Abstract
Objective To investigate the regulation of B-lymphocyte stimulator(BLyS) levels in response to IFN-γand IL-6. Methods Flow cytometry, quantitative polymerase chain reaction, ELISA and Western blot were applied to examine the expression level of BLyS in response to IFN-γ and IL-6 . Results IFN-γand IL-6 induced BLyS expression in KM3 cells. After treated with BAY11-7082, an IkB-α phospho- rylation inhibitor, the up regulation of BI,yS induced by IFN-γ was completely inhibited. Inhibiting the nu-clear faetor-kB (NF-kB) and mitogen activated protein kinase(MAPK) activation in KM3 cells reduced BLyS protein and gene expression. Conclusion MAPK and NF-kB pathways are involved in the regulation of BLyS expression, which suggests that MAPK and NF-kB might be used for the treatment of multiple mye- loma. Key words: Multiple myeloma; B-lymphocyte stimulator; Nuclear faetor-kB; Mitogen activatedprotein kinase
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