Extracellular signal–regulated kinase 1/extracellular signal–regulated kinase 2 mitogen-activated protein kinase signaling and activation of activator protein 1 and nuclear factor κB transcription factors play central roles in interleukin-8 expression stimulated by monosodium urate monohydrate and calcium pyrophosphate crystals in monocytic cells

Abstract

These results indicate that ERK-1/ ERK-2 signaling and transcriptional activation through AP-1 and NF-kappaB are essential for the induction of IL-8 expression in mononuclear phagocytes in response to CPPD and MSU crystals.