Comparative toxicological analysis of two pristine carbon nanomaterials (graphene oxide and aminated graphene oxide) and their corresponding degraded forms using human in vitro models.

Despite the wide application of graphene-based materials, the information of the toxicity associated to some specific derivatives such as aminated graphene oxide is scarce. Likewise, most of these studies analyse the pristine materials, while the available data regarding the harmful effects of degraded forms is very limited. In this work, the toxicity of graphene oxide (GO), aminated graphene oxide (GO-NH2), and their respective degraded forms (dGO and dGO-NH2) obtained after being submitted to high-intensity sonication was evaluated applying in vitro assays in different models of human exposure. Viability and ROS assays were performed on A549 and HT29 cells, while their skin irritation potential was tested on a reconstructed human epidermis model. The obtained results showed that GO-NH2 and dGO-NH2 substantially decrease cell viability in the lung and gastrointestinal models, being this reduction slightly higher in the cells exposed to the degraded forms. In contrast, this parameter was not affected by GO and dGO which, conversely, showed the ability to induce higher levels of ROS than the pristine and degraded aminated forms. Furthermore, none of the materials is skin irritant. Altogether, these results provide new insights about the potential harmful effects of the selected graphene-based nanomaterials in comparison with their degraded counterparts.

High-Performance Aramids with Intrinsic Bactericide Activity.

Aramids, renowned for their high-performance attributes, find applications in critical fields such as protective equipment, aerospace components, and industrial filters. However, challenges arise in scenarios in which frequent washing is impractical, leading to bacterial proliferation, especially in textiles. This study outlines a straightforward and scalable method for preparing aramid-coated textiles and films endowed with inherent bactericidal activity, achieved by reacting parent aramids with vanillin. The functionalization of the aramids with bactericide moieties not only preserved the high-performance characteristics of commercial aramids but also improved their crucial mechanical properties. Tensile tests revealed an increase in Young's modulus, up to 50% compared to commercial m-aramid, accompanied by thermal performance comparable to commercial m-aramids. The evaluation of these coated textiles as bactericidal materials demonstrated robust effectiveness with A parameters (antibacterial activity) of 4.31 for S. aureus and 3.44 for K. pneumoniae. Reusability tests (washing the textiles in harsh conditions) underscored that the bactericide-coated textiles maintain their performance over at least 5 cycles. Regarding practical applications, tests performed with reconstructed human epidermis affirmed the nonirritating nature of these materials to the skin. The distinctive qualities of these metal-free intrinsic bactericidal aramids position them as ideal candidates for scenarios demanding a synergy of high performance and bactericidal properties. Applications such as first responders' textiles or filters stand to benefit significantly from these advanced materials.

Conjunctival ultraviolet autofluorescence as a biomarker of outdoor exposure in myopia: a systematic review and meta-analysis.

Outdoor exposure is considered the primary modifiable risk factor in preventing the development of myopia. This effect is thought to be attributed to the light-induced synthesis and release of dopamine in the retina. However, until recent years, there was no objective quantifiable method available to measure the association between time spent outdoors and myopia. It is only recently that the conjunctival ultraviolet autofluorescence (CUVAF) area, serving as a biomarker for sun exposure, has begun to be utilized in numerous studies. To provide a comprehensive summary of the relevant evidence pertaining to the association between the CUVAF area and myopia across different geographic regions and age groups, a systematic review and meta-analysis were conducted. The search encompassed multiple databases, including MEDLINE, SCIENCE DIRECT, GOOGLE SCHOLAR, WEB OF SCIENCE, and SCOPUS, and utilized specific search terms such as "conjunctival ultraviolet autofluorescence", "CUVAF", "UVAF", "objective marker of ocular sun exposure", "myopia", "degenerative myopia", and "high myopia". The bibliographic research included papers published between the years 2006 and 2022. A total of 4051 records were initially identified, and after duplicates were removed, 49 articles underwent full-text review. Nine articles were included in the systematic review. These studies covered myopia and outdoor exposure across different regions (Australia, Europe and India) with a total population of 3615 individuals. They found that myopes generally had smaller CUVAF areas compared to non-myopes. The meta-analysis confirmed this, revealing statistically smaller CUVAF areas in myopic patients, with a mean difference of - 3.30 mm2 (95% CI - 5.53; - 1.06). Additionally, some studies showed a positive correlation between more outdoor exposure and larger CUVAF areas. In terms of outdoor exposure time, myopic patients reported less time outdoors than non-myopic individuals, with a mean difference of - 3.38 h/week (95% CI - 4.66; - 2.09). Overall, these findings highlight the connection between outdoor exposure, CUVAF area and myopia, with regional variations playing a significant role. The results of this meta-analysis validate CUVAF as a quantitative method to objectively measure outdoor exposure in relation with myopia development.

