Dota-hapten compositions for anti-dota/anti-tumor antigen bispecific antibody pretargeted radioimmunotherapy

1. A compound of Formula I

or a pharmaceutically acceptable salt thereof, wherein

M 1 is 175 Lu 3+ , 45 Sc 3+ , 69 Ga 3+ , 71 Ga 3+ , 89 Y 3+ , 113 In 3+ , 115 In 3+ , 139 La 3+ , 136 Ce 3+ , 138 Ce 3+ , 140 Ce 3+ , 142 Ce 3+ , 151 Eu 3+ , 153 Eu 3+ , 159 Tb 3+ , 154 Gd 3+ , 155 Gd 3+ , 156 Gd 3+ , 157 Gd 3+ , 158 Gd 3+ , or 160Gd 3+ ;

X 1 , X 2 , X 3 , and X 4 are each independently a lone pair of electrons or H;

X 5 , X 6 , and X 7 are each independently a lone pair of electrons or H;

Y 1 is O or S; and

n is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, or 22,

optionally wherein at least two of X 1 , X 2 , X 3 , and X 4 are each independently a lone pair of electrons, or

optionally wherein three of X 1 , X 2 , X 3 , and X 4 are each independently a lone pair of electrons and the remaining X 1 , X 2 , X 3 , or X 4 is H.

2. A bischelate comprising the compound of claim 1 and a radionuclide cation.

3. The bischelate of claim 2 , wherein the bischelate is of Formula II

or a pharmaceutically acceptable salt thereof, wherein

M 1 is 175 Lu 3+ , 45 Sc 3+ , 69 Ga 3+ , 71 Ga 3+ , 89 Y 3+, 113 In 3+ , 115 In 3+ , 139 La 3+ , 136 Ce 3+ , 138 Ce 3+ , 140 Ce 3+ , 142 Ce 3+ , 151 Eu 3+ , 153 Eu 3+ , 159 Tb 3+ , 154 Gd 3+ , 155 Gd 3+ , 156 Gd 3+ , 157 Gd 3+ , 158 Gd 3+ , or 60Gd 3+ ;

M 2 is the radionuclide cation;

X 1 , X 2 , X 3 , and X 4 are each independently a lone pair of electrons or H;

X 5 , X 6 , and X 7 are each independently a lone pair of electrons or H;

Y 1 is O or S; and

n is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, or 22,

optionally wherein at least two of X 5 , X 6 , and X 7 are each independently a lone pair of electrons.

4. The bischelate of claim 2 , wherein the radionuclide cation is a divalent cation, a trivalent cation, an alpha particle-emitting isotope, a beta particle-emitting isotope, an Auger-emitter, 68 Ga, 227 Th, or 64 Cu.

5. A complex comprising the compound of claim 1 and an anti-tumor antigen bispecific antibody.

6. A complex comprising the bischelate of claim 2 and an anti-tumor antigen bispecific antibody.

7. A method for detecting solid tumors in a subject in need thereof comprising

(a) administering an effective amount of the complex of claim 6 to the subject; and

(b) detecting the presence of solid tumors expressing the tumor antigen in the subject by detecting radioactive levels emitted by the complex that are higher than a reference value, optionally wherein the radioactive levels emitted by the complex are detected using positron emission tomography or single photon emission computed tomography.

8. A method for selecting a subject for pretargeted radioimmunotherapy comprising

(a) administering an effective amount of the complex of claim 6 to the subject;

(b) detecting the presence of solid tumors expressing the tumor antigen in the subject by detecting radioactive levels emitted by the complex; and

(c) selecting the subject for pretargeted radioimmunotherapy when the radioactive levels emitted by the complex are higher than a reference value, optionally wherein the radioactive levels emitted by the complex are detected using positron emission tomography or single photon emission computed tomography.

