Claims
- 1. A fusion protein comprising a transferrin (Tf) protein exhibiting reduced glycosylation fused to at least one therapeutic protein or peptide.
- 2. A fusion protein of claim 1, wherein the serum half-life of the therapeutic protein or peptide is increased over the serum half-life of the therapeutic protein or peptide in an unfused state.
- 3. A fusion protein of claim 1, wherein the therapeutic protein or peptide is fused to the C-terminal end of Tf.
- 4. A fusion protein of claim 1, wherein the therapeutic protein or peptide is fused to the N-terminal end of Tf.
- 5. A fusion protein of claim 1, wherein the therapeutic protein or peptide is inserted into at least one loop of the Tf.
- 6. A fusion protein of claim 1, wherein the Tf protein has reduced affinity for a TfR.
- 7. The fusion protein of claims 1-5, wherein the Tf protein is lacto transferrin (lactoferrin).
- 8. A fusion protein of claim 6, wherein the TF protein does not bind a TfR.
- 9. A fusion protein of claim 1, wherein the Tf protein has reduced affinity for iron.
- 10. A fusion protein of claim 9, where the Tf protein does not bind iron.
- 11. A fusion protein of claim 1, wherein said Tf protein comprises at least one mutation that prevents glycosylation.
- 12. A fusion protein of claim 11, wherein the Tf protein is lacto transferrin (lactoferrin).
- 13. A fusion protein of claim 1, which is expressed in the presence of tunicamycin
- 14. A fusion protein of claim 1, wherein said Tf protein comprises a portion of the N domain of a Tf protein, a bridging peptide and a portion of the C domain of a Tf protein.
- 15. A fusion protein of claim 14, wherein the bridging peptide links the therapeutic protein or peptide to Tf
- 16. A fusion protein of claim 14, wherein said therapeutic protein, peptide or polypeptide is inserted between an N and a C domain of Tf protein.
- 17. A fusion protein of claim 1, wherein the Tf protein have at least one amino acid substitution, deletion or addition in the hinge region.
- 18. A fusion protein of claim 17, wherein said hinge region is selected from the group consisting of about residue 94 to about residue 96, about residue 245 to about residue 247, about residue 316 to about residue 318, about residue 425 to about residue 427, about residue 581 to about residue 582 and about residue 652 to about residue 658.
- 19. A fusion protein of claim 1, wherein said Tf protein has at least one amino acid substitution, deletion or addition at a position selected from the group consisting of Asp 63, Gly 65, Tyr 95, Tyr 188, Lys 206, His 207, His 249, Asp 392, Tyr 426, Tyr 514, Tyr 517, His 585, Thr 120, Arg 124, Ala 126, Gly 127, Thr 452, Arg 456, Ala 458 and Gly 459.
- 20. A fusion protein of claim 5, wherein the therapeutic protein or peptide replaces at least one loop.
- 21. A fusion protein of claim 11, wherein the glycosylation site is selected from the group consisting of an amino acid residue corresponding to amino acids N413, N611.
- 22. A fusion protein of claim 6 or 8, wherein the Tf comprises at least one amino acid substitution, deletion or addition at an amino acid residue corresponding to an amino acid selected from the group consisting of Asp 63, Gly 65, Tyr 95, Tyr 188, Lys 206, His 207, His 249, Asp 392, Tyr 426, Tyr 514, Tyr 517, His 585, Thr 120, Arg 124, Ala 126, Gly 127, Thr 452, Arg 456, Ala 458 and Gly 459.
- 23. A fusion protein comprising a transferrin (Tf) protein exhibiting reduced affinity for a transferrin receptor (TfR) fused to at least one therapeutic protein or peptide.
- 24. A fusion protein of claim 1, wherein the serum half-life of the therapeutic protein or peptide is increased over the serum half-life of the therapeutic protein or peptide in an unfused state.
- 25. A fusion protein of claim 1, wherein the therapeutic protein or peptide is fused to the C-terminal end of Tf.
- 26. A fusion protein of claim 1, wherein the therapeutic protein or peptide is fused to the N-terminal end of Tf.
