Evidence of the protective role of Carvacrol in a retinal degeneration animal model.

Neurodegenerative pathologies affecting the posterior segment of the eye, are characterized by being devastating and responsible for the majority of visual dysfunctions worldwide. These diseases are primarily degenerative, progressing chronically, and can inflict gradual harm to the optic nerve, retinal ganglion cells (RGC), photoreceptors, and other retinal cells. This retinal damage leads to a progressive loss of vision, marking these conditions as a significant health concern worldwide. The intravitreal administration of the phytochemical Carvacrol (CAR) is expected to demonstrate a neuroprotective and antiapoptotic effect on retinal cells, with a specific focus on RGC. This effect will be observed in a retinal degeneration model (RDM) in rabbits induced by cytotoxic and oxidative agents, namely glutamate (GLUT) and L-buthionine-S, R-sulfoximine (BSO). An in vivo study was conducted using New Zealand rabbits in which retinal damage was created to evaluate the effectiveness of CAR. The effectiveness of CAR on the functionality of retinal neuronal cells in RDM was evaluated using pupillary light reflection (PLR). Furthermore, the phytotherapeutic's influence on cell viability was determined through flow cytometry analysis. Finally, the neuroprotective and antiapoptotic capabilities of CAR were specifically scrutinized in RGC through histological studies, quantifying cell survival, and employing immunohistochemical assays to detect the apoptotic index (%) using the TUNEL technique. Our results demonstrated that CAR promoted the recovery of the pupillary contraction profile over time, maintaining the functionality of retinal cells as healthy controls. Additionally, it showed increased cell viability under oxidative and cytotoxic conditions given by GLUT-BSO agents. Finally, we found that CAR protects the survival of RGC and decreases the percentage of apoptotic cells when compared to RDM. CAR demonstrated to have positive effects on the functionality of photoreceptive nerve cells by restoring pupillary contraction. Likewise, it was shown to have neuroprotective and antiapoptotic effects when evaluated in a general and specific way on retinal nerve cells.

Electrification of Transit Buses in the United States Reduces Greenhouse Gas Emissions.

The transportation sector is the largest emitter of greenhouse gas emissions (GHGs) in the United States. Increased use of public transit and electrification of public transit could help reduce these emissions. The electrification of public transit systems could also reduce air pollutant emissions in densely populated areas, where air pollution disproportionally burdens vulnerable communities with high health impacts and associated social costs. We analyze the life cycle emissions of transit buses powered by electricity, diesel, gasoline, and compressed natural gas and model GHGs and air pollutants mitigated for a transition to a fully electric U.S. public transit bus fleet using transit agency-level data. The electrification of the U.S. bus fleet would reduce several conventional air pollutants and has the potential to reduce transit bus GHGs by 33-65% within the next 14 years depending on how quickly the transition is made and how quickly the electricity grid decarbonizes. A levelized cost of driving analysis shows that with falling capital costs and an increase in annual passenger-kilometers of battery electric buses, the technology could reach levelized cost parity with diesel buses when electric bus capital costs fall below about $670 000 per bus.

The impact of pulse repetition frequency on microbubble activity and drug delivery during focused ultrasound-mediated blood-brain barrier opening.

Objective.Pulsed focused ultrasound (FUS) can deliver therapeutics to the brain by using intravenous microbubbles (MBs) to open the blood-brain barrier (BBB). MB emissions indicate treatment outcomes, like BBB opening (harmonics) and damage (broadband). Typically, a pulse repetition frequency (PRF) of 1 Hz is used, but the effect of PRF on MBs is not fully understood. We investigated the effect of PRF on MB activity and tracer delivery.Approach.The effect of PRF (0.125, 0.25, 0.5, 1, and 2 Hz) on MB activity was monitored through harmonic and wideband emissions during FUS sonications of the rat brain at 274.3 kHz. BBB opening was quantified through fluorescence imaging to estimate the concentration of Trypan Blue (TB) dye following a 75-pulse FUS exposure for PRFs of 1 and 0.25 Hz.Main results.At a fixed acoustic pressure, the percentage change in maximum harmonic amplitude compared to the control (PRF = 1 Hz) decreased with increasing PRF, with a median change of 73.8% at 0.125 Hz and -38.3% at 2 Hz. There was no difference in the pressure threshold for broadband emissions between PRFs of 0.25 and 1 Hz. PRF = 0.25 Hz, led to a 68.2% increase in the mean concentration of TB measured after FUS, with a 53.9% increase in the mean harmonic sum, compared with PRF = 1 Hz. Harmonic emissions-based control at PRF = 0.25 Hz yielded similar TB delivery, with less damage at histology, compared with 1 Hz.Significance.For a fixed number of FUS pulses, reducing the PRF was shown to increase the magnitude of harmonic emissions and TB delivery, but not the threshold for broadband emissions. While further research is necessary to understand the mechanisms involved, these results may be useful to improve clinical safety margins and sensitivity to detecting small harmonic signals from cavitating MBs.

New RP-HPLC method for the simultaneous determination of process yield and percentage of encapsulation of Gallein in albumin nanoparticles.

