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Central obesity is characterized by visceral adipose tissue (VAT) expansion, considered one of the main risk factors for metabolic complications. In recent years, new drugs have been studied for obesity treatment. Liraglutide (LGT), a GLP-1 agonist, decreases body weight, however, several mechanisms of action on VAT are still unknown. Aim: to study the effect of LGT on factors associated with VAT remodeling and mitochondrial dynamics in mice fed a high-fat diet (HFD). Methods: C57BL/6 mice were divided into Control (C) and HFD. After 15 weeks of feeding, each group was subdivided according to LGT administration for 5 weeks: C, C + LGT, HFD, and HFD + LGT. In epididymal AT (EAT) we evaluated histological and mitochondrial characteristics, vascularity, gelatinase activity (MMPs), and galectin-3 expression. Results: HFD presented larger adipocytes (p < 0.05), and lower vascular density and MMP-9 activity (p < 0.01) than C, while a major number of smaller adipocytes (p < 0.05) and an increase in vascularity (p < 0.001) and MMP-9 activity (p < 0.01) was observed in HFD + LGT. Collagen content was higher (p < 0.05) in EAT from HFD and decreased in HFD + LGT. In C, C + LGT, and HFD + LGT, mitochondria were predominantly tubular-shaped while in HFD mitochondria were mostly spherical (p < 0.001). Conclusion: LGT positively influences VAT behavior by modulating gelatinase activity, enhancing vascularization, and improving adipocyte histological characteristics. Additionally, LGT improves mitochondrial dynamics, a process that would favor VAT functionality.
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INTRODUCTION: Type 2 diabetes is a prevalent condition. The change in glucose control and body weight with the use of once-weekly semaglutide was evaluated in individuals with Type 2 diabetes in Colombia. METHODS: This was a real-world, multi-centre, single-arm study involving adults in Colombia with Type 2 diabetes treated with once-weekly subcutaneous semaglutide for approximately 26 weeks. The primary endpoint assessed the change in glycated hemoglobin (HbA1c) from baseline to end of study. Secondary endpoints included changes in body weight from baseline to end of study. The study also explored the proportion of participants achieving predefined HbA1c targets and weight-loss responses at the end of the study. RESULTS: Data from 225 patients across 11 centers were collected. Most patients were women (65%), and the mean age of the population was 57 years with a median HbA1c of 7.6% and a median body weight of 86 kg. After approximately 26 weeks, semaglutide was associated with a significant reduction in HbA1c of - 0.88 and a body weight reduction of - 4.04kg. The proportion of patients with HbA1c < 7% increased from 32 to 66% at end of study. CONCLUSION: Patients treated with once-weekly semaglutide experienced a clinically significant reduction in HbA1c and body weight. These results are in line with previous clinical trials.
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BACKGROUND: About 80% of cardiovascular diseases (including heart failure [HF]) occur in low-income and developing countries. However, most clinical trials are conducted in developed countries. HYPOTHESIS: The American Registry of Ambulatory or Acutely Decompensated Heart Failure (AMERICCAASS) aims to describe the sociodemographic characteristics of HF, comorbidities, clinical presentation, and pharmacological management of patients with ambulatory or acutely decompensated HF in America. METHODOLOGY: Descriptive, observational, prospective, and multicenter registry, which includes patients >18 years with HF in an outpatient or hospital setting. Collected information is stored in the REDCap electronic platform. Quantitative variables are defined according to the normality of the variable using the Shapiro-Wilk test. RESULTS: This analysis includes data from the first 1000 patients recruited. 63.5% were men, the median age of 66 years (interquartile range 56.7-75.4), and 77.6% of the patients were older than 55 years old. The percentage of use of the four pharmacological pillars at the time of recruitment was 70.7% for beta-blockers (BB), 77.4% for angiotensin-converting enzyme inhibitor (ACEI)/angiotensin II receptor blocker (ARB II)/angiotensin receptor-neprilysin inhibitor (ARNI), 56.8% for mineralocorticoid receptor antagonists (MRA), and 30.7% for sodium-glucose cotransporter type-2 inhibitors (SGLT2i). The main cause of decompensation in hospitalized patients was HF progression (64.4%), and the predominant hemodynamic profile was wet-warm (68.3%). CONCLUSIONS: AMERICCAASS is the first continental registry to include hospitalized or outpatient patients with HF. Regarding optimal medical therapy, approximately a quarter of the patients still need to receive BB and ACEI/ARB/ARNI, less than half do not receive MRA, and more than two-thirds do not receive SGLT2i.
