WO2022075294A1 - 関節治療用細胞製剤の製造方法、関節治療用細胞製剤および間葉系幹細胞の培養方法 - Google Patents
関節治療用細胞製剤の製造方法、関節治療用細胞製剤および間葉系幹細胞の培養方法 Download PDFInfo
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/06—Animal cells or tissues; Human cells or tissues
- C12N5/0602—Vertebrate cells
- C12N5/0652—Cells of skeletal and connective tissues; Mesenchyme
- C12N5/0662—Stem cells
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K35/00—Medicinal preparations containing materials or reaction products thereof with undetermined constitution
- A61K35/12—Materials from mammals; Compositions comprising non-specified tissues or cells; Compositions comprising non-embryonic stem cells; Genetically modified cells
- A61K35/28—Bone marrow; Haematopoietic stem cells; Mesenchymal stem cells of any origin, e.g. adipose-derived stem cells
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P19/00—Drugs for skeletal disorders
- A61P19/02—Drugs for skeletal disorders for joint disorders, e.g. arthritis, arthrosis
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/06—Animal cells or tissues; Human cells or tissues
- C12N5/0602—Vertebrate cells
- C12N5/0652—Cells of skeletal and connective tissues; Mesenchyme
- C12N5/0662—Stem cells
- C12N5/0663—Bone marrow mesenchymal stem cells (BM-MSC)
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/06—Animal cells or tissues; Human cells or tissues
- C12N5/0602—Vertebrate cells
- C12N5/0652—Cells of skeletal and connective tissues; Mesenchyme
- C12N5/0662—Stem cells
- C12N5/0668—Mesenchymal stem cells from other natural sources
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2500/00—Specific components of cell culture medium
- C12N2500/30—Organic components
- C12N2500/32—Amino acids
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2500/00—Specific components of cell culture medium
- C12N2500/30—Organic components
- C12N2500/38—Vitamins
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2501/00—Active agents used in cell culture processes, e.g. differentation
- C12N2501/10—Growth factors
- C12N2501/115—Basic fibroblast growth factor (bFGF, FGF-2)
Definitions
- the present invention relates to a method for producing a cell preparation for joint treatment and a method for culturing mesenchymal stem cells, which comprises culturing mesenchymal stem cells in a medium containing a predetermined component.
- the present invention further relates to a cell preparation for joint treatment produced by the above method.
- articular cartilage injury and meniscus injury are frequently seen as subjects of daily medical practice and are widely recognized as diseases with a large number of patients.
- articular cartilage injury or meniscus injury occurs, it causes joint pain, reduced range of motion, knee effusion, and impaired movement.
- Patients with traumatic articular cartilage or meniscus injuries are usually treated by an orthopedic surgeon.
- Surgical treatment for cartilage and meniscus injuries aims to remove debris that further exacerbates the joint and restore the function of the affected joint.
- cartilage and meniscal tissue are difficult to self-regenerate.
- Non-Patent Document 1 it has been reported that mesenchymal stem cells derived from the synovial membrane have higher proliferative ability and cartilage forming ability than mesenchymal stem cells derived from various mesenchymal tissues such as bone marrow.
- Patent Document 2 disclose a method for treating articular cartilage injury and meniscus injury using synovial membrane-derived mesenchymal stem cells.
- karyotype abnormalities may occur in the cell culture process in stem cells including mesenchymal stem cells.
- stem cells including mesenchymal stem cells.
- self-serum when used for self-treatment, it is necessary to reduce the amount of serum because there is a limit to the amount of serum that can be collected.
- the present invention is a method for producing a cell preparation for joint treatment and a mesenchymal system capable of improving the proliferation ratio of cells, reducing the required serum volume, and suppressing karyotype abnormalities in the culture process. It is an object to be solved to provide a method for culturing stem cells and a cell preparation for joint treatment produced by the above method.
- the present inventor has found that the above problems can be solved by culturing mesenchymal stem cells in a medium containing an ascorbic acid derivative, alanyl glutamine and pyridoxine.
- the present invention has been completed based on the above findings.
- ⁇ 1> A method for producing a cell preparation for joint treatment, which comprises culturing mesenchymal stem cells in a medium containing an ascorbic acid derivative, alanylglutamine and pyridoxine.
- ⁇ 2> The method according to ⁇ 1>, wherein the mesenchymal stem cells are synovial membrane-derived mesenchymal stem cells.
- ⁇ 3> The method according to ⁇ 1> or ⁇ 2>, wherein the mesenchymal stem cells are autologous.
- ⁇ 4> The method according to any one of ⁇ 1> to ⁇ 3>, wherein the medium contains allogeneic serum.
- ⁇ 5> The method according to any one of ⁇ 1> to ⁇ 4>, wherein the medium does not contain ascorbic acid.
- ⁇ 6> The method according to any one of ⁇ 1> to ⁇ 5>, wherein the medium contains any one or more of biotin and lipoic acid.
- ⁇ 7> The method according to any one of ⁇ 1> to ⁇ 6>, wherein the mesenchymal stem cells are cultured using a multi-layer flask having five or more layers.
- ⁇ 8> Further comprising separating the suspension of the tissue containing the mesenchymal stem cells into two layers, an upper layer and a lower layer, and collecting the lower layer of the above two layers.
- the mesenchymal stem cells are human mesenchymal stem cells, the number of chromosomes of the mesenchymal stem cells is 46, and the chromosome cariotyping is a pair of chromosomes 1 to 22 and XX or XY chromosomes.
- the cell preparation for joint treatment according to any one of ⁇ 9> to ⁇ 11>.
- a method for culturing mesenchymal stem cells which comprises collecting the lower layer of the above two layers and culturing the mesenchymal stem cells contained in the lower layer in a medium containing an ascorbic acid derivative, alanylglutamine and pyridoxine.
- the mesenchymal stem cells are synovial membrane-derived mesenchymal stem cells.
- the mesenchymal stem cells are of autologous origin.
- the medium contains allogeneic serum.
- ⁇ 17> The method according to any one of ⁇ 13> to ⁇ 16>, wherein the medium does not contain ascorbic acid.
- ⁇ 18> The method according to any one of ⁇ 13> to ⁇ 17>, wherein the medium contains any one or more of biotin and lipoic acid.
- ⁇ 19> The method according to any one of ⁇ 13> to ⁇ 18>, wherein the mesenchymal stem cells are cultured using a multi-layer flask having five or more layers.
- ⁇ 20> A cell preparation for joint treatment containing mesenchymal stem cells cultured by the method according to any one of ⁇ 13> to ⁇ 19>.
- ⁇ 21> The cell preparation for joint treatment according to ⁇ 20>, which does not contain extracellular matrix or scaffold.
- the mesenchymal stem cells are human mesenchymal stem cells, the number of chromosomes of the mesenchymal stem cells is 46, and the chromosome cariotyping is a pair of chromosomes 1 to 22 and XX or XY chromosomes.
- ⁇ A> A step of transplanting a joint therapeutic cell preparation produced by the method of the present invention or mesenchymal stem cells cultured by the method of the present invention so as to cover the cartilage damaged part or the mesenchymal plate damaged part with the mesenchymal stem cells; And the step of regenerating cartilage tissue in situ at the cartilage injured or meniscus injured by differentiating mesenchymal stem cells into chondrocytes; How to treat joints, including.
- the proliferation ratio when a sufficient amount of cells are produced from a tissue, the proliferation ratio can be improved, the required serum amount can be reduced, and karyotype abnormality can be suppressed in the culture process.
- FIG. 1 shows the growth curve of mesenchymal stem cells when using type medium or medium A.
- FIG. 2 shows karyotype analysis of mesenchymal stem cells when using type medium or medium A.
- FIG. 2 shows karyotype analysis of mesenchymal stem cells when bFGF is added to a type medium or medium A is used.
- FIG. 4 shows images of medial menisci of both knee joints removed from rats treated with rat synovial-derived mesenchymal stem cells (rSMSC) or PBS.
- rSMSC synovial-derived mesenchymal stem cells
- the present invention relates to a method for producing a cell preparation for joint treatment, which comprises culturing mesenchymal stem cells in a medium containing an ascorbic acid derivative, alanylglutamine and pyridoxin.
- a method for producing a cell preparation for joint treatment which comprises culturing mesenchymal stem cells in a medium containing an ascorbic acid derivative, alanylglutamine and pyridoxin.
- the method for producing a cell preparation for joint treatment according to the present invention is to culture mesenchymal stem cells in a medium containing an ascorbic acid derivative, alanylglutamine and pyridoxin, and to treat the joints using the mesenchymal stem cells cultured above. It may include producing a cell preparation for use.
- the mesenchymal stem cell is a group of stem cells or precursor cells capable of differentiating into all or some of the mesenchymal cells such as osteoblasts, chondroblasts, lipoblasts, and muscle cells.
- Mesenchymal stem cells are known to be present in bone marrow, synovium, periosteum, adipose tissue, and muscle tissue.
- BMP bone morphogenetic protein
- TGF- ⁇ Transforming growth factor- ⁇
- Mesenchymal stem cells can detect and confirm molecules characteristic of mesenchymal stem cells, such as enzymes, receptors, and low molecular weight compounds.
- Examples of the molecule characteristic of mesenchymal stem cells include, but are not limited to, cell surface markers (positive markers) such as CD73, CD90, CD105, and CD166.
- Examples of negative markers that are not expressed in mesenchymal stem cells include, but are not limited to, CD19, CD34, CD45, HLA-DR, CD11b, and CD14.
