ANTIBODY TARGETING OSTEOCLAST-RELATED PROTEIN SIGLEC-15

• US 20120251485A1
• Filed: 04/27/2012
• Published: 10/04/2012
• Est. Priority Date: 10/11/2007
• Status: Active Grant

• Current Assignee: Daiichi Sankyo Company Limited
• Original Assignee: Daiichi Sankyo Company Limited
• Inventors: Hiruma, Yoshiharu, Tsuda, Eisuke
• Granted Patent: US 9,090,692 B2
• Time in Patent Office: Days
• US Class Current: 424/85.1
• CPC Class Codes: A61K 2039/505 comprising antibodies
• CPC Class Codes: A61K 2300/00 Mixtures or combinations of active ingredients, wherein at least one active ingredient is fully defined in groups A61K31/00 - A61K41/00
• CPC Class Codes: A61K 31/593 9,10-Secocholestane derivatives, e.g. cholecalciferol, i.e. vitamin D3
• CPC Class Codes: A61K 31/663 Compounds having two or more phosphorus acid groups or esters thereof, e.g. clodronic acid, pamidronic acid
• CPC Class Codes: A61K 39/395 Antibodies agglutinins A61K38/36 ; as drug carriers A61K47/50; Immunoglobulins; Immune serum, e.g. antilymphocytic serum
• CPC Class Codes: A61K 39/3955 against proteinaceous materials, e.g. enzymes, hormones, lymphokines
• CPC Class Codes: A61K 45/06 Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
• CPC Class Codes: A61P 1/02 Stomatological preparations, e.g. drugs for caries, aphtae, periodontitis
• CPC Class Codes: A61P 13/12 of the kidneys
• CPC Class Codes: A61P 19/00 Drugs for skeletal disorders
• CPC Class Codes: A61P 19/02 for joint disorders, e.g. arthritis, arthrosis
• CPC Class Codes: A61P 19/08 for bone diseases, e.g. rachitism, Paget's disease
• CPC Class Codes: A61P 19/10 for osteoporosis
• CPC Class Codes: A61P 29/00 Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
• CPC Class Codes: A61P 3/14 for calcium homeostasis vitamin D A61P3/02; parathyroid hormones A61P5/18; calcitonin A61P5/22; osteoporosis A61P19/10; bone metastasis A61P35/04
• CPC Class Codes: A61P 35/00 Antineoplastic agents
• CPC Class Codes: A61P 35/04 specific for metastasis
• CPC Class Codes: A61P 43/00 Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
• CPC Class Codes: A61P 7/00 Drugs for disorders of the blood or the extracellular fluid
• CPC Class Codes: C07K 16/2803 against the immunoglobulin superfamily
• CPC Class Codes: C07K 16/2851 : against the lectin superfamily, e.g. CD23, CD72
• CPC Class Codes: C07K 2317/14 : Specific host cells or culture conditions, e.g. components, pH or temperature
• CPC Class Codes: C07K 2317/34 : Identification of a linear epitope shorter than 20 amino acid residues or of a conformational epitope defined by amino acid residues
• CPC Class Codes: C07K 2317/76 : Antagonist effect on antigen, e.g. neutralization or inhibition of binding
• CPC Class Codes: C07K 2317/92 : Affinity (KD), association rate (Ka), dissociation rate (Kd) or EC50 value

Abstract

To provide a method of detecting abnormal bone metabolism by using a gene strongly expressed in an osteoclast; a method of screening a compound having a therapeutic and/or preventive effect on abnormal bone metabolism; and a pharmaceutical composition for treating and/or preventing abnormal bone metabolism. Provision of a method of detecting abnormal bone metabolism by using the expression of human Siglec-15 gene as an index; a pharmaceutical composition containing an antibody which specifically recognizes human Siglec-15 and has an activity of inhibiting osteoclast formation; and the like.

Claims

1-13. -13. (canceled)

14. A method of treating or preventing abnormal bone metabolism comprising administering a pharmaceutical composition comprising a monoclonal antibody or a functional fragment of the antibody, wherein the monoclonal antibody or the functional fragment of the monoclonal antibody binds one or more polypeptides comprising an amino acid sequence selected from the group consisting of:

(a) amino acid residues 21 to 328 of the amino acid sequence represented by SEQ ID NO;

2;

(b) amino acid residues 1 to 260 of the amino acid sequence represented by SEQ ID NO;

2;

(c) amino acid residues 21 to 260 of the amino acid sequence represented by SEQ ID NO;

2;

(d) amino acid residues 21 to 341 of the amino acid sequence represented by SEQ ID NO;

4;

(e) amino acid residues 1 to 258 of the amino acid sequence represented by SEQ ID NO;

4; and

(f) amino acid residues 21 to 258 of the amino acid sequence represented by SEQ ID NO;

4,

wherein said antibody or a functional fragment of the antibody inhibits osteoclast formation and/or osteoclastic bone resorption.

15. The method of claim 14, wherein said antibody or antibody fragment inhibits osteoclast formation.

16. The method of claim 14, wherein said antibody or antibody framgnet inhibits osteoclastic bone resorption.

17. The method according to claim 14, wherein the osteoclast formation is induced by TNF-α

.

18. The method according to claim 14, wherein the antibody or the functional fragment of the antibody inhibits in vitro osteoclast formation at a concentration of 30 μ

g/ml or less, 3 μ

g/ml or less, 1 μ

g/ml or less, or from 63 ng/ml to 1 μ

g/ml.

