“…Acute GA (AGA) was accompanied by acute joint tissue inflammation due to deposition of monosodium urate (MSU) crystals [3], thereby inducing series of symptoms including severe pain, edema, and erythema in the joints [27]. In MSU-induced AGA animal model, an excess accumulation of MSU crystals stimulates neutrophils, monocytes, or fibroblast-like synoviocytes in GA [15]. In monocytes, MSU crystals stimulate the synthesis of a number of inflammatory cytokines such as interleukin (IL)-1β, IL-6, IL-8, and tumor necrosis factor-α (TNF-α).…”