Hemangio-colony forming cells
First Claim
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1. A method, comprising:
- (a) culturing human embryonic stem cells in serum free media in the presence of vascular endothelial growth factor (VEGF) and bone morphogenic protein 4 (BMP-4) in an amount sufficient to induce the differentiation of said embryonic stem cells into embryoid bodies; and
(b) adding at least two first growth factors selected from the group consisting of;
basic fibroblast growth factor (bFGF), vascular endothelial growth factor (VEGF), bone morphogenic protein 4 (BMP-4), stem cell factor (SCF), thrombopoietin (TPO), Flt-3L (FL), HOX protein, and erythropoietin (EPO) to the culture of embryoid bodies(c) disaggregating the embryoid bodies into single cells; and
(d) adding erythropoietin (EPO) to said single cell culture in an amount sufficient to expand CD34−
CD31−
human hemangio-colony forming cells in the culture;
wherein the embryonic stem cells, embryoid bodies, and CD34−
CD31−
hemangio-colony forming cells are continuously grown in serum-free media to generate CD34−
CD31−
human hemangio-colony forming cells wherein the erythropoietin (EPO) is added to the single cell culture in step (d) after 72 hours of initiating of the culturing of step (a), and optionally, added multiple times throughout step (d).
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Abstract
Methods of generating and expanding human hemangio-colony forming cells in vitro and methods of expanding and using such cells are disclosed. The methods permit the production of large numbers of hemangio-colony forming cells as well as derivative cells, such as hematopoietic and endothelial cells. The cells obtained by the methods disclosed may be used for a variety of research, clinical, and therapeutic applications.
34 Citations
15 Claims
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1. A method, comprising:
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(a) culturing human embryonic stem cells in serum free media in the presence of vascular endothelial growth factor (VEGF) and bone morphogenic protein 4 (BMP-4) in an amount sufficient to induce the differentiation of said embryonic stem cells into embryoid bodies; and (b) adding at least two first growth factors selected from the group consisting of;
basic fibroblast growth factor (bFGF), vascular endothelial growth factor (VEGF), bone morphogenic protein 4 (BMP-4), stem cell factor (SCF), thrombopoietin (TPO), Flt-3L (FL), HOX protein, and erythropoietin (EPO) to the culture of embryoid bodies(c) disaggregating the embryoid bodies into single cells; and (d) adding erythropoietin (EPO) to said single cell culture in an amount sufficient to expand CD34−
CD31−
human hemangio-colony forming cells in the culture;wherein the embryonic stem cells, embryoid bodies, and CD34−
CD31−
hemangio-colony forming cells are continuously grown in serum-free media to generate CD34−
CD31−
human hemangio-colony forming cells wherein the erythropoietin (EPO) is added to the single cell culture in step (d) after 72 hours of initiating of the culturing of step (a), and optionally, added multiple times throughout step (d). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification