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1.
Arch Med Sadowej Kryminol ; 73(3): 272-277, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38662468

RESUMO

Toilet cleaner containing hydrochloric acid is a common item found in households all over the world. Due to the availability of the substance, it becomes one of the main contributors to corrosive damage to the gastrointestinal system. This study reports a case of a female in her 50s with an alleged history of ingestion of toilet cleaner an empty bottle of which was found together with a suicide note at the incident site. During the autopsy, the forensic expert made an intriguing observation regarding the dispersion of ingested acid to other organs without gastric perforation. Despite the absence of gastric perforation, the corrosive effects of the ingested acid were evident in various organs, including the liver and spleen. This phenomenon suggests a unique mechanism by which the acid is able to disperse and cause damage beyond the stomach, leading to widespread organ involvement. However, through a comprehensive analysis of the detailed history, typical macroscopic autopsy findings, and chemical analysis reports, it is possible to establish that the cause of death is corrosive acid poisoning. In such cases, further investigation is warranted to gain a better understanding of the underlying mechanisms responsible for the dispersion of the acid and its clinical implications. By delving deeper into these aspects, we can enhance our knowledge and contribute to the field of forensic medicine.


Assuntos
Autopsia , Humanos , Feminino , Pessoa de Meia-Idade , Ácido Clorídrico/efeitos adversos , Ácido Clorídrico/envenenamento , Cáusticos/envenenamento , Cáusticos/toxicidade , Queimaduras Químicas/patologia , Queimaduras Químicas/etiologia , Detergentes/envenenamento , Detergentes/efeitos adversos , Suicídio Consumado , Patologia Legal
2.
bioRxiv ; 2024 Mar 17.
Artigo em Inglês | MEDLINE | ID: mdl-38559226

RESUMO

Long-read RNA sequencing has shed light on transcriptomic complexity, but questions remain about the functionality of downstream protein products. We introduce Biosurfer, a computational approach for comparing protein isoforms, while systematically tracking the transcriptional, splicing, and translational variations that underlie differences in the sequences of the protein products. Using Biosurfer, we analyzed the differences in 32,799 pairs of GENCODE annotated protein isoforms, finding a majority (70%) of variable N-termini are due to the alternative transcription start sites, while only 9% arise from 5' UTR alternative splicing. Biosurfer's detailed tracking of nucleotide-to-residue relationships helped reveal an uncommonly tracked source of single amino acid residue changes arising from the codon splits at junctions. For 17% of internal sequence changes, such split codon patterns lead to single residue differences, termed "ragged codons". Of variable C-termini, 72% involve splice- or intron retention-induced reading frameshifts. We found an unusual pattern of reading frame changes, in which the first frameshift is closely followed by a distinct second frameshift that restores the original frame, which we term a "snapback" frameshift. We analyzed long read RNA-seq-predicted proteome of a human cell line and found similar trends as compared to our GENCODE analysis, with the exception of a higher proportion of isoforms predicted to undergo nonsense-mediated decay. Biosurfer's comprehensive characterization of long-read RNA-seq datasets should accelerate insights of the functional role of protein isoforms, providing mechanistic explanation of the origins of the proteomic diversity driven by the alternative splicing. Biosurfer is available as a Python package at https://github.com/sheynkman-lab/biosurfer.

3.
Toxicol Rep ; 12: 369-374, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38572466

RESUMO

Introduction: Acute accidental poisoning in children remains a significant public health issue and a predictable cause of morbidity around the world. To take preventive measures, it is necessary to identify the pattern of this problem. Objective: To determine the extent and characteristics of paediatric poisoning, an epidemiological investigation specific to each country is required. The goal of our research was to determine the current pattern of acute poisoning in children between (0-5) years old in Jordan. Methods: This retrospective study performs a descriptive analysis of the Jordan University Hospital's National Poison Information Center (NPIC) database and describes the epidemiology of acute poisoning in children between (0-5) years old during a period of two years (2018-2019). Results: Paediatric poisoning (0-5) years old accounts for approximately 88% of poisoning cases in Jordan between 2018 and 2019.Out of 3531 paediatric poisoning cases, 44.9% of cases were in children between (2-3) years old, 63.4% of subjects were male. 40.9% of calls were from governmental hospitals. Most cases occurred at home (98.7%) and were unintentional (98.6%). Medication poisoning was the commonest among cases (71.0%). Besides, 89.4% were asymptomatic at the time of call, and Central Nervous System (CNS) symptoms being the most common (3.6%) among the symptomatic cases. Conclusions: Most cases of paediatric poisoning handled by the NPIC was due to medications. To prevent or minimize these cases, it is necessary to educate parents and other caregivers about proper medication storage and use, and in case of poisoning, urgent referral to health facilities is required.

