JP7299437B1 - Culture system - Google Patents

Abstract

A culture system capable of producing sufficiently grown cell aggregates is provided. SOLUTION: A culture system for forming cell aggregates by liquid culture, comprising a culture unit containing a liquid and having an outlet for discharging the liquid and an inlet for introducing the liquid, an outlet and an inlet. and at least one of the culture section and the pathway section, and at least one of the monitoring section capable of monitoring the components in the liquid and/or the properties of the liquid, and the culture section and the pathway section, An adjustment unit capable of adjusting the components in the liquid and/or properties of the liquid, and a control unit capable of controlling the adjustment unit based on the monitoring result of the monitoring unit. [Selection diagram] Fig. 1

Description

The present invention relates to culture systems.

A system for culturing cells is known (see Patent Document 1, for example).

WO2013/161885

The conventional cell culture system described above is premised on the use of a filter that allows the passage of the cell culture solution but does not allow the passage of cells and cell aggregates. For this reason, cells and cell aggregates may be locally pressed against the filter, damaging or dividing the cells and cell aggregates.

The present invention has been made in view of the above points. The object is to provide a culture system capable of growing cell aggregates accurately.

A feature of the culture system according to the present invention is that
A culture system for forming cell aggregates by liquid culture,
a culturing unit containing a liquid and having an outlet for drawing out the liquid and an inlet for introducing the liquid;
a path part that enables fluid communication between the outlet and the inlet;
a monitoring unit capable of monitoring a component in the liquid and/or properties of the liquid in at least one of the culturing unit and the path unit;
an adjustment unit capable of adjusting the components in the liquid and/or the properties of the liquid in at least one of the culture unit and the path unit;
a control unit capable of controlling the adjustment unit based on the monitoring result of the monitoring unit;
a stirring unit for stirring the liquid in the culture unit,
The control unit controls the stirring unit based on predetermined stirring conditions,
The liquid culture is a suspension culture in which cells in a liquid are suspended by agitation by the agitator,
The control unit controls the adjustment unit to make the amount of liquid in the culture unit larger than the amount of liquid at the start of culture based on the progress of culture,
The control unit alternately performs first stirring control and second stirring control different from the first stirring control when the amount of liquid in the culturing unit is the amount of liquid at the start of the culturing. performing a first process of switching to control the stirring unit;
The outlet is higher than the liquid level at the start of the culture .

Cell aggregates can be grown precisely.

1 is a block diagram showing an overview of a culture system 1; FIG. 1 is a block diagram showing details of a culture system 1-1 according to a first embodiment; FIG. FIG. 10 is a block diagram showing details of a culture system 1-2 according to a second embodiment; FIG. FIG. 11 is a schematic diagram showing positions of an inlet 227-2 and an outlet 231-2 in a culture vessel 110-2. 3 is a block diagram showing various sensors included in a monitoring device 300-2; FIG. 5 is a time chart showing an outline of processing of the culture system 1-2; FIG. 4 is a schematic diagram showing the state of cell aggregates grown by the treatment of culture system 1-2. FIG. 11 is a block diagram showing details of a culture system 1-3 according to a third embodiment; FIG. 4 is a time chart showing an outline of processing of the culture system 1-3;

<<<<Overview of culture system 1>>>>
A culture system 1 is a culture system for culturing cells. Specifically, the culture system 1 is a system that grows cells and forms cell aggregates with the cells. It should be noted that not only the cells are sequentially aggregated, but also some of the cells once aggregated may be separated. As a whole, it suffices if a cell aggregate with a desired size can be finally formed. It should be noted that the cell aggregates may not be too large. It is preferably large enough to supply nutrients to the cells inside the cell aggregate.

<<<Cell>>>
Cells are objects to be cultured by the culture system 1 . By culturing cells, the cells are divided to increase the number of cells. Cells come into contact with each other to form cell aggregates (cell aggregates). The culture system 1 is a system for growing cells to form cell aggregates.

Cells are not particularly limited as long as they form cell aggregates in a medium. Cells are preferably of mammalian origin, preferably from species commonly used in research such as humans, primates such as monkeys, or mice. Examples of cells include cells used in regenerative medicine research and cells used as cell preparations, specifically pluripotent stem cells such as ES cells and iPS cells, nephron progenitor cells, ureters Examples include various progenitor cells such as blast cells and stromal progenitor cells, and various stem cells such as mesenchymal stem cells, neural stem cells and adipose stem cells. The cells may be cells derived from pluripotent stem cells, immortalized cells or cell lines, or primary cultured cells isolated from tissue. In addition, depending on the purpose, it may be a normal cell, or a cell having a disease, genetic abnormality, or transgene.

<<<Medium>>>
The medium used in the culture system 1 includes a new medium and a circulation medium. A new medium is a medium newly supplied to a culture container 110-1 (reactor) or the like, which will be described later. The circulating medium is a medium that has been circulated for circulation or disposal out of the medium that has already been supplied to the culture container 110-1 or the like and used for culturing.

An appropriate medium can be selected and used depending on the cells, and is not particularly limited. In addition, conventionally known materials and additives useful for cell culture can be used as appropriate. Examples of basal media include DMEM, DMEMHG, EMEM, IMDM (Iscove's Modified Dulbecco's Medium), GMEM (Glasgow's MEM), RPMI-1640, α-MEM, Ham's Medium F-12, Ham's Medium F-10, Ham's Medium F12K・··and so on. Additives such as amino acids, vitamins, inorganic salts, proteins (growth factors), glucose, antibiotics, signal transduction inhibitors, reducing agents, and buffers are preferably added. Furthermore, serum (preferably serum derived from mammals (eg, fetal bovine serum, human serum, etc.)) may be added. Supplements can also be used as an alternative to serum.

<<<cell suspension>>>
A cell suspension is a system in which cells or cell aggregates are dispersed in a medium. The culture container 110-1 stores cells, cell aggregates, and medium as a cell suspension.

<<<Stir>>>
Agitation means displacing cells, cell clumps, or medium in a cell suspension. Agitation displaces the cells and cell aggregates along with the displacement of the medium. Mainly, cells and cell aggregates are also displaced with the displacement of the medium (convection). In addition, the operation for the cell suspension is not limited to stirring but may be shaking or the like as long as the cells can be displaced.

<<< Convection >>>
Convection refers to a phenomenon in which cells or cell aggregates are carried by medium flow.

<<<Floating>>>
Floating mainly means a state in which cells or cell aggregates are not in contact with the wall surface of a culture vessel (for example, a culture vessel 110-1 to be described later). The walls of the culture vessel are all surfaces with which cells or cell clumps may come into contact. For example, when the culture vessel has a cylindrical or prismatic shape, the wall surface is the inner surface of the bottom surface and side surfaces. When the culture vessel has a spherical shape, it is the inner surface of the spherical surface. Floating also includes a state in which even when cells or cell aggregates are partially in contact with the wall surface of the culture container, they can be easily separated from the wall surface by displacing the culture medium.

<<<shear stress>>>
Shear stress refers to the stress resulting from the difference in relative displacement between the displacing medium and the cells or cell aggregates.

<<< Aggregation >>>
Aggregation means that cells gather together to form a large clump. Even when aggregated once, cells or small aggregates may be separated due to shear stress or the like during the culture process. Even if there is a case where the cells are separated, it is sufficient that the cells can be cultured so that the cell aggregates become large eventually. It should be noted that the size of the cell aggregate does not matter. A state in which at least two cells aggregate together is included in a cell aggregate. A state in which cells aggregate with each other may be referred to as a cell aggregate.

<<<<Configuration of culture system 1>>>>
FIG. 1 is a block diagram showing the outline of the configuration of the culture system 1. As shown in FIG.

<<First Aspect of Culture System 1>>
According to the first aspect of the culture system 1,
A culture system 1 for forming cell aggregates by liquid culture,
a culture unit 10 containing a liquid and having an outlet port 12 for leading out the liquid and an inlet port 14 for introducing the liquid;
a path portion 20 that enables liquid communication between the outlet port 12 and the inlet port 14;
a monitoring unit 30 capable of monitoring the components in the liquid and/or the properties of the liquid in at least one of the culture unit 10 and the path unit 20;
an adjustment unit 40 capable of adjusting the components in the liquid and/or the properties of the liquid in at least one of the culture unit 10 and the path unit 20;
and a control unit 50 capable of controlling the adjustment unit 40 based on the monitoring result of the monitoring unit 30 is provided.

The culture system 1 is a system for forming cell aggregates by liquid culture. The culture system 1 is
a culture unit 10;
a path section 20;
a monitoring unit 30;
an adjustment unit 40;
a control unit 50;
Prepare.

<Culturing unit 10>
The culture unit 10 contains liquid. The culture section 10 has an outlet 12 and an inlet 14 . The outlet port 12 is a port through which the liquid is led out from the culture section 10 . The introduction port 14 is a port for introducing liquid into the culture section 10 .

<Liquid>
The liquid may be a fluid medium that can be accommodated in the culture unit 10, discharged from the outlet port 12, and introduced from the inlet port . For example, the liquid can be a culture medium, a cell suspension, or the like.

<Pathway part 20>
The passage portion 20 allows liquid communication between the outlet port 12 and the inlet port 14 . Path portion 20 communicates outlet 12 and inlet 14 . The passage portion 20 allows liquid to flow between the outlet 12 and the inlet 14 .

<Monitoring unit 30>
The monitoring unit 30 can monitor components in the liquid and/or properties of the liquid. The monitoring unit 30 can monitor at least one of the components in the liquid and the properties of the liquid. The monitoring unit 30 can monitor components in the liquid and properties of the liquid in at least one of the culture unit 10 and the path unit 20 .

<Adjuster 40>
The adjustment unit 40 can adjust the components in the liquid and/or the properties of the liquid. The adjustment unit 40 can adjust at least one of the components in the liquid and the properties of the liquid. The adjusting section 40 can adjust the components in the liquid and the properties of the liquid in at least one of the culturing section 10 and the path section 20 .

<Control unit 50>
The control unit 50 can control the adjusting unit 40 based on the monitoring result of the monitoring unit 30. FIG.

The components in the liquid and the properties of the liquid are monitored, and the components in the liquid and the properties of the liquid are adjusted based on the monitoring results, so cells can be grown accurately to form cell aggregates.

<<Second Aspect of Culture System 1>>
A second aspect of the culture system 1 is, in the first aspect,
further comprising a stirring unit 60 for stirring the liquid in the culture unit 10,
The control section 50 controls the stirring section 60 based on predetermined stirring conditions.

<<Third Aspect of Culture System 1>>
A third aspect of the culture system 1 is, in the second aspect,
The liquid culture is suspension culture in which cells are suspended in a liquid by agitation by the agitator 60 .

<<Fourth Aspect of Culture System 1>>
A fourth aspect of the culture system 1 is, in the second aspect,
The stirring section 60 has a movable body 62 that causes the liquid to flow.

<<Fifth Aspect of Culture System 1>>
A fifth aspect of the culture system 1 is, in the second aspect,
The stirring section 60 has a shaking mechanism 64 that shakes the culture section 10 .

<<Sixth Aspect of Culture System 1>>
A sixth aspect of the culture system 1 is, in the second aspect,
The predetermined stirring conditions are predetermined conditions based on cell nucleation and cell aggregate size.

As described above, the monitoring unit 30 monitors at least one of the components in the liquid and the properties of the liquid. As a result of monitoring, the monitoring unit 30 outputs various types of information such as at least one property information, at least one component information, and size information regarding the size of cell aggregates. Predetermined stirring conditions are determined based on various information output from the monitoring unit 30 .

For example, the monitoring unit 30 has an imaging unit 32 that images cell aggregates, as described later. The imaging unit 32 outputs size information that can determine the size of the cell aggregate. The control unit 50 acquires the size information output by the monitoring unit 30 . The control unit 50 can determine the size of the cell aggregate from the size information. The controller 50 determines predetermined stirring conditions based on the size of the cell aggregates. For example, the stirring speed is determined according to the size of the cell aggregates.

<Stirring unit 60>
The culture system 1 further includes a stirring section 60 . The stirring section 60 stirs the liquid in the culture section 10 . The stirring section 60 stirs the liquid in the culture section 10 under predetermined stirring conditions. The control unit 50 controls and operates the stirring unit 60 so as to satisfy predetermined stirring conditions.

The stirring section 60 may have a movable body 62 that causes the liquid to flow. The stirring section 60 may have a shaking mechanism 64 that shakes the culture section 10 . The agitating unit 60 may be any unit that fluctuates (vibrates, displaces, etc.) the liquid in order to properly form cell aggregates.

Predetermined stirring conditions are conditions for appropriately forming cell aggregates. Note that the predetermined stirring conditions differ depending on the stage of culture. Predetermined stirring conditions increase the possibility of cells coming into contact with each other, disperse the formed cell aggregates so as not to adhere to each other (enlarge), and increase the shear stress applied to the formed cell aggregates. It is a condition to prevent it from happening. By setting the predetermined stirring conditions in this way, first, the possibility of cells coming into contact with each other can be increased, making it easier to form cell aggregates. Furthermore, by appropriately dispersing the formed cell aggregates, it is possible to prevent the cell aggregates from adhering to each other (enlarging). Furthermore, by preventing the shear stress applied to the cell aggregates from becoming large, it is possible to prevent the formed cell aggregates from being split.

Predetermined agitation conditions are predetermined based on cell nucleation and cell clump size. The predetermined stirring conditions can be different from each other depending on the degree of cell nucleation and the size of the cell aggregates. Appropriate stirring conditions can be set according to the growth of cell aggregates. Predetermined stirring conditions are determined in advance by preliminary experiments or the like, and stored in an auxiliary storage device or the like (not shown). The control unit 50 reads predetermined stirring conditions from the auxiliary storage device and controls the stirring unit 60 .

The monitoring unit 30 outputs various types of information such as at least one piece of property information, at least one piece of component information, and size information about the size of cell aggregates. Predetermined stirring conditions are determined based on various information output from the monitoring unit 30 . For example, the monitoring unit 30 has an imaging unit 32 that images cell aggregates, as described later. The imaging unit 32 outputs size information that can determine the size of the cell aggregate. The monitoring unit 30 also measures the concentration of glucose and lactic acid by optical analysis such as Raman spectroscopy. The control unit 50 acquires the size information output by the monitoring unit 30 . The control unit 50 can determine the size of the cell aggregate from the size information. The controller 50 determines predetermined stirring conditions based on the size of the cell aggregates. For example, when the size of the cell aggregate exceeds a predetermined size, the stirring speed is determined according to the size of the cell aggregate.