A study was performed for the development and validation of a method of High Performance Liquid Chromatography (HPLC) for the identification and simultaneous quantification of Gallein and Human Serum Albumin (HSA). In addition, this work presents the development and physicochemical characterization of this new pharmaceutical formulation of HSA nanoparticles loaded with Gallein for potential use in the treatment of Alzheimer's disease. The method was developed with the purpose of determining the performance of the synthesis process of nanoparticles and the efficiency of encapsulation of the drug in the nanosystem. The HPLC mobile phase consisted of ACN:H2O:TEA:H3PO4 (50:49.8:0.1:0.1 v/v/v) pumped at a flow rate of 0.8 mL/min, isocratic mode, and the measurement were carried out at 220 nm. Chromatographic runs were performed on a C18 column (150 × 4.60 mm; 5 µm size particles). The HPLC-method was validated following the International Conference on Harmonisation (ICH) of Technical Requirements for Registration of Pharmaceuticals for Human Use guidelines and was used to simultaneously quantify the two components of the nanoformulation. Thus, the values obtained through the validated method were 43 % for drug encapsulation efficiency (% EE) and the synthesis performance (% yield) was 96 %. Moreover, the nanoformulation was characterized by DLS, the results showed that the average particle size was 217 nm, with a PDI of (0.085 ± 0.005) and a potential Z of -29.7 mV. Therefore, the developed method has proven useful in providing accurate simultaneous measurements of HSA and Gallein from albumin nanoparticles. It is advantageous since it is able to reduce the time and facilitate the determination of Gallein encapsulation efficiency and yield of albumin nanoparticles.

Acetazolamide encapsulation in elastin like recombinamers using a supercritical antisolvent (SAS) process for glaucoma treatment.

Glaucoma, the second most common cause of blindness worldwide, requires the development of new and effective treatments. This study introduces a novel controlled-release system utilizing elastin-like recombinamers (ELR) and the Supercritical Antisolvent (SAS) technique with supercritical CO2. Acetazolamide (AZM), a class IV drug with limited solubility and permeability, is successfully encapsulated in an amphiphilic ELR at three different ELR:AZM ratios, yielding up to 62 %. Scanning electron microscopy (SEM) reveals spherical microparticles that disintegrate into monodisperse nanoparticles measuring approximately 42 nm under physiological conditions. The nanoparticles, as observed via Transmission Electron Microscopy (TEM) and Atomic Force Microscopy (AFM), do not exhibit aggregates, a fact confirmed by the zeta potential displaying a value of -33 mV over a period of 30 days. Transcorneal permeation tests demonstrate a 10 % higher permeation level compared to the control solution, which increases to 30 % after 2 h. Ocular irritation tests demonstrate no adverse effects or damage. Intraocular pressure (IOP) tests conducted on hypertensive rabbits indicate greater effectiveness for all three analyzed formulations, suggesting enhanced drug bioavailability during treatment. Consequently, the combination of recombinant biopolymers and high-pressure techniques represents a promising approach for advancing glaucoma therapy, emphasizing its potential clinical significance.

[Dengue, chikungunya and the mosquito vector at the Southern limit of distribution during the 2023 epidemic, Argentina]. / Dengue, chikungunya y el mosquito vector en el límite sur de distribución durante la epidemia 2023, Argentina.

OBJECTIVES: To monitor the oviposition activity of the mosquito Aedes aegypti and of dengue and chikungunya cases in four localities of temperate Argentina, during the 2023 epidemic. METHODS: During the summer and autumn of 2023, the oviposition activity of the mosquito vector was monitored weekly using ovitraps, and the arrival of cases with dengue or chikungunya in Tandil, Olavarría, Bahía Blanca and Laprida were registered. RESULTS: Monthly variations of the percentage of positive traps were similar in the first three locations; in Laprida the mosquito was not detected. On the contrary, a significant difference was observed in the percentage of total traps that ever tested positive in each locality, being higher in Olavarría (83.3%) than in Bahía Blanca (68.6%) and Tandil (48.7%). Regarding diseases, 18 imported cases of dengue and 3 of chikungunya were registered. In addition, the first autochthonous case of dengue in the region was recorded, being the southernmost until known. CONCLUSION: It is essential to raise awareness and train the members of the health systems of the new regions exposed to Ae. aegypti for early detection of cases, and to the general population to enhance prevention actions.

OBJETIVOS: Monitorear la actividad de oviposición del mosquito Aedes aegypti y de casos de dengue y chikungunya en cuatro localidades de Argentina templada, durante la epidemia del 2023. Métodos: Durante el verano y otoño del 2023, se monitoreó semanalmente mediante ovitrampas la actividad de oviposición del mosquito vector, y se registró el arribo de casos con dengue o chikungunya a Tandil, Olavarría, Bahía Blanca y Laprida. RESULTADOS: La variación mensual del porcentaje de trampas positivas fue similar en las tres primeras localidades; en Laprida no se detectó el mosquito. Por el contrario, se observó una diferencia significativa del porcentaje de trampas que alguna vez resultó positiva en cada localidad, siendo mayor en Olavarría (83%), que en Bahía Blanca (67%) y Tandil (49%). Respecto a las enfermedades, se registraron 18 casos importados de dengue y 3 de chikungunya. Además, se registró el primer caso autóctono de dengue en la región, siendo el más austral hasta el momento. Conclusión: Es imprescindible sensibilizar y capacitar a los integrantes de los sistemas de salud de las nuevas regiones expuestas al Ae. aegypti para la detección temprana de casos, y a la población en general para potenciar las acciones de prevención.

