WO2016204193A1 - 抗がん剤 - Google Patents
抗がん剤 Download PDFInfo
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- WO2016204193A1 WO2016204193A1 PCT/JP2016/067843 JP2016067843W WO2016204193A1 WO 2016204193 A1 WO2016204193 A1 WO 2016204193A1 JP 2016067843 W JP2016067843 W JP 2016067843W WO 2016204193 A1 WO2016204193 A1 WO 2016204193A1
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- catenin
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- 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
- A61K31/66—Phosphorus compounds
- A61K31/675—Phosphorus compounds having nitrogen as a ring hetero atom, e.g. pyridoxal phosphate
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- 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
- A61K31/4985—Pyrazines or piperazines ortho- or peri-condensed with heterocyclic ring systems
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- 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
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- 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
- A61K31/53—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with three nitrogens as the only ring hetero atoms, e.g. chlorazanil, melamine
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- 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
- A61K31/535—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines
- A61K31/5365—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines ortho- or peri-condensed with heterocyclic ring systems
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- A—HUMAN NECESSITIES
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K39/395—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K39/395—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum
- A61K39/39533—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals
- A61K39/3955—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals against proteinaceous materials, e.g. enzymes, hormones, lymphokines
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- 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
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- A—HUMAN NECESSITIES
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- A61P35/00—Antineoplastic agents
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
- C07K16/2803—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily
- C07K16/2818—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily against CD28 or CD152
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- 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
- the present invention relates to a method of treating cancer by combining a CBP / catenin inhibitor and an immune checkpoint inhibitor and a cancer therapeutic agent.
- PD-1 programmed death 1
- PD-L1 and PD-L2 binds to its ligands PD-L1 and PD-L2 expressed on antigen-presenting cells, and transmits inhibitory signals to cytotoxic T cells (CD8-positive T cells). It negatively regulates the activation state of cytotoxic T cells.
- Cancer cells forcibly expressing PD-L1 are known to attenuate the cytotoxic activity of antigen-specific CD8-positive T cells or induce apoptosis. Many cancer cells express PD-L1, and it is known that the higher the expression, the worse the prognosis.
- the anti-PD-1 antibody blocks the transmission of inhibitory signals, maintains the activated state of cytotoxic T cells, and attacks cancer cells.
- CTLA cytotoxic T lymphocyte associated antigen
- CD80 costimulatory molecule
- CD86 CD86
- Non-Patent Document 1 In addition, regarding PD-L1, in cancer stem cell research for biliary tract cancer, cells with decreased expression of PD-L1 are characteristic of various cancer stem cells (tumor-forming ability, quiescent phase, ALDH activity, etc.). ) Has been reported (Non-Patent Document 1). Many cancer stem cells are negative for HLA class I expression and are not recognized by cytotoxic T cells.
- Non-Patent Document 2 As a mechanism, as a result of inhibiting the binding of CBP and catenin, P300 having high similarity to CBP is bound instead of CBP.
- Non-patent Document 3 This change is thought to suppress cancer growth and induce differentiation.
- cholangiocarcinoma has been shown to be the primary route of tumor growth via the Wnt- ⁇ -catenin pathway, and the CBP / catenin inhibitor ICG-001 has a strong growth inhibitory effect in animal models.
- Non-Patent Document 4 Conventional Wnt inhibitors are toxic in preclinical and clinical trials due to mechanisms that block Wnt ligand production, block receptor function, promote catenin degradation, etc. Most of the developments were discontinued due to problems. This is because the Wnt pathway is thought to be essential for life support.
- CBP / catenin inhibitors are highly safe because they do not block signals but show effects by switching the switch from CBP to P300.
- ⁇ -catenin is also known to suppress T cell activation by suppressing T cell differentiation (Non-patent Document 5). Therefore, CBP / ⁇ -catenin inhibitors are believed to promote T cell differentiation and activate T cells.
- Anti-PD-1 antibody and anti-CTLA-4 antibody have limited patients who are clinically effective. The reason for this is that in cancer patients, the number of CD-8 positive cells and ⁇ -catenin expression are completely inversely correlated, and in tissues where ⁇ -catenin expression is high, there are few T cells and the expression is low. In tissue, it is shown that there are many T cells, and in a tissue with many T cells, it shows a remarkable effect (nonpatent literature 6).
- the present invention has found that an excellent therapeutic effect can be obtained by using a combination of an immune checkpoint inhibitor such as a PD-1-PD-L1 inhibitor and a CBP / catenin inhibitor.
- an immune checkpoint inhibitor such as a PD-1-PD-L1 inhibitor and a CBP / catenin inhibitor.
- the gist of the present invention is as follows. (1) A cancer therapeutic agent comprising a combination of a CBP / catenin inhibitor and an immune checkpoint inhibitor. (2) one or more types of immunity wherein the immune checkpoint inhibitor is selected from PD-1 antagonist, PD-L1 antagonist, PD-L2 antagonist, CTLA-4 antagonist, KIR antagonist, CD137 antagonist, LAG3 antagonist and OX40 antagonist.
- the immune checkpoint inhibitor is selected from anti-PD-1 antibody, anti-PD-L1 antibody, anti-PD-L2 antibody, anti-CTLA-4 antibody, anti-KIR antibody, anti-LAG3 antibody and anti-OX40 antibody 1
- the cancer therapeutic agent according to (1) above which is a species or more immune checkpoint inhibitor.
- the CBP / catenin inhibitor is an ⁇ -helix mimetic compound having CBP / catenin inhibitory activity.
- the ⁇ -helix mimetic compound is described in WO2003 / 031448, WO2004 / 093828, WO2005 / 116032, WO2009 / 148192, WO2010 / 044485, WO2010 / 128865, WO2012 / 115286, and / or WO2015 / 098853 -The cancer therapeutic agent according to (4) above, which is at least one compound selected from a helix mimetic compound.
- the immune checkpoint inhibitor is selected from PD-1 antagonist, PD-L1 antagonist, PD-L2 antagonist, CTLA-4 antagonist, KIR antagonist, CD137 antagonist, LAG3 antagonist and OX40 antagonist
- the immune checkpoint inhibitor is selected from anti-PD-1 antibody, anti-PD-L1 antibody, anti-PD-L2 antibody, anti-CTLA-4 antibody, anti-KIR antibody, anti-LAG3 antibody and anti-OX40 antibody 1
- CBP / ⁇ -catenin inhibitor is not a simple additive effect of cancer check effect of immune checkpoint inhibitor and cancer treatment effect of CBP / ⁇ -catenin inhibitor. It enhances cancer treatment effect by promoting oxidization and migration to cancer tissue, and suppresses cancer cell proliferation effect of CBP / ⁇ -catenin.
- CBP / ⁇ -catenin inhibitors promote the differentiation of cancer stem cells and increase their antigenicity.
- PD-L1 expression may suppress the action of cytotoxic T cells, but immune checkpoint inhibition
- the agent increases the cancer therapeutic effect of a CBP / ⁇ -catenin inhibitor by inhibiting the binding of PD-1 and PD-L1.
