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Id: biblio-1179935
Autor: Santos, Rogério Luiz dos.
Título: Análise da expressão de citocinas e quimiocinas, dos agregados de plaquetas-leucócitos e dos mediadores solúveis sCD40L e sCD62P no melanoma cutâneo / Analysis of the expression of cytokines and chemokines, platelet-leukocyte aggregates and soluble mediators sCD40L and sCD62P in cutaneous melanoma.
Fonte: São Paulo; s.n; 2019. 110 p. ilust, tabelas, quadros.
Idioma: pt.
Tese: Apresentada a Fundação Antônio Prudente para obtenção do grau de Doutor.
Resumo: Introdução: O melanoma cutâneo é uma neoplasia maligna dos melanócitos da pele com incidência variável no mundo e o prognóstico é desfavorável nos estágios mais avançados. O desenvolvimento do melanoma está associado ao sistema imunológico e a maior evolução no seu tratamento se deu a partir de medicamentos baseados no estímulo da resposta imune contra o tumor. Objetivo: Avaliar a expressão de citocinas e quimiocinas, dos agregados de plaquetas-leucócitos e de mediadores solúveis sCD40L e sCD62P no sangue de pacientes com melanoma cutâneo. Métodos: Foi realizado um estudo transversal em pacientes com melanoma cutâneo admitidos para tratamento cirúrgico no Hospital de Câncer de Pernambuco (HCP), entre os anos de 2015 e 2018. Foram incluídos 51 pacientes (média de 57,6 anos) com diagnóstico de melanoma cutâneo, e como grupo controle, 30 indivíduos saudáveis (média de 56,7 anos). As coletas de sangue foram realizadas antes da ressecção do melanoma. A determinação dos níveis de citocinas IL6, IL10, TNF, IL1 e IL12p70 e das quimiocinas CXCL10 (IP10), CCL2 (MCP-1), CXCL9 (MIG), CCL5 (RANTES) e CXCL8 (IL8), sCD40L e sCD62P, e agregados plaquetas-leucócitos foi realizada por citometria de fluxo. Foram realizadas análises entre os grupos de pacientes e controles, e pelos parâmetros como tipo histológico, estadio, espessura de Breslow e presença de metástases linfonodais. O teste de Mann-Whitney foi utilizado para comparação entre dois grupos, e de Kruskal-Wallis para as análises entre três ou mais grupos. Foi considerado significativo p<0,05. Resultados: Não houve detecção de IL1 e IL12 no sangue dos pacientes e controles. Verificou-se níveis elevados das citocinas IL10 e diminuídos de TNF nos pacientes comparados ao grupo controle, (p<0,0001). A IL6 esteve aumentada nos pacientes com estadio II em relação ao III (p=0,017) e em pacientes com linfonodos negativos (p<0,0001). Foram encontrados níveis reduzidos da quimiocina CCL5 (p=0,009) nos pacientes quando comparados ao grupo controle. O percentual de agregação plaquetária em linfócitos, monócitos e neutrófilos também foi elevado nos pacientes comparado ao grupo controle (p<0,0001, p=0,009 e p<0,0001 respectivamente). Foram encontrados níveis elevados de agregados plaquetas-monócitos nos pacientes com linfonodos positivos (p=0,008). Os níveis solúveis sCD40L e sCD62P foram elevados nos pacientes comparados aos controles (p=0,03 e p=0,006, respectivamente). Conclusão: Os dados obtidos das análises realizadas mostram que os pacientes com melanoma cutâneo apresentam um perfil imunossupressor com a participação de plaquetas e monócitos/macrófagos que favorecem a progressão tumoral

Cutaneous melanoma is a malignancy originated from the skin melanocytes, with a variable incidence worldwide and a poor prognosis in advanced stages. Melanoma growth is closely associated with the immune system and the most important treatment advances resulted from stimulation of immune response against the tumor. Objective: To evaluate the expression of cytokines and chemokines, platelet-leukocyte aggregates and soluble mediators sCD40L and sCD62P in the blood of patients with cutaneous melanoma. Methods: A cross-sectional study was performed in cutaneous melanoma patients admitted for surgical treatment at the Hospital de Câncer de Pernambuco (HCP) between 2015 and 2018. Fifty-one patients (mean age 57.6 years) with a diagnosis of melanoma were included, and 30 healthy individuals (mean age 56.7 years) were chosen as the control group. The blood samples were taken before resection of the melanoma. The determination of cytokines IL6, IL10, TNFα, IL1ß and IL12p70 and chemokines CXCL10 (IP10), CCL2 (MCP-1), CXCL9 (MIG), CCL5 (RANTES) and CXCL8 (IL8), sCD40L and sCD62P, and platelet-leukocyte aggregate was performed by flow cytometry. Analysis were performed between patient and control groups, and by parameters such as histological type, stage, Breslow thickness, and presence of lymph node metastases. Mann-Whitney test was used for comparison between the two groups, and Kruskal-Wallis test for analysis between three or more groups. It was considered significant p <0.05. Results: There was no detection of IL1ß and IL12 in the blood of patients and controls. Elevated levels of IL10 and decreased TNFα cytokines were found in patients compared to the control group (p <0.0001). IL6 was increased in patients with stage II compared to III (p=0.017) and in patients with negative lymph nodes (p <0.0001). Reduced CCL5 chemokine levels (p=0.009) were found in patients compared to the control group. The percentage of platelet aggregation in lymphocytes, monocytes and neutrophils was also high in patients when compared to the control group (p <0.05). High levels of platelet-monocyte aggregates were found in patients with positive lymph nodes (p=0.008). Soluble sCD40L and sCD62P levels were elevated in patients compared to controls (p=0.03 and p=0.006, respectively). Conclusion: The data obtained from the analysis performed show that patients with cutaneous melanoma have an immunosuppressive profile with platelet participation and monocytes/macrophages that favor tumor progression
Descritores: Agregação Plaquetária
Citocinas
Selectina-P
Quimiocinas
Ligante de CD40
Melanoma
Limites: Humanos
Masculino
Feminino
Adulto
Pessoa de Meia-Idade
Idoso
Responsável: BR30.1 - Biblioteca
BR30.1


