Patent Application
20230022235
Next-generation antiandrogens such as enzalutamide, apalutamide, and darolutamide, and androgen synthesis inhibitors such as abiraterone have been approved for treatment of castration resistant prostate cancer (CRPC) patients both before and after chemotherapy. These therapies, although effective initially, rapidly result in development of resistance to the agents resulting in progression of disease. Urgent ongoing work is being conducted to unravel potential resistance mechanisms in order to devise ways of targeting resistance pathways that perpetuate disease progression during effective AR blockade. Considerable evidence from both clinical and experimental studies demonstrates that androgen receptor (AR) and its variant 7 (AR-V7) play vital roles in promoting CRPC progression during androgen deprivation therapy and induction of resistance to enzalutamide and abiraterone therapy. Recent studies also suggest that AKR1C3 activation and enhanced synthesis of intracrine androgens contribute to enzalutamide and abiraterone resistance. AKR1C3 is overexpressed and intracrine androgens are elevated in enzalutamide/abiraterone resistant prostate cancer cells.
Provided herein are compounds according to Formula I.
Also provided herein are pharmaceutical compositions containing one or more compounds as described herein and one or more pharmaceutically acceptable excipients.
Also provided herein are methods for treating a hormone-mediated disease or condition such as cancer, e.g., castration-resistant prostate cancer. The methods include administering a therapeutically effective amount of a compound or composition ad described herein to a subject in need thereof, thereby treating the hormone-mediated disease or condition.
Also provided herein are methods for inhibiting an androgen receptor (AR) and/or aldo-keto reductase family 1 member C3 (AKR1C3). The methods include contacting the AR and/or the AKR1C3 with an effective amount of a compound according as described herein thereby inhibiting the AR and/or the AKR1C3.
The present invention is based, in part, on the recognition that inhibition of both AR/ARv7 and AKR1C3 would be an ideal strategy for treating hormone-related cancers, such as advanced prostate cancer, and overcoming resistance to current therapies.
Overexpression of AKR1C3 confers resistance to enzalutamide/abiraterone, while down regulation of AKR1C3 sensitizes cells to enzalutamide/abiraterone treatment. Importantly, overexpression of AKR1C3 has been demonstrated in clinical metastatic prostate cancer. As described herein, a number of new benzamide compounds have been surprisingly found to function as dual inhibitors of AR and AKR1C3. The benzamides inhibit both expression and activity of AR/ARv7 and AKR1C3 in prostate cancer cells, as well as the growth of resistant prostate cancer cells. Furthermore, the compounds inhibit enzalutamide-resistant C4-2B MDVR cell growth, abiraterone-resistant cell growth, apalutamide-resistant cell growth, and darolutamide-resistant cell growth.
As used herein, the term “alkyl,” by itself or as part of another substituent, refers to a straight or branched, saturated, aliphatic radical having the number of carbon atoms indicated. Alkyl can include any number of carbons, such as C1-2, C1-3, C1-4, C1-5, C1-6, C1-7, C1-8, C1-9, C1-10, C2-3, C2-4, C2-5, C2-6, C3-4, C3-5, C3-6, C4-5, C4-6, and C5-6. For example, C1-6 alkyl includes, but is not limited to, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, hexyl, etc. Alkyl can also refer to alkyl groups having up to 20 carbons atoms, such as, but not limited to heptyl, octyl, nonyl, decyl, etc. Alkyl groups can be substituted or unsubstituted. Unless otherwise specified, “substituted alkyl” groups may be substituted with one or more groups selected from halo, hydroxy, amino, alkylamino, amido, acyl, nitro, cyano, and alkoxy.
As used herein, the term “alkoxy,” by itself or as part of another substituent, refers to a group having the formula —OR, wherein R is alkyl as described above.
As used herein, the term “alkenyl,” by itself or as part of another substituent, refers to a straight chain or branched hydrocarbon having at least 2 carbon atoms and at least one double bond. Alkenyl can include any number of carbons, such as C2, C2-3, C2-4, C2-5, C2-6, C2-7, C2-8, C2-9, C2-10, C3, C3-4, C3-5, C3-6, C4, C4-5, C4-6, C5, C5-6, and C6. Alkenyl groups can have any suitable number of double bonds, including, but not limited to, 1, 2, 3, 4, 5 or more.
Examples of alkenyl groups include, but are not limited to, vinyl (ethenyl), propenyl, isopropenyl, 1-butenyl, 2-butenyl, isobutenyl, butadienyl, 1-pentenyl, 2-pentenyl, isopentenyl, 1,3-pentadienyl, 1,4-pentadienyl, 1-hexenyl, 2-hexenyl, 3-hexenyl, 1,3-hexadienyl, 1,4-hexadienyl, 1,5-hexadienyl, 2,4-hexadienyl, or 1,3,5-hexatrienyl. Alkenyl groups can be substituted or unsubstituted. Unless otherwise specified, “substituted alkenyl” groups may be substituted with one or more moieties selected from halo, hydroxy, amino, alkylamino, alkoxy, haloalkyl, carboxy, amido, nitro, oxo, and cyano.
As used herein, the term “alkynyl,” by itself or as part of another substituent, refers to either a straight chain or branched hydrocarbon having at least 2 carbon atoms and at least one triple bond. Alkynyl can include any number of carbons, such as C2, C2-3, C2-4, C2-5, C2-6, C2-7, C2-8, C2-9, C2-10, C3, C3-4, C3-8, C3-6, C4, C4-8, C4-6, C5, C5-6, and C6. Examples of alkynyl groups include, but are not limited to, acetylenyl, propynyl, 1-butynyl, 2-butynyl, isobutynyl, sec-butynyl, butadiynyl, 1-pentynyl, 2-pentynyl, isopentynyl, 1,3-pentadiynyl, 1,4-pentadiynyl, 1-hexynyl, 2-hexynyl, 3-hexynyl, 1,3-hexadiynyl, 1,4-hexadiynyl, 1,5-hexadiynyl, 2,4-hexadiynyl, or 1,3,5-hexatriynyl. Alkynyl groups can be substituted or unsubstituted. Unless otherwise specified, “substituted alkynyl” groups may be substituted with one or more moieties selected from halo, hydroxy, amino, alkylamino, alkoxy, haloalkyl, carboxy, amido, nitro, oxo, and cyano.
As used herein, the terms “halo” and “halogen” refer to fluorine, chlorine, bromine and iodine.
As used herein, the term “haloalkyl,” by itself or as part of another substituent, refers to an alkyl group where some or all of the hydrogen atoms are replaced with halogen atoms. As for alkyl groups, haloalkyl groups can have any suitable number of carbon atoms, such as C1-6. For example, haloalkyl includes trifluoromethyl, fluoromethyl, etc. In some instances, the term “perfluoro” can be used to define a compound or radical where all the hydrogens are replaced with fluorine. For example, perfluoromethyl refers to 1,1,1-trifluoromethyl.
As used herein, the term “hydroxy” refers to the moiety —OH.
As used herein, the term “oxo” refers to an oxygen atom that is double-bonded to a compound (i.e., O═).
As used herein, the term “amino” refers to a moiety —NR2, wherein each R group is H or alkyl. An amino moiety can be ionized to form the corresponding ammonium cation. “Alkylamino” refers to an amino moiety wherein at least one of the R groups is alkyl.
As used herein, the term “α-aminoacyl” refers to a moiety —C(O)CNR′R″, wherein R′ and R″ are independently hydrogen, alkyl, alkynyl, aryl, heteroaryl, cycloaclkyl, or heterocyclyl, each of which is optionally substituted with one or more substituents selected from halo, hydroxy, amino, alkylamino, amido, acyl, nitro, cyano, and alkoxy.
As used herein, the term “aryl,” by itself or as part of another substituent, refers to an aromatic ring system having any suitable number of carbon ring atoms and any suitable number of rings. Aryl groups can include any suitable number of carbon ring atoms, such as C6, C7, C8, C9, C10, C11, C12, C13, C14, C15 or C16, as well as C6-10, C6-12, or C6-14. Aryl groups can be monocyclic, fused to form bicyclic (e.g., benzocyclohexyl) or tricyclic groups, or linked by a bond to form a biaryl group. Representative aryl groups include phenyl, naphthyl and biphenyl. Other aryl groups include benzyl, having a methylene linking group. Some aryl groups have from 6 to 12 ring members, such as phenyl, naphthyl or biphenyl. Other aryl groups have from 6 to 10 ring members, such as phenyl or naphthyl. Some other aryl groups have 6 ring members, such as phenyl. Aryl groups can be substituted or unsubstituted. Unless otherwise specified, “substituted aryl” groups can be substituted with one or more groups selected from halo, hydroxy, amino, alkylamino, amido, acyl, nitro, cyano, and alkoxy.
