Influência do meloxicam e da dexametasona no processo inflamatório e no reparo tecidual
Abstract
Foi avaliado a atividade da dexametasona e do meloxicam, antiinflamatórios esteróide e não esteróide, respectivamente, sobre a inflamação e o reparo de tecidos moles em ratos. Para tanto realizou-se uma lesão padronizada no dorso de ratos, que foram sacrificados após dois, cinco, sete e quatorze dias. O material foi analisado através de microscopia de luz utilizando as colorações da hematoxilina e eosina e o sírius vermelho específico para colágeno. A presença de células polimorfonucleares, edema, células mononucleares, reepitelização e colágeno foram as variáveis estudadas. Na avaliação estatística foi utilizada análise de variância através do teste de Kruskal-Wallis com significância ao nível de 5%. Os resultados mostraram que a dexametasona foi mais efetiva na inibição da inflamação, interferindo na síntese de colágeno das lesões cutâneas. Os efeitos do meloxicam preponderaram apenas sobre a inflamação aguda, favorecendo a fibrogênese. A síntese de colágeno foi maior sob a influência do meloxicam, apesar da diferença entre os grupos não ser estatisticamente significativa.
UNITERMOS: inflamação; reparo tecidual; meloxicam; dexametasona.
SUMMARY
This study evaluated the activity of dexamethasone and meloxicam, steroidal and nonsteroidal anti-inflammatory drugs respectively, on the inflammatory process and soft tissue would healing in rats. A standardized lesion was produced in the back of rats, which were then sacrificed two, five, seven and fourteen days subsequently. The material was studied using hematoxylin-eosin and sirius red stains. The presence of polymorphonuclear cells, edema, mononuclear cells, reepithelization and collagen synthesis were the variables under scrutiny. For the statistical assessment, an analysis of variance by the Kruskal-Wallis test was used with the significance level set at 5%. The results showed that the dexamethasone was more effective in inhibiting the inflammation, by interfering with the collagen synthesis in the skin lesions. Meloxicam showed marked effects only on the acute inflammation, by stimulating fibrinogenesis. The collagen synthesis was higher under the influence of meloxicam, although the differences across the groups were not statistically significant.
UNITERMS: inflammation; wound healing; meloxicam; dexamethasone.
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