WO2015122528A1 - 細胞培養装置 - Google Patents
細胞培養装置 Download PDFInfo
- Publication number
- WO2015122528A1 WO2015122528A1 PCT/JP2015/054222 JP2015054222W WO2015122528A1 WO 2015122528 A1 WO2015122528 A1 WO 2015122528A1 JP 2015054222 W JP2015054222 W JP 2015054222W WO 2015122528 A1 WO2015122528 A1 WO 2015122528A1
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- WIPO (PCT)
- Prior art keywords
- shaft member
- culture
- filter
- opening
- cell culture
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- 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
- C12M23/02—Form or structure of the vessel
- C12M23/08—Flask, bottle or test tube
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- C—CHEMISTRY; METALLURGY
- 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
- C12M23/38—Caps; Covers; Plugs; Pouring means
-
- C—CHEMISTRY; METALLURGY
- 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
- C12M27/00—Means for mixing, agitating or circulating fluids in the vessel
- C12M27/02—Stirrer or mobile mixing elements
-
- C—CHEMISTRY; METALLURGY
- 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
- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
- C12M29/04—Filters; Permeable or porous membranes or plates, e.g. dialysis
-
- C—CHEMISTRY; METALLURGY
- 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
- C12M33/00—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus
- C12M33/04—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus by injection or suction, e.g. using pipettes, syringes, needles
Definitions
- the present invention relates to a cell culture apparatus.
- the cell culture device described in Patent Document 1 has a disk-like body having at least a part of a filter region that allows a culture solution to pass therethrough but does not allow cells to pass therethrough.
- This disc-like body has a conduit for taking out the culture solution to the outside, and is provided so as to be rotatable coaxially with the conduit.
- Examples of cells cultured in the cell culture device include human iPS (induced pluripotent stem) cells.
- Human iPS cells have the property of being easily killed when the cells are brought into a single cell state or exposed to high shear stress. For this reason, when culturing human iPS cells, the cell culture apparatus should minimize shear stress on the cells as much as possible.
- a filter for sucking a culture solution is attached to a disc-like body as stirring means.
- the conventional apparatus is effective in reducing the stress on the cells because there is no obstacle that disturbs the liquid flow as compared with a configuration in which a facility for suctioning the culture medium is separately provided.
- the suction mechanism and the stirring mechanism rotate at the same time, a structure for ensuring the sealing performance in the rotation mechanism is required, and there is a problem that the structure becomes complicated.
- a cell culture device includes a culture tank that contains a culture solution containing cells, a shaft member that is at least partially disposed in the culture tank, and a shaft member that is supported by the shaft member and disposed in the culture tank. And a stirring means having a stirring blade that is rotatably provided with the shaft member as a rotation center, and a filter that is provided in contact with the shaft member and that allows the culture medium to permeate but does not allow cells to permeate. Is at least partly hollow, and is provided with an opening for introducing or leading out the culture medium from the inside, and is not rotatable, and the filter has the shaft member as the center of rotation.
- a filter is provided on a shaft member that is not rotatable.
- the stirring blade of the stirring means is provided to be rotatable about a shaft member as a rotation center.
- the stirring blade rotates with respect to the shaft member, and the shaft member and the filter do not rotate. Therefore, in the cell culture device, since the mechanism for sucking and / or supplying the culture solution is not rotated, the configuration can be simplified.
- the filter that sucks the culture solution from the culture tank and / or supplies the culture solution to the culture tank is positioned inside the movable region of the stirring blade in the shaft member that is the rotation center of the stirring blade.
- the culture medium is sucked from the culture tank and / or the culture liquid is supplied to the culture tank through the inside of the filter and the shaft member. Therefore, in the cell culture device, the filter is prevented from being disturbed by the liquid flow (laminar flow) generated by the rotation of the stirring blade, and the stress on the cells is reduced with respect to the suction and / or supply of the culture liquid. Can be planned. Therefore, in the cell culture device, cells can be cultured well while realizing a simple configuration.
- the shaft member may be supported on the bottom of the culture tank.
- the shaft member has an opening at the lower end and the upper end is closed, and a side surface of the shaft member is provided with an opening communicating with the inside.
- the filter may be provided on the outer surface of the shaft member so as to cover the opening of the side surface.
- the filter has a cylindrical shape and may be inserted outside the shaft member so as to cover the opening of the side surface. According to this configuration, the cell culture device can secure the surface area (membrane area) of the filter.
- the shaft member has a cylindrical shape in which an opening is provided at the lower end and an opening that communicates with the inside is provided at the upper end, and the filter has an opening at the upper end.
- the shaft member may be provided so as to cover the part.
- the filter has a bottomed cylindrical shape, and may be inserted outside the shaft member so as to cover the opening at the upper end. According to this configuration, the cell culture device can secure the surface area (membrane area) of the filter.
- the shaft member may be supported by the lid of the culture tank.
- the shaft member has a cylindrical shape in which an opening is provided at the upper end and an opening that communicates with the inside is provided at the lower end, and the filter has an opening at the lower end.
- the shaft member may be provided so as to cover the part.
- the filter has a bottomed cylindrical shape, and may be inserted outside the shaft member so as to cover the opening at the lower end. According to this configuration, the cell culture device can secure the surface area (membrane area) of the filter.
- the shaft member has an opening at the upper end and the lower end is closed, and the side of the shaft member is provided with an opening communicating with the inside.
- the filter may be provided on the outer surface of the shaft member so as to cover the opening of the side surface.
- the filter has a cylindrical shape and may be inserted outside the shaft member so as to cover the opening of the side surface. According to this configuration, the cell culture device can secure the surface area (membrane area) of the filter.
- the filter may be a porous body.
- cells can be cultured well while realizing a simple configuration.
- FIG. 1 is a diagram illustrating a cell culture system including the cell culture apparatus according to the first embodiment.
- FIG. 2 is a perspective view showing the cell culture device.
- FIG. 3 is a side view of the culture tank shown in FIG.
- FIG. 4 is a diagram showing a cross-sectional configuration along the line IV-IV in FIG.
- FIG. 5 is a side view showing a usage state of the cell culture device.
- FIG. 6 is a diagram illustrating a modification of the cell culture device of the first embodiment.
- FIG. 7 is a diagram showing another embodiment of a cell culture system provided with a cell culture device.
- FIG. 8 is a diagram showing another embodiment of a cell culture system provided with a cell culture device.
- FIG. 1 is a diagram illustrating a cell culture system including the cell culture apparatus according to the first embodiment.
- FIG. 2 is a perspective view showing the cell culture device.
- FIG. 3 is a side view of the culture tank shown in FIG.
