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Liver mitochondrial dysfunction and oxidative stress in the pathogenesis of experimental nonalcoholic fatty liver disease BJMBR
Oliveira,C.P.M.S.; Coelho,A.M.M.; Barbeiro,H.V.; Lima,V.M.R.; Soriano,F.; Ribeiro,C.; Molan,N.A.T.; Alves,V.A.F.; Souza,H.P.; Machado,M.C.C.; Carrilho,F.J..
Oxidative stress and hepatic mitochondria play a role in the pathogenesis of nonalcoholic fatty liver disease. The aim of the present study was to evaluate the role of hepatic mitochondrial dysfunction and oxidative stress in the pathogenesis of the disease. Fatty liver was induced in Wistar rats with a choline-deficient diet (CD; N = 7) or a high-fat diet enriched with PUFAs-omega-3 (H; N = 7) for 4 weeks. The control group (N = 7) was fed a standard diet. Liver mitochondrial oxidation and phosphorylation were measured polarographically and oxidative stress was estimated on the basis of malondialdehyde and glutathione concentrations. Moderate macrovacuolar liver steatosis was observed in the CD group and mild liver steatosis was observed in the periportal...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hepatic mitochondrial dysfunction; Oxidative stress; Nonalcoholic fatty liver disease; Choline-deficient diet; High-fat diet.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000200004
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Purine nucleotides reduce superoxide production by nitric oxide synthase in a murine sepsis model BJMBR
Barbeiro,H.V.; Barbeiro,D.F.; Debbas,V.; Souza,H.P.; Laurindo,F.R.; Velasco,I.T.; Soriano,F.G..
Sepsis involves a systemic inflammatory response of multiple endogenous mediators, resulting in many of the injurious and sometimes fatal physiological symptoms of the disease. This systemic activation leads to a compromised vascular response and endothelial dysfunction. Purine nucleotides interact with purinoceptors and initiate a variety of physiological processes that play an important role in maintaining cardiovascular function. The purpose of the present study was to investigate the effects of ATP on vascular function in a lipopolysaccharide (LPS) model of sepsis. LPS induced a significant increase in aortic superoxide production 16 h after injection. Addition of ATP to the organ bath incubation solution reduced superoxide production by the aortas of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: ATP; Endotoxin; Endothelium; Superoxide; Nitric oxide.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009001100009
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Sorafenib prevents liver fibrosis in a non-alcoholic steatohepatitis (NASH) rodent model BJMBR
Stefano,J.T.; Pereira,I.V.A.; Torres,M.M.; Bida,P.M.; Coelho,A.M.M.; Xerfan,M.P.; Cogliati,B.; Barbeiro,D.F.; Mazo,D.F.C.; Kubrusly,M.S.; D'Albuquerque,L.A.C.; Souza,H.P.; Carrilho,F.J.; Oliveira,C.P..
Liver fibrosis occurring as an outcome of non-alcoholic steatohepatitis (NASH) can precede the development of cirrhosis. We investigated the effects of sorafenib in preventing liver fibrosis in a rodent model of NASH. Adult Sprague-Dawley rats were fed a choline-deficient high-fat diet and exposed to diethylnitrosamine for 6 weeks. The NASH group (n=10) received vehicle and the sorafenib group (n=10) received 2.5 mg·kg-1·day-1 by gavage. A control group (n=4) received only standard diet and vehicle. Following treatment, animals were sacrificed and liver tissue was collected for histologic examination, mRNA isolation, and analysis of mitochondrial function. Genes related to fibrosis (MMP9, TIMP1, TIMP2), oxidative stress (HSP60, HSP90, GST), and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: NASH; Fibrosis; Mitochondrial dysfunction; Sorafenib.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000500408
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Treatment of hemorrhagic shock with hypertonic saline solution modulates the inflammatory response to live bacteria in lungs BJMBR
Fernandes,C.I.; Llimona,F.; Godoy,L.C.; Negri,E.M.; Pontieri,V.; Moretti,A.I.; Fernandes,T.R.; Soriano,F.G.; Velasco,I.T.; Souza,H.P..
Shock and resuscitation render patients more susceptible to acute lung injury due to an exacerbated immune response to subsequent inflammatory stimuli. To study the role of innate immunity in this situation, we investigated acute lung injury in an experimental model of ischemia-reperfusion (I-R) followed by an early challenge with live bacteria. Conscious rats (N = 8 in each group) were submitted to controlled hemorrhage and resuscitated with isotonic saline (SS, 0.9% NaCl) or hypertonic saline (HS, 7.5% NaCl) solution, followed by intratracheal or intraperitoneal inoculation of Escherichia coli. After infection, toll-like receptor (TLR) 2 and 4 mRNA expression was monitored by RT-PCR in infected tissues. Plasma levels of tumor necrosis factor α and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Toll-like receptors; Immune system; Pneumonia; Escherichia coli; Neutrophils.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009001000004
Registros recuperados: 4
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