As used herein, the term “heteroaryl,” by itself or as part of another substituent, refers to a monocyclic or fused bicyclic or tricyclic aromatic ring assembly containing 5 to 16 ring atoms, where from 1 to 5 of the ring atoms are a heteroatom such as N, O or S. Additional heteroatoms can also be useful, including, but not limited to, B, Al, Si and P. The heteroatoms can be oxidized to form moieties such as, but not limited to, —S(O)— and —S(O)2—. Heteroaryl groups can include any number of ring atoms, such as C5-6, C3-8, C4-8, C5-8, C6-8, C3-9, C3-10, C3-11, or C3-12, wherein at least one of the carbon atoms is replaced by a heteroatom. Any suitable number of heteroatoms can be included in the heteroaryl groups, such as 1, 2, 3, 4; or 5, or 1 to 2, 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4, 2 to 5, 3 to 4, or 3 to 5. For example, heteroaryl groups can be C5-6 heteroaryl, wherein 1 to 4 carbon ring atoms are replaced with heteroatoms; or C5-6 heteroaryl, wherein 1 to 3 carbon ring atoms are replaced with heteroatoms; or C5-6 heteroaryl, wherein 1 to 4 carbon ring atoms are replaced with heteroatoms; or C5-6 heteroaryl, wherein 1 to 3 carbon ring atoms are replaced with heteroatoms. The heteroaryl group can include groups such as pyrrole, pyridine, imidazole, pyrazole, triazole, tetrazole, pyrazine, pyrimidine, pyridazine, triazine (1,2,3-, 1,2,4- and 1,3,5-isomers), thiophene, furan, thiazole, isothiazole, oxazole, and isoxazole. The heteroaryl groups can also be fused to aromatic ring systems, such as a phenyl ring, to form members including, but not limited to, benzopyrroles such as indole and isoindole, benzopyridines such as quinoline and isoquinoline, benzopyrazine (quinoxaline), benzopyrimidine (quinazoline), benzopyridazines such as phthalazine and cinnoline, benzothiophene, and benzofuran. Other heteroaryl groups include heteroaryl rings linked by a bond, such as bipyridine. Heteroaryl groups can be substituted or unsubstituted. Unless otherwise specified, “substituted heteroaryl” groups can be substituted with one or more groups selected from halo, hydroxy, amino, alkylamino, amido, acyl, nitro, cyano, and alkoxy.
The heteroaryl groups can be linked via any position on the ring. For example, pyrrole includes 1-, 2- and 3-pyrrole, pyridine includes 2-, 3- and 4-pyridine, imidazole includes 1-, 2-, 4- and 5-imidazole, pyrazole includes 1-, 3-, 4- and 5-pyrazole, triazole includes 1-, 4- and 5-triazole, tetrazole includes 1- and 5-tetrazole, pyrimidine includes 2-, 4-, 5- and 6-pyrimidine, pyridazine includes 3- and 4-pyridazine, 1,2,3-triazine includes 4- and 5-triazine, 1,2,4-triazine includes 3-, 5- and 6-triazine, 1,3,5-triazine includes 2-triazine, thiophene includes 2- and 3-thiophene, furan includes 2- and 3-furan, thiazole includes 2-, 4- and 5-thiazole, isothiazole includes 3-, 4- and 5-isothiazole, oxazole includes 2-, 4- and 5-oxazole, isoxazole includes 3-, 4- and 5-isoxazole, indole includes 1-, 2- and 3-indole, isoindole includes 1- and 2-isoindole, quinoline includes 2-, 3- and 4-quinoline, isoquinoline includes 1-, 3- and 4-isoquinoline, quinazoline includes 2- and 4-quinazoline, cinnoline includes 3- and 4-cinnoline, benzothiophene includes 2- and 3-benzothiophene, and benzofuran includes 2- and 3-benzofuran.
Some heteroaryl groups include those having from 5 to 10 ring members and from 1 to 3 ring atoms including N, O or S, such as pyrrole, pyridine, imidazole, pyrazole, triazole, pyrazine, pyrimidine, pyridazine, triazine (1,2,3-, 1,2,4- and 1,3,5-isomers), thiophene, furan, thiazole, isothiazole, oxazole, isoxazole, indole, isoindole, quinoline, isoquinoline, quinoxaline, quinazoline, phthalazine, cinnoline, benzothiophene, and benzofuran. Other heteroaryl groups include those having from 5 to 8 ring members and from 1 to 3 heteroatoms, such as pyrrole, pyridine, imidazole, pyrazole, triazole, pyrazine, pyrimidine, pyridazine, triazine (1,2,3-, 1,2,4- and 1,3,5-isomers), thiophene, furan, thiazole, isothiazole, oxazole, and isoxazole. Some other heteroaryl groups include those having from 9 to 12 ring members and from 1 to 3 heteroatoms, such as indole, isoindole, quinoline, isoquinoline, quinoxaline, quinazoline, phthalazine, cinnoline, benzothiophene, benzofuran and bipyridine. Still other heteroaryl groups include those having from 5 to 6 ring members and from 1 to 2 ring atoms including N, O or S, such as pyrrole, pyridine, imidazole, pyrazole, pyrazine, pyrimidine, pyridazine, thiophene, furan, thiazole, isothiazole, oxazole, and isoxazole.
Some heteroaryl groups include from 5 to 10 ring members and only nitrogen heteroatoms, such as pyrrole, pyridine, imidazole, pyrazole, triazole, pyrazine, pyrimidine, pyridazine, triazine (1,2,3-, 1,2,4- and 1,3,5-isomers), indole, isoindole, quinoline, isoquinoline, quinoxaline, quinazoline, phthalazine, and cinnoline. Other heteroaryl groups include from 5 to 10 ring members and only oxygen heteroatoms, such as furan and benzofuran. Some other heteroaryl groups include from 5 to 10 ring members and only sulfur heteroatoms, such as thiophene and benzothiophene. Still other heteroaryl groups include from 5 to 10 ring members and at least two heteroatoms, such as imidazole, pyrazole, triazole, pyrazine, pyrimidine, pyridazine, triazine (1,2,3-, 1,2,4- and 1,3,5-isomers), thiazole, isothiazole, oxazole, isoxazole, quinoxaline, quinazoline, phthalazine, and cinnoline.
As used herein, the term “cycloalkyl,” by itself or as part of another substituent, refers to a saturated or partially unsaturated, monocyclic, fused bicyclic or bridged polycyclic ring assembly containing from 3 to 12 ring atoms, or the number of atoms indicated. Cycloalkyl can include any number of carbons, such as C3-6, C4-6, C5-6, C3-8, C4-8, C5-8, C6-8, C3-9, C3-10, C3-11, and C3-12. Saturated monocyclic cycloalkyl rings include, for example, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, and cyclooctyl. Saturated bicyclic and polycyclic cycloalkyl rings include, for example, norbornane, [2.2.2] bicyclooctane, decahydronaphthalene and adamantane. Cycloalkyl groups can also be partially unsaturated, having one or more double or triple bonds in the ring. Representative cycloalkyl groups that are partially unsaturated include, but are not limited to, cyclobutene, cyclopentene, cyclohexene, cyclohexadiene (1,3- and 1,4-isomers), cycloheptene, cycloheptadiene, cyclooctene, cyclooctadiene (1,3-, 1,4- and 1,5-isomers), norbornene, and norbornadiene. When cycloalkyl is a saturated monocyclic C3-6 cycloalkyl, exemplary groups include, but are not limited to cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl and cyclooctyl. When cycloalkyl is a saturated monocyclic C3-6 cycloalkyl, exemplary groups include, but are not limited to cyclopropyl, cyclobutyl, cyclopentyl, and cyclohexyl. Cycloalkyl groups can be substituted or unsubstituted. Unless otherwise specified, “substituted cycloalkyl” groups can be substituted with one or more groups selected from halo, hydroxy, amino, alkylamino, amido, acyl, nitro, cyano, and alkoxy.
As used herein the term “heterocyclyl,” by itself or as part of another substituent, refers to a saturated ring system having from 3 to 12 ring members and from 1 to 4 heteroatoms of N, O and S. Additional heteroatoms can also be useful, including, but not limited to, B, Al, Si and P. The heteroatoms can be oxidized to form moieties such as, but not limited to, —S(O)— and —S(O)2—. Heterocyclyl groups can include any number of ring atoms, such as, C3-6, C4-6, C5-6, C3-8, C4-8, C5-8, C6-8, C3-9, C3-10, C3-11, or C3-12, wherein at least one of the carbon atoms is replaced by a heteroatom. Any suitable number of carbon ring atoms can be replaced with heteroatoms in the heterocyclyl groups, such as 1, 2, 3, or 4, or 1 to 2, 1 to 3, 1 to 4, 2 to 3, 2 to 4, or 3 to 4. The heterocyclyl group can include groups such as aziridine, azetidine, pyrrolidine, piperidine, azepane, azocane, quinuclidine, pyrazolidine, imidazolidine, piperazine (1,2-, 1,3- and 1,4-isomers), oxirane, oxetane, tetrahydrofuran, oxane (tetrahydropyran), oxepane, thiirane, thietane, thiolane (tetrahydrothiophene), thiane (tetrahydrothiopyran), oxazolidine, isoxazolidine, thiazolidine, isothiazolidine, dioxolane, dithiolane, morpholine, thiomorpholine, dioxane, or dithiane. The heterocyclyl groups can also be fused to aromatic or non-aromatic ring systems to form members including, but not limited to, indoline. Heterocyclyl groups can be unsubstituted or substituted. Unless otherwise specified, “substituted heterocyclyl” groups can be substituted with one or more groups selected from halo, hydroxy, amino, oxo (═O), alkylamino, amido, acyl, nitro, cyano, and alkoxy.
The heterocyclyl groups can be linked via any position on the ring. For example, aziridine can be 1- or 2-aziridine, azetidine can be 1- or 2-azetidine, pyrrolidine can be 1-, 2- or 3-pyrrolidine, piperidine can be 1-, 2-, 3- or 4-piperidine, pyrazolidine can be 1-, 2-, 3-, or 4-pyrazolidine, imidazolidine can be 1-, 2-, 3- or 4-imidazolidine, piperazine can be 1-, 2-, 3- or 4-piperazine, tetrahydrofuran can be 1- or 2-tetrahydrofuran, oxazolidine can be 2-, 3-, 4- or 5-oxazolidine, isoxazolidine can be 2-, 3-, 4- or 5-isoxazolidine, thiazolidine can be 2-, 3-, 4- or 5-thiazolidine, isothiazolidine can be 2-, 3-, 4- or 5-isothiazolidine, and morpholine can be 2-, 3- or 4-morpholine.
