WO2006068133A1 - Nfat2発現抑制方法 - Google Patents
Nfat2発現抑制方法 Download PDFInfo
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- WO2006068133A1 WO2006068133A1 PCT/JP2005/023356 JP2005023356W WO2006068133A1 WO 2006068133 A1 WO2006068133 A1 WO 2006068133A1 JP 2005023356 W JP2005023356 W JP 2005023356W WO 2006068133 A1 WO2006068133 A1 WO 2006068133A1
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- Prior art keywords
- serine
- nfat2
- cells
- expression
- glycine
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Classifications
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- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
- G01N33/5008—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics
- G01N33/502—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics for testing non-proliferative effects
- G01N33/5041—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics for testing non-proliferative effects involving analysis of members of signalling pathways
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/185—Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
- A61K31/19—Carboxylic acids, e.g. valproic acid
- A61K31/195—Carboxylic acids, e.g. valproic acid having an amino group
- A61K31/197—Carboxylic acids, e.g. valproic acid having an amino group the amino and the carboxyl groups being attached to the same acyclic carbon chain, e.g. gamma-aminobutyric acid [GABA], beta-alanine, epsilon-aminocaproic acid or pantothenic acid
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- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P19/00—Drugs for skeletal disorders
- A61P19/08—Drugs for skeletal disorders for bone diseases, e.g. rachitism, Paget's disease
- A61P19/10—Drugs for skeletal disorders for bone diseases, e.g. rachitism, Paget's disease for osteoporosis
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- A—HUMAN NECESSITIES
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- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
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- G—PHYSICS
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- G01N2800/10—Musculoskeletal or connective tissue disorders
- G01N2800/108—Osteoporosis
Definitions
- the present invention relates to a method for suppressing the expression of NFAT2, which is a transcription factor in the osteoclast differentiation process. More specifically, a method for suppressing the expression of NFAT2 by suppressing the signal transduction pathway of L-serine and Z or L-glycine, and further, the prevention and Z or treatment of NFAT2-related diseases by controlling the expression of NFAT2. It relates to drugs and their screening methods.
- Bone tissue performs bone remodeling (remodeling) by repeating bone formation by osteoblasts and bone resorption by osteoclasts.
- osteoporosis or “rheumatoid arthritis” develops, bone resorption exceeds bone formation, resulting in a decrease in bone mass.
- “Daishi bone disease” is a pathological condition caused by bone resorption failure, and there is an abnormality in osteoclast differentiation and there is no osteoclast in bone tissue or there is an abnormality in osteoclast function. If it is not possible to resorb bone, it is thought to occur in some cases.
- osteoporosis is caused by the loss of the balance between bone resorption and bone regeneration and increased formation of osteoclasts responsible for osteolysis.
- this mature osteoclast is a multinucleated cell, it is known that the NFAT2 (NFATcl) gene is essential in the process of cell fusion! / ⁇ (See Patent Document 1.)
- NFAT2 NFATcl
- Examples of techniques for controlling osteoclast formation using such signal transmission include methods for promoting or suppressing Ca 2+ signaling (see Patent Document 1) and methods including a step for promoting or inhibiting IFN signaling. (See Patent Documents 2 and 3).
- these methods need to be administered locally because they control Ca 2+ signaling, or have problems such as antigenicity and inability to be administered orally because they are administered proteins. Therefore, development of a new screening method based on a new mechanism has been demanded.
- Patent Document 1 Japanese Unexamined Patent Application Publication No. 2004-154132
- Patent Document 2 Pamphlet of International Publication No. 2002Z024228
- Patent Document 3 International Publication No. 2002Z024229 Pamphlet
- the present invention relates to a preventive or therapeutic agent for NFAT2-related diseases such as osteoporosis based on a novel mechanism, a method for preventing or treating NFAT2-related diseases such as osteoporosis, and prevention or treatment of NFAT2-related diseases such as osteoporosis. It aims to provide a screening method for therapeutic drugs.
- osteoclast progenitor cells receive signals from RANKL and express various genes responsible for the progression of differentiation.
- the inventor has independently discovered the gene expression by microarray analysis and the differentiation suppression by cell seeding density using the mouse cell line RA W264 and the osteoclast differentiation system that has the ability of RANKL protein last year.
- the transcriptional regulator NFAT2 whose expression is induced by RANKL is important for the formation of multinucleated cells. Normally, NFAT2 is phosphorylated in the cytoplasm and inactive in osteoclast progenitor cells.
- Ca 2+ and Ca 2+ — CaM bind and become active.
- NFAT2 is dephosphorylated by the hydrated calcium. Dephosphorylated NFAT2 migrates into the nucleus approximately 24-48 hours after RANKL stimulation, destroying various enzymes responsible for cell fusion and osteolysis Induces gene expression related to bone cell formation and functional expression. Conversely, osteoclast precursor cells treated with tacrolimus (hereinafter also referred to as FK506), an inhibitor of NFAT2, do not differentiate into osteoclasts.
- tacrolimus hereinafter also referred to as FK506
- FK506 an inhibitor of NFAT2
- the present inventor confirmed that the amino acid L-serine or L-glycine is essential for the expression of the NFAT2 gene, and that the NFAT2 gene is not expressed in the state where L-serine and L-glycine are deficient. As a result, it was found that osteoclasts do not fuse and osteoclasts do not mature, and the present invention was completed. That is, the present invention relates to a method for controlling the expression of NFA T2 essential for osteoclast formation, a drug and a medicament for use in the control, and a screening method thereof, more specifically, the present invention relates to
- L-serine analog is D-serine, L-homoserine, their salts or their The method according to (4) above, which is a tellurium,
- a method for screening a substance that affects osteoclast formation wherein (a) signal transduction of L-serine and Z or L dalysin in osteoclast precursor cells in the presence of a sample containing a test substance. Detection of inhibition or promotion, and (b) suppression of signal transduction of L-serine and Z or L glycine for suppression of osteoclast formation, or promotion of signal transmission of L serine and Z or L glycine.
- a step associated with promoting bone cell formation (a) signal transduction of L-serine and Z or L dalysin in osteoclast precursor cells in the presence of a sample containing a test substance. Detection of inhibition or promotion, and (b) suppression of signal transduction of L-serine and Z or L glycine for suppression of osteoclast formation, or promotion of signal transmission of L serine and Z or L glycine.
- a method for screening a substance that antagonizes L-serine involved in osteoclast formation and (a) a step of culturing osteoclast precursor cells in a medium containing a test substance, L-serine and RANKL. And (b) detecting inhibition of L-serine and Z or L-glycine signaling in osteoclast precursor cells, and
- a method for screening L-serine and Z or L glycine-like substances involved in osteoclast formation comprising (a) a test substance and RANKL, Culturing osteoclast progenitor cells in a medium containing no H and Z or L glycine, and (b) detecting the promotion of L serine and Z or L glycine signal transduction in osteoclast progenitor cells.
- the present invention provides:
- NFAT2 expression can be suppressed, so that osteoclast precursor cell strength can be suppressed.
- osteoclast precursor cell strength can be suppressed.
- bone destruction by osteoclasts can be effectively suppressed.
- a drug that regulates NFAT2 expression, particularly NFAT2 gene expression through a signal pathway that targets NFAT2 of the present invention, particularly NFAT2 gene is associated with NFAT2-related diseases, such as normally mineralized bone matrix.
- the present invention can provide a screening system for a novel NFAT2 expression control method by measuring the effective concentrations of L-glycine and Z or L-serine, and is therefore useful for searching for a novel NFAT2 expression control agent.
- FIG. 1 is a diagram showing differentiation of mouse RAW264 cells into osteoclasts in in vitro experiments.
- MN cells indicate multinucleated cells.
- FIG. 2 shows the results of Western blotting of RAW264 cell extract.
- Medium Fi Fresh medium
- Ci conditioned medium (same in the diagram below).
- FIG. 3 shows the results of Western blotting of RAW264 cell extract after RANKL stimulation.
- FIG. 4 A) shows the results of Western blotting of NFAT2-siRNA-expressing cell extract, and B) shows NFAT2-siRNA-expressing cells after RANKL stimulation.
- FIG. 5 is a graph showing the relationship between the seeding cell density of RAW264 cells and the polygonal cell formation rate.
- a cell density of 1 indicates 2.5 x 10 4 cells Zwell.
