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Inducing effects of macrophage stimulating protein on the expansion of early hematopoietic progenitor cells in liquid culture / 中华医学杂志(英文版)
Chinese Medical Journal ; (24): 1192-1197, 2007.
Article in English | WPRIM | ID: wpr-240242
Responsible library: WPRO
ABSTRACT
<p><b>BACKGROUND</b>Macrophage stimulating protein (MSP) is produced by human bone marrow endothelial cells. In this study, we sought to observe its effects on inducing the expansion of early hematopoietic progenitor cells which were cultured in a liquid culture system in the presence of the combination of stem cell factor (SCF), interleukin 3 (IL-3), interleukin 6 (IL-6), granulocyte macrophage-colony stimulating factor (GM-CSF), erythropoietin (EPO) (Cys) and MSP or of Cys and bone marrow endothelial cell conditioned medium (EC-CM).</p><p><b>METHODS</b>Human bone marrow CD34(+) cells were separated and cultured in a liquid culture system for 6 days. Granulocyte-macrophage colony forming unit (CFU-GM) and colony forming unit-granulocyte, erythrocyte, macrophage, megakaryocyte (CFU-GEMM) were employed to assay the effects of different treatment on the proliferation of hematopoeitic stem/progenitor cells. The nitroblue tetrazolium (NBT) reductive test and hoechest 33258 staining were employed to reflect the differentiation and apoptosis of the cells respectively.</p><p><b>RESULTS</b>MSP inhibited the proliferation of CFU-GM and CFU-GEMM in semi-solid culture and the inhibitory effect on CFU-GEMM was stronger than on CFU-GM. MSP inhibited the differentiation of early hematopoietic progenitor cells induced by hematopoietic stimulators. Bone marrow (BM) CFU-GEMM was 2.3-fold or 1.7-fold increase or significantly decreased in either Cys + EC-CM, Cys + MSP or Cys compared with 0 hour control in liquid culture system after 6 days.</p><p><b>CONCLUSION</b>MSP, a hematopoietic inhibitor, inhibits the differentiation of early hematopoietic progenitor cells induced by hematopoietic stimulators and makes the early hematopoietic progenitor cells expand in a liquid culture system.</p>
Subject(s)
Full text: Available Index: WPRIM (Western Pacific) Main subject: Pharmacology / Humans / Hematopoietic Stem Cells / Cell Differentiation / Cells, Cultured / Proto-Oncogene Proteins / Hepatocyte Growth Factor / Apoptosis / Antigens, CD34 / Chemokines, CC Language: English Journal: Chinese Medical Journal Year: 2007 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Pharmacology / Humans / Hematopoietic Stem Cells / Cell Differentiation / Cells, Cultured / Proto-Oncogene Proteins / Hepatocyte Growth Factor / Apoptosis / Antigens, CD34 / Chemokines, CC Language: English Journal: Chinese Medical Journal Year: 2007 Type: Article