WO2016121292A1 - 細胞培養方法、及び細胞培養装置 - Google Patents
細胞培養方法、及び細胞培養装置 Download PDFInfo
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- WO2016121292A1 WO2016121292A1 PCT/JP2016/000002 JP2016000002W WO2016121292A1 WO 2016121292 A1 WO2016121292 A1 WO 2016121292A1 JP 2016000002 W JP2016000002 W JP 2016000002W WO 2016121292 A1 WO2016121292 A1 WO 2016121292A1
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Definitions
- the present invention relates to a cell culture method and a cell culture device for culturing cells in an artificial environment.
- cells in an artificial environment
- cells in an artificial environment
- the cell density in the culture solution hereinafter, including cells and medium
- the depletion of medium components necessary for growth and the accumulation of metabolites of the cell itself occur. Occurs, the growth rate decreases and the cell density reaches saturation. For this reason, when cells are cultured on a certain scale, they are usually cultured with repeated passages so that the cell density is maintained appropriately.
- the well plate is transferred to a flask.
- a cell culture well plate start the culture by adding cells to the individual wells together with the medium so that the cell density is moderate, and after the cells have grown sufficiently in the wells, transfer them to the cell culture flask. Incubate with additional culture medium in line with cell growth, and subculture, and when it grows to a certain volume, transfer it to a flask or bag with a larger volume.
- the cells were repeatedly cultured in large quantities (see, for example, paragraph [0027] of Patent Document 1).
- the cells when using cryopreserved cells, the cells are thawed and cultured in a high density state for several days using a well plate in order to restore the original function of the cells (hereinafter referred to as “curative culture”).
- curative culture There is also a method in which cell function is restored to its original state, transferred to a flask and cultured (hereinafter referred to as “expanded culture”), and then activated culture in which antibody stimulation is performed (for example, Patent Document 2 [0057] paragraph).
- the present invention has been made in view of the above circumstances, maintains the cell density at the time of culturing appropriately, further eliminates the work of transferring the culture container when growing the cells in large quantities, and reduces damage to the cells.
- An object of the present invention is to provide a cell culture method and a cell culture apparatus that can reduce the risk of contamination.
- the cell culture method according to the present invention is a cell culture method for performing cell culture by supplying a medium together with cells to a container made of a flexible material, wherein the bottom surface of the container is partially raised to form a plurality of compartments.
- the cells are cultured for each of the compartments, and then the compartments are eliminated, thereby expanding the culture area in the container.
- the cell culture device is a cell culture device that performs cell culture by supplying a medium together with cells to a container made of a flexible material, and has a planar mounting surface that holds the container.
- a partition piece that can be projected at a predetermined height from the mounting surface is embedded in the base, and when the partition piece is accommodated in the base, the upper end surface of the partition piece is The configuration is the same as the mounting surface described above.
- the culture area in the container is expanded when the density of the proliferated cells increases beyond a certain level and exceeds the range suitable for culture.
- the transfer operation movement of a culture container is unnecessary and it becomes possible to reduce the damage to a cell and the risk of contamination because a culture solution stays in the same culture container.
- cell culture method is performed by supplying a container 1 made of a flexible material together with a cell (cultured cell) C to be cultured together with a medium M for culturing the cell C.
- This is a cell culture method to be performed, and in particular, a cell culture method suitable for culturing damaged cells such as cells collected from patients or frozen cells, while restoring the original function of the cells. is there.
- the container 1 is formed into a bag shape (bag shape) using a flexible material, and the shape is usually a rectangular shape.
- the four sides are formed by heat sealing. It can be sealed or can be made into an integrally formed bag by blow molding.
- the shape of the container 1 may be a square shape, an elliptical shape, a circular shape, or the like, and may be various shapes as necessary.
- the container 1 is preferably capable of performing cell culture in a closed system (closed system) and has gas permeability to oxygen and carbon dioxide necessary for use in a CO 2 incubator, In particular, it is preferable to be suitable for use in a culture environment of 37 ° C. and 5% carbon dioxide concentration.
- the container 1 is preferably partially or entirely transparent so that the progress of cell culture and the state of the cells can be confirmed, so that the cells can be propagated more efficiently. In addition, it preferably has low cytotoxicity, low dissolution and suitability for radiation sterilization.
- Polyethylene resins such as ionomers using coalescence and metal ions can be mentioned, but other polyolefins, styrene elastomers, polyester thermoplastic elastomers, silicone thermoplastic elastomers, silicone resins, and the like can also be used.
- the tube 12 is connected to one side of the short side of the rectangular container 1.
- the cells and the culture medium are supplied from the outside to the container 1 through the tube 12, and the cells and the culture medium are collected from the container 1 after the process in the container 1 is finished.
- Two tubes may be connected for recovery.
- a tube for taking out the sample may be connected.
- the tube 12 may be connected to a tubular port attached to the container 1, and the container 1 can reduce the residual liquid when cells and culture medium are collected from the container 1. It is also possible to form the housing portion so that the shape gradually decreases toward the port.
- silicone rubber soft vinyl chloride resin, polybutadiene resin, ethylene-vinyl acetate copolymer, chlorinated polyethylene resin, polyurethane-based thermoplastic elastomer, polyester-based thermoplastic elastomer, silicone-based thermoplastic elastomer, styrene A system elastomer or the like can be used.