- FIG. 6 shows the results of Western blotting of RAW 264 cell extract after RANKL stimulation in low density seeding or high density seeding of RAW264 cells.
- FIG. 7 shows the results of Western blotting of RAW264 cell extracts after RAWKL stimulation after seeding RAW264 cells with different cell densities.
- a cell density of 1 indicates 2.5 x 10 4 cells Zwell.
- FIG. 8 is a diagram showing RAW264 cells when differentiation is induced in different media and the differentiation induction efficiency of the cells.
- FIG. 9 shows changes in medium components and the influence of NEAA on NFAT2 expression in RAW264 cells.
- FIG. 10 shows the effect of NEA A on NFAT2 expression in RAW264 cells seeded with high density or with high density.
- L indicates low density sowing and H indicates high density sowing.
- FIG. 11 shows the effect of NEAA on NFAT2 expression in RAW264 cells.
- FIG. 12 is a diagram showing the influence of NEAA on RAW264 cell proliferation.
- FIG. 13 shows the influence of amino acids on NFAT2 expression in RAW264 cells using Conditioned medium.
- A represents alanine
- D represents aspartic acid
- E represents dartamic acid
- G represents glycine
- N represents asparagine
- P represents proline
- S serine
- FIG. 14 shows the influence of amino acids on NFAT2 expression in RAW264 cells using Fresh medium.
- FIG. 15 shows the effect of serine analogs on NFAT2 expression in RAW264 cells using Fresh medium.
- Ser represents serine (the same in the following figures)
- D represents D-serine
- L Homo represents L homoserine.
- FIG. 16 shows the influence of D-serine on NFAT2 expression in RAW264 cells.
- FIG. 17 is a diagram showing cell density-dependent multinucleated cell formation of osteoclast precursor cells.
- A) The results of differentiation induction of osteoclast progenitor cells obtained from mouse bone marrow cells at different cell densities into osteoclasts are shown in relation to the number of TRAP-positive cells and the cell concentration.
- B) shows the morphology of multinucleated cells.
- FIG. 18 is a graph showing the decrease of sesamerine in the medium and the expression of NFA T2 depending on the L-serine concentration in high-density culture.
- FIG. 19 shows the influence of cell density and L-serine on c-Fos expression.
- A) Western blotting shows the expression of c-Fos when RAW264 cells seeded at low honey were cultured in the presence of RANKL.
- c) Western blotting shows the expression of c-Fos and NFAT 2 after RAW264 cells are seeded at low density and cultured in a medium supplemented with NEAA, L-serine or L-glycine. The numerical value of each lane shows the following.
- FIG. 20 is a diagram showing the influence of L-serine on the differentiation of bone marrow cells into osteoclasts.
- A) Shows the effect of L-serine on bone marrow cell proliferation. The vertical axis shows the results of measuring the degree of cell growth / death by MTT activity. The serine concentration XI on the horizontal axis is equal to the normal amount (0.1 mM).
- B) The effect of L-serine on the formation of multinucleated cells in bone marrow-derived osteoclast precursor cells. The left figure shows the amount of multinucleated cells formed, and the right figure shows the cell morphology. * Indicates that there is a significant difference (P ⁇ 0.05) according to Student 'st test.
- the left figure shows the amount of multinucleated cells, and the right figure shows the morphology of GFP-expressing cells and NFAT2-expressing cells (TRAP staining).
- the present invention relates to a method for suppressing the expression of NFAT2. More specifically, osteoclast formation is suppressed by suppressing L-serine and Z- or L-glycine signaling pathways in osteoclast precursor cells and suppressing NFA T2 expression, particularly NFAT2 gene expression.
- the present invention also relates to a method of inhibiting, and further to a preventive and Z or therapeutic agent for NFAT2-related diseases by controlling the expression of NFAT2, and a screening method thereof.
- the present invention will be described.
- L-serine and Z or L-glycine signaling pathway is a signal transduction essential for osteoclast formation from osteoclast progenitor cells along with RANKL (receptor activator of NF ⁇ B ligand) pathway A route that can be an independent route or a route that responds to another route.
- the signal transduction pathway of L-serine and Z or L-glycine is different from the above signal transduction pathway, and L-serine and Z or L-glycine are involved in part of the different transduction pathway and NFAT2 is expressed.
- a transmission pathway in which the NFAT2 gene is expressed is also included.
- Ostoclast refers to a fusion of mononuclear osteoclast precursor cells differentiated from monocyte / macrophage cells originating from hematopoietic stem cells (hereinafter abbreviated as CFU-M). Multinucleated giant cells (Suda, T. et al., Endocr., Rev. XXV, p.
- Osteoclasts secrete collagenase that digests the bone matrix and show bone resorption.
- mature osteoclasts express tartrate-resistant acid phosphatase (hereinafter abbreviated as TRAP), calcitonin receptor, and vitronectin receptor.
- TRAP tartrate-resistant acid phosphatase
- TRAP or calcitonin receptor calcitonin receptor
- vitronectin receptor can be used as an indicator of osteoclast formation (bone resorption marker). Therefore, osteoclast formation is at least one of these indicators. Judgment can be made based on the measurement.
- Osteoclasts are preferably TRAP-positive and have bone resorption activity. Osteoclasts also share CFU-M force as described above.
- the differentiation can be performed by, for example, bone marrow monocyte / macropnage precursor cells (BMMs) isocratic macrophage colony s timulating factor; M-CSF), Intai-Leukine-3 (IL-3), Granulocyte-Macroph Ding ⁇ , Ncoloni ' ⁇ Stimulating Factor (GM-CSF), 1, 25-Dihydroxy In the presence of vitamin D3 (1, 25 (OH) D)
- BMMs bone marrow monocyte / macropnage precursor cells
- M-CSF isocratic macrophage colony s timulating factor
- IL-3 Intai-Leukine-3
- GM-CSF Granulocyte-Macroph Ding ⁇
- GM-CSF Ncoloni ' ⁇ Stimulating Factor
- osteoclasts can be observed, for example, according to the literature (Yasuda, H. et al., Proc. Natl. Acad. Sci. USA, 95th, p. 3597-602 (1998)).
- S can.
- a bone slice can be prepared and bone resorption can be observed.
- osteoclast formation both in vivo and in vitro by identifying multinucleated giant cells by microscopic observation, known detection methods such as TRAP staining and detection of calcitonin receptor or vitronectin receptor expression. Can be detected.
- the bone resorption ability can be evaluated by a known method, for example, a Pit formation assay method for measuring the pit formation area on the ivory slice.
- the “osteoclast precursor cell” includes monocytes / macrophage cells that can differentiate into osteoclasts, and more specifically, cells whose proliferation is promoted in response to M-CSF or the like. Is preferred. Osteoclast precursor cells are cells contained in the bone marrow or spleen It may be an immortalized cell line. Osteoclast precursor cells can also be separated from hematopoietic stem cells in vitro.
- “suppressing L-serine and Z or L glycine signal transduction pathway” is a signal transduction pathway that transmits L-serine and Z or L glycine concentrations and their functional information, and includes NFAT2 This refers to the suppression of signal transduction pathways involved in the expression of NFATcl (hereinafter referred to as NFAT2), particularly the expression of the NFAT2 gene, and also includes the inhibition or suppression of signal transduction itself.
- NFAT2 NFAT2
- L-serine and Z or L glycine antagonists are administered to reduce the effective concentration of L-serine and Z or L glycine, L-serine and Z or L glycine metabolism, These include the ability to substantially reduce the concentration of L-serine and Z or L-glycine by promoting modification and Z or degradation, and to block the receptors for L-serine and Z- or L-glycine with antibodies.
- the signal transduction pathway may suppress any expression of binding protein such as a receptor or a transporter that senses the concentration of L-serine, L-glycine, or their derivatives.
- Its binding protein strength includes suppression of NFAT2 expression, particularly suppression of signal transduction pathway leading to expression of NFAT2 gene.
- a signal indicating that the concentration or activity of L-serine and Z- or L-glycine is substantially reduced can be transmitted to suppress the expression of NFAT2, particularly the expression of the gene for NFAT2, it is possible to suppress any part of the signal transduction pathway. May be.