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Id: biblio-1104226
Autor: Pavlov, Sergey; Babenko, Nataliia; Kumetchko, Marina; Litvinova, Olga; Semko, Natalia; Pavlova, Olga.
Título: Intercellular mediators in bone remodeling regulation in the experimental renal pathology / Mediadores intercelulares de la regulación de la remodelación ósea en un modelo experimental de patología renal
Fonte: Actual. osteol;15(3):180-191, Sept-Dic. 2019. ilus.
Idioma: en.
Resumo: Bone metabolism disorders are characterized by an imbalance of bone resorption and formation in the bone remodeling process. Glucocorticoids that are used to treat kidney diseases exacerbate these disorders. P-selectin and galectin-3 are molecules involved in the sclerotic process in kidney, whereas bone resorption is regulated by the interaction between the nuclear factor activator kappa b receptor (RANK), its ligand (RANKL) and the RANKL decoy receptor osteoprotegerin (OPG). The aim of this study was to investigate the cellular and molecular mechanisms of disruption of bone remodeling regulation processes, reflected by intercellular mediators (RANKL, OPG, P-selectin and galectin-3) in chronic kidney disease experimental model treated with glucocorticoids. Rats were divided into four groups of 10 animals each. The first group, the control group, included intact animals. The second group consisted of rats with impaired bone remodeling resulting from chronic kidney disease (experimental group (CKD). The third group was a group of animals with impaired bone remodeling due to exposure to glucocorticoids (experimental group (GCs)). The fourth group consisted of rats with impaired bone remodeling in chronic kidney disease, followed by exposure to glucocorticoids (experimental group (CKD + GCs)). The effects of CKD and glucocorticoid were evaluated biochemically, histologically and by measuring bone density. An enzymelinked immunoassay was used to measure intercellular mediator levels in the serum. The bone density in the experimental groups was reduced compared to the control group. RANKL levels in animals of three experimental groups were higher than in intact animals. Serum levels of OPG were higher in CKD and GCs groups than in intact animals. At the same time, in the animals' blood serum of the CKD + GCs group, the levels of OPG were lower, than those in animals from the control group. The levels of galectin-3 in the serum of the experimental groups GCs and CKD + GCs were lower than in intact animals. The serum levels of galectin-3 in animals of the CKD group were higher than those in animals from the control group. The levels of P-selectin were lower in the serum of the GCs group than in intact animals. At the same time, the levels of P-selectin were higher in the CKD and CKD + GCs groups, than those in animals from the control group. In conclusion, the study of the complex system of bone remodeling regulation, which includes many factors and their interactions, may lead to the development of new methods for treating patients with chronic kidney disease in order to prevent osteoporosis in the future. (AU)

