WO2012008368A1 - 細胞培養容器、および細胞培養装置 - Google Patents
細胞培養容器、および細胞培養装置 Download PDFInfo
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- WO2012008368A1 WO2012008368A1 PCT/JP2011/065626 JP2011065626W WO2012008368A1 WO 2012008368 A1 WO2012008368 A1 WO 2012008368A1 JP 2011065626 W JP2011065626 W JP 2011065626W WO 2012008368 A1 WO2012008368 A1 WO 2012008368A1
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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
- C12M37/00—Means for sterilizing, maintaining sterile conditions or avoiding chemical or biological contamination
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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
- C12M23/02—Form or structure of the vessel
- C12M23/10—Petri dish
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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
- C12M25/00—Means for supporting, enclosing or fixing the microorganisms, e.g. immunocoatings
- C12M25/02—Membranes; Filters
- C12M25/04—Membranes; Filters in combination with well or multiwell plates, i.e. culture inserts
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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
- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
- C12M29/10—Perfusion
Definitions
- the present invention relates to a cell culture container and a cell culture apparatus using the same.
- an apparatus for automating the cell culture process in a closed system has been developed. This is achieved by automating the cell culture process and reducing the risk of biological contamination by using a closed culture container that does not require the operation of opening and closing the lid of the culture container.
- feeder cells and cells that require vegetative cells
- Cell types such as ES (Embryonic® Stem) cells and iPS (Induced® Pluripotent® Stem) cells, and skin epithelial cells, corneal epithelial cells, and oral mucosal epithelial cells, which are attracting attention in regenerative medicine, often require feeder cells.
- cultured cells for treatment it is desirable to culture the feeder cells and the cells used for treatment in a separated state. That is, it is desirable to perform cell culture in a cell culture vessel having two culture layers.
- the closed-system cell culture apparatus that has been developed so far has been difficult to perform two-layer culture because the culture layer has an apparatus configuration corresponding to a single-layer cell culture container.
- Patent Documents 1 and 2 As a means for solving this problem, culture apparatuses as shown in Patent Documents 1 and 2 have been proposed. If it is such an apparatus structure, ES cell, iPS cell, skin epithelial cell, corneal epithelial cell, oral cavity will be used by using the cell culture container which has a two-layer culture layer as shown, for example in patent documents 3 and 4 Cell types such as mucosal epithelial cells can be automatically cultured in a closed system.
- JP 2006-149237 A JP 2008-271915 A JP 2008-271912 A JP 2008-271911 A
- the culture fluid supply means provided in the apparatus joint in Patent Literatures 1 and 2 is provided in the cell culture vessel.
- a method is described in which a culture solution is sent and discharged by connecting to an elastic member (see claim 1 of Patent Document 1 and claim 1 of Patent Document 2).
- the present invention has been made in view of the above problems, and an object of the present invention is to provide a cell culture container and a cell culture apparatus using the same that solve these problems.
- the cell culture container of the present invention that achieves the above object is a cell culture container that is attached to a cell culture apparatus and holds and cultures cells, a culture solution holding part that holds the culture solution, and a supply and discharge of the culture solution There is provided a cell culture container having a structure including a protrusion structure part for performing the above and a culture liquid flow path communicating from the protrusion structure part to the culture liquid holding part.
- a cell culture apparatus for culturing cells in a cell culture container, a culture stage for holding the cell culture container, a culture solution storage unit for storing the culture solution, and a waste solution storage unit for storing the waste solution
- a liquid supply tube for supplying the culture solution from the culture solution storage unit to the cell culture vessel, and a waste solution tube for collecting the waste solution from the cell culture vessel and sending the waste solution to the waste solution storage unit.
- a cell culture device configured to be connected at one end.
- the cell culture container according to the present invention enables automatic culture of cells in a completely closed system. By culturing in a completely closed system, invasion of particles containing microorganisms from outside the cell culture space can be suppressed, and cell culture can be performed safely and securely.
- HE hematoxylin-eosin
- HE hematoxylin-eosin
- staining image of the corneal-epithelium tissue section in the specific example 2 and the comparative example 2 of a 1st Example It is a figure which shows the immunohistochemical staining image of the corneal epithelial tissue section in the specific example 2 of a 1st Example, and the comparative example 2, and a p63 positive cell rate.
- a culture solution may be called a culture medium.
- FIG. 1 is a diagram showing an example of the structure of the cell culture container in the first embodiment.
- FIG. 1 (A) in FIG. 1 is a top view, (b) is an AA sectional view, and (c) is a BB sectional view.