- FIG. 1 is a schematic diagram showing the mechanism of action of immune checkpoint inhibitors.
- FIG. 2 is a schematic diagram showing the mechanism of action of a CBP / ⁇ -catenin inhibitor.
- FIG. 3 shows that the CBP / ⁇ -catenin inhibitor eliminated breast cancer stem cells in Example 1.
- FIG. 4 is a graph showing that the CBP / ⁇ -catenin inhibitor suppressed the growth of colorectal cancer in Example 3.
- FIG. 5 shows that the CBP / ⁇ -catenin inhibitor reduced IL-10 in Example 4.
- the present invention provides a cancer therapeutic agent comprising a combination of a CBP / catenin inhibitor and an immune checkpoint inhibitor. Details will be described below.
- CBP / catenin inhibitor ⁇ -catenin acts as a mediator of Wnt signaling, binds to transcription factor Tcf / Lef (T cell factor / Lymphocyte enhancing factor), and various genes related to Wnt signaling (cyclin D1, c-Myc, etc.) ) And regulate cell proliferation and differentiation (He et al., 1998 Science 281 1509-1512: Kolligs et al., 1999 Mol. Cell. Biol. 19,5696-5706: Crawford et al.
- CBP cyclic AMP responsive element binding protein
- the CBP / catenin inhibitor is not particularly limited as long as it inhibits the interaction between CBP and catenin, particularly ⁇ -catenin, and inhibits the binding between ⁇ -catenin and CBP.
- An embodiment that suppresses gene expression by the complex is preferred.
- CBP / ⁇ -catenin inhibition can be measured by a binding assay known per se (such as a radiobinding assay), a reporter assay, or the like.
- the reporter assay described in WO2009 / 148192 can be used to inhibit Wnt signaling. It can be confirmed by measuring gene expression.
- the CBP / catenin inhibitor of the present invention is not particularly limited as long as it is defined above, but is preferably an ⁇ -helix mimetic compound having CBP / catenin inhibitory activity, for example, WO2003 / 031448, WO2004 / 093828, WO2005 / 116032, WO2009 / 148192, WO2010 / 044485, WO2010 / 128865, WO2012 / 115286, and the like, and pharmaceutically acceptable salts thereof. .
- Examples of the CBP / catenin inhibitor of the present invention include compounds having a Wnt Pathway modulating action described in WO2015 / 098853, pharmaceutically acceptable salts thereof, and the like.
- 6S, 9aS -N-benzyl-8-((6- (3- (4-ethylpiperazin-1-yl) azetidin-1-yl) pyridin-2-yl) methyl) -6- ( (2-Fluoro-4-hydroxyphenyl) methyl) -4,7-dioxo-2- (prop-2-en-1-yl) -octahydro-1H-pyrazino [2,1-c] [1,2, 4] Triazine-1-carboxamide (Compound A) and the like.
- the CBP / catenin inhibitor can be administered as a pharmaceutical preparation (eg, injection, capsule, tablet, powder, granule, etc.) formulated by a conventional method.
- a pharmaceutical preparation eg, injection, capsule, tablet, powder, granule, etc.
- a conventional method for example, in a dose of about 0.01 to 1000 mg / kg (body weight) per day, preferably about 0.1 to 500 mg / kg (body weight) per day, in terms of the amount of active ingredient,
- the administration may be divided into several times, but the dose, administration method, and number of administrations can be appropriately changed depending on symptoms, age and the like.
- carriers such as distilled water and physiological saline may be used.
- Excipients such as starch paste, gum arabic, gelatin, sodium alginate, carboxymethylcellulose, hydroxypropylcellulose and other binders, magnesium stearate, talc and other lubricants, starch, agar, crystalline cellulose, calcium carbonate Disintegrants such as sodium bicarbonate and sodium alginate may be used.
- the active ingredient content in the formulation can vary between 1 and 99% by weight.
- the active ingredient when taking the form of tablets, capsules, granules, powders, etc., it is preferable to contain 5 to 80% by weight of the active ingredient, and in the case of injections, it contains 1 to 10% by weight of the active ingredient. It is preferable to do so.
- immune checkpoint inhibitor examples include blocking agents for T cell inhibitory receptors.
- a blocking agent for a T cell inhibitory receptor is generally a molecule that specifically binds to the extracellular domain of a T cell inhibitory receptor or the extracellular domain of a T cell inhibitory receptor ligand. Blocking the binding of these ligands such as CD80, CD86, PD-L1, and PD-L2 prevents T cell inhibitory receptor activation.
- PD-1 antagonists such as anti-PD-1 antibodies such as nivolbumab and pembrolizumab
- PD-L1 antagonists such as anti-PD-L1 antibodies such as pilizizumab, MPDL-3280A, MEDI4736, MSB0010718C, and MEDI0680
- PD -L2 antagonist anti-PD-L2 antibody etc.
- CTLA-4 antagonist anti-CTLA-4 antibody such as ibilimumab, tremelimab etc.
- KIR antagonist anti-killer cell immunoglobulin-like receptor antibody (anti-KIR antibody) such as ririlumab)
- CD137 antagonist Ulerumab, anti-CD137 antibody such as PF-05082566), LAG3 antagonist (BMS-986016 etc.
- the immune checkpoint inhibitor can be made into a pharmaceutical composition by a conventional method.
- the pharmaceutical composition often comprises one or more buffers (eg, neutral buffered saline or phosphate buffered saline), carbohydrates (eg, glucose, mannose, sucrose, or dextran).
- Amino acids such as mannitol, protein, polypeptide, or glycine, antioxidants (eg, ascorbic acid, sodium disulfite, butylhydroxytoluene, butylhydroxyanisole, etc.), bacteriostatic agents, chelating agents such as EDTA or glutathione,
- antioxidants eg, ascorbic acid, sodium disulfite, butylhydroxytoluene, butylhydroxyanisole, etc.
- bacteriostatic agents eg., ascorbic acid, sodium disulfite, butylhydroxytoluene, butylhydroxyanisole, etc.
- chelating agents such as EDTA or glutathione
- solutes, suspensions, thickeners, preservatives, flavorings, sweeteners and / or coloring compounds that make the composition isotonic, hypotonic, or slightly hypertonic with the recipient's blood are optionally included.
- the present invention is a method for treating a patient suffering from cancer, comprising administering to the patient a cancer therapeutic agent comprising a combination of a CBP / catenin inhibitor and an immune checkpoint inhibitor.
- the methods described herein are directed to cancer treatments such as leukemias and solid tumors (eg, melanoma, cancer, sarcoma, lymphoma, etc.).
- the cancer therapeutic agent comprising the combination of the CBP / catenin inhibitor and immune checkpoint inhibitor of the present invention can be used separately or together, for example, oral, nasal, mucosal, rectal, intravaginal, topical, intravenous, It can be formulated in any manner suitable for any administration, including intraperitoneal, intradermal, subcutaneous, and intramuscular administration.
- an initial effective amount can be estimated from cell culture or other in vitro assays.
