WO2015178413A1 - 細胞塊用培養容器 - Google Patents
細胞塊用培養容器 Download PDFInfo
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- WO2015178413A1 WO2015178413A1 PCT/JP2015/064444 JP2015064444W WO2015178413A1 WO 2015178413 A1 WO2015178413 A1 WO 2015178413A1 JP 2015064444 W JP2015064444 W JP 2015064444W WO 2015178413 A1 WO2015178413 A1 WO 2015178413A1
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/02—Form or structure of the vessel
- C12M23/12—Well or multiwell plates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
- B01L3/508—Containers for the purpose of retaining a material to be analysed, e.g. test tubes rigid containers not provided for above
- B01L3/5085—Containers for the purpose of retaining a material to be analysed, e.g. test tubes rigid containers not provided for above for multiple samples, e.g. microtitration plates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F18/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid
- C08F18/02—Esters of monocarboxylic acids
- C08F18/04—Vinyl esters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F18/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid
- C08F18/22—Esters containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D131/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
- C09D131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09D131/04—Homopolymers or copolymers of vinyl acetate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D131/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
- C09D131/06—Homopolymers or copolymers of esters of polycarboxylic acids
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/20—Material Coatings
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/06—Animal cells or tissues; Human cells or tissues
- C12N5/0602—Vertebrate cells
- C12N5/067—Hepatocytes
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/06—Animal cells or tissues; Human cells or tissues
- C12N5/0602—Vertebrate cells
- C12N5/0693—Tumour cells; Cancer cells
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/02—Adapting objects or devices to another
- B01L2200/028—Modular arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/06—Fluid handling related problems
- B01L2200/0647—Handling flowable solids, e.g. microscopic beads, cells, particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/08—Geometry, shape and general structure
- B01L2300/0809—Geometry, shape and general structure rectangular shaped
- B01L2300/0829—Multi-well plates; Microtitration plates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/08—Geometry, shape and general structure
- B01L2300/0848—Specific forms of parts of containers
- B01L2300/0851—Bottom walls
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2533/00—Supports or coatings for cell culture, characterised by material
- C12N2533/30—Synthetic polymers
Definitions
- the present disclosure relates to a cell mass culture vessel and a cell mass culture method using the same.
- This application claims priority based on Japanese Patent Application No. 2014-106450 filed in Japan on May 22, 2014, and Japanese Patent Application No. 2014-218661 filed in Japan on October 27, 2014. The contents thereof are incorporated herein.
- Embryonic stem cells have multipotency to differentiate into various tissue cells. For this reason, various studies have been conducted for application in the field of so-called regenerative medicine, in which cells lost due to illness or accidents are repaired and tissues are repaired (for example, Patent Document 1).
- ES cells have a variety that can be differentiated into various cells.
- One technique for differentiating into various cells is the formation of a cell mass called an embryonic body (EB).
- EB embryonic body
- This cell mass is formed by suspension culture of ES cells, iPS cells, and the like, and when cultured for about 2 weeks in a state where the cell mass is formed, differentiation into various cell types is observed. For this reason, the formation of embryoid bodies is used as one of the general methods for examining the pluripotency of cells.
- the hanging drop culture is a method of culturing cells in a culture solution suspended in a water droplet shape.
- this method has problems such as a low success rate of embryoid body formation, inability to observe with a microscope, and complicated operation.
- a culture container in which a water-soluble resin film is cured on the inner surface of the container to form a water-insoluble cured film has been proposed (for example, Patent Document 2).
- Patent Document 1 Japanese Patent Laid-Open No. 2008-99662
- Patent Document 2 Japanese Patent Laid-Open No. 2008-178367
- Patent Document 3 WO 2013/183777
- the cell mass formed using the above culture container or the like may be transferred to a petri dish or the like for further culture (Non-patent Document 1).
- the culture solution is made acidic by wastes such as uric acid and carbon dioxide discharged from the cells
- the culture solution in the petri dish needs to be periodically replaced.
- the petri dish is shaken with periodic exchange of the culture solution, the cell mass collects in the center of the petri dish, the cell masses come into contact with each other and fuse together, the cell mass becomes too large, or the cell mass There is a possibility that oxygen and nutrients are not sufficiently supplied to the cells constituting the cell mass due to the distorted shape, and the cells die. Also, normal cells are damaged by the enzyme released by the dead cells.
- stem cells such as human embryonic stem cells (human ES cells) and human pluripotent stem cells (human iPS cells) have a good metabolism, so the frequency of culture medium exchange is higher than that of other cells. Therefore, it is desirable that the culture medium can be efficiently exchanged especially for these cells.
- the present disclosure provides a culture vessel that has little influence on a cell mass and can efficiently exchange a culture solution, and a method for culturing a cell mass using the culture vessel.
- the present disclosure relates to a container for culturing a cell mass in one or a plurality of embodiments.
- the cell mass culture vessel includes a well having a culture space capable of accommodating the cell mass and a culture solution, and a cylindrical body having a lumen communicating with the culture space.
- One or more communication portions are formed on the wall so that the culture solution can be discharged without passing the cell mass outside the tubular body.
- This disclosure is a culturing method for culturing a cell mass using the cell mass culture container of the present disclosure in one or a plurality of embodiments.
