Comparative genomics of plant growth promoting phosphobacteria isolated from acidic soils.

Despite being one of the most abundant elements in soil, phosphorus (P) often becomes a limiting macronutrient for plants due to its low bioavailability, primarily locked away in insoluble organic and inorganic forms. Phosphate solubilizing and mineralizing bacteria, also called phosphobacteria, isolated from P-deficient soils have emerged as a promising biofertilizer alternative, capable of converting these recalcitrant P forms into plant-available phosphates. Three such phosphobacteria strains-Serratia sp. RJAL6, Klebsiella sp. RCJ4, and Enterobacter sp. 198-previously demonstrated their particular strength as plant growth promoters for wheat, ryegrass, or avocado under abiotic stresses and P deficiency. Comparative genomic analysis of their draft genomes revealed several genes encoding key functionalities, including alkaline phosphatases, isonitrile secondary metabolites, enterobactin biosynthesis and genes associated to the production of indole-3-acetic acid (IAA) and gluconic acid. Moreover, overall genome relatedness indexes (OGRIs) revealed substantial divergence between Serratia sp. RJAL6 and its closest phylogenetic neighbours, Serratia nematodiphila and Serratia bockelmanii. This compelling evidence suggests that RJAL6 merits classification as a novel species. This in silico genomic analysis provides vital insights into the plant growth-promoting capabilities and provenance of these promising PSRB strains. Notably, it paves the way for further characterization and potential application of the newly identified Serratia species as a powerful bioinoculant in future agricultural settings.

Exploring the relationship between admixture and genetic susceptibility to attention deficit hyperactivity disorder in two Latin American cohorts.

Contemporary research on the genomics of Attention Deficit Hyperactivity Disorder (ADHD) often underrepresents admixed populations of diverse genomic ancestries, such as Latin Americans. This study explores the relationship between admixture and genetic associations for ADHD in Colombian and Mexican cohorts. Some 546 participants in two groups, ADHD and Control, were genotyped with Infinium PsychArray®. Global ancestry levels were estimated using overall admixture proportions and principal component analysis, while local ancestry was determined using a method to estimate ancestral components along the genome. Genome-wide association analysis (GWAS) was conducted to identify significant associations. Differences between Colombia and Mexico were evaluated using appropriate statistical tests. 354 Single-nucleotide polymorphisms (SNPs) and Single-nucleotide variants (SNVs) related to some genes and intergenic regions exhibited suggestive significance (p-value < 5*10e-5) in the GWAS. None of the variants revealed genome-wide significance (p-value < 5*10e-8). The study identified a significant relationship between risk SNPs and the European component of admixture, notably observed in the LOC105379109 gene. Despite differences in risk association loci, such as FOXP2, our findings suggest a possible homogeneity in genetic variation's impact on ADHD between Colombian and Mexican populations. Current reference datasets for ADHD predominantly consist of samples with high European ancestry, underscoring the need for further research to enhance the representation of reference populations and improve the identification of ADHD risk traits in Latin Americans.

Surgical anatomical landmarks for arthroscopic repair of subscapularis tendon tears.

Background: Subscapularis repair has recently garnered significant interest. A thorough understanding of the tendon's anatomy is essential for precise and safe repair. Our objectives were to describe the anatomy of the subscapularis insertion, define its landmarks, and analyze nearby structures to guide arthroscopic repair. Methods: We conducted an anatomical study, dissecting 12 shoulders. We evaluated the distance from the footprint to the axillary nerve, the dimensions, and shape of the footprint, and its relationship with the humeral cartilage. Results: The distance to the axillary nerve was 32 mm (standard deviation [SD], 3.7 mm). The craniocaudal length of the footprint was 37.3 mm (SD, 4.6 mm). Its largest mediolateral thickness was 16 mm (SD, 2.2 mm), wider at the top and narrower distally. The distance between the footprint and the cartilage varied, being 3.2 mm (SD, 1.2 mm) in the upper part, 5.4 mm (SD, 1.8 mm) in the medium, and 15.9 mm (SD, 2.9 mm) in the lower part. Conclusions: When performing a repair of the subscapularis tendon, the distance to the cartilage should be carefully evaluated as it varies proximally to distally, and the shape of the footprint (wider proximally, tapered distally) should be considered for implant positioning. The distance to the axillary nerve is approximately 30 mm. Anterior visualization guarantees direct control of all landmarks and allows accurate implant positioning with safe tendon release.

