WO2020090705A1 - 網膜神経節細胞死抑制剤 - Google Patents
網膜神経節細胞死抑制剤 Download PDFInfo
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Definitions
- the present invention relates to suppression of retinal ganglion cell death using a BMPR (BMP receptor) signaling inhibitor, and prevention or treatment of diseases related to retinal ganglion cell death.
- BMPR BMP receptor
- Glaucoma is a progressive disease with characteristic changes in the optic nerve and visual field, which can cause loss of vision and blindness.
- the onset mechanism of glaucoma is not fully understood, but it is considered to be one of the causes of retinal ganglion cell death.
- the cause of retinal ganglion cell death is intracellular nutrient depletion and oxidative stress due to increased intraocular pressure. It is believed that.
- eye diseases that cause blindness and reduced visual acuity often cause retinal ganglion cell death.
- Patent Document 1 As mentioned above, conventional reports on BMP suggest that activation of the BMP signal transduction system leads to suppression of retinal ganglion cell death (Patent Document 1 and Non-Patent Document 1).
- the present invention clarifies the mechanism that causes retinal ganglion cell death, and provides new means for neuroprotection of the retina based on the mechanism and prevention or treatment of diseases associated with retinal ganglion cell death.
- BMPR BMPR signaling system
- BMP receptor retinal ganglion cell death
- the present invention relates to the following (1) to (21).
- a retinal ganglion cell death inhibitor containing a BMPR signal transduction inhibitor containing a BMPR signal transduction inhibitor.
- the BMPR signaling inhibitor is an anti-ALK3 antibody or a fragment thereof, an anti-BMP4 antibody or a fragment thereof, Dorsomorphin (6- [4- (2-piperidin-1-ylethoxy) phenyl] -3-pyridin-4-ylpyrazolo [1,5-a] pyrimidine), LDN-193189 (4- [6- (4-piperazin-1-yl-phenyl) -pyrazolo [1,5- ⁇ ] pyrimidin-3-yl] -quinoline), 2 -(3- (6-Methylpyridin-2-yl) -1H-pyrazol-4-yl) -1,5-naphthyridine, K02288 (3- [6-amino-5- (3,4,5-trimethoxy (Phenyl) -3-pyridinyl] -phenol), DMH-1 (4- [6- [4- (1-methylethoxy) phenyl] pyrazolo [1,5
- a target antigen for example, Fab, F (ab ') 2 , Fv, scFv, scFv-Fc, minibody
- the retinal ganglion cell death inhibitor according to (3) which is any one selected from the group consisting of: (5)
- a retinal neuroprotective agent comprising the retinal ganglion cell death inhibitor according to any one of (1) to (4).
- a pharmaceutical composition for preventing or treating a disease associated with retinal ganglion cell death which comprises the retinal ganglion cell death inhibitor according to any one of (1) to (4).
- Diseases associated with retinal ganglion cell death include glaucoma, diabetic retinopathy, retinal vascular occlusion, ischemic optic neuropathy, diseases associated with choroidal neovascularization, Leber's disease, dominant hereditary optic atrophy, optic neuritis And the pharmaceutical composition according to (6), which is any one or more selected from the group consisting of :, and aniridia.
- An auxiliary agent for optic nerve cell transplant which comprises the retinal ganglion cell death inhibitor according to any one of (1) to (4).
- An optic nerve cell which comprises culturing an optic nerve cell (for example, an optic nerve cell for transplantation) in the presence of the retinal ganglion cell death inhibitor according to any one of (1) to (4). Culture method.
- a method for suppressing retinal ganglion cell death comprising the following step (a) or (b): (A) administering an effective amount of a BMPR signaling inhibitor to a subject in need thereof, or (B) A step of culturing retinal ganglion cells in the presence of an effective amount of a BMPR signaling inhibitor.
- the BMPR signaling inhibitor further comprises the feature described in any one of the items (2) to (4) or a plurality of the items.
- a method for protecting a retinal nerve which comprises the following step (a) or (b): (A) administering an effective amount of a BMPR signaling inhibitor to a subject in need thereof, or (B) A step of culturing the retinal nerve in the presence of an effective amount of a BMPR signaling inhibitor.
- the BMPR signaling inhibitor further comprises the feature described in any one of the items (2) to (4) or a plurality of the items.
- a method for preventing or treating a disease associated with retinal ganglion cell death which comprises the step of administering an effective amount of a BMPR signaling inhibitor to a subject in need of the prevention or treatment. ,Method.
- the BMPR signaling inhibitor further comprises the feature described in any one of the items (2) to (4) or a plurality of the items.
- the disease associated with retinal ganglion cell death is the disease according to (7).
- the BMPR signaling inhibitor further comprises the feature described in any one of the items (2) to (4) or a plurality of the items.
- the inhibitor according to (20), wherein the disease associated with retinal ganglion cell death further comprises the feature according to (7).
- retinal ganglion cell death can be effectively suppressed, and the retinal nerve can be effectively protected.
- This provides a novel method for preventing and treating diseases associated with retinal ganglion cell death, for example, serious eye diseases such as glaucoma, diabetic retinopathy, and retinal vascular occlusion that lead to blindness.
- FIG. 1A and 1B show the results of confirming the specificity of the anti-ALK3 antibody and anti-ALK4 antibody used in the examples.
- FIG. 1A shows, from the left, those obtained by reacting only the size marker and anti-ALK3 antibody, and those obtained by reacting the size marker, anti-ALK3 antibody and ALK3 peptide.
- FIG. 1B shows, from the left, those obtained by reacting only anti-ALK4 antibody, those obtained by reacting anti-ALK4 antibody with ALK4 peptide, and size markers.
- FIG. 1C shows the effect of BMPR signaling inhibitor on retinal ganglion cell death induced by menadione.
- the vertical axis is the ratio of the number of viable cells to the total number of cells (%), the horizontal axis is from the left, control group (no menadione added, normal rabbit IgG added), Normal IgG treated group (menadione and normal rabbit IgG added), anti-ALK3 Antibody treatment group (menadione and anti-ALK3 antibody addition), anti-ALK4 antibody treatment group (menadione and anti-ALK4 antibody addition), K02288 treatment group (menadione and K02288 addition).
- * P ⁇ 0.05 Student's t-test vs vs Normal IgG processing group, n 3 FIG.
- FIG. 2A shows the effect of BMPR signaling inhibitor K02288 on menadione-induced retinal ganglion cell death.
- the vertical axis is the ratio (%) of the number of viable cells to the menadion single treatment group, and the horizontal axis is from the left, the control group (without menadion added), menadion single treatment group, K02288 100nM treatment group, K02288 1 ⁇ M treatment group, K02288 10 ⁇ M Treatment group.
- * P ⁇ 0.05 Dunnett's test vs menadion alone treatment group, n 8
- FIG. 2B shows the effect of the BMPR signaling inhibitor LDN-193189 on menadion-induced retinal ganglion cell death.
- the vertical axis is the ratio of the number of viable cells to the menadion single treatment group (%), the horizontal axis is from the left, the control group (without menadion added), menadion single treatment group, LDN-193189 100nM treatment group, LDN-193189 1 ⁇ M treatment group.
- * P ⁇ 0.05 Dunnett ’s test vs menadion alone treatment group, n 6
- FIG. 3 shows the mRNA expression level of each receptor of the TGF ⁇ superfamily in retinal ganglion cells.
- the vertical axis is the copy number in 1ng of RNA
- the horizontal axis is from the left, ALK4, Bmpr2, Acvr2a, Acvr2b, ALK2, ALK3, ALK6, ALK7.
- FIG. 4 shows the expression level of BMP ligand mRNA in retinal ganglion cells when treated with menadione.
- the vertical axis represents the ratio of the copy number when the menadione treatment was performed for 6 hours to the expression level at 0 hours of menadione treatment, and the horizontal axis is Tgfb1, Tgfb2, Bmp2, Bmp4, Bmp7, Inhba, and Gdf5 from the left.
- n 2
- the present invention uses a BMPR signaling inhibitor as an active ingredient in suppressing retinal ganglion cell death, protecting retinal nerves, or preventing or treating diseases related to retinal ganglion cell death.
- the BMPR signal transduction inhibitor according to the present invention is a substance that inhibits BMPR signal transduction via an interaction between BMP and BMPR.
- the BMPR signal transduction inhibitor may have a function as a BMP signal transduction inhibitor.
- BMP is a group of proteins belonging to the TGF ⁇ superfamily. BMP has been identified as a molecule that induces or promotes the differentiation of bone and cartilage, but like other TGF ⁇ superfamily molecules, it plays an important role in cell proliferation, differentiation, and regulation of apoptosis. I understand.
- BMPR a BMP receptor, exists on the surface of various cells, and BMP binds as a ligand to transmit a signal into the nucleus.
- BMP2, BMP4, BMP5, BMP6, BMP7, BMP8A, BMP8B, BMP9, BMP10, GDF5, GDF6, GDF7 and the like are known as ligands of the BMPR signal transduction pathway.
- the BMP family can be divided into BMP2 / 4, BMP5 / 6/7/8 (Osteogenic Protein-1 (OP-1)), BMP9 / 10, and GDF5 / 6/7 subfamilies.
- BMP2 / 4 includes BMP2 and BMP4,
- BMP5 / 6/7/8 (Osteogenic Protein-1 (OP-1)) includes BMP5, BMP6, BMP7, BMP8A, and BMP8B
- BMP9 / 10 includes BMP9 and BMP10.
- Including, GDF5 / 6/7 includes GDF5, GDF6 and GDF7.
- BMPR is a serine / threonine kinase type receptor, and there are BMPI type receptors and BMP type II receptors (also referred to as “type I receptors” and “type II receptors” in this specification).
- Activin Receptor-like Kinase (ALK) 1 ACVRL1, SKR3
- ALK2 ACVR1, ACTRI
- ALK3 BMPR1A
- ALK6 BMPR1B
- type I receptors and type II receptors are known.
- BMPR2, ACTRIIA, ACTRIIB are known (other names in parentheses).
- BMPR signal transduction requires that two type I and two type II receptors form a heterotetramer and bind to the ligand BMP.
- the binding mode between the heterotetramer and the ligand after the type I receptor and the type II receptor form a heterotetramer, the mode in which the ligand binds, the type I receptor and the ligand first bind, After that, there is a mode of recruiting type II receptors.
- the binding of the heterotetramer and the ligand activates BMPR signaling, but it has been suggested that the signaling pathway is different depending on the binding mode.
- the SMAD pathway via the SMAD protein is known for BMPR signal transduction.
- BMPR bound to BMP is translocated into the cell, phosphorylates SMAD1 / 5/8 by kinase activity, and the phosphorylated SMAD molecule forms a complex with SMAD4 and translocates into the nucleus, where it is transcribed. It regulates gene expression as a regulator.