- the method of culturing the cell mass comprises culturing the cell mass in the well filled with a culture solution, and then tilting the cell mass culture container to remove a part of the culture solution in the well. And a step of passing through the communicating portion and discharging to the outside of the cylindrical body.
- the culture solution can be efficiently exchanged with little influence on the cell mass.
- FIG. 3 is a plan view of the cell mass culture vessel of Embodiment 1.
- FIG. 2 is a cross-sectional view taken along line II-II ′ of FIG. 1A.
- FIG. 3 is a cross-sectional view taken along the line III-III ′ of FIG. 1A.
- FIG. 3 is a partially enlarged view of FIG. 2.
- 6 is a plan view of a cell mass culture vessel of Embodiment 2.
- FIG. 6 is an enlarged cross-sectional view taken along the line VI-VI ′ of FIG. 5.
- FIG. 7 is an enlarged end view taken along the line VII-VII ′ of FIG. 5.
- FIG. 6 is a plan view of a multi-well plate body that constitutes a cell mass culture vessel of Embodiment 2.
- FIG. FIG. 9 is a cross-sectional view taken along line IX-IX ′ in FIG. 8.
- 6 is a plan view of a liquid flow control body constituting the cell mass culture vessel of Embodiment 2.
- FIG. 11 is an enlarged cross-sectional view taken along the line XII-XII ′ of FIG. 10.
- It is an enlarged side view of the liquid flow control body shown in FIG.
- It is an expansion perspective view of the liquid flow control body shown in FIG. 6 is a plan view of a cell mass culture container of Embodiment 3.
- FIG. 15B is an enlarged cross-sectional view taken along the line XVI-XVI ′ of FIG. 15A.
- FIG. 15B is an enlarged cross-sectional view taken along the line XVII-XVII ′ of FIG. 15A.
- It is the elements on larger scale of FIG. It is a perspective sectional view explaining the internal structure of the structure which consists of a cylindrical body and well of the culture container for cell aggregates shown to FIG. 15A. It is the elements on larger scale of FIG. 15A.
- FIG. 15A is a plan view of a cell mass culture container of Embodiment 4.
- FIG. FIG. 22B is a partially enlarged view of FIG. 22A.
- FIG. 22B is an enlarged sectional view taken along the line XXIII-XXIII ′ of FIG. 22A.
- FIG. 22B is an enlarged sectional view taken along the line XXIV-XXIV ′ in FIG. 22A. It is the elements on larger scale of FIG. 24A. It is the elements on larger scale of FIG.
- FIG. 22A It is a perspective sectional view explaining the internal structure of the structure which consists of a cylindrical body and well of the culture container for cell aggregates shown to FIG. 22A. It is a conceptual diagram explaining the state after draining a part of culture solution in a well, after culture
- the cell mass culture container of the present disclosure (hereinafter sometimes abbreviated as “culture container”) has a lumen communicating with the culture space of the well, and allows the cell mass to pass outside through the cylindrical wall. It has a cylindrical body in which one or more communicating portions that can discharge the culture solution without being formed are formed. Therefore, the culture solution in the plurality of wells can be discharged from the culture space in a short time by a simple operation of tilting the culture vessel. If the culture medium is discharged by such a method, the culture medium can be efficiently exchanged without adversely affecting the cell mass as compared with the method described as the prior art. Since the culture solution in a plurality of wells can be discharged from the culture space, automatic replacement of the culture solution by a machine can be expected.
- stem cells such as human embryonic stem cells (human ES cells) and human pluripotent stem cells (human iPS cells) are well metabolized and may be differentiated by slight stimulation. Therefore, the culture vessel of the present disclosure that can efficiently exchange the culture solution while suppressing the influence of damage, stimulation, etc. on the cell mass is suitable for culturing the cell mass of these stem cells.
- a container for culturing a cell mass which is disposed on a surface having a culture space capable of accommodating the cell mass and a culture solution and has an opening of the well, and communicates with the culture space
- One or more communicating portions that can discharge the culture solution without allowing the cell mass to pass outside the cylindrical body on the cylindrical wall of the cylindrical body.
- a formed cell culture container (2) The culture vessel for a cell mass according to (1), wherein a plurality of the communication portions are formed on the cylindrical body.
- (6) When the structure composed of the well and the cylindrical body is cut in a plane including its central axis and viewed in a plane, one end of the slit closer to the well is closer to the well.
- the cell mass culture container includes a multi-well plate body including a plurality of wells, and the plurality of cylindrical bodies are arranged on a surface of the multi-well plate having openings of the wells.
- the cell mass culture container includes a plurality of the wells, and a side wall having a substantially rectangular shape that projects upward from the opening of the well and surrounds the plurality of wells when viewed in a plan view.
- a plate body and a liquid flow control body disposed in a space surrounded by the side wall of the multiwell plate, the liquid flow control body comprising the plurality of cylindrical bodies, and the multiwell plate main body.
- a plurality of bridging portions arranged so as not to contact the surface having the opening of the well and connecting the plurality of cylindrical bodies to form a connection body of the plurality of cylindrical bodies, and one end portion of the connection body And at least one pair of position restricting portions whose other end abuts against the side wall, and one position restricting portion abuts on one of the inner surfaces of the side walls facing each other and on the other inner surface of the side walls facing each other.
- Position regulating portion of the square is in contact, (1) cell mass for culture container according to any one of the - (6).
