Erschienen in:
01.08.2014
Bufalin, a Bioactive Component of the Chinese Medicine Chansu, Inhibits Inflammation and Invasion of Human Rheumatoid Arthritis Fibroblast-Like Synoviocytes
verfasst von:
Xiaofeng Rong, Weidong Ni, Yongguang Liu, Jun Wen, Chunyan Qian, Linke Sun, Jiajia Wang
Erschienen in:
Inflammation
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Ausgabe 4/2014
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Abstract
Rheumatoid arthritis fibroblast-like synoviocytes (RAFLSs) contribute to the destruction of cartilage and bone by production of metalloproteinases (MMPs) into the synovial fluid and by direct invasion into extracellular matrix (ECM). Bufalin, a major component of Venenum Bufonis, can attenuate the invasion of various cancer cells. Here, we investigated the effects of bufalin on tumor necrosis factor-alpha (TNF-α)-induced invasion of RAFLSs. Western blot analysis and electrophoretic mobility shift assay were conducted to analyze the nuclear translocation of p65/nuclear factor-kappa B (NF-κB) and NF-κB DNA-binding activity. Semiquantitative reverse transcription-polymerase chain reaction and enzyme-linked immunosorbent assay were performed to assess the expression of cytokines. Our results revealed that TNF-α significantly increased p65 translocation into nucleus (P < 0.01) and enhanced NF-κB DNA-binding activity, which were dose-dependently inhibited by bufalin. Furthermore, bufalin attenuated the TNF-α-induced interleukin-1beta (IL-1β), IL-6, and IL-8 production in RAFLSs in a concentration-dependent manner. Interestingly, TNF-α-induced invasion of RAFLSs was dampened by the pretreatment of bufalin. Additionally, bufalin decreased the mRNA abundance and secretion of MMP-9 in TNF-α-treated RAFLSs. Our results reveal that bufalin can inhibit TNF-α-induced NF-κB activation, cytokine production, invasion, and MMP-9 expression in RAFLSs, indicating a therapeutic potential of bufalin on RA.