type. The CARE measure showed satisfactory psychometric properties in the context of the study but moderate, and even poor inter-rater reliability for some items. Considering paired observations, examiners scored lower than SPs (p < 0.001) regardless of the SP type. However, the difference in score was greater when the SP was a SPteacher rather than a SPcivil society (p < 0.01). CONCLUSION: Despite acceptable psychometric properties, inter-rater reliability of the CARE measure between examiners and SP was unsatisfactory. The choice of examiner as well as the type of SP seems critical to ensure a fair measure of empathy during OSCEs.

Brain PET imaging using 11C-flumazenil and 11C-buprenorphine does not support the hypothesis of a mutual interaction between buprenorphine and benzodiazepines at the neuroreceptor level.

Among opioids, buprenorphine presents a favorable safety profile with a limited risk of respiratory depression. However, fatalities have been reported when buprenorphine is combined to a benzodiazepine. Potentiation of buprenorphine interaction with opioid receptors (ORs) with benzodiazepines, and/or vice versa, is hypothesized to explain this drug-drug interaction (DDI). The mutual DDI between buprenorphine and benzodiazepines was investigated at the neuroreceptor level in nonhuman primates (n = 4 individuals) using brain PET imaging and kinetic modelling. The binding potential (BPND) of benzodiazepine receptor (BzR) was assessed using 11C-flumazenil PET imaging before and after administration of buprenorphine (0.2 mg, i.v.). Moreover, the brain kinetics and receptor binding of buprenorphine were investigated in the same individuals using 11C-buprenorphine PET imaging before and after administration of diazepam (10 mg, i.v.). Outcome parameters were compared using a two-way ANOVA. Buprenorphine did not impact the plasma nor brain kinetics of 11C-flumazenil. 11C-flumazenil BPND was unchanged following buprenorphine exposure, in any brain region (p > 0.05). Similarly, diazepam did not impact the plasma or brain kinetics of 11C-buprenorphine. 11C-buprenorphine volume of distribution (VT) was unchanged following diazepam exposure, in any brain region (p > 0.05). To conclude, our PET imaging findings do not support a neuropharmacokinetic or neuroreceptor-related mechanism of the buprenorphine/benzodiazepine interaction.

Short message service as a tool for mass follow-up of patients requesting a poison centre: a retrospective comparative study in France.

INTRODUCTION: The short message service is an alternative to telephone follow-up of exposure cases reported to poison centres. The aim of this study was to compare the proportion of exposure cases successfully followed up and the respective cost of telephone and short message service follow-up between two poison centres, one using both methods of follow-up (Paris centre) and the other using telephone follow-up only (Nancy centre). METHODS: In 2021, we included cases eligible for short message service follow-up at both centres. Eligibility criteria were calls from the public reporting non-toxic or minor toxic exposure not requiring medical consultation. We collected the follow-up type (telephone/short message service) and outcome (success/failure). The cost of each type of follow-up was estimated. RESULTS: In 2021, 16,867 and 11,107 exposure cases were eligible for short message service follow-up at the Paris and Nancy centres, respectively. The Paris centre followed up 86.2 per cent of cases by short message service, and the remainder by telephone, while the Nancy centre followed up all cases by telephone. The Paris centre had a greater follow-up rate compared to the Nancy centre (93.0 per cent versus 43.6 per cent; P < 0.0001). Overall, the success rates were similar between the two centres (P = 0.06), with short message service and telephone follow-up showing comparable success rates (88.1 per cent versus 88.7 per cent; P = 0.25). On average, telephone follow-up took almost twice as long (1.51 min versus 0.85 min) and cost 1.3 times more (0.59 euros versus 0.45 euros) than short message service follow-up. DISCUSSION: Short message service follow-up allows more patients to be successfully followed up at a lower cost compared to telephone-only follow-up, albeit with potential differences in information quality. CONCLUSIONS: Short message service follow-up is a promising tool for poison centres to follow up with patients. Further studies are needed to assess the quality of the data collected and caller satisfaction.

Parametric Imaging of P-Glycoprotein Function at the Blood-Brain Barrier Using kE,brain-maps Generated from [11C]Metoclopramide PET Data in Rats, Nonhuman Primates and Humans.