- Dosages can be formulated in animal models to produce circulating or tissue concentrations, such as IC50 concentrations determined by cell culture assays.
- the method of administration is selected depending on the condition being treated and the therapeutic agent.
- Administration of CBP / catenin inhibitor and immune checkpoint inhibitor can be done in a variety of ways, for example, but not limited to, subcutaneous, intravenous, intraperitoneal, intramuscular, and systemic administration is preferred Direct injection into specific organs or tumors.
- Administration of CBP / catenin inhibitor and immune checkpoint inhibitor may be through a single route or by several routes simultaneously.
- CBP / catenin inhibitors and immune checkpoint inhibitors may be administered once a day, twice to several times a day, or even multiple times a day, inter alia, depending on the therapeutic indication and the judgment of the prescribing physician.
- the amount of CBP / catenin inhibitor and immune checkpoint inhibitor necessary to obtain a therapeutic effect can be determined empirically according to conventional procedures for a particular purpose.
- the cells are given at a pharmacologically effective dose.
- a “pharmacologically effective amount” or “pharmacologically effective dose” refers to, for example, reducing or eliminating one or more symptoms or signs of a disorder or disease, particularly for treating a disorder or disease state.
- a cancer therapeutic agent comprising a combination of the CBP / catenin inhibitor and immune checkpoint inhibitor of the present invention may be used for other cancer treatments such as surgical excision, radiation therapy, chemotherapy, immunotherapy, and supportive therapy (for example, Analgesics, diuretics, antidiuretics, antiviral drugs, antibiotics, nutrients, anemia treatment, blood coagulation treatment, bone treatment, and psychopathological and psychological treatment).
- supportive therapy for example, Analgesics, diuretics, antidiuretics, antiviral drugs, antibiotics, nutrients, anemia treatment, blood coagulation treatment, bone treatment, and psychopathological and psychological treatment.
- Example 1 A side population of human breast cancer cell line (MDA-MB-231) with Hoechst Blue and Hoechst Red was sorted into a Side Population fraction (which is thought to be enriched for cancer stem cells) with 0.3 ⁇ M CBP / catenin.
- the Side Population fraction almost disappeared (1.6% SP cells were detected when the drug was untreated, but in the compound 2 treated group, 0% The cancer stem cells were considered to have differentiated (FIG. 3).
- Treatment example 1 In patients with unresectable malignant melanoma, nivolumab is administered intravenously at a dose of 2 mg / kg (body weight) once every 3 weeks and a CBP / ⁇ -catenin inhibitor (compound 1) is administered at 30 mg / m 2 / day. Intravenously infused.
- Treatment example 2 In patients with unresectable malignant melanoma, ipilimumab is administered intravenously at a dose of 3 mg / kg (body weight) once every 3 weeks, and a CBP / ⁇ -catenin inhibitor (compound 1) is administered at 100 mg / m 2 / day. Intravenously infused.
- Example 2 Transgenic mouse (MMTV-Wnt-1) combined effect of CBP / catenin inhibitor (compound A) and anti-mouse PD-1 (CD279) antibody in a model animal subcultured with spontaneous breast cancer Locally on mammary epithelial cells Spontaneous breast cancer of a transgenic mouse (MMTV-Wnt-1) expressing Wnt-1 was collected and transplanted to a background mouse (C57BL / 6J) with trocar. When the transplanted subcultured tumor reached about 1.5 g, it was excised, made into a fragment of about 30 mg, and implanted subcutaneously on the body side of each group of 5 mice (C57BL / 6J).
- Compound A 50 mg / kg, twice a day for 21 days, oral administration
- anti-mouse PD-1 antibody 10 mg / kg, 1 week
- the administration start date was 0 day, and on the following days 4, 7, 11, 14, 18, and 21, the major axis and the minor axis of the tumor generated in each mouse were measured with a Digimatic caliper (Mitsutoyo). Tumor volume was calculated according to the following formula.
- Tumor volume TV (mm 3 ) tumor major axis (mm) ⁇ tumor minor axis 2 (mm 2 ) / 2
- Table 1 The TV results are summarized in Table 1.
- the combined use of Compound A and anti-mouse PD-1 antibody showed an antitumor effect that was superior in statistical significance (* p ⁇ 0.05) compared to the case where each was administered alone (Repeated measures ANOVA). followed by Dunnett's type multiple comparison).
- Example 3 Combined effect of CBP / catenin inhibitor (compound 1) and anti-mouse PD-L1 antibody in model animals transplanted with colorectal cancer cells in BALB / C mice CT26 cells, which are colorectal cancer cells, were treated with female BALB / C mice The right abdomen was transplanted subcutaneously. After rearing until the average tumor size reached an average of 80 mm 3, the animals were divided into groups according to the following so that there were 10 cases per group.
- Group 1 Vehicle group
- Group 2 Anti-mouse PD-L1 antibody alone administration group 3: Compound 1 alone administration group 4: Compound 1 and anti-mouse PD-L1 antibody combination administration group Compound 1 (80 mg / kg, 1 day Once, 21 days, intraperitoneal administration) and anti-mouse PD-L1 antibody (catalog number: BE0101-100MG, BioXCell) (2 mg / kg, twice weekly, 2 weeks, intraperitoneal administration), either alone or in combination Administered.
- the administration start date was taken as day 0, and the major axis and the minor axis of the tumor generated in each mouse were measured on days 3, 6, 9, 12, and 15 below. Tumor volume was calculated according to the following formula.
- Tumor volume (mm 3 ) tumor major axis (mm) ⁇ tumor minor axis 2 (mm 2 ) / 2
- Tumor volume results are summarized in FIG.
- the combined use of Compound 1 and anti-mouse PD-L1 antibody showed an antitumor effect superior in statistical significance (* p ⁇ 0.01) compared to the case where each was administered alone (Repeated measurement Two -Way ANOVA).
- Example 4 IL-10 production inhibitory action of CBP / catenin inhibitor (Compound 1) 624mel cells and 928mel cells, which are cell lines (melanoma) established from human malignant melanoma patients in the US NIH, were used. These cells are activated and have the ability to produce IL-10. Each melanoma cell was seeded in a 6-well plate at a concentration of 1 ⁇ 10 5 cells / 2 ml / well in a culture solution (RPMI 1640 containing 10% FCS, penicillin and streptomycin added). After sowing, Compound 1 was added to a predetermined concentration and cultured for 24 hours. After 24 hours, the culture supernatant was collected, and the concentration of IL-10 in the supernatant was measured.
- CBP / catenin inhibitor Compound 1 624mel cells and 928mel cells, which are cell lines (melanoma) established from human malignant melanoma patients in the US NIH, were used. These cells are activated and have the ability
- Human IL10 OptEIA ELISA set (BD, # 555157) was used for the measurement of IL-10 concentration. The results are shown in FIG. When Compound 1 was added at 1 ⁇ M, the effect on proliferation was confirmed in any cell, but when Compound 1 was added at 0.2 ⁇ M, the effect on proliferation was not confirmed in any cell. Since IL-10 production was suppressed even under conditions that did not affect proliferation (0.2 ⁇ M), it was found that Compound 1 had an IL-10 production inhibitory effect. The number of patients who are clinically effective against anti-PD-1 and anti-CTLA-4 antibodies, which are immune checkpoint inhibitors, is limited, and the effect depends on the number of CD-8 positive T cells in cancer patients It is known.