When heterocyclyl includes 3 to 8 ring members and 1 to 3 heteroatoms, representative members include, but are not limited to, pyrrolidine, piperidine, tetrahydrofuran, oxane, tetrahydrothiophene, thiane, pyrazolidine, imidazolidine, piperazine, oxazolidine, isoxazolidine, thiazolidine, isothiazolidine, morpholine, thiomorpholine, dioxane and dithiane. Heterocyclyl can also form a ring having 5 to 6 ring members and 1 to 2 heteroatoms, with representative members including, but not limited to, pyrrolidine, piperidine, tetrahydrofuran, tetrahydrothiophene, pyrazolidine, imidazolidine, piperazine, oxazolidine, isoxazolidine, thiazolidine, isothiazolidine, and morpholine.
As used herein, the term “amido” refers to a moiety —NRC(O)R or —C(O)NR2, wherein each R group is H or alkyl.
As used herein, the term “acyl” refers to the moiety —C(O)R, wherein each R group is alkyl.
As used herein, the term “nitro” refers to the moiety —NO2.
As used herein, the term “cyano” refers to a carbon atom triple-bonded to a nitrogen atom (i.e., the moiety —C≡N).
As used herein, the term “carboxy” refers to the moiety —C(O)OH.
As used herein, the term “salt” refers to an acid salt or base salt of an active agent such as an androgen receptor inhibitor or an AKR1C3 inhibitor. Acid salts of basic active agents include mineral acid salts (e.g., salts formed by using hydrochloric acid, hydrobromic acid, phosphoric acid, and the like), organic acid salts (e.g., salts formed using acetic acid, propionic acid, glutamic acid, citric acid, and the like), and quaternary ammonium salts (e.g., salts formed via reaction of an amine with methyl iodide, ethyl iodide, or the like). It is understood that the pharmaceutically acceptable salts are non-toxic.
Acidic active agents may be contacted with bases to provide base salts such as alkali and alkaline earth metal salts, such as sodium, lithium, potassium, calcium, magnesium, as well as ammonium salts, such as ammonium, trimethyl-ammonium, diethylammonium, and tris-(hydroxymethyl)-methyl-ammonium salts.
The neutral forms of the active agents can be regenerated by contacting the salt with a base or acid and isolating the parent compound in the conventional manner if desired. In some embodiments, the parent form of the compound may differ from various salt forms in certain physical properties, such as solubility in polar solvents, but otherwise the salts forms may be equivalent to the parent form of the compound.
By “pharmaceutically acceptable,” it is meant that the excipient is compatible with the other ingredients of the formulation and is not deleterious to the recipient thereof. As used herein, the term “pharmaceutically acceptable excipient” refers to a substance that aids the administration of an active agent to a subject. Useful pharmaceutical excipients include, but are not limited to, binders, fillers, disintegrants, lubricants, glidants, coatings, sweeteners, flavors and colors.
As used herein, the terms “effective amount” and “therapeutically effective amount” refer to a dose of a compound such as androgen receptor inhibitor, an AKR1C3 inhibitor, or an antiandrogen that produces therapeutic effects for which it is administered. The exact dose will depend on the purpose of the treatment, and will be ascertainable by one skilled in the art using known techniques (see, e.g., Lieberman, Pharmaceutical Dosage Forms (vols. 1-3, 1992); Lloyd, The Art, Science and Technology ofPharmaceutical Compounding (1999); Pickar, Dosage Calculations (1999); Goodman & Gilman's The Pharmacological Basis of Therapeutics, 11th Edition, 2006, Brunton, Ed., McGraw-Hill; and Remington: The Science and Practice of Pharmacy, 21st Edition, 2005, Hendrickson, Ed., Lippincott, Williams & Wilkins).
As used herein, the term “cancer” is intended to include any member of a class of diseases characterized by the uncontrolled growth of aberrant cells. The term includes all known cancers and neoplastic conditions, whether characterized as malignant, benign, recurrent, soft tissue, or solid, and cancers of all stages and grades including advanced, recurrent, pre- and post-metastatic cancers. Additionally, the term includes androgen-independent, castrate-resistant, castration recurrent, hormone-resistant, drug-resistant, and metastatic castrate-resistant cancers. Examples of different types of cancer include, but are not limited to, prostate cancer (e.g., prostate adenocarcinoma); breast cancers (e.g., triple-negative breast cancer, ductal carcinoma in situ, invasive ductal carcinoma, tubular carcinoma, medullary carcinoma, mucinous carcinoma, papillary carcinoma, cribriform carcinoma, invasive lobular carcinoma, inflammatory breast cancer, lobular carcinoma in situ, Paget's disease, Phyllodes tumors); gynecological cancers (e.g., ovarian, cervical, uterine, vaginal, and vulvar cancers); lung cancers (e.g., non-small cell lung cancer, small cell lung cancer, mesothelioma, carcinoid tumors, lung adenocarcinoma); digestive and gastrointestinal cancers such as gastric cancer (e.g., stomach cancer), colorectal cancer, gastrointestinal stromal tumors (GIST), gastrointestinal carcinoid tumors, colon cancer, rectal cancer, anal cancer, bile duct cancer, small intestine cancer, and esophageal cancer; thyroid cancer; gallbladder cancer; liver cancer; pancreatic cancer; appendix cancer; renal cancer (e.g., renal cell carcinoma); cancer of the central nervous system (e.g., glioblastoma, neuroblastoma); skin cancer (e.g., melanoma); bone and soft tissue sarcomas (e.g., Ewing's sarcoma); lymphomas; choriocarcinomas; urinary cancers (e.g., urothelial bladder cancer); head and neck cancers; and bone marrow and blood cancers (e.g., chronic lymphocytic leukemia, lymphoma). As used herein, a “tumor” comprises one or more cancerous cells.
As used herein, the terms “antiandrogen” and “antiandrogen drug” refer to compounds that alter the androgen pathway by blocking the androgen receptors, competing for binding sites on the cell's surface, or affecting or mediating androgen production. Antiandrogens are useful for treating several diseases including, but not limited to, prostate cancer. Examples of antiandrogens include, but are not limited to, enzalutamide, abiraterone, bicalutamide, and darolutamide.
As used herein, the terms “about” and “around” indicate a close range around a numerical value when used to modify that specific value. If “X” were the value, for example, “about X” or “around X” would indicate a value from 0.9X to 1.1X, e.g., a value from 0.95X to 1.05X, or a value from 0.98X to 1.02X, or a value from 0.99X to 1.01X. Any reference to “about X” or “around X” specifically indicates at least the values X, 0.9X, 0.91X, 0.92X, 0.93X, 0.94X, 0.95X, 0.96X, 0.97X, 0.98X, 0.99X, 1.01X, 1.02X, 1.03X, 1.04X, 1.05X, 1.06X, 1.07X, 1.08X, 1.09X, and 1.1X, and values within this range.
Provided herein are compounds according to Formula I:
In some embodiments, if Z is —CH2— in the para position with respect to —OR4, subscript m and subscript n are 0, and R4 is H in compounds of Formula I, then at least one R3 is selected from the group consisting of halogen, —NO2, C2-8 alkyl, C1-8 alkoxy, C1-8 haloalkyl, C2-8 alkenyl, C2-8 alkynyl, and —N(Ra)2. In some such embodiments, subscript p may be 1, 2, 3, 4, or 5.
In some embodiments, if Z is —CH2— in the para position with respect to —OR4 and the compound is a 2,3,4-trihydroxy-benzamide in compounds of Formula I, then at least one R2 or at least one R3 is selected from the group consisting of —OH, —NO2, —CN, C1-8 alkoxy, C1-8 haloalkyl, C2-8 alkenyl, C2-8 alkynyl, and —N(Ra)2. In some such embodiments, subscript n may be 1, 2, or 3 and subscript p may be 1, 2, 3, 4, or 5.
In some embodiments, if Z is —CH2— in the para position with respect to —OR4 and the compound is a 5-alkyl-6-hydroxy-benzamide in compounds of Formula I, then at least one R2 or at least one R3 is selected from the group consisting of —OH, —NO2, —CN, C1-8 alkyl, C1-8 alkoxy, C1-8 haloalkyl, C2-8 alkenyl, C2-8 alkynyl, and —N(Ra)2. In some such embodiments, subscript n may be 1, 2, or 3 and subscript p may be 1, 2, 3, 4, or 5.
In some embodiments, if Z is —C(O)— in the para position with respect to —OR4 and the compound is a 2-hydroxy-benzamide, a 2,5-dialkyl-6-hydroxy-benzamide, or a 5-alkyl-6-hydroxy-benzamide in compounds of Formula I, then (i) at least one R2 or at least one R3 is selected from the group consisting of —OH, C1-8 alkoxy, C1-8 haloalkyl, C2-8 alkenyl, C2-8 alkynyl, and —N(Ra)2, and (ii) at least one R3 is other than —CF3 or —NO2 when subscript n is 1 and R2 is 4-chloro or 4-(n-butyl). In some such embodiments, subscript n may be 1, 2, or 3 and subscript p may be 1, 2, 3, 4, or 5.
In some embodiments, if Z is —S— in the para position with respect to —OR4 and the compound is a 2,5-dialkyl-6-hydroxy-benzamide or a 5-alkyl-6-hydroxy-benzamide in compounds of Formula I, then at least one R2 or at least one R3 is selected from the group consisting of —OH, C2-8 alkyl, C2-8 alkoxy, C2-8 alkenyl, C2-8 alkynyl, and —N(Ra)2. In some such embodiments, subscript n may be 1, 2, or 3 and subscript p may be 1, 2, 3, 4, or 5.
As used herein, the term “2,3,4-trihydroxy-benzamide” refers to a compound as shown below:
wherein R4 is H.
As used herein, the term “5-alkyl-6-hydroxy-benzamide” refers to a compound as shown below:
wherein R4 is H and R1b is C1-8 alkyl.
As used herein, the term “2-hydroxy-benzamide” refers to a compound as shown below:
wherein R4 is H.