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Inibidores da Enzima Conversora de Angiotensina , Insuficiência Cardíaca , Masculino , Humanos , Estados Unidos/epidemiologia , Idoso , Pessoa de Meia-Idade , Feminino , Inibidores da Enzima Conversora de Angiotensina/uso terapêutico , Antagonistas de Receptores de Angiotensina/uso terapêutico , Estudos Prospectivos , Volume Sistólico , Insuficiência Cardíaca/diagnóstico , Insuficiência Cardíaca/tratamento farmacológico , Insuficiência Cardíaca/epidemiologia , Sistema de Registros , Antagonistas Adrenérgicos beta/uso terapêutico , Antagonistas de Receptores de Mineralocorticoides/uso terapêuticoRESUMO
The skull of vipers is a highly kinetic anatomical structure involved in envenomating and consuming of prey. Morphological knowledge about the viperid skull is based on studies on some groups of species, but information on its variation within the whole family and its functional morphology is still scarce. In this study, we aimed to explore variation in skull morphology among species of the three subfamilies of Viperidae, and test whether that variation correlates with macrohabitat and diet. We performed quantitative analyses of the viperid skull based on broad taxonomic sampling and two methodological approaches: linear and geometric morphometrics. The results of both approaches showed that much of the variation lies in differences of shape and relative size of the premaxilla, the nasals, the frontals, and the parietals. The results indicated that phylogeny and size influence the shape of the skull, but we also found evidence of morphological differentiation between arboreal and terrestrial species and in species with mammal specialist diet. Our findings imply that, besides evolutionary allometry and phylogenetic signal, demands of particular diets coupled with use of certain habitats have in part shaped morphological evolution of the viperid skull.
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Viperidae , Animais , Filogenia , Viperidae/anatomia & histologia , Crânio/anatomia & histologia , Cabeça , Ecossistema , Evolução Biológica , MamíferosRESUMO
Galectin-3 (Gal-3) is a carbohydrate-binding protein with multiple functions. Gal-3 regulates cell growth, proliferation, and apoptosis by orchestrating cell-cell and cell-matrix interactions. It is implicated in the development and progression of cardiovascular disease, and its expression is increased in patients with heart failure. In atherosclerosis, Gal-3 promotes monocyte recruitment to the arterial wall boosting inflammation and atheroma. In acute myocardial infarction (AMI), the expression of Gal-3 increases in infarcted and remote zones from the beginning of AMI, and plays a critical role in macrophage infiltration, differentiation to M1 phenotype, inflammation and interstitial fibrosis through collagen synthesis. Genetic deficiency of Gal-3 delays wound healing, impairs cardiac remodeling and function after AMI. On the contrary, Gal-3 deficiency shows opposite results with improved remodeling and function in other cardiomyopathies and in hypertension. Pharmacologic inhibition with non-selective inhibitors is also protective in cardiac disease. Finally, we recently showed that Gal-3 participates in normal aging. However, genetic absence of Gal-3 in aged mice exacerbates pathological hypertrophy and increases fibrosis, as opposed to reduced fibrosis shown in cardiac disease. Despite some gaps in understanding its precise mechanisms of action, Gal-3 represents a potential therapeutic target for the treatment of cardiovascular diseases and the management of cardiac aging. In this review, we summarize the current knowledge regarding the role of Gal-3 in the pathophysiology of heart failure, atherosclerosis, hypertension, myocarditis, and ischemic heart disease. Furthermore, we describe the physiological role of Gal-3 in cardiac aging.
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The skull of vipers is a highly kinetic anatomical structure involved in envenomating and consuming of prey. Morphological knowledge about the viperid skull is based on studies on some groups of species, but information on its variation within the whole family and its functional morphology is still scarce. In this study, we aimed to explore variation in skull morphology among species of the three subfamilies of Viperidae, and test whether that variation correlates with macrohabitat and diet. We performed quantitative analyses of the viperid skull based on broad taxonomic sampling and two methodological approaches: linear and geometric morphometrics. The results of both approaches showed that much of the variation lies in differences of shape and relative size of the premaxilla, the nasals, the frontals, and the parietals. The results indicated that phylogeny and size influence the shape of the skull, but we also found evidence of morphological differentiation between arboreal and terrestrial species and in species with mammal specialist diet. Our findings imply that, besides evolutionary allometry and phylogenetic signal, demands of particular diets coupled with use of certain habitats have in part shaped morphological evolution of the viperid skull.
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Resumen (analítico) El artículo analiza las modalidades de resistencia y re-existencia producidas en el contexto del levantamiento popular de 2021, en sus relaciones con el juvenicidio. Metodológicamente, se optó por el análisis de narrativas de experiencias de jóvenes de tres ciudades, así como el análisis de un corpus de imágenes relacionado con estos acontecimientos. En resultados, la categoría salir del cerco evidenció que el levantamiento está imbricado con el juvenicidio, desde la precarización y la violencia estatal en pandemia y la existencia de opresiones cruzadas. En la categoría subvertir, se observó la presencia de estrategias de confrontación y deslegitimación simbólica al sistema dominante. En la categoría estéticas populares sobresalen la autorrepresentación y la curación simbólica. La categoría educación popular evidenció la implementación de prácticas fomentadoras del interaprendizaje y la cocreación para buenos vivires.
Abstract (analytical) This article analyzes the modalities of resistance and re-existence that occurred in the context of the Colombian popular uprising in 2021 and relates them with the practice of youthcide. At a methodological level, the article analyses narratives of experiences of young people from three cities, as well as a corpus of images related to the popular uprising. The results identify a category of getting off the fence, which shows that the uprising is related to acts of youthcide. The protests were a response to precariousness and state violence during pandemic, as well as the existence of multiple forms of oppression of the youth population. In the subversion category, confrontation strategies and symbolic delegitimization of the dominant system were observed. In the popular aesthetic category, self-representation and symbolic healing were evident. In the popular education category, the implementation of practices that promote mutual learning and co-creation for good living were identified.
Resumo (analítico) O artigo analisa as modalidades de resistência e reexistência ocorridas durante a revolta popular de 2021, em suas relações com a juvenilicídio. Metodologicamente, utilizou-se a análise de narrativas de experiências de jovens de três cidades, bem como a análise de imagens relacionadas a esses eventos. Nos resultados, a categoria de sair da cerca mostrou que a revolta está entrelaçada com a juvenilicídio, a partir do aprofundamento da precariedade e da violência estatal e para-estatal. Na categoria subverter, observou-se a implementação de estratégias de enfrentamento e deslegitimação simbólica do sistema dominante. Na categoria estética popular, destacam-se a autorrepresentação e a cura simbólica. E na categoria educação popular foram desveladas práticas que promovem o aprendizado mútuo para o bem viver.
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BACKGROUND/AIMS: Aging is accompanied by progressive and adverse cardiac remodeling characterized by myocardial hypertrophy, fibrosis, and dysfunction. We previously reported that galectin-3 (Gal-3) is a critical regulator of inflammation and fibrosis associated with hypertensive heart disease and myocardial infarction. Nevertheless, the role and mechanism of Gal-3 in age-related cardiac remodeling have not been previously investigated. We hypothesized that Gal-3 plays a critical role in cardiac aging and that its deficiency exacerbates the underlying mechanisms of myocardial hypertrophy and fibrosis. METHODS: Male C57BL/6 (control) (n=24) and Gal-3 knockout (KO) (n=29) mice were studied at 24 months of age to evaluate the role of Gal-3 in cardiac aging. We assessed 1) survival rate; 2) systolic blood pressure (SBP) by plethysmography; 3) myocardial hypertrophy, apoptosis, and fibrosis by quantification of histological and immunohistochemical analysis; 4) cardiac expression of angiotensin (Ang) II, Ang (1-7) by Radioimmunoassay; 5) transforming growth factor-ß (TGF-ß), sirtuin (SIRT) 1, SIRT 7 and metalloproteinase 9 (MMP-9) by RT-qPCR and 6) ventricular remodeling and function by echocardiography. RESULTS: We found that aged Gal-3 KO mice had a lower survival rate and exhibited exacerbated myocardial hypertrophy and fibrosis without changes in SBP. Similarly, myocardial apoptosis and MMP-9 mRNA expression was significantly increased in the hearts of Gal-3 KO mice compared to controls. Additionally, cardiac Ang II and TGF-ß expression were higher in aged Gal-3 KO mice while SIRT1 and SIRT7 expression were reduced. CONCLUSION: Our findings strongly suggest that Gal-3 is involved in age-related cardiac remodeling by regulating critical mechanisms associated with the development of pathological hypertrophy. The gene deletion of Gal-3 reduced the lifespan and markedly increased age-dependent mechanisms of myocardial hypertrophy, apoptosis, and fibrosis, including Ang-II, TGF-ß, and MMP-9. At the same time, there was diminished cardiac-specific expression of SIRT1 and SIRT7, which are extensively implicated in delaying age-dependent cardiomyopathies.
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Galectina 3 , Remodelação Ventricular , Angiotensina II/metabolismo , Animais , Cardiomegalia/patologia , Modelos Animais de Doenças , Fibrose , Galectina 3/genética , Galectina 3/metabolismo , Deleção de Genes , Masculino , Metaloproteinase 9 da Matriz/genética , Metaloproteinase 9 da Matriz/metabolismo , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Knockout , Miocárdio/metabolismo , Sirtuína 1/genética , Sirtuína 1/metabolismo , Fator de Crescimento Transformador beta/metabolismoRESUMO
Computer vision and artificial intelligence applications in medicine are becoming increasingly important day by day, especially in the field of image technology. In this paper we cover different artificial intelligence advances that tackle some of the most important worldwide medical problems such as cardiology, cancer, dermatology, neurodegenerative disorders, respiratory problems, and gastroenterology. We show how both areas have resulted in a large variety of methods that range from enhancement, detection, segmentation and characterizations of anatomical structures and lesions to complete systems that automatically identify and classify several diseases in order to aid clinical diagnosis and treatment. Different imaging modalities such as computer tomography, magnetic resonance, radiography, ultrasound, dermoscopy and microscopy offer multiple opportunities to build automatic systems that help medical diagnosis, taking advantage of their own physical nature. However, these imaging modalities also impose important limitations to the design of automatic image analysis systems for diagnosis aid due to their inherent characteristics such as signal to noise ratio, contrast and resolutions in time, space and wavelength. Finally, we discuss future trends and challenges that computer vision and artificial intelligence must face in the coming years in order to build systems that are able to solve more complex problems that assist medical diagnosis.
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Introducción. La apendicitis constituye la principal causa de abdomen agudo quirúrgico en pediatría. Durante la pandemia por COVID-19, se replantearon las estrategias de manejo ydisminuyeron las consultas en las guardias, lo que podría asociarse a diagnósticos tardíos y complicaciones. El objetivo de este estudio fue analizar el impacto de la pandemia en los niños con apendicitis aguda. Métodos. Estudio analítico retrospectivocomparativo de pacientes pediátricos conapendicitis aguda durante los cinco meses del confinamiento por COVID-19 versus los meses equivalentes del año previo. Se analizaron la incidencia, la clínica, el estadio, el abordajequirúrgico y las complicaciones. Resultados. Los casos totales de apendicitisse redujeron un 25 % (n = 67 versus n = 50 en 2020). El tiempo medio hasta la consulta fue de 24 horas en ambos períodos (p = 0,989). La incidencia de peritonitis fue del 44 % (n = 22) versus el 37 % (n = 22) (p = 0,22) en 2019. No se evidenció diferencia en los estadios deenfermedad de acuerdo con lo informado en los partes quirúrgicos. En 2019, todas las cirugías se realizaron por vía laparoscópica; en 2020, solo un42 % (n = 21). La incidencia de complicaciones fue del 6 %, contra 7,5 % en el período previo (p = 0,75). Un paciente fue COVID-19 positivo. Conclusión. A pesar de la reducción en el númerode casos de apendicitis, no se evidenció una demora en la consulta en nuestra población. El mayor impacto se asoció a la readecuación del manejo, evitando el abordaje laparoscópico para reducir la diseminación del virus.
Introduction. Appendicitis is the leading cause of surgical acute abdomen in pediatrics. During the COVID-19 pandemic, management strategies were reassessed and the number of visits to the emergency department dropped down, which may be associated with delayed diagnoses and complications. The objective of this study was to analyze the impact of the pandemic on children with acute appendicitis. Methods. Analytical, retrospective, comparative study of pediatric patients with acute appendicitis in the 5 months of COVID-19 lockdown versus the same period in the previous year. Incidence, clinical data, stage, surgical approach, and complications were analyzed. Results. The total number of appendicitis cases went down by 25 % (n = 67 versus n = 50 in 2020). The mean time to consultation was 24 hours in both periods (p = 0.989). The incidence of peritonitis was 44 % (n = 22) versus 37 % (n = 22) (p = 0.22) in 2019. No differences were observed in terms of appendicitis stage based on surgery reports. In 2019, all surgeries were laparoscopic; while in 2020, only 42 % (n = 21). The incidence of complications was 6 % versus 7.5 % in the previous period (p = 0.75). One patient was COVID-19 positive. Conclusion. Although in our population the number of appendicitis cases dropped down, consultation was not delayed. The greater impact was associated with the reformulation of management strategies, in which the laparoscopic approach is avoided to reduce virus transmission.
