Milk fat globule-EGF 8 (MFGE8) plays important, nonredundant roles in several biological processes, including apoptotic cell clearance, angiogenesis, and adaptive immunity. Several recent studies have reported a potential role for MFGE8 in regulation of the innate immune response; however, the precise mechanisms underlying this role are poorly understood. Here, we show that MFGE8 is an endogenous inhibitor of inflammasome-induced IL-1β production. MFGE8 inhibited necrotic cell–induced and ATP-dependent IL-1β production by macrophages through mediation of integrin β3 and P2X7 receptor interactions in primed cells.
Nicolas Deroide, Xuan Li, Dominique Lerouet, Emily Van Vré, Lauren Baker, James Harrison, Marine Poittevin, Leanne Masters, Lina Nih, Isabelle Margaill, Yoichiro Iwakura, Bernhard Ryffel, Marc Pocard, Alain Tedgui, Nathalie Kubis, Ziad Mallat
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