- CD is an abbreviation for Crusters of differentiation
- HLA-DR is an abbreviation for human leukocyte antigen-D-related.
- the animal species from which the mesenchymal stem cells are derived is not particularly limited, and for example, rodents such as rats, mice, hamsters and guinea pigs, rabbits such as rabbits, hoofed eyes such as pigs, cows, goats and sheep, and dogs. , Cats such as cats, and cells such as humans, monkeys, red-tailed monkeys, marmosets, orangutans, and primates such as chimpanzees.
- the mesenchymal stem cells are preferably human mesenchymal stem cells.
- mesenchymal stem cells are not particularly limited, but is preferably derived from synovium, bone marrow, fat, dental pulp, fetus, or induced pluripotent stem cells.
- the mesenchymal stem cells are more preferably synovial-derived mesenchymal stem cells or bone marrow-derived mesenchymal stem cells, and even more preferably synovial-derived mesenchymal stem cells.
- the mesenchymal stem cells may be either autologous or allogeneic, but are preferably autologous.
- the mesenchymal stem cell may be a gene-modified cell or a non-gene-modified cell, but is preferably a non-gene-modified cell.
- Mesenchymal stem cells can be collected from the above tissues by a conventional method.
- the mesenchymal stem cells can be collected by separating the suspension of the tissue containing the mesenchymal stem cells into two layers, an upper layer and a lower layer, and by collecting the lower layer of the above two layers. .. Separation of a suspension of tissue containing mesenchymal stem cells into two layers, an upper layer and a lower layer, can be performed, for example, by centrifugation.
- synovial tissue can be harvested from the unloaded portion of the joint under anesthesia.
- the amount of synovial tissue collected can be determined in consideration of the type of donor or the amount of synovial-derived mesenchymal stem cells required. For example, 0.1 g to 10 g, preferably 0.1 g to 2.0 g, more preferably 0.1 g to 1.5 g, still more preferably 0.1 g to 1.0 g from synovial tissue to synovial-derived mesenchymal system.
- Stem cells can be obtained.
- the collected synovial tissue is shredded with scissors or the like as necessary, and then subjected to enzyme treatment.
- the enzyme is not particularly limited as long as it is an enzyme containing a protease, but is preferably a mixed enzyme containing one or more collagenases and one or more neutral proteases.
- a particularly preferred enzyme is liberase.
- liberase MNP-S manufactured by Roche
- the enzyme concentration in the enzyme treatment is preferably 0.01 mg / ml to 10 mg / ml, more preferably 0.1 mg / ml to 10 mg / ml, and even more preferably 0.5 mg / ml to 10 mg / ml.
- the mass ratio of synovial tissue to the enzyme is preferably 1000: 1 to 10: 1, more preferably 500: 1 to 20: 1, and even more preferably 200: 1 to 40: 1.
- the enzymatic reaction can be carried out at a temperature of preferably 15 ° C to 40 ° C, more preferably 20 ° C to 40 ° C.
- the reaction time may be 30 minutes or more, preferably 2 hours or more, more preferably 2 hours 30 or more, still more preferably 3 hours or more.
- the upper limit of the reaction time is not particularly limited, but is generally within 4 hours.
- the enzyme-treated mixture contains synovial-derived mesenchymal stem cells.
- the enzyme-treated mixture can be transferred to a centrifuge tube through a cell strainer and centrifuged to recover synovial-derived mesenchymal stem cells.
- the medium used in the present invention preferably contains essential amino acids. That is, the medium preferably contains histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan and valine.
- the concentration of essential amino acids in the medium is not particularly limited, but the concentration of each essential amino acid is preferably 0.003 mmol / L or more, more preferably 0.005 mmol / L or more, and 0.01 mmol / L or more. Is more preferable.
- the upper limit is generally 5 mmol / L or less.
- the total concentration of essential amino acids is preferably 0.5 mmol / L or more, more preferably 1 mmol / L or more, and even more preferably 1.5 mmol / L or more.
- the upper limit is generally 15 mmol / L or less.
- the medium preferably contains non-essential amino acids and the like.
- the non-essential amino acid and the like have the meaning of defining non-essential amino acids and glutamines.
- non-essential amino acids include one or more selected from the group consisting of glycine, alanine, arginine, aspartic acid, aspartic acid, cysteine, cystine, glutamines, glutamic acid, proline, serine and tyrosine.
- each of these is 0.005 mmol / L (5 ⁇ mol / L) or more, and 0. It is preferably 01 mmol / L or more, and more preferably 0.05 mmol / L or more.
- the upper limit is generally 3 mmol / L or less.
- Preferred glutamines include alanyl glutamine.
- the medium used in the present invention contains alanyl glutamine as an essential component.
- the total concentration of non-essential amino acids other than alanyl glutamine is preferably 0.5 mmol / L or more, more preferably 1.5 mmol / L or more, and more preferably 2.5 mmol / L or more. More preferred.
- the upper limit is generally 30 mmol / L or less.
- the concentration of alanyl glutamine is preferably 0.5 mmol / L or more, more preferably 1.0 mmol / L or more, and even more preferably 1.5 mmol / L or more.
- the upper limit is generally 10 mmol / L or less.
- the medium is preferably glutamine-free. Not included here means that it is not substantially contained in relation to the effect of the present invention, and does not mean to exclude inevitably mixed substances. Examples that are not substantially included are usually less than 5 ⁇ 10-5 mmol / L, preferably 0 mmol / L.
- Amino acid detection and measurement method may be a known method, and for example, amino acid quantification by high performance liquid chromatography (HPLC) and amino acid analysis method by ninhydrin method (for example, Clinical Chemistry (1997), Vol. 43, No. 8, p1421-1428) and the like.
- HPLC high performance liquid chromatography
- ninhydrin method for example, Clinical Chemistry (1997), Vol. 43, No. 8, p1421-1428
- the amino acid described in the present specification may be any of L-form, D-form, and DL-form. Further, the amino acid may form a salt as well as a free form.
- the salt form include acid addition salts and salts with bases.
- the acid include inorganic acids such as hydrogen chloride, hydrogen bromide, sulfuric acid and phosphoric acid, and organic acids such as acetic acid, lactic acid, citric acid, tartaric acid, maleic acid, fumaric acid and monomethylsulfuric acid.
- Examples of the base forming such a salt include hydroxides or charcoal oxides of metals such as sodium, potassium and calcium, inorganic bases such as ammonia, ethylenediamine, propylenediamine, ethanolamine and monoalkylethanolamine. , Dialkylethanolamine, diethanolamine, triethanolamine and other organic bases.
- the salt may be a hydrate (hydrous salt).
- the medium contains pyridoxine.
- the medium may contain biotin.
- the medium may further contain at least one other vitamin, in addition to pyridoxine and biotin.
- Other vitamins include vitamin B12, choline chloride, calcium pantothenate, folic acid, niacinamide, pyridoxals (excluding pyridoxine), riboflavin, thiamine hydrochloride and i-inositol.
- pyridoxals include pyridoxals.
- the above-mentioned pyridoxine, biotin, and at least one other vitamin may form a salt as well as a free form.
- the salt form include acid addition salts and salts with bases. Specifically, the above-mentioned amino acids can be mentioned.
- the concentration of pyridoxine, biotin and at least one other vitamin in the medium is preferably 0.00005 mmol / L or more, more preferably 0.0001 mmol / L or more, and 0.0002 mmol, respectively. It is more preferably / L or more.
- the upper limit is generally 1 mmol / L or less.
- the total concentration of vitamins in the medium is preferably 0.001 mmol / L or more, more preferably 0.005 mmol / L or more, and even more preferably 0.01 mmol / L or more.
- the upper limit is generally 2 mmol / L or less.
- the medium is preferably pyridoxal or pyridoxals (excluding pyridoxines). Not included here means that it is not substantially contained in relation to the effect of the present invention, and does not mean to exclude inevitably mixed substances. As an example substantially free of pyridoxal, it is usually less than 5 ⁇ 10-5 mmol / L, preferably 0 mmol / L.
- the medium preferably contains at least one inorganic salt.
- the inorganic salt is preferably one or more selected from the group consisting of calcium chloride, magnesium sulfate, potassium chloride, sodium hydrogen carbonate, sodium chloride and sodium dihydrogen phosphate.
- the concentration of the inorganic salt is not particularly limited, but is preferably 10 mmol / L or more, more preferably 50 mmol / L or more, and further preferably 80 mmol / L or more in total.
- the upper limit is generally 1,000 mmol / L or less.
- the medium preferably contains at least one of saccharides and pyruvate.
- saccharides include D-glucose.
- pyruvate include sodium pyruvate.
- the total concentration of the saccharide and pyruvate is preferably 0.1 mmol / L or more, more preferably 0.3 mmol / L or more, and further preferably 1 mmol / L or more.
- the upper limit is generally 50 mmol / L or less.
- the medium preferably contains lipoic acid.
- the concentration of lipoic acid is preferably 5 ⁇ 10-5 mmol / L or more, more preferably 0.0001 mmol / L or more, and even more preferably 0.0005 mmol / L or more.
- the upper limit is generally 0.005 mmol / L or less.
- the medium used in the present invention contains an ascorbic acid derivative instead of ascorbic acid.
- the ascorbic acid derivative include ascorbic acid-2-phosphate, ascorbic acid-2-phosphate ester trisodium, ascorbic acid-2-phosphate ester magnesium salt, and ascorbic acid-2-glycoside, and these groups.
- One type may be selected from the above and used, or two or more types may be combined. It is preferable to use ascorbic acid-2-phosphate ester trisodium.
