Human Gene Set: GRAHAM_NORMAL_QUIESCENT_VS_NORMAL_DIVIDING_UP


Standard name GRAHAM_NORMAL_QUIESCENT_VS_NORMAL_DIVIDING_UP
Systematic name M4406
Brief description Genes up-regulated in quiescent vs dividing CD34+ [GeneID=8842] cells isolated from peripheral blood of normal donors.
Full description or abstract Quiescent and dividing hemopoietic stem cells (HSC) display marked differences in their ability to move between the peripheral circulation and the bone marrow. Specifically, long-term engraftment potential predominantly resides in the quiescent HSC subfraction, and G-CSF mobilization results in the preferential accumulation of quiescent HSC in the periphery. In contrast, stem cells from chronic myeloid leukemia (CML) patients display a constitutive presence in the circulation. To understand the molecular basis for this, we have used microarray technology to analyze the transcriptional differences between dividing and quiescent, normal, and CML-derived CD34+ cells. Our data show a remarkable transcriptional similarity between normal and CML dividing cells, suggesting that the effects of BCR-ABL on the CD34+ cell transcriptome are more limited than previously thought. In addition, we show that quiescent CML cells are more similar to their dividing counterparts than quiescent normal cells are to theirs. We also show these transcriptional differences to be reflected in the altered proliferative activity of normal and CML CD34+ cells. Of the most interest is that the major class of genes that is more abundant in the quiescent cells compared with the dividing cells encodes members of the chemokine family. We propose a role for chemokines expressed by quiescent HSC in the orchestration of CD34+ cell mobilization. Disclosure of potential conflicts of interest is found at the end of this article.
Collection C2: Curated
      CGP: Chemical and Genetic Perturbations
Source publication Pubmed 17717066   Authors: Graham SM,Vass JK,Holyoake TL,Graham GJ
Exact source Table 7S: Ratio NG/ND > 3
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(show 4 gene sets from the same authors)
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Source species Homo sapiens
Contributed by Arthur Liberzon (MSigDB Team)
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AFFY_HG_U133
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Version history 3.0: First introduced

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