Las enfermedades metabólicas óseas se caracterizan por un desequilibrio en el proceso de remodelación ósea en los que participan mediadores tales como receptor del activador del factor nuclear- kappa- b (RANK), su ligando (RANKL) y la osteoprotegerina (OPG). Los glucocorticoides, recuentemente empleados en el tratamiento de la enfermedad renal crónica, exacerban este desequilibrio. En la enfermedad esclerótica renal, las moléculas de adhesión celular P-selectina and galectina-3 tienen un rol fundamental. El objetivo de esta trabajo fue estudiar las alteraciones en los mediadores de la remodelación ósea (RANKL, OPG, P-selectina and galectina-3) en un modelo de enfermedad renal crónica con tratamiento glucocorticoideo. Ratas Wistar hembras fueron divididos en 4 grupos: control (C); enfermedad renal crónica con afección de la remodelación ósea (ERC); animales con afección de la remodelación ósea expuestos a glucocorticoides (GC); enfermedad renal crónica con afección de la remodelación ósea tratados con glucocorticoides (ERC+GC). Los efectos de la ERC y los GC fueron evaluados bioquímicamente, histológicamente y por medición de la densidad ósea. RANKL, OPG, Pselectina and galectina-3 se cuantificaron en muestras de sangre venosa empleando enzimoinmuno análisis. En los 3 grupos experimentales la densidad ósea se evidenció reducida y los niveles séricos de RANKL elevados respecto al grupo control. Los niveles de OPG en los grupos ERC y GC fueron superiores mientras que en el grupo ERC+GC menores respecto a los animales controles. Galectina 3 plasmática en GC y ERC+GC se encontró reducida y aumentada en los animales ERC, en comparación con los animales controles. La concentración sérica de P-selectina sérica fue mayor en los grupos ERC y ERC+GC, y menor en los animales GC respecto a los niveles plasmáticos de los animales intactos. El avance del conocimiento sobre la regulación de la remodelación ósea a través de la interacción de mediadores sistémicos, en un futuro, puede conducir al desarrollo de nuevas estrategias terapéuticas para la prevención de la osteoporosis en pacientes con enfermedad renal crónica. (AU)
Descritores: Distúrbio Mineral e Ósseo na Doença Renal Crônica/induzido quimicamente
Remodelação Óssea/efeitos dos fármacos
Nefropatias/fisiopatologia
-Osteoporose/prevenção & controle
Doenças Ósseas Metabólicas/diagnóstico
Dexametasona/administração & dosagem
Densidade Óssea/efeitos dos fármacos
Clorofórmio/uso terapêutico
Ratos Wistar
Selectina-P/efeitos dos fármacos
Selectina-P/sangue
Galectina 3/efeitos dos fármacos
Galectina 3/sangue
Ligante RANK/efeitos dos fármacos
Ligante RANK/sangue
Osteoprotegerina/efeitos dos fármacos
Osteoprotegerina/sangue
Glucocorticoides/efeitos adversos
Glicerol/administração & dosagem
Nefropatias/tratamento farmacológico
Limites: Animais
Ratos
Tipo de Publ: Ensaio Clínico Controlado Aleatório Veterinário
Responsável: AR2.1 - Biblioteca Central


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Id: biblio-949374
Autor: Zhang, Zeming; Meng, Zibo; Wang, Yancun.
Título: Correlations of inhaled NO with the cTnI levels and the plasma clotting factor in rabbits with acute massive pulmonary embolism
Fonte: Acta cir. bras;33(8):664-672, Aug. 2018. tab, graf.
Idioma: en.
Resumo: Abstract Purpose: To investigate the correlation of inhaled nitric oxide (NO) on plasma levels of cardiac troponin I (cTnI) and von Willebrand factor (vWF), glycoprotein (GP) IIb/IIIa, granule membrane protein 140 (GMP-140) in rabbits with acute massive pulmonary embolism (PE). Methods: Thirty apanese white rabbits were divided into 3 groups, thrombus were injected in model group (n = 10), NO were inhalated for 24 h after massive PE in NO group (n = 10), saline were injected in control group (n = 10). The concentrations of vWF, GP IIb/IIIa, GMP-140 and cTnI were tested at 4, 8, 12, 16, 20, and 24 h, Correlation analyses were conducted between cTnI and vWF, GP IIb/IIIa, and GMP-140 by Pearson's correlation. Results: The concentration of cTnI and vWF, GP IIb/IIIa, and GMP-140 was increased in the model group, compared to control group. In the inhaled group, the concentrations of cTnI, vWF, GP IIb/IIIa, and GMP-140 were reduced compared to model group. There was a positive correlation between cTnI and vWF, GP IIb/IIIa, and GMP-140. Conclusion: Inhaled nitric oxide can lead to a decrease in levels of cardiac troponin I, von Willebrand factor, glycoprotein, and granule membrane protein 140, after an established myocardial damage, provoked by acute massive pulmonary embolism.
Descritores: Embolia Pulmonar/sangue
Fator de von Willebrand/análise
Complexo Glicoproteico GPIIb-IIIa de Plaquetas/análise
Complexo Glicoproteico GPIIb-IIIa de Plaquetas/efeitos dos fármacos
Selectina-P/sangue
Troponina I/sangue
Óxido Nítrico/administração & dosagem
-Embolia Pulmonar/patologia
Embolia Pulmonar/tratamento farmacológico
Valores de Referência
Fatores de Tempo
Administração por Inalação
Fator de von Willebrand/efeitos dos fármacos
Reprodutibilidade dos Testes
Resultado do Tratamento
Selectina-P/efeitos dos fármacos
Troponina I/efeitos dos fármacos
Modelos Animais de Doenças
Microtomografia por Raio-X
Ventrículos do Coração/patologia
Miocárdio/patologia
Limites: Animais
Coelhos
Responsável: BR1.1 - BIREME


