IFN-γ-Preconditioned Human Gingival-Derived Mesenchymal Stromal Cells Inhibit Plasmacytoid Dendritic Cells via Adenosine.

Plasmacytoid dendritic cells (pDCs) are vital players in antiviral immune responses because of their high levels of IFN-α secretion. However, this attribute has also implicated them as critical factors behind the immunopathogenesis of inflammatory diseases, and no currently available therapy can efficiently inhibit pDCs' aberrant activation. Mesenchymal stromal cells (MSCs) possess stromal immunomodulatory functionality, regulating immune cell activation through several mechanisms, including the adenosinergic (CD39/CD73/adenosine) pathway. The IFN-γ preconditioning of bone marrow MSCs improves their inhibitory properties for therapy applications; however, isolating human gingival tissue-derived MSCs (hGMSCs) is more accessible. These cells have shown better immunomodulatory effects, yet the outcome of IFN-γ preconditioning and its impact on the adenosinergic pathway has not been evaluated. This study first validated the immunoregulatory properties of primary-cultured hGMSCs, and the results showed that IFN-γ preconditioning strengthens CD39/CD73 coexpression, adenosine production, and the regulatory properties of hGMSC, which were confirmed by describing for the first time their ability to reduce pDC activation and their IFN-α secretion and to increase the frequency of CD73+ pDC. In addition, when CD73's enzymatic activity was neutralized in hGMSCs, adenosine production and the IFN-γ preconditioning effect were restrained. This evidence might be applied to design hGMSCs- and adenosine-based immunotherapeutic strategies for treating inflammatory disorders that are associated with pDC overactivation.

Levels of Small Extracellular Vesicles Containing hERG-1 and Hsp47 as Potential Biomarkers for Cardiovascular Diseases.

The diagnosis of cardiovascular disease (CVD) is still limited. Therefore, this study demonstrates the presence of human ether-a-go-go-related gene 1 (hERG1) and heat shock protein 47 (Hsp47) on the surface of small extracellular vesicles (sEVs) in human peripheral blood and their association with CVD. In this research, 20 individuals with heart failure and 26 participants subjected to cardiac stress tests were enrolled. The associations between hERG1 and/or Hsp47 in sEVs and CVD were established using Western blot, flow cytometry, electron microscopy, ELISA, and nanoparticle tracking analysis. The results show that hERG1 and Hsp47 were present in sEV membranes, extravesicularly exposing the sequences 430AFLLKETEEGPPATE445 for hERG1 and 169ALQSINEWAAQTT- DGKLPEVTKDVERTD196 for Hsp47. In addition, upon exposure to hypoxia, rat primary cardiomyocytes released sEVs into the media, and human cardiomyocytes in culture also released sEVs containing hERG1 (EV-hERG1) and/or Hsp47 (EV-Hsp47). Moreover, the levels of sEVs increased in the blood when cardiac ischemia was induced during the stress test, as well as the concentrations of EV-hERG1 and EV-Hsp47. Additionally, the plasma levels of EV-hERG1 and EV-Hsp47 decreased in patients with decompensated heart failure (DHF). Our data provide the first evidence that hERG1 and Hsp47 are present in the membranes of sEVs derived from the human cardiomyocyte cell line, and also in those isolated from human peripheral blood. Total sEVs, EV-hERG1, and EV-Hsp47 may be explored as biomarkers for heart diseases such as heart failure and cardiac ischemia.

Detection of Asymptomatic Sickle Cell Hemoglobin Carriers and Fetal Hemoglobin Regulating Genetic Variants in African Descendants from Oaxaca, Mexico.

