WO2018101481A1 - 細胞製剤 - Google Patents
細胞製剤 Download PDFInfo
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- WO2018101481A1 WO2018101481A1 PCT/JP2017/043448 JP2017043448W WO2018101481A1 WO 2018101481 A1 WO2018101481 A1 WO 2018101481A1 JP 2017043448 W JP2017043448 W JP 2017043448W WO 2018101481 A1 WO2018101481 A1 WO 2018101481A1
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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
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/0012—Galenical forms characterised by the site of application
- A61K9/0019—Injectable compositions; Intramuscular, intravenous, arterial, subcutaneous administration; Compositions to be administered through the skin in an invasive manner
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/16—Drugs for disorders of the alimentary tract or the digestive system for liver or gallbladder disorders, e.g. hepatoprotective agents, cholagogues, litholytics
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P13/00—Drugs for disorders of the urinary system
- A61P13/12—Drugs for disorders of the urinary system of the kidneys
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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
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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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P9/00—Drugs for disorders of the cardiovascular system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P9/00—Drugs for disorders of the cardiovascular system
- A61P9/04—Inotropic agents, i.e. stimulants of cardiac contraction; Drugs for heart failure
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P9/00—Drugs for disorders of the cardiovascular system
- A61P9/10—Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
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- 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
- C12N5/0653—Adipocytes; Adipose tissue
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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- 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
- C12N5/0667—Adipose-derived stem cells [ADSC]; Adipose stromal 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
- A61K2035/124—Materials from mammals; Compositions comprising non-specified tissues or cells; Compositions comprising non-embryonic stem cells; Genetically modified cells the cells being hematopoietic, bone marrow derived or blood cells
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
- A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
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- C12N2513/00—3D culture
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- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2533/00—Supports or coatings for cell culture, characterised by material
- C12N2533/30—Synthetic polymers
Definitions
- the present invention relates to a cell preparation. More specifically, the present invention relates to a preventive or therapeutic agent for a specific disease containing a predetermined cell culture as an active ingredient.
- MSCs Mesenchymal stem cells
- Non-patent Document 1 Mesenchymal stem cells
- mesenchymal stem cells When such mesenchymal stem cells are used as cell preparations, it is necessary to use cultured cells in the form of spheroids (cell clusters; cell aggregates) that form a three-dimensional network. From the viewpoint of improving the effect, it is preferable.
- spheroids cell clusters; cell aggregates
- an object of the present invention is to provide a spheroid-containing cell preparation that exhibits a high therapeutic effect on a cartilage tissue-related disease as a therapeutic target.
- the present inventors have conducted intensive research to solve the above problems. As a result, surprisingly, the present inventors have found that a cell preparation containing spheroids containing cultured mesenchymal stem cells as an active ingredient exhibits a high therapeutic effect on cartilage tissue-related diseases, thereby completing the present invention. It came.
- the present invention is a preventive or therapeutic agent for cartilage tissue-related diseases, which contains, as an active ingredient, a spheroid containing cultured mesenchymal stem cells.
- a spheroid-containing cell preparation that exhibits a high therapeutic effect on a cartilage tissue-related disease is provided as a therapeutic target.
- FIG. 1 is a photograph showing an observation image obtained by observing the course of adhesion culture of mesenchymal stem cells in Example 1 using an optical microscope.
- FIG. 1 (a) shows an observation image on the first day of culture
- FIG. 1 (b) shows an observation image on the third day of culture.
- FIG. 2 is a photograph showing an observation image obtained by observing the progress of suspension culture of mesenchymal stem cells in Example 2 using an optical microscope.
- FIG. 3 is a graph showing the results of measuring the mRNA expression level of the human TGF ⁇ 1 gene (factors causing cartilage differentiation) in mesenchymal stem cells cultured in Example 1, Example 2, and Comparative Example 1.
- FIG. 1 is a photograph showing an observation image obtained by observing the course of adhesion culture of mesenchymal stem cells in Example 1 using an optical microscope.
- FIG. 1 (a) shows an observation image on the first day of culture
- FIG. 1 (b) shows an observation image on the third day of culture.
- FIG. 2 is
- FIG. 4 is a histological study in a knee osteoarthritis model mouse administered with mesenchymal stem cells cultured in plane in Comparative Example 2 and mesenchymal stem cell spheroids obtained in Example 3 and Example 4. It is a graph which shows the result of semiquantitative scoring evaluation of a joint damage degree (it means that the damage degree of a joint is so low that a score is small).
- FIG. 5 shows the joint tissue in a knee osteoarthritis model mouse administered with the mesenchymal stem cells cultured in plane obtained in Comparative Example 2 and the mesenchymal stem cell spheroids obtained in Example 3 and Example 4. It is a microscope picture which shows the result of having performed safranin O dyeing
- One embodiment of the present invention is a prophylactic or therapeutic agent for a cartilage tissue-related disease containing a spheroid containing cultured mesenchymal stem cells as an active ingredient.
- X to Y indicating a range means “X or more and Y or less”.
- operations and physical properties are measured under conditions of room temperature (20 to 25 ° C.) / Relative humidity 40 to 50% RH.
- the preventive or therapeutic agent for a cartilage tissue-related disease contains a spheroid containing mesenchymal stem cells as an active ingredient.
- spheroid means an aggregate (cell mass) of cells, and a three-dimensional cell aggregate is also included in the concept.
- the spheroid size is not particularly limited, but as an example, the diameter of the spheroid is preferably 1 to 500 ⁇ m, and preferably 10 to 300 ⁇ m. Here, the diameter of the spheroid can be measured by an ordinary method (particle size distribution measurement).
- the spheroid as an active ingredient according to this embodiment is characterized in that it contains cultured mesenchymal stem cells.
- the mesenchymal stem cells (MSC) to be cultured are not particularly limited as long as they are undifferentiated mesenchymal cells, and are collected from mammalian bone marrow, periosteum, adipose tissue, peripheral blood and the like according to a conventional method. Things can be used. Further, after collection, undifferentiated MSCs can be selected depending on the presence or absence of plastic adhesion.
- MSC mesenchymal stem cells derived from adipose tissue from the viewpoint of easy procurement and high proliferation.
- an MSC derived from the same mammal as the subject to which the preventive / therapeutic agent of the present invention is administered and an MSC derived from the same mammal other than the subject to be administered, Cell).
- the biological species from which these cells are derived is not particularly limited, and various cells derived from humans and non-human mammals can be used.
- Examples of the biological species from which the cells are derived include, for example, primates such as humans, rhesus monkeys, green monkeys, cynomolgus monkeys, chimpanzees, tamarins and marmosets, rodents such as mice, rats, hamsters and guinea pigs, dogs, cats, rabbits, pigs, Examples include cows, goats, sheep and horses.
- MSCs to be cultured cells obtained by proliferating MSCs to 70-90% confluence (preferably 80% confluence) are regarded as zero passage, and further expanded to 1-10 passages. MSCs can be used.
