WO2008143149A1 - 寸法が保持された細胞シート、その製造方法、及びそのための細胞培養担体 - Google Patents
寸法が保持された細胞シート、その製造方法、及びそのための細胞培養担体 Download PDFInfo
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- WO2008143149A1 WO2008143149A1 PCT/JP2008/058985 JP2008058985W WO2008143149A1 WO 2008143149 A1 WO2008143149 A1 WO 2008143149A1 JP 2008058985 W JP2008058985 W JP 2008058985W WO 2008143149 A1 WO2008143149 A1 WO 2008143149A1
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- 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
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- 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
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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
Definitions
- Cell sheet having dimensions, manufacturing method thereof, and cell culture carrier therefor
- the present invention can be used in fields related to cell tissue-based pharmaceuticals, for example, therapeutic fields such as regenerative medicine, drug discovery fields, diagnostic fields, examination fields, and the like. Manufacturing method and use in such method
- the present invention relates to a cell culture carrier.
- the technology for producing cell sheets is an important technology in the field of tissue engineering, but there are several problems.
- Patent Document 1 discloses a technique in which a temperature-responsive polymer is disposed on the surface of a cell culture substrate to facilitate cell sheet peeling, and the cell sheet is peeled off by changing the temperature after cell sheet culture.
- this technique is not applicable to all cell types, and some cell types are difficult to detach.
- the problem that the cell sheet after detachment contracts has not been solved.
- it is difficult to make a thick cell sheet with this technology is also the problem that it is difficult to make a thick cell sheet with this technology.
- Patent Document 2 discloses a technique for coating the surface of a support with fibrin glue for the purpose of facilitating cell sheet peeling.
- Patent Document 2 describes that fibrin glue is decomposed and lost by an enzyme contained in cells, and the cells are suspended while being bound in a sheet shape, so that the cell sheet can be easily detached.
- it is difficult to say that sufficient peelability is achieved since the cell sheet is peeled off using a scraper.
- Some may not be able to fully degrade fibrin glue.
- the problem that the cell sheet shrinks after peeling has not been solved.
- This technique also discloses a technique for facilitating peeling of the cell sheet by controlling the adhesive force between the cell sheet and the culture substrate (see, for example, Patent Documents 3 to 6).
- neither technique is applicable to all cell types.
- the problem that the cell sheet contracts cannot be solved by these techniques.
- Patent Documents 7 and 8 describe a hydrogel thin film that has been vitrified to increase its shape maintenance power.
- Patent document 1 International publication WO 2002/008 38 No. 7 pamphlet Patent literature 2
- Patent Document 4 Japanese Unexamined Patent Publication No. 2006-94 79 9
- Patent Document 5 Japanese Unexamined Patent Publication No. 2005-26 1 292
- Patent Document 6 Japanese Unexamined Patent Publication No. 2006-296896
- Patent Document 7 International Publication WO 2005/0 1 4 7 74 Pamphlet Patent Document 8 JP-A-8-228768 Disclosure of Invention
- the present invention aims to solve these problems.
- the present invention includes the following inventions.
- the organic thin film is formed of a polymer compound, and the dry weight per unit area of the polymer compound is 5 to 100 / ⁇ (: 111 2.
- the cell layer is used as the support-supporting culture membrane.
- a method for producing a support-carrying cell sheet comprising peeling off from the substrate to obtain a support-carrying cell sheet comprising the support-carrying culture membrane and a cell layer.
- FIG. 1 (a) is a top view of the cell culture carrier of the present invention.
- FIG. 1 (b) is a cross-sectional view taken along the line AA ′ of the cell culture carrier of the present invention shown in FIG. 1 (a).
- FIG. 2 is a schematic diagram showing how to use the cell culture carrier.
- FIG. 3 shows a multilayer support-carrying cell sheet 9 obtained by laminating a plurality of support-carrying cell sheets 8.
- FIG. 4 is a schematic view showing a method for producing a contraction-inhibiting cell sheet.
- FIG. 5 is a top view of a cell culture carrier having a patterned organic thin film.
