WO2021124106A1 - Selective cdk4/6 inhibitor cancer therapeutics - Google Patents
Selective cdk4/6 inhibitor cancer therapeutics Download PDFInfo
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- WO2021124106A1 WO2021124106A1 PCT/IB2020/061972 IB2020061972W WO2021124106A1 WO 2021124106 A1 WO2021124106 A1 WO 2021124106A1 IB 2020061972 W IB2020061972 W IB 2020061972W WO 2021124106 A1 WO2021124106 A1 WO 2021124106A1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D487/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
- C07D487/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
- C07D487/04—Ortho-condensed systems
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
- A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
- A61K31/519—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim ortho- or peri-condensed with heterocyclic rings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/20—Pills, tablets, discs, rods
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P15/00—Drugs for genital or sexual disorders; Contraceptives
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
- A61P35/04—Antineoplastic agents specific for metastasis
Definitions
- CSCs are tumor-initiating cells (TICs) that are resistant to conventional cancer therapies, such as chemo-therapy and radiation treatment. As a consequence, CSCs are responsible for both tumor recurrence and distant metastasis, driving treatment failure and poor clinical outcomes in cancer patients.
- CSCs are an especially small sub-set of the tumor cell population, their metabolic and phenotypic properties have remained largely uncharacterized, until recently.
- CSCs are strikingly resilient and highly resistant to cellular stress, which allows them to undergo anchorage-independent growth, especially under conditions of low- attachment. As a consequence, they form 3D spheroids, which retain the properties of CSCs and stem cell progenitors.
- 3D spheroid formation is a functional read-out for stemness in epithelial cancer cells and allows one to enrich for a population of epithelioid cells with a stem-like phenotype.
- 3D spheroids are also known as mammospheres when they are prepared using breast cancer cells, such as MCF7, among others.
- 3D spheroids have been generated from 2 distinct ER(+) cells lines (MCF7 and T47D) and subjected to unbiased label-free proteomics analysis. This work started the analysis of the phenotypic behavior of CSCs at a molecular level. The 3D spheroids were directly compared with monolayers of these cell lines and processed in parallel. This allowed for an identification of the proteomic features that are characteristic of the CSC phenotype in 3D spheroids, relative to monolayers. Based on this molecular analysis, mammospheres were observed to be significantly enriched in mitochondrial proteins.
- mitochondrial-related proteins included molecules involved in beta-oxidation and ketone metabolism/re-utilization, mitochondrial biogenesis, electron transport, ADP/ATP exchange/transport, CoQ synthesis and ROS production, as well as the suppression of mitophagy. As such, increased mitochondrial protein synthesis or decreased mitophagy could allow the accumulation of mitochondrial mass in CSCs. [0005] Given the increases in CSCs, mitochondrial mass is being considered as a new metabolic biomarker to purify CSCs. Using this overall approach, it has been observed that it was possible to significantly enrich CSC activity using only MitoTracker, as a single marker for both ER(+) (MCF7) and ER(-) (MDA-MB-231) breast cancer cell lines.
- MitoTracker- high cells were found to be chemo-resistant to Paclitaxel, exhibiting resistance to the Paclitaxel- induced DNA-damage response.
- new pharmaceutical compounds for anti-cancer therapies that eradicate CSCs, prevent or reduce the likelihood of metastasis and/or recurrence, and reduce or eliminate cancer resistance to chemotherapies and other anti-cancer therapies.
- therapeutic strategies and anti-cancer therapies that specifically target the “fittest” CSCs, and eliminate further cancer growth, including anchorage-independent growth, tumor recurrence, and distant metastasis.
- CSCs Cancer stem cells
- mitochondrial inhibitors successfully blocked 3D tumor sphere formation, including i) FDA-approved antibiotics (doxycycline, tigecycline, azithromycin, pyrvinium pamoate, atovaquone, bedaquiline), ii) natural compounds (actinonin, CAPE, berberine, brutieridin and melitidin), as well as iii) experimental compounds (oligomycin and AR- C155858, an MCT1/2 inhibitor), among others.
- CDKs Cyclin-dependent kinases 4 and 6 are enzymes known to promote cell mitosis and meiosis, both in normal cells and in cancer cells.
- CDKs Naturally occurring protein inhibitors of CDKs, such as p16 and p27, have been shown to inhibit growth in vitro of lung cancer cell lines. Certain CDK inhibitors may be useful as chemoprotective agents through their ability to inhibit cell cycle progression of normal untransformed cells.
- CDK 4/6 a class of CDK inhibitors, and primarily inhibitors of CDK 4 and CDK 6 (“CDK 4/6”), that have strong efficacy as cancer therapeutics.
- the first class of anti- cancer CDK 4/6 inhibitors are substituted pyrrolopyrimidine compounds having a fatty acid moiety.
- the second class comprises substituted pyridopyrimidines, having a fatty acid moiety.
- the third class comprises substituted benzimidazole compounds, having a fatty acid moiety.
- Compounds in either the first class, second class, or third class, including salts thereof, may be used as a pharmaceutical compound for the treatment of cancer. Demonstrative salts include succinate, trifluoroacetate, tartrate, and malate, among others as will be appreciated by those having an ordinary level of skill in the art.
- the present approach also provides pharmaceutical formulations having a therapeutically effective amount of a compound from either the first class, the second class, or the third class, or in some embodiments one or more from each class, or a therapeutically acceptable salt(s) thereof, and a pharmaceutically acceptable carrier, diluent, or excipient therefor. All of these forms are within the present approach. It should be appreciated that a pharmaceutically acceptable carrier, as are known in the art, may be used. [0013] Compounds described herein may be used in connection with methods of treating cancer, in a mammal, including humans, comprising administering to the mammal an amount of a compound from either the first class, the second class, or the third class, or a pharmaceutically acceptable salt thereof, which is effective in treating such disorder or condition.
- the present approach is useful for treating abnormal cell proliferation such a cancer.
- the compounds described herein may be used for treating the abnormal cell proliferation disorders, and in particular a cancer selected from the group consisting of cancers of the breast, ovary, cervix, prostate, testis, esophagus, stomach, skin, lung, bone, colon, pancreas, thyroid, biliary passages, buccal cavity and pharynx (oral), lip, tongue, mouth, pharynx, small intestine, colon-rectum, large intestine, rectum, brain and central nervous system, glioblastoma, neuroblastoma, keratoacanthoma, epidermoid carcinoma, large cell carcinoma, adenocarcinoma, adenocarcinoma, adenoma, adenocarcinoma, follicular carcinoma, undifferentiated carcinoma, papillary carcinoma, seminoma, melanoma, sarcoma, bladder carcinoma, liver carcinoma, kidney carcinoma
- the present approach may be used in combination with, and/or to increase the effectiveness of, other therapies.
- Some embodiments of the present approach may take the form of a compound having the general formula , in which: R 4 is selected from the group consisting of hydrogen, C 1 -C 8 -alkyl, substituted C 1 - C 8 -alkyl, C 3 -C 8 -cycloalkyl, substituted C 3 -C 8 -cycloalkyl, aryl, substituted aryl, heteroaryl and substituted heteroaryl; Z is CR z in which R z is selected from the group consisting of halo, hydrogen, C 1 - C 3 -alkyl, C 1 -C 3 -alkoxy, CN, C ⁇ NOH, C ⁇ NOCH 3 , C(O)H, C(O)C 1 -C 3 -alkyl, C 3 -C 8 -cycloalkyl, heterocyclyl, aryl, heteroaryl
- the present approach may take the form of a pharmaceutical composition including a compound as described herein as the active therapeutic agent, or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable carrier.