- (11) The cell mass culture container according to (10), wherein the liquid flow control body is separate from the multi-well plate body.
- a liquid guiding part is further included, and the liquid guiding part includes a pair of projecting parts disposed on an inner surface of the structure including the well and the cylindrical body, and the projecting part has a liquid guiding auxiliary groove.
- the cell mass culture container according to any one of (1) to (11), wherein the upper end surface of the protruding portion is formed above the lower end of the communicating portion.
- the distance between the pair of protrusions on the circumference passing through the lower end of the communication portion is 0.3 mm or more and 1.0 mm or less, according to any one of (12) to (14) Cell culture vessel.
- the liquid guide part further includes a base part that connects the lower end parts of the pair of projecting parts to each other and includes a surface that defines one end of the liquid guide auxiliary groove.
- the culture vessel for cell mass according to any one of the above.
- the surface that defines one end of the liquid guiding auxiliary groove is an inclined surface that is inclined from the downstream side to the upstream side of the flow of the culture solution that can flow into the culture space from the communication portion.
- the culture vessel for cell mass according to (17).
- (19) The cell mass culture container according to any one of (12) to (18), wherein the closed end of the liquid guiding auxiliary groove is located above the bottom of the well.
- the well has a cylindrical body part and a funnel-shaped bottom part provided at one end of the body part, the center part of the bottom part is a concave curved surface, and the opening angle of the bottom part is 60 to 100 degrees, and the radius of curvature of the conca
- the stem cells are human embryonic stem cells (human ES cells) or human pluripotent stem cells (human iPS cells).
- a container for culturing a cell mass, a well having a culture space capable of accommodating the cell mass and a culture solution, a tubular body having a lumen communicating with the culture space, and a liquid And one or more communication parts that can discharge the culture solution without allowing the cell mass to pass outside the cylindrical body is formed on the cylindrical wall of the cylindrical body,
- the liquid guiding portion has a pair of protrusions formed on the inner surface of the structure including the well and the cylindrical body, and the upper end surface of each protrusion is disposed above the lower end of the communication portion.
- a cell mass culture vessel comprising a liquid guiding auxiliary groove provided by forming the protrusions on both sides of at least one communicating portion of the inner surface of the cylindrical portion.
- the liquid guide portion further includes a base portion that connects the lower end portions of the projecting portions to each other and includes a surface that defines one end of the liquid guide auxiliary groove.
- the cell mass culture container according to any one of the items.
- the surface that defines one end of the liquid guiding auxiliary groove is an inclined surface that is inclined from the downstream side to the upstream side of the flow of the culture solution that can flow into the culture space from the communication portion.
- the cell mass culture vessel according to [9].
- the length from the lower end of the communicating portion to the deepest portion of the well is The culture vessel for cell mass according to any one of [1] to [10], which is 3.0 mm or more and 6.0 mm or less.
- the well has a cylindrical body part and a funnel-shaped bottom part provided at one end of the body part, the center part of the bottom part is a concave curved surface, and the opening angle of the bottom part is 60 to 100 degrees, and the radius of curvature of the concave curved surface at the bottom is 0.5 to 2.0 mm, according to any one of items [1] to [11].
- the cell mass culture vessel includes a multi-well plate body including a plurality of wells, and the plurality of cylindrical bodies are arranged on a surface of the multi-well plate having openings of the wells.
- [1] to [13] The cell mass culture vessel according to [13].
- [15] The cell mass culture container according to [14], wherein the multi-well plate body and the plurality of cylindrical bodies are molded in the same mold.
- the inner surface of at least the bottom of the well is covered with a coating layer formed using a water-soluble resin represented by the following formula (Ia) or (Ib). Cell culture vessel.
- R represents an alkyl group having a carbonyl and an amine, r1 represents 1 to 1000, r2 represents 40 to 4995, r3 represents 0 to 4000, and n represents 1, 2 or 3.
- R represents an alkyl group having a carbonyl and an amine, r1 represents 1 to 1000, r2 represents 40 to 4995, and r3 represents 0 to 4000.
- FIG. 1A is a plan view of the cell mass culture vessel of Embodiment 1
- FIG. 1B is a partially enlarged view of FIG. 1A
- 2 is a cross-sectional view taken along the line II-II ′ in FIG. 1A
- FIG. 3 is a cross-sectional view taken along the line III-III ′ in FIG. 1A
- FIG. FIG. 1A is a plan view of the cell mass culture vessel of Embodiment 1
- FIG. 1B is a partially enlarged view of FIG. 1A.
- 2 is a cross-sectional view taken along the line II-II ′ in FIG. 1A
- FIG. 3 is a cross-sectional view taken along the line III-III ′ in FIG. 1A
- the culture container 1 is a container for culturing a cell mass.
- the culture container 1 includes a plurality of wells 21 formed in the plate-like body 2 and a cylindrical body 3 disposed above each well 21.
- the direction perpendicular to the plane of the plate-like body 2 is referred to as “vertical direction”
- the cylindrical body 3 side is referred to as “upward”
- the well 21 side is referred to as “downward”.
- the culture container 1 of Embodiment 1 includes a side wall 4 that protrudes upward from the openings of the plurality of wells 21 and surrounds the plurality of wells 21, and a pedestal 5 that protrudes downward from the openings of the plurality of wells 21.