- Fig. 6 shows a phase contrast micrograph of the support-retaining cell sheet of sushi aortic vascular endothelial cells.
- Fig. 7 shows a confocal micrograph of the support-retaining cell sheet of sushi aortic vascular endothelial cells.
- (1) indicates the cell nucleus and (2) indicates the collagen thin film.
- FIG. 8 shows a confocal photomicrograph of a laminate of support-retaining cell sheets of sushi aortic vascular endothelial cells stained with force Lucin.
- Figure 9 shows the results of cross-sectional observation of a confocal microscope (bottom of Fig. 9) and a schematic view of the cross-section when a sheet of support-retaining cell sheets of sushi aortic vascular endothelial cells is stained with force Lucin. 9 Top)
- Fig. 10 shows a phase contrast micrograph (bottom of Fig. 10) after laminating a support-supporting culture membrane on a support-supporting cell sheet of sushi aortic vascular endothelial cells and culturing for 2 days, and a schematic diagram of the cross section (Fig. 1 above).
- Fig. 11 is a phase contrast micrograph of a laminate of fibroblast support-retaining cell sheets.
- Figure 12 shows the co-lamination of the vascular endothelial cell and fibroblast support-supporting cell sheet.
- Fig. 13 shows the observation results of the patterned support-bearing cell sheet.
- Fig. 4 shows an organic thin film-coated support-supporting cell sheet 1 in which the organic thin film 2 of the support-supporting culture membrane 4 is coated on the surface of the support-supporting cell sheet 8 on which the cell layer is formed
- Fig. 15 shows an organic thin film-coated multilayer support-carrying cell sheet 1 3 formed by coating the organic thin film 2 of the support-carrying culture film 4 on the surface of the cell layer of the multilayer support-carrying cell sheet 9 formed on the surface.
- FIG. Fig. 1 (a) is a top view of the cell culture carrier 1
- Fig. 1 (b) is a cross-sectional view taken along the line A-A '.
- the cell culture carrier 1 is composed of an organic thin film 2 having cell adhesiveness and biodegradability, and a frame-like support for holding the dimensions of the organic thin film 2 fixed to the periphery of the organic thin film 2 3 and a substrate 6 having a surface 5 having a static water contact angle of 45 ° ′ or less.
- the support-supporting culture membrane 4 is detachably installed on the surface 5 of the substrate 6. (How to use cell culture carrier)
- FIG. 2 (a) A method of using the cell culture carrier 1 will be described with reference to FIG.
- desired cells are cultured on the organic thin film 2 to form a sheet-like cell layer 7.
- the cell layer 7 is peeled off from the substrate 6 together with the support-supporting culture membrane 4 (FIG. 2 (b)), and consists of the support-supporting culture membrane 4 and the cell layer 7 formed on the membrane 4.
- a support-retaining cell sheet 8 is obtained (FIG. 2 (c)).
- a plurality of support-supporting cell sheets 8 may be laminated to form a multilayer support-supporting cell sheet 9.
- the support-supporting cell sheet 8 or the multilayer support-supporting cell sheet 9 produced in this manner is easily contracted because it does not shrink even if it is peeled off from the substrate 6 because the peripheral edge is held by the support 3. it can.
- the support-supporting cell sheet 8 or the multilayer support-supporting cell sheet 9 can be separated from the support 3 after being transplanted into a living body or the like. Further, if the support 3 is formed of a biodegradable material, it is not necessary to separate the support 3 after transplantation.
- the individual support-carrying cell sheet for producing the multilayer support-carrying cell sheet may be a cell sheet of the same type of cells or a cell sheet of different types of cells.
- the surface of the support-carrying cell sheet 8 or the multilayer support-carrying cell sheet 9 on which the cell layer is formed may be further coated with an organic thin film having cell adhesion and biodegradability.
- the organic thin film used for coating may be the same as the organic thin film constituting the support-holding culture membrane.
- a support-supported culture membrane shown in FIG. 1 or the like having a peripheral edge supported by a frame-like support can be preferably used.
- Fig. 14 shows the surface of the support-carrying cell sheet 8 on which the cell layer is formed, which is coated with the organic thin film 2 of the support-carrying culture membrane 4. An example is shown.
