title: [Monocytic differentiation of bone marrow-derived hematopoietic precursors controlled by mesenchymal stem cell in absence of exogenous hematopoitic growth factors].
abstract: To study the hematopoiesis controlled by mesenchymal stem cell (MSC) in the absence of exogenous hematopoietic growth factors in vitro. MSCs were isolated and cultured in vitro, and the hematopoietic growth factors secreted by MSCs were detected with RT-PCR. Mononuclear cells from bone marrow were seeded in 6-well plates in which MSCs had been seeded as feeder cells. After culture for 3 weeks, cells in coculture were observed with wright's staining, immunocytochemisty and flow cytometry analysis to identify the lineage of hematopoietic cells. The results showed that SCF, Flt3 Ligand and M-CSF were detected in MSCs, but G-CSF and GM-CSF were not detected. In the coculture system, a number of round shape cells grew adherently to the spindle shape MSCs after coculture for 2 weeks. Wright's staining displayed that the round shape cells had abundant plasma and kidney-shaped or oval nucleus, some cells had typical monocytic morphology, and Flow cytometry analysis displayed that the CD45+ round shape cells were positive for CD14 and were negative for CD15, CD7, CD19, CD41 and glycoporin A. Our data suggested that hematopoietic precursors from bone marrow were able to differentiate into monocyte controlled by mesenchymal stem cells in vitro in absence of exogenous hematopoitic growth factors, the committed differentiation might be regulated by the hematopoietic growth factors secreted by MSCs, and the cell-cell contact might also contribute to the differentiation.
authors.affiliation: BMT Center, Department of Hematology, the First Affiliated Hospital, Medical School, Zhejiang University, Hangzhou 310003.
authors.forename: Hong
authors.initials: H
authors.lastname: Cen
authors.forename: Mao Fang
authors.initials: MF
authors.lastname: Lin
authors.forename: He
authors.initials: H
authors.lastname: Huang
authors.forename: Zhen
authors.initials: Z
authors.lastname: Cai
mesh_terms: D001854:Bone Marrow Cells / Q000166:cytology*; D002454:Cell Differentiation; D019070:Cell Lineage; D002478:Cells, Cultured; D018920:Coculture Techniques; D006410:Hematopoiesis; D006412:Hematopoietic Stem Cells / Q000166:cytology* / Q000378:metabolism; D006801:Humans; D017493:Leukocyte Common Antigens / Q000032:analysis; D018950:Lipopolysaccharide Receptors / Q000032:analysis; D016173:Macrophage Colony-Stimulating Factor / Q000378:metabolism; D008565:Membrane Proteins / Q000378:metabolism; D059630:Mesenchymal Stem Cells / Q000378:metabolism / Q000502:physiology*; D009000:Monocytes / Q000166:cytology*; D019089:Stem Cell Factor / Q000378:metabolism
chemical_list: D018950:Lipopolysaccharide Receptors; D008565:Membrane Proteins; D019089:Stem Cell Factor; C084881:flt3 ligand protein; D016173:Macrophage Colony-Stimulating Factor; D017493:Leukocyte Common Antigens