- SMAD pathway there are non-SMAD pathways that do not pass through the SMAD molecule as the signal transduction pathway of BMPR (Tian XY et al., J Mol Cell Cardiol. 2012 Jan; 52 (1): 237-44). ..
- the BMPR signal transduction inhibitor of the present invention acts on any stage of the BMPR signal transduction pathway described above, and inhibits signal transduction mediated by BMP and BMPR. Therefore, as the BMPR signaling inhibitor of the present invention, (1) Substances that block or inhibit BMP binding to BMPR: For example, BMPR antagonist or antagonist antibody (neutralizing antibody), anti-BMPR antibody, BMP antagonist or antagonist antibody (neutralizing antibody), anti-BMP antibody, dominant negative Type BMP, dominant negative type BMPR; (2) substances that suppress the expression of BMP and BMPR: For example, substances that inhibit the transcription of BMP and BMPR genes, substances that inhibit the processing of early transcripts into mRNA, substances that inhibit the transport of mRNA into the cytoplasm, Substances that promote degradation of mRNA, substances that inhibit translation of mRNA into protein, substances that inhibit post-translational modification of protein, preferably antisense nucleic acid or small interfering RNA (siRNA) for BMP or BMPR mRNA;
- the BMPR signaling inhibitor of the present invention may be a protein such as an antibody, a nucleic acid molecule such as an antisense nucleic acid or siRNA, or a low molecular weight compound.
- BMPR signaling inhibitor of the present invention examples include natural molecules Noggin, Chordin, Follistatin, Cerberus, and Gremlin, as well as anti-BMP antibodies (particularly anti-BMP4 antibodies) and anti-antibody antagonist antibodies.
- anti-BMP antibodies particularly anti-BMP4 antibodies
- anti-antibody antagonist antibodies examples thereof include BMPR antibody (preferably anti-ALK3 antibody), dominant negative BMP (preferably dominant negative BMP4), dominant negative BMPR (preferably dominant negative ALK3) and the like.
- the low molecular weight compound that can be used as the BMPR signaling inhibitor of the present invention include Dorsomorphin (6- [4- (2-piperidin-1-ylethoxy) phenyl] -3-pyridin-4-ylpyrazolo [1,5 -a] Pyrimidine) (Cosmo Bio, MedChem Express) (PLoS One.
- LDN-212854 (6- (4- (1-piperazinyl) phenyl) pyrazolo [1,5- ⁇ ] pyrimidin-3-yl) quinoline) (Selleck) (Bone.2018 Apr; 109: 251-258 (doi: 10.1016 / j.bone.2017.09.004.)
- LDN-214117 (1- [4- [6-methyl-5- (3,4,5-trimethoxyphenyl) -3-pyridinyl] ] Phenyl] piperazine) (JMedChem.2014 Oct 9; 57 (19): 7900-15.
- the low molecular weight compound that can be used as the BMPR signaling inhibitor of the present invention include International Publication 2015/103355, International Publication 2012/065059, International Publication 2018/124001, International Publication 2016/011019, International Publication 2010 / The compounds disclosed in 114860, International Publication 2015/148654, International Publication 2011/116212, International Publication 2014/160203, International Publication 2016/054406 and the like can be mentioned.
- the BMPR signal transduction inhibitor is preferably a type I receptor signal transduction inhibitor. Further, the BMPR signal transduction inhibitor is a substance capable of inhibiting BMPR signal transduction by binding BMP including BMP4 as a ligand to a receptor. More preferably the BMPR signaling inhibitor is an ALK3 signaling inhibitor.
- ALK3 signaling inhibitor ALK3 (Activin Receptor-like Kinase 3) is also known as BMP receptor 1A (BMPR1A).
- ALK3 (BMPR1A) is one of the type I receptors of the BMP family, and forms a heterotetramer with the same type I receptor BMPR1B and type II receptor BMPR2 and binds to the ligand Allows signal transduction into.
- the ALK3 signal transduction inhibitor according to the present invention acts on any stage of the signal transduction pathway from ALK3, and inhibits ALK3 ligand and ALK3-mediated signal transduction. Further, the ALK3 signaling inhibitor of the present invention, by blocking or inhibiting the interaction between the ligand and ALK3, or by suppressing the expression of ALK3 or its ligand, a substance that inhibits the function of ALK3 (ie, ALK3 inhibitor).
- ALK3 ligands include BMP4, BMP2, BMP6, BMP7, with the preferred ligand being BMP4.
- the low molecular weight compound that can be used as the ALK3 signal transduction inhibitor of the present invention include Dorsomorphin (6- [4- (2-piperidin-1-ylethoxy) phenyl] -3-pyridin-4-ylpyrazolo [1,5 -a] Pyrimidine) (Cosmo Bio, MedChem Express) (PLoS One.
- low molecular weight compound which can be used as the ALK3 signaling inhibitor of the present invention include International Publication 2015/103355, International Publication 2012/065059, International Publication 2018/124001, International Publication 2016/011019, International Publication 2010 / The compounds disclosed in 114860, International Publication 2015/148654, International Publication 2011/116212, International Publication 2014/160203, International Publication 2016/054406 and the like can be mentioned.
- ALK3 signal transduction inhibitors include ALK3 ligand antagonists (including antagonist antibodies (anti-ALK3 ligand antibodies)), ALK3 antagonists (including antagonist antibodies (anti-ALK3 antibody)), dominant negative ALK3 ligands, dominant negative ALK3:
- ALK3 signaling inhibitor preferably acts specifically on ALK3 or an ALK3 ligand.
- an antisense nucleic acid or siRNA preferably acts specifically on a nucleic acid encoding ALK3 or an ALK3 ligand and does not act on a nucleic acid encoding another ALK family.
- the antibody used as the BMPR signaling inhibitor may be either a polyclonal antibody or a monoclonal antibody, but is preferably a monoclonal antibody. These antibodies can be produced according to methods known in the art.
- the isotype of the antibody is not particularly limited, but preferably IgG, IgM or IgA, particularly preferably IgG.
- the antibody is not particularly limited as long as it has at least a complementarity determining region (CDR) for specifically recognizing and binding a target antigen, and in addition to a complete antibody molecule, Fab, Fab ', F (ab ') Modified with a genetically engineered conjugate molecule such as a fragment such as 2 or scFv, scFv-Fc, minibody, diabody, or a molecule having a protein stabilizing action such as polyethylene glycol (PEG) It may be a derivative thereof or the like.
- “antibody” includes derivatives such as PEGylated antibodies, and “fragments” of antibodies also include conjugate molecules such as scFv, scFv-Fc, minibodies and diabodies.
- the above-mentioned antibody may be a commercially available one or may be prepared according to a conventional method.
- the antibody is preferably a chimeric antibody, a humanized antibody or a fully human antibody in order to reduce the heterologous antigenicity to humans.
- Dominant Negative The dominant negative used as a BMPR signal transduction inhibitor is a mutant protein of the normal protein, which is a mutant protein that functions more predominantly than the normal protein and inhibits the action of the normal protein to inhibit BMP signal transduction. ..
- Dominant negative type protein by using a technique known in the art, such as by using a commercially available kit, a mutation is introduced into the sequence of the normal protein, and the effect on BMPR signaling can be compared with that of the normal protein. It can be made.
- the antisense nucleic acid (antisense nucleic acid of the present invention) used as a BMPR signal transduction inhibitor is a base sequence complementary or substantially complementary to the base sequence of mRNA of a molecule involved in BMPR signal transduction, or a part thereof. It has a function of suppressing protein synthesis by forming a specific and stable double strand with a target mRNA and binding thereto.
- the antisense nucleic acid may be any of double-stranded DNA, single-stranded DNA, double-stranded RNA, single-stranded RNA, and DNA: RNA hybrid.
- the target region of the antisense nucleic acid is not particularly limited in length as long as the translation of the mRNA is inhibited as a result of the hybridization of the antisense nucleic acid, and it is the entire sequence of the mRNA of the target molecule. It may be a partial sequence, a short one is about 10 bases, and a long one is the entire sequence of mRNA or initial transcription product. Considering the problems of easiness of synthesis, antigenicity, intracellular transfer, etc., an oligonucleotide consisting of about 10 to about 40 bases, particularly about 15 to about 30 bases is preferable, but not limited thereto.
- 5'end hairpin loop of target gene 5'end 6-base pair repeat, 5'end untranslated region, translation initiation codon, protein coding region, ORF translation stop codon, 3'end non A translation region, a 3'-end palindromic region, a 3'-end hairpin loop, or the like can be selected as a preferred target region of an antisense nucleic acid, but is not limited thereto.
- the nucleotide molecule constituting the antisense nucleic acid may be a natural nucleic acid, but contains various chemical modifications in order to improve stability (chemical and / or enzyme) and specific activity (affinity with RNA). be able to.
- the antisense nucleic acid may be in the form of antigene. Antisense nucleic acids containing such various modifications can be synthesized according to methods known in the art.
- siRNA small interfering RNA
- siRNA is a double-stranded RNA consisting of an oligo RNA complementary to the mRNA of the target molecule and its complementary strand, and can be synthesized according to a method known in the art based on the nucleotide sequence information of the mRNA of the target molecule.
- the sense and antisense strands of the target sequence on mRNA were respectively synthesized by an automatic DNA / RNA synthesizer and denatured in an appropriate annealing buffer at about 90 to about 95 ° C for about 1 minute. Then, it can be prepared by annealing at about 30 to about 70 ° C. for about 1 to about 8 hours. It can also be prepared by synthesizing short hairpin RNA (shRNA) that is a precursor of siRNA and cleaving it with a dicer.
- shRNA short hairpin RNA
- Ribonucleotide molecules that make up siRNA can also include chemical modifications in order to improve stability, specific activity, etc., as long as RNAi activity is not lost.
- siRNA also includes a nucleic acid designed to produce the siRNA.
- a nucleic acid examples include shRNA and an expression vector constructed to express it.
- shRNA is an oligo containing a base sequence in which a sense sequence and an antisense strand of a target sequence on mRNA are inserted by interposing a spacer sequence having a length (for example, about 15 to 25 bases) that can form an appropriate loop structure. It can be prepared by designing RNA and synthesizing it with an automatic DNA / RNA synthesizer.
- An expression vector containing an shRNA expression cassette can be prepared by preparing a double-stranded DNA encoding the above shRNA by a conventional method and then inserting it into an appropriate expression vector.
- the present invention provides a retinal ganglion cell death inhibitor containing a BMPR signaling inhibitor.
- the present invention also provides (a) a step of administering an effective amount of a BMPR signaling inhibitor to a subject in need thereof; or (b) the presence of an effective amount of a BMPR signaling inhibitor in the retina.
- a method for suppressing retinal ganglion cell death which comprises the step of culturing ganglion cells.
- the invention provides BMPR signaling inhibitors for use in inhibiting retinal ganglion cell death.