Treatment with fostamatinib in patients with immune thrombocytopenia: Experience from the Andalusian region in Spain-The Fostasur Study.

Immune thrombocytopenia (ITP) is characterized by low platelet counts (PLTs) and an increased risk of bleeding. Fostamatinib, a spleen tyrosine kinase inhibitor, has been approved as a second-line treatment for ITP. Real-world data on fostamatinib are lacking. This observational, retrospective, multicentre study, conducted in the Andalusia region of Spain, evaluated 44 adult primary ITP patients (47.7% female; median age 58 years; newly diagnosed ITP 6.8%; persistent 13.6%; chronic 79.5%; median four prior treatments) after ≥ 4 weeks of fostamatinib therapy. The median PLT at the initiation of fostamatinib was 15 × 109/L. Common reasons for starting fostamatinib were refractoriness or intolerance to prior therapy, oral medication preference, history of thrombosis and cardiovascular risk. Dosing was individualized based on efficacy and tolerance. After 2 weeks, global response rate was 56.8% (response and complete response). Response rates were 70.5%, 62.5% and 64% at 4 weeks, 12 weeks and at the end of the study respectively. Adverse events were mild, and no patients discontinued as a result. This real-world study demonstrated a response rate similar to fostamatinib as seen in the pivotal clinical trials while including newly diagnosed patients and allowing for individualized dosing.

Dissecting the Roles of Phosphorus Use Efficiency, Organic Acid Anions, and Aluminum-Responsive Genes under Aluminum Toxicity and Phosphorus Deficiency in Ryegrass Plants.

Aluminum (Al) toxicity and phosphorus (P) deficiency are widely recognized as major constraints to agricultural productivity in acidic soils. Under this scenario, the development of ryegrass plants with enhanced P use efficiency and Al resistance is a promising approach by which to maintain pasture production. In this study, we assessed the contribution of growth traits, P efficiency, organic acid anion (OA) exudation, and the expression of Al-responsive genes in improving tolerance to concurrent low-P and Al stress in ryegrass (Lolium perenne L.). Ryegrass plants were hydroponically grown under optimal (0.1 mM) or low-P (0.01 mM) conditions for 21 days, and further supplied with Al (0 and 0.2 mM) for 3 h, 24 h and 7 days. Accordingly, higher Al accumulation in the roots and lower Al translocation to the shoots were found in ryegrass exposed to both stresses. Aluminum toxicity and P limitation did not change the OA exudation pattern exhibited by roots. However, an improvement in the root growth traits and P accumulation was found, suggesting an enhancement in Al tolerance and P efficiency under combined Al and low-P stress. Al-responsive genes were highly upregulated by Al stress and P limitation, and also closely related to P utilization efficiency. Overall, our results provide evidence of the specific strategies used by ryegrass to co-adapt to multiple stresses in acid soils.

Adding vortexing to the Maki technique provides no benefit for the diagnosis of catheter colonization or catheter-related bacteremia.

BACKGROUND: A previous study compared vortexing and Maki techniques for the diagnosis of catheter-related bloodstream infection (CRBSI), and concluded that vortexing was not superior to Maki method. AIM: To determine whether the combined use of vortexing and Maki techniques provides profitability versus the Maki technique for the diagnosis of catheter tip colonization (CTC) and CRBSI. METHODS: Observational and prospective study carried out in an Intensive Care Unit. Patients with suspected catheter-related infection (CRI) and with one central venous catheter for at least 7 days were included. The area under the curve (AUC) of the Maki technique, the vortexing technique and the combination of both techniques for the diagnosis of CTC and CRBSI were compared. RESULTS: We included 136 episodes of suspected CRI. We found 21 cases of CTC of which 10 were also CRBSI cases. Of the 21 CTC episodes, 18 (85.7%) were diagnosed by Maki technique and vortexing technique, 3 (14.3%) only by the technique of Maki, and none only by technique of vortexing. Of the 10 CRBSI episodes, 9 (90.0%) were diagnosed by the techniques of Maki and vortexing, 1 (10.0%) was diagnosed only by the technique of Maki, and none only by the technique of vortexing. We no found differences in the comparison of AUC between the technique of Maki and the combination of Maki and vortexing techniques for the diagnosis of CTC (P = 0.99) and CRBSI (P = 0.99). CONCLUSION: The novel finding of our study was that the combined use of vortexing and Maki techniques did not provide profitability to the technique of Maki alone to CRBSI diagnosis of.