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Id: lil-748486
Autor: Guarda, Ismael Francisco Mota Siqueira.
Título: Estudo dos efeitos do etil-piruvato, salina hipertônica e do Ringer lactato sobre a resposta da microcirculação mesentérica em modelo de sepse induzida por Escherichia coli em ratos / Effects of ethyl-pyruvate, hypertonic saline and lactated Ringer's solution on mesenteric microcirculation in a sepsis model induced by Escherichia coli in rats.
Fonte: São Paulo; s.n; 2014. [84] p. ilus, tab, graf.
Idioma: pt.
Tese: Apresentada a Universidade de São Paulo. Faculdade de Medicina para obtenção do grau de Doutor.
Resumo: INTRODUÇÃO: Estudos recentes em modelos experimentais de sepse demonstraram as propriedades antioxidante e anti-inflamatória do etilpiruvato. Diferentes modelos experimentais também demonstraram que pequenos volumes de solução salina hipertônica (7,5%) melhoram a hemodinâmica, a microcirculação e modulam o sistema imunológico. Este estudo teve como objetivo investigar os efeitos do etil-piruvato, da solução salina hipertônica e da solução de Ringer lactato sobre a microcirculação mesentérica em modelo de sepse induzida por Escherichia coli viva em ratos. MÉTODOS: Ratos Wistar machos receberam por via endovenosa uma suspensão de E. coli ou foram submetidos ao procedimento cirúrgico do grupo falso-operado. Após três horas da infusão bacteriana os animais foram randomizados em: grupo controle não tratado, grupo tratado com solução de Ringer lactato (4mL/kg i.v.); grupo tratado com solução de Ringer lactato (4 mL/kg i.v.) associado a etil-piruvato (50mg/kg) e grupo tratado com solução salina hipertônica (7,5%, 4 mL/kg i.v.). Após 24 horas da bacteremia, as interações leucócito-endotélio foram investigadas por microscopia intravital, e a expressão de P-selectina e da molécula de adesão intercelular (ICAM)-1 determinada por imuno-histoquímica. Leucograma e contagem de plaquetas foram realizadas no início do estudo, 3 horas e 24 horas após a inoculação de E. coli. RESULTADOS: Os grupos não tratado e tratado com solução de Ringer lactato exibiram um aumento no número de leucócitos rollers (~ 2,5 vezes), leucócitos aderidos (~ 3,0 vezes), e de leucócitos migrados (~ 3,5 vezes) comparados ao grupo falso operado. O tratamento com etil-piruvato reduziu o número de leucócitos rollers, aderidos e migrados aos níveis obtidos no grupo falso operado (p > 0,05). Efeitos semelhantes foram observados nos animais tratados com a solução salina hipertônica (p > 0,05). A expressão de P-selectina e de ICAM-1 aumentou significativamente na microcirculação mesentérica no grupo...

BACKGROUND: Experimental studies on sepsis have demonstrated that ethyl pyruvate is endowed with antioxidant and anti-inflammatory properties. It has been shown that small volumes of hypertonic saline solution (7.5%) improve hemodynamics, the microcirculation, and modulate the immune system. This study aimed to investigate the effects of ethyl pyruvate, hypertonic saline and lactated Ringer's solution on mesenteric microcirculation in a sepsis model induced by live Escherichia coli in rats. METHODS: Male Wistar rats were underwent an intravenous suspension of E. coli bacteria or submitted to the sham procedure. After 3h of bacteria infusion rats were randomized into: control, without treatment; treated with lactated Ringer's solution (4 mL/kg, i.v.); treated with lactated Ringer's solution (4mL/kg, i.v.) plus ethyl pyruvate (50mg/kg), and treated with hypertonic saline solution (7.5%, 4 mL/kg i.v.). At 24h after bacteria infusion leukocyte-endothelial interactions were investigated by intravital microscopy, and the expression of P-selectin and intercellular adhesion molecule (ICAM)- 1 evaluated by immunohistochemistry. White blood cell and platelet counts were determined at baseline, 3h and 24h after E. coli inoculation. RESULTS: Both non-treated and lactated Ringer's-treated groups exhibited an increase in the number of rolling leukocytes (~2.5-fold), adherent (~3.0-fold), and migrated cells (~3.5-fold) compared to sham. Treatment with Ringer's ethyl pyruvate solution reduced the number of rolling, adherent and migrated leukocytes to the levels attained in the sham group (p > 0.05). Similar effects were observed when animals were treated with hypertonic saline (p > 0.05). The expression of P-selectin and ICAM-1 significantly increased on mesenteric microvessels in non-treated group compared with sham (p < 0.001). All treatments reduced the expression of both adhesion molecules being ethyl pyruvate and hypertonic saline solution...
Descritores: Escherichia coli
Molécula 1 de Adesão Intercelular
Microcirculação
Selectina-P
Piruvatos
Ratos Wistar
Solução Salina Hipertônica
Sepse
Limites: Animais
Masculino
Ratos
Responsável: BR66.1 - Divisão de Biblioteca e Documentação


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Id: lil-709234
Autor: Zhang, Li-li; Zhao, Zi-gang; Niu, Chun-yu; Zhang, Jing.
Título: Exogenous normal lymph alleviates lipopolysaccharide-induced acute lung injury through lessening the adhesion molecules
Fonte: Acta cir. bras;29(5):287-291, 05/2014. graf.
Idioma: en.
Resumo: PURPOSE: To evaluate the role of exogenous normal lymph (ENL) on lipopolysaccharide (LPS)-induced acute lung injury (ALI) in rats. METHODS: ALI was induced by the jugular vein injection of LPS (iv, 15 mg/kg) in rats of the LPS and LPS+ENL groups within 15 min, then, ENL without cell components (5 ml/kg) was infused at the speed of 0.5 ml per minute in the LPS+ENL group, the same amount of saline was administered in the LPS group. The rats in the sham group received the same surgical procedure and saline. The histomorphology and the levels of P-selectin, intercellular adhesion molecule-1 (ICAM-1), myeloperoxidase (MPO) in pulmonary tissue were assessed. RESULTS: LPS induced pulmonary injury as well as increased the wet/dry weight ratio (W/D) and the levels of P-selectin, ICAM-1, and MPO in pulmonary tissues. These deleterious effects of LPS were significantly ameliorated by ENL treatment. CONCLUSION: Exogenous normal lymph could markedly alleviate the acute lung injury induced by lipopolysaccharide, and its effects might be related to lessening the adhesion molecules. .
Descritores: Lesão Pulmonar Aguda/metabolismo
Molécula 1 de Adesão Intercelular/metabolismo
Linfa/metabolismo
-Lesão Pulmonar Aguda/induzido quimicamente
Lesão Pulmonar Aguda/patologia
Modelos Animais de Doenças
Ensaio de Imunoadsorção Enzimática
Lipopolissacarídeos
Pulmão/metabolismo
Pulmão/patologia
Selectina-P/análise
Peroxidase/análise
Distribuição Aleatória
Ratos Wistar
Fatores de Tempo
Limites: Animais
Masculino
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME


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Id: lil-666013
Autor: International Braz J Urol; Fan, Lian-hui; He, Long; Cao, Zhi-qiang; Xiang, Jun; Liu, Long.
Título: Effect of ischemia preconditioning on renal ischemia/reperfusion injury in rats
Fonte: Int. braz. j. urol;38(6):842-854, Nov-Dec/2012. tab, graf.
Idioma: en.
Resumo: Objective

To study the effect of ischemia preconditioning (IP) on renal ischemia/reperfusion (I/R)-associated functional injury and expression of renal adhesion molecules in rats. Materials and Methods

The ischemia preconditioning plan adopted in this experiment involved renal warm ischemia for 6 min. and blood flow for 4 min., repeated four times. The Wistar rat kidneys used for warm ischemia preconditioning were subjected to 60 min of renal warm ischemia followed by reperfusion. The rat kidneys with ischemia/reperfusion were compared with the ischemia preconditioning group to observe rat renal function and changes in the expression of renal adhesion molecules ICAM-1, P--Selectin, and E-Selectin. Results

The expression of rat renal adhesion molecules (ICAM-1, P-Selectin, and E-Selectin) with ischemia preconditioning was significantly lower than that of the ischemia/reperfusion group. Serum creatinine was significantly lower than that in the ischemia/reperfusion group after 48 hours. Conclusions

Ischemia preconditioning has a protective effect on renal function. Reduced expression of renal adhesion molecules is likely a mechanism involved in the observed protection. .

Descritores: Precondicionamento Isquêmico/métodos
Rim/irrigação sanguínea
Traumatismo por Reperfusão/prevenção & controle
-Moléculas de Adesão Celular/análise
Creatinina/sangue
Modelos Animais de Doenças
Selectina E/análise
Imuno-Histoquímica
Rim/patologia
Selectina-P/análise
Ratos Wistar
Traumatismo por Reperfusão/patologia
Fatores de Tempo
Limites: Animais
Feminino
Masculino
Ratos
Responsável: BR1.1 - BIREME