- the composition may be, in some embodiments, a tablet having a core with between 35% and 55% by weight of the active therapeutic agent, and a pharmaceutically acceptable carrier.
- the pharmaceutically acceptable carrier may be, for instance, microcrystalline cellulose, crospovidone type A, low-substituted hydroxypropylcellulose, magnesium stearate, and colloidal anhydrous silica.
- the compounds and pharmaceutical compositions described herein have a potency and selectivity towards cancer stem cells that renders them suitable for various anti-cancer therapeutic uses.
- the present approach may take the form of methods for preventing or reducing the proliferation of at least one of cancer cells, cancer stem cells, and circulating tumor cells, in which a patient in need thereof is administered a pharmaceutically effective amount of a compound or pharmaceutical composition as described herein.
- the present approach may take the form of methods for treating cancer, in which a patient in need thereof is administered a pharmaceutically effective amount of a compound or pharmaceutical composition as described herein.
- the present approach may take the form of methods for treating or preventing metastatic diseases, in which a patient in need thereof is administered a pharmaceutically effective amount of a compound or pharmaceutical composition as described herein.
- the present approach may take the form of methods for treating or preventing tumor recurrence, in which a patient in need thereof is administered a pharmaceutically effective amount of a compound or pharmaceutical composition as described herein.
- the present approach may take the form of methods for reducing the treatment resistance of a cancer, such as chemotherapy resistance, in which a patient in need thereof is administered a pharmaceutically effective amount of a compound or pharmaceutical composition as described herein.
- the present approach may take the form of methods for t treating or preventing at least one of radiation therapy resistance, chemotherapy resistance, and hormone therapy resistance, in which a patient in need thereof is administered a pharmaceutically effective amount of a compound or pharmaceutical composition as described herein.
- a patient in need thereof is administered a pharmaceutically effective amount of a compound or pharmaceutical composition as described herein.
- the compounds of the present approach may also be used in the manufacture of a medicament for a number of therapeutic uses, such as the treatment or prevention of cancer, the treatment or prevention of metastatic disease, and the treatment or prevention of tumor recurrence.
- Fig. 1 shows dose-response curves comparing Compound [1C] to its parent compound, using the mammosphere formation assay on the MCF7 cell line.
- Fig.2 are dose-response curves comparing Compound [2C] to its parent compound, using the mammosphere formation assay on the MCF7 cell line.
- Fig.3 is a dose-response curve for the parent compound of Compound [3C], using the mammosphere formation assay on the MCF7 cell line.
- Fig. 1 shows dose-response curves comparing Compound [1C] to its parent compound, using the mammosphere formation assay on the MCF7 cell line.
- Fig.2 are dose-response curves comparing Compound [2C] to its parent compound, using the mammosphere formation assay on the MCF7 cell line.
- Fig.3 is a dose-response curve for the parent compound of Compound [3C
- Fig. 4 shows dose-response curves comparing Compound [1C] to its parent compound, using the Hoechst staining assay on the MCF7 cell line.
- Fig. 5 shows dose-response curves comparing Compound [2C] to its parent compound, using the Hoechst staining assay on the MCF7 cell line.
- Fig.6 is a dose-response curve comparing for the parent compound of Compound [3C], using the Hoechst staining assay on the MCF7 cell line.
- FIG. 7 shows dose-response curves comparing Compound [1C] to its parent compound, using the Hoechst staining assay on the hTERT-BJ1 cell line.
- Fig. 8 shows dose-response curves comparing Compound [2C] to its parent compound, using the Hoechst staining assay on the hTERT-BJ1cell line.
- Fig.9 is a dose-response curve comparing for the parent compound of Compound [3C], using the Hoechst staining assay on the hTERT-BJ1 cell line.
- DESCRIPTION [0034] The following description includes the currently contemplated modes of carrying out exemplary embodiments of the present approach.
- compounds from three classes of CDK 4/6 inhibitors may be used as anti-cancer therapeutics.
- the first class comprises substituted pyrrolopyrimidine compounds having a fatty acid moiety.
- the second class comprises substituted pyridopyrimidine compounds having a fatty acid moiety.
- the third class comprises substituted benzimidazole compounds having a fatty acid moiety.
- the compounds described herein have useful pharmaceutical and medicinal properties.
- CDK 4/6 inhibitory activity exhibit significant selective CDK 4/6 inhibitory activity and therefore are of value in the treatment of a wide variety of clinical conditions in which CDK 4/6 kinases are abnormally elevated, or activated or present in normal amounts and activities, but where inhibition of the CDKs is desirable to treat a cellular proliferative disorder.
- these compounds are promising as anti-cancer therapeutics.
- Compounds in each class are described below the following definitions, which are applicable to embodiments of the present approach.
- the notation C(O) refers to a carbon to oxygen double bond.
- halo used herein means a halogen, and includes fluorine, chlorine, bromine, or iodine, bonded as is understood in the art.
- alkyl refers to saturated aliphatic groups, including straight-chain alkyl groups (e.g., methyl, ethyl, etc.), branched-chain alkyl groups (isopropyl, tert- butyl, etc.), cycloalkyl (alicyclic) groups (cyclopropyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl), alkyl-substituted cycloalkyl groups, and cycloalkyl substituted alkyl groups.
- alkyl also includes alkenyl groups and alkynyl groups.
- C n - alkyl wherein n is an integer from, e.g., 1-20, to indicate a particular alkyl group (straight- or branched-chain) of a particular range or number of carbons in the group.
- C 1 -C 3 -alkyl includes, but is not limited to, methyl, ethyl, propyl, and isopropyl.
- C 3-6 -cycloalkyl includes, but is not limited to, cyclopropyl, cyclopentyl, and cyclohexyl.
- Alkyl groups, as well as cycloalkyl groups may be unsubstituted or substituted.
- alkyl includes both “unsubstituted alkyl” and “substituted alkyl”, the latter of which refers to moieties having substituents replacing a hydrogen on one or more carbons of the hydrocarbon backbone.
- alkenyl includes unsaturated aliphatic groups analogous in length and possible substitution to the alkyls described above, but which contain at least one double bond. Alkenyl also include “unsubstituted alkenyls” and “substituted alkenyls,” the latter of which refers to moieties having substituents replacing a hydrogen on one or more carbons of the hydrocarbon backbone.
- alkenyl includes straight-chain alkenyl groups (e.g., ethenyl, propenyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, etc.), branched- chain alkenyl groups, cycloalkenyl (alicyclic) groups (cyclopropenyl, cyclopentenyl, cyclohexenyl, cycloheptenyl, cyclooctenyl), alkyl or alkenyl substituted cycloalkenyl groups, and cycloalkyl or cycloalkenyl substituted alkenyl groups.
- alkenyl includes straight-chain alkenyl groups (e.g., ethenyl, propenyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, de
- alkenyl further includes alkenyl groups that include oxygen, nitrogen, sulfur or phosphorous atoms replacing one or more carbons of the hydrocarbon backbone.
