Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

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Rasmussen, T. et al.

C-MAF oncogene dysregulation in multiple myeloma: frequency and biological relevance.

To investigate the frequency and possible biological consequences of c-maf dysregulation, we designed c-maf and IL-4 real-time RT-PCR assays for determination of c-maf and IL-4 mRNA levels. Using the c-maf real-time RT-PCR assay, we tested a panel of 14 B-cell lines, 135 diagnostic bone marrow (BM) samples from patients with multiple myeloma and 10 BM samples from normal donors. In B cell lines and flowsorted CD38++/CD19-/CD56++ myeloma plasma cells (N = 14) the c-maf/GAPDH and IL-4/GAPDH ratios were determined simultaneously using real time RT-PCR. All B cell lines used in the study were characterized by flow cytometry and tested for the presence of Ebstein-Barr virus (EBV). B-cell lines, that were PCR negative for EBV and had a phenotype typical for primary myeloma cells, expressed medium to high levels of c-maf mRNA. However, all EBV PCR positive cell lines, showed a more immature phenotype, lacked expression of aberrant surface markers and contained very low levels of c-maf mRNA. In 4.4% (6/135) of MM patients tested, a c-maf mRNA level comparable to the cell line RPMI 8226 containing at (16:22), translocation was found. In addition, all c-maf positive myeloma cell lines and CD38++/CD19-/CD56++ myeloma plasma cells tested were IL-4 negative. In conclusion, high levels of c-maf mRNA were observed in "true MM cell lines" and 4.4% of MM patients. Further, c-maf dysregulation in myeloma plasma cells did not cause induction of IL-4 transcription.[1]

References

C-MAF oncogene dysregulation in multiple myeloma: frequency and biological relevance. Rasmussen, T., Knudsen, L.M., Dahl, I.M., Johnsen, H.E. Leuk. Lymphoma (2003) [Pubmed]

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