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Humanos , Masculino , Feminino , Recém-Nascido , Lactente , Pré-Escolar , Criança , Adolescente , Apendicectomia/tendências , Apendicite/cirurgia , Apendicite/diagnóstico , Apendicite/epidemiologia , Padrões de Prática Médica/tendências , Diagnóstico Tardio/tendências , COVID-19/prevenção & controle , Acessibilidade aos Serviços de Saúde/tendências , Apendicectomia/métodos , Argentina/epidemiologia , Doença Aguda , Incidência , Estudos Retrospectivos , Laparoscopia/tendências , Pandemias/prevenção & controle , Centros de Atenção Terciária , COVID-19/diagnóstico , COVID-19/epidemiologia , Hospitais GeraisRESUMO
INTRODUCTION: Appendicitis is the leading cause of surgical acute abdomen in pediatrics. During the COVID-19 pandemic, management strategies were reassessed and the number of visits to the emergency department dropped down, which may be associated with delayed diagnoses and complications. The objective of this study was to analyze the impact of the pandemic on children with acute appendicitis. METHODS: Analytical, retrospective, comparative study of pediatric patients with acute appendicitis in the 5 months of COVID-19 lockdown versus the same period in the previous year. Incidence, clinical data, stage, surgical approach, and complications were analyzed. RESULTS: The total number of appendicitis cases went down by 25% (n = 67 versus n = 50 in 2020). The mean time to consultation was 24 hours in both periods (p = 0.989). The incidence of peritonitis was 44% (n = 22) versus 37% (n = 22) (p = 0.22) in 2019. No differences were observed in terms of appendicitis stage based on surgery reports. In 2019, all surgeries were laparoscopic; while in 2020, only 42% (n = 21). The incidence of complications was 6% versus 7.5% in the previous period (p = 0.75). One patient was COVID-19 positive. CONCLUSION: Although in our population the number of appendicitis cases dropped down, consultation was not delayed. The greater impact was associated with the reformulation of management strategies, in which the laparoscopic approach is avoided to reduce virus transmission.
Introducción. La apendicitis constituye la principal causa de abdomen agudo quirúrgico en pediatría. Durante la pandemia por COVID-19, se replantearon las estrategias de manejo y disminuyeron las consultas en las guardias, lo que podría asociarse a diagnósticos tardíos y complicaciones. El objetivo de este estudio fue analizar el impacto de la pandemia en los niños con apendicitis aguda. Métodos. Estudio analítico retrospectivo comparativo de pacientes pediátricos con apendicitis aguda durante los cinco meses del confinamiento por COVID-19 versus los meses equivalentes del año previo. Se analizaron la incidencia, la clínica, el estadio, el abordaje quirúrgico y las complicaciones. Resultados. Los casos totales de apendicitis se redujeron un 25% (n = 67 versus n = 50 en 2020). El tiempo medio hasta la consulta fue de 24 horas en ambos períodos (p = 0,989). La incidencia de peritonitis fue del 44% (n = 22) versus el 37% (n = 22) (p = 0,22) en 2019. No se evidenció diferencia en los estadios de enfermedad de acuerdo con lo informado en los partes quirúrgicos. En 2019, todas las cirugías se realizaron por vía laparoscópica; en 2020, solo un 42% (n = 21). La incidencia de complicaciones fue del 6%, contra 7,5% en el período previo (p = 0,75). Un paciente fue COVID-19 positivo. Conclusión. A pesar de la reducción en el número de casos de apendicitis, no se evidenció una demora en la consulta en nuestra población. El mayor impacto se asoció a la readecuación del manejo, evitando el abordaje laparoscópico para reducir la diseminación del virus.
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Apendicectomia/tendências , Apendicite , COVID-19/prevenção & controle , Diagnóstico Tardio/tendências , Acessibilidade aos Serviços de Saúde/tendências , Padrões de Prática Médica/tendências , Doença Aguda , Adolescente , Apendicectomia/métodos , Apendicite/diagnóstico , Apendicite/epidemiologia , Apendicite/cirurgia , Argentina/epidemiologia , COVID-19/diagnóstico , COVID-19/epidemiologia , Criança , Pré-Escolar , Feminino , Hospitais Gerais , Humanos , Incidência , Lactente , Recém-Nascido , Laparoscopia/tendências , Masculino , Pandemias/prevenção & controle , Estudos Retrospectivos , Centros de Atenção TerciáriaRESUMO
The involvement of natriuretic peptides was studied during the hypertrophic remodeling transition mediated by sequential exposure to chronic hemodynamic overload. We induced hypertension in rats by pressure (renovascular) or volume overload (DOCA-salt) during 6 and 12 weeks of treatment. We also studied the consecutive combination of both models in inverse sequences: RV 6 weeks/DS 6 weeks and DS 6 weeks/RV 6 weeks. All treated groups developed hypertension. Cardiac hypertrophy and left ventricular ANP gene expression were more pronounced in single DS than in single RV groups. BNP gene expression was positively correlated with left ventricular hypertrophy only in RV groups, while ANP gene expression was positively correlated with left ventricular hypertrophy only in DS groups. Combined models exhibited intermediate values between those of single groups at 6 and 12 weeks. The latter stimulus associated to the second applied overload is less effective than the former to trigger cardiac hypertrophy and to increase ANP and BNP gene expression. In addition, we suggest a correlation of ANP synthesis with volume overload and of BNP synthesis with pressure overload-induced hypertrophy after a prolonged treatment. Volume and pressure overload may be two mechanisms, among others, involved in the differential regulation of ANP and BNP gene expression in hypertrophied left ventricles. Plasma ANP levels reflect a response to plasma volume increase and volume overload, while circulating BNP levels seem to be regulated by cardiac BNP synthesis and ventricular hypertrophy.