<<Seventh Aspect of Culture System 1>>
A seventh aspect of the culture system 1 is, in the first to sixth aspects,
A constant temperature bath 80 capable of containing at least a part of the culturing unit 10 and the path unit 20 is further provided.

<Constant temperature bath 80>
The constant temperature bath 80 can accommodate at least a portion of at least one of the culture section 10 and the path section 20 . By housing the culture unit 10 and the path unit 20 in the constant temperature bath 80, cell aggregates can be formed in a stable environment. Note that the constant temperature bath 80 may not be used if the cell aggregates can be formed in a stable environment.

<<Eighth aspect of culture system 1>>
An eighth aspect of the culture system 1 is, in the first to seventh aspects,
An external heater 82 capable of heating the liquid in the culture section 10 and the path section 20 from the outside is further provided.

<External heater 82>
The external heater 82 can heat the liquid in the culture section 10 and the liquid in the path section 20 from the outside. Warming the liquid with an external heater 82 provides a suitable environment for the formation of cell clumps.

<<Ninth Aspect of Culture System 1>>
A ninth aspect of the culture system 1 is, in the first to eighth aspects,
The outlet port 12 is higher than the liquid level at the start of culture.

At the start of culturing, outlet port 12 is higher than the liquid level of the liquid contained in culturing section 10 . In other words, the liquid is stored in the culture section 10 so that the liquid level is lower than the outlet port 12 at the time of starting the culture.

A filter, physical mechanism, or the like can prevent ungrown cells or small cell aggregates from being discharged from outlet 12 .

<<Tenth Aspect of Culture System 1>>
A tenth aspect of the culture system 1 is, in the first to ninth aspects,
The monitoring unit 30 can output at least one property information among information on the temperature of the liquid, information on the hydrogen ion concentration of the liquid, and information on the dissolved oxygen concentration in the liquid as the information on the properties of the liquid. and
The control unit 50 acquires the at least one property information output from the monitoring unit 30 .

<Information on properties of liquid (property information)>
Information about liquid properties includes, for example,
information about the temperature of the liquid,
Information about the hydrogen ion concentration of liquids,
For example, there is information on the dissolved oxygen concentration in liquids.

<Control of control unit 50>
The monitoring unit 30 can output at least one of these pieces of property information. The property information output from the monitoring unit 30 is supplied to the control unit 50 . The control unit 50 can acquire at least one of these property information. The monitoring unit 30 can control the adjusting unit 40, the stirring unit 60, and the like using at least one property information acquired.

<<Eleventh Aspect of Culture System 1>>
An eleventh aspect of the culture system 1 is, in the first to tenth aspects,
The monitoring unit 30 is capable of outputting at least one component information among information on electrolytes, information on amino acids, information on glucose, and information on lactic acid as information on components in the liquid,
The control unit 50 acquires the at least one component information output from the monitoring unit 30 .

The monitoring unit 30 may output information on ammonia as information on components in the liquid.

<Information on components in the liquid>
Information about components in the liquid (component information) includes, for example,
Information on electrolytes Information on amino acids Information on glucose Information on lactic acid, etc.

<Control of control unit 50>
The monitoring unit 30 can output at least one component information out of these pieces of information. The component information output from the monitoring section 30 is supplied to the control section 50 . The control unit 50 can acquire at least one of these component information. The monitoring unit 30 can control the adjustment unit 40, the stirring unit 60, and the like using the acquired at least one component information.

<<Twelfth Aspect of Culture System 1>>
A twelfth aspect of the culture system 1 is, in the first to eleventh aspects,
The monitoring unit 30 is capable of outputting size information regarding the size of cell aggregates in the culture unit 10,
The control section 50 acquires the size information output from the monitoring section 30 .

The monitoring unit 30 can output size information regarding the size of cell aggregates present in the culture unit 10 . The size information output from the monitoring section 30 is supplied to the control section 50 . The control unit 50 can acquire size information. The monitoring unit 30 can control the adjusting unit 40, the stirring unit 60, and the like using the acquired size information.

<<Thirteenth Aspect of Culture System 1>>
A thirteenth aspect of the culture system 1 is, in the twelfth aspect,
The monitoring unit 30 has an imaging unit 32 that images the cell aggregates in the culture unit 10,
The control unit 50 acquires the size of the cell aggregate from the imaging data of the cell aggregate as the size information.

The monitoring unit 30 has an imaging unit 32 . The imaging unit 32 images the cell aggregates in the culture unit 10 . The imaging unit 32 can image not only the cell aggregates but also the liquid together with the cell aggregates. The imaging unit 32 outputs size information. The size information can be imaging data obtained by imaging a cell aggregate or the like by the imaging unit 32 . The size information may be any information that includes data that can determine the size of the cell aggregate.

The control unit 50 acquires the size information output by the monitoring unit 30 . The control unit 50 performs various image processing on the obtained size information to determine the size of the cell aggregate. For example, the outline of the cell aggregate can be extracted by various types of image processing, and the size of the cell aggregate can be determined.

In addition, the control unit 50 performs machine learning in advance using various imaging data obtained by imaging the culture unit 10 and actual measurement values of the size of cell aggregates corresponding to each of these imaging data as teacher data. , the size of the cell aggregate may be determined by referring to the learning result from the imaging data.

In addition, when the imaging unit 32 has a function capable of executing various image processing and various arithmetic processing (for example, a smart camera), the imaging unit 32 can determine the size of the cell aggregate from the imaging data. can be determined and output. In this case, the size information is information indicating the size of the cell aggregate. The control unit 50 can directly acquire the size of the cell aggregate.

<<Fourteenth Aspect of Culture System 1>>
A fourteenth aspect of the culture system 1 is, in the first to thirteenth aspects,
The adjusting unit 40 has a component applying unit 42 for applying necessary components to the liquid and/or a component removing unit 44 for removing unnecessary components from the liquid,
The control unit 50 controls the component applying unit 42 and/or the component removing unit 44 based on the monitoring result of the monitoring unit 30 to adjust the components in the liquid and/or the properties of the liquid.

The adjusting section 40 has a component applying section 42 and/or a component removing section 44 . The adjusting section 40 has at least one of a component applying section 42 and a component removing section 44 . The component application unit 42 provides necessary components to the liquid. The component removing section 44 removes unnecessary components from the liquid.

The control unit 50 controls the component adding unit 42 and the component removing unit 44 based on the monitoring result output by the monitoring unit 30 . By controlling the component applying unit 42 and the component removing unit 44, the components in the liquid and the properties of the liquid can be adjusted. By adjusting the components in the liquid and the properties of the liquid, the environment of the culture section 10 can be made suitable for the growth of cell aggregates.

<<Fifteenth Aspect of Culture System 1>>
A fifteenth aspect of the culture system 1 is, in the first to fourteenth aspects,
The adjustment unit 40 has a gas exchange membrane 46 capable of supplying gas components necessary for culture to the liquid.

The adjustment unit 40 has a gas exchange membrane 46 (for example, a gas exchange module 416-1 to be described later). The gas exchange membrane 46 can supply gaseous components necessary for culture to the liquid. By supplying the gaseous components necessary for culture, the environment of the culture section 10 can be made suitable for the growth of cell aggregates.

<<Sixteenth Aspect of Culture System 1>>
A sixteenth aspect of the culture system 1 according to the fifteenth aspect,
The gas exchange membrane 46 is a hollow fiber gas exchange membrane containing any one of silicone, polypropylene, polytetrafluoroethylene and polymethylpentene.

Since a hollow fiber gas exchange membrane is used, it is possible to use the system for a long period of time with a homogeneous membrane that is less prone to clogging, and the size of the system can be reduced.

<<Seventeenth Aspect of Culture System 1>>
A seventeenth aspect of the culture system 1 is, in the first to sixteenth aspects,
The adjustment part 40 has a dialysis membrane.

Since the adjustment unit 40 has a dialysis membrane (for example, a dialysis module 412-1 and a dialysis module 472-3, which will be described later), it continuously corrects the composition of nutrients and metabolites and reuses growth factors. to condition the medium and keep it in use for an extended period of time.

<<Eighteenth Aspect of Culture System 1>>
An eighteenth aspect of the culture system 1 is, in the first to seventeenth aspects,
The control unit 50 controls the adjustment unit 40 based on the monitoring result of the monitoring unit 30 to add a pH adjuster to the liquid to adjust the hydrogen ion concentration of the liquid.

The hydrogen ion concentration can be maintained within a range suitable for cell culture. An appropriate range of hydrogen ion concentration varies depending on the type of cell, and in mammalian-derived cells, it is preferable to control the pH to, for example, 7.2 or more and 7.4 or less.

<<Nineteenth Aspect of Culture System 1>>
A nineteenth aspect of the culture system 1 is, in the first to eighteenth aspects,
The monitoring unit 30 can further output information on the carbon dioxide concentration in the gas in contact with the liquid,
The control unit 50 controls the adjustment unit 40 based on the information on the carbon dioxide concentration from the monitoring unit 30 to supply carbon dioxide to adjust the hydrogen ion concentration of the liquid.

By also using information about the carbon dioxide concentration, the environment for culturing cells can be maintained accurately.

<<Twentieth Aspect of Culture System 1>>
A twentieth aspect of the culture system 1 is, in the first to nineteenth aspects,
The adjustment unit 40 has a flow rate adjustment unit 48 that adjusts the flow rate of each component for adjustment,
The control section 50 controls the flow rate adjusting section 48 based on the monitoring result of the monitoring section 30 .

The adjuster 40 has a flow rate adjuster 48 . The flow rate adjusting unit 48 adjusts the flow rate of each component for adjustment. The flow rate adjusting unit 48 can be, for example, a valve, a pump, or the like. The pump may be any type as long as the flow rate can be adjusted. For example, a roller pump, a reciprocating pump, a centrifugal pump, a propeller pump, or the like can be used. The flow rate can be adjusted by the frequency of opening and closing the valve. The flow rate can be adjusted by the number of rotations of the pump, the frequency of driving the pump, and the like. The flow rate adjuster 48 can adjust the flow rate separately for each component. Since the flow rate can be adjusted for each component, the components necessary for the growth of cell aggregates can be supplied to the culture section 10 in just the right amount.

<<21st Aspect of Culture System 1>>
A twenty-first aspect of the culture system 1 is, in the first to twentieth aspects,
The adjustment section 40 has a body section 86 and a panel 84 that can be attached to and detached from the body section 86 .

The body portion 86 is mainly a part or member that is fixedly installed or arranged. The body portion 86 has a housing and the like (not shown). An outer surface portion of the housing of the main body portion 86 has a hook member such as a hook. The panel 84 is latched or locked on the latching member. The panel 84 can be removed from or attached to the body portion 86 . The panel 84 may be detachable at a fixed position of the main body 86, and various locking mechanisms such as a magnet can be used in addition to a mechanical mechanism such as a hook.

<Main body portion 86 and non-wetted portion>
The adjustment portion 40 has a non-wetted portion and a wetted portion. The non-wetted parts are mainly parts and members that do not come into contact with the flowing liquid. For example, the liquid non-wetted parts include an electric motor for operating a pump for causing the liquid to flow, a drive circuit for driving the electric motor, liquid reservoirs 42a and 44a (for example, tanks, etc.) for reservoiring the liquid. ) and cooling devices for cooling the reservoir. Parts and members constituting the non-wetted portion are housed or installed in the body portion 86 . The liquid reservoirs 42a and 44a will be described later.

<Panel 84 and Wetted Part>
The wetted parts are mainly parts and members that come into contact with the flowing liquid. For example, the liquid-contacting part includes the above-described component applying part 42, component removing part 44, gas exchange membrane 46, dialysis membrane, etc., in addition to the circulation pipe and the supply pipe. The wetted parts are mainly composed of parts and members treated as consumables. The panel 84 is attached with parts and members that constitute the wetted portion. By providing it on the panel 84, it is possible to easily and simply replace parts and members related to the adjustment section 40. FIG.

Specifically, of the members and parts used in the adjustment unit 40 , the members and parts that come into contact with the liquid (requiring sterilization) are arranged on the detachable panel 84 . In particular, members and parts treated as consumable parts and disposable parts such as circulation pipes, supply pipes, and connectors for connecting these are provided on the panel 84, and these members and parts are mounted on the panel 84. By providing it in advance, it is possible to quickly and easily replace the panel 84 or the like. A module such as an oxygen supply module may be provided on the panel 84 in consideration of replacement frequency.

Parts such as piping and connectors are placed in the panel 84 pre-connected to each other. By doing so, parts such as piping and connectors can be formed in advance on the panel 84 so as to be able to communicate with the pumps and valves.

In the panel 84, a plurality of parts such as pipes and connectors can be arranged so as not to interfere with each other, and workability can be improved. Furthermore, since it is easy to visually recognize the states of a plurality of parts, it is possible to easily recognize the need for replacement or the like.

Note that the size and shape of the panel 84 are not limited. The panel 84 can be mounted with a plurality of parts such as piping and connectors, and can be detachable from other members such as pumps and valves.

<<Twenty-Second Aspect of Culture System 1>>
A twenty-second aspect of the culture system 1 is, in the first aspect to the twenty-first aspect,
A waste section 70 capable of discharging liquid from the path section 20 is further provided.

Since the liquid can be discharged to the disposal unit 70, the components in the liquid contained in the culture unit 10 and the properties of the liquid can be adjusted only to those necessary for the growth of cell aggregates. It is possible to appropriately adjust the amount of liquid contained in the culture section 10 .

<<23rd Aspect of Culture System 1>>
A twenty-third aspect of the culture system 1 is, in the twenty-second aspect,
further comprising a discharge mechanism 72 for discharging the liquid from the path portion 20 to the disposal portion 70,
The control unit 50 controls the discharge mechanism 72 to cause the liquid in the culture unit 10 to flow to the path unit 20 as circulation priming, and then to discharge to the disposal unit 70 . Circulation priming is a process for co-washing the path part 20 and filling the path part 20 with a medium. Furthermore, when having various modules such as a gas exchange module, a dialysis module, and an oxygenation module, the modules can also be co-washed by circulation priming.

