Identification of bacterial biofilm and the Staphylococcus aureus derived protease, staphopain, on the skin surface of patients with atopic dermatitis
Atopic dermatitis (AD) is a chronic inflammatory skin disease characterized by an impaired epidermal barrier, dysregulation of innate and adaptive immunity, and a high susceptibility to bacterial colonization and infection. In the present study, bacterial biofilm was visualized by electron microscop...
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sg-ntu-dr.10356-865362020-11-01T05:32:36Z Identification of bacterial biofilm and the Staphylococcus aureus derived protease, staphopain, on the skin surface of patients with atopic dermatitis Sonesson, Andreas Przybyszewska, Kornelia Eriksson, Sigrid Mörgelin, Matthias Kjellström, Sven Davies, Julia Potempa, Jan Schmidtchen, Artur Lee Kong Chian School of Medicine (LKCMedicine) Bacterial infection Skin diseases Atopic dermatitis (AD) is a chronic inflammatory skin disease characterized by an impaired epidermal barrier, dysregulation of innate and adaptive immunity, and a high susceptibility to bacterial colonization and infection. In the present study, bacterial biofilm was visualized by electron microscopy at the surface of AD skin. Correspondingly, Staphylococcus aureus (S. aureus) isolates from lesional skin of patients with AD, produced a substantial amount of biofilm in vitro. S. aureus biofilms showed less susceptibility to killing by the antimicrobial peptide LL-37 when compared with results obtained using planktonic cells. Confocal microscopy analysis showed that LL-37 binds to the S. aureus biofilms. Immuno-gold staining of S. aureus biofilm of AD skin detected the S. aureus derived protease staphopain adjacent to the bacteria. In vitro, staphopain B degraded LL-37 into shorter peptide fragments. Further, LL-37 significantly inhibited S. aureus biofilm formation, but no such effects were observed for the degradation products. The data presented here provide novel information on staphopains present in S. aureus biofilms in vivo, and illustrate the complex interplay between biofilm and LL-37 in skin of AD patients, possibly leading to a disturbed host defense, which facilitates bacterial persistence. Published version 2017-11-24T08:52:52Z 2019-12-06T16:24:13Z 2017-11-24T08:52:52Z 2019-12-06T16:24:13Z 2017 Journal Article Sonesson, A., Przybyszewska, K., Eriksson, S., Mörgelin, M., Kjellström, S., Davies, J., et al. (2017). Identification of bacterial biofilm and the Staphylococcus aureus derived protease, staphopain, on the skin surface of patients with atopic dermatitis. Scientific Reports, 7, 8689-. https://hdl.handle.net/10356/86536 http://hdl.handle.net/10220/44088 10.1038/s41598-017-08046-2 en Scientific Reports © 2017 The Author(s). Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. 12 p. application/pdf |
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Bacterial infection Skin diseases Sonesson, Andreas Przybyszewska, Kornelia Eriksson, Sigrid Mörgelin, Matthias Kjellström, Sven Davies, Julia Potempa, Jan Schmidtchen, Artur Identification of bacterial biofilm and the Staphylococcus aureus derived protease, staphopain, on the skin surface of patients with atopic dermatitis |
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Atopic dermatitis (AD) is a chronic inflammatory skin disease characterized by an impaired epidermal barrier, dysregulation of innate and adaptive immunity, and a high susceptibility to bacterial colonization and infection. In the present study, bacterial biofilm was visualized by electron microscopy at the surface of AD skin. Correspondingly, Staphylococcus aureus (S. aureus) isolates from lesional skin of patients with AD, produced a substantial amount of biofilm in vitro. S. aureus biofilms showed less susceptibility to killing by the antimicrobial peptide LL-37 when compared with results obtained using planktonic cells. Confocal microscopy analysis showed that LL-37 binds to the S. aureus biofilms. Immuno-gold staining of S. aureus biofilm of AD skin detected the S. aureus derived protease staphopain adjacent to the bacteria. In vitro, staphopain B degraded LL-37 into shorter peptide fragments. Further, LL-37 significantly inhibited S. aureus biofilm formation, but no such effects were observed for the degradation products. The data presented here provide novel information on staphopains present in S. aureus biofilms in vivo, and illustrate the complex interplay between biofilm and LL-37 in skin of AD patients, possibly leading to a disturbed host defense, which facilitates bacterial persistence. |
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Lee Kong Chian School of Medicine (LKCMedicine) |
author_facet |
Lee Kong Chian School of Medicine (LKCMedicine) Sonesson, Andreas Przybyszewska, Kornelia Eriksson, Sigrid Mörgelin, Matthias Kjellström, Sven Davies, Julia Potempa, Jan Schmidtchen, Artur |
format |
Article |
author |
Sonesson, Andreas Przybyszewska, Kornelia Eriksson, Sigrid Mörgelin, Matthias Kjellström, Sven Davies, Julia Potempa, Jan Schmidtchen, Artur |
author_sort |
Sonesson, Andreas |
title |
Identification of bacterial biofilm and the Staphylococcus aureus derived protease, staphopain, on the skin surface of patients with atopic dermatitis |
title_short |
Identification of bacterial biofilm and the Staphylococcus aureus derived protease, staphopain, on the skin surface of patients with atopic dermatitis |
title_full |
Identification of bacterial biofilm and the Staphylococcus aureus derived protease, staphopain, on the skin surface of patients with atopic dermatitis |
title_fullStr |
Identification of bacterial biofilm and the Staphylococcus aureus derived protease, staphopain, on the skin surface of patients with atopic dermatitis |
title_full_unstemmed |
Identification of bacterial biofilm and the Staphylococcus aureus derived protease, staphopain, on the skin surface of patients with atopic dermatitis |
title_sort |
identification of bacterial biofilm and the staphylococcus aureus derived protease, staphopain, on the skin surface of patients with atopic dermatitis |
publishDate |
2017 |
url |
https://hdl.handle.net/10356/86536 http://hdl.handle.net/10220/44088 |
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1683494629945638912 |