Consulta: creatorFacets:"Martins-Filho,O.A."
Registros recuperados: 11
Data/hora: 05/06/2024 13:57:36

Perfil fenotípico de linfócitos periféricos de bovinos de raças européias
Provedor de dados: 45
Autores: Bittar,J.F.F.; Ribeiro,M.F.B.; Marciano,A.P.V.; Salcedo,J.H.P.; Martins-Filho,O.A.
The phenotypic profile of bovine lymphocytes was evaluated in 18 bovines (Bos taurus) from three different breeds, being nine Holstein, six Hereford, and three Brown Swiss. All animals were free from ticks and hemoparasites, as determined after jugular vein blood sampling. The immunophenotypes of peripheral lymphocytes were evaluated by flow cytometry. Peripheral lymphocytes were exposed to bovine fluorescein-labeled monoclonal antibodies including anti-CD4, anti-CD8, and anti-purified bovine CD21 specificities. After lysing the erythrocytes with a commercial lysing solution (FACS TM ), the lymphocytes were washed, fixed, and evaluated by flow cytometry. Significant differences in the phenotypic profiles of peripheral lymphocytes among all breeds were...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Imunofenotipagem; Citometria de fluxo; Vacina; Babesiose bovina.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352004000100016

Citometria de fluxo no diagnóstico da leishmaniose visceral canina
Provedor de dados: 45
Autores: Carvalho Neta,A.V.; Rocha,R.D.R.; Gontijo,C.M.F.; Reis,A.B.; Martins-Filho,O.A.
Descreve-se a padronização de nova metodologia para detecção de anticorpos antiformas promastigotas fixadas de L. (L.) chagasi, por citometria de fluxo (AAPF-IgG), sua aplicabilidade e desempenho na identificação de casos de leishmaniose visceral canina (LVC). Foram avaliados dois grupos de cães classificados pela reação de imunofluorescência indireta (RIFI), como: não reatores (NR, n=10) e reatores (R, n=50) dos quais foram coletadas amostras de sangue (soro) para realização dos testes laboratoriais. Os resultados relacionados ao estabelecimento, aplicabilidade e desempenho da metodologia AAPF-IgG demonstraram que essa metodologia possibilita a identificação de uma região de reatividade diferencial entre cães NR e R, no soro diluído a 1:2048 e o valor de...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leishmaniose visceral canina; Diagnóstico sorológico; Citometria de fluxo; Leishmania chagasi; Leishmania infantum.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352006000400005

Effect of heat and moisture exchangers on the prevention of ventilator-associated pneumonia in critically ill patients
Provedor de dados: 56
Autores: Auxiliadora-Martins,M.; Menegueti,M.G.; Nicolini,E.A.; Alkmim-Teixeira,G.C.; Bellissimo-Rodrigues,F.; Martins-Filho,O.A.; Basile-Filho,A.
Ventilator-associated pneumonia (VAP) remains one of the major causes of infection in the intensive care unit (ICU) and is associated with the length of hospital stay, duration of mechanical ventilation, and use of broad-spectrum antibiotics. We compared the frequency of VAP 10 months prior to (pre-intervention group) and 13 months after (post-intervention group) initiation of the use of a heat and moisture exchanger (HME) filter. This is a study with prospective before-and-after design performed in the ICU in a tertiary university hospital. Three hundred and fourteen patients were admitted to the ICU under mechanical ventilation, 168 of whom were included in group HH (heated humidifier) and 146 in group HME. The frequency of VAP per 1000 ventilator-days...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heat and moisture exchanger; Ventilator-associated pneumonia; Quality improvement; Nosocomial infection; Critically ill patients.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012001200027