PURPOSE: PET imaging using [11C]metoclopramide revealed the importance of P-glycoprotein (P-gp, ABCB1) in mediating the brain-to-blood efflux of substrates across the blood-brain barrier (BBB). In this work, the elimination rate constant from the brain (kE,brain), calculated from dynamic PET images without the need for arterial blood sampling, was evaluated as an outcome parameter for the interpretation of [11C]metoclopramide PET data. PROCEDURES: kE,brain parameter was obtained by linear regression of log-transformed brain time-activity curves (TACs). kE,brain values (h-1) obtained under baseline conditions were compared with values obtained after complete P-gp inhibition using tariquidar in rats (n = 4) and baboons (n = 4) or after partial inhibition using cyclosporine A in humans (n = 10). In baboons, the sensitivity of kE,brain to measure complete P-gp inhibition was compared with outcome parameters derived from kinetic modeling using a 1-tissue compartment model (1-TCM). Finally, kE,brain-maps were generated in each species using PMOD software. RESULTS: The linear part of the log-transformed brain TACs occurred from 10 to 30 min after radiotracer injection in rats, from 15 to 60 min in baboons, and from 20 to 60 min in humans. P-gp inhibition significantly decreased kE,brain values by 39 ± 12% in rats (p < 0.01), by 32 ± 6% in baboons (p < 0.001), and by 37 ± 22% in humans (p < 0.001). In baboons, P-gp inhibition consistently decreased the brain-to-plasma efflux rate constant k2 (36 ± 9%, p < 0.01) leading to an increase in the total brain volume of distribution (VT, 101 ± 12%, p < 0.001). In all studied species, brain kE,brain-maps displayed decreased P-gp-mediated efflux across the BBB. CONCLUSIONS: kE,brain of [11C]metoclopramide provides a simple outcome parameter to describe P-gp function in the living brain when arterial input function data are unavailable, although less sensitive than VT. kE,brain-maps represent easy to compute parametric images reflecting the effect of P-gp on [11C]metoclopramide elimination from the brain.

Trends in adverse drug reactions related to oral weak opioid analgesics in therapeutic use in adults: A 10-year French vigilances retrospective study.

AIM: To describe the symptoms, patient demographics, and trends over time of adverse drug reactions (ADRs) related to weak opioid analgesics reported to the French vigilance networks. METHODS: Retrospective study of data from French Poison Control Centers and Pharmacovigilance Centers databases of weak opioid analgesics-related ADRs cases, with high causality score, in adults, in therapeutic analgesic use, without co-exposure, between 2011 and 2020. RESULTS: The number of cases was 388 in the Poisonings database and 155 in the Pharmacovigilance database; ratio of the number of these cases to all reported cases during the study period was 0.02% and 0.03%, respectively. Tramadol was most often involved (74% and 56.1%, respectively), followed by codeine (26% and 38.7%, respectively). There was no significant variation in the number of cases reported. Cases most often involved young adults (median age: 40 years) and mostly women (76%). Gastrointestinal symptoms were mostly reported (80% and 65%, respectively) as described in the Summary of Products Characteristics. Patterns of ADRs were comparable in both databases, except for codeine-associated acute pancreatitis and anaphylaxis that were reported in the Pharmacovigilance database. No fatality was observed. Severity was more often observed in the Pharmacovigilance database (30%) than in the Poisonings database (moderate toxicity: 7%). CONCLUSION: ADRs mostly occurred among young women using tramadol, without significant variation in the number of reported cases over time. Serious ADRs were more frequently reported to the Pharmacovigilance database, particularly for codeine. Women seemed to be at greater risk of ADRs.

Simulation training in suicide risk assessment and intervention: a systematic review and meta-analysis.

PURPOSE: Suicide is a major cause of preventable death worldwide. Adequate training in risk assessment and intervention is key to suicide prevention. The use of simulation (role plays, simulated patients, virtual reality…) for practical training is a promising tool in mental health. The purpose of this study was to assess the effectiveness of simulation training in suicide risk assessment and intervention for healthcare professionals and gatekeepers. METHODS: We conducted a systematic review in Medline and PsycINFO up to 31 July 2021 of randomized controlled trials (RCTs), non-randomized controlled trials, and pre/post-test studies. RCTs were furthermore included in a meta-analysis. We assessed the methodological quality of all studies with the Medical Education Research Study Quality Instrument, and the Cochrane Risk of Bias tool 2.0 for RCTs. Primary outcomes were changes in Kirkpatrick criteria: attitudes, skills, knowledge, behaviors, and patient outcomes. RESULTS: We included 96 articles representing 43,656 participants. Most pre/post-test (n = 65) and non-randomized controlled (n = 14) studies showed significant improvement in attitudes, skills, knowledge, and behaviors. The meta-analysis of 11 RCTs showed positive changes in attitudes immediately after training and at 2-4 months post-training; in self-perceived skills at 6 months post-training; but not in factual knowledge. Studies assessing benefits for patients are still limited. CONCLUSIONS: The heterogeneity of methodological designs, interventions, and trained populations combined with a limited number of RCTs and studies on patients' outcomes limit the strength of the evidence. However, preliminary findings suggest that simulation is promising for practical training in suicidal crisis intervention and should be further studied.

