Classifications

• • 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
  • A61K31/13—Amines
  • A61K31/155—Amidines (), e.g. guanidine (H2N—C(=NH)—NH2), isourea (N=C(OH)—NH2), isothiourea (—N=C(SH)—NH2)
• • 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
  • A61K31/41—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
  • A61K31/4164—1,3-Diazoles
  • A61K31/4184—1,3-Diazoles condensed with carbocyclic rings, e.g. benzimidazoles
• • 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
  • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
  • A61K31/4353—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom ortho- or peri-condensed with heterocyclic ring systems
  • A61K31/4375—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom ortho- or peri-condensed with heterocyclic ring systems the heterocyclic ring system containing a six-membered ring having nitrogen as a ring heteroatom, e.g. quinolizines, naphthyridines, berberine, vincamine
• • 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
  • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
  • A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof
  • A61K31/445—Non condensed piperidines, e.g. piperocaine
  • A61K31/4523—Non condensed piperidines, e.g. piperocaine containing further heterocyclic ring 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
  • A61K31/506—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim not condensed and containing further heterocyclic rings
• • 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
  • A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
  • A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
• • 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
  • A61P35/02—Antineoplastic agents specific for leukemia
• • 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
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2300/00—Mixtures or combinations of active ingredients, wherein at least one active ingredient is fully defined in groups A61K31/00 - A61K41/00

Definitions

• c-KIT also known as KIT, CD117, and stem cell factor receptor
• KIT a transmembrane tyrosine kinase protein that acts as a type-III receptor.
• the c-KIT proto oncogene located on chromosome 4qll-2l, encodes the c-KIT receptor, whose ligand is the stem cell factor (SCF, steel factor, kit ligand, mast cell growth factor).
• SCF stem cell factor
• the receptor has tyrosine-protein kinase activity, and binding of the ligand SCF leads to the
• Tyrosine phosphorylation by protein tyrosine kinases is of particular importance in cellular signaling and can mediate signals for major cellular processes, such as proliferation, survival, differentiation, apoptosis, attachment, invasiveness and migration.
• GISTs gastrointestinal stromal tumors
• Most GISTs have primary activating mutations in the genes encoding the closely related RTKs c- KIT (75-80% of GIST) or PDGFRa (8% of the non-c-KIT mutated GIST), and gain-of- function mutations of the c-KIT gene and the expression of constitutively phosphorylated c- KIT are found in many GIST.
• c-KIT exon 11 mutations have been identified as primary mutations in approximately 65% of GISTs. Such JM domain mutations disrupt the autoinhibition mechanism of c-KIT kinase, leading to constitutive kinase activity and cell-transforming events causative of GIST.
• GIST most often become Gleevec® resistant, and molecularly targeted small molecule therapies that target c-KIT secondary mutations remain elusive.
• GIST patients who relapse after treatment with Gleevec® or Sutent® have disease still driven by c-KIT mutations.
• These secondary mutations occur on the same alleles as the primary JM-region mutation, and thus represent even more aggressive activated forms of c-KIT than the original primary mutation.
• These secondary mutants of c-KIT identified in GIST lead to acquired drug resistance. Secondary mutations are found in the ATP binding pocket (exon 13, i.e. K642E, V654A; exon 14, i.e. T670I), and activation loop (exon 17, i.e.
• Sunitinib malate (SutentTM, Pfizer) is an inhibitor of multiple RTKs, notably in this context, c-KIT and PDGFRa, and has been shown to be effective against certain imatinib-resistant c-KIT mutants, such as the ATP-binding pocket mutants V654A and T670I.
• Certain Gleevec ® -resistant mutants are also resistant to sunitinib, such as D816H and D816V which are located in the activation loop of the c-KIT catalytic domain encoded by exon 17. Median survival after progression due to Gleevec ® -resistance remains relatively short.
• the MAPKAP pathway is defined as the signaling through the kinases RAF - MEK - ERK. It has been unexpectedly demonstrated that combination of the c-KIT inhibitor Compound A or Compound B with a MEK inhibitor, including trametinib, an ERK inhibitor including ulixertinib, or a RAF inhibitor including LY3009120 leads to cell death, apoptosis, or prolonged cell stasis of GIST cells, enhanced GIST tumor regression in vivo, or eradication of GIST cells in colony formation assays as compared to a combination of imatinib with a MEK inhibitor or to single agent treatment with Compound A, imatinib, or a MEK inhibitor.
• a method of treating a tumor having one or more c-KIT mutations in a patient in need thereof comprising administering to the patient: an effective amount of l-[4-bromo-5-[l-ethyl-7-(methylamino)-2-oxo-l,2-dihydro-l,6- naphthyridin-3-yl]-2-fluorophenyl]-3-phenylurea, or a pharmaceutically acceptable salt thereof; and an effective amount of a mitogen-activated protein kinase inhibitor (MEK inhibitor) and/or an effective amount of an extracellular signal regulated kinase inhibitor (ERK inhibitor).
• MEK inhibitor mitogen-activated protein kinase inhibitor
• ERK inhibitor extracellular signal regulated kinase inhibitor
• This disclosure also provides a method of treating a solid tumor in an imatinib resistant patient, comprising: administering to the patient an effective amount of l-[4-bromo- 5-[l-ethyl-7-(methylamino)-2-oxo-l, 2-dihydro- l,6-naphthyridin-3-yl]-2-fluorophenyl]-3- phenylurea, or a pharmaceutically acceptable salt thereof; and administering to the patient an effective amount of a MEK or ERK inhibitor selected from the group consisting of trametinib, binimetinib, cobimetinib, and ulixertinib wherein the solid tumor is selected from the group consisting of of lung adenocarcinoma, squamous cell lung cancer, glioblastoma, pediatric glioma, astrocytoma, sarcoma, gastrointestinal stromal tumor (GIST), and mel
• a method of treating an imatinib resistant gastrointestinal stromal tumor or imatinib resistant melanoma in a patient in need thereof comprising administering to the patient an effective amount of l-[4-bromo-5-[l-ethyl-7- (methylamino)-2-oxo-l, 2-dihydro- l,6-naphthyridin-3-yl]-2-fluorophenyl]-3-phenylurea, or a pharmaceutically acceptable salt thereof; and administering to the patient an effective amount of a MEK or ERK inhibitor selected from the group consisting of trametinib, binimetinib, cobimetinib, and ulixertinib.
• This disclosure also provides a method of treating a solid tumor in a patient in need thereof, comprising: administering to the patient an effective amount of l-[4-bromo-5- [l-ethyl-7-(methylamino)-2-oxo-l,2-dihydro-l,6-naphthyridin-3-yl]-2-fluorophenyl]-3- phenylurea, or a pharmaceutically acceptable salt thereof; and administering to the patient an effective amount of a MEK or ERK inhibitor selected from the group consisting of trametinib, binimetinib, cobimetinib, and ulixertinib wherein the solid tumor is selected from the group consisting of of lung adenocarcinoma, squamous cell lung cancer, glioblastoma, pediatric glioma, astrocytoma, sarcoma, gastrointestinal stromal tumor (GIST), and melanoma
• a method of treating an gastrointestinal stromal tumor or melanoma in a patient in need thereof comprising administering to the patient an effective amount of l-[4-bromo-5-[l-ethyl-7-(methylamino)-2-oxo-l,2-dihydro-l,6- naphthyridin-3-yl]-2-fluorophenyl]-3-phenylurea, or a pharmaceutically acceptable salt thereof; and administering to the patient an effective amount of a MEK or ERK inhibitor selected from the group consisting of trametinib, binimetinib, cobimetinib, and ulixertinib.
• a method of treating a solid tumor in a patient need thereof comprising administering to the patient an effective amount of l-[4- bromo-5-[l-ethyl-7-(methylamino)-2-oxo-l,2-dihydro-l,6-naphthyridin-3-yl]-2- fluorophenyl]-3-phenylurea, or a pharmaceutically acceptable salt thereof; and administering to the patient an effective amount of a RAF inhibitor.
• Figure 1A shows a graphical representation of Caspase activity following various treatments with Compound A and trametinib for 24 hours in GIST-T1 cells.
• Figure 1B provides a synergy matrix chart based on the combination index method for various treatments with Compound A and trametinib for 24 hours in GIST-T1 cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 1C shows a graphical representation of Caspase activity following various treatments with Compound A and trametinib for 48 hours in GIST-T1 cells.
• Figure 1D provides a synergy matrix chart based on the combination index method for various treatments with Compound A and trametinib for 48 hours in GIST-T1 cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 1E shows a graphical representation of Caspase activity following various treatments with Compound A and trametinib for 24 hours in GIST-T1/D816E imatinib resistant cells.
• Figure 1F provides a synergy matrix chart based on the combination index method for various treatments with Compound A and trametinib for 24 hours in GIST- T1/D816E imatinib resistant cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 1G shows a graphical representation of Caspase activity following various treatments with Compound A and trametinib for 24 hours in GIST-T1/T670I imatinib resistant cells.
• Figure 1H provides a synergy matrix chart based on the combination index method for various treatments with Compound A and trametinib for 24 hours in GIST- T1/T670I imatinib resistant cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 2A shows a graphical representation of Caspase activity following various treatments with Compound B and trametinib for 24 hours in GIST-T1 cells.
• Figure 2B provides a synergy matrix chart based on the combination index method for various treatments with Compound B and trametinib for 24 hours in GIST-T1 cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 2C shows a graphical representation of Caspase activity following various treatments with Compound B and trametinib for 24 hours in GIST-T1/D816E imatinib resistant cells.
• Figure 2D provides a synergy matrix chart based on the combination index method for various treatments with Compound B and trametinib for 24 hours in GIST- T1/D816E imatinib resistant cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 2E shows a graphical representation of Caspase activity following various treatments with Compound B and trametinib for 24 hours in GIST-T1/T670I imatinib resistant cells.
• Figure 2F provides a synergy matrix chart based on the combination index method for various treatments with Compound B and trametinib for 24 hours in GIST- T1/T670I imatinib resistant cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 3A shows a graphical representation of Caspase activity following various treatments with Compound A and binimetinib for 24 hours in GIST-T1 cells.
• Figure 3B provides a synergy matrix chart based on the combination index method for various treatments with Compound A and binimetinib for 24 hours of GIST-T1 cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 3C shows a graphical representation of Caspase activity following various treatments with Compound A and binimetinib for 24 hours in GIST-T1/D816E imatinib resistant cells.
• Figure 3D provides a synergy matrix chart based on the combination index method for various treatments with Compound A and binimetinib for 24 hours in GIST- T1/D816E imatinib resistant cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 3E shows a graphical representation of Caspase activity following various treatments with Compound A and binimetinib for 24 hours in GIST-T1/T670I imatinib resistant cells.
• Figure 3F provides a synergy matrix chart based on the combination index method for various treatments with Compound A and binimetinib for 24 hours in GIST- T1/T670I imatinib resistant cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 4A shows a graphical representation of Caspase activity following various treatments with Compound B and binimetinib for 24 hours in GIST-T1 cells.
• Figure 4B provides a synergy matrix chart based on the combination index method for various treatments with Compound B and binimetinib for 24 hours in GIST-T1 cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 4C shows a graphical representation of Caspase activity following various treatments with Compound B and binimetinib for 24 hours in GIST-T1/D816E imatinib resistant cells.
• Figure 4D provides a synergy matrix chart based on the combination index method for various treatments with Compound B and binimetinib for 24 hours in GIST- T1/D816E imatinib resistant cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 4E shows a graphical representation of Caspase activity following various treatments with Compound B and binimetinib for 24 hours in GIST-T1/T670I imatinib resistant cells.
• Figure 4F provides a synergy matrix chart based on the combination index method for various treatments with Compound B and binimetinib for 24 hours in GIST- T1/T670I imatinib resistant cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 5A shows a graphical representation of Caspase activity following various treatments with Compound A and cobimetinib for 24 hours in GIST-T1 cells.
• Figure 5B provides a synergy matrix chart based on the combination index method for various treatments with Compound A and cobimetinib for 24 hours in GIST-T1 cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 5C shows a graphical representation of Caspase activity following various treatments with Compound A and cobimetinib for 24 hours in GIST-T1/D816E imatinib resistant cells.
• Figure 5D provides a synergy matrix chart based on the combination index method for various treatments with Compound A and cobimetinib for 24 hours in GIST- T1/D816E imatinib resistant cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 5E shows a graphical representation of Caspase activity following various treatments with Compound A and cobimetinib for 24 hours in GIST-T1/T670I imatinib resistant cells.
• Figure 5F provides a synergy matrix chart based on the combination index method for various treatments with Compound A and cobimetinib for 24 hours in GIST- T1/T670I imatinib resistant cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 6A shows a graphical representation of Caspase activity following various treatments with Compound B and cobimetinib for 24 hours in GIST-T1 cells.
• Figure 6B provides a synergy matrix chart based on the combination index method for various treatments with Compound B and cobimetinib for 24 hours of GIST-T1 cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 6C shows a graphical representation of Caspase activity following various treatments with Compound B and cobimetinib for 24 hours in GIST-T1/D816E imatinib resistant cells.
• Figure 6D provides a synergy matrix chart based on the combination index method for various treatments with Compound B and cobimetinib for 24 hours in GIST- T1/D816E imatinib resistant cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 6E shows a graphical representation of Caspase activity following various treatments with Compound B and cobimetinib for 24 hours in GIST-T1/T670I imatinib resistant cells.
• Figure 6F provides a synergy matrix chart based on the combination index method for various treatments with Compound B and cobimetinib for 24 hours in GIST- T1/T670I imatinib resistant cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 7A shows a graphical representation of Caspase activity following various treatments with Compound A and the ERK inhibitor ulixertinib for 24 hours in GIST-T1 cells.