4.
S Afr Fam Pract (2004) ; 66(1): e1-e5, 2024 Feb 27.
Artigo em Inglês | MEDLINE | ID: mdl-38572878

RESUMO

The impact of poisoning can differ significantly depending on the specific substance consumed. Identifying toxic substances in a patient is crucial to obtaining a thorough medical history. Frontline healthcare providers in the emergency department often handle patients presenting with poisoning. Their clinical presentation can vary depending on their dose, duration of exposure, and pre-existing medical conditions. Initially, poisoning management entails administering supportive care such as absorption and enhancing the elimination of poison with charcoal and antidote administration after identifying the poisoning substances. This article aims to provide a basic overview of the concepts involved in evaluating and managing these individuals.


Assuntos
Assistência Ambulatorial , Centros de Controle de Intoxicações , Humanos , Medicina Baseada em Evidências , Antídotos/uso terapêutico , Carvão Vegetal/uso terapêutico
5.
Clin Toxicol (Phila) ; : 1-8, 2024 Apr 18.
Artigo em Inglês | MEDLINE | ID: mdl-38634480

RESUMO

INTRODUCTION: Poison centers provide free expert recommendations on the treatment of a wide variety of toxicological emergencies. Prior studies have called attention to the increasing complexity of cases reported to poison centers. We aimed first, to evaluate the trends in medical outcome severity, over a 15-year period in both the adult and pediatric populations. Second, we described the most frequently reported substances associated with major effect or death. METHODS: This is a retrospective review of exposures reported to the National Poison Data System from 1 January 2007 through 31 December 2021. All closed cases, for human exposures, reported during the study period were included. We assessed trends in frequencies and rates of medical outcomes and level of care received, among the adult (age greater than 19 years) and pediatric (age 19 years and younger) populations by reason for exposure. RESULTS: During the study period, the number of adult unintentional exposures resulting in major effect (37.4 percent) and death (65.3 percent) increased. The number of adult intentional exposures resulting in death increased by 233.9 percent and those resulting in a major effect increased by 133.1 percent. The rates of exposures resulting in major effect and death increased among both intentional and unintentional adult exposures. The number of pediatric unintentional exposures resulting in a major effect increased by 76.6 percent and the number of pediatric intentional exposures resulting in death and major effect increased by 122.7 and 190.1 percent, respectively. Moderate, major effect, and death rates increased in pediatric unintentional exposures and moderate and major effect rates increased in pediatric intentional exposures. CONCLUSIONS: We found a worsening severity of medical outcomes in adult and pediatric cases reported to poison centers. Poison centers are increasingly managing complex cases. Monitoring trends in which substances are associated with severe outcomes is imperative for future strategic prevention efforts.

6.
Toxicol Res (Camb) ; 13(2): tfae053, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38585338

RESUMO

BACKGROUND: Poisoning-induced shock is a serious medical emergency with a high mortality rate. Hospitalized poisoned individuals experience multiple adverse cardiovascular events that could progress to cardiac arrest. This study was designed to compare the prognostic role of the admission shock index and plasma copeptin level in shocked poisoned patients and to evaluate their associations with initial patients' characteristics and outcomes. METHODS: We conducted a prospective study on acutely poisoned adult patients. RESULTS: A total of 41 patients were enrolled in the study. The mean age of all patients was 27.05 ± 10.99 years and most of the patients were females (n = 27, 66%). Pesticides were the most common type of poisoning (n = 18, 44%), followed by cardiovascular drugs (n = 12, 29.3%). Eleven (26.8%) patients died during the hospital stay length. The initial serum copeptin level and shock index could predict organ dysfunction indexed by sequential organ assessment score (SOFA) with area under the curve (AUCs) of 0.862 and 0.755, respectively. Initial serum copeptin and lactate levels, SOFA score, and their combination can strongly differentiate between survivors and non-survivors with an AUC of 0.944, 0.885, and 0.959, and 0.994, respectively. CONCLUSION: We concluded that the shock index, serum lactate level, and SOFA score may help in risk stratifying patients and predicting outcomes in critically ill patients with poisoning-induced shock. Copeptin is superior to the shock index in predicting mortality among the studied patients. However, a combination of SOFA score, serum copeptin level, and serum lactate level can develop a more predominant prediction for overall clinical outcomes in these patients.

