Cetoprofeno e expressão de citocinas TNF-alfa e IL-1 após hemorragia aguda em ratos
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Data
2007-11-22
Autores
Eberle, Andrea Stolf [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
Fármacos antiinflamatórios, inibidores da síntese de prostaglandinas, são muitas vezes administrados imediatamente antes da cirurgia, ou durante a mesma, para tratamento de dor pós-operatória. Se ocorrer hemorragia intraoperatória, o rim estaria sem a ação protetora das prostaglandinas, com possibilidade de pior lesão isquêmica. Entretanto, estudo mostrou menor lesão com o antiinflamatório cetoprofeno nessa situação. Em vista disso, o objetivo deste estudo foi pesquisar a expressão renal de citocinas TNFα e IL-1, em ratos que receberam cetoprofeno antes de serem submetidos à hemorragia aguda sem ressuscitação fluídica, relacionando esta expressão com o resultado histológico. Método. Este trabalho foi desenvolvido com 20 ratos Wistar machos, anestesiados com pentobarbital sódico, 50 mg. kg-1 por via intraperitoneal, e divididos em dois grupos submetidos a sangria de 30% da volemia, realizada em três momentos com tempo de 10 minutos entre eles. No grupo G1, 10 animais permaneceram apenas com infusão venosa contínua de solução de Ringer com lactato para reposição de perdas mínimas. No grupo G2, 10 animais também receberam, por via venosa, cetoprofeno 1,5 mg. kg-1, 60 minutos antes da hemorragia. Os atributos estudados foram: pressão arterial média, temperatura retal, hematócrito, concentrações séricas de TNF-α e IL-1, análise histológica do rim, imunomarcações teciduais renais de TNF-α e IL-1. Resultados. Os animais foram homogêneos quanto ao peso. Em G1, a redução da pressão arterial média foi intensa e em G2 houve redução, porém não significativa. Ambos os grupos já antes da hemorragia apresentaram animais com hipotermia, a qual foi mais intensa em G2. Em G2, o hematócrito foi significativamente maior que em G1. Os valores séricos de TNF-α já estavam elevados quando da hemorragia, em G1 e G2, porém muito mais neste último...
Anti-inflammatory drugs, inhibitors of prostaglandins synthesis, are several times administered immediately before or during surgery for postoperative pain relief. In case of intraoperative hemorrhage, the kidney would lose the protective action of the prostaglandin, with the possibility of a worse ischemic lesion. In this case, however, study has shown a smaller lesion with the use of the antiinflammatory drug ketoprofen. The aim of this study was to research the renal expression of cytokines TNF- and IL-1 in rats which have received ketoprofen before being submitted to acute hemorrhage without fluid resuscitation, connecting this expression with the histological result. Method: This study was developed with 20 male Wistars rats, anesthetized with 50 mg.kg-1 of sodium pentobarbital intraperitoneal, and divided in two groups submitted to a 30% volemia bleeding, performed in three moments with a 10 minutes lapse between them. In the group G1, 10 animals remained only with continuous venous infusion of lactated Ringer solution to replace the minimum loss. In the group G2, 10 animals received 1,5 mg.kg-1 of ketoprofen intravenously as well, 60 minutes before the hemorrhage. The attributes studied were: medium artery blood pressure, rectal temperature, hematocrit, serum concentration of cytokines TNF- and IL-1, histological analysis of the kidney, immunostaining of TNF- and IL-1 in renal tissues. Results: The animals were homogeneous in weight. The group G1 showed an intense reduction of the medium artery blood pressure while the group G2 showed a non significative reduction. The animals in both groups had already presented hypothermia before the hemorrhage, which was more intense in group G2. Also in this group, the hematocrit was considerably larger than in group G1. The serum values of TNF- were already high at the time of first hemorrhage... (Complete abstract click electronic access below)
Anti-inflammatory drugs, inhibitors of prostaglandins synthesis, are several times administered immediately before or during surgery for postoperative pain relief. In case of intraoperative hemorrhage, the kidney would lose the protective action of the prostaglandin, with the possibility of a worse ischemic lesion. In this case, however, study has shown a smaller lesion with the use of the antiinflammatory drug ketoprofen. The aim of this study was to research the renal expression of cytokines TNF- and IL-1 in rats which have received ketoprofen before being submitted to acute hemorrhage without fluid resuscitation, connecting this expression with the histological result. Method: This study was developed with 20 male Wistars rats, anesthetized with 50 mg.kg-1 of sodium pentobarbital intraperitoneal, and divided in two groups submitted to a 30% volemia bleeding, performed in three moments with a 10 minutes lapse between them. In the group G1, 10 animals remained only with continuous venous infusion of lactated Ringer solution to replace the minimum loss. In the group G2, 10 animals received 1,5 mg.kg-1 of ketoprofen intravenously as well, 60 minutes before the hemorrhage. The attributes studied were: medium artery blood pressure, rectal temperature, hematocrit, serum concentration of cytokines TNF- and IL-1, histological analysis of the kidney, immunostaining of TNF- and IL-1 in renal tissues. Results: The animals were homogeneous in weight. The group G1 showed an intense reduction of the medium artery blood pressure while the group G2 showed a non significative reduction. The animals in both groups had already presented hypothermia before the hemorrhage, which was more intense in group G2. Also in this group, the hematocrit was considerably larger than in group G1. The serum values of TNF- were already high at the time of first hemorrhage... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Rins - Cirurgia - Aspectos farmacológicos, Agentes anti-inflamatorios, Anestesia, Anti-inflammatory drugs
Como citar
EBERLE, Andrea Stolf. Cetoprofeno e expressão de citocinas TNF-alfa e IL-1 após hemorragia aguda em ratos. 2007. 70 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Medicina de Botucatu, 2007.