- the medium used in the present invention preferably does not contain ascorbic acid.
- the present invention it is important to include an ascorbic acid derivative instead of ascorbic acid. It is considered that the stability as a medium was improved by using an ascorbic acid derivative instead of the unstable ascorbic acid.
- the total concentration of the ascorbic acid derivative is preferably 0.03 mmol / L or more, more preferably 0.1 mmol / L or more, and 0.14 mmol / L or more. It is more preferable to have.
- the upper limit is preferably 5.0 mmol / L or less, more preferably 1.0 mmol / L or less, and further preferably 0.57 mmol / L or less.
- the medium is preferably free of linoleic acid. Furthermore, the medium is preferably free of nucleic acids. Not included here means that it is not substantially contained in relation to the effect of the present invention, and does not mean to exclude inevitably mixed substances. As an example substantially free of ascorbic acid, it is usually less than 5 ⁇ 10-5 mmol / L, preferably 0 mmol / L. In the case of linoleic acid, it is usually less than 0.0015 mmol / L, preferably 0.001 mmol / L or less, more preferably 0.0005 mmol / L or less, still more preferably 0.0003 mmol / L or less.
- nucleic acid it is usually less than 5 ⁇ 10-5 mmol / L, preferably 0 mmol / L.
- Mesenchymal stem cells are differentiated into chondrocytes by culturing them in a chondrogenic medium supplemented with transforming growth factor ⁇ 3 (TGF- ⁇ 3), dexamethasone, and bone formation factor 2 (BMP-2), and in vitro. It is known that it is possible to produce cartilage tissue. Therefore, in order to prevent mesenchymal stem cells from differentiating into chondrocytes, the medium is preferably free of TGF- ⁇ 3, dexamethasone, and BMP-2.
- TGF- ⁇ 3 transforming growth factor ⁇ 3
- dexamethasone dexamethasone
- BMP-2 bone formation factor 2
- substantially free of TGF- ⁇ 3 it is usually less than 0.1 ng / mL, preferably 0 ng / mL.
- dexamethasone it is usually less than 1.0 nmol / L, preferably 0 nmol / L.
- BMP-2 it is usually less than 0.1 ng / mL, preferably 0 ng / mL.
- the medium is preferably free of insulin, transferrin, selenous acid and BSA (bovine serum albumin). Not included here means that it is not substantially contained, and does not mean that those inevitably mixed are excluded. Insulin is usually not included as an example. It is less than 10 ng / mL, preferably 0 ng / mL. In the case of transferrin, it is usually less than 10 ng / mL, preferably 0 ng / mL. In the case of selenous acid, it is usually less than 0.01 ng / mL, preferably 0 ng / mL. In the case of BSA, it is usually less than 10 ⁇ g / mL, preferably 0 ⁇ g / mL.
- BSA bovine serum albumin
- the medium may contain phenol red.
- concentration of phenol red is preferably 0.001 mmol / L or more, more preferably 0.005 mmol / L or more, and even more preferably 0.01 mmol / L or more.
- the upper limit is generally 0.2 mmol / L or less.
- the medium may be a medium containing serum or a medium not containing serum.
- the lower limit of the amount of serum in the medium containing serum is preferably 2% by volume or more, more preferably 5% by volume or more, and further preferably 10% by volume or more.
- the upper limit is generally 20% by volume or less.
- serum examples include animal-derived serum, but human serum is preferable.
- the serum may be allogeneic serum or heterologous serum, but is preferably allogeneic serum. That is, when producing mesenchymal stem cells from human tissue for the purpose of administration to humans, a medium containing human serum may be used. When allogeneic serum is used, it may be autologous serum or allogeneic atypical serum, but it is preferably autologous serum.
- the medium may further contain an antibiotic.
- the antibiotic include streptomycin, gentamicin (gentamicin sulfate and the like), penicillin, amphotericin B and the like.
- the total concentration of the antibiotic is preferably 0.1 mg / L or more, more preferably 0.5 mg / L or more, and further preferably 10.0 mg / L or more.
- the upper limit is generally 1000 mg / L or less.
- the medium may contain known additives, if necessary, in addition to the above-mentioned components.
- the additive include polyamines (for example, putrescine and the like), reducing agents (for example, 2-mercaptoethanol and the like), buffers (for example, HEPES (4- (2-hydroxyethyl) -1-piperazinethalphonic acid) and the like) and the like. Be done.
- the incubator used for culturing mesenchymal stem cells is not particularly limited as long as it is capable of culturing mesenchymal stem cells, but is limited to a flask, a tissue culture flask, a dish, a petri dish, a tissue culture dish, and a multi-dish. , Microplates, microwell plates, multiplates, multiwell plates, microslides, chamber slides, petri dishes, tubes, trays, culture bags, and roller bottles.
- mesenchymal stem cells may be preferably cultured using a multi-layer flask having 5 or more layers (for example, 5 to 10 layers).
- a 10-cell stack polystyrene cell stack-10 chamber, manufactured by Corning
- a flask provided with a vent cap can also be used.
- the incubator may be cell-adhesive or non-cell-adhesive, and is appropriately selected according to the purpose.
- the cell-adhesive incubator can be coated with any cell-supporting substrate such as extracellular matrix (ECM) for the purpose of improving the adhesion of the surface of the incubator to cells.
- ECM extracellular matrix
- the cell-supporting substrate can be any substance intended for adhesion of mesenchymal stem cells, such as Matrigel using ECM, collagen, gelatin, poly-L-lysine, poly-D-lysine, laminin, fibronectin, etc. Can be mentioned.
- Culture conditions can be set as appropriate.
- the culture temperature is not particularly limited, but may be about 30 to 40 ° C, preferably about 37 ° C.
- the CO 2 concentration can be about 1-10%, preferably about 2-5%.
- the oxygen concentration can be 1-20%, preferably 1-10%.
- the culture period of mesenchymal stem cells is preferably 5 days or more, 7 days or more, 10 days or more, and 10 to 100 days, 10 to 90 days, 10 to 80 days, 10 to 70 days, 10 to It may be 60 days, 10-50 days, 10-40 days, 10-30 days, 10-28 days, 10-21 days, or 10-14 days.
- the culture period of synovial membrane-derived mesenchymal stem cells is preferably 5 days or longer, 7 days or longer, and 10 days or longer, preferably 10 to 100 days, 10 to 90 days, 10 to 80 days, and 10 to 70 days. It may be 10 to 60 days, 10 to 50 days, 10 to 40 days, 10 to 30 days, 10 to 28 days, 10 to 21 days, or 10 to 14 days.
- mesenchymal stem cells have a decrease in in situ cartilage forming ability in inverse proportion to the number of passages of mesenchymal stem cells in vitro. Therefore, in order to prepare undifferentiated mesenchymal stem cells, the number of passages is preferably 10 or less, more preferably 5 passages or less, and the mesenchymal stem cells in the primary or first passage are used. It is more preferable to manufacture. It is also known that synovial-derived mesenchymal stem cells have a decrease in in-situ cartilage-forming ability in inverse proportion to the number of passages of synovial-derived mesenchymal stem cells in vitro. Therefore, in order to prepare undifferentiated synovial membrane-derived mesenchymal stem cells, the number of passages is preferably 10 or less, and more preferably 5 or less.
- the present invention is based on the present invention. Separating a suspension of tissue containing mesenchymal stem cells into two layers, an upper layer and a lower layer, Collecting the lower layer of the above two layers and culturing the mesenchymal stem cells contained in the lower layer in a medium containing ascorbic acid-2-phosphate ester trisodium, alanylglutamine and pyridoxine,
- the present invention relates to a method for culturing mesenchymal stem cells. Specific examples and preferred embodiments of the mesenchymal stem cells, the medium, and the culture method in the above-mentioned method for culturing mesenchymal stem cells according to the present invention are as described above in the present specification.
- a cell preparation for joint treatment produced by the cell preparation for joint treatment according to the present invention is provided.
- the present invention further provides a cell preparation for joint treatment containing mesenchymal stem cells cultured by the method for culturing mesenchymal stem cells according to the present invention.
- the cell preparation for joint treatment does not contain extracellular matrix or scaffold.
- extracellular matrix or scaffold examples include collagen, hyaluronic acid, alginic acid, polylactic acid, and polyglycolic acid.
- the mesenchymal stem cells used as an active ingredient in a cell preparation for joint treatment are preferably cells that do not contain karyotype abnormalities.
- the number of chromosomes of the mesenchymal stem cells is 46, and the chromosome cariotyping is a pair of chromosomes 1 to 22.
- a cell that is an XX chromosome or an XY chromosome can be mentioned.
- the ratio of normal cells not containing the above-mentioned karyotype abnormality is preferably higher than 90%, more preferably 91% or more. , More preferably 93% or more, further preferably 95% or more, even more preferably 98% or more, particularly preferably 99% or more, and most preferably 100%.
- Joint treatment may include treatment of joint damage, damage or inflammation, including treatment of joint disease resulting from degeneration and / or inflammation of connective tissues such as cartilage, or non-inflammatory joint disease.
- Joint treatments include, for example, meniscus injury, traumatic cartilage injury, transected osteochondritis, aseptic osteonecrosis, osteoarthritis, rheumatoid arthritis (eg, chronic rheumatoid arthritis), gout, reactive arthritis, etc.
- Treatment of diseases selected from the group consisting of psoriatic arthritis, juvenile arthritis, inflammatory arthritis, and articular cartilage defects can be mentioned, but is not limited to these diseases.