• Figure 7B provides a synergy matrix chart based on the combination index method for various treatments with Compound A and ulixertinib for 24 hours in GIST-T1 cells and a Combination Index Plot demonstrating synergy graphed as combination index (Cl) on the y-axis and Fraction affected (Fa) on the x-axis.
• Figure 7C shows a graphical representation of Caspase activity following various treatments with Compound A and ulixertinib for 24 hours in GIST-T1/T670I imatinib resistant cells.
• Figure 7D provides a synergy matrix chart based on the combination index method for various treatments with Compound A and ulixertinib for 24 hours in GIST- T1/T670I imatinib resistant cells
• Figure 8A shows images of representative culture plates and a graphical representation of the number of GIST-T1 colonies counted following various treatments with Compound A, imatinib, and trametinib for 2 weeks followed by a 9 day recovery period.
• Figure 8B shows images of representative culture plates and a graphical representation of the number of GIST-T1/D816E colonies counted following various treatments with Compound A, imatinib, and trametinib for 2 weeks followed by a 10 day recovery period.
• the right upper panel shows representative culture plates after additional 10 days of recovery.
• Figure 8C shows images of representative culture plates and a graphical representation of the number of GIST-T1/D816E colonies counted following various treatments with Compound A, imatinib (IM), and trametinib for 2 weeks followed by a 10 day recovery period.
• Figure 8D shows images of representative culture plates and a graphical representation of the number of GIST-T1/T670I colonies counted following various treatments with Compound A, imatinib, and trametinib for 2 weeks followed by a 10 day recovery period.
• Figure 9A shows images of representative culture plates and a graphical representation of the number of GIST-T1 colonies counted following various treatments with Compound B and trametinib for 2 weeks followed by a 10 day recovery period.
• Figure 9B shows images of representative culture plates and a graphical representation of the number of GIST-T1/D816E colonies counted following various treatments with Compound B and trametinib for 2 weeks followed by a 10 day recovery period.
• the right upper panel shows representative culture plates after additional 10 days of recovery.
• Figure 9C shows images of representative culture plates showing the number of GIST-T1/T670I colonies counted following various treatments with Compound B and trametinib for 2 weeks followed by a 10 day recovery period.
• Figure 10A shows images of representative culture plates and a graphical representation of the number of GIST-T1 colonies counted following various treatments with Compound A, imatinib, and binimetinib for 2 weeks followed by a 10 day recovery period.
• the right upper panel shows representative culture plates after additional 10 days of recovery.
• Figure 10B shows images of representative culture plates and a graphical representation of the number of GIST-T1/D816E colonies counted following various treatments with Compound A, imatinib, and binimetinib for 2 weeks followed by a 10 day recovery period.
• the right upper panel shows representative culture plates after additional 10 days of recovery.
• Figure 10C shows images of representative culture plates and a graphical representation of the number of GIST-T1/T670I colonies counted following various treatments with Compound A, imatinib, and binimetinib for 2 weeks followed by a 10 day recovery period.
• the right upper panel shows representative culture plates after additional 10 days of recovery.
• Figure 11A shows images of representative culture plates and a graphical representation of the number of GIST-T1 colonies counted following various treatments with Compound B and binimetinib for 2 weeks followed by a 10 day recovery period.
• the right upper panel shows representative culture plates after additional 10 days of recovery.
• Figure 11B shows images of representative culture plates and a graphical representation of the number of GIST-T1/D816E colonies counted following various treatments with Compound B and binimetinib for 2 weeks followed by a 10 day recovery period.
• the right upper panel shows representative culture plates after additional 10 days of recovery.
• Figure 11C shows images of representative culture plates showing the number of GIST-T1/D816E colonies counted following various treatments with Compound B and binimetinib for 2 weeks followed by a 10 day recovery period.
• the right upper panel shows representative culture plates after additional 10 days of recovery.
• Figure 12A shows images of representative culture plates and a graphical representation of the number of GIST-T1 colonies counted following various treatments with Compound A, imatinib, and cobimetinib for 2 weeks followed by a 10 day recovery period.
• the right upper panel shows representative culture plates after additional 10 days of recovery.
• Figure 12B shows images of representative culture plates and a graphical representation of the number of GIST-T1/D816E colonies counted following various treatments with Compound A, imatinib, and cobimetinib for 2 weeks followed by a 10 day recovery period.
• the right upper panel shows representative culture plates after additional 10 days of recovery.
• Figure 12C shows images of representative culture plates and a graphical representation of the number of GIST-T1/T670I colonies counted following various treatments with Compound A, imatinib, and cobimetinib for 2 weeks followed by a 10 day recovery period.
• the right upper panel shows representative culture plates after additional 10 days of recovery.
• Figure 13A shows images of representative culture plates and a graphical representation of the number of GIST-T1 colonies counted following various treatments with Compound B and cobimetinib for 2 weeks followed by a 10 day recovery period. The right upper panel shows representative culture plates after additional 10 days of recovery.
• Figure 13B shows images of representative culture plates and a graphical representation of the number of GIST-T1/D816E colonies counted following various treatments with Compound B and cobimetinib for 2 weeks followed by a 10 day recovery period. The right upper panel shows representative culture plates after additional 10 days of recovery.
• Figure 13C shows images of representative culture plates showing the number of GIST-T1/T670I colonies counted following various treatments with Compound B and cobimetinib for 2 weeks followed by a 10 day recovery period.
• the right upper panel shows representative culture plates after additional 10 days of recovery.
• Figure 14A shows images of representative culture plates and a graphical representation of the number of GIST-T1 colonies counted following various treatments with Compound A and the ERK inhibitor ulixertinib for 2 weeks followed by a 10 day recovery period.
• Figure 14B shows images of representative culture plates and a graphical representation of the number of GIST-T1/D816E colonies counted following various treatments with Compound A and ulixertinib for 2 weeks followed by a 10 day recovery period.
• Figure 14C shows images of representative culture plates and a graphical representation of the number of GIST-T1/T670I colonies counted following various treatments with Compound A and ulixertinib for 2 weeks followed by a 10 day recovery period.
• the right upper panel shows representative culture plates after additional 10 days of recovery.
• Figure 15 shows images of representative culture plates and a graphical representation of the number of GIST-T1/D816E colonies counted following various treatments with Compound B and ulixertinib for 2 weeks.
• Figure 16A shows graphical representations of Caspase activity from various treatments with Compound A and trametinib for 48 hours in vector control or N-ras G12D transfected GIST-T1 cells.
• Figure 16B shows images of representative culture plates of vector control ( Figure 16B.1) or N-ras G12D ( Figure 16B.2) transfected GIST-T1 colonies following various treatments with Compound A, imatinib, and trametinib and a subsequent 10 day recovery period.
• Figure 16C shows a graphical representation of the number of vector control ( Figure 16C.1) or N-ras G12D ( Figure 16C.2) transfected GIST-T1 colonies counted following various treatments treatments with Compound A, imatinib, and trametinib and a subsequent 10 day recovery period.
• Figure 16D shows images of representative culture plates of N-ras G12D transfected GIST-T1 colonies following various treatments with Compound A and trametinib and a subsequent extended 21 day recovery period.
• Figure 17A provides graphical representations of Ba/F3 V560D KIT cell outgrowth of c-KIT secondary mutations in T670I, K807E, or D816V, or cell outgrowth retaining only the original c-KIT V560D mutation plus additional non-c-KIT resistance mechanisms upon saturation mutagenesis followed by single agent treatments with either imatinib (left panel) or Compound A (right panel).
• Figure 17B provides graphical representations of Ba/F3 V560D KIT cell outgrowth of c-KIT secondary mutations in T670I, K807E, or D816V, or cell outgrowth retaining only the original c-KIT V560D mutation plus additional non-c-KIT resistance mechanisms upon saturation mutagenesis followed by combination treatments with either imatinib plus trametinib (left panel) or Compound A plus trametinib (right panel).
• Figure 18A provides a graphical representation of GIST Tl xenograft tumor growth following treatments with single agent Compound A, single agent trametinib, or with a combination of Compound A and trametinib.
• Figure 18B is a blow up of the graphical representation from Figure 18 A, showing resolution of effects on tumor regression following treatments with single agent Compound A, single agent trametinib, or with a combination of Compound A and trametinib.
• c-KIT inhibitors only inhibit certain mutant forms of c-KIT, such as the prominent exon 11 mutation observed in GIST.
• Other mutant forms of c-KIT appear resistant to many c-KIT inhibitors, and these often arise as secondary mutations in exons 13, 14, 17 and 18 that render a tumor resistant to treatment with c-KIT inhibitors.
• the present disclosure provides methods of treating tumors, e.g., c-KIT-mediated tumors such as GIST, by inhibiting both c-KIT and a MAPKAP pathway kinase using a c-KIT inhibitor disclosed herein as Compound A or a pharmaceutically acceptable salt thereof or Compound B or a pharmaceutically acceptable salt thereof.
• Compound A and Compound B synergize with a MEK inhibitor, a ERK inhibitor, or a RAF inhibitor to induce cell death, apoptosis, or prolonged cell stasis of GIST cells, to induce eradication of tumor cells to the limit of detection, to reduce tumor volume, to inhibit tumor regrowth and/or to lead to enhanced cell death, apoptosis, cell stasis, or eradication to the limit of detection, of GIST cancer cell lines that are resistant to imatinib in combination with a MAPKAP kinase inhibitor.
• Compound A exhibits superior potency and synergy in combination with MEK inhibition compared to imatinib in combination with MEK inhibition in GIST cells containing c-KIT resistance mutations. Further, the level of potency and synergy and the degree of GIST tumor cell prolonged cell stasis or eradication of Compound A in combination with MEK inhibition is superior to that of imatinib in combination with MEK inhibition even in cell lines known to be sensitive to imatinib.
• Compound A is able to inhibit a wider range of mutant forms of c-KIT than previous c-KIT inhibitors, including imatinib, in GIST cells possibly through mechanisms that include the inhibition of drug efflux pumps, including the BCRP efflux pump, within tumor cells, e.g., GIST cells.
• Imatinib is a substrate for the BCRP efflux pump, leading to lower intracellular concentrations in tumor cells where this efflux pump is present (Eechoute, K, et al, Clin Cancer Res. 2015, 17, 406-15).
• Compound A is a potent inhibitor of the BCRP efflux transporter, exhibiting an IC50 value of 40nM.
• the present disclosure provides methods for inducing prolonged tumor cell stasis, inducing cell death, inducing apoptosis of tumor cells, inducing eradication of tumor cells, inducing tumor regression, reducing tumor volume, inhibiting tumor regrowth, or inhibiting the growth of resistant tumor cells, the methods comprising administering to a patient in need thereof an effective amount of: (i)l-[4-bromo- 5-[l-ethyl-7-(methylamino)-2-oxo-l, 2-dihydro- 1, 6-naphthyridin-3-yl]-2-fluorophenyl]-3- phenylurea or a pharmaceutically acceptable salt thereof, or l-(5-(7-amino-l-ethyl-2-oxo-l,2- dihydro-l,6-naphthyridin-3-yl)-4-bromo-2-fluorophenyl)-3-phenyl
• Compounds A and B as used herein refer to l-[4-bromo-5-[l-ethyl-7- (methylamino)-2-oxo-l, 2-dihydro- l,6-naphthyridin-3-yl]-2-fluorophenyl]-3-phenylurea and l-(5-(7-amino-l-ethyl-2-oxo-l, 2-dihydro- l,6-naphthyridin-3-yl)-4-bromo-2-fluorophenyl)-3- phenylurea, respectively.
• Pharmaceutically acceptable salts, tautomers, hydrates, and solvates, of Compounds A and B are also contemplated in this disclosure.
• the structures of Compounds A and B are represented below:
• “Pharmaceutically acceptable carrier, diluent or excipient” includes without limitation any adjuvant, carrier, excipient, glidant, sweetening agent, diluent, preservative, dye/colorant, flavor enhancer, surfactant, wetting agent, dispersing agent, suspending agent, stabilizer, isotonic agent, solvent, or emulsifier which has been approved by the United States Food and Drug Administration as being acceptable for use in humans or domestic animals.
• “Pharmaceutically acceptable salt” includes acid addition salts.
• “Pharmaceutically acceptable acid addition salt” refers to those salts which retain the biological effectiveness and properties of the free bases, which are not biologically or otherwise undesirable, and which are formed with inorganic acids such as, but are not limited to, hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid and the like, and organic acids such as, but not limited to, acetic acid, 2,2-dichloroacetic acid, adipic acid, alginic acid, ascorbic acid, aspartic acid, benzenesulfonic acid, benzoic acid, 4- acetamidobenzoic acid, camphoric acid, camphor-lO-sulfonic acid, capric acid, caproic acid, caprylic acid, carbonic acid, cinnamic acid, citric acid, cyclamic acid, dodecylsulfuric acid, ethane- l,2-disulfonic acid, ethanesulfonic acid, 2-
• A“pharmaceutical composition” refers to a formulation of a compound described herein, e.g. , Compound A or a pharmaceutically acceptable salt thereof, and a medium generally accepted in the art for the delivery of the biologically active compound to mammals, e.g., humans.
• a medium includes all pharmaceutically acceptable carriers, diluents or excipients therefor.
• Subjects or patients "in need of treatment" with a combination therapy of the present disclosure include patients with diseases and/or conditions that can be treated with a combination disclosed herein to achieve a beneficial therapeutic result, e.g., a GIST patient.
• a beneficial outcome includes an objective response, increased progression free survival, increased survival, prolongation of stable disease, and/or a decrease in the severity of symptoms or delay in the onset of symptoms.