- the support-carrying cell sheet 8 or the multilayer support-carrying cell sheet 9 can be further processed into a contraction-inhibiting cell sheet 11. That is, a biodegradable sheet 10 having sufficient strength and cell adhesion is laminated on the multilayer support-carrying cell sheet 9 (FIG. 4 (b)), and maintained for a certain period of time to adhere both. Subsequently, the shrinkage-suppressing cell sheet 11 is obtained by removing the support 3 (FIG.
- FIG. 4 shows an example using the multilayer support-carrying cell sheet 9
- a single-layer support-carrying cell sheet can be similarly processed into a contraction-inhibiting cell sheet.
- Multiple biodegradable sheets may be used.
- a laminate of a plurality of contraction-inhibiting cell sheets is also included in the contraction-inhibiting cell sheet of the present invention.
- the organic thin film may be patterned.
- the support-carrying cell sheet produced using the cell culture carrier 1 ′ having the organic thin film 2 patterned in this manner has pores at desired positions.
- a multilayer cell sheet obtained by laminating a plurality of such support-carrying cell sheets has a void at a desired position, so that oxygen or the like can be supplied to the inside of the thick cell sheet, resulting in cell necrosis. It is expected that problems such as these can be solved.
- the organic thin film is not particularly limited as long as it has cell adhesion and biodegradability, but is preferably made of a biological material.
- Specific materials include various collagens, peptide hydrogenores, laminin, chondronectin, glycosaminodarlicans, hyaluronic acid, proteodaricans, extracellular matrix component proteins other than those described above, and mouse EHS tumor extracts.
- Examples include gels made of polymer compounds such as membrane components (trade name: Matrigel), gelatin, agarose, oligonucleic acid, and polynucleic acid.
- artificially synthesized biomaterial imitation materials that are not extracted from living organisms are also preferred.
- examples thereof include various artificial peptides and derivatives thereof, artificial oligopeptides and derivatives thereof, artificial polypeptides and derivatives thereof, artificial polysaccharides and derivatives thereof.
- the dry weight per unit area of the polymer compound is 5 to 100 ⁇ g / cm 2 , preferably 20 to 40 ⁇ 8 ⁇ .
- the thickness is m 2 . Since the organic thin film is so thin, it is considered that when the cell sheets produced according to the present invention are stacked, a network is easily formed between the cell layers, and a paraclinic cell-layer interaction is expected. You can also Since the support-supported cell sheet obtained in the present invention suppresses the dimensional change of the organic thin film due to shrinkage of the cell sheet or the like by the peripheral support, a thin organic thin film that can be expected to have such advantageous effects is used. But it is easy to handle.
- the base material having a surface with a static water contact angle of 45 ° or less used in the present invention has a sufficiently weak adhesion to an organic thin film (however, it does not peel off naturally under normal cell culture conditions) Therefore, even a very thin organic film can be recovered without being damaged when it is peeled off from the substrate surface.
- the organic thin film may be patterned into a desired shape.
- a patterning method after the organic thin film is formed, the organic thin film is etched only in a specific region with a dissolving agent, a liquid organic material is directly applied to the substrate in a pattern with an ink jet or the like, and dried.
- There are methods such as adhering to a substrate and then producing an organic thin film to remove the resist, and applying a liquid organic substance to the substrate through a mask with holes and drying.
- a frame-shaped support for holding the dimensions of the organic thin film is fixed to the periphery of the organic thin film.
- the material of the support is not particularly limited as long as it can be bonded to the organic thin film.
- it is a polymer such as polyimide, polyester, nylon, or a biodegradable polymer such as polylactic acid.
- the thickness of the support is not particularly limited as long as it is strong enough to withstand the lateral contraction of the cell layer, but it is preferably thinner than the cell layer to be cultured. 1 to 20 m is preferred. It is more preferable that the support is biodegradable and can be transplanted as it is.
- the whole including the organic thin film and the support fixed to the periphery thereof is referred to as a support-supporting culture membrane.