Process evaluation of PsyCovidApp, a digital tool for mobile devices aimed at protecting the mental health of healthcare professionals during the COVID-19 pandemic: a mixed method study.

Introduction: PsyCovidApp, a digital intervention aimed at safeguarding the mental health of healthcare workers during the COVID-19 pandemic, demonstrated in a randomized clinical trial to yield significant improvements solely among healthcare workers undergoing psychotherapy or receiving psychotropic medication. Objectives: (1) To identify contextual factors and mechanisms of action that influenced the impact of PsyCovidApp during the aforementioned trial; (2) To pinpoint enhancements for optimizing its efficacy. Materials and methods: For the first objective, a process evaluation was conducted, amalgamating quantitative techniques (surveying 216 healthcare professionals who had utilized PsyCovidApp during the trial) and qualitative methods (in-depth interviews with 16 healthcare workers). The second objective involved a panel of seven experts, utilizing the RAND-UCLA methodology. Results: The quantitative study (response rate = 40%) revealed that 22% of respondents had not fully accessed the content of PsyCovidApp. The average usage time was 22.7 min/day, being higher (p < 0.05) among consumers of psychotropic medications. Contents related to relaxation and mindfulness were most highly rated. Acceptability and usefulness scores ranged between 7.3-7.5/10 points, with higher ratings (p < 0.05) among women and older healthcare workers. The qualitative study uncovered that the primary barriers to using PsyCovidApp were workload, lack of time, and exhaustion. Its primary mechanisms of action included emotion identification, mental health regulation (e.g., insomnia, intense emotions), and learning of techniques and skills. The expert panel reached a consensus on 29 proposals to optimize PsyCovidApp. Conclusion: The knowledge derived from this study could inform the design and implementation of future similar digital tools.

Do High Doses of Multiple Antibiotics Loaded into Bone Cement Spacers Improve the Success Rate in Staphylococcal Periprosthetic Joint Infection When Rifampicin Cannot Be Employed?

Rifampicin is one of the mainstays in treating staphylococcal prosthetic joint infection (PJI). However, discontinuation due to intolerance, drug interactions, and adverse events is common. Two-stage revision surgery remains the gold standard, with the number of revision arthroplasties steadily increasing. This study aims to evaluate the effectiveness and safety of a novel two-stage revision protocol for staphylococcal prosthetic joint infection (PJI) utilizing bone cement spacers loaded with multiple high doses of antibiotics. Additionally, it seeks to analyze outcomes in patients ineligible for rifampicin treatment. A retrospective review of 43 cases of staphylococcal hip and knee prosthetic joint infections (PJIs) from 2012 to 2020 was conducted. In all instances, a commercial cement containing 1 g of gentamicin and 1 g of clindamycin, augmented with 4 g of vancomycin and 2 g of ceftazidime, was employed to cast a spacer manually after thorough surgical debridement. We report an eradication rate of 82%, with no significant differences observed (p = 0.673) between patients treated with (84%, n = 19) and without rifampicin (79%, n = 24). There were no disparities in positive culture rates (7%), spacer replacement (18%), or survival analysis (p = 0.514) after an average follow-up of 68 months (range 10-147) in the absence of systemic toxicity and surgical complications superimposable to those previously reported. In conclusion, two-stage revision with local high doses of ceftazidime, vancomycin, gentamicin, and clindamycin demonstrates high effectiveness in treating staphylococcal PJIs. Notably, systemic rifampicin does not influence the outcomes. This protocol, with multiple high doses of antibiotics loaded into the bone cement spacer, is presented as a viable and safe alternative for patients unsuitable for rifampicin treatment.

Quantitative melanoma diagnosis using spectral phasor analysis of hyperspectral imaging from label-free slices.

Introduction: Melanoma diagnosis traditionally relies on microscopic examination of hematoxylin and eosin (H&E) slides by dermatopathologists to search for specific architectural and cytological features. Unfortunately, no single molecular marker exists to reliably differentiate melanoma from benign lesions such as nevi. This study explored the potential of autofluorescent molecules within tissues to provide molecular fingerprints indicative of degenerated melanocytes in melanoma. Methods: Using hyperspectral imaging (HSI) and spectral phasor analysis, we investigated autofluorescence patterns in melanoma compared to intradermal nevi. Using UV excitation and a commercial spectral confocal microscope, we acquired label-free HSI data from the whole-slice samples. Results: Our findings revealed distinct spectral phasor distributions between melanoma and intradermal nevi, with melanoma displaying a broader phasor phase distribution, signifying a more heterogeneous autofluorescence pattern. Notably, longer wavelengths associated with larger phases correlated with regions identified as melanoma by expert dermatopathologists using H&E staining. Quantitative analysis of phase and modulation histograms within the phasor clusters of five melanomas (with Breslow thicknesses ranging from 0.5 mm to 6 mm) and five intradermal nevi consistently highlighted differences between the two groups. We further demonstrated the potential for the discrimination of several melanocytic lesions using center-of-mass comparisons of phase and modulation variables. Remarkably, modulation versus phase center of mass comparisons revealed strong statistical significance among the groups. Additionally, we identified the molecular endogenous markers responsible for tissue autofluorescence, including collagen, elastin, NADH, FAD, and melanin. In melanoma, autofluorescence is characterized by a higher phase contribution, indicating an increase in FAD and melanin in melanocyte nests. In contrast, NADH, elastin, and collagen dominate the autofluorescence of the nevus. Discussion: This work underscores the potential of autofluorescence and HSI-phasor analysis as valuable tools for quantifying tissue molecular fingerprints, thereby supporting more effective and quantitative melanoma diagnosis.

Dengue, chikungunya y el mosquito vector en el límite Sur de distribución durante la epidemia 2023, Argentina / Dengue, chikungunya and the mosquito vector at the Southern limit of distribution during the 2023 epidemic, Argentina

Resumen Objetivos : Monitorear la actividad de oviposición del mosquito Aedes aegypti y de casos de dengue y chikun gunya en cuatro localidades de Argentina templada, durante la epidemia del 2023. Métodos : Durante el verano y otoño del 2023, se mo nitoreó semanalmente mediante ovitrampas la actividad de oviposición del mosquito vector, y se registró el arribo de casos con dengue o chikungunya a Tandil, Olavarría, Bahía Blanca y Laprida. Resultados : La variación mensual del porcentaje de trampas positivas fue similar en las tres primeras localidades; en Laprida no se detectó el mosquito. Por el contrario, se observó una diferencia significativa del porcentaje de trampas que alguna vez resultó positiva en cada localidad, siendo mayor en Olavarría (83%), que en Bahía Blanca (67%) y Tandil (49%). Respecto a las enfermedades, se registraron 18 casos importados de dengue y 3 de chikungunya. Además, se registró el primer caso autóctono de dengue en la región, siendo el más austral hasta el momento. Conclusión : Es imprescindible sensibilizar y capacitar a los integrantes de los sistemas de salud de las nue vas regiones expuestas al Ae. aegypti para la detección temprana de casos, y a la población en general para potenciar las acciones de prevención.

Abstract Objectives : To monitor the oviposition activity of the mosquito Aedes aegypti and of dengue and chikungunya cases in four localities of temperate Argentina, during the 2023 epidemic. Methods : During the summer and autumn of 2023, the oviposition activity of the mosquito vector was monitored weekly using ovitraps, and the arrival of cases with dengue or chikungunya in Tandil, Olavarría, Bahía Blanca and Laprida were registered. Results : Monthly variations of the percentage of positive traps were similar in the first three locations; in Laprida the mosquito was not detected. On the con trary, a significant difference was observed in the per centage of total traps that ever tested positive in each locality, being higher in Olavarría (83.3%) than in Bahía Blanca (68.6%) and Tandil (48.7%). Regarding diseases, 18 imported cases of dengue and 3 of chikungunya were registered. In addition, the first autochthonous case of dengue in the region was recorded, being the southern most until known. Conclusion : It is essential to raise awareness and train the members of the health systems of the new regions exposed to Ae. aegypti for early detection of cases, and to the general population to enhance pre vention actions.

Manejo del neonato con piel frágil / Handling neonates with fragile skin / Manejo do neonatos com pele frágil

El presente documento se realizó gracias a la activa participación de diferentes profesionales de la salud, entre ellos, médicos dermatólogos, residentes de dermatología, neonatólogos, licenciadas y enfermeras del Servicio de Neonatología del Centro Hospitalario Pereira Rossell. Se hizo una búsqueda sistemática de la literatura, sin embargo, debido a que la EA es una condición poco frecuente, con un pequeño número de pacientes, la gran mayoría de trabajos publicados son estudios no analíticos o recomendaciones basadas en opinión de expertos (nivel de evidencia 3-4 o D). De esos estudios se han realizado guías y consensos en diferentes países e instituciones. Dicha literatura también ha sido evaluada y analizada por los autores de estas pautas. Este documento busca servir como una guía práctica y no intenta reemplazar el juicio clínico que el profesional debe emplear para cada paciente o situación en particular. Se presenta una variedad de materiales con los que contamos en el medio y alternativas mediante un pautado de estrategia de tratamiento.