- the spheroid as an active ingredient according to this embodiment is characterized in that it contains cultured mesenchymal stem cells.
- culture conditions for obtaining “cultured mesenchymal stem cells” contained in the spheroid and those skilled in the art appropriately select the conditions under which mesenchymal stem cells (MSC) can be cultured. Is possible.
- the form of culturing mesenchymal stem cells includes suspension culture and adhesion culture.
- the culture is preferably “adhesive culture”.
- Adhesive culture is a concept for “floating culture”, and means that cells to be cultured and spheroids containing the cells are adhered to the surface of the cell culture substrate and cultured.
- the cell to be cultured and the spheroid containing the cell adheres to the surface of the culture substrate means that the cell or spheroid is contained in an ECM (extracellular matrix) or the like.
- floating culture means culturing without attaching the cells to be cultured or the spheroids containing the cells to the surface of the culture substrate.
- the cell to be cultured and the spheroid containing the cell do not adhere to the surface of the culture substrate means that the cell or spheroid is attached to the culture substrate through a cell-substrate adhesion molecule contained in ECM or the like.
- the medium used for cell culture may be appropriately selected according to the cells.
- the type of medium is not particularly limited.
- any cell culture basic medium, differentiation medium, primary culture medium, or the like can be used.
- Eagle's minimum essential medium (EMEM), Dulbecco's modified Eagle medium (DMEM), ⁇ -MEM, Glasgow MEM (GMEM), IMDM, RPMI 1640, Ham F-12, MCDB medium, Williams medium E, Hepatocyte theadium medium MSC-dedicated media and mixed media thereof can be used, but the medium is not limited to these, and any medium containing components necessary for cell growth and differentiation can be used.
- a medium supplemented with serum, various growth factors, differentiation-inducing factors, antibiotics, hormones, amino acids, sugars, salts and the like may be used.
- the culture temperature is not particularly limited, but is usually about 25 to 40 ° C.
- the time for culturing there is no particular limitation on the time for culturing, and it can be appropriately determined in consideration of the cell growth rate and the desired spheroid size.
- the culture time is preferably 4 hours to 30 days (4 to 720 hours), more preferably 1 to 14 days (24 to 336 hours), and further preferably 1 to 7 days (24 to 336 hours). 168 hours). That is, it is preferable to use, as an active ingredient, a spheroid obtained by culturing for the time in the above range from the start of culturing.
- mesenchymal stem cells When the culture of mesenchymal stem cells (MSC) is adhesion culture, there is no particular limitation on the specific configuration of the cell culture substrate used for the culture, and mesenchymal stem cells (MSC) can be cultured. Any known base material can be suitably used.
- the material for the cell culture substrate can be exemplified by a resin or the like, but the cell culture substrate preferably contains a resin from the viewpoint that it is not a biological material.
- a resin is not particularly limited as long as it is highly biocompatible and can be used as a cell culture substrate.
- examples of the resin contained in the cell culture substrate include a fluororesin, a polyimide resin (for example, a fluorine-containing polyimide resin), polysulfone, polyethersulfone, polydimethylsiloxane, and the like, and blends thereof.
- a polyimide resin is preferably used from a viewpoint that the intensity
- the cell culture substrate contains a polyimide resin.
- a polyimide resin the polyimide resin containing the structural unit shown by the following formula
- the polyimide resin used in the present invention is typically obtained by imidizing a polyamic acid obtained by polymerizing at least one acid dianhydride and one or more diamines.
- the polyimide resin may contain polyamic acid as part of its chemical structure.
- the two-stage synthesis method of polyimide resin is a method of synthesizing polyamic acid as a precursor and converting the polyamic acid into polyimide acid.
- the polyamic acid as the precursor may be a polyamic acid derivative.
- the polyamic acid derivatives include polyamic acid salts, polyamic acid alkyl esters, polyamic acid amides, polyamic acid derivatives from bismethylidene pyromellitide, polyamic acid silyl esters, and polyamic acid isoimides.
- Polyimides include pyromellitic dianhydride, biphenyltetracarboxylic dianhydride, benzophenone tetracarboxylic dianhydride and other acid anhydrides, and diamines such as oxydiamine, paraphenylenediamine, metaphenylenediamine, and benzophenonediamine.
- the polyimide which becomes can be illustrated.
- the resin having a fluorine atom include 4,4′-hexafluoroisopropylidenediphthalic anhydride (6FDA) / 1,4-bis (aminophenoxy) benzene (TPEQ) copolymer, 6FDA / 4,4.
- ODPA '-Oxydiphthalic anhydride
- TPEQ copolymer 4,4'-(4,4'-isopropylidenediphenoxy) diphthalic acid
- BPADA 4,4'-(4,4'-isopropylidenediphenoxy) diphthalic acid
- HFBAPP 2,2-bis [4- (4-aminophenoxy) ) Phenyl] hexafluoropropane
- 6FDA 2,2-bis (4- (4-aminophenoxy) phenyl) propane copolymer, etc.
- structural unit represented by the following formula (I) examples thereof include fluorine-containing polyimide resins; ethylene-tetrafluoroethylene copolymers.
- X 0 represents an oxygen atom, a sulfur atom, or a divalent organic group
- Y represents a divalent organic group
- Z 1 , Z 2 , Z 3 , Z 4 , Z 5 , and Z 6 are each independently a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, or an iodine atom.
- P is 0 or 1.
- the chemical structure represented by the formula (I) may be different for each structural unit of the resin, or may be the same. It is preferable that at least one of X 0 , Y, Z 1 , Z 2 , Z 3 , Z 4 , Z 5 , and Z 6 contains one or more fluorine atoms.
- an alkylene group, arylene group, Arirenchio group Are more preferable, and an alkylene group and an aryleneoxy group are more preferable, and these may be substituted with a fluorine atom.
- the alkylene group has, for example, 1 to 12 carbon atoms, preferably 1 to 6 carbon atoms.
- Examples of the alkylene group substituted with a fluorine atom as an example of X 0 include —C (CF 3 ) 2 —, —C (CF 3 ) 2 —C (CF 3 ) 2 — and the like. .
- alkylene groups which are examples of X 0 , —C (CF 3 ) 2 — is preferable.
- the arylene group is an example of X 0, for example, it can be exemplified by the following.
- the arylene group is an example of X 0, for example, it can be exemplified by the following.
- Arirenchio group examples of X 0, for example, can be exemplified by the following.
- the divalent organic groups represented by X 0 are the above b-2 to b-10 and c-2. It is preferably selected from the group consisting of ⁇ c-10, more preferably selected from the group consisting of the above b-7 to b-9 and c-7 to c-9, represented by b-8. More preferably, it is a structure. Similarly, the divalent organic group represented by X 0 is preferably —C (CF 3 ) 2 —.
