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Vascular endothelial growth factor promotes hematopoietic differentiation from mouse embryonic stem cells / 中国病理生理杂志
Chinese Journal of Pathophysiology ; (12)2000.
Article in Chinese | WPRIM | ID: wpr-528386
ABSTRACT

AIM:

To study the effect of vascular endothelial growth factor(VEGF) on hematopoietic differentiation from mouse embryonic stem cells(ESC) in vitro.

METHODS:

ES-D3 was allowed to grow on mouse fetal fibroblast feeder layer,and then was developed into embryoid bodies(EB).EB cells were transferred into medium supplemented with different concentration of VEGF and VEGF+SCF for 1 week.Six groups,including.VEGF 5 ?g/L,VEGF 10 ?g/L,VEGF 20 ?g/L, VEGF 5 ?g/L+SCF,VEGF 10 ?g/L+SCF and VEGF 20 ?g/L+SCF,were designed.The group of spontaneous differentiation without cytokine(s) was used as control.Hematopoietic transcription factor GATA-2 and early hematopoietic differentiation genes(c-kit and ?-H1) were detected by RT-PCR.The content of CD34~+ cells in each group were measured by flow cytometry.The cells derived from ESC were incubated in semisolid methycellulose cultures.The numbers of total colony-forming units in culture(CFU-C) were counted by reverse microscope.

RESULTS:

ES-D3 grew and formed EB at day 4.VEGF had a stimulatory effect as a single factor on the expression of genes associated with early hematopoietic differentiation(GATA-2,c-kit and ?-H1),the generation of CD34~+ cells and CFU-C in EB.The effects of VEGF+SCF were the most potent in the experimental groups according to the percent of CD34~+ cells and the numbers of hematopoietic colonies.The most highest inducing efficacy was achieved in VEGF 20 ?g/L or VEGF 10 ?g/L combined with SCF.

CONCLUSION:

VEGF promotes the differentiation of ESC into hematopoietic cells in vitro.The strongest effect was achieved when VEGF was combined with SCF.

Full text: Available Index: WPRIM (Western Pacific) Language: Chinese Journal: Chinese Journal of Pathophysiology Year: 2000 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Language: Chinese Journal: Chinese Journal of Pathophysiology Year: 2000 Type: Article