Compensación ambiental por la segregación y uso de un área dentro de un refugio de vida silvestre: un caso de estudio empleando coste de oportunidad

Introducción: El establecimiento del Puesto Fronterizo Las Tablillas implica la segregación de 12.12 ha del Refugio Nacional de Vida Silvestre Corredor Fronterizo (RNVSCF), en el norte de Costa Rica. El sitio tiene una larga historia de uso de la tierra y su entorno natural está muy degradado. Este es un caso que se puede abordar desde el coste de oportunidad que se refiere al valor de la alternativa a la que se renuncia al tomar una decisión económica. Objetivo: En este artículo, usamos este precepto para evaluar la compensación por pérdidas en la estructura del hábitat y la biodiversidad si se interrumpiera la dinámica de sucesión dentro de un área silvestre protegida. Métodos: Para encontrar la ganancia neta en compensación requerida por dicha segregación, analizamos la diversidad y composición de la cubertura forestal cercana para pronosticar el ambiente que se perdería si se interrumpieran sus objetivos de conservación (costo de oportunidad). Compensar estas pérdidas requiere un ambiente equivalente, por lo que seleccionamos dos propiedades, entre 27 investigadas adyacentes al RNVSCF, que comparten cobertura forestal, están registradas legalmente y poseen atributos ambientales favorables para el diseño de reservas. Las dos propiedades seleccionadas y el sitio Las Tablillas fueron caracterizados a nivel de atributos geológicos e hidrológicos y de composición biológica de grupos indicadores. Resultados: Ambas propiedades son física y biológicamente favorables para el intercambio. La escogencia de cualquiera aumentaría el área del RNVSCF en más de 100 ha de un ambiente con mejor cobertura, más diversidad y mejor conexión con otras masas forestales que el observado en el sitio de segregación. Esto es una ventaja para el objetivo de conservación del refugio. Conclusión: En este caso, el coste de oportunidad favoreció la ganancia ambiental para la propuesta de compensación y podría ser utilizado para evaluar otras compensaciones que involucren ambientes sensibles o protegidos.

Introduction: The establishment of the Las Tablillas Border Post implies the segregation of 12.12 ha within the National Wildlife Refuge Border Corridor (RNVSCF) in northern Costa Rica. The site has a long land use history, so its environment is highly degraded. This case can be studied from the opportunity cost, which refers to the amount of the alternative given up when making an economic decision. Objective: In this paper, we use this precept to assess the compensation for losses in habitat structure and biodiversity if succession dynamics within a protected wilderness area were interrupted. Methods: To find the net gain in compensation required by this segregation, we analyzed the diversity and composition of nearby forest cover to forecast the environment that would be lost if its conservation objectives were interrupted (opportunity cost). Compensating for these losses requires an equivalent environment, so we selected two properties, among the 27 investigated, that shared forest cover, are located adjacent to the RNVSCF, are registered, and possess other attributes favorable to the design of reserves. The two selected properties and the Las Tablillas site were characterized at the level of geological and hydrological attributes and the composition of indicator groups. Results: Both properties are physically and biologically favorable for the exchange. It would increase the area of the RNVSCF by more than 100 ha of an environment with better coverage, more diversity, and a better connection to other forest masses than the one observed in the segregation site, which is an advantage to the conservation objective of the refuge. Conclusion: In this case, the opportunity cost favored the environmental gain for the offset proposal and could be used to evaluate other compensation involving sensitive or protected environments.

La competencia emocional como predictora de la felicidad en trabajadores sociales / Emotional competence as a predictor of happiness in social workers

Resumen Los trabajadores sociales tienen unas elevadas exigencias laborales como consecuencia, entre otros factores, de la excesiva burocratización de las organizaciones de servicios sociales. Ante esta realidad, durante su proceso formativo, los estudiantes de trabajo social deben desarrollar competencias emocionales para hacer frente a estas demandas profesionales que pueden afectar a su bienestar y rendimiento laboral. Se realizó un estudio descriptivo y correlacional de corte transversal del que participaron 187 estudiantes del primer y segundo curso (n = 105 y n = 82, respectivamente) de Trabajo Social de la Universidad de Málaga (España). El 89.30 % eran mujeres y la edad promedio fue de 20.38 años (DT = 3.35). Se desarrolló un modelo de regresión lineal múltiple para evaluar el papel predictor de la inteligencia emocional (atención emocional, claridad emocional y reparación de las emociones) sobre la felicidad subjetiva percibida en estudiantes de trabajo social. La claridad emocional y la reparación de las emociones fueron predictores significativos positivos de la felicidad subjetiva, mientras que la atención emocional fue un predictor significativo negativo. Los estudiantes y futuros trabajadores sociales tienen que entender y manejar sus estados emocionales, de tal manera que les permita tanto afrontar sus propias frustraciones como constituirse en referentes de los usuarios para imponerse a sus dificultades. Se corrobora la necesidad de fomentar la inteligencia emocional entre los estudiantes y futuros trabajadores sociales, ya que esto constituye un factor de protección que puede aumentar su bienestar y concretamente, su felicidad subjetiva. Las experiencias de afecto negativas que sufren los trabajadores sociales demandan planes de estudio en los que se fomente la inteligencia emocional.

