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Actions of Crotalus durissus terrificus venom and crotoxin on the isolated rat kidney BJMBR
Monteiro,H.S.A.; Silva,I.M.S.C. da; Martins,A.M.C.; Fonteles,M.C..
Many studies have reported the occurrence of lethal acute renal failure after snakebites. The aim of the present investigation was to determine alterations in renal function produced by Crotalus durissus terrificus venom and crotoxin as well as the histological alterations induced by these venoms. Isolated kidneys from Wistar rats weighing 240 to 280 g were perfused with Krebs-Henseleit solution containing 6 g% of previously dialyzed bovine serum albumin. The effects of Crotalus durissus terrificus venom and crotoxin were studied on glomerular filtration rate (GFR), urinary flow (UF), perfusion pressure (PP) and percentage sodium tubular transport (%TNa+). The infusion of Crotalus durissus terrificus venom (10 µg/ml) and crotoxin (10 µg/ml) increased GFR...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crotalus durissus terrificus venom; Crotoxin; Kidney.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001001000017
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Anti-ophidian activity of Bredemeyera floribunda Willd. (Polygalaceae) root extract on the local effects induced by Bothrops jararacussu venom BJMBR
Alves,N.T.Q.; Ximenes,R.M.; Jorge,R.J.B.; Silveira,J.A.M.; Santos,J.V.A.; Rodrigues,F.A.P.; Costa,P.H.S.; Xavier Jr.,F.A.F.; Evangelista,J.S.A.M.; Havt,A.; Soares,V.C.G.; Toyama,M.H.; Oliveira,A.N.A.; Araújo,R.M.; Alves,R.S.; Monteiro,H.S.A..
Bredemeyera floribunda roots are popularly used to treat snakebites in the semiarid region of Northeast Brazil, and previous studies indicate the anti-ophidian actions of triterpenoid saponins found in its roots. To assess B. floribunda root extract (BFRE) activity against the effects of Bothrops jararacussu venom (BjuV), antiphospholipasic, antiproteolytic, antihemorrhagic, antinecrotic, and anti-edematogenic activities were investigated in mice. Phytochemical analysis revealed the presence of saponins, flavonoids, and sugars, with rutin and saccharose being the major constituents of BFRE. Acute toxicity was determined and BFRE was nontoxic to mice. Phospholipase A2 and proteolytic activities induced by BjuV were inhibited in vitro by BFRE at all...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bredemeyera floribunda; Snakeroot; Snake venom; Rutin; Antihemorrhagic; Anti-edematogenic.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2019000100608
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Effects of microcystin-LR in isolated perfused rat kidney BJMBR
Nobre,A.C.L.; Jorge,M.C.M.; Menezes,D.B.; Fonteles,M.C.; Monteiro,H.S.A..
Microcystin is a hepatotoxic peptide which inhibits protein phosphatase types 1 and 2A. The objective of the present study was to evaluate the physiopathologic effects of microcystin-LR in isolated perfused rat kidney. Adult Wistar rats (N = 5) of both sexes (240-280 g) were utilized. Microcystin-LR (1 µg/ml) was perfused over a period of 120 min, during which samples of urine and perfusate were collected at 10-min intervals to determine the levels of inulin, sodium, potassium and osmolality. We observed a significant increase in urinary flow with a peak effect at 90 min (control (C) = 0.20 ± 0.01 and treated (T) = 0.32 ± 0.01 ml g-1 min-1, P<0.05). At 90 min there was a significant increase in perfusate pressure (C = 129.7 ± 4.81 and T = 175.0 ±...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microcystin-LR; Kidney; Perfused kidney.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000800008
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Thalidomide and pentoxifylline block the renal effects of supernatants of macrophages activated with Crotalus durissus cascavella venom BJMBR
Martins,A.M.C.; Nobre,A.C.L.; Almeida,A.C.; Bezerra,G.; Lima,A.A.M.; Fonteles,M.C.; Monteiro,H.S.A..
Because thalidomide and pentoxifylline inhibit the synthesis and release of tumor necrosis factor-alpha (TNF-alpha), we determined the effect of these drugs on the renal damage induced by supernatants of macrophages activated with Crotalus durissus cascavella venom in order to identify the role of TNF-alpha in the process. Rat peritoneal macrophages were collected with RPMI medium and stimulated in vitro with C.d. cascavella venom (10 µg/ml) in the absence and presence of thalidomide (15 µM) or pentoxifylline (500 µM) for 1 h and washed and kept in culture for 2 h. Supernatant (1 ml) was tested on an isolated perfused rat kidney (N = 6 for each group). The first 30 min of each experiment were used as control. The supernatant was added to the perfusion...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nephrotoxicity; Crotalus durissus cascavella; Pentoxifylline; Thalidomide; Macrophage.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004001000012
Registros recuperados: 4
Primeira ... 1 ... Última
 

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