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A role of both NF-κB pathways in expression and transcription regulation of BAFF-R gene in multiple myeloma cells

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Abstract

B-lymphocyte stimulator (BAFF) is a recently recognized member of the tumor necrosis factor ligand family (TNF) and a potent cell-survival factor expressed in many hematopoietic cells. BAFF regulates B-cell survival, differentiation, and proliferation by binding to three TNF receptors: TACI, BCMA, and BAFF-R. The mechanism involved in BAFF-R gene expression and regulation remains elusive. In this study, we examined BAFF-R gene expression, function, and regulation in multiple myeloma (KM3) cells. It was found that BAFF–BAFF-R induced cell survival by activating NF-κB1 pathway and NF-κB2 pathway. It was also found that NF-κB was an important transcription factor involved in regulating BAFF-R expression through one NF-κB binding site in the BAFF-R promoter, suggesting that inhibiting NF-κB could decrease the expression of BAFF-R mRNA and protein, and promote activity of BAFF-R gene. Our findings indicate that both NF-κB pathways are involved in the regulation of BAFF-R gene and the NF-κB-binding site of BAFF-R may be a new therapeutic target in this disease.

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Acknowledgments

This study was supported by the Key Subject of Jiangsu Province (XK20070302), the Six Major Human Resources Project of Jiangsu Province, and Jiangsu provincial Government Scholarship.

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Correspondence to Shaoqing Ju.

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Shen, X., Zhu, W., Zhang, X. et al. A role of both NF-κB pathways in expression and transcription regulation of BAFF-R gene in multiple myeloma cells. Mol Cell Biochem 357, 21–30 (2011). https://doi.org/10.1007/s11010-011-0871-9

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  • DOI: https://doi.org/10.1007/s11010-011-0871-9

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