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CKbeta8-1 alters expression of cyclin E in colony forming units-granulocyte macrophage (CFU-GM) lineage from human cord blood CD34 + cells
Experimental & Molecular Medicine ; : 619-623, 2005.
Article in English | WPRIM | ID: wpr-24112
ABSTRACT
A C6 beta-chemokine, CKbeta8-1, suppressed the colony formation of CD34 + cells of human cord blood (CB). Molecular mechanisms involved in CKbeta8-1-medicated suppression of colony formation of CD34 + cells are not known. To address this issue, the level of various G1/S cell cycle regulating proteins in CKbeta8-1-treated CD34 + cells were compared with those in untreated CD34 + cells. CKbeta8-1 did not significantly alter the expression of the G1/S cycle regulation proteins (cyclin D1, D3, and E), CDK inhibitor (p27and Rb), and other cell proliferation regulation protein (p53) in CB CD34 + cells. Here we describe an in vitro system in which CB CD34 + cells were committed to a multipotent progenitor lineage of colony forming units-granulocyte/macrophage (CFU-GM) by a simple combination of recombinant human (rh) GM-CSF and rhIL-3. In this culture system, we found that cyclin E protein appeared later and disappeared faster in the CKbeta8-1-treated cells than in the control cells during CFU-GM lineage development. These findings suggested that cyclin E may play a role in suppressing the colony formation of CFU-GM by CKbeta8-1.
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Full text: Available Index: WPRIM (Western Pacific) Main subject: Stem Cells / Cells, Cultured / Gene Expression Regulation / G1 Phase / Growth Substances / Cell Cycle Proteins / Cell Lineage / Antigens, CD34 / Cyclin E / Chemokines, CC Limits: Humans Language: English Journal: Experimental & Molecular Medicine Year: 2005 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Stem Cells / Cells, Cultured / Gene Expression Regulation / G1 Phase / Growth Substances / Cell Cycle Proteins / Cell Lineage / Antigens, CD34 / Cyclin E / Chemokines, CC Limits: Humans Language: English Journal: Experimental & Molecular Medicine Year: 2005 Type: Article