WO2018116902A1 - 細胞培養基材 - Google Patents
細胞培養基材 Download PDFInfo
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- WO2018116902A1 WO2018116902A1 PCT/JP2017/044506 JP2017044506W WO2018116902A1 WO 2018116902 A1 WO2018116902 A1 WO 2018116902A1 JP 2017044506 W JP2017044506 W JP 2017044506W WO 2018116902 A1 WO2018116902 A1 WO 2018116902A1
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- 0 C[N+](*(*)*=C=C)[O-] Chemical compound C[N+](*(*)*=C=C)[O-] 0.000 description 1
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F293/00—Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F293/00—Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule
- C08F293/005—Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule using free radical "living" or "controlled" polymerisation, e.g. using a complexing agent
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/20—Material Coatings
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M25/00—Means for supporting, enclosing or fixing the microorganisms, e.g. immunocoatings
- C12M25/14—Scaffolds; Matrices
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2438/00—Living radical polymerisation
- C08F2438/03—Use of a di- or tri-thiocarbonylthio compound, e.g. di- or tri-thioester, di- or tri-thiocarbamate, or a xanthate as chain transfer agent, e.g . Reversible Addition Fragmentation chain Transfer [RAFT] or Macromolecular Design via Interchange of Xanthates [MADIX]
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- C12N2533/00—Supports or coatings for cell culture, characterised by material
- C12N2533/30—Synthetic polymers
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- 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
Definitions
- the present invention relates to a cell culture substrate.
- Patent Document 2 a large-scale apparatus such as electron beam irradiation is required by using a base material in which a block copolymer having a structure in which a water-insoluble polymer segment and a temperature-responsive polymer segment are bonded is coated on the surface of the base material. It has been proposed that it is possible to immobilize the warm responsive polymer on the surface of the base material.
- the block copolymer disclosed in Patent Document 2 has insufficient water resistance, and has a problem that elution from the substrate surface occurs and a problem that cell detachability is insufficient.
- An object of the present invention is to provide a cell culture substrate capable of culturing animal cells with high efficiency and capable of separating and recovering the cultured cells while they are alive.
- the cell culture substrate contains a block polymer of a segment having a lower critical solution temperature and a hydrophobic segment, and the polymerization degree of the segment having the lower critical solution temperature is 400- It has been found that the above-mentioned problems can be solved by providing a cell culture substrate characterized by being 10,000.
- a cell culture substrate in which the hydrophobic segment is obtained by polymerizing a monomer represented by the following formula (1).
- R 1 is a hydrogen atom or a methyl group
- R 2 is a phenyl group, a carboxyalkyl group having 1 to 8 alkyl carbon atoms, a carboxyaralkyl group having 7 to 8 aralkyl carbon atoms, It represents any one of the group represented by 2) and the group represented by the following formula (3).
- n 2 or 3
- R 3 represents an alkyl group having 1 to 3 carbon atoms.
- R 4 and R 5 each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and the total carbon number of R 4 and R 5 is 5 or more. .)
- the cell culture substrate of the present invention can cultivate animal cells with high efficiency and can be detached and recovered from the substrate while the cultured cells remain alive.
- the present invention relates to a cell culture substrate containing a block polymer of a segment having a lower critical solution temperature and a hydrophobic segment, wherein the segment having the lower critical solution temperature has a degree of polymerization of 400 to 10,000. It provides a cell culture substrate characterized.
- the segment having the lower critical solution temperature in the present invention is a segment in the block polymer, and the segment is a segment composed of a polymer that dissolves at a certain temperature or lower.
- the segment having the lower critical solution temperature in the present invention is a polymer that dissolves in water when the temperature falls below a certain temperature as described below.
- Examples of the polymer having the lower critical solution temperature include the following 1) and 2). 1) A polymer obtained by polymerizing a monomer in which a homopolymer has a lower critical solution temperature. 2) Copolymer of hydrophobic monomer and hydrophilic monomer
- Monomers having a lower critical solution temperature for homopolymers include, for example, N-isopropyl (meth) acrylamide, Nn-propyl (meth) acrylamide, N-cyclopropyl (meth) acrylamide, N-ethoxyethyl (meth) acrylamide, N -Tetrahydrofurfuryl (meth) acrylamide, N-ethylacrylamide, N-ethyl-N-methylacrylamide, N, N-diethylacrylamide, N-methyl-Nn-propylacrylamide, N-methyl-N-isopropylacrylamide, Examples are N-acryloylpiperidine and N-acryloylpyrrolidine. These monomers may be used alone or in combination of two or more.
- the segment obtained by polymerizing the monomer having the lower critical solution temperature of the homopolymer (1) can easily produce a polymer having the lower critical solution temperature.
- these monomers have low adhesion to the plastic surface, and there is a problem that the applied polymer layer is easy to peel off when exposed to water.
- the cell culture substrate of the present application has a hydrophobic segment. Therefore, the culture substrate can be used without peeling off.
