Efeito de uma capacitação em reanimação cardiopulmonar no conhecimento, satisfação e autoconfiança na aprendizagem de enfermeiros: estudo quase-experimental / Effect of cardiopulmonary resuscitation training on knowledge, satisfaction and self-confidence in learning of nurses: a quasi-experimental study / Efecto del entrenamiento en reanimación cardiopulmonar sobre el conocimiento, la satisfacción y la autoconfianza en el aprendizaje de enfermeros: un estudio cuasi experimental

Objetivo: avaliar o efeito de uma capacitação que associa abordagem teórica com simulação clínica em reanimação cardiopulmonar no conhecimento, satisfação e autoconfiança na aprendizagem de enfermeiros. Métodos: estudo quase-experimental, realizado com enfermeiros de um hospital terciário, por meio de capacitação teórica e simulação clínica de reanimação cardiopulmonar. Antes e após a capacitação foram aplicados questionários; a Escala de Satisfação do Estudante e Autoconfiança na Aprendizagem foi aplicada após a capacitação. Resultados: participaram 31 enfermeiros, 90,32% eram do sexo feminino, com média de idade de 33,93 anos (DP = 9,02). A média de acertos no questionário pré-teste foi 8,90 (DP ± 1,95) e a média de acertos pós-teste foi de 11,58 (DP ± 1,26; p < 0,001). Quanto à satisfação e autoconfiança a média geral foi 4,51 (DP ± 0,10). Conclusão: a intervenção educativa utilizada para capacitação, que associa abordagem teórica e simulação clínica em reanimação cardiopulmonar promove melhora do conhecimento dos enfermeiros em suporte básico e avançado de vida, satisfação e autoconfiança na aprendizagem.

Objective: to evaluate the effect of a training that combines a theoretical approach with clinical simulation in cardiopulmonary resuscitation on the knowledge, satisfaction and self-confidence in learning of nurses. Methods:quasi-experimental study conducted with nurses from a tertiary hospital, through theoretical training and clinical simulation of cardiopulmonary resuscitation. Questionnaires were applied before and after the training; the Scale of Student Satisfaction and Self-Confidence in Learning was applied after training. Results:thirty-one nurses participated, 90.32% were female, mean age of 33.93 years (SD = 9,02). The mean number of correct answers in the pre-test questionnaire was 8.90 (SD ± 1.95) and after the test it was 11.58 (SD ± 1.26; p < 0.001). As for satisfaction and self-confidence, the overall average was 4.51 (SD ± 0.10). Conclusion: the educational intervention used in training, which combines a theoretical approach and clinical simulation in cardiopulmonary resuscitation, improves nurses' knowledge of basic and advanced life support, satisfaction and self-confidence in learning.

Objetivo: evaluar el efecto de un entrenamiento que combina un enfoque teórico con simulación clínica en reanimación cardiopulmonar sobre el conocimiento, la satisfacción y la autoconfianza en el aprendizaje de los enfermeros. Métodos: estudio cuasi experimental realizado con enfermeros de un hospital de tercer nivel, mediante entrenamiento teórico y simulación clínica de reanimación cardiopulmonar. Se aplicaron cuestionarios antes y después de la capacitación; después del entrenamiento se aplicó la Escala de Satisfacción y Autoconfianza del Estudiante en el Aprendizaje. Resultados: participaron 31 enfermeros, 90,32% del sexo femenino, edad media de 33,93 años (DE = 9,02). La media de aciertos en el cuestionario pretest fue de 8,90 (DE ± 1,95) y después del test fue de 11,58 (DE ±1,26; p < 0,001). En cuanto a la satisfacción y autoconfianza, la media global fue de 4,51 (DE ± 0,10). Conclusión: la intervención educativa utilizada para la formación, que combina el enfoque teórico y la simulación clínica en reanimación cardiopulmonar, mejora el conocimiento de los enfermeros sobre el soporte vital básico y avanzado, la satisfacción y la autoconfianza en el aprendizaje.