- the osteoarthritis may be a osteoarthritis of the knee in which the joint site is the knee, or the joint site may be an elbow joint, a finger joint, a hip joint, a shoulder joint, an ankle joint, or a cervical spine. It may be a combination of joint parts.
- the cell preparation for joint treatment of the present invention is preferably a meniscus therapeutic agent or an osteoarthritis therapeutic agent.
- the mesenchymal stem cells may be mixed with a pharmaceutically acceptable carrier by a conventional method to prepare a preparation suitable for administration to an individual.
- a pharmaceutically acceptable carrier include distilled water for injection made isotonic by adding physiological saline, glucose and other adjuvants (for example, D-sorbitol, D-mannitol, sodium chloride, etc.).
- buffers eg, phosphate buffer, sodium acetate buffer
- soothing agents eg, benzalkonium chloride, prokine hydrochloride, etc.
- stabilizers eg, human serum albumin, polyethylene glycol, etc.
- Agents, antioxidants and the like may be blended.
- the present invention further relates to a method of treating a joint. More specifically, the present invention relates to meniscus injuries, traumatic cartilage injuries, transected osteochondritis, aseptic osteonecrosis, and osteoarthritis of the knee (eg, osteoarthritis of the knee in which the joint site is the knee).
- Joint parts are elbow joint, finger joint, hip joint, shoulder joint, ankle joint, cervical spine, combination of multiple joint parts), rheumatoid arthritis (eg, chronic joint rheumatoid arthritis), gout, reactive arthritis, psoriatic arthritis, juvenile
- the present invention relates to a method for treating a disease selected from the group consisting of arthritis, inflammatory arthritis, and articular cartilage defect.
- the method for treating joints of the present invention The step of transplanting the joint therapeutic agent of the present invention so as to cover the cartilage damaged part or the mesenchymal stem cell with the mesenchymal stem cell; and by differentiating the mesenchymal stem cell into the chondrocyte, the cartilage damaged part or the meniscus is damaged.
- the cartilage injured part or the meniscus injured part is covered with the mesenchymal stem cells.
- Transplantation of mesenchymal stem cells can be performed by open surgery or arthroscopic surgery. In order to minimize the invasion, it is preferable to transplant mesenchymal stem cells under arthroscopy.
- the cartilage damaged part or the meniscus damaged part may be covered with a suspension of mesenchymal stem cells or may be covered with a cell sheet of mesenchymal stem cells.
- Mesenchymal stem cells have a high ability to adhere to cartilage injured areas and meniscus injured areas.
- the minimally invasive procedure of the present invention is characterized by covering the cartilage injury site with mesenchymal stem cells, and the following steps: Hold the position so that the cartilage injury is facing upwards; Placing a cell sheet of mesenchymal stem cells, a suspension of mesenchymal stem cells, or a gel-like substance containing mesenchymal stem cells on the surface of the cartilage injury; To adhere mesenchymal stem cells to the surface of the cartilage injury site; including.
- the minimally invasive procedure of the present invention is characterized by covering the injured part of the meniscus with mesenchymal stem cells, and the following steps: Hold the position so that the injured part of the meniscus faces down; Injecting a suspension of mesenchymal stem cells into the knee joint; and maintaining a specific time position to allow mesenchymal stem cells to adhere to the injured meniscus; including.
- the transplanted mesenchymal stem cells are placed on the surface of the cartilage or meniscus tear for at least 10 minutes, preferably 15 minutes. , It is preferable to hold. To achieve this, position at least 10 for the purpose of turning the cartilage or meniscus tear upwards and retaining the mesenchymal stem cells in the upwardly oriented cartilage or meniscus tears. Hold for minutes, preferably 15 minutes.
- the cartilage-damaged part and meniscus-damaged part with mesenchymal stem cells can be covered with a bone membrane to further strengthen the adhesion of the mesenchymal stem cells to the cartilage-damaged part or meniscus-damaged part.
- Surgery is completed after holding mesenchymal stem cells on the surface of the cartilage injured or meniscal injured for at least 10 minutes.
- the transplanted mesenchymal stem cells differentiate into chondrocytes at the cartilage damaged part and the meniscus damaged part, and regenerate the cartilage tissue in situ at the cartilage damaged part or the meniscus damaged part.
- cartilage tissue regenerates according to the local microenvironment (nutrition supply, cytokine environment, etc.), so no external manipulation is required.
- cartilage tissue is regenerated at the cartilage injured or meniscus injured to repair the injury and, in the case of cartilage injury, the bone region, cartilage and bone.
- the border with the cartilage, the center of the cartilage, the surface area, and the area adjacent to the original cartilage are formed as the original cartilage tissue, or in the case of meniscus tear, the meniscus cartilage is formed.
- Basic medium type Basic medium Thermo Fisher Scientific MEM alpha no nucleosides (model number: 12561)
- Basic medium A A medium in which ascorbic acid, glutamine, and pyridoxal in the type medium are replaced with ascorbic acid-2-phosphate disodium, alanylglutamine, and pyridoxine, respectively.
- Table 1 shows the medium composition of the type basal medium and basal medium A.
- bFGF fiblast spray 250 (Kaken Pharmaceutical Co., Ltd.) dissolved in water for injection and prepared to 10 ⁇ g / mL
- type medium + bFGF bFGF
- bFGF is an abbreviation for basic fibroblast growth factor.
- a tissue suspension of purchased human myeloid tissue (lots: B009, B012) is centrifuged at 1,000 rpm for 10 minutes to separate into two layers. The lower layer is collected and used. In this lower layer, plasma-removed material, type medium, medium A, or type medium + bFGF was added in an amount 10 times that before plasma removal, and seeded in a flask so as to be 0.20 mL / cm 2 . Culturing was carried out in an incubator at 37 ° C. and a 5% CO 2 atmosphere.
- the medium was exchanged every 3 or 4 days, and the cells were cultured for 12 to 13 days after sowing, and then exfoliated with a 0.05% trypsin-EDTA solution (hereinafter, trypsin, Life Technologies model number: 25300). After exfoliation, trypsin was neutralized with an equal amount of medium and transferred to a separately prepared tube. The culture flask was further washed with an equal amount of medium, added to the above tube, and the remaining cells were collected. The tube was centrifuged at 200 xg for 5 minutes and the supernatant was removed. An appropriate amount of medium was added to the remaining pellets, and cell counting was performed using a hemocytometer.
- trypsin-EDTA solution hereinafter, Life Technologies model number: 25300
- the seeds were seeded in flasks so that the final concentration was 0.20 to 0.50 ⁇ 10 4 cells / cm 2 , and cultured in an incubator at 37 ° C. in a 5% CO 2 atmosphere.
- the cells were cultured for 3 or 4 days, and when 60% or more of the bottom surface of the flask was filled with cells, the passage was repeated in the same manner as described above.
- the cells at the end of the 9th passage, and in the case of B012, the cells at the end of the 4th passage are centrifuged so that the final concentration is 10% (v / v) dimethyl sulfoxide (SIGMA-ALDRICH model number: D2650).
- SIGMA-ALDRICH model number: D2650 dimethyl sulfoxide
- FIG. 1 shows a comparison of growth curves represented by population doubling values.
- the population doubling value (PDL) indicates the number of cell divisions and is calculated from the following formula.
- a growth curve was created by calculating PDL for each passage and accumulating it. Calculation formula of PDL: (Log (number of recovered cells) -Log (number of seeded cells)) / Log2
- Human bone marrow mesenchymal stem cells were obtained and cultured by the method described in [Experiment A].
- the synovial tissue collected from the knee of a mini pig was shredded with scissors and immersed in 5.0 mL of liberase solution.
- liberase solution 5.0 mg of Liberase MNP-S (manufactured by Roche) was dissolved in 5.0 mL of water for injection containing a final concentration of 20% fetal bovine serum (Nichirei Bioscience, model number: 174012). .. The enzymatic reaction was carried out at 37 ° C. for 3 hours.
- the tissue digestive juice was separated into two layers through a cell strainer, and the lower layer was transferred to a 50 mL centrifuge tube and centrifuged at 400 g for 5 minutes. The supernatant was removed, and the obtained cell-concentrated suspension was suspended in the medium.
- T-flask TPP cell culture flask 150 cm 2 filter cap model number: 90151
- 10-cell stack Corning cell stack 10-chamber cell culture surface treatment model number: 3270
- a cell suspension in which cells are suspended in the above-mentioned medium at a predetermined concentration is prepared so that the cell seeding density and the amount of the medium after seeding in the culture container become predetermined conditions, and the culture container according to (3).
- the seeding density means the number of cells to be seeded per unit area of the culture surface
- the medium amount means the medium volume per unit area of the culture surface.
- the porcine synovial mesenchymal stem cells were cultured in a type medium supplemented with 20% (v / v) FBS (fetal bovine serum).
- the cell seeding density was 1000, 1500 cells / cm 2 , the medium volume was 0.12 mL / cm 2 , and the culture vessel was a T-flask.
- the cells were collected and the growth rate was calculated for each.
- Table 2 shows the relative growth rate when the growth rate under the condition of a sowing density of 1000 seeds / cm 2 is 1.
- Table 4 shows the relative growth rate when the growth rate under the condition of a seeding density of 1000 cells / cm 2 when the type medium to which FBS was added was set to 1.
- medium A showed a high growth rate with respect to the type medium in the range of cell seeding density of 1000 to 1500 cells / cm 2 .
- Test 2 Comparison of growth rates due to differences in medium volume 1 Human bone marrow mesenchymal stem cells were cultured using type medium and medium A.
