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- Title
IL-1β Drives Inflammatory Responses to Propionibacterium acnes In Vitro and In Vivo.
- Authors
Kistowska, Magdalena; Gehrke, Samuel; Jankovic, Dragana; Kerl, Katrin; Fettelschoss, Antonia; Feldmeyer, Laurence; Fenini, Gabriele; Kolios, Antonios; Navarini, Alexander; Ganceviciene, Ruta; Schauber, Jürgen; Contassot, Emmanuel; French, Lars E
- Abstract
Acne vulgaris is potentially a severe skin disease associated with colonization of the pilo-sebaceous unit by the commensal bacterium Propionibacterium acnes and inflammation. P. acnes is considered to contribute to inflammation in acne, but the pathways involved are unclear. Here we reveal a mechanism that regulates inflammatory responses to P. acnes. We show that IL-1β mRNA and the active processed form of IL-1β are abundant in inflammatory acne lesions. Moreover, we identify P. acnes as a trigger of monocyte-macrophage NLRP3-inflammasome activation, IL-1β processing and secretion that is dependent on phagocytosis, lysosomal destabilization, reactive oxygen species, and cellular K+ efflux. In mice, inflammation induced by P. acnes is critically dependent on IL-1β and the NLRP3 inflammasome of myeloid cells. These findings show that the commensal P. acnes-by activating the inflammasome-can trigger an innate immune response in the skin, thus establishing the NLRP3-inflammasome and IL-1β as possible therapeutic targets in acne.
- Subjects
INTERLEUKIN-1; CUTIBACTERIUM acnes; INFLAMMATION; ACNE; SKIN diseases; MESSENGER RNA; MACROPHAGES
- Publication
Journal of Investigative Dermatology, 2014, Vol 134, Issue 3, p677
- ISSN
0022-202X
- Publication type
Article
- DOI
10.1038/jid.2013.438