- the shape of the outer surface and the inner surface of the side wall 4 visible when the culture vessel 1 is viewed in plan is substantially rectangular. Since the pedestal 5 protrudes farther from the plate-like body 2 than the well 21, the end surface of the pedestal 5 is in contact with the horizontal plane when the culture vessel 1 is placed on the horizontal plane.
- Each well 21 has a culture space that can accommodate a cell mass and a culture solution.
- the shape of the cylindrical body 3 is substantially cylindrical, and has a lumen communicating with the culture space.
- a plurality of communication portions 3 a are formed at equal intervals along the circumferential direction of the cylindrical body 3 on the cylindrical wall 3 b of the cylindrical body 3.
- the communication part 3a is a slit formed from the base end 3d of the cylindrical body 3 to the front end 3e in parallel with the central axis 3c (see FIG. 4) of the cylindrical body 3.
- the central axis 3c of the cylindrical body 3 is parallel to the vertical direction.
- the slit is not limited to the above example.
- the slit may be formed from above the base end 3 d of the cylindrical body 3 toward the distal end 3 e of the cylindrical body 3.
- the slit may be a through hole that penetrates the cylindrical wall of the cylindrical body 3 in the thickness direction and whose longitudinal direction extends along the circumferential direction of the cylindrical body 3.
- the communication part 3a is not limited to a slit,
- the through-hole which penetrates the cylinder wall 3b of the cylindrical body 3 in the thickness direction may be sufficient.
- the number of communication portions 3a is eight, but the number of communication portions 3a is not particularly limited. However, two or more are preferable, and four or more are more preferable, because it is easy to efficiently discharge the culture medium from each well 21 and a fresh culture medium described later easily spreads uniformly in each well. More than the number is more preferable.
- the pair of communication portions 3a selected from the two or more communication portions 3a is provided in the circumferential direction because the culture medium is efficiently discharged. Is preferably 90 degrees or more, and more preferably 180 degrees or more.
- the slit width W1 may be smaller than the diameter measured by microscopic observation of the cell mass immediately before being transferred to the culture container 1 of Embodiment 1.
- the diameter of the cell mass is 600 to 700 ⁇ m, it is preferably 0.1 mm or more, more preferably 0.2 mm or more, further preferably 0.25 mm or more, from the viewpoint of improving the discharge efficiency of the culture solution. From the viewpoint of reducing the possibility of outflow, 0.5 mm or less is preferable, 0.4 mm or less is more preferable, and 0.3 mm or less is still more preferable.
- the width of the slit is the central axis 3c of the cylindrical body 3 (see FIG. 4).
- the liquid level of the culture solution is the same as that of the cylindrical body 3 from the viewpoint of uniformizing the quality of the culture solution in the plurality of wells 21 by diffusion using the communication part 3a. It is preferable to be higher than the base end 3d.
- the cell mass floats in the culture solution and moves beyond the tip of the cylindrical body 3 between the cylindrical body 3 and the side wall 4 or into the adjacent cylindrical body 3 and well 21.
- the height H1 of the cylindrical body 3 is preferably 1 to 7 mm, and more preferably 3 to 5 mm so that there is no possibility.
- the openings of the plurality of wells 21 are in the same plane as the one surface 2a (see FIG. 2) of the plate-like body 2 connecting the plurality of wells 21, and the cylindrical body 3 is disposed on the plane. .
- the slit which is the communication part 3a is preferably formed from the base end 3d (see FIG. 4) of the cylindrical body 3 from the viewpoint of improving the discharge efficiency of the culture solution.
- the inner surface of the structure 12 (see FIGS. 3 and 4) composed of the cylindrical body 3 and the well 21. More specifically, the central axis 3c of the cylindrical body 3 and the central axis of the well 21 coincide with each other, the radius of the cylindrical surface that is the inner peripheral surface of the cylindrical body 3, and the well 21 It is preferable that the radius at the opening is equal. Further, for example, when the well 21 includes a cylindrical body 21a (see FIG. 4) and the inner surface of the body 21a is a cylindrical surface, the central axis 3c of the cylindrical body 3 and the central axis of the well 21 are identical. It is preferable that the radius of the cylindrical surface that is the inner peripheral surface of the cylindrical body 3 is equal to the radius of the cylindrical surface that is the inner peripheral surface of the body portion 21a.
- Each well 21 includes a cylindrical barrel portion 21a and a funnel-shaped bottom portion 21b provided at one end of the barrel portion 21a. At the bottom 21b, the culture space of the well 21 is reduced in diameter toward the tip of the well 21 (the side opposite to the opening). Of the inner surface of the well 21 facing the culture space, the center portion 21c at the bottom is a curved surface. That is, it can be said that the inner surface of the bottom portion 21b is an inverted conical surface having a curved top portion.
- the trunk portion 21a may be substantially cylindrical, for example. In one or a plurality of embodiments of each well 21, in a cross-sectional view (see FIG.
- the inner surface of the bottom 21b is substantially V-shaped, and its center
- the part 21c is arcuate.
- a connection portion between the body portion 21a and the bottom portion 21b among the inner surfaces is a curved surface.
- the inner surface of the well 21 is substantially the same as the central axis of the well 21 in the body portion 21a.
- the parallel and funnel-shaped bottom portion 21b includes a pair of inclined surfaces 21e inclined toward the central axis passing through the vertex 21d (deepest portion) of the inner surface of the well 21, and the arcuate surface 21f at the central portion 21c of the bottom portion 21b. including.