- signals are transmitted via substances synthesized from L-serine and Z or L-glycine, or metabolites generated from L-serine and Z- or L-glycine (including lipids and sugars with serine added). This also includes cases where the suppression of NFAT2 expression, particularly the suppression of NFAT2 gene expression.
- L-serine and Z or L-glycine in order to suppress the signal transduction pathway of L-serine and Z or L-glycine, it is a transduction pathway different from the signal transduction pathway of serine and Z or L-glycine, and at least part of the different transduction pathway.
- L-serine and Z or L-glycine when L-serine and Z or L-glycine are involved and NFAT2 is expressed, particularly when the NFAT2 gene is expressed, it also includes inhibiting the involvement (action) of L-serine and Z or L-glycine.
- NFAT2 is one of the transcription factors that are dephosphorylated and translocated into the nucleus and activated in a Ca + -calcuulin-dependent manner. NFAT2 was discovered as a factor that regulates the production of cytoforce-in in T cells, but plays an important role in the function or sorting of many cells (Crabtree, GR and Olson, EN, Cell, No. 1). 109 ⁇ : S67-S79, 2000) o Therefore, such functions and functions can be suppressed by suppressing the expression of NFAT2 by the method or agent of the present invention.
- NFAT2 the base sequence of human NFAT 2 mRNA is shown in Accession number NM-006162, and the amino acid sequence of the protein is shown in NP-006153.
- NFAT2 includes fragments, homologues, homologues, derivatives, and mutants, provided that the biological function is equivalent to that of NFAT2 represented by the above specific amino acid sequence alone. Is done.
- homologues include N FAT2 of other species such as mice and rats that correspond to human NFAT2, and these are identified by HomoloGene (http: ZZwww.ncbi.nlm.nih.gov ZHomoloGeneZ), etc. It can be identified a priori from the base sequence of the generated gene.
- mouse NFAT2 mRNA is Accession number AF239169, AF087434 (Isoform a), and AF049606 (Isoform b), and the amino acid sequences of the NFAT2 proteins encoded by these are AAC36725, AAC 36725, and AAC0550, respectively. This is shown!
- Variants also include naturally occurring allelic variants, non-naturally occurring variants, and variants having amino acid sequences modified by artificial deletions, substitutions, additions and insertions.
- the above-mentioned mutant includes a protein or (poly) peptide having no mutation and an amino acid sequence of at least about 70%, preferably about 80%, more preferably about 95%, and still more preferably about 97%. Things can be mentioned.
- Suppression of NFAT2 expression includes suppression of NFAT2 gene expression, transcription and Z or translation of NFAT2 gene, and transcriptional repression through suppression of NFAT1 expression and activity (Zhou B et. Al., J Biol. Chem., 277, p. 10704, 2002), NFAT2 mRNA destabilization, NFAT2 protein degradation, exogenously cleaves antisense nucleic acid or NFAT2 mRNA against NFAT2 mRNA Inhibition of NFAT2 expression by expressing ribozyme or RNAi is included.
- Preferred U ⁇ NFAT2 expression The suppression of NFAT2 gene is suppressed.
- a gene in the sense of including not only double-stranded DNA but also each sense strand and antisense strand constituting the single-stranded DNA.
- the length is not particularly limited. Therefore, in this specification, unless otherwise specified, a gene (DNA) has double-stranded DNA including human genomic DNA and single-stranded DNA (positive strand) including cDNA and a sequence complementary to the positive strand. Single-stranded DNA (complementary strand) and any of these fragments are included.
- the gene or DNA includes not only a gene or DNA represented by a specific nucleotide sequence but also a protein having a biological function equivalent to the protein encoded by these (for example, homologues, homologues, mutants and derivatives). Etc.) are included.
- Examples of the gene or DNA encoding such a homologue, mutant or derivative include a gene or DNA that also has a base sequence ability to hybridize with a complementary sequence of a specific base sequence under stringent conditions.
- the stringent conditions here are nucleic acids that bind complexes or probes as taught by Berger and Kimmel (1987, Guide to Molecular Cloning Techniques Methods in Enzymology, Vol. 152, Academic Press, San Diego CA). Can be determined based on the melting temperature (Tm).
- the post-hybridization washing conditions usually include conditions of about “1 ⁇ SSC, 0.1% SDS, 37 ° C.”.
- the complementary strand is preferably one that maintains a hybridized state with the target positive strand even when washed under strong conditions.
- the more stringent hybridization conditions are approximately “0.5 X SSC, 0.1% SDS, 42 ° C”, and more stringent hybridization conditions (washing conditions after hybridization).
- a complementary chain a strand having a nucleotide sequence that is completely complementary to the base sequence of the target positive strand, and at least about 90%, preferably about 95% of the strand.
- An example is a chain having a homologous nucleotide sequence.
- a substance that antagonizes L-serine refers to a lower L-serine concentration or activity in the L-serine and Z- or L-glycine signal transduction pathway.
- examples of such substances include amino acid analogs of L-serine and Z or L-daricin.
- Typical examples include, but are not limited to, D-serine and L-homoserine, which are amino acid analogs that can suppress the L-serine and Z- or L-glycine signaling pathways, and express NFAT2 (preferably NFAT2 residues). Anything can be used as long as it can suppress the expression of the gene).
- NFAT2 The expression of NFAT2 can be observed by Western plot, for example, by adding a substance that antagonizes L-serine to cultured cells as in Example 10. Since the differentiation of osteoclasts can be determined using the index of polynuclearization (cell fusion), TRAP, calcitonin receptor, vitronectin receptor, collagenase expression or bone resorption ability, The effect of a substance that antagonizes L-serine and Z or L-glycine is determined using the negative indicator as an indicator.
- L-serine analog typically refers to an amino acid analog of L-serine, but is not limited thereto.
- the L-serine analog may be any substance that is structurally or functionally similar to all or part of L-serine, for example, acts in competition with L-serine in vivo.
- L-serine receptor may be a substance designed by drug design from L-serine receptor and a substance that antagonizes L-serine.
- pharmaceutically acceptable salts of L-serine include alkali metal (potassium, sodium, lithium, etc.) salts, alkaline earth metal (calcium, magnesium, etc.) salts, ammonium salts (tetramethylammonium salts), and the like.
- L-Um salt tetrabutylammonum salt, etc.
- organic amine triethylamine, methylamine, dimethylamine, etc.
- acid adduct salt organic acid salt (hydrochloride, hydrobromide, hydroiodide) Sulfate, phosphate, nitrate, etc.) or organic acid salt (acetate, lactate, tartrate, oxalate, fumarate, maleate, benzoate, kenate, methanesulfonate , Glucuronate, dalconate, etc.
- L-serine ester include And esters of lower alkyl groups such as ru, ethyl and propyl.
- the L-serine analog may be a hydrate or a solvate.
- Hydrates or solvates are preferably non-toxic and water-soluble. Examples of the hydrate include monohydrate, dihydrate, 1Z2 hydrate, or 4Z3 hydrate. Examples of the solvate include alcohol-based solvates such as an adduct of ethanol. Is mentioned.
- L-serine-like substances include D-serine and L-homoserine.
- D-serine or L-homoserine may be a salt thereof or an ester thereof.
- the salts include all pharmaceutically acceptable ones.
- examples of the salt include the above-described pharmaceutically acceptable salts of L-serine.
- Examples of the ester form include the above-described ester forms of L-serine.
- Specific examples of D-serine, L-homoserine, their salts, or esters thereof include D-serine methyl ester hydrochloride and L 2 O strong oil homoserine.
- a substance that antagonizes L-serine is brought into contact with the signal transduction pathway of L-serine and Z- or L-glycine.
- the contact includes contact with a protein in which L-serine and Z or L-glycine act or associate, or contact with, for example, a cell, tissue or individual having the signal transduction pathway.
- the ability to antagonize L-serine for example, compete with L-serine and Z or L-glycine, etc. Inhibits or suppresses signal transmission.
- the method of the present invention by suppressing the signal transduction pathway of L-serine and Z or L-glycine, it is possible to suppress the expression of NFAT2, particularly the expression of the NFAT2 gene.
- NFAT2 When the expression of NFAT2 is suppressed, osteoclast formation is inhibited.
- Osteoclasts are cells that absorb bone, and abnormalities in the cells cause NFAT2-related diseases such as osteoporosis and bone diseases such as marble bone disease and immune diseases. Therefore, the method of the present invention can be used in a method for preventing or treating NFAT2-related diseases such as bone diseases and immune diseases such as osteoporosis and marble bone disease.
