Differentiation of pluripotent cells
First Claim
1. A method of differentiating pluripotent cells into hematopoietic precursor cells (HPCs) or endothelial cells comprising the sequential steps of:
- (a) culturing or maintaining a plurality of substantially undifferentiated pluripotent cells in a first defined media comprising at least one growth factor, wherein said cells are cultured or maintained in said media on a matrix-coated surface;
(b) culturing individualized pluripotent cells from step a) under aggregate forming conditions in a second defined, feeder-free media comprising a ROCK inhibitor, for a period of time sufficient to form cell aggregates;
(c) culturing the cell aggregates of step (b) in a third defined media comprising an amount of BMP4, VEGF, and FGF-2 or an FGF-2 mimic, for a period of time sufficient to expand or promote differentiation of cells to a mesodermal lineage;
(d) culturing the cells of step (c) in a fourth defined media comprising an amount of IL-3 and Flt3 ligand, for a period of time sufficient to further expand or promote differentiation of the cells to HPCs and endothelial cells;
(e) optionally, where a further enrichment of endothelial cells is desired, the fourth defined media of step (d) further includes VEGF and FGF; and
wherein a plurality of the pluripotent cells are differentiated into hematopoietic precursor cells or endothelial cells, defined as cells that express CD34 and CD3.
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Abstract
Provided herein are methods for the in vitro maintenance, expansion, culture, and/or differentiation of pluripotent cells, such as human embryonic stem cells (hESC) or induced pluripotent cells (iPSC), into hematopoietic precursor cells or endothelial cells. The pluripotent cells may be maintained and differentiated under defined conditions; thus, the use of mouse feeder cells or serum is not required in certain embodiments for the differentiation of the pluripotent cells into hematopoietic precursor cells or endothelial cells. The resulting hematopoietic precursor cells may be further differentiated into various myeloid or lymphoid lineages.
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Citations
48 Claims
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1. A method of differentiating pluripotent cells into hematopoietic precursor cells (HPCs) or endothelial cells comprising the sequential steps of:
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(a) culturing or maintaining a plurality of substantially undifferentiated pluripotent cells in a first defined media comprising at least one growth factor, wherein said cells are cultured or maintained in said media on a matrix-coated surface; (b) culturing individualized pluripotent cells from step a) under aggregate forming conditions in a second defined, feeder-free media comprising a ROCK inhibitor, for a period of time sufficient to form cell aggregates; (c) culturing the cell aggregates of step (b) in a third defined media comprising an amount of BMP4, VEGF, and FGF-2 or an FGF-2 mimic, for a period of time sufficient to expand or promote differentiation of cells to a mesodermal lineage; (d) culturing the cells of step (c) in a fourth defined media comprising an amount of IL-3 and Flt3 ligand, for a period of time sufficient to further expand or promote differentiation of the cells to HPCs and endothelial cells; (e) optionally, where a further enrichment of endothelial cells is desired, the fourth defined media of step (d) further includes VEGF and FGF; and wherein a plurality of the pluripotent cells are differentiated into hematopoietic precursor cells or endothelial cells, defined as cells that express CD34 and CD3. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification