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Abstract
We found that sterile wounding of human skin induced epidermal expression of the antimicrobial (poly)peptides human β-defensin–3, neutrophil gelatinase–associated lipocalin, and secretory leukocyte protease inhibitor through activation of the epidermal growth factor receptor. After skin wounding, the receptor was activated by heparin-binding epidermal growth factor that was released by a metalloprotease-dependent mechanism. Activation of the epidermal growth factor receptor generated antimicrobial concentrations of human β-defensin–3 and increased the activity of organotypic epidermal cultures against Staphylococcus aureus. These data demonstrate that sterile wounding initiates an innate immune response that increases resistance to overt infection and microbial colonization.
Authors
Ole E. Sørensen, Dharma R. Thapa, K. Markus Roupé, Erika V. Valore, Ulf Sjöbring, Alice A. Roberts, Artur Schmidtchen, Tomas Ganz
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ISSN: 0021-9738 (print), 1558-8238 (online)