As used herein, the term “2,5-dialkyl-6-hydroxy-benzamide” refers to a compound as shown below:
wherein R4 is H and R1b and R1e are C1-8 alkyl.
In some embodiments, compounds of Formula I are provided wherein: if Z is —C(O)— in the para position with respect to —OR4 and the compound is a 2-hydroxy-benzamide or a 5-alkyl-6-hydroxy-benzamide, subscript n is 1, and R2 is 4-chloro or 4-(n-butyl), then at least one R3 is other than —CF3 or —NO2.
In some embodiments, compounds of Formula I are provided wherein: if Z is —C(O)— in the para position with respect to —OR4 and the compound is a 2-hydroxy-benzamide or a 5-alkyl-6-hydroxy-benzamide, then the compound is other than 5-(4-butylbenzoyl)-2-hydroxy-N-[3-(trifluoromethyl)phenyl]-benzamide or 5-(4-chlorobenzoyl)-2-hydroxy-3-methyl-N-[4-nitro-2-(trifluoromethyl)phenyl]-benzamide.
In some embodiments, Z is —CH2—. In some embodiments, Z is —C(O)—. In some embodiments, Z is —O—.
In some embodiments, compounds of Formula I are provided wherein each R3 is independently selected from the group consisting of —OH, halogen, —NO2, —CN, C1-8 alkyl, C1-8 alkoxy, C1-8 haloalkyl, C2-8 alkenyl, and C2-8 alkynyl.
In some embodiments, compounds of Formula I are provided wherein each R3 is independently selected from the group consisting of C1-8 haloalkyl, halogen, and —NO2.
Also provided herein are compounds according to Formula IIa:
or a pharmaceutically acceptable salt thereof. In some embodiments, R3b and R3d are independently C1-8 haloalkyl in compounds of Formula IIa. R3b and R3d may independently be, e.g., chloromethyl, dichloromethyl, trichloromethyl, fluoromethyl, difluoromethyl, trifluoromethyl, 2,2,2-trichloroethyl, 2,2,2-trifluoroethyl, pentachloroethyl, pentafluoroethyl, 1,1,1,3,3,3-hexachloropropyl, 1,1,1,3,3,3-hexafluoropropyl, or the like. In some embodiments, R3b and R3d are independently selected from the group consisting of —CF3 and —CCl3.
Also provided herein are compounds according Formula IIb:
or a pharmaceutically acceptable salt thereof. In some embodiments, R3a and R3c are independently selected from the group consisting of halogen and —NO2 in compounds of Formula IIb. R3a and R3c may independently be fluoro, chloro, bromo, iodo, or —NO2. In some embodiments, R3a is —Cl and R3c is —NO2 in compounds of Formula IIb.
Also provided herein are compounds according to Formula IIc:
or a pharmaceutically acceptable salt thereof. In some embodiments, R3 is C1-8 haloalkyl. R3 may be, e.g., chloromethyl, dichloromethyl, trichloromethyl, fluoromethyl, difluoromethyl, trifluoromethyl, 2,2,2-trichloroethyl, 2,2,2-trifluoroethyl, pentachloroethyl, pentafluoroethyl, 1,1,1,3,3,3-hexachloropropyl, 1,1,1,3,3,3-hexafluoropropyl, or the like. In some embodiments, R3 is selected from the group consisting of —CF3 and —CCl3.
In some embodiments, R2 is selected from the group consisting of C1-8 alkyl, C1-8 alkoxy, and C1-8 haloalkyl in compounds of Formula, I, IIa, IIb, or IIc. In some embodiments, R2 is selected from the group consisting of C1-8 alkyl and C1-8 alkoxy, and R3 is C1-8 haloalkyl.
Provided herein are compounds according to Formula IIIa:
or a pharmaceutically acceptable salt thereof.
In some embodiments, R3b and R3d are independently C1-8 haloalkyl. R3b and R3d may independently be, e.g., chloromethyl, dichloromethyl, trichloromethyl, fluoromethyl, difluoromethyl, trifluoromethyl, 2,2,2-trichloroethyl, 2,2,2-trifluoroethyl, pentachloroethyl, pentafluoroethyl, 1,1,1,3,3,3-hexachloropropyl, 1,1,1,3,3,3-hexafluoropropyl, or the like. In some embodiments, R3b and R3d are independently selected from the group consisting of —CF3 and —CCl3. In some embodiments, R2 is selected from the group consisting of C1-8 alkyl, C1-8 alkoxy, and C1-8 haloalkyl.
Provided herein are compounds according to Formula IIIb:
or a pharmaceutically acceptable salt thereof.
In some embodiments, R3a and R3c are independently selected from the group consisting of halogen and —NO2. R3a and R3c may independently be fluoro, chloro, bromo, iodo, or —NO2. In some embodiments, R3a is —Cl and R3c is —NO2. In some such embodiments, R2 is selected from the group consisting of C1-8 alkyl, C1-8 alkoxy, and C1-8 haloalkyl.
Provided herein are compounds according to Formula IIIc:
or a pharmaceutically acceptable salt thereof.
In some embodiments, R2c is —OCH3 in compounds of Formula IIIa, IIIb, or IIIc.
In some embodiments Z is present in the para position with respect to —OR4 in compounds of Formula I, IIa, IIb, IIc, IIIa, IIIb, or IIIc.
In some embodiments Z is present in the ortho position with respect to —C(O)NH— in compounds of Formula I, IIa, IIb, IIc, IIIa, IIIb, or IIIc.
Also provided herein are compounds according to Formula IV, V, or VI:
wherein R1, R2, R3, R4, subscript m, subscript n, and subscript p are defined as described above. Compounds according to Formula IV, V, and VI may further contain one or more of the R2c, R3a, R3b, and R3c groups set forth above.
In some embodiments, R4 is H or α-aminoacyl in compounds of Formula I, IIa, IIb, IIc, IIIa, IIIb, IIIc, IV, V, and/or VI. In some embodiments R4 is selected from the group consisting of L-valinyl and D-valinyl in compounds of Formula I, IIa, IIb, IIc, IIIa, IIIb, IIIc, IV, V, and/or VI.
In some embodiments, compounds of Formula I, IIa, IIb, IIc, IIIa, IIIb, IIIc, IV, V, and/or VI are provided wherein subscript m is 0. In some embodiments, compounds of Formula I, IIa, IIb, IIc, IV, V, and/or VI are provided wherein subscript n is 1 or 2. In some embodiments, compounds of Formula I, IV, V, and/or VI are provided wherein subscript p is 1 or 2.
In some embodiments, the compound is:
and pharmaceutically acceptable salts thereof.
In some embodiments, compounds of Formula I are provided wherein:
In some embodiments, compounds of Formula I are provided wherein:
In some embodiments, compounds of Formula I are provided wherein:
In some embodiments, Z is —CH2—, subscript m is 0, subscript n is 0, subscript p is 1, and R3 is other than 2-hydroxy, 4-cyano, 3-methyl, and 4-methyl. In some embodiments, Z is —CH2—, subscript m is 1, R1 is 2-methyl, subscript n is 0, subscript p is 2, a first R3 is 2-chloro, and a second R3 is other than 4-chloro. In some embodiments, Z is —CH2—, subscript m is 2, a first R1 is 2-hydroxy, a second R1 is 3-hydroxy, subscript n is 1, R2 is 2-isopropyl, subscript p is 1, and R3 is other than 2-chloro.
In some embodiments, Z is —S—, and the compound is other than a 2,5-dialkyl-6-hydroxy-2-methyl-benzamide or a 5-alkyl-6-hydroxy-benzamide. In some embodiments, Z is —C(O)—, and the compound is other than a 2-hydroxy-benzamide, a 2,5-dialkyl-5-hydroxy-benzamide, or a 5-alkyl-6-hydroxy-benzamide. In some embodiments, each R3 is independently selected from the group consisting of —OH, halogen, —NO2, —CN, C1-8 alkyl, C1-8 alkoxy, C1-8 haloalkyl, C2-8 alkenyl, and C2-8 alkynyl.
The compounds may be prepared using the methods disclosed herein and routine modifications thereof, which will be apparent given the disclosure herein and methods well known in the art. Synthetic routes may employ starting materials that are commercially available or those that can be prepared according to known methods, including those described in Fiesers' Reagents for Organic Synthesis Volumes 1-28 (John Wiley & Sons, 2016), by March (Advanced Organic Chemistry 6th Ed. John Wiley & Sons, 2007), and by Larock (Comprehensive Organic Transformations 3rd Ed. John Wiley & Sons, 2018). The synthesis of typical compounds described herein may be accomplished as described in the following examples. It will be appreciated that where typical or preferred process conditions (i.e., reaction temperatures, times, mole ratios of reactants, solvents, pressures, etc.) are given, other process conditions can also be used unless otherwise stated. Optimum reaction conditions may vary with the particular reactants or solvent used, but such conditions can be determined by one skilled in the art by routine optimization procedures. Additionally, as will be apparent to those skilled in the art, conventional protecting groups may be advantageous for preventing certain functional groups from undergoing undesired reactions. Suitable protecting groups for various functional groups as well as suitable conditions for protecting and deprotecting particular functional groups are well known in the art. For example, numerous protecting groups are described in Green and Wuts (Protective Groups in Organic Synthesis, 4th Ed. 2007, Wiley-Interscience, New York) and references cited therein.
Also provided herein are pharmaceutical compositions comprising one or more AR/AKR1C3 inhibitors (e.g., one or more compounds according to Formula I, IIa, IIb, IIc, IIIa, IIIb, or IIIc as described above, or pharmaceutically acceptable salts thereof) and a pharmaceutically acceptable excipient.