- the opening angle ⁇ of the bottom 21b is preferably more than 60 degrees and not more than 100 degrees, more preferably 70 to 100 degrees, and still more preferably, because the cell mass can be cultured efficiently. 80 to 90 degrees.
- the “opening angle” in the present disclosure refers to an angle formed by the pair of inclined surfaces 21e, for example, an angle indicated by ⁇ in FIG.
- the radius of curvature R 1 at the inner surface of the central portion of the bottom 21b is 0.5 because the cell mass is not exposed from the culture solution surface and the cell mass can be prevented from being stimulated when the culture solution is exchanged. From 2.0 to 2.0 mm is preferable, and from 1.0 to 2.0 mm is more preferable because the cell mass can be easily observed with an optical microscope.
- the “curvature radius of the inner surface of the central portion” in the present disclosure is a radius corresponding to a circumference including a curved surface having a curvature of 1 / R 1 at the tip of the bottom portion 21b of the well 21.
- the radius of curvature R 1 of the center inner surface can be measured by actual measurement of the cut section of a laser rangefinder, or molded article.
- the length H2 up to the deepest part 21d of the well 21 is that the cell mass before the addition of a new culture solution after the removal of a part of the culture solution for exchanging the culture solution is the culture solution. It is preferably 3.0 to 6.0 mm because it is not exposed from the surface and reduces damage and irritation to the cell mass due to removal of the culture solution, and a sufficient amount of nutrients and oxygen for the cell mass. From the reason of supplying 3.0, 5.0 to 5.0 mm is more preferable.
- the well 21 has a depth that allows a part of the culture solution to be removed for exchanging the culture solution. Then, the cell mass before the addition of a new culture solution is not exposed from the surface of the culture solution, and the damage and irritation that the cell mass undergoes with the removal of the culture solution is reduced. 0 mm is preferable, and 3.0 to 5.0 mm is more preferable because a sufficient amount of nutrients and oxygen are supplied to the cell mass.
- the diameter of the opening of the well 21 is preferably 4.0 mm or more, for example, because it is excellent in operability when using a multi-dispenser. From the point of increasing the number of wells 21 per culture vessel, 11.0 mm The following is preferred.
- the capacity per one inner space of the structure 12 composed of the well 21 and the cylindrical body 3, in other words, the capacity of the culture space of the well 21 (the inner space of the well 21) and the cylindrical body 3
- the total volume of the inner space of the inner peripheral surface is not particularly limited, but from the viewpoint that a sufficient amount of a culture solution or reagent can be added for culturing the cell mass, for example, 50 to 500 ⁇ L is preferable, and 50 to 200 ⁇ L is more preferable from the viewpoint of reducing the amount of the culture solution and reagent used.
- the form of the well of the culture container of this embodiment is not limited to what contains the above-mentioned trunk
- the shape of the well may be, for example, a shape in which the inner surface is hemispherical as long as a part of the culture solution in the well can be discharged without the cell clumps coming out of the well, and the body and the bottom.
- the bottom part may be hemispherical.
- the inner surface of the bottom 21b of the well 21 is subjected to a low cell adhesion treatment.
- the “cell low adhesion treatment” in the present disclosure refers to a treatment for reducing the adhesion of the inner surface of the well 21 to cells.
- the reduction in adhesiveness includes, for example, that it becomes difficult for the inner surface of the well 21 and the cell to adhere to each other, and that the inner surface of the well 21 and the cell do not adhere to each other.
- Examples of the cell low adhesion treatment include hydrophilic treatment of the inner surface of the well 21.
- Examples of the hydrophilization treatment include formation of a coating layer using a water-soluble resin and formation of a coating layer using a hydrophilic resin.
- the “water-soluble resin” in the present disclosure is one that is hydrated by an ionic bond or hydrogen bond with a water molecule and dissolved in water, and can be dissolved in 1.0 g or more in 100 g of water at 25 ° C. Say.
- Examples of the water-soluble resin include those having a necessary and sufficient amount of ionic or polar side chains with respect to the main chain in the molecule in order to dissolve in water.
- water-soluble resins examples include saponified polyvinyl acetate, polyvinyl pyrrolidone, polyethylene glycol, polyacrylamide, polymethacrylamide, polyhydroxyethyl methacrylate, polypentaerythritol triacrylate, polypentaerythritol tetraacrylate, polydiethylene glycol diacrylate. And a copolymer of monomers constituting them, a copolymer of 2-methacryloyloxyethyl phosphorylcholine and another monomer (such as butyl methacrylate), and the like.
- the structure which consists of 1 or more types chosen from the saponified material of polyvinyl acetate, polyvinylpyrrolidone, and polyethyleneglycol, and the functional group mentioned later is preferable.
- the stimulation with respect to various cells can be suppressed, and the growth rate of the cell mass and the quality of the grown cell mass can be improved.
- Examples of the saponified product of polyvinyl acetate include polyvinyl alcohol or a copolymer of vinyl alcohol and other compounds, hydrophilic group modification, hydrophobic group modification, anion modification, cation modification, amide group modification or acetoacetyl group. Examples thereof include a saponified product of a modified vinyl acetate modified with a reactive group and vinyl alcohol.