7.
Trends Cancer ; 2024 Mar 22.
Artigo em Inglês | MEDLINE | ID: mdl-38521655

RESUMO

ß-Catenin is a well-established driver of many cancers; however, there are challenges in developing agents targeting ß-catenin for clinical use. Recent progress has indicated that most of the pathological changes in ß-catenin may be commonly caused by loss of protein homeostasis. Modulation of ß-catenin homeostasis, especially by hyperactivation of ß-catenin, potentially leads to robust antitumor outcomes. Here, we comprehensively dissect the protein homeostasis of ß-catenin in terms of time, compartmentalization, supramolecular assemblies, and dynamics, with emphasis on changes in ß-catenin homeostasis upon oncogenic mutations. We propose that altered ß-catenin homeostasis could be deleterious for ß-catenin-dependent cancers and that modulation of ß-catenin homeostasis offers a novel avenue for targeting ß-catenin for cancer therapy.

8.
J Med Biochem ; 43(1): 63-71, 2024 Jan 25.
Artigo em Inglês | MEDLINE | ID: mdl-38496014

RESUMO

Background: Viral encephalitis (VE) is one of the common diseases of children with intracranial infection, it has come on urgent, progress is fast, and the clinical features of severe cases may even lead to disability, death, and other serious adverse prognostic outcomes, so seek in early diagnosis and prognosis of efficiency of the relevant indicators to stop in time and take effective means to prevent the further development is of great significance. Neopterin (NPT), as a factor that plays an important role in the process of validation development, has been relatively rarely studied in children with VE. Methods: In this study, 127 cases of children with VE were retrieved from the TCGA database by bioinformatics, and their amplitude integrated electroencephalogram (AEEG) related information was collected at the same time. The neurodevelopmental status of VE children was evaluated according to the Gesell scale and divided into the good group (n=88) and the poor group (n=39). The differences in NPT expression and AEEG score between them were observed. In addition, the clinical data of 100 children without VE were screened from the database, and the differences in NPT expression and AEEG score between VE children and non-VE children were compared. The ROC curve was used to evaluate the clinical efficacy of NPT combined with AEEG in diagnosis and prognosis prediction. Kaplan-Meier was used to observe the effect of NPT high expression and low expression on poor prognosis of VE children.

9.
Clin Toxicol (Phila) ; : 1-7, 2024 Mar 19.
Artigo em Inglês | MEDLINE | ID: mdl-38501499

RESUMO

INTRODUCTION: Self-medication is the use of drugs to treat self-diagnosed illnesses or symptoms, on one's own initiative, without the guidance of a healthcare professional. Poison centers play an important role in understanding the relationship between self-medication and poisoning. The objective of this study is to evaluate the clinical and epidemiological profile of patients exposed to and/or poisoned by different drugs through self-medication. METHODS: This retrospective, cross-sectional, and descriptive study analyzed data from 2014 to 2020, provided by the Toxicological Information and Assistance Center of Santa Catarina, Brazil. Data were selected, tabulated, and analyzed by using descriptive statistics and group comparison with the chi-square test or Fisher's exact test. A P value <0.05 was considered statistically significant. RESULTS: There were 683 cases of self-medication identified. Most patients were female (62.8 percent) and between 20 and 29 years old (26.1 percent). A toxic dose of a substance was administered in only 22.8 percent of the cases, and five deaths were recorded. The most commonly used medications were anxiolytics (18 percent), followed by analgesics and antipyretics (15.4 percent). Paracetamol was the drug used in three of the five cases that resulted in deaths. DISCUSSION: This study demonstrates the prevalence of self-medication among women aged between 20 and 29 years old. Statistical analysis failed to show a relationship between a toxic dose and clinical manifestations. Anxiolytics, analgesics, and antipyretics are the most reported medications probably because healthcare professionals are mostly the ones who contact the center. Analgesics and antipyretics account for more than fifty percent of the deaths caused by self-medication in the present report. Some limitations such as secondary sources are related. CONCLUSION: We highlight the importance of health professionals in promoting the rational use of medicines, as well as poison centers in assisting the population and raising their awareness regarding the issue.

