Alterações funcionais, histopatologicas e ultraestruturais renais causadas pelo veneno bruto de Bothrops moojeni (Caiçaca) em ratos vistar

AUTOR(ES)
DATA DE PUBLICAÇÃO

1998

RESUMO

Accidents by snakebites are a common event in tropical countries and it is an important public health problem in Brazil. After envenoming by bothropic and crotalic accidents may include acute renal failure, being it considered the main cause of death. Interposed between the interna I and external milieu and responsible for the organism haemostasy, the kidneys and the epithelia constituting the several nephrons constituents, respond to a number of systemic injuries including ophidic envenoming. This study was designed to investigate morphological and functional renal disturbances induced by Bothrops moojeni snake crude venom. After 5, 16 and 48h of endovenous administration of O.4_gIg and 5h after O.2_gIg of the venom, the renal function was assessed by the creatinine and lithium clearance and morphological studies by light microscopy and transmission and scanning electron microscopyes. The physiological and morphological findings after B. moojeni venom in the present study showed an early renal tubule disturbance including acute renal proximal and post-proximal tubular impairment to sodium handling. Additionally, there was a significant impairment in the glomerular filtration rate (GFR) associated with severe morphological disturbances of the renal glomerulus. The functional and morphological findings were observed despite of unchanged mean arterial blood pressure. The decrease of GFR was not related to presence of fibrin deposits into the glomerular capillary loops. In conclusion our results suggest a precocious nephrotoxic action of B. moojeni venom, inducing morphological and functional significative changes in the rat kidney

ASSUNTO(S)

rim veneno ultraestrutura (biologia)

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