- FIG. 4 is a diagram showing
- FIG. 9 is a diagram showing a cross-sectional configuration of the cell culture device according to the second embodiment.
- FIG. 10 is a diagram illustrating a modification of the cell culture device of the second embodiment.
- FIG. 11 is a diagram illustrating a modification of the cell culture device according to the second embodiment.
- FIG. 12 is a diagram illustrating a modification of the cell culture device according to the second embodiment.
- FIG. 13 is a diagram illustrating a modification of the cell culture device according to the second embodiment.
- FIG. 14 is a diagram showing a modification of the cell culture device of the second embodiment.
- FIG. 15 is a diagram illustrating the cell culture device according to the first embodiment.
- FIG. 16 is a diagram illustrating the cell culture device according to the second embodiment.
- FIG. 17 is a diagram showing a cell culture device according to Comparative Example 1.
- FIG. 1 is a diagram illustrating a cell culture system including the cell culture apparatus according to the first embodiment.
- the cell is a useful cell such as a mammalian cell.
- a cell if a cell product is used as a result of culture, a cell that easily produces the substance or a cell into which a specific gene has been introduced can be selected so as to easily produce the target substance.
- a cell if a specific cell is used as a result of culture, a cell in which a gene is modified so that the cell can be easily proliferated can be used.
- the cells mature cells and undifferentiated cells can be used without any restriction on the maturity. Therefore, cells collected by enzyme treatment from biological tissues, blood-derived cells, mesenchymal stem cells, ES (Embryonic stem) cells, iPS (induced pluripotent stem) cells, and cells induced to differentiate from these cells Etc. are exemplified. Moreover, it is not limited to an adhesion cell and a floating cell, and the method of culture
- the suspension culture includes suspension culture of a single cell, suspension culture of a cell condensate, suspension culture with cells supported on a microcarrier, and the like. Furthermore, the cell is not limited to a single type of cell. It can also be used to mix and co-cultivate other cells that produce substances in which the target cells are easy to grow.
- the cell culture system 1 includes a component adjustment liquid tank 3, a cell culture device 5, and a liquid feeding circuit 7.
- the component adjustment liquid tank 3 and the cell culture device 5 are connected by a liquid feeding circuit 7.
- the liquid feeding circuit 7 feeds a culture liquid described later between the component adjustment liquid tank 3 and the cell culture device 5.
- the liquid feeding circuit 7 includes two tubes 8 and 9 and liquid feeding pumps 10 and 11.
- the tubes 8 and 9 have a hollow structure, and can send the culture solution aseptically.
- the tubes 8 and 9 are made of a material such as silicon, urethane, fluororesin, or polyvinyl chloride, for example.
- the liquid feeding pumps 10 and 11 are provided on the liquid feeding paths of the tubes 8 and 9, respectively, and are pumps capable of continuously feeding the culture solution.
- the liquid feed pumps 10 and 11 may be general pumps, and examples thereof include a peristaltic pump and a diaphragm pump.
- the liquid feeding circuit 7 feeds the culture liquid via the tubes 8 and 9 between the component adjustment liquid tank 3 and the cell culture device 5 by driving the liquid feeding pumps 10 and 11.
- the culture fluid component adjustment film 13 is provided on the tubes 8 and 9 of the liquid feeding circuit 7. Specifically, the culture solution component adjustment film 13 is connected to one end portion of the tube 8 and one end portion of the tube 9, and is disposed in the component adjustment solution tank 3.
- the culture fluid component adjustment membrane 13 is a semipermeable membrane in which the membrane permeability of the culture fluid component depends on its molecular weight.
- the pore diameter of the culture solution component adjustment membrane 13 is designed according to the molecular weight of the component to be retained in the cell culture device 5. That is, the culture fluid component adjustment membrane 13 is selected so that the minimum molecular weight substance does not permeate the membrane among the components to be held in the cell culture device 5.
- a flat membrane shape or a hollow fiber shape can be used, but for the purpose of conveying the culture solution, a hollow fiber shape is preferable. In order to efficiently adjust the components, it is more preferable to use a plurality of hollow fibers in a bundle.
- a hollow fiber-shaped culture solution component adjustment membrane 13 is illustrated.
- the material of the culture fluid component adjustment film 13 is not particularly limited, but is preferably a material that does not adsorb, decompose, or the like the component that is desired to be retained in the cell culture device 5.
- the material of the culture fluid component adjustment film 13 has the characteristic of easily adsorbing the above components, the surface is modified by coating them with another material or using a surface modifier. Thus, it is possible to suppress the adsorption of components.
- the component adjustment liquid tank 3 is a tank for storing the component adjustment liquid.
- the component adjustment liquid tank 3 is formed of a material that is inert to the component adjustment liquid component, has no cytotoxicity, and is resistant to sterilization (including decontamination, sterilization, or sterilization) processing.
- sterilization including decontamination, sterilization, or sterilization
- glass, synthetic resin, stainless steel and the like can be mentioned.
- the internal volume and shape of the component adjustment liquid tank 3 are appropriately determined according to the amount of the component adjustment liquid.
- the component adjustment liquid tank 3 is made of glass, for example, and has a bottomed cylindrical shape.
- the component adjustment liquid tank 3 is provided with a lid portion 3c that closes an opening (not shown) provided in the upper portion.
- the component adjustment liquid accommodated in the component adjustment liquid tank 3 is a solution having at least one of the components that can substantially permeate the culture solution component adjustment film 13.
- the components contained in each of the culture solution and the component adjustment solution are adjusted via the membrane by the molecular weight and the concentration difference between the two solutions.
- the component whose molecular weight is larger than the pore size of the culture solution component adjustment membrane 13 and cannot substantially permeate the membrane does not move between the two solutions.
- the concentration of the component whose molecular weight is smaller than the pore size of the culture solution component adjustment membrane 13 and can substantially permeate the membrane is adjusted between the two solutions so that the concentration difference is reduced. Metabolites produced by the cells and accumulated in the culture solution move to the component adjustment solution side to reduce the concentration in the culture solution. At the same time, components that are necessary for cell growth and have a reduced concentration during the culture period are transferred from the component adjustment solution to the culture solution and supplemented.
- a component adjustment liquid has all the components lost from a culture solution during a cell culture period. More preferably, the concentration of these components is set so that they are not depleted during the culture period.
- the component adjustment liquid may be designed so as to have a buffering capacity so as to easily maintain a physiological pH, or a pH indicator dye may be mixed so that a change in pH can be easily distinguished by color.
- a stirring rotor 4 is provided inside the component adjustment liquid tank 3.