• a patient in need of treatment is suffering from a tumor growth or tumor progression; the patient is suffering from, but not limited to, lung adenocarcinoma, squamous cell lung cancer, glioblastoma, pediatric glioma, astrocytomas, sarcomas, melanoma or gastrointestinal stromal tumors.
• the effective amount of therapeutic agents used in a combination therapy is the amount of each of the therapeutic agents that is useful for treating or preventing a disease or disorder when used in the combination therapy, even if the amount of one or both of the therapeutic agents, in the absence of the other therapeutic agent, is ineffective to treat or prevent the disease or disorder.
• an effective amount is a quantity that results in prolonged cell stasis of GIST cells, cytocidal GIST cell killing, apoptosis of GIST cells, eradication of GIST cells, regression of a GIST, reduction of GIST tumor volume, inhibition of GIST regrowth, and/or leads to enhanced cell stasis, cell death, apoptosis, or eradication to the limit of detection, of GIST cancer cell lines that are resistant to imatinib in combination with a MEK inhibitor, and/or a leads to a beneficial clinical outcome of the condition being treated with the compound compared with the absence of treatment.
• the “effective amount” can vary depending upon the mode of administration, specific locus of the disease or disorder, and the age, body weight, and general health of the subject.
• the amount of the compounds administered will depend on the degree, severity, and type of the disease or condition, the amount of therapy desired, and the release characteristics of the pharmaceutical formulation(s). It will also depend on the subject's health, size, weight, age, sex and tolerance to drugs. Typically, the compounds are administered for a sufficient period of time to achieve the desired therapeutic effect.
• treatment is meant to include the full spectrum of intervention in patients with“cancer” with the intention to induce prolonged cell stasis of GIST cells, to induce cytocidal GIST cell killing, to induce apoptosis of GIST cells, to induce eradication of GIST tumor cells to the limit of visual detection as determined by 5X objective microscopy, to cause regression of a GIST tumor in a patient, to reduce GIST tumor volume, to inhibit GIST regrowth, and/or to inhibit the growth of resistant GIST cells on a given treatment, such as administration of a combination therapy disclosed herein to alleviate, slow or reverse one or more of the symptoms and to induce regression of the GIST even if the GIST is not actually eliminated.
• treatment includes eliminating the disease or disorder, e.g., GISTs, entirely. Treating can be curing, improving, or at least partially ameliorating the disorder.
• cancer refers to a new growth which has the ability to invade surrounding tissues, metastasize (spread to other organs) and which may eventually lead to the patient's death if untreated.
• a cancer can be a solid tumor.
• Tumor refers to a mass. This is a term that may refer to benign (generally harmless) or malignant (cancerous) growths. Malignant growth can originate from a solid organ or the bone marrow.
• Tumor growth refers to growth of a mass caused by genomic alterations of a c-KIT gene, which may alter c-KIT protein expression and/or activity.
• Tumor progression refers to growth of an existing c-KIT dependent tumor, e.g., a GIST, wherein such growth of an existing mass may be caused by further genomic alterations of c-KIT resistant to a treatment.
• Tumor regression refers to a reduction in tumor size as determined by weight or volume as determined by RECIST 1.1 or Choi criteria.
• Eradication of an existing c-KIT-mediated tumor is defined as a“complete cytocidal cell killing” of a tumor to the limit of detection as determined by 5X objective microscopy for in vitro evaluations, or as defined as a complete response as determined by RECIST 1.1 or Choi criteria for in vivo preclinical or clinical evaluations without the possibility of regrowth of the tumor under preclinical or clinical conditions.
• “eradication of a c-KIT-mediated tumor” indicates that all cells of the c-KIT-mediated tumor are killed or removed to the limit of detection without the possibility of regrowth of the c-KIT-mediated tumor.
• Tumor regrowth refers to growth of a tumor that previously halted growth or regressed following a treatment, e.g., treatment with Gleevec® or Sutent®. In certain embodiments, tumor regrowth occurs due to the introduction of a c-Kit secondary mutation in a tumor cell. In other embodiments, tumor regrowth occurs due to the activation or mutation of a different signaling pathway, including but not limited to activation of the MAPKAP signaling pathway, which includes signaling through MEK kinases.
• Cell stasis refers to cells ceasing to divide and remaining in a dormant non-replicative state.
• Apoptosis refers to programmed cell death.
• Features of apoptosis detectable by histologic and histochemical methods include cell shrinkage;
• Apoptosis is primarily medated by the caspases, which are aspartate-specific serine proteases.
• Apoptosis can be induced via intrinsic genetic programming in response to various conditions, e.g., DNA damage or growth factor withdrawal, or apoptosis can be induced by extrinsic factors, such as injury to cellular DNA by irradiation and some cytotoxic agents used to treat cancer.
• Apoptosis typically does not occur or is compromised in malignant cells.
• apoptosis refers to programmed cell death as determined by increases in cleaved and activated caspase 3 and caspase 7.
• A“combination therapy” is a treatment that includes the administration of two or more therapeutic agents, e.g., Compound A and a MEK inhibitor, to a patient.
• the two or more therapeutic agents may be delivered at the same time, e.g., in separate pharmaceutical compositions or in the same pharmaceutical composition, or they may be delivered at different times. For example, they may be delivered concurrently or during overlapping time periods, and/or one therapeutic agent may be delivered before or after the other therapeutic agent(s).
• Treatment with a combination of a KIT inhibitor such as Compound A and a MEK inhibitor optionally includes treatment with either single agent, preceded or followed by a period of concurrent treatment with both agents. However, it is contemplated that during some time period, effective amounts of the two or more therapeutic agents are present within the patient.
• A“MAPKAP pathway inhibitor” is an inhibitor of the MAP kinase signaling pathway.
• Inhibitors of this pathway include RAS inhibitors, RAF inhibitors (e.g. dabrafenib, vemurafenib, LY3009120), MEK inhibitors (e.g. trametinib, binimetinib, cobimetinib), and ERK inhibitors (e.g. ulixertinib).
• RAS inhibitors RAF inhibitors
• MEK inhibitors e.g. trametinib, binimetinib, cobimetinib
• ERK inhibitors e.g. ulixertinib.
• the terms“MAPKAP pathway inhibitor” and“MAPKAP kinase inhibitor are used interchangeably herein.
• the compounds and compositions described herein can be used to treat tumors in a patient in need thereof.
• a method of treating a tumor having one or more c-KIT mutations in patient in need thereof comprising administering to the patient: an effective amount of l-[4-bromo-5-[l-ethyl-7-(methylamino)-2-oxo-l,2- dihydro-l,6-naphthyridin-3-yl]-2-fluorophenyl]-3-phenylurea, or a pharmaceutically acceptable salt thereof; and an effective amount of one or more MAPKAP kinase inhibitors.
• the MAPKAP kinase inhibitor is selected from the group consisting of a mitogen-activated protein kinase inhibitor (MEK inhibitor) and an effective amount of an extracellular signal regulated kinase inhibitor (ERK inhibitor).
• the c-KIT mutation can be a primary mutation in exon 9, exon 11, exon 13, or exon 17 of the c-KIT gene. In another embodiment, the c-KIT mutation is a deletion mutation.
• the tumor can have one or more secondary resistance mutations in the c-KIT gene.
• the secondary resistance mutation is in exon 13, exon 14, exon 17, or exon 18 of the c-KIT gene.
• the secondary resistance mutation is in exon 17 of the c-KIT gene.
• the secondary resistance mutation is the substitution of aspartic acid in codon 816 or the substitution of asparagine in codon 822.
• the secondary resistance mutation is one of D816V, D816E, D816H, D820A, T670I, or N822V.
• the secondary resistance mutation was acquired after previous administration of imatinib, sunitib or regorafenib, or a pharmaceutically acceptable salt thereof to the patient.
• Such a disclosed method further comprises determining if the tumor has the c- KIT secondary mutation. In some embodiments, determining if the tumor has the c-KIT secondary mutation comprises identifying mutations in DNA extracted from a tumor sample. In some embodiments, determining if the tumor has the c-KIT secondary mutation comprises identifying mutations in circulating tumor DNA. In another embodiment, the tumor was been resistant to treatment with imatinib mesylate, sunitinib malate, or regorafenib.
• the tumor can be selected from the group consisting of lung adenocarcinoma, squamous cell lung cancer, glioblastoma, pediatric glioma, astrocytoma, sarcoma, gastrointestinal stromal tumor (GIST), and melanoma.
• the tumor is melanoma.
• the tumor is GIST.
• the method may further comprise administering to the patient a cancer targeted therapeutic agent, cancer-targeted biological, immune checkpoint inhibitor, and/or chemotherapeutic agent.
• the method may also further comprise administering a RAF inhibitor to the patient.
• the l-[4-bromo-5-[l-ethyl-7-(methylamino)-2-oxo- l,2-dihydro-l,6-naphthyridin-3-yl]-2-fluorophenyl]-3-phenylurea, or the pharmaceutically acceptable salt thereof, and the MAPKAP kinase inhibitor is administered substantially concurrently or sequentially.
• the MEK inhibitor in this disclosed method can be selected from the group consisting of trametinib, selumetinib, cobimetinib, and binimetinib. In some embodiments, the MEK inhibitor is binimetinib. In some embodiments, the MEK inhibitor is trametinib. In some embodiments, the ERK inhibitor is selected from the group consisting of ulixertinib, SCH772984, and LY3214996.
• Administration for two weeks or more in accordance with such a disclosed method can result in the patient having partial reduction in tumor volume of at least 30%.
• the treatment results in a complete reduction in tumor volume.
• the disclosed method may further comprise determining if the tumor or tumor cells comprise a primary c-KIT gene mutation.
• the primary mutation is in exon 11 of the c-KIT gene.
• the primary mutation is in exon 9 of the c-KIT gene.
• the primary mutation is a deletion mutation.
• the primary mutation is V560D. In other embodiments, one or more additional secondary mutations c-KIT mutations are present.
• a method of treating a solid tumor in an imatinib resistant patient comprising: administering to the patient an effective amount of 1- [4-bromo-5-[l-ethyl-7-(methylamino)-2-oxo-l, 2-dihydro- 1, 6-naphthyridin-3-yl]-2- fluorophenyl]-3-phenylurea, or a pharmaceutically acceptable salt thereof; and administering to the patient an effective amount of a MAPKAP kinase inhibitor selected from the group consisting of trametinib, binimetinib, cobimetinib, and ulixertinib, wherein the solid tumor is selected from the group consisting of of lung adenocarcinoma, squamous cell lung cancer, glioblastoma, pediatric glioma, astrocytoma, sarcoma, gastrointestinal stromal tumor (GIST), and mela
• gastrointestinal stromal tumor or imatinib resistant melanoma in a patient in need thereof, comprising administering to the patient an effective amount of l-[4-bromo-5-[l-ethyl-7- (methylamino)-2-oxo-l, 2-dihydro- l,6-naphthyridin-3-yl]-2-fluorophenyl]-3-phenylurea, or a pharmaceutically acceptable salt thereof; and administering to the patient an effective amount of a MAPKAP kinase inhibitor selected from the group consisting of trametinib, binimetinib, cobimetinib, and ulixertinib.
• the method further comprises determining whether the tumor has a mutation of the c-KIT gene.
• the mutation is in exon 17 of the c-KIT gene.
• the c-KIT mutation is the substitution of aspartic acid in codon 816 or the substitution of asparagine in codon 822.
• the mutation is one of D816V, D816E, D816H, D820A, T670I, or N822V.
• a method of treating a solid tumor in a patient need thereof comprising administering to the patient an effective amount of l-[4-bromo-5-[l- ethyl-7-(methylamino)-2-oxo-l,2-dihydro-l,6-naphthyridin-3-yl]-2-fluorophenyl]-3- phenylurea, or a pharmaceutically acceptable salt thereof; and administering to the patient an effective amount of a RAF inhibitor.
• the solid tumor can be selected from the group consisting of lung adenocarcinoma, squamous cell lung cancer, GIST, and melanoma.
• the solid tumor has one or more mutations of the c-KIT gene.
• the RAF inhibitor can be a pan-RAF inhibitor.
• the RAF inhibitor is dabrafenib, vemurafenib, or LY3009120.
• a method of treating a solid tumor in a patient in need thereof comprising: administering to the patient an effective amount of l-[4- bromo-5-[l-ethyl-7-(methylamino)-2-oxo-l,2-dihydro-l,6-naphthyridin-3-yl]-2- fluorophenyl]-3-phenylurea, or a pharmaceutically acceptable salt thereof; and administering to the patient an effective amount of a MAPKAP kinase inhibitor selected from the group consisting of trametinib, binimetinib, cobimetinib, and ulixertinib, wherein the solid tumor is selected from the group consisting of of lung adenocarcinoma, squamous cell lung cancer, glioblastoma, pediatric glioma, astrocytoma, sarcoma, gastrointestinal stromal tumor (GIST), and
• Also provided herein is a method of treating a gastrointestinal stromal tumor or melanoma in a patient in need thereof, comprising administering to the patient an effective amount of 1- [4-bromo-5- [ l-ethyl-7-(methylamino)-2-oxo- 1 ,2-dihydro- 1 ,6-naphthyridin-3- yl]-2-fluorophenyl]-3-phenylurea, or a pharmaceutically acceptable salt thereof; and administering to the patient an effective amount of a MAPKAP kinase inhibitor selected from the group consisting of trametinib, binimetinib, cobimetinib, and ulixertinib.
• the method further comprises determining whether the tumor has a mutation of the c-KIT gene.
• the mutation is in exon 17 of the c-KIT gene.
