Method of deriving progenitor cell line
First Claim
1. A method of deriving a human mesenchymal progenitor cell line from a parental human embryonic stem cell, wherein the mesenchymal progenitor cell line comprises mesenchymal stem cells, the method comprising:
- (a) providing the parental embryonic stem cell or descendents of the parental embryonic stem cell obtained by dispersing an embryonic stem cell colony with trypsin, wherein the parental embryonic stem cell is a human embryonic stem cell; and
(b) culturing the parental embryonic stem cell in the absence of feeder cells in rich media comprising (i) essential nutrients required for cell growth and (ii) serum or serum replacement, wherein the rich media does not comprise additional grown regulators of hormones that promote growth of embryonic stem cells, and wherein the culturing produces mesenchymal progenitor cells which self-renew;
thereby establishing in the absence of transformation a mesenchymal progenitor cell line from the mesenchymal progenitor cells which self-renew;
wherein the mesenchymal progenitor cell line is maintainable in cell culture for more than 20 generations, and wherein the mesenchymal progenitor cell line is lineage restricted compared to the parental embryonic stem cell.
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Abstract
We disclose a method comprising: (a) providing an embryonic stem (ES) cell; and (b) establishing a progenitor cell line from the embryonic stem cell; in which the progenitor cell line is selected based on its ability to self-renew. Preferably, the method selects against somatic cells based on their inability to self-renew. Preferably, the progenitor cell line is derived or established in the absence of co-culture, preferably in the absence of feeder cells, which preferably selects against embryonic stem cells. Optionally, the method comprises (d) deriving a differentiated cell from the progenitor cell line.
9 Citations
24 Claims
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1. A method of deriving a human mesenchymal progenitor cell line from a parental human embryonic stem cell, wherein the mesenchymal progenitor cell line comprises mesenchymal stem cells, the method comprising:
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(a) providing the parental embryonic stem cell or descendents of the parental embryonic stem cell obtained by dispersing an embryonic stem cell colony with trypsin, wherein the parental embryonic stem cell is a human embryonic stem cell; and (b) culturing the parental embryonic stem cell in the absence of feeder cells in rich media comprising (i) essential nutrients required for cell growth and (ii) serum or serum replacement, wherein the rich media does not comprise additional grown regulators of hormones that promote growth of embryonic stem cells, and wherein the culturing produces mesenchymal progenitor cells which self-renew; thereby establishing in the absence of transformation a mesenchymal progenitor cell line from the mesenchymal progenitor cells which self-renew;
wherein the mesenchymal progenitor cell line is maintainable in cell culture for more than 20 generations, and wherein the mesenchymal progenitor cell line is lineage restricted compared to the parental embryonic stem cell. - 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)
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Specification