- the stirring rotor 4 is a member that stirs the component adjustment liquid in the component adjustment liquid tank 3, and is driven by a driving source (not shown) disposed at the lower part of the component adjustment liquid tank 3.
- the drive source is for rotating a magnetic body, for example.
- the stirring rotor 4 rotates in accordance with the rotational drive of the magnetic body, and stirs the component adjustment liquid.
- the lid portion 3c of the component adjustment liquid tank 3 may be provided with an air supply / exhaust port 6 and a sampling port (not shown) for sampling the component adjustment liquid.
- the cell culture device 5 is a device for culturing cells.
- FIG. 2 is a perspective view showing the cell culture device.
- FIG. 3 is a side view of the cell culture device.
- FIG. 4 is a diagram showing a cross-sectional configuration along the line IV-IV in FIG.
- the cell culture device 5 includes a culture tank 15, a shaft member 17, a stirring mechanism (stirring means) 19, and a filter 21.
- the culture tank 15 stores (stores) a culture solution in which cells are cultured.
- the culture solution is a solution having at least various cells and the like, solution components capable of growing the cells, and the environment.
- the composition and concentration of the culture solution are designed according to the nature of the cells.
- the culture solution may be designed to have a buffer capacity so that a physiological pH can be easily maintained, or a pH indicator dye may be mixed so that a change in pH can be easily distinguished by color.
- various commercially available culture solutions may be used as they are, and additional components may be added to them depending on the properties of the target cells.
- the culture tank 15 is preferably formed of a material that is inert to the culture solution components, has no cytotoxicity, and is resistant to sterilization treatment, such as glass, synthetic resin, stainless steel, and the like. Is mentioned.
- the content and shape of the culture tank 15 are appropriately determined according to the amount of the culture solution.
- the culture tank 15 is made of glass, for example, and has a bottomed cylindrical shape.
- the culture tank 15 has an extraction part 16 for extracting a culture solution containing cells and the like.
- the extraction part 16 is provided in the side part 15a (refer FIG. 4) of the culture tank 15, and is a cylindrical body extended diagonally upward.
- a lid portion 16 c is attached to the extraction portion 16.
- the culture tank 15 is provided with a lid 15c that closes an opening 15o provided at the top.
- the lid 15c is provided with an air supply / exhaust port 12, a culture solution supply unit for supplying the culture solution to the culture tank 15, an insertion port for a pH sensor, and the like.
- the other end of the tube 9 is connected to the upper end of the culture solution supply unit.
- the shaft member 17 is a linear member and has a hollow structure.
- the shaft member 17 is preferably a material that is inert to the culture fluid components, has no cytotoxicity, and is resistant to sterilization treatment. Examples thereof include synthetic resins and stainless steel.
- the shaft member 17 has openings 17a and 17b at both ends.
- One end of the shaft member 17 is disposed in the culture tank 15. Specifically, the shaft member 17 is fixed to the shaft support portion 23.
- the shaft support portion 23 is provided on the lid portion 15c.
- the shaft support portion 23 is disposed substantially at the center of the lid portion 15c and is erected on the lid portion 15c.
- the shaft support portion 23 has a hollow structure, and the shaft member 17 is inserted therein to hold the shaft member 17 so as not to rotate.
- the other end portion of the shaft member 17 protrudes from the upper end surface of the shaft support portion 23.
- the other end of the tube 8 is connected to the upper end of the shaft member 17. Thereby, the inside of the shaft member 17 communicates with the tube 8.
- the stirring mechanism 19 includes a mounting portion 25 and a stirring blade 27.
- the attachment portion 25 is rotatably attached to the shaft member 17.
- the attachment portion 25 is inserted through the shaft member 17 and is rotatably supported at a predetermined height position of the shaft member 17.
- the stirring blade 27 stirs the culture solution.
- the stirring blade 27 is rotatably provided with the shaft member 17 as a rotation center.
- the attachment portion 25 is connected to the upper end portion of the stirring blade 27, and the attachment portion 25 is rotatable to the shaft member 17, so that the stirring blade 27 rotates about the shaft member 17.
- the stirring blade 27 is preferably formed of a plate material that is inactive and resistant to the culture solution, and examples thereof include a thin plate-like synthetic resin, stainless steel (for example, SUS316 having a thickness of 1 mm), and the like.
- the number of the stirring blades 27 is set by the number of rotations of the stirring mechanism 19, but it is preferable to equip the shaft member 17 at equal intervals from the viewpoint of balance during stirring, and for example, 2 to 4 blades are preferable. In the present embodiment, a configuration with two stirring blades 27 is illustrated.
- the stirring blade 27 is formed so that a gap with the inner surface of the bottom 15b (see FIG. 4) of the culture tank 15 is small. Therefore, the stirring blade 27 follows the inner surface of the bottom portion 15b when the stirring mechanism 19 rotates. Thereby, the culture solution in the vicinity of the inner surface of the bottom portion 15b is agitated to continuously float cells and cell aggregates in the culture solution, so that precipitation on the inner surface of the bottom portion 15b can be prevented. Further, the stirring blade 27 is formed so that a gap between the inner surface of the side surface portion 15a of the culture tank 15 is small. Therefore, the stirring blade 27 follows the inner surface of the side surface portion 15a when the stirring mechanism 19 rotates. Thereby, the culture solution in the vicinity of the inner surface of the side surface portion 15a can be agitated to form a uniform laminar flow, and cell aggregates and the like having an increased specific gravity with cell proliferation can be prevented from being precipitated.
- the magnetic stirring member 27 is provided with a magnetic body 30.
- the magnetic body 30 is disposed at the lower end of the stirring blade 27.
- the magnetic body 30 is a permanent magnet or the like covered with tetrafluoroethylene or the like.
- the magnetic body 30 is fixed to a portion that is bent so as to surround the magnetic body 30 at the lower end of the stirring blade 27.
- the stirring blade 27 rotates by driving the magnetic body 30.
- a drive motor 34 that rotates a pair of magnetic bodies 32 through a support 33 is disposed below the culture tank 15, and faces the magnetic body 30. With the rotation of the magnetic body 32 arranged, the stirring blade 27 rotates.
- the shaft of the drive motor 34 is disposed so as to be coaxial with the shaft member 17.
- the filter 21 is a part in contact with the culture solution, and allows the culture solution to permeate, but does not allow the cells and cell aggregates in the culture solution to permeate.
- the filter 21 only needs to be capable of separating cells and the culture medium, and the material, shape, number, and the like are not particularly limited and may be appropriately set according to the design.
- the filter 21 is a porous body. Preferably, it is a sintered body and has a cylindrical shape.