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Id: lil-620034
Autor: Barreto, Alessandra Costa.
Título: Estudo de marcadores de disfunção endotelial e de inflamação em portadores de hipertensão arterial pulmonar: implicações terapêuticas e prognósticas / Markers of endothelial dysfunction and inflammatory mediators in pulmonary arterial hypertension: therapeutic and prognostic implications.
Fonte: São Paulo; s.n; 2011. 209 p. tab, graf.
Idioma: pt.
Tese: Apresentada a Universidade de São Paulo, Faculdade de Medicina para obtenção do grau de Doutor.
Resumo: A disfunção microvascular, envolvendo células endoteliais, plaquetas e leucócitos, está presente na hipertensão arterial pulmonar (HAP), associando-se a risco aumentado de trombose e menor sobrevida. Estudos sobre disfunção microvascular são escassos em outras formas da doença que não a idiopática. Os objetivos do estudo foram: caracterizar a disfunção microvascular em diferentes formas de HAP através da dosagem de marcadores bioquímicos, avaliando possíveis correlações com índices de gravidade; investigar os efeitos da administração de rosuvastatina em níveis circulantes de marcadores de disfunção microvascular nesses pacientes; e investigar possível associação entre o nível plasmático dos marcadores e prognóstico. Foram incluídos sessenta pacientes: 14 com HAP idiopática ou hereditária, e 46 com HAP associada a cardiopatia congênita (HAPCCg) sem hipoxemia (N=18) ou com hipoxemia (N=28), com idades entre 13 e 60 anos. Foram dosados os níveis plasmáticos circulantes do antígeno do fator de von Willebrand (vWF:Ag), ativador tecidual do plasminogênio (t-PA); inibidor do ativador do plasminogênio (PAI-1), fator de necrose tumoral (TNF-), proteína C reativa (PCR), selectina-P; interleucina-6 (IL-6); e interleucina-10 (IL -10), na condição basal e após 30, 60 e 180 dias de tratamento, por método imunoenzimático. Após randomização, administrouse placebo (N=30) ou dose única oral diária (10mg) de rosuvastatina (N=30), por seis meses. Dados demográficos e funcionais como idade, distância caminhada em seis minutos, saturação periférica de oxigênio em repouso e após esforço, bem como hematócrito, também foram registrados. Pacientes com HAPCCg foram acompanhados por um período de 0,7 a 4,0 anos (mediana de 3,6 anos). Na condição basal, excetuando-se TNF- e PCR, todas as proteínas apresentaram-se significantemente elevadas em relação aos controles (p<0,001), havendo correlação com índices de gravidade clínica. No estudo com rosuvastatina, houve redução significante nos...

Microvascular dysfunction, involving endothelial cells, platelets and leukocytes, is present in pulmonary arterial hypertension (PAH), and is associated to higher risk to thrombotic complications and mortality. Most data about microvascular dysfunction in PAH do not include other forms of the disease beyond idiopathic PAH. The present study was planned to measure plasma levels microvascular dysfunction markers in two different forms of PAH, and investigate possible correlations with indices of severity of the disease; to investigate the effects of chronic rosuvastatin administration versus placebo on the circulating levels of these markers; and to investigate possible associations between levels of these parameters and prognosis. Sixty patients (aged 13 to 60 years) were included, 14 with idiopathic or hereditary PAH, and 46 with congenital heart disease-associated PAH (CHDPAH), in the absence (N=18) or presence (N=28) of hypoxemia. Plasma levels of von Willebrand factor antigen (vWF:Ag), tissue-plasminogen activator (t-PA), plasminogen activator inhibitor-1 (PAI-1), tumor necrosis factor alpha (TNF-), reactive C protein (RCP), P-selectin, interleukin-6 (IL- 6), and interleukin-10 (IL-10) were measured before treatment and 30, 90, and 180 days on treatment using high-sensitivity enzyme-linked immunosorbent assay kits. Patients were randomly assigned to placebo (N=30) or a single oral dose of rosuvastatin (N=30), 10mg/day, for six months. Demographic and functional data such as age, six-minute walk distance, peripheral oxygen saturation at rest and at the end of the six-minute walk, as well as the hematocrit, were recorded. Patients with CHDPAH were followed-up for 0.7 to 4.0 years (median 3.6 years). At baseline, levels of all proteins (except TNF- and RCP) were significantly increased in patients versus controls (p<0,001), and correlated significantly with indices of severity of the disease. P-selectin level was lower in the rosuvastatin group compar...
Descritores: Cardiopatias Congênitas
Inibidores de Hidroximetilglutaril-CoA Redutases
Hipertensão Pulmonar
Selectina-P
Fator de von Willebrand
Limites: Humanos
Masculino
Feminino
Adolescente
Pessoa de Meia-Idade
Responsável: BR66.1 - Divisão de Biblioteca e Documentação
BR66.1; W4.DB8, B26es, FM-2, 2011