Abstract As a result of the excessive bureaucratization of social service organizations, among other factors, social workers have many job responsibilities (López & Chaparro, 2006; Montagud, 2016). Social workers suffer negative experiences and a high psychosocial risk which affect their well-being and work performance (i. e., emotional fatigue, job dissatisfaction, mental overload, burnout, decrease in happiness, ethical conflicts) (Bunce, Lonsdale, King, Childs, & Bennie, 2019; Caravaca, Carrión, & Pastor, 2018; Grootegoed & Smith, 2018; Prada-Ospina, 2019; Sabater, De Armas, & Cabezas, 2019; Urien, Díez, & Osca, 2019; Vallellano & Rubio-Valdehita, 2018). Given this reality, it is very important that Social Work students develop, during their training process, emotional competencies to cope with such professional demands (Bedoya-Gallego, Buitrago-Duque, & Vanegas-Arbeláez, 2019; Stanley & Bhuvaneswari, 2016). The characteristics of the job require knowledge of the mechanisms that influence the welfare of Social Work students in order to incorporate specific training strategies into teaching plans that prepare them to face the high work demands that can affect their welfare and performance (Blakemore & Agllias, 2019; Borrego-Alés, Vázquez-Aguado, & Orgambídez-Ramos, 2020; Fernández-Berrocal & Extremera, 2009). Despite the considerable shortage of research about the implications of emotional intelligence in the field of Social Work, emotional competence has proven to be essential to explain the personal well-being of students and social intervention professionals, characterized by a high burden of work and high rates of psychological distress and burnout (Bae et al., 2020; Esteban, 2014; Mikulic, Crespi, & Radusky, 2015). A descriptive and correlational cross-sectional study was carried out. 187 students of first (n = 105) and second year (n = 82) of the University of Malaga´s Social Work Degree (Spain) participated. 89.30 % of them was women and the average age was 20.38 years (SD = 3.35). A multiple linear regression model evaluated the predictive role of emotional intelligence (attention, clarity and emotional repair) on the subjective happiness perceived in Social Work students. Emotional clarity and emotional repair were significant positive predictors of subjective happiness, while emotional attention was a significant negative predictor. Of the three independent variables, emotional repair was positioned as the strongest predictor of the perception of subjective happiness. This fact corroborates that emotional repair is especially important to predict the levels of subjective happiness and life satisfaction of university students (Cejudo, López-Delgado, & Rubio, 2016; Extremera, Salguero, & Fernández-Berrocal, 2011). High levels of emotional repair are essential for proper psychological functioning and mental health. In this sense, people tend to develop pleasant activities that distract them and therefore contribute to their happiness (Guerra-Bustamante, León-del-Barco, Yuste-Tosina, López-Ramos, & Mendo-Lázaro, 2019). Individuals who can clearly identify their emotions and believe that they can repair their negative moods minimize the impact of stressful events and generate more positive emotions (Extremera et al., 2011). In social workers, emotions can be understood both as a dynamic resource, whose research can protect professionals and users, and as patterns of organizational and professional relationships, in which emotional states are constituted as phenomena that can be managed and controlled during professional practice (O'Connor, 2020). The need to foster emotional intelligence among students and future social workers is confirmed. It constitutes a protective factor that can increase their well-being and, specifically, their subjective happiness. The negative experiences of affection that social workers suffer demand curricula that promote emotional intelligence. The students and future social workers have to understand and manage their emotional states. It allows them both to face their own frustrations and to become referents for the users when they overcome their difficulties.

Perfiles de utilización de sustratos carbonados de Cladorrhinum (Ascomycota) / Carbon-substrate utilization profiles by Cladorrhinum (Ascomycota)

Abstract Fungi from the genus Cladorrhinum (Ascomycota) are promising agents in the biocontrol of phytopathogens, in the promotion of plant growth, and in the production of enzymes with technological application. We analyzed comparatively the ability of 5 native strains of Cladorrhinum samala and Cladorrhinum bulbillosum with reference strains belonging to the same genus. We used 95 individual carbon sources available in microplates from the Biolog® FF system. Although most of the strains mainly used soluble carbohydrates, the metabolic profile was highly dependent upon each isolate and it revealed intraspecific physiological variability in Cladorrhinum species.

Resumen Los hongos del género Cladorrhinum (Ascomycota) son agentes prometedores en el biocontrol de fitopatógenos, la promoción del crecimiento de las plantas y la producción de enzimas con aplicación tecnológica. En este trabajo se analizaron comparativamente las habilidades de 5 cepas nativas pertenecientes a las especies Cladorrhinum samala y Cladorrhinum bulbillosum con cepas de referencia del mismo género. Se usaron 95 fuentes individuales de carbono, disponibles en microplacas de Biolog® FF system. Aunque la mayoría de las cepas utilizaron principalmente carbohidratos solubles, el perfil metabólico fue altamente dependiente de cada aislamiento y reveló variabilidad fisiológica intraespecífica en las especies de Cladorrhinum.