The pharmaceutical compositions can be prepared by any of the methods well known in the art of pharmacy and drug delivery (see, e.g., Lieberman, Pharmaceutical Dosage Forms (vols. 1-3, 1992); Lloyd, The Art, Science and Technology ofPharmaceutical Compounding (1999); and Remington: The Science and Practice of Pharmacy, 21st Edition, 2005, Hendrickson, Ed., Lippincott, Williams & Wilkins). In general, methods of preparing the compositions include the step of bringing one or more AR/AKR1C3 inhibitors into association with a carrier containing one or more accessory ingredients. The pharmaceutical compositions may be prepared, for example, by uniformly and intimately bringing the active ingredient into association with a liquid carrier or a finely divided solid carrier or both, and then, if necessary, shaping the product into the desired formulation. The compositions can be conveniently prepared and/or packaged in unit dosage form. Pharmaceutically acceptable carriers include any of the standard pharmaceutical carriers, buffers and excipients, including phosphate-buffered saline solution, water, and emulsions (such as an oil/water or water/oil emulsion), and various types of wetting agents and/or adjuvants. Preferred pharmaceutical carriers will depend, in part, upon the intended mode of administration of the active agent.
The pharmaceutical compositions can include a combination of drugs, e.g., compounds according to Formula I, IIa, IIb, IIc, IIIa, IIIb, or IIIc, an combinations thereof, in combination with additional agents such as antiandrogen drugs (including but not limited to enzalutamide, abiraterone, bicalutamide, darolutamide, apalutamide, and the like).
The pharmaceutical compositions include those suitable for topical, parenteral, pulmonary, nasal, rectal, or oral administration. The most suitable route of administration in any given case will depend in part on the nature and severity of the condition being treated (e.g., prostate, breast, ovarian, or liver cancer, and particular stages thereof).
Other pharmaceutical compositions include those suitable for systemic (enteral or parenteral) administration. Systemic administration includes oral, rectal, sublingual, or sublabial administration. Parenteral administration includes, e.g., intravenous, intramuscular, intra-arteriole, intradermal, subcutaneous, intraperitoneal, intraventricular, and intracranial. Other modes of delivery include, but are not limited to, the use of liposomal formulations, intravenous infusion, transdermal patches, etc. In particular embodiments, pharmaceutical compositions may be administered intratumorally.
Compositions for pulmonary administration include, but are not limited to, dry powder compositions consisting of the powder of a compound described herein, or a salt thereof, and the powder of a suitable carrier and/or lubricant. The compositions for pulmonary administration can be inhaled from any suitable dry powder inhaler device known to a person skilled in the art.
The pharmaceutical compositions may be in a form suitable for oral use. Suitable compositions for oral administration include, but are not limited to, tablets, troches, lozenges, aqueous or oily suspensions, dispersible powders or granules, emulsions, hard or soft capsules, syrups, elixirs, solutions, buccal patches, oral gels, chewing gums, chewable tablets, effervescent powders, and effervescent tablets. Such compositions can contain one or more agents selected from sweetening agents, flavoring agents, coloring agents, antioxidants, and preserving agents in order to provide pharmaceutically elegant and palatable preparations.
Tablets generally contain the active ingredients in admixture with non-toxic pharmaceutically acceptable excipients, including: inert diluents, such as cellulose, silicon dioxide, aluminum oxide, calcium carbonate, sodium carbonate, glucose, mannitol, sorbitol, lactose, calcium phosphate, and sodium phosphate; granulating and disintegrating agents, such as corn starch and alginic acid; binding agents, such as polyvinylpyrrolidone (PVP), cellulose, polyethylene glycol (PEG), starch, gelatin, and acacia; and lubricating agents such as magnesium stearate, stearic acid, and talc. The tablets can be uncoated or coated, enterically or otherwise, by known techniques to delay disintegration and absorption in the gastrointestinal tract and thereby provide a sustained action over a longer period. For example, a time delay material such as glyceryl monostearate or glyceryl distearate can be employed. Tablets can also be coated with a semi-permeable membrane and optional polymeric osmogents according to known techniques to form osmotic pump compositions for controlled release. Compositions for oral administration can be formulated as hard gelatin capsules wherein the active ingredient is mixed with an inert solid diluent (such as calcium carbonate, calcium phosphate, or kaolin), or as soft gelatin capsules wherein the active ingredients are mixed with water or an oil medium (such as peanut oil, liquid paraffin, or olive oil).
The pharmaceutical compositions can also be in the form of an injectable aqueous or oleaginous solution or suspension. Sterile injectable preparations can be formulated using non-toxic parenterally-acceptable vehicles including water, Ringer's solution, and isotonic sodium chloride solution, and acceptable solvents such as 1,3-butane diol. In addition, sterile, fixed oils are conventionally employed as a solvent or suspending medium. For this purpose any bland fixed oil can be employed including synthetic mono- or diglycerides. In addition, fatty acids such as oleic acid find use in the preparation of injectables.
Aqueous suspensions contain the active agents in admixture with excipients suitable for the manufacture of aqueous suspensions. Such excipients include, but are not limited to: suspending agents such as sodium carboxymethylcellulose, methylcellulose, oleagino-propylmethylcellulose, sodium alginate, polyvinyl-pyrrolidone, gum tragacanth and gum acacia; dispersing or wetting agents such as lecithin, polyoxyethylene stearate, and polyethylene sorbitan monooleate; and preservatives such as ethyl, n-propyl, and p-hydroxybenzoate. Oily suspensions can be formulated by suspending the active ingredients in a vegetable oil, for example, arachis oil, olive oil, sesame oil or coconut oil, or in a mineral oil such as liquid paraffin. The oily suspensions can contain a thickening agent, for example beeswax, hard paraffin, or cetyl alcohol. These compositions can be preserved by the addition of an anti-oxidant such as ascorbic acid. Dispersible powders and granules (suitable for preparation of an aqueous suspension by the addition of water) can contain the active ingredients in admixture with a dispersing agent, wetting agent, suspending agent, or combinations thereof. Additional excipients can also be present.
The pharmaceutical compositions can also be in the form of oil-in-water emulsions.
The oily phase can be a vegetable oil, for example olive oil or arachis oil, or a mineral oil, for example liquid paraffin or mixtures of these. Suitable emulsifying agents can be naturally-occurring gums, such as gum acacia or gum tragacanth; naturally-occurring phospholipids, such as soy lecithin; esters or partial esters derived from fatty acids and hexitol anhydrides, such as sorbitan monooleate; and condensation products of said partial esters with ethylene oxide, such as polyoxyethylene sorbitan monooleate.
Transdermal delivery can be accomplished by means of iontophoretic patches and the like. The active ingredients can also be administered in the form of suppositories for rectal administration of the drug. These compositions can be prepared by mixing the active agents with a suitable non-irritating excipient which is solid at ordinary temperatures but liquid at the rectal temperature and will therefore melt in the rectum to release the drug. Such materials include cocoa butter and polyethylene glycols.
Controlled release parenteral formulations of the compositions can be made as implants, oily injections, or as particulate systems. For a broad overview of delivery systems see Banga, A. J., THERAPEUTIC PEPTIDES AND PROTEINS: FORMULATION, PROCESSING, AND DELIVERY SYSTEMS, Technomic Publishing Company, Inc., Lancaster, Pa., (1995) incorporated herein by reference. Particulate systems include microspheres, microparticles, microcapsules, nanocapsules, nanospheres, and nanoparticles.
Polymers can be used for ion-controlled release of active agents. Various degradable and nondegradable polymeric matrices for use in controlled drug delivery are known in the art (Langer R., Accounts Chem. Res., 26:537-542 (1993)). For example, the block copolymer, polaxamer 407 exists as a viscous yet mobile liquid at low temperatures but forms a semisolid gel at body temperature. It has shown to be an effective vehicle for formulation and sustained delivery of recombinant interleukin 2 and urease (Johnston et al., Pharm. Res., 9:425-434 (1992); and Pec et al., J. Parent. Sci. Tech., 44(2):58 65 (1990)). Alternatively, hydroxyapatite has been used as a microcarrier for controlled release of proteins (Ijntema et al., Int. J. Pharm., 112:215-224 (1994)). In yet another aspect, liposomes are used for controlled release as well as drug targeting of the lipid-capsulated drug (Betageri et al., LIPOSOME DRUG DELIVERY SYSTEMS, Technomic Publishing Co., Inc., Lancaster, Pa. (1993)). Numerous additional systems for controlled delivery of therapeutic proteins are known. See, e.g., U.S. Pat. Nos. 5,055,303, 5,188,837, 4,235,871, 4,501,728, 4,837,028 4,957,735 and U.S. Pat. Nos. 5,019,369, 5,055,303; 5,514,670; 5,413,797; 5,268,164; 5,004,697; 4,902,505; 5,506,206, 5,271,961; 5,254,342 and 5,534,496, each of which is incorporated herein by reference.
Also provided herein are methods for treating an androgen-mediated disease or condition comprising administering to a subject in need thereof a therapeutically effective amount of a compound according to any one of Formula I, IIa, IIb, IIc, IIIa, IIIb, or IIIc or a pharmaceutically acceptable salt thereof, or a therapeutically effective amount of a pharmaceutically acceptable composition as described above, thereby treating the hormone-mediated disease or condition.
In some embodiments, the hormone-mediated disease is a cancer. The cancer may be, for example, an androgen-independent cancer, a metastatic cancer, a castrate-resistant cancer, a castration recurrent cancer, a hormone-resistant cancer, a metastatic castrate-resistant cancer, or a combination thereof. Compounds according to the present disclosure can be used for treating carcinomas of the breast, prostate, endometrium, or kidney, as well as hepatocellular carcinoma, bladder cancers, renal cancers, gastric cancers, cervical cancers, colon cancers, and lung cancers (e.g., non-small cell lung cancer; NSCLC). These and other cancers are known to express AKR1C3. See, e.g., Guise et al. Cancer Res 2010 (70) (4) 1573-1584. In some embodiments, the cancer is prostate cancer, breast cancer, ovarian cancer, or liver cancer.
