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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Ultraviolet B-Induced Maturation of CD11b-Type Langerin - Dendritic Cells Controls the Expansion of Foxp3 + Regulatory T Cells in the Skin.
Journal of Immunology 2018 January 2
Skin dendritic cells (DCs) are divided into several subsets with distinctive functions. This study shows a previously unappreciated role of dermal CD11b-type Langerin- DCs in maintaining immunological self-tolerance after UVB exposure. After UVB exposure, dermal CD11b-type Langerin- DCs upregulated surface CD86 expression, induced proliferation of Foxp3+ regulatory T (Treg) cells without exogenous Ags, and upregulated a set of genes associated with immunological tolerance. This Treg-expansion activity was significantly hampered by CD80/CD86 blockade in vivo. These results indicate that CD11b-type Langerin- DCs from the UVB-exposed skin are specialized to expand Treg cells in the skin, which suppress autoimmunity.
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