- NFAT2 induces a site-in force that activates immune responses such as interleukin 2 (IL 2). Since it is known to have a conducting activity, the method of the present invention can also be used for immunosuppression.
- IL 2 interleukin 2
- the method of the present invention it is preferable to contact and Z or introduce a substance that antagonizes L-serine, such as D-serine, into osteoclast precursor cells.
- a substance that antagonizes L-serine such as D-serine
- osteoclast progenitor cells By contacting osteoclast progenitor cells with substances that antagonize L-serine, such as D-serine and L-homoserine, efficiently disrupt NFAT2 expression in osteoclast precursor cells, especially by suppressing NFAT2 gene expression. It can inhibit bone cell formation.
- the method of the present invention comprises administration of an effective amount of a substance that antagonizes L-serine, such as D-serine, L-homoserine, a salt thereof or an ester thereof, to a mammal.
- the administration may be either oral administration or parenteral administration as long as the signal transduction pathway of L serine and Z or L glycine in the living body can be suppressed.
- Substances that antagonize L-serine, such as D-serine and L-homoserine, which are used in the method for suppressing the expression of the NFAT2 gene of the present invention, can suppress the formation of osteoclasts.
- it can be used as a preventive or therapeutic agent for autoimmune arthritis such as rheumatoid arthritis, osteopenic disease such as osteoporosis, or as an immunosuppressive agent such as immune disease.
- One embodiment of the present invention includes administration of D-serine, for example.
- Administration of D-serine suppresses NFAT2 expression, particularly NFAT2 gene expression.
- the concentration of D-serine necessary for this suppression is about 5 to 20 times, preferably about 10 times that of L-serine.
- the method for suppressing NFAT2 expression is also preferably used in combination with a drug or the like that inhibits osteoclast formation.
- a drug or the like that inhibits osteoclast formation examples include an inhibitor of calci-eurin.
- Inhibitors of calcineurin include FK506, cyclosporin A (CyAZCsA), and analogs thereof.
- the screening method of the present invention can be performed, for example, using an osteoclast differentiation system. wear. That is, the screening method of the present invention comprises the following steps (a) and (b): (a) L-serine and Z or L glycine signaling in osteoclast precursor cells in the presence of a sample containing the test substance. Detecting the suppression or promotion of
- osteoclast precursor cells for example, bone marrow macrophage cells.
- bone marrow macrophage cells are preferably used. More specifically, BMMs, RAW264.7 cells (macrophage-like cells; sometimes abbreviated as RAW264 cells), embryonic stem cells (ES cells), and the like. RAW264 cells are preferred.
- mouse RAW264 cells (RIKEN Cell Bank; HYPERLINK HYPERLINK "htt p: ZZ www.rtc.riken.go.jpZ CELL / HTML / RIKEN" http: //www.rtc.riken.go.jpZ CELL / HTML / RIKEN ⁇ http: / / www. Rtc. Riken. Go. Jp / CELL / HTML / RIKEN Cell Bank. (Available from Html) can be divided into osteoclasts by adding RANKL, a differentiation inducer. Is a known cell (Biochem. Biophys. Res. Commun. 282, 278-283 (2001)).
- osteoclast precursor cell force For osteoclast formation, it is usually preferable to stimulate osteoclast precursor cells with RANKL in the presence of M-CSF. Specifically, for example, to form osteoclasts from BMM or ES cells, RANKL stimulation is performed in the presence of M-CSF.
- concentration of M-CSF and RANKL can be adjusted as appropriate.
- the concentration of M-CSF is about 1 to 20 ngZmL, preferably about 5 to 15 ngZmL, more preferably about 8 to 12 ngZmL.
- the concentration of RANKL is about 10 to 20 Ong / mL, preferably about 50 to 150 ngZmL, more preferably about 80 to 120 ngZmL.
- cells that differentiate into osteoclasts in response to RANKL in an M-CSF-independent manner such as RAW264 cells, can be used to form osteoclasts, even in the absence of M-CSF. Since differentiation is possible, only RANKL stimulation needs to be performed.
- the concentration of RNAKL The degree is the same as the above-described concentration.
- osteoclasts in which frozen rat osteoclast progenitor cells (derived from bone marrow), a dedicated medium containing M-CSF and RANKL, and dentin slices for Pit formation assay are set.
- a culture kit manufactured by Hokudo Co., Ltd.
- the like can also be preferably used.
- the sample containing the test substance is not particularly limited, for example, a library of amino acid analogs, a library of synthetic low molecular weight substances, purified proteins, expression products of gene libraries, libraries of synthetic peptides, cell extraction Liquids, cell culture supernatants, plant extracts, microorganism-derived substances, and the like.
- NFAT2 expression can be detected using a known method such as Western blot, dot blot or slot blot, for example, using an antibody that specifically binds to NFAT2.
- a known method such as Western blot, dot blot or slot blot, for example, using an antibody that specifically binds to NFAT2.
- the Western plot method uses an NFAT2 antibody as a primary antibody, then a chemiluminescent reagent such as HRP (horseradish bar oxidase) as a secondary antibody, a radioisotope such as 125 ⁇ , and a fluorescent substance.
- HRP horseradish bar oxidase
- a labeled antibody (antibody that binds to the primary antibody) labeled with a signal such as chemiluminescence, radioisotope, fluorescent substance, etc. of the obtained labeled compound, the fluorescence emission detector, radiation measuring instrument, It can be carried out by detecting and measuring with a fluorescence detector or the like.
- NFAT2 expression is preferably detected by detecting the expression level of a gene.
- the detection of the NFAT2 gene at the gene expression level uses the RNA prepared from the cells or a polynucleotide complementary to the RNA transcribed from the RNA and the promoter region of the NFAT2 gene or NFAT2 gene, for example.
- RNA prepared from the cells or a polynucleotide complementary to the RNA transcribed from the RNA and the promoter region of the NFAT2 gene or NFAT2 gene, for example.
- Northern blotting and RT-PCR Reverse Transcription Polymerase Chain Reaction
- NFAT2 binding sequence [GGAAAA and its similar sequences (eg, GGAAAN, etc., N is A, T, C, or G), Macian, F. et al., Oncogene, XXV, p. 2476-2489. , 2001], preferably NFAT2 and transcription factor AP-1 (activator monoprotein 1) binding sequence [TGA [GZC] TCA and similar sequences (eg, TGNNTCA, etc., where N is A, T, C, or G) ,: Bio Science New DNA containing the term library “transcription factor”, experimental medicine separate volume, Yodosha, pp. 204-205] is preferred.
- a DNA having a desired reporter gene bound downstream of the DNA can also be preferably used.
- transcription from the NFAT2 promoter can be monitored by quantifying the expression level of the reporter gene using reporter activity or the like as an index.
- specific examples of the promoter sequence include a TRAP promoter and a calcitonin promoter (P3 promoter).
- the reporter gene include luciferase gene, fluorescent protein gene (GFP, YFP, BFP, etc.), chloramphee-cole acetyltransferase gene, monogalactosidase gene, and the like.
- genes induced by NFAT2 include TRAP, calcitonin receptor, cathepsin K, canolepoc anhydrase II (carbonic anhydrase II; CA 11), or a gene such as matrix metalloproteinase (MMP) 9.
- Promoter sequences containing the NFAT2 binding sites of these genes can be suitably used as promoters linked to the reporters.
- These genes are induced in the final segment of osteoclasts and contain multiple NFAT2 and AP-1 binding sites (Anusaksathien, O. et al., J Biol. Chem., 276, p. 22663). -22674, 2001; David, P. et al., J.
- the detection and quantification of the expression level of the NFAT2 gene is performed by connecting a marker gene such as a luciferase gene to the gene region that controls the expression of the NFAT2 gene (expression control region)! Can also be carried out by measuring the activity of the protein derived from the marker gene.
- the screening method for an NFAT2 expression control substance of the present invention includes a method for searching for a target substance using the expression level of the marker gene as an index.
- the concept of “NFAT2 gene” includes a fusion gene between the expression control region of the NFAT2 gene and a marker gene.
- the marker gene includes a structural residue of an enzyme that catalyzes a luminescence reaction or a color reaction.
- the gene is preferred.