Calidad de vida profesional de quienes laboran en cuidados paliativos y su relación con el autocuidado, la atención plena y el sentido de vida / Professional quality of life of palliative care staff and its relationship with selfcare, mindfulness and meaning of life

Introducción: La calidad de vida profesional (que incluye satisfacción y fatiga por compasión) y sus factores asociados, han sido poco explorados en cuidados paliativos (CP) en Latinoamérica. Objetivo: Determinar la calidad de vida profesional en CP y su relación con el autocuidado, la capacidad de atención plena y el sentido de vida. Método: Estudio observacional, de corte transversal. Participaron profesionales laborando en CP en Colombia. Se empleó el PROQOL para evaluar satisfacción por compasión (SC), Burnout y trauma secundario (TS), el PSCS para examinar autocuidado, el MAAS para examinar atención plena y la Escala dimensional de sentido de vida (EDSV). Se realizaron análisis descriptivos, correlacionales y de regresión múltiple. Resultados: participaron 108 profesionales. Edad promedio 38 años, 55% médicos, 73% mujeres, 32,4% reportaron elevada afectación del bienestar por la Covid-19. El 85% obtuvieron puntuaciones medias o altas en SC, el 75,9% en Burnout y el 81,5% en TS (con medianas de 42.5, 21 y 12, respectivamente). Hubo una correlación positiva y significativa entre PSCS, MAAS y EDSV con SC, pero negativa y significativa con Burnout y TS. En conjunto, la SC, el MAAS y el autocuidado social tuvieron un efecto predictivo negativo sobre los niveles de Burnout (R2=0,535). Conclusiones: Aunque la mayoría de participantes están satisfechos con su labor, los índices de Burnout y TS fueron elevados durante el período de pandemia. El en conjunto, la satisfacción por compasión, la atención plena y el autocuidado social predijeron niveles menores de Burnout, indicando potenciales vías de apoyo para quienes ejercen CP (AU)

Introduction. Professional quality of life (involving compassion satisfaction and compassion fatigue) and its related factors have been poorly explored in Palliative Care (PC). Objectives. To determine the professional quality of life of PC practitioners in Colombia and its relationship with self-care, mindfulness and meaning of life. Methods. Observational cross-sectional study. Practicing professionals of PC of Colombia were invited. Compassion Satisfaction (CS), Burnout, and Secondary Trauma (ST) were assessed using PROQOL; selfcare was examined using PSCS; MAAS was used to assess Mindfulness capacity, and the Dimensional Scale of sense of life (EDSV) was also employed. Descriptive correlational, and multiple regression analyses were performed. Results. One-hundred and eight participants participated; mean age of 38 years, 73% women, 32,4% indicated high impact on their wellbeing due to Covid-19; 85% of participants showed medium-high scores on CS, 75,9% on Burnout, and 81,5% on ST (median scores of 42.5, 21, and 12, respectively). Scores on PSCS, MAAS and EDSV positively and significantly correlated with CS, and were negatively and significantly related with Burnout and ST. Altogether, SC, MAAS and social selfcare had a negative predictive effect on Burnout levels (R2=0.538). Conclusion. Although most participants were satisfied with their jobs, scores on Burnout, and TS were high during the Pandemic. Together, compassion satisfaction, mindfulness and social selfcare were predictive of lower levels of Burnout, signaling potential lines of intervention for PC practitioners (AU)

On the Tunability of Toxicity for Viologen-Derivatives as Anolyte for Neutral Aqueous Organic Redox Flow Batteries.

Viologen-derivatives are the most widely used redox organic molecules for neutral pH negative electrolyte of redox flow batteries. However, the long-established toxicity of the herbicide methyl-viologen raises concern for deployment of viologen-derivatives at large scale in flow batteries. Herein, we demonstrate the radically different cytotoxicity and toxicology of a series of viologen-derivatives in in vitro assays using model organisms representative of human and environmental exposure, namely human lung carcinoma epithelial cell line (A549) and the yeast Saccharomyces cerevisiae. The results show that safe viologen derivatives can be molecularly engineered, representing a promising family of negolyte materials for neutral redox flow batteries.

Low HDL-c levels at admission are associated with greater severity and worse clinical outcomes in patients with COVID-19 disease.