- Retinal ganglion cells are nerve cells that are present on the inner surface of the retina and that convert visual information received from photoreceptor cells into electrical signals that are transmitted to the brain. Since retinal ganglion cells do not regenerate, elucidation of the mechanism of retinal ganglion cell death is important for prevention or treatment of various eye diseases such as glaucoma.
- the retinal ganglion cell death inhibitor which is one embodiment, BMPR signal transduction inhibitor as an active ingredient, cell death of retinal ganglion cells by inhibiting signal transduction from BMPR (apoptosis or necrosis, preferably, Apoptosis).
- suppression of retinal ganglion cell death includes stopping or delaying the progression of retinal ganglion cell death. More specifically, suppressing retinal ganglion cell death means that the survival rate of retinal ganglion cells is higher in the presence of the BMPR signaling inhibitor than in the absence of the BMPR signaling inhibitor. means.
- the cell survival rate can be analyzed by a known method, but specifically, it can be confirmed by the method described in the examples.
- the BMPR signal transduction inhibitor is preferably a type I receptor signal transduction inhibitor, more preferably an ALK3 signal transduction inhibitor.
- the retinal ganglion cell death inhibitor of the present invention may contain a pharmacologically acceptable carrier in addition to the BMPR signaling inhibitor.
- pharmacologically acceptable carrier include various organic or inorganic carrier substances conventionally used as pharmaceutical materials, for example, an excipient, a lubricant, a binder and a disintegrant in a solid formulation, or a solvent in a liquid formulation. , Solubilizing agents, suspending agents, isotonic agents, buffering agents, soothing agents and the like. Further, if necessary, conventional additives such as antiseptics, antioxidants, colorants, sweeteners, adsorbents, and wetting agents can be used.
- Excipients include, for example, lactose, sucrose, D-mannitol, starch, corn starch, crystalline cellulose, light anhydrous silicic acid and the like.
- examples of the lubricant include magnesium stearate, calcium stearate, talc, colloidal silica and the like.
- examples of the binder include crystalline cellulose, sucrose, D-mannitol, dextrin, hydroxypropylcellulose, hydroxypropylmethylcellulose, polyvinylpyrrolidone, starch, sucrose, gelatin, methylcellulose, sodium carboxymethylcellulose and the like.
- Examples of the disintegrant include starch, carboxymethyl cellulose, carboxymethyl cellulose calcium, sodium carboxymethyl starch, L-hydroxypropyl cellulose and the like.
- Examples of the solvent include water for injection, alcohol, propylene glycol, macrogol, sesame oil, corn oil, olive oil and the like.
- Examples of the solubilizing agent include polyethylene glycol, propylene glycol, D-mannitol, benzyl benzoate, ethanol, trisaminomethane, cholesterol, triethanolamine, sodium carbonate, sodium citrate and the like.
- suspending agent examples include surfactants such as stearyltriethanolamine, sodium lauryl sulfate, laurylaminopropionic acid, lecithin, benzalkonium chloride, benzethonium chloride, and glycerin monostearate; for example, polyvinyl alcohol, polyvinylpyrrolidone. , Hydrophilic polymers such as sodium carboxymethyl cellulose, methyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl cellulose.
- tonicity agent examples include glucose, D-sorbitol, sodium chloride, glycerin, D-mannitol and the like.
- Examples of the buffer include phosphate buffer, acetate buffer, carbonate buffer, citrate buffer, and the like.
- soothing agents include benzyl alcohol and the like.
- Examples of preservatives include parahydroxybenzoic acid esters, chlorobutanol, benzyl alcohol, phenethyl alcohol, dehydroacetic acid, sorbic acid and the like.
- Examples of the antioxidant include sulfite, ascorbic acid, ⁇ -tocopherol and the like.
- Examples of the colorant include water-soluble food tar dyes (eg, food red Nos. 2 and 3, food yellows No. 4 and 5, food blue Nos.
- water-insoluble lake dyes Aluminum salts of the water-soluble food tar pigments), natural pigments (eg ⁇ -carotene, chlorophyll, red iron oxide) and the like.
- sweetener include saccharin sodium, dipotassium glycyrrhizinate, aspartame, stevia and the like.
- the pharmaceutically acceptable carrier examples include stabilizers, solubilizers, suspending agents, emulsifiers, isotonic agents, buffers, thickeners, preservatives, pH adjusting agents in eye drops or eye ointments. Additives such as an agent, a cooling agent and an ointment base can also be used.
- stabilizers include sodium hydrogen sulfite, sodium thiosulfate, sodium edetate, sodium citrate, ascorbic acid, dibutylhydroxytoluene, and the like.
- solubilizing agent include glycerin, propylene glycol, macrogol, polyoxyethylene hydrogenated castor oil, and the like.
- suspending agent include polyvinylpyrrolidone, hydroxypropylmethyl cellulose, hydroxymethyl cellulose, sodium carboxymethyl cellulose and the like.
- the emulsifier include polyvinylpyrrolidone, soybean lecithin, egg yolk lecithin, polyoxyethylene hydrogenated castor oil, polysorbate 80 and the like.
- Examples of the isotonicity agent include sodium chloride, potassium chloride, glycerin, mannitol, sorbitol, boric acid, glucose, propylene glycol and the like.
- Examples of the buffer include phosphate buffer, acetate buffer, borate buffer, carbonate buffer, citrate buffer, Tris buffer, glutamic acid, epsilon aminocaproic acid and the like.
- the thickener examples include water-soluble cellulose derivatives such as methyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, and carboxymethyl cellulose, sodium chondroitin sulfate, sodium hyaluronate, carboxyvinyl polymer, polyvinyl alcohol, polyvinylpyrrolidone, and macrogol. ..
- the preservative include benzalkonium chloride, benzethonium chloride, chlorhexidine gluconate, chlorobutanol, benzyl alcohol, sodium dehydroacetate, paraoxybenzoic acid esters, sodium edetate and boric acid.
- Examples of the pH adjuster include hydrochloric acid, sodium hydroxide, phosphoric acid, acetic acid and the like.
- Examples of the cooling agent include l-menthol, d-camphor, d-borneol, peppermint oil and the like.
- Examples of the ointment base include white petrolatum, purified lanolin, liquid paraffin, vegetable oil (olive oil, camellia oil, peanut oil, etc.).
- the retinal ganglion cell death inhibitor according to the present invention may be formulated according to a method known in the art, in which a BMPR signal transduction inhibitor is used alone or in combination with a pharmacologically acceptable carrier. it can.
- Formulations include eye drops, eye ointments, injections (eg, intravitreal injection, subconjunctival injection, sub-Tenon injection, subcutaneous injection, intravenous injection, intramuscular injection, intraperitoneal injection).
- Liquids, emulsions, suspensions, tablets (sugar-coated tablets, film-coated tablets, sublingual tablets, buccal tablets, buccal tablets), pills, powders, granules, capsules, troches, syrups, controlled-release formulations, Aerosol, film, drip, transdermal formulation, ointment, lotion, patch, suppository (eg rectal suppository, vaginal suppository), pellet, nasal agent, pulmonary agent (inhalant) ) Etc. are illustrated.
- the retinal ganglion cell death inhibitor as the above-mentioned preparation, is orally or parenterally (eg, intravenously, intramuscularly, subcutaneously, in organs, intranasally, intradermally) for mammals (preferably humans).
- Ocular topical administration eyedrop administration, intravitreal administration, subconjunctival administration, subtenon administration, etc.
- intracerebral, rectal, vaginal, intraperitoneal, and affected sites can be safely administered.
- isotonic agents such as sodium chloride and concentrated glycerin
- buffering agents such as sodium phosphate and sodium acetate, polyoxyethylene sorbitan monooleate, polyoxyl stearate 40, polyoxyethylene hardened castor
- a surfactant such as oil, a stabilizer such as sodium citrate and sodium edetate, a preservative such as benzalkonium chloride and paraben can be used, if necessary.
- the preferred solvent used for the eye drops is purified water.
- eye ointment When manufacturing eye ointment, it can be prepared using a widely used base such as white petrolatum and liquid paraffin.
- oral agents such as tablets, capsules, granules, fine granules and powders include bulking agents such as lactose, crystalline cellulose, starch, vegetable oils, lubricants such as magnesium stearate and talc, hydroxypropyl cellulose, polyvinyl.
- a binder such as pyrrolidone, a carboxymethylcellulose calcium, a disintegrating agent such as low-substituted hydroxypropylmethylcellulose, a coating agent such as hydroxypropylmethylcellulose, macrogol, or a silicone resin, a film forming agent such as a gelatin film, etc., It can be prepared.
- coating may be carried out, if necessary, for the purpose of taste masking, enteric coating or sustainability.
- the coating base include sugar coating bases, water-soluble film coating bases, enteric film coating bases, and sustained-release film coating bases.
- sucrose is used, and one or more selected from talc, precipitated calcium carbonate, gelatin, gum arabic, pullulan, carnauba wax and the like may be used in combination.
- water-soluble film coating base include cellulosic polymers such as hydroxypropylcellulose, hydroxypropylmethylcellulose, hydroxyethylcellulose, and methylhydroxyethylcellulose; polyvinyl acetal diethylaminoacetate, aminoalkylmethacrylate copolymer E [Eudragit E (trade name) ], Synthetic polymers such as polyvinylpyrrolidone; and polysaccharides such as pullulan.
- enteric film coating bases include cellulose-based polymers such as hydroxypropylmethylcellulose phthalate, hydroxypropylmethylcellulose acetate succinate, carboxymethylethylcellulose, and cellulose acetate phthalate; methacrylic acid copolymer L, methacrylic acid copolymer LD, Acrylic acid polymers such as methacrylic acid copolymer S; natural products such as shellac.
- examples of the sustained-release film coating base include cellulosic polymers such as ethyl cellulose; acrylic acid polymers such as aminoalkyl methacrylate copolymer RS and ethyl acrylate-methyl methacrylate copolymer suspension. .. Two or more kinds of coating bases may be appropriately mixed and used. Further, at the time of coating, for example, a light-shielding agent such as titanium oxide, iron sesquioxide, etc. may be added.
- the route of administration of the retinal ganglion cell death inhibitor of the present invention to a subject is not particularly limited, but parenteral administration is preferred, and specifically, ocular topical administration, injection administration, nasal administration, pulmonary administration, transdermal administration Examples include skin administration and transmucosal administration.
- Examples of the dosage form for topical administration to the eye include eye drops and eye ointments.
- Examples of injection administration include intravitreal injection, subconjunctival injection, subtenon injection, intravenous injection, intramuscular injection, intraperitoneal injection, and subcutaneous injection.
- the administration method can be appropriately selected depending on the age and symptoms of the subject (eg, patient).
- the dose of the retinal ganglion cell death inhibitor of the present invention may be an amount such that the BMPR signaling inhibitor, which is an active ingredient, is administered in an effective amount.
- the effective amount of the BMPR signal transduction inhibitor is appropriately determined depending on the purpose of use, administration route, etc., but is adjusted so as to bring about an optimal response (for example, therapeutic response) of interest.