- R 1 represents a hydrogen atom or a methyl group
- R 2 represents an alkylene group having 2 to 3 carbon atoms
- R 3 represents an alkyl group having 1 to 2 carbon atoms.
- R 4 represents a hydrogen atom or a methyl group
- R 5 represents an alkylene group having 2 to 3 carbon atoms.
- n an integer of 2 to 20.
- hydrophilic amide monomer (b) examples include dimethylacrylamide, acrylamide, methylacrylamide, and ethylacrylamide.
- the hydrophobized monomer is a monomer that is water-soluble at the time of monomer but becomes insoluble in an aqueous solvent upon polymerization. When such a monomer is contained in the copolymer, it can be used as a cell culture substrate that is excellent in water resistance and hardly peeled off from the support.
- the hydrophobic monomer the compound represented by the above formula (1), as the hydrophobic monomer, the compound represented by the above formula (1), diacetone acrylic amide, (meth) acrylic acid polypropylene glycol, Examples thereof include methoxydiethylene glycol acrylate and methoxytriethylene glycol acrylate. These may be used alone or in combination.
- 2 methoxyethyl acrylate, 2 ethoxyethyl acrylate, and 3 methoxypropyl acrylate are preferable, and 2 methoxyethyl acrylate and 2 ethoxyethyl acrylate are particularly preferable.
- the lower critical solution temperature of the obtained copolymer segment can be widely controlled by the type and ratio of the monomer. It is preferable because the cells can be cultured with different cell types and ratios and better cell adhesion and proliferation. For example, as the ratio of the monomer (b, c, or d) is increased with respect to the monomer (a), the lower critical solution temperature of the resulting copolymer shifts to the higher temperature side. This ratio and the lower critical solution temperature are in a substantially linear relationship. Since the cell culture temperature is usually 37 ° C., it is preferable to prepare so that the lower critical solution temperature of the obtained copolymer is about 20 to 32 ° C.
- the degree of polymerization of the segment having the lower critical solution temperature is 400-10000. When it is less than 400, the cell detachability is poor, and when it is more than 10,000, the cell culture substrate is inferior in water resistance, so that the substrate is easily detached from the support.
- the preferred polymerization is 1000 to 8000. Within this range, the balance between cell detachability and culture efficiency is excellent. Particularly preferred is 3000-6000.
- the block polymer of the present invention is characterized by having a hydrophobic segment.
- “hydrophobic” in the segment of the block polymer means that the polymer composed of the segment has a solubility in water at 25 ° C. of less than 0.5 g / 100 mL.
- the hydrophobic segment includes at least a monomer unit of a hydrophobic monomer. Since the block polymer of the present invention has a hydrophobic segment, even if it has a segment having a lower critical solution temperature that is inferior in water resistance, the block polymer has excellent water resistance and excellent adhesion to a support.
- the hydrophobic monomer is not particularly limited as long as it is a monomer that becomes hydrophobized after polymerization, and preferably includes monomers represented by the following formulas (1) to (3). In addition, these hydrophobic monomers may be used independently or may be used in combination of 2 or more type.
- R 1 is a hydrogen atom or a methyl group
- R 2 is a phenyl group, a carboxyalkyl group having 1 to 8 alkyl carbon atoms, a carboxyaralkyl group having 7 to 8 aralkyl carbon atoms, It represents any one of the group represented by 2) and the group represented by the following formula (3).
- n 2 or 3
- R 3 represents an alkyl group having 1 to 3 carbon atoms.
- R 4 and R 5 each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and the total carbon number of R 4 and R 5 is 5 or more. .)
- the monomer represented by the above formula (1) is preferable because the obtained polymer segment is hydrophobic and is excellent in water resistance and support adhesion of the cell culture substrate.
- ethyl acrylate, butyl acrylate, and styrene are preferable, and butyl acrylate is particularly preferable.
- the block polymer of the present invention is a polymer having a segment having the lower critical solution temperature and a hydrophobic segment.
- the block polymer of the present invention may be an AB diblock type, or an ABA or BAB triblock type polymer having a larger number of segments. It doesn't matter.
- the diblock type or triblock type is preferable, and the diblock type is particularly preferable.
- the production method of the block polymer is not particularly limited, and a known method can be adopted. Of these, precision radical polymerization is preferable, and reversible addition-fragmentation chain transfer (RAFT) polymerization, atom transfer radical polymerization (ATRP), and nitroxide-mediated polymerization (NMP) are more preferable, and RAFT polymerization is preferable. Is more preferable.
- precision radical polymerization is preferable, and reversible addition-fragmentation chain transfer (RAFT) polymerization, atom transfer radical polymerization (ATRP), and nitroxide-mediated polymerization (NMP) are more preferable, and RAFT polymerization is preferable. Is more preferable.
- the cell culture substrate of the present invention may have a compound in addition to the block polymer.
- a compound in addition to the block polymer For example, preservatives and antibacterial agents, coloring agents, fragrances, enzymes, sugars, proteins, peptides, amino acids, cells, DNAs, salts, water-soluble organic solvents, surfactants, polymer compounds, leveling agents, etc. But it doesn't matter.