- a straight chain or branched chain alkenyl group has 6 or fewer carbon atoms in its backbone (e.g., C 2 -C 6 for straight chain, C 3 -C 6 for branched chain).
- cycloalkenyl groups may have from 3-8 carbon atoms in their ring structure, and more preferably have 5 or 6 carbons in the ring structure.
- C 2 -C 6 includes alkenyl groups containing 2 to 6 carbon atoms.
- alkynyl includes unsaturated aliphatic groups analogous in length and possible substitution to the alkyls described above, but which contain at least one triple bond. Moreover, the term alkynyl includes both “unsubstituted alkynyls” and “substituted alkynyls,” the latter of which refers to alkynyl moieties having substituents replacing a hydrogen on one or more carbons of the hydrocarbon backbone.
- alkynyl includes straight-chain alkynyl groups (e.g., ethynyl, propynyl, butynyl, pentynyl, hexynyl, heptynyl, octynyl, nonynyl, decynyl, etc.), branched-chain alkynyl groups, and cycloalkyl or cycloalkenyl substituted alkynyl groups.
- alkynyl further includes alkynyl groups that include oxygen, nitrogen, sulfur or phosphorous atoms replacing one or more carbons of the hydrocarbon backbone.
- a straight chain or branched chain alkynyl group has 6 or fewer carbon atoms in its backbone (e.g., C 2 -C 6 for straight chain, C 3 -C 6 for branched chain).
- C 2 -C 6 includes alkynyl groups containing 2 to 6 carbon atoms.
- substituted is intended to describe moieties having substituents replacing a hydrogen on one or more atoms, e.g. C, O or N, of a molecule.
- substituents can include, for example but not limited to, alkyl, alkoxy, alkenyl, alkynyl, halo, hydroxyl, alkylcarbonyloxy, arylcarbonyloxy, alkoxycarbonyloxy, aryloxycarbonyloxy, carboxylate, alkylcarbonyl, arylcarbonyl, alkoxycarbonyl, aminocarbonyl, alkylaminocarbonyl, dialkylaminocarbonyl, alkylthiocarbonyl, alkoxyl, phosphate, phosphonato, phosphinato, amino (including alkyl amino, dialkylamino, arylamino, diarylamino, and alkylarylamino), acylamino (including alkylcarbonylamino, arylcarbonylamino, carbamoyl and ureido), amidino, imino, sulfhydryl, alkylthio, arylthio, thio
- amine or “amino” should be refer to both a molecule, or a moiety or functional group, as generally understood in the art, and may be primary, secondary, or tertiary.
- amine or “amino” includes compounds where a nitrogen atom is covalently bonded to at least one carbon, hydrogen or heteroatom.
- alkylamino comprises groups and compounds wherein the nitrogen is bound to at least one additional alkyl group.
- dialkyl amino includes groups wherein the nitrogen atom is bound to at least two additional alkyl groups.
- arylamino and diarylamino include groups wherein the nitrogen is bound to at least one or two aryl groups, respectively.
- alkylarylamino refers to an amino group which is bound to at least one alkyl group and at least one aryl group.
- alkaminoalkyl refers to an alkyl, alkenyl, or alkynyl group bound to a nitrogen atom which is also bound to an alkyl group.
- amide includes compounds or moieties which contain a nitrogen atom which is bound to the carbon of a carbonyl or a thiocarbonyl group.
- alkaminocarbonyl or “alkylaminocarbonyl” groups which include alkyl, alkenyl, aryl or alkynyl groups bound to an amino group bound to a carbonyl group. It includes arylaminocarbonyl and arylcarbonylamino groups which include aryl or heteroaryl moieties bound to an amino group which is bound to the carbon of a carbonyl or thiocarbonyl group.
- alkylaminocarbonyl “alkenylaminocarbonyl,” “alkynylaminocarbonyl,” “arylaminocarbonyl,” “alkylcarbonylamino,” “alkenylcarbonylamino,” “alkynylcarbonylamino,” and “arylcarbonylamino” are included in term “amide.” Amides also include urea groups (aminocarbonylamino) and carbamates (oxycarbonylamino).
- aryl includes groups, including 5- and 6-membered single-ring aromatic groups that may include from zero to four heteroatoms, for example, phenyl, pyrrole, furan, thiophene, thiazole, isothiaozole, imidazole, triazole, tetrazole, pyrazole, oxazole, isoxazole, pyridine, pyrazine, pyridazine, and pyrimidine, and the like.
- aryl includes multicyclic aryl groups, e.g., tricyclic, bicyclic, e.g., naphthalene, benzoxazole, benzodioxazole, benzothiazole, benzoimidazole, benzothiophene, methylenedioxyphenyl, quinoline, isoquinoline, anthryl, phenanthryl, naphthridine, indole, benzofuran, purine, benzofuran, deazapurine, or indolizine.
- multicyclic aryl groups e.g., tricyclic, bicyclic, e.g., naphthalene, benzoxazole, benzodioxazole, benzothiazole, benzoimidazole, benzothiophene, methylenedioxyphenyl, quinoline, isoquinoline, anthryl, phenanthryl, naphthridine, indole, benzofuran, pur
- aryl groups having heteroatoms in the ring structure may also be referred to as “aryl heterocycles”, “heterocycles,” “heteroaryls” or “heteroaromatics.”
- the aromatic ring can be substituted at one or more ring positions with such substituents as described above, as for example, alkyl, halogen, hydroxyl, alkoxy, alkylcarbonyloxy, arylcarbonyloxy, alkoxycarbonyloxy, aryloxycarbonyloxy, carboxylate, alkylcarbonyl, alkylaminoacarbonyl, aralkylaminocarbonyl, alkenylaminocarbonyl, alkylcarbonyl, arylcarbonyl, aralkylcarbonyl, alkenylcarbonyl, alkoxycarbonyl, aminocarbonyl, alkylthiocarbonyl, phosphate, phosphonato, phosphinato, cyano, amino (including alkyl amino,
- Aryl groups can also be fused or bridged with alicyclic or heterocyclic rings which are not aromatic so as to form a polycycle (e.g., tetralin).
- heteroaryl represents a stable monocyclic or bicyclic ring of up to 7 atoms in each ring, wherein at least one ring is aromatic and contains from 1 to 4 heteroatoms selected from the group consisting of O, N and S.
- Heteroaryl groups within the scope of this definition include but are not limited to: acridinyl, carbazolyl, cinnolinyl, quinoxalinyl, pyrrazolyl, indolyl, benzotriazolyl, furanyl, thienyl, benzothienyl, benzofuranyl, quinolinyl, isoquinolinyl, oxazolyl, isoxazolyl, indolyl, pyrazinyl, pyridazinyl, pyridinyl, pyrimidinyl, pyrrolyl, tetrahydroquinoline.
- heteroaryl is also understood to include the N-oxide derivative of any nitrogen-containing heteroaryl.
- heteroaryl substituent is bicyclic and one ring is non-aromatic or contains no heteroatoms, it is understood that attachment is via the aromatic ring or via the heteroatom containing ring, respectively.
- heterocycle or “heterocyclyl” as used herein is intended to mean a 5- to 10-membered aromatic or nonaromatic heterocycle containing from 1 to 4 heteroatoms selected from the group consisting of O, N and S, and includes bicyclic groups.