- the dose of the active ingredient varies depending on the disease to be treated and the administration route, and cannot be generally stated.
- the concentration of the active ingredient in the target tissue that exerts the effect, that is, the retinal tissue is 0.01 ⁇ M to 1000 ⁇ M. , Preferably 0.1 ⁇ M to 100 ⁇ M, more preferably 1 ⁇ M to 10 ⁇ M.
- a drug containing the active ingredient in an amount of 0.001 to 20 w / v%, preferably 0.1 to 10 w / v%, more preferably 1 to 5 w / v% is used once.
- About 20 to about 50 ⁇ L may be administered 1 to 8 times a day, preferably 1 to 5 times.
- each dose is 0.01 ng to 100 mg, preferably 0.01 ng to 50 mg, more preferably 0.1 ng to 10 mg, and even more preferably 1 ⁇ g to 30 ⁇ g. May be administered once every 7 days to 2 months.
- the active ingredient when the active ingredient is orally administered to a subject, 10 ng to 1000 mg, preferably 100 ng to 500 mg, more preferably 1 mg to 200 mg of the active ingredient is given 1 to 6 times a day, preferably It may be given 1 to 3 times.
- the subject includes mammals (eg, humans, mice, rats, hamsters, rabbits, cats, dogs, cows, sheep, monkeys, etc.), preferably primates, and more preferably humans.
- mammals eg, humans, mice, rats, hamsters, rabbits, cats, dogs, cows, sheep, monkeys, etc.
- primates e.g., humans, mice, rats, hamsters, rabbits, cats, dogs, cows, sheep, monkeys, etc.
- retinal ganglion cell death is suppressed by administering an effective amount of a BMPR signaling inhibitor to a subject in need of suppression of retinal ganglion cell death.
- the administration route, dose, etc. of the BMPR signaling inhibitor are the same as those of the retinal ganglion cell death inhibitor.
- the BMPR signaling inhibitor may be formulated and administered with a pharmacologically acceptable carrier.
- the pharmacologically acceptable carrier and formulation are the same as those for the retinal ganglion cell death inhibitor.
- retinal ganglion cell death can be suppressed by the step of culturing retinal ganglion cells in the presence of an effective amount of a BMPR signaling inhibitor.
- the retinal ganglion cells may be isolated from a living body or cultured.
- the retinal ganglion cells may be a cell group or tissue containing retinal ganglion cells, and examples of the cell group or tissue include optic nerve cells, retinal nerve cells, retinal nerves, retinal tissue and the like.
- the BMPR signaling inhibitor can be present in the culture solution in an effective amount.
- the BMPR signal transduction inhibitor is used by being contained in the culture medium, 0.01 ⁇ M to 1000 ⁇ M, preferably 0.1 ⁇ M to 100 ⁇ M, more preferably 1 ⁇ M to 10 ⁇ M, and the BMPR signal transduction inhibitor is contained in the culture medium. You may use.
- the retinal ganglion cell death inhibitor of the present invention can be used as a retinal neuroprotective agent by suppressing cell death of retinal ganglion cells.
- the present invention also provides a retinal neuroprotective agent containing a BMPR signaling inhibitor.
- the present invention provides the step of: (a) administering an effective amount of a BMPR signaling inhibitor to a subject in need of retinal neuroprotection; or (b) in the presence of an effective amount of a BMPR signaling inhibitor.
- a method for protecting a retinal nerve comprising the step of culturing the retinal nerve.
- the present invention provides BMPR signaling inhibitors for use in the protection of retinal nerves.
- a neuroprotective drug for the retina exerts a neuroprotective effect on the retina by inhibiting the signal transduction from BMPR with the BMPR signal transduction inhibitor as an active ingredient.
- BMPR BMPR signal transduction inhibitor
- the neuroprotective agent of the present invention protects retinal nerve cells involved in transmission of electrical signals to the brain by a mechanism of action different from that of conventional neuroprotective agents (particularly suppresses cell death of retinal ganglion cells), Since it exerts a neuroprotective effect, it can be expected to be applied to eye diseases that have been conventionally difficult to treat, and excellent effects can be expected even in eye diseases for which conventional treatment methods have been known.
- neuroprotection of the retina not only means suppressing retinal nerve cell death and / or functional decline of retinal nerve cells caused by any cause, but also retinal nerve cell death that may occur in the future. And / or preventing functional decline of retinal nerve cells.
- the retinal neuroprotective agent of the present invention may contain a pharmacologically acceptable carrier in addition to the BMPR signal transduction inhibitor.
- a pharmacologically acceptable carrier are as described for the retinal ganglion cell death inhibitor.
- the neuroprotective agent of the present invention can be formulated according to a method known in the art, either alone or as a mixture with a pharmacologically acceptable carrier, a BMPR signaling inhibitor.
- a pharmacologically acceptable carrier such as a benzyl alcohol, benzyl ether, benzyl ether, benzyl ether, benzyl ether, benzyl ether, benzyl ether, a BMPR signaling inhibitor.
- Specific examples of the pharmacologically acceptable carrier, formulation, type of formulation, administration route, dose and the like are as described for the retinal ganglion cell death inhibitor.
- retinal nerves are protected by administering an effective amount of a BMPR signaling inhibitor to a subject in need of retinal neuroprotection.
- the administration route, dose, etc. of the BMPR signaling inhibitor are the same as those of the retinal ganglion cell death inhibitor.
- the BMPR signaling inhibitor may be formulated and administered with a pharmacologically acceptable carrier.
- the pharmacologically acceptable carrier and formulation are the same as those for the retinal ganglion cell death inhibitor.
- the step of culturing the retinal nerve in the presence of an effective amount of a BMPR signaling inhibitor can protect the retinal nerve.
- the retinal nerve may include retinal ganglion cells.
- the BMPR signaling inhibitor can be present in the culture solution in an effective amount.
- the BMPR signal transduction inhibitor is used by being contained in the culture medium, 0.01 ⁇ M to 1000 ⁇ M, preferably 0.1 ⁇ M to 100 ⁇ M, more preferably 1 ⁇ M to 10 ⁇ M, and the BMPR signal transduction inhibitor is contained in the culture medium. You may use.
- the retinal ganglion cell death inhibitor or retinal neuroprotective agent of the present invention is a pharmaceutical composition for preventing or treating diseases associated with retinal ganglion cell death. Can be used.
- the present invention also provides a drug for preventing or treating a disease associated with retinal ganglion cell death, which comprises a BMPR signaling inhibitor.
- the present invention provides a method for preventing or treating a disease associated with retinal ganglion cell death, which comprises the step of administering an effective amount of a BMPR signaling inhibitor to a subject in need of such prevention or treatment. ..
- the present invention provides a BMPR signaling inhibitor for use in preventing or treating a disease associated with retinal ganglion cell death.
- Diseases related to retinal ganglion cell death are diseases caused by cell death of retinal ganglion cells, or retinal ganglion cell death, or any disease whose pathological condition is retinal ganglion cell damage (especially eye diseases) ) Is included, for example, glaucoma, diabetic retinopathy, retinal vascular occlusion (including retinal artery occlusion or retinal vein occlusion), ischemic optic neuropathy, Leber's disease, diseases associated with choroidal neovascularization, retinitis pigmentosa. , Dominant hereditary optic atrophy, optic neuritis, aniridia and the like.
- Glaucoma Glaucoma is a progressive disease with characteristic changes in the optic nerve and visual field, and is thought to be one of the causes of retinal ganglion cell death.
- causes of retinal ganglion cell death include intracellular nutrient depletion (ischemia) due to elevated intraocular pressure, oxidative stress and the like. Therefore, retinal ganglion cell protection is useful in the treatment of glaucoma (Liu et al., Invest Ophthalmol Vis Sci. 2017 Oct 1; 58 (12): 5129-5141).
- Diabetic retinopathy is a retinal disorder that occurs as a complication of diabetes. As the hyperglycemic state continues due to diabetes, blood vessels in the retina are damaged or degenerated, resulting in ischemia or oxygen deficiency. In diabetic retinopathy, it is known that adverse factors such as hypoxia, excitotoxicity, and cell death of retinal ganglion cells induced by oxidative stress are involved in the onset (Xiao A et al., Exp Ther Med. 2017 Jun; 13 (6): 3360-3368).
- Ischemic optic neuropathy is a disease that causes circulatory disorders in the blood vessels that feed the optic nerve. Retinal ganglion cell death caused by retinal ischemia due to oxidative stress is a common pathology of ischemic optic neuropathy (Kapupara K et al., Cell Death Dis. 2017 Nov 16; 8 (11)).
- Retinal vascular occlusion is a disease in which blood vessels of the retina are clogged and blood flow to cells is interrupted, and includes retinal artery occlusion and retinal vein occlusion.
- the obstruction of blood flow (ischemia) causes nutrient depletion and oxygen deficiency of retinal cells, resulting in cell death.
- retinal ganglion cell death caused by retinal ischemia due to oxidative stress is a general pathology (Kapupara K et al., Supra).
- Labeler's disease (Labeler's hereditary optic neuropathy) is one of hereditary optic neuropathy, and is a disease whose cause is an abnormality of mitochondrial genes that generate energy. It is thought that the gene mutation leads to apoptosis of retinal ganglion cells, and it is predicted that oxidative stress is involved in the onset (Guy J, et al., Invest Ophthalmol Vis Sci. 2014 Feb 10; 55 (2): 841-8.).
- Dominant hereditary optic atrophy is one of hereditary optic neuropathy as well as Leber's disease. It is inherited in an autosomal dominant manner and is characterized by degeneration of retinal ganglion cells. This disease is considered to be associated with OPA1 gene mutation, and it has been reported that prevention of retinal ganglion cell loss by OPA1 gene transfer may be a therapeutic tool (Sarzi E, et al., Sci Rep. 2018 Feb 6; 8 (1): 2468).
- Optic neuritis is a disease that causes visual loss and visual field impairment due to inflammation in the optic nerve, resulting in loss of the optic nerve including apoptosis of retinal ganglion cells (Khan RS, Invest Ophthalmol Vis Sci. 2014 Aug 19; 55 (9 ): 5744-51).
- Aniridia is a condition in which the iris is not congenitally formed and is caused by an abnormality in the PAX6 gene. Aniridia often accompanies glaucoma, resulting in optic neuropathy including retinal ganglion cell apoptosis (W M Grant and D S Walton, Trans Am Ophthalmol Soc. 1974; 72: 207-228.).
- Retinitis pigmentosa The retina is a tissue that senses light, and when light hits the retina, an electrical signal is generated and the signal is transmitted to the brain through the optic nerve.
- Retinitis pigmentosa is a hereditary disease in which an abnormality is observed in the retina, and it is known as a symptom characterized by night blindness, visual field narrowing, and visual loss.
- Retinal neuroprotective agents are thought to be able to delay the progression of retinitis pigmentosa and are expected to be developed.