10.
Clin Toxicol (Phila) ; 62(2): 112-119, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38426845

RESUMO

INTRODUCTION: Hexahydrocannabinol is a hexahydro derivative of cannabinol. Poisoning with hexahydrocannabinol was first observed in Europe in May 2022. METHOD: This is a retrospective observational study of cases of self-reported hexahydrocannabinol exposure reported to French poison centres between 1 January 2022 and 31 May 2023. RESULTS: There were 37 cases, including 19 in May 2023. The median age of the patients was 36 (interquartile range 28-43) years, and most were men. Eight patients had a history of substance use disorder. The route of exposure was ingestion in 24, inhalation (smoking or vaping) in 10, inhalation and ingestion in two and sublingual in one. Clinical features were neurological (85 per cent), cardiovascular (61 per cent), gastrointestinal (33 per cent), psychiatric (27 per cent) and ocular (21 per cent). Fifty-nine per cent of the patients were hospitalized. In four patients, the Poisoning Severity Score was 0 (asymptomatic); in 15 patients, the Score was 1 (minor); in 16, the Score was 2 (moderate); and in two cases, the Score was 3 (severe). In 70 per cent of patients, the outcome was known, and all recovered. Testing of biological samples was only undertaken in six cases. Five patients had positive blood or urine tests for hexahydrocannabinol; in two patients, tetrahydrocannabinol and metabolites were also detected. In addition, there was an additional patient in whom Δ8- and Δ9-tetrahydrocannabinol was detected in the substances used. DISCUSSION: Clinical effects reported in this series included neuropsychiatric and somatic effects. Whilst these cases related to self-reported hexahydrocannabinol use, it is likely that tetrahydrocannabinol use also contributed to the effects in a substantial proportion of cases. This study has some limitations, such as the lack of available information due to the retrospective nature of the study. As a result, it probably overestimates the number of moderate and severe cases due to under-reporting of cases of little or no severity. Analysis of the patient's blood and urine was performed only in six patients, so we cannot be certain that the products consumed by the other patients were hexahydrocannabinol. CONCLUSION: The clinical effects attributed to hexahydrocannabinol were neurological, cardiovascular, gastrointestinal, psychiatric and ocular predominantly and were sometimes serious.


Assuntos
Intoxicação , Venenos , Masculino , Humanos , Adulto , Feminino , Dronabinol , Estudos Retrospectivos , Centros de Controle de Intoxicações , Europa (Continente)
11.
Clin Toxicol (Phila) ; 62(2): 126-128, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38451472

RESUMO

INTRODUCTION: We describe a rare food contamination of organically grown frozen green beans with Solanum nigrum, also called black night shade, which were widely available in supermarkets in the Netherlands. CASE SERIES: To our knowledge, only three adults and one child were referred to the emergency department for observation after eating the contaminated green beans. Only minor symptoms were seen during observation. The remainder of the frozen green beans were obtained from the patients and sent for analysis within one day. Within two and a half days after the first case, a public safety warning and recall were launched. DISCUSSION: Due to an increase in popularity of organic food, more incidents involving toxic weed contaminants like the one we describe in this report could happen when quality control in organic agriculture is insufficient. In this event, the critical control point obtained from the hazard analysis was insufficiently managed by the producer. CONCLUSION: This report demonstrates the efficient collaboration between the Dutch Poisons Information Centre, treating physicians at the hospital and the Netherlands Food and Consumer Product Safety Authority in case of a possible public safety issue. Because of quick acting and collaboration between the involved parties, the product was quickly withdrawn from the market.