In vitro activity of hypnophilin from Lentinus strigosus: a potential prototype for Chagas disease and leishmaniasis chemotherapy
Provedor de dados: 56
Autores: Souza-Fagundes,E.M.; Cota,B.B.; Rosa,L.H.; Romanha,A.J.; Corrêa-Oliveira,R.; Rosa,C.A.; Zani,C.L.; Teixeira-Carvalho,A.; Martins-Filho,O.A.
Hypnophilin and panepoxydone, terpenoids isolated from Lentinus strigosus, have significant inhibitory activity onTrypanosoma cruzi trypanothione reductase (TR). Although they have similar TR inhibitory activity at 10 μg/mL (40.3 μM and 47.6 μM for hypnophilin and panepoxydone, respectively; ~100%), hypnophilin has a slightly greater inhibitory activity (~71%) on T. cruzi amastigote (AMA) growth in vitro as well as on in vitro phytohemagglutinin (PHA)-induced peripheral blood mononuclear (PBMC) proliferation (~70%) compared to panepoxydone (69% AMA inhibition and 91% PBMC inhibition). Hypnophilin and panepoxydone at 1.25 μg/mL had 67% inhibitory activity onLeishmania (Leishmania) amazonensis amastigote-like (AMA-like) growth in vitro. The panepoxydone...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chagas disease; Leishmaniasis; Chemotherapy; Immunomodulation; Hypnophilin; Lentinus strigosus.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010001100007

Correction Braz J Med Biol Res 2008; 41 (7): 563-570 - 13CO2 recovery fraction in expired air of septic patients under mechanical ventilation
Provedor de dados: 56
Autores: Auxiliadora-Martins,M.; Coletto,F.A.; Martins-Filho,O.A.; Marchini,J.S.; Basile-Filho,A.
Tipo: Info:eu-repo/semantics/article
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009000900016

Trypan blue exclusion assay by flow cytometry
Provedor de dados: 56
Autores: Avelar-Freitas,B.A.; Almeida,V.G.; Pinto,M.C.X.; Mourão,F.A.G.; Massensini,A.R.; Martins-Filho,O.A.; Rocha-Vieira,E.; Brito-Melo,G.E.A.
Dye exclusion tests are used to determine the number of live and dead cells. These assays are based on the principle that intact plasma membranes in live cells exclude specific dyes, whereas dead cells do not. Although widely used, the trypan blue (TB) exclusion assay has limitations. The dye can be incorporated by live cells after a short exposure time, and personal reliability, related to the expertise of the analyst, can affect the results. We propose an alternative assay for evaluating cell viability that combines the TB exclusion test and the high sensitivity of the flow cytometry technique. Previous studies have demonstrated the ability of TB to emit fluorescence when complexed with proteins. According to our results, TB/bovine serum albumin and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trypan blue; Fluorescence; Flow cytometry; Cytotoxicity.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000400307

Cytokines as determinants of resistance and pathology in human Schistosoma mansoni infection
Provedor de dados: 56
Autores: Corrêa-Oliveira,R.; Malaquias,L.C.C.; Falcão,P.L.; Viana,I.R.C.; Bahia-Oliveira,L.M.G.; Silveira,A.M.S.; Fraga,L.A.O.; Prata,A.; Coffman,R.L.; Lambertucci,J.R.; Cunha-Melo,J.R.; Martins-Filho,O.A.; Wilson,R.A.; Gazzinelli,G.
The role of different cytokines in the peripheral blood mononuclear cell (PBMC) proliferative response and in in vitro granuloma formation was evaluated in a cross-sectional study with patients with the different clinical forms and phases of Schistosoma mansoni infection, as well as a group of individuals "naturally" resistant to infection named normal endemic (NE). The blockage of IL-4 and IL-5 using anti-IL-4 and anti-IL-5 antibodies significantly reduced the PBMC proliferative response to soluble egg (SEA) and adult worm (SWAP) antigens in acute (ACT), chronic intestinal (INT) and hepatosplenic (HS) patients. Similar results were obtained in the in vitro granuloma formation. Blockage of IL-10 had no significant effect on either assay using PBMC from ACT...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Schistosoma mansoni human schistosomiasis mansoni cytokines IL-10 IL-4 IFN-&lt; FONT FACE=Symbol&gt; G&lt; /font&gt.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000100024