- the shape of the cell culture substrate of the present invention is not particularly limited as long as cell culture can be performed and cultured cells can be easily detached by low-temperature treatment.
- the thickness of the cell culture substrate of the present invention is preferably 1000 nm or less, more preferably 500 nm or less in a state where the film is sufficiently dried at a temperature equal to or higher than the lower critical temperature.
- the cell culture substrate of the present invention may be used alone, but is preferably used as a cell culture device having a substrate formed on a support. This is because cell culture equipment is excellent in convenience of transportation and storage, and can be used as it is as a culture container or culture carrier.
- the material of the support on which the cell culture substrate of the present invention is laminated is such that the culture substrate can be sufficiently adhered, cell culture can be performed on the adhered culture substrate, and cultured cells can be easily detached by low-temperature treatment If it is, it will not be specifically limited.
- styrene resin such as polystyrene, polyolefin resin such as polypropylene, polyurethane resin, polycarbonate, polyethylene terephthalate (PET), polysulfone resin, fluorine resin, polysaccharide natural polymer such as cellulose, glass, Inorganic materials such as ceramics and metal materials such as stainless steel and titanium are preferably used.
- the shape of the support is not particularly limited as long as it can be a support for the cell culture substrate of the present invention.
- the shape may be a combination of these, or may be a support having an indefinite shape that does not have a specific shape.
- the cell culture substrate of the present invention may be used as a cell culture device by being integrated with the support, or may be used alone after being peeled off from the support.
- a preferable method for forming the cell culture substrate of the present invention includes a method of applying the coating agent containing the block polymer of the present invention on the above-mentioned support.
- the coating agent includes a block polymer and a solvent.
- additives and the like may be included as necessary.
- the block polymer Since the above-mentioned block polymer is used, the description thereof is omitted here.
- the block polymer may contain only 1 type and may contain 2 or more types of block polymers which have a different structure.
- the content of the block polymer is preferably 0.01 to 90% by mass and more preferably 0.1 to 50% by mass with respect to the total mass of the coating agent. It is preferable that the content of the block polymer is 0.01% by mass or more because the obtained coating film easily exhibits surface hydrophilicity. On the other hand, when the content of the block polymer is 90% by mass or less, the viscosity is low, which is preferable because the coating suitability is enhanced.
- the solvent that can be contained in the coating agent is not particularly limited, and known solvents can be used.
- the solvent include water or an organic solvent.
- the organic solvent include alcohol solvents such as methanol, ethanol, isopropyl alcohol, butanol, sec-butanol, iso-butanol and tert-butanol; ether solvents such as tetrahydrofuran and 1,4-dioxane; cyclohexanone and methyl isobutyl ketone.
- Ketone solvents such as acetonitrile; nitrile solvents such as acetonitrile; amide solvents such as dimethylformamide and dimethylacetamide; dimethyl sulfoxide; dioxirane; pyrrolidone and the like.
- an alcohol solvent is preferably used, and methanol, ethanol, propanol, isopropyl alcohol, and tert-butanol are more preferably used.
- the solvent is preferably water or an alcohol solvent, and more preferably methanol, ethanol, propanol, isopropyl alcohol, or tert-butanol.
- the above-mentioned solvents may be used alone or in combination of two or more.
- the content of the solvent in the coating agent is preferably 10 to 99.99% by mass, more preferably 50 to 99.9% by mass, and more preferably 80 to 99.9% by mass with respect to the total mass of the coating agent. More preferably, it is 5 mass%.
- the solvent content is 10% by mass or more, the viscosity of the coating agent solution is lowered, and therefore, it is preferable from the viewpoint of excellent coating suitability.
- the content of the solvent is 99.99% by mass or less, the thickness of the coated film after coating is preferably not too thin.
- the coating agent may contain an additive depending on the purpose of use.
- the additive is not particularly limited, and known ones can be used. Specifically, excipients, Surfactants, plasticizers, antifoaming agents, pigments, antioxidants, antibiotics, ultraviolet absorbers, crystal nucleating agents, crystallization accelerators, stabilizers, antibacterial agents and the like can be mentioned. These additives may be used alone or in combination of two or more.
- the method for applying the coating agent is not particularly limited, and examples thereof include spray coating, flow coating, and dipping. Moreover, when a base material is tube shape, the method etc. which let a coating agent flow are mentioned. At this time, after the liquid is passed, the solvent is usually passed to remove excess coating agent inside the tube.
- the drying conditions are not particularly limited, and may be natural drying or heat drying.
- the drying temperature in the case of heat drying varies depending on the coating agent used, but is preferably 30 to 70 ° C, more preferably 40 to 60 ° C. In addition, by controlling the drying, a coating film in which a part of the solvent remains can be obtained.
- the cell culture substrate of the present invention can suitably culture animal cells.
- Animal cells may be derived from animals, and examples thereof include humans, mice, monkeys, and the like.