9. The method of claim 8 , wherein the subject is diagnosed with, or is suspected of having a cancer selected from the group consisting of breast cancer, colorectal cancer, cervical cancer, ovarian cancer, liver cancer, bladder cancer, hepatoma, hepatocellular carcinoma, brain cancer, lung cancer, gastric or stomach cancer, pancreatic cancer, thyroid cancer, kidney or renal cancer, prostate cancer, melanoma, sarcomas, carcinomas, Wilms tumor, endometrial cancer, glioblastoma, squamous cell cancer, astrocytomas, salivary gland carcinoma, vulvar cancer, penile carcinoma, and head-and-neck cancer.

10. The method of claim 7 , wherein the complex is administered into the cerebral spinal fluid or blood of the subject or wherein the complex is administered intravenously, intramuscularly, intraarterially, intrathecally, intracapsularly, intraorbitally, intradermally, intraperitoneally, transtracheally, subcutaneously, intracerebroventricularly, orally or intranasally.

11. The method of claim 8 , wherein the complex is administered intravenously, intramuscularly, intraarterially, intrathecally, intracapsularly, intraorbitally, intradermally, intraperitoneally, transtracheally, subcutaneously, intracerebroventricularly, orally or intranasally or wherein the complex is administered into the cerebral spinal fluid or blood of the subject.

12. A method for increasing tumor sensitivity to radiation therapy in a subject diagnosed with cancer comprising

(a) administering an effective amount of an anti-DOTA bispecific antibody to the subject, wherein the anti-DOTA bispecific antibody binds to a tumor expressing a tumor antigen target; and

(b) administering an effective amount of the bischelate of claim 2 to the subject, wherein the bischelate binds to the anti-DOTA bispecific antibody.

13. The method of claim 12 , further comprising administering an effective amount of a clearing agent to the subject prior to administration of the bischelate, wherein the clearing agent is a 500 kD aminodextran-DOTA conjugate.

14. The method of claim 12 , wherein the tumor antigen target is selected from the group consisting of GPA33, HER2/neu, GD2, MAGE-1, MAGE-3, BAGE, GAGE-1, GAGE-2, MUM-1, CDK4, N-acetylglucosaminyltransferase, p15, gp75, beta-catenin, ErbB2, cancer antigen 125 (CA-125), carcinoembryonic antigen (CEA), RAGE, MART (melanoma antigen), MUC-1, MUC-2, MUC-3, MUC-4, MUC-5ac, MUC-16, MUC-17, tyrosinase, Pmel 17 (gp100), GnT-V intron V sequence (N-acetylglucoaminyltransferase V intron V sequence), Prostate cancer psm, PRAME (melanoma antigen), β-catenin, EBNA (Epstein-Barr Virus nuclear antigen) 1-6, p53, lung resistance protein (LRP) Bcl-2, prostate specific antigen (PSA), Ki-67, CEACAM6, colon-specific antigen-p (CSAp), HLA-DR, CD40, CD74, CD138, EGFR, EGP-1, EGP-2, VEGF, P1GF, insulin-like growth factor (ILGF), tenascin, platelet-derived growth factor, IL-6, CD20, CD19, PSMA, CD33, CD123, MET, DLL4, Ang-2, HER3, IGF-1R, CD30, TAG-72, SPEAP, CD45, L1-CAM, Lewis Y (Le y ) antigen, E-cadherin, V-cadherin, and EpCAM.

15. The method of claim 12 , wherein the anti-DOTA bispecific antibody and/or the bischelate is administered intravenously, intramuscularly, intraarterially, intrathecally, intracapsularly, intraorbitally, intradermally, intraperitoneally, transtracheally, subcutaneously, intracerebroventricularly, orally or intranasally.

16. A method for increasing tumor sensitivity to radiation therapy in a subject diagnosed with cancer comprising

administering an effective amount of the complex of claim 6 to the subject.

17. A method for treating cancer in a subject in need thereof comprising

(a) administering an effective amount of an anti-DOTA bispecific antibody to the subject, wherein the anti-DOTA bispecific antibody binds to a tumor expressing a tumor antigen target; and

(b) administering an effective amount of the bischelate of claim 2 to the subject, wherein the bischelate binds to the anti-DOTA bispecific antibody.

18. A method for treating cancer in a subject in need thereof comprising

administering an effective amount of the complex of claim 6 to the subject.