- reporter genes such as chloramphenicol acetyltransferase gene, j8 glucurodase gene, j8 galactosidase gene, and equorin gene may also be used. it can.
- the expression control region of the NFAT2 gene for example, about 1 kb upstream of the transcription initiation site of the gene, preferably about 2 kb can be used. Creation of the fusion gene and measurement of the activity derived from the marker gene can be performed by known methods.
- Suppression or promotion of NFAT2 protein or NFAT2 gene expression as an indicator is based on the expression level of the reporter gene by the NFAT2 protein or NFAT2 gene or NFAT2 inducible promoter in a control cell without adding a test substance. This can be done by comparing the expression level of the NFAT2 protein or the gene in the cells to which the test substance is added. For example, the expression level of the NFAT2 protein or the gene in the cell to which the test substance is added is about 90% or less, preferably 40% or less of the expression level of the NFAT2 protein or the gene in the control cell to which no test substance is added.
- the test substance suppresses signal transduction of L-serine and Z or L-glycine in osteoclast precursor cells when it is lower than 30%, particularly preferably lower than 20%, particularly preferably lower than 10%.
- the expression level of the NFAT2 protein or the gene in the cell to which the test substance is added is about 110% or more of the expression level of the NFAT2 protein or the gene in the control cell to which the test substance is not added, preferably Is 120% or higher, more preferably 130% or higher, particularly preferably 150% or higher
- the test substance is a candidate for promoting L-serine and Z or L glycine signaling in osteoclast precursor cells It can be selected as a substance.
- association between the suppression or promotion of NFAT2 protein or NFAT2 gene expression as an indicator and the suppression or promotion of osteoclast formation is related to the formation of osteoclasts when the expression of NFAT2 protein or NFAT2 gene as an indicator is suppressed.
- osteoclast formation should be promoted to the same extent.
- the screening method of the present invention provides a candidate substance that becomes an active ingredient of a preventive or therapeutic agent for bone metabolic abnormalities related to osteoclast formation by searching for substances that suppress the expression of NFAT2 or NFAT2 gene. To do.
- Selection of candidate substances can be performed using as an indicator that the expression of NFAT2 or NFAT2 gene induced by the expression inducer is suppressed by the presence of the test substance. That is, the expression of NFAT2 or NFAT2 gene in cells contacted with a test substance in the presence of an expression inducer is lower than that of a control cell that does not contact the test substance in the presence of an expression inducer! /! Control cells.
- the test substance can be selected as a candidate substance. Specifically, L-serine and Z or L-glycine signal transduction is measured by the above method in the presence of a sample containing the test substance, and a substance that promotes or suppresses the signal transduction is selected compared to the control.
- Control conditions include the absence of the test substance or a lower dose, typically in the absence of the test substance (e.g., only the carrier used to add the test substance). (Addition).
- the test substance containing a lower dose is used as a control condition, the dose dependency of the substance becomes clear.
- NFAT2 expression or NFAT2 gene expression in cells contacted with a test substance in the presence of an expression inducer is lower than that in positive control cells contacted with a known compound that regulates osteoclast formation.
- the test substance can be selected as a candidate substance by becoming or becoming higher.
- a substance that promotes or suppresses signal transduction of L-serine and Z- or L-glycine can be selected as compared with the case in the presence of the compound used as a positive control. In such screening, a substance having a higher effect than that of a compound used as a positive control can be obtained.
- NFAT2 NFAT2 gene
- the screening method of the present invention searches for substances that promote the expression of NFAT2 or the NFAT2 gene, and thus is a candidate substance that serves as an active ingredient for the prevention and Z or therapeutic agent of bone metabolic disorders related to osteoclast formation. Is to provide.
- Selection of candidate substances can be performed using as an indicator that the expression of NFAT2 or NFAT2 gene induced by the expression inducer is promoted by the presence of the test substance. That is, the expression of NFAT2 or NFAT2 gene in cells contacted with a test substance in the presence of an expression inducer is higher than that of a control cell that does not contact the test substance in the presence of an expression inducer!
- the test substance can be selected as a candidate substance.
- L-serine and Z or L-glycine signal transduction is measured by the above method in the presence of a sample containing the test substance, and a substance that promotes or suppresses the signal transduction is selected compared to the control. Control conditions and the like are the same as in the search for a substance that suppresses the expression of NFAT2 and Z or NFAT2 gene.
- Examples of the medium used in the screening method of the present invention include a natural medium, a semi-synthetic medium, a synthetic medium, a solid medium, a semi-solid medium, and a liquid medium.
- a natural medium a nutrient medium that is used for culturing animal cells, particularly hematopoietic stem cells, it is possible to use s / m.
- Examples of such a medium include Dulbecco's Modified Eagles' Medium (DMEM), Ham's Nutrient Mixture Fl 2, Hamco's 5A medium, and McCoy's 5A medium.
- Minimum MEM medium Minimum Essential Medium; MEM
- ⁇ -MEM medium a-modified Minimum Essential Medium; a-MEM
- RPMI1640 medium Iscov's Modified Dulbecco's Medium (IMDM)
- IMDM Iscov's Modified Dulbecco's Medium
- StemPro34 Invitrogen
- X—VIVO 10 Cell
- X—VIVO 15 Cell
- HPGM Cell Technology
- StemSpan H3000 Stemline II
- Stemline II Stemline II
- QBSF-60 Quality Biological Company
- the screening method of the present invention can be performed using, for example, an in vitro assay system for osteoclast formation.
- non-contact bone marrow cells (5 ⁇ 10 5 cells per well of a 24-well plate) are cultured for 2 days in, for example, a MEM containing about 10 ng / mL of M-CSF, and soluble in about 10 mL / mL
- the sample containing the test substance is added here and cultured.
- an osteoporosis model mouse by ovariectomy or an endotoxin-induced bone resorption animal model The system using is used.
- an osteoclast-forming system from ES cells can be used.
- a screening system using ES cells cells lacking a desired gene involved in osteoclast formation can be used. If an osteoclast-forming system from gene-deficient ES cells is used, useful information can be obtained depending on which signal pathway of the osteoclast-forming signal the test substance is involved in.
- the test used is a candidate for a substance that regulates osteoclast formation.
- Substances isolated by this screening method are useful for controlling osteoclast formation, and are also useful for developing preventive and therapeutic agents for bone metastasis.
- the screening method of the present invention is also a method for examining the effect of a substance on osteoclast formation, a substance that suppresses osteoclast formation can be identified by this method.
- the screening method of the present invention can be used to screen for a substance that antagonizes L-serine involved in osteoclast formation.
- a test substance is added to a medium containing L-serine and RANKL, and osteoclast precursor cells are cultured, and signal transduction of L-serine and Z or L-glycine in osteoclast precursor cells is performed as described above. It is preferable to measure.
- the test substance can be identified as an antagonist of L-serine.
- the identified L-serine antagonist can be preferably used as a substance that suppresses osteoclast formation.
- the degree of the suppression is the expression level of the NFAT2 protein or the gene in the cells to which the test substance is added.
- the expression level is about 90% or less, preferably 40% or less, more preferably 30% or less, particularly preferably 20% or less, and particularly preferably 10% or less.
- a medium that does not contain L-glycine it is preferable to use a medium that does not contain L-glycine. Specifically, for example, a medium in which ⁇ -MEM force L-glycine is removed and any L-serine is added to the medium is prepared, and the prepared medium is used.
- BMM or ES cells can be cultured in the presence of M-CSF and RANKL, or RAW264 cells can be cultured in the presence of RANKL.
- concentrations of M-CSF and RA NKL are the same as those described above.
- the screening method of the present invention is also a method for screening L-serine and Z- or L-glycine-like substances involved in osteoclast formation.
- the test substance is added to the medium excluding L-serine and L-glycine and the osteoclast precursor cells are cultured, and L-serine and osteoclast precursor cells in the osteoclast precursor cells are cultured in the same manner as described above. It is preferred to measure Z or L glycine signaling. If the measurement shows that NFA T2 expression or NFAT2 gene expression is promoted, the test substance can be identified as L-serine and Z- or L-glycine-like substances.
- the identified L-serine and Z or L glycine-like substance can be preferably used as a substance that promotes osteoclast formation.
- the degree of the promotion is determined by the expression level of NFAT2 protein in the cells to which the test substance is added or the gene is not added to the test substance.
