Effects of Berberine on NLRP3 and IL-1βExpressions in Monocytic THP-1 Cells with Monosodium Urate Crystals-Induced Inflammation
Background.Urate crystals-induced inflammation is a critical factor during the initiation of gouty arthritis. Berberine is well known for its anti-inflammatory activity. However, the underlying effects of berberine on monosodium urate crystals-induced inflammation remain obscure.Objectives.This study is set to explore the protective effect and mechanism of berberine on monosodium urate crystals-induced inflammation in human monocytic THP-1 cells.Methods.The mRNA levels of NLRP3 and IL-1βwere measured by Real-Time PCR, and the protein levels of NLRP3 and IL-1βwere determined by ELISA, Western blot, and immunofluorescence.Results.The NLRP3 and IL-1βexpressions were significantly increased in model group compared to that in normal group (P<0.05). Meanwhile, there was significant reduction in the expressions of NLRP3 and IL-1βmRNA in groups 6.25 μM berberine and 25 μM berberine when compared with model group (P<0.05).Conclusions.Therefore, berberine alleviates monosodium urate crystals-induced inflammation by downregulating NLRP3 and IL-1βexpressions. The regulatory effects of berberine may be related to the inactivation of NLRP3 inflammasome.