Sickle cell anemia has been classified as a noninfectious neglected tropical disease and, although not exclusively, affects African descendants more frequently. This study aimed to detect asymptomatic sickle cell hemoglobin carriers (HbAS) in marginalized and vulnerable populations during a public health screening in African descendants from Oaxaca, Mexico, and to validate an amplification refractory mutation system (ARMS)-PCR methodology to detect fetal-hemoglobin (HbF)-regulating genetic variants in BCL11A toward affordable routine association of single nucleotide variants (SNVs) with HbF concentrations. To this aim, hemoglobin variants were detected by acidic citrate agar and alkaline cellulose acetate electrophoreses. SNVs in the hemoglobin subunit beta gene (HBB) were identified by the ß-globin mutation detection assay (ß-GMDA) and ARMS-PCR, respectively, and validated by Sanger sequencing. The association between genotypes and HbF concentrations was evaluated using Spearman's correlation coefficient. The results obtained during a directed screening in 140 self-identified African descendants revealed 42 HbS-carriers (30%), of which 39 showed normal total hemoglobin concentrations (92.8%), only 3 presented anemia (7.2%), and 9 showed quantifiable HbF concentration (21.4%). As validated by Sanger sequencing, the designed ARMS-PCR efficiently detected homozygous and heterozygous variants in BCL11A. In a cohort of 42 heterozygous (HbAS) and 27 healthy (HbAA) individuals from the same population, only one SNV (rs766432) showed statistically significant association with increasing HbF concentration, and two new unrelated homozygous silent variants were identified. This study reveals the need to raise coverage of HbS screening in vulnerable populations and shows a feasible low-cost ARMS-PCR methodology to determine the presence of SNVs in quantitative trait loci affecting HbF.

Influence of starch-protein interactions on the digestibility and chemical properties of a 3D-printed food matrix based on salmon by-product proteins.

This study evaluated the influence of starch-protein interactions on the chemical properties and digestibility of a 3D-printed gel based on salmon by-product protein. Changes in the starch-protein interactions of the stable cornstarch (CS, 15%) and salmon protein isolate (SPI, 4%-12%) printable gels during the in vitro gastrointestinal digestion process were studied by principal component analysis. Protein-rich printed gels increased resistant starch content by 18.05%. Changes in chemical properties and the starch-protein concentration of the gels during the digestion process were highly correlated. The CS-SPI gels in the gastric and intestinal phases exhibited lower α-helix/ß-sheet ratio and fluorescence intensity values, whereas surface hydrophobicity increased. This resulted in more ordered structures with a high level of molecular interaction that inhibited enzymatic hydrolysis. This study provides crucial information about the transformations of starch-protein interactions during the digestibility of 3D-printed food matrices as an alternative source of nutrients with a high nutritional quality.

Effects of Dietary Supplementation of Essential Oils, Lysozyme, and Vitamins' Blend on Layer Hen Performance, Viral Vaccinal Response, and Egg Quality Characteristics.

Maintaining respiratory tract health is crucial for layers, impacting gut health, laying performance, and egg quality. Viral diseases and standard vaccinations can compromise tracheal epithelium function, leading to oxidative stress. This study assessed the impact of a blend of feed additives, predominantly lysozyme (L), essential oils (EO), and vitamins (VIT) (referred to as L + EO + VIT), on young layers during an oral vaccination schedule. The supplementation significantly enhanced antibody titers for Newcastle Disease Virus (NDV) and Infectious Bronchitis Virus (IBV) after vaccination, trachea functionality and intestinal health in the jejunum, increased egg production, and exhibited a trend toward higher egg weight. Although feed intake showed no significant difference, egg quality remained consistent across experimental groups. Moreover, L + EO + VIT supplementation elevated total phenolic content in eggs, improving oxidative stability in both fresh and stored eggs, particularly under iron-induced oxidation. Notably, it substantially reduced yolk lipid peroxidation and albumen protein carbonyls. In conclusion, water supplementation with L + EO + VIT may enhance humoral immune response to IBV and NDV, positively impacting hen productivity. These findings indicate improved tracheal function and enhanced oxidative stability, emphasizing the potential of this blend in promoting overall health and performance in layers.

Harnessing ChatGPT and GPT-4 for evaluating the rheumatology questions of the Spanish access exam to specialized medical training.

The emergence of large language models (LLM) with remarkable performance such as ChatGPT and GPT-4, has led to an unprecedented uptake in the population. One of their most promising and studied applications concerns education due to their ability to understand and generate human-like text, creating a multitude of opportunities for enhancing educational practices and outcomes. The objective of this study is twofold: to assess the accuracy of ChatGPT/GPT-4 in answering rheumatology questions from the access exam to specialized medical training in Spain (MIR), and to evaluate the medical reasoning followed by these LLM to answer those questions. A dataset, RheumaMIR, of 145 rheumatology-related questions, extracted from the exams held between 2010 and 2023, was created for that purpose, used as a prompt for the LLM, and was publicly distributed. Six rheumatologists with clinical and teaching experience evaluated the clinical reasoning of the chatbots using a 5-point Likert scale and their degree of agreement was analyzed. The association between variables that could influence the models' accuracy (i.e., year of the exam question, disease addressed, type of question and genre) was studied. ChatGPT demonstrated a high level of performance in both accuracy, 66.43%, and clinical reasoning, median (Q1-Q3), 4.5 (2.33-4.67). However, GPT-4 showed better performance with an accuracy score of 93.71% and a median clinical reasoning value of 4.67 (4.5-4.83). These findings suggest that LLM may serve as valuable tools in rheumatology education, aiding in exam preparation and supplementing traditional teaching methods.