Assuntos
Venenos , Solanum nigrum , Adulto , Criança , Humanos , Saúde Pública , Contaminação de Medicamentos , Hospitais
13.
Pharmacoepidemiol Drug Saf ; 33(2): e5767, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38357800

RESUMO

PURPOSE: Medication poisoning is the most common method of self-harm. Longitudinal studies incorporating pre- and post-COVID-19 pandemic data are required to describe the phenomenon and to evaluate the long-term impact on mental health. METHODS: Calls to the Poison Control Center of Policlinico Umberto I Hospital - Sapienza University of Rome, Italy, were analyzed retrospectively for characteristics and clinical presentation of cases of interest from January 2018 to December 2022. RESULTS: A total of 756 cases of self-harm by medication poisonings were recorded in the study period. A reduction in rate of cases in 2020 was followed by a return to pre-pandemic levels by 2021. When separately analyzing single- and multi-agent cases, occurrence of cases involving just one medication increased since early 2021, with a peak in 2022 (7.8% of total calls, 95% CI 6.2-9.5, from 4.9%, 95% CI 4.1-5.8 in 2018). This increase in the rate of cases, mostly of none or mild severity, was driven by youth aged 12-21, in which the relative proportion of single- versus multi-agent cases showed an increasing trend since 2020 (from 42.6% in 2018 to 78.6% in 2022). Acetaminophen was the medication most frequently involved and benzodiazepines the largest class. A psychiatric background was increasingly seen in 2022, especially in age group 12-21. CONCLUSION: Single-agent medication self-harm may be an increasingly prevailing phenomenon. Young adolescents with a psychiatric background might be most vulnerable to this behavior in the COVID-19 pandemic aftermath. Healthcare professionals should expect favorable clinical outcome and improve both counseling and psychotherapy supervision in individuals at risk.


Assuntos
COVID-19 , Intoxicação , Comportamento Autodestrutivo , Adolescente , Humanos , Estudos Retrospectivos , Centros de Controle de Intoxicações , Pandemias , Comportamento Autodestrutivo/epidemiologia , COVID-19/epidemiologia , Intoxicação/epidemiologia , Intoxicação/terapia
14.
Toxicology ; 503: 153755, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38367941

RESUMO

The attempt to define toxicovigilance can be based on defining its fundamental principles: prevention of infections with toxic substances, collecting information on poisonings, both in terms of their sources and side effects, and confirming poisonings, with the aim of improving treatment. Substances referred to include both those originating from animal bites, ingested inadvertently, and those resulting from environmental poisoning in industrial regions of countries, etc. In this review, we provide information about the crucial function of poison control centres in toxicovigilance, the importance of incorporating big data analytics and artificial intelligence to streamline toxicovigilance processes, and examples of toxicovigilance in different countries. In conclusion, we will present the direction that modern toxicovigilance should take, incorporating available artificial intelligence methods to maximise efficiency.


Assuntos
Inteligência Artificial , Centros de Controle de Intoxicações , Animais , Humanos , Medição de Risco
15.
Clin Toxicol (Phila) ; 62(1): 56-60, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38348840

RESUMO

INTRODUCTION: The death of Socrates in 399 BCE is described in Plato's dialogue, the Phaedo, written an unknown time afterwards from accounts by others. THE EVIDENCE: Socrates' death has almost always been attributed to his drinking an extract of poison hemlock, Conium maculatum, despite apparent discrepancies between the clinical features described in classical translations of the Phaedo and general clinical experience of poisoning with the toxic alkaloids it contains. EVALUATION: Recent acute philological analysis of the original Greek text has resolved many of the discrepancies by showing that the terms used in the classical translations were misinterpretations of the clinical signs described. It is also likely that the unpleasant clinical effects, such as vomiting, abdominal pain, diarrhoea and muscle fasciculation commonly described in modern reports of poison hemlock poisoning, were not mentioned to present the death of Socrates in a way consistent with his philosophical ideals and those of his pupil Plato. CONCLUSIONS: Seen in this way, the death of Socrates can be accepted as a limited case report of Conium maculatum poisoning. Even after reaching that conclusion, intriguing scientific questions remain about the toxicity of the coniine alkaloids and the mechanisms of their effects.


