Abstract
In a previous study, we proposed a new therapy using topical bromelain as a supplement to simple wound-track incision for the debridement of firearm wounds. This enzymatic debridement greatly simplified the management of high-velocity gunshot wounds in a pig model, and bromelain was confirmed to improve wound healing. The purpose of the present study was to investigate the effect of bromelain on the microenvironment of firearm wounds. Sixteen Chinese landrace pigs wounded by high-velocity projectiles were divided randomly into four groups: wound incision (group I), incision + bromelain (group IB), wound excision (group E), and control. Blood perfusion, oxygen partial pressure (pO(2)), and the content of tumor necrosis factor (TNF)-α and transforming growth factor (TGF)-β in wound-track tissue were measured. Wound healing was also noted. The recovery of blood perfusion in tissue and pO(2) in wound tracks was significantly more rapid in group IB and group E than in group I and control. The tissue level of TNF-α was significantly lower in group IB than in group I and control 48 h and 72 h post-wounding, and was lower than in group E 48 h post-wounding. The tissue level of TGF-β in group IB was sustained at a significantly higher l...Continue Reading
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