19. A kit comprising a bischelate of claim 2 , at least one anti-DOTA BsAb, and instructions for use.

20. The kit of claim 19 further comprising a clearing agent and/or one or more radionuclides, wherein the clearing agent is a 500 kD aminodextran-DOTA conjugate.

21. The bischelate of claim 4 , wherein

the alpha particle-emitting isotope is selected from the group consisting of 213 Bi, 211 At, 225 Ac, 152 Dy, 212 Bi, 223 Ra, 219 Rn, 215 Po, 211 Bi, 221 Fr, 217 At, and 255 Fm; or

the beta particle-emitting isotope is selected from the group consisting of 86 Y, 90 Y, 89 Sr, 165 Dy, 186 Re, 188 Re, 177 Lu, and 67 Cu; or

the Auger-emitter is selected from the group consisting of 111 In, 67 Ga, 51 Cr, 58 Co, 99 mTc, 103 mRh, 195 mPt, 119 Sb, 161 Ho, 189 mOs, 192 Ir, 201 T1, and 203 Pb.

22. The complex of claim 5 , wherein the tumor antigen is selected from the group consisting of GPA33, HER2/neu, GD2, MAGE-1, MAGE-3, BAGE, GAGE-1, GAGE-2, MUM-1, CDK4, N-acetylglucosaminyltransferase, p15, gp75, beta-catenin, ErbB2, cancer antigen 125 (CA-125), carcinoembryonic antigen (CEA), RAGE, MART (melanoma antigen), MUC-1, MUC-2, MUC-3, MUC-4, MUC-5ac, MUC-16, MUC-17, tyrosinase, Pmel 17 (gp100), GnT-V intron V sequence (N-acetylglucoaminyltransferase V intron V sequence), Prostate cancer psm, PRAIVIE (melanoma antigen), β-catenin, EBNA (Epstein-Barr Virus nuclear antigen) 1-6, p53, lung resistance protein (LRP) Bc1-2, prostate specific antigen (PSA), Ki-67, CEACAM6, colon-specific antigen-p (CSAp), HLA-DR, CD40, CD74, CD138, EGFR, EGP-1, EGP-2, VEGF, P1GF, insulin-like growth factor (ILGF), tenascin, platelet-derived growth factor, IL-6, CD20, CD19, PSMA, CD33, CD123, MET, DLL4, Ang-2, HER3, IGF-1R, CD30, TAG-72, SPEAP, CD45, L1-CAM, Lewis Y (Le y ) antigen, E-cadherin, V-cadherin, and EpCAM.

23. The complex of claim 6 , wherein the tumor antigen is selected from the group consisting of GPA33, HER2/neu, GD2, MAGE-1, MAGE-3, BAGE, GAGE-1, GAGE-2, MUM-1, CDK4, N-acetylglucosaminyltransferase, p15, gp75, beta-catenin, ErbB2, cancer antigen 125 (CA-125), carcinoembryonic antigen (CEA), RAGE, MART (melanoma antigen), MUC-1, MUC-2, MUC-3, MUC-4, MUC-5ac, MUC-16, MUC-17, tyrosinase, Pmel 17 (gp100), GnT-V intron V sequence (N-acetylglucoaminyltransferase V intron V sequence), Prostate cancer psm, PRAIVIE (melanoma antigen), β-catenin, EBNA (Epstein-Barr Virus nuclear antigen) 1-6, p53, lung resistance protein (LRP) Bc1-2, prostate specific antigen (PSA), Ki-67, CEACAM6, colon-specific antigen-p (CSAp), HLA-DR, CD40, CD74, CD138, EGFR, EGP-1, EGP-2, VEGF, P1GF, insulin-like growth factor (ILGF), tenascin, platelet-derived growth factor, IL-6, CD20, CD19, PSMA, CD33, CD123, MET, DLL4, Ang-2, HER3, IGF-1R, CD30, TAG-72, SPEAP, CD45, L1-CAM, Lewis Y (Le y ) antigen, E-cadherin, V-cadherin, and EpCAM.