- arylene group, aryleneoxy group and arylenethio group as examples of X 0 are each independently a halogen atom (for example, fluorine atom, chlorine atom, bromine atom, iodine atom, preferably fluorine atom or chlorine atom)
- An atom, more preferably a fluorine atom may be substituted with a group selected from the group consisting of a methyl group and a trifluoromethyl group.
- substituents There may be a plurality of these substituents, in which case the types of the substituents may be the same or different.
- Suitable substituents substituted on the arylene group, aryleneoxy group and arylenethio group are a fluorine atom and / or a trifluoromethyl group, and preferably a fluorine atom.
- the arylene group, aryleneoxy group and arylenethio group are preferably substituted with at least one fluorine atom when Y does not contain a fluorine atom.
- the divalent organic group represented by Y is not particularly limited, and examples thereof include a divalent organic group having an aromatic ring. Specifically, a group composed of one benzene ring or a group having a structure in which two or more benzene rings are bonded via a carbon atom (that is, a single bond or an alkylene group), an oxygen atom, a sulfur atom or directly. Can be mentioned. Specifically, the following groups can be exemplified.
- the divalent organic group having an aromatic ring described above as an example of Y is a halogen atom (for example, a fluorine atom, a chlorine atom, a bromine atom or an iodine atom, preferably a fluorine atom or a chlorine atom, if it can be substituted). , More preferably a fluorine atom.), which may be substituted with a group selected from the group consisting of a methyl group and a trifluoromethyl group. There may be a plurality of these substituents, in which case the types of the substituents may be the same or different.
- a preferable substituent substituted with a divalent organic group having an aromatic ring is preferably a fluorine atom and / or a trifluoromethyl group, and more preferably, particularly when X 0 does not contain a fluorine atom. Is a fluorine atom.
- Y is a structure selected from the group consisting of d-3, d-9, e-1 to e-4, f-6, and f-7. It is preferably a structure of e-1, e-3 or e-4, and more preferably a structure of e-3.
- Z 1 , Z 2 , Z 3 , Z 4 , Z 5 , and Z 6 may be the same or different, and each independently represents a hydrogen atom or a fluorine atom.
- One is preferably a fluorine atom.
- the divalent organic group represented by X 0 is —C (CF 3 ) 2 —, the above b-2 to b -10 and c-2 to c-10; and Y is selected from the group consisting of d-3, d-9, e-1 to e-4, f-6, and f-7 Selected.
- the divalent organic group represented by X 0 is —C (CF 3 ) 2 —, b-7 to b-9 and c-7 to selected from the group consisting of c-9; and Y is selected from the group consisting of e-1, e-3 and e-4.
- the polyimide resin composed of the structural unit represented by the above formula (I) can be obtained by a technique of baking polyamic acid obtained by polymerization of acid dianhydride and diamine. Below, the synthesis process of 6FDA / BAPP copolymer is shown as one specific example.
- the imidation ratio of the “polyimide resin composed of the structural unit represented by the formula (I)” may not be 100%. That is, the polyimide resin composed of the structural unit represented by the formula (I) may be composed only of the structural unit represented by the above formula (I), but within the range where the objective effect of the present invention is not impaired.
- a structural unit in which the cyclic imide structure remains as amic acid without dehydration and ring closure may be included in part.
- the polyamic acid synthesis reaction is preferably performed in an organic solvent.
- the organic solvent used in the polyamic acid synthesis reaction is not particularly limited as long as the reaction between the raw material acid dianhydride and the diamine can proceed efficiently and is inert to these raw materials. .
- N-methylpyrrolidone N, N-dimethylacetamide, N, N-dimethylformamide, tetrahydrofuran, dimethyl sulfoxide, sulfolane, methyl isobutyl ketone, acetonitrile, benzonitrile, nitrobenzene, nitromethane, acetone, methyl ethyl ketone, isobutyl ketone
- polar solvents such as methanol; nonpolar solvents such as toluene and xylene.
- organic solvents may be used alone or as a mixture of two or more.
- the reaction mixture after the amidation reaction may be directly subjected to thermal imidation.
- concentration of the polyamic acid in the polyamic acid solution is not particularly limited, but is preferably 5 from the polymerization reactivity and viscosity after polymerization of the resulting resin composition, subsequent film formation, and ease of handling in baking. % By weight or more, more preferably 10% by weight or more, preferably 50% by weight or less, more preferably 40% by weight or less.
- the polyamic acid is imidized by either thermal imidization or chemical imidization to obtain a resin composition containing a fluorine-containing polyimide.
- the polyamic acid is imidized by heat treatment (thermal imidization) to obtain a resin composition containing a fluorine-containing polyimide.
- Polyimide obtained by thermal imidization has no possibility of remaining catalyst, and is more preferable for cell culture applications.
- the imidation ratio of the fluorine-containing polyimide resin may not be 100%. That is, the fluorine-containing polyimide resin may partially include a structural unit that is an amide structure in which a part of the cyclic imide structure of the structural unit represented by the above formula (I) is opened.
- the polyamic acid is heated in air, or more preferably in an inert gas atmosphere such as nitrogen, helium, or argon, or in vacuum, preferably at a temperature of 50 to 400 ° C.
- a resin composition containing polyimide is obtained by performing an imidization reaction by baking under conditions of 100 to 380 ° C., preferably 0.1 to 10 hours, more preferably 0.2 to 5 hours. be able to.
- the polyamic acid subjected to the thermal imidization reaction is in a form dissolved in an appropriate solvent. Any solvent may be used as long as it dissolves polyamic acid, and the solvents described above for the polyamic acid synthesis reaction can also be used.
- polyamic acid can be directly imidized by using a dehydration cyclization reagent described later in a suitable solvent.
- the dehydrating cyclization reagent can be used without particular limitation as long as it has a function of chemically dehydrating and cyclizing polyamic acid to form a polyimide.
- a dehydrating cyclization reagent the use of a tertiary amine compound alone or a combination of a tertiary amine compound and a carboxylic acid anhydride can promote imidization efficiently. Is preferable.
- tertiary amine compound examples include trimethylamine, triethylamine, tripropylamine, tributylamine, pyridine, 1,4-diazabicyclo [2.2.2] octane (DABCO), 1,8-diazabicyclo [5.4.
- pyridine pyridine, DABCO, N, N, N ′, N′-tetramethyldiaminomethane are preferable, and DABCO is more preferable.
- pyridine pyridine, DABCO, N, N, N ′, N′-tetramethyldiaminomethane are preferable, and DABCO is more preferable.
- Only one type of tertiary amine may be used, or two or more types may be used.
- carboxylic acid anhydride examples include acetic anhydride, trifluoroacetic anhydride, propionic anhydride, butyric anhydride, isobutyric anhydride, succinic anhydride, maleic anhydride, and the like.
- acetic anhydride and trifluoroacetic anhydride are particularly preferable, and acetic anhydride is more preferable. Only one type of carboxylic anhydride may be used, or two or more types may be used.
- a polar solvent having excellent solubility is suitable.
