title: Gene expression accompanied by differentiation of cord blood-derived CD34+ cells to eosinophils.
abstract: To clarify the relation between the expression of genes such as eosinophil-specific granular proteins and cytokine receptors and the pathogenesis of allergic disease, cord blood-derived CD34+ cells were cultured and differentiated into eosinophils. Gene expression in the cells during the differentiation was determined by real-time reverse transcription PCR (ABI PRISM 7700). CD34+ mononuclear cells cultured with stem cell factor, granulocyte-macrophage colony-stimulating factor (GM-CSF), IL-3, and IL-5 in Iscove's MEM, and proliferated until the 2nd week, when the cell number reached a plateau. Under these conditions, more than 90% of the cells differentiate into mature eosinophils in 3 weeks. The expression of major basic protein and eosinophil-derived neurotoxin in the treated cells increased until week 2 and decreased between week 2 and 3. However, the expression of membrane receptor genes, such as IL-5 receptor (alpha chain), IL-3 receptor (alpha chain), GM-CSF-alpha receptor, GM-CSF-beta receptor, CC chemokine receptor 3, interferon-gamma receptor, platelet-activating factor receptor and leukotriene D4 receptor, increased until the 3rd week of eosinophil maturation. Our study suggests that the in vitro eosinophil differentiation and maturation model is useful for clarifying the relation between eosinophil-specific gene expression during allergic diseases and the progression of the disease.
authors.affiliation: Genox Research Inc., National Children's Medical Research Center, Taishido, Setagaya, Tokyo, Japan. hashida@genox.co.jp
authors.forename: R
authors.initials: R
authors.lastname: Hashida
authors.forename: K
authors.initials: K
authors.lastname: Ogawa
authors.forename: M
authors.initials: M
authors.lastname: Miyagawa
authors.forename: Y
authors.initials: Y
authors.lastname: Sugita
authors.forename: K
authors.initials: K
authors.lastname: Matsumoto
authors.forename: A
authors.initials: A
authors.lastname: Akasawa
authors.forename: H
authors.initials: H
authors.lastname: Saito
mesh_terms: D018952:Antigens, CD34 / Q000032:analysis*; D015415:Biomarkers / Q000032:analysis; D001798:Blood Proteins / Q000096:biosynthesis / Q000235:genetics; D002454:Cell Differentiation; D002455:Cell Division; D002478:Cells, Cultured; D047091:Eosinophil Granule Proteins; D047208:Eosinophil-Derived Neurotoxin; D004804:Eosinophils / Q000276:immunology*; D005312:Fetal Blood / Q000166:cytology*; D006412:Hematopoietic Stem Cells / Q000737:chemistry / Q000502:physiology*; D006801:Humans; D007700:Kinetics; D012333:RNA, Messenger / Q000096:biosynthesis; D018121:Receptors, Cytokine / Q000096:biosynthesis / Q000235:genetics; D012260:Ribonucleases / Q000096:biosynthesis / Q000235:genetics; D014158:Transcription, Genetic
chemical_list: D018952:Antigens, CD34; D015415:Biomarkers; D001798:Blood Proteins; D047091:Eosinophil Granule Proteins; D012333:RNA, Messenger; D018121:Receptors, Cytokine; D047208:Eosinophil-Derived Neurotoxin; D012260:Ribonucleases