- the average degree of polymerization of the polymer is not particularly limited, but is preferably from 100 to 10,000, more preferably from 200 to 5,000, from the viewpoint that a uniform film is easily formed on the inner surface of the culture vessel and the workability is good. More preferred.
- the saponification degree of the saponified product of polyvinyl acetate is not particularly limited, but is preferably 20 to 100 mol%, more preferably 50 to 95 mol% of the whole polyvinyl acetate.
- the water-soluble resin is preferably a water-soluble resin having a functional group for curing in the side chain.
- the functional group for curing include radiation-reactive, photosensitive, and heat-reactive functional groups.
- the photosensitive functional group include a diazo group, an azide group, and a simmonyl group.
- thermally reactive and radiation reactive functional groups include vinyl groups and epoxy groups.
- a water-soluble resin having a photosensitive functional group is preferable from the viewpoint that curing treatment can be performed quickly and curing can be performed with simple equipment.
- the water-soluble resin As the water-soluble resin, a uniform coating layer can be formed by irradiation with light having a wavelength of 300 to 500 nm, and the cell adhesion amount can be reduced and the cell mass growth efficiency can be improved.
- it is a water-soluble resin represented by the following formula (Ia) or (Ib).
- R represents a trivalent hydrocarbon group having a carbonyl group and an —NH— group.
- the hydrocarbon group include a saturated hydrocarbon group and an unsaturated hydrocarbon group, and among them, a group represented by the following formula (II) is preferable from the viewpoint of easy synthesis of a polar side chain.
- R represents a divalent hydrocarbon group having a carbonyl group and an —NH— group.
- examples of the hydrocarbon group include a saturated hydrocarbon group and an unsaturated hydrocarbon group.
- r1 represents 1 to 1000
- r2 represents 40 to 4995
- r3 represents 0 to 4000
- n represents 1, 2, or 3.
- r1 represents 1 to 1000
- r2 represents 40 to 4995
- r3 represents 0 to 4000.
- the hydrophilic resin is not particularly limited, and examples thereof include poly-2-hydroxyethyl methacrylate (poly-HEMA), a phosphorylcholine group-containing polymer compound, and a polyethylene glycol chain-containing polymer compound.
- the thickness of the coating layer is not particularly limited, but the amount of protein taken into the coating layer is reduced to reduce the physical stimulation that the cell receives from the substrate (well), and the cell is mediated by proteins.
- 100 to 5,000 nm is preferable, and 150 to 1,000 nm is more preferable.
- the material of the culture vessel according to the present disclosure is not particularly limited, but a resin is preferable from the viewpoint that the culture vessel can be a disposable type and can be easily molded.
- the resin include polyolefin resins such as polypropylene resin, polyethylene resin, and ethylene-propylene copolymer or cyclic polyolefin resins, polystyrene resins such as polystyrene and acrylonitrile-butadiene-styrene resins, polycarbonate resins, and polyethylene terephthalate resins.
- Methacrylic resins such as polymethyl methacrylate resin, vinyl chloride resin, polybutylene terephthalate resin, polyarylate resin, polysulfone resin, polyethersulfone resin, polyetheretherketone resin, polyetherimide resin, polytetrafluoroethylene, etc.
- acrylic resins such as fluorine resins, polymethylpentene resins and polyacrylonitrile, and fibrous resins such as propionate resins.
- polystyrene resin is preferable from the viewpoints of moldability and sterility required for the culture container.
- the form of the culture container according to the present disclosure includes a multiwell plate including a plurality of wells.
- the number of wells in the multi-well plate is not particularly limited, and is, for example, 6, 12, 24, 48, 96, or 384.
- the culture container according to the present disclosure can be manufactured as follows.
- the culture container 1 of Embodiment 1 described with reference to FIGS. 1A to 4 includes a plate-like body 2, a plurality of wells 21 formed in the plate-like body 2, side walls 4, and a pedestal 5.
- the well plate body 11 and the plurality of cylindrical bodies 3 can be molded in the same mold by an injection molding method.
- cell low adhesion treatment is performed on the molded container.
- the cell low adhesion treatment can be performed, for example, by the method described in WO2013 / 183777.
- Sterilization includes, for example, ethylene oxide gas sterilization, dry heat sterilization, steam sterilization, radiation sterilization, etc., and radiation sterilization using ⁇ rays or electron beams is preferable. And ⁇ -ray sterilization is more preferable.
- the culture method of the present disclosure is obtained by incubating a cell mass in a well filled with a culture medium for a predetermined period, and then inclining the culture container according to the present disclosure. A part of the culture broth is allowed to pass through the communicating portion and discharged to the outside of the cylindrical body, and then removed from the culture vessel, and then a new culture broth (fresh culture broth) equal to or approximately equal to the removed culture broth is removed. ) Is added to the culture vessel, and the culture solution exchange step is repeated a predetermined number of times.
- the culture target of the culture method of the present disclosure is, for example, a cell mass of a human embryonic stem cell (human ES cell) or a human pluripotent stem cell (human iPS cell), for example, it is formed in a multiwell plate for cell mass formation
- the cultured cell mass may be transferred to the culture container of the present disclosure together with the total amount of the culture solution, and the culture method of the present disclosure may be applied to the cell mass.