- epithelial cells such as corneal epithelial cells
- endothelial cells such as human umbilical vein endothelial cells
- fibroblasts such as human skin fibroblasts, mouse fibroblasts
- blood cells Contractile cells (skeletal muscle cells, cardiomyocytes, etc.), blood and immune cells (erythrocytes, macrophages, etc.), neurons (neurons, glial cells, etc.), pigment cells (retinal pigment cells, etc.), hepatocytes, chondrocytes, bones
- blast cells and stem cells ES cells, iPS cells, hematopoietic stem cells, skin stem cells, germ stem cells, EC cells, EG cells, neural stem cells).
- the culture can be carried out by allowing a medium and cells to coexist on the present cell culture substrate and maintaining a temperature suitable for the culture.
- a medium suitable for the cell type may be selected as the medium.
- the medium may be selected as appropriate depending on the culture period.
- the medium may be in a stationary state or a perfusion state, and a method suitable for cultured cells may be selected.
- NIPAM N-isopropylacrylamide
- t-butanol t-butanol
- 5.54 g of water was sufficiently bubbled with nitrogen, and then added to the above reaction solution.
- the mixture was stirred at 70 ° C. for 20 hours.
- 66.7 g of methanol was added to the reaction solution to obtain an AB type temperature-responsive block polymer solution.
- Table 1 shows the results of measuring the water gel fraction of this block polymer by the test method described later.
- Example 1 The block polymer 1 obtained in Synthesis Example 1 was diluted with methanol to prepare a 0.5% solution, and 60 ul was added to a 35 mm polystyrene petri dish (TCPS, manufactured by IWAKI). Thereafter, the cell culture substrate 1 was obtained by drying at 80 ° C. for 30 minutes and further washing by repeatedly immersing in pure water for 10 minutes three times and drying at 40 ° C. overnight. Table 1 shows the results of evaluating the cell culture properties and peelability of the cell culture substrate using the test methods described later.
- TCPS polystyrene petri dish
- Evaluation of cell culture Medium is 500 mL of Eagle's minimal essential medium (E-MEM, manufactured by GIBCO), 50 mL of fetal calf serum MEM Non-Essential Amino Acids Solution, 100X (manufactured by GIBCO), 1 mL, L-Glutamine G, B Made) was added. With 2 mL of the medium, mouse Balb3T3 cells (JCRB cell bank) were seeded so that the cell density was 1.0 ⁇ 10 4 cells / cm 2, and the culturing property after 3 days from the seeding was observed and evaluated under a microscope. ⁇ : The culture results and culture properties of only the TCPS without a substrate are equivalent. (Triangle
