The TLC-Ag dressings, a combination of technology lipido-
colloid and
silver salts, are used to promote healing in
wounds with risks or signs of local
infection, thanks to the antimicrobial properties of the
silver salts. Nanocrystalline
silver dressings containing nanocrystalline
silver, also used to improve wound healing, present both antimicrobial and anti-inflammatory effects. The aim of this study was to investigate the anti-inflammatory effects of TLC-Ag dressings in a model of chronic skin
inflammation induced by repeated application of 12-O-tetradecanoylphorbol-13-acetate to the skin of hairless mice, in comparison with TLC dressing, Silcryst nanocrystalline dressing,
desonide cream 0.05%, a
corticoid cream used as positive control, and gauze. Daily treatments of the mice began 7 days after the start of induction of chronic skin
inflammation and lasted for 7 days. A macroscopic score was performed daily during the treatment period until the mice killing on day 15 and skin samples were taken for histopathological analysis. TLC-Ag reduced significantly the macroscopic score of chronic skin
inflammation from day 10 in comparison with gauze and TLC dressing, similarly to Silcryst nanocrystalline dressing and
desonide cream, which presented the best anti-inflammatory effects. No significant differences were observed between TLC dressing and gauze. TLC-Ag reduced significantly the microscopic score of chronic skin
inflammation in comparison with TLC dressing and gauze, similarly to Silcryst nanocrystalline dressing but significantly less than
desonide cream. These results demonstrate that TLC-Ag dressings present significant anti-inflammatory effects on chronic skin
inflammation. They can improve wound healing, due to both the antimicrobial and anti-inflammatory properties.