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BACKGROUND: The heterologous expression of isopentenyl transferase (IPT) under the transcriptional control of the senescence-associated receptor-like kinase (SARK) promoter delayed cellular senescence and, through it, increased drought tolerance in plants. To evaluate the effect of pSARK::IPT expression in bread wheat, six independent transgenic events were obtained through the biolistic method and evaluated transgene expression, phenology, grain yield and physiological biomass components in plants grown under both drought and well-irrigating conditions. Experiments were performed at different levels: (i) pots and (ii) microplots inside a biosafety greenhouse, as well as under (iii) field conditions. RESULTS: Two transgenic events, called TR1 and TR4, outperformed the wild-type control under drought conditions. Transgenic plants showed higher yield under both greenhouse and field conditions, which was positively correlated to grain number (given by more spikes and grains per spike) than wild type. Interestingly, this yield advantage of the transgenic events was observed under both drought and well-watered conditions. CONCLUSIONS: The results obtained allow us to conclude that the SARK promoter-regulated expression of the IPT gene in bread wheat not only reduced the yield penalty produced by water stress but also led to improved productivity under well-watered conditions.
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Resumen (analítico) En este artículo analizamos la participación de los jóvenes en los movimientos alteractivistas de 2011 y los estallidos sociales de 2019, quienes, al parecer, han sido protagonistas de nuevas formas de acción colectiva y conectiva. Desde el enfoque cualitativo de investigación y el método de análisis documental, se revisó un corpus de 61 documentos que comprenden literatura académica e información mediática sobre estos hechos. En los resultados se destacan: la redefinición ontológica y sociopolítica de la condición juvenil a partir de la acción colectiva; el tránsito de prácticas políticas antiglobalización a repertorios de acción colectiva más radicales que buscan resistir a la precariedad y la violencia; y acciones conectivas que transitan de estrategias de replicación a intercambios entre gestores de contenidos y audiencias, por medio de textos multimodales-performativos.
Abstract (analytical) In this article we analyze the participation of young people in the alteractivist movements of 2011 and the social outbreaks of 2019, who, apparently, have been protagonists of new forms of collective and connective action. From the qualitative research approach and the documentary method, we check a corpus of 61 documents about academic literature and media information. The results show: the ontological and sociopolitical redefinition of the youth condition based on collective action; the transition from anti-globalization political practices to more radical repertoires of collective action that seek to resist precariousness and violence; and connective actions that go from replication strategies to exchanges between content managers and audiences, through multimodal-performative texts.
Resumo (analítico) Neste artigo, analisamos a participação dos jovens nos movimentos alterativistas de 2011 e os surtos sociais de 2019, que, aparentemente, foram protagonistas de novas formas de ação coletiva e conectiva. A partir da abordagem qualitativa da pesquisa e do método de análise documental, foi revisado um corpus de 61 documentos que compõem a literatura acadêmica e informações midiáticas sobre esses eventos. Destacam-se os resultados: a redefinição ontológica e sociopolítica da condição juvenil a partir da ação coletiva; a transição das práticas políticas antiglobalização para repertórios mais radicais de ação coletiva que buscam resistir à precariedade e à violência; e ações conectivas que vão desde estratégias de replicação até trocas entre gestores de conteúdo e públicos, por meio de textos multimodal-performativos.
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Pobreza , Adolescente , Repressão Psicológica , Participação SocialRESUMO
ß-Adrenergic blockers are no longer recommended as first-line therapy due to the reduced cardioprotection of traditional ß-blockers compared with other antihypertensive drugs. It is unknown whether third-generation ß-blockers share the limitations of traditional ß-blockers. The aim of the present study was to compare the effects of nebivolol or atenolol on central and peripheral systolic blood pressure (SBP) and its variability and target organ damage (TOD) in N-nitro-L-arginine methyl ester (L-NAME) hypertensive rats. Male Wistar rats were treated with L-NAME for 8 weeks together with oral administration of nebivolol 30 mg/kg (n = 8), atenolol 90 mg/kg (n = 8), or vehicle (n = 8). The control group was composed of vehicle-treated Wistar rats. SBP and its variability, as well as echocardiographic parameters, were assessed during the last 2 weeks of treatment. Tissue levels of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6) and transforming growth factor ß (TGF-ß), and histopathological parameters were evaluated in the left ventricle and aorta. Nebivolol had a greater ability than atenolol to decrease central SBP and mid-term and short-term blood pressure variability (BPV) in L-NAME rats. Echocardiographic analysis showed that nebivolol was more effective than atenolol on E/A wave ratio normalization. Compared with atenolol treatment, nebivolol had a greater protective effect on different TOD markers, inducing a decrease in collagen deposition and a reduction in the proinflammatory cytokines IL-6 and TNF-α in the left ventricle and aorta. Our findings suggest that the adverse hemodynamic profile and the reduced cardiovascular protection reported with traditional ß-blockers must not be carried forward to third-generation ß-blockers.
