WO2015122478A1 - 活性エステル基を含む繊維製造用組成物及びその繊維を用いた細胞培養足場材料 - Google Patents
活性エステル基を含む繊維製造用組成物及びその繊維を用いた細胞培養足場材料 Download PDFInfo
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
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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
- C12N5/0068—General culture methods using substrates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
- C08L33/12—Homopolymers or copolymers of methyl methacrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0015—Electro-spinning characterised by the initial state of the material
- D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/36—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising unsaturated carboxylic acids or unsaturated organic esters as the major constituent
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/52—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polymers of unsaturated carboxylic acids or unsaturated esters
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/4291—Olefin series
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/56—Non-aqueous solutions or dispersions
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/12—Applications used for fibers
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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
- C12N2533/00—Supports or coatings for cell culture, characterised by material
- C12N2533/30—Synthetic polymers
- C12N2533/40—Polyhydroxyacids, e.g. polymers of glycolic or lactic acid (PGA, PLA, PLGA); Bioresorbable polymers
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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
- C12N2537/00—Supports and/or coatings for cell culture characterised by physical or chemical treatment
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2509/00—Medical; Hygiene
Definitions
- the present invention relates to a composition for producing a fiber comprising a polymer compound having an active ester group and a hydroxy group in the side chain, a crosslinking agent, an acid compound, and a solvent, and spinning the composition (preferably, further heating.
- a scaffold for cell culture that efficiently cultures cells in vitro.
- Such a cell culture scaffold material preferably mimics the in vivo environment surrounding the cell as much as possible.
- Patent Documents In the case of culturing cells ex vivo, studies have been made in the past to process matrix constituents such as collagen extracted from living organisms as gels or sponge-like structures and use them as scaffolds for culture (Patent Documents). 1).
- these biologically derived substances mainly consisting of proteins cannot withstand sterilization such as autoclaving and gamma rays, have problems with stability for long-term storage until use, and have mechanical strength and shape stability. There are problems such as sex.
- biologically derived substances such as collagen are generally extracted from animals such as cattle and pigs, there is a risk that infectious substances are mixed from these animals.
- Patent Literature 2 to Patent Document 5
- a synthetic polymer containing an N-hydroxysuccinimide (NHS) acrylate ester monomer, a hydrophilic monomer, and a crosslinking agent is applied to the surface of a cell culture substrate (see Patent Document 6).
- nanofibers with nano-level fiber diameters are attracting attention as cell culture scaffolding materials by the method of spraying fibers while applying a high voltage called electrospinning (electrospinning). I'm bathing. Many attempts have been made to culture functional cells and pluripotent stem cells used for cell medicine and regenerative medicine on the nanofibers while maintaining the undifferentiated nature (see Non-Patent Documents 1 to 3). However, such synthetic polymer-derived fibers are difficult to impart cell adhesion and proliferation, and cannot be said to mimic the in vivo environment.
- Non-Patent Document 4 nanofibers in which a cell adhesive peptide containing RGD is immobilized have been studied (see Non-Patent Document 4).
- the cell adhesion peptide is immobilized on a synthetic polymer containing an active ester group such as N-hydroxysuccinimide (NHS) ester, but the hydrophilicity / hydrophobicity was taken into consideration so that the polymer would not dissolve in water. It has been studied using a copolymer.
- the amount of NHS introduced is limited, the amount of the cell adhesion substance that can be immobilized is also limited, and as a result, the cell adhesion of the cell culture scaffold material is also limited.
- a fiber produced by spinning a composition for producing a fiber containing a polymer compound having an active ester group and a hydroxy group in the side chain, a crosslinking agent, an acid compound, and a solvent It has been found that substances effective for cell adhesion, proliferation, differentiation, etc. can be immobilized, have sufficient organic solvent resistance, and have an excellent function as a cell culture scaffold material.
- the present inventors spin the polymer compound having an active ester group and a hydroxy group in the side chain together with a crosslinking agent and an acid compound, the present inventors have produced a hydroxy compound contained in the polymer compound.
- the present invention is as follows.
- A a polymer compound comprising a unit structure represented by the general formula (1) and a unit structure represented by the general formula (2), (B) a crosslinking agent, (C) Acid compound, and (D) Composition for fiber manufacture containing a solvent.
- R 1 represents a hydrogen atom or a methyl group
- Q 1 represents an ester bond or an amide bond
- R 2 represents an alkyl group having 1 to 10 carbon atoms or an aromatic hydrocarbon group having 6 to 10 carbon atoms in which at least one hydrogen atom is substituted with a hydroxy group.
- a fiber manufacturing composition for manufacturing a fiber that retains organic solvent resistance and liquid medium resistance, and spinning the composition for immobilize a substance effective for cell adhesion, proliferation, differentiation and the like, and further, a fiber manufacturing composition for manufacturing a fiber that retains organic solvent resistance and liquid medium resistance, and spinning the composition. And a cell culture scaffolding material using the fiber can be provided.
- Such a fiber expresses a more excellent function as a cell culture scaffold material by immobilizing a substance effective for cell adhesion, proliferation, differentiation and the like.
- composition for fiber production of the present invention (hereinafter also referred to as “the composition of the present invention”) is represented by (A) the unit structure represented by the general formula (1) and the general formula (2).
- the main feature is that it contains a polymer compound containing a unit structure, (B) a crosslinking agent, (C) an acid compound, and (D) a solvent.
- composition of the present invention comprises, as component A, a polymer compound containing a unit structure represented by general formula (1) and a unit structure represented by general formula (2) (hereinafter referred to as “polymer compound of component A” or (Also referred to simply as “component A”). Since the unit structure represented by the general formula (1) contained in Component A has a hydroxy group in the side chain, by spinning Component A together with a cross-linking agent and an acid compound, the hydroxy groups are linked via the cross-linking agent. By crosslinking reaction, the polymer compounds are crosslinked with each other, and a fiber having organic solvent resistance is obtained.
- the unit structure represented by the general formula (2) contained in Component A has an active ester group in the side chain
- a nucleophilic addition reaction with any amine protein, peptide, organic amine, etc.
- Substances that are effective for cell adhesion, proliferation, differentiation, etc. can be immobilized.
- the reaction between the active ester group having the unit structure represented by the general formula (2) and an arbitrary amine can be performed at the time of preparing the fiber production composition, and further, the fiber production composition is spun and heated. It can be performed even after processing.
- R 1 represents a hydrogen atom or a methyl group
- Q 1 represents an ester bond or an amide bond
- R 2 represents an alkyl group having 1 to 10 carbon atoms or an aromatic hydrocarbon group having 6 to 10 carbon atoms substituted with at least one hydroxy group.
- R 3 represents a hydrogen atom or a methyl group
- Q 2 represents an active ester group
- R 1 represents a hydrogen atom or a methyl group.
- Q 1 represents an ester bond or an amide bond, and is preferably an ester bond from the viewpoint of solubility of the polymer compound of Component A in a solvent.
- Q 2 represents an active ester group.
- the “active ester group” refers to an ester group in which a carbonyl group is activated (susceptible to nucleophilic attack) by having an electron-withdrawing substituent on one of the ester groups. Is an ester group represented by the general formula (5).
- Q 3 represents a monovalent organic group (electron withdrawing group) that forms an active ester group, and specific examples thereof include an N-succinimide group, a p-nitrophenyl group, and a pentafluorophenyl group. However, from the viewpoint of cell affinity, an N-succinimide group is preferable.
- R 2 represents an alkyl group having 1 to 10 carbon atoms or an aromatic hydrocarbon group having 6 to 10 carbon atoms in which at least one hydrogen atom is substituted with a hydroxy group.
- the alkyl group having 1 to 10 carbon atoms may be linear or branched, and specific examples thereof include methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, sec-butyl.
- the number of carbon atoms of the alkyl group is preferably 1-6, more preferably 1-4.
- Examples of the “aromatic hydrocarbon group having 6 to 10 carbon atoms” of the aromatic hydrocarbon group having 6 to 10 carbon atoms in which at least one hydrogen atom in R 2 is substituted with a hydroxy group include: , Phenyl group, 1-naphthyl group, 2-naphthyl group and the like.
- R 2 is preferably from 1 to 10 carbon atoms in which at least one hydrogen atom is substituted with a hydroxy group from the viewpoint of the crosslinking reaction efficiency during fiber production and the cell affinity of the produced fiber (more An alkyl group of 1 to 6, particularly preferably 1 to 4) or a phenyl group in which at least one hydrogen atom is substituted with a hydroxy group is preferable.
- R 3 represents a hydrogen atom or a methyl group.
- R 1 is a hydrogen atom or a methyl group
- Q 1 is an ester bond
- R 2 is substituted with at least one hydrogen atom by a hydroxy group.
- the unit structure represented by the general formula (1) is preferably a unit structure represented by the general formula (3).
- R 4 has the same meaning as R 1 above, and R 5 has the same meaning as R 2 above.
- the unit structure represented by the general formula (2) is preferably a unit structure represented by the general formula (4).
- R 6 represents a hydrogen atom or a methyl group.
- the polymer compound of component A may contain a unit structure other than the unit structure represented by the general formula (1) and the unit structure represented by the general formula (2), as long as the object of the present invention is not impaired.
- the ratio (mol%) of the unit structure represented by the general formula (1) to the total unit structure of the component A polymer compound is preferably 35 to 95 mol%.
- the proportion (mol%) of the unit structure represented by the general formula (2) is preferably 5 to 65 mol%.
- the total (mol%) of the ratio of the unit structure represented by the general formula (1) and the ratio of the unit structure represented by the general formula (2) to the total unit structure of the polymer compound of component A is From the viewpoint of polymerizability of the polymer compound, it is preferably more than 90 mol%, more preferably 95 mol% or more, and particularly preferably 100 mol%.
- the ratio of each unit structure to the total unit structure of the polymer compound of component A can be calculated from the composition ratio of each unit structure measured by 13 C-NMR.
- the weight average molecular weight of component A is preferably in the range of 1,000 to 1,000,000, more preferably 5,000 to 500,000, from the viewpoint of organic solvent resistance of the fiber using the above composition.
- the range is particularly preferably in the range of 10,000 to 300,000.
- “weight average molecular weight” means a molecular weight in terms of polystyrene measured by gel permeation chromatography (GPC).
- Component A can be produced by a method known per se or a method analogous thereto.
- a monomer corresponding to the unit structure represented by the general formula (1) and a monomer corresponding to the unit structure represented by the general formula (2) are mixed in an appropriate solvent (eg, acetonitrile).
- an appropriate solvent eg, acetonitrile
- It can be produced by polymerization using a suitable polymerization initiator (eg, 2,2′-azobis (isobutyric acid) dimethyl), but is not limited thereto.