- the cell culture container 1 is a square and flat container, and is made of plastic such as polycarbonate, polystyrene, polypropylene and the like having rigidity.
- the frame body 2 is formed by injection molding or the like, and circular portions 3, 4 and 5 are formed therein.
- a gas permeable film 6 is welded to the circle 3
- a material permeable film 7 is welded to the circle 4
- a gas permeable film 8 is welded to the circle 5.
- reference numeral 9 denotes a pair of protruding structure parts that supply and discharge the culture solution to the culture solution holding unit 28.
- the protruding structure 9 protrudes from the upper surface of the frame body 2 of the cell culture container 1 in a direction perpendicular to the film surfaces of the gas permeable membranes 6 and 8.
- Reference numeral 14 denotes a pair of culture fluid channels from the protrusion structure portion 9 to the culture fluid holding portion 28 which is a circular culture space.
- the pair of culture fluid passages 14 are connected to the opposing side surface positions of a substantially circular shape in each layer of the culture fluid holding unit 28.
- the average pore size of the substance-permeable membrane 7 is such that proteins and the like pass through. However, it is preferable that the cell does not pass.
- the material of the gas permeable membranes 6 and 8 and the material permeable membrane 7 is not limited to this as long as it has gas permeability such as polycarbonate and polystyrene and can be transparently observed for cell culture.
- gas permeability such as polycarbonate and polystyrene
- the materials of the frame 2, the gas permeable films 6, 8 and the material permeable film 7 are preferably the same or close to each other because of the melting point.
- the pair of protruding structure portions 9 provided in the cell culture container 1 are integrally formed with the cell culture container 1 and can connect a tube 10 made of an elastic member.
- the protrusion structure 9 has a trapezoidal tip, but is not limited to this shape, and any shape that can connect the tube 10 such as the protrusion structures 11 and 12 in FIG.
- the height of the protruding structure 9 is not particularly limited, but may be a height necessary for connecting the tube 10 from the viewpoint of usability.
- the cell culture container 1 of this example having such a structure is filled with a culture solution holding portion 28 formed by the substance permeable membrane 7 and the gas permeable membranes 6 and 8 provided in the frame body 2, Cell culture in a sealed space becomes possible.
- the culture container 1 is set up so that one of the protruding structure parts 9 forming the pair is on the lower side.
- the culture solution is injected from the protrusion structure 9 and the culture solution is discharged from the upper protrusion structure 9. Therefore, in the case of the cell culture container 1 having a two-layer structure, in order to efficiently inject the liquid into the upper and lower layers, as shown in FIG.
- the culture fluid flow path 14 from the protrusion structure part 9 to the culture fluid holding part 28 which is a circular culture space is connected to the top and bottom parts of the culture space when the cell culture vessel 1 is vertical. .
- culture solution can be efficiently injected and discharged.
- the culture medium holding unit 28 in the center of the cell culture vessel 1 according to the present embodiment is a circular or elliptical space such as a substantially cylindrical or elliptical column. This is because, for example, a circular or elliptical culture object such as a cornea is collected in a circular or elliptical form.
- the cell culture container 1 of FIG. 1 does not need to be a two-layer type, and various modified embodiments are configured.
- it may be a single-layer cell culture container in which gas permeable membranes 30 and 31 are welded to a frame 29.
- the single-layer cell culture container may be formed like the frame 32 having the bottom of FIG.
- the protrusion structure portion 9 of the cell culture container 1 of the various modified embodiments shown in FIGS. 1, 9, and 10 has a corresponding culture when the cell culture containers 1, 29, 32 are placed horizontally. It is not necessary to install on the upper surface of the frame body 2 located above the liquid holding part 28, and may be located on the side surface of the frame body 2 of the cell culture containers 1, 29 and 32 as shown in FIG.
- FIG. 4 shows a cell culture apparatus to which the cell culture container of the present embodiment is applied, in which a cell culture container 1 having a protruding structure to which a tube that is a liquid feeding pipe or a waste liquid pipe can be connected is disposed.
- 1 is a diagram schematically showing the overall configuration of a cell culture device 15.
- the cell culture device 15 includes a culture stage 16 that holds the cell culture container 1 and a drive unit 17 that rotates the culture stage 16. Further, the liquid feeding pipe 18 and the waste liquid pipe 19 connected to the cell culture container are connected to the culture liquid storage part 21 and the waste liquid storage part 22 via the control part 20.
- the culture solution storage unit 21 and the waste solution storage unit 22 are stored in a cool box 23 set to 4 ° C., for example. Then, the culture solution is appropriately heated to 37 ° C. by a heater or the like in the control unit 20 (not shown) and then supplied to the cell culture vessel 1.
