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Contribution of plasma cells and B cells to hidradenitis suppurativa pathogenesis
Gudjonsson, Johann E and Tsoi, Lam C and Ma, Feiyang and Billi, Allison C and van Straalen, Kelsey R and Vossen, Allard RJV and van der Zee, HH and Harms, Paul W and Wasikowski, Rachael and Yee, Christine M and others
Hidradenitis suppurativa (HS) is a debilitating chronic inflammatory skin disease characterized by chronic abscess formation and development of multiple draining sinus tracts in the groin, axillae, and perineum. Using proteomic and transcriptomic approaches, we characterized the inflammatory responses in HS in depth, revealing immune responses centered on IFN-γ, IL-36, and TNF, with lesser contribution from IL-17A. We further identified B cells and plasma cells, with associated increases in immunoglobulin production and complement activation, as pivotal players in HS pathogenesis, with Bruton’s tyrosine kinase (BTK) and spleen tyrosine kinase (SYK) pathway activation as a central signal transduction network in HS. These data provide preclinical evidence to accelerate the path toward clinical trials targeting BTK and SYK signaling in moderate-to-severe HS.