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Inate elastase inhibitors are known to be putatively involved in the regulation of tisue inflamation by inhibiting polymorphonuclear leukocyte (PMN) derived proteinases. The aim of this study was to evaluate affects of leukocyte elastase suppresion and PMN infiltration on wound healing in mouse by administering the recombinant elastase inhibitor guamerin (rEIG) in two diferent wound models; 1) impaired pin-punctured dorsal mucosa of anterior tongue rEIG that were fed ad libitum and 2) stable linear excisional cutaneous wound, 40 mice, covered with fibrin sealant containing rEIG. The progres of healing was analyzed by histological meth-ods. The tongue wounds treated with rEIG became edematous around the pin-punctured tongue wound, and influx of inflamatory cels and PMN into the underlying stromal tissue were sen rapidly after wounding and peaked between 2-4 days. Whereas the control mice showed almost no wheal formation in the infiltration, and almost complete wound closure in 4 days. In the other model, the liner exci-sional cutaneous wound treated with fibrin sea-lant containing rEIG showed early wound cons-triction, leser degre of inflamatory cells in-flux, and complete repithelialization in 4-5 days, whereas the wound of control mice with the fibrin sealant alone showed contrary delayed repithelialization, greater degre of inflama-tory cell infiltration, and consequencial forma-Taken together, these data sugest paradoxical effects of rEIG on the wound healing where in the wound exposed to infiltrating milieu of mi-croorganisms in the oral cavity, the rEIG aggra-vates the wound healing by interfering with other innate defensive factors and extended greater flux of PMNs to inflamed wound site, while in the wound enclosed by fibrin, the rEIG acelerated wound healing by inhibiting the inflammation-generated proteases and the acute inflamatory reaction.

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