- tetrahydrofuran, N, N-dimethylacetamide, N, N-dimethylformamide, N-methylpyrrolidone, dimethyl sulfoxide and the like can be mentioned, among which N, N-dimethylacetamide, N, N-dimethylformamide and N
- One or more selected from the group consisting of -methylpyrrolidone is preferable from the viewpoint of homogeneous reaction.
- the polyamic acid can be used as it is for the chemical imidation without separation from the reaction mixture after the amidation reaction.
- the weight average molecular weight of the resin as the material for forming the cell culture substrate is, for example, 5,000 to 2,000,000, preferably 8,000 to 1,000,000, and more preferably 20,000. 000 to 500,000.
- the weight average molecular weight of the resin is a value measured by the following method. When the weight average molecular weight is within the above range, the spheroid-forming property becomes better.
- the cell culture surface of the cell culture substrate preferably has a static water contact angle of 75 ° or more and a falling angle of 15 ° or more.
- the static water contact angle is more preferably more than 80 °, still more preferably more than 81 °, and the upper limit of the static water contact angle is, for example, less than 150 °, preferably It is less than 120 °, more preferably 100 ° or less, and further preferably less than 90 °.
- the falling angle is preferably as high as possible in the order of 18 ° or more, 20 ° or more, 22 ° or more, 24 ° or more.
- the upper limit value of the sliding angle is, for example, less than 80 °, preferably less than 70 °, more preferably less than 60 °, and still more preferably less than 50 °.
- said static water contact angle and sliding angle are values measured by the following method.
- Measurement method of static water contact angle Apparatus: Automatic contact angle meter (manufactured by Kyowa Interface Science: DM-500) Measurement method: The adhesion angle of the droplet immediately after dropping 2 ⁇ L of water on the film is measured (measurement temperature: 25 ° C.).
- the cell culture substrate may further contain additive components such as a plasticizer and an antioxidant.
- the thickness of the substrate is not particularly limited and can be arbitrarily set.
- the thickness is 0.1 ⁇ m to 10 mm, preferably 1 ⁇ m to 1 mm.
- the cell culture substrate according to the present invention can be used for spheroid formation without being subjected to a nano-concave structure forming process, but does not exclude those having a nano-concave structure.
- the formation processing of the nano uneven structure on the cell culture substrate can be performed, for example, by the method described in JP-A No. 2014-210404.
- the cell culture substrate may be used in the form of a cell culture container.
- the cell culture container of the present invention may be configured by combining the above-described cell culture substrate and another member (for example, a support member), or the above-described cell culture substrate and Another member may be integrated and may be comprised only by the cell culture substrate mentioned above.
- the inner shape and the outer shape when the container is viewed from the side where the cell culture container is opened are, for example, a circle, respectively. , Any shape such as a polygon (square, triangle, etc.).
- the material constituting the support member examples include inorganic glass; carbon; metal such as silicon; polyolefin resin such as polyethylene, polypropylene, and cyclic olefin; polyester resin such as polyethylene terephthalate (PET); and acrylic resin such as polymethyl methacrylate Resin; Epoxy resin; Polyvinyl chloride, Polyvinylidene chloride, Polystyrene resin, Polyvinyl acetate, ABS (Acrylonitrile-butadiene-styrene) resin, Polycarbonate resin, Vinyl ether, Polyacetal, Polyphenylene ether (PPE), Polyaryl ether, Polyphenylene sulfide (PPS), polyether ether ketone (PEEK), polyaryl ether ketone, phenol resin, polyether nitrile (PEN) and the like can be exemplified.
- PPE Polyphenylene ether
- PPS Polyaryl ether
- PEEK polyether ether ketone
- the cell culture container only needs to include the above-described cell culture substrate, and may have any shape as a whole.
- it can be in the form of various containers such as plates for culture such as single or multiwell plates, petri dishes, dishes, flasks and bags.
- the cell culture container may be in the form of a cell culture container in a culture apparatus such as a mass culture apparatus or a perfusion culture apparatus.
- the disease targeted by the preventive / therapeutic agent according to the present invention containing the above-mentioned spheroid as an active ingredient is a cartilage tissue-related disease.
- Cartilage tissue-related disease is a disease related to cartilage tissue and means any disease whose symptoms can be improved by regeneration of cartilage.
- Cartilage tissue-related diseases include, for example, osteoarthritis of the knee, traumatic cartilage damage, shoulder periarthritis, temporomandibular disorders, rheumatoid arthritis, osteolytic osteochondrosis, innocuous osteonecrosis, and meniscal damage Is mentioned.
- a prophylactic / therapeutic agent for a cartilage tissue-related disease containing the above-described spheroid as an active ingredient is provided.
- the present invention also provides the following: .
- a method for preventing or treating a cartilage tissue-related disease comprising administering a spheroid containing cultured mesenchymal stem cells to a patient in need thereof.
- spheroids containing cultured mesenchymal stem cells in the manufacture of a medicament for the prevention or treatment of cartilage tissue related diseases.
- preventive / therapeutic agent containing the spheroid according to the present invention as an active ingredient exhibits the preventive / therapeutic effect on various cartilage tissue-related diseases as described above is not completely clear, but the following mechanism Is estimated.
- the spheroid according to the present invention contains cultured mesenchymal stem cells as an active ingredient (preferably, mesenchymal cultured by adhesion culture). It has been found that the TGF ⁇ 1 (Transforming Growth Factor (Tumor Growth Factor) - ⁇ 1) gene exhibits a significantly higher expression level compared to the two-dimensional culture because it contains stem cells as an active ingredient). Yes.
- TGF ⁇ 1 Transforming Growth Factor (Tumor Growth Factor) - ⁇ 1
- the TGF ⁇ 1 gene is a growth factor belonging to the TGF- ⁇ superfamily, and ⁇ 1, ⁇ 2, and ⁇ 3 isoforms exist in mammalian TGF- ⁇ .
- TGF ⁇ 1 is responsible for functions such as growth, differentiation and regulation of motility, and is also known to be involved in physiological functions such as embryogenesis, tissue reconstruction, and wound healing.
- mature human TGF ⁇ 1 is 100% identical with porcine, dog, bovine, and 99% amino acid sequence with mouse, rat, and horse, and exhibits crossover properties.
- the spheroid according to the present invention exhibits a significantly high expression level for a given gene as compared with the two-dimensional culture, but as a mechanism thereof, the spheroid creates a three-dimensional cell state, This is thought to be due to the reproduction of a state close to the state of cells existing in.
- spheroids that contain mesenchymal stem cells that have been cultured specifically for adherence follow a similar process to two-dimensional culture than spheroids that contain mesenchymal stem cells that have been cultured in suspension, resulting in an overall increase in gene expression. It is possible.
- spheroids containing mesenchymal stem cells cultured in an adherent culture are cultured while adhering to the surface of the cell culture substrate, resulting in the formation of relatively small spheroids as a result of less association between cells. Is possible. For this reason, since there is little possibility that the supply of nutrients and oxygen from the medium is blocked, it may indicate a high function (gene expression level).
