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Downregulation of B lymphocyte stimulator expression by curcumin in B lymphocyte via suppressing nuclear
Gang Huang1, Yanchun Yang, Zhizhen Xu
1Department of Biochemistry and Molecular Biology, College of Basic Medical Science, Third Military Medical University, Chongqing 400038, China.
Abstract:
Overexpression of B lymphocyte stimulator (BLyS) is closely involved in the pathogenesis and progression of some autoimmune diseases. Curcumin, a pharmacologically safe agent, has been shown to possess potent anti-inflammatory properties. However, it is not clear whether curcumin affects the expression of BLyS. In this study, we report that curcumin inhibits the expression of BLyS and that a DNA-binding site for the transcriptional factor NF-κB in the BLyS promoter region is required for this regulation. Moreover, we find that curcumin reduces the DNA-binding activity of NF-κB to the BLyS promoter region and suppresses nuclear translocation of p65, suggesting that curcumin may suppress BLyS expression via negatively interfering with NF-κB signaling. These results suggest that curcumin may serve as a novel therapeutic agent in the treatment of autoimmune diseases by targeting BLyS.
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