19. The method according to claim 14, wherein the antibody or the functional fragment of the antibody inhibits in vitro osteoclastic bone resorption at a concentration of 3 μ

g/ml or less or from 0.3 μ

g/ml to 3 μ

g/ml.

20. The method according to claim 14, wherein the antibody or the functional fragment of the antibody inhibits the process of cell fusion of osteoclasts.

21. The method according to claim 14, wherein the abnormal bone metabolism is selected from the group consisting of osteoporosis, bone destruction accompanying rheumatoid arthritis, cancerous hypercalcemia, bone destruction accompanying multiple myeloma or cancer metastasis to bone, giant cell tumor, tooth loss due to periodontitis, osteolysis around a prosthetic joint, bone destruction in chronic osteomyelitis, Paget'"'"'s disease of bone, renal osteodystrophy and osteogenesis imperfecta.

22. The method according to claim 21, wherein the osteoporosis is postmenopausal osteoporosis, senile osteoporosis, secondary osteoporosis caused by the use of a therapeutic agent selected from the group consisting of a steroid and an immunosuppressant, or osteoporosis accompanying rheumatoid arthritis.

23. The method according to claim 14, wherein the antibody has the same epitope specificity as an antibody produced by a hybridoma selected from the group consisting of hybridoma #32A1 (FERM BP-10999), and hybridoma #41B1 (FERM BP-11000).

24. The method according to claim 14, wherein the antibody competes with an antibody produced by a hybridoma selected from the group consisting of hybridoma #32A1 (FERM BP-10999), and hybridoma #41B1 (FERM BP-11000).

25. The method according to claim 14, wherein the antibody is produced by a hybridoma selected from the group consisting of hybridoma #32A1 (FERM BP-10999) and hybridoma #41B1 (FERM BP-11000).

26. The method according to claim 14, wherein the antibody is a chimeric antibody.

27. The method according to claim 14, wherein the antibody is humanized.

28. The method according to claim 14, wherein the antibody is a human antibody.

29. The method according to claim 14, wherein the functional fragment of the antibody is selected from the group consisting of Fab, F(ab′

)2, Fab′

, scFv, and Fv.

30. The method of claim 14, wherein the antibody is an IgG antibody.

31. The method of claim 14, wherein the pharmaceutical composition further comprises at least one agent selected from the group consisting of bisphosphonate, active vitamin D₃, calcitonin and derivatives thereof, hormone preparation such as estradiol, SERM (selective estrogen receptor modulator), ipriflavone, vitamin K₂ (menatetrenone), calcium preparation, PTH (parathyroid hormone) preparation, nonsteroidal anti-inflammatory agent, soluble TNF receptor preparation, anti-TNF-α

antibody or functional fragment of the antibody, anti-PTHrP (parathyroid hormone-related protein) antibody or functional fragment of the antibody, IL-1 receptor antagonists, anti-IL-6 receptor antibody or functional fragment of the antibody, anti-RANKL antibody or functional fragment of the antibody and OCIF (osteoclastogenesis inhibitory factor).

32. The method according to claim 14, wherein the pharmaceutical composition further comprises a pharmaceutically acceptable carrier.

33. The method of claim 14, wherein the pharmaceutical composition further comprises a pharmaceutically acceptable diluent, solubilizing agent, emulsifying agent, preservative or adjuvant.

34. The method of claim 14, wherein the pharmaceutical composition further comprises a substance for pharmaceutical use which is capable of changing or maintaining the pH, osmotic pressure, viscosity, transparency, color, isotonicity, aseptic condition, stability, solubility, release rate, absorption rate, or permeability.

35. The method of claim 14, wherein the pharmaceutical composition is parenterally or orally administered.

36. A method of treating or preventing abnormal bone metabolism comprising administering a pharmaceutical composition comprising a monoclonal antibody or a functional fragment of the antibody, wherein the monoclonal antibody or the functional fragment of the monoclonal antibody has the same epitope specificity as an antibody produced by a hybridoma selected from the group consisting of hybridoma #32A1 (FERM BP-10999), and hybridoma #41B1 (FERM BP-11000).

37. A method of treating or preventing abnormal bone metabolism comprising administering a pharmaceutical composition comprising a monoclonal antibody or a functional fragment of the antibody, wherein the monoclonal antibody or the functional fragment of the monoclonal antibody competes with an antibody produced by a hybridoma selected from the group consisting of hybridoma #32A1 (FERM BP-10999), and hybridoma #41B1 (FERM BP-11000).

38. A method of treating or preventing abnormal bone metabolism comprising administering a pharmaceutical composition comprising a monoclonal antibody or a functional fragment of the antibody, wherein the monoclonal antibody or the functional fragment of the monoclonal antibody is produced by a hybridoma selected from the group consisting of hybridoma #32A1 (FERM BP-10999) and hybridoma #41B1 (FERM BP-11000).

39. A method of treating or preventing abnormal bone metabolism comprising administering a pharmaceutical composition comprising a monoclonal antibody or a functional fragment of the antibody, wherein the monoclonal antibody or the functional fragment of the monoclonal antibody binds one or more polypeptides comprising an amino acid sequence encoded by a nucleotide sequence selected from the group consisting of:

(a) a nucleotide sequence represented by SEQ ID NO;

1;

(b) a nucleotide sequence represented by SEQ ID NO;

3;

(c) a nucleotide sequence represented by SEQ ID NO;

19; and

(d) a nucleotide sequence represented by SEQ ID NO;

43,

wherein said antibody or a functional fragment of the antibody inhibits osteoclast formation and/or osteoclastic bone resorption.