Do Herbal Supplements and Probiotics Complement Antibiotics and Diet in the Management of SIBO? A Randomized Clinical Trial.

Small intestinal bacterial overgrowth (SIBO) arises from dysbiosis in the small intestine, manifesting with abdominal symptoms. This study aims to assess the efficacy of combined antibiotic therapy, herbal supplements, probiotics, and dietary modifications in SIBO management. A total of 179 SIBO-diagnosed patients underwent clinical evaluation and breath testing. Patients were categorized into hydrogen (H2-SIBO) and methane (CH4-SIBO) groups. The control group received standard antibiotic therapy and a low-FODMAP diet, while the intervention group received additional herbal antibiotics, probiotics, and prebiotics. After treatment, both groups exhibited reduced gas levels, particularly in CH4-SIBO. Clinical remission rates were higher in the intervention group, especially in CH4-SIBO cases. Logistic regression analysis showed gas concentrations at diagnosis as significant predictors of treatment success. In conclusion, adjunctive herbal supplements and probiotics did not significantly impact gas levels, but showed potential for clinical improvement, especially in CH4-SIBO.

Development of a capillary temperature control system for capillary electrophoresis instruments designed for spaceflight applications.

Capillary temperature control during capillary electrophoresis (CE) separations is key for achieving accurate and reproducible results with a broad array of potential methods. However, the difficulty of enabling typical fluid temperature control loops on portable instruments has meant that active capillary temperature control of in situ CE systems has frequently been overlooked. This work describes construction and test of a solid-state device for capillary temperature control that is suitable for inclusion with in situ instruments, including those designed for space missions. Two test articles were built, a thermal mass model (TMM) and a functional model (FM). The TMM demonstrated that temperature gradients could be limited using the proposed control scheme, and that our thermal modeling of the system can be relied on for future adaptations of physical geometries of the system. The FM demonstrated CE analytical performance while under active temperature control and that the device was compatible with the harsh thermal-vacuum environments that might be encountered during space flight.

Shorter versus longer duration of antimicrobial therapy for early Lyme disease: A systematic review and meta-analysis.

BACKGROUND: Antibiotic therapy for patients with early Lyme disease is necessary to prevent later-stage Lyme disease complications. This systematic review and meta-analysis compares shorter versus longer antibiotic regimens in treating early Lyme disease. METHODS: A systematic search of PubMed, Embase, and Cochrane Central Register of Controlled Trials was conducted up to November 2023. We examined treatment failure, complete response, and photosensitivity. Short vs. long therapy was defined as ≤10 days vs. >10 days. Subgroup analyses included antibiotic type and varying treatment durations. Analysis utilized RStudio 4.1.2. PROSPERO registration: CRD42023423876. RESULTS: Seven studies, encompassing 1,462 patients, were analyzed. No significant differences in treatment failure, 12-month complete response, final visit complete response were found between short and long durations of antibiotic therapy. Subgroup and sensitivity analyses corroborated these findings. CONCLUSION: Shorter and longer antibiotic regimens for early Lyme disease show similar efficacy, highlighting the potential of ≤10-day courses, as effective treatment options.

HIV-Related Stigma and Treatment Adherence Among Gay, Bisexual, and Other Men Who Have Sex with Men Who Use Crystal Meth in the Metropolitan Area of Mexico City.

Internationally, HIV-related stigma and crystal methamphetamine (meth) use have been described as barriers to treatment adherence among gay, bisexual, and other men who have sex with men (gbMSM). Crystal meth use has been increasing among gbMSM in the Metropolitan Area of Mexico City (MAMC). Therefore, this study aimed to determine the association between HIV-related stigma and HIV treatment adherence among gbMSM who use crystal meth in the MAMC. This study was undertaken as part of an exploratory study of crystal meth use in the MAMC. The data were collected from September to December 2021 through an encrypted online survey. Participants (n = 89) were gbMSM adults living with HIV who reported crystal meth use in the past month that were recruited through an online snowball sampling. The online survey included questions about HIV treatment adherence, sexual behaviors, the Alcohol, Smoking, and Substance Involved Screening Test, and the HIV-Related Stigma Mechanisms Scale. Logistic regression analyses assessed the association between HIV-related stigma and HIV treatment adherence. The multivariate logistic regression model showed that, controlling for health insurance [adjusted odds ratio (AOR) = 0.13; 95% confidence intervals (CI)  = 0.02-0.59] and educational level (AOR = 0.16; 95% CI = 0.02-0.88), non-adherence to HIV treatment was independently associated with higher HIV-related stigma (AOR = 1.06; 95% CI = 1.01-1.12). Public health policies must include HIV-related stigma and substance use in treating gbMSM with HIV.