- CBP / catenin inhibitors are highly effective in tissues with high expression of ⁇ -catenin, while their IL-10 production inhibitory action can increase the number of CD-8 positive T cells. Therefore, it was found that a CBP / catenin inhibitor can have a higher anticancer effect when used in combination with an immune checkpoint inhibitor.
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Abstract
Description
PD-1(programmed death 1)は、抗原提示細胞に発現するそのリガンドであるPD-L1およびPD-L2と結合し、細胞障害性T細胞(CD8陽性T細胞)に抑制性シグナルを伝達して細胞障害性T細胞の活性化状態を負に調節している。PD-L1を強制発現させたがん細胞は、抗原特異的CD8陽性T細胞の細胞傷害活性を減弱させたり、アポトーシスを誘導したりすることが知られている。多くのがん細胞では、PD-L1が発現しており、高発現であるほどその予後が悪いことが知られている。抗PD-1抗体、ニボルブマブは、抑制性シグナルの伝達を遮断し、細胞障害性T細胞の活性化状態を維持し、がん細胞を攻撃する。
また、CTLA (cytotoxic T lymphocyte associated antigen)-4と抗原提示細胞にある共刺激分子CD80(B7-1)またはCD86(B7-2)が結合すると、抗原提示細胞によって細胞障害性T細胞の活性化が抑制される。抗CTLA-4抗体、イピリムマブはこの結合を阻害することで細胞障害性T細胞を活性化し増殖させる(図1参照)。
また、PD-L1については、胆道がんのがん幹細胞の研究において、PD-L1の発現が低下している細胞が、様々ながん幹細胞の特徴(造腫瘍能・静止期・ALDH活性等)を備えていることが報告されている(非特許文献1)。がん幹細胞の多くは、HLAクラスIの発現が陰性であり、細胞傷害性T細胞に認識されない。
本発明者らが、抗がん剤として臨床開発中のCBP/カテニン阻害剤であるPRI-724は、ヒトにおいて従来の他のメカニズムのWnt阻害剤に比べ、明らかに低毒性であることを示した(非特許文献2)。このメカニズムとして、CBPとカテニンの結合を阻害した結果、CBPの代わりにCBPと類似性の高いP300が結合するようになる。この変化により、がんの増殖を抑え、分化を誘導すると考えられる(非特許文献3)。
最近、胆管がんは、Wnt-β-カテニン経路により腫瘍が増殖することが主たる経路であることが示され、CBP/カテニン阻害剤であるICG-001が動物モデルにおいて強い増殖阻害効果を有することが示された(非特許文献4)。
従来のWnt阻害剤は、Wntリガンドの産生を阻害し,受容体の機能をブロックし,カテニンの分解を促進する、などのメカニズムでシグナルを遮断するメカニズムのため、前臨床試験や臨床試験において毒性面の問題が生じ、開発が中止されたものがほとんどであった。これは、Wnt経路が生命維持に必須のためと考えられているからである。一方、CBP/カテニン阻害剤は、シグナルを遮断するのではなく、CBPからP300にスイッチを入れ替えることにより効果を示していることから安全性が高いと推測することができる。
さらに、β-カテニンは、T細胞分化を抑制することによりT細胞の活性化を抑制することも知られている(非特許文献5)。従って、CBP/β-カテニン阻害剤は、T細胞の分化を促進し、T細胞を活性化すると考えられる。
抗PD-1抗体や抗CTLA-4抗体は、臨床で著効を示す患者は限定的である。その理由として、がん患者において、CD-8陽性細胞数とβ-カテニンの発現が完全に逆に相関しておりβ-カテニンの発現が高い組織では、T細胞が少なく、逆に発現が低い組織では、T細胞が多いことが示され、T細胞が多い組織では著効を示す(非特許文献6)。
すなわち、本発明の要旨は以下のとおりである。
(1)CBP/カテニン阻害剤および免疫チェックポイント阻害剤を組み合わせてなるがん治療薬。
(2)免疫チェックポイント阻害剤が、PD-1アンタゴニスト、PD-L1アンタゴニスト、PD-L2アンタゴニスト、CTLA-4アンタゴニスト、KIRアンタゴニスト、CD137アンタゴニスト、LAG3アンタゴニストおよびOX40アンタゴニストから選択される1種以上の免疫チェックポイント阻害剤である上記(1)記載のがん治療薬。
(3)免疫チェックポイント阻害剤が、抗PD-1抗体、抗PD-L1抗体、抗PD-L2抗体、抗CTLA-4抗体、抗KIR抗体、抗LAG3抗体および抗OX40抗体から選択される1種以上の免疫チェックポイント阻害剤である上記(1)記載のがん治療薬。
(4)CBP/カテニン阻害剤が、CBP/カテニン阻害活性をもつα-へリックス模倣化合物である上記(1)~(3)記載のがん治療薬。
(5)前記α-へリックス模倣化合物がWO2003/031448、WO2004/093828、WO2005/116032、WO2009/148192、WO2010/044485、WO2010/128685、WO2012/115286、及び/又はWO2015/098853に記載されるα-へリックス模倣化合物のいずれか1種以上の化合物である上記(4)記載のがん治療薬。
(6)CBP/カテニン阻害剤が下記化合物から選ばれる1種以上である上記(1)~(4)記載のがん治療薬。
(6S,9aS)-N-ベンジル-6-[(4-ヒドロキシフェニル)メチル]-8-(ナフタレン-1-イルメチル)-4,7-ジオキソ-3,6,9,9a-テトラヒドロ-2H-ピラジノ[1,2-a]ピリミジン-1-カルボキサミド(ICG-001)、4-(((6S,9S,9aS)-1-(ベンジルカルバモイル)-2,9-ジメチル-4,7-ジオキソ-8-(キノリン-8-イルメチル)オクタヒドロ-1H-ピラジノ[2,1-c][1,2,4]トリアジン-6-イル)メチル)フェニル ジハイドロゲンホスフェート、(6S,9S,9aS)-N-ベンジル-6-(4-ヒドロキシベンジル)-2,9-ジメチル-4,7-ジオキソ-8-(キノリン-8-イルメチル)オクタヒドロ-1H-ピラジノ[2,1-c][1,2,4]トリアジン-1-カルボキサミド、及び(6S,9aS)-N-ベンジル-8-((6-(3-(4-エチルピペラジン-1-イル)アゼチジン-1-イル)ピリジン-2-イル)メチル)-6-((2-フルオロ-4-ヒドロキシフェニル)メチル)-4,7-ジオキソ-2-(プロプ-2-エン-1-イル)-オクタヒドロ-1H-ピラジノ[2,1-c][1,2,4]トリアジン-1-カルボキサミド