- a suitable polymerization initiator eg, 2,2′-azobis (isobutyric acid) dimethyl
- Examples of the monomer corresponding to the unit structure represented by the general formula (1) include 2-hydroxyethyl (meth) acrylate (for example, a compound having CAS number: 868-77-9), 2-hydroxypropyl ( (Meth) acrylate (for example, a compound having CAS number: 923-26-2), 4-hydroxybutyl (meth) acrylate (for example, a compound having CAS number: 2478-10-6), N-hydroxymethyl (meth) acrylamide ( For example, a compound having CAS number: 923-02-4), N- (2-hydroxyethyl) (meth) acrylamide (for example, a compound having CAS number: 5238-56-2), N- (2-hydroxypropyl) ( (Meth) acrylamide (for example, a compound having CAS number: 26099-09-2), p-hydroxy (meth) acryl Anilide (for example, a compound having CAS number: 19243-95-9) and the like, 2-hydroxyethyl (meth) acrylate or
- Monomers corresponding to the unit structure represented by the general formula (2) include p-nitrophenyl (meth) acrylate (for example, a compound having CAS number: 16522-41-1), pentafluorophenyl (meth) acrylate. (For example, a compound having CAS number: 13642-97-2), N-acryloxysuccinimide (a compound having CAS number: 38862-24-7), N-succinimidyl methacrylate (CAS number: 38862-25-8) Compound), and N-succinimidyl methacrylate is most preferred.
- p-nitrophenyl (meth) acrylate for example, a compound having CAS number: 16522-41-1
- pentafluorophenyl (meth) acrylate for example, a compound having CAS number: 13642-97-2
- N-acryloxysuccinimide a compound having CAS number: 38862-24-7
- the content of component A in the composition of the present invention is preferably 5 to 50% by weight, more preferably 10 to 40% by weight, from the viewpoint of producing a fiber having an appropriate thickness.
- Component B The composition of the present invention contains, as component B, a crosslinking agent (hereinafter also referred to as “component B crosslinking agent” or simply “component B”).
- component B crosslinking agent hereinafter also referred to as “component B crosslinking agent” or simply “component B”.
- Component B when used in combination with Component C described below, can impart organic solvent resistance to the fiber by crosslinking the hydroxyl groups of Component A through Component B itself.
- crosslinking agent for Component B examples include aminoplast crosslinking agents such as 1,3,4,6-tetrakis (methoxymethyl) glycoluril and 1,3,4,6-tetrakis (butoxymethyl) glycoluril; Phenoplast crosslinking agents such as 2-bis (4-hydroxy-3,5-dihydroxymethylphenyl) propane; isocyanate crosslinking agents such as hexamethylene diisocyanate; vinyl ether crosslinking agents such as 1,4-bis (vinyloxy) butane; Can be mentioned.
- aminoplast crosslinking agents such as 1,3,4,6-tetrakis (methoxymethyl) glycoluril and 1,3,4,6-tetrakis (butoxymethyl) glycoluril
- Phenoplast crosslinking agents such as 2-bis (4-hydroxy-3,5-dihydroxymethylphenyl) propane
- isocyanate crosslinking agents such as hexamethylene diisocyanate
- vinyl ether crosslinking agents such as 1,4-bis (
- Component B is preferably an aminoplast crosslinker, preferably 1,3,4,6-tetrakis (hydroxymethyl) glycoluril (CAS number: 5395-50-6), 1,3,4,6-tetrakis.
- (Methoxymethyl) glycoluril CAS number: 17464-88-9
- 1,3,4,6-tetrakis ethoxymethyl glycoluril
- 1,3,4,6 -Tetrakis (1-methylethoxy) glycoluril (CAS number: 508220-69-7)
- 1,3,4,6-tetrakis butoxymethyl) glycoluril (CAS number: 15968-37-3)
- Component B may be used alone or in combination of two or more.
- the crosslinking agent of component B can be produced by a method known per se or a method analogous thereto. Moreover, you may use a commercial item.
- the content of component B is preferably 0.1 to 5% by weight, more preferably 0.2 to 3% by weight from the viewpoint of reaction efficiency with component A.
- the weight ratio of component A to component B (weight of component A / weight of component B) contained in the composition of the present invention is preferably 5 to 65, more preferably 5 to 25, from the viewpoint of reaction efficiency during fiber production. preferable.
- composition of the present invention contains, as component C, an acid compound (hereinafter also referred to as “acid compound of component C” or simply “component C”).
- the acid compound may be in the form of a salt, that is, the term “acid compound” in the present invention is a concept including a salt.
- Component C can be used together with Component B to promote the crosslinking reaction when the hydroxyl groups of Component A undergo a crosslinking reaction via Component B.
- Examples of the acid compound of component C include organic acid compounds such as sulfonic acid compounds and carboxylic acid compounds; inorganic acid compounds such as hydrochloric acid, phosphoric acid, sulfuric acid, nitric acid, and hydrobromic acid.
- Component C is preferably an organic acid compound, more preferably a sulfonic acid compound.
- the sulfonic acid compound include p-toluenesulfonic acid, pyridinium-p-toluenesulfonate, trifluoromethanesulfonic acid and the like, and pyridinium-p-toluenesulfonate is preferable.
- Component C may be used alone or in combination of two or more.
- the acid compound of component C can be produced by a method known per se or a method analogous thereto. Moreover, you may use a commercial item.
- the content ratio of Component C in the composition of the present invention is preferably 0.01 to 1.0% by weight, more preferably 0.05 to 0.5% by weight, from the viewpoint of the crosslinking reaction rate and the crosslinking reaction efficiency. 0.07 to 0.4% by weight is particularly preferred.
- the weight ratio of component A to component C (weight of component A / weight of component C) contained in the composition of the present invention is preferably 20 to 120, and preferably 80 to 115 from the viewpoints of crosslinking reaction rate and crosslinking reaction efficiency. More preferred.
- composition of the present invention contains, as component D, a solvent (hereinafter also referred to as “solvent of component D” or simply “component D”).
- the solvent of component D is not particularly limited as long as it can uniformly dissolve or disperse at least the components A to C and does not react with each component, but from the viewpoint of solubility of components A to C, a polar solvent Is preferred.
- the polar solvent include water, methanol, ethanol, 2-propanol, propylene glycol monomethyl ether, acetone, dimethylformamide, dimethylacetamide, N-methylpyrrolidone, and the like for ease of spinning the composition.
- Component D may be used alone or in combination of two or more.
- composition of the present invention may contain, in addition to components A to D, additives that are usually used in a fiber production composition, if necessary, as long as the object of the present invention is not significantly impaired.
- additives include a surfactant, a rheology modifier, a drug, and fine particles.
- composition of the present invention can be prepared by mixing the above components A to D, or mixing the components A to D and the above additives.
- the mixing method is not particularly limited, and may be mixed by a method known per se or a method analogous thereto.
- the composition of the present invention is used for fiber production.
- the type of fiber produced using the composition of the present invention is not particularly limited.
- a biocompatible material eg, cell culture scaffold material
- nanofiber, microfiber, etc. are preferable, Nanofibers are more preferred.
- nanofiber means a fiber having a diameter of nanometer order (eg, 1 to 1000 nm)
- microfiber has a diameter of micrometer order (eg, 1 to 1000 ⁇ m). Refers to fiber.
- the diameter of the fiber formed using the composition of the present invention may be appropriately adjusted according to the use of the fiber, etc., but from the viewpoint of the concentration of the composition of the present invention and the ease of spinning, 1 to 1000 nm is preferable, and 10 to 1000 nm is more preferable. In the present invention, the diameter of the fiber is measured with a scanning electron microscope (SEM).
- the production method of the fiber, the fiber produced by the production method, the production method of the fiber of the present invention includes the step of spinning the composition of the present invention.
- the spinning method of the composition of the present invention is not particularly limited as long as it can form a fiber, and examples thereof include a melt blowing method, a composite melt spinning method, an electrospinning method, and the like. Is preferred.
- the electrospinning method is a known spinning method and can be performed using a known electrospinning apparatus.
- Speed discharge speed
- the discharge rate is usually from 0.1 to 100 ⁇ l / min, preferably from 0.5 to 50 ⁇ l / min, more preferably from 1 to 20 ⁇ l / min.
- the applied voltage is usually 0.5 to 80 kV, preferably 1 to 60 kV, more preferably 3 to 40 kV.
- the discharge distance is usually 1 to 60 cm, preferably 2 to 40 cm, more preferably 3 to 30 cm.
- the method of the present invention preferably further includes a step of heating the spun fiber at a specific temperature after spinning the composition of the present invention. By heating the spun fiber at a specific temperature, better organic solvent resistance can be developed.
- the temperature at which the spun fiber is heated is usually in the range of 70 to 300 ° C., and preferably 80 to 250 ° C. from the viewpoint of the reactivity of the crosslinking agent of component B and the heat resistance of the polymer compound of component A. More preferably, the temperature is 90 to 200 ° C. When the temperature is less than 70 ° C., the crosslinking reaction between the components A is insufficient, and the resistance of the produced fiber to the organic solvent tends to be low. Fibers cannot be formed due to thermal decomposition or dissolution.
- the method for heating the spun fiber is not particularly limited as long as it can be heated at the above heating temperature, and can be appropriately heated by a method known per se or a method analogous thereto.
- Specific examples of the heating method include a method using a hot plate or an oven in the atmosphere.
- the time for heating the spun fiber can be appropriately set according to the heating temperature or the like, but from the viewpoint of the crosslinking reaction rate and production efficiency, it is preferably 1 minute to 48 hours, more preferably 5 minutes to 36 hours, and 10 minutes. ⁇ 24 hours is particularly preferred.
- the type of fiber produced by the method of the present invention (hereinafter also referred to as “the fiber of the present invention”) is not particularly limited.
- a biocompatible material eg, cell culture scaffolding material, etc.
- Nanofibers, microfibers and the like are preferable, and nanofibers are more preferable.
- the diameter of the fiber of the present invention may be appropriately adjusted according to the use of the fiber.
- it when used as a cell culture scaffold material, it is preferably 1 to 1000 nm from the viewpoint of cell culture efficiency, and 10 to 1000 nm. Is more preferable.
- the fiber of the present invention has excellent organic solvent resistance and has a sufficient function as a cell culture scaffold. Suitable for cell culture scaffold materials.
- a carrier substance (cell adhesion substance) effective for cell adhesion / proliferation / differentiation can be immobilized on the fiber by a reaction between the active ester group present in the fiber of the present invention and the cell adhesion substance.
- the active ester group reacts with the free primary amino group under neutral conditions.