• the c-KIT mutation is the substitution of aspartic acid in codon 816 or the substitution of asparagine in codon 822.
• the mutation is one of D816V, D816E, D816H, D820A, T670I, or N822V.
• the present disclosure provides methods of treating or preventing a tumor in a patient, optionally a c-KIT-mediated tumor, e.g., a GIST, comprising administering to a patient in need thereof an effective amount of Compound A, or a pharmaceutically acceptable salt thereof, in combination with an effective amount of a MEK inhibitor, e.g., trametinib.
• the present disclosure provides methods of treating or preventing a tumor in a patient, optionally a c-KIT-mediated tumor, e.g., a GIST, comprising administering to a patient in need thereof an effective amount of
• Compound B or a pharmaceutically acceptable salt thereof, in combination with an effective amount of a MEK inhibitor, e.g., trametinib.
• a MEK inhibitor e.g., trametinib.
• these methods include methods for: inducing prolonged stasis of tumor cells, e.g., GIST cells; killing of tumor cells, e.g., GIST cells; inducing apoptosis of tumor cells, e.g., GIST cells; inducing tumor cell eradication to the limit of detection, e.g., GIST cells; inducing tumor regression, e.g., GIST regression;
• these methods include methods for inducing prolonged stasis of tumor cells, e.g., GIST cells. In another specific embodiment, these methods include methods killing of tumor cells, e.g., GIST cells. In another specific embodiment, these methods include methods inducing apoptosis of tumor cells, e.g., GIST cells. In another specific embodiment, these methods include methods for inducing tumor cell eradication to the limit of detection, e.g., GIST cells. In another specific embodiment, these methods include methods for inducing tumor regression, e.g., GIST regression.
• these methods include methods for reducing tumor volume, e.g., GIST tumor volume. In another specific embodiment, these methods include methods for inhibiting tumor regrowth, e.g., GIST regrowth. In another specific embodiment, these methods include methods for inhibiting the growth of drug-resistant tumor cells, e.g., drug- resistant GIST cells. In certain embodiments, the methods encompass methods for eradicating a tumor to the limit of detection, e.g., a GIST, in a subject.
• tumor growth or tumor progression in the patient is caused by c-KIT overexpression, constitutive phosphorylation of c-KIT, increased c-KIT activity, oncogenic c-KIT missense mutations, oncogenic deletion c-KIT mutations, oncogenic nucleotide duplications/insertions, oncogenic c-KIT gene
• the tumor growth or tumor progression is caused by constitutive phosphorylation of c-KIT.
• the tumor comprises one or more of the primary activating c-KIT mutations and/or secondary c-KIT mutations disclosed herein.
• the tumor comprises one or more mutations in genes other then c -KIT that cause tumor growth by signaling through the MAPKAP pathway involving RAF, MEK, or ERK kinase activation.
• Compound A upon administration of Compound A in combination with a MEK inhibitor, ERK inhibitor, or a RAF inhibitor to a subject, some amount of the Compound A is metabolized in vivo to Compound B, and that an in vivo mixture of Compound A and Compound B may also be used to effectively treat a subject in combination with the MEK inhibitor, the ERK inhibitor or the RAF inhibitor.
• Illustrative MEK inhibitors that may be used according to the disclosed methods and compositions include, but are not limited to, trametinib, selumetinib, cobimetinib, and binimetinib.
• Illustrative ERK inhibitors that may be used according to the disclosed methods and compositions include, but are not limited to, ulixertinib, SCH772984,
• Illustrative RAF inhibitors that may be used according to the disclosed methods and compositions include, but are not limited to, LY3009120, dabrafenib, and vemurafenib.
• Compound A or a pharmaceutically acceptable salt thereof and a MEK inhibitor, e.g., trametinib are administered to a patient with a c-KIT- mediated tumor, e.g., a GIST.
• Compound B or a pharmaceutically acceptable salt thereof and a MEK inhibitor, e.g., trametinib are administered to a patient with a c-KIT-mediated tumor, e.g., a GIST.
• Compound A or a pharmaceutically acceptable salt thereof and a MEK inhibitor, e.g., trametinib, are administered to a patient with a tumor, e.g., a patient having a GIST, wherein tumor growth or tumor progression is caused by a primary activating c-KIT mutation and/or a secondary c-KIT mutation.
• a MEK inhibitor e.g., trametinib
• Compound B or a pharmaceutically acceptable salt thereof and a MEK inhibitor, e.g., trametinib, are administered to a patient with a tumor, e.g., a patient having a GIST, wherein tumor growth or tumor progression is caused by a primary activating c-KIT mutation and/or a secondary c-KIT mutation.
• the primary activating c-KIT mutation is an exon 11 mutation (e.g., a 57 base pair exon 11 deletion).
• the primary activating c-KIT mutation is an exon 9 A-Y 502-503 duplication.
• the primary activating c-KIT mutation is an exon 13 mutation.
• the primary activating c-KIT mutation is an exon 17 mutation.
• the secondary c-KIT mutation is any disclosed resistance mutation herein, e.g., a T670I mutation or a D816E mutation.
• multiple secondary c-KIT resistance mutations coexist in a subject.
• Compound A or a pharmaceutically acceptable salt thereof and a MEK inhibitor, e.g., trametinib are administered to a cancer patient.
• Compound B or a pharmaceutically acceptable salt thereof and a MEK inhibitor, e.g., trametinib are administered to a cancer patient.
• the tumor or cancer is lung adenocarcinoma, squamous cell lung cancer, glioblastoma, pediatric glioma, astrocytomas, sarcomas, melanoma, or gastrointestinal stromal tumors (GIST).
• the cancer is melanoma.
• the tumor or cancer is a gastrointestinal stromal tumor (GIST).
• GIST gastrointestinal stromal tumor
• the tumor or cancer is a c-KIT-mediated cancer, e.g., a c-KIT-mediated GIST or melanoma.
• Treatment with Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof, in combination with a MEK inhibitor, e.g., trametinib, encompasses administering Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof, before, after, simultaneous with, or during an overlapping time period with administering the MEK inhibitor. It is understood that an effective amount of any of Compound A or a
• an effective amount of Compound A or a pharmaceutically acceptable salt thereof, or of Compound B or a pharmaceutically acceptable salt thereof is a lower amount when administered as a combination therapy with a MEK inhibitor, e.g., trametinib, as compared to when it is administered as a monotherapy, e.g., to treat or prevent a GIST.
• an effective amount of a MEK inhibitor e.g., trametinib
• a MEK inhibitor e.g., trametinib
• a combination therapy with Compound A or a pharmaceutically acceptable salt thereof or when administered in a combination therapy with Compound B or a pharmaceutically acceptable salt thereof, e.g., to treat or prevent a GIST.
• any of the methods disclosed herein may further include determining that the tumor being treated has one or more c-KIT gene mutations. Such a determination may be made by routine methods for determining the presence of a gene mutation in a biological sample, e.g., a tumor sample, a blood sample, or a plasma sample obtained from the patient. In addition, such a determination may be made by reviewing the results of tests performed to determine the presence of one or more c-KIT gene mutations in a biological sample, e.g., a tumor sample, blood sample, or plasma sample obtained from the patient. In certain embodiments of any of the methods disclosed herein, the methods are performed on patients wherein the tumor has been identified as having one or more c-KIT gene mutations.
• the c- KP gene mutations include but are not limited to any of those specifically described herein.
• treatment with either Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof, in combination with a MEK inhibitor, e.g., trametinib induces prolonged cell stasis of tumor cells, e.g. GIST cells; induces killing of tumor cells, e.g., GIST cells; induces apoptosis of tumor cells, e.g., GIST cells; induces tumor cell eradication to the limit of detection, e.g., GIST cells; induces tumor regression, e.g.,
• GIST tumor reduces tumor weight or volume; e.g., GIST tumor; inhibits tumor regrowth, e.g., GIST tumor.
• GIST cells induces killing of tumor cells, e.g., GIST cells; induces apoptosis of tumor cells, e.g., GIST cells; induces tumor cell eradication to the limit of detection, e.g., GIST cells; induces tumor regression, e.g.,
• GIST tumor reduces tumor weight or volume; e.g., GIST tumor; inhibits tumor regrowth, e.g., GIST tumor in a drug resistant tumor, e.g. drug-resistant GIST.
• treatment with either Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof, in combination with a MEK inhibitor, e.g., trametinib eradicates a tumor to the limit of detection, in a patient being treated, e.g., a GIST patient.
• Methods for measuring or determining amounts of tumor cell stasis, tumor cell death, apoptosis of tumor cells, tumor regression, tumor weight or volume, tumor regrowth, growth of resistant tumor cells, and eradication of tumors are known in the art and include any methods described herein.
• treatment with a combination of: Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof; and a MEK inhibitor, e.g., trametinib results in an increased amount of tumor cell stasis, killing of tumor cells or apoptosis of tumor cells, e.g., GIST cells, as compared to the amount of stasis, cell killing or apoptosis of tumor cells of the same type or same tumor type either untreated or treated with only a MEK inhibitor, e.g., trametinib, or with only a c- KIT inhibitor, e.g., imatinib, or with a combination of a MEK inhibitor, e.g., trametinib, with the c-KIT inhibitor imatinib.
• a MEK inhibitor e.g., trametinib
• cell stasis, cell killing or apoptosis may be increased by at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least two-fold, at least three-fold, at least four-fold, at least five-fold, at least lO-fold, or at least 20-fold.
• amounts of apoptosis are determined by measuring caspase activity of tumor cells.
• treatment with a combination of: Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof; and a MEK inhibitor, e.g., trametinib results in increased tumor regression or decreased tumor size or volume (e.g., a GIST), as compared to the size, e.g., weight or volume of a tumor of the same type or the same tumor either untreated or treated with only a MEK inhibitor, e.g., trametinib, or with only a c-KIT inhibitor, e.g., imatinib.
• tumor weight or volume may be decreased by at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, or at least 90%.
• treatment with a combination of: Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof; and a MEK inhibitor, e.g., trametinib inhibits the amount of tumor growth or regrowth, e.g., GIST growth or regrowth, to a greater extent as compared to the amount of growth or regrowth the same type or the same tumor either untreated or treated with only a MEK inhibitor, e.g., trametinib, or with only a c-KIT inhibitor, e.g., imatinib.
• tumor growth or regrowth may be inhibited by at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, or at least 90%.
• treatment with a combination of: Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof; and a MEK inhibitor, e.g., trametinib inhibits the growth of resistant tumor cells, e.g., resistant GIST cells, to a greater extent as compared to the amount of growth of resistant tumor cells of the same type or the same tumor either untreated or treated with only a MEK inhibitor, e.g., trametinib, or with only a c-KIT inhibitor, e.g., imatinib, or with a combination of a MEK inhibitor, e.g., trametinib and a c-KIT inhibitor, e.g., imatinib.
• a MEK inhibitor e.g., trametinib
• a c-KIT inhibitor e.g., imatinib
• the amount of growth or number of resistant tumor cells may be inhibited by at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, or at least 90%.
• resistant tumor cells are resistant to treatment with a c- KIT inhibitor, e.g., imatinib, and/or a MEK inhibitor, e.g., trametinib.
• the resistant tumor cells comprise a c-KIT secondary mutation.
• the c-KIT secondary mutation is a mutation of any of the following amino acid residues of c-KIT: V654, N655, T670, L783, D816, D820, N822, Y823, A829, and/or T847, including but not limited to any of the amino acid substitutions depicted in the accompanying figures.
• the resistant tumor cells comprise an activated MAPKAP kinase pathway, and in certain embodiments, they comprise a mutation in a mutation in a RAS gene, e.g., an N-RAS or K-RAS gene, a Fibloblast Growth Factor Receptor (FGFR) gene, and/or a Neurofibromin-1 (NF1 ) gene.
• the mutation is an N- RAS G12D mutation.
• a MEK inhibitor e.g., trametinib
• eradication of a tumor means there is no longer any detectable tumor in the patient to the limit of detection.
• Tumor eradication may be determined by photon emission tomography (PET), CT scans, absence of circulating cell free DNA (cfDNA) containing a c-KIT mutation, absence of circulating tumor cells (CTCs) present in the vasculature of a subject, or absence of a cancer cell biomarker within the circulating blood vasculature of a subject.
• PET photon emission tomography
• CTCs circulating tumor cells
• treatment with either Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof, in combination with a ERK inhibitor, e.g., ulixertinib induces prolonged cell stasis of tumor cells, e.g. GIST cells; induces killing of tumor cells, e.g., GIST cells; induces apoptosis of tumor cells, e.g., GIST cells; induces tumor cell eradication to the limit of detection, e.g., GIST cells; induces tumor regression, e.g.,
• GIST tumor reduces tumor weight or volume; e.g., GIST tumor; inhibits tumor regrowth, e.g., GIST tumor.
• GIST cells induces killing of tumor cells, e.g., GIST cells; induces apoptosis of tumor cells, e.g., GIST cells; induces tumor cell eradication to the limit of detection, e.g., GIST cells; induces tumor regression, e.g.,
• GIST tumor reduces tumor weight or volume; e.g., GIST tumor; inhibits tumor regrowth, e.g., GIST tumor in a drug resistant tumor, e.g. drug-resistant GIST.
• a ERK inhibitor e.g., ulixertinib
• Methods for measuring or determining amounts of tumor cell stasis, tumor cell death, apoptosis of tumor cells, tumor regression, tumor weight or volume, tumor regrowth, growth of resistant tumor cells, and eradication of tumors are known in the art and include any methods described herein.