Stevia rebaudiana Bertoni, an American plant used as sweetener: Study of its effects on body mass control and glycemia reduction in Wistar male and female rats.

Stevia rebaudiana Bertoni water extracts have been used as a natural sweetener and customary medicine by the indigenous inhabitants of South America for several hundred years. This plant was sent to Europe in the 16th century and was described by Peter Jacob Esteve in Spain. Recently the food industry has started to employ S. rebaudiana as sweetener using its glycosides after purification. Advertisement claims that Stevia glycosides is good for controling body mass and reducing glycemia. This study's objective was to evaluate the effect of S. rebaudiana leaf extract on Wistar rats as animal model to prove its effectiveness on body mass control, glycemia reduction, and other biochemical parameters. Three groups were randomly formed with 24 males and 24 females: A blank group without any sweetener, a control group drinking water with 10% glucose, and the test group ingesting a 0.94% water extract of S. rebaudiana. Body mass measurements as well as food and drink consumption were daily performed. The experiment lasted 120 days after the specimens were weaned and got used to eating solid food. Euthanasia was done and blood serum was collected to evaluate the following biochemical parameters: Glucose, triglycerides, cholesterol, insulin, glucagon, leptin, ghrelin, and glucose-dependent insulinotropic peptide, GIP. Results indicated that only female rats had statistical differences in body mass gain. No relevant effects either positive or negative were found in the biochemical parameters measured. The crude extracts of S. rebaudiana did not show any relevant changes in biochemical and hormonal profiles, changes nor body mass with respect to the blank and control groups of young and healthy rats in the age range of infancy to youth. According to the results obtained, the therapeutic properties that have been associated to S. rebaudiana consumption especially for body mass control and glycemia reduction, did not occur in young and healthy male and female rats in equivalent age to infants, young children, and youths.

Suicidal Ideation and Behavior Among Mexican University Students Before and During the COVID-19 Pandemic.

OBJECTIVE: The COVID-19 pandemic has affected the mental health of populations around the world, but few longitudinal studies of its impact on suicidal thoughts and behaviors have been published especially from low- and middle-income countries. METHODS: This is a prospective cohort study of 1,385 first-year students from 5 Universities in Mexico followed-up for 1 year. We report 1-year cumulative incidence of suicidal thoughts and behaviors before (September 19, 2019-March 29, 2020) and during the COVID-19 period (March 30, 2020-June 30, 2020), focusing on those in the COVID-19 period with risk conditions and positive coping strategies during the pandemic. RESULTS: There was an increase in the incidence of suicidal ideation during the COVID-19 period compared to the pre-COVID-19 period (RR 1.65, 95%CI 1.08-2.50). This increase was mostly found among students with heightened sense of vulnerability (RR 1.95), any poor coping behavior (RR 2.40) and a prior mental disorder (RR 2.41). While we found no evidence of an increased risk of suicidal planning or attempts, there was evidence that those without lifetime mental health disorders were at greater risk of suicidal plans than those with these disorders especially if they had poor coping strategies (RR 3.14). CONCLUSION: In the short term, how students deal with the pandemic, being at high risk and having poor coping behavior, increased the new occurrence of suicidal thoughts and behaviors. Studies with longer follow-up and interventions to reduce or enhance these behaviors are needed.HIGHLIGHTSSuicidal ideation increased during the COVID-19 periodThose with heightened sense of vulnerability and poor coping were more affectedStudies with longer follow-up are needed.

The Impact of Major Earthquakes on Students' Emotional Distress and Internalizing Symptoms, Externalizing Behaviors, and Coping During the Implementation of keepin' it REAL-Mexico.