Distribución de genes de adhesión y regulación de biofilm en Staphylococcus aureus / Distribution of adhesion and biofilm regulation genes in Staphylococcus aureus / Distribuição dos genes de adesão e regulação de biofilme em Staphylococcus aureus

La formación de biofilms es un importante factor de virulencia que contribuye en la cronicidad de los procesos infecciosos producidos por Staphylococcus aureus. Las proteínas presentes en su superficie pueden promover la formación de biofilm. En este estudio se comparó la distribución de genes que codifican para proteínas de adhesión asociadas con la formación de biofilm en cepas resistentes (MRSA) y sensibles a meticilina (MSSA). Al analizar un total de 106 aislados obtenidos de muestras sólidas y líquidas recuperados de un hospital de México, se determinó que la formación de biofilm está asociada de manera significativa a cepas MRSA (83%). Mediante la reacción en cadena de la polimerasa (PCR), se buscó la presencia de nueve genes de adhesinas (eno, ebps, fnbA, fnbB, fib, clfA, clfB, bbp, y cna) y dos de regulación del biofilm (icaA, icaD). Los resultados mostraron que los genes icaA, icaD, eno, ebps, clfA, clfB se amplificaron en todas las cepas mientras que los genes fnbA, fnbB, fib, y bbp tuvieron una distribución variable. Los datos obtenidos muestran por primera vez que la presencia del gen cna se encuentra asociada a cepas MSSA y no productoras de biofilm (p<0,05).

Biofilm formation is an important virulence factor that contributes to the chronicity of the infectious processes caused by Staphylococcus aureus. The proteins on the surface of this bacterium can promote the formation of a biofilm. The distribution of genes encoding adhesion proteins associated with biofilm formation in methicillin-sensitive (MSSA) and methicillin-resistant (MRSA) strains was compared in this study. The analysis of a total of 106 isolates obtained from solid and liquid samples collected from a hospital in Mexico showed that biofilm formation was significantly associated with MRSA strains (83%). The presence of nine adhesine genes (eno, ebps, fnbA, fnbB, fib, clfA, clfB, bbp, cna) and two biofilm regulatory genes (icaA, icaD) was looked for by polymerase chain reaction (PCR). The results evidenced that icaA, icaD, eno, ebps, clfA, and clfB genes were amplified from all strains, while fnbA, fnbB, fib, and bbp genes were non-uniformly distributed among them. Notably, the results showed for the first time that the presence of the cna gene is associated with biofilm non-producing MSSA strains (p<0.05).

A formação de biofilmes é um fator de virulência importante que contribui para a cronicidade dos processos infecciosos produzidos por Staphylococcus aureus. As proteínas presentes em superfície podem promover a formação de biofilme. Neste estudo, comparou-se a distribuição de genes que codificam para proteínas de adesão associadas com a formação de biofilmes em cepas resistentes (MRSA) e sensíveis à meticilina (MSSA). A análise de um total de 106 isolados obtidos a partir de amostras sólidas e líquidas coletadas em um hospital no México mostrou que a formação de biofilme é associada significativamente a cepas MRSA (83%). A técnica de reação em cadeia da polimerase (PCR) foi utilizada para verificar a presença de nove genes de adesinas (eno, ebps, fnbA, fnbB, fib, clfA, clfB, bbp, cna) e dois genes reguladores do biofilme (icaA, icaD). Os resultados mostraram que os genes icaA, icaD, eno, ebps, clfA, clfB foram amplificados em todas as cepas, enquanto que os genes fnbA, fnbB, fib, e bbp tiveram uma distribuição variável. Os dados obtidos mostram pela primeira vez que a presença do gene cna está associada a cepas MSSA e não produtoras de biofilme (p<0,05).

Estudio del juego adulto-niño en edad preescolar. Diferentes sistemas de observación / Study on play at pre-schooler age. Different observational systems

Se presenta un aspecto del programa de investigación que este grupo viene realizando desde el año 2000 en el marco de las diferentes programaciones UBACyT. En esta etapa nos proponemos realizar articulaciones entre nuestro quehacer como psicoanalistas clínicos especializados en primera infancia y la labor de investigación basada en observaciones minuciosas de interacciones video-filmadas. Ejemplificamos, a partir de las viñetas de situaciones lúdicas video-filmadas en el marco de la investigación, la superposición de análisis posibles de las mismas desde tres sistemas, desarrollados por el equipo, descriptos también en este artículo. Un primer sistema estudia la modalidad afectiva de interacción, los indicadores de desregulación y el nivel de simbolización. Un segundo sistema se centra en los temas más frecuentes que se despliegan en la situación de juego libre. El tercero se basa en conceptualizaciones psicoanalíticas, con énfasis en la teoría de desarrollo de la libido. Tenemos en cuenta una visión que contempla la complejidad y la heterogeneidad de nuestro objeto de estudio y el aporte que la investigación observacional de interacciones lúdicas progenitor-niño puede realizar al estudio del desarrollo y a la clínica en primera infancia.

This paper presents one aspect of the research program that this group has been conducting since 2000 under UBACyT research programme. At this stage, we intend to make links between our clinical work as psychoanalysts specialized in early childhood and our research work, based on detailed observations of video-filmed interactions obtained in the research program. We offer some vignettes in order to exemplify the different possible analysis of the play situation, based on three observational systems, developed by the team, that are also described in this article. One system studies the affective mode of interaction, signs of affective deregulation and the level of symbolization in the play situation. A second system focuses on the description of play themes. The third system is based on psychoanalytical conceptualizations, with emphasis on the the theory of the development of the libido. Our view includes the complexity and heterogeneity of the play situation as object of study for developmental psychology and the contribution that observational research of parent-child play interactions can offer to the research and clinical interventions in early childhood.