- a medium in which ⁇ -MEM is also removed from L-serine and L-glycine is prepared, and for example, BMM or ES cells are cultured in the presence of M-CS and RANKL using the prepared medium.
- BMM or ES cells are cultured in the presence of M-CS and RANKL using the prepared medium.
- RAW264 cells are cultured in the presence of RANKL.
- concentrations of M-CSF and RANKL are the same as those described above.
- the substance obtained by the screening of the present invention can be used as an inhibitor or promoter of osteoclast formation.
- the conditions for administration of the substance for clinical application can be determined using the osteoclastogenic system described herein. That is, by using the above-described test method, administration conditions including dosage, administration interval, and administration route can be examined, and conditions under which appropriate preventive or therapeutic effects can be obtained can be determined.
- Such a substance becomes a medicament for prevention or treatment of NFAT2-related diseases and the like.
- the substance may be used as it is or in a known pharmaceutically acceptable additive such as excipients (for example, lactose, sucrose, glucose, starch, crystalline cellulose, etc.), binders (for example, starch paste, hydroxypropyl cellulose, Carmellose solution, gum arabic solution, gelatin solution, sodium alginate solution, etc.
- excipients for example, lactose, sucrose, glucose, starch, crystalline cellulose, etc.
- binders for example, starch paste, hydroxypropyl cellulose, Carmellose solution, gum arabic solution, gelatin solution, sodium alginate solution, etc.
- Lubricant eg, magnesium stearate, talc, stearic acid, calcium stearate, etc.
- disintegrant eg, starch, carmellose sodium, calcium carbonate, etc.
- solvent eg, water for injection, sterile purified water, physiological Salt solution, buffer solution, vegetable oil, etc.
- emulsifier eg, polyoxyl 40 stearate, sorbitan sesquioleate, polysorbate 80, sodium lauryl sulfate, lauromacrogol, gum arabic, popidone, etc.
- suspending agent eg canolemellose, methyl) Noresenorelose, hydroxypropenoresenololose, hydroxypropinolemethylcellulose, popidone, etc.
- stabilizers eg sodium bisulfite, sodium thiosulfate, sodium edetate, sodium citrate, ascorbic acid, dibutylhydroxytoluene) N ), Preservative
- the pharmaceutical composition is prepared in a dosage form (tablet, pill, capsule, powder, granule, syrup, etc., orally administered; injection, infusion, external preparation, suppository, etc.) ) Etc., it can be administered orally or parenterally.
- the pharmaceutical composition may be a sustained-release preparation or a DDS (drug deli- nory) preparation together with a controlled release substance.
- the release controlling substance include ⁇ -hydroxycarboxylic acids known per se (eg, glycolic acid, lactic acid, hydroxybutyric acid, etc.), hydroxydicarboxylic acids (eg, malic acid, etc.), hydroxytricarboxylic acids (eg, cuenic acid).
- Etc. and other polymers synthesized by non-catalytic dehydration polycondensation, copolymers or mixtures thereof, poly- ⁇ -cyanacrylic acid esters, poly-amino acids (eg, poly- ⁇ -benzyl-L And biodegradable polymer substances such as maleic anhydride copolymers (eg, styrene maleic acid copolymers).
- Administration to patients depends on the nature of the active ingredient and the dosage form to be prepared, for example, transdermal, intranasal, transbronchial, intramuscular, intraperitoneal, intravenous, intraarticular, subcutaneous, spinal cord It can be performed intracavitary, intraventricularly, or orally, but is not limited thereto. Administration can be systemic or local, but when side effects due to systemic administration are a problem, local administration to the lesion site is preferred. Dosage, administration method, tissue migration of the active ingredient of the pharmaceutical composition, therapeutic purpose, although it varies depending on the patient's weight, age, symptoms, etc., those skilled in the art can appropriately select them.
- the pharmaceutical composition can be used as a preventive and Z or therapeutic agent for NFAT2-related diseases.
- NFAT2-related diseases include osteoporotic diseases in which bone mass is reduced by osteoclasts, or osteosclerotic diseases due to osteoclast formation failure or dysfunction.
- bone softening diseases include primary osteoporosis, age-related (senile) osteoporosis, secondary osteoporosis and the like.
- Secondary osteoporosis is caused by endocrine / metabolic abnormalities (eg, hyperparathyroidism, gonadal dysfunction, Turner syndrome, anorexia nervosa syndrome, Klinefelter syndrome, etc.), inflammation (eg, rheumatoid arthritis, etc.) , Based on congenital diseases (eg osteogenesis imperfecta, homocystinuria, mastocytosis, mastocytoma, mastocytosis, etc.), based on blood diseases (eg multiple myeloma, etc.), based on drugs (For example, steroid osteoporosis). Examples of osteosclerotic diseases include marble bone disease.
- the pharmaceutical composition of the present invention usually contains about 0.1 to 90% by mass of the therapeutic agent (the above substance) by weight of the total composition.
- the dosage varies depending on the type of active ingredient, administration route, administration subject or patient's age, body weight, symptoms, etc., and cannot be specified unconditionally, but for parenteral administration, about 0.0001 to 1000 mg / kg body weight per kg is preferred.
- Preferably ⁇ is about 0.001 to 300 mg, more preferably about 0.01 to: LOOmg.
- these dosage rates may be adjusted accordingly. preferable.
- the administration can be divided into 1 to several times, and can be administered about 1 to 5 times a day.
- the target individuals include humans or mice, non-human mammals such as rats, rabbits, inu or monkeys, and other vertebrates.
- Application to non-human mammals is also useful as a model for developing preventive or therapeutic methods for human bone destructive diseases or osteosclerotic diseases.
- New therapeutic protocols to prevent osteoporotic dysfunction and dysfunction in N FAT2-related diseases such as osteoporosis and bone destruction in autoimmune arthritis and marble bone disease Can be developed.
- the pharmaceutical composition of the present invention is useful for the treatment and prevention of NFAT2-related diseases.
- the pharmaceutical composition containing a substance that suppresses L serine and Z or L glycine signaling in osteoclast progenitor cells of the present invention is used for the treatment and prevention of osteopenic diseases involving bone resorption by osteoclasts and Z Or it is useful for prevention.
- Specific diseases that are the main treatment targets include autoimmune arthritis, particularly including rheumatoid arthritis (RA).
- RA rheumatoid arthritis
- Rheumatoid arthritis is an autoimmune chronic inflammatory disease in which the proliferated synovium actively invades osteochondral, resulting in multiple joint destruction.
- the preventive and Z or therapeutic agent for N FAT2-related diseases of the present invention is suitably used to prevent this joint bone destruction.
- N FAT2-related diseases to which the NFAT2-related disease prevention and Z or therapeutic agents of the present invention can be applied include periodontal disease.
- the preventive and Z or therapeutic agent for NFAT2-related diseases of the present invention includes bone resorption by osteoclasts including giant cell tumor, cancer bone metastasis, and pigmented villonodular synovitis (PVS). It can also be applied to various diseases in which hyperactivity is a disease state. It is also expected to be applied to the treatment of osteoporosis and hypercalcemia of cancer.
- the pharmaceutical composition containing a substance that promotes the signal transmission of L-serine and Z or L-glycine in osteoclast precursor cells of the present invention is an osteosclerotic disease caused by osteoclast formation or functional failure, Useful for prevention and Z or treatment of bone resorption disorders. Therefore, the preventive and Z or therapeutic agent for NFAT2-related diseases of the present invention can be used for diseases based on osteoclast dysplasia or dysfunction such as marble bone disease. [0044] The present invention can also be used in combination with other NFAT2 expression-suppressing (or promoting) agents or osteoclast formation-inhibiting (or promoting) agents.
- kits for the treatment of osteopenic disease which includes a kit containing a calci-eurin inhibitor and D-serine.
- a calci-eurin inhibitor in combination with D-serine, a synergistic inhibitory effect on osteoclast formation can be expected.
- cyclosporin A and FK506 are particularly preferable.
- non-essential amino acid was purchased from Nacalai Tesque (Kyoto), and L-homoserine and D-serine were purchased from Sigma (USA). [ 3 H] -L-serine was purchased from Amersham Bioscience. When various non-essential amino acids were added individually, they were adjusted to the same concentration as the final concentration when the above mixture was used. L-homoserine and D-serine will be described each time.