- styrene elastomer examples include SBS (styrene / butadiene / styrene), SIS (styrene / isoprene / styrene), SEBS (styrene / ethylene / butylene / styrene), SEPS (styrene / ethylene / propylene / styrene), and the like. Can be used.
- the cell culturing method uses such a container 1 for culturing cells that have been damaged from function such as cells collected from patients and cells thawed after cryopreservation.
- a curing culture process for culturing the cell while curing the cell in the initial stage of cell culture, and expanding the culture area in the container after the cell curing has progressed to some extent, And an expansion culture step of continuing the cell culture until the cell density is reached.
- the container 1 supplied with the medium M together with the cells C is held on the base 2 having the planar placement surface 20, and the placement surface 20.
- the bottom surface of the container 1 is partially raised to partition it into a plurality of compartments 10, and the cells C are cultured in each partitioned compartment 10.
- the bottom portion of the container 1 is raised so that the bent portion pushed up by the partition piece 3 is lifted from the placement surface 20, and the remaining flat portion in contact with the placement surface 20 becomes the culture surface. .
- the cells C are supplied to the container 1 in a state of being suspended in the medium M, the cells C are then placed on the bottom surface of the container 1 regardless of whether they are floating cells or anchorage-dependent cells. Sedimentation is performed, but the sedimented cells C gather on the culture surface of each compartment 10 so that the cells C can be cultured in a state where the cell density is increased.
- cells C are collected on the culture surface of each compartment 10 and cell culture is performed.
- the number, interval, size, etc. of the compartments 10 formed on the bottom surface of the container 1 are as follows.
- the density of the cells C collected on the culture surface of each compartment 10 can be adjusted to an appropriate range.
- the area of the culture surface in each compartment 10 depends on the type of cell C to be cultured, the inoculation concentration, etc., of each well of a well plate (for example, a 24-well plate) that has been used for subcultures. It is preferable to make it the same as the bottom area.
- the partition piece 3 that partitions the bottom of the container 1 is formed in a short shape with a predetermined thickness, so that the cells C in culture do not move between the compartments.
- the thickness and the protruding height from the placement surface 20 are set as appropriate.
- the thickness of the partition piece 3 is preferably 0.5 to 2.0 mm, and the protruding height from the placement surface 20 is preferably 0.5 to 1.5 mm.
- the cells C are cultured in a state where the cell density is increased for each of the compartments 10 formed on the bottom surface of the container 1, and the density of the cells C thus proliferated (unit area on the culture surface of each compartment 10). After the number of cells per cell) increases above a certain level, the process proceeds to the expansion culture process.
- the partition piece 3 is accommodated in the base 2, and the upper end surface of the partition piece 3 is flush with the placement surface 20, thereby eliminating the partition 10 and the container.
- the culture area is expanded using 1 inside as one section. That is, in the curing culture process, the bottom surface of the container 1 is raised by the partition piece 3 so that the bent portion is raised from the placement surface 20 and is partitioned into a plurality of compartments 10 as described above.
- the partition piece 3 is accommodated in the base 2, the upper end surface thereof is flush with the mounting surface 20, and the section 10 is eliminated, the portion is flattened by the weight of the content liquid. As a result, it can be used as a culture surface, and the culture area in the container is expanded accordingly.
- the cells C are cultured while being cured in a state where the cell density is increased. Then, when the density of the proliferated cells C exceeds a certain level and exceeds the range suitable for culture, the process proceeds to an expansion culture step, the culture area in the container is expanded, and the cells until the predetermined cell density is reached. Continue culturing C. In expanding the culture area in the container and continuing the cell culture, the medium 1 is additionally supplied to the container 1 as necessary.
- the container 1 when shifting to an expansion culture process, it is preferable to stir the contents liquid of the container 1. For example, after moving the container 1 upward from the initial position, the container 1 is returned to the initial position, and the operation of applying vibration to the container 1 that has returned to the initial position is repeated to stir the content liquid in the container 1. be able to.
- the cell C diffuses so as to rise in the content liquid by vibration applied to the container 1.
- the content liquid in the container 1 is efficiently stirred in the vertical direction, the distribution of the cells C in the content liquid in the container 1 and the component concentration of the medium M are made uniform, and a good culture environment is maintained.
- the present embodiment when the present embodiment is applied and, for example, floating cells such as lymphocytes are cultured, the cells C are generated by collecting the cells C for each of the compartments 10 formed on the bottom surface of the container 1.
- the concentration of an activator such as a cytokine is locally increased, and an interaction between cells is generated, so that the cells can be cultured with an increased cell activity.
- the cell C can be efficiently cultured while maintaining an appropriate cell density in the same container by expanding the culture area in the container after the proliferation of the cell C proceeds to some extent.
- the present embodiment restores the original function of the cell by curing cells that have been damaged such as cells just collected from patients or cells that have been thawed after cryopreservation. It can be particularly suitably used for efficient culture.
- the culture surface of each compartment 10 formed on the bottom surface of the container 1 is used.
- the cell C adheres and proliferates, and then the culture area in which the cells C can proliferate can be expanded with an appropriate arrangement by eliminating the section 10 and expanding the culture area in the container. For this reason, as in subculture, it is necessary to perform a complicated operation that may cause a reduction in proliferation efficiency, such as detaching and collecting cells from the culture surface and seeding the cells in a new culture vessel.