Background and aims: HDL particles may act to buffer host cells from excessive inflammatory mediators. The aim of this study is to investigate if the lipid profile provides a prognostic biomarker for COVID-19 outcomes. Methods: This was a prospective study of the characteristics of 125 adult COVID-19 patients with a lipid profile performed on the day of admission analyzed with regard to clinical outcomes. Results: Seventy-seven patients (61.2%) were men, with a mean age of 66.3 (15.6) years. 54.1% had bilateral pneumonia. The all-cause mortality rate during hospitalization was 20.8%. We found a direct association between more severe disease assessed by the WHO classification, admission to the ICU and death with more pronounced lymphopenia, higher levels of CRP, ferritin (p < 0.001), D-dímer and lactate dehydrogenase (LDH) all statistically significant. Lower leves of HDL-c and LDL-c were also associated with a worse WHO classification, ICU admission, and death,. HDL-c levels were inversely correlated with inflammatory markers CRP (r = -0.333; p < 0.001), ferritin (r = -0.354; p < 0.001), D-dímer (r = -0.214; p < 0.001), LDH (r = -0.209; p < 0.001. LDL-c levels were significantly associated with CRP (r = -0.320; p < 0.001) and LDH (r = -0.269; p < 0.001). ROC curves showed that HDL [AUC = 0.737(0.586-0.887), p = 0.005] and lymphocytes [AUC = 0.672(0.497-0.847], p < 0.043] had the best prognostic accuracy to predict death. In a multivariate analysis, HDL-c (ß = -0.146(0.770-0.971), p = 0.014) and urea (ß = 0.029(1.003-1.057), p = 0.027) predicted mortality. Conclusion: Hypolipidemia including HDL levels at admission identifies patients with a higher risk of death and worse clinical manifestations who may require more intensive care.

Rural Palliative Care Telemedicine for Advanced Cancer Patients: A Systematic Review.

Context: Telemedicine offers the opportunity to provide remote palliative care for patients to control symptoms and improve quality of life, even for patients with advanced diseases. Objectives: Establish a telemedicine model of rural palliative care for advanced cancer patients with difficulties in accessing standard care. Methods: This review comports with the minimum standards described in the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) and uses the palliative care literature review iterative method (PALETTE) proposed by Zwakman et al in 2018. Results: Three hundred, ninety-two articles were identified in PubMed and EMBASE databases and alternative search engines such as Google Scholar and OpenGrey. A telemedicine delivery model was developed for patients with limited access to standard care, which consists of identifying the candidate population, establishing the most convenient telemedicine modality, agreeing with patients and caregivers on palliative care needs, and evaluating the interventions effectiveness. Conclusion: Telemedicine is a revolutionary tool to provide palliative care to advanced cancer patients whose clinical condition or location prevent them from accessing conventional care.

Comparative toxicological assessment of three soils polluted with different levels of hydrocarbons and heavy metals using in vitro and in vivo approaches.

The biological effects induced by the pollutants present in soils, together with the chemical and physical characterizations, are good indicators to provide a general overview of their quality. However, the existence of studies where the toxicity associated to soils contaminated with mixtures of pollutants applying both in vitro and in vivo models are scarce. In this work, three soils (namely, Soil 001, Soil 002 and Soil 013) polluted with different concentrations of hydrocarbons and heavy metals were evaluated using different organisms representative of human (HepG2 human cell line) and environmental exposure (the yeast Saccharomyces cerevisiae, the Gram-negative bacterium Pseudomonas putida and, for the in vivo evaluation, the annelid Enchytraeus crypticus). In vitro assays showed that the soluble fraction of the Soil 001, which presented the highest levels of heavy metals, represented a great impact in the viability of the HepG2 cells and S. cerevisiae, while organic extracts from Soils 002 and 013 caused a slight decrease in the viability of HepG2 cells. In addition, in vivo experiments showed that Soils 001 and 013 affected the survival and the reproduction of E. crypticus. Altogether, these results provide a general overview of the potential hazards associated to three specific contaminated sites in a variety of organisms, showing how different concentrations of similar pollutants affect them, and highlights the relevance of testing both organic and soluble extracts when in vitro safety assays of soils are performed.

Adjunctive Recombinant Human Plasma Gelsolin for Severe Coronavirus Disease 2019 Pneumonia.