In some embodiments, the method includes administering an antiandrogen agent to the subject. The antiandrogen agent is selected from the group consisting of enzalutamide, apalutamide, darolutamide, abiraterone, pharmaceutically acceptable salts thereof, and combinations thereof.
The compounds and/or pharmaceutical compositions as described herein can be administered at any suitable dose in the methods. In general, the compound and/or composition is administered at a dose ranging from about 0.1 milligrams to about 1000 milligrams per kilogram of a subject's body weight (i.e., about 0.1-1000 mg/kg). In some embodiments, the compound and/or composition is administered at a dose ranging from about 1 milligram to about 100 milligrams per kilogram of a subject's body weight (i.e., about 1-100 mg/kg). The dose can be, for example, about 0.1-1000 mg/kg, or about 1-10 mg/kg, or about 10-50 mg/kg, or about 25-50 mg/kg, or about 50-75 mg/kg, or about 1-75-100 mg/kg, or about 1-500 mg/kg, or about 25-250 mg/kg, or about 50-100 mg/kg. The dose can be about 1, 2, 3, 4, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950 or 1000 mg/kg. The dosages can be varied depending upon the requirements of the patient, the severity of the disorder being treated, and the particular formulation being administered. The dose administered to a patient should be sufficient to result in a beneficial therapeutic response in the patient. The size of the dose will also be determined by the existence, nature, and extent of any adverse side-effects that accompany the administration of the drug in a particular patient. Determination of the proper dosage for a particular situation is within the skill of the typical practitioner. The total dosage can be divided and administered in portions over a period of time suitable to treat to the cancer or other disease/condition.
The compounds and/or compositions can be administered for periods of time which will vary depending upon the nature of the particular disorder, its severity, and the overall condition of the subject to whom the compounds and/or compositions are administered.
Administration can be conducted, for example, hourly, every 2 hours, three hours, four hours, six hours, eight hours, or twice daily including every 12 hours, or any intervening interval thereof. Administration can be conducted once daily, or once every 36 hours or 48 hours, or once every month or several months. Following treatment, a subject can be monitored for changes in his or her condition and for alleviation of the symptoms of the disorder. The dosage can either be increased in the event the subject does not respond significantly to a particular dosage level, or the dose can be decreased if an alleviation of the symptoms of the disorder is observed, or if the disorder has been remedied, or if unacceptable side effects are seen with a particular dosage. A therapeutically effective amount can be administered to the subject in a treatment regimen comprising intervals of at least 1 hour, or 6 hours, or 12 hours, or 24 hours, or 36 hours, or 48 hours between dosages. Administration can be conducted at intervals of at least 72, 96, 120, 144, 168, 192, 216, or 240 hours (i.e., 3, 4, 5, 6, 7, 8, 9, or 10 days).
In some embodiments, the methods further include administration of one or more additional anti-cancer agents. Examples of anti-cancer agents include, but are not limited to, chemotherapeutic agents (e.g., carboplatin, paclitaxel, pemetrexed, or the like), tyrosine kinase inhibitors (e.g., erlotinib, crizotinib, osimertinib, or the like), poly (ADP-ribose) polymerase inhibitors (e.g., olaparib, rucaparib, and the like), and immunotherapeutic agents (e.g., pembrolizumab, nivolumab, durvalumab, atezolizumab, or the like). In some embodiments, the methods include administration of radiotherapy, e.g., external beam radiation; intensity modulated radiation therapy (IMRT); brachytherapy (internal or implant radiation therapy); stereotactic body radiation therapy (SBRT)/stereotactic ablative radiotherapy (SABR); stereotactic radiosurgery (SRS); or a combination of such techniques.
In some of these embodiments, the cancer is advanced stage cancer. In some of these embodiments, the cancer is drug resistant. In some of these embodiments, the cancer is antiandrogen drug resistant or androgen independent. In some of these embodiments, the cancer is metastatic. In some of these embodiments, the cancer is metastatic and drug resistant (e.g., antiandrogen drug resistant). In some of these embodiments, the cancer is castration resistant. In some of these embodiments, the cancer is metastatic and castration resistant. In some of these embodiments, the cancer is enzalutamide resistant. In some of these embodiments, the cancer is enzalutamide and arbiraterone resistant. In some of these embodiments, the cancer is enzalutamide, arbiraterone, darolutamide, and bicalutamide resistant. In some of these embodiments, the cancer is enzalutamide, arbiraterone, bicalutamide, darolutamide, and apalutamide resistant. In other embodiments, the cancer is resistant (e.g., docetaxel, cabazitaxel, paclitaxel). The cancer (e.g., prostate, breast, ovarian, or liver cancer) can be resistant to any combination of these drugs.
In some embodiments, treatment comprises inhibiting cancer cell (e.g., prostate, breast, ovarian, or liver cancer cell) growth, inhibiting cancer cell proliferation, inhibiting cancer cell migration, inhibiting cancer cell invasion, ameliorating the symptoms of cancer, reducing the size of a cancer tumor, reducing the number of cancer tumors, reducing the number of cancer cells, inducing cancer cell necrosis, pyroptosis, oncosis, apoptosis, autophagy, or other cell death, or enhancing the therapeutic effects of a composition or pharmaceutical composition comprising a AR/AKR1C3 inhibitor. In particular instances, the subject does not have cancer.
In particular methods of treating cancer (e.g., prostate cancer, breast cancer, ovarian cancer, liver cancer, androgen-independent cancer, or drug-resistant cancer), described herein, treatment comprises enhancing the therapeutic effects of an antiandrogen drug (e.g., a non-steroidal adrogen recept antagonist or a CYP17A1 inhibitor). In certain embodiments, treatment comprises enhancing the therapeutic effects of enzalutamide. In certain other embodiments, treatment comprises enhancing the therapeutic effects of abiraterone. In yet other embodiments, treatment comprises enhancing the therapeutic effects of apalutamide. In some other embodiments, treatment comprises enhancing the therapeutic effects of bicalutamide. The enhancement can be synergistic or additive.
In certain embodiments of the methods set forth herein, treatment comprises reversing, reducing, or decreasing cancer cell (e.g., prostate cancer cell, breast cancer cell, ovarian cancer cell, or liver cancer cell) resistance to antiandrogen drugs. In certain embodiments of the methods set forth herein, treatment comprises resensitizing cancer cells (e.g., prostate cancer cells or breast cancer cells) to antiandrogen drugs. In any of the methods described herein, the antiandrogen drug is a compound selected from the group consisting of a non-steroidal androgen receptor antagonist, a CYP17A1 inhibitor, and a combination thereof. In certain embodiments, the antiandrogen drug is enzalutamide, apalutamide, bicalutamide, and/or abiraterone acetate
In any of the aforementioned methods, treatment may comprise reversing cancer cell (e.g., prostate, breast, ovarian, or liver cancer cell) resistance to an antiandrogen drug (e.g., a non-steroidal androgen receptor antagonist or CYP17A1 inhibitor); reducing or decreasing cancer cell resistance to an antiandrogen drug; or resensitizing cancer cells to an antiandrogen drug. In some embodiments, treatment comprises reversing cancer cell (e.g., prostate, breast, ovarian, or liver cancer cell) resistance to enzalutamide, apalutamide, bicalutamide, darolutamide, abiraterone acetate, or a combination thereof. In some other embodiments, treatment comprises reducing or decreasing cancer cell resistance to enzalutamide, apalutamide, bicalutamide, darolutamide, abiraterone acetate, or a combination thereof. In some embodiments, treatment comprises resensitizing cancer cells to enzalutamide, apalutamide, bicalutamide, abiraterone acetate, darolutamide, or a combination thereof.
In any of the methods described herein, the cancer is selected from the group consisting of castration-resistant cancer, metastatic castration-resistant cancer, advanced stage cancer, drug-resistant cancer, antiandrogen-resistant cancer, bicalutamide resistant cancer, enzalutamide-resistant cancer, abiraterone acetate-resistant cancer, apalutamide-resistant cancer, darolutamide-resistant cancer, AR-V1-, AR-V3-, AR-V7-, AR-V9-, and/or AR-V12-induced drug-resistant cancer, AR-V1-, AR-V3-, AR-V7-, AR-V9-, and/or AR-V12-induced antiandrogen drug-resistant cancer, AR-V1-, AR-V3-, AR-V7-, AR-V9-, and/or AR-V12-induced enzalutamide-resistant cancer, AR-V1-, AR-V3-, AR-V7-, AR-V9-, and/or AR-V12-induced abiraterone acetate-resistant cancer, AR-V1-, AR-V3-, AR-V7-, AR-V9-, and/or AR-V12-induced apalutamide-resistant cancer, AR-V1-, AR-V3-, AR-V7-, AR-V9-, and/or AR-V12-induced bicalutamide-resistant cancer, and combinations thereof.
In some embodiments, a test sample is obtained from the subject. The test sample can be obtained before and/or after the AR/AKR1C3 inhibitor(s) is administered to the subject. Non-limiting examples of suitable samples include blood, serum, plasma, cerebrospinal fluid, tissue, saliva, and urine. In some instances, the sample comprises normal tissue. In other instances, the sample comprises cancer tissue. The sample can also be made up of a combination of normal and cancer cells.
In some embodiments, a reference sample is obtained. The reference sample can be obtained, for example, from the subject and can comprise normal tissue. The reference sample can be also be obtained from a different subject and/or a population of subjects. In some instances, the reference sample is either obtained from the subject, a different subject, or a population of subjects before and/or after the AR/AKR1C3 inhibitor(s) is administered to the subject, and comprises normal tissue. However, in some instances the reference sample comprises cancer tissue and is obtained from the subject and/or from a different subject or a population of subjects.