Supervisión de salud de niños/as con Síndrome de Down realizado por enfermera, desde la mirada de sus cuidadores / Caregivers' perspectives about the health supervision of children with Down Syndrome carried out by a nurse

INTRODUCCION: Los niños con Síndrome de Down (SD) y sus cuidadores requieren de una atención de salud multidisciplinaria que responda a sus necesidades desde una perspectiva integral. OBJETIVO: conocer las experiencias y expectativas que tienen los cuidadores de niños con SD en relación con los cuidados brindados por la enfermera durante el control de supervisión de salud infantil. METOLOGÍA: Estudio cualitativo fenomenológico, muestra intencionada de casos por criterios conformada por 11 cuidadores de niños con SD entre 0 y 9 años, que recibieron prestaciones en el Control de Salud Infantil. Se realizaron entrevistas semiestructuradas, los datos se analizaron siguiendo el esquema de reducción progresiva. Contó con la aprobación de la Dirección de Carrera de Enfermería, Universidad Santo Tomás (Temuco-Chile) (Acta 07-2018). RESULTADOS: se generaron dos categorías: "Experiencia de atención otorgada por la enfermera" y "Expectativas vinculadas a la atención proporcionada por la enfermera", se develó que los cuidadores de niños con SD perciben que los cuidados brindados por la enfermera durante la atención son insuficientes en relación con las necesidades que estos niños presentan. Esto estaría vinculado con la falta de conocimientos sobre esta condición y su abordaje integral. Con respecto a sus expectativas, refieren necesidad de acompañamiento, apoyo, educación y de profesionales de enfermería capacitados. CONCLUSIONES: urge abordar las brechas con respecto a las competencias del profesional de enfermería que realiza controles de salud del niño para poder entregar una atención de calidad a ellos y sus familias.

INTRODUCTION: Children with Down Syndrome (DS) and their caregivers require multidisciplinary health care that meets their needs from a comprehensive perspective. OBJECTIVE: to know the experiences and expectations that caregivers of children with DS have concerning the care provided by the nurse in the Child Health Supervision Attention. METHOD: A qualitative phenomenological study was conducted, an intentional sample of cases by criteria made up of 11 caregivers of children with DS between 0 and 9 years of age, who received benefits at the Child Health Control. Semi-structured interviews were carried out; the data were analyzed following the progressive reduction scheme. It had the approval of the Nursing Career Department, Santo Tomás University (Temuco-Chile) (Acta 07-2018). RESULTS: two categories were generated: "Experience of care provided by the nurse" and "Expectations linked to the care provided by the nurse", it was revealed that caregivers of children with DS perceive that the care provided by the nurse during the control is insufficient with the children's needs also, data showed a link to the lack of knowledge about this condition and its comprehensive approach. Regarding their expectations, they report the need for accompaniment, support, and education from the nurse, in addition to being a trained professional. CONCLUSION: It is urgent to address the gaps regarding the competencies of the nursing professional who performs child health checks to deliver quality care to them and their families.

Three-Dimensional Printing Parameter Optimization for Salmon Gelatin Gels Using Artificial Neural Networks and Response Surface Methodology: Influence on Physicochemical and Digestibility Properties.

This study aimed to optimize the 3D printing parameters of salmon gelatin gels (SGG) using artificial neural networks with the genetic algorithm (ANN-GA) and response surface methodology (RSM). In addition, the influence of the optimal parameters obtained using the two different methodologies was evaluated for the physicochemical and digestibility properties of the printed SGG (PSGG). The ANN-GA had a better fit (R2 = 99.98%) with the experimental conditions of the 3D printing process than the RSM (R2 = 93.99%). The extrusion speed was the most influential parameter according to both methodologies. The optimal values of the printing parameters for the SGG were 0.70 mm for the nozzle diameter, 0.5 mm for the nozzle height, and 24 mm/s for the extrusion speed. Gel thermal properties showed that the optimal 3D printing conditions affected denaturation temperature and enthalpy, improving digestibility from 46.93% (SGG) to 51.52% (PSGG). The secondary gel structures showed that the ß-turn structure was the most resistant to enzymatic hydrolysis, while the intermolecular ß-sheet was the most labile. This study validated two optimization methodologies to achieve optimal 3D printing parameters of salmon gelatin gels, with improved physicochemical and digestibility properties for use as transporters to incorporate high value nutrients to the body.