- a cell observation device 25 having a ZYX movable shaft 24 is provided above or below the culture stage 16 so that the state of cells being cultured can be monitored and recorded as necessary. ing.
- the filling of the culture solution into the cell culture vessel 1 is performed as follows so that bubbles are not generated inside the cell culture vessel. That is, the culture stage 16 is set up vertically in the direction of arrow A by the drive unit 17 so that the liquid feeding pipe 18 connected to the cell culture container 1 is down, and the cell culture container 1 is filled with the mixed solution of cells and culture liquid. . After filling the cells and the culture solution, the culture stage 16 is leveled by the drive unit 17 and cultured at a predetermined temperature, humidity, gas composition and concentration for a predetermined time.
- the culture stage 16 When exchanging the culture medium during the culture, the culture stage 16 is set up vertically in the direction of arrow B by the drive unit 17 so that the waste liquid pipe 19 connected to the cell culture container 1 is downward, and the culture medium is sucked from the cell culture container 1. . After the suction, the culture stage 16 is set up vertically so that the liquid feeding tube 18 connected to the cell culture container 1 is downward, and the medium is filled in the cell culture container 1. After filling the culture medium, the culture stage 16 is again leveled by the drive unit 17 and the culture is resumed at a predetermined temperature, humidity, gas composition and concentration for a predetermined time.
- FIG. 5 is a diagram illustrating a method for releasing the connection between the cell culture device 15 and the cell culture container 1 after the cell culture is completed in the present embodiment.
- a member 26 that is connected to the protruding structure portion 9 of the cell culture container 1 and closes the tube such as a clamp in the middle of the tube 10, shuts off the middle of the tube 10 that is a liquid feed pipe or a waste liquid pipe,
- the cell culture container 1 can be taken out from the cell culture device 15 by cutting 27 with sterilized scissors or the like.
- the method of taking out the container is not limited to the above-described method, and a method of releasing a connection between the cell culture container and the cell culture apparatus by providing a member that enables a closed system in the middle of the tube may be used.
- FIG. 6 is a diagram showing a method of discharging the culture solution from the cell culture container 1 that has been disconnected from the cell culture device 15. By inclining the cell culture container so that the protruding structure on the side on which the culture solution is to be discharged is down, the culture solution can be easily discharged. The culture solution may be discharged immediately before the prepared regenerated tissue is required to prevent the regenerated tissue from drying.
- FIG. 7 is a diagram showing a procedure for recovering the regenerated tissue from the cell culture container.
- 71 indicates corneal epithelial cells and 72 indicates NIH-3T3 cells.
- a connected tube is taken from the cell culture container from which the culture solution has been discharged, and the gas permeable membrane 6 welded to the upper layer of the cell culture container 1 is removed with a cutter knife or the like.
- the corneal epithelial cells 71 that are the regenerated tissue can be washed with physiological saline or the like, and then the regenerated tissue can be collected.
- the gas permeable membrane 28 having a protruding portion with a part of the shape protruding is welded to the circular portion 3 of the cell culture container as in the modification shown in FIG. 8, the gas permeable membrane is lifted with tweezers without cutting. Thus, the gas permeable film 28 can be removed.
- this protrusion shape what is necessary is just a shape which can be lifted with tweezers, and is not necessarily limited to the shape of FIG.
- a method for recovering corneal epithelial cells 71 which are regenerative tissues a method using dispase, a fibrin gel, an amniotic membrane, a temperature-responsive polymer or the like is prepared on the cell culture surface in advance, so Although the tissue shape can be collected, it is not limited to these methods.
- FIG. 1 ⁇ Method for producing closed cell culture vessel>
- a frame 2 as shown in FIG. 1 was produced by injection molding (the material was polycarbonate).
- FIG. 12 shows the appearance of the frame body 2 actually produced. Gas permeation membranes were welded to circles 3 and 5 in FIG. 1, and a material permeable membrane was welded to circles 4 in FIG. 1 by ultrasonic welding (the ultrasonic welding machine uses 2000Xdt 40: 0.8 manufactured by Branson).
- the film welded to the circular portions 4 and 5 in FIG. 1 was subjected to a hydrophilic treatment using a plasma device (PC-300 manufactured by Samco Corporation was used as the plasma device).
- FIG. 13 shows the appearance of the state in which the culture solution is held in the container 1 after each film is welded.
- NIH-3T3 cells treated with mitomycin C (10 ⁇ g / ml) at 37 ° C. for 2 hours as seed cells were seeded in the lower layer of the cell culture vessel so as to be 2 ⁇ 10 4 / cm 2. did.