In some embodiments, the level of one or more biomarkers is determined in the test sample and/or reference sample. Non-limiting examples of suitable biomarkers include prostate-specific antigen (PSA), alpha-methylacyl-CoA racemase (AMACR), endoglin (CD105), engrailed 2 (EN-2), prostate-specific membrane antigen (PSMA), caveolin-1, interleukin-6 (IL-6), CD147, members of the S100 protein family (e.g., S100A2, S100A4, S100A8, S100A9, S100A11), annexin A3 (ANXA3), human kallikrein-2 (KLK2), TGF-Beta1, beta-microseminoprotein (MSMB), estrogen receptor (ER), progesterone receptor (PgR), HER2, Ki67, cyclin D1, and cyclin E.
Prostate-specific antigen (PSA) is a protein produced primarily by prostate cells. Most PSA is released into the semen, but some PSA is also released into the blood. In the blood, PSA exists in unbound and complexed (cPSA) forms. Conventional laboratory tests can measure unbound and/or total (unbound and complexed) PSA. Elevated PSA levels can be caused by benign prostatic hyperplasia (BPH) and inflammation of the prostate, but can also be caused by prostate cancer. Determining PSA levels may also include one or more determinations of PSA velocity (i.e., the change in PSA level over time), PSA doubling time (i.e., how quickly the PSA level doubles), PSA density (i.e., a comparison of the PSA concentration and the volume of the prostate (which can be evaluated, for example, by ultrasound)), and age-specific PSA ranges.
Typically, the level of the one or more biomarkers in one or more test samples is compared to the level of the one or more biomarkers in one or more reference samples. Depending on the biomarker, and increase or a decrease relative to a normal control or reference sample can be indicative of the presence of cancer or a higher risk for cancer. As a non-limiting example, levels of one or biomarkers in test samples taken before and after the AR/AKR1C3 inhibitor(s) is administered to the subject are compared to the level of the one or more biomarkers in a reference sample that is either normal tissue obtained from the subject, or normal tissue that is obtained from a different subject or a population of subjects. In some instances, the biomarker is serum, and the level of PSA in a test sample obtained from the subject before the AR/AKR1C3 inhibitor(s) is administered to the subject is higher than the level of PSA in the reference sample. In other instances, the level of PSA in a test sample obtained from the subject after administration of the AR/AKR1C3 inhibitor(s) is decreased relative to the level of PSA in a test sample obtained prior to administration. Alternatively, as another non-limiting example, the difference in PSA level between a sample obtained from the subject after administration and a reference sample is smaller than a difference between the PSA level in a sample obtained from the subject prior to administration and the reference sample (i.e., administration results in a decrease in PSA in the test sample such that the difference between the level measured in the test sample and the level measured in the reference sample is diminished or eliminated).
The differences between the reference sample or value and the test sample need only be sufficient to be detected. In some embodiments, an increased level of a biomarker (e.g., PSA) in the test sample, and hence the presence of cancer or increased risk of cancer, is determined when the biomarker levels are at least, e.g., about 1-fold, 2-fold, 3-fold, 4-fold, 5-fold, 6-fold, 7-fold, 8-fold, 9-fold, 10-fold, 11-fold, 12-fold, 13-fold, 14-fold, 15-fold, 16-fold, 17-fold, 18-fold, 19-fold, or 20-fold higher in comparison to a negative control. In other embodiments, a decreased level of a biomarker in the test sample, and hence the presence of cancer or increased risk of cancer, is determined when the biomarker levels are at least, e.g., about 1-fold, 2-fold, 3-fold, 4-fold, 5-fold, 6-fold, 7-fold, 8-fold, 9-fold, 10-fold, 11-fold, 12-fold, 13-fold, 14-fold, 15-fold, 16-fold, 17-fold, 18-fold, 19-fold, or 20-fold lower in comparison to a negative control.
The biomarker levels can be detected using any method known in the art, including the use of antibodies specific for the biomarkers. Exemplary methods include, without limitation, PCR, Western Blot, dot blot, enzyme-linked immunosorbent assay (ELISA), radioimmunoassay (RIA), immunoprecipitation, immunofluorescence, FACS analysis, electrochemiluminescence, and multiplex bead assays (e.g., using Luminex or fluorescent microbeads). In some instances, nucleic acid sequencing is employed.
In certain embodiments, the presence of decreased or increased levels of one or more biomarkers is indicated by a detectable signal (e.g., a blot, fluorescence, chemiluminescence, color, radioactivity) in an immunoassay or PCR reaction (e.g., quantitative PCR). This detectable signal can be compared to the signal from a control sample or to a threshold value. In some embodiments, a decreased presence is detected, and the presence or increased risk of cancer is indicated, when the detectable signal of biomarker(s) in the test sample is at least, e.g., about 1-fold, 2-fold, 3-fold, 4-fold, 5-fold, 6-fold, 7-fold, 8-fold, 9-fold, 10-fold, 11-fold, 12-fold, 13-fold, 14-fold, 15-fold, 16-fold, 17-fold, 18-fold, 19-fold, or 20-fold lower in comparison to the signal of antibodies in the reference sample or the predetermined threshold value. In other embodiments, an increased presence is detected, and the presence or increased risk of cancer is indicated, when the detectable signal of biomarker(s) in the test sample is at least, e.g., about 1-fold, 2-fold, 3-fold, 4-fold, 5-fold, 6-fold, 7-fold, 8-fold, 9-fold, 10-fold, 11-fold, 12-fold, 13-fold, 14-fold, 15-fold, 16-fold, 17-fold, 18-fold, 19-fold, or 20-fold greater in comparison to the signal of antibodies in the reference sample or the predetermined threshold value.
Also provided herein is a method for inhibiting an androgen receptor (AR), the method comprising contacting the AR with an effective amount of a compound as described herein (e.g., a compound according to Formula I, IIa, IIb, IIc, IIIa, IIIb, or IIIc) or a salt thereof, thereby inhibiting the AR.
Also provided herein is a method for inhibiting aldo-keto reductase family 1 member C3 (AKR1C3), the method comprising contacting the AKR1C3 with an effective amount of a compound as described herein (e.g., a compound according Formula I, IIa, IIb, IIc, IIIa, IIIb, or IIIc) or a salt thereof, thereby inhibiting the AKR1C3.
Inhibiting the AR or the AKR1C3 generally includes contacting the AR or the AKR1C3 with an amount of the compound sufficient to reduce the activity of the AR or the AKR1C3 as compared to activity of the AR or the AKR1C3 in the absence of the compound. For example, contacting the AR or the AKR1C3 with the inhibitor can result in from about 1% to about 99% inhibition (i.e., the activity of the inhibited AR or AKR1C3 ranges from 99% to 1% of the AR activity or AKR1C3 activity in the absence of the compound). The level of inhibition can range from about 1% to about 10%, or from about 10% to about 20%, or from about 20% to about 30%, or from about 30% to about 40%, or from about 40% to about 50%, or from about 50% to about 60%, or from about 60% to about 70%, or from about 70% to about 80%, or from about 80% to about 90%, or from about 90% to about 99%. The level of inhibition can range from about 5% to about 95%, or from about 10% to about 90%, or from about 20% to about 80%, or from about 30% to about 70%, or from about 40% to about 60%. In some embodiments, contacting the AR or the AKR1C3 with a compound as described herein will result in complete (i.e., 100%) inhibition of the AR or the AKR1C3.
Also provided herein are kits for preventing or treating cancer in a subject. The kits are useful for treating any cancer, some non-limiting examples of which include prostate cancer, breast cancer, uterine cancer, ovarian cancer, liver cancer, colorectal cancer, stomach cancer, pancreatic cancer, lung cancer (e.g., mesothelioma, lung adenocarcinoma), esophageal cancer, head and neck cancer, sarcomas, melanomas, thyroid carcinoma, CNS cancers (e.g., neuroblastoma, glioblastoma), chronic lymphocytic leukemia, and any other cancer described herein. The kits are also suitable for treating androgen-independent, castrate-resistant, castration recurrent, hormone-resistant, drug-resistant, and metastatic castrate-resistant cancers.
In some embodiments, the kits comprise an AR/AKR1C3 inhibitor. In some other embodiments, the kits further comprise a pharmaceutically acceptable carrier. In particular embodiments, the AR/AKR1C3 inhibitor is a compound according to Formulas I, IIa, IIb, IIc, IIIa, IIIb, and/or IIIc.
In some embodiments, the antiandrogen drug is a non-steroidal androgen receptor antagonist, a CYP17A1 inhibitor, or a combination thereof. Suitable non-steroidal AR antagonists include bicalutamide (Casodex, Cosudex, Calutide, Kalumid), flutamide, nilutamide, apalutamide (ARN-509, JNJ-56021927), darolutamide, enzalutamide (Xtandi), cimetidine and topilutamide. Suitable CYP17A1 inhibitors include abiraterone acetate (Zytiga), ketoconazole, and seviteronel. Any combination of antiandrogen drugs can be used in the kits.
Materials and reagents to carry out the various methods described above can be provided in kits to facilitate execution of the methods. As used herein, the term “kit” includes a combination of articles that facilitates a process, assay, analysis, or manipulation. The kits may be utilized in a wide range of applications including, for example, diagnostics, prognostics, therapy, and the like.
Kits can contain chemical reagents as well as other components. In addition, the kits can include, without limitation, instructions to the kit user, apparatus and reagents for sample collection and/or purification, apparatus and reagents for product collection and/or purification, apparatus and reagents for administering AR/AKR1C3 inhibitor(s), apparatus and reagents for determining the level(s) of biomarker(s), sample tubes, holders, trays, racks, dishes, plates, solutions, buffers or other chemical reagents, suitable samples to be used for standardization, normalization, and/or control samples. Kits can also be packaged for convenient storage and safe shipping, for example, in a box having a lid.