- Choroidal neovascularization refers to the ectopic growth of choroidal blood vessels, and bleeding from the immature vascular network and leakage of plasma components including fat cause rapid decline in retinal nerve function. It has been known. Examples of diseases associated with choroidal neovascularization include myopic choroidal neovascularization, idiopathic choroidal neovascularization, posterior uveitis, traumatic choroidal rupture, and retinal pigment striae. Myopic choroidal neovascularization is the most common cause of poor vision in people with pathological myopia.
- composition for preventing or treating diseases associated with retinal ganglion cell death (hereinafter referred to as "pharmaceutical composition of the present invention") ) Contains a BMPR signaling inhibitor as an active ingredient like the retinal ganglion cell death inhibitor, and prevents or treats diseases associated with retinal ganglion cell death by inhibiting BMPR signaling.
- the BMPR signal transduction inhibitor is preferably a type I receptor signal transduction inhibitor, more preferably an ALK3 signal transduction inhibitor.
- the pharmaceutical composition of the present invention may contain a pharmacologically acceptable carrier in addition to the BMPR signaling inhibitor.
- a pharmacologically acceptable carrier are as described for the retinal ganglion cell death inhibitor.
- the pharmaceutical composition of the present invention can be formulated according to a method known in the art by using the BMPR signaling inhibitor alone or in combination with a pharmacologically acceptable carrier.
- a pharmacologically acceptable carrier for example, a pharmacologically acceptable carrier, a pharmacologically acceptable carrier, type of formulation, administration route, dose and the like are as described for the retinal ganglion cell death inhibitor.
- the pharmaceutical composition according to the present invention can be used in combination with other pharmaceuticals.
- examples of the drug that can be used in combination include, for example, anti-glaucoma drug, anti-obesity agent, diabetes treatment agent, diabetic complication treatment agent, antihypertensive agent, diuretic agent, hyperlipidemia.
- examples include therapeutic agents, chemotherapeutic agents, immunotherapeutic agents, anti-inflammatory agents, antithrombotic agents, osteoporosis therapeutic agents, vitamin agents, anti-dementia agents, frequent urination or urinary incontinence therapeutic agents, and dysuria therapeutic agents.
- an effective amount of a BMPR signaling inhibitor is administered to a subject in need of prevention or treatment of a disease associated with retinal ganglion cell death, whereby To prevent or treat.
- the administration route, dose, etc. of the BMPR signaling inhibitor are the same as those of the retinal ganglion cell death inhibitor.
- the BMPR signaling inhibitor may be formulated and administered with a pharmacologically acceptable carrier.
- the pharmacologically acceptable carrier and formulation are the same as those for the retinal ganglion cell death inhibitor.
- the retinal ganglion cell death inhibitor of the present invention can be used as an adjunct for optic nerve cell transplant or an adjunct for regenerative medicine in the production and storage of regenerative medical materials and treatment using the materials. More specifically, the retinal ganglion cell death inhibitor of the present invention can be used by adding it to a medium in the process of manufacturing a regenerative medical material such as a cell preparation or a cell sheet or the process of maintaining before transplantation.
- the present invention comprises culturing optic nerve cells by adding an optic nerve cell transplant auxiliary agent or a regenerative medical auxiliary agent containing the retinal ganglion cell death inhibitor or the retinal neuroprotective agent of the present invention to a medium, A method for culturing optic nerve cells is also provided.
- the optic nerve cell transplant auxiliary agent or regenerative medical auxiliary agent of the present invention may be contained in a cell preparation.
- the present invention includes the cell preparation.
- the cell preparation may contain retinal ganglion cells such as optic nerve cells for transplantation.
- the cell may be a culture after culturing. Addition of the retinal ganglion cell death inhibitor of the present invention suppresses cell death of retinal ganglion cells and enables effective tissue regeneration.
- Optic nerve cell transplantation adjuvants or reproducing medical adjuvant of the invention can also contain a substance for promoting or assisting the contact of the affected area as needed,
- such materials such as Matrigel TM
- Matrigel TM examples thereof include extracellular matrix, collagen, fibronectin, vitronectin, retronectin, laminin, cadherin, integrin, selectin, and cell adhesion peptides represented by RGD peptide.
- the cell preparation of the present invention can be administered, for example, by formulating into a dosage form such as an injection or infusion and locally administering it into the retina.
- the form and shape of the above-mentioned cell preparation of the present invention is not particularly limited, and may be a cell sheet produced by layering retinal ganglion cells.
- a cell sheet having a cell layer formed by retinal ganglion cells in which axons are elongated and retaining cell-cell interaction can be mentioned.
- Such a cell sheet can be directly transplanted to an affected area as it is as a culture of retinal ganglion cells.
- a cell culture system in which oxidative stress is applied to retinal ganglion cells is considered to be a model of cell damage and is generally used to confirm the neuroprotective effect.
- menadione which is a type of vitamin K
- menadione can induce a model of damage caused by oxidative stress. Therefore, in the present example below, a model of cell damage was induced using menadione (InvestOphthalmol VisSci. 2006). Apr; 47 (4): 1477-85, J Neurochem.2010 Jul; 114 (2): 488-98 (doi: 10.1111 / j.1471-4159.2010.06781.x.), J Ophthalmol. 2017; 2017: 7598140 (Doi: 10.1155 / 2017/7598140)).
- Example 1 the neuroprotective effect was confirmed by specifically inhibiting BMPR (particularly ALK3) in retinal ganglion cells, thereby inhibiting signal transduction from BMPR, particularly signal transduction from ALK3.
- ALK4 belongs to the same ALK family as ALK3, but regulates signal transduction using Activin as a ligand, not the BMPR signaling system.
- Method (1) Isolation of rat retinal ganglion cells Retinas were taken out from 7-day-old SD rats (Japan SLC Co., Ltd., 13 animals), and the retinal cells were dispersed by Dissociation Kit-Postnatal Neurons (Miltenyi Biotech). Then, using Retinal Ganglion Cell Isolation Kits (Miltenyi Biotech), retinal ganglion cells (RGCs) were isolated from other photoreceptor cells.
- Retinal ganglion cells were suspended in a medium for RGC culture, 2 ⁇ 10 4 cells were seeded in a 96-well plate, and cultured at 37 ° C. under 5% CO 2 for 24 hours. After 24 hours, the medium was removed, and 6 ⁇ M menadione, Normal rabbit IgG (Santa Cruz), anti-ALK3 antibody (Anti-BMPR1A antibody, Abcam), and anti-ALK4 antibody (anti-Activin) were added to the menadione reaction medium according to each group composition described later.
- a Receptor Type IB antibody, Abcam), and ALK3 inhibitor K02288 (Tocris Bioscience) (PLOS ONE 2013 8 (4) e62721) were added, and the mixture was incubated at 37 ° C for 18 hours. After that, live cells and dead cells were stained using LIVE / DEAD Viability / Cytotoxicity Kit (Thermo Fisher), and each well was photographed and analyzed by the IncuCyte S3 live cell analysis system (Essen Bioscience). .. The data was calculated as the ratio of the number of living cells to the total number of cells, which is the total number of living and dead cells.
- the RGC culture medium and menadione reaction medium used are as follows.
- RGC culture medium NeuroBral-21 supplement (miltenyi biotech), 50ng / mL BDNF (miltenyi biotech), 50ng / mL CNTF (peprotech), 5 ⁇ M Forskolin (sigma), GlutaMAX TM (thermofisher), Primocin in Neurobasal medium (thermofisher) Medium supplemented with TM (Invivogen).
- Medium for menadione reaction A medium in which NeuroBrew-21 supplement (Miltenyi Biotech), GlutaMAX TM (Thermofisher), and Primocin TM (Invivogen) are added to the Neurobasal medium (Thermo Fisher).
- Control group without addition of menadione, addition of Normal rabbit IgG Normal IgG treatment group: addition of menadione and Normal rabbit IgG
- Anti-ALK3 antibody treatment group addition of menadione and anti-ALK3 antibody
- Anti-ALK4 antibody treatment group addition of menadione and anti-ALK4 antibody
- K02288 treatment group Menadione and K02288 added
- the anti-ALK3 antibody and ALK3 peptide, or the anti-ALK4 antibody and ALK4 peptide were premixed and reacted at 37 ° C. for 1 hour, and then the mixture after reaction was reacted with the PVDF membrane after protein transfer. Then, it was stained with an anti-rabbit HRP antibody (GE Healthcare) as a secondary antibody, and the staining result was photographed with ImageQuant LAS4000 (GE Healthcare).
- both the anti-ALK3 antibody and the anti-ALK4 antibody produced a dark band when alone, while the band became faint when each peptide was added to the antibody.
- the anti-ALK3 antibody used and the anti-ALK4 antibody respectively react with ALK3 and ALK4 in the retinal tissue, and the antigens ALK3 peptide and ALK4 in the retinal tissue are blocked by the ALK3 peptide, respectively. It was confirmed that it specifically binds to ALK3 and ALK4 (FIGS. 1A and 1B).
- the anti-ALK3 antibody used has specific reactivity with ALK3. Therefore, the cell death inhibitory effect of the anti-ALK3 antibody is considered to be ALK3-specific.
- Example 2 In Example 1, the neuroprotective effect of retinal ganglion cells by inhibiting the signal transduction from BMPR, particularly the signal transduction from ALK3 was confirmed. In this Example 2, the neuroprotective effect of retinal ganglion cells when a low molecular weight compound that is an ALK3 inhibitor was used was confirmed.
- Method (1) Isolation of rat retinal ganglion cells Rat retinal ganglion cells were isolated by the same method as in Example 1. Three rats were used for the K02288-treated experimental system (FIG. 2A), and two rats were used for the LDN-193189-treated experimental system (FIG. 2B).
- Retinal ganglion cells were suspended in an RGC culture medium, seeded in a 96-well plate at 1 x 10 4 cells, and cultured at 37 ° C under 5% CO 2 for 24 hours. After 24 hours, the medium was removed, and 6 ⁇ M menadione, ALK3 inhibitor K02288 (Tocris Bioscience), LDN-193189 (MedChemExpress) (PLOS ONE 2013 8 (4) e62721) was added to the menadione reaction medium according to the group composition. .. DMSO was added to the K02288 untreated group or the LDN-193189 untreated group (menadione alone treatment group). After incubating at 37 ° C.
- ALK3 inhibitor K02288 Tocris Bioscience
- LDN-193189 MedChemExpress
- Example 1 The same medium as used in Example 1 was used as the RGC culture medium and the menadione reaction medium.
- Example 3 This example was carried out for the purpose of confirming the expression of BMPR ligand in retinal ganglion cells and the expression of BMPR ligand in a cytotoxicity model. Further, in this example, the expression of the TGF ⁇ superfamily receptor bound to the BMPR ligand in retinal ganglion cells was also confirmed.
