Gene Set: TAVOR_CEBPA_TARGETS_DN

Standard name TAVOR_CEBPA_TARGETS_DN
Systematic name M19872
Brief description Genes down-regulated in KCL22 cells (chronic myelogenous leukemia, CML, with BCR-ABL1 [GeneID=613;25] fusion) by expression of CEBPA [GeneID=1050].
Full description or abstract The transcription factor C/EBPalpha plays a critical role in the process of granulocytic differentiation. Recently, mutations that abrogated transcriptional activation of C/EBPalpha were detected in acute myeloid leukemia patient samples. Moreover, the progression of chronic myelogenous leukemia (CML) to blast crisis in patients was correlated with down-modulation of C/EBPalpha. The KCL22 cell line, derived from BCR-ABL+ CML in blast crisis, expressed wild-type C/EBPepsilon protein but not a functional C/EBPalpha, -beta, and -gamma. Restoration of C/EBPalpha expression in KCL22 cells triggered a profound proliferative arrest, a block in the G2/M phase of the cell cycle and a gradual increase in apoptosis. Within 3 days of inducing expression of C/EBPalpha, a remarkable neutrophilic differentiation of the KCL22 blast cells occurred as shown by morphologic changes, induction of expression of CD11b, primary, secondary, and tertiary granule proteins, and granulocyte colony-stimulating factor receptor. Using high density oligonucleotide microarrays, the gene expression profile of KCL22 cells stably transfected with C/EBPalpha was compared with that of empty vector, and we identified genes not previously known to be regulated by C/EBPalpha. These included the up-regulation of those genes important for regulation of hematopoietic stem cell homing, granulocytic differentiation, and cell cycle, whereas down-regulation occurred for genes coding for signaling molecules and transcription factors that are implicated in regulation of proliferation and differentiation of hematopoietic cells. Our study showed that restoration of C/EBPalpha expression in BCR-ABL+ leukemic cells in blast crisis is sufficient for rapid neutrophil differentiation suggesting a potential therapeutic role for ectopic transfer of C/EBPalpha in acute phase of CML.
Collection C2: curated gene sets
      CGP: chemical and genetic perturbations
Source publication Pubmed 14517214   Authors: Tavor S,Park DJ,Gery S,Vuong PT,Gombart AF,Koeffler HP
Exact source Table 2
Related gene sets (show 1 additional gene sets from the source publication)

(show 18 gene sets from the same authors)
External links  
Organism Homo sapiens
Contributed by Kevin Vogelsang (Broad Institute)
Source platform Hu6800
Dataset references  
Download gene set format: grp | text | gmt | gmx | xml
Compute overlaps (show collections to investigate for overlap with this gene set)
Compendia expression profiles Human tissue compendium (Novartis)
NCI-60 cell lines (National Cancer Institute)
Advanced query Further investigate these 30 genes
Gene families Categorize these 30 genes by gene family
Show members (show 33 members mapped to 30 genes)
Version history 3.0: Renamed from TAVOR_CEBP_DN

See MSigDB license terms here. Please note that certain gene sets have special access terms.