- corneal epithelial cells were collected from the corneal limbus of a rabbit eyeball purchased from Funakoshi in accordance with a conventional method, and seeded at 4 ⁇ 10 4 / cm 2 on the upper layer of the cell culture container. .
- KCM medium containing 5% FBS which is usually used for culturing epithelial cells, was used.
- the culture medium was exchanged once on the 5th, 7th, and 9th to 16th days from the beginning of the culture in the upper and lower layers of the cell culture container.
- the culture medium exchange after the ninth day was performed every 24 hours.
- ⁇ Method of peeling corneal epithelial tissue> The tissue was peeled and collected on the 16th day of culture. Tissue detachment was performed after filling the lower layer of a closed cell culture vessel with dispase (200 U / ml) and treating at 37 ° C. for 1 hour.
- ⁇ Method for measuring cell number of corneal epithelial tissue On the 16th day of culture, cells were collected from the cell culture vessel using a 0.25% trypsin solution, stained with trypan blue, and then the number of cells was measured with a cell number counting device (TC10, manufactured by Bio-Rad). The number of cells per culture area was calculated.
- tissue section preparation of corneal epithelial tissue, tissue section staining, immunohistochemical staining, colony formation method On the 16th day of culture, freeze-embedding was carried out according to a conventional method with the corneal epithelial cells adhered to the substance-permeable membrane. A 10 ⁇ m thick section was prepared from the frozen embedded tissue with a microtome. Using the prepared sections, hematoxylin-eosin staining, nuclear staining, and immunohistochemical staining were performed according to a conventional method.
- anti-pan-CK antibody (clone name Kspan1-8), anti-CK3 antibody (clone name AE5), anti-clodin 1 antibody (clone name A10), and anti-p63 antibody (clone name 4A4) were used. .
- Example 1 and Comparative Example 1 the number of p63 positive cells / total number of cells was obtained from 5 slices, and the p63 positive cell rate was calculated.
- the prepared cell sheet was made into a cell suspension using a 0.05% trypsin solution, 2000 cells of which were preliminarily NIH-3T3 cells at 2 ⁇ 10 4 / cm 2. It seed
- Example 1 Similar to Example 1 except that the cell culture vessel was a commercially available 6-well cell culture insert (open culture vessel), the number of seeded corneal epithelial cells was 2 ⁇ 10 4 / cm 2 , and the number of culture days was 14 days. The experiment was conducted.
- FIG. 14 is a diagram showing a phase contrast microscopic image of (a) and an appearance of a cell sheet of (b) in each of Specific Example 1 shown on the left side and Comparative Example 1 shown on the right side.
- the cell sheet could be peeled and collected without damage.
- FIG. 15 is a diagram showing the number of cells contained in the cell sheet. Specific Example 1 had almost the same number of cells as Comparative Example 1, and as a result of the significant difference test, there was no significant difference between the two.
- FIG. 16 is a diagram showing a hematoxylin-eosin (HE) -stained image of a corneal epithelial tissue section in Specific Example 1 on the left side and Comparative Example 1 on the right side.
- HE hematoxylin-eosin
- FIG. 17 is a diagram showing immunohistochemically stained images in the specific example 1 shown on the left side and the comparative example 1 shown on the right side.
- the CK protein family (PanCK) expressed in epithelial cells shown in (a) of the figure is expressed in all cells, and CK3 expressed in differentiated corneal epithelial cells is shown in (b) of the figure.
- P63 which is expressed in cells other than the basal layer and expressed in corneal epithelial stem cells / progenitor cells, is expressed in cells in the basal layer as shown in FIG.
- claudin 1 which is a necessary closing binding protein is expressed on the outermost layer, and the cell sheet prepared in Example 1 may function as a corneal epithelial tissue. It could be confirmed. Note that the bars shown in each photograph in FIG. 17 indicate 50 ⁇ m.
- the corneal epithelial tissue prepared with the cell culture container of the present example is required to have the same quality as that prepared with the 6-well cell culture insert (open culture container). From the results shown in FIGS. 14 to 17, it is clear that the corneal epithelial tissue having the same quality as that of Comparative Example 1 and sufficiently layered can be produced in Specific Example 1, and the cell culture container of the present Example Indicates that it is suitable for preparation of corneal epithelial tissue.
- a temperature-responsive culture surface was prepared by electron-polymerizing N-isopropylacrylamide, a temperature-responsive polymer monomer, on the cell culture surface of a closed culture vessel. After confirming that adhesion and desorption of corneal epithelial cells on the surface of the main culture were normal, a corneal epithelial tissue was prepared in the same manner as in Example 1.
- Comparative Example 2 The experiment was conducted in the same manner as in Comparative Example 1 except that the cell culture vessel was a cell culture insert for 6-well treated with temperature-responsive polymer (manufactured by Cellseed).
- FIG. 18 is a diagram showing the appearance of the peeled and collected cell sheets in Example 2 on the left side and Comparative Example 2 on the right side. In specific example 2, it was peelable without damage.
- FIG. 19 is a diagram showing a hematoxylin-eosin stained image ((a) of the figure) and an immunohistochemically stained image of a corneal epithelial tissue section in Specific Example 2 on the left side and Comparative Example 2 on the right side, respectively.
- the CK protein family expressed in epithelial cells is expressed in all cells and CK3 expressed in differentiated corneal epithelial cells is shown in (c) in the same figure.
- Claudin 1 which is expressed in cells other than the basal layer and is a closed binding protein necessary for the barrier function of epithelial tissue, was expressed in the outermost layer.
- FIG. 20 is a diagram showing the presence and positive cell rate of corneal epithelial stem cells / progenitor cells on corneal epithelial tissue sections in Example 2 and Comparative Example 2.
- p63 expressed in corneal epithelial stem cells / progenitor cells is expressed in cells of the basal layer as shown in (a) of the figure, and the positive cell rate is shown in (b) of the figure.
- FIG. 21 shows colony detection images derived from corneal epithelial stem cells / progenitor cells contained in the cell sheet in Example 2 and Comparative Example 2 ((a) in the figure), and colony formation rate ((b in the figure) )). There was no significant difference between Example 2 and Comparative Example 2, and both were 3% or more.
- FIG. 22 is a diagram showing an example of the structure (cross-sectional view) of the cell culture container in the second embodiment.
- the cell culture container 40 is a square container and is made of a plastic having rigidity with plasticity such as polycarbonate, polystyrene, and polypropylene.
- the frame 34 and the lid 35 constituting the container are formed by injection molding or the like, and have a structure in which the insert container 36 can be inserted.
- the insert container may be a commercially available product, such as a product manufactured by BD, a product manufactured by Corning, or a product manufactured by Greiner, and usable products are not limited.
- the lid 35 or the frame body 34 is provided with an elastic member 41 such as an O-ring so that particles containing gas and bacteria from the outside are not mixed.
- the connection of the lid portion 35 to the frame body 34 can be fixed by a screw thread provided on the lid portion 34 and the frame body 35, but is not limited thereto.
- the frame body 34 is provided with a flow path 37 having a protruding structure 38 for injecting and discharging air and water vapor.
- a tube 43 is attached to the tip of the flow path 37.
- the position of the flow path 37 in the frame should be changed according to the amount of the culture solution introduced into the container, but may be any position above the culture solution level.
- the frame body 34 is provided with a flow path 42 having a protruding structure for injecting and discharging the culture solution through the tube 43.
- the flow path 42 is desirably installed so that the bottom surface of the frame 34 and the lowermost part of the inner diameter of the flow path 42 have the same height. By doing so, the culture medium can be efficiently discharged.
- the frame 34 may be tilted as appropriate.
- the lid 35 is provided with a flow path 39 having a protruding structure for injecting and discharging the culture solution into the insert container.
- the flow path 39 is preferably arranged so as not to hinder cell observation.
- the length of the flow path 39 is preferably long enough not to touch the bottom surface of the insert container.
- FIG. 23 shows a three-dimensional view of the schematic diagram shown in FIG. (A) of the figure shows a perspective three-dimensional structure, and (b) of the figure shows a cross-sectional three-dimensional structure.
- FIG. 24 shows the appearance of a prototype of the cell culture container of this example. (A) in the figure shows a photograph from the upper direction, and (b) in the figure shows a photograph from the oblique direction. Recovered tissue can be easily recovered by removing the lid 35 from the frame 34.
- FIG. 25 shows the configuration of the cell culture container of the third embodiment.
- parts having the same numbers as those in FIG. 22 indicate the same items.
- ⁇ Structure of cell culture container> As shown in FIG. 25, in the case of single-layer culture, the basic structure is the same as in Example 2. However, by using a lid 44 without a flow path as a newly used cell culture vessel 45, the frame 42 Cell culture is performed using the culture solution stored in the internal space 46.
- the cell culture containers according to the second and third embodiments can also be safely and safely produced in a regenerated tissue by being installed in the cell culture apparatus described with reference to FIG.