- Method (1) Isolation of rat retinal ganglion cells Rat retinal ganglion cells were isolated by the same method as in Example 1. 10 rats were used as an experimental system for confirming the expression of the TGF ⁇ superfamily receptor, and 30 rats were used as an experimental system for confirming the expression of the BMPR ligand.
- RNA extraction RNA was extracted using the RNeasy Mini Kit (Qiagen) according to the manual. After RNA extraction, reverse transcription was performed with Superscript II reverse transcriptase (Thermo Fisher) to prepare cDNA.
- TaqMan probe (receptor): ALK4, Bmpr2, Acvr2a, Acvr2b, ALK2, ALK3, ALK6, ALK7 TaqMan probe (ligand): Inhba, Tgfb2, Tgfb1, Gdf5, Bmp7, Bmp4, Bmp2, Gapdh
- BMP4 is particularly related to the cell death induction of retinal ganglion cells by menadione.
- Example 3 From Example 3, in the retinal ganglion cells under the oxidative stress of menadione, it was confirmed that the expression level of BMP4 was remarkably increased. Furthermore, it was confirmed from Example 1 that cell death due to oxidative stress is suppressed by specifically inhibiting the function of ALK3 by the extracellular recognition antibody of ALK3. In addition, in Examples 1 and 2, ALK3 inhibitors other than the antibodies also suppressed the cell death induced by oxidative stress. From the above, it was confirmed that inhibition of BMPR signal transduction, particularly ALK3 signal transduction has an important function in suppressing retinal ganglion cell death and may be a new target for the development of retinal neuroprotective drugs. It was
- the BMPR signaling inhibitor of the present invention is useful for treating diseases associated with retinal ganglion cell death such as glaucoma, diabetic retinopathy, and retinal vascular occlusion.
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Abstract
Description
本明細書は、本願の優先権の基礎である特願2018-204891号(2018年10月31日出願)の明細書に記載された内容を包含する
[技術分野]
本発明は、BMPR(BMP受容体)シグナル伝達阻害剤を利用した網膜神経節細胞死の抑制、及び網膜神経節細胞死に関連した疾患の予防又は治療に関する。
(1)BMPRシグナル伝達阻害剤を含む、網膜神経節細胞死抑制剤。
(2)BMPRシグナル伝達阻害剤がALK3シグナル伝達阻害剤である、(1)に記載の網膜神経節細胞死抑制剤。
(3)BMPRシグナル伝達阻害剤が、抗ALK3抗体又はそのフラグメント、抗BMP4抗体又はそのフラグメント、Dorsomorphin(6-[4-(2-ピペリジン-1-イルエトキシ)フェニル]-3-ピリジン-4-イルピラゾロ[1,5-a]ピリミジン)、LDN-193189(4-[6-(4-ピペラジン-1-イル-フェニル)-ピラゾロ[1,5-α]ピリミジン-3-イル]-キノリン)、2-(3-(6-メチルピリジン-2-イル)-1H-ピラゾール-4-イル)-1,5-ナフチリジン、K02288(3-[6-アミノ-5-(3,4,5-トリメトキシフェニル)-3-ピリジニル]-フェノール)、DMH-1(4-[6-[4-(1-メチルエトキシ)フェニル]ピラゾロ[1,5-α]ピリミジン-3-イル]-キノリン)、LDN-212854(5-(6-(4-(1-ピペラジニル)フェニル)ピラゾロ[1,5-α]ピリミジン-3-イル)キノリン)、LDN-214117 (1-[4-[6-メチル-5-(3,4,5-トリメトキシフェニル)-3-ピリジニル]フェニル]ピペラジン)、及びML347(5-[6-(4-メトキシフェニル)ピラゾロ[1,5-a]ピリミジン-3-イル]キノリン)からなる群から選ばれるいずれかである、(1)に記載の網膜神経節細胞死抑制剤。
(4)フラグメントが、標的抗原を特異的に認識し結合するための相補性決定領域(CDR)を有するフラグメント、例えば、Fab、F(ab')2、Fv、scFv、scFv-Fc、ミニボディー、及びダイアボディーからなる群から選ばれるいずれかである、(3)に記載の網膜神経節細胞死抑制剤。
(5)(1)~(4)のいずれかの項に記載の網膜神経節細胞死抑制剤を含む、網膜神経保護薬。
(6)(1)~(4)のいずれかの項に記載の網膜神経節細胞死抑制剤を含む、網膜神経節細胞死が関連する疾患を予防又は治療するための医薬組成物。
(7)網膜神経節細胞死が関連する疾患が、緑内障、糖尿病性網膜症、網膜血管閉塞症、虚血性視神経症、脈絡膜血管新生を伴う疾患、レーベル病、優性遺伝性視神経萎縮症、視神経炎、及び無虹彩症からなる群から選ばれるいずれか1又は2以上である、(6)に記載の医薬組成物。
(8)(1)~(4)のいずれかの項に記載の網膜神経節細胞死抑制剤を含む、視神経細胞移植用補助剤。
(9)(1)~(4)のいずれかの項に記載の網膜神経節細胞死抑制剤の存在下で、視神経細胞(例えば、移植用の視神経細胞)を培養することを含む、視神経細胞の培養方法。
(10)網膜神経節細胞死を抑制する方法であって、以下の(a)又は(b)の工程を含む方法:
(a)有効量のBMPRシグナル伝達阻害剤を、該抑制を必要とする被験体に投与する工程;又は、
(b)有効量のBMPRシグナル伝達阻害剤の存在下で、網膜神経節細胞を培養する工程。
(11)BMPRシグナル伝達阻害剤が、(2)~(4)のいずれかの項又は複数の項に記載される特徴をさらに備える、(10)に記載の方法。
(12)網膜神経を保護する方法であって、以下の(a)又は(b)の工程を含む方法:
(a)有効量のBMPRシグナル伝達阻害剤を、該保護を必要とする被験体に投与する工程;又は、
(b)有効量のBMPRシグナル伝達阻害剤の存在下で、網膜神経を培養する工程。
(13)BMPRシグナル伝達阻害剤が、(2)~(4)のいずれかの項又は複数の項に記載される特徴をさらに備える、(12)に記載の方法。
(14)網膜神経節細胞死が関連する疾患を予防又は治療するための方法であって、有効量のBMPRシグナル伝達阻害剤を、該予防又は治療を必要とする被験体に投与する工程を含む、方法。
(15)BMPRシグナル伝達阻害剤が、(2)~(4)のいずれかの項又は複数の項に記載される特徴をさらに備える、(14)に記載の方法。
(16)網膜神経節細胞死が関連する疾患が、(7)に記載の疾患である、(14)又は(15)に記載の方法。
(17)網膜神経節細胞死の抑制に使用するための、BMPRシグナル伝達阻害剤。
(18)BMPRシグナル伝達阻害剤が、(2)~(4)のいずれかの項又は複数の項に記載される特徴をさらに備える、(17)に記載の阻害剤。
(19)網膜神経の保護に使用するための、(17)又は(18)に記載の阻害剤。
(20)網膜神経節細胞死が関連する疾患の予防又は治療に使用するための、(17)~(19)のいずれかの項に記載の阻害剤。
(21)網膜神経節細胞死が関連する疾患が、(7)に記載の特徴をさらに備える、(20)に記載の阻害剤。
本発明にかかるBMPRシグナル伝達阻害剤とは、BMPとBMPRの相互作用を介したBMPRシグナル伝達を阻害する物質である。BMPRシグナル伝達阻害剤は、BMPのシグナル伝達阻害剤としての機能を有するものであってもよい。
(1)BMPRへのBMPの結合を阻止又は阻害する物質:例えば、BMPRアンタゴニストやアンタゴニスト抗体(中和抗体)、抗BMPR抗体、BMPアンタゴニストやアンタゴニスト抗体(中和抗体)、抗BMP抗体、ドミナントネガティブ型BMP、ドミナントネガティブ型BMPR;
(2)BMPやBMPRの発現を抑制する物質:例えば、BMPやBMPR遺伝子の転写を阻害する物質、初期転写産物からmRNAへのプロセッシングを阻害する物質、mRNAの細胞質への輸送を阻害する物質、mRNAの分解を促進する物質、mRNAからタンパク質への翻訳を阻害する物質、タンパク質の翻訳後修飾を阻害する物質、好ましくは、BMP又はBMPRのmRNAに対するアンチセンス核酸やsmall interfering RNA(siRNA);
(3)細胞内シグナル伝達を阻止又は阻害する物質:例えば、SMAD1/5/8経路の阻害剤、各SMAD分子のドミナントネガティブ型、SMAD4の核移行を阻害する阻害的SMAD、非SMAD経路の阻害剤;非SMAD経路の分子(例えば、Tak1、Tab1など)の阻害剤;
(4)細胞内シグナル伝達にかかわる分子の発現を抑制する物質:例えば、各SMAD遺伝子やTak1、Tab1遺伝子の転写を阻害する物質、初期転写産物からmRNAへのプロセッシングを阻害する物質、mRNAの細胞質への輸送を阻害する物質、mRNAの分解を促進する物質、mRNAからタンパク質への翻訳を阻害する物質、タンパク質の翻訳後修飾を阻害する物質、好ましくは、各SMAD分子やTak1、Tab1分子のmRNAに対するアンチセンス核酸やsiRNA;
を挙げることができるが、これらに限定されない。
ALK3(Activin Receptor-like Kinase 3)は、別名:BMP受容体1A(BMPR1A)と言う。ALK3(BMPR1A)は、BMPファミリーのI型受容体の1つであり、同じI型受容体のBMPR1B及びII型受容体のBMPR2とヘテロ四量体を形成し、リガンドと結合することで、細胞内へのシグナル伝達を可能にする。