- Heterocyclyl therefore includes the above mentioned heteroaryls, as well as dihydro and tetrahydro analogs thereof. Further examples of “heterocyclyl” include, but are not limited to the following: benzoimidazolyl, benzofuranyl, benzofurazanyl, benzopyrazolyl, benzotriazolyl, benzothiophenyl, benzoxazolyl, carbazolyl, carbolinyl, cinnolinyl, furanyl, imidazolyl, indolinyl, indolyl, indolazinyl, indazolyl, isobenzofuranyl, isoindolyl, isoquinolyl, isothiazolyl, isoxazolyl, naphthpyridinyl, oxadiazolyl, oxazolyl, oxazoline, isoxazoline, oxetanyl, pyranyl, pyrazinyl, pyr
- acyl includes compounds and moieties which contain the acyl radical (CH3CO—) or a carbonyl group.
- substituted acyl includes acyl groups where one or more of the hydrogen atoms are replaced by for example, alkyl groups, alkynyl groups, halogens, hydroxyl, alkylcarbonyloxy, arylcarbonyloxy, alkoxycarbonyloxy, aryloxycarbonyloxy, carboxylate, alkylcarbonyl, arylcarbonyl, alkoxycarbonyl, aminocarbonyl, alkylaminocarbonyl, dialkylaminocarbonyl, alkylthiocarbonyl, alkoxyl, phosphate, phosphonato, phosphinato, cyano, amino (including alkyl amino, dialkylamino, arylamino, diaryla
- acylamino includes moieties wherein an acyl moiety is bonded to an amino group.
- the term includes alkylcarbonylamino, arylcarbonylamino, carbamoyl and ureido groups.
- alkoxy includes substituted and unsubstituted alkyl, alkenyl, and alkynyl groups covalently linked to an oxygen atom. Examples of alkoxy groups include methoxy, ethoxy, isopropyloxy, propoxy, butoxy, and pentoxy groups and may include cyclic groups such as cyclopentoxy. Examples of substituted alkoxy groups include halogenated alkoxy groups.
- the alkoxy groups can be substituted with groups such as alkenyl, alkynyl, halogen, hydroxyl, alkylcarbonyloxy, arylcarbonyloxy, alkoxycarbonyloxy, aryloxycarbonyloxy, carboxylate, alkylcarbonyl, arylcarbonyl, alkoxycarbonyl, aminocarbonyl, alkylaminocarbonyl, dialkylaminocarbonyl, alkylthiocarbonyl, alkoxyl, phosphate, phosphonato, phosphinato, cyano, amino (including alkyl amino, dialkylamino, arylamino, diarylamino, and alkylarylamino), acylamino (including alkylcarbonylamino, arylcarbonylamino, carbamoyl and ureido), amidino, imino, sulfhydryl, alkylthio, arylthio, thiocarboxylate
- halogen substituted alkoxy groups include, but are not limited to, fluoromethoxy, difluoromethoxy, trifluoromethoxy, chloromethoxy, dichloromethoxy, trichloromethoxy, etc.
- carbonyl or “carboxy” includes compounds and moieties which contain a carbon connected with a double bond to an oxygen atom, and tautomeric forms thereof. Examples of moieties that contain a carbonyl include aldehydes, ketones, carboxylic acids, amides, esters, anhydrides, etc.
- carboxy moiety refers to groups such as “alkylcarbonyl” groups wherein an alkyl group is covalently bound to a carbonyl group, “alkenylcarbonyl” groups wherein an alkenyl group is covalently bound to a carbonyl group, “alkynylcarbonyl” groups wherein an alkynyl group is covalently bound to a carbonyl group, “arylcarbonyl” groups wherein an aryl group is covalently attached to the carbonyl group.
- the term also refers to groups wherein one or more heteroatoms are covalently bonded to the carbonyl moiety.
- the term includes moieties such as, for example, aminocarbonyl moieties, (wherein a nitrogen atom is bound to the carbon of the carbonyl group, e.g., an amide), aminocarbonyloxy moieties, wherein an oxygen and a nitrogen atom are both bond to the carbon of the carbonyl group (e.g., also referred to as a “carbamate”).
- aminocarbonylamino groups e.g., ureas
- heteroatoms e.g., nitrogen, oxygen, sulfur, etc. as well as carbon atoms.
- heteroatom can be further substituted with one or more alkyl, alkenyl, alkynyl, aryl, aralkyl, acyl, etc. moieties.
- thiocarbonyl or “thiocarboxy” includes compounds and moieties which contain a carbon connected with a double bond to a sulfur atom.
- thiocarbonyl moiety includes moieties that are analogous to carbonyl moieties.
- thiocarbonyl moieties include aminothiocarbonyl, wherein an amino group is bound to the carbon atom of the thiocarbonyl group, furthermore other thiocarbonyl moieties include, oxythiocarbonyls (oxygen bound to the carbon atom), aminothiocarbonylamino groups, etc.
- ether includes compounds or moieties that contain an oxygen bonded to two different carbon atoms or heteroatoms.
- alkoxyalkyl which refers to an alkyl, alkenyl, or alkynyl group covalently bonded to an oxygen atom that is covalently bonded to another alkyl group.
- esters includes compounds and moieties that contain a carbon or a heteroatom bound to an oxygen atom that is bonded to the carbon of a carbonyl group.
- ester includes alkoxycarboxy groups such as methoxycarbonyl, ethoxycarbonyl, propoxycarbonyl, butoxycarbonyl, pentoxycarbonyl, etc.
- the alkyl, alkenyl, or alkynyl groups are as defined above.
- thioether includes compounds and moieties which contain a sulfur atom bonded to two different carbon or hetero atoms.
- thioethers include, but are not limited to alkthioalkyls, alkthioalkenyls, and alkthioalkynyls.
- alkthioalkyls include compounds with an alkyl, alkenyl, or alkynyl group bonded to a sulfur atom that is bonded to an alkyl group.
- alkthioalkenyls and alkthioalkynyls refer to compounds or moieties wherein an alkyl, alkenyl, or alkynyl group is bonded to a sulfur atom which is covalently bonded to an alkynyl group.
- hydroxy or “hydroxyl” includes groups with an —OH or —O ⁇ .
- polycyclyl or “polycyclic radical” include moieties with two or more rings (e.g., cycloalkyls, cycloalkenyls, cycloalkynyls, aryls and/or heterocyclyls) in which two or more carbons are common to two adjoining rings, e.g., the rings are “fused rings”. Rings that are joined through non-adjacent atoms are termed “bridged” rings.
- Each of the rings of the polycycle can be substituted with such substituents as described above, as for example, halogen, hydroxyl, alkylcarbonyloxy, arylcarbonyloxy, alkoxycarbonyloxy, aryloxycarbonyloxy, carboxylate, alkylcarbonyl, alkoxycarbonyl, alkylaminoacarbonyl, aralkylaminocarbonyl, alkenylaminocarbonyl, alkylcarbonyl, arylcarbonyl, aralkylcarbonyl, alkenylcarbonyl, aminocarbonyl, alkylthiocarbonyl, alkoxyl, phosphate, phosphonato, phosphinato, cyano, amino (including alkyl amino, dialkylamino, arylamino, diarylamino, and alkylarylamino), acylamino (including alkylcarbonylamino, arylcarbonylamino, carbamoyl and urei
- bonds between adjacent atoms and/or hydrogens as required to satisfy the valence of each atom, as would be understand by those having an ordinary level of skill in the art. Bonds and/or hydrogen atoms are added, if necessary, to provide the following number of total bonds to each of the following types of atoms: carbon: four bonds; nitrogen: three bonds; oxygen: two bonds; and sulfur: two-six bonds.