(7)有効量のCBP/カテニン阻害剤および有効量の免疫チェックポイント阻害剤をそれを必要とする対象に投与することを含む、がんの治療方法。
(8)免疫チェックポイント阻害剤が、PD-1アンタゴニスト、PD-L1アンタゴニスト、PD-L2アンタゴニスト、CTLA-4アンタゴニスト、KIRアンタゴニスト、CD137アンタゴニスト、LAG3アンタゴニストおよびOX40アンタゴニストから選択される1種以上の免疫チェックポイント阻害剤である上記(7)記載の方法。
(9)免疫チェックポイント阻害剤が、抗PD-1抗体、抗PD-L1抗体、抗PD-L2抗体、抗CTLA-4抗体、抗KIR抗体、抗LAG3抗体および抗OX40抗体から選択される1種以上の免疫チェックポイント阻害剤である上記(7)記載の方法。
(10)CBP/カテニン阻害剤が、CBP/カテニン阻害活性をもつα-へリックス模倣化合物である上記(7)~(9)記載の方法。
(11)前記α-へリックス模倣化合物がWO2003/031448、WO2004/093828、WO2005/116032、WO2009/148192、WO2010/044485、WO2010/128685、WO2012/115286、及び/又はWO2015/098853に記載されるα-へリックス模倣化合物のいずれか1種以上の化合物である上記(10)記載の方法。
(12)CBP/カテニン阻害剤が下記化合物から選ばれる1種以上である上記(7)~(10)記載の方法。
(6S,9aS)-N-ベンジル-6-[(4-ヒドロキシフェニル)メチル]-8-(ナフタレン-1-イルメチル)-4,7-ジオキソ-3,6,9,9a-テトラヒドロ-2H-ピラジノ[1,2-a]ピリミジン-1-カルボキサミド(ICG-001)、4-(((6S,9S,9aS)-1-(ベンジルカルバモイル)-2,9-ジメチル-4,7-ジオキソ-8-(キノリン-8-イルメチル)オクタヒドロ-1H-ピラジノ[2,1-c][1,2,4]トリアジン-6-イル)メチル)フェニル ジハイドロゲンホスフェート、(6S,9S,9aS)-N-ベンジル-6-(4-ヒドロキシベンジル)-2,9-ジメチル-4,7-ジオキソ-8-(キノリン-8-イルメチル)オクタヒドロ-1H-ピラジノ[2,1-c][1,2,4]トリアジン-1-カルボキサミド、及び(6S,9aS)-N-ベンジル-8-((6-(3-(4-エチルピペラジン-1-イル)アゼチジン-1-イル)ピリジン-2-イル)メチル)-6-((2-フルオロ-4-ヒドロキシフェニル)メチル)-4,7-ジオキソ-2-(プロプ-2-エン-1-イル)-オクタヒドロ-1H-ピラジノ[2,1-c][1,2,4]トリアジン-1-カルボキサミド
(CBP/カテニン阻害剤)
β-カテニンは、Wntシグナル伝達のメディエーターとして働き、転写因子であるTcf/Lef(T cell factor/Lymphocyte enhancing factor)と結合し、Wntシグナル伝達に関係する様々な遺伝子(cyclin D1やc-Myc等)の発現を促進し、細胞の増殖や分化を制御する(He et al.,1998 Science 281 1509-1512: Kolligs et al.,1999 Mol.Cell.Biol.19,5696-5706: Crawford et al.,1999,Oncogene 18,2883-2891: Shtutman et al.,1999,Proc.Natl.Acad.Sci.USA.,11,5522-5527: Tetsu and McCormick,1999 Nature,398,422-426)(図2参照)。
CBP(サイクリックAMP反応性エレメント結合タンパク質(CREB)結合タンパク質)は、CREB結合ドメインにおいてβ-カテニンと直接相互作用し、Tcf/Lefの転写活性化を促進する(Ken-Ichi Takemaru and Randall T.Moon,2000 J.Cell.Biol.,149,2,249-254)。
CBP/カテニン阻害剤とは、CBPとカテニン、特にβ-カテニンとの相互作用を阻害するものであれば特に限定されず、β-カテニンとCBPとの結合を阻害し、その結果、β-カテニン複合体による遺伝子発現を抑制する態様が好ましい。
CBP/β-カテニン阻害は、自体公知のバインディングアッセイ(ラジオバインディングアッセイ等)、レポーターアッセイ法等によって測定することができるが、好ましくは、WO2009/148192に記載のレポーターアッセイ法により、Wntシグナル伝達の遺伝子発現を測定することにより確認することができる。
本発明のCBP/カテニン阻害剤は、上記に定義されるものである限り特に限定されるものではないが、好ましくは、CBP/カテニン阻害活性をもつα-へリックス模倣化合物であり、例えば、WO2003/031448、WO2004/093828、WO2005/116032、WO2009/148192、WO2010/044485、WO2010/128685、WO2012/115286等に記載されるα-へリックス模倣化合物、その医薬的に許容される塩などが挙げられる。
好ましくは、(6S,9aS)-N-ベンジル-6-[(4-ヒドロキシフェニル)メチル]-8-(ナフタレン-1-イルメチル)-4,7-ジオキソ-3,6,9,9a-テトラヒドロ-2H-ピラジノ[1,2-a]ピリミジン-1-カルボキサミド(ICG-001)、4-(((6S,9S,9aS)-1-(ベンジルカルバモイル)-2,9-ジメチル-4,7-ジオキソ-8-(キノリン-8-イルメチル)オクタヒドロ-1H-ピラジノ[2,1-c][1,2,4]トリアジン-6-イル)メチル)フェニル ジハイドロゲンホスフェート(化合物1)、及び(6S,9S,9aS)-N-ベンジル-6-(4-ヒドロキシベンジル)-2,9-ジメチル-4,7-ジオキソ-8-(キノリン-8-イルメチル)オクタヒドロ-1H-ピラジノ[2,1-c][1,2,4]トリアジン-1-カルボキサミド(化合物2)等が挙げられる。
好ましくは、(6S,9aS)-N-ベンジル-8-((6-(3-(4-エチルピペラジン-1-イル)アゼチジン-1-イル)ピリジン-2-イル)メチル)-6-((2-フルオロ-4-ヒドロキシフェニル)メチル)-4,7-ジオキソ-2-(プロプ-2-エン-1-イル)-オクタヒドロ-1H-ピラジノ[2,1-c][1,2,4]トリアジン-1-カルボキサミド(化合物A)等が挙げられる。