- the basicity of primary amines is stronger for alkylamines than aromatic amines, and alkylamines are more suitable for reaction with active esters.
- reaction conditions are 0 to 37 ° C. for 1 to 48 hours, more preferably 0 to 37 ° C. for 1 to 24 hours.
- Examples of the substance (cell adhesion substance) that can be immobilized on the fiber of the present invention include proteins, physiologically active substances, and compounds.
- Examples of the protein include carcinoembryonic antigen, squamous cell carcinoma-related antigen, cytokeratin 19 fragment, sialylated sugar chain antigen KL-6, natriuretic peptide, troponin, myoglobin and other disease markers, interleukin-1 (IL -1), interleukin-2 (IL-2), interleukin-3 (IL-3), interleukin-4 (IL-4), interleukin-5 (IL-5), interleukin-6 (IL -6), interleukin-7 (IL-7), interleukin-8 (IL-8), interleukin-9 (IL-9), interleukin-10 (IL-10), interleukin-11 (IL -11), interleukin-12 (IL-12), interleukin-13 (IL-13), interleukin-14 (IL-14), interleukin-15 (IL-15), interleukin-18 (IL-18),
- physiologically active substance examples include D-glucosamine, D-galactosamine, neuraminic acid, hyaluronic acid, chondroitin sulfate, heparan sulfate, heparin and other sugars, serotonin, noradrenaline, adrenaline, 3- (3,4-dichlorophenyl)- Examples thereof include 1,1-dimethylurea (DCMU), atrazine, linuron, and simazine.
- DCMU 1,1-dimethylurea
- Examples of the compound include angiotensin I to IV, bradykinin, fibrinopeptide, natriuretic peptide, urodilatin, guanylin, endothelin 1 to 3, salusin, urotensin, oxytocin, neurophysin, vasopressin, adrenocorticotropic hormone, melanocyte Stimulating hormone, Endorphin, Lipotropin, Urocortin 1 to 3, Luteinizing hormone releasing hormone, Growth hormone releasing hormone, Somatostatin, Cortisatin, Prolactin releasing peptide, Metastin, Tachykinin, Substance P, Neurokinin, Endokinin, Neurotensin, Neuromedin, Zenin , Ghrelin, obestatin, melanin-concentrating hormone, orexin, neuropeptide, dynorphin, neoendol Peptides such as phenine, endomorphine, nociceptin, py
- the cell culture scaffold material of the present invention is mainly characterized by containing the fiber of the present invention.
- the “cell culture scaffold material” refers to a material that does not adversely affect cells and can be cultured.
- the cell culture scaffold material of the present invention includes, for example, a cell culture substrate (for example, a 6-hole flat bottom microplate) obtained by spraying the fiber of the present invention on a plastic such as glass, metal, and polystyrene, and the fiber of the present invention. And culture bags into which is introduced. Furthermore, cell growth can be promoted and cell differentiation can be induced by a substance (cell adhesion substance) immobilized through an active ester group.
- a cell culture substrate for example, a 6-hole flat bottom microplate
- a plastic such as glass, metal, and polystyrene
- culture bags into which is introduced.
- cell growth can be promoted and cell differentiation can be induced by a substance (cell adhesion substance) immobilized through an active ester group.
- the cells cultured using the cell culture scaffold material of the present invention are not particularly limited.
- the cell culture scaffold material of the present invention can be produced by a method known per se or a method analogous thereto, using the fiber of the present invention as one of the raw materials.
- the reaction mixture was concentrated to an amount of about 100 ml, and diethyl ether was added to precipitate a polymer.
- the polymer was collected by filtration and then dried under reduced pressure to obtain 36.0 g of polymer compound 3.
- the weight average molecular weight of the polymer compound 3 was 182,000 in terms of polystyrene.
- Table 1 summarizes the cases where the polymer compounds 1 to 5 were in a uniform polymer solution after the polymerization reaction as “good” and the case where the polymer compound was not in a uniform polymer solution was “bad”.
- Example 1 Preparation of composition for fiber production (solution)> (Example 1) Polymer Compound 1; 0.50 g, 1,3,4,6-tetrakis (methoxymethyl) glycoluril 0.03 g, pyridinium-p-toluenesulfonate 0.005 g, dimethylacetamide 0.49 g, and acetone 1.48 g After mixing, the mixture was stirred at 100 rpm until dissolved in a mix rotor VMR-5 (manufactured by ASONE Co., Ltd.) to obtain a composition for producing fibers of Example 1. The content rate of the high molecular compound 1 in the composition for fiber manufacture of Example 1 is about 20 weight%.
- Example 2 Polymer compound 2; 0.70 g, 1,3,4,6-tetrakis (methoxymethyl) glycoluril 0.04 g, pyridinium-p-toluenesulfonate 0.007 g, dimethylacetamide 0.31 g, and acetone 0.94 g After mixing, the mixture was stirred at 100 rpm until dissolved in a mix rotor VMR-5 (manufactured by ASONE Co., Ltd.) to obtain a composition for producing fibers of Example 1. The content rate of the high molecular compound 2 in the composition for fiber manufacture of Example 2 is about 35 weight%.
- Example 3 Polymer compound 3; 0.23 g, 1,3,4,6-tetrakis (methoxymethyl) glycoluril 0.01 g, pyridinium-p-toluenesulfonate 0.002 g, dimethylacetamide 0.50 g, and acetone 1.52 g After mixing, the mixture was stirred at 100 rpm until dissolved with a mix rotor VMR-5 (manufactured by ASONE Co., Ltd.) to obtain a composition for producing a fiber of Example 3.
- the content rate of the high molecular compound 3 in the composition for fiber manufacture of Example 3 is about 10 weight%.
- Example 4 Polymer compound 3; 0.60 g, 1,3,4,6-tetrakis (methoxymethyl) glycoluril 0.03 g, pyridinium-p-toluenesulfonate 0.006 g, dimethylacetamide 0.59 g, and acetone 1.77 g After mixing, the mixture was stirred at 100 rpm until dissolved with a mix rotor VMR-5 (manufactured by ASONE Co., Ltd.) to obtain a composition for producing fibers of Example 4. The content rate of the high molecular compound 3 in the composition for fiber manufacture of Example 4 is about 20 weight%.
- Example 5 Polymer compound 3; 0.40 g, 1,3,4,6-tetrakis (methoxymethyl) glycoluril 0.06 g, pyridinium-p-toluenesulfonate 0.004 g, dimethylacetamide 0.38 g, and acetone 1.15 g After mixing, the mixture was stirred at 100 rpm until dissolved with a mix rotor VMR-5 (manufactured by ASONE Co., Ltd.) to obtain a composition for producing a fiber of Example 5.
- the content rate of the high molecular compound 3 in the composition for fiber manufacture of Example 5 is about 20 weight%.
- Example 6 Polymer compound 4; 0.50 g, 1,3,4,6-tetrakis (methoxymethyl) glycoluril 0.03 g, pyridinium-p-toluenesulfonate 0.005 g, dimethylacetamide 0.49 g, and acetone 1.48 g After mixing, the mixture was stirred at 100 rpm until dissolved with a mix rotor VMR-5 (manufactured by ASONE Co., Ltd.) to obtain a composition for producing fibers of Example 6. The content rate of the high molecular compound 4 in the composition for fiber manufacture of Example 6 is about 20 weight%.
- Example 7 Polymer compound 5; 0.50 g, 1,3,4,6-tetrakis (methoxymethyl) glycoluril 0.03 g, pyridinium-p-toluenesulfonate 0.005 g, dimethylacetamide 0.49 g, and acetone 1.48 g After mixing, the mixture was stirred at 100 rpm until dissolved with a mix rotor VMR-5 (manufactured by ASONE Co., Ltd.) to obtain a composition for producing a fiber of Example 7. The content rate of the high molecular compound 5 in the composition for fiber manufacture of Example 7 is about 20 weight%.
- Tables 2-1 and 2-2 show the structures of the fiber manufacturing compositions of Examples 1 to 7 and Comparative Examples 1 to 4.
- PL-LI 1,3,4,6-tetrakis (methoxymethyl) glycoluril
- PyPTS pyridinium-p-toluenesulfonate
- DMAc dimethylacetamide
- ⁇ Test Example 1 Heat treatment and solvent resistance test>
- the fiber manufacturing compositions of Examples 1 to 7 and Comparative Examples 1 to 4 were spun on aluminum foil by electrospinning immediately after preparation, and then the resulting fibers were heat-treated under the conditions shown in Table 3. The fiber shape after the heat treatment was confirmed. The results are shown in Table 3.
- the fiber manufacturing compositions of Examples 1 to 7 and Comparative Examples 1 to 4 were spun onto an aluminum foil by electrospinning immediately after preparation, and then subjected to heat treatment under the conditions shown in Table 4 as ethanol. Then, the fiber shape was confirmed again and the fiber diameter was measured. The results are shown in Table 4.
- Example 4 and Comparative Examples 1 to 3 were spun onto an aluminum foil by electrospinning immediately after preparation, and then subjected to heat treatment under the conditions shown in Table 5 in a liquid medium. After being immersed in a certain ISCOVE'S MODIFIED DULBECCO'S MEDIUM (manufactured by Sigma) for 7 days, the fiber shape was confirmed again through water washing and ethanol washing, and the fiber diameter was measured. The results are shown in Table 5.
- the fibers produced by the electrospinning method using the compositions for producing fibers of Examples 1 to 7 and Comparative Examples 1 to 4 were subjected to heat treatment alone, and the composition ratio of NSuMA / HPMA was It was a good shape regardless of the molecular weight of the polymer compound, the content of the polymer compound, and the content of the crosslinking agent. From the results in Table 4, the fibers produced using the fiber production compositions of Examples 1 to 7 showed a good shape even after the heat treatment and further immersed in ethanol for 10 seconds. In Example 7, a good fiber shape was shown, but a wide range of fiber diameters was observed.
- Example 4 Even when the heating temperature in the heat treatment was 80 ° C., a good fiber shape was shown. From the results in Table 5, the fiber produced using the fiber production composition of Example 4 showed a good fiber shape even after being immersed in a cell culture liquid medium for 7 days. That is, when a fiber is produced by spinning the fiber production composition of the present invention, heat treatment is performed at 80 ° C. or higher in order to obtain a fiber having a good fiber shape and excellent organic solvent resistance and medium resistance. It is desirable to do.
- the fiber diameter of the produced fiber is the weight average molecular weight of the polymer compound of component A and the content ratio of the polymer compound of component A in the fiber production composition. It was suggested that it depends on. Therefore, by adjusting the weight average molecular weight of the polymer compound of component A and the content ratio of the polymer compound of component A in the fiber manufacturing composition, it is possible to obtain fibers having a desired fiber diameter.