- salt of a compound relates to corresponding salt prepared by using acid selected from the group of mineral acids, such as hydrochloric acid, hydrobromic acid, phosphoric acid, metaphosphoric acid, nitric acid and sulphuric acid, and organic acids, such as tartaric acid, acetic acid, trifluoroacetic acid, citric acid, malic acid, lactic acid, fumaric acid, benzoic acid, glycolic acid, gluconic acid and succinic acid, and alkylsulphonic acids such as methanesulphonic, ethanesulphonic acids, ethane- 1,2-disulfonic acid and 2-hydroxyethanesulfonic acid and arylsulphonic acids such as benzene sulfonic acid, 2-naphthalenesulfonic acid, p-toluenesulphonic acid and naphthalene- 1,5-disulfonic acid.
- mineral acids such as hydrochloric acid, hydrobromic acid, phosphoric acid,
- phrases, “pharmaceutically effective amount” as used herein indicates an amount necessary to administer to a host, or to a cell, tissue, or organ of a host, to achieve a therapeutic result, such as the regulating, modulating, or inhibiting protein kinase activity, e.g., inhibition of the activity of a protein kinase, or treatment of cancer.
- a physician or veterinarian having ordinary skill in the art can readily determine and prescribe the effective amount of the pharmaceutical composition required.
- the physician or veterinarian could start doses of the compounds of the invention employed in the pharmaceutical composition at levels lower than that required in order to achieve the desired therapeutic effect and gradually increase the dosage until the desired effect is achieved.
- the term “about” means having a value falling within an accepted standard of error of the mean, when considered by one of ordinary skill in the art. As would be expected, the meaning of “about” depends on the context in which it is used. Frequently, the term “about” may refer to ⁇ 5%, and preferably ⁇ 2.5%, and more preferably ⁇ 1% of the value or range to which it refers. For example, in the context of weight fractions, the phrase “about 20%” may mean 20% ⁇ 5%, preferably 20% ⁇ 2.5%, and more preferably 20% ⁇ 1%.
- the terms “treat,” “treated,” “treating,” and “treatment” include the diminishment or alleviation of at least one symptom associated or caused by the state, disorder or disease being treated, in particular, cancer.
- the treatment comprises diminishing and/or alleviating at least one symptom associated with or caused by the cancer being treated, by the compound of the invention.
- treatment can be diminishment of one or several symptoms of a cancer or complete eradication of a cancer.
- the compounds described herein include what this disclosure refers to as a fatty acid moiety.
- a fatty acid is a carboxylic acid with an aliphatic chain, which may be saturated or unsaturated, although saturated chains are preferred.
- saturated fatty acids examples include lauric acid (CH 3 (CH 2 ) 10 COOH), palmitic acid (CH 3 (CH 2 ) 14 COOH), stearic acid (CH 3 (CH 2 ) 16 COOH), and myristic acid (CH 3 (CH 2 ) 12 COOH).
- References may also be made to the salt or ester of a fatty acid, as well as its fatty amide moiety, but for simplicity these are included in the meaning of fatty acid moiety as used herein.
- myristic acid may be referred to as myristate, and oleic acid may be referred to as oleate.
- a fatty acid moiety may also be a carboacyl of the fatty acid, i.e., a group formed by the loss of a hydroxide group of a carboxylic acid.
- a fatty acid moiety may be bonded to a therapeutic agent through an amide bond.
- a myristic acid conjugate may have a fatty acid moiety CH 3 (CH 2 ) 12 CO-NH-, where the tertiary nitrogen is bonded to the therapeutic agent: and n is an integer from 1 to 20, and is preferably 10 to 20.
- a first class of anti-cancer CDK 4/6 inhibitors are substituted pyrrolopyrimidine compounds, and pharmaceutically acceptable salts thereof. It should be appreciated that some compounds in the first class are derivatives of parent compound 7-cyclopentyl-N,N-dimethyl-2-[(5-piperazin-1-ylpyridin-2-yl)amino]pyrrolo[2,3- d]pyrimidine-6-carboxamide, also known as Ribociclib.
- R 4 is selected from the group consisting of hydrogen, C 1 -C 8 -alkyl, substituted C 1 - C 8 -alkyl, C 3 -C 8 -cycloalkyl, substituted C 3 -C 8 -cycloalkyl, aryl, substituted aryl, heteroaryl and substituted heteroaryl;
- Z is CR z in which R z is selected from the group consisting of halo, hydrogen, C 1 - C 3 -alkyl, C 1 -C 3 -alkoxy, CN, C ⁇ NOH, C ⁇ NOCH 3 , C(O)H, C(O)C 1 -C 3 -alkyl, C 3 -C 8 -cycloalkyl, heterocyclyl, aryl, heteroaryl, substitute
- salts may be prepared through using an acid selected from mineral acids, organic acids, alkylsulphonic acids, ethanesulphonic acids, and arylsulphonic acids, for example.
- a first class of anti-cancer CDK 4/6 inhibitors are compounds having the general formula [1B] shown below.
- R 4 is a C 5 -cycloalkyl
- Z is a dimethyl carboxamide or acetyl
- n represents an integer from 9 to 20, and more preferably from 12-20.
- This general formula’s parent compound is Ribociclib, an FDA- approved pharmaceutical used to treat HR-positive, HER2-negative advanced or metastatic breast cancers (with an aromatase inhibitor).
- embodiments of the present approach according to formula 1[A] have a C 11 -C 22 fatty acid moiety conjugated at the terminal piperazine.
- the fatty acid moiety is linear and saturated.
- the fatty acid moiety is one of lauric acid, myristic acid, palmitic acid, and stearic acid. The fatty acid moiety significantly improves the cellular uptake of the compound, greatly increasing its inhibition of cancer stem cell proliferation, and selectivity for tumor cells.
- Compound [1C] A demonstrative embodiment is shown below as Compound [1C], in which R 4 is unsubstituted C 5 -cycloalkyl, Z is a dimethyl carboxamide, and n is 12. As a result, this embodiment has a 14-carbon fatty acid (i.e., myristate) moiety.
- the compound shown as Compound [1C] has been synthesized and, in the mammosphere assay, showed remarkably improved inhibition of MCF7 cells compared to known anti-cancer therapeutic Ribociclib at concentrations from 1 ⁇ M to 100 ⁇ M, demonstrating the enormous impact the fatty acid moiety has on the compound.
- a first class of anti-cancer CDK 4/6 inhibitors are substituted pyrrolopyrimidine compounds as shown below in general formula [1D].
- R 4 is selected from the group consisting of hydrogen, C 1 -C 8 -alkyl, substituted C 1 - C 8 -alkyl, C 3 -C 8 -cycloalkyl, substituted C 3 -C 8 -cycloalkyl, aryl, substituted aryl, heteroaryl and substituted heteroaryl;
- R 3 is selected from the group consisting of hydrogen, OH, C 1 -C 8 -alkyl, substituted C 1 -C 8 -alkyl, C 3 -C 8 -cycloalkyl, C(O) C 1 -C 8 -alkyl, C 1 -C 8 -haloalkyl, C 1 -C 8 -cyanoalkyl, C 1 -C 8 -
- a first class of anti-cancer CDK 4/6 inhibitors are compounds having the general formula [1E] shown below.
