Treatment of PMSA expressing cancers

1. A method for treating PSMA expressing cancers, wherein the method comprises administering to a patient in need thereof an effective amount of one or more Ac-225-radiopharmaceuticals, said one or more Ac-225-radiopharmaceuticals comprising Ac-225 chelated with a targeting compound of Formula (A), (B), (C), (D) or (E):

with:

n: 0, 1

m: 1, 2, 3, 4

Z: —CO 2 H, —SO 2 H, —SO 3 H, —SO 4 H, —PO 2 H, —POSH, —PO 4 H 2

X: naphthyl, phenyl, biphenyl, indolyl (=2,3-benzopyrrolyl), benzothiazolyl

Y: aryl, alkylaryl, cyclopentyl, cyclohexyl, cycloheptyl

Chelator: 1,4,7,10-tetraazacyclododecane-N,N′,N″,N″-tetraacetic acid (DOTA),

N,N″-bis[2-hydroxy-5-(carboxyethyl)benzyl]ethylenediamine-N,N″-diacetic acid (HBED-CC),

1,4,7-triazacyclononane-1,4,7-triacetic acid (=NOTA),

2-(4,7-bis(carboxymethyl)-1,4,7-triazonan-1-yl)pentanedioic acid (NODAGA),

2-(4,7,10-tris(carboxymethyl)-1,4,7,10-tetraazacyclododecan-1-yl)pentanedioic acid (DOTAGA),

1,4,7-triazacyclononane phosphinic acid (TRAP),

1,4,7-triazacyclononane-1-[methyl(2-carboxyethyl)phosphinic acid]-4,7-bis[methyl(2-hydroxymethyl)phosphinic acid] (NOPO),

3,6,9,15-tetraazabicyclo[9.3.1]pentadeca-1(15), 11,13-triene-3,6,9-triacetic acid (PCTA),

N′-{5-[Acetyl(hydroxy)amino]pentyl}-N-[5-({4-[(5-aminopentyl)-(hydroxy)amino]-4-oxobutanoyl}amino)pentyl]-N-hydroxysuccinamide (DFO),

diethylenetriaminepentaacetic acid (DTPA),

Trans-cyclohexyl-diethylenetriaminepentaacetic acid (CHX-DTPA),

1-oxa-4,7,10-triazacyclododecane-4,7,10-triacetic acid (oxo-Do3A) p-isothiocyanatobenzyl-DTPA (SCN-Bz-DTPA),

1-(p-isothiocyanatobenzyI)-3-methyl-DTPA (1B3M),

2-(p-isothiocyanatobenzyI)-4-methyl-DTPA (1M3B), or

1-(2)-methyl-4-isocyanatobenzyl-DTPA (MX-DTPA)

or

wherein the effective amount of said one or more Ac-225-radiopharmaceuticals is administered as a dosage of from 25 kBq to 400 kBq/kg of body weight of said patient or wherein the effective amount of said one or more Ac-225-radiopharmaceuticals is administered as a unitary dosage of from 3 MBq to 30 MBq to said patient.

2. The method of claim 1 , wherein the one or more Ac-225-radiopharmaceuticals are selected from:

3. The method of claim 1 , wherein at least one Ac-225-radiopharmaceutical is Ac-225-PSMA-617, wherein Ac-225-PSMA-617 is a compound according to a formula

chelating a Ac-225 radionuclide with its 1,4,7,10-tetraazacyclodeodecane-N,N′, N″, N″′-tetraacetic acid moiety.

4. The method of claim 1 , wherein said PSMA expressing cancers are selected among prostate cancer, conventional renal cell cancers, cancers of the transitional cells of the bladder, testicular-embryonal cancers, neuroendocrine cancers, colon cancers, brain tumors and breast cancers.

5. The method of claim 1 , wherein the cancer is a disseminated cancer.

6. The method of claim 4 , wherein said PSMA expressing cancer is prostate cancer.

7. The method of claim 4 , wherein said PSMA expressing cancer is breast cancer.

8. The method of claim 1 , wherein the effective amount of said one or more Ac-225-radiopharmaceuticals is administered as a dosage of from 30 kBq to 250 kBq/kg of body weight.

9. The method of claim 8 , wherein the dosage ranges from 50 kBq to 200 kBq/kg of body weight.

10. The method of claim 1 , wherein the effective amount of said one or more Ac-225-radiopharmaceuticals is administered as a unitary dosage of from 4 MBq to 25 MBq.

11. The method of claim 10 , wherein the unitary dosage ranges from 5 MBq to 20 MBq.

12. The method of claim 8 , wherein administering of the effective amount of said one or more Ac-225-radiopharmaceuticals to the patient is repeated after 15 to 90 days.

13. The method of claim 10 , wherein administering of the effective amount of said one or more Ac-225-radiopharmaceuticals to the patient is repeated after 15 to 90 days.