Delivery of therapeutic agents by a collagen binding protein
Methods of delivering therapeutic agents by administering compositions including a bacterial collagen-binding polypeptide segment linked to the therapeutic agent to subjects in need of treatment with the therapeutic agent are provided. Methods of treating hyperparathyroidism, and hair loss using compositions comprising a collagen binding polypeptide and a PTH/PTHrP receptor agonist are provided. In addition, methods of reducing hair regrowth by administering a composition including a collagen binding polypeptide and a PTH/PTHrP receptor antagonist are provided.
1. A method of slowing hair growth comprising administering a composition comprising a bacterial collagen-binding polypeptide segment linked to a PTH/PTHrP receptor antagonist to a subject to slow hair growth relative to the hair growth the subject would experience without treatment, wherein the bacterial collagen-binding polypeptide segment comprises a collagen-binding polypeptide derived from an M9 peptidase selected from the group consisting of, one of SEQ ID NOs: 13-34 or a fragment of at least 8 consecutive amino acids of SEQ ID NOs: 13-34, residues 34-158 of SEQ ID NO: 1, a fragment of at least 8 consecutive amino acids from residues 34-158 of SEQ ID NO: 1, and a peptide that is at least 90% identical to residues 34-158 of SEQ ID NO: 1 or SEQ ID NOs: 13-34, and wherein the PTH/PTHrP receptor antagonist comprises a sequence selected from the group consisting of residues 7-33 of SEQ ID NO: 7, residues 7-14 of SEQ ID NO: 7, a fragment of at least 8 consecutive amino acids from residues 7-34 of SEQ ID NO: 7, and residues ((−1)-33) of PTH.
2. The method of claim 1 , wherein the composition is administered locally.
3. The method of claim 2 , wherein the composition is administered topically.
4. The method of claim 1 , wherein and the N-terminus of the collagen-binding polypeptide segment is linked directly or through a linker polypeptide segment to the C-terminus of the PTH/PTHrP receptor antagonist polypeptide.
5. The method of claim 1 , wherein the collagen-binding polypeptide segment and the PTH/PTHrP receptor antagonist polypeptide are chemically cross-linked to each other or are polypeptide portions of a fusion protein.
6. The method of claim 1 , wherein the subject is human.
7. The method of claim 1 , wherein the bacterial collagen-binding polypeptide segment comprises residues 34-158 of SEQ ID NO: 1 or a peptide that is at 90% identical to residues 34-158 of SEQ ID NO: 1.
8. The method of claim 1 , wherein the PTH/PTHrP receptor antagonist comprises residues 7-33 of SEQ ID NO: 7.
9. The method of claim 1 , wherein the bacterial collagen-binding polypeptide segment linked to the PTH/PTHrP receptor antagonist is a fusion protein comprising SEQ ID NO: 10.
10. The method of claim 4 , wherein the linker polypeptide segment comprises a PKD domain.
11. The method of claim 10 , wherein the PKD domain comprises residues 807-901 of SEQ ID NO: 6.
12. The method of claim 1 , wherein the composition is administered after the subject undergoes a hair removal procedure.