- a cell mass that is, a cell mass to be cultured using the culture container of the present disclosure
- the diameter is preferably 500 ⁇ m to 1,000 ⁇ m because the nutrient container can be sufficiently supplied with nutrients in the culture container of the present disclosure.
- the cell mass is transferred to the culture container of the present disclosure so that one cell mass is arranged in one well.
- the “predetermined period” may be different depending on the type of cell, the volume of the well, the purpose of culture, etc., or may be different for each culture medium exchange step.
- the “predetermined period” in the culture medium exchange step at the beginning of culture may be longer than the “predetermined period” in the culture medium exchange step after the initial stage of culture.
- the number of repetitions of the culture medium exchange step is also appropriately determined according to the cell type, well volume, culture purpose, and the like.
- a part of the culture liquid in each well is allowed to pass through the communication portion to reduce the damage and irritation that the cell mass undergoes along with the removal of the culture liquid.
- the cell mass after a part of the culture solution has been removed and before the addition of a new culture solution is preferably maintained in a state where the entire cell mass is submerged in the culture solution.
- the amount of the culture medium to be removed from the culture vessel and the amount of the fresh culture medium to be added are determined so that the cell mass is not exposed from the culture liquid surface when the culture medium is replaced, and the fresh culture is performed. From the reason that a sufficient amount of nutrients and oxygen are supplied to the cell mass by adding the liquid, when the culture solution in the culture vessel immediately before the culture solution is removed is 100 parts by mass, 50 parts by mass or more and 99 parts by mass. Part or less, preferably 75 parts by weight or more and 99 parts by weight or less.
- the culture medium exchange step after adding the fresh culture medium to the culture container, it is preferable that the culture container is rocked so that the fresh culture medium is uniformly distributed in each well.
- the culture medium used in the culture medium exchange step may be a conventionally known culture medium depending on the cell type, well volume, culture purpose, and the like.
- the quality of the culture solution in the plurality of wells 21 is uniformed by diffusion using the communication part 3a unless the cell mass is lifted and comes out of the well 21.
- the culture solution is preferably supplied not only in the culture space in the well 21 but also in the space above the opening of the well 21 and surrounded by the side wall 4.
- the culture solution is preferably supplied so that a part of the culture solution overflows from the plurality of wells 21 and fills the proximal end of the lumen of the cylindrical body 3.
- the liquid level of the culture solution may be, for example, above one end closer to the well 21 of both ends of the slit 3a.
- the cell mass that has undergone the cell mass culture method using the culture vessel of the present disclosure may be transferred to another culture vessel and further cultured in the culture vessel.
- FIG. 5 is a plan view of the culture vessel 6 of the second embodiment. 6 is an enlarged sectional view taken along the line VI-VI ′ of FIG.
- FIG. 7 is an enlarged end view taken along the line VII-VII ′ of FIG.
- FIG. 8 is a plan view of a multiwell plate body 61 constituting the culture vessel 6 of Embodiment 2
- FIG. 11 is a bottom view of the liquid flow control body 800 shown in FIG. 10
- FIG. 13 is an enlarged cross-sectional view taken along the line XII-XII ′
- FIG. 13 is an enlarged side view of FIG. 10
- FIG. 14 is an enlarged perspective view of the liquid flow control body 800 shown in FIG.
- the culture container 6 of the second embodiment described with reference to FIGS. 5 to 14 is similar to the culture container 1 of the first embodiment, with a plurality of wells 71 formed in the plate-like body 7 and above each well 71. , A side wall 9 projecting above the openings of the plurality of wells 71 to surround the plurality of wells 71, and a pedestal 10 projecting below the openings of the plurality of wells 71.
- the cylindrical body 81 constitutes a liquid flow control body 800 including a connecting body 80 (see FIGS. 10 and 11) of a plurality of cylindrical bodies 81, and
- the communication part 81b is different from the culture container 1 of Embodiment 1 in that the communication part 81b is a slit along the circumferential direction of the cylindrical body 81.
- the culture vessel 6 of Embodiment 2 includes a multiwell plate main body 61 (see FIGS. 8 and 9) and a liquid flow control body 800 (see FIGS. 10, 11, and 14).
- the multi-well plate main body 61 includes a plurality of wells 71 formed in the plate-like body 7, a side wall 9 projecting upward from the openings of the plurality of wells 71 and surrounding the plurality of wells 71, and openings of the plurality of wells 71. And the base 10 protruding downward.
- the direction perpendicular to the plane of the plate-like body 7 is referred to as “vertical direction” (Z-axis direction), the cylindrical body 81 side is referred to as “upward”, and the well 71 side is referred to as “downward”.
- a central axis 81 a (see FIG. 7) of the cylindrical body 81 is parallel to the vertical direction and the Z-axis direction and coincides with the central axis of the well 71.
- the liquid flow control body 800 may not be joined to the multiwell plate body 61 but may be a separate body from the multiwell plate body 61. It may be integrated.
- At least one groove 84b is formed on the end surface (bottom surface) 84 on the well 71 side of each cylindrical body 81 constituting the liquid flow control body 800, and preferably in the circumferential direction.
- a plurality of grooves 84b are formed along the circumferential direction, and more preferably, the plurality of grooves 84b are formed at equal intervals along the circumferential direction.
- the groove 84 b does not allow the cell mass to pass outside the tubular body 81.