- the material of the filter 21 include metal, ceramic, glass, resin, fiber, and the like, and preferably a fluororesin and a polyolefin resin.
- the filter 21 is preferably made of a material that permeates water to some extent, does not adsorb the cells themselves or the microcarriers, and does not decompose or adsorb components that are desired to be retained in the cell culture apparatus 5. If it has the characteristics, it can be made hydrophilic by coating with another material or by using a surface modifier, and the above adsorption and decomposition can be prevented.
- the filter 21 is provided in contact with the shaft member 17. Specifically, the filter 21 has a bottomed cylindrical shape, and the lower end portion of the shaft member 17 is inserted therein. Accordingly, the filter 21 extends coaxially with the shaft member 17 and is positioned between the stirring blades 27 of the stirring mechanism 19.
- the filter 21 is located inside the movable region of the stirring blade 27 that rotates about the shaft member 17 as a rotation center, and is provided on the shaft member 17 independently of the stirring blade 27.
- the culture solution that has passed through the filter 21 is led into the shaft member 17.
- the culture solution sucked through the filter 21 is introduced into the inside through the opening 17 b of the shaft member 17, led out from the opening 17 a, and led out to the tube 8. Then, the culture solution is sent to the culture solution component adjustment film 13 in the component adjustment solution tank 3 through the tube 8 and returned to the culture vessel 15 through the tube 9.
- the filter 21 is provided on the shaft member 17 that cannot be rotated.
- the stirring blade 27 of the stirring mechanism 19 is provided to be rotatable about the shaft member 17 as a rotation center.
- the stirring blade 27 rotates with respect to the shaft member 17, and the shaft member 17 and the filter 21 do not rotate. Therefore, in the cell culture apparatus 5, since the mechanism for sucking the culture solution is not rotated, the configuration can be simplified.
- the filter 21 that sucks the culture solution from the culture tank 15 is provided on the shaft member 17 that is the rotation center of the stirring blade 27 so as to be located inside the movable region of the stirring blade 27.
- the cell culture device 5 can favorably culture cells while realizing a simple configuration.
- the shaft member 17 is supported by the shaft support portion 23 provided in the lid portion 15c, and the lower end portion of the shaft member 17 is inserted into the filter 21.
- the device since the mechanism for sucking the culture solution is concentrated on the shaft member 17, and the shaft member 17 does not rotate, the device can be simplified.
- the filter 21 since the filter 21 has a columnar shape, a film area can be secured in the filter 21. Therefore, the filter 21 can stably suction the culture solution.
- the structure of the cell culture apparatus 5 which concerns on 1st Embodiment should just be a structure by which a shaft member is supported by the cover part 15c of the culture tank 15, and the structure of a shaft member, a filter, and a stirring mechanism is another form. There may be.
- FIG. 6 is a diagram showing a modification of the cell culture device according to the first embodiment.
- the filter 21A may be inserted through the shaft member 17A.
- the shaft member 17A has a hollow structure, has an opening 17Aa at the upper end, and is closed at the lower end.
- An opening 17h that communicates the inside and the outside is provided on the side surface of the shaft member 17A.
- only one opening 17h is shown, but the number, size, and shape of the opening 17h may be appropriately set according to the design.
- the filter 21A has a cylindrical shape.
- the filter 21A is inserted through the shaft member 17A, and is provided on the outer surface (outside) of the shaft member 17A so as to cover the opening 17h of the shaft member 17A. Thereby, the culture solution is sucked from the culture tank 15 through the inside of the filter 21A and the shaft member 17A.
- the filter 21 may have a shape other than the cylindrical shape. As shown in FIG. 6B, the lower end of the filter 21B may have a truncated cone shape. Further, the filter 21 may have a prismatic shape or a triangular prism shape. The filter 21 may have an uneven surface shape in order to ensure a surface area.
- the filter 21 may be in contact with the bottom 15b of the culture tank 15.
- the vicinity of the center of the bottom is occupied by the filter 21. Thereby, there is no room for stagnation of the liquid flow in the vicinity of the bottom center due to the rotation of the culture solution, and precipitation near the bottom center of cell aggregates and the like whose specific gravity increases with cell proliferation can be prevented.
- the cell culture system 1A includes a cell culture device 5, a culture solution tank 3A, and a waste tank 3B.
- the culture solution tank 3A and the cell culture device 5 are connected by a tube 8 provided with a liquid feed pump 10.
- the cell culture device 5 and the disposal tank 3B are connected by a tube 9 provided with a liquid feed pump 11.
- the culture solution is supplied from the culture solution tank 3A to the cell culture device 5, and the culture solution containing metabolites and the like is supplied from the cell culture device 5 to the waste tank 3B.
- the cell culture system 1B includes a cell culture device 5, a culture solution tank 3A, and a waste tank 3B.
- the culture solution tank 3A, the waste tank 3B, and the cell culture device 5 are connected by a liquid supply circuit 7A.
- a three-way cock 14 is provided on the tube 8A.
- the cell culture device 5 is supplied with the culture solution from the culture solution tank 3A via the three-way stopcock 14, and from the cell culture device 5 the culture solution containing metabolites and the like is supplied to the waste tank 3B via the three-way stopcock 14. Supplied.
- the flow path of the three-way stopcock 14 is switched according to the supply of the culture solution to the cell culture device 5 and the suction of the culture solution from the cell culture device 5. That is, the three-way stopcock 14 establishes a flow path between the culture solution tank 3A and the cell culture device 5 when the culture solution is supplied from the culture solution tank 3A, and the culture solution is supplied to the waste tank 3B. In the case of performing, the flow path between the cell culture device 5 and the waste tank 3B is established. In the cell culture device 5, the filter 21 sucks the culture solution from the culture vessel 15 and supplies the culture solution to the culture vessel 15 in the filter 21.
- FIG. 9 is a diagram showing a cross-sectional configuration of the cell culture device according to the second embodiment.
- the cell culture device 40 includes a culture tank 42, a shaft member 44, a stirring mechanism 46, and a filter 48.
- the culture tank 42 is preferably formed of a material that is inactive to the culture solution components, has no cytotoxicity, and is resistant to sterilization (including decontamination, sterilization, or aseptic) treatment. Examples thereof include glass, synthetic resin, and stainless steel.
- the internal volume and shape of the culture tank 42 are appropriately determined according to the amount of the culture solution.
- the culture tank 42 is made of, for example, a synthetic resin and has a bottomed cylindrical shape.
- the culture tank 42 is provided with a lid 42c that closes an opening 42o provided in the upper part.