• treatment with a combination of: Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof; and a ERK inhibitor, e.g., ulixertinib results in an increased amount of tumor cell stasis, killing of tumor cells or apoptosis of tumor cells, e.g., GIST cells, as compared to the amount of stasis, cell killing or apoptosis of tumor cells of the same type or same tumor type either untreated or treated with only a ERK inhibitor, e.g., ulixertinib, or with only a c- KIT inhibitor, e.g., imatinib, or with a combination of a ERK inhibitor, e.g., ulixertinib, with the c-KIT inhibitor imatinib.
• a ERK inhibitor e.g., ulixertinib
• cell stasis, cell killing or apoptosis may be increased by at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least two-fold, at least three-fold, at least four-fold, at least five-fold, at least lO-fold, or at least 20-fold.
• amounts of apoptosis are determined by measuring caspase activity of tumor cells.
• treatment with a combination of: Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof; and a ERK inhibitor, e.g., ulixertinib results in increased tumor regression or decreased tumor size or volume (e.g., a GIST), as compared to the size, e.g., weight or volume of a tumor of the same type or the same tumor either untreated or treated with only a ERK inhibitor, e.g., ulixertinib, or with only a c-KIT inhibitor, e.g., imatinib.
• a ERK inhibitor e.g., ulixertinib
• tumor weight or volume may be decreased by at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, or at least 90%.
• treatment with a combination of: Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof; and a ERK inhibitor, e.g., ulixertinib inhibits the amount of tumor growth or regrowth, e.g., GIST growth or regrowth, to a greater extent as compared to the amount of growth or regrowth the same type or the same tumor either untreated or treated with only a ERK inhibitor, e.g., ulixertinib, or with only a c-KIT inhibitor, e.g., imatinib.
• tumor growth or regrowth may be inhibited by at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%,
• treatment with a combination of: Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof; and a ERK inhibitor, e.g., ulixertinib inhibits the growth of resistant tumor cells, e.g., resistant GIST cells, to a greater extent as compared to the amount of growth of resistant tumor cells of the same type or the same tumor either untreated or treated with only a ERK inhibitor, e.g., ulixertinib, or with only a c-KIT inhibitor, e.g., imatinib, or with a combination of a ERK inhibitor, e.g., ulixertinib and a c-KIT inhibitor, e.g., imatinib.
• a ERK inhibitor e.g., ulixertinib
• a c-KIT inhibitor e.g., imatinib
• the amount of growth or number of resistant tumor cells may be inhibited by at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, or at least 90%.
• resistant tumor cells are resistant to treatment with a c- KIT inhibitor, e.g., imatinib, and/or a ERK inhibitor, e.g., ulixertinib.
• a c- KIT inhibitor e.g., imatinib
• a ERK inhibitor e.g., ulixertinib.
• the resistant tumor cells comprise a c-KIT secondary mutation.
• the c-KIT secondary mutation is a mutation of any of the following amino acid residues of c-KIT: V654, N655, T670, L783, D816, D820, N822, Y823, A829, and/or T847, including but not limited to any of the amino acid substitutions depicted in the accompanying figures.
• the resistant tumor cells comprise an activated MAPKAP kinase pathway, and in certain embodiments, they comprise a mutation in a mutation in a RAS gene, e.g., an N-RAS or K-RAS gene, a Fibloblast Growth Factor Receptor (FGFR) gene, and/or a Neurofibromin-1 (NF1 ) gene.
• the mutation is an N- RAS G12D mutation.
• a ERK inhibitor e.g., ulixertinib
• eradication of a tumor means there is no longer any detectable tumor in the patient to the limit of detection.
• Tumor eradication may be determined by photon emission tomography (PET), CT scans, absence of circulating cell free DNA (cfDNA) containing a c-KIT mutation, absence of circulating tumor cells (CTCs) present in the vasculature of a subject, or absence of a cancer cell biomarker within the circulating blood vasculature of a subject.
• PET photon emission tomography
• CTCs circulating tumor cells
• treatment with either Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof, in combination with a RAF inhibitor, e.g., dabrafenib induces prolonged cell stasis of tumor cells, e.g. GIST cells; induces killing of tumor cells, e.g., GIST cells; induces apoptosis of tumor cells, e.g., GIST cells; induces tumor cell eradication to the limit of detection, e.g., GIST cells; induces tumor regression, e.g.,
• GIST tumor reduces tumor weight or volume; e.g., GIST tumor; inhibits tumor regrowth, e.g., GIST tumor.
• GIST cells induces killing of tumor cells, e.g., GIST cells; induces apoptosis of tumor cells, e.g., GIST cells; induces tumor cell eradication to the limit of detection, e.g., GIST cells; induces tumor regression, e.g.,
• GIST tumor reduces tumor weight or volume; e.g., GIST tumor; inhibits tumor regrowth, e.g., GIST tumor in a drug resistant tumor, e.g. drug-resistant GIST.
• RAF inhibitor e.g., dabrafenib
• Methods for measuring or determining amounts of tumor cell stasis, tumor cell death, apoptosis of tumor cells, tumor regression, tumor weight or volume, tumor regrowth, growth of resistant tumor cells, and eradication of tumors are known in the art and include any methods described herein.
• treatment with a combination of: Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof; and a RAF inhibitor, e.g., dabrafenib results in an increased amount of tumor cell stasis, killing of tumor cells or apoptosis of tumor cells, e.g., GIST cells, as compared to the amount of stasis, cell killing or apoptosis of tumor cells of the same type or same tumor type either untreated or treated with only a RAF inhibitor, e.g., dabrafenib, or with only a c- KIT inhibitor, e.g., imatinib, or with a combination of a RAF inhibitor, e.g., dabrafenib, with the c-KIT inhibitor imatinib.
• a RAF inhibitor e.g., dabrafenib
• cell stasis, cell killing or apoptosis may be increased by at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least two-fold, at least three-fold, at least four-fold, at least five-fold, at least lO-fold, or at least 20-fold.
• amounts of apoptosis are determined by measuring caspase activity of tumor cells.
• treatment with a combination of: Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof; and a RAF inhibitor, e.g., dabrafenib results in increased tumor regression or decreased tumor size or volume (e.g., a GIST), as compared to the size, e.g., weight or volume of a tumor of the same type or the same tumor either untreated or treated with only a RAF inhibitor, e.g., dabrafenib, or with only a c-KIT inhibitor, e.g., imatinib.
• tumor weight or volume may be decreased by at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, or at least 90%.
• treatment with a combination of: Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof; and a RAF inhibitor, e.g., dabrafenib inhibits the amount of tumor growth or regrowth, e.g., GIST growth or regrowth, to a greater extent as compared to the amount of growth or regrowth the same type or the same tumor either untreated or treated with only a RAF inhibitor, e.g., dabrafenib, or with only a c-KIT inhibitor, e.g., imatinib.
• tumor growth or regrowth may be inhibited by at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, or at least 90%.
• treatment with a combination of: Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof; and a RAF inhibitor, e.g., dabrafenib inhibits the growth of resistant tumor cells, e.g., resistant GIST cells, to a greater extent as compared to the amount of growth of resistant tumor cells of the same type or the same tumor either untreated or treated with only a RAF inhibitor, e.g., dabrafenib, or with only a c-KIT inhibitor, e.g., imatinib, or with a combination of a RAF inhibitor, e.g., dabrafenib and a c-KIT inhibitor, e.g., imatinib.
• a RAF inhibitor e.g., dabrafenib
• a c-KIT inhibitor e.g., imatinib
• the amount of growth or number of resistant tumor cells may be inhibited by at least 10%, at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, or at least 90%.
• resistant tumor cells are resistant to treatment with a c-KIT inhibitor, e.g., imatinib, and/or a RAF inhibitor, e.g., dabrafenib.
• the resistant tumor cells comprise a c-KIT secondary mutation.
• the c-KIT secondary mutation is a mutation of any of the following amino acid residues of c-KIT: V654, N655, T670, L783, D816, D820, N822, Y823, A829, and/or T847, including but not limited to any of the amino acid substitutions depicted in the accompanying figures.
• the resistant tumor cells comprise an activated MAPKAP kinase pathway, and in certain embodiments, they comprise a mutation in a mutation in a RAS gene, e.g., an N-RAS or K-RAS gene, a Fibloblast Growth Factor Receptor (FGFR) gene, and/or a Neurofibromin-1 (NF1 ) gene.
• the mutation is an N-RAS G12D mutation.
• a RAF inhibitor e.g., dabrafenib
• eradication of a tumor means there is no longer any detectable tumor in the patient to the limit of detection.
• Tumor eradication may be determined by photon emission tomography (PET), CT scans, absence of circulating cell free DNA (cfDNA) containing a c-KIT mutation, absence of circulating tumor cells (CTCs) present in the vasculature of a subject, or absence of a cancer cell biomarker within the circulating blood vasculature of a subject.
• PET photon emission tomography
• CTCs circulating tumor cells
• the present disclosure describes combination therapies that involve the administration of either Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof, and one or more MAPKAP kinase inhibitors, e.g. , a MEK inhibitor, ERK inhibitor, or RAF inhibitor.
• the combination therapies described herein can be used by themselves, or in further combination with one or more additional therapeutic agents (e.g., one or more additional therapeutic agents described below).
• additional therapeutic agents e.g., one or more additional therapeutic agents described below.
• Compound A or a pharmaceutically acceptable salt thereof, or Compound B or a pharmaceutically acceptable salt thereof, and a MEK inhibitor can be administered together with a cancer targeted therapeutic agent, a cancer-targeted biological, an immune checkpoint inhibitor, or a chemotherapeutic agent.
• Compound A or Compound B and a MEK inhibitor are administered without any other therapeutic agent.
• the therapeutic agents can be administered together with or sequentially with another therapeutic agent described herein in a combination therapy.
• Combination therapy can be achieved by administering two or more therapeutic agents, each of which is formulated and administered separately, or by administering two or more therapeutic agents in a single formulation. Other combinations are also encompassed by combination therapy. While the two or more agents in the combination therapy can be administered simultaneously, they need not be. For example, administration of a first agent (or combination of agents) can precede administration of a second agent (or combination of agents) by minutes, hours, days, or weeks. Thus, the two or more agents can be administered within minutes of each other or within 1, 2, 3, 6, 9, 12, 15, 18, or 24 hours of each other or within 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14 days of each other or within 2, 3, 4, 5,
• Combination therapy can also include two or more administrations of one or more of the agents used in the combination using different sequencing of the component agents. For example, if agent X and agent Y are used in a combination, one could administer them sequentially in any combination one or more times, e.g., in the order X-Y-X, X-X-Y, Y- X-Y, Y-Y-X, X-X-Y-Y, etc.
• the one or more additional therapeutic agents that may be administered according to the present disclosure include, but are not limited to, cytotoxic agents, cisplatin, doxorubicin, etoposide, irinotecan, topotecan, paclitaxel, docetaxel, the epothilones, tamoxifen, 5-fluorouracil, methotrexate, temozolomide, cyclophosphamide, lonafarib, tipifarnib, 4-((5-((4-(3-chlorophenyl)-3-oxopiperazin-l-yl)methyl)-lH-imidazol-l- yl)methyl)benzonitrile hydrochloride, (R)-l-((lH-imidazol-5-yl)methyl)-3-benzyl-4- (thiophen-2-ylsulfonyl)-2,3,4,5-tetrahydro-lH-benzo dia
• pipobroman triethylenemelamine, triethylenethiophosphoramine, busulfan, carmustine, lomustine, streptozocin, dacarbazine, floxuridine, cytarabine, 6-mercaptopurine, 6- thioguanine, fludarabine phosphate, leucovorin, oxaliplatin, pentostatine, vinblastine, vincristine, vindesine, bleomycin, dactinomycin, daunorubicin, epirubicin, idarubicin, mithramycin, deoxycoformycin, mitomycin-C, L-asparaginase, teniposide l7a-ethinyl estradiol, diethylstilbestrol, testosterone, prednisone, fluoxymesterone, dromostanolone propionate, testolactone, megestrol acetate, methylprednisolone, methyltestosterone, predni
• the one or more additional therapeutic agents that can be administered may include, without limitation, an AKT inhibitor, alkylating agent, all-trans retinoic acid, antiandrogen, azacitidine, BCL2 inhibitor, BCL-XL inhibitor, BCR-ABL inhibitor, BTK inhibitor, BTK/LCK/LYN inhibitor, CDK1/2/4/6/7/9 inhibitor, CDK4/6 inhibitor, CDK9 inhibitor, CBP/p300 inhibitor, EGFR inhibitor, endothelin receptor antagonist, RAF inhibitor, MEK inhibitor, ERK inhibitor, famesyltransferase inhibitor, FLT3 inhibitor, glucocorticoid receptor agonist, HDM2 inhibitor, histone deacetylase inhibitor, IKKb inhibitor,
• immunomodulatory drug ingenol
• ITK inhibitor JAK1/JAK2/JAK3/TYK2 inhibitor
• MTOR inhibitor PI3 kinase inhibitor
• dual PI3 kinase/MTOR inhibitor proteasome inhibitor
• protein kinase C agonist SUV39H1 inhibitor
• TRAIL TRAIL
• VEGFR2 inhibitor Wnt/ -catenin signaling inhibitor
• decitabine and anti-CD20 monoclonal antibody.
• the additional therapeutic agent is an
• immunomodulatory agent is selected from the group consisting of CTLA4 inhibitors such as, but not limited to ipilimumab and tremelimumab; PD1 inhibitors such as, but not limited to pembrolizumab, and nivolumab; PDL1 inhibitors such as, but not limited to atezolizumab (formerly MPDL3280A), durvalumab (formerly MEDI4736), avelumab, PDR001; 4 1BB or 4 1BB ligand inhibitors such as, but not limited to urelumab and PF-05082566; 0X40 ligand agonists such as, but not limited to MEDI6469; GITR agents such as, but not limited to TRX518; CD27 inhibitors such as, but not limited to varlilumab; TNFRSF25 or TL1A inhibitors; CD40 agonists such as, but not limited to CP-870893; HVEM or LIGHT or LTA or BT
• aspects of the present disclosure are directed to methods of treatment involving the administration of a combination of compounds disclosed herein, or one or more pharmaceutical compositions comprising such compounds and a pharmaceutically acceptable diluent, excipient or carrier.