- Comparative Test 1 a medium in which 20% (v / v) of FBS was added to the type medium was used, and the medium amount was 0.12 mL / cm 2 .
- comparative test 2 a medium in which 20% (v / v) of FBS was added to the type medium was used, and the medium amount was 0.24 mL / cm 2 .
- Test 3 a medium in which 20% (v / v) of FBS was added to the medium A was used, and the medium amount was 0.12 mL / cm 2 .
- Test 4 a medium in which 20% (v / v) of FBS was added to the medium A was used, and the medium amount was 0.24 mL / cm 2 .
- the cells were collected and the proliferation rate was calculated on the 12th day after seeding under the conditions of Comparative Tests 1 and 2 and Tests 3 and 4.
- Table 5 shows the relative growth rate when the growth rate of the comparative test 1 is 1. It was found that the growth rate was improved by increasing the amount of the culture medium in both the type medium and the medium A.
- Test 3 Comparison of growth rates due to differences in medium volume 2 Pig synovial mesenchymal stem cells were cultured using type medium and medium A.
- a medium in which 20% (v / v) of FBS was added to the type medium was used, and the medium amount was 0.12 mL / cm 2 .
- a medium in which 20% (v / v) of FBS was added to the type medium was used, and the medium amount was 0.20 mL / cm 2 .
- test 13 a medium in which 20% (v / v) of FBS was added to medium A was used, and the medium amount was 0.12 mL / cm 2 .
- a medium in which 20% (v / v) of FBS was added to medium A was used, and the medium amount was 0.20 mL / cm 2 .
- the cells were collected and the proliferation rate was calculated on the 12th day after seeding under the conditions of comparative tests 11 and 12 and tests 13 and 14.
- Table 6 shows the relative growth rate when the growth rate of the comparative test 1 is 1. It was found that the growth rate was improved by increasing the amount of the culture medium in both the type medium and the medium A.
- Test 4 Evaluation of proliferation rate without increasing serum usage
- Pig synovial mesenchymal stem cells were cultured using type medium and medium A as basal medium.
- a medium in which 20% (v / v) of FBS was added to the type medium was used, and the medium amount was 0.12 mL / cm 2 .
- the comparative test 22 a medium in which 20% (v / v) of FBS was added to the medium A was used, and the medium amount was 0.12 mL / cm 2 .
- the cells were collected and the proliferation rate was calculated on the 12th day after seeding under the conditions of Test 21, Comparative Test 22, and Test 23.
- Table 7 shows the relative growth rate when the growth rate of test 21 is 1. In general, it is known that lowering the serum concentration lowers the growth rate. This is because serum concentration is believed to contribute most to cell proliferation. On the other hand, in Medium A, it was found that even if the amount of serum used was the same, the growth rate was unexpectedly improved by increasing the amount of basal medium and lowering the serum concentration.
- Test 5 Effect of serum concentration on proliferation rate Human bone marrow mesenchymal stem cells were cultured using type medium and medium A.
- a type medium supplemented with 20% (v / v) FBS was used, and the medium amount was 0.12 mL / cm 2 .
- a type medium supplemented with 10% (v / v) FBS was used so that the total amount of FBS used for culturing was the same as that of the test 31, and the medium amount was 0.24 mL / cm 2 .
- medium A supplemented with 10% (v / v) FBS was used so that the total amount of FBS used for culturing was the same as that of test 31, and the medium amount was 0.24 mL / cm 2 . bottom.
- the type medium even if the amount of serum used is the same, the growth rate decreases when the serum concentration decreases, but when medium A is used as the basal medium, the amount of basal medium is increased and the serum concentration is decreased, so that the type medium can be used.
- T-flask Effect of different culture vessels on proliferation rate
- a type medium and a medium A to which 20% (v / v) of FBS was added were used, and the amount of the medium was 0.12 mL / cm 2 .
- a type medium was used, and a T-flask and a 10-cell stack were used for culturing, respectively.
- Table 7 shows the relative growth rate of the 10-cell stack when the growth rate of the T flask was 1.
- type media was used, and T-flasks and 10-cell stacks were used for culturing, respectively.
- the growth rate after culturing in each culture vessel for 12 days was evaluated, and the relative growth rate of the 10-cell stack when the growth property of the T flask was set to 1 is shown in Table 9. It was found that when the culture vessel was changed from the T flask to the 10-cell stack, the growth rate decreased in the type medium, whereas the growth rate increased in the medium A.
- Test 7 Effect of cap morphology of culture vessel and presence / absence of forced aeration on proliferation rate
- a type medium and a medium A to which 20% (v / v) of FBS was added were used, and the amount of the medium was 0.12 mL / cm 2 .
- two caps of a 10-cell stack were compared with a standard filter cap and a change from a standard filter cap to a bent cap (transfer cap for Corning cell stack model number; 3281).
- the medium A was changed to a vent cap, and the one in which gas was forcibly aerated from the vent cap on one side was compared.
- the gas used for forced aeration was air containing 5% CO2, humidified to the same level as the incubator environment (relative humidity 100%) before introduction into the 10-cell stack, and the temperature was adjusted to 37 ° C.
- the cells were collected by culturing for 12 days under each culture condition, and the proliferation rate was calculated.
- Table 10 shows the relative growth rate when the growth result of the cells cultured in the T flask using the same amount of medium in the type medium was set to 1.
- the relative growth rate results indicating that the culture cannot be continued are those that did not reach the culture for 12 days because it was confirmed that the cells did not grow in the process of the culture.
- the growth rate was significantly improved by changing to a vent cap and forcibly ventilating the gas.
- Test 7 Establishment of rat synovial-derived stem cells and meniscal regeneration effect This test shows the ability of rat synovial-derived mesenchymal stem cells to regenerate the meniscus in the rat body.
- Six-week-old Lewis rats were used to establish synovial-derived mesenchymal stem cells.
- Synovial tissue collected under isoflurane anesthesia was collected from Fetal Bovine Serum (Gibco Cat. # 10270) to a concentration of 20% and Antibiotic-Antimycotic (100X) to a concentration of 1% (Thermorphisher Scientific Cat. ) was added to the basal medium A to a concentration of 3.0 mg / mL, Collagenase V (Sigma Cat.
- the cells were allowed to stand in an incubator at ° C for 5 minutes, the cells were collected as mesenchymal stem cells, and the number of cells was calculated with a living-dead cell autoanalyzer Vi-CELL (BECKMAN COOLTER, model number: 731050). The supernatant was discarded by centrifugation and replaced with COS-banker (Cat. # COS-CFM01 of Cosmo Bio Co., Ltd.) to prepare a frozen stock of cells.
- COS-banker Cat. # COS-CFM01 of Cosmo Bio Co., Ltd.
- a 10-week-old Lewis rat was used to create a meniscal injury model to evaluate the meniscal regeneration effect.
- knee joint skin was incised under isoflurane anesthesia to expose the knee joint.
- the medial joint capsule under the patella was exposed and a longitudinal incision was made with a scalpel to expose the cartilage in the distal femur.
- the medial meniscus was detached from the synovium to expose the medial meniscus, and about two-thirds of the whole was excised.
- the patellar tendon and synovium were sutured, and then the muscles were sutured.
- rSMSC rat synovial membrane-derived mesenchymal stem cells
- PBS group rat synovial membrane-derived mesenchymal stem cells
- the mesenchymal stem cells to be administered were 20% Fetal Bovine Serum (Gibco Cat. # 10270), 1% Antibiotic-Antimycotic (100 ⁇ ) (Thermo Fisher scientific Cat. Sleeping using the contained basal medium A, culturing for 8 days, and collecting 5 ⁇ 10 6 cells were pierced into the knee joint from the suture site in the direction perpendicular to the knee joint using an injection needle. It was transplanted and the skin was sutured. After the operation, all rats were returned to their cages and allowed to exercise and eat and drink freely.
- the area of the meniscus regeneration portion was measured by ImageJ (version 1.52).
- the regenerated part of the meniscus was visually judged from the color tone and shape of the meniscus, and the area was calculated using Equation 1.
- Meniscus reproduction area (mm 2 ) number of pixels in meniscus reproduction area / 1 mm Number of pixels per 2
- the mean value, standard deviation and statistical analysis of the regenerated partial area of each group were all performed by Microsoft Excel 2007 (Microsoft Corp.).
- Student's T-Test was performed between the rSMSC group and the PBS group, and a significance level of less than 5% (P ⁇ 0.05) was regarded as having a difference.
- Table 11 shows the values of the meniscal regeneration area of the rSMSC group and the PBS group.
- the regenerated area of the meniscus in the PBS group was 1.1 mm 2
- the regenerated area of the rSMSC group was 2.0 mm 2 , which was approximately twice as large as that of the meniscus, showing a statistically significant difference (P ⁇ 0.05). Indicated.
