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Research Article

Modulation Of Sulfur Mustard-induced Inflammation And Gene Expression By Olvanil In The Hairless Mouse Vesicant Model

, , , , , , & show all
Pages 125-136 | Published online: 30 Jun 2003
 

Abstract

Cutaneous exposure to sulfur mustard [bis(2-chloroethyl) sulfide (SM)] produces a delayed inflammatory skin response that is followed by severe dermal injury. Assessment of anti-inflammatory therapies against SM-induced skin injury has mainly relied on qualitative histopathological evaluation. The goal of this study was to identify proinflammatory biomarkers in the hairless mouse vesicant model that could be used as additional indicators of SM-induced skin injury for evaluating anti-inflammatory treatment. SM-induced inflammation was determined at 2, 6, and 24 hr postexposure by changes in edema. Ribonuclease protection assay (RPA) was used to determine changes in gene expression of inflammatory mediators. At 2, 6, and 24 hr postexposure, a time-dependent increase in edema was observed in SM-exposed skin, which was significant at 6 and 24 hr when compared to unexposed controls. Ribonuclease protection assay analysis revealed a two-fold or greater increase in monocyte chemoattractant protein-1 (MCP-1), macrophage inflammatory protein-2 (MIP-2), MIP-1α, tumor necrosis factor-α, and interleukin (IL)-1β following exposure to SM when compared to unexposed controls. A significant time-dependent increase was observed in MCP-1, MIP-1α, and IL-1β over the 24 hr time period. At 24 hr postexposure, skin treated with the anti-inflammatory drug olvanil showed a significant decrease in SM-induced edema. Additionally, mRNA levels of MCP-1, MIP-2, and IL-1β were decreased when compared to skin exposed to SM alone. In this study, we identified molecular biomarkers at the mRNA level, up-regulated in skin exposed to SM, which can be partially suppressed by olvanil. Further characterization of the mRNA and protein expression patterns of proinflammatory biomarkers may enable the use of other classes of anti-inflammatory drugs or therapeutic treatments against SM dermal injury.

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