- SpectraZPor (registered trademark) 6 regenerated nitrocellulose dialysis membrane (MWCO lOOO) [manufactured by Spectrum Laboratories Inc.] was used for dialysis of serum.
- the dialysis membrane was cut to about 10 cm and rinsed easily with distilled water for culture.
- the dialysis membrane was immersed in a 5% sodium bicarbonate solution containing 10 mM EDTA, washed at 60 ° C. for 1 hour, and then washed with 1 L of distilled water for culture for 5 minutes. This washing with distilled water for culture was repeated three times. After washing, blood is applied to the dialysis membrane The supernatant was added and dialyzed overnight at 4 ° C.
- a MEM As a medium for inducing osteoclast progenitor cells from mouse bone marrow cells, a MEM [manufactured by Sigma] was dissolved in 1 L of distilled water for culture, and autoclaved at 120 ° C for 15 minutes. After high-pressure steam sterilization, lOOmL of rabbit fetal serum (FBS) was added to the medium cooled to room temperature, and M-CSF [manufactured by Sigma] was added to a final concentration of 5 ngZmL.
- FBS rabbit fetal serum
- Mouse monocyte macrophage-derived cell line RAW264 was seeded on a 10 cm plate and cultured in 10 mL of the above medium at 37 ° C. and CO concentration of 5%. Cells on one side of the plate
- Mouse bone marrow cells IX 10 6 Z-wells are seeded on a 24-well plate, cultured in a-MEM with 10% FBS, 5 ng ZmL M—CSF at 37 ° C, CO concentration 5%, non-adherent
- the PCR method was Pfx DNA polymerase (GIBCO-BRL) and 5 cycles of 94 ° C for 15 seconds, 52 ° C for 30 seconds, and 68 ° C for 1 minute were performed in a 50 L system according to the attached protocol. Thereafter, a cycle of 94 ° C for 15 seconds, 56 ° C for 30 seconds, and 68 ° C for 1 minute was performed for 15 cycles.
- the RANKL gene obtained by amplification by the PCR method was cleaved with the restriction enzyme Mnul, and the C-terminal region 244 amino acids of RANKL was converted to GST (glutathione S-transferase) of pGEX-2TK vector (Amersham Pharmacia Biotech).
- the vector pGEX-2TK-RANKL was constructed by inserting into BamHI and EcoRI sites located downstream of the coding region.
- This p GEX-2TK-RANKL [soluble GST-RANKL] and standard vector pGEX — 2TK [GST protein] was introduced into Escherichia coli JM109 and used to express recombinant protein.
- Super Broth Teryptone Peptone [manufactured by DIFCO] 2.5 g, Bact Yeast Extract [manufactured by DIFCO] 15 g, NaCl [manufactured by Nacalai Tester] 5 g ZlL HO) with ampicillin added at a final concentration of 50 ng ZmL.
- the main culture was performed at 37 ° C with 5 mL of the nutrient solution until the absorbance of the medium (wavelength: 600 nm) was in the range of 0.6 to 0.8. Thereafter, IPTG (Isopropyl- ⁇ -D-thiogalactopyranoside) was added to a final concentration of 0.25 mM, protein expression induction was started, and the cells were cultured at 18 ° C. for about 12 hours.
- IPTG Isopropyl- ⁇ -D-thiogalactopyranoside
- Glutathione Sepharose (registered trademark) 4B (50% s lurry [Amersham Pharmacia Biotech AB]) in the amount of 1Z1000 of the main culture solution was equilibrated in advance with NETN buffer, and the supernatant was added to the supernatant. The reaction was allowed to proceed for 8 hours at ° C.
- RAW264 Itoda ⁇ or 2. 5 X 10 4 cells in cells ⁇ or 24-well play Bok, 3. 5 cm play ⁇ or 10 X 10 4 cells in Bok, 20 X 10 4 cells in 6cm plate, the 10cm plates 50 X 10 Seeding to 4 pieces The cells were cultured at 37 ° C and CO concentration of 5% for 24 hours. Then contains soluble RANKL
- the medium was changed (0 hour), and the cells were cultured at 37 ° C and CO concentration of 5%. 72 hours later, freshly prepared again
- osteoclasts The induction of osteoclasts was performed according to the method shown in Takahashi, N. et al., Generating murine and steoclasts form bone marrow Methods Mol. Med. (2003), pp. 1 29-144.
- Osteoclast precursor cells obtained from bone marrow cells by the method shown in [Culture and maintenance of cells] were seeded on 24 well plates at 1 ⁇ 10 4 Z-wells and cultured for one day. Thereafter, 500 ngZmL of RANKL and lOOngZmL of M-CSF were added and induction was performed. Every 3 days, the medium was replaced with fresh medium containing the above-mentioned amounts of RANKL and M-CSF.
- the NFAT2 gene or the GFP gene for comparison was incorporated into the retroviral vector pCX 4puro, and each expression vector was obtained by drug selection with puromycin.
- These expression vectors were introduced into the packaging cell line Platinum-E (Plat E) together with the pE-eco vector and pGP vector (Takara), and the cells were cultured for 48 hours. The supernatant was filtered with a 0.22 ⁇ pore filter to obtain a stock of retovirus. Osteoclast precursor cells were cultured overnight in the presence of retrovirus, followed by induction of differentiation into osteoclasts as described above.
- acetic acid pH 5.2
- 0.026M tartaric acid 0.1% acetic acid (pH 5.2) containing 0.026M tartaric acid and 0.1M acetic acid (pH 5.2) containing 12.5mg / mL naphthol AS—BI phosphate mixed in a 24: 1 ratio to F
- a solution containing AST GARNET GBC in an appropriate amount and passed through a 0.8 m filter was used as a TRAP dyeing solution.
- 500 L of TRAP staining solution was placed on the cell-fixed plate and reacted at 37 ° C for 1 hour or longer. At this point, cells with TRAP activity are reddish purple. After the reaction, the TRAP staining solution was removed and the plate was washed with ultrapure water (Fig. 1; TRAP-stained MN cells).
- the culture plate was transferred to ice after a certain time, and the culture supernatant was removed. After washing the cells twice with PBS cooled to 4 ° C, an appropriate amount of EBC Lysis buffer (50 mM Tris-HCl pH 8.0, 120 mM NaCl, 0.5% NP—40, ImM EDTA, 0.5 mM)
- the cell extract was frozen in liquid nitrogen and stored at 80 ° C.
- the amount of protein in the prepared cell extract was measured by the Bradford method, the protein amount of each sample was made the same, and then separated by SDS polyacrylamide gel electrophoresis (SDS-PAGE).
- SDS-PAGE SDS polyacrylamide gel electrophoresis
- the protein was transferred onto a PVDF membrane [Poly VinyliDene Fluoride; manufactured by Millipore] by wet blotting using a blotting tank. After transfer, the PV DF membrane was washed with PBS for 5 minutes and blocked with 5% Skim MilkZPBS for 1 hour.
- the primary antibody diluted with 5% BSAZPBS was reacted for 2 hours or more.
- the PVDF membrane was washed with PBS for 5 minutes, PBST for 10 minutes, and PBS for 5 minutes in this order.
- the PV DF membrane was reacted with a secondary antibody diluted with 5% Skim MilkZPBS for 45 minutes at room temperature, then PBS for 5 minutes, PBST (Phosphate Buffered SalineZTween) for 10 minutes, and PBS for 5 minutes in this order.
- the PVDF membrane was washed, and the separated proteins were detected by ECL (Amersham Bioscience) or ECL Plus (Amersham Bioscience).
- Figure 2 shows the results of Western blotting using these protocols under the following conditions.
- NFAT2 10 to 20 ⁇ L / lane ⁇ detected with ECL plus (about 1 to 5 minutes)
- the medium was collected and passed through a 0.2 m filter to remove the cells. This was used as a low density recovery medium.
- 40 ⁇ 10 5 RAW264 cells were seeded on a 10 cm plate, and a medium collected by the same method was used as a high-density collection medium.
- the medium is 37 ° C, CO concentration is 5%
- Fresh medium The medium that had been cultured for 24 hours in 2 was designated as Fresh medium. These media were stored at 4 ° C, and the necessary amount of soluble RANKL was added to these media when osteoclast differentiation was induced.