In some embodiments, the kits also contain negative and positive control samples for detection of biomarkers. Non-limiting examples of suitable biomarkers include prostate-specific antigen (PSA), alpha-methylacyl-CoA racemase (AMACR), endoglin (CD105), engrailed 2 (EN-2), prostate-specific membrane antigen (PSMA), caveolin-1, interleukin-6 (IL-6), CD147, members of the S100 protein family (e.g., S100A2, S100A4, S100A8, S100A9, S100A11), annexin A3 (ANXA3), human kallikrein-2 (KLK2), TGF-Beta1, beta-microseminoprotein (MSMB), estrogen receptor (ER), progesterone receptor (PgR), HER2, Ki67, cyclin D1, and cyclin E. In some instances, the one or more biomarkers comprises PSA. In some embodiments, the negative control samples are obtained from individuals or groups of individuals who do not have cancer. In other embodiments, the positive control samples are obtained from individuals or groups of individuals who have cancer. In some embodiments, the kits contain samples for the preparation of a titrated curve of one or more biomarkers in a sample, to assist in the evaluation of quantified levels of the one or more biomarkers in a test biological sample.
5-Benzoyl-N-(3,5-bis(trifluoromethyl)phenyl)-2-hydroxybenzamide (3) was prepared as summarized in the scheme above. 2-Hydroxybenzoic acid (a) was esterified to yield methyl ester (b). Acylation of (b) afforded benzophenone (c) which was subsequently hydrolyzed to yield benzoic acid (d). Microwave-assisted amidation of (d) afforded compound 3. 1H NMR (400 MHz, DMSO-d6) δ 12.05 (s, br, 1H), 11.00 (s, 1H), 8.46 (s, 2H), 8.27 (d, J=2.3 Hz, 1H), 7.92-7.81 (m, 2H), 7.78-7.64 (m, 3H), 7.58 (t, J=7.5 Hz, 2H), 7.17 (d, J=8.6 Hz, 1H).
N-(3,5-Bis(trifluoromethyl)phenyl)-2-hydroxy-5-(4-methoxybenzoyl)benzamide (8) was prepared as summarized in the following scheme. 2-Hydroxybenzoic acid (a) was esterified to yield methyl ester (b). Acylation of (b) afforded benzophenone (e) which was subsequently hydrolyzed to yield benzoic acid (f). Microwave assisted-amidation of (f) afforded compound 8. 1H NMR (300 MHz, DMSO-d6) δ 11.98 (s, br, 1H), 10.93 (s, 1H), 8.45 (d, J=1.6 Hz, 2H), 8.24 (d, J=2.2 Hz, 1H), 7.90-7.70 (m, 4H), 7.13 (dd, J=17.8, 8.7 Hz, 3H), 3.87 (s, 3H).
N-(3,5-bis(trifluoromethyl)phenyl)-2-hydroxy-5-(4-methoxybenzyl)benzamide (5) and 5-benzyl-N-(3,5-bis(trifluoromethyl)phenyl)-2-hydroxybenzamide (1) were prepared as summarized in the following scheme. Compound 8 and compound 3 were reduced to afford compound 5 and compound 1, respectively. Compound 1: 1H NMR (300 MHz, DMSO-d6) δ 11.16 (s, 1H), 10.81 (s, 1H), 8.51-8.42 (m, 2H), 7.87-7.80 (m, 1H), 7.74 (d, J=2.3 Hz, 1H), 7.35-7.16 (m, 6H), 6.95 (d, J=8.4 Hz, 1H), 3.92 (s, 2H).
2-Hydroxy-5-(4-methoxybenzyl)-N-(4-(trifluoromethyl)phenyl)benzamide (6) was prepared in similar fashion. 1H NMR (300 MHz, DMSO-d6) δ 11.31 (s, 1H), 10.61 (s, 1H), 7.93 (d, J=8.4 Hz, 2H), 7.78-7.68 (m, 3H), 7.26 (dd, J=8.4, 2.3 Hz, 1H), 7.20-7.09 (m, 2H), 6.98-6.80 (m, 3H), 3.85 (s, 2H), 3.71 (s, 3H).
Synthesis of N-(3,5-bis(trifluoromethyl)phenyl)-2-hydroxy-6-(4-methoxyphenoxy)benzamide (39) was prepared as summarized in the following scheme. 2-Fluoro-6-hydroxybenzaldehyde (g) was converted to the corresponding ether-protected compound (h). Coupling of compound (h) with 4-methoxyphenol afforded oxydibenzene (i) which was subsequently oxidized to yield benzoic acid (j). Further reduction of (j) afforded the hydroxybenzoic acid (k). Final microwave assisted amidation of (k) yielded the
compound 39. 1H NMR (300 MHz, DMSO-d6) δ 11.06 (s, 1H), 10.22 (s, 1H), 8.41-8.34 (m, 2H), 7.78 (dq, J=1.8, 0.9 Hz, 1H), 7.17 (t, J=8.3 Hz, 1H), 7.06-6.89 (m, 4H), 6.67 (dd, J=8.3, 0.8 Hz, 1H), 6.19 (dd, J=8.3, 0.8 Hz, 1H), 3.72 (s, 3H).
To determine the ability of compound 1 and compound 2 to inhibit the expression of AR/AR-Vs and AKR1C3 expression CWR22rv1 cells were treated with the two compounds. The cells were treated with 5 μM compound 1 or 5 μM compound 2 for 48 hrs. Following treatment, cell lysates were collected and analyzed. Analysis was performed using Western blot analysis for AR-FL, AR-Vs, and AKR1C3 protein expression. The results of this analysis is shown in the Western blot images in
To examine whether compound 1 and compound 2 are useful in inhibiting AKR1C3 activity, LNCaP-AKR1C3 were treated with either compound 1 or compound 2 for 48 hrs. AKR1C3 enzymatic activity was determined by Aldo-Keto Reductase (AKR) Activity Assay Kit (Colorimetric), the results of which are shown in
To examine to ability of the compounds to inhibit cell growth, C4-2B MDVR cells were treated with either compound 1 or compound 2 for 48 hrs. The cell number was determined and graphically summarized in
To evaluate whether compound 1 is an effective inhibitor of anti-androgen resistant cell growth, a series of resistant cells were treated with their respective anti-androgens for 48 hrs. Enzalutamide resistant MDVR cells, abiraterone resistant AbiR cells, apalutamide resistant ApaIR cells, and darolutamide resistant DaroR cells were treated with their respective anti-androgens: enza (20 μM), abi (20 μM), apal (20 μM), darolutamide (20 μM), or compound 1 (5 μM). The cell number was determined for each resistant cell type and graphically summarized in
Next the effects of compound 1 in vivo were studied in two separate models. First, intact SCID mice were injected with resistant prostate cancer VCaP cells suspended in matrigel. Once tumors were palpable, mice were divided into two groups: control or 20 mg/kg compound 1 administered I.P. 5 days a week for 3 weeks. Tumor volumes were measured twice weekly and mouse weights were monitored. At the end of treatment, tumors and serum were collected for assessment. As seen in
The LuCaP35CR PDX model was also employed to investigate the effects of compound 1 in vivo. For this model, SCID mice were castrated and implanted with LuCaP35CR tissues. Once tumors were palpable, mice were divided into two groups: control or 20 mg/kg compound 1 administered I.P. 5 days a week for 3 weeks. Tumor volumes were measured twice weekly and mouse weights were monitored. At the end of treatment, tumors and serum were collected for assessment. As with the VCaP model, compound 1 treatment had significantly decreased tumor volumes (
AKR1C3 plays a crucial role in the synthesis of testosterone, by catalyzing the conversion of the adrenal androgens dehydroepiandrosterone (DHEA) and androstenedione (AD) into testosterone. To determine the effects of compound 1 on inhibition of AKR1C3 enzymatic activity an ex vivo tumor based AKR1C3 enzyme assay was conducted. LUCaP35CX tumors, which express high levels of AKR1C3, were digested with 0.1% protease and cultured in medium supplemented with 10% heat-inactivated charcoal-dextran-stripped FBS. After overnight incubation, androstenedione (300 nmol/L) was added with or without compound 1. The supernatants were collected to measure testosterone. Compound 1 showed dose-dependent inhibition of androstenedione conversion to testosterone (
Next, the effects of the new AR/AKR1C3 inhibitors on AR signaling were studied. Compound 1 and compound 5 were found to be capable of inhibiting DHT-stimulated AR nuclear expression in LNCaP cells (
In addition, the effect of the compounds on the expression of genes involved in cancer was studied. Enzalutamide resistant C4-2B MDVR cells were treated with 5 μM of compound 1, 2, 5, or 8, or DMSO control. Total RNA was isolated, and RNAseq analysis revealed that treatment with the compounds greatly reduced expression of genes associated with cancer cell proliferation and survival (
Exemplary embodiments provided in accordance with the presently disclosed subject matter include, but are not limited to, the claims and the following embodiments:
and pharmaceutically acceptable salts thereof.
Although the foregoing has been described in some detail by way of illustration and example for purposes of clarity and understanding, one of skill in the art will appreciate that certain changes and modifications can be practiced within the scope of the appended claims. In addition, each reference provided herein is incorporated by reference in its entirety to the same extent as if each reference was individually incorporated by reference.
The present application is a continuation of International Appl. No. PCT/US2020/060907, filed on Nov. 17, 2020, which claims priority to U.S. Provisional Pat. Appl. No. 62/937,136, filed on Nov. 18, 2019, which applications are incorporated herein by reference in their entirety.
| Number | Date | Country | |
|---|---|---|---|
| 62937136 | Nov 2019 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/US2020/060907 | Nov 2020 | US |
| Child | 17745621 | US |