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Id: lil-610626
Autor: Simas, Rafael; Sannomiya, Paulina; Cruz, José Walber M. C; Correia, Cristiano de Jesus; Zanoni, Fernando Luiz; Kase, Maurício; Menegat, Laura; Silva, Isaac Azevedo; Moreira, Luiz Felipe P.
Título: Paradoxical effects of brain death and associated trauma on rat mesenteric microcirculation: an intravital microscopic study
Fonte: Clinics;67(1):69-75, 2012. ilus, tab.
Idioma: en.
Resumo: OBJECTIVE: Experimental findings support clinical evidence that brain death impairs the viability of organs for transplantation, triggering hemodynamic, hormonal, and inflammatory responses. However, several of these events could be consequences of brain death-associated trauma. This study investigated microcirculatory alterations and systemic inflammatory markers in brain-dead rats and the influence of the associated trauma. METHOD: Brain death was induced using intracranial balloon inflation; sham-operated rats were trepanned only. After 30 or 180 min, the mesenteric microcirculation was observed using intravital microscopy. The expression of Pselectin and ICAM-1 on the endothelium was evaluated using immunohistochemistry. The serum cytokine, chemokine, and corticosterone levels were quantified using enzyme-linked immunosorbent assays. White blood cell counts were also determined. RESULTS: Brain death resulted in a decrease in the mesenteric perfusion to 30 percent, a 2.6-fold increase in the expression of ICAM-1 and leukocyte migration at the mesentery, a 70 percent reduction in the serum corticosterone level and pronounced leukopenia. Similar increases in the cytokine and chemokine levels were seen in the both the experimental and control animals. CONCLUSION: The data presented in this study suggest that brain death itself induces hypoperfusion in the mesenteric microcirculation that is associated with a pronounced reduction in the endogenous corticosterone level, thereby leading to increased local inflammation and organ dysfunction. These events are paradoxically associated with induced leukopenia after brain damage.
Descritores: Morte Encefálica/fisiopatologia
Corticosterona/sangue
Hemodinâmica/fisiologia
Mediadores da Inflamação/sangue
Circulação Esplâncnica/fisiologia
-Modelos Animais de Doenças
Molécula 1 de Adesão Intercelular/fisiologia
Leucopenia/sangue
Leucopenia/etiologia
Microscopia de Fluorescência
Microcirculação/fisiologia
Selectina-P/fisiologia
Distribuição Aleatória
Ratos Wistar
Limites: Animais
Masculino
Ratos
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME


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Id: lil-554866
Autor: Lindefjeld, Dante; Acevedo, Mónica; Chamorro, Gastón; Mezzano, Diego; Panes, Olga; Aranis, Carolina; Oporto, Jorge.
Título: La atorvastatina no modifica el incremento agudo de los niveles de p-selectina y fibrinógeno inducido con esfuerzo físico máximo / Atovastatin does not modify the acutely increased levels of P-selectin and fibrinogen induced by maximal physical exercise
Fonte: Rev. chil. cardiol;29(1):47-56, 2010. ilus, tab.
Idioma: es.
Projeto: Fondecyt.
Resumo: Introducción: Las estatinas han demostrado disminuir los eventos cardiovasculares en sujetos con y sin enfermedad aterosclerótica establecida. Se ha demostrado, que sus efectos benéficos no sólo dependen de la reducción del colesterol, sino que también podrían ser secundarios a otros efectos de las estatinas, como su efectos de reducción de inflamación y/ o trombogénesis entre otros. Sin embargo, no existen trabajos que demuestren que las estatinas sean capaces de frenarla activación de la cascada de inflamación y/o trombogénesis. Objetivos: Determinar el efecto de la administración oral de atorvastatina por 7 días sobre los niveles plasmáticos de proteína C- reactiva ultrasensible (PCR us), fibrinógeno y P-selectina, pre y post prueba de esfuerzo máximo inmediato y a las 24 horas de su ejecución. Métodos: Ensayo clínico en 50 hombres sanos (18 a 50 años), randomizado atorvastatina 80 mg/día - placebo por 7 días, doble ciego. Muestras tomadas en sangre para PCRus, fibrinógeno y P-selectina, perfil lipídico, creatin kinasa y transaminasas hepáticas, pre y post test de esfuerzo, y a las 24 horas. Los resultados para datos continuos se expresan como medias +/- desviación estándar, test de student para muestras independientes, ANOVA para muestras repetidas. Programa estadístico SPSS 14.0. Resultados: Un grupo de 44 sujetos completaron el estudio: atorvastatina 80 mg (n=24) o placebo (n=20). En el grupo atorvastatina, después de una semana de tratamiento, los niveles de LDLc disminuyeron en 38 por ciento (LDL basal: 97 +/- 27 mg/dL vs LDL post: 62 +/- 31 mg/dL, p < 0.001). Sin embargo, no se observaron cambios en ese mismo período en los niveles de PCRus, fibrinógeno y P-selectina con respecto a placebo. Los niveles de fibrinógeno se elevaron 8 por ciento entre la etapa pre y post ejercicio inmediato (341 +/- 56 mg/dL vs 368 +/- 65 mg/dL, p<0.001), retornando a los niveles basales a las 24 horas; no hubo diferencias entre atorvastatina - placebo...