This article reports on effects of two earthquakes in Mexico on adolescents attending middle school. The earthquakes struck in close succession during the implementation of a school-based prevention program, providing an opportunity to assess emotional distress due to the earthquakes and whether the life skills taught in the program affected how students coped with the natural disaster. The objectives were to (1) evaluate the earthquakes' impact on students' distress; (2) assess if distress is associated with internalizing symptomology and externalizing behaviors; and (3) investigate if students receiving the original and adapted versions of the intervention coped better with the events. A Mexico-US research team culturally adapted keepin' it REAL to address connections between substance use among early adolescents in Mexico and exposure to violence. A random sample of public middle schools from three cities (Mexico City, Guadalajara, and Monterrey), stratified by whether they held morning or afternoon sessions, was selected. A total of 5522 7th grade students from 36 schools participated in the study. Students answered pretest and posttest questionnaires; the latter assessed earthquake-related distress and coping strategies. Earthquake-related distress was associated with all measures of undesired internalizing symptomology and externalizing behaviors. Compared to controls, students in the adapted intervention reported less aggressive and rule-breaking externalizing behavior and less violence perpetration. However, these intervention effects were not moderated by the level of earthquake-related distress, and they were not mediated by positive or negative coping. The findings have implications for prevention intervention research and policy as natural and human-made disasters occur more often.

A novel NONO nonsense variant in a fetus with renal abnormalities.

At 16 + 6-weeks a fetal scan performed in the second pregnancy of a 42 y.o. woman identified a right multicystic dysplastic kidney, left renal agenesis, absent urinary bladder, myocardial hypertrophy, increased nuchal fold, a single umbilical artery, and oligohydramnios. Trio exome sequencing analysis detected a novel pathogenic NONO variant. Postmortem examination after the termination of pregnancy confirmed the ultrasound findings and also revealed pulmonary hypoplasia, retrognathia and low-set ears. The variant was a novel de novo hemizygous pathogenic loss-of-function variant in NONO [NM_007363.5], associated with a rare X-linked recessive neurodevelopmental disorder, named intellectual developmental disorder, X-linked syndromic 34 (OMIM#300967). The postnatal characteristic features of this disorder include intellectual disability, developmental delay, macrocephaly, structural abnormalities involving the corpus callosum and/or cerebellum, left ventricular noncompaction and other congenital heart defects. In the prenatal setting, the phenotype has been poorly described, with all described cases presenting with heart defects. This case highlights the need of further clinical delineation to include renal abnormalities in the prenatal phenotype spectrum.

Pruebas Térmicas de Sensibilidad Pulpar en Dientes Permanentes con Pulpitis: Valor Diagnóstico y Limitaciones / Teste de Sensibilidade da Polpa Térmica em Dentes Permanentes com Pulpite: Valor Diagnóstico e Limitações / Thermal Pulp Sensitivity Testing in Permanent Teeth with Pulpitis: Diagnostic Value and Limitations

Introducción: El proceso diagnóstico en endodoncia inicia con el reconocimiento de la sintomatología, la historia dental y la evaluación clínica objetiva, en donde las pruebas térmicas de sensibilidad pulpar son indispensables en la rutina clínica para tener una aproximación de la condición pulpar. Sin embargo, la comprensión de la naturaleza de las pruebas diagnósticas, y de la fisiopatología pulpar, son indispensables para interpretar acertadamente sus resultados. Objetivo: Reconocer el valor diagnóstico y las limitaciones de las pruebas térmicas de sensibilidad pulpar durante la evaluación endodóntica del diente permanente afectado con pulpitis. Materiales y Métodos: El desarrollo de la presente revisión narrativa se llevó a cabo mediante una estrategia de búsqueda en la base electrónica de datos, la consulta en portales web especializados, y, además, requirió una pesquisa en búsqueda de artículos primarios valiosos y libros. Resultados: Fueron seleccionadas 34 publicaciones por su aporte y relevancia. Conclusiones: La prueba de sensibilidad empleando el estímulo del frío de forma apropiada resulta en una alta correspondencia para descartar entre una pulpa vital o necrótica. Esta alta correspondencia también se mantiene para las pulpitis reversibles, con una leve disminución para los casos de pulpitis irreversible, aunque sigue teniendo un alto valor diagnóstico. Sin embargo, sus principales inconvenientes siguen siendo que se basan en una respuesta cualitativa del paciente, cargada de subjetividad, e imprescindiblemente, requieren de experiencia y destreza por parte del clínico para su ejecución e interpretación.