Perfil de IL-6 e TNF na Formação de Células Espumosas: Um Método Aprimorado Usando a Sonda de Isotiocianato de Fluoresceína (FITC) / Profile of IL-6 and TNF in Foam Cell Formation: An Improved Method Using Fluorescein Isothiocyanate (FITC) Probe

Resumo Fundamento A formação de células espumosas ocorre devido ao aumento em lipoproteína plasmática de baixa densidade (LDL) e desregulação da inflamação, sendo importante para o desenvolvimento da aterosclerose. Objetivo Avaliar o perfil do fator de necrose tumoral alfa (TNF-α) e da interleucina-6 (IL-6) no método de formação da célula espumosa existente, otimizando esse protocolo. Métodos A LDL foi isolada, oxidada e marcada com sonda de isotiocianato de fluoresceína (FITC). As células espumosas foram geradas de célula derivada de monócitos humanos THP-1 e incubadas na ausência (controle) ou presença de FITC-ox-LDL (10, 50, 100, 150 ou 200 μg/mL), por 12, 24, 48 ou 72 horas. A FITC-ox-LDL na célula foi quantificada por microscopia. O ensaio de imunoabsorção enzimática foi avaliado para quantificar a IL-6 e o TNF-α, com um p <0,05 considerado significativo. Resultados Todas as concentrações de FITC-ox-LDL testadas apresentaram fluorescência mais alta em comparação com o controle, demonstrando maior acúmulo de lipoproteínas nas células. Quanto mais alta a concentração de FITC-ox-LDL, maior a produção de TNF-α e IL-6. A produção de IL-6 pelas células espumosas foi detectada até o valor de 150 µg/mL da LDL máxima de estímulo. Concentrações acima de 50 μg/mL de LDL estimularam maior liberação de TNF-α comparado ao controle. Conclusões Nosso modelo contribui para o entendimento da liberação de IL-6 e TNF-α em resposta a várias concentrações de ox-LDL usando o método otimizado para a formação de células espumosas.

Abstract Background The formation of foam cells occurs due to the increase in low-density plasma lipoprotein (LDL) and dysregulation of inflammation, which is important for the development of atherosclerosis. Objective To evaluate the profile of tumor necrosis factor-alpha (TNF-α) and Interleukin-6 (IL-6) in the existing foam cell formation method, optimizing this protocol. Methods The LDL was isolated, oxidized, and labeled with a Fluorescein isothiocyanate (FITC) probe. Foam cells were generated from THP-1 human monocyte-derived cells and incubated in the absence (control) or presence of FITC-ox-LDL (10, 50, 100, 150, or 200 μg/mL), for 12, 24, 48, or 72 hours. The accumulated FITC-ox-LDL in the cell was quantified by microscopy. The enzyme-linked immunosorbent assay was evaluated to quantify the IL-6 and TNF-α, with p < 0.05 considered significant. Results All the FITC-ox-LDL concentrations tested showed a higher fluorescence when compared to the control, showing a greater accumulation of lipoprotein in cells. The higher the concentration of FITC-ox-LDL, the greater the production of TNF-α and IL-6. The production of IL-6 by foam cells was detected up to the value of 150 µg/mL of the maximum stimulus for LDL. Concentrations above 50 μg/mL LDL stimulated greater release of TNF-α compared to control. Conclusions Our model contributes to the understanding of the release of IL-6 and TNF-α in response to different concentrations of ox-LDL, using an optimized method for the formation of foam cells.

Profile of IL-6 and TNF in Foam Cell Formation: An Improved Method Using Fluorescein Isothiocyanate (FITC) Probe. / Perfil de IL-6 e TNF na Formação de Células Espumosas: Um Método Aprimorado Usando a Sonda de Isotiocianato de Fluoresceína (FITC).