Background: Excessive inflammation contributes to the morbidity and mortality of severe coronavirus disease 2019 (COVID-19) pneumonia. Recombinant human plasma gelsolin (rhu-pGSN) improves disease outcomes in diverse experimental models of infectious and noninfectious inflammation. Methods: In a blinded, randomized study, 61 subjects with documented COVID-19 pneumonia having a World Health Organization (WHO) Severity Score of 4 to 6 and evidence of a hyperinflammatory state were treated with standard care and either adjunctive rhu-pGSN 12 mg/kg or an equal volume of saline placebo given intravenously at entry, 12 hours, and 36 hours. The prespecified coprimary outcomes were survival without major respiratory, hemodynamic, or renal support on Day 14 and the incidence of serious adverse events (SAEs) during the 90-day study period. Results: All subjects receiving ≥1 dose of study drug were analyzed. Fifty-four of 61 subjects (88.5%) were WHO severity level 4 at entry. The proportions of subjects alive without support on Day 14 were 25 of 30 rhu-pGSN recipients (83.3%) and 27 of 31 placebo recipients (87.1%). Over the duration of the study, WHO Severity Scores improved similarly in both treatment groups. No statistically significant differences were observed between treatment groups at any time point examined. Two subjects died in each group. Numerically fewer subjects in the rhu-pGSN group had SAEs (5 subjects; 16.7%) or ≥ Grade 3 adverse events (5 subjects; 16.7%) than in the placebo group (8 subjects [25.8%] and 9 subjects [29.0%], respectively), mostly involving the lungs. Three rhu-pGSN recipients (10.0%) were intubated compared to 6 placebo recipients (19.4%). Conclusions: Overall, subjects in this study did well irrespective of treatment arm. When added to dexamethasone and remdesivir, no definitive benefit was demonstrated for rhu-pGSN relative to placebo. Safety signals were not identified after the administration of 3 doses of 12 mg/kg rhu-pGSN over 36 hours. The frequencies of SAEs and intubation were numerically fewer in the rhu-pGSN group compared with placebo.

Atención Primaria y redes comunitarias en tiempos COVID-19: una aproximación a lo que está pasando y qué podemos hacer / Primary care and community partnerships during the COVID19 pandemic: an approach to what has been done so far and ways to improve it

Objetivo. Identificar las redes y acciones comunitarias realizadas en la Comunidad Valenciana durante la situación de la pandemia por COVID-19 y describir las fortalezas y amenazas para el desarrollo de la salud comunitaria. Diseño. Estudio cuantitativo descriptivo y cualitativo, incluyendo un cuestionario remitido por correo y análisis DAFO. Emplazamiento. Equipos de Atención Primaria (EAP) de la Comunidad Valenciana. Participantes y contexto. El ámbito de estudio son los miembros de la Societat Valenciana de Medicina Familiar i Comunitària (SoVaMFiC). Método. 1) Constitución de un grupo de trabajo; 2) diseño de un cuestionario ad hoc para la identificación de redes comunitarias, acciones o iniciativas durante la pandemia por COVID-19, y de aspectos positivos y negativos del impacto de la pandemia sobre la salud comunitaria; 3) envío del cuestionario a través de correo electrónico; 4) análisis DAFO, y 5) elaboración de recomendaciones. Resultados. Se obtuvieron un total de 56 respuestas (3,3% de participación) identificándose 32 acciones o redes comunitarias de las cuales, 19 existían previamente a la crisis de la COVID-19. Se realizó un análisis DAFO y se identificaron 6 debilidades, 9 amenazas, 5 fortalezas y 8 oportunidades. Este análisis permitió la elaboración de un decálogo de recomendaciones para promover la atención comunitaria en tiempos de la COVID-19. Conclusiones. Las acciones y redes comunitarias surgidas durante la pandemia tienen como objetivo principal responder a las necesidades que han ido apareciendo. Los EAP han participado poco en estas iniciativas. (AU)

Objective: To identify community partnerships, actions or initiatives carried out in the Valencian Community during the Covid19 pandemic and to describe the strengths and challenges to supporting community health during this situation. Design: Mixed method study using survey with closed and open-ended questions and SWOT analysis. Setting: Primary Health are teams of the Valencian Community. Participants and context: Members of the Valencian Society of Family and Community Medicine (SoVaMFiC). Method: (1) Development of a working group. (2) Design of an ad hoc questionnaire to identify community partnerships, actions or initiatives during the Covid19 pandemic, and positive and negative aspects of the impact of the pandemic on community health. (3) Launch of the questionnaire via email; (4) SWOT analysis and (5) development of recommendations. Results: A total of 56 responses were obtained (3.3% response rate), identifying 32 actions or community networks, of which 19 existed prior to the Covid19 crisis. A SWOT analysis was carried out, and six weaknesses, nine threats, five strengths and eight opportunities were identified. This analysis informed the development of a set of 10 recommendations for community care in the time of Covid19. Conclusions: The community partnerships, actions or initiatives developed during the pandemic have the main objective of responding to the needs that have been emerging. The Primary Health Care teams have shown limited engagement in these initiatives. (AU)

Identification and characterization of class 1 integrons among multidrug-resistant uropathogenic Escherichia coli strains in Mexico.