- the lid part 42c is provided with an extraction part 43 for taking out a culture solution containing cells and the like, an air supply / exhaust port, a pH sensor 58, and the like.
- the shaft member 44 is supported by the bottom 42a of the culture tank 42.
- the shaft member 44 includes a conduit portion 44a and a support portion 44b.
- the conduit portion 44a is a linear member and has a hollow structure.
- the conduit portion 44a is preferably a material that is inert to the culture solution components, has no cytotoxicity, and is resistant to sterilization treatment. Examples thereof include synthetic resins and stainless steel.
- the conduit portion 44 a is supported by the bottom portion 42 a of the culture tank 42. Specifically, the conduit portion 44a is inserted into and supported by a support base 42d provided on the bottom portion 42a.
- the inside of the conduit portion 44a communicates with a suction port 42e provided on the bottom portion 42a of the culture tank 42.
- An opening 44h that communicates the inside and the outside is provided in the side wall of the conduit portion 44a. Although only one opening 44h is shown in FIG. 9, the number, size, and shape of the opening 44h may be set as appropriate according to the design.
- the support part 44b is provided in the upper part of the conduit part 44a.
- the support portion 44b is disposed so as to close the opening at the upper end portion of the conduit portion 44a.
- the support portion 44b extends coaxially with the conduit portion 44a.
- the stirring mechanism 46 includes a mounting portion 50 and a stirring blade 52.
- the attachment portion 50 is rotatably attached to the support portion 44b of the shaft member 44. Specifically, the attachment portion 50 has the upper end portion of the support portion 44b inserted therein.
- the stirring blade 52 is provided to be rotatable about the shaft member 44 as a rotation center.
- the mounting portion 50 is connected to the upper end portion of the stirring blade 52, and the mounting portion 50 is rotatable about the shaft member 44, so that the stirring blade 52 rotates about the shaft member 44 as a rotation center.
- the stirring blade 52 is preferably formed of a plate material that is inert to the culture medium and has resistance, and examples thereof include a thin plate-shaped synthetic resin, stainless steel (for example, SUS316 having a thickness of 1 mm), and the like.
- the number of the stirring blades 52 is set by the number of rotations of the stirring mechanism 46, but it is preferable to equip the shaft member 44 at equal intervals from the viewpoint of balance during stirring, and for example, 2 to 4 blades are preferable. In this embodiment, the structure with two stirring blades 52 is illustrated.
- the stirring blade 52 is provided with a magnetic body 54.
- the magnetic body 54 is disposed at the lower end of the stirring blade 52.
- the magnetic body 54 is a permanent magnet or the like covered with tetrafluoroethylene or the like.
- the magnetic body 54 is fixed to a portion that is bent so as to surround the magnetic body 54 at the lower end of the stirring blade 52.
- the stirring blade 52 rotates by driving the magnetic body 54.
- a drive motor 34 that rotationally drives a pair of magnetic bodies 32 via a support 33 is disposed below the culture tank 42 and faces the magnetic body 54. With the rotation of the magnetic body 32 arranged, the stirring blade 52 rotates.
- the shaft of the drive motor 34 is arranged so as to be coaxial with the shaft member 44.
- the filter 48 only needs to be capable of separating cells and the culture medium, and the material, shape, number, etc. are not particularly limited, and may be appropriately set according to the design.
- the filter 48 is a porous body, Preferably, it is a sintered body and has a cylindrical shape.
- the filter 48 is inserted into the conduit portion 44a of the shaft member 44, and is provided on the outer surface (outside) of the conduit portion 44a so as to cover the opening 44h of the conduit portion 44a. That is, the filter 48 is located inside the movable region of the stirring blade 52 that rotates about the shaft member 44 and is provided on the shaft member 44 independently of the stirring blade 52.
- the culture solution is sucked from the culture tank 42 through the filter 48 and the inside of the conduit portion 44a.
- the filter 48 is provided on the shaft member 44 that cannot be rotated.
- the stirring blade 52 of the stirring mechanism 46 is provided to be rotatable about the shaft member 44 as a rotation center.
- the stirring blade 52 rotates with respect to the shaft member 44, and the shaft member 44 and the filter 48 do not rotate. Therefore, in the cell culture device 40, since the mechanism for sucking the culture solution is not rotated, the configuration can be simplified.
- a filter 48 that sucks the culture solution from the culture tank 42 is provided on the shaft member 44 that is the rotation center of the stirring blade 52 so as to be located inside the movable region of the stirring blade 52.
- the culture solution is sucked from the culture tank 42 through the filter 48 and the shaft member 44. Therefore, in the cell culture device 40, the filter 48 is prevented from being disturbed by the liquid flow (laminar flow) generated by the rotation of the stirring blade 52, and the stress on the cells is reduced with respect to the suction of the culture liquid. be able to. Therefore, in the cell culture device 40, cell culture can be favorably performed while realizing a simple configuration.
- the shaft member 44 is supported by the bottom 42 a of the culture tank 42, and the shaft member 44 is inserted into the filter 48.
- the mechanism for sucking the culture solution is concentrated on the shaft member 44, and the shaft member 44 does not rotate, so that the device can be simplified.
- the configuration of the cell culture device 40 according to the second embodiment may be any configuration as long as the shaft member is supported on the bottom 42a of the culture tank 42, and the configurations of the shaft member, the filter, and the stirring mechanism are other forms. May be.
- FIG. 10 to FIG. 14 are diagrams showing modifications of the cell culture device of the second embodiment.
- the shaft member 60 includes a conduit portion 60a and a support portion 60b.
- the conduit portion 60a is a linear member and has a hollow structure.
- the conduit portion 60 a is inserted into a support base 42 d provided on the bottom portion 42 a of the culture tank 42 and supported by the bottom portion 42 a of the culture tank 42.
- An opening 60h is provided at the upper end of the conduit 60a.
- the filter 62 is provided in the conduit portion 60a so as to cover the opening 60h of the conduit portion 60a.
- the filter 62 has a bottomed cylindrical shape, and the upper end portion of the conduit portion 60a is inserted therein.
- the conduit portion 60a is different in configuration from the conduit portion 44a of the above-described embodiment, and does not penetrate through the inside of the filter 62.
- the support portion 60 b is provided at the upper end portion of the filter 62.
- the support portion 60 b extends coaxially with the conduit portion 60 a and the filter 62.
- the attaching part 50 of the stirring mechanism 46 is attached to the support part 60b.
- the shaft member 70 is supported on the bottom 42 a of the culture tank 42.
- An opening 70 h is provided at the upper end of the shaft member 70.
- the filter 71 is provided on the shaft member 70 so as to cover the opening 70 h of the shaft member 70.