BACKGROUND: The formation of foam cells occurs due to the increase in low-density plasma lipoprotein (LDL) and dysregulation of inflammation, which is important for the development of atherosclerosis. OBJECTIVE: To evaluate the profile of tumor necrosis factor-alpha (TNF-α) and Interleukin-6 (IL-6) in the existing foam cell formation method, optimizing this protocol. METHODS: The LDL was isolated, oxidized, and labeled with a Fluorescein isothiocyanate (FITC) probe. Foam cells were generated from THP-1 human monocyte-derived cells and incubated in the absence (control) or presence of FITC-ox-LDL (10, 50, 100, 150, or 200 µg/mL), for 12, 24, 48, or 72 hours. The accumulated FITC-ox-LDL in the cell was quantified by microscopy. The enzyme-linked immunosorbent assay was evaluated to quantify the IL-6 and TNF-α, with p < 0.05 considered significant. RESULTS: All the FITC-ox-LDL concentrations tested showed a higher fluorescence when compared to the control, showing a greater accumulation of lipoprotein in cells. The higher the concentration of FITC-ox-LDL, the greater the production of TNF-α and IL-6. The production of IL-6 by foam cells was detected up to the value of 150 µg/mL of the maximum stimulus for LDL. Concentrations above 50 µg/mL LDL stimulated greater release of TNF-α compared to control. CONCLUSIONS: Our model contributes to the understanding of the release of IL-6 and TNF-α in response to different concentrations of ox-LDL, using an optimized method for the formation of foam cells.

FUNDAMENTO: A formação de células espumosas ocorre devido ao aumento em lipoproteína plasmática de baixa densidade (LDL) e desregulação da inflamação, sendo importante para o desenvolvimento da aterosclerose. OBJETIVO: Avaliar o perfil do fator de necrose tumoral alfa (TNF-α) e da interleucina-6 (IL-6) no método de formação da célula espumosa existente, otimizando esse protocolo. MÉTODOS: A LDL foi isolada, oxidada e marcada com sonda de isotiocianato de fluoresceína (FITC). As células espumosas foram geradas de célula derivada de monócitos humanos THP-1 e incubadas na ausência (controle) ou presença de FITC-ox-LDL (10, 50, 100, 150 ou 200 µg/mL), por 12, 24, 48 ou 72 horas. A FITC-ox-LDL na célula foi quantificada por microscopia. O ensaio de imunoabsorção enzimática foi avaliado para quantificar a IL-6 e o TNF-α, com um p <0,05 considerado significativo. RESULTADOS: Todas as concentrações de FITC-ox-LDL testadas apresentaram fluorescência mais alta em comparação com o controle, demonstrando maior acúmulo de lipoproteínas nas células. Quanto mais alta a concentração de FITC-ox-LDL, maior a produção de TNF-α e IL-6. A produção de IL-6 pelas células espumosas foi detectada até o valor de 150 µg/mL da LDL máxima de estímulo. Concentrações acima de 50 µg/mL de LDL estimularam maior liberação de TNF-α comparado ao controle. CONCLUSÕES: Nosso modelo contribui para o entendimento da liberação de IL-6 e TNF-α em resposta a várias concentrações de ox-LDL usando o método otimizado para a formação de células espumosas.

Validación de checklist para evaluación de la capacitación con simulación clínica de la atención al paciente séptico / Checklist validation for evaluation of training with clinical simulation of septic patient care / Validação de checklist para avaliação da capacitação com simulação clínica do atendimento ao paciente séptico

Objetivo: Construir y validar el contenido de un checklist para evaluación de la capacitación de profesionales del área de la salud en la atención al paciente séptico con simulación clínica. Método: Estudio de validación metodológica de instrumento, con delineamiento estructural en dos etapas: construcción del instrumento y validación de contenido del checklist utilizando la técnica Delphi en dos rondas. Resultados: La validación de contenido fue compuesta por diez ítems y cuarenta y tres subítems analizados por los evaluadores. A través del Índice de Validez de Contenido, se identificaron cuatro ítems con fuerte evidencia de validación, Índice de Validez de Contenido ≥ 0,8. En la segunda ronda Delphi presentó un porcentaje de concordancia superior al 80% para todas las variables pertinentes al instrumento. Se reestructuró el checklist según recomendaciones de los evaluadores, manteniendo los diez ítems, pero con reducción para veintiséis subítems, que en la segunda ronda Delphi presentó un porcentaje de concordancia superior al 80% para todas las variables pertinentes al instrumento. Conclusión: Método fue eficaz para validar el contenido de un checklist que evaluará la capacitación de profesionales de la salud en la atención al paciente séptico, por medio de simulación clínica