- Example 2 Cell culture evaluation 1> The fiber production compositions of Example 1 and Comparative Example 4 were spun by the electrospinning method, and then cell culture evaluation was performed on the obtained fibers. In the following, the concentration (%) of CO 2 in the CO 2 incubator is indicated by volume% of CO 2 in the atmosphere.
- Example 1 The fiber production composition of Example 1 was spun by electrospinning, sprayed on a glass substrate for 20 minutes, and then heat-treated at 180 ° C. for 30 minutes. A micro cover glass (manufactured by Matsunami Glass Co., Ltd.) ( ⁇ 32 mm, thickness about 0.5 mm) was used for the glass substrate. The obtained fiber was washed with ethanol and air-dried, and then the fiber shape was confirmed with a scanning electron microscope (SEM). The fiber diameter of the fiber obtained from the fiber manufacturing composition of Example 1 was about 430 nm.
- the glass substrate on which fibers are formed by spinning the composition for fiber production of Example 1 is referred to as “fiber substrate of Example 1” for convenience.
- Human embryonic kidney cell line HEK293 (DS Pharma Biomedical Co., Ltd.) was used as the cell.
- the medium used for cell culture is EMEM (Eagle's Minimum Essential Medium) medium containing 10% (v / v) FBS and 1% (v / v) NEAA (Non-Essential Amino Acids) (manufactured by GIBCO). (Wako Pure Chemical Industries, Ltd.) was used.
- the cells were statically cultured for 2 days or more using a 10 cm diameter petri dish (medium 10 mL) in a state where 5% carbon dioxide concentration was maintained in a 37 ° C. CO 2 incubator.
- trypsin-EDTA ethylenediaminetetraacetic acid
- Wako Pure Chemical Industries, Ltd. trypsin-EDTA (ethylenediaminetetraacetic acid) solution
- PBS phosphate buffered saline
- FBS fetal bovine serum
- Example 1 [Immobilization of cell adhesion substances]
- the fiber substrate of Example 1 was placed on a 6-hole flat bottom microplate, and 2 mL of 70% ethanol was added and immersed for 5 minutes at room temperature. After removing this solution and air-drying, 2 mL of laminin 521 (manufactured by BioLamina) / PBS solution (20 ⁇ g / mL) was added per well. The mixture was allowed to stand in a 37 ° C. incubator for 2 hours to immobilize laminin, the solution was removed, and the well was washed twice with 2 mL of PBS per well.
- laminin 521 manufactured by BioLamina
- PBS solution 20 ⁇ g / mL
- [Cell culture] A sterilized fiber substrate of Example 1, a fiber substrate of Comparative Example 4, an untreated glass substrate, and a fiber substrate of Example 1 on which laminin 521 is immobilized are placed on a 6-hole flat-bottom microplate. Washed twice. Then, after adding 2 mL each of the cell suspension of HEK293 (human embryonic kidney cells) prepared to 2.0 ⁇ 10 5 cells / well, CO 2 was maintained at 37 ° C. for 24 hours while maintaining 5% carbon dioxide concentration. It left still in 2 incubators.
- HEK293 human embryonic kidney cells
- Example 3 Cell culture evaluation 2> The fiber production composition of Example 5 was spun by an electrospinning method, and then cell culture evaluation was performed on the obtained fiber. The cell culture method was performed according to Test Example 2.
- the composition for producing a fiber of Example 5 was spun by an electrospinning method, sprayed on a ⁇ 30 mm polystyrene (PS) substrate for 20 minutes, and then heat-treated at 80 ° C. for 24 hours.
- the ⁇ 30 mm PS substrate was made by itself from “Pravan” (trade name; thickness 0.2 mm) manufactured by Acrisandy Co., Ltd.
- the obtained fiber was washed with ethanol and air-dried, and then the fiber shape was confirmed with a scanning electron microscope (SEM).
- the fiber diameter of the fiber obtained from the fiber manufacturing composition of Example 5 was about 470 nm.
- the PS substrate on which fibers are formed by spinning the fiber manufacturing composition of Example 5 is referred to as “fiber substrate of Example 5” for convenience.
- Example 5 [Immobilization of cell adhesion substances]
- the fiber substrate of Example 5 was placed on a 6-hole flat-bottom microplate, and 2 mL of YIGSR peptide (manufactured by Bex Corporation) / PBS solution (0.05 wt%) was added per well. After allowing to stand at room temperature for 24 hours to immobilize the peptide, the solution was removed and the well was washed twice with 2 mL of PBS per well.
- YIGSR peptide manufactured by Bex Corporation
- PBS solution 0.05 wt%
- [Cell culture] A sterilized fiber substrate of Example 5, a fiber substrate of Example 5 on which peptides were immobilized, and an untreated PS substrate as a control were placed in a 6-hole flat bottom microplate, and washed twice with 2 mL of medium. Then, after adding 2 mL each of the cell suspension of HEK293 (human embryonic kidney cells) prepared to 2.0 ⁇ 10 5 cells / well, CO 2 was maintained at 37 ° C. for 24 hours while maintaining 5% carbon dioxide concentration. It left still in 2 incubators.
- HEK293 human embryonic kidney cells
- Example 4 Cell culture evaluation 3> The fiber production compositions of Example 4 and Comparative Example 4 were spun by the electrospinning method, and then cell culture evaluation was performed on the obtained fibers. In the following, the concentration (%) of CO 2 in the CO 2 incubator is indicated by volume% of CO 2 in the atmosphere.
- Example 4 The fiber production composition of Example 4 was spun by electrospinning, sprayed on a glass substrate for 20 minutes, and then heat-treated at 180 ° C. for 30 minutes. A micro cover glass (manufactured by Matsunami Glass Co., Ltd.) ( ⁇ 32 mm, thickness about 0.5 mm) was used for the glass substrate. The obtained fiber was washed with ethanol and air-dried, and then the fiber shape was confirmed with a scanning electron microscope (SEM). The fiber diameter of the fiber obtained from the composition for producing a fiber of Example 4 was about 450 nm.
- the glass substrate on which fibers are formed by spinning the composition for producing fibers of Example 4 is referred to as “fiber substrate of Example 4” for convenience.
- mTeSR1 manufactured by Veritas Co., Ltd.
- mTeSR1 / 10 ⁇ M Y27632 medium containing Y-27632 (manufactured by Wako Pure Chemical Industries, Ltd.) having a final concentration of 10 ⁇ M.
- the cell suspension was made into a single cell by pipetting and then centrifuged at room temperature for 1000 rpm / 3 minutes.
- NC-200 NucleoCounter NC-200 (hereinafter NC-200; manufactured by ChemoMetec AS).
- Example 4 The fiber substrate of Example 4 and the fiber substrate of Comparative Example 4 were placed on a 6-hole flat-bottom microplate (manufactured by BD Bioscience), washed with 1 mL of 100% ethanol three times, and then air-dried. Then, it was washed 3 times with 1 mL of Dulbecco's Modified Eagle Medium: Nutrient Mixture F-12 (DMEM / F-12; manufactured by Sigma Aldrich).
- DMEM / F-12 Nutrient Mixture F-12
- DMEM Washed once with 1 mL of / F-12 solution To the glass substrate, 1 mL of Matrigel solution diluted 75-fold with DMEM / F-12 was added, and after standing at 37 ° C. for 2 hours or overnight at 4 ° C., it was washed once with 1 mL of DMEM / F-12 solution. .
- [Cell culture] A 6-hole flat bottom microplate (manufactured by BD Bioscience), a sterilized fiber substrate of Example 4, a sterilized fiber substrate of Comparative Example 4, a fiber substrate of Example 4 in which laminin 511 is immobilized, and Matrigel (manufactured by Corning) Then, a suspension of human ES cells or human iPS cells was added to 1.5 to 2.0 ⁇ 10 5 cells / well. After 37 hours at 37 ° C. (culture day 1), the medium was replaced with 1.5 mL of mTeSR1 / 10 ⁇ M Y27632 medium. From the second day of culture to the fourth day of culture, the medium was changed with 1.5 mL of mTeSR1 medium. During the culture period, the sample was allowed to stand in a CO 2 incubator at 37 ° C. while maintaining a 5% carbon dioxide concentration.
- the fiber substrate of Example 4 was more effective for culturing human ES cells and human iPS cells than the fiber substrate of Comparative Example 4.
- the cell growth rate of the fiber substrate of Example 4 in which laminin 511 was immobilized and BR> was similar to the cell growth rate of the glass substrate coated with matrigel, and the cell adhesion substance was fixed to the fiber substrate. It has been found that it is effective for cell culture.
- the cell viability of the fiber substrate of Example 4 in which laminin 511 was immobilized and the fiber substrate of Example 4 was about 20% that of the glass substrate coated with Matrigel. it was high. From this result, it was found that the fiber of the present invention is effective for cell culture.
- a composition for producing a fiber suitable for immobilizing a substance effective for cell adhesion, proliferation, differentiation, etc., and for producing a fiber that retains resistance to organic solvents, A fiber obtained by spinning, and a cell culture scaffold material using the fiber can be provided.
- Such a fiber expresses a more excellent function as a cell culture scaffold material by immobilizing a substance effective for cell adhesion, proliferation, differentiation and the like.