- cell culture can be efficiently performed in the same culture environment as that of subculture in the same container.
- the container 1 used by this embodiment consists of a flexible material, it is easy to bend and a shape is not stable. For this reason, in general, if the container 1 is deformed due to vibrations or the like during a culture period that takes several days, the content liquid flows excessively and damages the cells, reducing the culture efficiency. It can be considered. In view of such circumstances, in this embodiment, when the culture medium M is supplied to the container 1 made of a flexible material together with the cells C to perform cell culture, vibration is applied during a long culture period. However, the container 1 is not easily deformed so that the flow of the content liquid that damages the growing cells C can be suppressed and the cells C can be efficiently proliferated. Cell culture is preferably performed in a state where the inside is pressurized, but this will be described later.
- FIG. 3 is a perspective view showing an outline of the cell culture device according to the present embodiment.
- the culture apparatus 100 includes the base 2 having the planar mounting surface 20 that holds the container 1 as described above.
- the base 2 has one end on the short side supported by the support frame 4 and is rotatable about the axis.
- the base 2 includes a holding member 21 that forms the placement surface 20 and a partition plate 30 disposed below the holding member 21.
- the partition plate 30 includes a plurality of short partitions.
- the pieces 3 are erected in parallel at regular intervals.
- a plurality of slits 22 are arranged in parallel along the longitudinal direction on the mounting surface 20 of the holding member 21, and the partition pieces 3 erected on the partition plate 30 protrude from the slits 22, respectively. It can be made to. In this way, the partition piece 3 that can protrude from the placement surface 20 at a predetermined height is embedded in the base 2.
- FIG. 4 shows an exploded perspective view of the base 2 included in the culture apparatus 100 shown in FIG. 3.
- the side surfaces Two pairs of notches 31 are formed by notching opposing portions with a certain width. Then, with the two guide members 32 fitted into the notches 31 in a loosely fitting manner, the guide members 32 are attached to the holding member 21, so that the partition plate 30 is placed below the holding member 21. It is arranged. At this time, when the partition plate 30 is lifted from the guide member 32 and pressed against the holding member 21, the partition piece 3 protrudes from the placement surface 20 at a predetermined height, and the partition plate 30 is guided by the guide member 32. The shape, size, etc. of each member are adjusted as appropriate so that the upper end surface of the partition piece 3 is flush with the placement surface 20 (see FIGS. 6 and 9).
- two support members 40 having an L-shaped cross section are rotatably mounted with the long-side base end side pivotally supported. Yes.
- the support member 40 When the long side is parallel to the vertical direction, the support member 40 has a long side that comes into contact with the lower surface of the partition plate 30, thereby lifting the partition plate 30 and pressing it against the holding member 21. 30 is supported (see FIG. 6).
- the support member 40 rotates so that the long side is inclined with respect to the vertical direction by the weight of the short side (see FIG. 7).
- the partition plate 30 that has lost its support is lowered to a position where it is supported by the guide member 32. Thereby, the partition piece 3 is accommodated in the base 2, and the upper end surface of the partition piece 3 is flush with the placement surface 20.
- the base 2 is provided with a pressing plate 23 for pressing the upper surface side of the container 1 held on the mounting surface 20 to pressurize the inside of the container.
- the pressing plate 23 can be moved up and down in accordance with the internal volume of the container 1 (see FIGS. 11 and 12).
- elongated guide holes 24 are formed at the four corners of the base 2.
- the annular rising piece 25 is erected, and the guide hole 24 can be attached by inserting pins 26 protruding horizontally at the four corners of the pressing plate 23.
- a groove shape is formed on the upper end side of two annular rising pieces 25 located at both ends of one long side of the base 2 among the four annular rising pieces 25 provided on the base 2.
- a cut-out thin portion 27 is formed. Accordingly, when the pin 26 inserted into the guide hole 24 of the annular rising piece 25 applies a force in a state where the pin 26 is in contact with the upper edge of the guide hole 24 when the pressing plate 23 is lifted, the thin portion 27 is removed. It passes through the guide hole 24 through it.
- the pressing plate 23 is lifted diagonally so that the mounting surface 20 can be opened.
- the holes 11 drilled at the four corners of the container 1 are locked to the fixtures 28 provided at the four corners of the base 2, and the tube 12 connected to the container 1 is fixed to the tube fixing member 29.
- the container 1 can be attached to the culture apparatus 100.
- the medium 1 is supplied to the container 1 together with the cells C, and a predetermined amount of content liquid is stored in the container.
- the hooks 41 and 42 are locked to the two sides on the short side of the press plate 23,
- the pressing plate 23 can be fixed at a lower position, whereby the upper surface side of the container 1 held on the mounting surface 20 is pressed by the pressing plate 23 and the inside of the container is pressurized. I am doing so.
- the hooks 41 and 42 that are locked to the pressing plate 23 are pivotally supported by the support frame 4, respectively.
- the hooks 41 and 42 are rotated and locked and released from the pressing plate 23. It has become so.
- the pressing plate 23 from which the hooks 41 and 42 are unlocked can be moved up to an upper position where the pin 26 contacts the upper edge of the guide hole 24.