Aims: Development and validation of the contents of a checklist to evaluate the qualification of health professionals in septic patient care with clinical simulation. Method: instrument validation study, with two-stage structural design: instrument construction and validation of the checklist contents using the Delphi technique in two rounds. Results: The content validation was composed of ten items and forty-three sub-items analyzed by the evaluators. Through the Content Validity Index, four items with strong validation evidence were identified, Content Validity Index ≥ 0.8. We restructured the checklist according to the evaluators recommendations, maintaining the ten items, but reducing them to twenty-six sub-items, which in the second round Delphi presented a percentage of agreement above 80% for all variables relevant to the instrument. Conclusion: This method was effective to validate the checklist contents that will evaluate the qualification of health professionals in septic patient care, through clinical simulation

Objetivos: Construir e validar o conteúdo de um checklist para avaliação da capacitação de profissionais da área da saúde no atendimento ao paciente séptico com simulação clínica. Método: Estudo de validação metodológica de instrumento, com delineamento estrutural em duas etapas: construção do instrumento e validação de conteúdo do checklist utilizando a técnica Delphi em duas rodadas. Resultados: A validação de conteúdo foi composta por dez itens e quarenta e três subitens analisados pelos avaliadores. Por meio do Índice de Validade de Conteúdo, identificaram-se quatro itens com forte evidência de validação, Índice de Validade de Conteúdo ≥ 0,8. Reestruturou o checklist conforme recomendações dos avaliadores, mantendo os dez itens, porém com redução para vinte e seis subitens, que na 2ª rodada Delphi apresentou percentual de concordância acima de 80% para todas as variáveis pertinentes ao instrumento. Conclusão: Método foi eficaz para validar o conteúdo de um checklist que avaliará a capacitação de profissionais da saúde no atendimento ao paciente séptico, por meio de simulação clínica

Alphavbeta3 integrin blocking inhibits apoptosis and induces autophagy in murine breast tumor cells.

Integrins are cell receptors that mediate adhesion to the extracellular matrix (ECM) and regulate cell migration, a crucial process in tumor invasion. The αvß3 integrin recognizes the arginine-glycine-aspartic acid (RGD) motif in ECM proteins and it can be antagonized by RGD-peptides, resulting in decreased cell migration and invasion. RGD-based drugs have shown disappointing results in clinical trials; however, the reasons for their lack of activity are still obscure. Aiming to contribute to a better understanding of the molecular consequences of integrin inhibition, we tested a recombinant RGD-disintegrin (DisBa-01) in two types of murine cell lines, breast tumor 4T1BM2 cells and L929 fibroblasts. Only tumor cells showed decreased motility and adhesion, as well as morphologic alterations upon DisBa-01 treatment (100 and 1000 nM). This result was attributed to the higher levels of αvß3 integrin in 4T1BM2 cells compared to L929 fibroblasts making the former more sensitive to DisBa-01 blocking. DisBa-01 induced cell cycle arrest at the S phase in 4T1BM2 cells, but it did not induce apoptosis, which was consistent with the decrease in caspase-3, 8 and 9 expression at mRNA and protein levels. DisBa-01 increases PI3K, Beclin-1 and LC3B expression in tumor cells, indicators of autophagic induction. In conclusion, αvß3 integrin blocking by DisBa-01 results in inhibition of adhesion and migration and in the activation of an autophagy program, allowing prolonged survival and avoiding immediate apoptotic death. These observations suggest new insights into the effects of RGD-based inhibitors considering their importance in drug development for human health.