O processo diagnóstico em endodontia inicia-se com o reconhecimento dos sintomas, a história dentária e a avaliação clínica objetiva, onde os testes de sensibilidade pulpar térmica são essenciais na rotina clínica para se ter uma aproximação do estado pulpar. Contudo, a compreensão da natureza dos exames diagnósticos e da fisiopatologia pulpar é essencial para a correta interpretação dos seus resultados. Objetivo:Reconhecer o valor diagnóstico e as limitações dos testes de sensibilidade pulpar térmica durante a avaliação endodôntica do dente permanente acometido por pulpite. Materiais e Métodos: O desenvolvimento desta revisão narrativa foi realizado por meio de estratégia de busca na base de dados eletrônica, consulta em portais especializados e, além disso, exigiu busca por artigos primários e livros valiosos. Resultados: foram selecionadas 34 publicações pela sua contribuição e relevância. Conclusões: O teste de sensibilidade utilizando o estímulo frio resulta adequadamente em alta correspondência para descartar polpa vital ou necrótica. Esta elevada correspondência também se mantém para a pulpite reversível, com ligeira diminuição para os casos de pulpite irreversível, embora continue a ter um elevado valor diagnóstico. No entanto, as suas principais desvantagens continuam a ser o facto de se basearem numa resposta qualitativa do paciente, carregada de subjetividade, e exigirem necessariamente experiência e habilidade por parte do clínico para a sua execução e interpretação

Introduction: The diagnostic process in endodontics begins with the recognition of the symptoms, the dental history and the objective clinical evaluation, where thermal pulp sensitivity tests are essential in the clinical routine to have an approximation of the pulp condition. However, understanding the nature of the diagnostic tests, and the pulp pathophysiology, are essential to correctly interpret their results. Objective: To recognize the diagnostic value and limitations of thermal pulp sensitivity tests during the endodontic evaluation of the permanent tooth affected with pulpitis. Materials and Methods: The development of this narrative review was carried out through a search strategy in the electronic database, consultation in specialized web portals, and, in addition, required a search for valuable primary articles and books. Results: 34 publications were selected for their contribution and relevance. Conclusions: The sensitivity test using the cold stimulus appropriately results in a high correspondence to rule out a vital or necrotic pulp. This high correspondence is also maintained for reversible pulpitis, with a slight decrease for cases of irreversible pulpitis, although it continues to have a high diagnostic value. However, their main drawbacks continue to be that they are based on a qualitative response from the patient, loaded with subjectivity, and necessarily require experience and skill on the part of the clinician for their execution and interpretation.

Vitamin D deficiency and non-infectious uveitis: A systematic review and Meta-analysis.

BACKGROUND: Vitamin D plays a critical role in immunomodulation, and its deficiency is implicated in the pathogenesis of several autoimmune diseases. Nevertheless, its relationship with non-infectious uveitis (NIU), an inflammatory ocular disorder, remains inconclusive. METHODS: A systematic search was conducted in three databases from database inception until May 8, 2023, to investigate the potential relationship between vitamin D deficiency and NIU. We included observational studies reporting the measurement of vitamin D levels in patients with NIU and healthy controls without restriction of language or date of publication. Three pairs of authors independently screened the title and abstracts for potential eligibility and then in full text. A third author resolved disagreements. Three pairs of independent reviewers abstracted the data from the fully reviewed records and evaluated the risk of bias. We followed The MOOSE and PRISMA guidelines. Random effects meta-analyses were used for primary analysis. Studies not included in the meta-analysis were summarized descriptively. This review was registered in PROSPERO: CRD42022308105. FINDINGS: Of 933 records screened, 11 studies were included, and five were meta-analyzed, encompassing 354 cases and 5728 controls (mean participant age ranging from 7.1 to 58.9 years). Patients with vitamin D deficiency exhibited an Odds Ratio of 2.04 (95% CI = 1.55-2.68, P < 0.00001) for developing NIU compared to controls. Overall, potential sources of bias were low across most studies. INTERPRETATION: Our findings suggest that vitamin D may play an essential role in the pathophysiology of NIU. While the included studies demonstrated generally low potential bias, additional rigorous prospective studies are necessary to confirm these findings and further elucidate the underlying mechanisms involved. Vitamin D supplementation could represent a possible therapeutic strategy for preventing or managing NIU if substantiated. Clinicians should consider screening for and addressing vitamin D deficiency in patients with or at risk for NIU.