Since the liquid in the culture section 10 is made to flow to the path section 20 and discharged as circulation priming, the liquid in the culture section 10 can be effectively utilized.

<<24th Aspect of Culture System 1>>
A twenty-fourth aspect of the culture system 1 is, in the first to twenty-third aspects,
The control unit 50 controls the components in the liquid and/or the properties of the liquid to a predetermined value or within a predetermined range based on the monitoring result of the monitoring unit 30 .

The cell aggregates can continue to grow appropriately depending on the degree of growth of the cell aggregates and the state of the liquid.

<<25th Aspect of Culture System 1>>
A twenty-fifth aspect of the culture system 1 is, in the first to twenty-fourth aspects,
The control unit 50 controls the adjusting unit 40 to increase the amount of liquid in the culturing unit 10 from the amount of liquid at the start of culturing based on the progress of culturing.

Since the amount of the liquid is determined according to the size of the cells and the degree of growth of the cell aggregates, the cells and cell aggregates are prevented from being drawn out of the culture unit 10, and the cells and cell aggregates are kept in the culture unit 10. They can stay inside and grow cell clumps.

<<26th Aspect of Culture System 1>>
A twenty-sixth aspect of the culture system 1 according to the twenty-fifth aspect,
The control unit 50 is
When the amount of liquid in the culture unit 10 is the amount of liquid at the start of the culture, the stirring is performed by alternately switching between the first stirring control and the second stirring control different from the first stirring control. A first process for controlling the unit is executed.

By repeating both the state in which the cells are easily brought into contact with each other to facilitate formation of the cell aggregates and the state in which the formed cell aggregates are stabilized, the cell aggregates are accurately formed in the culture unit 10. can grow.

<<27th Aspect of Culture System 1>>
A twenty-seventh aspect of the culture system 1 is according to the twenty-sixth aspect,
The control unit 50 is
After the first process, a second process is executed in which the stirring unit is operated by the first stirring control and the amount of liquid in the culture unit 10 is adjusted stepwise by the adjusting unit 40. .

The cell aggregates can be gradually grown according to the size of the cell aggregates so that they grow close to a size that does not lead out from the culture unit 10 .

<<28th Aspect of Culture System 1>>
A twenty-eighth aspect of the culture system 1 according to the twenty-seventh aspect,
The control unit 50 controls the adjustment unit 40 to
After the second process, when the liquid surface of the culture section 10 is higher than the outlet 12, the third process of exchanging the liquid via the path section 20 is executed.

The cell aggregates can be grown to a size that is not drawn out from the culture unit 10, and by circulating the liquid, the cell aggregates can finally grow to a desired size.

<<Light shielding part SP>>
As shown in FIG. 1, the constant temperature bath 80, the path portion 20, and the adjustment portion 40 are shielded from light by a light shielding member (light shielding portion SP). By shielding the constant temperature bath 80, the path part 20, and the adjustment part 40, light deterioration and decomposition of additives and the like are prevented, thereby prolonging the life of the liquid (for example, the culture medium) and improving the accuracy of the monitoring result by the monitoring part 30. For example, it is possible to improve the accuracy of measurement of medium components, imaging, and the like.

<<Cooling part CP>>
As shown in FIG. 1, the component application unit 42 of the adjustment unit 40 has a liquid storage unit 42a that stores liquid related to component application, and the component removal unit 44 has a liquid that stores liquid related to component removal. It has a reservoir 44a. The liquid storage portion 42a of the component applying portion 42 and the liquid storage portion 44a of the component removing portion 44 are cooled by a cooling member (cooling portion CP). By cooling the liquid reservoirs 42a and 44a, it is possible to prevent deterioration and decomposition of additives and the like.

<<<<first embodiment to third embodiment>>>>
The culture systems according to the first to third embodiments will be described below. The following is only an example, and the first to third embodiments and modifications given as examples in this specification are limited when applied to a specific one. Any combination may be used. For example, variations on one embodiment are also variations on other embodiments. Also, even if one modification and another modification are described independently, it should be understood that the combination of one modification and another modification is also described.

<<<<Details of the first embodiment>>>>
When culturing cell aggregates using a culture system in which the medium is fluidized by a liquid feed pump or the like, when the cell aggregates pass through the separation filter as the medium flows, there is a possibility that the cell aggregates will separate. . Therefore, unless the cell aggregates grow to a certain size (larger than the pore size of the cell separation filter), it may be difficult to apply this culture system. For this reason, a separate pre-incubation of cell aggregates could be required.

It is also known that the proliferation rate (aggregate growth rate) differs depending on the cell type and lot. Therefore, it is necessary to monitor the culture environment and control the culture conditions during the culture process. However, conventional culture systems only control the flow rate in the culture tank to be constant. Therefore, when the cell types and lots are different, it may take time to optimize the culture conditions (circulation flow rate, etc.) in the conventional culture system.

Below, 1st Embodiment is described based on drawing. FIG. 2 is a configuration diagram showing a schematic configuration of the culture system 1-1 according to the first embodiment.

The culture system 1-1 mainly includes
a culture device 100-1;
a route structure 200-1;
a monitoring device 300-1;
adjusting device 400-1;
a control device 500-1;
a stirring device 600-1;
Prepare.

<<Incubation device 100-1>>
The culture device 100-1 has a culture container 110-1. A culture medium and cells are accommodated in the culture vessel 110-1. Cells are cultured in culture container 110-1. Cells are cultured in the culture container 110-1, and cell aggregates are grown by contact between the cells. In the culture apparatus 100-1, cell aggregates are grown while controlling the size of the cell aggregates.

<<Path structure 200-1>>
Pathway structure 200-1 is interposed between incubation device 100-1 and adjustment device 400-1. The culture vessel 110-1 has an outlet port 112-1 and an inlet port 114-1. Outlet 112-1 and inlet 114-1 are connected to pathway structure 200-1. Path structure 200-1 communicates with outlet 112-1 and inlet 114-1.

The culture medium contained in culture container 110-1 is led out from outlet 112-1 and supplied to adjustment device 400-1 via pathway structure 200-1. The culture medium of adjusting device 400-1 is introduced into culture container 110-1 from inlet 114-1 through pathway structure 200-1. Pathway structure 200-1 allows media to flow between culture device 100-1 and conditioning device 400-1.

<<monitoring device 300-1>>
Monitoring device 300-1 monitors the state of cells and medium in culture device 100-1. For example, in the culture system 1-1 according to the first embodiment, the monitoring device 300-1 consists of a component monitoring device 310-1. The component monitor 310-1 detects pH, dissolved oxygen, glucose, lactic acid, temperature, and aggregate size. The component etc. monitoring device 310-1 outputs information (information on components etc.) indicating the detected pH, dissolved oxygen, glucose, lactic acid, temperature and aggregate size. The information on the components output from the component monitoring device 310-1 is supplied to the control device 500-1.

<<adjusting device 400-1>>
The adjustment device 400-1 controls the gas exchange module 416-1 and the dialysis module 412-1 according to instruction information (command, instruction amount, etc.) issued from the control device 500-1. The medium supplied from the culture container 110-1 to the adjustment device 400-1 is adjusted by the gas exchange module 416-1 and the dialysis module 412-1. The conditioned medium is returned to culture vessel 110-1.

Conditioning device 400-1 conditions the culture medium by a substance exchange technique. For example, the conditioner 400-1 conditions the medium by enriching with oxygen, continuously correcting the composition of nutrients and metabolites, and recycling growth factors remaining in the medium. . Remaining growth factors include both those added to the new medium and those produced by the cells.

<<control device 500-1>>
Control device 500-1 receives information about components output from component monitoring device 310-1 of monitoring device 300-1. Control device 500-1 generates and outputs instruction information according to the information on the component. The instruction information is information for changing operating conditions or adding pH adjusters, growth factors, etc., according to the composition of the medium.

<<stirring device 600-1>>
Agitator 600-1 agitates the medium contained in culture container 110-1 of culture device 100-1. Agitation of the medium facilitates contact between the cells and allows cell clumps to grow. As described above, the predetermined stirring conditions differ depending on the stage of culture. Predetermined stirring conditions increase the possibility of contact between cells, disperse the formed cell aggregates so as not to adhere (enlarge), and reduce the shear stress applied to the formed cell aggregates. This is a condition to prevent it from becoming large. By setting the predetermined stirring conditions in this manner, it is possible to facilitate the formation of cell aggregates by increasing the possibility that cells will come into contact with each other. By appropriately dispersing the formed cell aggregates, it is possible to prevent the cell aggregates from adhering to each other (enlarging). By preventing the shear stress applied to the cell aggregates from increasing, it is possible to prevent the formed cell aggregates from being broken.

<<<<Details of the second embodiment>>>>
Below, 2nd Embodiment is described based on drawing.

FIG. 3 is a block diagram showing details of the culture system 1-2 according to the second embodiment. FIG. 4 is a schematic diagram showing the positional relationship between the inlet 227-2 and the outlet 231-2 in the culture container 110-2. The dashed lines with arrows shown in FIG. 3 indicate the input and output of control-related signals. Furthermore, the two regions enclosed by the dashed lines in FIG. 3 are the light shielding portion SP indicating the components to be shielded from light and the cooling portion CP indicating the cooled components.

<<<Configuration of Culture System 1-2>>>
The culture system 1-2 is mainly
a culture device 100-2;
a route structure 200-2;
a monitoring device 300-2;
adjusting device 400-2;
a control device 500-2;
a stirring device 600-2;
have

<<Path structure 200-2>>
The route structure 200-2 is
a supply system 220-2;
a ring feed system 230-2;
have

<Supply system 220-2>
The supply system 220-2 is
a supply pipe 222-2;
a supply pipe 224-2;
a supply pipe 226-2;
have The culture medium is introduced into the culture device 100-2 through the supply system 220-2.

<Circular transport system 230-2>
The ring feed system 230-2 is
a ring feed pipe 232-2;
a ring feed pipe 234-2;
a ring feed pipe 236-2;
a ring feed pipe 238-2;
have The culture medium contained in culture device 100-2 is led out to circulation system 230-2. The medium drawn out to the circulation system 230-2 is returned (circulated) to the supply system 220-2.

<Circulatory system 240-2>
A circulation system 240-2 is composed of the supply system 220-2 and the circulation system 230-2.

<<New medium and circulation medium>>
Media include fresh media or perfusion media.

<New medium>
A new medium is a new medium stored in a medium tank 452-2, which will be described later. New medium is supplied from the medium tank 452-2 to the culture apparatus 100-2.

<Circulation medium>
The circulation medium is a medium that has already been stored in the culture apparatus 100-2 and used for cell culture. The circulation medium is drawn out from the medium tank 452-2 to the circulation system 230-2 and then sent to the supply system 220-2. The circulating medium is returned (circulated) to the medium tank 452-2 or discarded in a waste liquid tank 260-2, which will be described later.

<<Incubation device 100-2>>
The culture device 100-2 has a culture container 110-2. The culture container 110-2 is a container for containing a cell suspension. Culture vessel 110-2 functions as a bioreactor for culturing cells. Cells divide and multiply in the culture vessel 110-2. In the culture vessel 110-2, cell aggregates grow due to contact between cells.

<Supply Pipe 226-2 and Circular Feed Pipe 232-2>
As shown in FIG. 4, the culture container 110-2 is provided with a supply pipe 226-2 and a circulation pipe 232-2.

<Inlet 227-2>
The supply tube 226-2 has an inlet 227-2. The introduction port 227-2 opens toward the culture vessel 110-2. The medium supplied to culture container 110-2 flows through supply pipe 226-2. Both the fresh medium and the recycled medium flow through the supply tube 226-2. The medium flowing through the supply pipe 226-2 is introduced into the culture container 110-2 through the introduction port 227-2. The introduced culture medium is stored in culture vessel 110-2.

<Outlet 231-2>
The loop pipe 232-2 has an outlet port 231-2. The outlet 231-2 opens toward the culture container 110-2. The culture medium stored in culture container 110-2 is discharged to circulation tube 232-2 through outlet 231-2. The culture medium discharged from the culture container 110-2 flows through the circulation tube 232-2.

As will be described later, when the liquid level of the cell suspension is controlled to be lower than the outlet port 231-2, the circulation tube 232-2 contains the medium (circulation medium) and the cells. not. On the other hand, when the liquid level of the cell suspension is set higher than the outlet port 231-2, the circulation pump 210-2 is operated to such an extent that the cell aggregates are not led out to the circulation tube 232-2. By controlling in this way, it is possible to make it difficult for cells to be led out to the circulation tube 232-2. In addition, when there are cells near the outlet 231-2 of the circulation tube 232-2, there is a possibility that the cells are led out from the outlet 231-2. For this reason, a cell-medium separation filter 120-2, which will be described later, is provided to prevent the cells from flowing out to the circulation tube 234-2 and beyond even if the cells are drawn out to the circulation tube 232-2. there is The medium drawn out to the circulation tube 232-2 is circulated or discarded.

<Positions of Inlet 227-2 and Outlet 231-2>
As shown in FIG. 4, outlet port 231-2 is positioned lower than inlet port 227-2.

<Liquid level of cell suspension>

When the liquid level of the cell suspension is higher than the outlet 231-2, the medium can be drawn out from the outlet 231-2 by driving the circulation pump 210-2, which will be described later. During the medium exchange circulation culture process described later, the medium can be circulated by setting the liquid surface of the cell suspension higher than the outlet 231-2.

On the other hand, when the liquid level of the cell suspension is lower than the outlet 231-2, the culture medium cannot be discharged from the outlet 231-2. In the intermittent stirring culture process and medium additional culture process, which will be described later, the liquid surface of the cell suspension is made lower than the outlet 231-2 so that the medium and cells are not discharged from the outlet 231-2.

In this manner, the discharge of the culture medium from the culture container 110-2 can be controlled by driving the circulation pump 210-2 and the height of the liquid surface of the cell suspension.