- the preventive / therapeutic agent according to the present invention can be prepared, stored, and administered in the same manner while referring to the knowledge of conventionally known cell preparations.
- the preventive / therapeutic agent according to the present invention usually has the form of an injection.
- When preparing injections add pH regulators, buffers, stabilizers, tonicity agents, local anesthetics, etc. to the active ingredient, and use subcutaneous, intramuscular and intravenous injections by conventional methods. Can be manufactured.
- Examples of the pH adjuster and buffer in this case include sodium citrate, sodium acetate, sodium phosphate, and phosphate saline.
- Examples of the stabilizer include sodium pyrosulfite, ethylenediaminetetraacetic acid (EDTA), thioglycolic acid, and thiolactic acid.
- Examples of local anesthetics include procaine hydrochloride and lidocaine hydrochloride.
- Examples of isotonic agents include sodium chloride and glucose.
- the preventive agent and / or therapeutic agent according to the present invention may further contain various additive components that are generally used, if necessary, in addition to the active ingredient.
- the amount of the active ingredient contained in the prophylactic / therapeutic agent according to the present invention can be appropriately determined depending on the dose range of the active ingredient, the number of times of medication, and the like.
- the dose range is not particularly limited, and the effectiveness of the ingredients contained, dosage form, administration route, type of disease, subject nature (such as body weight, age, medical condition and use of other medicines), and the physician's It can be set as appropriate according to the judgment.
- the fluorinated polyamic acid resin composition obtained above was applied onto a glass substrate using a die coater so that the thickness of the fluorinated polyimide film after firing was 40 ⁇ m, thereby forming a coating film.
- the coating film was baked in a nitrogen atmosphere at 340 ° C. for 1 hour. Thereafter, the fired product was peeled from the glass substrate to obtain a fluorine-containing polyimide film 1.
- the static water contact angle of this fluorine-containing polyimide film 1 was 83.0 °, and the falling angle was 24.5 °.
- Human adipose tissue-derived stem cells (Addipose derived Stem Cells: AdSC) were collected from human adipose tissue using a known method utilizing collagenase treatment and centrifugal specific gravity method.
- collagenase type 1 (1 mg / mL, Wako Pure Chemical Industries, 035-17604) / 1% BSA containing DNase I (0.1 mg / mL, Roche, 1284932) and 3 mM CaCl 2
- HBSS solution was prepared.
- human adipose tissue (about 1 to 2 g) was shredded with a scalpel and placed in a 15 mL tube together with the collagenase solution about 3 times the volume of the tissue, followed by shaking incubation at 37 ° C. for 60 minutes.
- the obtained cell suspension is collected in a new 50 mL tube while passing through a cell strainer (70 ⁇ m, BD), and gently 10 mL of the collected cell solution is gradually added to two 15 mL tubes containing 4 mL of Histopaque 1077 at room temperature. Layered without mixing. These were centrifuged at room temperature 800 ⁇ g for 20 minutes (no brake). After centrifugation, only the mononuclear cell layer was collected with a 2.5 mL syringe with 18 G needle, transferred to a new 15 mL tube, and cooled 5 mM EDTA. / PBS to make 14 mL.
- the cells were suspended in 1 mL of cooled 5 mM EDTA / PBS, diluted to 14 mL, centrifuged at 200 ⁇ g for 10 minutes, and the supernatant was discarded.
- the obtained cell pellet was suspended in a primary culture medium (10% FBS / DMEM F12, Sigma D8042 + Antibiotic-Antilytic, GIBCO 15240-062) and then about 3 ⁇ 10 4 / cm 2 to 4 ⁇ 10 4 / cm 2 .
- Culture dishes were seeded at cell density. Thereafter, the cells were cultured in a 5% (v / v) CO 2 incubator for 4 to 5 days, and the adherent cells were used as mesenchymal stem cells derived from human adipose tissue in the following experiments.
- the cell suspension was prepared to a concentration of 2 ⁇ 10 5 cells / mL. Thereafter, 9 mL of a medium was previously added to a 100 mm dish (manufactured by Falcon), and 1 mL of the cell suspension adjusted to the above concentration was added thereto, and expanded in a 5% (v / v) CO 2 incubator at 37 ° C. Culture was performed.
- Example 1 Adherent culture of mesenchymal stem cells derived from human adipose tissue> After removing the medium from the 100 mm dish and adding 3 mL of cell detachment solution TrypLE select (manufactured by Thermo Fisher Scientific), the cells were maintained in a 5% (v / v) CO 2 incubator at 37 ° C. for about 5 minutes. It peeled. Subsequently, it transferred to the tube so that a total amount might be set to 10 mL using 10% FBS / DMEM F12 culture medium.
- TrypLE select manufactured by Thermo Fisher Scientific
- Centrifugation was performed at 250 ⁇ g for 5 minutes, and the suspension was suspended in 2 mL of 10% FBS / DMEM F12 medium (manufactured by Sigma), and the number of cells was counted. Thereafter, the concentration was adjusted to 1 ⁇ 10 5 cells / mL.
- 1 mL of the cell suspension prepared above is seeded (1 ⁇ 10 5 cells / cell) in a 24-well plate in which the fluorine-containing polyimide film 1 that is the fluorine-containing polymer substrate prepared in Production Example 1 is placed on the cell culture surface. Well) (culture day 0). Thereafter, the cells were cultured in a 5% (v / v) CO 2 incubator at 37 ° C. and cultured until the third day.
- FIG. 1 (a) shows an observation image on the first day of culture
- FIG. 1 (b) shows an observation image on the third day of culture.
- Example 2 Suspension culture of mesenchymal stem cells derived from human adipose tissue> A human adipose tissue was prepared in the same manner as in Example 1 except that a PrimeSurface multiwell plate 24well (manufactured by Sumitomo Bakelite Co., Ltd.) was used instead of the 24-well plate in which the fluorine-containing polyimide film 1 was placed on the cell culture surface The derived mesenchymal stem cells were cultured.
- a PrimeSurface multiwell plate 24well manufactured by Sumitomo Bakelite Co., Ltd.
- ⁇ Comparative Example 1 Planar culture of mesenchymal stem cells derived from human adipose tissue> A human adipose tissue-derived material was obtained in the same manner as in Example 1 except that a 24-hole polystyrene substrate (manufactured by Falcon) was used instead of the 24-hole plate in which the fluorine-containing polyimide film 1 was placed on the cell culture surface. Mesenchymal stem cells were cultured. In this comparative example, the cultured cells only proliferated two-dimensionally (planar), and formation of spheroids was not confirmed.
- a 24-hole polystyrene substrate manufactured by Falcon
- the mRNA expression level of the human TGF ⁇ 1 gene (factor of cartilage differentiation) was measured by quantitative PCR.
- BioRad SsoFast EvaGreen Mastermix manufactured by Bio-Rad
- analysis was performed with a measuring instrument name: BioRad CFX Connect 96 well (manufactured by Bio-Rad).