- Balb3T3 cells were cultured on the cell culture substrate 1, and a cell detachment test was performed 3 days after seeding. After removing the culture medium during culture, 1 mL of a 4 ° C. cold medium was added and left at room temperature of 25 ° C. for 20 minutes. After the detached cells and the medium were removed, the culture substrate was washed with phosphate buffered saline (PBS (-)). 1 mL of HistoChoice MB Tissue Fixative (manufactured by Amresco) was added to the cell culture substrate after washing, and the remaining cells were fixed at room temperature for 30 minutes and then removed.
- PBS phosphate buffered saline
- Comparative block polymer 1 was applied to TCPS according to the same method as in Example 1 to prepare comparative cell culture substrate 1.
- the cell culture property / peelability was evaluated in the same manner as in Example 1, it was as shown in Table 1.
- the cell culture substrate of the present invention is to provide a cell culture substrate capable of culturing animal cells with high efficiency and capable of peeling and collecting the cultured cells while they are alive.
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Abstract
Description
このような背景のもと、温度応答性のポリマーを基材表面に固定化した細胞培養基材が提案されている。このような基材では、細胞培養温度ではタンパク接着性であるが、低温に下げることで細胞培養基材の表面状態が変わってタンパク接着性が低下するため、酵素処理なしで細胞を剥離することが可能となる。(例えば、特許文献1)
しかし、特許文献2で開示されているブロックコポリマーは耐水性が不足しており、基材表面からの溶出が起こるという課題と、細胞剥離性が不十分であるという課題が存在した。
本発明における下限臨界溶解温度を有するセグメントとは、ブロックポリマーにおけるセグメントであって、該セグメントは、ある一定温度以下になると溶解する重合体で構成されたセグメントのことをいう。
1)ホモポリマが下限臨界溶解温度を有するモノマーを重合させて得られる重合体
2)疎水化モノマーと親水性モノマーとの共重合体
2-1)親水性モノマーが、ホモポリマーが下限臨界溶解温度を有するモノマーである場合と、
2-2)下記式(1)で表されるモノマー(a)と親水性のアミド系ビニルモノマー(b)との共重合体(B1)、前記またはモノマー(a)と下記式(2)表されるモノマー(c)との共重合体(B2)、またはモノマー(a)と下記式(3)表されるポリエチレングリコール鎖含有モノマー(d)との共重合体(B3)、が挙げられる。
疎水化モノマーとしては、前記式(1)で表される化合物や、 疎水化モノマーとしては、前記式(1)で表される化合物や、ジアセトンアクリルアアミド、(メタ)アクリル酸ポリプロピレングリコール、メトキシジエチレングリコールアクリレート、メトキシトリエチレングリコールアクリレートが挙げられる。これらは単独でも複数種を同時に使用してもかまわない。中でも、アクリル酸2メトキシエチル、アクリル酸2エトキシエチル、アクリル酸3メトキシプロピルが好ましく、アクリル酸2メトキシエチル、アクリル酸2エトキシエチルが特に好ましい。
好ましい重合としては1000-8000であり、この範囲であれば細胞剥離性と培養効率のバランスに優れる。特に好ましくは3000―6000である。
本発明のブロックポリマーは、疎水性セグメントを有することを特徴とする。なお、本明細書において、ブロックポリマーのセグメントにおける「疎水性」とは、セグメントからなる重合体について、水中における25℃での溶解度が0.5g/100mL未満であることを意味する。疎水性セグメントは、少なくとも疎水性モノマーのモノマー単位を含む。
本発明のブロックポリマーは、疎水性セグメントを有することから、耐水性に劣る下限臨界溶解温度を有するセグメントを有していても、耐水性に優れ支持体との密着性に優れる。
その中でも好ましくは、エチルアクリレート、ブチルアクリレート、スチレンであり、特に好ましくはブチルアクリレートである。
本発明のブロックポリマーは、前記下限臨界溶解温度を有するセグメントと、疎水性セグメントとを有するポリマーである。下限臨界溶解温度を有するセグメントをA、疎水性セグメントをBとした時に、本発明のブロックポリマーはABのジブロックタイプでもよく、ABAまたはBABのトリブロックタイプでも、それ以上のセグメント数を有するポリマーであってもかまわない。好ましくは、ジブロックタイプまたはトリブロックタイプであり、特に好ましくはジブロックタイプである。
ブロックポリマーの製造方法は、特に制限されず、公知の方法を採用することができる。このうち、精密ラジカル重合であることが好ましく、可逆的付加-開裂連鎖移動(RAFT)重合、原子移動ラジカル重合(ATRP)、ニトロキシド媒介重合(NMP)であることがより好ましく、RAFT重合であることがさらに好ましい。
本発明の細胞培養基材は、ブロックポリマーのほかに、配合物を有していても良い。例えば防腐剤や抗菌剤、着色料、香料、酵素、糖類、たんぱく質、ペプチド類、アミノ酸類、細胞、DNA類、塩類、水溶性有機溶剤類、界面活性剤、高分子化合物、レベリング剤などを含んでもかまわない。
