in order to investigate differences in control mechanisms between embryonic and adult hemopoiesis , we have studied the sensitivity of human embryonic progenitors ( 5-8 weeks postconception ) to either positive ( erythropoietin ( ep ) , granulocyte-macrophage colony-stimulating factor ( gm-csf ) and insulin-like growth factor 1 ( igf-1 ] or negative ( tumor necrosis factor ( tnf ) and interferon-gamma ( ifn-gamma ] in vitro regulators of adult hemopoietic differentiation .
C0079460
granulocyte-macrophage colony-stimulating factor
C0007589
differentiation