The inlet 227-2 is positioned at the top of the culture container 110-2. Even when the liquid level of the cell suspension reaches its highest level, the inlet 227-2 does not come into contact with the cell suspension. Thereby, the introduction port 227-2 can be kept clean.

<<stirring device 600-2>>
<Configuration of stirring device 600-2>
Stirrer 600-2 stirs the medium stored in culture container 110-2. The stirring device 600-2 has a magnetic stirrer 610-2. Magnetic stirrer 610-2 has stirrer 612-2 and drive motor 614-2. The stirrer 612-2 is rotated by the rotational motion of the driving motor 614-2.

<Stirring by stirring device 600-2>
The medium is agitated by the rotation of the agitator 612-2. Agitation of the medium displaces cells and cell aggregates in the cell suspension. Displacement of the cells makes it easier for the cells to contact each other, and the contact between the cells promotes the formation of cell aggregates. By displacing the cell aggregates, it becomes in a state where it is easy to contact with the cells, and the cell aggregates become even larger due to the contact with the cells. The cells themselves also proliferate through cell division to form cell aggregates.

<Rotational Speed of Drive Motor 614-2>
The number of rotations of drive motor 614-2 is controlled by control device 500-2. By rotating the drive motor 614-2, the culture medium can be made to flow.

It is preferable that the minimum number of rotations of the drive motor 614-2 (corresponding to the minimum flow rate of the culture medium) is set so that the cells and cell aggregates do not come into contact with the wall surface of the culture vessel 110-2. The walls of the culture vessel 110-2 are all surfaces with which cells and cell aggregates may come into contact. For example, when the culture vessel 110-2 has a tubular or tubular shape, the wall surface is the inner surface of the bottom surface and side surfaces. On the other hand, the maximum rotation speed of the drive motor 614-2 (corresponding to the maximum flow velocity of the culture medium) causes the cells displaced in the culture container 110-2 to float, and the circulation pump 210-2 operates to cause the cells to flow from the outlet port 231-2. A degree that is not derived is preferable. As the cell aggregate becomes larger, it becomes heavier and sinks more easily, making it easier to come into contact with the bottom surface of the culture container 110-2. For this reason, control device 500-2 preferably performs control to increase the number of revolutions of drive motor 614-2 in accordance with the growth of cell aggregates (the size of cell aggregates, etc.).

<Rotation Direction of Drive Motor 614-2>
Drive motor 614-2 rotates in a fixed direction. For example, drive motor 614-2 rotates clockwise or counterclockwise in plan view. It should be noted that the drive motor 614-2 may be reversed as appropriate. By reversing the direction of rotation, the possibility of contact between cells and the possibility of contact between cells and cell aggregates can be increased.

<Modified Example of Stirrer 600-2>
In the above example, the stirring device 600-2 has the magnetic stirrer 610-2. The stirring device 600-2 is not limited to this, and may be a device that agitates the culture container 110-2 by inserting a shaft with an impeller attached therein and rotating or reciprocating it up and down (not shown). Further, the agitating device 600-2 may be a device using a rotating/shaking machine such as a roller bottle, a shaking flask, a culture bag, or the like (not shown). The stirrer 600-2 may be configured with a spinner flask (consisting of a culture vessel 110-2 and a stirrer (stirring blade)) or the like. The agitator 600-2 may be any device as long as it allows the medium to flow. The stirring device 600-2 may be any device as long as it can apply force to the cell suspension to flow the medium.

<<adjustment device 400-2>>
The adjustment device 400-2 supplies a new culture medium or a circulation feeding medium to the culture device 100-2. The adjustment device 400-2 has a circulation pump drive section 210A-2 and a supply pump drive section 410A-2.

<Circulation pump driving unit 210A-2>
The circulation pump drive section 210A-2 has a circulation pump 210-2 and circulation pipes 232-2 to 238-2 (circulation system 230-2).

<Circulation pump 210-2>
Circulation pump 210-2 draws out the culture medium stored in culture device 100-2 from outlet 231-2 to circulation pipe 232-2. The circulation medium discharged to the circulation pipe 232-2 is led to the oxygen supply module 420-2 via the circulation pipes 234-2 to 238-2 by the circulation pump 210-2. After passing through the oxygen supply module 420-2, the circulating medium is directed to the supply pump driver 410A-2. By operating the circulation pump 210-2, the outlet 231-2→circulation pipe 232-2→circulation pipe 234-2→circulation pipe 236-2→circulation pump 210-2→circulation pipe 238-2 →Oxygen supply module 420-2→... and so on to lead the circulation medium.

Circulation pump 210-2 is operated to such an extent that cell aggregates retained in culture apparatus 100-2 are not led out to circulation pipe 232-2. For example, by appropriately lowering the rotation speed of the circulation pump 210-2, the flow velocity of the circulation medium flowing through the circulation pipes 232-2 to 238-2 is reduced. By reducing the flow velocity in the circulation pipes 232-2 to 238-2, the gravitational sedimentation velocity of the cell aggregates is exceeded, and the cell aggregates stored in the culture apparatus 100-2 are removed through the circulation pipe 232-2. 2 can be avoided.

<Cell-medium separation filter 120-2>
Circulation pump driver 210A-2 has cell-medium separation filter 120-2. The cell-medium separation filter 120-2 is provided between the circulation tube 232-2 and the circulation tube 234-2. As described above, the circulation pump 210-2 is operated to such an extent that cell aggregates are not led out to the circulation tube 232-2. However, there is a possibility that cells that do not form cell aggregates may float and be introduced to the circulation tube 232-2. Therefore, by providing the cell-medium separation filter 120-2, it is possible to prevent cells from flowing out beyond the circulation tube 234-2.

<Sampling port 130-2>
The circulation pump driver 210A-2 has a sampling port 130-2. Sampling port 130-2 samples the flowing perfusion medium. The sampled medium can be analyzed by various analyzers and the like to obtain the state of the medium.

<Supply Pump Drive Unit 410A-2>
The supply pump drive unit 410A-2 includes an oxygen supply module 420-2, a pH adjuster supply unit 430-2, a glucose concentrate supply unit 440-2, a culture medium supply unit 450-2, a circulation heater 460-2, and a supply pipe 222. -2 to supply pipe 226-2 (supply system 220-2).

<Oxygen supply module 420-2>
Oxygenation module 420-2 adds oxygen to the circulating perfusion medium. Oxygen supply module 420-2 is connected to oxygen cylinder 424-2 via a pressure regulator (not shown) and valve 422-2. Valve 422-2 opens and closes according to a control signal from control device 500-2. When valve 422-2 is open, oxygen is supplied to the circulation medium from oxygen cylinder 424-2 via oxygen supply module 420-2. When valve 422-2 is closed, oxygen to the perfusion medium is shut off.

<pH adjuster supply unit 430-2>
The pH adjuster supply unit 430-2 has a pH adjuster tank 432-2 and a supply pump 434-2. A pH adjuster is stored in the pH adjuster tank 432-2. Supply pump 434-2 operates according to a control signal from controller 500-2. When the supply pump 434-2 operates, the pH adjuster stored in the pH adjuster tank 432-2 is drawn out to the supply pipe 222-2. The extracted pH adjuster is added to the circulation medium flowing through the supply pipe 222-2.

<Glucose concentrate supply unit 440-2>
Glucose concentrate supply 440-2 includes glucose concentrate tank 442-2 and supply pump 444-2. Concentrated glucose is stored in the concentrated glucose tank 442-2. Supply pump 444-2 operates according to a control signal from control device 500-2. When the supply pump 444-2 operates, the concentrated glucose liquid stored in the concentrated glucose tank 442-2 is discharged to the supply pipe 222-2. The withdrawn glucose concentrate is added to the permeate medium flowing through feed tube 222-2.

<Medium supply unit 450-2>
The medium supply section 450-2 has a medium tank 452-2, a supply pump 454-2 and a medium heater 456-2. A new culture medium is stored in the culture medium tank 452-2. Supply pump 454-2 operates according to a control signal from control device 500-2. When the supply pump 454-2 operates, the new medium stored in the medium tank 452-2 is discharged to the supply pipe 222-2 through the medium heater 456-2.

Medium heater 456-2 heats the new medium to a desired temperature. The new culture medium is also heated by a circulation heater 460-2, which will be described later. Medium tank 452-2 stores new medium at a low temperature. Therefore, the circulation heater 460-2 alone is likely to provide insufficient heating to supply the culture container 110-2. The medium heater 456-2 preliminarily heats the new medium to a certain temperature. The warmed fresh medium is added to the permeate medium flowing through supply tube 222-2.

<Circulation heater 460-2>
The circulating heater 460-2 contains a circulating medium, a new medium, a pH adjuster, and a glucose concentrate (hereinafter, for convenience, the circulating medium and the new medium are simply referred to as medium without distinguishing between them. In addition, the pH adjuster , including the glucose concentrate, simply referred to as medium). Circulation heater 460-2 heats the passing medium to a temperature suitable for supply to culture vessel 110-2. Specifically, circulation heater 460-2 heats the passing culture medium to a temperature suitable for culturing cells in culture container 110-2.

Circulation heater 460-2 operates according to a control signal from control device 500-2. Circulation heater 460-2 heats the passing culture medium according to a control signal.

<<Three-way valve 250-2 and waste liquid tank 260-2>>
A three-way valve 250-2 controls the flow of medium through circulation heater 460-2. The three-way valve 250-2 can be switched to either a medium supply state or a medium waste state.

<Medium supply state>
The medium supply state is a state in which the medium is supplied to the culture container 110-2. The culture medium supply state is a state in which the supply pipe 224-2 and the supply pipe 226-2 are in communication. When the three-way valve 250-2 is in the medium supply state, the medium is supplied to the culture container 110-2 through the supply pipes 224-2 and 226-2.

<Medium disposal state>
The medium discard state is a state in which the medium is discharged to the waste liquid tank 260-2. The medium discarding state is a state in which the supply pipe 224-2 and the discarding pipe 262-2 are in communication. When the three-way valve 250-2 is placed in the medium discard state, the medium is discarded to the waste liquid tank 260-2 through the supply pipe 224-2 and the discard pipe 262-2. The culture medium to be discarded is led to the waste liquid tank 260-2.

Three-way valve 250-2 operates according to a control signal from control device 500-2. The three-way valve 250-2 is in the medium supply state or the medium discard state according to the control signal.

<<Light shielding part SP>>
As shown in FIG. 3, the culture vessel 110-2, the ring-feeding tube 232-2, the ring-feeding tube 234-2, the ring-feeding tube 236-2, the ring-feeding tube 238-2, and the cell-medium separation Filter 120-2, sampling port 130-2, oxygen supply module 420-2, supply pipe 222-2, supply pipe 224-2, supply pipe 226-2, pH adjuster supply part 430-2 , the glucose concentrate supply unit 440-2, and the culture medium supply unit 450-2 are shielded from light by a light shielding member (light shielding portion SP). By blocking light, it is possible to prevent photodegradation and decomposition of additives and the like, and to improve the accuracy of monitoring results by the monitoring device 300-2, for example, the accuracy of measurement of medium components and imaging.

<<Cooling part CP>>
The pH adjuster tank 432-2, glucose concentrate tank 442-2, and culture medium tank 452-2 are cooled by a low-temperature constant temperature bath (cooling portion CP). By cooling the pH adjuster supply unit 430-2, the glucose concentrate supply unit 440-2, and the culture medium supply unit 450-2, it is possible to prevent the above-described deterioration and decomposition of the additives.

<<monitoring device 300-2>>
The monitoring device 300-2 has detection devices such as various sensors. A detection signal emitted from the detection device is transmitted to the control device 500-2.

FIG. 5 is a block diagram showing various sensors included in monitoring device 300-2. As shown in FIG. 5, the monitoring device 300-2
a temperature sensor 312-2;
a dissolved oxygen sensor 314-2;
a pH sensor 316-2;
a liquid level sensor 318-2;
have

<Temperature sensor 312-2>
Temperature sensor 312-2 detects the temperature of the culture medium stored in culture vessel 110-2. Temperature sensor 312-2 outputs a detection signal indicating the detected temperature.

<Dissolved oxygen sensor 314-2>
Dissolved oxygen sensor 314-2 detects the amount of dissolved oxygen in the medium stored in culture vessel 110-2. The dissolved oxygen sensor 314-2 outputs a detection signal indicating the detected amount of dissolved oxygen.

<pH sensor 316-2>
pH sensor 316-2 detects the pH value of the medium stored in culture container 110-2. The pH sensor 316-2 outputs a detection signal indicating the detected pH value.

<Liquid level sensor 318-2>
A liquid level sensor 318-2 detects the liquid level of the cell suspension stored in the culture vessel 110-2. The liquid level sensor 318-2 outputs a detection signal indicating the presence or absence of the liquid level (whether the liquid level is positioned).

For example, a plurality of liquid level sensors are provided as liquid level sensors 318-2 at different liquid level positions of culture container 110-2 (not shown). Of the plurality of liquid level sensors, only the liquid level sensor at which the liquid level is located outputs a signal indicating the existence of the liquid level. Among the plurality of liquid level sensors, the liquid level sensor at which the liquid level is not located outputs a signal indicating that the liquid level does not exist. By doing so, the position of the liquid surface of the cell suspension in the culture container 110-2 can be obtained.

<Camera 320-2>
Monitoring device 300-2 may have camera 320-2. Camera 320-2 images cells and cell aggregates cultured in culture container 110-2. Camera 320-2 outputs a detection signal indicating the captured image. An image to be captured may be a still image or a moving image. Any image can be used as long as the state (size, etc.) of cells or cell aggregates can be acquired.

<<control device 500-2>>
The control device 500-2 executes various arithmetic processing, data processing, and judgment processing based on various detection signals emitted from the monitoring device 300-2, and controls pumps and the like.

The control device 500-2 mainly includes a processor (CPU (central processing unit), etc.), ROM (read only memory), RAM (random access memory), I/F (interface device), auxiliary storage device (HDD (hard disk drive), SSD (solid state drive), etc.), and input operation devices (keyboard, mouse, touch panel, etc.). For example, it can be a personal computer, a tablet computer, a portable terminal device, or a similar device.