- the gene expression level of TGF ⁇ 1 was calculated by calibrating each gene expression level relative to the expression level of the GAPDH gene, which is a housekeeping gene. The results are shown in FIG.
- FIG. 3 is a graph showing the results of the expression level of human TGF ⁇ 1 gene in each culture condition.
- Example 1 and Example 2 were compared with the mesenchymal stem cells cultured in Comparative Example 1, compared with the human TGF ⁇ 1 gene.
- the expression level was significantly high. This shows that the expression of the gene is promoted in spheroids containing cultured mesenchymal stem cells.
- the comparison between Example 1 and Example 2 shows that the expression of the gene is further promoted by adhesion culture on the cell culture substrate as compared with the case of suspension culture. .
- the fluorinated polyamic acid resin composition obtained above was applied onto a glass substrate using a die coater so that the thickness of the fluorinated polyimide film after firing was 40 ⁇ m, thereby forming a coating film.
- the coating film was baked in a nitrogen atmosphere at 360 ° C. for 1 hour. Thereafter, the fired product was peeled from the glass substrate to obtain a fluorine-containing polyimide film 2.
- the static water contact angle of this fluorine-containing polyimide film 2 was 81.2 °, and the sliding angle was 19.9 °.
- ⁇ Expansion culture of mesenchymal stem cells derived from human adipose tissue The human adipose tissue-derived mesenchymal stem cells obtained above were washed with 1 mL of CELLOTION (ZENOAQ), and KBM ADSC-1 medium (manufactured by Kojin Bio) was added to make 10 mL. Next, centrifugation was performed at 250 ⁇ g for 5 minutes. After centrifugation, the supernatant was removed and suspended in 2 mL of KBM ADSC-1 medium (manufactured by Kojin Bio), and the number of cells was counted. The cell suspension was prepared to a concentration of 2 ⁇ 10 5 cells / mL.
- Example 3 Adhesive culture of mesenchymal stem cells derived from human adipose tissue> After removing the medium from the 100 mm dish and adding 3 mL of cell detachment solution TrypLE select (manufactured by Thermo Fisher Scientific), the cells were maintained in a 5% (v / v) CO 2 incubator at 37 ° C. for about 5 minutes. It peeled. Subsequently, it was transferred to a tube using KBM ADSC-2 medium (manufactured by Kojin Bio) so that the total amount became 10 mL.
- TrypLE select manufactured by Thermo Fisher Scientific
- Centrifugation was performed at 250 ⁇ g for 5 minutes, and the suspension was suspended in 2 mL of KBM ADSC-2 medium (manufactured by Kojin Bio), and the number of cells was counted. Thereafter, the concentration was adjusted to 1 ⁇ 10 6 cells / mL.
- Example 4 Suspension culture of mesenchymal stem cells derived from human adipose tissue> ELPLASIA (manufactured by Kuraray) was used in place of the 35 mm petri dish in which the fluorine-containing polyimide film 2 used in Example 3 was placed on the cell culture surface.
- ELPLASIA manufactured by Kuraray
- 1 mL of the cell suspension prepared to 3.5 ⁇ 10 5 cells / mL was seeded (culture 0 day). Thereafter, the cells were cultured in a 5% (v / v) CO 2 incubator at 37 ° C. and cultured until the third day.
- the formation of spheroids could be confirmed also in this example, the spheroids were not adhered to the bottom surface of the well and were sunk in a non-adhered state on the bottom surface of the well.
- ⁇ Comparative Example 2 Planar culture of mesenchymal stem cells derived from human adipose tissue> Instead of the 35 mm petri dish in which the fluorine-containing polyimide film 2 used in Example 3 was placed on the cell culture surface, a 24-hole polystyrene base material (manufactured by Falcon) was used. In addition, 1 mL of the cell suspension prepared to 8 ⁇ 10 3 cells / mL was seeded at a time (culture day 0). Thereafter, the cells were cultured in a 5% (v / v) CO 2 incubator at 37 ° C. and cultured until the third day. In this comparative example, the cultured cells only proliferated two-dimensionally (planar), and formation of spheroids was not confirmed.