Assuntos
Alcaloides , Intoxicação por Plantas , Humanos , Alcaloides/análise , Conium , História Antiga , Intoxicação por Plantas/etiologia , Intoxicação por Plantas/diagnóstico
16.
Clin Toxicol (Phila) ; 62(1): 46-52, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38421360

RESUMO

INTRODUCTION: Oral potassium poisoning can be life-threatening. The study aimed to describe patterns of oral potassium poisoning in adult and pediatric populations and characterize its clinical presentation and management as reported by United States poison centers. METHODS: This is a retrospective review of the National Poison Data System from 1 January 2010 through 30 June 2021. We descriptively analyzed cases involving single substance, oral potassium salts. In a second step, we requested a subset of case-specific narratives for cases that resulted in major outcome or death, as well as cases where patients received any of the following therapies: whole bowel irrigation, sodium bicarbonate, calcium, insulin or hemodialysis. We classified hyperkalemia by expected toxicity: mild (peak potassium concentration <6.5 mEq/L), moderate (peak potassium concentration 6.5 to <8 mEq/L) or severe (peak potassium concentration ≥ 8mEq/L). RESULTS: The National Poison Data System included 1,820 cases, 52.3 percent being adults. Among adult cases, 20% (n = 189) resulted in a moderate effect, major effect or death. Among pediatric cases aged <10 years, all exposures were unintentional. Analysis of 49 case narratives showed a median peak potassium concentration of 7.1 mEq/L (interquartile range 5.4-8.6) and a moderate correlation with the dose ingested (r = 0.66). Severe hyperkalemia was associated with QRS complex widening (P < 0.001), peaked T-waves (P = 0.001), and neurological symptoms (P = 0.04). Whole bowel irrigation was associated with mild hyperkalemia (P = 0.011), and hemodialysis was associated with severe hyperkalemia (P < 0.001). DISCUSSION: Analysis of data showed that therapy to promote intracellular shift of potassium is the mainstay of management of oral potassium poisoning, followed by hemodialysis. LIMITATIONS: Poison center data are susceptible to reporting bias. National Poison Data System data are affected by completeness and accuracy of reporting from health care providers and the lay public. CONCLUSIONS: Single substance, oral potassium poisoning, reported to United States poison centers, is mostly unintentional and rarely results in hyperkalemia.


Assuntos
Hiperpotassemia , Venenos , Adulto , Humanos , Criança , Hiperpotassemia/induzido quimicamente , Hiperpotassemia/epidemiologia , Hiperpotassemia/terapia , Estudos Retrospectivos , Potássio , Pessoal de Saúde
17.
Toxicol Res (Camb) ; 13(1): tfad113, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38179000

RESUMO

Objective: Mortality prediction in acute poisoning patients aids in prompt and effective treatment. This study aimed to evaluate the effectiveness of the new Poisoning Mortality Score (PMS) in comparison with the Poison Severity Score (PSS) and Sequential Organ Failure Assessment (SOFA) scoring systems in poisoned patients admitted to the intensive care unit (ICU). Material and Methods: The medical records of 523 poisoned patients admitted to the ICU of the Poison Control Centre from September 2021 to June 2022 were examined retrospectively. The PMS, PSS, and SOFA scores were calculated based on the worst values of the first 24 h of admission. Results: A total of 100 patients were enrolled in the study, and the in-hospital mortality rate was 28%. The best cut-off points for predicting mortality for PMS, PSS, and SOFA scores were > 53, > 2, and > 6, with sensitivities of 67.9%, 85.7%, and 82.4% and specificities of 73.6%, 84.7%, and 83.3% respectively. In a pairwise comparison of the AUCs for PMS, PSS, and SOFA scores, SOFA displayed significantly greater accuracy than PSS and PMS. Conclusion: The PMS, PSS, and SOFA scoring systems were significant predictors of mortality in ICU-admitted poisoned patients, however, the SOFA score showed the best performance (OR = 1.77, and 95% CI = 1.42-2.54) with significant P-value (0.002) as a predictor of mortality and highest AUC(0.904).

18.
bioRxiv ; 2024 Jan 10.
Artigo em Inglês | MEDLINE | ID: mdl-38260330

RESUMO

Shifts in microbiome community composition can have large effects on host health. It is therefore important to understand how perturbations, like those caused by the introduction of exogenous chemicals, modulate microbiome community composition. In poison frogs within the family Dendrobatidae, the skin microbiome is exposed to the alkaloids that the frogs sequester from their diet and use for defense. Given the demonstrated antimicrobial effects of these poison frog alkaloids, these compounds may be structuring the skin microbial community. To test this, we first characterized microbial communities from chemically defended and closely related non-defended frogs from Ecuador. Then we conducted a laboratory experiment to monitor the effect of the alkaloid decahydroquinoline (DHQ) on the microbiome of a single frog species. In both the field and lab experiments, we found that alkaloid-exposed microbiomes are more species rich and phylogenetically diverse, with an increase in rare taxa. To better understand the strain-specific behavior in response to alkaloids, we cultured microbial strains from poison frog skin and found the majority of strains exhibited either enhanced growth or were not impacted by the addition of DHQ. Additionally, stable isotope tracing coupled to nanoSIMS suggests that some of these strains are able to metabolize DHQ. Taken together, these data suggest that poison frog chemical defenses open new niches for skin-associated microbes with specific adaptations, including the likely metabolism of alkaloids, that enable their survival in this toxic environment. This work helps expand our understanding of how exposure to exogenous compounds like alkaloids can impact host microbiomes.