- 27. A fusion protein of claim 1, wherein the therapeutic protein or peptide is inserted into at least one loop of the Tf.
- 28. A fusion protein of claim 23, wherein the TF protein does not bind a TfR.
- 29. A fusion protein of claim 23, wherein the Tf protein has reduced affinity for iron.
- 30. A fusion protein of claim 9, wherein the Tf protein does not bind iron.
- 31. A fusion protein of claim 23, wherein said Tf protein exhibits reduced or no glycosylation.
- 32. A fusion protein of claim 31, comprising at least one mutation that prevents glycosylation.
- 33. A fusion protein of claim 23, wherein said Tf protein comprises a portion of the N domain of a Tf protein, a bridging peptide and a portion of the C domain of a Tf protein.
- 34. A fusion protein of claim 33, wherein the bridging peptide links the therapeutic protein or peptide to Tf.
- 35. A fusion protein of claim 33, wherein said therapeutic protein, peptide or polypeptide is inserted between an N and a C domain of Tf protein.
- 36. A fusion protein of claim 23, wherein the Tf protein have at least one amino acid substitution, deletion or addition in the Tf hinge region.
- 37. A fusion protein of claim 36, wherein said hinge region is selected from the group consisting of about residue 94 to about residue 96, about residue 245 to about residue 247, about residue 316 to about residue 318, about residue 425 to about residue 427, about residue 581 to about residue 582 and about residue 652 to about residue 658.
- 38. A fusion protein of claim 23, wherein said Tf protein has at least one amino acid substitution, deletion or addition at a position selected from the group consisting of Asp 63, Gly 65, Tyr 95, Tyr 188, Lys 206, His 207, His 249, Asp 392, Tyr 426, Tyr 514, Tyr 517, His 585, Thr 120, Arg 124, Ala 126, Gly 127, Thr 452, Arg 456, Ala 458 and Gly 459.
- 39. A fusion protein of claim 25, wherein the therapeutic protein or peptide replaces at least one loop.
- 40. A fusion protein of claim 31, wherein the glycosylation site is selected from the group consisting of an amino acid residue corresponding to amino acids N413, N611.
- 41. A nucleic acid molecule encoding a fusion protein of either claim 1 or 23.
- 42. A vector comprising a nucleic acid molecule of claim 41.
- 43. A host cell comprising a vector of claim 42.
- 44. A host cell comprising a nucleic acid molecule of claim 41.
- 45. A method of expressing a Tf fusion protein comprising culturing a host cell of claim 43 under conditions which express the encoded fusion protein.
- 46. A method of expressing a Tf fusion protein comprising culturing a host cell of claim 44 under conditions which express the encoded fusion protein.
- 47. A host cell of claim 43, wherein the cell is prokaryotic or eukaryotic.
- 48. A host cell of claim 44, wherein the cell is prokaryotic or eukaryotic.
- 49. A host cell of claim 47, wherein the cell is a yeast cell.
- 50. A host cell of claim 48, wherein the cell is a yeast cell.
- 51. A transgenic animal comprising a nucleic acid molecule of 41.
- 52. A method of producing a Tf fusion protein comprising isolating a fusion protein from a transgenic animal of claim 51.
- 53. A method of claim 52, wherein the Tf fusion protein comprises lactoferrin.
- 54. A method of claim 53, wherein the fusion protein is isolated from a biological fluid from the transgenic animal.
- 55. A method of claim 53, wherein the fluid is serum or milk.
- 56. A method of treating a disease or disease symptom in a patient, comprising the step of administering a fusion protein of claim 1 or claim 23.
RELATED APPLICATIONS
[0001] This application claims priority to U.S. provisional application No. 60/315,745, filed Aug. 30, 2001 and U.S. provisional application No. 60,334,059, filed Nov. 30, 2001, both of which are herein incorporated by reference in their entirety.
Provisional Applications (2)
|
Number |
Date |
Country |
|
60315745 |
Aug 2001 |
US |
|
60334059 |
Nov 2001 |
US |