Abstract
To investigate the effect of Notch signaling pathways on differentiation of mouse embryonic stem cells(ESC) into haematopoietic stem cells or haematopoietic progenitors cells(HSC/HPC). Mouse embryonic stem cells were proliferated in vitro to form embryoid bodies; the differentiation of embryoid bodies should be induced in vitro, the experiments were divided into BE, control, VEGF, DAPT and VEGF-DAPT groups; HSC/HPC ohenotype: CD117+D34+Sca1+ was detected by flow cytometry; the related gene expression was detected by RT-PCR. The number of VEGF-induced HSC/HPC in VEGF group was significantey higher than that in the control and EB group (P<0.05), suggesting that VEGF promotes ESC differentiation to HSC/HPC; the number of DAPT-induced HSC/HPC in DAPT group was significanty higher than that in the Control and EB groups(P<0.05), suggesting that DAPT promotes ESC differentiation to HSC/HPC; the number of VEGF+DAPT-induced HSC/HPC in VEGF-DAPT group was significantly higher than that in VEGF and DAPT groups(P<0.05), suggesting that DAPT and VEGF play a synergistic role to promote differentiation of ESC into HSC/HPC. Notch signal pathway inhibits differentiation of ESC into HSC / HPC by VEGF.
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