- R 4 is a C 5 -cycloalkyl
- R 3 is hydrogen
- n represents an integer from 9 to 20, and more preferably from 10-20, and more preferably from 10-16.
- Compounds having the general formula [1E] are derivatives of Ribociclib, in which a fatty acid moiety replaces the dimethyl-amino group at the carboxyl.
- IC 50 (MCF7 mammosphere) refers to the half maximal inhibitory concentration in the 3D-mammosphere assay, using the ER+ breast cancer cell line, MCF7.
- IC 50 (MCF7 monolayer) refers to the half maximal inhibitory concentration in the 2D-cell viability assay, using the ER+ breast cancer cell line, MCF7.
- IC 50 (BJ1 monolayer) refers to the half maximal inhibitory concentration in the 2D-cell viability assay, using the immortalized non-tumoral fibroblast cell line, hTERT-BJ1.
- SI mammosphere/monolayer MCF7
- SI mammosphere/monolayer MCF7
- SI breastosphere/monolayer MCF7
- SI BJ1/MCF7 monolayer
- SI cancer selectivity index
- IC 50 values comparing the biological activity in the cell viability assays against MCF7 and hTERT-BJ1.
- Substituted pyridopyrimidine compounds [0076]
- the second class comprises substituted pyridopyrimidines, having a fatty acid moiety, as shown in general formula [2A] below.
- some embodiments in the second class comprise derivatives of 6-acetyl-8-cyclopentyl-5-methyl-2-(5-piperazin-1-yl- pyridin-2-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one, also known as Palbociclib.
- pharmaceutically acceptable salts may also be used, such as those identified above, as would be understood by those having an ordinary level of skill in the art.
- Other example salts include malate, tartate, bromide, hydrogen bromide dihydrate, hydrogen chloride, sulphate dihydrate, camsylate, napsylate, napsylate dihydrate, tosylate, citrate monohydrate, maleate, and oxalate.
- R 1 is hydrogen, aryl, C 1 -C 8 alkyl, C 1 -C 8 alkoxy, C 3 -C 7 cycloalkyl, or C 3 -C 7 - heterocyclyl;
- R 2 is independently selected from hydrogen, halogen, C 1 -C 8 alkyl, C 1 -C 8 acyl, C 3 - C 7 cycloalkyl, C 1 -C 8 alkoxy, C 1 -C 8 alkoxyalkyl, C 1 -C 8 haloalkyl, C 1 -C 8 hydroxyalkyl, C 2 - C 8 alkenyl, C 2 -C 8 alkynyl, nitrile, nitro, OR 5 , SR 5 , NR 5 R 6 , N(O)R 5 R 6 , P(O)(OR 5 )(OR 6 ), (CR 5 R 6 ) m NR 7 R 8 , COR 5 , (CR
- general formula [2B] Shown below as general formula [2B] is a general formula for preferred embodiments of the second class according to the present approach.
- R 1 is unsubstituted C 5 -cycloalkyl
- R 2 is C 1 -acyl (acetyl)
- R 3 is methyl
- n represents an integer from 9 to 20, and more preferably from 12-20.
- a demonstrative embodiment of the second class is shown below formulas Compound [2C], in which R 1 is unsubstituted C 6 -cycloalkyl, R 2 is C 1 -acyl (acetyl), R 3 is methyl, and n 12. As a result, this embodiment has a 14-carbon fatty acid (i.e., myristate) moiety.
- Compound [2C] has been synthesized and, in the mammosphere assay, showed remarkably improved inhibition of MCF7 cells compared to known anti-cancer therapeutic Palbociclib at concentrations from 1 ⁇ M to 100 ⁇ M.
- Fig.2 shows dose-response curves for Compound [2C] and its parent compound, and illustrates the improved CSC inhibition resulting from the addition of the fatty acid moiety. It should be appreciated that similar results are expected for other fatty acid moieties having as few as 11 carbons and as many as 22 carbons.
- the second class also comprises substituted pyridopyrimidines, having a fatty acid moiety, as shown in general formula [2D] below.
- R 1 is hydrogen, aryl, C 1 -C 8 alkyl, C 1 -C 8 alkoxy, C 3 -C 7 cycloalkyl, or C 3 -C 7 - heterocyclyl;
- R 2 is selected from hydrogen, halogen, C 1 -C 8 alkyl, C 1 -C 8 acyl, C 3 -C 7 cycloalkyl, C 1 -C 8 alkoxy, C 1 -C 8 alkoxyalkyl, C 1 -C 8 haloalkyl, C 1 -C 8 hydroxyalkyl, C 2 -C 8 alkenyl, C 2 - C 8 alkynyl, nitrile, nitro, OR 5 , SR 5 , NR 5
- R 1 is unsubstituted C 5 -cycloalkyl
- R 2 is H
- R 3 is methyl
- n represents an integer from 9 to 20, and more preferably from 12-20.
- a demonstrative embodiment of the second class is shown below formulas Compound [2F], in which R 1 is unsubstituted C 5 -cycloalkyl (e.g., cyclopentyl), R 2 is H, R 3 is methyl, and n 12. As a result, this embodiment has a 14-carbon fatty acid (i.e., myristate) moiety.
- Table 2, below summarizes results for various assays comparing Compound [2C] and its parent compound (Palbociclib), and contains the in vitro biological data for both compounds. The results show that Compound [2C] had a reduced potency in the 3D- mammosphere assay (IC 50 of about 5.1 vs.
- a third class comprises substituted benzimidazole compounds having the general formula [3A], shown below. It should also be appreciated that pharmaceutically acceptable salts may also be used, such as those identified above, as would be understood by those having an ordinary level of skill in the art.
- some embodiments in the third class comprise derivatives of N-[5-[(4-ethylpiperazin-1-yl)methyl]pyridin-2-yl]-5-fluoro-4-(7-fluoro-2- methyl-3-propan-2-ylbenzimidazol-5-yl) pyrimidin-2-amine), also known as Abemaciclib.
- compounds of the third class are also potent CDK 4/6 inhibitors.
- R 1 is a fatty acid moiety in which m is an integer from 0-4, and more preferably 0-2, such that when m is 0 there is a direct bond to the nitrogen in the piperazine, and n is an integer from 9-20, and more preferably from 12-20;
- R 2 is H or C 1 -C 3 alkyl;
- R 3 and R 4 are H or fluorine, and at least one of R 3 and R 4 is fluorine;
- R 5 is C 3 -C 5 alkyl, C 3 -C 5 cycloalkyl or cyclopropyl-methyl;
- R 6 is H or C 1 -C 3 alkyl; and
- X is a bond, C 1 -C 3 alkyl, O, or S.
- R 1 is s a fatty acid moiety in which m is an integer from 0-4, and more preferably 0- 2, such that when m is 0 there is a direct bond to the nitrogen in the piperazine, and n is an integer from 9-20, and more preferably from 12-20
- R 2 is H
- R 3 and R 4 are fluorine
- R 5 is C 3 alkyl (isobutyl)
- R 6 is methyl.