Reduced collagen accumulation and augmented MMP-2 activity in left ventricle of old rats submitted to high-intensity resistance training.

Progressive fibrosis is a hallmark of the aging heart. Age-related fibrosis is modulated by endurance exercise training; however, little is known concerning the influence of resistance training (RT). Therefore we investigated the chronic effects of high-intensity RT on age-associated alterations of left ventricle (LV) structure, collagen content, matrix metalloproteinase-2 (MMP-2), and extracellular matrix-related gene expression, including transforming growth factor-ß (TGF-ß). Young adult (3 mo) and aged (21 mo) male Wistar rats were submitted to a RT protocol (ladder climbing with 65, 85, 95, and 100% load), three times a week for 12 wk. Forty-eight hours posttraining, arterial systolic and diastolic pressure, LV end-diastolic pressure (LVEDP) and dP/dt were recorded. LV morphology, collagen deposition, and gene expression of type I (COL-I) and type III (COL-III) collagen, MMP-2, tissue inhibitor of metalloproteinases-1 (TIMP-1), and TGF-ß1 were analyzed by quantitative reverse transcriptase-PCR. MMP-2 content was assessed by zymography. Increased collagen deposition was observed in LV from aged rats. These parameters were modulated by RT and were associated with increased MMP-2 activity and decreased COL-I, TGF-ß1, and TIMP-1 mRNA content. Despite the effect of RT on collagen accumulation, there was no improvement on LVEDP and maximal negative LV dP/dt of aged rats. Cardiomyocyte diameter was preserved in all experimental conditions. In conclusion, RT attenuated age-associated collagen accumulation, concomitant to the increase in MMP-2 activity and decreased expression of COL-I, TGF-ß1, and TIMP-1 in LV, illustrating a cardioprotective effect of RT on ventricular structure and function.NEW & NOTEWORTHY We demonstrated the beneficial resistance-training effect against age-related left ventricle collagen accumulation in the left ventricle, which was associated with decreased type I collagen (COL-I), transforming growth factor-ß1 (TGF-ß1), and tissue inhibitor of metalloproteinases-1 (TIMP-1) gene expression and matrix metalloproteinase-2 (MMP-2) activity. Our findings suggest for the first time the potential effects of resistance training in modulating collagen accumulation and possibly fibrosis in the aging heart.

ADAM9 silencing inhibits breast tumor cells transmigration through blood and lymphatic endothelial cells.

ADAMs are transmembrane multifunctional proteins that contain disintegrin and metalloprotease domains. ADAMs act in a diverse set of biological processes, including fertilization, inflammatory responses, myogenesis, cell migration, cell proliferation and ectodomain cleavage of membrane proteins. These proteins also have additional functions in pathological processes as cancer and metastasis development. ADAM9 is a member of ADAM protein family that is overexpressed in several types of human carcinomas. The aim of this study was to investigate the role of ADAM9 in hematogenous and lymphatic tumor cell dissemination assisting the development of new therapeutic tools. The role of ADAM9 in the interaction of breast tumor cells (MDA-MB-231) and endothelial cells was studied through RNA silencing. ADAM9 silencing in MDA-MB-231 cells had no influence in expression of several genes related to the metastatic process such as ADAM10, ADAM12, ADAM17, cMYC, MMP9, VEGF-A, VEGF-C, osteopontin and collagen XVII. However, there was a minor decrease in ADAM15 expression but an increase in that of MMP2. Moreover, ADAM9 silencing had no effect in the adhesion of MDA-MB-231 cells to vascular (HMEC-1 and HUVEC) and lymphatic cells (HMVEC-dLyNeo) under flow condition. Nevertheless, siADAM9 in MDA-MB-231 decreased transendothelial cell migration in vitro through HUVEC, HMEC-1 and HMVEC-dLyNeo (50%, 40% and 32% respectively). These results suggest a role for ADAM9 on the extravasation step of the metastatic cascade through both blood and lymph vessels.