The role of IFN-gamma and IL-4 in gastric mucosa inflammation associated with Helicobacter heilmannii type 1 infection
Provedor de dados: 56
Autores: Cinque,S.M.S.; Rocha,G.A.; Correa-Oliveira,R.; Soares,T.F.; Moura,S.B.; Rocha,A.M.C.; Nogueira,A.M.M.F.; Cabral,M.M.D.A.; Vieira,L.Q.; Martins-Filho,O.A.; Queiroz,D.M.M.
Although Helicobacter heilmannii infection is less common than H. pylori infection in humans, it is considered to be of medical importance because of its association with gastritis, gastric ulcer, carcinoma, and mucosa-associated lymphoid tissue lymphoma of the stomach. However, there have been no studies evaluating the role of the Th cell response in H. heilmannii gastric infection. We evaluated the participation of pro-inflammatory and anti-inflammatory cytokines, IFN-gamma and IL-4, in H. heilmannii gastric infection in genetically IFN-gamma- or IL-4-deficient mice. The serum IFN-gamma and IL-4 concentrations were determined by ELISA. The gastric polymorphonuclear infiltrate was higher (P = 0.007) in H. heilmannii-positive than in H. heilmannii-negative...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Helicobacter heilmannii; Gastric mucosa inflammation; IFN-gamma-/- mice; IL-4-/- mice.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000200012

Meningoencephalitis caused by a zygomycete fungus (Basidiobolus) associated with septic shock in an immunocompetent patient: 1-year follow-up after treatment
Provedor de dados: 56
Autores: Auxiliadora-Martins,M.; Alkmim-Teixeira,G.C.; Machado-Viana,J.; Nicolini,E.A.; Martins-Filho,O.A.; Bellissimo-Rodrigues,F.; Carlotti Jr.,C.G.; Basile-Filho,A.
Zygomycosis is an infection caused by opportunistic fungi of the Zygomycetes class, specifically those from the Mucorales and Entomophthorales orders. It is an uncommon disease, mainly restricted to immunocompromised patients. We report a case of a 73-year-old male patient with a history of fever (39°C) lasting for 1 day, accompanied by shivering, trembling, and intense asthenia. The patient was admitted to the intensive care unit with complex partial seizures, and submitted to orotracheal intubation and mechanical ventilation under sedation with midazolam. The electroencephalogram showed evidence of non-convulsive status epilepticus. There is no fast specific laboratory test that permits confirmation of invasive fungal disease. Unless the physician...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Zygomycete; Septic shock; Status epilepticus; Meningoencephalitis; ICU setting.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010000800013

13CO2 recovery fraction in expired air of septic patients under mechanical ventilation
Provedor de dados: 56
Autores: Martins,M.A.; Coletto,F.A.; Martins-Filho,O.A.; Marchini,J.S.; Basile-Filho,A.
The continuous intravenous administration of isotopic bicarbonate (NaH13CO2) has been used for the determination of the retention of the 13CO2 fraction or the 13CO2 recovered in expired air. This determination is important for the calculation of substrate oxidation. The aim of the present study was to evaluate, in critically ill patients with sepsis under mechanical ventilation, the 13CO2 recovery fraction in expired air after continuous intravenous infusion of NaH13CO2 (3.8 µmol/kg diluted in 0.9% saline in ddH2O). A prospective study was conducted on 10 patients with septic shock between the second and fifth day of sepsis evolution (APACHE II, 25.9 ± 7.4). Initially, baseline CO2 was collected and indirect calorimetry was also performed. A primer of 5 mL...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Recovery fraction; 13CO2; Stable isotope; Septic shock; Intensive care setting.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000700003

Expression of the chemokine receptor CXCR4 on lymphocytes of leprosy patients
Provedor de dados: 56
Autores: Mendonça,V.A.; Alvim de Melo,G.E.B.; Araújo,M.G.; Borges,V.O.; Costa,R.D.; Martins-Filho,O.A.; Teixeira- Carvalho,A.; Sathler-Avelar,R.; Teixeira,M.M.; Teixeira,A.L.
Leprosy is caused by Mycobacterium leprae, which induces chronic granulomatous infection of the skin and peripheral nerves. The disease ranges from the tuberculoid to the lepromatous forms, depending on the cellular immune response of the host. Chemokines are thought to be involved in the immunopathogenesis of leprosy, but few studies have investigated the expression of chemokine receptors on leukocytes of leprosy patients. In the present study, we evaluated 21 leprosy patients (M/F: 16/5) with a new diagnosis from the Dermatology Outpatient Clinic of the University Hospital, Federal University of Minas Gerais. The control group was composed of 20 healthy members (M/F: 15/5) of the community recruited by means of announcements. The expression of CCR2,...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Leprosy; Chemokine receptors; CXCR4; Leukocytes.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011001200009