本発明の細胞培養基材の形状は、細胞培養でき、低温処理により培養細胞を容易に剥離できるものであれば、特に限定されない。例えば、フィルム状のもの、皿状のもの、ボトル(ビン)状のもの、チューブ状のもの、太さ5nm~5mmの糸状または棒状のもの、バッグ(袋)状のもの、マルチウエルプレート状のもの、マイクロ流路状のもの、多孔質膜状または網状のもの(例えばトランスウエル、セルストレイナー)、粒径が好ましくは10~2000μm、より好ましくは100~500μmの球状のものなどが挙げられる。
また、本発明の細胞培養基材の膜厚としては、下限臨界温度以上の温度で十分に乾燥させた状態で、1000nm以下が好ましく、500nm以下がさらに好ましい。
前記コーティング剤は、ブロックポリマーと、溶媒と、を含む。その他、必要に応じて、添加剤等を含んでいてもよい。
ブロックポリマーとしては、上述したものが用いられることからここでは説明を省略する。
なお、ブロックポリマーは1種のみを含んでいてもよいし、異なる構成を有する2種以上のブロックポリマーを含んでいてもよい。
ブロックポリマーの含有量は、コーティング剤の全質量に対して、0.01~90質量%であることが好ましく0.1~50質量%であることがより好ましい。ブロックポリマーの含有量が0.01質量%以上であると、得られる塗膜が表面親水性を発現しやすいことから好ましい。一方、ブロックポリマーの含有量が90質量%以下であると、粘度が低いことから塗工適性が高まることから好ましい。
コーティング剤に含有されうる溶媒としては、特に制限されず公知のものが使用されうる。
溶媒の具体例としては、水または有機溶媒が挙げられる。
前記有機溶媒としては、メタノール、エタノール、イソプロピルアルコール、ブタノール、sec-ブタノール、iso-ブタノール、tert-ブタノール等のアルコール系溶媒;テトラヒドロフラン、1,4-ジオキサン等のエーテル系溶媒;シクロヘキサノン、メチルイソブチルケトン等のケトン系溶媒;アセトニトリル等のニトリル系溶媒;ジメチルホルムアミド、ジメチルアセトアミド等のアミド系溶媒;ジメチルスルホキシド;ジオキシラン;ピロリドン等が挙げられる。これらのうち、有機溶媒としてはアルコール系溶媒を用いることが好ましく、メタノール、エタノール、プロパノール、イソプロピルアルコール、tert-ブタノールを用いることがより好ましい。
上述のうち、溶媒は、水、アルコール系溶媒であることが好ましく、メタノール、エタノール、プロパノール、イソプロピルアルコール、tert-ブタノールであることがより好ましい。
上述の溶媒は、単独で用いても、2種以上を組み合わせて用いてもよい。
コーティング剤中の溶媒の含有量は、コーティング剤の全質量に対して、10~99.99質量%であることが好ましく、50~99.9質量%であることがより好ましく、80~99.5質量%であることがさらに好ましい。溶媒の含有量が10質量%以上であると、コーティング剤溶液の粘度が低くなるため、塗工適正に優れることから好ましい。一方、溶媒の含有量が99.99質量%以下であると、コーティング後の塗膜の厚さが薄くなりすぎず好ましい。
コーティング剤は、使用目的に応じて添加剤を含有してもよい。
当該添加剤としては、特に制限されず、公知のものが使用されうる。具体的には、賦形剤、
界面活性剤、可塑剤、消泡剤、顔料、抗酸化剤、抗生物質、紫外線吸収剤、結晶核剤、結晶化促進剤、安定化剤、抗菌剤等が挙げられる。これらの添加剤は、単独で用いても、2種以上を混合して用いてもよい。
また、基材がチューブ状である場合には、コーティング剤を通液させる方法等が挙げられる。この際、通液後は、通常、溶媒を通液させてチューブ内部の余分なコーティング剤を除去する。
乾燥条件についても特に制限されず、自然乾燥であっても加熱乾燥であってもよい。加熱乾燥である場合の乾燥温度は、使用するコーティング剤によっても異なるが、30~70℃であることが好ましく、40~60℃であることがより好ましい。なお、乾燥を制御することで、一部溶媒を残存させた塗膜を得ることができる。
本発明の細胞培養基材は、動物細胞を好適に培養することが可能である。動物細胞としては、由来は動物であればよく、ヒト、マウス、サル等が挙げられる。細胞種としては特に限定は無いが、上皮細胞(角膜上皮細胞など)、内皮細胞(ヒト臍帯静脈内皮細胞など)、線維芽細胞(ヒト皮膚線維芽細胞、マウス線維芽細胞など)、血球細胞、収縮性細胞(骨格筋細胞、心筋細胞など)、血液と免疫細胞(赤血球、マクロファージなど)、神経細胞(ニューロン、グリア細胞など)、色素細胞(網膜色素細胞など)、肝細胞、軟骨細胞、骨芽細胞、幹細胞(ES細胞、iPS細胞、造血幹細胞、皮膚幹細胞、生殖幹細胞、EC細胞、EG細胞、神経幹細胞)等が挙げられる。
ブロックポリマー1の合成
ブチルアクリレート(和光純薬株式会社製)0.59g、RAFT剤として2-(ドデシルチオカルボノチオイルチオ)プロパン酸0.0065g、Dimethyl 2,2’-azobis(2-methylpropionate)0.0036g、tブタノール9.0g、水1.0gを十分に窒素バブリングして酸素を除去した後、70℃にて7時間攪拌して、第1の反応液を得た。この段階におけるブチルアクリレートのコンバージョンは81%であった。
次いで、N-イソプロピルアクリルアミド(以下NIPAM、株式会社KJケミカル製)10・53g、tブタノール49.86g、水5.54gの混合物を十分に窒素バブリングさせた後に、前述の反応液に添加し、更に70℃にて20時間攪拌した。反応終了後、反応液にメタノール66.7gを加えて、AB型の温度応答性ブロックポリマー溶液を得た。このブロックポリマーのコンバージョンをNMRで測定したところ、ブチルアクリレートのコンバージョンは100%、NIPAMのコンバージョンは99%であった。また、このブロックポリマーの分子量分布を測定したところ、Mn=220000、Mw=760000であった。後述する試験法でこのブロックポリマーの水ゲル分率を測定した結果を表1に示す。
前記合成例1で得られたブロックポリマー1をメタノールで希釈して0.5%溶液を作成し、35mmポリスチレンシャーレ(TCPS、IWAKI製)に60ul添加した。その後、80℃にて30分間乾燥させ、さらに純水に10分間浸漬させる操作を三回繰り返して洗浄し、40℃にて一晩乾燥させることで、細胞培養基材1を得た。この細胞培養基材を後述する試験法を用いて細胞培養性・剥離性の評価を行った結果を表1に示す。
前記培養基材0.1gを200メッシュのステンレス金網で包み、4℃の水中で20時間放置前後のサンプルを130℃の熱風乾燥機で2時間乾燥させた重量をそれぞれ測定し、冷水中に静置した前後の重量減少率を調べた。この値が高いほど、培養基材の耐水性が高く、培養基材からの水による溶出が起こり難いと言える。