First drug-checking study at an electronic festival and fentanyl detection in the central region of Mexico.

BACKGROUND: Perception of drug adulteration has increased in Mexico, but there is little research on adulterants and toxicity. The aim of this study was to identify drug composition in an electronic music outdoor festival nearby Mexico City. METHODS: The participants completed a questionnaire with demographic data, harm reduction strategies, drug-use patterns, history, and the drug they expected to find. We took a small sample of each substance and prepared it for drug checking. A two-section drug testing station was placed within the grounds of the festival. Interaction with participants occurred at the front part. Drug checking was conducted at the rear part. The service was free of charge, voluntary and confidential. Forty persons aged 22 to 48 years participated (mode = 28), of which 92.5% were male, most (82.5%) were single. Through the Substance Analysis Program of "ReverdeSer Collective," we conducted the testing with the attendants that provided 51 drug samples, following ethical and biosafety protocols. We used colorimetry, Fourier Transform Infrared Spectroscopy, and fentanyl immunoassay strips for sample analysis. RESULTS: Substances of choice among attendants were psychostimulants (MDMA and other amphetamine-like drugs) and hallucinogens. Most samples contained what the users expected plus adulterants. Main adulterants were methylene-dioxy-ethyl-amphetamine, methylene-dioxy-propyl-amphetamine, hydroxyamphetamine, and the selective serotonin reuptake inhibitor venlafaxine. Fentanyl was present in 2 out of 4 cocaine samples and in 14 of the 22 confirmed MDMA samples. CONCLUSIONS: Some of the adulterants found pose serious health risks, especially fentanyl, amphetamine-like substances, and venlafaxine. Therefore, it is urgent to monitor these adulterants at electronic music festivals and to implement prevention, treatment, and harm reduction public policies. Naloxone distribution and drug-assisted therapies should be part of government programs in Mexico.

Management of post-ERCP duodenal perforations: experience at Hospital Juárez de México.

BACKGROUND: Endoscopic retrograde cholangiopancreatography (ERCP) is an endoscopic study in which the duodenum is observed laterally, and the bile duct is instrumented. There are several indications and complications in the procedure. OBJECTIVE: To determine the incidence of duodenal perforations, using the Stapfer classification in the Hospital Juárez de Mexico over a period of 5 years, as well as the management implemented in such cases. METHOD: The study was carried out at the Hospital Juárez de Mexico of the Ministry of Health. All patients who underwent ERCP between January 1, 2017, to May 30, 2022 were included. RESULTS: 485 ERCP were performed in the study period. Incidence of 1.6% post-ERCP duodenal perforation. The average age of the subjects 56.37 years. In-hospital stay of post-ERCP perforations averaged 9.37 days. The time of the endoscopic study at the time of the surgical procedure is 10 h on average. CONCLUSIONS: Post-ERCP duodenal perforation is a complication that occurs with a low incidence, it tends to increase the number of days of in-hospital stay and increases morbimortality of patients; therefore, it is important to be always alert.

ANTECEDENTES: La colangiopancreatografía retrógrada endoscópica (CPRE) es un estudio endoscópico en el cual se observa lateralmente el duodeno y se instrumenta la vía biliar. Existen diversas indicaciones y complicaciones en el procedimiento. OBJETIVO: Determinar la incidencia de perforaciones duodenales utilizando la clasificación Stapfer para ubicación anatómica en el Hospital Juárez de México en un periodo de 5 años, así como el manejo implementado en dichos casos. MÉTODO: El estudio se realizó en el Hospital Juárez de México de la Secretaría de Salud. Se incluyeron todos los pacientes sometidos a CPRE entre el 1 de enero de 2017 y el 30 de mayo de 2022. RESULTADOS: Se realizaron 485 CPRE en el periodo de estudio. Hubo una incidencia del 1.6% de perforación duodenal post-CPRE. El promedio de edad de los sujetos fue de 56.37 años. La estancia hospitalaria de los pacientes con perforación post-CPRE fue en promedio de 9.37 días. El tiempo del estudio endoscópico al momento de realizar el procedimiento quirúrgico fue de 10 h en promedio. CONCLUSIONES: La perforación duodenal post-CPRE es una complicación que ocurre con una baja incidencia, suele aumentar los días de estancia intrahospitalaria y aumenta la morbimortalidad de los pacientes, y por ello es importante estar siempre alerta.