- the support-supporting culture membrane is detachably installed on the base material, and after cell culture on the organic thin film, the support portion can be picked using tweezers and peeled off from the base material.
- the substrate has a surface with a static water contact angle of 45 ° or less, and the support-supporting culture membrane is in contact with the surface.
- a substrate surface having such a static water contact angle generally tends to have cell adhesion inhibition properties.
- Such a cell adhesion-inhibiting surface can be obtained by forming a film of an organic compound having a carbon-oxygen bond on the surface of the substrate.
- the base material is preferably a material capable of forming a film of an organic compound having a carbon-oxygen bond on its surface.
- inorganic materials such as metal, glass, ceramics, silicon, elastomers, plastics (for example, polyester resin, polyethylene resin, polypropylene resin, ABS resin, nylon, acrylic resin, fluorine resin, polycarbonate resin) And organic materials represented by polyurethane resin, methylpentene resin, phenol resin, melamine resin, epoxy resin, and chlorinated vinyl resin).
- the shape is not limited, and examples thereof include flat shapes such as flat plates, flat membranes, films, and porous membranes, and three-dimensional shapes such as cylinders, stamps, multi-well plates, and micro flow channels.
- its thickness is not particularly limited, but is usually 0.1 to 1 000; / m, preferably 1 to 500 ⁇ , more preferably 10 to 2 000 m. is there.
- the cell adhesion-inhibiting surface can be formed by a hydrophilic film formed of an organic compound having a carbon-oxygen bond and having a static water contact angle of 45 ° or less.
- the carbon-oxygen bond means a bond formed between carbon and oxygen, and is not limited to a single bond but may be a double bond.
- the main raw materials for the hydrophilic film include hydrophilic organic compounds such as water-soluble polymers, water-soluble oligomers, water-soluble organic compounds, surfactants, and amphiphiles. These are physically or chemically cross-linked with each other and physically or chemically bonded to the base material to form a hydrophilic film.
- Specific water-soluble polymer materials include polyalkylene dallicol and derivatives thereof, polyacrylic acid and derivatives thereof, polymethacrylic acid and derivatives thereof, polyacrylamide and derivatives thereof, polyvinyl alcohol and derivatives thereof, Examples include zwitterionic polymers, polysaccharides, and the like. Examples of the molecular shape include linear, branched, and dendrimers. More specifically, a copolymer of polyethylene glycol, polyethylene glycolate and polypropylene darconole, for example, Pluronic F108, Pluronic F127, poly (N-isopropylalkylamide), poly (N-vinyl-2-pyrrolidone).
- water-soluble oligomer materials and water-soluble low-molecular compounds include alkylene glycol oligomers and derivatives thereof, acrylic acid oligomers and derivatives thereof, methacrylic acid oligomers and derivatives thereof, acrylamide oligomers and derivatives thereof, and blu-oligomer acetate.
- zwitterionic monomers oligomers and derivatives thereof acrylic acid and derivatives thereof, methacrylic acid and derivatives thereof, acrylamide and derivatives thereof, zwitterionic compounds, water-soluble silane coupling agents, water-soluble A thiol compound etc. can be mentioned.
- ethylene diol oligomer (N-isopropyl acrylamide) oligomer, methacryloyloxychetyl phosphorylcholine oligomer, low molecular weight dextran, low molecular weight heparin, oligoethylene glycol thiol Nore, Ethylene Glycol Nole, Diethylene Glycol Nore, Triethylene Glycol Nore, Tetraethylene Daricol, 2- (Methoxy (Polyethyleneoxy)) Propyltrimethoxysilane, and Triethylene Daricol One Terminate One Thirty However, it is not limited to these.
- the average thickness of the hydrophilic membrane is 0.8 ⁇ ! ⁇ 500 m, preferably 0.8 n m to l 0 0 / x m, 1 ⁇ ! ⁇ 10 ⁇ m is more preferable, and 1.5 ⁇ to 1 ⁇ m is most preferable.
- An average thickness of 0.8 nm or more is preferable because it is difficult to be affected by a region not covered with a hydrophilic film on the substrate surface in protein adsorption or cell adhesion. If the average thickness is 500 / xm or less, coating is relatively easy.
