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Sebocytes contribute to skin inflammation by promoting the differentiation of T helper 17 cells
Author(s) -
Mattii M.,
Lovászi M.,
Garzorz N.,
Atenhan A.,
Quaranta M.,
Lauffer F.,
Konstantinow A.,
Küpper M.,
Zouboulis C.C.,
Kemeny L.,
Eyerich K.,
SchmidtWeber C.B.,
Törőcsik D.,
Eyerich S.
Publication year - 2018
Publication title -
british journal of dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.304
H-Index - 179
eISSN - 1365-2133
pISSN - 0007-0963
DOI - 10.1111/bjd.15879
Subject(s) - chemotaxis , chemokine , inflammation , immunology , propionibacterium acnes , immune system , biology , proinflammatory cytokine , secretion , interleukin 8 , microbiology and biotechnology , endocrinology , acne , biochemistry , genetics , receptor
Summary Background The main function of sebocytes is considered to be the production of lipids to moisturize the skin. However, it recently became apparent that sebocytes release chemokines and cytokines and respond to proinflammatory stimuli as well as the presence of bacteria. Objectives To analyse the functional communication between human sebocytes and T cells. Methods Immunofluorescence stainings for CD 4 and interleukin ( IL )‐17 were performed on acne sections and healthy skin. Migration assays and T‐cell‐stimulation cultures were performed with supernatants derived from unstimulated or prestimulated SZ 95 sebocytes. Dendritic cells were generated in the presence of SZ 95 supernatant and subsequently used in mixed leucocyte reactions. Results We showed that CD 4 + IL ‐17 + T cells accumulate around the pilosebaceous unit and are in close contact with sebocytes in acne lesions. By using SZ 95 sebocyte supernatant, we demonstrate a chemotactic effect of sebocytes on neutrophils, monocytes and T cells in a CXCL 8‐dependent manner. Furthermore, sebocyte supernatant induces the differentiation of CD 4 + CD 45 RA + naive T cells into T helper (Th)17 cells via the secretion of IL ‐6, transforming growth factor‐β and, most importantly, IL ‐1β. No direct effects of sebocytes on the function of CD 4 + CD 45 RO + memory T cells were detected. Moreover, sebocytes functionally interact with Propionibacterium acnes in the maturation of dendritic cells, leading to antigen‐presenting cells that preferentially prime Th17 cells. Conclusions Our study provides evidence that human sebocytes actively participate in inflammatory processes in the skin by recruiting and communicating with immune cells. This interaction leads to the generation of Th17 cells, which might contribute to the pathogenesis not only of acne vulgaris, but also of several inflammatory skin diseases.