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Atenolol , Hipertensão , Nebivolol , Animais , Anti-Hipertensivos/farmacologia , Atenolol/farmacologia , Pressão Sanguínea/efeitos dos fármacos , Pressão Sanguínea/fisiologia , Hipertensão/tratamento farmacológico , Masculino , Nebivolol/farmacologia , Ratos , Ratos Wistar , Resultado do TratamentoRESUMO
BACKGROUND: This study aims to compare the characteristics between patients who underwent aortic valve replacement (AVR) through a J-shaped upper mini-sternotomy (UMS) and patients who underwent full sternotomy (FS) in the basis of clinical care and hospital outcomes. METHODS: A retrospective, cross-sectional study was conducted on adult patients who were subjected to AVR by UMS from 2014 to 2017, compared with a historical control of patients who had undergone UMS by FS from 2011 to 2014. Patients, who received combined valve replacement or aortic surgery, as well as heart valve reinterventions due to endocarditis, were excluded. Sociodemographic characteristics, medical history, hospital and intensive care stay, blood transfusions, complications, and mortality of both procedures were compared. RESULTS: There were 57 patients under UMS and 99 patients under FS included in this study. The median age was 67 years, and 56.77% of the patients were male. No differences were observed in the past medical history and the type of valve implanted between the groups. During surgery, patients under UMS received a lower percentage of red blood cell and platelet transfusions compared with FS. However, UMS had a higher percentage of cryoprecipitate transfusion. Intensive care stay was shorter in UMS compared with FS (three days; interquartile range [IQR], 2-4; and four days; IQR, 2-6, respectively) without differences in overall hospital stay, postoperative complications, in-hospital mortality, and 30-day mortality. CONCLUSIONS: The J-shaped upper mini-sternotomy is a feasible surgical technique that does not increase in-hospital or 30-day mortality, neither hospital stay nor infectious complications.
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Valva Aórtica/cirurgia , Doenças das Valvas Cardíacas/cirurgia , Implante de Prótese de Valva Cardíaca/métodos , Procedimentos Cirúrgicos Minimamente Invasivos/métodos , Esternotomia/métodos , Idoso , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Resultado do TratamentoRESUMO
We studied the role of galectin-3 (Gal-3) in the expression of alternative activation markers (M2) on macrophage, cytokines, and fibrosis through the temporal evolution of healing, ventricular remodeling, and function after myocardial infarction (MI). C57BL/6J and Gal-3 knockout mice (Lgals3-/-) were subjected to permanent coronary ligation or sham. We studied i) mortality, ii) macrophage infiltration and expression of markers of alternative activation, iii) cytokine, iv) matrix metalloproteinase-2 activity, v) fibrosis, and vi) cardiac function and remodeling. At 1 week post-MI, lack of Gal-3 markedly attenuated F4/80+ macrophage infiltration and significantly increased the expression of Mrc1 and Chil1, markers of M2 macrophages at the MI zone. Levels of IL-10, IL-6, and matrix metalloproteinase-2 were significantly increased, whereas tumor necrosis factor-α, transforming growth factor-ß, and fibrosis were remarkably attenuated at the infarct zone. In Gal-3 knockout mice, scar thinning ratio, expansion, and cardiac remodeling and function were severely affected from the onset of MI. At 4 weeks post-MI, the natural evolution of fibrosis in Gal-3 knockout mice was also affected. Our results suggest that Gal-3 is essential for wound healing because it regulates the dynamics of macrophage infiltration, proinflammatory and anti-inflammatory cytokine expression, and fibrosis along the temporal evolution of MI in mice. The deficit of Gal-3 affected the dynamics of wound healing, thus aggravating the evolution of remodeling and function.