- the method of forming a hydrophilic film on the substrate surface is to directly absorb the hydrophilic organic compound into the substrate.
- a method of coating, a method of directly coating a substrate with a hydrophilic organic compound, a method of coating a substrate with a hydrophilic organic compound and then a crosslinking treatment, and a hydrophilicity in a multi-stage manner to improve adhesion to the substrate A method of forming a film, a method of forming a base layer on a base material in order to improve adhesion to the base material, and then coating a hydrophilic organic compound, forming a polymerization initiation point on the substrate surface, and then hydrophilicity Examples thereof include a method for polymerizing a polymer brush.
- particularly preferable methods include a method of forming a hydrophilic film in a multistage manner, and a base layer is formed on the base material in order to improve adhesion to the base material, and then hydrophilicity is formed. And a method of coating a conductive organic compound. This is because it is easy to improve the adhesion of the hydrophilic organic compound to the substrate by using these methods.
- the term “bonding layer” is used. The bonding layer means a layer existing between the outermost hydrophilic film layer and the substrate when a film of a hydrophilic organic compound is formed in a multistage manner, and a base layer is provided on the substrate surface.
- the binding layer is preferably a layer containing a material having a binding portion (linker).
- the combination of the linker and the functional group at the end of the material to be bonded to the linker includes epoxy group and hydroxyl group, phthalic anhydride and hydroxyl group, carboxyl group and N-hydroxysuccinimide, canoleboxyl group and carbodiimide. And amino groups and dartal aldehydes. In each combination, either may be the linker.
- a bonding layer is formed from a material having a linker on a substrate.
- the density of the material in the tie layer is an important factor that defines the bond strength.
- the density can be easily evaluated using the contact angle of water on the surface of the bonding layer as an index. For example, taking an epoxy group-terminated silane coupling agent (epoxysilane) as an example, the water contact angle of the substrate surface to which epoxy silane is added is typically 45 ° or more, preferably 47 ° or more. If there is, a substrate having sufficient cell adhesion inhibitory property can be produced by adding an ethylene-based recall material in the presence of an acid catalyst.
- epoxy group-terminated silane coupling agent epoxysilane
- the biodegradable sheet for producing the shrinkage-suppressing cell sheet Therefore, there is no particular limitation as long as it has a strength that does not deform, that is, a strength sufficient to withstand deformation due to contraction of the cell sheet (referred to as “sufficient strength” in the present invention) and cell adhesion.
- Examples include polylactic acid, poly (lactic acid monobutyric acid) copolymer, polybutyric acid, polydaricolic acid, collagen and its cross-linked body, gelatin and its cross-linked body, artificial polypeptide and its cross-linked body.
- the method for producing the cell culture carrier of the present invention is not particularly limited.
- a solution for forming the organic thin film is applied on the surface of the base material, and then a support is placed on the coating film of the solution. And it can manufacture by completing the formation process of organic thin films, such as gelatinization, in the state which mounted the support body.
- the cells cultured using the cell culture carrier of the present invention may be floating cells such as blood cells and lymphoid cells, and may be adhesive cells, but the present invention is directed to cells having adhesiveness.
- the present invention is directed to cells having adhesiveness.
- examples of such cells include liver cells that are liver cells, Kupffer cells, endothelial cells such as vascular endothelial cells and corneal endothelial cells, fibroblasts, osteoblasts, osteoclasts, and periodontal ligaments.
- epidermal cells such as epidermal keratinocytes, tracheal epithelial cells, gastrointestinal epithelial cells, cervical epithelial cells, epithelial cells such as corneal epithelial cells, breast cells, perisite, smooth muscle cells and muscle cells such as cardiomyocytes
- epidermal cells such as epidermal keratinocytes, tracheal epithelial cells, gastrointestinal epithelial cells, cervical epithelial cells, epithelial cells such as corneal epithelial cells, breast cells, perisite, smooth muscle cells and muscle cells such as cardiomyocytes
- Examples include cells, kidney cells, knee Langerhans islet cells, nerve cells such as peripheral nerve cells and optic nerve cells, cartilage cells, and bone cells. These cells may be primary cells collected directly from tissues or organs, or they may be passaged several times.