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Abstract
Description
<1> アスコルビン酸誘導体、アラニルグルタミンおよびピリドキシンを含む培地において間葉系幹細胞を培養することを含む、関節治療用細胞製剤の製造方法。
<2> 上記間葉系幹細胞が、滑膜由来間葉系幹細胞である、<1>に記載の方法。
<3> 上記間葉系幹細胞が、自家由来である、<1>または<2>に記載の方法。
<4> 上記培地が、同種血清を含む、<1>から<3>のいずれか一に記載の方法。
<5> 上記培地が、アスコルビン酸を含まない、<1>から<4>のいずれか一に記載の方法。
<6> 上記培地が、ビオチンまたはリポ酸のいずれか一以上を含む、<1>から<5>のいずれか一に記載の方法。
<7> 5層以上の多層フラスコを用いて間葉系幹細胞を培養する、<1>から<6>のいずれか一に記載の方法。
<8> 間葉系幹細胞を含む組織の懸濁液を上層と下層の二層に分離させること、および上記二層のうちの下層を採取することをさらに含み、
アスコルビン酸誘導体、アラニルグルタミンおよびピリドキシンを含む培地において上記下層に含まれる間葉系幹細胞を培養する、<1>から<7>のいずれか一に記載の方法。
<9> <1>から<8>のいずれか一に記載の方法により製造された、関節治療用細胞製剤。
<10> 細胞外基質またはスキャホールドを含まない、<9>に記載の関節治療用細胞製剤。
<11> 半月板治療剤または変形性関節症治療剤である、<9>または<10>に記載の関節治療用細胞製剤。
<12> 間葉系幹細胞がヒト間葉系幹細胞であり、間葉系幹細胞の染色体数が46本であり、染色体のカリオタイピングが、一対の1番から22番染色体と、XX染色体またはXY染色体とである、<9>から<11>の何れか一に記載の関節治療用細胞製剤。
<13> 間葉系幹細胞を含む組織の懸濁液を上層と下層の二層に分離させること、
上記二層のうちの下層を採取すること、および
アスコルビン酸誘導体、アラニルグルタミンおよびピリドキシンを含む培地において上記下層に含まれる間葉系幹細胞を培養することを含む、間葉系幹細胞の培養方法。
<14> 上記間葉系幹細胞が、滑膜由来間葉系幹細胞である、<13>に記載の方法。
<15> 上記間葉系幹細胞が、自家由来である、<13>または<14>に記載の方法。
<16> 上記培地が、同種血清を含む、<13>から<15>のいずれか一に記載の方法。
<17> 上記培地が、アスコルビン酸を含まない、<13>から<16>のいずれか一に記載の方法。
<18> 上記培地が、ビオチンまたはリポ酸のいずれか一以上を含む、<13>から<17>のいずれか一に記載の方法。
<19> 5層以上の多層フラスコを用いて間葉系幹細胞を培養する、<13>から<18>のいずれか一に記載の方法。
<20> <13>から<19>のいずれか一に記載の方法により培養された間葉系幹細胞を含む、関節治療用細胞製剤。
<21> 細胞外基質またはスキャホールドを含まない、<20>に記載の関節治療用細胞製剤。
<22> 半月板治療剤または変形性関節症治療剤である、<20>または<21>に記載の関節治療用細胞製剤。
<23> 間葉系幹細胞がヒト間葉系幹細胞であり、間葉系幹細胞の染色体数が46本であり、染色体のカリオタイピングが、一対の1番から22番染色体と、XX染色体またはXY染色体とである、<20>から<22>の何れか一に記載の関節治療用細胞製剤。
間葉系幹細胞を軟骨細胞に分化させることによって、軟骨損傷部または半月板損傷部でin situで軟骨組織を再生させる工程;
を含む、関節の治療方法。
本発明は、アスコルビン酸誘導体、アラニルグルタミンおよびピリドキシンを含む培地において間葉系幹細胞を培養することを含む、関節治療用細胞製剤の製造方法に関する。上記した特定成分を含む培地において間葉系幹細胞を培養することによって、核型異常の発生が抑制されるにも関わらず、高い細胞増殖を得られること、すなわち、核型異常の発生の抑制と、高い細胞増殖とを両立できることは、従来の知見から予想できることではなく、全く予想外な結果である。
間葉系幹細胞とは、骨芽細胞、軟骨芽細胞、脂肪芽細胞、筋細胞等の間葉系の細胞の全てまたはそのうちの一部の細胞への分化が可能な幹細胞またはその前駆細胞の集団を広義に意味する。間葉系幹細胞は骨髄、滑膜、骨膜、脂肪組織、筋肉組織に存在することが知られている。間葉系幹細胞の軟骨細胞への分化に関連して、BMP(bone morphogenetic protein:骨形成タンパク質)あるいはTGF-β(Transforming growth factor-β:トランスフォーミング増殖因子-β)を培養液に添加することにより、未分化間葉系幹細胞の軟骨細胞への分化が促進され、そして軟骨組織がin vitro条件下で再生できることが知られている。
間葉系幹細胞は、ヒト間葉系幹細胞であることが好ましい。
間葉系幹細胞は、遺伝子改変された細胞でもよいし、遺伝子改変されていない細胞でもよいが、好ましくは遺伝子改変されていない細胞である。
滑膜組織は、麻酔下で関節の非荷重部分から採取することができる。滑膜組織の採取量は、ドナーの種類、または必要とされる滑膜由来間葉系幹細胞の量を考慮して決めることができる。例えば、0.1g~10g、好ましくは0.1g~2.0g、より好ましくは0.1g~1.5g、さらに好ましくは0.1g~1.0gの滑膜組織から滑膜由来間葉系幹細胞を得ることができる。採取した滑膜組織は、必要に応じてハサミ等で細断した後、酵素処理に供される。酵素としては、プロテアーゼを含む酵素であれば特に限定されないが、好ましくは、1種以上のコラゲナーゼと1種以上の中性プロテアーゼを含む混合酵素である。特に好ましい酵素は、リベラーゼである。リベラーゼとしては、例えば、リベラーゼMNP-S(ロシュ製)を使用することができるが、これはコラゲナーゼクラスIとコラゲナーゼクラスIIと中性プロテアーゼ(サーモシリン)とを含む酵素である。酵素処理における酵素濃度は、好ましくは0.01mg/ml~10mg/mlであり、より好ましくは0.1mg/ml~10mg/mlであり、さらに好ましくは0.5mg/ml~10mg/mlであり、さらに一層好ましくは0.5mg/ml~5.0mg/mlであり、特に好ましくは0.5mg/ml~2.0mg/mlであり、最も好ましくは0.7mg/ml~2.0mg/mlである。滑膜組織と酵素の質量比率は、好ましくは1000:1~10:1であり、より好ましくは500:1~20:1であり、さらに好ましくは200:1~40:1である。
本発明で使用する培地は必須アミノ酸を含むことが好ましい。すなわち、培地は、ヒスチジン、イソロイシン、ロイシン、リジン、メチオニン、フェニルアラニン、スレオニン、トリプトファンおよびバリンを含むことが好ましい。培地における必須アミノ酸の濃度は特に限定されないが、各必須アミノ酸の濃度が、0.003mmol/L以上であることが好ましく、0.005mmol/L以上であることがより好ましく、0.01mmol/L以上であることがさらに好ましい。上限値としては、5mmol/L以下であることが一般的である。
必須アミノ酸は合計濃度としては、0.5mmol/L以上であることが好ましく、1mmol/L以上であることがより好ましく、1.5mmol/L以上であることがさらに好ましい。上限値としては、15mmol/L以下であることが一般的である。
培地は、ビオチンを含んでいてもよい。
培地はさらに、ピリドキシンおよびビオチン以外に、少なくとも1種のその他のビタミン類を含んでいてもよい。その他のビタミン類としては、ビタミンB12、塩化コリン、パントテン酸カルシウム、葉酸、ナイアシンアミド、ピリドキサール類(ピリドキシンを除く)、リボフラビン、チアミン塩酸塩およびi-イノシトールが挙げられる。ピリドキサール類としては、ピリドキサールが挙げられる。
上記したピリドキシン、ビオチン、および少なくとも1種のその他のビタミン類は、遊離体のみならず塩を形成していてもよい。塩の形態には酸付加塩や塩基との塩等を挙げることができる。具体的には、アミノ酸について上記したものが挙げられる。
培地におけるビタミン類の含有濃度は、合計で、0.001mmol/L以上であることが好ましく、0.005mmol/L以上であることがより好ましく、0.01mmol/L以上であることがさらに好ましい。上限値としては、2mmol/L以下であることが一般的である。
本発明で使用する培地は、好ましくは、アスコルビン酸を含まない。
ここで含まないとは、本発明の効果との関係で実質的に含まれていないことを言い、不可避的に混入するものを排除する意味ではない。実質的に含まれない例としては、アスコルビン酸の場合は、通常、5×10-5mmol/L未満であり、好ましくは、0mmol/Lである。リノール酸の場合は、通常、0.0015mmol/L未満であり、好ましくは、0.001mmol/L以下、より好ましくは、0.0005mmol/L以下、更に好ましくは、0.0003mmol/L以下であり、特に好ましくは、0.00015mmol/L以下であり、最も好ましくは、0mmol/Lである。また、核酸の場合は、通常、5×10-5mmol/L未満であり、好ましくは、0mmol/Lである。
ここで含まないとは、実質的に含まれていないことを言い、不可避的に混入するものを排除する意味ではない。実質的に含まれない例としては、インスリンの場合は、通常、
10ng/mL未満であり、好ましくは、0ng/mLである。トランスフェリンの場合は、通常、10ng/mL未満であり、好ましくは、0ng/mLである。亜セレン酸の場合は、通常、0.01ng/mL未満であり、好ましくは、0ng/mLである。BSAの場合は、通常、10μg/mL未満であり、好ましくは、0μg/mLである。