免疫チェックポイント阻害剤は、例えば、T細胞抑制受容体に対する遮断剤があげられる。T細胞抑制受容体に対する遮断剤は、一般に、特異的にT細胞抑制受容体の細胞外ドメイン又はT細胞抑制受容体リガンドの細胞外ドメインに結合する分子であり、例えば、T細胞抑制受容体の、CD80、CD86、PD-L1、PD-L2などのそれらのリガンドとの結合を遮断することによりT細胞抑制受容体の活性化を妨げる。具体的には、PD-1アンタゴニスト(ニボルブマブ、ペムブロリズマブ等の抗PD-1抗体等)、PD-L1アンタゴニスト(ピジリズマブ、MPDL-3280A、MEDI4736、MSB0010718C、MEDI0680等の抗PD-L1抗体等)、PD-L2アンタゴニスト(抗PD-L2抗体等)、CTLA-4アンタゴニスト(イビリムマブ、トレメリマブ等の抗CTLA-4抗体等)、KIRアンタゴニスト(リリルマブ等の抗キラー細胞免疫グロブリン様受容体抗体(抗KIR抗体)等)、CD137アンタゴニスト(ウレルマブ、PF-05082566等の抗CD137抗体等)、LAG3アンタゴニスト(BMS-986016等の抗リンパ球活性化因子3抗体(抗LAG3抗体)等)およびOX40アンタゴニスト(MEDI6469等の抗OX40抗体)が挙げられる。抗PD-1抗体、抗PD-L1抗体、抗CTLA-4抗体が好ましい。
免疫チェックポイント阻害剤は常法により医薬組成物とすることができる。該医薬組成物は、多くの場合、1つ以上の緩衝液(例えば、中性の緩衝化された生理食塩水又はリン酸緩衝食塩水)、糖質(例えば、グルコース、マンノース、スクロース、又はデキストラン)、マンニトール、タンパク質、ポリペプチド、又はグリシンなどのアミノ酸、酸化防止剤(例えば、アスコルビン酸、二亜硫酸ナトリウム、ブチルヒドロキシトルエン、ブチルヒドロキシアニソールなど)、静菌剤、EDTA又はグルタチオンなどのキレート剤、組成物をレシピエントの血液と等張、低張、又はわずかに高張にする溶質、懸濁剤、増粘剤、防腐剤、香料、甘味料及び/又は着色化合物を必要に応じて更に含む。
本発明はCBP/カテニン阻害剤および免疫チェックポイント阻害剤を組み合わせてなるがん治療薬を患者へ投与することを含むがんを患う患者を治療する方法である。本明細書において記載されている方法は、がん治療、例えば白血病及び固形腫瘍(例えば黒色腫、がん、肉腫、リンパ腫など)を対象とする。具体的には腎臓がん、腎細胞がん、膀胱がん、尿路上皮がん、泌尿生殖器腫瘍、肺がん、肺扁平上皮がん、小細胞性肺がん、非小細胞性肺がん、悪性黒色腫、ブドウ膜メラノーマ、眼メラノーマ、胃がん、食道がん、膠芽細胞腫、神経膠肉腫、転移性脳腫瘍、肝がん、転移性肝臓がん、肝細胞がん、肝細胞上皮がん、大腸がん、結腸がん、すい臓がん、転移性すい臓がん、転移性頭部扁平上皮がん、乳がん、転移性乳がん、悪性胸膜中皮腫、転移性頸部扁平上皮がん、転移性鼻咽頭がん、HPV-16陽性固形がん、骨髄線維症、原発性骨髄線維症(Primary myelofibrosis, PMF)及び真性多血症(Polycythemia vera, PV)又は本態性血小板血症(Essential thrombocythemia, ET)から移行した骨髄線維症、原発性骨髄線維症、再発上皮性卵巣がん、卵管がん、腹膜がん、転移性肉腫、ホルモン抵抗性前立腺がん、副腎皮質がん、非ホジキンリンパ腫、B-細胞リンパ腫、B-細胞非ホジキンリンパ腫、ホジキンリンパ腫、急性骨髄性白血病、慢性骨髄性白血病、慢性リンパ球性リンパ腫、小リンパ球性リンパ腫、T-細胞白血病、T-細胞リンパ腫、濾胞性リンパ腫、骨髄異形成症候群などが挙げられる。
また、これらのがん患者のうち、β-カテニンが活性化されているがんに対して特に効果的である。
本発明において、CBP/カテニン阻害剤および免疫チェックポイント阻害剤を組み合わせてなるがん治療薬のそれぞれの投与量及び治療上有効な量の投与の時間を決めることは、十分当業者の知識の範囲である。例えば、最初の有効量は、細胞培養又はその他のインビトロアッセイから推定することができる。投与量は、動物モデルにおいて、細胞培養アッセイにより求められたIC50の濃度など、循環濃度又は組織濃度を作りだすように処方することができる。
この発明の目的に関して、投与の方法は治療されている状態及び治療薬に依存して選択される。CBP/カテニン阻害剤及び免疫チェックポイント阻害剤の投与は、多様な方法で行うことができ、例えば、限定はされないが、皮下、静脈内、腹膜内、筋肉内、及び、全身投与が好ましいが場合により特定の器官又は腫瘍への直接注入などが挙げられる。CBP/カテニン阻害剤及び免疫チェックポイント阻害剤の投与は、単一の経路を通してか、又は同時にいくつかの経路によりうる。
CBP/カテニン阻害剤及び免疫チェックポイント阻害剤は、とりわけ、治療適応及び処方医師の判断により、1日1回、1日2回~数回、又は更に1日複数回投与されうる。
治療効果を得るために必要なCBP/カテニン阻害剤及び免疫チェックポイント阻害剤の量は、特定の目的のための従来の手順に従って経験的に決定されうる。一般に、治療目的で細胞に投与するには、細胞は、薬理学的に有効な投与量にて与えられる。「薬理学的に有効な量」又は「薬理的に有効な投与量」とは、特に障害又は疾患の状態を治療するために、例えば障害又は疾患の1つ以上の症状又は兆候を低減又は取り除くことなど、所望の生理学的効果を生み出すのに十分なだけの量、又は所望の結果を達成できる量を指す。
本発明のCBP/カテニン阻害剤および免疫チェックポイント阻害剤を組み合わせてなるがん治療薬は、その他のがん治療、例えば、外科的切除、放射線療法、化学療法、免疫療法、並びに支持療法(例えば鎮痛剤、利尿薬、抗利尿薬、抗ウイルス薬、抗生物質、栄養剤、貧血治療、血液凝固治療、骨治療、並びに精神病理学的及び心理学的な治療)などと組み合わせられうる。
以下に実施例を示して、本発明をより詳細に説明するが、これらは本発明の範囲を限定するものではない。
ヒト乳がん細胞株(MDA-MB-231)をHoechst BlueとHoechst Redで2次元セルソートしたSide Population画分(がん幹細胞が濃縮されていると考えられている)に、0.3μMのCBP/カテニン阻害剤(化合物2)を培養液に添加して4日後にはSide Population画分はほぼ消失(薬剤未処理の場合1.6%のSP細胞が検出されたが、化合物2処理群では、0%であった。)し、がん幹細胞は分化したと考えられた(図3)。
根治切除不能な悪性黒色腫患者に、ニボルマブを1回2mg/kg(体重)を3週間間隔で点滴静注するとともに、CBP/β-カテニン阻害剤(化合物1)を30mg/m2/日を点滴静注する。
根治切除不能な悪性黒色腫患者に、イピリムマブを1回3mg/kg(体重)を3週間間隔で点滴静注するとともに、CBP/β-カテニン阻害剤(化合物1)を100mg/m2/日を点滴静注する。
トランスジェニックマウス(MMTV-Wnt-1)自然発症乳がんを継代移植したモデル動物におけるCBP/カテニン阻害剤(化合物A)と抗マウスPD-1(CD279)抗体の併用効果
乳腺上皮細胞に局所的にWnt-1を発現させたトランスジェニックマウス(MMTV-Wnt-1)の自然発症乳がんを採取し、背景系統となるマウス(C57BL/6J)にトラカールで移植継代した。移植継代した腫瘍が1.5g程度になった時点で摘出し、30mg程度の断片にし、各群5例のマウス(C57BL/6J)の体側皮下に移植した。腫瘍の生着を確認した後、化合物A(50mg/kg、1日2回、21日間、経口投与)および抗マウスPD-1抗体(Clone:RMP1-14、BioXCell)(10mg/kg、1週2回、3週間、腹腔投与)をそれぞれ単独で、あるいは併用で投与した。