培地はEagle’s minimal essential medium(E-MEM、GIBCO社製)500mLに50mL 牛胎児血清MEM Non-Essential Amino Acids Solution, 100X(GIBCO社製)を1mL, L-Glutamine, 200 mM Solution(GIBCO社製)を添加した。当該培地2mLと共に、細胞密度1.0×104 cell/cm2 となるようマウスBalb3T3細胞(JCRB細胞バンク)を播種し、播種3日後の培養性を顕微鏡下で観察し評価した。
○:基材無しTCPSのみでの培養結果と培養性が同等。
△:基材無しTCPSのみでの培養結果よりも培養性が悪い。
×:細胞が全く育たない。
前記細胞培養基材1上で、Balb3T3細胞を培養し、播種3日後に細胞剥離試験を行った。培養中の培地を除去後、4℃の冷培地を1mL加え、25℃の室温で20分放置した。剥離した細胞ごと培地を除去後、培養基材をリン酸緩衝生理食塩水(PBS(-))で洗浄した。洗浄後の細胞培養基材に対し、HistoChoice MB Tissue Fixative (amresco製)を1mL加え、室温で30分残存細胞を固定化後、除去した。その後、10%ギムザ染色液を1mL加え室温で1時間染色し、染色液を除去した後、水道水で洗浄し乾燥させた。ギムザ染色された細胞は目視で計測した。
○:細胞が完全に剥離した。
△:細胞が一部剥離した。
×:細胞が全く剥離しなかった。
ブチルメタクリレート(和光純薬製)1.92g、RAFT剤として2-(ドデシルチオカルボノチオイルチオ)プロパン酸0.06g、Dimethyl 2,2’-azobis(2-methylpropionate)0.012g、tブタノール10.8g、水1.2gを十分に窒素バブリングして酸素を除去した後、70℃にて7時間攪拌して第1の反応液を得た。この段階におけるブチルメタクリレートのコンバージョンは88%であった。
次いで、N-イソプロピルアクリルアミド(株式会社KJケミカル製)6.12g、tブタノール18g、水2.18gの混合物を十分に窒素バブリングさせた後に、前述の反応液に添加し、更に70℃にて20時間攪拌して、AB型の温度応答性ブロックポリマー溶液を得た。このブロックポリマーのコンバージョンをNMRで測定したところ、ブチルメタクリレートのコンバージョンは100%、NIPAMのコンバージョンは100%であった。また、このブロックポリマーの分子量分布を測定したところ、Mn=34000、Mw=51000であった。このポリマーの水ゲル分率の測定結果を表1に示す。
比較ブロックポリマー1を実施例1と同様の方法に従ってTCPSに塗布し、比較細胞培養基材1を作成した。その細胞培養性・剥離性を実施例1と同様に評価したところ、表1のようになった。
細胞培養基材を塗布しない状態の35mmポリスチレンシャーレ(TCPS、IWAKI製)に対し、細胞培養性・剥離性の評価を実施例1と同様に評価したところ、表1のようになった。
Claims (5)
- 下限臨界溶解温度を有するセグメントと、疎水性セグメントとのブロックポリマーを含有する細胞培養基材であって、該下限臨界溶解温度を有するセグメントの重合度が400-10000であることを特徴とする細胞培養基材。
- 前記疎水性セグメントが、下記式(1)で表されるモノマーを重合して得られるものである、請求項1に記載の細胞培養基材。
(上記式(1)中、R1は水素原子またはメチル基であり、R2はフェニル基、アルキル炭素数1~8のカルボキシアルキル基、アラルキル炭素数7~8のカルボキシアラルキル基、下記式(2)で表される基、下記式(3)で表される基のうちのいずれか1つを表す。
(上記式(2)において、nは2または3を表し、R3は炭素数1~3のアルキル基を表す。)
(上記式(2)において、R4およびR5は、それぞれ独立して水素原子または炭素数1~6のアルキル基を表し、R4およびR5の合計炭素数が5以上であることを表す。)) - 支持体上に積層されたことを特徴とする、請求項1から2のいずれかに記載の細胞培養基材。
- 平均膜厚が1000nm以下である、請求項3に記載の細胞培養基材。
- 支持体と請求項1~4のいずれかに記載の細胞培養基材とを有する細胞培養容器。
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02211865A (ja) | 1989-02-10 | 1990-08-23 | Kao Corp | 細胞培養支持体材料 |
WO2012029882A1 (ja) | 2010-08-31 | 2012-03-08 | 学校法人東京女子医科大学 | 細胞培養用温度応答性基材及びその製造方法 |
JP2013195399A (ja) * | 2012-03-22 | 2013-09-30 | Dainippon Printing Co Ltd | 細胞培養基材の検査方法及び検査装置、並びに細胞培養基材の製造方法 |
JP2014140384A (ja) * | 2014-04-30 | 2014-08-07 | Cellseed Inc | 培養細胞移動治具、及びその利用方法 |
WO2015093393A1 (ja) * | 2013-12-20 | 2015-06-25 | Dic株式会社 | 温度応答性細胞培養基材及びその製造方法 |
WO2016199552A1 (ja) * | 2015-06-10 | 2016-12-15 | 株式会社日立製作所 | 細胞培養容器及び細胞培養方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100480291C (zh) * | 2007-06-15 | 2009-04-22 | 北京化工大学 | 一种超分子结构温度敏感性水凝胶的制备方法 |
CN101205302B (zh) * | 2007-11-09 | 2011-05-11 | 中国科学技术大学 | 一种聚磷酸酯-聚己内酯三嵌段共聚物及其应用 |
CN102056983B (zh) * | 2008-06-12 | 2013-07-03 | Dic株式会社 | 有机无机复合物分散液及使用该分散液制造的细胞培养基材以及它们的制造方法 |
CN101293943B (zh) * | 2008-06-23 | 2011-05-11 | 天津工业大学 | 半乳糖基温度敏感型高分子水凝胶及其制备方法 |
CN101307123A (zh) * | 2008-07-02 | 2008-11-19 | 天津大学 | 温度诱导原位凝胶化的三嵌段共聚物及制备方法和应用 |