Aproximación al ciberdelincuente desde la perspectiva del control social / Approaching the cybercriminal from a perspective of social control / Abordagem do criminoso cibernético a partir de uma perspectiva de controle social

El presente artículo aporta un acercamiento al ciberdelincuente identificando las características comunes en la personalidad de quienes delinquen en este escenario. Para llevar a cabo la investigación, se tomó una muestra de diecinueve expertos que forman parte de la Dirección de Investigación Criminal e INTERPOL, abordados por entrevista en profundidad. Los datos obtenidos fueron tratados desde un diseño hermenéutico con énfasis en la teoría fundamentada, por medio de tres fases elaboradas en análisis matricial de codificación abierta, selectiva y teórica; a partir de las cuales se establecen algunas de las tácticas del ciberdelincuente desplegadas en el ciberespacio a través de tecnologías de la información y las comunicaciones; su descripción desde el modelo big five y se identifican algunas de sus características como la falta de empatía, escrúpulos, incapacidad para el control de emociones, confianza y capacidad de innovar sus modus operandi(Sánchez y Robles, 2013). Finalmente, desde las teorías del control social se han estudiado el ciberdelito y los actos del ciberdelincuente de una manera formal que vela por encontrar estrategias de control del Estado, según González (2010), o informal, que busca los motivos que conducen a cometer delitos, como lo afirma López (2015), a partir de lo cual, al final, se presentan algunas recomendaciones.

This article provides an approach to cybercriminals by identifying the common characteristics in the personality of those who commit crimes in this scenario. In order to carry out the research, a sample of nineteen experts from the Criminal Investigation Directorate and INTERPOL were interviewed in depth. The data obtained were treated based on a hermeneutic design with emphasis on grounded theory, by means of three phases elaborated in matrix analysis of open, selective and theoretical coding; from which some of the tactics of cybercriminals deployed in cyberspace through information and communication technologies are established; their description based on the big five model and the identification of several of their characteristics such as lack of empathy, scruples, the inability to control emotions, confidence and the ability to innovate their modus operandi (Sánchez y Robles, 2013). Finally, theories of social control have studied cybercrime and the acts of cybercriminals in a formal way that seeks to find strategies to control the State, according to González (2010), or informally, seeking the motives that lead to committing crimes, as stated by López (2015), on the basis of which, at the end, some recommendations are presented.

Este artigo traz uma abordagem sobre os cibercriminosos, identificando as características comuns na personalidade de quem comete crimes nesse cenário. Para a realização da investigação foi recolhida uma amostra de dezanove peritos que integram a Direcção de Investigação Criminal e a INTERPOL, abordados através de entrevista em profundidade. Os dados obtidos foram tratados a partir de um desenho hermenêutico com ênfase na teoria fundamentada, por meio de três fases desenvolvidas em análise matricial de codificação aberta, seletiva e teórica; a partir da qual se estabelecem algumas das táticas cibercriminosas implantadas no ciberespaço através das tecnologias de informação e comunicação; A sua descrição baseia-se no modelo dos big five e são identificadas algumas das suas características, como a falta de empatia, escrúpulos, incapacidade de controlar emoções, confiança e capacidade de inovar o seu modus operandi (Sánchez y Robles, 2013). Por fim, a partir das teorias de controle social, o cibercrime e os atos dos cibercriminosos têm sido estudados de forma formal, que busca encontrar estratégias de controle do Estado, segundo González (2010), ou informalmente, que busca os motivos que levam ao cometimento dos crimes. , conforme afirma López (2015), a partir do qual, ao final, são apresentadas algumas recomendações.

Emotional exhaustion in nursing students. A multicenter study.