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Abstract
Description
このうち、電界紡糸法(エレクトロスピニング)と呼ばれる高電圧をかけながら繊維を吹き付ける方法によって、ナノレベルの繊維径を持つナノ繊維(ナノファイバー)で構成された構造体が細胞培養足場材料として注目を浴びている。そのナノ繊維上で細胞医療や再生医療に使用する機能細胞や多能性幹細胞の未分化性を保持したまま培養する試みが多数なされている(非特許文献1~非特許文献3参照)。しかしながら、このような合成高分子由来の繊維は細胞接着性や増殖性を付与することが難しく、生体内の環境を模倣しているとは言えない。
また本発明者らは、上記繊維製造用組成物の紡糸は、活性エステル基とヒドロキシ基を側鎖に有する高分子化合物を架橋剤及び酸化合物とともに紡糸することから、高分子化合物に含まれるヒドロキシ基同士が架橋剤を介して架橋反応することにより、高分子化合物同士が架橋する結果、有機溶剤耐性、液体培地耐性を有する繊維が得られることを見出した。
また、本発明者らは、本発明の繊維製造用組成物を紡糸して製造した繊維は、加熱処理を施すことにより、より優れた有機溶剤耐性、液体培地耐性を発現することを見出した。
これらの知見に基づき、本発明者らは本発明を完成するに至った。
(B)架橋剤、
(C)酸化合物、及び
(D)溶剤
を含有する繊維製造用組成物。
R1は、水素原子又はメチル基を示し、
Q1は、エステル結合又はアミド結合を示し、
R2は、少なくとも1個の水素原子がヒドロキシ基で置換されている炭素原子数1~10のアルキル基又は炭素原子数6~10の芳香族炭化水素基を示す。〕
R3は、水素原子又はメチル基を示し、
Q2は、活性エステル基を示す。〕
[2] 上記Q2が、一般式(5)で表される、上記[1]に記載の組成物。
[3] 上記高分子化合物の重量平均分子量が、1,000~1,000,000である、上記[1]又は[2]に記載の組成物。
[4] 上記溶剤が、極性溶剤である、上記[1]~[3]のいずれか1つに記載の組成物。
[5] 上記[1]~[4]のいずれか1つに記載の組成物を紡糸する工程を含む、繊維の製造方法。
[6] 上記紡糸が、電界紡糸である、上記[5]記載の方法。
[7] 紡糸した繊維を、70~300℃の範囲で加熱する工程を含む、上記[5]又は[6]記載の方法。
[8] さらに細胞接着物質を固定化する工程を含む、上記[5]~[7]のいずれか1つに記載の方法。
[9] 上記[5]~[8]のいずれか1つに記載の方法で製造される繊維。
[10] 上記[9]記載の繊維を含む、細胞培養足場材料。
本発明の繊維製造用組成物(以下、「本発明の組成物」とも称する)は、(A)一般式(1)で表される単位構造及び一般式(2)で表される単位構造を含む高分子化合物、(B)架橋剤、(C)酸化合物、及び(D)溶剤を含有することを、主たる特徴とする。
本発明の組成物は成分Aとして、一般式(1)で表される単位構造及び一般式(2)で表される単位構造を含む高分子化合物(以下、「成分Aの高分子化合物」又は単に「成分A」とも称する)を含有する。成分Aに含まれる一般式(1)で表される単位構造は、側鎖にヒドロキシ基を有するため、成分Aを架橋剤及び酸化合物とともに紡糸することにより、ヒドロキシ基同士が架橋剤を介して架橋反応することにより高分子化合物同士が架橋し、有機溶剤耐性を有する繊維が得られる。また、成分Aに含まれる一般式(2)で表される単位構造は、側鎖に活性エステル基を有するため、任意のアミン(タンパク質、ペプチド、有機アミンなど)との求核付加反応によって、細胞の接着・増殖・分化などに有効な物質(細胞接着物質)を固定化することができる。一般式(2)で表される単位構造の活性エステル基と任意のアミンとの反応は、繊維製造用組成物の調製時に行うことが可能であり、さらに繊維製造用組成物を紡糸後、加熱処理後でも行うことが可能である。
R1は、水素原子又はメチル基を示し、
Q1は、エステル結合又はアミド結合を示し、
R2は、少なくとも1個のヒドロキシ基で置換されている炭素原子数1~10のアルキル基又は炭素原子数6~10の芳香族炭化水素基を示す。〕
R3は、水素原子又はメチル基を示し、
Q2は、活性エステル基を示す。〕
また、R2における少なくとも1個の水素原子がヒドロキシ基で置換されている炭素原子数6~10の芳香族炭化水素基の「炭素原子数6~10の芳香族炭化水素基」としては、例えば、フェニル基、1-ナフチル基、2-ナフチル基等が挙げられる。
R2は、繊維製造時における架橋反応効率や、製造された繊維の細胞親和性の観点から、好ましくは、少なくとも1個の水素原子がヒドロキシ基で置換されている炭素原子数1~10(より好ましくは1~6、特に好ましくは1~4)のアルキル基又は少なくとも1個の水素原子がヒドロキシ基で置換されているフェニル基である。
成分Aの高分子化合物は、本発明の目的を損なわない限り、一般式(1)で表される単位構造及び一般式(2)で表される単位構造以外の単位構造を含んでもよいが、成分Aの高分子化合物の重合性の観点から、成分Aの高分子化合物の全単位構造に対する一般式(1)で表される単位構造の割合(モル%)は、35~95モル%が好ましく、一般式(2)で表される単位構造の割合(モル%)は、5~65モル%が好ましい。また成分Aの高分子化合物の全単位構造に対する一般式(1)で表される単位構造の割合と一般式(2)で表される単位構造の割合との合計(モル%)は、成分Aの高分子化合物の重合性の観点から、90モル%を超えることが好ましく、95モル%以上がより好ましく、100モル%が特に好ましい。成分Aの高分子化合物の全単位構造に対する各単位構造の割合は、13C-NMRにより測定される各単位構造の組成比から算出できる。
なお、本発明において「(メタ)アクリレート化合物」とは、アクリレート化合物とメタクリレート化合物の両方をいう。例えば、(メタ)アクリル酸は、アクリル酸とメタクリル酸の両方をいう。
本発明の組成物は成分Bとして、架橋剤(以下、「成分Bの架橋剤」又は単に「成分B」とも称する)を含有する。成分Bは、後述の成分Cと併用することにより、成分Aのヒドロキシ基同士を、成分B自身を介して架橋させることで、繊維に有機溶剤耐性を付与することができる。
本発明の組成物は成分Cとして、酸化合物(以下、「成分Cの酸化合物」又は単に「成分C」とも称する)を含有する。当該酸化合物は塩の態様であってもよく、即ち、本発明における「酸化合物」なる用語は、塩をも包含する概念である。成分Cは、成分Bと併用することにより、成分Aのヒドロキシ基同士が成分Bを介して架橋反応する際にその架橋反応を促進させることができる。
本発明の組成物は成分Dとして、溶剤(以下、「成分Dの溶剤」又は単に「成分D」とも称する)を含有する。
当該極性溶剤としては、例えば、水、メタノール、エタノール、2-プロパノール、プロピレングリコールモノメチルエーテル、アセトン、ジメチルホルムアミド、ジメチルアセトアミド、N-メチルピロリドン等が挙げられ、組成物の紡糸し易さのため、好ましくはアセトンとジメチルアセトアミドの混合溶媒であり、その好ましい混合比率(重量%)は、アセトン/ジメチルアセトアミド=(90重量%~60重量%)/(10重量%~40重量%)である。
本発明の繊維の製造方法(以下、「本発明の方法」とも称する)は、本発明の組成物を紡糸する工程を含むことを、主たる特徴とする。
活性エステル基は、中性の条件で遊離一級アミノ基と反応する。一級アミンの塩基性は、芳香族アミンよりアルキルアミンが強く、アルキルアミンは活性エステルとの反応により適している。蛋白質及びペプチドを、それらのアミノ基を介して共有結合的に繊維に付加させる場合には、水系での反応が必須であり、反応溶液のpHが中性から弱アルカリ性領域にある場合や、反応温度が氷冷下から37℃程度である場合に、短時間に反応が進む。水溶性の低い一級アミンの場合には、エタノールやジメチルスルホキシド等のような有機溶剤に溶解して反応させることが好ましい。
好ましい反応条件は0℃~37℃で1~48時間、さらに好ましくは0℃~37℃で1~24時間である。
前記生理活性物質としては、例えば、D-グルコサミン、D-ガラクトサミン、ノイラミン酸、ヒアルロン酸、コンドロイチン硫酸、ヘパラン硫酸、ヘパリン等の糖類、セロトニン、ノルアドレナリン、アドレナリン、3-(3,4-ジクロロフェニル)-1,1-ジメチルウレア(DCMU)、アトラジン、リニュロン及びシマジン等が挙げられる。
前記化合物としては、例えば、アンジオテンシンI乃至IV、ブラジキニン、フィブリノペプチド、ナトリウム利尿ペプチド、ウロディラチン、グアニリン、エンドセリン1乃至3、サリューシン、ウロテンシン、オキシトシン、ニューロフィジン、バソプレシン、副腎皮質刺激ホルモン、メラニン細胞刺激ホルモン、エンドルフィン、リポトロピン、ウロコルチン1乃至3、黄体形成ホルモン放出ホルモン、成長ホルモン放出ホルモン、ソマトスタチン、コルチスタチン、プロラクチン放出ペプチド、メタスチン、タキキニン、サブスタンスP、ニューロキニン、エンドキニン、ニューロテンシン、ニューロメジン、ゼニン、グレリン、オベスタチン、メラニン凝集ホルモン、オレキシン、ニューロペプチド、ダイノルフィン、ネオエンドルフィン、エンドモルフィン、ノシセプチン、ピログルタミル化RF アミドペプチド、ガラニン、ガストリン、コレシストキニン、セクレチン、リラキシン、グルカゴン、グリセンチン、アドレノメデュリン、アミリン、カルシトニン、副甲状腺ホルモン、ディフェンシン、チモシン、YIGSRペプチド等のペプチド;アラニン、アルギニン、アスパラギン、アスパラギン酸、システイン、グルタミン、グルタミン酸、グリシン、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、プロリン、セリン、トレオニン、トリプトファン、チロシン、バリン、シスチン、ヒドロキシプロリン、ヒドロキシリジン、ジヒドロキシフェニルアラニン、チロキシン、フォスフォセリン、デスモシン、β-アラニン、サルコシン、オルニチン、クレアチン、γ-アミノ酪酸、テアニン、カイニン酸、ドウモイ酸、イボテン酸等のアミノ酸;2-ジメチルアミノエチルアミン(CAS番号:108-00-9の化合物)、N-(2-ヒドロキシエチル)エチレンジアミン(CAS番号:111-41-1の化合物)、N-(2-アミノエチル)ピペラジン(CAS番号:140-31-8の化合物)、4-(2-アミノエチル)モルホリン(CAS番号:2038-03-1の化合物)、1-(2-アミノエチル)-2-イミダゾリドン(CAS番号:6281-42-1の化合物)、トリプトアミン(CAS番号:61-54-1の化合物)、ヒスタミン二塩酸塩(CAS番号:56-92-8の化合物)、チラミン(CAS番号:51-67-2の化合物)、ドーパミン(CAS番号:51-61-6の化合物)等の一級アミン;エチレンジアミン二塩酸塩(CAS番号:333-18-6の化合物)、1,6-ジアミノヘキサン(CAS番号:124-09-4の化合物)、N,N’-ビス(アミノプロピル)ピペラジン(CAS番号:7209-38-3の化合物)の一級ジアミン等が挙げられる。
この中で特に好ましい細胞接着物質は、ラミニン511、ラミニン521又はYIGSRペプチドである。
本発明の細胞培養足場材料は、本発明の繊維を含むことを、主たる特徴とする。本発明において「細胞培養足場材料」とは、細胞に対して悪影響を及ぼさず、細胞培養が可能な材料をいう。
