Anti-human GPVI antibodies and uses thereof

1. An isolated humanized protein binding to human Glycoprotein VI (hGPVI) wherein said protein is an antibody molecule, or an antibody fragment,

wherein the variable region of the heavy chain comprises the following CDRs:

(SEQ ID NO: 1)

VH-CDR1: GYTFTSYNMH;

(SEQ ID NO: 2)

VH-CDR2: GIYPGNGDTSYNQKFQG;

and

(SEQ ID NO: 3)

VH-CDR3: GTVVGDWYFDV,

and

wherein the variable region of the light chain comprises the following CDRs:

(SEQ ID NO: 4)

VL-CDR1: RSSQSLENSNGNTYLN;

(SEQ ID NO: 5)

VL-CDR2: RVSNRFS;

and

(SEQ ID NO: 6)

VL-CDR3: LQLTHVPWT.

2. The isolated humanized protein binding to human Glycoprotein VI (hGPVI) according to claim 1 , wherein said protein binds to a conformational epitope comprising:

at least one amino acid residue from a sequence sharing at least 60% of identity over amino acid residues 114 to 142 of hGPVI (SEQ ID NO: 13); and

at least one amino acid residue from a sequence sharing at least 60% of identity over amino acid residues 165 to 187 of hGPVI (SEQ ID NO: 13).

3. The isolated humanized protein binding to human Glycoprotein VI (hGPVI) according to claim 1 , wherein said protein binds to a conformational epitope comprising:

at least one amino acid residue from amino acid residues 114 to 142 of hGPVI (SEQ ID NO: 13); and

at least one amino acid residue from amino acid residues 165 to 187 of hGPVI (SEQ ID NO: 13).

4. The isolated humanized protein binding to human Glycoprotein VI (hGPVI) according to claim 2 , wherein said conformational epitope comprises:

at least one amino acid residue from a sequence sharing at least 60% of identity over amino acid residues 121 to 135 of hGPVI (SEQ ID NO: 13); and

at least one amino acid residue from a sequence sharing at least 60% of identity over amino acid residues 169 to 183 of hGPVI (SEQ ID NO: 13).

5. The isolated humanized protein binding to human Glycoprotein VI (hGPVI) according to claim 2 , wherein said conformational epitope comprises:

at least one amino acid residue from amino acid residues 121 to 135 of hGPVI (SEQ ID NO: 13); and

at least one amino acid residue from amino acid residues 169 to 183 of hGPVI (SEQ ID NO: 13).

6. The isolated humanized protein binding to human Glycoprotein VI (hGPVI) according to claim 1 , wherein said protein has a K D for binding to hGPVI less than 15 nM, wherein said K D is measured by surface plasmon resonance using 960 to 1071 RU of soluble human GPVI and using PBS pH 7.4 as running buffer, and wherein said isolated humanized protein does not induce a GPVI depletion phenotype in vivo.

7. The isolated humanized protein binding to human Glycoprotein VI (hGPVI) according to claim 1 , comprising an antibody molecule selected from the group consisting of a whole antibody, a humanized antibody, a single chain antibody, a Fv, and a Fab.

8. The isolated humanized protein binding to human Glycoprotein VI (hGPVI) according to claim 1 , comprising a unibody.

9. The isolated humanized protein binding to human Glycoprotein VI (hGPVI) according to claim 1 , comprising a monovalent antibody.

10. The isolated humanized protein binding to human Glycoprotein VI (hGPVI) according to claim 1 , comprising an antibody wherein the amino acid sequence encoding the heavy chain variable region is at least 60% identical to SEQ ID NO: 7 and the amino acid sequence encoding the light chain variable region is at least 60% identical to SEQ ID NO: 8.

11. The isolated humanized protein binding to human Glycoprotein VI (hGPVI) according to claim 1 , comprising an antibody wherein the amino acid sequence encoding the heavy chain variable region is at least 60% identical to SEQ ID NO: 7 and the amino acid sequence encoding the light chain variable region is at least 60% identical to SEQ ID NO: 9.

12. The isolated humanized protein binding to human Glycoprotein VI (hGPVI) according to claim 1 , comprising an antibody wherein the amino acid sequence encoding the heavy chain variable region is SEQ ID NO: 7 and the amino acid sequence encoding the light chain variable region is SEQ ID NO: 8.

13. The isolated humanized protein binding to human Glycoprotein VI (hGPVI) according to claim 1 , comprising an antibody wherein the amino acid sequence encoding the heavy chain variable region is SEQ ID NO: 7 and the amino acid sequence encoding the light chain variable region is SEQ ID NO: 9.

14. A method for treating a cardiovascular disease, wherein said method comprises administering an isolated humanized protein binding to human Glycoprotein VI (hGPVI), wherein said protein is an antibody molecule, or an antibody fragment,

wherein the variable region of the heavy chain comprises the following CDRs:

(SEQ ID NO: 1)

VH-CDR1: GYTFTSYNMH;

(SEQ ID NO: 2)

VH-CDR2: GIYPGNGDTSYNQKFQG;

and

(SEQ ID NO: 3)

VH-CDR3: GTVVGDWYFDV,

and

wherein the variable region of the light chain comprises the following CDRs:

(SEQ ID NO: 4)

VL-CDR1: RSSQSLENSNGNTYLN;

(SEQ ID NO: 5)

VL-CDR2: RVSNRFS;

and

(SEQ ID NO: 6)

VL-CDR3: LQLTHVPWT.

15. The method according to claim 14 , wherein said cardiovascular disease is selected from the group consisting of arterial and venous thrombosis, restenosis and thromboembolic diseases.

16. The method according to claim 14 , wherein said cardiovascular disease is selected from coronary artery diseases, cerebral artery diseases, peripheral artery diseases, and venous thrombosis.

17. The method according to claim 14 , wherein said cardiovascular disease is selected from acute coronary syndrome, ischemic cerebrovascular accidents, myocardial infarction, stroke, acute phlebitis, and pulmonary embolism.