• the methods disclosed herein involve administering a first pharmaceutical composition comprising either Compound A or a pharmaceutically acceptable salt thereof thereof and a pharmaceutically acceptable diluent, excipient or carrier, and a second pharmaceutical composition comprising a MEK inhibitor, e.g., trametinib, a ERK inhibitor, e.g. ulixertinib, a RAF inhibitor, e.g. LY3009120, or pharmaceutically acceptable salts thereof, and a pharmaceutically acceptable diluent, excipient or carrier.
• the methods disclosed herein involve administering a first pharmaceutical composition comprising Compound B or a
• the methods disclosed herein involve administering a pharmaceutical composition comprising Compound A or a pharmaceutically acceptable salt thereof, a MEK inhibitor, e.g., trametinib, and a pharmaceutically acceptable diluent, excipient or carrier.
• the methods disclosed herein involve administering a pharmaceutical composition
• a pharmaceutical composition comprising Compound B or a pharmaceutically acceptable salt thereof, a MEK inhibitor, e.g., trametinib, and a pharmaceutically acceptable diluent, excipient or carrier.
• a MEK inhibitor e.g., trametinib
• a pharmaceutically acceptable diluent, excipient or carrier e.g., trametinib
• a pharmaceutical composition comprising Compound A or a pharmaceutically acceptable salt thereof, a ERK inhibitor, e.g., ulixertinib, and a pharmaceutically acceptable diluent, excipient or carrier.
• the methods disclosed herein involve administering a pharmaceutical composition comprising Compound B or a pharmaceutically acceptable salt thereof, a ERK inhibitor, e.g., ulixertinib, and a pharmaceutically acceptable diluent, excipient or carrier.
• a pharmaceutical composition comprising Compound A or a pharmaceutically acceptable salt thereof, a RAF inhibitor, e.g., LY3009120, and a pharmaceutically acceptable diluent, excipient or carrier.
• the methods disclosed herein involve administering a pharmaceutical composition comprising Compound B or a pharmaceutically acceptable salt thereof, a RAF inhibitor, e.g., LY3001290, and a pharmaceutically acceptable diluent, excipient or carrier.
• pharmaceutically acceptable carriers can be either solid or liquid.
• Solid forms include powders, tablets, dispersible granules, capsules, cachets and suppositories.
• the powders and tablets may be comprised of from about 5 to about 95 percent active ingredient.
• Suitable solid carriers are known in the art, e.g., magnesium carbonate, magnesium stearate, talc, sugar or lactose. Tablets, powders, cachets and capsules can be used as solid dosage forms suitable for oral administration. Examples of pharmaceutically acceptable carriers and methods of manufacture for various compositions may be found in A. Gennaro (ed.), Remington's Pharmaceutical Sciences, l8th Edition, (1990), Mack Publishing Co., Easton, Pa, which is hereby incorporated by reference in its entirety.
• Liquid form preparations include solutions, suspensions and emulsions.
• solutions for example, water or water-propylene glycol solutions for parenteral injection or addition of sweeteners and opacifiers for oral solutions, suspensions and emulsions.
• Liquid form preparations may also include solutions for intranasal administration.
• Liquid, particularly injectable, compositions can, for example, be prepared by dissolution, dispersion, etc.
• the disclosed compound is dissolved in or mixed with a pharmaceutically acceptable solvent such as, for example, water, saline, aqueous dextrose, glycerol, ethanol, and the like, to thereby form an injectable isotonic solution or suspension.
• a pharmaceutically acceptable solvent such as, for example, water, saline, aqueous dextrose, glycerol, ethanol, and the like.
• Proteins such as albumin, chylomicron particles, or serum proteins can be used to solubilize the disclosed compounds.
• Parental injectable administration is generally used for subcutaneous, intramuscular or intravenous injections and infusions.
• Injectables can be prepared in conventional forms, either as liquid solutions or suspensions or solid forms suitable for dissolving in liquid prior to injection.
• Aerosol preparations suitable for inhalation may also be used. These preparations may include solutions and solids in powder form, which may be in combination with a pharmaceutically acceptable carrier, such as an inert compressed gas, e.g., nitrogen.
• a pharmaceutically acceptable carrier such as an inert compressed gas, e.g., nitrogen.
• liquid form preparations that are intended to be converted, shortly before use, to liquid form preparations for either oral or parenteral administration.
• liquid forms include solutions, suspensions and emulsions.
• the two therapeutics may be administered together or in a“dual-regimen” wherein the two therapeutics are dosed and administered separately.
• a MEK inhibitor e.g., trametinib
• the two therapeutics may be administered together or in a“dual-regimen” wherein the two therapeutics are dosed and administered separately.
• the Compound A or B (or pharmaceutically acceptable salts thereof) and the MEK inhibitor are dosed separately, the typical dosage of Compound A or Compound B (or
• pharmaceutically acceptable salts thereof) administered to the subject in need of the treatment is typically from about 5 mg per day to about 5000 mg per day and, in other embodiments, from about 50 mg per day to about 1000 mg per day.
• Other dosages may be from about 10 mmol up to about 250 mmol per day, from about 20 mmol to about 70 mmol per day or even from about 30 mmol to about 60 mmol per day.
• Effective dosage amounts of the disclosed compounds, when used for the indicated effects range from about 0.5 mg to about 5000 mg of the disclosed compound as needed to treat the condition.
• compositions for in vivo or in vitro use can contain about 0.5, 5, 20, 50, 75, 100, 150, 250, 500, 750, 1000, 1250, 2500, 3500, or 5000 mg of the disclosed compound, or, in a range of from one amount to another amount in the list of doses.
• a typical recommended daily dosage regimen for oral administration can range from about 1 mg/day to about 500 mg/day or 1 mg/day to 200 mg/day, in a single dose, or in two to four divided doses. In one embodiment, the typical daily dose regimen is 150 mg.
• the dosage of MEK inhibitors is consistent with previously disclosed dosages and/or dosages approved for use by the Food and Drug
• the dosage of MEK inhibitor is less than previously approved dosages, e.g., about 20%, about 50% or about 80% of an approved dosage.
• the dosage of trametinib is about .5 mg to 20 mg orally daily, e.g., about 1 mg daily or about 2 mg daily.
• the dosage of cobimetinib is about 10 mg to 200 mg daily, e.g., about 30 mg or about 60 mg daily.
• the dosage of binimetinib is about 10 mg to about 200 mg twice daily, e.g., about 25 mg or about 45 mg twice daily.
• the dosage of selumetinib is about 10 mg to 200 mg daily, e.g., about 30 mg or about 75 mg twice daily.
• Compounds of the present disclosure may be administered by any suitable route.
• the compounds can be administrated orally (e.g., dietary) in capsules, suspensions, tablets, pills, dragees, liquids, gels, syrups, slurries, and the like.
• compositions such as in a coating of hard gelatin or cyclodextran
• Boker, et ak "Controlled Release of Biological Active Agents", John Wiley and Sons, 1986, which is hereby incorporated by reference in its entirety.
• the compounds can be administered to the subject in conjunction with an acceptable pharmaceutical carrier as part of a pharmaceutical composition.
• the formulation of the pharmaceutical composition will vary according to the route of administration selected.
• Suitable pharmaceutical carriers may contain inert ingredients which do not interact with the compound.
• the carriers are biocompatible, i.e., non-toxic, non-inflammatory, non- immunogenic and devoid of other undesired reactions at the administration site.
• Illustrative pharmaceutical compositions are tablets and gelatin capsules comprising a compound described herein and a pharmaceutically acceptable carrier, such as a) a diluent, e.g., purified water, triglyceride oils, such as hydrogenated or partially hydrogenated vegetable oil, or mixtures thereof, com oil, olive oil, sunflower oil, safflower oil, fish oils, such as EPA or DHA, or their esters or triglycerides or mixtures thereof, omega- 3 fatty acids or derivatives thereof, lactose, dextrose, sucrose, mannitol, sorbitol, cellulose, sodium, saccharin, glucose and/or glycine; b) a lubricant, e.g., silica, talcum, stearic acid, its magnesium or calcium salt, sodium oleate, sodium stearate, magnesium stearate, sodium benzoate, sodium acetate, sodium chloride and/or polyethylene glycol; for example,
• the compounds described herein are intended for use in pharmaceutical compositions a skilled artisan will understand that they can be provided in substantially pure forms for example, at least 60% pure, at least 75% pure, at least 85% pure, and at least 98% pure (w/w).
• the pharmaceutical preparation may be in a unit dosage form. In such form, the preparation is subdivided into suitably sized unit doses containing appropriate quantities of compounds A or B, e.g., an effective amount to achieve the desired purpose as described herein.
• the combination therapy disclosed herein appeared to have a cytotoxic effect on tumor cells, as opposed to merely a cytostatic effect. Furthermore, the combination therapy disclosed herein appeared to eradicate GIST tumor cells to the limit of detection, with no tumor cell colony outgrowth after removal of combination therapy including drug-free recovery periods of up to 21 days. Characterization of this unexpected finding was undertaken in biochemical assays and cellular assays, including those described herein.
• Example 1 Combination treatment of Compound A with Trametinib induces apoptosis in GIST-T1, GIST-T1/D816E Imatinib-resistant cells and GIST-T1/T670I Imatinib resistant cells
• Assays were conducted in 96 well plates with 10,000 GIST-T1, GIST- T1/D816E or GIST-T1/T670I cells seeded per well. Cells were treated with vehicle control, Compound A, trametinib, or combinations thereof at varying concentrations, and the cells were allowed to grow for 24 and 48 hours in the presence of the drug treatments. Apoptosis was assessed by measuring Caspase 3/7 activity.
• Figure 1A and 1C are graphical representations showing the relative percentage of caspase activity (compared to vehicle control set at 100%) determined for various treatments of GIST-T1 cells.
• Combination treatments for 24 hours ( Figure 1A, B) and 48 hours ( Figure 1C, D) with Compound Aand trametinib showed strong synergy for inducing apoptosis in GIST-T1 cells.
• Figure 1E is a graphical representation showing caspase activity from various treatments of GIST-T1/D816E imatinib resistant cells.
• Figure 1F is a matrix synergy chart and combination index plot based on the combination index (Cl) method described by Chou and Talalay (1984) and the computer software of Chou and Martin (2005).
• CI ⁇ l indicates synergism
• CI>l indicates antagonism.
• Combination treatments for 24 hours with Compound A and trametinib showed strong synergy for inducing apoptosis of GIST-T1/ D816E imatinib resistant cells.
• Figure 1G is a graphical representation showing caspase activity from various treatments of GIST-T1/T670I imatinib resistant cells.
• Figure 1H is a matrix synergy chart and combination index plot based on the combination index (Cl) method described by Chou and Talalay (1984) and the computer software of Chou and Martin (2005).
• CI ⁇ l indicates synergism
• CI>l indicates antagonism.
• Combination treatments for 24 hours with Compound A and trametinib showed strong synergy for inducing apoptosis of GIST-T1/ T670I imatinib resistant cells.
• Example 2 Combination treatment of Compound B with Trametinib induces apoptosis in GIST-T1, GIST-T1/D816E Imatinib-resistant cells and GIST-T1/T670I Imatinib resistant cells
• Figure 2A is a graphical representations showing the relative percentage of caspase activity (compared to vehicle control set at 100%) determined for various treatments of GIST-T1 cells.
• Figure 2B is a matrix synergy charts and combination index plots as described in example 1 Combination treatments for 24 hours (Figure 2A, B) with Compound B and trametinib showed strong synergy for inducing apoptosis in GIST-T1 cells.
• Figure 2C is a graphical representation showing caspase activity from various treatments of GIST-T1/D816E imatinib resistant cells.
• Figure 2D is a matrix synergy chart and combination index plot. Combination treatments for 24 hours with Compound B and trametinib showed strong synergy for inducing apoptosis of GIST-T1/ D816E imatinib resistant cells.
• Figure 2E is a graphical representation showing caspase activity from various treatments of GIST-T1/T670I imatinib resistant cells.
• Figure 2F is a matrix synergy chart and combination index plot. Combination treatments for 24 hours with Compound B and trametinib showed strong synergy for inducing apoptosis of GIST-T1/ T670I imatinib resistant cells.
• Example 3 Combination treatment of Compound A with binimetinib induces apoptosis in GIST-T1 and GIST-T1/D816E Imatinib-resistant cells and GIST-T1/T670I Imatinib resistant cells
• Figure 3A is graphical representations showing the relative percentage of caspase activity (compared to vehicle control set at 100%) determined for various treatments of GIST-T1 cells.
• Figure 3B shows matrix synergy charts and combination index plots based on the combination index (Cl) method as described in example 1. Combination treatments for 24 hours ( Figure 3A, 3B) with Compound A and binimetinib showed strong synergy for inducing apoptosis in GIST-T1 cells.
• Figure 3C is a graphical representation showing caspase activity from various treatments of GIST-T1/D816E imatinib resistant cells.
• Figure 3D is a matrix synergy chart and combination index plot based on the combination index (Cl) as described in example 1. Combination treatments for 24 hours with Compound A and binimetinib showed strong synergy for inducing apoptosis of GIST-T1/ D816E imatinib resistant cells.