Metacognitive skills of undergraduate university students: study based on three colombian institutions

Objective: The objective of this study was to determine the level of development of metacognitive skills of undergraduate students in Colombia and to establish whether there are differences by institution of origin, or by gender or by semester. Method: A quantitative study and a non-probabilistic sampling was conducted. A total of 1.199 students from three universities participated, one public and distance modality; and the other two private and face-to-face modality. The Metacognitive Awareness Inventory (MAI) was used to determine metacognitive skills. Results: At a general level, Colombian university students present a high level of development of their metacognitive skills with an average of 3,86 on a 5-point scale. When analyzing the abilities of the students according to the university of origin, the Kruskal-Wallis test shows that there are significant differences (p<0,05) in favor of the students in the distance modality. The Mann-Whitney U test allowed us to conclude that there are no significant differences by gender, although women have higher means (M = 3,88) than men (M = 3,83). It was possible to establish through the Spearman correlation that there are significant and negative differences in the level of metacognitive skills according to the semester of the students, as their skills decrease as they progress. Conclusions: Although students have a good level of development of their metacognitive skills it is required to strengthen especially evaluation processes. Students trained in virtual distance learning methodology showed a higher degree of development of metacognitive skills than those in face-to-face mode, which could be explained by a greater development of self-regulation as an indicator of maturity for learning.

Objetivo: El objetivo de este estudio fue determinar el nivel de desarrollo de las habilidades metacognitivas de estudiantes de pregrado en Colombia y establecer si existen diferencias por institución de procedencia, o por género o por semestre. Método: Se realizó un estudio cuantitativo y un muestreo no probabilístico. Participaron 1199 estudiantes de tres universidades, una de carácter público y modalidad distancia; y las otras dos privadas y modalidad presencial. Se utilizó el Metacognitive Awareness Inventory (MAI) para determinar las habilidades metacognitivas. Resultados: A nivel general los estudiantes universitarios colombianos presentan un alto nivel de desarrollo de sus habilidades metacognitivas con una media de 3,86 en una escala de 5 puntos. Al analizar las habilidades de los estudiantes según la universidad de procedencia, la prueba de KruskalWallis muestra que existen diferencias significativas (p<0,05) a favor de los alumnos en la modalidad a distancia. La prueba U de Mann-Whitney permitió concluir que no hay diferencias significativas por género, aunque las mujeres tienen medias más altas (M = 3,88) que los hombres (M=3,83). Se pudo establecer a través de la correlación de Spearman que existen diferencias significativas y negativas en el nivel de habilidades metacognitivas según el semestre de los estudiantes, a medida que avanzan sus habilidades disminuyen. Conclusiones: Aunque los estudiantes tienen un buen nivel de desarrollo de sus habilidades metacognitivas se requiere fortalecer especialmente procesos de evaluación. Los estudiantes que se forman en metodología a distancia virtual mostraron un mayor grado de desarrollo de las habilidades metacognitivas que los de modalidad presencial, lo que podría explicarse por un mayor desarrollo de la autonomía como indicador de madurez para el aprendizaje.

Nanosilica and copper ecotoxicity in Gambusia holbrooki fish.

When silica nanoparticles (SiNP) reach the water bodies interact with the already existing pollutants in the environments. This study aimed to evaluate the ecotoxicity of SiNP under the presence/absence of Cu in mosquitofish (Gambusia holbrooki). Fish were exposed to 0, 10 and 100 mg SiNP L-1, alone or mixed with Cu (0.25 mg L-1). After 96 h, the amount of colony forming units (CFU) of bacteria living on the skin mucus was analysed, and oxidative stress, tissue damage enzymes, and neurotoxicity were evaluated. We observed a reduction in CFU when Cu was present in the media. The liver was the target organ, evidencing a decrease in tissue damage enzymatic activities, activation of the antioxidant system in all treatments, and lipid oxidative damage when the SiNP and Cu were mixed. Overall, SiNP ecotoxicity was proved, which could also be enhanced by the presence of ubiquitous elements such as metals.