- these cells are undifferentiated embryonic stem cells, pluripotent stem cells such as pluripotent mesenchymal stem cells, and unipotent stem cells such as unidirectional vascular endothelial progenitor cells. Any of the cells obtained may be used. In addition, the cells may be cultured as a single species, or two or more cells may be co-cultured.
- a sheet-like cell layer By culturing a cell culture carrier seeded with these cells in a culture solution, a sheet-like cell layer can be formed.
- any cell culture medium usually used in the art can be used without any particular limitation.
- use MEM medium, BME medium, DME medium, ⁇ medium, I MDM medium, ES medium, ⁇ —60 medium, Fisher medium, F 12 medium, WE medium and RPM I 1 640 medium And the like for example, the basic culture medium described in “Tissue Culture Technology 3rd Edition” edited by Asakura Shoten, edited by the Japanese Tissue Culture Society, page 58
- serum such as rabbit fetal serum
- various growth factors, antibiotics, amino acids, etc. may be added to the basal medium.
- a commercially available serum-free medium such as Gibeo serum-free medium (Invitrogen) can also be used.
- Example 1 The present invention will be specifically described below based on examples, but the contents of the present invention are not limited to the contents of the examples.
- Example 1 The present invention will be specifically described below based on examples, but the contents of the present invention are not limited to the contents of the examples.
- O g, TS L 83 50 (manufactured by GE Toshiba Silicone) 0.8 g were mixed, and triethylamine 450 1 was added while stirring. After stirring for several minutes at room temperature, the whole amount was transferred to a glass dish.
- a 10 cm square glass substrate that had been cleaned with UV was immersed and allowed to stand at room temperature for 16 hours. Thereafter, the glass substrate was washed with ethanol and water and dried by nitrogen blowing. Next, 25 g of concentrated sulfuric acid was added dropwise while stirring 50 g of tetraethylene glycol (TEG). After stirring for several minutes, the whole amount was transferred to a glass dish. Immerse the above substrate here, 8
- the reaction was carried out at 0 ° C for 20 minutes. After the reaction, the substrate was thoroughly washed with water and dried by nitrogen blowing. As a result, a film containing TEG was formed on the glass substrate surface.
- the surface static water contact angle was approximately 30 °. This substrate was cut into a size of 25 mm ⁇ 15 mm and used as a base material having a static water contact angle of 45 ° or less and cell adhesion inhibition.
- a polyethylene terephthalate film (thickness 16 ⁇ , outer dimension 25 mm ⁇ 15 mm, inner dimension 20 mm ⁇ 9 mm, Teijin DuPont Finolem) was used.
- Collagen gel culture kit (Cellmatrix I 1 A, Nitta Gelatin) was used to prepare a collagen solution with a final concentration of 2.4 mg nom 1 on ice. Of this, 40 ⁇ 1 was prepared at 1 _ 1 In addition to the base material, it was gelled with the support at 37 ° C for 1 hour, and then dried in a clean bench for 3 hours to produce a collagen thin film.
- the result of measuring the thickness of the collagen thin film with a stylus type surface shape measuring instrument was 7 70 ⁇ 19 l nm.
- the collagen thin film produced in this way was adhered to the substrate even after PBS was added and hydrated.
- Example 1 Change the collagen content per unit area of substrate in the range of 5 to 1 50 Ug Z cm 2
- the substrate was compared with polystyrene (cell culture dish, FALCON), glass, and a substrate chemically treated by the method of 1 of 1 of Example 1. Otherwise, the experiment was performed in the same manner as in Example 1. went.
- the support-supporting cell sheet is detached from the substrate, the collagen thin film is torn, so that most of the cells remain on the substrate, or the collagen thin film is not torn and most of the cells remain in the cell sheet.
- Table 1 and Table 2 show the relationship between defective products and non-defective products.
