TY - JOUR A1 - Haferland, Isabel A1 - Wallenwein, Chantal M. A1 - Ickelsheimer, Tanja A1 - Diehl, Sandra A1 - Wacker, Matthias A1 - Schiffmann, Susanne A1 - Bürger, Claudia A1 - Kaufmann, Roland A1 - König, Anke A1 - Pinter, Andreas T1 - Mechanism of anti-inflammatory effects of rifampicin in an ex vivo culture system of hidradenitis suppurativa T2 - Experimental dermatology N2 - Hidradenitis suppurativa (HS) is a chronic inflammatory skin disease of the hair follicles leading to painful lesions, associated with increased levels of pro-inflammatory cytokines. Numerous guidelines recommend antibiotics like clindamycin and rifampicin in combination, as first-line systemic therapy in moderate-to-severe forms of inflammation. HS has been proposed to be mainly an auto-inflammatory disease associated with but not initially provoked by bacteria. Therefore, it has to be assumed that the pro-inflammatory milieu previously observed in HS skin is not solely dampened by the bacteriostatic inhibition of DNA-dependent RNA polymerase. To further clarify the mechanism of anti-inflammatory effects of rifampicin, ex vivo explants of lesional HS from 8 HS patients were treated with rifampicin, and its effect on cytokine production, immune cells as well as the expression of Toll-like receptor 2 (TLR2) were investigated. Analysis of cell culture medium of rifampicin-treated HS explants revealed an anti-inflammatory effect of rifampicin that significantly inhibiting interleukin (IL)-1β, IL-6, IL-8, IL-10 and tumour necrosis factor (TNF)-α production. Immunohistochemistry of the rifampicin-treated explants suggested a tendency for it to reduce the expression of TLR2 while not affecting the number of immune cells. KW - anti-bacterial agents KW - anti-inflammatory agent KW - hidradenitis suppurativa KW - rifampin KW - therapeutics Y1 - 2022 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/75362 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-753627 SN - 1600-0625 N1 - Open access funding enabled and organized by Projekt DEAL. VL - 31 IS - 7 SP - 1005 EP - 1013 PB - Wiley-Blackwell CY - Oxford ER -