下記の高分子化合物1~6の重量平均分子量は、ゲルパーミエーションクロマトグラフィー(GPC)により測定した。測定に用いた装置、測定条件は次の通りである。
装置:TOSOH HLC-8320GPC system
カラム:Shodex(登録商標)KF-803L、KF-802及びKF-801
カラム温度:40℃
溶離液:DMF
流量:0.6ml/分
検出器:RI
標準試料:ポリスチレン
下記成分Aの高分子化合物の単位構造の組成比は、13C-NMRにより測定した。測定及び解析に用いた装置、条件は次の通りである。
装置:日本電子株式会社 JNM-ECA500、Delta V5.0
測定核:13Cゲートデカップリング
積算回数:18000
測定温度:室温
検出ピーク:69~71ppm(HPMA由来)、
25~27ppm(NSuMA由来)
測定溶剤:重水素化ジメチルスルホキシド(DMSO-d6)、750uL
サンプル量:0.1g
緩和試薬:クロム(III)アセチルアセトナート、4mg
(合成例1:高分子化合物1)
2-ヒドロキシプロピルメタクリレート(HPMA;東京化成工業株式会社製)10.5g、N-スクシンイミジルメタクリレート(NSuMA;東京化成工業株式会社製)1.5g、及び2,2’-アゾビス(イソ酪酸)ジメチル(MAIB;和光純薬工業株式会社製)0.01gをアセトニトリル28.3gに溶解させ、窒素雰囲気下、加熱還流させたアセトニトリル20.2g中へ滴下した。滴下終了後、加熱還流を保ちながら、17時間反応させた。その後、この反応混合液にジエチルエーテルを加えてポリマーを析出させた。ポリマーをろ取した後、減圧下で乾燥することで、高分子化合物1を7.71g得た。当該高分子化合物1の重量平均分子量は、ポリスチレン換算で217,000であった。13C-NMRにて測定した組成比は、HPMA/NSuMA=91モル%/9モル%であった。
2-ヒドロキシプロピルメタクリレート(HPMA;東京化成工業株式会社製)10.6g、N-スクシンイミジルメタクリレート(NSuMA;東京化成工業株式会社製)1.5g、及び2,2’-アゾビス(イソ酪酸)ジメチル(MAIB;和光純薬工業株式会社製)0.72gをアセトニトリル30.0gに溶解させ、窒素雰囲気下、加熱還流させたアセトニトリル21.4g中へ滴下した。滴下終了後、加熱還流を保ちながら、17時間反応させた。その後、この反応混合液にジエチルエーテルを加えてポリマーを析出させた。ポリマーをろ取した後、減圧下で乾燥することで、高分子化合物2を12.0g得た。当該高分子化合物2の重量平均分子量は、ポリスチレン換算で13,000であった。13C-NMRにて測定した組成比は、HPMA/NSuMA=92モル%/8モル%であった。
2-ヒドロキシプロピルメタクリレート(HPMA;東京化成工業株式会社製)33.0g、N-スクシンイミジルメタクリレート(NSuMA;東京化成工業株式会社製)18.0g、及び2,2’-アゾビス(イソ酪酸)ジメチル(MAIB;和光純薬工業株式会社製)0.05gをアセトニトリル119.2gに溶解させ、窒素雰囲気下、加熱還流させたアセトニトリル85.2g中へ滴下した。滴下終了後、加熱還流を保ちながら、17時間反応させた。その後、この反応混合液を100ml程度の量まで濃縮し、ジエチルエーテルを加えてポリマーを析出させた。ポリマーをろ取した後、減圧下で乾燥することで、高分子化合物3を36.0g得た。当該高分子化合物3の重量平均分子量は、ポリスチレン換算で182,000であった。13C-NMRにて測定した組成比は、HPMA/NSuMA=62モル%/38モル%であった。
2-ヒドロキシプロピルメタクリレート(HPMA;東京化成工業株式会社製)8.3g、N-スクシンイミジルメタクリレート(NSuMA;東京化成工業株式会社製)7.0g、及び2,2’-アゾビス(イソ酪酸)ジメチル(MAIB;和光純薬工業株式会社製)0.01gをアセトニトリル35.7gに溶解させ、窒素雰囲気下、加熱還流させたアセトニトリル25.5g中へ滴下した。滴下終了後、加熱還流を保ちながら、17時間反応させた。その後、この反応混合液にジエチルエーテルを加えてポリマーを析出させた。ポリマーをろ取した後、減圧下で乾燥することで、高分子化合物4を11.0g得た。当該高分子化合物4の重量平均分子量は、ポリスチレン換算で265,000であった。13C-NMRにて測定した組成比は、HPMA/NSuMA=50モル%/50モル%であった。
2-ヒドロキシプロピルメタクリレート(HPMA;東京化成工業株式会社製)5.5g、N-スクシンイミジルメタクリレート(NSuMA;東京化成工業株式会社製)7.0g、及び2,2’-アゾビス(イソ酪酸)ジメチル(MAIB;和光純薬工業株式会社製)0.01gをアセトニトリル29.2gに溶解させ、窒素雰囲気下、加熱還流させたアセトニトリル20.9g中へ滴下した。滴下終了後、加熱還流を保ちながら、17時間反応させた。その後、この反応混合液にジエチルエーテルを加えてポリマーを析出させた。ポリマーをろ取した後、減圧下で乾燥することで、高分子化合物5を8.9g得た。当該高分子化合物5の重量平均分子量は、ポリスチレン換算で113,000であった。13C-NMRにて測定した組成比は、HPMA/NSuMA=37モル%/63モル%であった。
メチルメタクリレート(MMA;東京化成工業株式会社製)10.0g、及び2,2’-アゾビス(イソ酪酸)ジメチル(MAIB;和光純薬工業株式会社製)0.01gをアセトニトリル23.4gに溶解させ、窒素雰囲気下、加熱還流させたアセトニトリル16.7g中へ滴下した。滴下終了後、加熱還流を保ちながら、17時間反応させた。その後、この反応混合液にジエチルエーテルを加えてポリマーを析出させた。ポリマーをろ取した後、減圧下で乾燥することで、高分子化合物6を5.3g得た。当該高分子化合物6の重量平均分子量は、ポリスチレン換算で230,000であった。
(実施例1)
高分子化合物1;0.50g、1,3,4,6-テトラキス(メトキシメチル)グリコールウリル0.03g、ピリジニウム-p-トルエンスルホナート0.005g、ジメチルアセトアミド0.49g、及びアセトン1.48gを混合した後、ミックスローターVMR-5(アズワン株式会社製)にて溶解するまで100rpmで攪拌し、実施例1の繊維製造用組成物を得た。実施例1の繊維製造用組成物における高分子化合物1の含有割合は、約20重量%である。
高分子化合物2;0.70g、1,3,4,6-テトラキス(メトキシメチル)グリコールウリル0.04g、ピリジニウム-p-トルエンスルホナート0.007g、ジメチルアセトアミド0.31g、及びアセトン0.94gを混合した後、ミックスローターVMR-5(アズワン株式会社製)にて溶解するまで100rpmで攪拌し、実施例1の繊維製造用組成物を得た。実施例2の繊維製造用組成物における高分子化合物2の含有割合は、約35重量%である。
高分子化合物3;0.23g、1,3,4,6-テトラキス(メトキシメチル)グリコールウリル0.01g、ピリジニウム-p-トルエンスルホナート0.002g、ジメチルアセトアミド0.50g、及びアセトン1.52gを混合した後、ミックスローターVMR-5(アズワン株式会社製)にて溶解するまで100rpmで攪拌し、実施例3の繊維製造用組成物を得た。実施例3の繊維製造用組成物における高分子化合物3の含有割合は、約10重量%である。
高分子化合物3;0.60g、1,3,4,6-テトラキス(メトキシメチル)グリコールウリル0.03g、ピリジニウム-p-トルエンスルホナート0.006g、ジメチルアセトアミド0.59g、及びアセトン1.77gを混合した後、ミックスローターVMR-5(アズワン株式会社製)にて溶解するまで100rpmで攪拌し、実施例4の繊維製造用組成物を得た。実施例4の繊維製造用組成物における高分子化合物3の含有割合は、約20重量%である。
高分子化合物3;0.40g、1,3,4,6-テトラキス(メトキシメチル)グリコールウリル0.06g、ピリジニウム-p-トルエンスルホナート0.004g、ジメチルアセトアミド0.38g、及びアセトン1.15gを混合した後、ミックスローターVMR-5(アズワン株式会社製)にて溶解するまで100rpmで攪拌し、実施例5の繊維製造用組成物を得た。実施例5の繊維製造用組成物における高分子化合物3の含有割合は、約20重量%である。
高分子化合物4;0.50g、1,3,4,6-テトラキス(メトキシメチル)グリコールウリル0.03g、ピリジニウム-p-トルエンスルホナート0.005g、ジメチルアセトアミド0.49g、及びアセトン1.48gを混合した後、ミックスローターVMR-5(アズワン株式会社製)にて溶解するまで100rpmで攪拌し、実施例6の繊維製造用組成物を得た。実施例6の繊維製造用組成物における高分子化合物4の含有割合は、約20重量%である。
高分子化合物5;0.50g、1,3,4,6-テトラキス(メトキシメチル)グリコールウリル0.03g、ピリジニウム-p-トルエンスルホナート0.005g、ジメチルアセトアミド0.49g、及びアセトン1.48gを混合した後、ミックスローターVMR-5(アズワン株式会社製)にて溶解するまで100rpmで攪拌し、実施例7の繊維製造用組成物を得た。実施例7の繊維製造用組成物における高分子化合物5の含有割合は、約20重量%である。
高分子化合物3;0.70g、ピリジニウム-p-トルエンスルホナート0.007g、ジメチルアセトアミド0.70g、及びアセトン2.09gを混合した後、ミックスローターVMR-5(アズワン株式会社製)にて溶解するまで100rpmで攪拌し、比較例1の繊維製造用組成物を得た。比較例1の繊維製造用組成物における高分子化合物3の含有割合は、約20重量%である。
高分子化合物3;0.70g、1,3,4,6-テトラキス(メトキシメチル)グリコールウリル0.035g、ジメチルアセトアミド0.69g、及びアセトン2.07gを混合した後、ミックスローターVMR-5(アズワン株式会社製)にて溶解するまで100rpmで攪拌し、比較例2の繊維製造用組成物を得た。比較例2の繊維製造用組成物における高分子化合物3の含有割合は、約20重量%である。
高分子化合物3;0.70g、ジメチルアセトアミド0.70g、及びアセトン2.10gを混合した後、ミックスローターVMR-5(アズワン株式会社製)にて溶解するまで100rpmで攪拌し、比較例3の繊維製造用組成物を得た。比較例3の繊維製造用組成物における高分子化合物3の含有割合は、約20重量%である。
高分子化合物6;0.26g、ピリジニウム-p-トルエンスルホナート0.003g、ジメチルアセトアミド1.70g、及びアセトン0.96gを混合した後、ミックスローターVMR-5(アズワン株式会社製)にて溶解するまで100rpmで攪拌し、比較例4の繊維製造用組成物を得た。比較例4の繊維製造用組成物における高分子化合物6の含有割合は、約8.9重量%である。
下記の試験例1~4において、電界紡糸法による繊維の製造は、エスプレイヤーES-2000(株式会社フューエンス製)を用いて実施した。繊維製造用組成物は、1mlのロック式ガラス注射筒(アズワン株式会社製)に注入し、針長13mmのロック式金属製ニードル24G(武蔵エンジニアリング株式会社製)を取り付けた。ニードル先端から繊維を受け取る基板までの距離(吐出距離)は20cmとした。印加電圧は25kVとし、吐出速度は10μl/minとした。