- Osteoarthritis induction (anterior cruciate ligament and meniscus unilateral excision model) was performed on 12-week-old male BALB / c nude mice. A sufficient wheel exercise load was applied after the model was prepared, and one week later, the planarly cultured mesenchymal stem cells obtained in Comparative Example 2 and the mesenchymal stem cell spheroids obtained in Examples 4 and 5 were used. Were administered locally to the joints of mice (in the region lacking cartilage).
- FIG. 4 is a histological study in a knee osteoarthritis model mouse administered with mesenchymal stem cells cultured in plane in Comparative Example 2 and mesenchymal stem cell spheroids obtained in Example 3 and Example 4.
- FIG. 5 shows joints in a knee osteoarthritis model mouse administered with the mesenchymal stem cells obtained by planar culture obtained in Comparative Example 2 and the mesenchymal stem cell spheroids obtained in Example 3 and Example 4. It is a microscope picture which shows the result of having performed safranin O dyeing
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Abstract
Description
本形態に係る軟骨組織関連疾患の予防または治療剤は、有効成分として間葉系幹細胞を含むスフェロイドを含有するものである。本明細書において「スフェロイド」とは、細胞の凝集体(細胞塊)を意味し、三次元細胞集合体をもその概念に含むものとする。なお、スフェロイドのサイズについて特に制限はないが、一例として、スフェロイドの直径は、好ましくは1~500μmであり、好ましくは10~300μmである。ここで、スフェロイドの直径は、常法(粒子径分布測定)により測定されうる。
本形態に係る有効成分としてのスフェロイドは、培養された間葉系幹細胞を含む点に特徴がある。培養に供される間葉系幹細胞(MSC)としては、未分化の間葉系細胞である限り特に制限はされず、哺乳動物の骨髄、骨膜、脂肪組織、末梢血等から常法に従い採取したものを用いることができる。また、採取後、未分化のMSCをプラスチック付着性の有無等により選択することもできる。ここで、MSCとしては、調達の容易さおよび高い増殖性という観点から、脂肪組織由来の間葉系幹細胞を用いることが好ましい。また、MSCとしては、本発明の予防・治療剤の投与対象と同種の哺乳動物由来のMSCを用いることが好ましく、投与対象以外の同種の哺乳動物由来のMSCや、投与対象自身のMSC(自家細胞)を用いることができる。これらの細胞が由来する生物種も特に制限されず、ヒトおよび非ヒト哺乳動物由来の各種細胞を用いることができる。細胞が由来する生物種としては、例えば、ヒト、アカゲザル、ミドリザル、カニクイザル、チンパンジー、タマリンおよびマーモセット等の霊長類、マウス、ラット、ハムスターおよびモルモット等の齧歯類、イヌ、ネコ、ウサギ、ブタ、ウシ、ヤギ、ヒツジ、ウマ等が例示できる。なお、培養に供されるMSCとしては、MSCを70~90%コンフルエント(好ましくは80%コンフルエント)まで増殖させて得られた細胞をゼロ継代とし、それをさらに増殖させて1~10継代のMSCを用いることができる。
本形態に係る有効成分としてのスフェロイドは、培養された間葉系幹細胞を含む点に特徴がある。スフェロイドに含まれる「培養された間葉系幹細胞」を得るための培養の条件についても特に制限はなく、当業者であれば間葉系幹細胞(MSC)を培養することが可能な条件を適宜選択することが可能である。
細胞培養用基材の材質としては、樹脂等が例示できるが、生物由来の材料ではないという観点から、細胞培養用基材は樹脂を含むことが好ましい。このような樹脂としては、細胞培養用基材として利用可能な生体適合性の高いものであれば特に制限されない。一例として、細胞培養用基材が含む樹脂は、フッ素樹脂、ポリイミド樹脂(例えば、含フッ素ポリイミド樹脂)、ポリスルホン、ポリエーテルスルホン、ポリジメチルシロキサン等や、これらのブレンドが例示されうる。また、材料の強度が高いという観点から、ポリイミド樹脂が好ましく用いられる。すなわち、本発明の好ましい一実施形態では、細胞培養用基材が、ポリイミド樹脂を含む。ポリイミド樹脂としては、以下の式(I)で示される構成単位を含むポリイミド樹脂が例示できる。また、スフェロイド形成が良好であるという観点から、分子内にフッ素原子を有する樹脂が好ましく、含フッ素ポリイミド(含フッ素ポリイミド樹脂)がより好ましい。本発明で用いられるポリイミド樹脂は、典型的には、酸二無水物とジアミンとを各々1種以上重合させて得られるポリアミド酸をイミド化することにより得られる。ポリイミド樹脂は、ポリアミド酸を化学構造の一部に含んでいてもよい。ポリイミド樹脂を製造する方法としては、公知の手法で製造すればよい。一例として二段合成法が使用できる。ポリイミド樹脂の二段合成法は前駆体としてポリアミド酸を合成し、ポリアミド酸をポリイミド酸に変換する方法である。前駆体としてのポリアミド酸はポリアミド酸誘導体であってもよい。ポリアミド酸誘導体としては、例えばポリアミド酸塩、ポリアミド酸アルキルエステル、ポリアミド酸アミド、ビスメチリデンピロメリチドからのポリアミド酸誘導体、ポリアミド酸シリルエステル、ポリアミド酸イソイミドなどが挙げられる。ポリイミドとしてはピロメリット酸二無水物、ビフェニルテトラカルボン酸二無水物、ベンゾフェノンテトラカルボン酸二無水物等の酸無水物と、オキシジアミン、パラフェニレンジアミン、メタフェニレンジアミン、ベンゾフェノンジアミン等のジアミンとからなるポリイミドが例示できる。フッ素原子を有する樹脂としては、例えば、4,4’-ヘキサフルオロイソプロピリデンジフタル酸無水物(6FDA)/1,4-ビス(アミノフェノキシ)ベンゼン(TPEQ)共重合体、6FDA/4,4’-オキシジフタル酸無水物(ODPA)/TPEQ共重合体、4,4’-(4,4’-イソプロピリデンジフェノキシ)ジフタル酸(BPADA)/2,2-ビス[4-(4-アミノフェノキシ)フェニル]ヘキサフルオロプロパン(HFBAPP)、6FDA/2,2-ビス(4-(4-アミノフェノキシ)フェニル)プロパン(BAPP)共重合体等の以下の式(I)で示される構成単位を含む含フッ素ポリイミド樹脂;エチレン-テトラフルオロエチレン共重合体等が例示できる。
Yは2価の有機基を示し;Z1、Z2、Z3、Z4、Z5、及びZ6は互いに独立して水素原子、フッ素原子、塩素原子、臭素原子またはヨウ素原子のいずれかを示し、pは0または1である。なお、ポリイミド樹脂において、式(I)で示される化学構造は、樹脂の構成単位ごとに異なってもよく、同一であってもよい。X0、Y、Z1、Z2、Z3、Z4、Z5、およびZ6の少なくとも1つはフッ素原子を1個以上含むことが好ましい。
装置:東ソー株式会社製 HCL-8220GPC
カラム:TSKgel Super AWM-H
溶離液(LiBr・H2O、リン酸入りNMP):0.01mol/L
測定方法:0.5重量%の溶液を溶離液で作製し、ポリスチレンで作製した検量線をもとに分子量を算出する。
