Cutaneous innate immune sensing of Toll-like receptor 2-6 ligands suppresses T cell immunity by inducing myeloid-derived suppressor cells.
Details
Serval ID
serval:BIB_514AA3E34FFE
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Cutaneous innate immune sensing of Toll-like receptor 2-6 ligands suppresses T cell immunity by inducing myeloid-derived suppressor cells.
Journal
Immunity
ISSN
1097-4180 (Electronic)
ISSN-L
1074-7613
Publication state
Published
Issued date
20/11/2014
Peer-reviewed
Oui
Volume
41
Number
5
Pages
762-775
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Publication Status: ppublish
Abstract
Skin is constantly exposed to bacteria and antigens, and cutaneous innate immune sensing orchestrates adaptive immune responses. In its absence, skin pathogens can expand, entering deeper tissues and leading to life-threatening infectious diseases. To characterize skin-driven immunity better, we applied living bacteria, defined lipopeptides, and antigens cutaneously. We found suppression of immune responses due to cutaneous infection with Gram-positive S. aureus, which was based on bacterial lipopeptides. Skin exposure to Toll-like receptor (TLR)2-6-binding lipopeptides, but not TLR2-1-binding lipopeptides, potently suppressed immune responses through induction of Gr1(+)CD11b(+) myeloid-derived suppressor cells (MDSCs). Investigating human atopic dermatitis, in which Gram-positive bacteria accumulate, we detected high MDSC amounts in blood and skin. TLR2 activation in skin resident cells triggered interleukin-6 (IL-6), which induced suppressive MDSCs, which are then recruited to the skin suppressing T cell-mediated recall responses such as dermatitis. Thus, cutaneous bacteria can negatively regulate skin-driven immune responses by inducing MDSCs via TLR2-6 activation.
Keywords
Adaptive Immunity/immunology, Animals, Antigens/immunology, CD11b Antigen/biosynthesis, CD4-Positive T-Lymphocytes/immunology, CD8-Positive T-Lymphocytes/immunology, Dermatitis, Atopic/immunology, Dermatitis, Atopic/microbiology, Humans, Interleukin-6/biosynthesis, Lipopeptides/immunology, Lymphocyte Activation/immunology, Mice, Mice, Inbred BALB C, Mice, Knockout, Myeloid Cells/immunology, Myeloid Differentiation Factor 88/biosynthesis, Skin/immunology, Skin/microbiology, Staphylococcal Skin Infections/immunology, Staphylococcus aureus/immunology, Toll-Like Receptor 1/immunology, Toll-Like Receptor 2/genetics, Toll-Like Receptor 2/immunology, Toll-Like Receptor 4/immunology, Toll-Like Receptor 6/immunology
Pubmed
Web of science
Publisher's website
Open Access
Yes
Create date
27/08/2020 13:59
Last modification date
17/05/2022 5:36