US20120015440A1 (en) * | 2008-09-08 | 2012-01-19 | Tokyo University Of Science Educational Foundation Administrative Org. | Spheroid composite, spheroid-containing hydrogel and processes for production of same |
JP5439551B2 (ja) * | 2011-08-15 | 2014-03-12 | 一般財団法人川村理化学研究所 | ブロック共重合体の塗膜 |
US9539338B2 (en) | 2013-04-22 | 2017-01-10 | Carnegie Mellon University | Polymer-based protein engineering methods to rationally tune enzyme activity, pH-dependence and stability |
US10808221B2 (en) * | 2014-12-22 | 2020-10-20 | Corning Incorporated | Proteinase-free coatings for colony passaging |
CN106317297B (zh) * | 2016-09-20 | 2018-04-10 | 顺德职业技术学院 | 应用于3d打印的温敏培养表面复合材料 |
WO2018116904A1 (ja) * | 2016-12-22 | 2018-06-28 | Dic株式会社 | 細胞培養基材 |
CN108929412B (zh) * | 2018-07-10 | 2020-10-23 | 南昌大学 | 一种温度响应的粘附性可注射水凝胶的制备方法 |
-
2017
- 2017-12-12 WO PCT/JP2017/044506 patent/WO2018116902A1/ja unknown
- 2017-12-12 US US16/467,526 patent/US11427803B2/en active Active
- 2017-12-12 JP JP2018535908A patent/JP6447787B2/ja active Active
- 2017-12-12 KR KR1020197014078A patent/KR102465721B1/ko active IP Right Grant
- 2017-12-12 CN CN201780079493.4A patent/CN110099996A/zh active Pending
- 2017-12-12 EP EP17884382.7A patent/EP3561044A4/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02211865A (ja) | 1989-02-10 | 1990-08-23 | Kao Corp | 細胞培養支持体材料 |
WO2012029882A1 (ja) | 2010-08-31 | 2012-03-08 | 学校法人東京女子医科大学 | 細胞培養用温度応答性基材及びその製造方法 |
JP2013195399A (ja) * | 2012-03-22 | 2013-09-30 | Dainippon Printing Co Ltd | 細胞培養基材の検査方法及び検査装置、並びに細胞培養基材の製造方法 |
WO2015093393A1 (ja) * | 2013-12-20 | 2015-06-25 | Dic株式会社 | 温度応答性細胞培養基材及びその製造方法 |
JP2014140384A (ja) * | 2014-04-30 | 2014-08-07 | Cellseed Inc | 培養細胞移動治具、及びその利用方法 |
WO2016199552A1 (ja) * | 2015-06-10 | 2016-12-15 | 株式会社日立製作所 | 細胞培養容器及び細胞培養方法 |
Non-Patent Citations (2)
Title |
---|
MELLATI A.: "Influence of polymer molecular weight on the in vitro cytotoxicity of poly (N-isopropylacrylamide)", MATERIALS SCIENCE AND ENGINEERING C, vol. 59, 22 October 2015 (2015-10-22), pages 509 - 513, XP029329711, ISSN: 0928-4931, DOI: 10.1016/j.msec.2015.10.043 * |
See also references of EP3561044A4 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2020014453A (ja) * | 2018-07-13 | 2020-01-30 | 東ソー株式会社 | 幹細胞の培養基材及び幹細胞の製造方法 |
JP2020015892A (ja) * | 2018-07-13 | 2020-01-30 | 東ソー株式会社 | ブロック共重合体及び培養基材、幹細胞の製造方法 |
JP7293683B2 (ja) | 2018-07-13 | 2023-06-20 | 東ソー株式会社 | ブロック共重合体及び培養基材、幹細胞の製造方法 |
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EP3561044A4 (en) | 2020-09-02 |
US11427803B2 (en) | 2022-08-30 |
KR20190094149A (ko) | 2019-08-12 |
US20190367870A1 (en) | 2019-12-05 |
CN110099996A (zh) | 2019-08-06 |
JPWO2018116902A1 (ja) | 2019-01-17 |
KR102465721B1 (ko) | 2022-11-09 |
JP6447787B2 (ja) | 2019-01-09 |
EP3561044A1 (en) | 2019-10-30 |
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