This study aimed to identify and characterize integrons among multidrug-resistant (MDR) uropathogenic Escherichia coli (UPEC) from outpatients in Mexico City, Mexico. PCR assays were used to screen for the presence of class 1, 2 and 3 integrons, whose PCR products were sequenced to identify the inserted gene cassettes within the variable regions. Out of 83 tested strains, 53 (63.9%) were positive for the presence of class 1 integrons, whereas no integrons were detected in the remaining strains, regardless of their classes. Most of the strains carrying the intI1 gene belonged to the extraintestinal B2 (41.5%) and commensal A (32.1%) phylogroups, and to a lesser extent, the extraintestinal D (20.8%) and commensal B1 (5.7%) phylogroups. Moreover, 8 different gene cassette arrangements were detected, with dfrA17 and aadA5 being the most common (32.1% of the class 1 integron-positive strains), which confer resistance to trimethoprim/sulfamethoxazole and aminoglycosides, respectively. Our results suggest that class 1 integrons are widely distributed among MDR-UPEC strains in Mexico, which may directly or indirectly contribute to the selection of MDR strains. These findings are important for a better understanding of the factors and mechanisms that promote multidrug resistance among UPEC strains.

Laboratory Findings in Patients with Probable Dengue Diagnosis from an Endemic Area in Colombia in 2018.

As demonstrated with the novel coronavirus pandemic, rapid and accurate diagnosis is key to determine the clinical characteristic of a disease and to improve vaccine development. Once the infected person is identified, hematological findings may be used to predict disease outcome and offer the correct treatment. Rapid and accurate diagnosis and clinical parameters are pivotal to track infections during clinical trials and set protection status. This is also applicable for re-emerging diseases like dengue fever, which causes outbreaks in Asia and Latin America every 4 to 5 years. Some areas in the US are also endemic for the transmission of dengue virus (DENV), the causal agent of dengue fever. However, significant number of DENV infections in rural areas are diagnosed solely by clinical and hematological findings because of the lack of availability of ELISA or PCR-based tests or the infrastructure to implement them in the near future. Rapid diagnostic tests (RDT) are a less sensitive, yet they represent a timely way of detecting DENV infections. The purpose of this study was to determine whether there is an association between hematological findings and the probability for an NS1-based DENV RDT to detect the DENV NS1 antigen. We also aimed to describe the hematological parameters that are associated with the diagnosis through each test.

Study of the Plasma and Buffy Coat in Patients with SARS-CoV-2 Infection-A Preliminary Report.

The pandemic caused by the SARS-CoV-2 infection affects many aspects of public health knowledge, science, and practice around the world. Several studies have shown that SARS-CoV-2 RNA in plasma seems to be associated with a worse prognosis of COVID-19. In the present study, we investigated plasma and buffy RNA in patients with COVID-19 to determine its prognostic value. A prospective study was carried out in patients hospitalized for COVID-19, in which RNA was analyzed in plasma and the buffy coat. Morphological and immunohistochemical studies were used to detect the presence of SARS-CoV-2 in the buffy coat. In COVID-19 patients, the obtained RNA concentration in plasma was 448.3 ± 31.30 ng/mL. Of all the patients with positive plasma tests for SARS-CoV-2, 46.15% died from COVID-19. In four cases, tests revealed that SARS-CoV-2 was present in the buffy coat. Abnormal morphology of monocytes, lymphocytes and neutrophils was found. An immunohistochemical study showed positivity in mononuclear cells and platelets. Our results suggest that SARS-CoV-2 is present in the plasma. This facilitates viral dissemination and migration to specific organs, where SARS-CoV-2 infects target cells by binding to their receptors. In our study, the presence of plasma SARS-CoV-2 RNA was correlated with worse prognoses.

First and second waves of coronavirus disease-19: A comparative study in hospitalized patients in Reus, Spain.