- R 1 is s a fatty acid moiety in which m is 0 and n is 12, R 2 is H, R 3 and R 4 are fluorine, R 5 is C 3 alkyl (isobutyl), and R 6 is methyl.
- n is from 9 to 20 are contemplated, and planned for evaluation.
- the embodiment shown as Compound [3C] is a derivative of Abemaciclib, a CDK 4/6 inhibiting compound approved by the FDA for advanced and metastatic breast cancer treatment.
- Compound [3C] and other compounds having the formula [3A] are anticipated to be effective at inhibiting CDK 4/6, making them particularly suitable for use as an anti-cancer therapeutic and selectively targeting and inhibiting cancer cells and CSCs, as described herein.
- R 1 is a fatty acid moiety in which m is nd n is 12, R 2 is H, R 3 2 a and R 4 are fluorine, R 5 is C 3 alkyl (isobutyl), and R 6 is methyl.
- this embodiment is expected to be more potent than Abemaciclib with respect to CDK 4/6 inhibition and selectivity, and is particularly suitable for use as an anti-cancer therapeutic as described herein.
- Table 3 below shows the in vitro biological data for Abemaciclib.
- the compound is already highly potent in the 3D-mammosphere assay (IC 50 of ⁇ 0.04 ⁇ M) prior to conjugation.
- Compounds having the formula [3A], including a variety of fatty acid moieties, are being evaluated.
- Table 3 that Abemaciclib is both highly specific and highly potent to CSCs.
- Abemaciclib may be used as a therapeutic agent to specifically target CSCs. Because of its selectivity, Abemaciclib may be used for treating and/or preventing tumor recurrence and/or metastasis, and for targeting circulating tumor cells.
- Figs.1-3 are dose-response curves for various compounds described herein, using the mammosphere assay.
- the assay was performed using the MCF7 cell line.
- the curves are plotted as a mean of two independent experiments, and the standard deviation for each point is represented by vertical bars.
- the inhibition percentage is shown as a function of the log of the concentration ( ⁇ M).
- FIG. 1 shows dose-response curves comparing Compound [1C] to its parent compound, Ribociclib, using the mammosphere formation assay on the MCF7 cell line.
- Fig. 4 shows dose-response curves comparing Compound [1C] to its parent compound, using the Hoechst staining assay on the MCF7 cell line.
- Compound [1C] is more potent against MCF7 cells at each concentration.
- Fig. 7 shows dose-response curves comparing Compound [1C] to its parent compound, using the Hoechst staining assay on the hTERT-BJ1 cell line. The parent compound was more potent at most concentrations tested, demonstrating that compounds having the general formula [1A], and in particular general formula [1B], are more selective towards CSCs. Similar effects are expected for compounds having the general formula [1D].
- the compounds of the present approach have efficacy for other types of cancer.
- the inventors demonstrated that mitochondrial biogenesis inhibitors successfully inhibited tumor- sphere formation in a wide-variety of cell lines from several tumor types.
- Table 4, below lists cancer cell lines that have been shown to be susceptible to mitochondrial biogenesis inhibitors. Given these results, the present approach is effective for numerous cancer types.
- the present approach describes pharmaceutical compositions comprising a therapeutically effective amount of a compound from the first class or the second class, or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable carrier, diluent, or excipient therefor.
- Compounds according to the present approach may be used as anti-cancer therapeutics.
- Pharmaceutically-effective amounts of a compound in a pharmaceutically-acceptable carrier may be administered to a subject according to means known in the art.
- a compound of the present approach may be used in conjunction with other cancer therapies, such as but not limited to chemotherapeutics, mitochondrial biogenesis inhibitors (e.g., mitoriboscins, mitoketoscins, repurposcins such as antimitoscins), radiation therapy, phototherapy, and caloric restriction.
- chemotherapeutics e.g., mitochondrial biogenesis inhibitors (e.g., mitoriboscins, mitoketoscins, repurposcins such as antimitoscins), radiation therapy, phototherapy, and caloric restriction.
- mitochondrial biogenesis inhibitors e.g., mitoriboscins, mitoketoscins, repurpos
- the pharmaceutical composition may be in a tablet, capsule, or pill.
- the pharmaceutical composition may have a dose of the therapeutic composition from 20 mg to 500 mg.
- the pharmaceutical composition may comprise a tablet having 200 mg of the therapeutic compound, e.g., a compound described above, such as Compound [1C].
- a tablet may contain a therapeutic compound content of at least about 35%, 40%, 45%, 50% or 55%, measured by w/w percentage of the therapeutic compound (as a free base) of the core tablet.
- the tablet may have a core formed of microcrystalline cellulose, crospovidone type A, low-substituted hydroxypropylcellulose, magnesium stearate, colloidal anhydrous silica.
- a tablet having 200 mg of the therapeutic compound may include an inner core having microcrystalline cellulose (67.44 mg), hydroxypropyl cellulose (48.12 mg), crospovidone (29.20 mg), colloidal silicon dioxide (anhydrous) (2.12 mg), and magnesium stearate (6.36 mg), and an outer core having crospovidone (12.84 mg), colloidal silicon dioxide (anhydrous) (1.06 mg), and magnesium stearate (8.46 mg).
- a tablet may have from about 10% to about 45% (w/w) of the therapeutic compound (e.g., Compound [2C]), and preferably about 18% to about 28% of the therapeutic compound; from about 4% to about 18% water-soluble acid; from about 20% to about 75% diluent; from about 5% to about 18% disintegrant; from about 0.2% to about 10% lubricant; and, optionally, glidant from about 0% to about 5%, and from about 0% to about 15% binder.
- the therapeutic compound e.g., Compound [2C]
- the tablet may have a film coating.
- the film coating may include iron oxide black, iron oxide red, soya lecithin, polyvinyl alcohol (partially hydrolysed), talc, titanium dioxide, and xanthan gum.
- the tablet may be coated using commercially available coating premixes, depending on the desired appearance of the final tablet.
- HPMC hydroxypropyl-methylcellulose
- Methods of treatment described herein are preferably carried out by administering a therapeutically effective amount of a compound from either the first class or the second class, to a subject in need of treatment.
- the compounds are readily synthesized using the reactions steps as described below, or alternate reaction steps may be used.
- the alternate reaction steps would be readily recognized by one of skill in the art after reviewing this disclosure, and include the reaction steps described “Comprehensive Organic Synthesis”, Trost, Fleming, Pergamon: 1991 and “Comprehensive organic Functional Group Transformations”, Katritky, Meth-Cohn, Rees, Pergamon:1995, and can be administered by a variety of routes, including orally and parenterally, and have little or no toxicity.
- NMM N-methylmorpholine
- DCM dichloromethane
- DMF dimethylformamide
- EtOAc ethylacetate
- NaHCO 3 sodium hydrogen carbonate
- Na 2 SO 4 sodium sulphate
- MeOH methanol
- Analytical LC-MS Waters Sunfire C1830x4.6mm column, with a gradient eluent of 3-97% acetonitrile/water containing 0.05% formic acid. Time: 0-6 minutes.
- Preparative HPLC LC Column: Phenomenex Kinetex 5 ⁇ m EVO C18100250x21.2mm. Gradient eluent: 40-95% acetonitrile/water containing 0.1% formic acid.
- MCF-7 human breast adenocarcinoma cell line
- ATCC American Type Culture Collection
- hTERT-BJ1 cells were from Clontech, Inc.