- 6 to 9 are explanatory diagrams for explaining the operation of the cell culture device according to the present embodiment, and the cross sections shown in these drawings correspond to the AA cross section of FIG.
- FIG. 6 shows an initial state of the culture apparatus 100.
- the bottom surface of the container 1 is partitioned into a plurality of compartments 10 by the partition piece 3 protruding at a predetermined height from the placement surface 20 (see FIG. 1).
- the preparation which performs the curing culture process of the cell culture method mentioned above is completed.
- the container 1 is not shown in FIGS. 6 to 9, in the curing culture step, as shown in FIG. 11, the upper surface side of the container 1 is pressed by the pressing plate 23 fixed at the lower position.
- the amount of the medium M to be supplied to the container 1 is adjusted so that the inner volume is such that the inside is pressurized.
- the pressing plate 23 is returned from the state shown in FIG. 5 and pressed against the container 1, and at the two short sides of the pressing plate 23.
- the inside of the container can be pressurized by pressing the upper surface side of the container 1 held on the placement surface 20 with the pressing plate 23.
- the container By placing the container in a pressurized state, it is possible to suppress excessive flow of the content liquid in the container and prevent damage to the cells C during culture. Furthermore, if the gas dissolved in the medium M is vaporized and bubbles remain in the container, the fine bubbles refract the illumination optical path when observing the inside of the container, and the container cannot be clearly observed.
- gas such as oxygen diffuses from outside into the culture solution in the container, the gas and film, the film gas movement of the film and the culture solution in two places, the bubbles stay in the container, There is a risk that the film gas moves in three places, gas and film, film and bubble, bubble and culture solution, and there is a risk that the gas diffusion to the culture solution in the container is reduced.
- pressurizing the inside of the container vaporization of the gas dissolved in the culture medium M can also be suppressed, so that the above-described problems can be prevented.
- the curing culture process is performed in this way, and after the curing culture process has progressed and the density of the proliferated cells C has increased beyond a certain range and exceeds the range suitable for the culture, the expansion culture process is performed. Transition.
- the push-up member 5 when moving to the expansion culture step, the push-up member 5 is moved upward, and the base 2 pivotally supported by the support frame 4 is rotated upward around the axis.
- the support member 40 having an L-shaped cross section that supports the partition plate 30 is released from contact with the partition plate 30, and the long side is vertical in the vertical direction due to the weight of the short side. It rotates so as to be inclined with respect to.
- the partition plate 30 that has lost support by the support member 40 is lowered to a position where it is supported by the guide member 32, and accordingly, the partition piece 3 is accommodated in the base 2, and the upper end surface of the partition piece 3 Is flush with the mounting surface 20.
- the section 10 partitioned by the partition piece 3 is eliminated, and the inside of the container becomes one section and the culture area is expanded (see FIG. 2).
- the hooks 41 and 42 are locked to the two sides on the short side of the pressing plate 23, but the hooks 41 and 42 are locked by rotating the base 2 upward. Canceled. That is, in the present embodiment, the push-up member 5 that has moved upward is brought into contact with the contact member 50 provided on the short side opposite to the side on which the rotation shaft of the base 2 is provided. When the base 2 is rotated upward, a beam-shaped contact piece 51 is installed on the contact member 50. When the push-up member 5 comes into contact with the contact member 50 and rotates the base 2 upward, the contact piece 51 contacts the lower tongue piece 41a of one hook 41 as shown in FIG. The hook 41 rotates in contact with it, and thereby the lock is released. Then, when the base 2 is further rotated upward, as shown in FIG. 8, the other hook 42 is rotated so as to be pushed by the base 2, and the hook 42 is unlocked. It is.
- the push-up member 5 is moved downward. Thereby, as shown in FIG. 9, the base 2 rotates downward and returns to the initial position. At this time, the vibration is transmitted to the container 1 held on the mounting surface 20 of the base 2 by the impact of the support frame 4 receiving the base 2. In this way, by moving the push-up member 5 up and down and repeating the pivoting operation of the base 2, the container 1 is moved upward from the initial position, and then the container 1 is returned to the initial position. The operation
- movement which applies a vibration to the container 1 which returned to the position will be repeated, and, thereby, the content liquid of the container 1 can be stirred.
- the drive mechanism for moving the push-up member 5 up and down includes a plate cam 5b having a first cam surface 5c having an arcuate outline and a second cam surface 5d having a rectilinear outline.
- a plate cam 5b having a first cam surface 5c having an arcuate outline and a second cam surface 5d having a rectilinear outline.
- it can be configured as a cam mechanism using a receiving plate 5a provided horizontally at the base end of the push-up member 5 as a follower, it is not limited to this.
- the curvature of the cam surfaces 5c and 5d, the position of the drive shaft 5e for rotating the plate cam 5b, and the rotational speed of the drive shaft 5e are set as appropriate, and the first cam surface 5c pushes up the receiving plate 5a.
- the push-up member 5 moves upward (see FIGS. 10A to 10E), and when switching to the second cam surface 5d, the plate cam 5b is separated from the receiving plate 5a so that the push-up member 5 falls.
