Abstract:
:Mechanisms controlling the balance between proliferation and self-renewal versus growth suppression and differentiation during normal and leukemic myelopoiesis are not understood. We have used the bi-potent FDB1 myeloid cell line model, which is responsive to myelopoietic cytokines and activated mutants of the granulocyte macrophage-colony stimulating factor (GM-CSF) receptor, having differential signaling and leukemogenic activity. This model is suited to large-scale gene-profiling, and we have used a factorial time-course design to generate a substantial and powerful data set. Linear modeling was used to identify gene-expression changes associated with continued proliferation, differentiation, or leukemic receptor signaling. We focused on the changing transcription factor profile, defined a set of novel genes with potential to regulate myeloid growth and differentiation, and demonstrated that the FDB1 cell line model is responsive to forced expression of oncogenes identified in this study. We also identified gene-expression changes associated specifically with the leukemic GM-CSF receptor mutant, V449E. Signaling from this receptor mutant down-regulates CCAAT/enhancer-binding protein alpha (C/EBPalpha) target genes and generates changes characteristic of a specific acute myeloid leukemia signature, defined previously by gene-expression profiling and associated with C/EBPalpha mutations.
journal_name
J Leukoc Bioljournal_title
Journal of leukocyte biologyauthors
Brown AL,Wilkinson CR,Waterman SR,Kok CH,Salerno DG,Diakiw SM,Reynolds B,Scott HS,Tsykin A,Glonek GF,Goodall GJ,Solomon PJ,Gonda TJ,D'Andrea RJdoi
10.1189/jlb.0206112subject
Has Abstractpub_date
2006-08-01 00:00:00pages
433-47issue
2eissn
0741-5400issn
1938-3673pii
jlb.0206112journal_volume
80pub_type
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