- the static water contact of the polystyrene, glass, and substrates chemically treated by the method of 1 in 1 of Example 1 was 51 °, almost 0 ° (unmeasurable), and 30 °, respectively. It was.
- the support-retained cell sheet produced in the same manner as described above in Example 1 is overlaid so that the collagen thin film and the cells are in contact with each other, and the support-retained cell sheet is slightly immersed in the medium.
- the medium was sucked out and the same support-supporting cell sheet was brought into contact with the surface tension.
- the culture medium was added so that the multilayer support-supporting cell sheet was sufficiently immersed in the culture medium after 4 hours of overlap, the support-supporting cell sheets were adhered to each other and moved together when one of the support-supporting cell sheets was moved. Laminate 4 layers by the same operation
- Example 5 Add a suitable amount of MEM medium containing 5% urchin fetal serum to the cell culture carrier containing the collagen thin film prepared in 1 and 1 and 1 and 1 in Example 1, and after hydration, the support is picked up with tweezers and pulled up. The retention culture membrane (collagen thin film) was desorbed and recovered from the substrate. This support-supporting culture membrane was laminated on the support-supporting cell sheet prepared in Example 1 and cultured for 2 days to form an organic thin film-coated support-supporting cell sheet. The results observed with a phase contrast microscope (FIG. 10) ), Usashi aortic vascular endothelial cells were transformed into a network.
- MEM medium containing 5% urchin fetal serum
- Example 6 An appropriate amount of DMEM medium containing 10% sushi fetal serum was added to the cell culture carrier containing the collagen thin film prepared in 1 and 1 and 1 and 1 of Example 1.
- 2.0 ⁇ 10 5 mouse fibroblasts were seeded per substrate.
- the support-carrying cell sheet could be detached and recovered from the substrate in the same manner as in Example 1 1-13, and the support-carrying cell sheet did not cause cell contraction and could be handled by the support.
- the support-retaining cell sheets were laminated in the same manner as in Example 3, and after laminating the three layers and culturing for 2 days, the results were observed with a phase-contrast microscope (FIG. 11). There was no change in the shape of the network like vascular endothelial cells.
- Example 6 An appropriate amount of DMEM medium containing 10% sushi fetal serum was added to the cell culture carrier containing the collagen thin film prepared in 1 and 1 and 1 and 1 of Example 1.
- 2.0 ⁇ 10 5 mouse fibroblasts were seeded per substrate.
- Example 5 Co-lamination of cell sheets of vascular endothelial cells and fibroblasts
- the mouse fibroblast support-supporting cell sheet prepared in Example 5 was overlaid on the susceptor aortic vascular endothelial cell support-supporting cell sheet prepared in Example 1 so that the cells and the collagen thin film were adhered.
- DMEM medium containing 10% sushi fetal serum was added so that the support-retaining cell sheet was slightly immersed in the medium, and the layers were laminated in the same manner as in Example 3.
- Example 7 the urinary aortic vascular endothelial cell support-retaining cell sheet prepared in Example 1 was laminated in the same manner, and the vascular endothelial cell and fibroblast support-retaining cell sheet were co-laminated and cultured for 3 days. As a result of observation with a phase contrast microscope (Fig. 12), the cell layers were adhered to each other.
- Example 7 the urinary aortic vascular endothelial cell support-retaining cell sheet prepared in Example 1 was laminated in the same manner, and the vascular endothelial cell and fibroblast support-retaining cell sheet were co-laminated and cultured for 3 days. As a result of observation with a phase contrast microscope (Fig. 12), the cell layers were adhered to each other.
- Fig. 12 phase contrast microscope
- Example 8 After laminating a strong collagen sheet (thickness: 30 / im, two strands) on the support-retaining cell sheet laminated in two layers in Example 3, the support was ultrasonicated. As a result of separation with a force cutter, the cell sheet did not contract.
- a strong collagen sheet thickness: 30 / im, two strands
- Example 9 When collagenase is added to one part of the cell culture carrier containing the collagen thin film prepared in Example 1, the collagen at that part is decomposed, and the decomposed collagen is detached from the base material.