Background: Chronic statin therapy is known to decrease ínflammation and platelet aggregation. However, little data exist regarding acute effect of statins upon these variables. Exercise can be used to induce ínflammation and platelet aggregation. Aim: to determine the acute effect of atorvastatin upon plasma levels of ultra sensitive C reactive protein (US-PCR), fibrinogen and P selectin before, immediately after and 24 hr following a maximal exercise test in healthy subjects. Methods: This was a double blind, randomized prospective study Fifty healthy male subjects (aged 18to 50years) received atorvastatin 80 mg or placebo daily for 7 days. US-PCR, fibrinogen, P-selectin, blood lipids, total creatin-kinase (CK) and transaminases were determined pre and immediately after maximal treadmill exercise. Repeat determinations were performed 24 following the test. Results were analyzed using the SPSS statistical package, and are expressed as mean +/- SD. Student's t and repeated measures ANOVA were used as appropriate. Results: 44 subjects completed the study (atorvastatin =24; placebo= 20). LDL cholesterol decreased from 97 +/- 27 to 62 +/- 31 mg/dl in the atorvastatin group (p<0.001). US-PCR, After 1 week, Fibrinogen and P-selectin were not significantly modified from baseline, and no differences were observed between groups (atorvastatin vs. control). However, fibrinogen increased 8 percent from baseline to immediately post exercise (341 +/- 6 vs. 368 +/- 65mg/dl (95 percent CI. 21/.3 - 33.6). 24hr after exercise, fibrinogen levels returned to baseline. Similar changes were observed for P-selectin (25 +/- 5, 28 +/- 1.7 ng/dl, baseline and post exercise respectively p<0.01), again returning to baseline 24hr after exercise. No significant changes were observed for US-PCR after exercise in neither group. CK increased 43 percent in the atorvastatin group and 12 percent in controls (NS). Conclusion: Atorvastatin...
Descritores: Ácidos Heptanoicos/administração & dosagem
Exercício Físico/fisiologia
Fibrinogênio
Pirróis/administração & dosagem
Selectina-P
-Método Duplo-Cego
Fibrinogênio/análise
Selectina-P/análise
Fatores de Tempo
Limites: Humanos
Masculino
Adolescente
Adulto
Pessoa de Meia-Idade
Tipo de Publ: Ensaio Clínico Controlado Aleatório
Responsável: CL1.1 - Biblioteca Central


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Id: lil-491924
Autor: Barreto, A. C; Maeda, N. Y; Soares, R. P. S; Cícero, C; Lopes, A. A.
Título: Rosuvastatin and vascular dysfunction markers in pulmonary arterial hypertension: a placebo-controlled study
Fonte: Braz. j. med. biol. res = Rev. bras. pesqui. méd. biol;41(8):657-663, Aug. 2008. ilus, tab.
Idioma: en.
Projeto: FAPESP.
Resumo: We investigated whether chronic rosuvastatin administration could improve the abnormalities of the circulating levels of vascular dysfunction markers in pulmonary arterial hypertension (PAH). Sixty patients, aged 13 to 60 years, with idiopathic (N = 14) or congenital heart disease-associated PAH (N = 46) were equally but randomly assigned to rosuvastatin treatment (10 mg a day, orally) or placebo for 6 months in a blind fashion. Plasma levels of P-selectin, tissue-plasminogen activator and its inhibitor as well as von Willebrand factor antigen were measured by enzyme-linked immunoassay before and after 1, 3, and 6 months of treatment. Baseline levels of biomarkers were elevated (68, 16, 45 and 46 percent increase relative to controls, for P-selectin, von Willebrand factor antigen, tissue-plasminogen activator and its inhibitor, respectively; P < 0.001). P-selectin values at baseline, 1, 3, and 6 months were 39.9 ± 18.5, 37.6 ± 14.6, 34.8 ± 14.6, and 35.4 ± 13.9 ng/mL, respectively, for the rosuvastatin group and 45.7 ± 26.8, 48.0 ± 26.9, 48.1 ± 25.7, and 45.7 ± 25.6 ng/mL for the placebo group. The P-selectin level was lower in the rosuvastatin group compared with placebo throughout treatment (P = 0.037, general linear model). A trend was observed towards a decrease in tissue-plasminogen activator in the statin group (16 percent reduction, P = 0.094), with no significant changes in the other markers. Since P-selectin is crucial in inflammation and thrombosis, its reduction by rosuvastatin is potentially relevant in the pathophysiological scenario of PAH.
Descritores: Endotélio Vascular/fisiopatologia
Fluorbenzenos/uso terapêutico
Inibidores de Hidroximetilglutaril-CoA Redutases/uso terapêutico
Hipertensão Pulmonar/tratamento farmacológico
Pirimidinas/uso terapêutico
Sulfonamidas/uso terapêutico
-Biomarcadores/sangue
Estudos de Casos e Controles
Ensaio de Imunoadsorção Enzimática
Endotélio Vascular/efeitos dos fármacos
Cardiopatias Congênitas/complicações
Hipertensão Pulmonar/sangue
Hipertensão Pulmonar/fisiopatologia
Selectina-P/sangue
Índice de Gravidade de Doença
Ativador de Plasminogênio Tecidual/antagonistas & inibidores
Ativador de Plasminogênio Tecidual/sangue
Adulto Jovem
Fator de von Willebrand/análise
Fator de von Willebrand/imunologia
Limites: Adolescente
Adulto
Feminino
Humanos
Masculino
Pessoa de Meia-Idade
Adulto Jovem
Tipo de Publ: Ensaio Clínico Controlado Aleatório
Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME



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