本発明において、BMPRシグナル伝達阻害剤として使用される抗体は、ポリクローナル抗体、モノクローナル抗体のいずれであってもよいが、モノクローナル抗体であることが好ましい。これらの抗体は、当該分野で公知の方法に従って製造することができる。抗体のアイソタイプは特に限定されないが、好ましくはIgG、IgM又はIgA、特に好ましくはIgGが挙げられる。また、抗体は、標的抗原を特異的に認識し結合するための相補性決定領域(CDR)を少なくとも有するものであれば特に制限はなく、完全抗体分子のほか、Fab、Fab'、F(ab’)2等のフラグメント、scFv、scFv-Fc、ミニボディー、ダイアボディー等の遺伝子工学的に作製されたコンジュゲート分子、あるいはポリエチレングリコール(PEG)等のタンパク質安定化作用を有する分子等で修飾されたそれらの誘導体などであってもよい。本明細書において、「抗体」にはPEG化抗体などの誘導体を含み、抗体の「フラグメント」には、scFv、scFv-Fc、ミニボディー、ダイアボディー等のコンジュゲート分子も含むものとする。
BMPRシグナル伝達阻害剤として使用されるドミナントネガティブは、正常タンパクの変異型で、正常タンパクよりも優位に機能して、正常タンパクの作用を阻害することでBMPシグナル伝達を阻害する変異型タンパクである。
BMPRシグナル伝達阻害剤として使用されるアンチセンス核酸(本発明のアンチセンス核酸)とは、BMPRシグナル伝達に係る分子のmRNAの塩基配列と相補的もしくは実質的に相補的な塩基配列又はその一部を含む核酸であって、標的mRNAと特異的かつ安定した二重鎖を形成して結合することにより、タンパク質合成を抑制する機能を有するものである。アンチセンス核酸は、二本鎖DNA、一本鎖DNA、二本鎖RNA、一本鎖RNA、DNA:RNAハイブリッドのいずれであってもよい。
siRNAは、標的分子のmRNAに相補的なオリゴRNAとその相補鎖とからなる二本鎖RNAであり、標的分子のmRNAの塩基配列情報に基づいて、当該分野で公知の方法にしたがい合成することができる。具体的には、mRNA上の標的配列のセンス鎖及びアンチセンス鎖をDNA/RNA自動合成機でそれぞれ合成し、適当なアニーリング緩衝液中、約90~約95℃で約1分程度変性させた後、約30~約70℃で約1~約8時間アニーリングさせることにより調製することができる。また、siRNAの前駆体となるショートヘアピンRNA(shRNA)を合成し、これをダイサー(dicer)を用いて切断することにより調製することもできる。
本発明は、BMPRシグナル伝達阻害剤を含む、網膜神経節細胞死抑制剤を提供する。本発明はまた、(a)有効量のBMPRシグナル伝達阻害剤を、該抑制を必要とする被験体に投与する工程;又は、(b)有効量のBMPRシグナル伝達阻害剤の存在下で、網膜神経節細胞を培養する工程を含む、網膜神経節細胞死を抑制する方法を提供する。あるいは、本発明は、網膜神経節細胞死の抑制に使用するための、BMPRシグナル伝達阻害剤を提供する。
本発明の網膜神経節細胞死抑制剤は、網膜神経節細胞の細胞死を抑制することで、網膜の神経保護薬として利用できる。また本発明は、BMPRシグナル伝達阻害剤を含む、網膜神経保護薬を提供する。さらに本発明は、(a)有効量のBMPRシグナル伝達阻害剤を、該網膜神経保護を必要とする被験体に投与する工程;又は、(b)有効量のBMPRシグナル伝達阻害剤の存在下で、網膜神経を培養する工程を含む、網膜神経を保護する方法を提供する。あるいは、本発明は、網膜神経の保護に使用するための、BMPRシグナル伝達阻害剤を提供する。
本発明の網膜神経節細胞死阻害剤や網膜神経保護薬は、網膜神経節細胞死が関連する疾患を予防又は治療するための医薬組成物に利用することができる。また本発明は、BMPRシグナル伝達阻害剤を含む、網膜神経節細胞死が関連する疾患を予防又は治療するための薬剤を提供する。さらに本発明は、有効量のBMPRシグナル伝達阻害剤を、該予防又は治療を必要とする被験体に投与する工程を含む、網膜神経節細胞死が関連する疾患を予防又は治療する方法を提供する。あるいは、本発明は、網膜神経節細胞死が関連する疾患を予防又は治療に使用するための、BMPRシグナル伝達阻害剤を提供する。
緑内障は、視神経と視野に特徴的変化を伴う進行性の疾患で、網膜神経節細胞死が原因のひとつと考えられている。網膜神経節細胞死の原因としては眼圧の上昇による細胞内での栄養枯渇(虚血)や酸化ストレス等が挙げられる。そのため、網膜神経節細胞保護は、緑内障の治療に有用である(Liu et al., Invest Ophthalmol Vis Sci. 2017 Oct 1;58(12):5129-5141)。
糖尿病性網膜症は、糖尿病の合併症として生じる網膜障害である。糖尿病により高血糖状態が続くことで、網膜の血管が損傷や変性を受け、虚血や酸欠状態に陥る。糖尿病性網膜症では、低酸素症、興奮毒性及び酸化的ストレス誘発網膜神経節細胞の細胞死などの有害要因が発症に関与することが知られている(Xiao A et al., Exp Ther Med. 2017 Jun;13(6):3360-3368)。
虚血性視神経症は、視神経の栄養を与える血管に循環障害を生じる疾患である。酸化ストレスによる網膜虚血がもたらす網膜神経節細胞死が虚血性視神経症の一般的な病理である(Kapupara K et al., Cell Death Dis. 2017 Nov 16;8(11))。
網膜血管閉塞は、網膜の血管が詰まり、細胞への血流が途絶えてしまう疾患であり、網膜動脈閉塞症と網膜静脈閉塞症を含む。血流の閉塞(虚血)により、網膜細胞の栄養枯渇と酸欠を生じ、細胞死をもたらす。膜血管(動脈又は静脈)閉塞においても、酸化ストレスによる網膜虚血がもたらす網膜神経節細胞死が一般的病理である(前掲Kapupara K et al.)。
レーベル病(レーベル遺伝性視神経症)は、遺伝性視神経症の一つであり、エネルギー産生を行うミトコンドリアの遺伝子の異常を病因とする疾患である。遺伝子変異により、網膜神経節細胞のアポトーシスに至ると考えられており、発症には酸化ストレスが関与していると予想されている(Guy J, et al., Invest Ophthalmol Vis Sci. 2014 Feb 10;55(2):841-8.)。
優性遺伝性視神経萎縮症は、レーベル病と同様に遺伝性視神経症の一つである。常染色体優性形式で遺伝し、網膜神経節細胞の変性を病態とする。本疾患にはOPA1遺伝子変異が関連すると考えられており、OPA1遺伝子導入による網膜神経節細胞の喪失予防が治療手段となり得ることが報告されている(Sarzi E, et al., Sci Rep. 2018 Feb 6;8(1):2468)。
視神経炎は、視神経におこる炎症によって、視力低下や視野障害をきたす疾患であり、網膜神経節細胞のアポトーシスを含む視神経の喪失が生じる(Khan RS, Invest Ophthalmol Vis Sci. 2014 Aug 19;55(9):5744-51)。
無虹彩症は虹彩が先天的に形成されない状態であり、PAX6遺伝子の異常が原因である。無虹彩症では、しばしば緑内障の合併を伴うため、網膜神経節細胞のアポトーシスを含む視神経障害が生じる(W M Grant and D S Walton, Trans Am Ophthalmol Soc. 1974; 72: 207-228.)
網膜は光を感じる組織であり、網膜に光が当たると電気的な信号が生じて、視神経を通して、信号が脳に伝達される。網膜色素変性は、網膜に異常がみられる遺伝性の病気であり、夜盲、視野狭窄、視力低下が特徴的な症状として知られている。網膜神経保護薬は網膜色素変性症の進行を遅らせることができると考えられ、開発が期待されている。
脈絡膜血管新生とは、脈絡膜の血管が異所性に増殖することをいい、未熟な血管網からの出血や脂肪を含んだ血漿成分の漏出が網膜神経の機能を急速に低下させる原因となることが知られている。脈絡膜血管新生を伴う疾患としては、近視性脈絡膜血管新生、特発性脈絡膜血管新生、後眼部ぶどう膜炎、外傷性脈絡膜破裂、網膜色素線条等が挙げられる。近視性脈絡膜血管新生は、病的近視を有する人の視力低下原因として最も多い疾患である。
網膜神経節細胞死が関連する疾患を予防又は治療するための医薬組成物(以下、「本発明の医薬組成物」という)は、網膜神経節細胞死抑制剤と同様に、BMPRシグナル伝達阻害剤を有効成分として含み、BMPRシグナル伝達を阻害することで網膜神経節細胞死に関連した疾患を予防又は治療する。BMPRシグナル伝達阻害剤は、好ましくはI型受容体シグナル伝達阻害剤であり、より好ましくはALK3シグナル伝達阻害剤である。
近年眼疾患の治療においても再生医療が注目されている。例えば、視神経又は網膜神経節細胞から作製された再生医療材料により、眼疾患を治療することが検討されている。本発明の網膜神経節細胞死抑制剤は、再生医療材料の製造や保管、当該材料を用いた治療における視神経細胞移植用補助剤あるいは再生医療用補助剤として用いることができる。より詳細には、本発明の網膜神経節細胞死抑制剤を、細胞製剤または細胞シート等の再生医療材料の製造工程や移植前の維持工程において、培地に添加して用いることができる。本発明は、本発明の網膜神経節細胞死抑制剤又は網膜の神経保護薬を含む視神経細胞移植用補助剤あるいは再生医療用補助剤を培地に添加して、視神経細胞を培養することを含む、視神経細胞の培養方法も提供する。
本実施例では、網膜神経節細胞においてBMPR(特にALK3)を特異的に阻害することにより、BMPRからのシグナル伝達、特にALK3からのシグナル伝達を阻害することによる神経保護効果を確認した。また陰性対照として、ALK4を特異的に阻害した場合の神経保護効果を確認した。ALK4は、ALK3と同じALKファミリーに属するが、BMPRシグナル伝達系ではなく、Activinをリガンドとしてシグナル伝達を制御するものである。
(1)ラット網膜神経節細胞の単離
7日齢 SDラット(日本SLC株式会社、13匹)から網膜を取り出し、Dissociation Kit-Postnatal Neurons(ミルテニーバイオテク)によって網膜細胞を分散した。その後、Retinal Ganglion Cell Isolation Kits(ミルテニーバイオテク)を使用し、他の視細胞から網膜神経節細胞(RGC)を単離した。
網膜神経節細胞をRGC培養用培地に懸濁し、96ウェルプレートに2 x 104 cell播種し、37℃、5% CO2下で24時間培養した。24時間後培地を取り除き、メナジオン反応用培地に、後述するそれぞれの群構成に合わせて6μMメナジオン、Normal rabbit IgG(サンタクルズ)、抗ALK3抗体(Anti-BMPR1A antibody、アブカム)、抗ALK4抗体(抗Activin A Receptor Type IB抗体、アブカム)、ALK3阻害剤のK02288(Tocris Bioscience)(PLOS ONE 2013 8(4) e62721)をそれぞれ添加し、37℃で18時間インキュベートした。その後、LIVE/DEAD Viability/Cytotoxicity Kit(サーモフィッシャー)を用いて生細胞と死細胞を染色し、IncuCyte S3 生細胞解析システム(エッセンバイオサイエンス)によって1ウェル3枚ずつ写真を取得し解析を行った。データは生細胞数と死細胞数を合わせた全細胞数に対する生細胞数の割合で算出した。なお、使用したRGC培養用培地とメナジオン反応用培地は以下の通りである。
Neurobasal medium(サーモフィッシャー)に、NeuroBrew-21 supplement(ミルテニーバイオテク)、50ng/mL BDNF(ミルテニーバイオテク)、50ng/mL CNTF(ペプロテック)、5μM Forskolin(シグマ)、GlutaMAXTM(サーモフィッシャー)、PrimocinTM(インビボジェン)を添加した培地。
