title: Novel method for efficient production of multipotential hematopoietic progenitors from human embryonic stem cells.
abstract: We propose a novel method for the efficient production of hematopoietic progenitors from human embryonic stem cells (hESC) via coculture with murine fetal liver-derived stromal cells, in which embryonic hematopoiesis dramatically expands at midgestation. We generated various hematopoietic progenitors in coculture, and this hematopoietic activity was concentrated in cobblestone-like cells derived from differentiated hESC. The cobblestone-like cells mostly expressed CD34 and retained an endothelial cell potential. They also contained hematopoietic colony-forming cells, especially erythroid and multilineage colony-forming cells at high frequency. The multipotential hematopoietic progenitors abundant among the cobblestone-like cells produced almost all types of mature blood cells, including adult-type alpha-globin-expressing erythrocytes and tryptase/chymase double-positive mast cells. These progenitors showed neither the immature properties of ESC nor the potential to differentiate into endoderm and ectoderm at a clonal level. The coculture system developed for hESC can provide a novel source of hematopoietic and blood cells for applications in cellular therapy and drug screening.
authors.affiliation: Division of Cellular Therapy, Advanced Clinical Research Center, Institute of Medical Science, University of Tokyo, Tokyo, Japan.
authors.forename: Feng
authors.initials: F
authors.lastname: Ma
authors.forename: Dan
authors.initials: D
authors.lastname: Wang
authors.forename: Sachiyo
authors.initials: S
authors.lastname: Hanada
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Ebihara
authors.forename: Hirohide
authors.initials: H
authors.lastname: Kawasaki
authors.forename: Yuji
authors.initials: Y
authors.lastname: Zaike
authors.forename: Toshio
authors.initials: T
authors.lastname: Heike
authors.forename: Tatsutoshi
authors.initials: T
authors.lastname: Nakahata
authors.forename: Kohichiro
authors.initials: K
authors.lastname: Tsuji
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D002455:Cell Division; D002478:Cells, Cultured; D018920:Coculture Techniques / Q000379:methods*; D005260:Female; D006411:Hematopoiesis, Extramedullary; D006412:Hematopoietic Stem Cells / Q000166:cytology*; D006801:Humans; D008099:Liver / Q000166:cytology / Q000196:embryology; D051379:Mice; D008810:Mice, Inbred C57BL; D039902:Multipotent Stem Cells / Q000166:cytology*; D011247:Pregnancy; D017154:Stromal Cells / Q000166:cytology