- FIGS. 10 (f) to 10 (h) the vertical movement of the push-up member 5 is repeated as the plate cam 5b rotates in a certain direction. If the drive mechanism is configured in this manner, when the base 2 is rotated downward to return to the initial position, the base 2 is rotated so as to drop, and the support frame 4 is thus supported by the base 2. A shock will be generated when receiving.
- the culture medium M is additionally supplied to the container 1.
- the pressing plate 23 is pushed up by the container 1 whose internal capacity is increased and the thickness is increased, but the pin 26 protruding from the pressing plate 23 is provided.
- the pressing plate 23 cannot move above it and is fixed at the upper position (see FIG. 12).
- the transition to the expansion culture process is completed, and thereafter, the culture of the cells C is continued until a predetermined cell density is reached.
- the culture apparatus 100 can move from the curing culture process to the expansion culture process by the rotation operation of the base 2.
- the bottom surface of the flattened container 1 is flattened by the weight of the content liquid and is used as the culture surface.
- the bottom surface of the container 1 is not sufficiently flattened and the culture surface is If wrinkles or slack occur in the cells, cells accumulate in the portions, resulting in an excessive density, and cell migration is restricted, and there is a concern that the proliferation efficiency of the cells may be reduced.
- such a place where the cells accumulate may cause the cells to remain in the container when the cultured cells are collected.
- FIG. 17 shows an example in which the hole 11 provided in the container 1 is locked to the fixture 28 and the container 1 is pulled. It is not enough to prevent wrinkles and slack.
- the holes 11 formed at the four corners of the container 1 are locked to the fixtures 28 provided at the four corners of the base 2.
- a recess 28a is provided in the fixture 28, the hole 11 provided in the container 1 is engaged with the recess 28a, and the end of the container 1 is moved at the height of the recess 28a. It is preferable to hold.
- the arrangement and the number of the fixtures 28 are not particularly limited, and it is sufficient that two or more fixtures 28 are arranged to face each other at the peripheral edge of the base 2.
- the fixtures 28 are preferably erected at the four corners of the base 2, and when a relatively large container 1 is used, more fixtures 28 are erected. Is also preferable.
- one fixing tool 28 can be arranged at the center of the end on the short side of the base 2, one at the center of the end on one of the short sides, and two or more at the opposite end. You can also.
- the holes 11 drilled in the container 1 are provided corresponding to the arrangement and number of the fixtures 28 provided on the base 2, and the fixtures 28 are inserted into the holes 11 so that the peripheral edge of the holes 11 is recessed. It can be provided in a heat sealed end region or the like so that it can engage with 28a. That is, it is only necessary that two or more holes 11 are provided at the end of the container 1 corresponding to two or more fixtures 28 provided at the peripheral edge of the base 2. At this time, it goes without saying that the hole 11 is provided in the container 1 so that the sealing performance of the container 1 is not impaired.
- the shape of the fixture 28 is not particularly limited.
- it can be made into a substantially cylindrical shape, other shapes such as a substantially rectangular parallelepiped may be used.
- the upper part of the recessed part 28a can be made into a dome shape, and the lower part can be made into a columnar shape or a prism shape.
- the recess 28a is preferably formed in a circumferential shape with respect to the horizontal plane in the fixture 28, but is not limited thereto, and the semi-circular shape, arc shape, or the like with respect to the horizontal plane in the outer direction of the base 2. You may form in. Further, the horizontal cross section of the recess 28a is not limited to a circle, and may be a polygon or a star.
- the position where the recess 28a is formed in the fixture 28 is determined based on the thickness of the container 1 when the container 1 is full, assuming the thickness of the container 1 that is filled with the culture solution to the full capacity of the container 1. be able to.
- FIG. 15 shows that in the fixture 28, a concave portion 28a is formed at a position 1/2 of the thickness of the container 1 when full (approximately 1/2 of the liquid depth d) upward from the position of the surface of the base 2.
- the example which engaged the peripheral part of the hole 11 of the container 1 with this recessed part 28a is shown.
- the edge part of the container 1 is hold
- FIG. 16 shows that in the fixture 28, a concave portion 28a is formed at a position 3/4 of the thickness of the container 1 when full (approximately 3/4 of the liquid depth d) upward from the position of the surface of the base 2. And the example which engaged the peripheral part of the hole 11 of the container 1 with this recessed part 28a is shown. By doing in this way, the bottom face of container 1 can be made into a flat state by pulling up the edge part which counters in container 1 to the height of crevice 28a. Such an effect can be similarly obtained even when the position of the recess 28a is above the position of the surface of the base 2 and slightly above the thickness of the full container 1.
- the position where the recess 28a is formed in the fixture 28 may be set to a range of 1/2 to 3/2 of the thickness of the container 1 when the container 1 is full, from the surface position of the base 2 upward. Preferably, it is in the range of 1/2 to 1, more preferably in the range of 1/2 to 3/4.
- the bottom surface of the container 1 after shifting to the expansion culture process can be more reliably maintained in a flat state. It can be in a state without slack. For this reason, it becomes possible to maximize the culture area of the container 1.
- the bottom surface of the container 1 more flat, the cells can be uniformly distributed (dispersed) in the container 1. For this reason, it is possible to optimize the culture conditions in the cell culture, and to further improve the proliferation efficiency of the cells.
- the container 1 is held in a state in which the partition piece 3 protrudes from the base 2 in which the partition piece 3 that can protrude from the placement surface 20 at a predetermined height is embedded.
