title: [Bone marrow endothelial cell-conditional medium promotes the generation of hematopoietic colony-forming cells from murine embryonic stem cells].
abstract: OBJECTIVE
  To observe the inductive efficiency of deriving hematopoietic colony-forming cells from murine embryonic stem (mES) cells co-cultured with bone marrow stromal cell-conditional medium (mBMEC-CM).
  
  
  METHODS
  After the day-4 embryoid bodies (4 dEBs) were derived from embryonic stem cell-D3 (ES-D3) cells, the cells of 4 dEBs were induced into hematopoietic colony-forming cells by co-culturing with mBMEC-CM. The numbers of 4 dEB-derived hematopoietic colonies (high proliferation potential-colony formation cells and burst forming unit-erythroid, HPP-CFC and BFU-E) were detected to explore the relation between the implanted 4 dEB-derived cell numbers and the colony numbers of BFU-E and HPP-CFC. The inducing effect of mBMEC-CM was observed according to the doses and days of induction.
  
  
  RESULTS
  The number of 4 dEB-derived cells within 1 x 10(7)-4 x 10(7)/L was positively related to the colony numbers of HPP-CFC and BFU-E (HPP-CFC, r=0.916,P< 0.05; BFU-E, r=0.927, P<0.05). The inducing doses of mBMEC-CM within 0-20% were positively related to the colony numbers of HPP-CFC and BFU-E (HPP-CFC, r=0.909, P<0.05; BFU-E, r=0.927, P<0.01). The colony numbers of HPP-CFC and BFU-E derived from the 4 dEB-derived cells were the highest after 3 days of induction, followed by those of 6 days and 9 days.
  
  
  CONCLUSIONS
  Bone marrow endothelial cell-conditional medium can promote the generation of HPP-CFC and BFU-E from murine embryonic stem cells.
authors.affiliation: Institute of Human Reproductive and Stem Cell Engineering, Central South University, Changsha 410078, China.
authors.forename: Hui-ping
authors.initials: HP
authors.lastname: Zhao
authors.forename: Guang-xiu
authors.initials: GX
authors.lastname: Lu
authors.forename: Qi-ru
authors.initials: QR
authors.lastname: Wang
mesh_terms: D000818:Animals; D001854:Bone Marrow Cells / Q000166:cytology*; D002454:Cell Differentiation; D002478:Cells, Cultured; D018920:Coculture Techniques; D017077:Culture Media, Conditioned; D053595:Embryonic Stem Cells / Q000166:cytology*; D042783:Endothelial Cells / Q000166:cytology*; D006412:Hematopoietic Stem Cells / Q000166:cytology*; D051379:Mice; D017154:Stromal Cells / Q000166:cytology
chemical_list: D017077:Culture Media, Conditioned