Many countries have seen a two-wave pattern in reported cases of coronavirus disease-19 during the 2020 pandemic, with a first wave during spring followed by the current second wave in late summer and autumn. Empirical data show that the characteristics of the effects of the virus do vary between the two periods. Differences in age range and severity of the disease have been reported, although the comparative characteristics of the two waves still remain largely unknown. Those characteristics are compared in this study using data from two equal periods of 3 and a half months. The first period, between 15th March and 30th June, corresponding to the entire first wave, and the second, between 1st July and 15th October, corresponding to part of the second wave, still present at the time of writing this article. Two hundred and four patients were hospitalized during the first period, and 264 during the second period. Patients in the second wave were younger and the duration of hospitalization and case fatality rate were lower than those in the first wave. In the second wave, there were more children, and pregnant and post-partum women. The most frequent signs and symptoms in both waves were fever, dyspnea, pneumonia, and cough, and the most relevant comorbidities were cardiovascular diseases, type 2 diabetes mellitus, and chronic neurological diseases. Patients from the second wave more frequently presented renal and gastrointestinal symptoms, were more often treated with non-invasive mechanical ventilation and corticoids, and less often with invasive mechanical ventilation, conventional oxygen therapy and anticoagulants. Several differences in mortality risk factors were also observed. These results might help to understand the characteristics of the second wave and the behaviour and danger of SARS-CoV-2 in the Mediterranean area and in Western Europe. Further studies are needed to confirm our findings.

Recommendations from the Asociación Colombiana de Medicina del Sueño for the practice of sleep medicine in Colombia during the COVID-19 pandemic / Recomendaciones de la Asociación Colombiana de Medicina del Sueño para el ejercicio de la medicina del sueño en Colombia durante la pandemia por COVID-19

Abstract Measures such as frequent handwashing, mandatory use of face masks by the general population in public spaces, social and physical distancing, and mandatory confinement of most people at their homes have contributed to slowing down the spread of the new coronavirus (SARS-CoV-2), which is the source of the current COVID-19 pandemic. However, adopting some of these measures has caused delays in the diagnosis and treatment of various diseases, including sleep disorders. Therefore, it is urgent for sleep specialists and sleep centers to gradually resume activities, as long as strict biosecurity protocols aimed at reducing the risk of contagion are implemented. In this scenario, and in order to help somnologists reopen sleep centers and resume the procedures performed there, the Asociación Colombiana de Medicina del Sueño (Colombian Association of Sleep Medicine) proposes through this reflection paper several recommendations that should be considered during the reactivation process. These recommendations are based on the COVID-19 spread mitigation strategies established by the Colombian health authorities, the guidelines issued by the American Academy of Sleep Medicine, and relevant literature on this subject, which was reviewed after performing a search in the PubMed, SciELO, and Google Scholar databases using the search terms "sleep" "sleep medicine" and "COVID19".

Resumen El lavado de manos frecuente, el uso obligatorio de mascarilla por parte de la población general en sitios públicos, el distanciamiento físico y social, y el confinamiento obligatorio de la mayoría de la población en sus casas son las medidas que hasta el momento han ayudado a frenar la propagación del nuevo coronavirus (SARS-CoV-2), causante de la actual pandemia por COVID-19. Sin embargo, la adopción de algunas de estas medidas ha generado retraso en el diagnóstico y tratamiento de diferentes enfermedades, incluyendo los trastornos del sueño, por lo que es urgente que los especialistas en medicina del sueño y los centros de sueño retomen sus actividades gradualmente, siempre que se implementen estrictos protocolos de bioseguridad que mitiguen el riesgo de contagio. En este contexto, y con el fin de ayudar a los somnólogos a reabrir los centros de sueño y reanudar los procedimientos allí realizados, la Asociación Colombiana de Medicina del Sueño propone en la presente reflexión una serie de recomendaciones para tener en cuenta durante el proceso de reactivación. Estas recomendaciones se basan en las estrategias de mitigación establecidas por las autoridades sanitarias del país, las directrices de la American Academy of Sleep Medicine y la literatura disponible sobre el tema, la cual fue revisada luego de realizar una búsqueda en las bases de datos PubMed, SciELO y Google Scholar usando los términos "sleep" "sleep medicine" y "COVID19".

Low-density lipoprotein from active SLE patients is more atherogenic to endothelial cells than low-density lipoprotein from the same patients during remission.