OBJECTIVE: To know emotional exhaustion in nursing students from four universities. METHOD: Cross-sectional, correlational study, carried out in Chile and Spain (2017-2018), with 1,368 students answering a self-applied instrument (sociodemographic/academic variables and the Emotional Exhaustion scale). Analysis with Stata 15, according to variables: Chi2 tests, Wilcoxon rank sum test (Mann Whitney U test), analysis of variance and multiple regression; confidence level 95% and significance 5% (p < 0.05). Approved by the Ethics Committee, Universidad de Girona. RESULTS: Academic variables and perceived stress with Quite Much/Much classification: Exams, Problem-Based Learning, Laboratory/Simulation. Statistically significant differences in emotional exhaustion, according to sex, dependent people, workers, commuting time >30 minutes. Greater emotional exhaustion when taking courses for the second time and in academic activities where they declare perceived stress as Quite Much/Much (p < 0.005). CONCLUSION: All students present mean level of emotional exhaustion (>26 and <37 points). The variables sex and having dependents are relevant aspects. Stress perceived by methodologies is significantly related to levels of emotional exhaustion.

Aprendizaje basado en problemas en modalidad virtual con tutor par en pandemia: Opinión estudiantes primer año de medicina

Propósito del estudio: Conocer la experiencia de estudiantes de primer año de la carrera de Medicina, Universidad Austral de Chile con respecto a tutorías virtuales de ABP realizadas por tutores pares, durante el segundo semestre del 2021. Material y Método: Investigación cuantitativa y cualitativa, transversal, descriptiva. Muestra no probabilística, conformada por 45 estudiantes de medicina que participaron en ABP virtual con tutores/as pares. Recolección de datos mediante encuesta de opinión anónima y voluntaria (Google Forms), compuesta por 2 ámbitos: metodología y rol del tutor/a, considerando preguntas abiertas relacionadas con aspectos facilitadores y obstaculizadores. Análisis de datos cuantitativo con programa Excel, utilizando estadística descriptiva con medidas de frecuencia. Los cualitativos con reducción progresiva. Estudio aprobado por Comité Ético Científico, Servicio de Salud Valdivia. Resultados: Existe un alto grado de satisfacción en los dos ámbitos. Tanto en los resultados cualitativos y cuantitativos los participantes valoran positivamente el desempeño del rol del tutor par, destacando: empatía, compromiso, confianza, facilitador, proporciona retroalimentación y buen ambiente de aprendizaje, permitiendo el aprender en forma colaborativa. A diferencia de lo cuantitativo en lo cualitativo se identifica con mayor frecuencia como factores obstaculizadores, la mala conexión a internet, excesiva carga curricular y desconocimiento de la metodología por parte del tutor. Conclusiones: Si bien la preparación de tutores pares para el desarrollo de las tutorías de ABP es fundamental, más aún lo es para la implementación en modalidad virtual, ya que se enfrentan a otros desafíos como el manejo de plataformas y lograr una comunicación efectiva que permita aprender colaborativamente.

Purpose of the study: To know the experience of first-year medical students at Universidad Austral de Chile regarding virtual Problem-Based learning (PBL) tutorials carried out by peer tutors during the second semester of 2021. Methods: Quantitative and qualitative research, transversal, descriptive. The non-probabilistic sample consisted of 45 medical students who participated in virtual PBL tutorials with peer tutors. Data collection through an anonymous and voluntary opinion survey comprised two areas: methodology and role of the tutor, considering open questions related to facilitating and hindering aspects. Quantitative data analysis was performed using descriptive statistics with frequency measurements. The qualitative ones with progressive reduction. Study approved by the Scientific Ethics Committee, Valdivia Health Service. Results: There is a high degree of satisfaction in all three areas. Both in the qualitative and quantitative results, the participants positively value the performance of the peer tutor, highlighting empathy, commitment, trust, facilitation, feedback, and a good learning environment, allowing collaborative learning. Unlike the quantitative, the qualitative is more frequently identified as hindering factors, poor internet connection, excessive curricular load, and lack of knowledge about the methodology by the tutor. Conclusions: Although the preparation of peer tutors for PBL tutorials is essential, it is even more critical in virtual mode since they face challenges such as managing virtual platforms and achieving effective communication that allows learning collaboratively

Experiências dos prestadores de cuidados a idosos institucionalizados durante a pandemia de covid-19: uma perspectiva qualitativa / Experiences of providers of care for institutionalized elderly people during the covid-19 pandemic: a qualitative perspective / Vivencias de cuidadoras de personas mayores institucionalizadas, durante la pandemia por covid 19: mirada cualitativa