• Figure 3E is a graphical representation showing caspase activity from various treatments of GIST-T1/T670I imatinib resistant cells.
• Figure 3F is a matrix synergy chart and combination index plot. Combination treatments for 24 hours with Compound A and binimetinib showed strong synergy for inducing apoptosis of GIST-T1/ T670I imatinib resistant cells.
• Example 4 Combination treatment of Compound B with binimetinib induces apoptosis in GIST-T1, GIST-T1/D816E Imatinib-resistant cells and GIST-T1/T670I Imatinib resistant cells
• Figure 4A is a graphical representations showing the relative percentage of caspase activity (compared to vehicle control set at 100%) determined for various treatments of GIST-T1 cells.
• Figure 4B is a matrix synergy charts and combination index plots based on the combination index (Cl) method described by Chou and Talalay (1984). Combination treatments for 24 hours ( Figure 4A, B) with Compound B and binimetinib showed strong synergy for inducing apoptosis in GIST-T1 cells.
• Figure 4C is a graphical representation showing caspase activity from various treatments of GIST-T1/D816E imatinib resistant cells.
• Figure 4D is a matrix synergy chart and combination index plot. Combination treatments for 24 hours with Compound B and binimetinib showed strong synergy for inducing apoptosis of GIST-T1/ D816E imatinib resistant cells.
• Figure 4E is a graphical representation showing caspase activity from various treatments of GIST-T1/T670I imatinib resistant cells.
• Figure 4F is a matrix synergy chart and combination index plot. Combination treatments for 24 hours with Compound B and binimetinib showed strong synergy for inducing apoptosis of GIST-T1/ T670I imatinib resistant cells.
• Example 5 Combination treatment of Compound A with cobimetinib induces apoptosis in GIST-T1 Imatinib sensitive cells, GIST-T1/D816E Imatinib-resistant cells and GIST-T1/T670I Imatinib resistant cells
• Figure 5A is graphical representations showing the relative percentage of caspase activity (compared to vehicle control set at 100%) determined for various treatments of GIST-T1 cells.
• Figure 5B shows matrix synergy charts and combination index plots based on the combination index (Cl) method as described in example 1. Combination treatments for 24 hours ( Figure 5A, 5B) with Compound A and cobimetinib showed strong synergy for inducing apoptosis in GIST-T1 cells.
• Figure 5C is a graphical representation showing caspase activity from various treatments of GIST-T1/D816E imatinib resistant cells.
• Figure 5D is a matrix synergy chart and combination index plot based on the combination index (Cl) as described in example 1. Combination treatments for 24 hours with Compound A and cobimetinib showed strong synergy for inducing apoptosis of GIST-T1/ D816E imatinib resistant cells.
• Figure 5E is a graphical representation showing caspase activity from various treatments of GIST-T1/T670I imatinib resistant cells.
• Figure 5F is a matrix synergy chart and combination index plot based on the combination index (Cl) as described in example 1. Combination treatments for 24 hours with Compound A and cobimetinib showed strong synergy for inducing apoptosis of GIST-T1/ T670I imatinib resistant cells.
• Example 6 Combination treatment of Compound B with cobimetinib induces apoptosis in GIST-T1, GIST-T1/D816E Imatinib-resistant cells and GIST-T1/T670I Imatinib resistant cells
• Figure 6A is a graphical representations showing the relative percentage of caspase activity (compared to vehicle control set at 100%) determined for various treatments of GIST-T1 cells.
• Figure 6B is a matrix synergy charts and combination index plot.
• FIG. 6 A, 6B Combination treatments for 24 hours ( Figure 6 A, 6B) with Compound B and cobimetinib showed strong synergy for inducing apoptosis in GIST-T1 cells.
• Figure 6C is a graphical representation showing caspase activity from various treatments of GIST-T1/D816E imatinib resistant cells.
• Figure 6D is a matrix synergy chart and combination index plot. Combination treatments for 24 hours with Compound B and cobimetinib showed strong synergy for inducing apoptosis of GIST-T1/ D816E imatinib resistant cells.
• Figure 6E is a graphical representation showing caspase activity from various treatments of GIST-T1/T670I imatinib resistant cells.
• Figure 6F is a matrix synergy chart and combination index plot. Combination treatments for 24 hours with Compound B and cobimetinib showed strong synergy for inducing apoptosis of GIST-T1/ T670I imatinib resistant cells.
• Example 7 Combination treatment of Compound A with ulixertinib (BVD-523) induces apoptosis in GIST-T1, and GIST-T1/T670I Imatinib resistant cells
• Figure 7A is graphical representations showing the relative percentage of caspase activity (compared to vehicle control set at 100%) determined for various treatments of GIST-T1 cells.
• Figure 7B shows matrix synergy charts and combination index plots based on the combination index (Cl) method as described in example 1. Combination treatments for 24 hours ( Figure 7A, 7B) with Compound A and ulixertinib showed strong synergy for inducing apoptosis in GIST-T1 cells at higher concentrations.
• Figure 7C is a graphical representation showing caspase activity from various treatments of GIST-T1/T670I imatinib resistant cells.
• Figure 7D is a matrix synergy chart and combination index plot based on the combination index (Cl) as described in example 1. Combination treatments for 24 hours with Compound A and ulixertinib showed strong synergy for inducing apoptosis of GIST-T1/ T670I imatinib resistant cells.
• Example 8 Combination treatment of Compound B with ulixertinib (Bvd-523) induces apoptosis in GIST-T1, and GIST-T1/T670I Imatinib resistant cells
• Synergy charts and combination index plots for caspase activity can be used to show for synergy for Compound B and ulixertinib combination in inducing apoptosis in GIST-T1, GIST-T1 /D816E imatinib resistant cells and GIST-T1/T670I Imatinib resistant cells .
• Example 9 Combination treatment of Compound A with SCH772984 induces apoptosis in GIST-T1, GIST-T1/D816E Imatinib-resistant cells and GIST-T1/T670I Imatinib resistant cells
• Synergy charts and combination index plots for caspase activity can be used to show for synergy for Compound A and SCH772984 combination in inducing apoptosis in GIST-T1, GIST-T1 /D816E imatinib resistant cells and GIST-T1/T670I imatinib resistant cells.
• Example 10 Combination treatment of Compound B with SCH772984 induces apoptosis in GIST-T1, GIST-T1/D816E Imatinib-resistant cells and GIST-T1/T670I Imatinib resistant cells
• Synergy charts and combination index plots for caspase activity can be used to show for synergy for Compound B and SCH772984 combination in inducing apoptosis in GIST-T1, GIST-T1 /D816E imatinib resistant cells and GIST-T1/T670I imatinib resistant cells.
• Example 11 Combination treatment of Compound A with LY3009120 induces apoptosis in GIST-T1, GIST-T1/D816E Imatinib-resistant cells and GIST-T1/T670I Imatinib resistant cells
• Synergy charts and combination index plots for caspase activity can be used to show for synergy for Compound A and LY3009120 combination in inducing apoptosis in GIST-T1, GIST-T1 /D816E imatinib resistant cells and GIST-T1/T670I imatinib resistant cells.
• Example 12 Combination treatment of Compound B with LY3009120 induces apoptosis in GIST-T1, GIST-T1/D816E Imatinib-resistant cells and GIST-T1/T670I Imatinib resistant cells
• Synergy charts and combination index plots for caspase activity can be used to show for synergy for Compound B and LY3009120 combination in inducing apoptosis in GIST-T1, GIST-T1 /D816E imatinib resistant cells and GIST-T1/T670I Imatinib resistant cells.
• Example 13 Combination treatment of Compound A with dabrafenib induces apoptosis in GIST-T1, GIST-T1/D816E Imatinib-resistant cells and GIST-T1/T670I Imatinib resistant cells
• Synergy charts and combination index plots for caspase activity can be used to show for synergy for Compound A and dabrafenib combination in inducing apoptosis in GIST-T1, GIST-T1 /D816E imatinib resistant cells and GIST-T1/T670I Imatinib resistant cells.
• Example 14 Combination treatment of Compound B with dabrafenib induces apoptosis in GIST-T1, GIST-T1/D816E Imatinib-resistant cells and GIST-T1/T670I Imatinib resistant cells
• Synergy charts and combination index plots for caspase activity can be used to show for synergy for Compound B and dabrafenib combination in inducing apoptosis in GIST-T1, GIST-T1 /D816E imatinib resistant cells and GIST-T1/T670I Imatinib resistant cells.
• Example 15 Combination treatment prevents colony outgrowth in GIST-T1, GIST- T1/D816E and GIST-T1/T670I) imatinib resistant cells
• FIG. 8A shows images of representative culture plates and a graphical representation of the number of GIST-T1 colonies counted from various treatments.
• GIST Tl cells are sensitive to imatinib and Compound A as single agents. It is noted that each of imatinib and Compound A as single agents demonstrate approximately a similar reduction of GIST Tl colony outgrowth to 23-30% of vehicle control.
• Combination treatment for 2 weeks with 50nM Compound A and either 50nM or 100hM trametinib unexpectedly led to complete cell stasis or eradication of GIST Tl colony outgrowth to the limit of detection as visualized with 5X objective microscopy, with no detectable colonies after removal of combination therapy for 9 days (note arrows in Figure 8A).
• combination treatment for 2 weeks with 100 nM imatinib and either 50 nM or 100 nM trametinib did not lead to complete tumor cell stasis or eradication after removal of combination therapy for 9 days.
• Figure 8B shows images of representative culture plates and graphical representation of the number of GIST-T1/D816E colonies counted from various treatments.
• Figure 8C shows images of representative culture plates when Compound A concentration was further lowered to 25 nM, 50 nM, or 100 nM and evaluated in combination with 50 nM trametinib.
• Figure 8D shows images of representative culture plates and graphical representation of the number of GIST-T1 /T670I colonies counted from various treatments.
• each of imatinib (500 nM) and Compound A (250 nM or 500 nM) as single agents demonstrate approximately a similar reduction of GIST T1/T670I colony outgrowth to approximately 44-49% of vehicle control.
• Treatment for 2 weeks with either 250 nM or 500 nM Compound A in combination with either 50 nM or 100 nM trametinib led to complete cell stasis or eradication of GIST T1/T670I colony outgrowth to the limit of detection as visualized with 5X objective microscopy, with no detectable colonies after removal of combination therapy for 10 days (note arrows in Figure 8D).
• treatment for 2 weeks with 500 nM imatinib in combination with either 50 nM or 100 nM trametinib did not lead to complete tumor cell stasis or tumor cell eradication after removal of combination therapy for 9 days.
• Example 16 Combination treatment of Compound B with trametinib prevents colony outgrowth in GIST-T1, GIST-T1/D816E and GIST-T1/T670I imatinib resistant cells
• Figure 9A shows images of representative culture plates and a graphical representation of the number of GIST-T1 colonies counted from various treatments.
• GIST Tl cells were sensitive to Compound B as single agents and showed a 42-54% reduction of GIST Tl colony outgrowth compared to vehicle control.
• Combination treatment for 2 weeks with 50 or 100 nM of Compound B and either 50 nM or 100 nM trametinib led to significant cell stasis with little colony outgrowh, while combination treatment with 250 nM of
• Figure 9B shows images of representative culture plates and graphical representation of the number of GIST-T1/D816E colonies counted from various treatments.
• Compound B (50 nM, 100 nM or 250 nM) as a single agent demonstrate cytocidal efficacy of GIST T1/D816E with colony outgrowth of approximately 59-84% of vehicle control ( Figure 9B).
• Figure 9C shows images of representative culture plates and graphical representation of the number of GIST-T1/T670I colonies counted from various treatments. It is noted that Compound B (50 nM, 100 nM, 250 nM) as single agents demonstrate GIST T1/T670I colony outgrowth to approximately 75-78% of vehicle control.
• Example 17 Combination treatment of Compound A with binimetinib prevents colony outgrowth in GIST-T1, GIST-T1/D816E and GIST-T1/T670I imatinib resistant cells
• Compound A and binimetinib prevents colony outgrowth in 3 GIST cell lines as explained in example 15.
• Figure 10A shows images of representative culture plates and a graphical representation of the number of GIST-T1 colonies counted from various treatments. It is noted that each of imatinib and Compound A as single agents demonstrate approximately a similar reduction of GIST Tl colony outgrowth to 36-41% of vehicle control. Combination treatment for 2 weeks with 100 nM or 250 nM of Compound A and either 500 nM, 1 uM, 2 uM or 3 uM binimetinib was evaluated.
• FIG. 10B shows images of representative culture plates and graphical representation of the number of GIST-T1/D816E colonies counted from various treatments.
• Figure 10C shows images of representative culture plates and graphical representation of the number of GIST-T1/T670I) colonies counted from various treatments.
• imatinib 500 nM
• Compound A 100 nM or 250 nM
• Treatment for 2 weeks with 250 nM Compound A in combination with 1 uM, 2 uM or 3 uM binimetinib led to complete cell stasis or eradication of GIST T1/T670I colony outgrowth to the limit of detection as visualized with 5X objective microscopy, with no detectable colonies after removal of combination therapy for 10 days (note arrows in Figure 10C).
• Compound B and binimetinib prevents colony outgrowth in 3 GIST cell lines as explained in
• Figure 11A shows images of representative culture plates and a graphical representation of the number of GIST-T1 colonies counted from various treatments. It is noted that each concentration of Compound B as a single agent demonstrates approximately a similar reduction of GIST Tl colony outgrowth to 27-31% of vehicle control.
• Figure 11B shows images of representative culture plates and graphical representation of the number of GIST-T1/D816E colonies counted from various treatments.