間葉系幹細胞の培養に用いられる培養器は、間葉系幹細胞の培養が可能なものであれば特に限定されないが、フラスコ、組織培養用フラスコ、ディッシュ、ペトリデッシュ、組織培養用ディッシュ、マルチディッシュ、マイクロプレート、マイクロウエルプレート、マルチプレート、マルチウエルプレート、マイクロスライド、チャンバースライド、シャーレ、チューブ、トレイ、培養バック、およびローラーボトルが挙げられる。本発明において好ましくは、5層以上(例えば、5~10層)の多層フラスコを用いて間葉系幹細胞を培養してもよい。5層以上の多層フラスコの一例としては、10セルスタック(ポリスチレン製セルスタック-10 チャンバー、Corning社製)を使用することができる。フラスコとしては、ベントキャップを設けたフラスコを使用することもできる。ベントキャップを設けたフラスコを使用し、ベントキャップからガスを強制的に通気しながら培養することによって、間葉系幹細胞の増殖率を著しく向上することができる。
滑膜由来間葉系幹細胞は、in vitroでの滑膜由来間葉系幹細胞の継代数と反比例して、in situ軟骨形成能が低下することも知られている。従って、未分化の滑膜由来間葉系幹細胞を調製するためには、10継代以下であることが好ましく、5継代以下であることがより好ましい。
本発明は、
間葉系幹細胞を含む組織の懸濁液を上層と下層の二層に分離させること、
上記二層のうちの下層を採取すること、および
アスコルビン酸-2-リン酸エステル三ナトリウム、アラニルグルタミンおよびピリドキシンを含む培地において上記下層に含まれる間葉系幹細胞を培養すること、
を含む、間葉系幹細胞の培養方法に関する。
上記した本発明による間葉系幹細胞の培養方法における、間葉系幹細胞、培地、および培養方法の具体例、好ましい態様は、本明細書中に上記した通りである。
本発明によれば、本発明による関節治療用細胞製剤により製造された関節治療用細胞製剤が提供される。本発明によればさらに、本発明による間葉系幹細胞の培養方法により培養された間葉系幹細胞を含む、関節治療用細胞製剤が提供される。
本発明によれば、本発明の方法で得られる間葉系幹細胞を有効成分として含有する関節治療用細胞製剤を製造することができる。
ここでいう細胞外基質またはスキャホールドとしては、コラーゲン、ヒアルロン酸、アルギン酸、ポリ乳酸、ポリグリコール酸を挙げることができる。
本発明はさらに、関節の治療方法に関する。より具体的には、本発明は、半月板損傷、外傷性軟骨損傷、離断性骨軟骨炎、無腐性骨壊死、変形性関節症(例えば、関節部位が膝である変形性膝関節症、関節部位が肘関節、指関節、股関節、肩関節、足関節、頚椎、複数の関節部位の組み合わせ)、関節リウマチ(例えば、慢性関節リウマチ)、痛風、反応性関節炎、乾癖性関節炎、若年性関節炎、炎症性関節炎、関節軟骨欠損からなる群より選択される疾患の治療方法に関する。
軟骨損傷部または半月板損傷部を間葉系幹細胞により覆うように、本発明の関節治療剤を移植する工程;および
間葉系幹細胞を軟骨細胞に分化させることによって、軟骨損傷部または半月板損傷部でin situで軟骨組織を再生させる工程;
を含む。
軟骨損傷部を上方に向けるように体位を保持すること;
間葉系幹細胞の細胞シート、間葉系幹細胞の懸濁液、または間葉系幹細胞を含むゲル状物質を軟骨損傷部の表面に静置すること;そして
特定の時間体位を保持して、それにより間葉系幹細胞を軟骨損傷部の表面に接着させること;
を含む。
半月板損傷部が下向きになるように体位を保持すること;
間葉系幹細胞の懸濁液を膝関節内に注射すること;そして
特定の時間体位を保持して、間葉系幹細胞を半月板損傷部に接着させること;
を含む。
<材料と方法>
(1)細胞
Allcells社より購入したヒト骨髄組織(Whole Bone Marrow, Fresh, 10mL、型番:ALL-ABM001、ロット:B009、B012)より単離した間葉系幹細胞(MSC)を使用した。
タイプ基礎培地:
Thermo Fisher Scientific社 MEM alpha no nucleosides (型番:12561)
タイプ培地のアスコルビン酸、グルタミン、ピリドキサールをそれぞれ、アスコルビン酸-2-リン酸エステル三ナトリウム、アラニルグルタミン、ピリドキシンに置き換えた培地
間葉系幹細胞の培養には、(2)に記載のそれぞれの基礎培地に抗生物質としてゲンタマイシン硫酸塩(「高田製薬ゲンタシン注60」)を20μg/mL、および、牛胎児血清(SAFC社 型番:12007Cもしくは、Selborne社 型番:FBS-04)を最終濃度15%(v/v)になるように添加し、使用した。以下、それぞれをタイプ培地、培地Aと称する。また、増殖能を向上させるために、上記タイプ培地にbFGF(フィブラストスプレー250(科研製薬)を注射用水に溶解し、10μg/mLに調製したもの)を終濃度が10ng/mLとなるように添加し、使用した。以下、タイプ培地+bFGFと称する。なお、bFGFは、塩基性線維芽細胞成長因子(basic fibroblast growth factor)の略である。
作製したそれぞれの細胞ストックは37℃ウォーターバスにて解凍し、200×gで5分間遠心し、凍結液を除去し、それぞれの培地を加え、0.35~0.50×104cells/cm2になるようにフラスコに播種し、37℃、5%CO2雰囲気下のインキュベータ内で培養を3日もしくは4日間行った。フラスコ底面の60%以上を細胞が満たしたときに、トリプシンで剥離し、上記した方法で、回収した細胞を各培地に置き換え、0.25~0.50×104 cells/cm2になるようにフラスコに播種し、37℃、5% CO2雰囲気下のインキュベータ内で培養を3日もしくは4日間行った。
(1)タイプ培地または培地Aによる、MSCの培養および核型解析の比較
ロット:B009のタイプ培地、および培地Aで9継代したMSCの凍結ストック(P10)を解凍し、それぞれの培地で2継代培養を行い、P12(11継代したもの)の細胞の核型解析を行った。
増殖能を比較した結果、培地Aで培養したMSCの増殖能はタイプ培地に比べ、有意に高いことを見出した。図1に集団倍加値で表した増殖曲線の比較を示す。集団倍加値(PDL)は、細胞の分裂回数を示し、以下の計算式から算出する。継代ごとにPDLを算出し、累積していくことで、増殖曲線を作成した。
PDLの計算式: (Log(回収細胞数)―Log(播種細胞数))/Log2
ロット:B012のタイプ培地+bFGF、および培地Aで4継代したMSCの凍結ストック(P5)を解凍し、それぞれの培地で2継代培養を行い、P7(6継代したもの)の細胞の核型解析を行った。
増殖能を比較した結果、タイプ培地にbFGFを加えることにより、培地Aと同等程度の増殖を示すことができた。そこで、タイプ培地+bFGF、培地Aの核型解析を行ったところ、培地Aで培養したMSCでは、核型異常は見つからなかったが、タイプ培地+bFGFで培養したMSCでは、核型異常が見られた。表3および図3にその結果を示す。
(材料と方法)
(1)細胞
実験にはヒト骨髄間葉系幹細胞、またはブタ滑膜間葉系幹細胞を用いた。
実施例として、[実験A]に記載の培地(培地A)を使用した。
比較用として、αMEM(Thermo社 型番:12561-056)(タイプ培地)を使用した。
培養容器はTフラスコ(TPP社 細胞培養フラスコ150cm2フィルターキャップ 型番:90151)または、10セルスタック(Corning社 セルスタック10チャンバー 細胞培養表面処理 型番:3270)を使用した。
滑膜間葉系幹細胞の培養には、(2)に記載のそれぞれの基礎培地に抗生物質としてAntibiotic-Antimycotic(Thermo社 型番:15240-062)を1%(v/v)、および、ヒト骨髄間葉系幹細胞の培養においては自己血清を、ブタ滑膜間葉系幹細胞の培養においては牛胎児血清(ニチレイバイオサイエンス社 型番:174012)を、それぞれ最終濃度10~20%(v/v)になるように添加し、使用した。
(試験1)培地の違いによる増殖率の比較
ブタ滑膜間葉系幹細胞を20%(v/v)のFBS(ウシ胎児血清)を添加したタイプ培地で培養した。細胞播種密度は1000、1500個/cm2とし、培地量は0.12mL/cm2、培養容器はTフラスコを使用した。播種後12日目に細胞を回収してそれぞれ増殖率を算出した。播種密度1000個/cm2の条件の増殖率を1とした時の相対増殖率を表2に示す。
ヒト骨髄間葉系幹細胞をタイプ培地および培地Aを使用して培養した。
比較テスト1では、タイプ培地に20%(v/v)のFBSを添加した培地を使用し、培地量を0.12mL/cm2とした。
比較テスト2では、タイプ培地に20%(v/v)のFBSを添加した培地を使用し、培地量を0.24mL/cm2とした。
テスト3では、培地Aに20%(v/v)のFBSを添加した培地を使用し、培地量を0.12mL/cm2とした。
テスト4では、培地Aに20%(v/v)のFBSを添加した培地を使用し、培地量を0.24mL/cm2とした。
タイプ培地でも、培地Aでも、培養培地量を増加することによって、増殖率が向上することがわかった。
ブタ滑膜間葉系幹細胞をタイプ培地および培地Aを使用して培養した。
比較テスト11では、タイプ培地に20%(v/v)のFBSを添加した培地を使用し、培地量を0.12mL/cm2とした。
比較テスト12では、タイプ培地に20%(v/v)のFBSを添加した培地を使用し、培地量を0.20mL/cm2とした。
テスト13では、培地Aに20%(v/v)のFBSを添加した培地を使用し、培地量を0.12mL/cm2とした。
テスト14では、培地Aに20%(v/v)のFBSを添加した培地を使用し、培地量を0.20mL/cm2とした。