RESUMO Objetivo: Desvelar as vivências de cuidadores de idosos que residem em instituições de longa permanência, durante o confinamento no contexto da pandemia de Covid-19. Método: Método: pesquisa qualitativa, descritiva, através de estudo de caso intrínseco. Amostra intencionada por critério e conveniência de seis cuidadores, Região de Los Ríos, Chile, entrevista semiestruturada foi realizada no ano de 2021. Análise através de comparação constante e redução progressiva. A validade foi garantida pelo cumprimento de critérios de rigor, triangulação por especialistas. Resultados: 489 unidades de significado deram origem a quatro grupos temáticos: Significado de ter vivido a experiência, fatores facilitadores, fatores dificultadores e recomendações. Emergiram dois domínios: Contribuição dos cuidadores para o reforço do seu papel durante a pandemia e Contribuição para o reforço da gestão. Conclusões: permite reconhecer e validar o vínculo afetivo, o empenho e a vocação dos prestadores de cuidados, aspectos fundamentais a reforçar através do aconselhamento e da formação para garantir a qualidade dos cuidados.

ABSTRACT Objective: Uncover the experiences of caregivers of elderly people living in long-term care institutions, during confinement in the context of the Covid-19 pandemic. Method: Qualitative, descriptive research, through an intrinsic case study. Intentional sample by criteria and convenience of six caregivers, Los Ríos Region, Chile; a semi-structured interview was carried out in 2021. Analysis applying the constant comparative method and progressive focusing approach. Validity was ensured by compliance with the criteria of rigor and researcher triangulation. Results: 489 units of meaning gave rise to four thematic groups: Meaning of having lived the experience, facilitating factors, hindering factors and recommendations. Two domains emerged: Contribution of caregivers to strengthening their role during the pandemic and Contribution to strengthening management. Conclusions: it allows recognizing and validating the emotional bond, commitment and vocation of care providers, key aspects to be reinforced through counseling and training to guarantee the quality of care.

RESUMEN Objetivo: develar las vivencias de cuidadores de personas mayores que residen en instituciones de larga permanencia, durante el confinamiento en contexto de pandemia por Covid-19. Método: investigación cualitativa, descriptiva, mediante estudio intrínseco de casos. Muestra intencionada por criterios y conveniencia de seis cuidadoras, Región de Los Ríos, Chile, se realizó entrevista semiestructurada, en el año 2021. Análisis a través de comparación constante y reducción progresiva. Se cauteló validez cumpliendo criterios de rigor, triangulación por expertos. Resultados: 489 unidades de significado originaron cuatro núcleos temáticos: Significado de haber vivido la experiencia, factores facilitadores del trabajo, factores que lo dificultan y recomendaciones. Emergieron dos dominios: Aportes de las cuidadoras para fortalecer su rol durante la pandemia y Contribución para fortalecer la gestión. Conclusiones: permite reconocer y validar el vínculo afectivo, compromiso y vocación de las cuidadoras, aspectos fundamentales a fortalecer mediante consejería y capacitación para asegurar la calidad de los cuidados.

Emotional exhaustion in nursing students. A multicenter study / Fadiga emocional em estudantes de enfermagem. Estudo multicêntrico / Cansancio emocional en estudiantes de enfermería. Estudio multicéntrico

ABSTRACT Objective: To know emotional exhaustion in nursing students from four universities. Method: Cross-sectional, correlational study, carried out in Chile and Spain (2017-2018), with 1,368 students answering a self-applied instrument (sociodemographic/academic variables and the Emotional Exhaustion scale). Analysis with Stata 15, according to variables: Chi2 tests, Wilcoxon rank sum test (Mann Whitney U test), analysis of variance and multiple regression; confidence level 95% and significance 5% (p < 0.05). Approved by the Ethics Committee, Universidad de Girona. Results: Academic variables and perceived stress with Quite Much/Much classification: Exams, Problem-Based Learning, Laboratory/Simulation. Statistically significant differences in emotional exhaustion, according to sex, dependent people, workers, commuting time >30 minutes. Greater emotional exhaustion when taking courses for the second time and in academic activities where they declare perceived stress as Quite Much/Much (p < 0.005). Conclusion: All students present mean level of emotional exhaustion (>26 and <37 points). The variables sex and having dependents are relevant aspects. Stress perceived by methodologies is significantly related to levels of emotional exhaustion.

