Differentiation of human embryonic germ cells
First Claim
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1. A method of producing a cell population comprising differentiating in culture human embryonic germ (hEG) cells, wherein the hEG cells have the following culture characteristics during maintenance:
- (i) dependence on an agent that binds to gp 130 or that binds to a receptor that can associate with gp 130; and
(ii) dependence on a growth factor.
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Abstract
Primordial germ cells isolated from human embryonic tissue, such as from the gonadal ridges of human embryo, are disclosed. The primordial germ cells are cultured resulting in cells that resemble embryonic stem cells or embryonic germ cells in morphology and pluripotency. The cells are maintained several months in culture and can be genetically manipulated using transgenic technology to insert heterologous genetic material.
80 Citations
28 Claims
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1. A method of producing a cell population comprising differentiating in culture human embryonic germ (hEG) cells, wherein the hEG cells have the following culture characteristics during maintenance:
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(i) dependence on an agent that binds to gp 130 or that binds to a receptor that can associate with gp 130; and
(ii) dependence on a growth factor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of producing a population of restricted developmental lineage cells comprising:
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(a) maintaining hEG cells by culturing in a medium comprising a growth factor and an agent that binds to a receptor that can associate with gp 130, wherein the hEG cells have the following culture characteristics during maintenance;
(i) dependence on an agent that binds to gp 130 or that binds to a receptor that can associate with gp 130; and
(ii) dependence on a growth factor; and
then(b) differentiating the hEG cells. - View Dependent Claims (13, 14, 15)
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16. A method for producing human pluripotent embryonic germ (hEG) cells comprising:
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(a) preparing a suspension of primordial germ cells;
(b) culturing cells of the suspension with feeder cells in a medium comprising a factor that elevates cellular cAMP levels; and
(c) harvesting pluripotent embryonic germ cells from the culture. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
(d) dependence on an agent that binds to gp130 or that binds to a receptor that can associate with gp130; - and
(e) a growth factor.
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24. The method of claim 23, wherein the growth factor is basic fibroblast growth factor (bFGF).
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25. The method of claim 23, wherein the ligand that binds to a receptor which can associate with gp130 is oncostatin-M or LIF.
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26. The method of claim 23, wherein the agent that binds to and activates gp 130 is an antibody.
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27. The method of claim 16, wherein the cells that are produced have the following culture characteristics during maintenance:
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(i) dependence on an agent that binds to gp130 or that binds to a receptor that can associate with gp130; and
(ii) dependence on a growth factor.
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28. A method for producing a population of restricted developmental lineage cells, comprising producing hEG cells according to the method of claim 16, and then causing them to differentiate.
Specification