The control device 500-2, via an I/F (interface device),
a stirring device 600-2;
valve 422-2;
a three-way valve 250-2;
a circulation pump 210-2;
a feed pump 434-2;
a supply pump 444-2;
a supply pump 454-2;
a medium heater 456-2;
a circulation heater 460-2;
a control signal to each of the

<Control of magnetic stirrer 610-2>
Control device 500-2 transmits a control signal indicating the number of rotations of drive motor 614-2 to stirring device 600-2.

The number of revolutions is such that the cells in the culture vessel 110-2 are easily brought into contact with each other, the cells are not in contact with the walls, and the cells are not lifted up to the outlet 231-2. The walls of the culture vessel 110-2 are all surfaces with which cells and cell aggregates may come into contact. For example, when the culture container 110-2 has a tubular shape, the wall surface is the inner surface of the bottom surface and side surfaces. This number of revolutions is determined by a preliminary experiment or the like, and is stored in advance in an auxiliary storage device or the like.

In addition, as described above, as the cell aggregates grow, they become heavier and more likely to sink, making it easier for them to come into contact with the bottom surface of the culture vessel 110-2. This number of revolutions is also determined by a preliminary experiment or the like, and is stored in advance in an auxiliary storage device or the like in association with the elapsed time from the start of culture. The control device 500-2 reads out the number of revolutions corresponding to the elapsed time from the start of culture from an auxiliary storage device or the like, and transmits it to the magnetic stirrer 610-2.

<Control of valve 422-2>
Controller 500-2 sends a control signal to valve 422-2 indicating whether valve 422-2 is open or closed. When control device 500-2 sends a control signal indicating an open state to valve 422-2, valve 422-2 is opened. When the valve 422-2 is opened, the oxygen cylinder 424-2 and the oxygen supply module 420-2 are communicated. Oxygen is supplied to the perfusion medium via oxygen supply module 420-2.

When control device 500-2 sends a control signal indicating a closed state to valve 422-2, valve 422-2 is closed. When the valve 422-2 is closed, the communication between the oxygen cylinder 424-2 and the oxygen supply module 420-2 is interrupted, and the supply of oxygen to the circulation medium is stopped.

Control device 500-2 acquires the amount of dissolved oxygen in the culture medium of culture vessel 110-2 from the detection signal output from dissolved oxygen sensor 314-2. Control device 500-2 controls valve 422-2 to achieve a predetermined target dissolved oxygen concentration. For example, by PID control (Proportional-Integral-Differential control), the valve 422-2 is controlled so as to achieve the target dissolved oxygen concentration based on the acquired amount of dissolved oxygen. The supply of oxygen is executed in the culture medium exchange circulation culture process described later.

<Control of three-way valve 250-2>
The control device 500-2 sends a control signal to the three-way valve 250-2 to indicate the medium supply state or the medium discard state. When the control device 500-2 sends a control signal indicating the culture medium supply state to the three-way valve 250-2, the supply pipe 224-2 and the supply pipe 226-2 are communicated. The medium is supplied to the culture container 110-2 through the supply pipes 224-2 and 226-2 by communication between the supply pipes 224-2 and 226-2.

When the control device 500-2 sends a control signal indicating the culture medium discarding state to the three-way valve 250-2, the supply pipe 224-2 and the discard pipe 262-2 are communicated with each other. The communication between the supply pipe 224-2 and the waste pipe 262-2 causes the culture medium to be discharged to the waste liquid tank 260-2 via the supply pipe 224-2 and the waste pipe 262-2.

<Control of circulation pump 210-2>
Controller 500-2 sends a control signal to circulating pump 210-2 to indicate whether to operate or stop. When control device 500-2 sends a control signal indicating operation to circulation pump 210-2, circulation pump 210-2 operates. This allows the medium to circulate. When control device 500-2 transmits a control signal indicating stop to circulation pump 210-2, circulation pump 210-2 stops. Thereby, circulation of the medium can be stopped.

Control device 500-2 can also include information indicating the number of rotations of circulation pump 210-2 in a control signal and send it to circulation pump 210-2. Circulation pump 210-2 operates at the rotational speed indicated by the control signal. By changing the number of revolutions of the circulation pump 210-2, the flow rate (flow rate) of the culture medium per unit time can be adjusted. The number of revolutions of circulation pump 210-2 is determined by a preliminary experiment or the like, and is stored in advance in an auxiliary storage device or the like in association with the flow rate per unit time.

When the control device 500-2 sends a control signal indicating the medium supply state to the three-way valve 250-2 and sends a control signal indicating operation to the circulation pump 210-2, the three-way valve 250-2 enters the medium supply state, Circulation pump 210-2 operates. By controlling in this way, culture vessel 110-2→outlet 231-2→circulating tube 232-2→circulating tube 234-2→circulating tube 236-2→circulating pump 210-2→circulating tube 238-2→oxygen supply module 420-2→supply pipe 222-2→circulation heater 460-2→supply pipe 224-2→supply pipe 226-2→introduction port 227-2→culture vessel 110-2 , the medium can be circulated.

When the control device 500-2 sends a control signal indicating the medium discard state to the three-way valve 250-2 and sends a control signal indicating operation to the circulation pump 210-2, the three-way valve 250-2 enters the medium discard state, Circulation pump 210-2 operates. By controlling in this way, culture vessel 110-2→outlet 231-2→circulating tube 232-2→circulating tube 234-2→circulating tube 236-2→circulating pump 210-2→circulating tube 238-2→oxygen supply module 420-2→supply pipe 222-2→circulation heater 460-2→supply pipe 224-2→discard pipe 262-2→waste liquid tank 260-2 to dispose of the culture medium. can be done.

<Control of Supply Pump 434-2>
Controller 500-2 sends a control signal to feed pump 434-2 indicating to activate or deactivate. Feed pump 434-2 is activated when controller 500-2 sends a control signal indicating activation to feed pump 434-2. By operating the supply pump 434-2, the pH adjuster stored in the pH adjuster tank 432-2 is led out to the supply pipe 222-2.

When controller 500-2 sends a control signal to stop feed pump 434-2, feed pump 434-2 stops. Stopping the supply pump 434-2 stops the delivery of the pH adjuster to the supply pipe 222-2.

The control device 500-2 can also include information indicating the number of rotations of the supply pump 434-2 in a control signal and transmit the control signal to the supply pump 434-2. The supply pump 434-2 operates at the speed indicated by the control signal. By changing the rotation speed of the supply pump 434-2, the flow rate (flow velocity) of the pH adjuster per unit time can be adjusted. The rotation speed of the supply pump 434-2 is determined by a preliminary experiment or the like, and is stored in advance in an auxiliary storage device or the like in association with the flow rate per unit time.

<Control of supply pump 444-2>
Controller 500-2 sends a control signal to feed pump 444-2 to activate or deactivate. Feed pump 444-2 is activated when controller 500-2 sends a control signal indicating activation to feed pump 444-2. By operating the supply pump 444-2, the concentrated glucose liquid stored in the concentrated glucose tank 442-2 is led out to the supply pipe 222-2.

When controller 500-2 sends a stop control signal to feed pump 444-2, feed pump 444-2 stops. Stopping the supply pump 444-2 stops the delivery of the concentrated glucose solution to the supply pipe 222-2.

The control device 500-2 can also include information indicating the rotation speed of the supply pump 444-2 in a control signal and transmit the control signal to the supply pump 444-2. The supply pump 444-2 operates at the speed indicated by the control signal. By changing the rotation speed of the supply pump 444-2, the flow rate (flow rate) of the concentrated glucose solution per unit time can be adjusted. The rotation speed of the supply pump 444-2 is determined by a preliminary experiment or the like, and is stored in advance in an auxiliary storage device or the like in association with the flow rate per unit time.

<Control of Supply Pump 454-2>
Controller 500-2 sends a control signal to feed pump 454-2 indicating to activate or deactivate. Feed pump 454-2 is activated when controller 500-2 sends a control signal indicating activation to feed pump 454-2. By operating the supply pump 454-2, the new medium stored in the medium tank 452-2 is drawn out to the supply pipe 222-2.

When controller 500-2 sends a stop control signal to feed pump 454-2, feed pump 454-2 stops. Stopping the supply pump 454-2 stops the delivery of the new culture medium to the supply pipe 222-2.

The control device 500-2 can also include information indicating the rotation speed of the supply pump 454-2 in a control signal and transmit the control signal to the supply pump 454-2. The supply pump 454-2 operates at the speed indicated by the control signal. By changing the number of revolutions of the supply pump 454-2, the flow rate (flow rate) of the new culture medium per unit time can be adjusted. The rotation speed of the supply pump 454-2 is determined by a preliminary experiment or the like, and is stored in advance in an auxiliary storage device or the like in association with the flow rate per unit time.

<Control of medium heater 456-2>
Controller 500-2 sends a control signal to medium heater 456-2 indicating to turn it on or off. The medium heater 456-2 is activated when the control unit sends a control signal indicating activation to the medium heater 456-2. By operating the medium heater 456-2, the new medium stored in the medium tank 452-2 is heated by the medium heater 456-2 and discharged to the supply pipe 222-2.

When controller 500-2 sends a control signal to stop medium heater 456-2, medium heater 456-2 stops.

The controller 500-2 can also include information indicating the current value of the culture medium heater 456-2 in a control signal and send it to the culture medium heater 456-2. Medium heater 456-2 operates at the current value indicated by the control signal. By changing the current value of the medium heater 456-2, the temperature for heating the new medium can be adjusted. The current value of the culture medium heater 456-2 is determined by a preliminary experiment or the like, is associated with the temperature, and is stored in advance in an auxiliary storage device or the like.

<Control of circulation heater 460-2>
Controller 500-2 sends a control signal to circulating heater 460-2 to activate or deactivate. Circulation heater 460-2 is activated when the controller sends a control signal indicating activation to circulation heater 460-2. By operating circulation heater 460-2, the medium passing through circulation heater 460-2 is heated by circulation heater 460-2.

When controller 500-2 sends a control signal to stop circulation heater 460-2, circulation heater 460-2 stops.

Control device 500-2 can include information indicating the current value of circulation heater 460-2 in a control signal and transmit the control signal to circulation heater 460-2. Circulation heater 460-2 operates at the current value indicated by the control signal. By changing the current value of circulation heater 460-2, the temperature of the culture medium passing through circulation heater 460-2 can be adjusted. The current value of circulating heater 460-2 is determined by a preliminary experiment or the like, is associated with the temperature, and is stored in advance in an auxiliary storage device or the like.

<<<processing of culture system 1-2>>>
FIG. 6 is a time chart showing an outline of processing of the culture system 1-2. FIG. 7 is a schematic diagram showing the state of cell aggregates grown by the treatment of the culture system 1-2.

The treatment of the culture system 1-2 is
It has a seeding process, an intermittent agitation culture process, a medium additional culture process, and a medium exchange circulation culture process.

<< Seeding process >>
The seeding process is a process of preparing a cell suspension in the culture container 110-2. The seeding process can produce a cell suspension in which the cells are dispersed in the medium. The sowing process may be performed by the control device 500-2 or manually by an operator. In order to facilitate contact between cells, the liquid level of the cell suspension in the culture vessel 110-2 should be prepared to be lower than the outlet port 231-2.

The intermittent stirring culture process, medium additional culture process, and medium exchange circulation culture process will be described along the time chart shown in FIG.

<<Intermittent stirring culture treatment>>
The intermittent agitation culture treatment is a cell aggregation treatment in the initial stage. Cell aggregates are produced by the intermittent agitation culture treatment. In the intermittent agitation culture process, as shown in FIG. 7(a), agitation and stop are performed at least once. In the intermittent agitation culture treatment, it is preferable to repeat agitation and stop a plurality of times. Aggregation is promoted by stirring the cell suspension so that the cells can easily contact each other. Stopping the agitation keeps the cells in contact and produces stable cell clumps.

In the example shown in FIG. 6, the intermittent agitation culturing processes are the process numbers IN1 to IN4, . . . In the example shown in FIG. 6, stirring and stopping are repeated multiple times. In the intermittent agitation culture process, the amount of medium (the amount of cell suspension) in the culture vessel 110-2 is constant.

<Control of supply pump 434-2 and supply pump 444-2, valve 422-2, medium heater 456-2 and circulation heater 460-2>
In the intermittent agitation culture process, the control device 500-2 transmits a control signal indicating stop to the supply pumps 434-2 and 444-2. Accordingly, in the intermittent agitation culture treatment, the pH adjuster and the glucose concentrate are not supplied to the medium.

Further, in the intermittent agitation culture process, control device 500-2 transmits a control signal indicating the closed state to valve 422-2. Thereby, oxygen is not supplied to the culture medium in the intermittent agitation culture treatment.

In the intermittent agitation culture process, control device 500-2 transmits a control signal indicating the culture medium supply state to three-way valve 250-2. As a result, the three-way valve 250-2 is in the medium supply state in the intermittent agitation culture process.

In the intermittent agitation culture process, control device 500-2 transmits a control signal indicating stop to culture medium heater 456-2 and circulation heater 460-2. As a result, in the intermittent agitation culture process, the medium heater 456-2 and the circulation heater 460-2 do not operate and are stopped.

<Stirring control (processing numbers IN1, IN3, . . . )>
Control device 500-2 reads the number of revolutions stored in an auxiliary storage device or the like, and transmits the number of revolutions to magnetic stirrer 610-2. Control device 500-2 operates drive motor 614-2 of magnetic stirrer 610-2 to rotate stirrer 612-2. As a result, the stirrer 612-2 rotates to start stirring the culture medium.

<Stop control (processing numbers IN2, IN4, . . . )>
Control device 500-2 transmits a stop control signal to magnetic stirrer 610-2 after the stirring time has elapsed since the start of stirring. As a result, the drive motor 614-2 stops and the stirrer 612-2 stops. The stationary state of the stirrer 612-2 causes the medium to gradually decelerate and stop.

<Repetition of stirring and stopping after the second time>
The second and subsequent agitation (process number IN3 in FIG. 6, etc.) is started after the agitation is stopped and the stop time has elapsed. Stirring is started by executing the aforementioned stirring control.

