IFN-γ对多发性骨髓瘤细胞上B细胞活化因子受体表达的影响及相关机制研究

IFN-γ up-regulated the expression of BAFF-R in multiple myeloma cells through the NF-κB pathway

目的 探讨IFN-γ对多发性骨髓瘤（multiple myeloma,MM）细胞上B细胞活化因子受体（BAFF-R）的表达变化影响及相关机制.方法 应用RT-PCR和ELISA法检测IFN-γ诱导多发性骨髓瘤细胞BAFF-R的表达水平,观察NF-κB特异性抑制剂BAY11-7082对其mRNA和蛋白表达水平的影响;应用Western blot检测NF-κB在IFN-γ诱导的多发性骨髓瘤细胞反应中的活化程度.结果 IFN-γ以时间和剂量依赖方式上调多发性骨髓瘤细胞BAFF-R表达.BAY11-7082以剂量依赖方式在基因转录和翻译水平显著抑制IFN-γ诱导的BAFF-R表达.结论 NF-κB信号通路参与了多发性骨髓瘤细胞BAFF-R的表达,如何参与有待进一步研究.

Objective To investigate the action and mechanism of NF-κB pathway in up-regulating B cell-activating factor receptor （BAFF-R） expression in multiple myeloma cells induced by IFN-γ.Methods Activated NF-κB were detected with Western blot, while the expression of BAFF-R were measured with RT-PCR and ELISA, and investigated the effect of BAY11-7082 on transcription of BAFF-R mRNA and translation of protein in multiple myeloma cells stimulated by IFN-γ. Results IFN-γ can induce the degradation of IκB-α in time-dependent and dosage-dependent manner, and up-regulated BAFF-R expression in multiple myeloma cells. BAY11-7082, an NF-κB inhibitor, inhibited not only the transcription of BAFF-R mRNA but also the protein of regulated by IFN-γin dosage-dependent manner. Conclusion NFκB may play an important role in high expression of BAFF-R in multiple myeloma cells induced by IFN-γ.