- MCF-7 and hTERT-BJ1 cells were grown in DMEM supplemented with 10% fetal bovine serum, GlutaMAX and 1% penicillin-streptomycin and incubated at 37C in a humidified 5% CO2 incubator. The medium was changed 2-3 times/week.
- Mammosphere formation assay A single cell suspension was prepared using enzymatic (1x Trypsin-EDTA, Sigma Aldrich, cat. #T3924), and manual disaggregation (25 gauge needle). Five thousand cells were plated with in mammosphere medium (DMEM- F12/B27/20ng/ml EGF/PenStrep), under non-adherent conditions, in six wells plates coated with 2-hydroxyethylmethacrylate (poly-HEMA, Sigma, cat. #P3932). Cells were grown for 5 days and maintained in a humidified incubator at 37°C at an atmospheric pressure in 5% (v/v) carbon dioxide/air.
- mammosphere medium DMEM- F12/B27/20ng/ml EGF/PenStrep
- poly-HEMA 2-hydroxyethylmethacrylate
- Mammosphere assays were performed in triplicate and repeated three times independently.
- a Hoechst-based viability assay was used to characterize the selectivity of compounds according to the present approach, for the preferential targeting of cancer cells. Briefly, MCF7 cell monolayers were treated with a compound at concentrations ranging from 1 ⁇ M to 100 ⁇ M, for a period of one day.
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Application Number | Priority Date | Filing Date | Title |
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CN202080091494.2A CN114901666A (en) | 2019-12-16 | 2020-12-15 | Selective CDK4/6 inhibitor type cancer therapeutic drug |
BR112022011758A BR112022011758A2 (en) | 2019-12-16 | 2020-12-15 | SELECTIVE CDK4/6 INHIBITOR CANCER THERAPY |
CR20220343A CR20220343A (en) | 2019-12-16 | 2020-12-15 | Selective cdk4/6 inhibitor cancer therapeutics |
KR1020227022839A KR20220113985A (en) | 2019-12-16 | 2020-12-15 | Selective CDK 4/6 Inhibitor Cancer Therapeutics |
EP20902787.9A EP4077331A4 (en) | 2019-12-16 | 2020-12-15 | Selective cdk4/6 inhibitor cancer therapeutics |
MX2022007487A MX2022007487A (en) | 2019-12-16 | 2020-12-15 | Selective cdk4/6 inhibitor cancer therapeutics. |
IL293940A IL293940A (en) | 2019-12-16 | 2020-12-15 | Selective cdk4/6 inhibitor cancer therapeutics |
US17/786,189 US20230043357A1 (en) | 2019-12-16 | 2020-12-15 | Selective cdk4/6 inhibitor cancer therapeutics |
CA3164617A CA3164617A1 (en) | 2019-12-16 | 2020-12-15 | Selective cdk4/6 inhibitor cancer therapeutics |
JP2022537043A JP2023507140A (en) | 2019-12-16 | 2020-12-15 | Selective CDK4/6 inhibitor cancer therapeutic agent |
PCT/IB2020/061972 WO2021124106A1 (en) | 2019-12-16 | 2020-12-15 | Selective cdk4/6 inhibitor cancer therapeutics |
AU2020405427A AU2020405427A1 (en) | 2019-12-16 | 2020-12-15 | Selective CDK4/6 inhibitor cancer therapeutics |
ZA2022/07449A ZA202207449B (en) | 2019-12-16 | 2022-07-05 | Selective cdk4/6 inhibitor cancer therapeutics |
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US62/966,834 | 2020-01-28 | ||
PCT/IB2020/061972 WO2021124106A1 (en) | 2019-12-16 | 2020-12-15 | Selective cdk4/6 inhibitor cancer therapeutics |
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EP (1) | EP4077331A4 (en) |
JP (1) | JP2023507140A (en) |
KR (1) | KR20220113985A (en) |
CN (1) | CN114901666A (en) |
AU (1) | AU2020405427A1 (en) |
BR (1) | BR112022011758A2 (en) |
CA (1) | CA3164617A1 (en) |
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Citations (5)
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WO2007140222A2 (en) * | 2006-05-26 | 2007-12-06 | Novartis Ag | Pyrrolopyrimidine compounds and their uses |
WO2010020675A1 (en) | 2008-08-22 | 2010-02-25 | Novartis Ag | Pyrrolopyrimidine compounds as cdk inhibitors |
WO2011130232A1 (en) * | 2010-04-13 | 2011-10-20 | Novartis Ag | Combination comprising a cyclin dependent kinase 4 or cyclin dependent kinase (cdk4/6) inhibitor and an mtor inhibitor for treating cancer |
WO2016166703A1 (en) | 2015-04-16 | 2016-10-20 | Novartis Ag | Ribociclib tablet |
WO2016193860A1 (en) | 2015-06-04 | 2016-12-08 | Pfizer Inc. | Solid dosage forms of palbociclib |
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EP3778590A4 (en) * | 2018-04-09 | 2021-12-22 | ShanghaiTech University | Protein degradation targeting compound, anti-tumor application, intermediate thereof and use of intermediate |
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WO2007140222A2 (en) * | 2006-05-26 | 2007-12-06 | Novartis Ag | Pyrrolopyrimidine compounds and their uses |
WO2010020675A1 (en) | 2008-08-22 | 2010-02-25 | Novartis Ag | Pyrrolopyrimidine compounds as cdk inhibitors |
WO2011130232A1 (en) * | 2010-04-13 | 2011-10-20 | Novartis Ag | Combination comprising a cyclin dependent kinase 4 or cyclin dependent kinase (cdk4/6) inhibitor and an mtor inhibitor for treating cancer |
WO2016166703A1 (en) | 2015-04-16 | 2016-10-20 | Novartis Ag | Ribociclib tablet |
WO2016193860A1 (en) | 2015-06-04 | 2016-12-08 | Pfizer Inc. | Solid dosage forms of palbociclib |
Non-Patent Citations (4)
Title |
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GUO Q. ET AL.: "Selective and novel cyclin-dependent kinases 4 inhibitor: synthesis and biological evaluation", MEDICINAL CHEMISTRY RESEARCH, vol. 27, no. 6, 20 April 2018 (2018-04-20), pages 1666 - 1678, XP036507312, ISSN: 1054-2523, DOI: 10.1007/s00044-018-2180-2 * |
KATRITKYMETH-COHNREES: "Comprehensive organic Functional Group Transformations", 1995, PERGAMON |
See also references of EP4077331A4 |
TROSTFLEMING: "Comprehensive Organic Synthesis", 1991, PERGAMON |
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CR20220343A (en) | 2023-02-28 |
AU2020405427A1 (en) | 2022-07-14 |
IL293940A (en) | 2022-08-01 |
CA3164617A1 (en) | 2021-06-24 |
BR112022011758A2 (en) | 2022-08-30 |
CN114901666A (en) | 2022-08-12 |
US20230043357A1 (en) | 2023-02-09 |
JP2023507140A (en) | 2023-02-21 |
MX2022007487A (en) | 2022-08-04 |
EP4077331A1 (en) | 2022-10-26 |
EP4077331A4 (en) | 2023-12-27 |
ZA202207449B (en) | 2023-12-20 |
KR20220113985A (en) | 2022-08-17 |
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