Regulación afectiva, vulnerabilidad psíquica y simbolización en niños y adolescentes en situaciones de riesgo social / Affective regulation, psychic vulnerability and symbolization in children and adolescents in situations of social risk

Presentaremos reflexiones y puentes conceptuales que surgieron del trabajo de articulación entre los resultados y las experiencias de dos programas de la Facultad de Psicología (UBA) iniciados en 2001: un programa de investigación UBACyT sobre regulación y desregulación afectiva en la primera infancia basado en el microanálisis de observaciones de interacciones lúdicas madre-niño videofilmadas, y un programa de extensión universitaria que se lleva a cabo por docentes y estudiantes en hogares de tránsito de la ciudad de Buenos Aires con niños y adolescentes en situaciones de riesgo social que viven separados de sus familias de origen por intervención judicial. Consideramos que los aportes de nuestras investigaciones sobre regulación afectiva, autorregulación y desregulación en la infancia pueden aplicarse a la comprensión de los posibles efectos disruptivos que la discontinuidad en el sostén parental puede producir en la estructuración psíquica y en las dificultades en el proceso de simbolización. Los resultados de la investigación muestran la influencia de los adultos como agentes de transformación de los afectos disruptivos en el niño. Creemos que estos conocimientos pueden aportar a la creación de recursos de intervención temprana en niños en situaciones de vulnerabilidad social.

In this paper we present reflections and conceptual bridges produced by putting together results and experiences of two programs being conducted by the Faculty of Psychology, Buenos Aires University, initiated in 2001: an UBACyT research program that deals with affect regulation- dysregulation in infancy, based in the analysis of videotaped and microanalysed observations of mother - child play interactions; and an extension community program that is conducted in foster care institutions at Buenos Aires city by teachers and students, where children and adolescents in social risk situations are institutionalized by judicial intervention, separated from their families. We believe that the contribution of our research in affect regulation, self-regulation and dysregulation in infancy can be applied to the understanding of possible disruptive effects that discontinuity in the parental support can produce in psychic structure and in difficulties in the process of symbolization. The results of the research show the influence of adults like agents of transformation of disruptive affects in the child. We believe that this knowledge can contribute to the creation of early intervention resources for children in social risk.

Lupus eritematoso cutáneo: revisión de nuestra casuística en los últimos 15 años / Lupus erythematosus cutaneous: review of our casuistic in the last 15 years

Introducción. El lupus eritematoso (LE) es una enfermedad inflamatoria multisistémica de etiología desconocida que comprende una variedad de formas clínicas. Material y método. Se efectuó un estudio retrospectivo y descriptivo de los pacientes que consultaron en el Servicio de Dermatología del Policlínico Bancario durante el período comprendido entre enero de 1994 y enero de 2009. Se incluyeron aquellos pacientes mayores de 18 años con diagnóstico histopatológico de lupus eritematoso. Objetivos. Identificar las distintas variantes clínicas de lupus eritematoso, establecer su distribución por sexo y edad, y comparar los resultados con las estadísticas nacionales e internacionales. Resultados. Se evaluaron 46 pacientes (33 mujeres [71,73%]).Edad promedio al diagnóstico: 42 años; rango: 19-70 años. Presentaron lesiones específicas de LE 42 pacientes (91,30%), 28 correspondieron a la variante de lupus eritematoso cutáneo crónico (67%), 6 a lupus eritematoso cutáneo subagudo (14%) y 8 a lupus eritematoso cutáneo agudo (19%). Las lesiones inespecíficas se presentaron en 21 pacientes (45%) y las halladas con mayor frecuencia fueron: fotosensibilidad (38,09%) alopecia difusa (33,33%) y alteraciones vasculares (28,57%). Conclusión. Nuestros hallazgos son similares a los señalados en la bibliografía consultada, a excepción de la edad de presentación, que fue superior.

Reacción adversa cutánea al Imatinib durante el tratamiento de la leucemia mieloide crónica / Cutaneous adverse reaction to imatinib in the treatment of chronic myeloid leukemia

El imatinib es el tratamiento de elección para pacientes con leucemia mieloide crónica (LMC). Su objetivo es una proteína de fusión BCR-ABL con actividad kinasa y se la considera una droga con buena tolerancia; sin embargo, pueden presentarse efectos adversos que incluyen múltiples manifestaciones a nivel cutáneo, hematológico, gastrointestinal y cardiológico. La toxicidad en piel es un efecto adverso frecuente del tratamiento con imatinib, que se presenta con una frecuencia de hasta el 66% y es dependiente de la dosis administrada. Presentamos una paciente añosa con LMC que recibió tratamiento con imatinib 800 mg/día y desarrolló una erupción maculopapulosa, pruriginosa, asociada a episodio de insuficiencia cardíaca congestiva.