Abstract
Despite rapid progress in the understanding of systemic lupus erythematosus (SLE), there is still an urgent need for novel and more effective interventions. Curcumin, a natural polyphenol compound, has been shown to be anti-inflammatory in various disorders. In this study, we investigated the potential therapeutic value of curcumin in SLE. Lupus-prone female MRL/lpr mice were treated with curcumin. The development and extent of nephritis were assessed by monitoring proteinuria and by histologic analysis. Serum anti-dsDNA levels were measured by enzyme-linked immunosorbent assay. Kidney samples were analyzed by Western blot. In vitro, mouse podocytes were used for investigation in the presence of mouse anti-dsDNA antibody-positive (anti-dsDNA+) serum. Curcumin treatment dramatically decreased proteinuria and renal inflammation. Serum anti-dsDNA levels and spleen size were also reduced by curcumin. In addition, curcumin reduced NLRP3 inflammasome activation in lupus-prone mice. In vitro, curcumin significantly inhibited anti-dsDNA+ serum induced expression of NLRP3 inflammasome in podocytes. Overall, these data demonstrate the potential use of curcumin in SLE treatment.
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