下記の試験例1~4において、繊維形状の確認は、イオンスパッター(E-1030、株式会社日立ハイテクノロジーズ製)にてPt-Pdを繊維に1分間蒸着した後、走査型電子顕微鏡(SEM)(S-4800、株式会社日立ハイテクノロジーズ製)を使用して、拡大倍率10,000倍で観察することにより行った。
繊維形状が維持されている場合は「良好」とし、繊維形状が維持されない場合は「不良」とした。
下記の試験例1~4において、繊維径(繊維の太さ)の測定は、走査型電子顕微鏡(SEM)(S-4800、株式会社日立ハイテクノロジーズ製)を使用して、拡大倍率10,000倍の画像を撮影及び保存した後、付属の測長ツールにより行った。
実施例1~7及び比較例1~4の繊維製造用組成物を、調製後すぐに、電界紡糸法によりアルミ箔上に紡糸した後、得られた繊維に、表3に示す条件で加熱処理を施し、加熱処理後の繊維形状を確認した。結果を表3に示す。
実施例1~7及び比較例1~4の繊維製造用組成物を、調製後すぐに、電界紡糸法によりアルミ箔上に紡糸した後、表4に示す条件で加熱処理を施した繊維をエタノールに10秒間浸漬した後、再び繊維形状を確認し、繊維径を測定した。結果を表4に示す。
実施例4及び比較例1~3の繊維製造用組成物を、調製後すぐに、電界紡糸法によりアルミ箔上に紡糸した後、表5に示す条件で加熱処理を施した繊維を液体培地であるISCOVE’S MODIFIED DULBECCO’S MEDIUM(シグマ社製)に7日間浸漬した後、水洗及びエタノール洗浄を経て、再び繊維形状を確認し、繊維径を測定した。結果を表5に示す。
表4の結果より、実施例1~7の繊維製造用組成物を用いて製造した繊維は、加熱処理後、さらにエタノールに10秒間浸漬後においても良好な形状を示した。実施例7においては、良好な繊維形状を示したが、広範囲の繊維径が観察された。さらに実施例4及び実施例5の結果より、加熱処理における加熱温度が80℃であっても、良好な繊維形状を示した。
表5の結果より、実施例4の繊維製造用組成物を用いて製造した繊維は、細胞培養用液体培地に7日間浸漬後であっても、良好な繊維形状を示した。
つまり、本発明の繊維製造用組成物を紡糸して繊維を製造する場合、良好な繊維形状を示し、且つ有機溶剤耐性及び培地耐性に優れた繊維とするためには、80℃以上で加熱処理することが望ましい。
また、上記条件にて電界紡糸を行なった場合、製造される繊維の繊維径は、成分Aの高分子化合物の重量平均分子量と、繊維製造用組成物における成分Aの高分子化合物の含有割合とに依存することが示唆された。従って、成分Aの高分子化合物の重量平均分子量、及び繊維製造用組成物における成分Aの高分子化合物の含有割合を調整することで、所望の繊維径の繊維を得ることが可能である。
実施例1及び比較例4の繊維製造用組成物を電界紡糸法により紡糸した後、得られた繊維上にて細胞培養評価を行った。なお、以下において、CO2インキュベーターにおけるCO2の濃度(%)は、雰囲気中のCO2の体積%で示した。
実施例1の繊維製造用組成物を電界紡糸法により紡糸し、ガラス基板上に20分間吹付けた後、180℃30分間加熱処理した。ガラス基板には、マイクロカバーガラス(マツナミガラス株式会社製)(Φ32mm、厚さ約0.5mm)を使用した。得られた繊維をエタノールで洗浄して風乾した後、繊維形状を走査型電子顕微鏡(SEM)で確認した。実施例1の繊維製造用組成物から得られた繊維の繊維径は約430nmであった。
尚、以下において、実施例1の繊維製造用組成物を紡糸して繊維を形成したガラス基板を、便宜上「実施例1の繊維基板」と称する。
比較例4の繊維製造用組成物を電界紡糸法により紡糸し、ガラス基板上に20分間吹付けた後、180℃10分間加熱処理した。ガラス基板には、マイクロカバーガラス(マツナミガラス株式会社製)(Φ32mm、厚さ約0.5mm)を使用した。得られた繊維をエタノールで洗浄して風乾した後、繊維形状を走査型電子顕微鏡(SEM)で確認した。比較例4の繊維製造用組成物から得られた繊維の繊維径は約440nmであった。
尚、以下において、比較例4の繊維製造用組成物を紡糸して繊維を形成したガラス基板を、便宜上「比較例4の繊維基板」と称する。
細胞は、ヒト胎児腎細胞株HEK293(DSファーマバイオメディカル株式会社製)を用いた。細胞の培養に用いた培地は、10%(v/v)FBS及び1%(v/v)NEAA(Non-Essential Amino Acids)(GIBCO社製)を含むEMEM(Eagle’s Minimum Essential Medium)培地(和光純薬工業株式会社製)を用いた。細胞は、37℃CO2インキュベーター内にて5%二酸化炭素濃度を保った状態で、直径10cmシャーレ(培地10mL)を用いて2日間以上静置培養した。引き続き、本細胞をPBS10mLで洗浄した後、トリプシン-EDTA(エチレンジアミン四酢酸)溶液(和光純薬工業株式会社製)1mLを添加して細胞を剥がし、上記の培地10mLにて懸濁した。本懸濁液を遠心分離(株式会社トミー精工製、LC-200、1000rpm/3分、室温)後、上清を除き、上記の培地を添加して細胞懸濁液を調製した。なお、PBSはリン酸緩衝生理食塩水(シグマアルドリッチジャパン社製)を意味し、FBSは牛胎児血清(Biological Industries社製)を意味する。
6穴平底マイクロプレート(アズワン株式会社製)に、実施例1の繊維基板、比較例4の繊維基板、及び対照として未処理のガラス基板を配置し、70%エタノール2mLを添加し、室温で5分間浸漬した後、風乾した。
6穴平底マイクロプレートに、実施例1の繊維基板を配置し、70%エタノール2mLを添加し、室温で5分間浸漬した。この溶液を除いて風乾した後、ラミニン521(BioLamina株式会社製)/PBS溶液(20μg/mL)を1ウェルあたり2mL添加した。37℃インキュベーターにて2時間静置しラミニンを固定化した後に溶液を除き、1ウェルあたり2mLのPBSで2回洗浄した。
6穴平底マイクロプレートに、滅菌した実施例1の繊維基板、比較例4の繊維基板、未処理のガラス基板、及びラミニン521を固定化した実施例1の繊維基板を配置し、培地2mLで2回洗浄した。その後、2.0×105cells/wellに調製したHEK293(ヒト胎児腎細胞)の細胞懸濁液を各2mL加えた後、5%二酸化炭素濃度を保った状態で、37℃で24時間CO2インキュベーター内にて静置した。
24時間の細胞培養の後、各繊維基板、及び未処理のガラス基板(対照)の上清を除き、PBS2mLで洗浄した。PBSを除いた後、10%(v/v)FBS及び1%(v/v)NEAA(GIBCO社製)を含むEMEM培地を1mL添加し、さらに100μLのWST-8試薬(キシダ化学株式会社製)を添加した。37℃で100分CO2インキュベーター内にて静置した後、反応溶液100μLを96穴平底マイクロプレートに移し、吸光度計(モレキュラーデバイス社製、SpectraMax)にて450nmの吸光度を測定した。
実施例5の繊維製造用組成物を電界紡糸法により紡糸した後、得られた繊維上にて細胞培養評価を行った。なお、細胞培養方法は、試験例2に準じて行った。
実施例5の繊維製造用組成物を電界紡糸法により紡糸し、Φ30mmポリスチレン(PS)基板上に20分間吹付けた後、80℃24時間加熱処理した。Φ30mmPS基板は、アクリサンデー株式会社製「プラバン」(商品名;厚さ0.2mm)から自作した。得られた繊維をエタノールで洗浄して風乾した後、繊維形状を走査型電子顕微鏡(SEM)で確認した。実施例5の繊維製造用組成物から得られた繊維の繊維径は約470nmであった。
尚、以下において、実施例5の繊維製造用組成物を紡糸して繊維を形成したPS基板を、便宜上「実施例5の繊維基板」と称する。
6穴平底マイクロプレートに、実施例5の繊維基板を配置し、YIGSRペプチド(株式会社ベックス社製)/PBS溶液(0.05重量%)を1ウェルあたり2mL添加した。室温24時間静置してペプチドを固定化した後に溶液を除き、1ウェルあたり2mLのPBSで2回洗浄した。
6穴平底マイクロプレート(アズワン株式会社製)に、実施例5の繊維基板、ペプチドを固定化した実施例5の繊維基板、及び対照として未処理のPS基板を配置し、70%エタノール2mLを添加し、室温で5分間浸漬した後、風乾した。
6穴平底マイクロプレートに、滅菌した実施例5の繊維基板、ペプチドを固定化した実施例5の繊維基板、及び対照として未処理のPS基板を配置し、培地2mLで2回洗浄した。その後、2.0×105cells/wellに調製したHEK293(ヒト胎児腎細胞)の細胞懸濁液を各2mL加えた後、5%二酸化炭素濃度を保った状態で、37℃で24時間CO2インキュベーター内にて静置した。
24時間の細胞培養の後、細胞培養を行った実施例5の繊維基板、ペプチドを固定化した実施例5の繊維基板、及び未処理のPS基板(対照)の上清を除き、PBS2mLで洗浄した。PBSを除いた後、10%(v/v)FBS及び1%(v/v)NEAA(GIBCO社製)を含むEMEM培地を1mL添加し、さらに100μLのWST-8試薬(キシダ化学株式会社製)を添加した。37℃で100分CO2インキュベーター内にて静置した後、反応溶液100μLを96穴平底マイクロプレートに移し、吸光度計(モレキュラーデバイス社製、SpectraMax)にて450nmの吸光度を測定した。
実施例4及び比較例4の繊維製造用組成物を電界紡糸法により紡糸した後、得られた繊維上にて細胞培養評価を行った。なお、以下において、CO2インキュベーターにおけるCO2の濃度(%)は、雰囲気中のCO2の体積%で示した。
実施例4の繊維製造用組成物を電界紡糸法により紡糸し、ガラス基板上に20分間吹付けた後、180℃30分間加熱処理した。ガラス基板には、マイクロカバーガラス(マツナミガラス株式会社製)(Φ32mm、厚さ約0.5mm)を使用した。得られた繊維をエタノールで洗浄して風乾した後、繊維形状を走査型電子顕微鏡(SEM)で確認した。実施例4の繊維製造用組成物から得られた繊維の繊維径は約450nmであった。
尚、以下において、実施例4の繊維製造用組成物を紡糸して繊維を形成したガラス基板を、便宜上「実施例4の繊維基板」と称する。
比較例4の繊維製造用組成物を電界紡糸法により紡糸し、ガラス基板上に20分間吹付けた後、180℃10分間加熱処理した。ガラス基板には、マイクロカバーガラス(マツナミガラス株式会社製)(Φ32mm、厚さ約0.5mm)を使用した。得られた繊維をエタノールで洗浄して風乾した後、繊維形状を走査型電子顕微鏡(SEM)で確認した。比較例4の繊維製造用組成物から得られた繊維の繊維径は約440nmであった。
尚、以下において、比較例4の繊維製造用組成物を紡糸して繊維を形成したガラス基板を、便宜上「比較例4の繊維基板」と称する。
マウス繊維芽細胞(MEF;日本SLC社製E12.5 ICRマウスから採取・調整)またはマトリゲル ヒトESC-qualified matrix(Corning製)上で培養したヒトES細胞(H9株)またはヒトiPS細胞(253G1株)をD-PBS(-)(Life technologies製)にて2回洗浄した後、TrypLE Express 1mLを加えて37℃で5分間静置した。TrypLE Expressを吸引除去した後、最終濃度10μMのY-27632(和光純薬株式会社製)を含むmTeSR1(株式会社ベリタス製)(以下、mTeSR1/10μM Y27632)培地で細胞を回収した。細胞懸濁液をピペッティングにてシングルセルにした後、回転数1000rpm/3分間、室温で遠心分離を行った。上清を除去した後、細胞ペレットをmTeSR1/10μM Y27632培地に再度懸濁し、NucleoCounter NC-200(以下、NC-200;ChemoMetecAS製)にて細胞数を計測した。