OBJECTIVES: SLE patients have an enhanced risk of atherosclerosis and cardiovascular disease. However, the increased prevalence of cardiovascular disease is not fully explained by traditional Framingham cardiovascular risk factors. Specific features of low-density lipoprotein (LDL) particles, other than plasma concentration, may induce accelerated atherosclerosis at early stages in these patients. Thus, we aimed to explore the impact of LDL from both active and inactive SLE patients on human aortic endothelial cells. METHODS: Human aortic endothelial cells were stimulated with the same concentration of LDL particles isolated from pooled serum that was collected from 13 SLE patients during both active and inactive states. Gene expression and cell migration assays were performed. RESULTS: Circulating LDL particles obtained from healthy volunteers and SLE patients in both remission and flare states were comparable in terms of number, cholesterol and triglyceride content, and net electric charge. Stimulation of cells with LDL from active SLE patients induced the expression of vascular cell adhesion molecule 1 (∼2.0-fold, P < 0.05), monocyte chemoattractant protein 1 (∼2.0-fold, P < 0.05) and matrix metallopeptidase 2 (∼1.6-fold, P < 0.01) compared with cells stimulated with LDL from inactive SLE patients. Additionally, LDL extracted from active patients increased cell migration in a wound-healing assay (1.4-fold, P < 0.05). CONCLUSION: Our data show that, at the same LDL concentration, LDL from active SLE patients had increased proatherogenic effects on endothelial cells compared with LDL from the same patients when in an inactive or remission state.

RECOMMENDATIONS OF THE ASOCIACION COLOMBIANA DE MEDICINA DEL SUEÑO (ACMES) FOR THE PRACTICE OF SLEEP MEDICINE IN COLOMBIA DURING CONTINGENCY PANDEMIC COVID-19 / RECOMENDACIONES DE LA ASOCIACION COLOMBIANA DE MEDICINA DE SUEÑO PARA EL EJERCICIO DE LA MEDICINA DEL SUEÑO EN COLOMBIA DURANTE LA CONTINGENCIA PANDEMIA COVID-19.

The Asociación Colombiana de Medicina del Sueño (ACMES) in order to help somnologists evaluate the sleep unit and the procedures carried out on it in response to the outbreak of COVID-19 issues this guide. This is based on the mitigation strategies recommended by the country's health authorities and the bibliographic review of the available medical evidence and current AASM recommendations. Colombia is in the phase of sustained transmission of COVID-19 and frequent hand-washing measures, the use of a mask by the general population in public places, physical distancing and home confinement, supported by local sanitary norms, have helped to stop the spread of the virus. However, the economic crisis associated with this outbreak makes it urgent that the country returns little by little with the implementation of the necessary biosecurity measures to a relative normality. In this current context of the pandemic in Colombia, ACMES has designed this guide so that somnologists and local sleep units have a minimum orientation in their practice during this outbreak and once the public health measures to lower the speed of contagion have been overcome gradually reopen the economy and contain the speed of spread to get back to normal if possible.

La Asociación Colombiana de Medicina del Sueño (ACMES) con el fin de ayudar a los somnólogos a evaluar la unidad de sueño y los procedimientos que se llevan a cabo en la misma en respuesta al brote del COVID-19 emite la presente guía. Esta se fundamenta en las estrategias de mitigación recomendadas por las autoridades sanitarias del país y de la revisión bibliográfica de la evidencia médica disponible y recomendaciones actuales AASM.  Colombia se encuentra en la fase de transmisión sostenida del COVID-19 y las medidas de lavado de manos frecuente, de uso de mascarilla por la población general en sitios públicos, de distanciamiento físico y confinamiento en los hogares, respaldada por normas sanitarias locales han ayudado a frenar la propagación del virus. Sin embargo, la crisis económica asociada a este brote hace urgente que el país retorne poco a poco con la implementación de las medidas de bioseguridad necesaria a una relativa normalidad. En este contexto actual de la pandemia en Colombia la ACMES ha diseñado esta guía para que los somnólogos y las unidades de sueño locales tengan una orientación mínima en su práctica durante este brote y una vez superadas las medidas de salud pública para bajar la velocidad del contagio del virus, reabrir poco a poco la economía y contener la velocidad de la propagación para volver a la normalidad en lo posible.

Gelsolin: a new biomarker of disease activity in SLE patients associated with HDL-c.

OBJECTIVES: To identify potential biomarkers of disease activity analysing the proteome of high-density lipoprotein (HDL) particles from SLE patients in clinical remission and when they develop a flare compared with a healthy control group. METHODS: Quantitative proteomic analyses of purified HDL were performed using Tandem Mass Tag isobaric tag-labelling and nanoLC-Orbitrap (nLC-MS/MS) from nine SLE patients in clinical remission when they developed a flare and from nine healthy controls (9-9-9). We verified the identified proteins by Western blot and ELISA in a cohort of 104 SLE women patients, 46 healthy women and 14 SLE patients when a flare developed. RESULTS: We found 17 proteins with a significant fold-change (>1.1) compared with the control group. In lupus patients experiencing a flare compared with those in remission, we identified four proteins with a significant fold-change (C4, Indian Hedgehog protein, S100A8 and gelsolin). Plasma gelsolin (pGSN) levels were decreased in the 104 SLE patients (176.02(74.9) mcg/l) compared with the control group (217.13(86.7) mcg/l); P=0.005 and when they developed a clinical flare (104.84(41.7) mcg/l); P=0.002). pGSN levels were associated with HDL cholesterol levels (r = 0.316, P<0.001). Antimalarial treated patients showed significant higher levels of pGSN (214.56(88.94) mcg/l regarding 170.35(66.36) mcg/l); P = 0.017. CONCLUSION: Decreased pGSN are associated with clinical disease activity in SLE patients. Antimalarial treatment and HDL cholesterol are associated with higher levels of pGSN.