Cyclopeptide mushroom poisoning: A retrospective series of 204 patients.

Cyclopeptide mushroom poisoning is responsible for 90%-95% of deaths from macrofungi ingestion. The main objectives of this study are to describe cases of cyclopeptide mushroom poisoning and to determine risk factors that may influence the severity/mortality of poisoned patients. We included all cases of amatoxin toxicity reported to two French Poison Centers from 2013 through 2019. We compared the severity with the Poison Severity Score (PSS) and the outcomes of patients using simple logistic regression and multinomial logistic regression. We included 204 cases of amatoxin toxicity. More than three-quarters developed an increase in AST and/or ALT (78.1%), and over half developed a decrease in prothrombin ratio (<70%: 53%) and/or Factor V (<70%: 54%). One-third developed an acute renal injury (AKI). Twelve patients (5.9%) developed post-poisoning sequelae (persistent kidney injury more than 1 month after ingestion and liver transplant). Five patients (2.5%) received a liver transplant, and nine died (4.4%). The mean time to onset of digestive disorders was shorter in PSS2 and PSS3-4 patients (10.9 ± 3.9/11.3 ± 6.3 h) than in PSS1 patients (14 ± 6.5 h; p < 0.05). Patients who died or developed post-poisoning sequelae had more frequent cardiovascular comorbidities compared with recovered patients (60.0% versus 29.5%; p < 0.01).

Investigation of the Mechanisms of Tramadol-Induced Seizures in Overdose in the Rat.

Tramadol overdose is frequently associated with the onset of seizures, usually considered as serotonin syndrome manifestations. Recently, the serotoninergic mechanism of tramadol-attributed seizures has been questioned. This study's aim was to identify the mechanisms involved in tramadol-induced seizures in overdose in rats. The investigations included (1) the effects of specific pretreatments on tramadol-induced seizure onset and brain monoamine concentrations, (2) the interaction between tramadol and γ-aminobutyric acid (GABA)A receptors in vivo in the brain using positron emission tomography (PET) imaging and 11C-flumazenil. Diazepam abolished tramadol-induced seizures, in contrast to naloxone, cyproheptadine and fexofenadine pretreatments. Despite seizure abolishment, diazepam significantly enhanced tramadol-induced increase in the brain serotonin (p < 0.01), histamine (p < 0.01), dopamine (p < 0.05) and norepinephrine (p < 0.05). No displacement of 11C-flumazenil brain kinetics was observed following tramadol administration in contrast to diazepam, suggesting that the observed interaction was not related to a competitive mechanism between tramadol and flumazenil at the benzodiazepine-binding site. Our findings do not support the involvement of serotoninergic, histaminergic, dopaminergic, norepinephrine or opioidergic pathways in tramadol-induced seizures in overdose, but they strongly suggest a tramadol-induced allosteric change of the benzodiazepine-binding site of GABAA receptors. Management of tramadol-poisoned patients should take into account that tramadol-induced seizures are mainly related to a GABAergic pathway.

Temporal trends in calls for suicide attempts to poison control centers in France during the COVID-19 pandemic: a nationwide study.

Concerns have been raised about early vs. later impacts of the COVID-19 pandemic on suicidal behavior. However, data remain sparse to date. We investigated all calls for intentional drug or other toxic ingestions to the eight Poison Control Centers in France between 1st January 2018 and 31st May 2022. Data were extracted from the French National Database of Poisonings. Calls during the study period were analyzed using time trends and time series analyses with SARIMA models (based on the first two years). Breakpoints were determined using Chow test. These analyses were performed together with examination of age groups (≤ 11, 12-24, 25-64, ≥ 65 years) and gender effects when possible. Over the studied period, 66,589 calls for suicide attempts were received. Overall, there was a downward trend from 2018, which slowed down in October 2019 and was followed by an increase from November 2020. Number of calls observed during the COVID period were above what was expected. However, important differences were found according to age and gender. The increase in calls from mid-2020 was particularly observed in young females, while middle-aged adults showed a persisting decrease. An increase in older-aged people was observed from mid-2019 and persisted during the pandemic. The pandemic may therefore have exacerbated a pre-existing fragile situation in adolescents and old-aged people. This study emphasizes the rapidly evolving situation regarding suicidal behaviour during the pandemic, the possibility of age and gender differences in impact, and the value of having access to real-time information to monitor suicidal acts.

