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Blood, 25 June 2009, Vol. 113, No. 26, pp. 6584-6592. Prepublished online as a Blood First Edition Paper on March 25, 2009; DOI 10.1182/blood-2008-06-160838.
HEMATOPOIESIS AND STEM CELLS Derivation of functional mature neutrophils from human embryonic stem cells1 Department of Cell Therapy and Transplantation Medicine, University of Tokyo Hospital, Tokyo; 2 Department of Hematology and Oncology, Graduate School of Medicine, University of Tokyo, Tokyo; 3 Department of Clinical and Experimental Hematology, University of Tsukuba, Ibaraki; 4 Divison of Tissue Engineering, University of Tokyo Hospital, Tokyo; 5 Department of Clinical Hematology, School of Health Sciences, Kyorin University, Tokyo; and 6 The 21st Century COE Program, Graduate School of Medicine, University of Tokyo, Tokyo, Japan Human embryonic stem cells (hESCs) proliferate infinitely and are pluripotent. Only a few reports, however, describe specific and efficient methods to induce hESCs to differentiate into mature blood cells. It is important to determine whether and how these cells, once generated, behave similarly with their in vivo–produced counterparts. We developed a method to induce hESCs to differentiate into mature neutrophils. Embryoid bodies were formed with bone morphogenic protein-4, stem cell factor (SCF), Flt-3 ligand (FL), interleukin-6 (IL-6)/IL-6 receptor fusion protein (FP6), and thrombopoietin (TPO). Cells derived from the embryoid bodies were cultured on a layer of irradiated OP9 cells with a combination of SCF, FL, FP6, IL-3, and TPO, which was later changed to granulocyte–colony-stimulating factor. Morphologically mature neutrophils were obtained in approximately 2 weeks with a purity and efficiency sufficient for functional analyses. The population of predominantly mature neutrophils (hESC-Neu's) showed superoxide production, phagocytosis, bactericidal activity, and chemotaxis similar to peripheral blood neutrophils from healthy subjects, although there were differences in the surface antigen expression patterns, such as decreased CD16 expression and aberrant CD64 and CD14 expression in hESC-Neu's. Thus, this is the first description of a detailed functional analysis of mature hESC-derived neutrophils.
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