Abstract
Recent evidence suggests the existence of progenitor cells in adult tissues that are capable of differentiating into vascular structures as well as into all hematopoietic cell lineages. Here we describe an efficient and reproducible method for generating large numbers of these bipotential progenitors—known as hemangioblasts—from human embryonic stem (hES) cells using an in vitro differentiation system. Blast cells expressed gene signatures characteristic of hemangioblasts, and could be expanded, cryopreserved and differentiated into multiple hematopoietic lineages as well as into endothelial cells. When we injected these cells into rats with diabetes or into mice with ischemia-reperfusion injury of the retina, they localized to the site of injury in the damaged vasculature and appeared to participate in repair. Injection of the cells also reduced the mortality rate after myocardial infarction and restored blood flow in hind limb ischemia in mouse models. Our data suggest that hES-derived blast cells (hES-BCs) could be important in vascular repair.
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Acknowledgements
We thank Y. Ivanova, S. Becker, T.Li, C. Luo, I. Klimanskaya (Advanced Cell Technology) and N. Sengupta (University of Florida) for their excellent technical assistance; The Juvenile Diabetes Research Foundation International; NIH grants EY012601; EY007739; EY14818 (to M.B.G.).
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S.J.L., Q.F. and R.L. are employees of Advanced Cell Technology (ACT), a stem cell company in the field of regenerative medicine; M.A.S.M. is on ACT's Scientific Advisory Board.
Supplementary information
Supplementary Fig. 1
Characterization of hES-BC cells derived from hES cells (PDF 166 kb)
Supplementary Fig. 2
Hematopoietic CFUs derived from hES-BC cells (PDF 126 kb)
Supplementary Fig. 3
FACS analysis of hematopoietic cells of pooled CFUs derived from hES-BC cells (PDF 158 kb)
Supplementary Fig. 4
Endothelial cells derived from hES-BC cells (PDF 119 kb)
Supplementary Fig. 5
PCR analysis of GFP sequences in GFP+ and GFP− hES-BCs derived from plating mixtures of WA01-GFP+ and MA01-GFP− cells (PDF 121 kb)
Supplementary Table 1
Efficiency of hES BC cells derived from different hES cell lines (PDF 60 kb)
Supplementary Protocol
Protocol for culturing, differentiating and expanding hES-BC cells. (PDF 94 kb)
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Lu, SJ., Feng, Q., Caballero, S. et al. Generation of functional hemangioblasts from human embryonic stem cells. Nat Methods 4, 501–509 (2007). https://doi.org/10.1038/nmeth1041
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DOI: https://doi.org/10.1038/nmeth1041
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