HER3 specific monoclonal antibodies for diagnostic and therapeutic use

1. An isolated monoclonal antibody, wherein the antibody specifically binds to HER3 and is selected from the group consisting of:

(a) an antibody comprising a first V H CDR of Rab46 (SEQ ID NO: 9), a second V H CDR of Rab46 (SEQ ID NO: 10), a third V H CDR of Rab46 (SEQ ID NO: 11), a first V L CDR of Rab46 (SEQ ID NO: 12), a second V L CDR of Rab46 (SEQ ID NO: 13), and a third V L CDR of Rab46 (SEQ ID NO: 14);

(b) an antibody comprising a first V H CDR of Rab1210 (SEQ ID NO: 15), a second V H CDR of Rab1210 (SEQ ID NO: 16), a third V H CDR of Rab1210 (SEQ ID NO: 17), a first V L CDR of Rab1210 (SEQ ID NO: 18), a second V L CDR of Rab1210 (SEQ ID NO: 19), and a third V L CDR of Rab1210 (SEQ ID NO: 20);

(c) an antibody comprising a first V H CDR of Rab189 (SEQ ID NO: 21), a second V H CDR of Rab189 (SEQ ID NO: 22), a third V H CDR of Rab189 (SEQ ID NO: 23), a first V L CDR of Rab189 (SEQ ID NO: 24), a second V L CDR of Rab189 (SEQ ID NO: 25), and a third V L CDR of Rab189 (SEQ ID NO: 26); and

(d) an antibody comprising a first V H CDR of Rab774 (SEQ ID NO: 27), a second V H CDR of Rab774 (SEQ ID NO: 28), a third V H CDR of Rab774 (SEQ ID NO: 29), a first V L CDR of Rab774 (SEQ ID NO: 30), a second V L CDR of Rab774 (SEQ ID NO: 31), and a third V L CDR of Rab774 (SEQ ID NO: 32).

2. The isolated antibody of claim 1 , wherein the antibody comprises:

(a) a first V H CDR is identical to SEQ ID NO: 9;

(b) a second V H CDR is identical to SEQ ID NO: 10;

(c) a third V H CDR is identical to SEQ ID NO: 11;

(d) a first V L CDR is identical to SEQ ID NO: 12;

(e) a second V L CDR is identical to SEQ ID NO: 13; and

(f) a third V L CDR is identical to SEQ ID NO: 14.

3. The isolated antibody of claim 1 , wherein the antibody comprises:

(a) a first V H CDR is identical to SEQ ID NO: 15;

(b) a second V H CDR is identical to SEQ ID NO: 16;

(c) a third V H CDR is identical to SEQ ID NO: 17;

(d) a first V L CDR is identical to SEQ ID NO: 18;

(e) a second V L CDR is identical to SEQ ID NO: 19; and

(f) a third V L CDR is identical to SEQ ID NO: 20.

4. The isolated antibody of claim 1 , wherein the antibody comprises:

(a) a first V H CDR is identical to SEQ ID NO: 21;

(b) a second V H CDR is identical to SEQ ID NO: 22;

(c) a third V H CDR is identical to SEQ ID NO: 23;

(d) a first V L CDR is identical to SEQ ID NO: 24;

(e) a second V L CDR is identical to SEQ ID NO: 25; and

(f) a third V L CDR is identical to SEQ ID NO: 26.

5. The isolated antibody of claim 1 , wherein the antibody comprises:

(a) a first V H CDR is identical to SEQ ID NO: 27;

(b) a second V H CDR is identical to SEQ ID NO: 28;

(c) a third V H CDR is identical to SEQ ID NO: 29;

(d) a first V L CDR is identical to SEQ ID NO: 30;

(e) a second V L CDR is identical to SEQ ID NO: 31; and

(f) a third V L CDR is identical to SEQ ID NO: 32.

6. The antibody of claim 1 , wherein the antibody comprises:

(i) a V H domain at least about 90% identical to the V H domain of Rab46 (SEQ ID NO: 1); hRab46H-1 (SEQ ID NO: 33); or hRab46H-2 (SEQ ID NO: 34); and a V L domain at least about 90% identical to the V L domain of Rab46 (SEQ ID NO: 2); hRab46L-1 (SEQ ID NO: 35); or hRab46L-2 (SEQ ID NO: 36);

(ii) a V H domain at least about 90% identical to the V H domain of Rab1210 (SEQ ID NO: 3); hRab1210H-1 (SEQ ID NO: 37); or hRab1210H-2 (SEQ ID NO: 38); and a V L domain at least about 90% identical to the V L domain of Rab1210 (SEQ ID NO: 4); hRab1210L-1 (SEQ ID NO: 39); or hRab1210L-2 (SEQ ID NO: 40);

(iii) a V H domain at least about 90% identical to the V H domain of Rab189 (SEQ ID NO: 5) and a V L domain at least about 90% identical to the V L domain of Rab189 (SEQ ID NO: 6); or

(iv) a V H domain at least about 90% identical to the V H domain of Rab774 (SEQ ID NO: 7) and a V L domain at least about 90% identical to the V L domain of Rab774 (SEQ ID NO: 8).

7. The antibody of claim 6 , wherein the antibody comprises a V H domain identical to the V H domain of Rab46 (SEQ ID NO: 1) and a V L domain identical to the V L domain of Rab46 (SEQ ID NO: 2).

8. The antibody of claim 6 , wherein the antibody comprises a V H domain identical to the V H domain of Rab1210 (SEQ ID NO: 3) and a V L domain identical to the V L domain of Rab1210 (SEQ ID NO: 4).

9. The antibody of claim 6 , wherein the antibody comprises a V H domain identical to the V H domain of Rab189 (SEQ ID NO: 5) and a V L domain identical to the V L domain of Rab189 (SEQ ID NO: 6).

10. The antibody of claim 6 , wherein the antibody comprises a V H domain identical to the V H domain of Rab774 (SEQ ID NO: 7) and a V L domain identical to the V L domain of Rab774 (SEQ ID NO: 8).

11. The antibody of claim 6 , wherein the antibody is the Rab46, Rab1210, Rab189, Rab774, HER3-hMab-A9, HER3-hMab-A10, HER3-hMab-A11, HER3-hMab-A12, HER3-hMab-A13, HER3-hMab-A14, HER3-hMab-A15 or HER3-hMab-A16 antibody.

12. The antibody of claim 11 , wherein the antibody is the HER3-hMab-A9, HER3-hMab-A10, HER3-hMab-A11, HER3-hMab-A12, HER3-hMab-A13, HER3-hMab-A14, HER3-hMab-A15 or HER3-hMab-A16 antibody.

13. The antibody of claim 1 , wherein the antibody is recombinant.

14. The antibody of claim 1 , wherein the antibody is a human, humanized antibody or de-immunized antibody.

15. The antibody of claim 1 , wherein the antibody is conjugated to an imaging agent, a chemotherapeutic agent, a toxin or a radionuclide.

16. A composition comprising an antibody of claim 1 in a pharmaceutically acceptable carrier.

17. A method for treating a subject having a HER3-expressing cancer comprising administering an effective amount of an antibody of claim 1 to the subject.

18. The method of claim 17 , wherein the cancer is a breast cancer, lung cancer, head & neck cancer, prostate cancer, esophageal cancer, tracheal cancer, skin cancer brain cancer, liver cancer, bladder cancer, stomach cancer, pancreatic cancer, ovarian cancer, uterine cancer, cervical cancer, testicular cancer, colon cancer, rectal cancer or skin cancer.