<Main features of intermittent stirring culture treatment>
In the intermittent stirring culture process, stirring and stopping are performed at least once. Stirring and stopping are preferably repeated multiple times. By repeating stirring and stopping, a stable cell aggregate can be gradually grown (see FIG. 7(a)).

<Maximum number of repetitions of stirring and stopping>
The maximum number of repetitions of stirring and stopping is the number of times until the cell aggregates reach the desired size and increase to the desired number by the intermittent stirring culture treatment. The maximum number of iterations is based on cell type and the like. The maximum number of iterations is determined by preliminary experiments or the like, and stored in advance in an auxiliary storage device or the like. Controller 500-2 repeats stirring and stopping until the maximum number of repetitions is reached.

<Stirring time and stop time>
The stirring time during which the drive motor 614-2 is rotated and the stop time during which the drive motor 614-2 is stopped are also based on the type of cells, the size of the target cell aggregates, and the like. The stirring time and stopping time are determined by a preliminary experiment or the like, and stored in advance in an auxiliary storage device or the like. The control device 500-2 reads out the stirring time and stop time, and determines whether or not the stirring time and stop time have been reached.

<Others>
When stirring and stopping are repeated, each stirring time may be the same time or may be different from each other. Similarly, when stirring and stopping are repeated, each of the stopping times may be the same time or different times.

Based on the image captured by the camera 320-2, the size and number of cell aggregates may be obtained to determine the stirring time, stop time, and whether or not to repeat. It is preferable to convert the captured image into an image from which the size and number of cell aggregates can be easily obtained by subjecting the captured image to various image processing.

Alternatively, the drive motor 614-2 may be rotated slowly without stopping completely to displace the culture medium at a slow flow rate. Abrupt changes in shear stress applied to cells and cell aggregates can be prevented.

The speed of drive motor 614-2 of magnetic stirrer 610-2 may be gradually changed when stirring is started or stopped. It is possible to gently change the shear stress applied to cells and cell aggregates.

The direction of rotation of drive motor 614-2 may be reversed during stirring. Also, the rotation direction of the drive motor 614-2 may be reversed each time the mixture is stirred. The possibility of contact between cells and the possibility of contact between cell aggregates and cells can be changed or increased.

<<Medium Additional Culture Processing and Medium Additional Preparation Processing>>
The medium supplementation culture treatment is a cell aggregation treatment in an intermediate stage. As shown in FIG. 7(b), the cell aggregates are grown by sequentially adding the medium by the medium addition culture treatment.

Sequential addition of medium causes the cells to divide to increase the number of cells and increase the size of the cell clumps. When cells not included in the cell aggregate divide, they make new contact with the cell aggregate and enlarge the cell aggregate. When a cell contained in a cell clump divides, it enlarges the contained cell clump.

At the start of the medium supplementation culture treatment, cell aggregates are still small. For this reason, if the medium is circulated, there is a possibility that it will enter the circulation pipe 232-2, etc., and the medium is not circulated in the medium additional culture process. By means of the medium additional culture treatment, the cell aggregates are grown and enlarged to such an extent that they do not enter the circulation tube 232-2.

In the example shown in FIG. 6, the medium additional culturing treatments are treatment numbers AD1 to AD2, . . . In addition, as shown in FIG. 6, a medium addition preparation process (process number PA1) is executed before the medium addition culture process. The medium addition preparation process is a medium priming process.

In addition, in the medium addition preparation process and the medium additional culture process, the pH adjuster, glucose concentrate, and oxygen are not supplied to the medium following the intermittent agitation culture process.

<Medium addition preparation processing (processing number PA1)>
Controller 500-2 sends control signals to medium heater 456-2 and circulation heater 460-2 to indicate operation. This activates medium heater 456-2 and circulation heater 460-2 prior to adding medium. When adding the medium, the medium can be warmed precisely.

Control device 500-2 reads the number of revolutions stored in an auxiliary storage device or the like, and transmits the number of revolutions to magnetic stirrer 610-2. Control device 500-2 operates drive motor 614-2 of magnetic stirrer 610-2 to rotate stirrer 612-2. As a result, the stirrer 612-2 rotates at a predetermined number of revolutions, and stirring is started again.

Control device 500-2 sends a control signal indicating the culture medium discarding state to three-way valve 250-2. As a result, the three-way valve 250-2 allows the supply pipe 224-2 and the waste pipe 262-2 to communicate with each other.

Controller 500-2 sends a control signal to feed pump 454-2 indicating activation. As a result, the new medium stored in the medium tank 452-2 is heated by the medium heater 456-2 and discharged to the supply pipe 222-2.

The new culture medium led out to the supply pipe 222-2 passes through the circulation heater 460-2, flows through the supply pipe 224-2, and reaches the three-way valve 250-2. The new culture medium that has reached the three-way valve 250-2 is guided toward the disposal pipe 262-2 and discarded in the waste liquid tank 260-2. As a result, the supply tube to which the circulation heater 460-2 is attached, the supply tube 224-2 and the three-way valve 250-2 can be washed with the new medium (medium priming).

Media priming is performed as follows. The new medium stored in the medium tank 452-2 is made to flow to the supply pipe 222-2 using the supply pump 454-2. The flowing culture medium passes through the medium heater 456-2 and the circulation heater 460-2, the three-way valve 250-2, the waste pipe 262-2, and reaches the waste liquid tank 260-2. Washing these tubes and the like by flowing media is referred to as media priming.

Controller 500-2 sends a control signal indicating a stop to supply pump 454-2 after a predetermined period of time has elapsed. As a result, the delivery of the new medium to the supply pipe 222-2 is stopped, and medium priming is completed. The predetermined time is based on the cell type and the number of rotations of the supply pump 454-2. The predetermined time is determined by a preliminary experiment or the like, and stored in advance in an auxiliary storage device or the like.

<Medium additional culture treatment>
After the medium addition preparation process (PA1), the medium addition culture process is performed. The medium additional culture treatments are indicated by treatment numbers AD1 to AD2, . . . shown in FIG.

<Medium addition treatment (treatment number AD1)>

Control device 500-2 sends a control signal indicating the medium supply state to three-way valve 250-2. As a result, the three-way valve 250-2 enters the culture medium supply state. Incidentally, as described above, the culture medium heater 456-2 and the circulation heater 460-2 are already in operation.

Controller 500-2 sends a control signal to feed pump 454-2 indicating activation. As a result, the new medium stored in the medium tank 452-2 is heated by the medium heater 456-2 and discharged to the supply pipe 222-2.

The new culture medium drawn out to the supply pipe 222-2 is heated by the circulation heater 460-2, flows through the supply pipe 224-2, and reaches the three-way valve 250-2. The new medium that has reached the three-way valve 250-2 is guided toward the supply pipe 226-2 and introduced into the culture vessel 110-2 through the introduction port 227-2. In this manner, new medium is added to culture vessel 110-2.

Controller 500-2 sends a control signal indicating a stop to supply pump 454-2 after a predetermined period of time has elapsed. This completes the first addition of the new medium to the culture vessel 110-2.

The predetermined time is the time corresponding to the amount of medium added. The predetermined time is based on the type of cell, the rotation speed of the supply pump 454-2, and the like. The predetermined time is determined by a preliminary experiment or the like, and stored in advance in an auxiliary storage device or the like.

Controller 500-2 also sends control signals to stop medium heater 456-2 and circulation heater 460-2. This stops the supply pump 454-2, medium heater 456-2 and circulation heater 460-2.

<Medium addition treatment (treatment number AD2)>
The medium addition process (process number AD2) is a process in which the medium is added again after a predetermined period of time after the medium has been added by the medium addition process (process number AD1) described above.

The control device 500-2 sends a control signal indicating operation to the medium heater 456-2 and the circulation heater 460-2 after a predetermined time has passed since the addition of the new medium to the culture container 110-2 is completed. do. This activates medium heater 456-2 and circulation heater 460-2 prior to the next addition of medium. When adding the medium, the medium can be warmed precisely.

The three-way valve 250-2 is already in the state of discarding the culture medium, and the supply pipe 224-2 and the discard pipe 262-2 are in communication.

Controller 500-2 sends a control signal to feed pump 454-2 indicating activation. As a result, the new medium stored in the medium tank 452-2 is heated by the medium heater 456-2 and discharged to the supply pipe 222-2.

The new medium drawn out to the supply pipe 222-2 is heated by the circulation heater 460-2, flows through the supply pipe 224-2, passes through the three-way valve 250-2, and enters the inlet 227- of the supply pipe 226-2. 2 into the culture container 110-2. In this way, new medium is added to the culture vessel 110-2 again.

Controller 500-2 sends a control signal indicating a stop to supply pump 454-2 after a predetermined period of time has elapsed. This completes the second addition of the new medium to the culture container 110-2.

The predetermined time is the time corresponding to the amount of medium added. The predetermined time is based on the type of cell, the rotation speed of the supply pump 454-2, and the like. The predetermined time is determined by a preliminary experiment or the like, and stored in advance in an auxiliary storage device or the like. The prescribed time may be the same as or different from the prescribed time for the first addition of the new culture medium.

<Medium addition treatment (treatment number AD2 or later)>
Addition of medium can be repeated multiple times in the same manner as in Treatment Nos. AD1 and AD2.

<Position of the liquid surface and completion of medium additional culture processing>
Each time a new medium is added to culture vessel 110-2, the liquid level of the cell suspension stored in culture vessel 110-2 gradually rises. When the liquid level of the cell suspension becomes higher than the outlet port 231-2 due to the addition of the medium, the medium addition culture process is terminated.

By making the liquid level of the cell suspension higher than the outlet port 231-2, the medium can be discharged from the outlet port 231-2 to the circulation tube 232-2.

<Characteristics of medium additional culture treatment>
The medium supplementation culture treatment causes the cells to grow and divide further by adding medium to increase the size of the cell clumps. In the medium addition culture treatment, the medium is added at least once. In the medium addition culture treatment, it is preferable to add the medium multiple times.

The number of times the medium is added and the amount of medium to be added are based on the type of cells, the size of the desired aggregates, and the like. These are also determined by preliminary experiments and the like, and are stored in advance in an auxiliary storage device or the like.

<Others>
The amount of medium to be added may be the same amount each time it is added, or it may be a different amount each time it is added.

Based on the image captured by camera 320-2, the size and number of cell aggregates may be obtained to determine the amount of medium to be added and the number of additions. It is preferable to convert the captured image into an image from which the size and number of cell aggregates can be easily obtained by subjecting the captured image to various image processing.

<<Medium replacement circulation culture process and medium circulation preparation process>>
The medium exchange circulation culture treatment is the final stage of cell agglutination treatment. Cell aggregates are grown (enlarged) to the desired final stage by medium exchange circulation culture treatment. Sequential exchange of the medium supplies fresh medium and causes the cells to divide further to increase the number of cells and increase the size of the cell clumps. Furthermore, by circulating the medium and adding a pH adjuster, etc., not only the medium but also the nutrients necessary for cell growth are supplied, the cells are further divided, the cells are increased, and the cell aggregates are formed. Enlarge.

At the final stage of the medium additional culture process, the cell aggregates have already grown to such an extent that they do not enter the circulation pipe 232-2. For this reason, in the medium exchange circulation culture process, nutrients that are insufficient when supplying the medium are supplemented with a pH adjuster, a concentrated glucose solution, and a dissolved oxygen amount by circulating the medium. Finally, the desired size of cell aggregates can be obtained.

In the example shown in FIG. 6, the medium exchange circulation culture treatments are treatment numbers EX1-1 to EX1-3, EX2-1 to EX2-3, EX3-1 to EX3-3, . In the medium exchange circulation culture process, medium discharge, supply, and circulation are repeated multiple times.

In addition, as shown in FIG. 6, the medium circulation preparation process (process numbers PE1 to PE3) is executed before the medium exchange circulation culture process. The medium circulation preparation process is a circulation priming process.

<Medium circulation preparation processing (processing numbers PE1 to PE3)>

As previously mentioned, medium heater 456-2 and circulation heater 460-2 are already operating. In addition, in the medium circulation preparation process, the pH adjuster, glucose concentrate, and oxygen are not supplied to the medium following the medium additional culture process.

<Circular Priming (Processing Number PE1)>
Control device 500-2 sends a control signal indicating the culture medium discarding state to three-way valve 250-2. As a result, the three-way valve 250-2 is placed in the culture medium discarding state.

Controller 500-2 sends a control signal indicating operation to circulation pump 210-2. This activates the circulation pump 210-2. By operating the circulation pump 210-2, the culture medium stored in the culture container 110-2 is discharged to the circulation pipe 232-2 through the outlet 231-2. The culture medium discharged to the circulation tube 232-2 is routed through the culture vessel 110-2→outlet 231-2→circulation tube 232-2→circulation tube 234-2→circulation tube 236-2→circulation pump 210- 2 → circulation pipe 238-2 → oxygen supply module 420-2 → supply pipe 222-2 → circulation heater 460-2 → supply pipe 224-2 → waste liquid tank 262-2 discarded.

Based on the detection signal output from the liquid level sensor 318-2, the control device 500-2 outputs a control signal indicating to stop the circulation pump when the liquid level of the cell suspension becomes lower than the outlet port 231-2. 210-2. This stops the circulation pump 210-2.

This ends the circular priming. By circulation priming, the circulation pipes 232-2 to 238-2, the circulation pump 210-2, the oxygen supply module 420-2, the supply pipes 222-2 to 224-2, the circulation heater 460-2, and the three-way valve 250-2 are turned on. , can be washed with the medium (circulating medium) contained in the culture container 110-2.

<Addition (processing number PE2)>
Control device 500-2 sends a control signal indicating the medium supply state to three-way valve 250-2. As a result, the three-way valve 250-2 enters the culture medium supply state.

Control device 500-2 sends a control signal indicating a stop to circulation heater 460-2. This causes circulation heater 460-2 to stop. Incidentally, the culture medium heater 456-2 is already in operation.

Controller 500-2 sends a control signal to feed pump 454-2 indicating activation. As a result, the new medium stored in the medium tank 452-2 is heated by the medium heater 456-2 and discharged to the supply pipe 222-2.

The new culture medium led out to the supply pipe 222-2 is heated by the circulation heater 460-2, flows through the supply pipe 224-2, and reaches the three-way valve 250-2. The new culture medium reaching the three-way valve 250-2 is guided toward the supply pipe 226-2 and introduced into the culture vessel 110-2 through the introduction port 227-2. In this manner, new medium is added to culture vessel 110-2.