19.
Nervenarzt ; 95(1): 28-34, 2024 Jan.
Artigo em Alemão | MEDLINE | ID: mdl-38189941

RESUMO

New psychoactive substances (NPS) are a heterogeneous group of synthetic intoxicating substances. What they have in common is their "new" appearance as a narcotic drug. Many of them imitate known drugs; some of them are derivatives of substances developed as drugs many years ago. Changed or completely newly developed chemical structures often give the NPS a massively increased effect. This includes not only the effects desired by the consumer, but also the undesirable effects with sometimes fatal consequences. The use of NPS has been an increasing phenomenon for years. In 2018, 2.6% of German adults had already had experience with NPS. NPS-intoxicated persons represent a challenge for the treating physicians not only because of the heterogeneity of the substances, but also because of the unpredictable effects for the users. The clinical assessment is often made more difficult due to the presence of a mixed intoxication. Only systemic toxicological analysis-generally not readily available-provides safety, as conventional rapid or bedside tests do not record many substances. There is no global definition of NPS. A practical, clinical classification differentiates into four groups: synthetic stimulants, synthetic cannabinoids, synthetic hallucinogens, and synthetic sedatives.


Assuntos
Canabinoides , Estimulantes do Sistema Nervoso Central , Medicina de Emergência , Transtornos Relacionados ao Uso de Substâncias , Adulto , Humanos , Psicotrópicos/efeitos adversos , Canabinoides/efeitos adversos
20.
Br J Clin Pharmacol ; 90(3): 812-818, 2024 03.
Artigo em Inglês | MEDLINE | ID: mdl-37953463

RESUMO

AIMS: Lacosamide is a third-generation antiepileptic drug used as adjunctive therapy for partial seizures. Since its approval in 2008 very few cases of lacosamide overdose have been described in literature. The aim of our study was to evaluate clinical characteristics of acute lacosamide poisoning. METHODS: A retrospective observational study was performed including all cases of acute lacosamide poisoning referred to Pavia Poison Control Centre from January 2012 to December 2021. For each patient age, sex, ingested dose, coingestants, clinical manifestations, treatment and outcome were collected. RESULTS: A total of 31 subjects (median age 39 years, [interquartile range: 26.5-46.5]; females 22/31) were included. The median lacosamide ingested dose was 1500 mg [650-2800]. In 35.5% of cases lacosamide was the single ingested substance, while in 64.5% coingestants were also present. Coingestants varied from a minimum of 1 to a maximum of 3, with the more common being benzodiazepines and valproic acid. Clinical manifestations were present in 87% patients the most common were: vomiting (29%); seizures (29%), coma (25.8%), drowsiness (25.8%), confusion (12.9%), agitation (12.9%), tachycardia (12.9%), tremors (9.7%), bradycardia (9.7%), headache (6.5%) and hypertension (3.2%). The median lacosamide ingested dose was significantly higher in patients that experienced coma compared to patient who did not (2800 vs. 800 mg; P = .0082). Orotracheal intubation was necessary in 32.3% of patients. All patients fully recovered. CONCLUSION: Lacosamide acute overdose may lead to a severe clinical picture. Dentral nervous system symptoms predominated, particularly seizures and coma occurred in a high percentage of cases.


Assuntos
Overdose de Drogas , Centros de Controle de Intoxicações , Feminino , Humanos , Adulto , Lacosamida/uso terapêutico , Coma/induzido quimicamente , Coma/tratamento farmacológico , Anticonvulsivantes/uso terapêutico , Convulsões/induzido quimicamente , Convulsões/tratamento farmacológico , Overdose de Drogas/terapia , Overdose de Drogas/tratamento farmacológico
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