- the filter 71 has a bottomed cylindrical shape, and the upper end portion of the shaft member 70 is inserted therein.
- the stirring mechanism 72 includes a mounting portion 74 and a stirring blade 76.
- the attachment portion 74 is rotatably attached to the shaft member 70.
- the attachment portion 74 is attached to the shaft member 70 at a position below the lower end portion of the filter 71.
- the lower end side of the stirring blade 76 is connected to the mounting portion 74 and is disposed with the filter 71 interposed therebetween.
- the stirring blade 76 is provided with a magnetic body 78.
- the magnetic body 78 is disposed at the lower end of the stirring blade 76.
- the magnetic body 78 is a permanent magnet or the like covered with tetrafluoroethylene or the like.
- the stirring blade 76 is rotated by driving the magnetic body 78.
- a drive motor 34 that rotationally drives a pair of magnetic bodies 32 via a support 33 is disposed below the culture tank 42 and faces the magnetic body 78.
- the stirring blade 76 rotates with the rotation of the magnetic body 32 arranged.
- the shaft of the drive motor 34 is disposed so as to be coaxial with the shaft member 70.
- the structure of the stirring blade 76 is not limited to the structure (shape) shown in FIG.
- the shaft member 80 includes a conduit portion 80a and a sealing portion 80b.
- the conduit portion 80a is a linear member and has a hollow structure.
- the conduit portion 80 a is inserted into a support base 42 d provided on the bottom portion 42 a of the culture tank 42 and supported by the bottom portion 42 a of the culture tank 42.
- Openings 81a and 81b that communicate the inside and the outside are provided in the side wall of the conduit portion 80a.
- the openings 81a and 81b are spaced apart from each other in the longitudinal direction of the shaft member 80, and are disposed corresponding to positions of a first filter 82a and a second filter 82b, which will be described later.
- each of the openings 81a and 81b is shown one by one, but the number, size, and shape of the openings 81a and 81b may be appropriately set according to the design.
- the sealing portion 80b seals (closes) the opening provided at the upper end portion of the conduit portion 80a.
- the filter 82 includes a first filter 82a and a second filter 82b. That is, the filter 82 is divided into two parts.
- the first filter 82a and the second filter 82b have a cylindrical shape.
- the 1st filter 82a is penetrated by the lower end part side of the conduit
- the 2nd filter 82b is penetrated by the upper end part side of the conduit
- the upper end portion of the first filter 82a and the lower end portion of the second filter 82b are separated from each other with a predetermined interval.
- the attachment portion 74 is disposed between the first filter 82a and the second filter 82b, and is rotatably attached to the conduit portion 80a (shaft member 80).
- the stirring blade 76 is connected to the mounting portion 74 and is disposed with the filter 82 interposed therebetween.
- the inner side of the lower end part of the stirring blade 76 shown in FIG. 12 has a shape along the shape of the support base 42d.
- the shaft member 90 is a linear member and has a hollow structure.
- the shaft member 90 is inserted into a support base 42d provided on the bottom 42a of the culture tank 42 and supported by the bottom 42a of the culture tank 42.
- the shaft member 90 is provided with an opening 90a at the upper end thereof, and an opening 90b that connects the inside and the outside is provided on the lower end of the side wall.
- the filter 92 includes a first filter 92a and a second filter 92b.
- the first filter 92a has a cylindrical shape.
- the 1st filter 92a is penetrated by the lower end part side of the shaft member 90, and is provided in the outer surface (outer side) of the shaft member 90 so that the opening part 90b may be covered.
- the second filter 92 b is provided on the shaft member 90 so as to cover the opening 90 a of the shaft member 90.
- the second filter 92b has a bottomed cylindrical shape, and the upper end portion of the shaft member 90 is inserted therein.
- the upper end of the first filter 92a and the lower end of the second filter 92b are spaced apart from each other by a predetermined distance.
- one opening 90b is shown in FIG. 13, the number, size, and shape of the opening 90b may be set as appropriate according to the design.
- the attachment portion 74 is disposed between the first filter 92a and the second filter 92b and is rotatably attached to the shaft member 90.
- the stirring blade 76 is connected to the mounting portion 74 and is disposed with the filter 92 interposed therebetween.
- the inner side of the lower end part of the stirring blade 76 shown in FIG. 13 has a shape along the shape of the support base 42d.
- the shaft member 100 has a first conduit portion 110 and a second conduit portion 120.
- pipe part 120 are linear members, and have a hollow structure.
- the first conduit part 110 is inserted into a support base 42d provided on the bottom part 42a of the culture tank 42 and supported by the bottom part 42a of the culture tank 42.
- An opening 110 a is provided at the upper end of the first conduit portion 110.
- the second conduit 120 is provided with an opening 120a and an opening 120b at the lower end and the upper end, respectively.
- the filter 130 includes a first filter 130a and a second filter 130b.
- the first filter 130 a is provided in the first conduit portion 110 and the second conduit portion 120 so as to cover the opening portion 110 a of the first conduit portion 110 and the opening portion 120 a of the second conduit portion 120.
- the first filter 130a has a cylindrical shape with insertion holes provided at both ends, and the upper end portion of the first conduit portion 110 and the lower end portion of the second conduit portion 120 serve as insertion holes.
- the 2nd filter 130b is provided in the 2nd conduit
- the second filter 130b has a bottomed cylindrical shape, and the upper end portion of the second conduit portion 120 is inserted therein.
- the 1st filter 130a and the 2nd filter 130b are connected by the 2nd conduit
- the attachment portion 74 is disposed between the first filter 130a and the second filter 130b, and is rotatably attached to the second conduit portion 120.
- the stirring blade 76 is connected to the mounting portion 74 and is disposed with the filter 130 interposed therebetween.
- the inner side of the lower end part of the stirring blade 76 shown in FIG. 14 is made into the shape along the shape of the support stand 42d.
- the stirring blades 27, 52, and 76 have been described as an example, but the shape of the stirring blade is not limited thereto.
- the shape of the stirring blade is preferably a configuration that can reduce the stress on the cells.
- Example 1 Control device for cell culture system
- an 8-linked animal culture apparatus BioJr. 8 BJR-25NA1S-8C, Able Co., Ltd.
- This control device can control eight 100 mL capacity cell culture devices with one unit.
- the measurement and control items were stirring speed, temperature, pH, and dissolved oxygen concentration (DO).
- DO dissolved oxygen concentration
- Human iPS cells (253G1) were used as cultured cells. The cells were seeded in a culture dish (Corning) coated with vitronectin (Life Technologies), and cultured using Essential-8 as a culture solution. The culture medium was changed every day, and subculture was performed once every 3 to 4 days.