Based on the detection signal output from the liquid level sensor 318-2, the control device 500-2 outputs a control signal indicating the stop of the supply pump when the liquid level of the cell suspension becomes higher than the outlet port 231-2. 454-2. This causes the supply pump 454-2 to stop.

Controller 500-2 sends a control signal to medium heater 456-2 indicating a stop. This stops the medium heater 456-2.

In this manner, new medium can be added to culture vessel 110-2.

<Circulation 1 (processing number PE3)>
Controller 500-2 sends a control signal indicating activation to circulation heater 460-2. This activates the circulation heater 460-2. This activates circulation heater 460-2 prior to circulating the medium. When the medium is circulated, the medium can be warmed precisely. The culture medium heater 456-2 is stopped.

Controller 500-2 sends a control signal to valve 422-2 indicating the open state of valve 422-2. By opening the valve 422-2, oxygen is supplied to the circulating medium from the oxygen supply module 420-2.

Controller 500-2 sends a control signal to feed pump 434-2 indicating activation. By operating the supply pump 434-2, the pH adjuster stored in the pH adjuster tank 432-2 is supplied to the circulating medium.

Controller 500-2 sends a control signal to feed pump 444-2 indicating activation. By operating the supply pump 444-2, the concentrated glucose contained in the concentrated glucose tank 442-2 is supplied to the circulating medium.

Controller 500-2 sends a control signal indicating operation to circulation pump 210-2. This activates the circulation pump 210-2. Note that the three-way valve 250-2 is in the culture medium supply state due to the addition (process number PE2) described above.

By operating the circulation pump 210-2, the culture medium stored in the culture container 110-2 is discharged to the circulation pipe 232-2 through the outlet 231-2. The culture medium (circular feeding medium) discharged to the circular feeding pipe 232-2 is the culture container 110-2 → the outlet port 231-2 → the circular feeding pipe 232-2 → the circular feeding pipe 234-2 → the circular feeding pipe 236-2. →Circulation pump 210-2→Circulation tube 238-2→Oxygen supply module 420-2→Supply tube 222-2→Circulation heater 460-2→Supply tube 224-2→Supply tube 226-2→Inlet 227-2 →Circulate like the culture container 110-2.

In subsequent treatments, oxygen supply, pH adjuster supply and glucose concentrate supply to the circulating medium are continued.

Based on the detection signal output from the liquid level sensor 318-2, the control device 500-2 outputs a control signal indicating to stop the circulation pump when the liquid level of the cell suspension becomes lower than the outlet port 231-2. 210-2. This stops the circulation pump 210-2.

<Medium exchange circulation culture treatment>
After the medium circulation preparation process (process numbers PE1 to PE3) described above, the medium exchange circulation culture process is executed.

<Discharge (processing number EX1-1)>
Controller 500-2 sends a control signal to media heater 456-2 indicating activation prior to media discharge. Media heater 456-2 is activated. This activates the medium heater 456-2 prior to circulating the medium. When the medium is circulated, the medium can be warmed precisely. Note that circulation heater 460-2 is already in operation. The culture medium heater 456-2 is stopped.

Next, control device 500-2 sends a control signal indicating the culture medium discarding state to three-way valve 250-2. As a result, the three-way valve 250-2 is placed in the culture medium discarding state.

Next, controller 500-2 sends a control signal indicating activation to circulation pump 210-2. This activates the circulation pump 210-2. By operating the circulation pump 210-2, the culture medium stored in the culture container 110-2 is discharged to the circulation pipe 232-2 through the outlet 231-2. The culture medium discharged to the circulation tube 232-2 is routed through the culture vessel 110-2→outlet 231-2→circulation tube 232-2→circulation tube 234-2→circulation tube 236-2→circulation pump 210- 2 → circulation pipe 238-2 → oxygen supply module 420-2 → supply pipe 222-2 → circulation heater 460-2 → supply pipe 224-2 → waste liquid tank 260-2 discarded. That is, the medium used to grow the cells is discarded.

Next, the control device 500-2 generates a control signal indicating stop when the liquid level of the cell suspension becomes lower than the outlet port 231-2 from the detection signal output from the liquid level sensor 318-2. to the circulation pump 210-2. As a result, circulation pump 210-2 is stopped.

<Supply (processing number EX1-2)>
Control device 500-2 sends a control signal indicating the medium supply state to three-way valve 250-2. As a result, the three-way valve 250-2 enters the culture medium supply state.

Controller 500-2 sends a control signal to media heater 456-2 indicating activation. This activates the medium heater 456-2. Circulation heater 460-2 is already in operation.

Controller 500-2 then sends a control signal to feed pump 454-2 indicating activation. As a result, the new medium stored in the medium tank 452-2 is heated by the medium heater 456-2 and discharged to the supply pipe 222-2.

The new culture medium led out to the supply pipe 222-2 passes through the circulation heater 460-2, flows through the supply pipe 224-2, and reaches the three-way valve 250-2. The new culture medium that has reached three-way valve 250-2 is guided toward supply pipe 226-2 and introduced into culture container 110-2.

Based on the detection signal output from the liquid level sensor 318-2, the control device 500-2 operates the supply pump 454-2 and the medium heater when the liquid level of the cell suspension becomes higher than the outlet port 231-2. Stop 456-2. In this manner, new medium can be supplied to culture vessel 110-2.

<Circulation 2 (processing number EX1-3)>
Controller 500-2 sends a control signal indicating operation to circulation pump 210-2. This activates the circulation pump 210-2. Note that the three-way valve 250-2 is in the culture medium supply state due to the addition (process number PE2) described above. By operating the circulation pump 210-2, the culture medium stored in the culture container 110-2 is discharged to the circulation pipe 232-2 through the outlet 231-2. The culture medium discharged to the circulation tube 232-2 is routed through the culture vessel 110-2→outlet 231-2→circulation tube 232-2→circulation tube 234-2→circulation tube 236-2→circulation pump 210- 2→Circulation tube 238-2→Oxygen supply module 420-2→Supply tube 222-2→Circulation heater 460-2→Supply tube 224-2→Supply tube 226-2→Introduction port 227-2→Culture container 110- Cycle like 2.

<Process after discharge (process number EX1-1), supply (process number EX1-2), circulation 2 (process number EX1-3)>
Similar to discharge (processing number EX1-1), supply (processing number EX1-2), and circulation 2 (processing number EX1-3), the discharge, supply, and circulation processes are repeated multiple times (EX2-1 ~ EX2-3, EX3-1 ~ EX3-3, ...).

By repeating the process of draining, feeding and circulating multiple times, the cell clump can be grown (enlarged) to the desired final stage.

<Repetition of medium discharge, medium supply, and medium circulation>
The medium is discharged, the medium is supplied, and the medium is circulated repeatedly. The number of repetitions is based on the final desired size and number of cell aggregates. The number of repetitions can be determined by a preliminary experiment or the like.

<Flow velocity by circulation pump 210-2>
The number of revolutions of the circulation pump 210-2 determines the flow rate (flow velocity) of the circulating culture medium per unit time. In the medium-exchange circulation culture process, the cell aggregates are grown to the desired final stage. The cell aggregate becomes heavy and tends to sink to the bottom of the culture container 110-2. Therefore, by increasing the rotation speed of the circulation pump 210-2 to increase the flow rate of the medium, the cell aggregates can be suspended. By floating the cell aggregates, contact with the bottom surface of the culture container 110-2 can be prevented.

The rotation speed of the circulation pump 210-2 according to the size of the cell aggregate can be determined by preliminary experiments or the like. Furthermore, the size of cell aggregates according to the elapsed time from the start of culture can also be determined by preliminary experiments or the like. Based on these relationships, the number of rotations of circulation pump 210-2 can be stored in advance in a storage unit such as an auxiliary storage device in association with the elapsed time from the start of culture.

Control device 500-2 reads the rotation speed of circulation pump 210-2 according to the elapsed time from the start of culture, and controls circulation pump 210-2. A driving motor (not shown) is rotated according to the growth of cell aggregates (the size of cell aggregates, etc.). The cell aggregates can be maintained in a suspended state and grown properly.

The pH adjuster, glucose concentrate, and dissolved oxygen content can be determined according to the type of cells, the desired aggregate size, and the like. The pH adjuster, glucose concentrate and dissolved oxygen content can also be determined by preliminary experiments and the like.

The size and number of cell aggregates may be obtained by image analysis of the data captured by the camera 320-2, and it may be determined whether or not to end the process. It is preferable to convert the captured image into an image from which the size and number of cell aggregates can be easily obtained by subjecting the captured image to various image processing.

<<<<Details of the third embodiment>>>>
A third embodiment will be described below with reference to the drawings. FIG. 8 is a block diagram showing details of the culture system 1-3 according to the third embodiment. FIG. 9 is a time chart showing an outline of processing of the culture system 1-3. The dashed lines with arrows shown in FIG. 8 indicate the input and output of control-related signals. The two regions enclosed by broken lines in FIG. 8 are the light shielding portion SP indicating the components to be shielded from light and the cooling portion CP indicating the cooled components.

<<<Configuration of Culture System 1-3>>>
In FIG. 8, the same symbols are assigned to the same components as those of the culture system 1-2 according to the second embodiment shown in FIG. A configuration different from the culture system 1-2 according to the second embodiment will be described.

In the culture system 1-2 according to the second embodiment, as the adjusting device 400-2, the pH adjusting agent supply unit 430-2 (the pH adjusting agent tank 432-2 and the supply pump 434-2) and the concentrated glucose supply 440-2 (glucose concentrate tank 442-2 and feed pump 444-2). On the other hand, the culture system 1-3 according to the third embodiment has a device that replaces the pH adjuster supply section 430-2 and the glucose concentrate supply section 440-2.

Also, the culture system 1-2 according to the second embodiment is a system that is controlled according to predetermined conditions in a preliminary experiment or the like. On the other hand, the culture system 1-3 according to the third embodiment images cells and cell aggregates cultured in the culture container 110-2 with the camera 320-2. This system acquires the size of cell aggregates from imaging data and determines the timing of culturing. The culture conditions, especially the stirring conditions and stirring speed may be determined depending on the size of the obtained cell aggregates.

<<adjustment device 400-3>>
Adjusting device 400-3, instead of pH adjusting agent supply unit 430-2 and glucose concentrate supply unit 440-2,
a dialysis module 472-3;
a dialysis circulation pump 474-3;
a dialysis supply pump 476-3;
a dialysate tank 478-3;
have

Note that the adjustment device 400-3 is
Medium supply unit 450-2
Medium tank 452-2
Feed pump 454-2
Medium heater 456-2
Circulation heater 460-2
also have These have the same configuration as the culture system 1-2 according to the second embodiment, and function similarly.

<Dialysis module 472-3>
The dialysis module 472-3 removes by filtering waste products discharged with the growth of the cells in the culture container 110-2, and extracts components necessary for the growth of the cells (for example, glucose, amino acids, vitamins, inorganic salts, etc.) to the medium. A dialysis module 472-3 is placed in the middle of the loop 238-2.

<Dialysis circulation pump 474-3>
The dialysis circulation pump 474-3 delivers the liquid from which the waste products have been removed in the dialysis module 472-3 to the dialysate tank 478-3.

<Dialysis supply pump 476-3>
Dialysis supply pump 476-3 supplies dialysate stored in dialysate tank 478-3 to dialysis module 472-3. This allows the medium to be supplied with the components necessary for cell growth.

<Dialysate tank 478-3>
A dialysate is stored in the dialysate tank 478-3. The dialysate contains sufficient amounts of glucose, amino acids, vitamins, inorganic salts, and the like. For example, the dialysate can be DMEM, DMEMHG, EMEM, IMDM (Iscove's Modified Dulbecco's Medium), GMEM (Glasgow's MEM), RPMI-1640, α-MEM, Ham's Medium F-12, Ham's Medium F- 10, Ham's Medium F12K, and so on. Furthermore, additives such as amino acids, vitamins, inorganic salts, proteins (growth factors), glucose, antibiotics, signal transduction inhibitors, reducing agents, and buffers may be added.

In the culture system 1-2 according to the second embodiment, a pH adjuster and a glucose concentrate are added to the circulating medium as components necessary for cell growth. On the other hand, in the culture system 1-3 according to the third embodiment, the dialysis module 472-3 is used to operate the dialysis circulation pump 474-3 and the dialysis supply pump 476-3. As a result, wastes and the like contained in the culture medium can be removed through the dialysis module, while nutrients and the like contained in the dialysate can be added to the culture medium.

<<Light shielding part SP>>
As shown in FIG. 8, a culture vessel 110-2, a ring feeding tube 232-2, a ring feeding tube 234-2, a ring feeding tube 236-2, a ring feeding tube 238-2, and cell-medium separation Filter 120-2, sampling port 130-2, dialysis module 472-3, oxygen supply module 420-2, supply tube 222-2, supply tube 224-2, supply tube 226-2, dialysis The liquid tank 478-3 and the culture medium supply section 450-2 are shielded from light by a light shielding member (light shielding portion SP). By shielding the light, it is possible to prevent photodegradation and decomposition of additives and the like, and to improve the accuracy of monitoring results by the monitoring unit 30, for example, the accuracy of measurement of culture medium components and imaging.

<<Cooling part CP>>
The dialysate tank 478-3 and the culture medium tank 452-2 are cooled by a low temperature constant temperature bath (cooling portion CP). By cooling the dialysate tank 478-3 and the culture medium tank 452-2, it is possible to prevent deterioration and decomposition of additives and the like.

<<<processing of culture system 1-3>>>
FIG. 9 is a time chart showing an outline of processing of the culture system 1-3. The processing of culture system 1-3 uses dialysis module 472-3 and camera 320-2. In the following description, processing similar to that of the culture system 1-2 will be omitted.

As described above, the camera 320-2 images cells and cell aggregates cultured in the culture container 110-2. The size of the cell aggregates and the like can be obtained from the imaging data captured by the camera 320-2.

As shown in FIG. 9, the processes up to the intermittent agitation culture process (processing numbers IN1 and after) and the medium addition preparation process (PA1) are the same as in the culture system 1-2.