投与開始日を0日とし、以下、4、7、11、14、18、および21日に、各マウスに発生した腫瘍の長径および短径を、デジマチックキャリパ(Mitsutoyo)で測定した。
以下の式に従って、腫瘍体積を算出した。
腫瘍体積TV(mm3)=腫瘍長径(mm)×腫瘍短径2(mm2)/2
TVの結果を表1にまとめた。化合物Aおよび抗マウスPD-1抗体を併用することにより、それぞれを単独投与した場合と比較して、統計的有意(*p<0.05)に優れた抗腫瘍効果を示した(Repeated measures ANOVA followed by Dunnett’s type multiple comparison)。
BALB/Cマウスに結腸直腸がん細胞を移植したモデル動物におけるCBP/カテニン阻害剤(化合物1)と抗マウスPD-L1抗体の併用効果
結腸直腸がん細胞であるCT26細胞を雌性BALB/Cマウスの右腹部に皮下移植した。平均80mm3の平均腫瘍サイズになるまで飼育した後、1群10例となるように以下に従って群分けした。
群1:ベヒクル群
群2:抗マウスPD-L1抗体単独投与群
群3:化合物1単独投与群
群4:化合物1及び抗マウスPD-L1抗体の併用投与群
化合物1(80mg/kg、1日1回、21日間、腹腔内投与)および抗マウスPD-L1抗体(カタログ番号:BE0101-100MG、BioXCell)(2mg/kg、1週2回、2週間、腹腔投与)をそれぞれ単独で、あるいは併用で投与した。
投与開始日を0日とし、以下、3、6、9、12、および15日に、各マウスに発生した腫瘍の長径および短径を測定した。
以下の式に従って、腫瘍体積を算出した。
腫瘍体積(mm3)=腫瘍長径(mm)×腫瘍短径2(mm2)/2
腫瘍体積の結果を図4にまとめた。化合物1および抗マウスPD-L1抗体を併用することにより、それぞれを単独投与した場合と比較して、統計的有意(*p<0.01)に優れた抗腫瘍効果を示した(Repeated measurement Two-Way ANOVA)。
CBP/カテニン阻害剤(化合物1)のIL-10産生抑制作用
米国NIHでヒト悪性黒色腫患者から樹立された細胞株(メラノーマ)である、624mel細胞及び928mel細胞を用いた。これらの細胞は活性化され、IL-10産生能を有している。
培養液(10%FCS含有RPMI1640、ペニシリン及びストレプトマイシン添加)中、1×105細胞/2ml/ウェルの濃度で各メラノーマ細胞を6ウェルプレートに播種した。播種後、化合物1を所定の濃度になるように添加し24時間培養した。24時間後に培養上清を回収し、上清中のIL-10の濃度を測定した。IL-10濃度の測定には、Human IL10 OptEIA ELISA set(BD社、♯555157)を用いた。
結果を図5に示す。
化合物1を1μM添加した場合はいずれの細胞においても増殖への影響が確認されたが、化合物1を0.2μM添加した場合はいずれの細胞においても増殖への影響は確認されなかった。増殖に影響が出ない条件下(0.2μM)でもIL-10の産生が抑制されたことから、化合物1がIL-10産生抑制作用を有していることがわかった。
免疫チェックポイント阻害剤である抗PD-1抗体や抗CTLA-4抗体に臨床で著効を示す患者は限定的であり、その効果はがん患者におけるCD-8陽性T細胞数に左右されることが知られている。特にCD-8陽性T細胞数とβ-カテニンの発現は完全に逆に相関しておりβ-カテニンの発現が高い組織では、T細胞が少なく、逆に発現が低い組織では、T細胞が多い。
CBP/カテニン阻害剤はβ-カテニンの発現が高い組織により高い効果を示すが、一方でそのIL-10産生抑制作用によりCD-8陽性T細胞数を増加させることができる。従って、CBP/カテニン阻害剤は免疫チェックポイント阻害剤と併用することによって、より高い抗がん効果が得られることがわかった。
Claims (12)
- CBP/カテニン阻害剤および免疫チェックポイント阻害剤を組み合わせてなるがん治療薬。
- 免疫チェックポイント阻害剤が、PD-1アンタゴニスト、PD-L1アンタゴニスト、PD-L2アンタゴニスト、CTLA-4アンタゴニスト、KIRアンタゴニスト、CD137アンタゴニスト、LAG3アンタゴニストおよびOX40アンタゴニストから選択される1種以上の免疫チェックポイント阻害剤である請求項1記載のがん治療薬。
- 免疫チェックポイント阻害剤が、抗PD-1抗体、抗PD-L1抗体、抗PD-L2抗体、抗CTLA-4抗体、抗KIR抗体、抗LAG3抗体および抗OX40抗体から選択されるが1種以上の免疫チェックポイント阻害剤である請求項1記載のがん治療薬。
- CBP/カテニン阻害剤が、CBP/カテニン阻害活性をもつα-へリックス模倣化合物である請求項1~3のいずれか1項に記載のがん治療薬。
- 前記α-へリックス模倣化合物がWO2003/031448、WO2004/093828、WO2005/116032、WO2009/148192、WO2010/044485、WO2010/128685、WO2012/115286、及び/又はWO2015/098853に記載されるα-へリックス模倣化合物のいずれか1種以上の化合物である請求項4記載のがん治療薬。
- CBP/カテニン阻害剤が下記の化合物から選ばれる1種以上である請求項1~4のいずれか1項に記載のがん治療薬。
(6S,9aS)-N-ベンジル-6-[(4-ヒドロキシフェニル)メチル]-8-(ナフタレン-1-イルメチル)-4,7-ジオキソ-3,6,9,9a-テトラヒドロ-2H-ピラジノ[1,2-a]ピリミジン-1-カルボキサミド(ICG-001)、
4-(((6S,9S,9aS)-1-(ベンジルカルバモイル)-2,9-ジメチル-4,7-ジオキソ-8-(キノリン-8-イルメチル)オクタヒドロ-1H-ピラジノ[2,1-c][1,2,4]トリアジン-6-イル)メチル)フェニル ジハイドロゲンホスフェート、
(6S,9S,9aS)-N-ベンジル-6-(4-ヒドロキシベンジル)-2,9-ジメチル-4,7-ジオキソ-8-(キノリン-8-イルメチル)オクタヒドロ-1H-ピラジノ[2,1-c][1,2,4]トリアジン-1-カルボキサミド、及び
(6S,9aS)-N-ベンジル-8-((6-(3-(4-エチルピペラジン-1-イル)アゼチジン-1-イル)ピリジン-2-イル)メチル)-6-((2-フルオロ-4-ヒドロキシフェニル)メチル)-4,7-ジオキソ-2-(プロプ-2-エン-1-イル)-オクタヒドロ-1H-ピラジノ[2,1-c][1,2,4]トリアジン-1-カルボキサミド - 有効量のCBP/カテニン阻害剤および有効量の免疫チェックポイント阻害剤をそれを必要とする対象に投与することを含む、がんの治療方法。
- 免疫チェックポイント阻害剤が、PD-1アンタゴニスト、PD-L1アンタゴニスト、PD-L2アンタゴニスト、CTLA-4アンタゴニスト、KIRアンタゴニスト、CD137アンタゴニスト、LAG3アンタゴニストおよびOX40アンタゴニストから選択される1種以上の免疫チェックポイント阻害剤である請求項7記載の方法。