- Example 1 (Culture of human iPS cells)
- the cell culture apparatus shown in FIG. 15 was produced.
- a glass-made dedicated tank (Able Co., Ltd.) was used as the culture tank 15, and the culture solution was 100 mL.
- the prepared human iPS cells were seeded at 2 ⁇ 10 7 cells (density 2 ⁇ 10 5 cells / mL), and culture was started. This time point was regarded as the 0th culture day.
- As a culture solution the following components were added to Essential-8 medium (Life Technologies) and used.
- Y-27632 (Wako Pure Chemical Industries, Ltd.) was added as a ROCK (Rho-associated coiled-coil forming kinase / Rho-binding kinase) inhibitor at a concentration of 10 ⁇ M and heparin (Sigma Aldrich) at a concentration of 750 ng / mL. .
- the culture vessel 15 was provided with a stirring blade 22 and the rotation speed was 60 rpm.
- the culture tank 15 was provided with a sensor (Able Co., Ltd.) capable of measuring temperature, pH, and dissolved oxygen concentration.
- the dissolved oxygen concentration was set to be controlled to 40%, and for this purpose, a gas introduction line was installed so that a mixed gas of oxygen, nitrogen, and air would be vented to the culture medium in the culture tank 15 . Furthermore, an outlet line for exhausting gas from the culture tank 15 was installed. The temperature was set at 37 ° C.
- a stainless steel hollow pipe (outer diameter 3 mm, inner diameter 1.8 mm) was used.
- a bottomed cylindrical filter made of a polyethylene sintered body having a diameter of 8 mm, a length of 15 mm, and an average pore diameter of 30 ⁇ m was used.
- the shaft member 17 is fixed to the center of the lid portion of the culture tank 15, and the culture solution that has passed through the filter 21 can be taken out from the culture tank 15 through the hollow portion of the shaft member 17.
- a mouth capable of returning the culture solution was provided in the culture tank 15.
- the stirring blade 22 was installed so as to be rotatable around the shaft member 17.
- the filter 21 was installed at a height at which the upper surface of the cylinder and the liquid level of the culture solution were close.
- the component adjustment liquid tank used was a 1 L glass sterilization bottle. An aeration line, an inlet for the culture solution, and an outlet line were installed in the lid portion of the component adjustment solution tank. In the component adjustment liquid tank, urethane bonding is performed so that the hollow structure of both ends of the hollow fiber is released so that 400 hollow fibers of Asahi Polysulfone Dialyzer APS (Asahi Kasei Medical Co., Ltd.) are bundled to have an effective length of 20 cm. What was fixed with the agent was installed as a culture solution component adjustment membrane. The hollow fiber bundle was disposed inside the component adjustment liquid tank, and both ends of the hollow fiber bundle were connected to the culture solution inlet and outlet lines by a circuit. As the component adjustment solution, 1 L of a solution obtained by adding Y-27632 and heparin to Essential-6 (Life Technologies) to the same concentration as the culture solution was used.
- a silicon tube (inner diameter 1 mm ⁇ , outer diameter 4 mm ⁇ ) was used.
- Two Perista Pumps RP-23 (Able Co., Ltd.) were used as the culture solution feeding pump. Two pumps were connected to each of the liquid feeding circuits that connect the culture tank 15 and the component adjustment liquid tank, and were installed in a state capable of liquid feeding.
- bFGF (Life Technologies) is 10 ⁇ g / mL and heparin (Sigma Aldrich) is 250 ⁇ g / mL in a 10 mL syringe (Terumo Corporation). 2 mL was dissolved in the culture solution DMEM / F12 (Life Technologies).
- the cell culture system shown in FIG. 1 was produced by the method described above. Using this system, a cell mass composed of iPS cells was produced by the following method.
- Circulation of the culture broth by the feed pump was started from the first day of culture.
- the circulation rate was 100 mL / day for the first day, 200 mL / day for the second day, 400 mL / day for the third day, and 600 mL / day for the fourth and subsequent days.
- the flow rates of the two pumps were finely adjusted so that the liquid volume in the culture tank 15 could be maintained at substantially the same level, and the culture was performed while continuously perfusing the culture liquid up to the sixth day.
- 1 mL of a mixed solution of bFGF and heparin was administered from a 10 mL syringe on the second and fourth days of culture.
- the cell culture was terminated, and the number of cells and the undifferentiated rate were measured as follows.
- Undifferentiation rate measurement In order to confirm that human iPS cells maintain an undifferentiated state, the positive rate of SSEA-4, which is an undifferentiated marker, was measured by a flow cytometry method. Anti-human / mouse SSEA-4 monoclonal antibody FAB1435F (R & D Systems) was used as the antibody, and Cell Lab QuantaSC (Beckman Coulter, Inc.) was used as the measurement apparatus. The positive rate of SSEA-4 was defined as the undifferentiated rate.
- Example 2 In Example 2, as shown in FIG. 16, the filter 21 has the same structure as the cell culture apparatus of Example 1 except that the installation height of the filter 21 is set between the bottom surface of the culture tank 15 and the liquid level. did.
- Example 1 In Comparative Example 1, as shown in FIG. 17, except that the installation of the filter 21 and the shaft member 17 is outside the rotation range of the stirring blade 22, and the inlet line and outlet line of the culture solution are changed, Example 1 The same structure as that of the cell culture apparatus.
- Example 1 The culture results of Example 1, Example 2, and Comparative Example 1 are shown in Table 1 below.
- Example 1 As shown in Table 1, in the cell culture device of Comparative Example 1, cell proliferation was not observed, whereas in the cell culture devices of Example 1 and Example 2, compared with the time of the start of culture. More than 20 times proliferation was realized. Moreover, in the cell culture apparatuses of Example 1 and Example 2, the ratio of SSEA-4 positive undifferentiated cells remained maintained at a high undifferentiation rate of 95% or more. From this, it was shown that the method of this embodiment is effective as a cell culture apparatus for human pluripotent stem cells.