Global trends in myopia management attitudes and strategies in clinical practice - 2019 Update.

PURPOSE: A survey in 2015 identified a high level of eye care practitioner concern about myopia with a reported moderately high level of activity, but the vast majority still prescribed single vision interventions to young myopes. This research aimed to update these findings 4 years later. METHODS: A self-administrated, internet-based questionnaire was distributed in eight languages, through professional bodies to eye care practitioners globally. The questions examined: awareness of increasing myopia prevalence, perceived efficacy of available strategies and adoption levels of such strategies, and reasons for not adopting specific strategies. RESULTS: Of the 1336 respondents, concern was highest (9.0 ±â€¯1.6; p < 0.001) in Asia and lowest (7.6 ±â€¯2.2; p < 0.001) in Australasia. Practitioners from Asia also considered their clinical practice of myopia control to be the most active (7.7 ±â€¯2.3; p < 0.001), the North American practitioners being the least active (6.3 ±â€¯2.9; p < 0.001). Orthokeratology was perceived to be the most effective method of myopia control, followed by pharmaceutical approaches and approved myopia control soft contact lenses (p < 0.001). Although significant intra-regional differences existed, overall, most practitioners did not consider single-vision distance under-correction to be an effective strategy for attenuating myopia progression (79.6 %), but prescribed single vision spectacles or contact lenses as the primary mode of correction for myopic patients (63.6 ±â€¯21.8 %). The main justifications for their reluctance to prescribe alternatives to single vision refractive corrections were increased cost (20.6 %) and inadequate information (17.6 %). CONCLUSIONS: While practitioner concern about myopia and the reported level of activity have increased over the last 4 years, the vast majority of eye care clinicians still prescribe single vision interventions to young myopes. With recent global consensus evidence-based guidelines having been published, it is hoped that this will inform the practice of myopia management in future.

Recomendaciones en los laboratorios de sueño y para el uso de dispositivos de presión positiva durante la pandemia por COVID-19 / Recommendations in sleep lab and for the use of positive pressure devices during the pandemic of COVID-19

La enfermedad por coronavirus 2019 o COVID-19 se transmite principalmente a través de gotas respiratorias, contacto cercano no protegido y procedimientos generadores de aerosoles (1). Las pruebas realizadas en un laboratorio de sueño y la terapia con presión positiva, como la CPAP o la BPAP, pueden aumentar el riesgo de exposición de transmisión de COVID-19 al personal médico y a los pacientes. Las decisiones basadas en la evidencia son el estándar ideal; sin embargo, esta evidencia va apareciendo poco a poco, a un ritmo más lento que la emergencia de salud pública que estamos viviendo; por tanto, por el momento debemos basar nuestras decisiones en la experiencia, en documentos de consenso, cuando estén disponibles, y en el juicio clínico, cuando no exista evidencia. Nuestro objetivo es proporcionar unas recomendaciones, teniendo como marco de referencia las dictadas por organismos nacionales e internacionales, como la Asociación Colombiana de Medicina del Sueño, la Academia Americana de Medicina del Sueño, la Academia Mexicana de Medicina del Dormir y otras publicaciones en revistas indexadas (2,3).

The coronavirus disease 2019 or COVID-19 is transmitted primarily through respiratory drops, unprotected close contact, and aerosol-generating procedures (1). Tests performed in a sleep laboratory and positive pressure therapy such as CPAP or BPAP, may increase the risk of exposure of transmission of COVID-19 to clinicians and patients. Evidence-based making decisions are the ideal standard, however, this evidence appears little by little, at a slower rate than the public health emergency that we are experiencing; therefore, for the moment, our decisions must be based on our experience, on consensus documents, when they are available, and clinical judgment when there is no evidence. Our objective is to give recommendations, taking as a reference framework those issued by national and international organizations, such as Colombian Asociation of Sleep Medicine, the American Academy of Sleep Medicine, the Mexican Academy of Sleep Medicine, and other publications in indexed journals.