- the bottom surface of the container 1 is partially raised and partitioned into a plurality of compartments 10, the cell culture method according to the present invention can be implemented without being limited thereto.
- the deformation of the container 1 made of a flexible material can be used to partially bulge the bottom surface of the container 1 and partition it into a plurality of compartments 10, for example, a plurality of rod-shaped members can be placed on the mounting surface 20. You may make it arrange
- the pressing plate 23 is provided with annular rising pieces 25 that form elongated hole-shaped guide holes 24 at the four corners of the base 2, and the four corners of the pressing plate 23 are formed in the guide holes 24.
- the pressing plate 23 may be attached as shown in FIGS. 13 and 14 as long as it can be moved up and down in accordance with the content of the container 1.
- two pairs of rising pieces 25 a each having a long hole-shaped guide hole 24 a are erected so as to be paired at positions where the long sides of the base 2 are opposed to each other.
- a pressing plate 23 is attached so as to be movable up and down via a support bar 26a installed on each of the two.
- the hook F is locked to the support rod 26a inserted into the guide hole 24a to prevent the pressing plate 23 from moving upward, so that the pressing plate 23 fixed at the lower position has a predetermined content.
- the inside of the container 1 can be pressed by pressing the upper surface side of the container 1 (see FIG. 13). Further, in the expansion culture process, the pressing plate 23 can be moved upward by releasing the hook F.
- the pressing plate 23 cannot move above it and is fixed at the upper position.
- the medium M is additionally supplied, and the inside of the container can be pressurized by pressing the upper surface side of the container 1 whose inner volume is increased and the thickness is increased with the pressing plate 23 (see FIG. 14).
- the hook F is rotated by its weight due to the inclination of the base 2. You just have to do it.
- the present invention can be suitably used for gene therapy, immunotherapy, regenerative medicine, antibody drug production, etc. in which cells are cultured in a closed system aseptically and simply using a cell culture container.
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Abstract
Description
また、培養容器の移し替え作業が不要であり、培養液が同一の培養容器に留まることで、細胞へのダメージの低減、コンタミネーションのリスクの低減が可能となる。
まず、本実施形態に係る細胞培養方法について説明する。
本実施形態に係る細胞培養方法は、可撓性材料からなる容器1に、培養の対象となる細胞(培養細胞)Cとともに、この細胞Cを培養するための培地Mを供給して細胞培養を行う細胞培養方法であり、特に、患者から採取した細胞や凍結された細胞などのダメージを受けた細胞を養生して、細胞本来の機能を回復しつつ、培養するのに好適な細胞培養方法である。
なお、容器1の形状は、正方形状、楕円形状、円形状などとする場合もあり、必要に応じて種々の形状とすることができる。
さらに、容器1は、細胞培養の進行状況や細胞の状態などを確認できるように、一部又は全部が透明性を有しているのが好ましく、細胞をより効率的に増殖することができるように、低細胞毒性、低溶出性及び放射線滅菌適性を有しているのが好ましい。
なお、特に図示しないが、チューブ12は、容器1に取り付けられた管状のポートに接続するようにしてもよく、細胞や培地を容器1から回収する際の残液を低減できるように、容器1の収容部の形状をポートに向かって次第に狭くなるように形成することもできる。
具体的には、例えば、シリコーンゴム、軟質塩化ビニル樹脂、ポリブタジエン樹脂、エチレン-酢酸ビニル共重合体、塩素化ポリエチレン樹脂、ポリウレタン系熱可塑性エラストマー、ポリエステル系熱可塑性エラストマー、シリコーン系熱可塑性エラストマー、スチレン系エラストマー等を用いることができる。また、スチレン系エラストマーとしては、例えば、SBS(スチレン・ブタジエン・スチレン)、SIS(スチレン・イソプレン・スチレン)、SEBS(スチレン・エチレン・ブチレン・スチレン)、SEPS(スチレン・エチレン・プロピレン・スチレン)等を用いることができる。
これにより、細胞Cが培地Mに懸濁された状態で容器1に供給されると、その後、浮遊系細胞であるか足場依存性細胞であるかにかかわらず、細胞Cは容器1の底面に沈降するが、沈降した細胞Cが各区画10の培養面に集まることで、細胞密度が高められた状態で細胞Cを培養することができる。
なお、各区画10における培養面の面積は、培養する細胞Cの種類や接種濃度などに応じて、従前より継代培養に用いられてきたウェルプレート(例えば、24ウェルプレートなど)の各ウェルの底面積と同程度となるようにするのが好ましい。
すなわち、養生培養工程では、容器1の底面が、仕切片3によって押し上げられて撓んだ部分が載置面20から浮き上がるように隆起して、複数の区画10に仕切られているのは前述した通りであるが、仕切片3を基台2内に収容し、その上端面を載置面20と面一にして区画10を解消すると、当該部分が、内容液の重さによって平らにならされて培養面として利用できるようになり、その分だけ容器内の培養面積が拡大する。
このようにすることで、容器1の上下動による内容液の撹拌に加えて、容器1に加わる振動によって細胞Cが内容液中を舞い上がるように拡散する。これにより、容器1の内容液が上下方向にも効率よく攪拌され、容器1の内容液中の細胞Cの分布や培地Mの成分濃度を均一にして良好な培養環境を維持するとともに、細胞Cが容器内壁に付着したり、過度に凝集したりするのを抑制して、細胞Cの増殖を促進することができる。さらに、培養する細胞Cが接着性細胞である場合には、容器1に加わる振動により、容器1の培養面からの細胞Cの剥離を促すことも可能である。
次に、前述した細胞培養方法に用いるのに好適な本実施形態に係る細胞培養装置について説明する。
なお、図3は、本実施形態に係る細胞培養装置の概略を示す斜視図である。
なお、図6~図9は、本実施形態に係る細胞培養装置の動作を説明するための説明図であり、これらの図に示す断面は、図3のA-A断面に相当する。
これにより、前述した細胞培養方法の養生培養工程を行う準備が整う。
このようにすることで、容器1を培養装置100に取り付けた後に、押圧板23を図5に示す状態から元に戻して容器1に押し当てるとともに、押圧板23の短辺側の二辺にフック41,42を係止することで、載置面20上に保持された容器1の上面側を押圧板23で押圧して、容器内を加圧することができる。
すなわち、本実施形態では、基台2の回動軸が設けられた側とは反対側の短辺側に設けられた当接部材50に、上動してきた突き上げ部材5を当接させることによって、基台2を上方に回動させているところ、当接部材50には、梁状の当接片51が架設されている。そして、突き上げ部材5が当接部材50に当接して基台2を上方に回動させると、図7に示すように、かかる当接片51が一方のフック41の下側舌片41aに当接して当該フック41が回動し、これによって係止が解除されるようにしてある。そして、基台2をさらに上方に回動させると、図8に示すように、他方のフック42が基台2に押されるように回動して、かかるフック42の係止も解除されるようにしてある。
また、このような細胞の溜まった場所は、培養細胞の回収にあたって、容器内に細胞が残存する原因にもなりかねない。
しかしながら、この方法によっても、培養容器に培養液が入った状態では、培養容器の培養面にシワや弛みが生じ、その部分に細胞の溜まった場所が生じることによって、細胞の増殖効率が低下するという不具合を解消するには不十分である。
具体的には、図17に、容器1に設けられた孔11を固定具28に係止して、容器1を引っ張るようにした例を示すが、このようにしてもなお、容器1の底面にはシワや弛みが生じないようにするには不十分である。
このようにすることで、容器1の端部は、凹部28aの高さに保持されて、容器1の底面を平坦な状態にして容器1を基台2に固定することができる。
このようにすることで、容器1における対向する端部を、凹部28aの高さに引っ張り上げることで、容器1の底面を平坦な状態にすることができる。このような効果は、凹部28aの位置が、基台2の表面の位置から上方に、満杯の容器1の厚みよりもやや上方の位置にあっても同様に得ることができる。
固定具28に凹部28aを形成する位置を上記範囲とすることで、拡大培養工程に移行した後の容器1の底面を、より確実に平坦な状態に維持することができ、培養面をシワや弛みのない状態にすることができる。このため、容器1の培養面積を最大にすることが可能になる。
また、容器1の底面をより確実に平坦な状態にすることにより、容器1内において細胞を均一に分布(分散)させることができる。このため、細胞の培養における培養条件の最適化を図ることができ、細胞の増殖効率をより一層向上させることが可能となる。
このようにしても、容器1の底面は、棒状の部材によって押し上げられて部分的に隆起し、これによって、複数の区画10に仕切られる。そして、かかる棒状の部材を引き抜けば、内容液の重さによって容器1の底面が平らにならされて、容器内の培養面積が拡大する。
また、拡大培養工程では、フックFの係止を解除することで、押圧板23が上動できるようにする。そして、支持棒26aがガイド孔24aの上縁に達すると、押圧板23は、それよりも上には動くことができなくなって上方位置に固定される。これによって、培地Mが追加供給され、内容量が増加して厚みが増した容器1の上面側を押圧板23で押圧して、容器内を加圧できるようにしてある(図14参照)。
なお、フックFの係止を解除するには、前述した実施形態と同様にして基台2の回動動作を行ったときに、基台2の傾きによって、フックFがその重さで回動するようにすればよい。
10 区画
11 孔
2 基台
20 載置面
23 押圧板
24 ガイド孔
25 環状立ち上り片
26 ピン
28 固定具
28a 凹部
3 仕切片
4 支持フレーム
41,42 フック
C 細胞
M 培地
Claims (16)
- 可撓性材料からなる容器に、細胞とともに培地を供給して細胞培養を行う細胞培養方法であって、
前記容器の底面を部分的に隆起させて複数の区画に仕切り、前記区画ごとに前記細胞を培養し、しかる後に、前記区画を解消することによって、前記容器内の培養面積を拡大することを特徴とする細胞培養方法。 - 平面状の載置面を有し、前記載置面から所定の高さで突出可能な仕切片が埋設された基台に前記容器を保持し、
前記載置面から突出する前記仕切片によって、前記容器の底面を部分的に隆起させて複数の区画に仕切る請求項1に記載の細胞培養方法。 - 前記仕切片を前記基台内に収容し、前記仕切片の上端面を前記載置面と面一とすることによって、前記区画を解消する請求項2に記載の細胞培養方法。
- 前記区画を解消することによって、前記容器内の培養面積を拡大して細胞培養を継続するにあたり、
前記容器を初期位置よりも上方に移動させた後に、前記容器を初期位置まで戻すとともに、初期位置に戻った前記容器に振動を加えることによって、前記容器の内容液を撹拌する請求項1~3のいずれか一項に記載の細胞培養方法。 - 上下動可能に取り付けられた押圧板を下方位置に固定して、当該押圧板により、所定の内容量に調整された前記容器を押圧して容器内を加圧した状態で細胞培養を行い、
しかる後に、前記容器に培地を追加供給するとともに、前記押圧板を上方位置で固定して、当該押圧板により、内容量が増加した前記容器を押圧して容器内を加圧した状態で細胞培養を継続する請求項1~4のいずれか一項に記載の細胞培養方法。 - 可撓性材料からなる容器に、細胞とともに培地を供給して細胞培養を行う細胞培養装置であって、
前記容器を保持する平面状の載置面を有する基台を備え、
前記載置面から所定の高さで突出可能な仕切片が前記基台に埋設され、
前記仕切片を前記基台内に収容したときに、前記仕切片の上端面が前記載置面と面一になることを特徴とする細胞培養装置。 - 前記基台が、前記載置面を形成する保持部材と、前記仕切片が一定の間隔で平行に複数立設されている仕切板とを備える請求項6に記載の細胞培養装置。
- 前記基台が、支持フレームに回動可能に軸支されており、
前記基台の回動動作により、前記容器を初期位置よりも上方に移動させた後に、前記容器を初期位置まで戻すとともに、初期位置に戻った前記容器に振動を加えて前記容器の内容液を撹拌する請求項6又は7に記載の細胞培養装置。 - 前記基台に、前記載置面上に保持された前記容器を押圧して容器内を加圧するための押圧板が、前記容器の内容量に応じて上下動可能に取り付けられた請求項6~8のいずれか一項に記載の細胞培養装置。
- 前記基台の四隅に、長穴状のガイド孔を形成する環状立ち上り片を立設し、前記ガイド孔に、前記押圧板の四隅に突設されたピンを挿通することによって、前記押圧板を上下動可能に取り付けるとともに、
前記押圧板に係止され、前記押圧板を所定位置に固定するフックが設けられた請求項9に記載の細胞培養装置。 - 前記基台が、支持フレームに回動可能に軸支されており、
前記基台の回動動作により前記フックの係止が解除される請求項10に記載の細胞培養装置。 - 前記基台の周縁部に、前記容器を固定する二個以上の固定具が対向して立設され、前記固定具に凹部が形成された請求項6~11のいずれか一項に記載の細胞培養装置。
- 前記凹部が、前記固定具において、前記基台の表面の位置から上方に、満杯時の前記容器の厚みの1/2~3/2の位置に形成された請求項12に記載の細胞培養装置。
- 前記凹部が前記固定具に水平面に対して円周状に形成されたことを特徴とする請求項12又は13に記載の細胞培養装置。
- 前記基台の四隅に前記固定具が立設されたことを特徴とする請求項12~14のいずれか一項に記載の細胞培養装置。
- 前記容器の端部に二個以上の孔が前記固定具に対応して設けられ、前記固定具を前記孔に挿入して前記孔の周縁部を前記凹部に係合したことを特徴とする請求項12~15のいずれか一項に記載の細胞培養装置。
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JP7035343B2 (ja) | 2017-06-15 | 2022-03-15 | 東洋製罐グループホールディングス株式会社 | 細胞培養方法及び装置 |
WO2019138956A1 (ja) * | 2018-01-09 | 2019-07-18 | 東洋製罐グループホールディングス株式会社 | 細胞培養方法及び装置 |
JP2019118319A (ja) * | 2018-01-09 | 2019-07-22 | 東洋製罐グループホールディングス株式会社 | 細胞培養方法及び装置 |
JP7102734B2 (ja) | 2018-01-09 | 2022-07-20 | 東洋製罐グループホールディングス株式会社 | 細胞培養方法及び装置 |
WO2020149246A1 (ja) * | 2019-01-18 | 2020-07-23 | 東洋製罐グループホールディングス株式会社 | 培養容器、培養方法、及び培養装置 |
JP2020114191A (ja) * | 2019-01-18 | 2020-07-30 | 東洋製罐グループホールディングス株式会社 | 培養容器、培養方法、及び培養装置 |
JP7348586B2 (ja) | 2019-01-18 | 2023-09-21 | 東洋製罐グループホールディングス株式会社 | 培養容器、培養方法、及び培養装置 |
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TW201639952A (zh) | 2016-11-16 |
KR20170093245A (ko) | 2017-08-14 |
US20200318057A1 (en) | 2020-10-08 |
CN107208030B (zh) | 2020-12-18 |
EP3252140A4 (en) | 2018-09-26 |
TWI691594B (zh) | 2020-04-21 |
EP3252140A1 (en) | 2017-12-06 |
US11390842B2 (en) | 2022-07-19 |
EP3252140B1 (en) | 2022-03-02 |
KR101984074B1 (ko) | 2019-05-30 |
US20170362559A1 (en) | 2017-12-21 |
US10731122B2 (en) | 2020-08-04 |
CN107208030A (zh) | 2017-09-26 |
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