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Abstract
Description
図1は、第1実施形態に係る細胞培養装置を備えた細胞培養システムを示す図である。図1に示す細胞培養システム1では、細胞が培養される。細胞は、哺乳動物細胞等の有用細胞である。細胞としては、培養の結果、細胞の産生物を利用するのであれば、その物質を産生し易い細胞や目的の物質を産生し易いように、特定の遺伝子を導入した細胞も選択できる。また、細胞としては、培養の結果、特定の細胞を利用するのであれば、その細胞が増殖し易くなるように遺伝子を改変した細胞等も用いることができる。
続いて、第2実施形態について説明する。図9は、第2実施形態に係る細胞培養装置の断面構成を示す図である。図9に示されるように、細胞培養装置40は、培養槽42と、軸部材44と、撹拌機構46と、フィルタ48と、を備えている。
(細胞培養システムの制御装置)
細胞培養システムの制御装置としては、8連動動物培養装置BioJr.8(BJR-25NA1S-8C、エイブル株式会社)を使用した。本制御装置は、1台で8個の100mL容量の細胞培養装置を制御可能である。測定及び制御項目は、撹拌速度、温度、pH、及び溶存酸素濃度(DO)とした。本制御装置では、各細胞培養装置を独立して制御可能である。
培養細胞としては、ヒトiPS細胞(253G1)を用いた。細胞は、ビトロネクチン(ライフテクノロジーズ社)をコートした培養ディッシュ(コーニング社)に播種し、培養液としてEssential-8を用いて培養した。培養液の交換は毎日実施し、3~4日に一度の頻度で継代を実施した。
実施例1においては、図15に示される細胞培養装置を作製した。培養槽15としてガラス製の専用槽(エイブル株式会社)を使用し、培養液を100mLとした。準備したヒトiPS細胞を、細胞数2×107個(密度2×105個/mL)で播種し、培養を開始した。この時点を培養0日目とした。培養液としては、Essential-8培地(ライフテクノロジーズ社)に以下の成分を添加して使用した。すなわち、ROCK(Rho-associated coiled-coil forming kinase/Rho結合キナーゼ)阻害剤としてY-27632(和光純薬工業株式会社)を10μM、ヘパリン(シグマアルドリッチ社)を750ng/mLの濃度にて添加した。培養槽15には撹拌翼22を設置し、回転数は60rpmとした。培養槽15には、温度、pH、溶存酸素濃度をそれぞれ計測可能なセンサー(エイブル株式会社)を設置した。また、溶存酸素濃度は40%に制御される設定とし、そのために、酸素、窒素、及び空気の混合ガスが培養槽15内の培養液に対して上面通気となるようにガス導入ラインを設置した。さらに、ガスを培養槽15から排出する導出ラインを設置した。温度は37℃に設定した。
培養6日目に細胞塊を培養槽15から回収し、細胞分離/分散溶液Accumax(イノベーティブセルテクノロジーズ社)にて10分間処理し、単細胞の状態とした後、トリパンブルー法にて死細胞を染色して、生細胞のみを計算盤を用いてカウントした。
ヒトiPS細胞が未分化状態を維持していることを確認するために、未分化マーカーであるSSEA-4の陽性率をフローサイトメトリー法にて測定した。抗体としては、抗ヒト/マウスSSEA-4モノクローナル抗体FAB1435F(R&Dシステムズ社)を用い、測定装置としては、Cell Lab QuantaSC(ベックマン・コールター株式会社)を用いた。SSEA-4の陽性率を未分化率とした。
実施例2では、図16に示されるように、フィルタ21の設置高さを、培養槽15の底面と液面高さとの中間に設置した以外は、実施例1の細胞培養装置と同じ構造とした。
比較例1では、図17に示されるように、フィルタ21と軸部材17の設置を、撹拌翼22の回転範囲の外側とし、培養液の入口ライン及び出口ラインを変更した以外は、実施例1の細胞培養装置と同じ構造とした。
Claims (12)
- 細胞を含む培養液を収容する培養槽と、
前記培養槽内に少なくとも一部が配置された軸部材と、
前記軸部材に支持されて前記培養槽内に配置され、前記軸部材を回転中心として回転可能に設けられた撹拌翼を有する撹拌手段と、
前記軸部材に接するように設けられ、前記培養液は透過させるが、前記細胞は透過させないフィルタと、を備え、
前記軸部材は、少なくとも一部が中空であり、その内部に前記培養液を導入又は前記内部から前記培養液を導出する開口部が設けられていると共に、回転不能とされており、
前記フィルタは、前記軸部材を回転中心として回転する前記撹拌翼の可動領域よりも内側に位置し、前記撹拌翼とは独立して前記軸部材に設けられており、
前記フィルタ及び前記軸部材の前記内部を介して、前記培養槽から前記培養液の吸引及び/又は前記培養槽への前記培養液の供給を行う、細胞培養装置。 - 前記軸部材は、前記培養槽の底部に支持されている、請求項1記載の細胞培養装置。
- 前記軸部材は、下端部に前記開口部が設けられていると共に、上端部が閉塞されており、
前記軸部材の側面部には、前記内部と連通する開口部が設けられており、
前記フィルタは、前記側面部の前記開口部を覆うように前記軸部材の外表面に設けられている、請求項2記載の細胞培養装置。 - 前記フィルタは、筒状を成しており、前記側面部の前記開口部を覆うように前記軸部材の外側に挿通されている、請求項3記載の細胞培養装置。
- 前記軸部材は、下端部に前記開口部が設けられていると共に、上端部に前記内部と連通する開口部が設けられた筒状を成しており、
前記フィルタは、前記上端部の前記開口部を覆うように前記軸部材に設けられている、請求項2記載の細胞培養装置。 - 前記フィルタは、有底の筒状を成しており、前記上端部の前記開口部を覆うように前記軸部材の外側に挿通されている、請求項5記載の細胞培養装置。
- 前記軸部材は、前記培養槽の蓋部に支持されている、請求項1記載の細胞培養装置。
- 前記軸部材は、上端部に前記開口部が設けられていると共に、下端部に前記内部と連通する開口部が設けられた筒状を成しており、
前記フィルタは、前記下端部の前記開口部を覆うように前記軸部材に設けられている、請求項7記載の細胞培養装置。 - 前記フィルタは、有底の筒状を成しており、前記下端部の前記開口部を覆うように前記軸部材の外側に挿通されている、請求項8記載の細胞培養装置。
- 前記軸部材は、上端部に前記開口部が設けられていると共に、下端部が閉塞されており、
前記軸部材の側面部には、前記内部と連通する開口部が設けられており、
前記フィルタは、前記側面部の前記開口部を覆うように前記軸部材の外表面に設けられている、請求項7記載の細胞培養装置。 - 前記フィルタは、筒状を成しており、前記側面部の前記開口部を覆うように前記軸部材の外側に挿通されている、請求項10記載の細胞培養装置。
- 前記フィルタは、多孔質体である、請求項1~11のいずれか一項記載の細胞培養装置。
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JP6215362B2 (ja) | 2017-10-18 |
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KR101881238B1 (ko) | 2018-07-23 |
US20160355774A1 (en) | 2016-12-08 |
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