- the culture solution can be sent and discharged into the cell culture vessel, and the cells can be cultured automatically in a completely closed system.
- invasion of particles containing microorganisms from outside the cell culture space can be suppressed, and cell culture can be performed safely and securely.
- the culture solution when the culture solution is discharged from the cell culture vessel after the cell culture is completed, the culture solution can be discharged without inserting a culture solution collecting device into the cell culture vessel. Invasion can be suppressed, and the cultured cells can be recovered safely.
- the present invention is useful as a cell culture container and a cell culture apparatus using the same.
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Abstract
Description
図1は、第1の実施例における細胞培養容器の構造の一例を示す図である。
図4は、本実施例の細胞培養容器が適用される細胞培養装置であって、送液管や廃液管であるチューブが接続可能な突起構造を具備する細胞培養容器1が内部に配置された細胞培養装置15の全体の構成を模式的に示す図である。
図5は、本実施例において、細胞培養終了後に、細胞培養装置15と細胞培養容器1の接続を解除する方法を示す図である。細胞培養容器1の突起構造部9に接続されている、チューブ10の途中にクレンメ等のチューブを閉鎖する部材26で、送液管や廃液管であるチューブ10の途中を遮断し、遮断した先27を滅菌済のハサミ等で切断することで、細胞培養装置15から細胞培養容器1を取り出すことができる。
図6は、細胞培養装置15から接続を解除した細胞培養容器1からの培養液の排出方法を示す図である。培養液を排出させたい側の突起構造が下になるように細胞培養容器を傾けることで、培養液を簡単に排出することができる。培養液の排出は、再生組織の乾燥を防ぐために、作製した再生組織が必要となる時の直前でよい。
図7は再生組織を細胞培養容器から回収する手順を示す図である。同図において、71は角膜上皮細胞、72はNIH-3T3細胞を示す。まず培養液が排出された細胞培養容器から、接続されているチューブをとり、細胞培養容器1の上層に溶着されたガス透過膜6をカッターナイフなどで除去する。その後、再生組織である角膜上皮細胞71を生理食塩水等で洗浄した後に再生組織を回収することができる。図8に示す変形例のように、細胞培養容器の円部3に形状の一部が突出した突出部をもつガス透過膜28を溶着すれば、ガス透過膜を切ることなく、ピンセットで持ち上げることでガス透過膜28の除去が可能である。なお、この突出形状については、ピンセットで持ち上げることができる形状であればよく、図8の形状に限定されるわけではない。
<閉鎖系細胞培養容器の作製方法>
まず、図1に示すような枠体2を射出成形によりを作製した(材料はポリカーボネートを採用)。図12に実際に作製した枠体2の外観を示す。図1の円部3、5にはガス透過膜、図1の円部4には物質透過膜を超音波溶着法で溶着した(超音波溶着機はブランソン社製2000Xdt 40:0.8を使用)。図1の円部4、5に溶着した膜はプラズマ装置で親水化処理を実施した(プラズマ装置はサムコ社製PC-300を使用)。図13に各膜溶着後、培養液を容器1内に保持した状態の外観を示す。
続いて、作製した細胞培養容器を用いた角膜上皮細胞の培養方法について説明する。角膜上皮細胞を培養する前日に、フィーダー細胞として、マイトマイシンC(10μg/ml)で37℃2時間処理したNIH-3T3細胞を2×104/cm2となるように、細胞培養容器下層に播種した。NIH-3T3細胞を播種した翌日に、フナコシ社より購入したウサギ眼球の角膜輪部から常法に従って角膜上皮細胞を採取し、細胞培養容器の上層に4×104/cm2 なるように播種した。培養液には、通常上皮系細胞の培養に用いられる5%FBSを含むKCM培地を用いた。培養液の交換は、細胞培養容器の上層下層共に、培養開始5、7、9~16日目に1回行った。9日目以降の培養液交換は24時間毎とした。
培養16日目に組織を剥離回収した。組織の剥離はディスパーゼ(200U/ml)を閉鎖系細胞培養容器の下層に満たし、37℃で1時間処理した後に実施した。
培養16日目に0.25%トリプシン溶液を用いて細胞培養容器より細胞を回収し、トリパンブルー染色後、細胞数カウント装置(TC10、バイオラッド社製)で細胞数を計測し、細胞培養容器の培養面積当たりの細胞数を算出した。
培養16日目に、角膜上皮細胞が物質透過膜に接着した状態で、常法に従い凍結包埋を実施した。凍結包埋した組織から, ミクロトームで厚さ10 μmの切片を作製した。作製した切片を用いて常法に従い、ヘマトキシリンーエオジン染色、核染色、免疫組織染色を行った。免疫組織染色には、抗pan-CK抗体(クローン名Kspan1-8)、抗CK3抗体(クローン名AE5)、抗クローディン1抗体(クローン名A10)、抗p63抗体(クローン名4A4)を用いた。
細胞培養容器を市販の6ウェル用セルカルチャインサート(開放系培養容器)とし、角膜上皮細胞の播種数を2×104/cm2、培養日数を14日とした以外は具体例1と同様に実験を行った。
図14は、その左側に示す具体例1、右側に示す比較例1それぞれにおける、(a)の位相差顕微鏡像と、(b)の細胞シート外観を示す図である。具体例1において、損傷なく細胞シートが剥離回収可能であった。
<閉鎖系培養容器への温度応答性高分子処理と角膜上皮細胞培養>
閉鎖系培養容器の細胞培養表面に温度応答性高分子モノマーであるN-イソプロピルアクリルアミドを電子線重合させることで、温度応答性培養表面を作製した。本培養表面上での角膜上皮細胞の接着、脱着が正常になされることを確認した上で、具体例1同様に角膜上皮組織を作製した。
培養16日目に室温の新鮮な培養液に交換し、室温(約25℃)で30分静置した。その後、支持膜として、ドーナツ状にカットした親水性PVDFメンブレン(ミリポア社製)を用いて、細胞シートを培養表面より剥離回収した。
具体例1と同様に実施した。
細胞培養容器を温度応答性高分子処理済6ウェル用セルカルチャインサート(セルシード社製)とした以外は比較例1と同様に実験を行った。
図18は、その左側に具体例2、右側に比較例2における、それぞれ剥離回収した細胞シートの外観を示す図である。具体例2で損傷なく剥離可能であった。
図22は、第2の実施例における細胞培養容器の構造(断面図)の一例を示す図である。細胞培養容器40は正方形の容器であって、ポリカーボネート、ポリスチレン、ポリプロピレンなどの可塑性と共に剛性有するプラスチックから成る。容器を構成する枠体34と蓋部35は射出成形などにより形成され、内部にインサート容器36を挿入可能な構造となっている。インサート容器は市販のものでよく、BD社製、コーニング社製、グライナー社製などで、使用可能な製品は限定されない。蓋部35もしくは枠体34には、Oリングなどの弾性部材41が設けられ、それにより外部からの気体や菌を含む粒子が混入しない。蓋部35の枠体34への接続は、蓋部34および枠体35に設けられたネジ山により固定できるが、これに限定されるものではない。
<細胞培養容器の構造>
図25に示すように、1層培養の際は、基本構造は実施例2と同様であるが、流路なしの蓋部44を新たに用いる細胞培養容器45とすることにより、枠体42の内部空間46に蓄えられた培養液を用いて細胞培養が行われる。
2…枠体
3、4及び5…円部
6…ガス透過膜
7…物質透過膜
8…ガス透過膜
9…突起構造部
10…チューブ
11及び12…突起構造部
14…培養液流路
15…細胞培養装置
16…培養ステージ
17…回転運動の駆動部
18…送液管
19…廃液管
20…制御部
21…培養液保管部
22…廃液収容部
23…保冷庫
24…XYZ可動軸
25…細胞観察用機器
26…チューブを閉鎖する部材
28…培養液保持部
34…枠体
35…蓋部
36…インサート容器
37、39、42…流路
38…突起
40、45…細胞培養容器
41…弾性部材
43…チューブ
44…蓋部
Claims (20)
- 細胞培養装置に装着され、細胞を保持・培養する細胞培養容器であって、
培養液を保持する培養液保持部と、
前記培養液を供給、排出するための突起構造部と、
前記突起構造部から前記培養液保持部まで通ずる培養液流路を備える、
ことを特徴とする細胞培養容器。 - 請求項1に記載の細胞培養容器であって、
前記突起構造部と前記培養液流路をそれぞれ一対備える、
ことを特徴とする細胞培養容器。 - 請求項1に記載の細胞培養容器であって、
細胞を保持、培養するため、前記培養液保持部の少なくとも片面にガス透過膜を有する、ことを特徴とする細胞培養容器。 - 請求項1に記載の細胞培養容器であって、
前記突起構造部は、弾性部材からなるチューブが接続可能である、
ことを特徴とする細胞培養容器。 - 請求項1に記載の細胞培養容器であって、
前記培養液保持部は物質透過膜を挟んだ2層構造を有し、前記突起構造部と前記培養液流路が、前記2層構造の各層に形成されている、
