Feeder independent extended culture of embryonic stem cells
First Claim
1. A method for culturing human embryonic stem cells in a feeder independent culture, the method comprising the step of culturing the human embryonic stem cells in a medium including salts, vitamins, amino acids, glucose, a fibroblast growth factor and a bone morphogenic protein antagonist in sufficient amount to maintain the stem cells in an undifferentiated state.
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Abstract
Previous methods for culturing human embryonic stem cells have required either fibroblast feeder cells or a medium which has been exposed to fibroblast feeder cells in order to maintain the stem cells in an undifferentiated state. It has now been found that if an antagonist of bone morphogenic protein is added to the medium in which the stem cells are cultured, together with fibroblast growth factor, the stem cells will remain undifferentiated indefinitely, even without feeder cells or conditioned medium.
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Citations
20 Claims
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1. A method for culturing human embryonic stem cells in a feeder independent culture, the method comprising the step of
culturing the human embryonic stem cells in a medium including salts, vitamins, amino acids, glucose, a fibroblast growth factor and a bone morphogenic protein antagonist in sufficient amount to maintain the stem cells in an undifferentiated state.
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5. In a method of culturing human embryonic stem cells in a medium including salts, vitamins, amino acids, and a fibroblast growth factor, the improvement comprising adding to the medium an amount of an antagonist of bone morphogenic protein signaling in an amount sufficient to maintain the cells in an undifferentiated state without exposure of the stem cells or the medium to feeder cells.
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6. In a method of culturing human embryonic stem cells in a medium including salts, vitamins, amino acids, and a fibroblast growth factor, the improvement comprising inhibiting the action of bone morphogenic protein signaling such that the stem cells can be maintained in an undifferentiated state without exposure to feeder cells or to medium exposed to feeder cells.
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7. An in vitro cell culture comprising in a culture vessel:
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human embryonic stem cells and a culture medium, the culture medium comprising salts, vitamins, amino acids, glucose, a fibroblast growth factor and a bone morphogenic protein signaling antagonist in sufficient amount to maintain the stem cells in an undifferentiated feeder independent state, the medium being free of feeder cells and never having been exposed to feeder cells. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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- 15. A medium for culturing embryonic stem cells in a feeder independent culture, the medium comprising salts, vitamins, amino acids, glucose, a fibroblast growth factor and a bone morphogenic protein antagonist in sufficient amount to maintain stem cells grown in the medium in an undifferentiated state without exposure to feeder cells or medium exposed to feeder cells.
Specification