Estudo da proteção renal durante a isquemia e reperfusão em ratos com o CAPE (caffeic acid phenethyl ester)
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Data
2011-08-19
Autores
Roso, Nilson de Camargos [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
o CAPE, ativo componente da própolis, é um potente antioxidante com importantes ações no estudo da isquemia e reperfusão renal. O objetivo deste estudo é avaliar o efeito do CAPE na lesão renal de isquemia-reperfusão em ratos anestesiados com isoflurano. Utilizou-se 26 ratos Wistar, machos, com peso superior a 250 g, distribuídos de modo aleatório em três grupos de animais, designados: G1 (controle, isquemia; n = 8); G2 (CAPE + isquemia; n = 10); G3 (diluente do CAPE (etanol) + isquemia; n = 8). Todos os grupos receberam indução da anestesia com isoflurano a 4% e a manutenção com isoflurano de 1,5 a 2,0%. A pressão arterial média (PAM) foi medida para controle da anestesia. A injeção intraperitoneal do CAPE (G2) ou do etanol (G3) foi feita 40 minutos antes da isquemia renal esquerda. Nos três grupos a isquemia durou 25 minutos. Todos os animais foram submetidos à nefrectomia direita. Os valores plasmáticos da creatinina foram determinados no início (M1), no final do experimento (M2) e 24 horas após o final do experimento (M3), quando os animais retornaram ao laboratório e foram anestesiados com isoflurano para coleta de amostra sanguínea e nefrectomia esquerda. Para análise histológica foi utilizada uma escala para avaliação da necrose tubular (0 a 5 = lesão máxima). Houve tratamento estatístico para os valores da temperatura dos animais, peso, PAM, da creatinina plasmática e das lesões histológicas, sendo as diferenças consideradas significantes quando p < 0,05. Conforme mediana, 1o e 3o quartis, entre colchetes, segundo o grupo, a creatinina foi maior em M2 do G2 (0,8 [0,6;0,8]) do que M2 do G1 (0,5[0,4;0,6]) e M2 do G3 (0,6[0,6;0,7]) com p = 0,0012. A creatinina também foi maior em M3 do G2 (3,7 [2,6;4,4]) do que M3 do G1 (0,9[0,7;1,4] e M3 do G3 (1,0[0,9;1,6] com p = 0,0014. Os valores...
CAPE, an active component of propolis, exhibits antioxidant properties with important actions on ischemia and reperfusion renal study. The purpose of this investigation was to examine the effect of CAPE in renal ischemia/reperfusion in rats anesthetized with isoflurane. Twenty six rats were randomly assigned in three groups: G1 (control, ischemia; n = 8); G2 (CAPE + ischemia; n = 10); G3 (dilute of CAPE (ethanol) + ischemia; n = 8). All groups were anesthetized with isoflurane. Mean arterial pressure (MAP) was monitored for anesthesia control. Intraperitoneal CAPE (G2) or ethanol (G3) injections were realized 40 minutes before left renal ischemia. All animals underwent to right nephrectomy and left kidney was submitted to ischemia for 25 minutes. Serum creatinine values were determined in the beginning (M1) and at the end of experiment (M2) and 24 hours after the experiment (M3) rats were anesthetized with isoflurane and intracardiac blood sample was collected and the left kidney removed for histological analysis, using a scale for tubular necrosis (0-5= injury maximum). Statistical analysis was applied to the values of temperature, weight, MAP, serum creatinine and histological score injury and statistical differences were considered when p<0,05. There were no difference among the temperature of different groups. The weight of G2 were higher than others groups. The PAM of group G3 was higher in M2 than other groups. Creatinine values in M2 of group G2 were higher than M2 of group G1 and M2 of group G3 (p=0.0012) and were higher than M3 of group G1 and M3 of group G3 (p=0.0014). There was no difference of creatinine values in M1 of the three groups (p=0.054). Histological examination showed that group G2 had more acute tubular necrosis (2.0[2.0;3.0]) than group G1 (2.0[1.0;2.0]) and... (Complete abstract click electronic access below)
CAPE, an active component of propolis, exhibits antioxidant properties with important actions on ischemia and reperfusion renal study. The purpose of this investigation was to examine the effect of CAPE in renal ischemia/reperfusion in rats anesthetized with isoflurane. Twenty six rats were randomly assigned in three groups: G1 (control, ischemia; n = 8); G2 (CAPE + ischemia; n = 10); G3 (dilute of CAPE (ethanol) + ischemia; n = 8). All groups were anesthetized with isoflurane. Mean arterial pressure (MAP) was monitored for anesthesia control. Intraperitoneal CAPE (G2) or ethanol (G3) injections were realized 40 minutes before left renal ischemia. All animals underwent to right nephrectomy and left kidney was submitted to ischemia for 25 minutes. Serum creatinine values were determined in the beginning (M1) and at the end of experiment (M2) and 24 hours after the experiment (M3) rats were anesthetized with isoflurane and intracardiac blood sample was collected and the left kidney removed for histological analysis, using a scale for tubular necrosis (0-5= injury maximum). Statistical analysis was applied to the values of temperature, weight, MAP, serum creatinine and histological score injury and statistical differences were considered when p<0,05. There were no difference among the temperature of different groups. The weight of G2 were higher than others groups. The PAM of group G3 was higher in M2 than other groups. Creatinine values in M2 of group G2 were higher than M2 of group G1 and M2 of group G3 (p=0.0012) and were higher than M3 of group G1 and M3 of group G3 (p=0.0014). There was no difference of creatinine values in M1 of the three groups (p=0.054). Histological examination showed that group G2 had more acute tubular necrosis (2.0[2.0;3.0]) than group G1 (2.0[1.0;2.0]) and... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Rins - Doenças - Estudos experimentais, Insuficiencia renal, Reperfusion renal
Como citar
ROSO, Nilson de Camargos. Estudo da proteção renal durante a isquemia e reperfusão em ratos com o CAPE (caffeic acid phenethyl ester). 2011. 120 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Medicina de Botucatu, 2011.