RESUMO Objetivo: Conhecer a fadiga emocional em estudantes de enfermagem de quatro universidades. Método: Estudo transversal, correlacional, realizado no Chile e na Espanha (2017-2018). Um total de 1.368 alunos respondeu a um instrumento autoaplicável (variáveis sociodemográficas/acadêmicas e Escala de Fadiga Emocional). Análise com Stata 15, de acordo com as variáveis: testes de Chi2, teste dos postos sinalizados de Wilcoxon (Mann Whitney), análise de variância e regressão múltipla; nível de confiança de 95% e significância de 5% (p < 0,05). Aprovado pelo Comitê de Ética da Universidade de Girona. Resultados: Variáveis acadêmicas e estresse percebido destaca Bastante/Muito: Exames, Aprendizagem Baseada em Problemas, Laboratório/Simulação. Diferenças estatisticamente significativas entre fadiga emocional, de acordo com o sexo, dependentes, trabalhadores, tempo de viagem > 30 minutos. Maior fadiga emocional ao cursar disciplinas pela segunda vez e em atividades acadêmicas em que declaram um estresse percebido como Bastante/Muito (p < 0,005). Conclusão: Todos os alunos apresentam fadiga emocional média (>26 e <37 pontos). As variáveis sexo, ter dependentes são aspectos relevantes. O estresse percebido pelas metodologias está significativamente relacionado com os níveis de fadiga emocional.

RESUMEN Objetivo: Conocer cansancio emocional en estudiantes de enfermería de cuatro Universidades. Método: Estudio de corte transversal, correlacional, realizado en Chile y España (2017-2018). Respondieron instrumento autoaplicado 1368 estudiantes (variables sociodemográficas/académicas y escala de Cansancio Emocional). Análisis con Stata 15, según variables: Pruebas de Chi2, sumas y rangos de Wilcoxon (Mann Whitney), análisis de varianza y regresión múltiple; nivel de confianza 95% y significancia 5% (p < 0,05). Aprobado por Comité de Ética, Universidad de Girona. Resultados: Variables académicas y estrés percibido destacan Bastante/Mucho para: Exámenes, Aprendizaje Basado en Problemas, Laboratorio/Simulación. Diferencias estadísticamente significativas entre cansancio emocional según sexo, personas a cargo, trabajadores, tiempo traslado > a 30 minutos. Mayor cansancio emocional al cursar asignaturas por segunda vez y en actividades académicas donde declaran un estrés percibido como Bastante/Mucho (p < 0,005). Conclusión: Todos los estudiantes presentan cansancio emocional medio (>26 y <37 puntos). Las variables sexo y tener personas a cargo son aspectos relevantes. Estrés percibido por metodologías se relaciona de manera importante con niveles de cansancio emocional.

[Problem-Based Learning virtual with a peer tutor in pandemic]. / Aprendizaje basado en problemas en modalidad virtual con tutor par en pandemia: Opinión estudiantes primer año de medicina.

PURPOSE OF THE STUDY: To know the experience of first-year medical students at Universidad Austral de Chile regarding virtual Problem-Based learning (PBL) tutorials carried out by peer tutors during the second semester of 2021. METHODS: Quantitative and qualitative research, transversal, descriptive. The non-probabilistic sample consisted of 45 medical students who participated in virtual PBL tutorials with peer tutors. Data collection through an anonymous and voluntary opinion survey comprised two areas: methodology and role of the tutor, considering open questions related to facilitating and hindering aspects. Quantitative data analysis was performed using descriptive statistics with frequency measurements. The qualitative ones with progressive reduction. Study approved by the Scientific Ethics Committee, Valdivia Health Service. RESULTS: There is a high degree of satisfaction in all three areas. Both in the qualitative and quantitative results, the participants positively value the performance of the peer tutor, highlighting empathy, commitment, trust, facilitation, feedback, and a good learning environment, allowing collaborative learning. Unlike the quantitative, the qualitative is more frequently identified as hindering factors, poor internet connection, excessive curricular load, and lack of knowledge about the methodology by the tutor. CONCLUSIONS: Although the preparation of peer tutors for PBL tutorials is essential, it is even more critical in virtual mode since they face challenges such as managing virtual platforms and achieving effective communication that allows learning collaboratively.

Thermal Inactivation of Salmonella enterica and Listeria monocytogenes in Quesillo Manufactured from Raw Milk.