Assuntos
Galectina 3/metabolismo , Macrófagos/patologia , Infarto do Miocárdio/patologia , Remodelação Ventricular/fisiologia , Cicatrização/fisiologia , Animais , Macrófagos/metabolismo , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Knockout , Infarto do Miocárdio/metabolismoRESUMO
INTRODUCTION: The latest American College of Cardiology and American Heart Association (ACC/AHA) Guidelines for high blood pressure in adults bring changes with lower cut-off points, creating socioeconomic issues in low and middle income countries. It is necessary to consider the changes that would have the adherence to these new guidelines in diagnosis and hypertension (HTN) control with ambulatory blood pressure monitoring (ABPM), the gold standard for hypertension diagnosis. AIM: To describe the changes in hypertension diagnosis and control according to the latest ACC/AHA guidelines, the European Society of Cardiology and European Society of Hypertension (ESC/ESH) and Latin-America Society of Hypertension (LASH) guidelines. METHODS: Cross-sectional, descriptive, retrospective study of all patients who have had an ABPM during June 2017 and June 2018 according to cut-off points established by the ACC/AHA Guidelines compared to the ESC/LASH Guidelines. RESULTS: 1957 patients evaluated with ABPM were included; median age was 57 years, 55% were female. The difference in diagnosis by 24-h ABPM, day-time, and night-time cycle was 21%, 42%, and 24% higher applying ACC/AHA guidelines vs ESC/ESH guidelines. There were no significant differences regarding the history of HTN, gender, and age in the circadian pattern. CONCLUSION: If the measured value of blood pressure in the 24-h ABPM is taken into account, it would necessary to intervene pharmacologically 21.5% more individuals according to the ACC/AHA guidelines in our population, Individualization is awarded.
Assuntos
Pressão Arterial , Monitorização Ambulatorial da Pressão Arterial/normas , Hipertensão/diagnóstico , Guias de Prática Clínica como Assunto/normas , Idoso , Ritmo Circadiano , Colômbia/epidemiologia , Estudos Transversais , Feminino , Humanos , Hipertensão/epidemiologia , Hipertensão/fisiopatologia , Masculino , Pessoa de Meia-Idade , Valor Preditivo dos Testes , Prevalência , Reprodutibilidade dos Testes , Fatores de TempoRESUMO
Resumen La infección por SARS-CoV2 es una pandemia. Se creía que el primer caso de esta enfermedad ocurrió el 8 de diciembre de 2019 en la provincia de Hubei en China, aunque posteriormente se indicó que el primer caso confirmado por laboratorio ocurrió el 1.( de diciembre de 2019 ante la presencia de un brote de neumonía en 59 pacientes sospechosos en un mercado local de mariscos en Wuhan. No solo produce patología respiratoria, con frecuencia compremete el sistema cardiovascular ya que produce lesión miocárdica, miocarditis, y, con cierta frecuencia, aumenta la descompensación de enfermedades cardiovasculares preestablecidas. En este artículo se trata de dilucidar el componente cardiovascular hasta ahora existente en la literatura y se sugieren algunos pasos a seguir en pacientes con estas enfermedades, acorde con la evidencia actual.
Abstract Infection due to SARS-CoV2 is a pandemic. It is believed that the first case occurred on 8 December 2019 in Hubei province in China, although it was later indicated that the first laboratory-confirmed case occurred on 1 December 2019 due to the presence of an outbreak of suspected pneumonia in 59 patients in a shellfish market in Wuhan. It not only caused a respiratory disease, it often compromised the cardiovascular system since it produces a myocardial lesion, myocarditis, and, less often, increased the decompensation of pre-established cardiovascular diseases. An attempt is made in this article to elucidate the cardiovascular component presented in the current literature, and to suggest some steps to follow in patients with these diseases in accordance with the current evidence.
Assuntos
Humanos , Masculino , Feminino , Coronavirus , Insuficiência Cardíaca , Pneumonia , Síndrome do Desconforto Respiratório do Recém-Nascido , Traumatismo por Reperfusão Miocárdica , Síndrome Respiratória Aguda Grave , MiocarditeRESUMO
There are several unmet needs in modern immunology. Among them, vaccines against parasitic diseases and chronic infections lead. Trypanosoma cruzi, the causative agent of Chagas disease, is an excellent example of a silent parasitic invasion that affects millions of people worldwide due to its progression into the symptomatic chronic phase of infection. In search for novel vaccine candidates, we have previously introduced Traspain, an engineered trivalent immunogen that was designed to address some of the known mechanisms of T. cruzi immune evasion. Here, we analyzed its performance in different DNA prime/protein boost protocols and characterized the systemic immune response associated with diverse levels of protection. Formulations that include a STING agonist, like c-di-AMP in the boost doses, were able to prime a Th1/Th17 immune response. Moreover, comparison between them showed that vaccines that were able to prime polyfunctional cell-mediated immunity at the CD4 and CD8 compartment enhanced protection levels in the murine model. These findings contribute to a better knowledge of the desired vaccine-elicited immunity against T. cruzi and promote the definition of a vaccine correlate of protection against the infection.