- a cell culture carrier was prepared. Here, 2.0 ⁇ 10 5 rabbit aortic vascular endothelial cells were seeded per substrate. 24 After culturing for 4 hours, the cells did not adhere to the site where the collagen was detached, and the cells adhered only to the site where the collagen thin film was present. The support-supported cell sheet patterned by picking up the support with tweezers was pulled up and removed from the substrate (FIG. 13).
- Example 9 Example 9
- the reaction was carried out at 0 ° C for 20 minutes. After the reaction, the substrate was thoroughly washed with water and dried by nitrogen blowing. As a result, a film containing TEG was formed on the glass substrate surface.
- the static water contact angle of the surface was approximately 30 °.
- This substrate was cut into a size of 25 mm ⁇ 15 mm and used as a base material having a static water contact angle of 45 ° or less and cell adhesion inhibition. After autoclaving the base material, add an appropriate amount of 5% ushi fetal serum-containing MEM medium, seeding 2.0 x 10 5 sushi aortic vascular endothelial cells per substrate, and in the incubator ( When cells were cultured for 24 hours at 37 ° C. and 5% CO 2 ), no cells adhered to the substrate surface.
- Polyethylene terephthalate film (thickness 16 ⁇ m outer dimension 2)
- Example 9 Experiments were performed in the same manner as in Example 9 except that the collagen content per unit area of the base material was changed within the range of SS / zg Z cm 2 .
- the collagen thin film is torn, for example, so that most of the cells remain on the substrate, or the collagen thin film does not break and most of the cells are separated from the cell sheet.
- Table 3 shows the relationship between defective products and non-defective products.
- the support-retained cell sheet prepared in the same manner is overlaid on the support-retained cell sheet prepared in Example 9 so that the collagen thin film and the cells are in contact with each other, and the support-retained cell sheet is slightly immersed in the medium.
- the medium was sucked out and the same support-supporting cell sheet was brought into contact with the surface tension.
- the culture medium was added so that the multilayer support-supporting cell sheet was sufficiently immersed in the culture medium after 4 hours of overlap, the support-supporting cell sheets were adhered to each other, and moved together with the movement of one support-supporting cell seed.
- a cell sheet that can be easily detached from a cell culture carrier and in which shrinkage after the separation is suppressed.
- the peeling of the cell sheet according to the present invention does not use the change in the binding property between the cells and the substrate, and therefore can be applied regardless of the cell type.
- the organic thin film is appropriately patterned in the cell culture carrier of the present invention, the distribution of cells can be easily controlled, and a thick tissue body can be formed.
- the cell sheet comprising the organic thin film and the cell layer obtained by the present invention can make the organic thin film layer portion thinner than the techniques described in Patent Documents 7 and 8, the cell sheet adjacent at the time of stacking However, it is thought that it is easy to form a network, and a paracrine cell-layer interaction can be expected.
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Abstract
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/599,675 US8685733B2 (en) | 2007-05-11 | 2008-05-09 | Cell sheet having good dimensional stability, method for production thereof, and cell culture carrier for use in the method |
EP08752839.4A EP2151492B1 (en) | 2007-05-11 | 2008-05-09 | Cell sheet having good dimensional stability, method for production thereof, and cell culture carrier for use in the method |
JP2009515198A JP5257355B2 (ja) | 2007-05-11 | 2008-05-09 | 寸法が保持された細胞シート、その製造方法、及びそのための細胞培養担体 |
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Also Published As
Publication number | Publication date |
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JP2013138691A (ja) | 2013-07-18 |
US8685733B2 (en) | 2014-04-01 |
JP5614471B2 (ja) | 2014-10-29 |
EP2626413A1 (en) | 2013-08-14 |
EP2626413B8 (en) | 2016-07-20 |
EP2151492A4 (en) | 2010-05-26 |
EP2151492B1 (en) | 2015-03-04 |
JP5257355B2 (ja) | 2013-08-07 |
US20110151565A1 (en) | 2011-06-23 |
EP2151492A1 (en) | 2010-02-10 |
JPWO2008143149A1 (ja) | 2010-08-05 |
EP2626413B1 (en) | 2016-05-18 |
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