An expansion phase precedes terminal erythroid differentiation of hematopoietic progenitor cells from cord blood in vitro and is associated with up-regulation of cyclin E and cyclin-dependent kinase 2

M. S. Dai, C. R. Mantel, Z. B. Xia, Hal Broxmeyer, L. Lu

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Abstract

The dynamics of cell cycle regulation were investigated during in vitro erythroid proliferation and differentiation of CD34+ cord blood cells. An unusual cell cycle profile with a majority of cells in S phase (70.2%) and minority of cells in G1 phase (27.4%) was observed in burst-forming unit-erythrocytes (BFU-E)-derived erythroblasts from a 7-day culture of CD34+ cells stimulated with interleukin 3 (IL-3), granulocyte-macrophage colony-stimulating factor (GM-CSF), Steel factor, and Epo. Terminal erythroid differentiation was accompanied by a rapid increase of G0/G1 phase cells. Expression of cyclin E and cyclin-dependent kinase 2 (cdk2) correlated with the proportion of S phase cells. Cyclin D3 was moderately up-regulated during the proliferation phase, and both cyclin E and D3 were rapidly down-regulated during terminal differentiation. This suggests that the high proliferation potential of erythroblasts is associated with temporal up-regulation of cyclin E and cdk2. (C) 2000 by The American Society of Hematology.

Original languageEnglish
Pages (from-to)3985-3987
Number of pages3
JournalBlood
Volume96
Issue number12
StatePublished - Dec 1 2000

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Cyclin-Dependent Kinase 2
Cyclin E
Hematopoietic Stem Cells
Fetal Blood
Cyclin D3
Blood
Up-Regulation
Cells
Erythroblasts
G1 Phase
S Phase
Cell Cycle
Stem Cell Factor
Interleukin-3
Granulocyte-Macrophage Colony-Stimulating Factor
Cell Cycle Resting Phase
Blood Cells
Cell Culture Techniques
Erythrocytes
In Vitro Techniques

ASJC Scopus subject areas

  • Hematology

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An expansion phase precedes terminal erythroid differentiation of hematopoietic progenitor cells from cord blood in vitro and is associated with up-regulation of cyclin E and cyclin-dependent kinase 2. / Dai, M. S.; Mantel, C. R.; Xia, Z. B.; Broxmeyer, Hal; Lu, L.

In: Blood, Vol. 96, No. 12, 01.12.2000, p. 3985-3987.

Research output: Contribution to journalArticle

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AB - The dynamics of cell cycle regulation were investigated during in vitro erythroid proliferation and differentiation of CD34+ cord blood cells. An unusual cell cycle profile with a majority of cells in S phase (70.2%) and minority of cells in G1 phase (27.4%) was observed in burst-forming unit-erythrocytes (BFU-E)-derived erythroblasts from a 7-day culture of CD34+ cells stimulated with interleukin 3 (IL-3), granulocyte-macrophage colony-stimulating factor (GM-CSF), Steel factor, and Epo. Terminal erythroid differentiation was accompanied by a rapid increase of G0/G1 phase cells. Expression of cyclin E and cyclin-dependent kinase 2 (cdk2) correlated with the proportion of S phase cells. Cyclin D3 was moderately up-regulated during the proliferation phase, and both cyclin E and D3 were rapidly down-regulated during terminal differentiation. This suggests that the high proliferation potential of erythroblasts is associated with temporal up-regulation of cyclin E and cdk2. (C) 2000 by The American Society of Hematology.

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