<<Processing by Camera Monitoring>>
The control device 500-2 executes processing by camera monitoring from the medium addition preparation processing (AD1-) to the end. Processing by camera monitoring is processing using the size of the cell aggregate acquired from the imaging data captured by the camera 320-2.

The control device 500-2 determines whether or not the size of the cell aggregate is equal to or greater than a predetermined size, and if the size of the cell aggregate is equal to or greater than the predetermined size, the are used to control the rotational speed (stirring speed) of the driving motor 614-2 of the stirring device 600-2 and the flow rate of the circulation pump 210-2. By doing so, suitable control can be performed according to the growth of the cell aggregate.

<<<processing using dialysis module 472-3>>>
From the medium circulation preparation process (PE2~) to the end, the controller 500-2 operates using the glucose concentration, lactate concentration, and pH monitoring the dialysis circulation pump 474-3 and the dialysis supply pump 476-3 as indices. Let For example, the dialysis circulation pump 474-3 and the dialysis supply pump 476-3 are operated according to the flow rate, glucose concentration, lactate concentration, and pH of the circulation pump 210-2. By doing so, glucose, amino acids, vitamins, inorganic salts, etc. can be added to the medium according to the flow rate of the medium.

<<<<Scope of Embodiment>>>>
As described above, a first embodiment and a third embodiment have been described. However, the description and drawings forming part of this disclosure should not be understood as limiting. Various embodiments and the like not described here are included.

<<<<embodiment of the invention>>>>
<<First Aspect>>
According to a first aspect of the culture system,
A culture system for forming cell aggregates by liquid culture,
a culturing unit containing a liquid and having an outlet for drawing out the liquid and an inlet for introducing the liquid;
a path part that enables fluid communication between the outlet and the inlet;
a monitoring unit capable of monitoring a component in the liquid and/or properties of the liquid in at least one of the culturing unit and the path unit;
an adjustment unit capable of adjusting the components in the liquid and/or the properties of the liquid in at least one of the culture unit and the path unit;
and a control unit capable of controlling the adjustment unit based on the monitoring result of the monitoring unit.

The components in the liquid and the properties of the liquid are monitored, and the components in the liquid and the properties of the liquid are adjusted based on the monitoring results, so cells can be grown accurately to form cell aggregates.

<<Second aspect>>
A second aspect of the culture system is, in the first aspect,
further comprising a stirring unit for stirring the liquid in the culture unit;
The control section controls the stirring section based on predetermined stirring conditions.

<<Third Aspect>>
A third aspect of the culture system is, in the second aspect,
The liquid culture is suspension culture in which cells are suspended in a liquid by agitation by the agitator.

<<Fourth Aspect>>
A fourth aspect of the culture system is, in the second aspect,
The stirring section has a movable body that causes the liquid to flow.

<<Fifth Aspect>>
A fifth aspect of the culture system is, in the second aspect,
The stirring section has a shaking mechanism for shaking the culturing section.

<<Sixth Aspect>>
A sixth aspect of the culture system is, in the second aspect,
The predetermined stirring conditions are predetermined conditions based on cell nucleation and cell aggregate size.

The monitoring unit monitors at least one of the components in the liquid and the properties of the liquid. As a result of the monitoring, the monitoring unit outputs various information such as at least one property information, at least one component information, and size information regarding the size of the cell aggregate. Predetermined stirring conditions are determined based on various information output from the monitoring unit.

For example, the monitoring unit has an imaging unit that images a cell aggregate, as described later. The imaging unit outputs size information that can determine the size of the cell aggregate. The control unit acquires the size information output by the monitoring unit. The controller can determine the size of the cell aggregate from the size information. The controller determines predetermined stirring conditions based on the size of the cell aggregates. For example, the stirring speed is determined according to the size of the cell aggregates.

Stirring can be performed to the extent that the shear stress applied to the cell aggregates is not increased (to the extent that the once formed cell aggregates are not broken) while increasing the possibility of contact between cells.

<<Seventh Aspect>>
A ninth aspect of the culture system is, in the first to sixth aspects,
A constant temperature bath capable of accommodating at least a part of the culturing section and the path section is further provided.

Cell aggregates can be grown accurately in a stable environment.

<<Eighth aspect>>
An eighth aspect of the culture system is, in the first to seventh aspects,
An external heater capable of externally heating the liquid in the culturing section and the path section is further provided.

Warming the liquid with an external heater can provide a suitable environment for the formation of cell clumps.

<<Ninth Aspect>>
A ninth aspect of the culture system is, in the first to eighth aspects,
The outlet is higher than the liquid level at the start of culture.

A filter, physical mechanism, or the like can prevent ungrown cells or small cell aggregates from exiting the outlet.

<<Tenth Aspect>>
A tenth aspect of the culture system is, in the first to ninth aspects,
The monitoring unit is capable of outputting property information of at least one of information on the temperature of the liquid, information on the hydrogen ion concentration of the liquid, and information on the concentration of dissolved oxygen in the liquid as the information on the properties of the liquid. can be,
The control unit acquires the at least one property information output by the monitoring unit.

The monitoring unit can control the adjusting unit, the stirring unit, and the like using at least one property information acquired.

<<Eleventh Aspect>>
An eleventh aspect of the culture system is, in the first to tenth aspects,
The monitoring unit is capable of outputting at least one component information among information on electrolytes, information on amino acids, information on glucose, and information on lactic acid as information on components in the liquid,
The control unit acquires the at least one component information output by the monitoring unit.

The monitoring unit can control the adjustment unit, the stirring unit, and the like using the acquired at least one component information.

<<Twelfth Aspect>>
A twelfth aspect of the culture system is, in the first to eleventh aspects,
The monitoring unit is capable of outputting size information regarding the size of cell aggregates in the culture unit,
The control unit acquires the size information output by the monitoring unit.

The monitoring unit can use the acquired size information to control the adjustment unit, the stirring unit, and the like.

<<Thirteenth Aspect>>
A thirteenth aspect of the culture system according to the twelfth aspect,
The monitoring unit has an imaging unit that images the cell aggregate in the culture unit,
The control unit acquires the size of the cell aggregate from the imaging data of the cell aggregate as the size information.

<<14th Aspect>>
A fourteenth aspect of the culture system is, in the first to thirteenth aspects,
The adjusting unit has a component applying unit for applying necessary components to the liquid and/or a component removing unit for removing unnecessary components from the liquid,
Aspects 1 to 13, wherein the control unit controls the component applying unit and/or the component removing unit based on the monitoring result of the monitoring unit, and adjusts the components in the liquid and/or the properties of the liquid. The culture system according to any one of .

The control unit controls the component applying unit and the component removing unit based on the monitoring result output by the monitoring unit. The components in the liquid and the properties of the liquid can be adjusted by controlling the component applying section and the component removing section. By adjusting the components in the liquid and the properties of the liquid, the environment of the culture section can be made suitable for the growth of cell aggregates.

<<Fifteenth Aspect>>
A fifteenth aspect of the culture system is, in the first to fourteenth aspects,
The adjustment section has a gas exchange membrane capable of supplying gas components necessary for culture to the liquid.

By supplying gaseous components necessary for culture, the environment of the culture section can be brought into a state suitable for the growth of cell aggregates.

<<Sixteenth Aspect>>
A sixteenth aspect of the culture system according to the fifteenth aspect,
The gas exchange membrane is a hollow fiber gas exchange membrane made of any one of silicone, polypropylene, polytetrafluoroethylene and polymethylpentene.

Since a hollow fiber gas exchange membrane is used, it is possible to use the system for a long period of time with a homogeneous membrane that is less prone to clogging, and the size of the system can be reduced.

<<Seventeenth Aspect>>
A seventeenth aspect of the culture system is, in any of the first to sixteenth aspects,
The adjustment unit has a dialysis membrane.

Since the adjustment part has a dialysis membrane, the medium can be used continuously for a long period of time.

<<Eighteenth Aspect>>
An eighteenth aspect of the culture system is, in any of the first to seventeenth aspects,
The control section controls the adjustment section based on the monitoring result of the monitoring section to add a pH adjuster to the liquid to adjust the hydrogen ion concentration of the liquid.

The hydrogen ion concentration can be maintained within a range suitable for cell culture.

<<Nineteenth Aspect>>
A nineteenth aspect of the culture system is, in any of the first to eighteenth aspects,
The monitoring unit can further output information about the carbon dioxide concentration in the gas in contact with the liquid,
The control unit controls the adjustment unit to supply carbon dioxide and adjust the hydrogen ion concentration of the liquid based on the information on the carbon dioxide concentration from the monitoring unit.

By also using information about the carbon dioxide concentration, the environment for culturing cells can be maintained accurately.

<<Twentieth Aspect>>
A twentieth aspect of the culture system is, in any of the first to nineteenth aspects,
The adjustment unit has a flow rate adjustment unit that adjusts the flow rate of each component for adjustment,
The control section controls the flow rate adjusting section based on the monitoring result of the monitoring section.

Since the flow rate can be adjusted for each component, the components necessary for the growth of cell aggregates can be supplied to the culturing section in just the right amount.

<<21st Aspect>>
A twenty-first aspect of the culture system is, in any of the first to twentieth aspects,
The adjuster is provided on a detachable panel.

By providing the adjuster on the detachable panel, it is possible to facilitate replacement work of members and parts related to the adjuster.

<<22nd Aspect>>
A twenty-second aspect of the culture system is, in any of the first to twenty-first aspects,
A waste section 70 capable of discharging liquid from the path section is further provided.

Since the liquid can be discharged to the waste section 70, the components in the liquid contained in the culture section and the properties of the liquid can be adjusted only to those required for the growth of the cell aggregates. It is possible to appropriately adjust the amount of liquid to be accommodated in the culture section.

<<23rd Aspect>>
A twenty-third aspect of the culture system, according to the twenty-second aspect,
further comprising a discharge mechanism 72 for discharging the liquid from the path portion to the disposal portion 70,
The control section controls the discharge mechanism 72 to flow the liquid in the culture section to the path section as circulation priming, and then discharge it to the disposal section 70 .

Since the liquid in the culture section is made to flow to the path section as circulation priming and discharged, the liquid in the culture section can be effectively utilized.

<<24th Aspect>>
A twenty-fourth aspect of the culture system is, in any of the first to twenty-third aspects,
The control unit controls the components in the liquid and/or the properties of the liquid to a predetermined value or within a predetermined range based on the monitoring result of the monitoring unit.

The cell aggregates can continue to grow appropriately depending on the degree of growth of the cell aggregates and the state of the liquid.

<<25th Aspect>>
A twenty-fifth aspect of the culture system is, in any of the first to twenty-fourth aspects,
The control unit controls the adjustment unit to increase the amount of liquid in the culturing unit from the amount of liquid at the start of culturing based on the progress of culturing.

Since the amount of the liquid is determined according to the size of the cells and the degree of growth of the cell aggregates, it is possible to prevent the cells and cell aggregates from being drawn out from the culture section and prevent the cells and cell aggregates from remaining in the culture section. cell aggregates can be grown.

<<26th Aspect>>
A twenty-sixth aspect of the culture system is according to the twenty-fifth aspect,
The control unit
When the amount of liquid in the culture section is the amount of liquid at the start of the culture, the stirring section is alternately switched between first stirring control and second stirring control different from the first stirring control. A first process for controlling is executed.

By repeating both a state in which cells are easily brought into contact with each other to facilitate the formation of cell aggregates and a state in which the formed cell aggregates are stabilized, the cell aggregates are grown accurately in the culture section. be able to.

<<27th Aspect>>
A twenty-seventh aspect of the culture system is according to the twenty-sixth aspect,
The control unit
After the first processing, a second processing is executed in which the stirring section is operated by the first stirring control and the amount of liquid in the culturing section is adjusted stepwise by the adjusting section.

The cell aggregates can be gradually grown according to the size of the cell aggregates so that the cell aggregates grow close to a size that does not lead out from the culture section.

<<28th Aspect>>
A twenty-eighth aspect of the culture system is according to the twenty-seventh aspect,
The control unit controls the adjustment unit to
After the second process, when the liquid level of the liquid in the culture section is higher than the outlet, a third process of exchanging the liquid via the path section is performed.

The cell aggregates can be grown to a size that is not pulled out from the culture section, and by circulating the liquid, the cell aggregates can be grown to a final desired size.

1, 1-1, 1-2, 1-3 Culture system 100-1, 100-2 Culture device 200-1, 200-2 Path structure 300-1, 300-2 Monitoring device 400-1, 400-2 Adjusting device 500-1, 500-2 Control device 600-1, 600-2 Stirring device

Claims (3)

A culture system for forming cell aggregates by liquid culture,
a culturing unit containing a liquid and having an outlet for drawing out the liquid and an inlet for introducing the liquid;
a path part that enables fluid communication between the outlet and the inlet;
a monitoring unit capable of monitoring a component in the liquid and/or properties of the liquid in at least one of the culturing unit and the path unit;
an adjustment unit capable of adjusting the components in the liquid and/or the properties of the liquid in at least one of the culture unit and the path unit;
a control unit capable of controlling the adjustment unit based on the monitoring result of the monitoring unit;
a stirring unit for stirring the liquid in the culture unit,
The control unit controls the stirring unit based on predetermined stirring conditions,
The liquid culture is a suspension culture in which cells in a liquid are suspended by agitation by the agitator,
The control unit controls the adjustment unit to make the amount of liquid in the culture unit larger than the amount of liquid at the start of culture based on the progress of culture,
The control unit alternately performs first stirring control and second stirring control different from the first stirring control when the amount of liquid in the culturing unit is the amount of liquid at the start of the culturing. performing a first process of switching to control the stirring unit;
The culture system , wherein the outlet is higher than the liquid level at the start of the culture . The control unit
After the first processing, a second processing is executed in which the stirring unit is operated by the first stirring control and the amount of liquid in the culture unit is adjusted stepwise by the adjusting unit. Item 1. The culture system according to item 1. The control unit controls the adjustment unit to
3. The method according to claim 2, wherein after said second process, when the liquid level of said culture unit is higher than said outlet, a third process of exchanging said liquid via said path is performed. culture system.

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