Transgenically produced platelet derived growth factor
First Claim
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1. A method of producing platelet derived growth factor (PDGF), comprising:
- providing a transgenic mammal whose somatic and germ cells comprise a nucleic acid sequence encoding PDGF operably linked to a promoter which directs expression into mammary gland epithelial cells; and
obtaining milk from the transgenic mammal, wherein at least 30% of the PDGF in the milk is as a dimer.
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Abstract
The invention features transgenically produced PDGF, e.g., transgenically produced PDGF which is expressed in the milk of a transgenic mammal, and is present in the milk in active form, e.g., as a dimer. The invention also features methods of producing transgenic PDGF, transgenic animals capable of expressing PDGF, and nucleic acid sequences encoding PDGF, e.g., nucleic acid sequences encoding PDGF under the control of a mammary gland specific promoter.
10 Citations
31 Claims
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1. A method of producing platelet derived growth factor (PDGF), comprising:
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providing a transgenic mammal whose somatic and germ cells comprise a nucleic acid sequence encoding PDGF operably linked to a promoter which directs expression into mammary gland epithelial cells; and
obtaining milk from the transgenic mammal, wherein at least 30% of the PDGF in the milk is as a dimer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of producing a transgenic mammal capable of expressing an active PDGF molecule in its milk, comprising
introducing into a cell a nucleic acid sequence encoding a PDGF chains operably linked to a promoter which directed expression in mammary epithelial cells; - and
allowing the cell to give rise to a transgenic mammal, wherein the transgenic mammal expresses PDGF in its milk and at least 30% of the PDGF is present in the milk is in active form. - View Dependent Claims (9, 10)
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11. A method of producing a transgenic mammal capable of expressing an active PDGF molecule in its milk, comprising:
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introducing into a cell a nucleic acid sequence encoding a PDGF A chain operably linked to a promoter which directs expression in mammary epithelial cells;
introducing into the cell a nucleic acid sequence encoding a PDGF B chain operably linked to a promoter which directs expression in mammary epithelial cells; and
allowing the cell to give rise to a transgenic mammal, wherein the transgenic mammal expresses PDGF in its milk and at least 30% of the PDGF is present in the milk in active form. - View Dependent Claims (12, 13)
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14. A method of producing a transgenic mammal capable of expressing an active PDGF molecule in its milk, comprising:
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providing a cell from a transgenic mammal whose germ and somatic cells comprise a nucleic acid sequence encoding a PDGF-A chain operably linked to a promoter which directs expression in mammary epithelial cells;
introducing into the cell a nucleic acid sequence encoding a PDGF-B chain operably linked to a promoter which directs expression in mammary epithelial cells; and
allowing the cell to give rise to a transgenic mammal, wherein the transgenic mammal expresses PDGF in its milk and at least 30% of the PDGF is present in the milk in active form. - View Dependent Claims (15, 16)
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- 17. A milk preparation obtained from a transgenic mammal whose genome contains a nucleic acid sequence encoding at least one PDGF chain operably linked to a promoter which directs expression in mammary epithelial cells, wherein the PDGF chain is expressed in the mammary epithelial cells the transgenic mammal and wherein at least 30% of the PDGF in the milk is present as a dimer.
- 25. An isolated nucleic acid comprising a nucleic acid sequence encoding a biologically active PDGF or a homolog thereof operatively linked to a regulatory sequence capable of directing the expression of PDGF in the mammary gland of non-human transgenic mammals.
Specification