• Figure 11C shows images of representative culture plates and graphical representation of the number of GIST-T1/T670I colonies counted from various treatments. It is noted that Compound B (100 nM or 250 nM) as single agent showed a reduction of GIST T1/T670I colony outgrowth to about 72-78% of vehicle control. Treatment for 2 weeks with either 100 nM or 250 nM of Compound B and 3 uM binimetinib unexpectedly led to complete cell stasis or eradication of GIST T1/T670I colony outgrowth to the limit of detection as visualized with 5X objective microscopy, with no detectable colonies after removal of combination therapy for 10 days (note arrows in Figure 11C).
• Example 19 Combination treatment of Compound A with cobimetinib prevents colony outgrowth in GIST-T1, GIST-T1/D816E and GIST-T1/T670I imatinib resistant cells
• Figure 12A shows images of representative culture plates and a graphical representation of the number of GIST-T1 colonies counted from various treatments. It is noted that each of imatinib and Compound A as single agents demonstrate approximately a similar reduction of GIST Tl colony outgrowth to 18-23% of vehicle control. Combination treatment for 2 weeks with 250 nM of Compound A and either 100 nM, 200 nM or 500 nM of cobimetinib led to complete cell stasis or eradication of GIST Tl colony outgrowth to the limit of detection as visualized with 5X objective microscopy, with no detectable colonies after removal of combination therapy for 10 days (note arrows in Figure 12A).
• combination treatment for 2 weeks with 500 nM imatinib and either 100 nM, 200 nM or 500 nM cobimetinib did not lead to complete tumor cell stasis or eradication after removal of combination therapy for 10 days.
• Figure 12B shows images of representative culture plates and graphical representation of the number of GIST-T1/D816E colonies counted from various treatments.
• Figure 12C shows images of representative culture plates and graphical representation of the number of GIST-T1/T670I colonies counted from various treatments.
• Treatment for 2 weeks with either 50 nM or 100 nM Compound A in combination with cobimetinib (200 nM or 500 nM) unexpectedly led to >99% inhibition of GIST T1/T670I colony outgrowth as visualized with 5X objective microscopy (note arrows in Figure 12C).
• the cell stasis was maintained even after extended period of 20 days after drug removal.
• treatment for 2 weeks with 500 nM imatinib in combination with up to 500 nM of cobimetinib did not lead to robust cell stasis or cell eradication after removal of combination therapy for 10 days.
• Example 20 Combination treatment of Compound B with cobimetinib prevents colony outgrowth in GIST-T1, GIST-T1/D816E and GIST-T1/T670I imatinib resistant cells
• FIG. 13A shows images of representative culture plates and a graphical representation of the number of GIST-T1 colonies counted from various treatments. It is noted that Compound B as a single agent demonstrate approximately a similar reduction of GIST Tl colony outgrowth to 42-54% of vehicle control.
• Combination treatment for 2 weeks with with 100 nM or 250 nM of Compound B and either 200 nM or 500 nM of cobimetinib maintained significant cell stasis or cell killing of GIST-T1 cells even after an extended long term recovery of 20 days.
• Figure 13B shows images of representative culture plates and graphical representation of the number of GIST-T1/D816E colonies counted from various treatments.
• Compound B (100 nM or 250 nM) as a single agent demonstrates a lack of cytocidal efficacy of GIST T1/D816E with colony outgrowth of approximately 58-84% of vehicle control ( Figure 13B).
• the cell stasis was significantly maintained even after extended period of 20 days at higher concentration of Compound B.
• Figure 13C shows images of representative culture plates and graphical representation of the number of GIST-T1/T670I colonies counted from various treatments. It is noted that Compound B (100 nM or 250 nM) as single showed a reduction of GIST T1/T670I colony outgrowth to about 75-78% of vehicle control. Treatment for 2 weeks with either 50 nM, 100 nM or 250 nM of Compound B and either 200 nM or 500 nM of cobimetinib led to complete cell stasis or eradication of GIST T1/T670I colony outgrowth to the limit of detection as visualized with 5X objective microscopy, with no detectable colonies after removal of combination therapy for 10 days (note arrows in Figure 13C). The cell stasis was maintained even after extended period of 20 days after drug removal.
• Example 21 Combination treatment of Compound A with ulixertinib prevents colony outgrowth in GIST-T1, GIST-T1/D816E and GIST-T1/T670I imatinib resistant cells [000238] Studies were performed which demonstrate that combination treatment with Compound A and ulixertinib prevents colony outgrowth in 3 GIST cell lines as explained in example 15.
• Figure 14A shows images of representative culture plates and a graphical representation of the number of GIST-T1 colonies counted from various treatments. It is noted that Compound A as single agents demonstrate approximately a similar reduction of GIST Tl colony outgrowth to 37-41% of vehicle control. Combination treatment for 2 weeks with 50 nM, 100 nM or 250 nM of Compound A and either 1 uM, 2 uM or 3 uM of ulixertinib led to significant decrease in GIST Tl colony outgrowth as visualized with 5X objective microscopy (note arrows in Figure 14A).
• Figure 14B shows images of representative culture plates and graphical representation of the number of GIST-T1/D816E colonies counted from various treatments.
• Figure 14C shows images of representative culture plates and graphical representation of the number of GIST-T1/T670I colonies counted from various treatments.
• Treatment for 2 weeks with either 100 nM or 250 nM Compound A in combination with ulixertinib (2 uM or 3 uM) unexpectedly led to complete cell stasis or eradication of GIST T1/T670I colony outgrowth to the limit of detection as visualized with 5X objective microscopy, with no detectable colonies after removal of combination therapy for 10 days (note arrows in Figure 14C).
• the cell stasis was maintained even after extended period of 20 days after drug removal.
• Example 22 Combination treatment of Compound B with ulixertinib prevents colony outgrowth in GIST-T1/D816E imatinib resistant cells
• Figure 15 shows images of representative culture plates and graphical representation of the number of GIST-T1/D816E colonies counted from various treatments.
• Compound B (50 nM, 100 nM or 250 nM) as a single agent demonstrated approximately a similar lack of cytocidal efficacy of GIST T1/D816E with colony outgrowth of approximately 52-95% of vehicle control ( Figure 15).
• Example 23 Combination treatment of Compound A and ERK inhibitor SCH772984 prevents colony outgrowth in GIST-T1/D816E imatinib resistant cells
• Example 15 The protocol outlined in Example 15 can be used to show synergy for Compound A and SCH772984 combination in preventing outgrowth of colonies in GIST- Tl, GIST-T1/T670I and GIST-T1 /D816E imatinib resistant cells.
• Example 24 Combination treatment of Compound B and ERK inhibitor SCH772984 prevents colony outgrowth in GIST-T1/D816E imatinib resistant cells
• Example 15 The protocol outlined in Example 15 can be used to show synergy for Compound B and SCH772984 combination in preventing outgrowth of colonies in GIST- Tl, GIST-T1/T670I and GIST-T1 /D816E imatinib resistant cells.
• Example 25 Combination treatment of Compound A and RAF inhibitor LY3009120 prevents colony outgrowth in GIST-T1/D816E imatinib resistant cells
• Example 15 The protocol outlined in Example 15 can be used to show synergy for Compound A and LY3009120 combination in preventing outgrowth of colonies in GIST- Tl, GIST-T1/T670I and GIST-T1 /D816E imatinib resistant cells.
• Example 26 Combination treatment of Compound B and RAF inhibitor LY3009120 prevents colony outgrowth in GIST-T1/D816E imatinib resistant cells
• Example 15 The protocol outlined in Example 15 can be used to show synergy for Compound B and LY3009120 combination in preventing outgrowth of colonies in GIST- Tl, GIST-T1/T670I and GIST-T1 /D816E imatinib resistant cells.
• Example 27 Combination treatment of Compound A and RAF inhibitor inhibitor dabrafenib prevents colony outgrowth in GIST-T1/D816E imatinib resistant cells
• Example 15 The protocol outlined in Example 15 can be used to show synergy for Compound A and dabrafenib combination in preventing outgrowth of colonies in GIST- Tl, GIST-T1/T670I and GIST-T1 /D816E imatinib resistant cells.
• Example 28 Combination treatment of Compound B and RAF inhibitor inhibitor dabrafenib prevents colony outgrowth in GIST-T1/D816E imatinib resistant cells
• Example 15 The protocol outlined in Example 15 can be used to show synergy for Compound B and dabrafanib combination in preventing outgrowth of colonies in GIST-T1, GIST-T1/T670I and GIST-T1 /D816E imatinib resistant cells.
• Example 29 Combination treatment induces apoptosis in N-ras G12D transfected GIST-T1 cells
• Figure 16A provides graphical representations of caspase activity measure after the various treatments. Combination treatment for 48 hours with 50 nM Compound A and trametinib (50 nM or 100 nM) induced an increased apoptosis in mutant N-ras G12D transfected GIST-T1 cells compared to cells treated with either single agent Compound A or trametinib.
• Example 30 Combination treatment prevents colony outgrowth in N-ras G12D transfected GIST-T1 cells
• Assays were conducted in 6 well plates with 100 cells seeded per well. Cells were treated with vehicle control, 50 nM Compound A, 50 nM or 100 nM trametinb, or combinations thereof, and the cells were cultured for 2 weeks. In the same experiment, cells were treated with vehicle control, 100 nM imatinib, 50 nM or 100 nM trametinib, or combinations thereof. After 2 weeks, the drug was washed out, and the cells were cultured in normal media for 1-3 weeks. The colonies were stained with crystal violet and counted.
• Figure 16B shows images of representative culture plates
• Figure 16C shows graphical representations of the number of vector control ( Figure 16B.1) and mutant N-ras G12D ( Figure 16B.2) transfected GIST-T1 colonies counted following various treatments. Quantitation of colony outgrowth in the vector control and N-ras G12D transfected GIST T-l cells is shown in Figure 16C.1 and Figure 16C.2, respectively.
• Combination treatment with 100 nM imatinib and 50 nM trametinib resulted in colony outgrowth (35% of vehicle control), and combination of 100 nM imatinib with 100 nM trametinib also resulted in colony outgrowth (19% of vehicle).
• combinations of Compound A with trametinib unexpectedly resulted in superior cell stasis or cell killing compared to combination with imatinib.
• Figure 16D shows images of representative culture plates of the number of mutant N-ras G12D transfected GIST-T1 colonies counted following an extended drug-free recovery period. Combination treatment for 2 weeks with 100 nM Compound A and 50 nM or 100 nM trametinib led to near complete blockade of colony outgrowth in N-ras G12D transfected GIST-T1 cells after an extended long term recovery period of 21 days.
• Example 32 Combination treatment prevent colony outgrowth in drug resistant GIST cells.
• a saturation mutagenesis study was performed in Ba/F3 cells transformed with oncogenic KIT V560D mutant. DNA nicking was induced by N-ethyl-N-nitrosourea (ENU) for 18 hours to generate additional mutations in the KIT gene or other genes in a random fashion. Assays were conducted in 6 well plates with 100 cells seeded per well.
• ENU N-ethyl-N-nitrosourea
• Figure 17A is a graphical representation demonstrating the growth of Ba/F3 colonies resistant to imatinib. T670I, K807E, and/or D816V imatinib-resistant secondary KIT mutants were identified by PCR and DNA sequencing of genomic DNA in Ba/F3 cells exposed to 100 nM, 250 nM, or 500 nM imatinib as a single agent ( Figure 17A, left panel).
• Figure 17A (right panel) is a graphical representation of the Ba/F3 cell saturation mutagenesis study with Compound A. Single agent treatment with 25 nM, 100 nM, or 250 nM Compound A did not lead to the outgrowth of any new secondary resistant mutation as determined by PCR and DNA sequencing.
• FIG. 17A is a graphical representation demonstrating the Ba/F3 cell colony outgrowth with imatinib in the presence of trametinib or Compound A in the presence of trametinib. Combination of imatinib at 250 nM or 500 nM with 10 nM trametinib did not lead to outgrowth of any new secondary resistant mutations but did lead to outgrowth of the original KIT V560D (parental) cells, likely reflecting mutation in genes other than KIT ( Figure 17B, left panel).
• Example 33 In vivo xenograft study of Compound A in combination with trametinib.
• the GIST Tl xenograft model was performed in compliance with all the laws, regulations and guidelines of the National Institutes of Health (NIH) and with the approval of the Animal Care and Use Committee of MI Bioresearch (Ann Arbor, MI), an AAALAC accredited facility. All mice had food and water ad libitum. All mice were observed for clinical signs at least once daily.
• mice Female Envigo nude mice (HsdCrhAthymic Nude-NU- Foxnlnu; 6-7 weeks old) were inoculated subcutaneously just below the right high axilla with five million cells in Dulbecco’s Phosphate Buffered Saline mixed with an equal volume of Matrigel, using a 27 gauge needle and syringe. When tumor burdens reached 117 mm 3 on average on day 10, mice were randomly assigned into groups such that the mean tumor burden for all groups was within 10% of the overall mean tumor burden for the study population.
• Figures 18A and 18B are graphical representation demonstrating inhibition of tumor growth compared to vehicle control.
• Figure 18B is the same data as Figure 18 A, but zoomed in to show differences among Compound A or Compound A/trametinib treated cohorts. Treatment with trametinib led to slight tumor growth inhibition compared to vehicle control.
• Compound A approximately 100 mg/kg/day
• 6/10 mice had complete tumor regression, with the remaining 4/10 mice having partial tumor regression during the dosing period.
• the low dose of Compound A approximately 25 mg/kg/day
• 2/10 mice had complete tumor regression, and 6/10 had partial tumor regression.
• Example 34 Compound A is a potent inhibitor of the BCRP efflux transporter.

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