Chronic critical illness and post-intensive care syndrome: from pathophysiology to clinical challenges.

BACKGROUND: Post-intensive care syndrome (PICS) encompasses physical, cognition, and mental impairments persisting after intensive care unit (ICU) discharge. Ultimately it significantly impacts the long-term prognosis, both in functional outcomes and survival. Thus, survivors often develop permanent disabilities, consume a lot of healthcare resources, and may experience prolonged suffering. This review aims to present the multiple facets of the PICS, decipher its underlying mechanisms, and highlight future research directions. MAIN TEXT: This review abridges the translational data underlying the multiple facets of chronic critical illness (CCI) and PICS. We focus first on ICU-acquired weakness, a syndrome characterized by impaired contractility, muscle wasting, and persisting muscle atrophy during the recovery phase, which involves anabolic resistance, impaired capacity of regeneration, mitochondrial dysfunction, and abnormalities in calcium homeostasis. Second, we discuss the clinical relevance of post-ICU cognitive impairment and neuropsychological disability, its association with delirium during the ICU stay, and the putative role of low-grade long-lasting inflammation. Third, we describe the profound and persistent qualitative and quantitative alteration of the innate and adaptive response. Fourth, we discuss the biological mechanisms of the progression from acute to chronic kidney injury, opening the field for renoprotective strategies. Fifth, we report long-lasting pulmonary consequences of ARDS and prolonged mechanical ventilation. Finally, we discuss several specificities in children, including the influence of the child's pre-ICU condition, development, and maturation. CONCLUSIONS: Recent understandings of the biological substratum of the PICS' distinct features highlight the need to rethink our patient trajectories in the long term. A better knowledge of this syndrome and precipitating factors is necessary to develop protocols and strategies to alleviate the CCI and PICS and ultimately improve patient recovery.

Importance des réseaux sociaux dans l'origine des intoxications : à propos d'un cas d'empoisonnement par la paraphénylènediamine.

Une femme de 63 ans rapporte avoir acheté une « pierre noire ¼ pour se protéger de la Covid-19 à la suite de conseils trouvés sur des réseaux sociaux. Dans les 24 heures qui suivent l'absorption d'une cuillère à soupe d'un mélange de « pierre ¼ avec du miel, apparaissent des myalgies puis une altération de l'état général qui la conduit à consulter aux urgences après 5 jours. L'examen clinique est sans autre particularité alors que le bilan biologique rapporte une insuffisance rénale aiguë et une rhabdomyolyse. L'évolution est marquée par une aggravation de l'insuffisance rénale nécessitant plusieurs séances d'hémodialyse. Les circonstances d'apparition des symptômes associées à la consommation de la « pierre ¼ font suspecter une origine toxique. Un tube de sang et la « pierre ¼ sont adressés au Laboratoire de toxicologie biologique pour analyses. La « pierre ¼ friable, noire en surface, blanche en interne, est soluble dans les alcools et peu soluble dans l'eau. L'analyse par plasma à couplage inductif - spectrométrie de masse - ne retrouve ni éléments métalliques, ni métalloïdes. L'analyse par chromatographie gazeuse couplée à la spectrométrie de masse met en évidence un pic identifié comme de la paraphénylènediamine (PPD). Une analyse par spectroscopie UV permet d'estimer la pureté de la « pierre ¼ à plus de 99 %. La PPD utilisée comme teinture capillaire noire ou adjuvant du henné est responsable d'intoxications graves, majoritairement volontaires, caractérisées par une détresse respiratoire, une rhabdomyolyse associée à des douleurs musculaires et à une insuffisance rénale. À l'exception de la détresse respiratoire, notre patiente a présenté tous les signes cliniques de l'intoxication. L'absence de détection de la PPD dans le plasma s'explique tant par la mise en œuvre de méthodes non adaptées à la détection de ce type de composés chimiques, que par le délai écoulé depuis la consommation de la « pierre ¼.