Quesillo is an artisanal Honduran cheese made from raw milk. During fabrication, curd melting is considered a killing step for pathogenic bacteria. This work was aimed at determining the survival of Salmonella enterica and Listeria monocytogenes on inoculated curd packaged in plastic bags and immersed in a water bath at 48, 54, 60, 65, and 70°C for predetermined times. Survival counts of each pathogen were used to estimate D values by linear regression, and z values were estimated by the linear regression of the D values. S. entericaD values ranged from 4.5 min at 60°C to 0.80 min at 70°C (z = 10.7°C). For L. monocytogenes, D values ranged from 6.08 min at 60°C to 0.90 min at 70°C (z = 11.3°C). Validation of 7-log reduction was performed on inoculated curd heated at 65°C for 34.7 min, and recovering enrichment procedures were used for each pathogen. Neither S. enterica nor L. monocytogenes cells were recovered after the enrichment of samples. The results obtained in this study could be applied by Honduran quesillo processors to improve the safety of their products.

Combining canopy reflectance spectrometry and genome-wide prediction to increase response to selection for powdery mildew resistance in cultivated strawberry.

High-throughput phenotyping is an emerging approach in plant science, but thus far only a few applications have been made in horticultural crop breeding. Remote sensing of leaf or canopy spectral reflectance can help breeders rapidly measure traits, increase selection accuracy, and thereby improve response to selection. In the present study, we evaluated the integration of spectral analysis of canopy reflectance and genomic information for the prediction of strawberry (Fragaria × ananassa) powdery mildew disease. Two multi-parental breeding populations of strawberry comprising a total of 340 and 464 pedigree-connected seedlings were evaluated in two separate seasons. A single-trait Bayesian prediction method using 1001 spectral wavebands in the ultraviolet-visible-near infrared region (350-1350 nm wavelength) combined with 8552 single nucleotide polymorphism markers showed up to 2-fold increase in predictive ability over models using markers alone. The integration of high-throughput phenotyping was further validated independently across years/trials with improved response to selection of up to 90%. We also conducted Bayesian multi-trait analysis using the estimated vegetative indices as secondary traits. Three vegetative indices (Datt3, REP_Li, and Vogelmann2) had high genetic correlations (rA) with powdery mildew visual ratings with average rA values of 0.76, 0.71, and 0.71, respectively. Increasing training population sizes by incorporating individuals with only vegetative index information yielded substantial increases in predictive ability. These results strongly indicate the use of vegetative indices as secondary traits for indirect selection. Overall, combining spectrometry and genome-wide prediction improved selection accuracy and response to selection for powdery mildew resistance, demonstrating the power of an integrated phenomics-genomics approach in strawberry breeding.

Enfermedad de hígado graso no alcohólico y potenciales efectos de los β-glucanos en su tratamiento: Una revisión de literatura

RESUMEN La enfermedad de hígado graso no alcohólico es considerada hoy en día un problema de salud pública. Se caracteriza por la acumulación de ácidos grasos y de triglicéridos en el citoplasma de los hepatocitos, con aumento del peso total del hígado, que va desde una esteatosis hepática no alcohólica (ausencia de inflamación) hasta una esteatohepatitis no alcohólica (presencia de inflamación), fibrosis e incluso hepatocarcinoma. Actualmente, no cuenta con un tratamiento aprobado por agencias regulatorias de la enfermedad y se ha convertido en la enfermedad hepática con mayor prevalencia mundial. Los β-glucanos son homopolisacáridos de glucosa a los que se les atribuyen propiedades para la reducción de grasas debido a que son considerados fibra dietética. En esta revisión de literatura, se resaltó la importancia y los efectos de los β-glucanos en la dieta para su tratamiento como prevención de la enfermedad del hígado graso no alcohólico.

ABSTRACT Non-alcoholic fatty liver disease is considered a public health problem, characterized by the accumulation of fatty acids and triglycerides in the cytoplasm of hepatocytes, resulting in an increase in the total weight of the liver, ranging from a non-alcoholic hepatic steatosis (absence of inflammation) to non-alcoholic steatohepatitis (presence of inflammation), fibrosis and even hepatocarcinoma. Currently, there are no treatments approved by regulatory agencies for the disease, which has led to a high prevalence of liver disease worldwide. The β-glucans are homopolysaccharides of glucose to which fat-reducing properties are attributed since they are considered dietary fiber. The importance and effects of β-glucans in the diet for the prevention of nonalcoholic fatty liver disease are highlighted in this literature review.