6穴平底マイクロプレート(BD Bioscience社製)に、実施例4の繊維基板、及び比較例4の繊維基板を配置し、100%エタノール1mLにて3回洗浄した後、風乾した。その後、Dulbecco’s Modified Eagle Medium:Nutrient Mixture F-12(DMEM/F-12;Sigma Aldrich製)溶液1mLにて3回洗浄した。
6穴平底マイクロプレート(BD Bioscience社製)に、実施例4の繊維基板、及び未処理のガラス基板を配置し、100%エタノール1mLにて3回洗浄し、風乾後、D-PBS(-)またはDMEM/F-12溶液1mLにて3回洗浄した。実施例4の繊維基板には、D-PBS(-)によって最終濃度100μg/10mLに調製したラミニン511(BioLamina製)溶液を1mL添加し、37℃2時間または4℃一晩静置後、DMEM/F-12溶液1mLにて1回洗浄した。ガラス基板には、DMEM/F-12にて75倍で希釈したマトリゲル溶液を1mL添加し、37℃2時間または4℃一晩静置後、DMEM/F-12溶液1mLにて1回洗浄した。
6穴平底マイクロプレート(BD Bioscience社製)に、滅菌した実施例4の繊維基板、滅菌した比較例4の繊維基板、ラミニン511を固定化した実施例4の繊維基板、及びマトリゲル(コーニング社製)をコートしたガラス基板を配置した後、ヒトES細胞またはヒトiPS細胞の懸濁液を1.5~2.0×105cells/wellとなるように添加した。37℃24時間後(培養1日目)、mTeSR1/10μM Y27632培地1.5mLにて培地交換を行った。培養2日目から培養4日目は、mTeSR1培地1.5mLにて培地交換を行った。培養期間中は、5%二酸化炭素濃度を保った状態で、37℃でCO2インキュベーター内にて静置した。
培養4日後、培地を除去し、D-PBS(-)で細胞層を洗浄した。その後、TrypLE Express 0.5mLを添加し、37℃1分間または3分間静置した。細胞を回収した後、回転数1000rpm/3分間遠心分離し、上清を除去した。細胞ペレットをDMEM/F-12溶液にて再度懸濁した後、NC-200にて細胞数と生存率を計測した。細胞増殖効率は、培養4日目の細胞数/播種した細胞数より算出した。
さらに、表9のヒトiPS細胞生存率の結果から、ラミニン511を固定化した実施例4の繊維基板、及び実施例4の繊維基板の細胞生存率は、マトリゲルをコートしたガラス基板より約20%高かった。この結果より、細胞培養には本発明の繊維が有効であることがわかった。
Claims (10)
- 上記高分子化合物の重量平均分子量が、1,000~1,000,000である、請求項1又は2に記載の組成物。
- 上記溶剤が、極性溶剤である、請求項1~3のいずれか1項に記載の組成物。
- 請求項1~4のいずれか1項に記載の組成物を紡糸する工程を含む、繊維の製造方法。
- 上記紡糸が、電界紡糸である、請求項5記載の方法。
- 紡糸した繊維を、70~300℃の範囲で加熱する工程を含む、請求項5又は6記載の方法。
- さらに細胞接着物質を固定化する工程を含む、請求項5~7のいずれか1項に記載の方法。
- 請求項5~8のいずれか1項に記載の方法で製造される繊維。
- 請求項9記載の繊維を含む、細胞培養足場材料。
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| CN201580008422.6A CN106103821B (zh) | 2014-02-14 | 2015-02-13 | 含有活性酯基的纤维制造用组合物及使用该纤维的细胞培养支架材料 |
| SG11201606729XA SG11201606729XA (en) | 2014-02-14 | 2015-02-13 | Active-ester-group-containing composition for producing fibers, and cell culture scaffold material using fibers produced from active-ester-group-containing composition |
| JP2015562868A JP6504508B2 (ja) | 2014-02-14 | 2015-02-13 | 活性エステル基を含む繊維製造用組成物及びその繊維を用いた細胞培養足場材料 |
| EP15749372.7A EP3106548B1 (en) | 2014-02-14 | 2015-02-13 | Active-ester-group-containing composition for producing fibers, and cell culture scaffold material using fibers produced from active-ester-group-containing composition |
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| JP2014-027044 | 2014-02-14 | ||
| JP2014027044 | 2014-02-14 |
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| EP (1) | EP3106548B1 (ja) |
| JP (1) | JP6504508B2 (ja) |
| CN (1) | CN106103821B (ja) |
| SG (1) | SG11201606729XA (ja) |
| TW (1) | TW201546146A (ja) |
| WO (1) | WO2015122478A1 (ja) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016068270A1 (ja) * | 2014-10-31 | 2016-05-06 | 日産化学工業株式会社 | リガンド結合繊維及び当該繊維を用いた細胞培養基材 |
| WO2020153774A1 (ko) | 2019-01-23 | 2020-07-30 | 앱티스 주식회사 | 항체-페이로드 컨쥬게이트 제조용 화합물, 이의 용도 |
| WO2020218579A1 (ja) * | 2019-04-26 | 2020-10-29 | 国立大学法人京都大学 | 分化誘導のために馴化された多能性幹細胞の作製方法 |
| JP2021170945A (ja) * | 2020-04-20 | 2021-11-01 | 三洋化成工業株式会社 | 細胞培養基材用コーティング剤、細胞培養基材、細胞培養用キット及び細胞シートの生産方法 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112023001848T5 (de) | 2022-04-08 | 2025-02-13 | Eaton Cummins Automated Transmission Technologies Llc | Vereinfachung der gangschaltbetätigung |
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- 2015-02-13 EP EP15749372.7A patent/EP3106548B1/en not_active Not-in-force
- 2015-02-13 CN CN201580008422.6A patent/CN106103821B/zh not_active Expired - Fee Related
- 2015-02-13 WO PCT/JP2015/053890 patent/WO2015122478A1/ja not_active Ceased
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| WO2016068270A1 (ja) * | 2014-10-31 | 2016-05-06 | 日産化学工業株式会社 | リガンド結合繊維及び当該繊維を用いた細胞培養基材 |
| JPWO2016068270A1 (ja) * | 2014-10-31 | 2017-08-10 | 日産化学工業株式会社 | リガンド結合繊維及び当該繊維を用いた細胞培養基材 |
| US10724028B2 (en) | 2014-10-31 | 2020-07-28 | Nissan Chemical Industries, Ltd. | Ligand-binding fiber and cell culture substrate using said fiber |
| WO2020153774A1 (ko) | 2019-01-23 | 2020-07-30 | 앱티스 주식회사 | 항체-페이로드 컨쥬게이트 제조용 화합물, 이의 용도 |
| WO2020218579A1 (ja) * | 2019-04-26 | 2020-10-29 | 国立大学法人京都大学 | 分化誘導のために馴化された多能性幹細胞の作製方法 |
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| JP2021170945A (ja) * | 2020-04-20 | 2021-11-01 | 三洋化成工業株式会社 | 細胞培養基材用コーティング剤、細胞培養基材、細胞培養用キット及び細胞シートの生産方法 |
| JP7502888B2 (ja) | 2020-04-20 | 2024-06-19 | 三洋化成工業株式会社 | 細胞培養基材用コーティング剤、細胞培養基材、細胞培養用キット及び細胞シートの生産方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| US10240122B2 (en) | 2019-03-26 |
| CN106103821B (zh) | 2018-03-02 |
| TW201546146A (zh) | 2015-12-16 |
| CN106103821A (zh) | 2016-11-09 |
| EP3106548A1 (en) | 2016-12-21 |
| EP3106548B1 (en) | 2019-01-02 |
| US20170044491A1 (en) | 2017-02-16 |
| JPWO2015122478A1 (ja) | 2017-03-30 |
| JP6504508B2 (ja) | 2019-04-24 |
| EP3106548A4 (en) | 2017-10-25 |
| SG11201606729XA (en) | 2016-09-29 |
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