ことを特徴とする細胞培養容器。 - 請求項1に記載の細胞培養容器であって、
細胞を保持、培養するため、前記培養液保持部の両面にガス透過膜を有する、
ことを特徴とする細胞培養容器。 - 請求項3に記載の細胞培養容器であって、
前記培養液保持部の他の片面が前記細胞培養容器の枠体と一体で形成される、
ことを特徴とする細胞培養容器。 - 請求項3に記載の細胞培養容器であって、
前記ガス透過膜は、前記培養液保持部の少なくとも片面に溶着され、その外周の一部に突出した突出部を備える、
ことを特徴とする細胞培養容器。 - 請求項3に記載の細胞培養容器であって、
前記突起構造部は、前記細胞培養容器の枠体の上面から、前記ガス透過膜の膜面に垂直な方向に突出している、
ことを特徴とする細胞培養容器。 - 請求項3に記載の細胞培養容器であって、
前記突起構造物は、前記細胞培養容器の枠体の側面から、前記ガス透過膜の膜面と平行な方向に突出している、
ことを特徴とする細胞培養容器。 - 請求項2に記載の細胞培養容器であって、
前記培養液保持部は、ほぼ円形形状を有し、一対の前記培養液流路が、円形形状の対抗する位置に接続されている、
ことを特徴とする細胞培養容器。 - 請求項1に記載の細胞培養容器であって、
前記培養液保持部は、前記培養液を保持する枠体と、前記枠体の上部を覆う蓋部を備え、前記培養液流路が、前記枠体に設けられている、
ことを特徴とする細胞培養容器。 - 請求項2に記載の細胞培養容器であって、
前記培養液保持部は、前記培養液を保持する枠体と、前記枠体の上部を覆う蓋部を備え、一対の前記培養液流路の一方が前記枠体に、他方が前記蓋部に設けられている、
ことを特徴とする細胞培養容器。 - 細胞培養容器内で細胞を培養する細胞培養装置であって、
前記細胞培養容器を保持する培養ステージと、
培養液を保管するための培養液保管部と、
廃液を溜めるための廃液収容部と、
前記培養液保管部から前記細胞培養容器まで前記培養液を供給するための送液管と、
前記細胞培養容器から廃液を回収し、当該廃液を前記廃液収容部まで送る廃液管を備え、前記細胞培養容器は、前記培養液を保持する培養液保持部と、前記培養液を供給、排出するための突起構造部と、前記突起構造部から前記培養液保持部まで通ずる培養液流路を備え、前記突起構造部と、前記送液管と前記廃液管それぞれの一端が接続される、
ことを特徴とする細胞培養装置。 - 請求項14に記載の細胞培養装置であって、
前記突起構造部と前記培養液流路を一対備える、
ことを特徴とする細胞培養装置。 - 請求項14に記載の細胞培養装置であって、
前記細胞培養容器は、前記細胞を保持、培養するため、前記培養液保持部の少なくとも片面にガス透過膜を有する、
ことを特徴とする細胞培養装置。 - 請求項14に記載の細胞培養装置であって、
前記送液管と前記廃液管は弾性部材からなるチューブで構成される、
ことを特徴とする細胞培養装置。 - 請求項14に記載の細胞培養装置であって、
前記培養ステージを回転し、搭載される前記細胞培養容器が水平に保持された状態と、垂直に保持される状態を取るよう回転運動する駆動部を更に有する、
ことを特徴とする細胞培養装置。 - 請求項18に記載の細胞培養装置であって、
前記細胞培養容器の前記培養通路は、前記駆動部によって垂直に保持された状態で、前記培養液保持部の最頂部及び最低部に接続されている、
ことを特徴とする細胞培養装置。 - 請求項15に記載の細胞培養装置であって、
前記培養液保持部は、前記培養液を保持する枠体と、前記枠体の上部を覆う蓋部を備え、一対の前記培養液流路の一方が前記枠体に、他方が前記蓋部に設けられている、
ことを特徴とする細胞培養装置。
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WO2020017067A1 (ja) * | 2018-07-19 | 2020-01-23 | 株式会社サンプラテック | 灌流培養用アタッチメント |
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JP7219978B2 (ja) | 2018-07-19 | 2023-02-09 | 株式会社サンプラテック | 灌流培養用アタッチメント |
Also Published As
Publication number | Publication date |
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EP2594628A1 (en) | 2013-05-22 |
JP2015163076A (ja) | 2015-09-10 |
JPWO2012008368A1 (ja) | 2013-09-09 |
CN102985526A (zh) | 2013-03-20 |
US20130115690A1 (en) | 2013-05-09 |
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