装置:自動接触角計(協和界面科学製:DM-500)
測定方法:フィルム上に水2μLを滴下した直後の液滴の付着角度を測定する(測定温度:25℃)。
装置:自動接触角計(協和界面科学製:DM-500)
測定方法:フィルム上に水25μLを滴下した後、基材を連続的に傾けていき、流れ落ちた際の角度を転落角とする(測定温度:25℃)。
上述したスフェロイドを有効成分として含有する本発明に係る予防・治療剤が予防・治療のターゲットとする疾患は、軟骨組織関連疾患である。
100mL容量の三口フラスコに2,2-ビス(4-(4-アミノフェノキシ)フェニル)プロパン(BAPP) 3.602g(8.77ミリモル)、N-メチル-2-ピロリドン42.5gを仕込み溶解した。そこへ4,4’-ヘキサフルオロイソプロピリデンジフタル酸無水物(6FDA) 3.898g(8.77ミリモル)を加え、窒素雰囲気下、室温で5日間攪拌して、含フッ素ポリアミド酸樹脂組成物(固形分濃度15.0質量%)を得た。ここで、得られたポリアミド酸の重量平均分子量は280,000であった。なお、ポリアミド酸の重量平均分子量と、焼成後の含フッ素ポリイミドの重量平均分子量とは実質的に同一である。
コラゲナーゼ処理および遠心比重法を利用した周知の方法を用いて、ヒト脂肪組織からヒト脂肪組織由来幹細胞(Adipose derived Stem Cell:AdSC)を採取した。
上記で得られたヒト脂肪組織由来の間葉系幹細胞を1mLのCELLOTION(ZENOAQ製)で洗浄し、10%FBS/DMEM F12培地(シグマ製)を添加して10mLとした。次いで、250×gで5分間の遠心処理を施した。遠心処理後、上清を除去し、2mLの10%FBS/DMEM F12培地(シグマ製)で懸濁させて、細胞数のカウントを行った。細胞懸濁液は2×105細胞/mLの濃度となるように調製した。その後、100mmディッシュ(ファルコン製)に9mLの培地を予め加えておき、そこに上記の濃度に調整した細胞懸濁液を1mL加え、37℃の5%(v/v)CO2インキュベーター内で拡大培養を行った。
100mmディッシュから培地を除去し、細胞剥離液TrypLE select(サーモフィッシャーサイエンティフィック製)を3mL添加した後、37℃の5%(v/v)CO2インキュベーター内で5分間程度保持して細胞を剥離した。次いで、10%FBS/DMEM F12培地を用いて総量が10mLになるようにチューブへ移した。250×gで5分間遠心処理を施し、2mLの10%FBS/DMEM F12培地(シグマ製)で懸濁させて、細胞数のカウントを行った。その後、1×105細胞/mLの濃度となるように調製した。
含フッ素ポリイミドフィルム1を細胞培養面に配置した24穴プレートに代えて、PrimeSurfaceマルチウェルプレート24well(住友ベークライト製)を用いたこと以外は、上述した実施例1と同様の手法により、ヒト脂肪組織由来の間葉系幹細胞の培養を行った。
含フッ素ポリイミドフィルム1を細胞培養面に配置した24穴プレートに代えて、24穴ポリスチレン基材(ファルコン製)を用いたこと以外は、上述した実施例1と同様の手法により、ヒト脂肪組織由来の間葉系幹細胞の培養を行った。本比較例において、培養された細胞は二次元的(平面状)に増殖するのみであり、スフェロイドの形成は確認されなかった。
実施例1および実施例2並びに比較例1において間葉系幹細胞の培養を行った培養プレートから、細胞を回収した。回収した細胞から、NucleoSpin RNA(コスモバイオ製)を用いてRNAを回収した。
100mL容量の三口フラスコに1,4-ビス(アミノフェノキシ)ベンゼン2.976g(10.2ミリモル)、4,4’-ヘキサフルオロイソプロピリデンジフタル酸無水物4.524g(10.2ミリモル)、N-メチル-2-ピロリドン42.5gを仕込んだ。窒素雰囲気下、室温で、5日間攪拌することで、含フッ素ポリアミド酸樹脂組成物(固形分濃度15.0質量%)を得た。ここで、得られたポリアミド酸の重量平均分子量は100,000であった。なお、ポリアミド酸の重量平均分子量と、焼成後の含フッ素ポリイミドの重量平均分子量とは実質的に同一である。
上記で得られたヒト脂肪組織由来の間葉系幹細胞を1mLのCELLOTION(ZENOAQ製)で洗浄し、KBM ADSC-1培地(コージンバイオ製)を添加して10mLとした。次いで、250×gで5分間の遠心処理を施した。遠心処理後、上清を除去し、2mLのKBM ADSC-1培地(コージンバイオ製)で懸濁させて、細胞数のカウントを行った。細胞懸濁液は2×105細胞/mLの濃度となるように調製した。その後、100mmディッシュ(ファルコン製)に9mLの培地を予め加えておき、そこに上記の濃度に調整した細胞懸濁液を1mL加え、37℃の5%(v/v)CO2インキュベーター内で拡大培養を行った。
100mmディッシュから培地を除去し、細胞剥離液TrypLE select(サーモフィッシャーサイエンティフィック製)を3mL添加した後、37℃の5%(v/v)CO2インキュベーター内で5分間程度保持して細胞を剥離した。次いで、KBM ADSC-2培地(コージンバイオ製)を用いて総量が10mLになるようにチューブへ移した。250×gで5分間遠心処理を施し、2mLのKBM ADSC-2培地(コージンバイオ製)で懸濁させて、細胞数のカウントを行った。その後、1×106細胞/mLの濃度となるように調製した。
実施例3で用いた含フッ素ポリイミドフィルム2を細胞培養面に配置した35mmシャーレに代えて、ELPLASIA(クラレ製)を用いた。また、3.5×105細胞/mLに調製した細胞懸濁液を1mLずつ播種した(培養0日目)。その後、37℃の5%(v/v)CO2インキュベーター内で培養を行い、3日目まで培養した。なお、本実施例においてもスフェロイドの形成が確認できたが、当該スフェロイドはウェル底面に接着しておらずウェル底面に非接着の状態で沈んでいた。
実施例3で用いた含フッ素ポリイミドフィルム2を細胞培養面に配置した35mmシャーレに代えて、24穴ポリスチレン基材(ファルコン製)を用いた。また、8×103細胞/mLに調製した細胞懸濁液を1mLずつ播種した(培養0日目)。その後、37℃の5%(v/v)CO2インキュベーター内で培養を行い、3日目まで培養した。本比較例において、培養された細胞は二次元的(平面状)に増殖するのみであり、スフェロイドの形成は確認されなかった。
12週齢の雄のBALB/cヌードマウスに対して変形性膝関節症誘発(前十字靭帯および半月板片側切除モデル)を行った。モデル作製後に十分なホイール運動負荷をかけ、1週間後に、上記比較例2で得られた平面培養された間葉系幹細胞、並びに上記実施例4および実施例5で得られた間葉系幹細胞スフェロイドをそれぞれマウスの関節(軟骨欠如領域)に関節内局所投与した。ここで、間葉系幹細胞は5×104細胞/マウスを投与し、間葉系幹細胞スフェロイドについても5×104の細胞からなるスフェロイドを投与した。モデル作製から3週間(21日目)の時点で解剖を行い、サフラニンO染色を実施して、脛骨骨頭部の軟骨層の厚みと軟骨基質の染色状況を確認した。結果を図4および図5に示す。図4は、比較例2で得られた平面培養された間葉系幹細胞並びに実施例3および実施例4で得られた間葉系幹細胞スフェロイドを投与した変形性膝関節症モデルマウスにおける組織学的関節損傷度の半定量的スコアリング評価の結果を示すグラフである(スコアが小さいほど関節の損傷度は低いことを意味する)。また、図5は、比較例2で得られた平面培養された間葉系幹細胞並びに実施例3および実施例4で得られた間葉系幹細胞スフェロイドを投与した変形性膝関節症モデルマウスにおける関節組織に対してサフラニンO染色を行った結果を示す顕微鏡写真である。
Claims (7)
- 培養された間葉系幹細胞を含むスフェロイドを有効成分として含有する、軟骨組織関連疾患の予防または治療剤。
- 細胞培養用基材上で接着培養された間葉系幹細胞を含むスフェロイドを有効成分として含有する、請求項1に記載の予防または治療剤。
- 前記軟骨組織関連疾患が、変形性膝関節症、外傷性軟骨損傷、肩関節周囲炎、顎関節症、関節リウマチ、離断性骨軟骨症、無腐性骨壊死、および半月板損傷からなる群より選択される、請求項1または2に記載の予防または治療剤。
- 前記間葉系幹細胞が、ヒト脂肪組織由来の細胞である、請求項1~3のいずれか1項に記載の予防または治療剤。
- 前記細胞培養用基材が、ポリイミド樹脂を含む、請求項1~4のいずれか1項に記載の予防または治療剤。
- 前記ポリイミド樹脂が、含フッ素ポリイミド樹脂である、請求項5に記載の予防または治療剤。
- 局部注射されることにより用いられる、請求項1~6のいずれか1項に記載の予防または治療剤。
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