Autor(es): Morais, Isabel C. O. ; Pereira, Gustavo J. S. ; Orzáez, M. ; Jorge, Roberta J. B. ; Bincoletto, Claudia ; Toyama, Marcos H. [UNESP] ; Monteiro, Helena S. A. ; Smaili, Soraya S. ; Pérez-Payá, Enrique ; Martins, Alice M. C.
Data: 2015
Identificador Persistente: http://hdl.handle.net/11449/131309
Origem: Oasisbr
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Fundação de Amparo à Pesquisa do Estado do Ceará (FUNCAP)
Acute renal failure is a common complication caused by Bothrops viper envenomation. In this study, the nefrotoxicity of a main component of B. leucurus venom called L-aminoacid oxidase (LAAO-Bl) was evaluated by using tubular epithelial cell lines MDCK and HK-2 and perfused kidney from rats. LAAO-Bl exhibited cytotoxicity, inducing apoptosis and necrosis in MDCK and HK-2 cell lines in a concentration-dependent manner. MDCK apoptosis induction was accompanied by Ca2+ release from the endoplasmic reticulum, reactive oxygen species (ROS) generation and mitochondrial dysfunction with enhanced expression of Bax protein levels. LAAO-Bl induced caspase-3 and caspase-7 activation in both cell lines. LAAO-Bl (10 μg/mL) exerts significant effects on the isolated kidney perfusion increasing perfusion pressure and urinary flow and decreasing the glomerular filtration rate and sodium, potassium and chloride tubular transport. Taken together our results suggest that LAAO-Bl is responsible for the nephrotoxicity observed in the envenomation by snakebites. Moreover, the cytotoxic of LAAO-Bl to renal epithelial cells might be responsible, at least in part, for the nephrotoxicity observed in isolated kidney.
Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
Department of Pharmacology, Federal University of São Paulo (UNIFESP), São Paulo, Brazil
Department of Medicinal Chemistry, Centro de Investigación Príncipe Felipe, Valencia, Spain
São Vicente Unit, Paulista Coastal Campus, São Paulo State University (UNESP), São Paulo, Brazil
Department of Clinical and Toxicological Analysis, Federal University of Ceará, Fortaleza, Ceará, Brazil
São Vicente Unit, Paulista Coastal Campus, São Paulo State University (UNESP), São Paulo, Brazil.
FAPESP: 2008/11515-3
FAPESP: 2010/51647-6