タイプ培地でも、培地Aでも、培養培地量を増加することによって、増殖率が向上することがわかった。
ブタ滑膜間葉系幹細胞を、基礎培地にタイプ培地および培地Aを使用して培養した。
テスト21では、タイプ培地に20%(v/v)のFBSを添加した培地を使用し、培地量を0.12mL/cm2とした。
比較テスト22では、培地Aに20%(v/v)のFBSを添加した培地を使用し、培地量を0.12mL/cm2とした。
テスト23では、培養に使用するFBSの総量がテスト21と同量になるように、培地Aに10%(v/v)のFBSを添加した培地を使用し、培地量を0.24mL/cm2とした。
一般的には、血清濃度を下げると増殖率が下がることが知られている。それは、血清濃度が細胞増殖率に最も寄与すると考えられているからである。一方、培地Aでは、使用する血清量が同じでも、基礎培地量を増やして血清濃度を低下させることで、予想外に増殖率が向上することがわかった。
ヒト骨髄間葉系幹細胞をタイプ培地および培地Aを使用して培養した。
比較テスト31では、20%(v/v)のFBSを添加したタイプ培地を使用し、培地量を0.12mL/cm2とした。
比較テスト32では、培養に使用するFBSの総量がテスト31と同量になるように、10%(v/v)のFBSを添加したタイプ培地を使用し、培地量を0.24mL/cm2とした。
テスト33では、培養に使用するFBSの総量がテスト31と同量になるように、10%(v/v)のFBSを添加した培地Aを使用し、培地量を0.24mL/cm2とした。
タイプ培地では、使用する血清量が同じでも、血清濃度が低下すると増殖率が低下するが、基礎培地に培地Aを使用すると、基礎培地量を増やして血清濃度を低下させることで、タイプ培地に対して予想外に増殖率が向上することがわかった。タイプ培地で確認された血清濃度を下げると増殖率が低下することが、一般的な現象として理解されている事象である。
ブタ滑膜間葉系幹細胞をTフラスコ、および10セルスタック(ポリスチレン製セルスタック-10 チャンバー、Corning社製)を用いて培養した。培地はタイプ培地、および培地Aにそれぞれ20%(v/v)のFBSを添加したものを使用し、培地量は0.12mL/cm2とした。
比較テスト41-1、41-2では、タイプ培地を使用し、Tフラスコと10セルスタックをそれぞれ使用して培養した。それぞれの培養容器で12日間培養した後の増殖率を評価し、Tフラスコの増殖率を1とした時の10セルスタックの相対増殖率を表7に示す。
テスト42-1、42-2では、タイプ培地を使用し、Tフラスコと10セルスタックをそれぞれ使用して培養した。
培養容器をTフラスコから10セルスタックに変更すると、タイプ培地では増殖率が低下するのに対して、培地Aでは増殖率が向上することがわかった。
ブタ滑膜間葉系幹細胞を10セルスタックで培養した。培地はタイプ培地、および培地Aにそれぞれ20%(v/v)のFBSを添加したものを使用し、培地量は0.12mL/cm2とした。それぞれの培地で、10セルスタックのキャップ2個を、標準フィルターキャップと、標準フィルターキャップからベントキャップ(Corning セルスタック用トランスファーキャップ 型番;3281)に変更したものとで比較した。また、培地Aにおいてはベントキャップに変更し、さらに片側のベントキャップからガスを強制的に通気したものを比較した。強制通気に使用したガスは、5%CO2を含む空気で、10セルスタックに導入前にインキュベータ環境と同等に加湿(相対湿度100%)し、37℃に温調したものを使用した。
本試験は、ラット滑膜由来間葉幹細胞のラット体内での半月板再生能を示すものである。
滑膜由来間葉幹細胞の樹立に、6週齢のLewisラットを用いた。イソフルラン麻酔下にて採取した滑膜組織は、濃度20%となるようにFetal Bovine Serum(Gibco Cat.#10270)また濃度1%となるようにAntibiotic-Antimycotic(100X)(Thermofisher Scientific Cat.#15240062)を加えた基礎培地Aに対して3.0mg/mLとなるようにCollagenase V(Sigma Cat.#C9263)を添加し、37℃にて2時間反応させた。冷却した培地を添加して反応を止め、40μmのセルストレーナーに通し、残渣組織を除去した。回収した細胞を75cm2細胞培養フラスコ(Corning Inc.,型番:353136)に播種し、CO2濃度5%、37℃で6日間培養した。6日間培養後、フラスコ内の培地を破棄しPBS(リン酸緩生理食塩水)で2回洗浄したのち、5mLのTrypLE(登録商標)Express(Thermo fisher scientific Cat.#1260413)を添加し、37℃のインキュベーターで5分間静置、細胞を間葉幹細胞として回収し生死細胞オートアナライザーVi-CELL(BECKMAN COULTER,型番:731050)にて細胞数を算出した。遠心により上清を破棄、COS-banker(コスモ・バイオ株式会社 Cat.# COS-CFM01)に置換し、細胞の凍結のストックを作製した。
半月板再生部分面積(mm2)=半月板再生部分エリアのピクセル数/1mm2当たりのピクセル数
Claims (23)
- アスコルビン酸誘導体、アラニルグルタミンおよびピリドキシンを含む培地において間葉系幹細胞を培養することを含む、関節治療用細胞製剤の製造方法。
- 前記間葉系幹細胞が、滑膜由来間葉系幹細胞である、請求項1に記載の方法。
- 前記間葉系幹細胞が、自家由来である、請求項1または2に記載の方法。
- 前記培地が、同種血清を含む、請求項1から3のいずれか一項に記載の方法。
- 前記培地が、アスコルビン酸を含まない、請求項1から4のいずれか一項に記載の方法。
- 前記培地が、ビオチンまたはリポ酸のいずれか一以上を含む、請求項1から5のいずれか一項に記載の方法。
- 5層以上の多層フラスコを用いて間葉系幹細胞を培養する、請求項1から6のいずれか一項に記載の方法。
- 間葉系幹細胞を含む組織の懸濁液を上層と下層の二層に分離させること、および前記二層のうちの下層を採取することをさらに含み、
アスコルビン酸誘導体、アラニルグルタミンおよびピリドキシンを含む培地において前記下層に含まれる間葉系幹細胞を培養する、請求項1から7のいずれか一項に記載の方法。 - 請求項1から8のいずれか一項に記載の方法により製造された、関節治療用細胞製剤。
- 細胞外基質またはスキャホールドを含まない、請求項9に記載の関節治療用細胞製剤。
- 半月板治療剤または変形性関節症治療剤である、請求項9または10に記載の関節治療用細胞製剤。
- 間葉系幹細胞がヒト間葉系幹細胞であり、間葉系幹細胞の染色体数が46本であり、染色体のカリオタイピングが、一対の1番から22番染色体と、XX染色体またはXY染色体とである、請求項9から11の何れか一項に記載の関節治療用細胞製剤。
- 間葉系幹細胞を含む組織の懸濁液を上層と下層の二層に分離させること、
前記二層のうちの下層を採取すること、および
アスコルビン酸誘導体、アラニルグルタミンおよびピリドキシンを含む培地において前記下層に含まれる間葉系幹細胞を培養することを含む、間葉系幹細胞の培養方法。 - 前記間葉系幹細胞が、滑膜由来間葉系幹細胞である、請求項13に記載の方法。
- 前記間葉系幹細胞が、自家由来である、請求項13または14に記載の方法。
- 前記培地が、同種血清を含む、請求項13から15のいずれか一項に記載の方法。
- 前記培地が、アスコルビン酸を含まない、請求項13から16のいずれか一項に記載の方法。
- 前記培地が、ビオチンまたはリポ酸のいずれか一以上を含む、請求項13から17のいずれか一項に記載の方法。
- 5層以上の多層フラスコを用いて間葉系幹細胞を培養する、請求項13から18のいずれか一項に記載の方法。
- 請求項13から19のいずれか一項に記載の方法により培養された間葉系幹細胞を含む、関節治療用細胞製剤。
- 細胞外基質またはスキャホールドを含まない、請求項20に記載の関節治療用細胞製剤。
- 半月板治療剤または変形性関節症治療剤である、請求項20または21に記載の関節治療用細胞製剤。
- 間葉系幹細胞がヒト間葉系幹細胞であり、間葉系幹細胞の染色体数が46本であり、染色体のカリオタイピングが、一対の1番から22番染色体と、XX染色体またはXY染色体とである、請求項20から22の何れか一項に記載の関節治療用細胞製剤。
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EP4177340A4 (en) * | 2020-07-03 | 2024-01-03 | FUJIFILM Corporation | METHOD FOR PRODUCING MESENCHYMAL STEM CELLS DERIVED FROM SYNOVIAL MEMBRANE AND METHOD FOR PRODUCING CELL PREPARATION FOR JOINT TREATMENT AGENT |
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JPWO2022075294A1 (ja) | 2022-04-14 |
KR20230058721A (ko) | 2023-05-03 |
US20230241117A1 (en) | 2023-08-03 |
EP4227405A1 (en) | 2023-08-16 |
EP4227405A4 (en) | 2024-05-08 |
CN116322718A (zh) | 2023-06-23 |
AU2021355738A1 (en) | 2023-05-25 |
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