Neurobasal medium(サーモフィッシャー)にNeuroBrew-21 supplement(ミルテニーバイオテク)、GlutaMAXTM(サーモフィッシャー)、及びPrimocinTM(インビボジェン)を添加した培地。
対照群:メナジオン添加なし、Normal rabbit IgG添加
Normal IgG処理群:メナジオン及びNormal rabbit IgG添加
抗ALK3抗体処理群:メナジオン及び抗ALK3抗体添加
抗ALK4抗体処理群:メナジオン及び抗ALK4抗体添加
K02288処理群:メナジオン及びK02288添加
7日齢 SDラット(日本SLC株式会社、1匹)から網膜を取り出し、Subcellular Protein Fractionation Kit (サーモフィッシャー)を用いて膜画分を抽出した。その後PNGase F(ニューイングランドバイオラボ)処理にて糖鎖を切断して得たサンプルをウエスタンブロットに供した。タンパク質が等量となるように、サンプルをSDS-PAGEにアプライした。SDS-PAGEにて分離したタンパク質をPVDF膜に転写後、抗ALK3抗体のみ、抗ALK3抗体及び抗ALK3抗体の2倍量のALK3(BMPR1A)ペプチド(アブノバ)、抗ALK4抗体のみ、又は抗ALK4抗体及び抗ALK4抗体の2倍量のALK4(ACVR1B)ペプチド(アブノバ)で反応させた。抗ALK3抗体とALK3ペプチド、又は抗ALK4抗体とALK4ペプチドは、予め混合して、37℃で1時間反応させた後、反応後の混合物をタンパク質転写後のPVDF膜と反応させた。その後、2次抗体として抗rabbit HRP抗体(GEヘルスケア)で染色し、ImageQuant LAS4000 (GEヘルスケア)で染色結果を撮影した。
メナジオン処理によってNormal IgG群では有意に細胞死が起こっていたが、抗ALK3抗体群及びALK阻害剤であるK02288では細胞死が有意に抑制された。一方、同じTGFβスーパーファミリー受容体であるALK4に対する抗ALK4抗体では細胞死は抑制されなかった(図1C)。
実施例1において、BMPRからのシグナル伝達、特にALK3からのシグナル伝達を阻害することによる網膜神経節細胞の神経保護効果が確認された。本実施例2では、ALK3阻害剤である低分子化合物を用いた場合の網膜神経節細胞の神経保護効果を確認した。
(1)ラット網膜神経節細胞の単離
実施例1と同様の方法でラット網膜神経節細胞を単離した。K02288処理の実験系(図2A)にはラット3匹、LDN-193189処理の実験系(図2B)にはラット2匹を用いた。
網膜神経節細胞をRGC培養用培地に懸濁し、96ウェルプレートに1 x 104 cell播種し、37℃、5% CO2下で24時間培養した。24時間後培地を取り除き、メナジオン反応用培地に群構成に合わせて6μMメナジオン、ALK3阻害剤であるK02288(Tocris Bioscience)、LDN-193189(MedChemExpress)(PLOS ONE 2013 8(4) e62721)を添加した。K02288無処置群又はLDN-193189無処置群にはDMSOを添加した(メナジオン単独処理群)。37℃で18時間インキュベート後、LIVE/DEAD Viability/Cytotoxicity Kit(サーモフィッシャー)により染色し、IncuCyte S3 生細胞解析システム(エッセンバイオサイエンス)によって1ウェル3枚ずつ写真を取得し解析を行った。データは生細胞数と死細胞数を合わせた全細胞数に対する生細胞数の割合をメナジオン単独処理群に対する比で算出した。RGC培養用培地とメナジオン反応用培地は、実施例1で使用した培地と同じものを使用した。
対照群:メナジオン添加なし
メナジオン単独処理群:メナジオン及びDMSO添加
K02288処理群(100nM, 1μM, 10μMの3群):メナジオン及びK02288添加
LDN-193189処理群(100nM, 1μMの2群):メナジオン及びLDN-193189添加
1μM及び10μM K02288処理群はメナジオン単独処理群に対し有意に細胞死抑制効果を示した。また1μM LDN-193189処理群もメナジオン単独処理群に対し有意に細胞死抑制効果を示した(図2A及び2B)。またK02288もLDN-193189も用量依存的な細胞死抑制効果を示した。メナジオンにより誘導される網膜神経節細胞死に対して、BMPR阻害剤(K002288、LDN-193189)が細胞保護効果を示すことが確認された。
本実施例は、網膜神経節細胞におけるBMPRリガンドの発現を確認すること、及び細胞障害モデルにおけるBMPRリガンドの発現を確認することを目的として行った。また本実施例では、網膜神経節細胞におけるBMPRリガンドが結合する、TGFβスーパーファミリーの受容体の発現の確認も行った。
(1)ラット網膜神経節細胞の単離
実施例1と同様の方法でラット網膜神経節細胞を単離した。なお、TGFβスーパーファミリーの受容体の発現確認の実験系には、ラット10匹、BMPRリガンドの発現確認の実験系には、ラット30匹を使用した。
網膜神経節細胞をRGC培養用培地に懸濁し、6ウェルプレートに2.83 x 105 cell播種し、24時間37℃、5% CO2下で培養した。24時間後培地を取り除き、メナジオン反応用培地に6μMメナジオンを入れたものに入れ替えて37℃で0時間又は6時間インキュベートした(n=2)。インキュベート後培地を取り除き、細胞を1mL のTrizol reagentに溶解しRNA抽出に供した。RGC培養用培地とメナジオン反応用培地は、実施例1で使用した培地と同じものを使用した。
RNeasy Mini Kit(キアゲン)をマニュアルに従って使用し、RNAを抽出した。RNA抽出後、Superscript II逆転写酵素(サーモフィッシャー)により逆転写を行い、cDNAを作製した。
cDNAに各TaqMan probeとTaqMan Master Mixを混合し、7500 PCR systems(アプライドバイオシステムズ)を用いてqPCR解析を実施した。各ターゲット毎に検量線を引いてコピー数を求め、GAPDHの測定値により補正して発現量を算出した。リガンドに関しては、メナジオン処理0時間のコピー数に対する、メナジオン処理6時間後のコピー数の割合を算出した。同じ実験を2度行い、再現性を確認した。
TaqMan probe(受容体):ALK4、Bmpr2、Acvr2a、Acvr2b、ALK2、ALK3、ALK6、ALK7
TaqMan probe(リガンド):Inhba, Tgfb2, Tgfb1, Gdf5, Bmp7, Bmp4, Bmp2, Gapdh
メナジオン未添加状態での網膜神経節細胞では各種TGFβスーパーファミリー受容体のmRNAの発現が確認された(図3)。
実施例3より、メナジオンによる酸化ストレス下の網膜神経節細胞では、特にBMP4の発現量に顕著な増加が確認された。さらに実施例1により、ALK3の細胞外認識抗体によってALK3の機能を特異的に阻害することにより、酸化ストレスによる細胞死が抑制されることが確認された。また実施例1及び2により、抗体以外のALK3阻害剤によっても酸化ストレスによる誘導細胞死が抑制された。以上のことから、BMPRからのシグナル伝達、特にALK3からのシグナル伝達の阻害は網膜神経節細胞死の抑制に重要な機能を有し、網膜神経保護薬開発の新たな標的となりうることが確認された。
Claims (9)
- BMPRシグナル伝達阻害剤を含む、網膜神経節細胞死抑制剤。
- BMPRシグナル伝達阻害剤がALK3シグナル伝達阻害剤である、請求項1に記載の網膜神経節細胞死抑制剤。
- BMPRシグナル伝達阻害剤が、抗ALK3抗体又はそのフラグメント、抗BMP4抗体又はそのフラグメント、Dorsomorphin(6-[4-(2-ピペリジン-1-イルエトキシ)フェニル]-3-ピリジン-4-イルピラゾロ[1,5-a]ピリミジン)、LDN-193189(4-[6-(4-ピペラジン-1-イル-フェニル)-ピラゾロ[1,5-α]ピリミジン-3-イル]-キノリン)、2-(3-(6-メチルピリジン-2-イル)-1H-ピラゾール-4-イル)-1,5-ナフチリジン、K02288(3-[6-アミノ-5-(3,4,5-トリメトキシフェニル)-3-ピリジニル]-フェノール)、DMH-1(4-[6-[4-(1-メチルエトキシ)フェニル]ピラゾロ[1,5-α]ピリミジン-3-イル]-キノリン)、LDN-212854(5-(6-(4-(1-ピペラジニル)フェニル)ピラゾロ[1,5-α]ピリミジン-3-イル)キノリン)、LDN-214117 (1-[4-[6-メチル-5-(3,4,5-トリメトキシフェニル)-3-ピリジニル]フェニル]ピペラジン)、及びML347(5-[6-(4-メトキシフェニル)ピラゾロ[1,5-a]ピリミジン-3-イル]キノリン)からなる群から選ばれるいずれかである、請求項1に記載の網膜神経節細胞死抑制剤。
- フラグメントが、Fab、F(ab')2、Fv、scFv、scFv-Fc、ミニボディー、及びダイアボディーからなる群から選ばれるいずれかである、請求項3に記載の網膜神経節細胞死抑制剤。
- 請求項1~4のいずれか1項に記載の網膜神経節細胞死抑制剤を含む、網膜神経保護薬。
- 請求項1~4のいずれか1項に記載の網膜神経節細胞死抑制剤を含む、網膜神経節細胞死が関連する疾患を予防又は治療するための医薬組成物。
- 網膜神経節細胞死が関連する疾患が、緑内障、糖尿病性網膜症、網膜血管閉塞症、虚血性視神経症、脈絡膜血管新生を伴う疾患、レーベル病、優性遺伝性視神経萎縮症、視神経炎、及び無虹彩症からなる群から選ばれるいずれか1又は2以上である、請求項6に記載の医薬組成物。
- 請求項1~4のいずれか1項に記載の網膜神経節細胞死抑制剤を含む、視神経細胞移植用補助剤。
- 請求項1~4のいずれか1項に記載の網膜神経節細胞死抑制剤の存在下で、視神経細胞を培養することを含む、視神経細胞の培養方法。
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Cited By (1)
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| US12172957B2 (en) | 2018-11-13 | 2024-12-24 | Ecología Y Protección Agricola, S.L. | Attractant composition for the species Delottococcus aberiae, methods for the monitoring, detection and/or control of the pest |
Also Published As
| Publication number | Publication date |
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| EP3875117A4 (en) | 2022-11-09 |
| US20210346386A1 (en) | 2021-11-11 |
| JP7541924B2 (ja) | 2024-08-29 |
| US12427147B2 (en) | 2025-09-30 |
| EP3875117A1 (en) | 2021-09-08 |
| JPWO2020090705A1 (ja) | 2021-09-24 |
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