- Middle force of NFAT2 gene sequence A target sequence (5, —GGTACGTACGGATATCA GG—3 ′; SEQ ID NO: 3) was selected, and the corresponding DNA was incorporated into a pSUPER vector (Oligo Engin, US) for expression. This vector was introduced into RAW264 cells together with a neomycin resistance cassette, and an NFAT2-siRNA expressing cell line was selected.
- NFAT2-siRNA expression cell prepared in Example 2 was confirmed.
- Cell lines were used.
- two clones, KD-l and KD-4, are shown as representative examples of the NFAT2-siRNA-expressing cell line.
- MOCK is a strain into which the vector itself used to express siRNA has been introduced (FIG. 4A).
- the number of cells When seeding RAW264 cells in a dish, the number of cells is increased to 0.5, 1, 2, 4, 4 or 8 times the cell density (2.5 10 4 cells 7 wells) for normal differentiation. After adjustment, differentiation into osteoclasts was induced under the same conditions. Each cell was stained with TRAP after the induction, and stained with TRAP positive cells. As a result, the higher the cell density, the higher the cell density under normal conditions, the lower the efficiency of osteoclast separation (the rate of formation of multinucleated cells). The formation of was almost undetectable (Fig. 5).
- V a cell line prepared with mouse bone marrow cell force instead of RAW264 cells.
- the cell number was set at a cell density (1.0 ⁇ 10 4 Z-rules) that normally induces cell sorting. They were prepared 5 times, 1 time, 2 times, 4 times, 8 times, 16 times, and 32 times, and induced to differentiate into osteoclasts under the conditions shown in “Example 1”. After the induction of each cell, TRAP positive cells were stained. As a result, it was confirmed that the formation of osteoclasts did not occur as the cell density increased as in the case of RAW264 cell mouse cells (FIGS. 17A and B). In this way, the same phenomenon as that of RAW264 cells was reproduced in the bone marrow cell line that more closely reflects in vivo phenomena.
- Fig. 8 compares the formation efficiency of multinucleated cells between the conditioned medium and fresh medium after 96 hours.
- NFAT2 expression changes In order to investigate the relationship between changes in medium components, NFAT2 expression changes, and multinucleated cell formation, we investigated the factors involved in the formation of multinucleated cells using NFAT2 expression as an index. Possible causes of changes in medium components were (1) some inhibitory factor was secreted under high-density culture, and (2) medium components changed under high-density culture. Therefore, create a conditioned medium with [pre-NEAA (+)] in the presence of NEAA and [pre-NEAA (-)] in the absence. Then, the effect of adding NEA A (post-NEAA) to the subsequent culture (low density) in the collected conditioned medium was investigated.
- NEAA may play an important role in the expression of NFAT2.
- Gin since there was concern about how NEAA might affect the growth of RAW264 cells themselves, in order to confirm that NEAA does not affect the growth of cells itself, (Gin), NEAA and RAW264 cells were cultured for 24 hours in the presence or absence of serum. As a result, cell growth and survival were greatly influenced by the presence or absence of serum and glutamine. It was found that there was almost no effect on the presence or absence of non-essential amino acids (Fig. 12).
- Fig. 16 the effect of D-serine on the formation of multinucleated cells was examined (Fig. 16). As a result, the following were divided. (1) No influence from serum dialysis treatment (Fig. 16A), (2) A force that progresses to the middle of L-serine without L-serine (Fig. 16B), (3 ) After 4 days of culture with D-serine + RANKL, cell viability deteriorates (Fig. 16C), (4) L-serine restores survival (Fig. 16D), (5) Further excess D-serine When applied, the formation efficiency of multinucleated cells decreases again (Fig. 16E).
- Example 10 From the experimental results of Example 10, it was shown that L-serine is involved in NFAT2 expression and multinucleated cell formation among a plurality of serine structural isomers.
- NFAT2 expression is dependent on L-serine, the following experiment was performed.
- RAW264 cells were cultured for 2 hours in a normal medium in the presence of 10% FBS under normal density conditions (2.5 10 4 7 wells; hereinafter the same for normal density).
- L-serine added to the medium was prepared so as to have a concentration of 0 times, 0.1 times, 0.3 times, and 1 times the normal amount (X 1; 0. ImM).
- the expression level of NFAT2 in the cultured cells was confirmed by Western blotting using an anti-NFAT2 antibody (FIG.
- RAW264 cells low Seeded at density (low: 2.5 X 10 4 Z-well) or high density (high: 2 X 10 5 Z-well), in the presence of RANKL [(+) RANKL] or in the absence [(-) RANKL] and cultured in a normal medium containing [ 3 H] -L-serine (10 ⁇ Ci / mL) for 24 hours.
- L-serine present in 10 L of medium was measured using a scintillation counter with 3 H radioactivity as an index.
- the abundance of L-serine in the medium decreased in proportion to the culture time, and the rate of decrease was higher under high density conditions than under low density conditions (FIG. 18A). Since there was no significant change in the amount of L-serine decrease with or without RANKL, the decrease in the amount of L-serine in the medium was mainly due to the cell seeding density. From the above results, it was confirmed that the inhibition of multinucleated cell formation due to an increase in cell density was caused by a decrease in the expression level of NFAT2 due to a decrease in the abundance of L-serine in the medium.
- NFAT2 transcription factor 279, 26475- 26480. Since the expression of NFAT2 decreases in proportion to the cell density, the expression of cFos under the same conditions as in Example 3 was examined.
- RAW264 cells were cultured at normal density in the presence of RANKL for 48 hours, collected at multiple time points, and c-Fos protein level was measured by Western blotting using anti-c Fos antibody (FIG. 19A).
- the expression level of c-Fos protein decreased from 12 hours to 24 hours after RANKL stimulation. After culturing RAW264 cells at low density (normal density) and high density (8 times) for 24 hours, the amount of c Fos protein in each cell lysate is Western blotted using anti-c-Fos antibody. As a result, it was shown that the amount of c-Fos protein decreased under high-density conditions (FIG. 19B).
- osteoclast precursor cells are cultured at a normal density and in the presence or absence of L-serine. Induction of osteoclasts was performed. 48 o'clock After interculture, Western blotting was performed using anti-c Fos antibody or anti-NFAT2 antibody to detect the protein expression of c-Fos and NFAT2. As a result, the expression of c Fos and NFAT2 decreased in the absence of L-serine, and it was confirmed in bone marrow cells reflecting the living body by the ability to express these two molecules SL serine dependence. ( Figure 20C).
- the method of the present invention is useful as a method for preventing or treating NFAT2-related diseases.
- the medicament of the present invention can be used for various diseases related to NFAT2, such as osteoporosis, autoimmune arthritis, Paget's disease or rheumatoid arthritis, and various osteopenic diseases and bone sclerosis diseases such as marble bone disease, Alternatively, it is useful as a drug with few side effects on immune diseases and the like.
- the screening method of the present invention is useful for searching for novel NFAT2 expression regulators.
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WO2011030903A1 (ja) * | 2009-09-14 | 2011-03-17 | 株式会社資生堂 | 紫外線障害軽減組成物 |
JP2012522994A (ja) * | 2009-04-01 | 2012-09-27 | コルゲート・パーモリブ・カンパニー | 軟組織疾患の診断のための、および口腔ケア介入のための療法的標的としてのタンパク質バイオマーカー |
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WO2008044378A1 (fr) * | 2006-10-11 | 2008-04-17 | Oriental Yeast Co., Ltd. | Réactif contenant une protéine fusionnée de rankl soluble avec un marqueur d'épitope |
JP5191390B2 (ja) * | 2006-10-11 | 2013-05-08 | オリエンタル酵母工業株式会社 | 可溶型ranklとエピトープタグの融合タンパク質を含む試薬 |
JP2012522994A (ja) * | 2009-04-01 | 2012-09-27 | コルゲート・パーモリブ・カンパニー | 軟組織疾患の診断のための、および口腔ケア介入のための療法的標的としてのタンパク質バイオマーカー |
WO2011030903A1 (ja) * | 2009-09-14 | 2011-03-17 | 株式会社資生堂 | 紫外線障害軽減組成物 |
CN116139119A (zh) * | 2021-11-19 | 2023-05-23 | 北京大学口腔医学院 | 用于防治骨质疏松的丝氨酸制剂及其应用 |
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