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TJ Ernst, A Gazdar, J Ritz and MA Shipp
Division of Tumor Immunology, Dana-Farber Cancer Institute, Boston, MA
02215.
Multiple myeloma is a disease characterized by a long, slowly progressive
phase and a final, more aggressive one. Little is known about the mechanism
of transformation of myeloma cells, although the clinical characteristics
of the disease suggest a multi-step process. Recently, a myeloma cell line,
NCI-H929, was isolated from a patient with aggressive preterminal disease
and found to have a rearranged myc allele. This myeloma cell line has been
further characterized in a focus formation assay to determine whether its
unusual growth characteristics were associated with a second activated
transforming gene. We now report that the NCI-H929 myeloma cell line has an
activated rasn allele in addition to a rearranged myc allele. This is the
first identification of an activated transforming gene in a multiple
myeloma cell line; furthermore, the characterization of two independently
activated oncogenes in this B cell malignancy has implications for both the
pathogenesis and evolution of the disease.
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| Copyright © 1988 by American Society of Hematology Online ISSN: 1528-0020 | |||||||||