Genetically altered human pluripotent stem cells
First Claim
1. A method of obtaining genetically altered primate pluripotent stem (pPS) cells or progeny thereof, comprising:
- a) providing a composition of pPS cells essentially free of feeder cells; and
b) transferring a polynucleotide into pPS cells in the composition.
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Accused Products
Abstract
This disclosure provides a system for obtaining genetically altered primate pluripotent stem (pPS) cells. The pPS cells are maintained in an undifferentiated state by culturing on a feeder cell line that has been immortalized and altered with drug resistance genes. Alternatively, the role of the feeder cells is replaced by supporting the culture on an extracellular matrix, and culturing the cells in a conditioned medium. The cells can be genetically altered with a viral vector or DNA/lipid complex, and then selected for successful transfection by drug-resistant phenotype in the transfected cells. The system allows for bulk proliferation of genetically altered pPS cells as important products for use in human therapy or drug screening.
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Citations
12 Claims
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1. A method of obtaining genetically altered primate pluripotent stem (pPS) cells or progeny thereof, comprising:
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a) providing a composition of pPS cells essentially free of feeder cells; and
b) transferring a polynucleotide into pPS cells in the composition. - View Dependent Claims (2, 3, 5, 6, 7)
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4. A method of producing genetically altered primate pluripotent stem (pPS) cells or progeny thereof, comprising:
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a) providing a composition of pPS cells on a layer of feeder cells that are drug-resistant;
b) transferring a polynucleotide into pPS cells in the composition; and
c) selecting genetically altered cells in the composition using the drug to which the feeder cells are resistant.
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- 8. An undifferentiated human pluripotent stem (hPS) cell genetically altered with a polynucleotide.
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9. A stably transfected undifferentiated human pluripotent stem cell.
- 10. A population of primate pluripotent stem (pPS) cells, in which at least 25% of the undifferentiated pPS cells have been transfected with a polynucleotide, or are the progeny of such cells that have inherited the polynucleotide.
Specification