- 免疫チェックポイント阻害剤が、抗PD-1抗体、抗PD-L1抗体、抗PD-L2抗体、抗CTLA-4抗体、抗KIR抗体、抗LAG3抗体および抗OX40抗体から選択される1種以上の免疫チェックポイント阻害剤である請求項7記載の方法。
- CBP/カテニン阻害剤が、CBP/カテニン阻害活性をもつα-へリックス模倣化合物である請求項7~9のいずれか1項に記載の方法。
- 前記α-へリックス模倣化合物がWO2003/031448、WO2004/093828、WO2005/116032、WO2009/148192、WO2010/044485、WO2010/128685、WO2012/115286、及び/又はWO2015/098853に記載されるα-へリックス模倣化合物のいずれか1種以上の化合物である請求項10記載の方法。
- CBP/カテニン阻害剤が下記化合物から選ばれる1種以上である請求項7~10のいずれか1項に記載の方法。
(6S,9aS)-N-ベンジル-6-[(4-ヒドロキシフェニル)メチル]-8-(ナフタレン-1-イルメチル)-4,7-ジオキソ-3,6,9,9a-テトラヒドロ-2H-ピラジノ[1,2-a]ピリミジン-1-カルボキサミド(ICG-001)、
4-(((6S,9S,9aS)-1-(ベンジルカルバモイル)-2,9-ジメチル-4,7-ジオキソ-8-(キノリン-8-イルメチル)オクタヒドロ-1H-ピラジノ[2,1-c][1,2,4]トリアジン-6-イル)メチル)フェニル ジハイドロゲンホスフェート、
(6S,9S,9aS)-N-ベンジル-6-(4-ヒドロキシベンジル)-2,9-ジメチル-4,7-ジオキソ-8-(キノリン-8-イルメチル)オクタヒドロ-1H-ピラジノ[2,1-c][1,2,4]トリアジン-1-カルボキサミド、及び
(6S,9aS)-N-ベンジル-8-((6-(3-(4-エチルピペラジン-1-イル)アゼチジン-1-イル)ピリジン-2-イル)メチル)-6-((2-フルオロ-4-ヒドロキシフェニル)メチル)-4,7-ジオキソ-2-(プロプ-2-エン-1-イル)-オクタヒドロ-1H-ピラジノ[2,1-c][1,2,4]トリアジン-1-カルボキサミド
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| US11369623B2 (en) | 2015-06-16 | 2022-06-28 | Prism Pharma Co., Ltd. | Anticancer combination of a CBP/catenin inhibitor and an immune checkpoint inhibitor |
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| JPWO2018147275A1 (ja) * | 2017-02-08 | 2019-11-07 | エーザイ・アール・アンド・ディー・マネジメント株式会社 | 腫瘍治療用医薬組成物 |
| KR102539920B1 (ko) | 2017-02-08 | 2023-06-05 | 에자이 알앤드디 매니지먼트 가부시키가이샤 | 종양-치료용 약제학적 조성물 |
| US12303505B2 (en) | 2017-02-08 | 2025-05-20 | Eisai R&D Management Co., Ltd. | Tumor-treating pharmaceutical composition |
| KR20190110525A (ko) * | 2017-02-08 | 2019-09-30 | 에자이 알앤드디 매니지먼트 가부시키가이샤 | 종양-치료용 약제학적 조성물 |
| US12226409B2 (en) | 2017-05-16 | 2025-02-18 | Eisai R&D Management Co., Ltd. | Treatment of hepatocellular carcinoma |
| JP2021509669A (ja) * | 2018-01-05 | 2021-04-01 | ディセルナ ファーマシューティカルズ インコーポレイテッド | 免疫療法を強化するためのベータ−カテニン及びidoの発現の低減 |
| EP4473970A4 (en) * | 2022-03-31 | 2026-01-21 | Eisai R&D Man Co Ltd | PHARMACEUTICAL COMPOSITION FOR THE TREATMENT OF TUMORS |
Also Published As
| Publication number | Publication date |
|---|---|
| SG11201710198YA (en) | 2018-01-30 |
| US20180185395A1 (en) | 2018-07-05 |
| CA2988707A1 (en) | 2016-12-22 |
| EP3311841B1 (en) | 2021-07-28 |
| JP6757959B2 (ja) | 2020-09-23 |
| ES2886107T3 (es) | 2021-12-16 |
| KR20180018695A (ko) | 2018-02-21 |
| RU2729936C2 (ru) | 2020-08-13 |
| EP3311841A4 (en) | 2019-02-13 |
| IL256148A (en) | 2018-02-28 |
| CN107801379A (zh) | 2018-03-13 |
| BR112017027227B1 (pt) | 2023-12-12 |
| KR102705821B1 (ko) | 2024-09-12 |
| CA2988707C (en) | 2023-10-10 |
| RU2018100944A (ru) | 2019-07-16 |
| JPWO2016204193A1 (ja) | 2018-04-05 |
| AU2016279474B2 (en) | 2021-09-09 |
| BR112017027227A2 (ja) | 2018-08-21 |
| IL256148B (en) | 2022-04-01 |
| MX2017015896A (es) | 2018-08-09 |
| MX373231B (es) | 2020-05-08 |
| EP3311841A1 (en) | 2018-04-25 |
| CN107801379B (zh) | 2021-05-25 |
| US11369623B2 (en) | 2022-06-28 |
| RU2018100944A3 (ja) | 2019-12-18 |
| AU2016279474A1 (en) | 2018-02-01 |
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