- a portion 84a of the end surface (bottom surface) 84 on the well 71 side of each tubular body 81 where the groove 84b is not formed is formed on each of the plate-like bodies 7 and constitutes the communication portion 81b that can discharge the culture medium.
- the groove 84b is formed in the cylindrical body 81 in a state where the liquid flow control body 800 is disposed on the one surface 7a of the plate-like body 7, and the slit 84b along the circumferential direction of the cylindrical body 81 is formed.
- a communication portion in the circumferential direction of the cylindrical body 81 that can discharge the culture solution in the well 71 to the outside of the cylindrical body 81.
- the slit along the circumferential direction of the cylindrical body 81 is not limited to this. The slit along the circumferential direction of the cylindrical body 81 is formed in the well 71 without causing the cell mass to come out of the well 71 when the culture vessel 1 is tilted to discharge a part of the culture solution.
- the cylindrical wall of the cylindrical body 81 is penetrated in the thickness direction, and the longitudinal direction is a through hole along the circumferential direction of the cylindrical body 81. Also good.
- the longitudinal direction of the slit may be parallel to the central axis 81a of the cylindrical body 81 (see FIG. 7).
- the depth of the groove 84b or the width W2 of the slit may be smaller than the diameter measured by microscopic observation of the cell mass immediately before being transferred to the culture container 6 of the second embodiment.
- the diameter is 600 to 700 ⁇ m, it is preferably 0.1 mm or more, more preferably 0.2 mm or more, further preferably 0.25 mm or more, from the viewpoint of improving the drainage efficiency of the culture solution, and the cell mass can flow out. From the viewpoint of reducing the property, 0.5 mm or less is preferable, 0.4 mm or less is more preferable, and 0.3 mm or less is more preferable.
- the circumferential length W3 (see FIG. 11) of the groove 84b or the slit is preferably 2 mm or more from the viewpoint of improving the discharge efficiency of the culture solution.
- the number of communication portions 81b is four, but the number of communication portions 81b is not particularly limited. However, two or more are preferable, and four or more are more preferable because it is easy to efficiently drain the culture medium from the well 71 and the above-mentioned fresh culture medium easily spreads uniformly in each well 71.
- the culture container 6 of Embodiment 2 includes two or more communication portions 81b, a pair of communication portions 81b selected from the two or more communication portions 81b is selected from the viewpoint of efficiently discharging the culture solution. It is preferable that the distance is 90 degrees or more in the circumferential direction.
- the shape of the inner surface of the well 71 is hemispherical, but in the culture container 6 of Embodiment 2, the form of the well 71 is the same. It is not limited, The same form as that of the culture container 1 of Embodiment 1 may be sufficient.
- the diameter at the opening of the well 71, the depth of the well 71, the capacity per inner space of the structure composed of the well 71 and the cylindrical body 81, the capacity per well 71, and the like are also described in the first embodiment. It may be the same as that of the culture vessel 1 in FIG.
- the liquid flow control body 800 includes a connecting body 80 in which a plurality of cylindrical bodies 81 are connected by a bridging portion 82 and a position restricting portion 83.
- the plurality of cylindrical bodies 81 are connected by a bridging portion 82 disposed between adjacent cylindrical bodies 81.
- each of the bridging portions 82 has an outer peripheral surface of the cylindrical body 81 such that a surface 82a facing the plate-like body 7 does not contact one surface 7a of the plate-like body 7. Since it is connected to the cylindrical body 81 at the center in the vertical direction, there is a gap C1 between the bridging portion 82 and one surface 7a of the plate-like body 7.
- the position restricting portions 83 are connected to the cylindrical bodies 81 ′ arranged on the outer edge of the connecting body 80 among the plurality of cylindrical bodies 81. .
- one end 83 a of the position restricting portion 83 is connected to the tubular body 81 at the vertical center of the outer peripheral surface of the tubular body 81, and the other end face of the position restricting portion 83.
- 83 b is in contact with the inner surface 9 a of the side wall 9. Therefore, for example, when the liquid flow control body 800 is separate from the multi-well plate body 61, the direction parallel to the X axis of the liquid flow control body 800 disposed on the one surface 7a of the plate-like body 7 And movement in a direction parallel to the Y-axis is prevented (see FIG. 5), and it is guaranteed that each cylindrical body 81 is always arranged at a predetermined position above the corresponding well 71, and liquid flow control is performed.
- the liquid flow control body 800 can be easily positioned at the time of joining.
- At least a portion 83 c close to the cylindrical body 81 of the surface facing the plate-like body 7 of the position restricting portion 83 is not in contact with one surface 7 a of the plate-like body 7. Since the cylindrical body 81 is connected to the cylindrical body 81 at the vertical center of the outer peripheral surface of the cylindrical body 81, a gap C ⁇ b> 2 exists between the position restricting portion 83 and the one surface 7 a of the plate-like body 7. Therefore, the culture solution discharged from the well 71 through the communication portion (slit) 81b by tilting the culture vessel 6 can be collected, for example, at the corner of the culture vessel through the gap C1 and the gap C2.
- the end portion (the other end portion) of the position restricting portion 83 away from the cylindrical body 81 is in contact with not only the inner surface 9a of the side wall 9 but also the one surface 7a of the plate-like body 7, the multiwell This is preferable because the positioning of the liquid flow control body 800 in the plate body 61 is easy.
- the position restricting portion 83 is provided on all of the cylindrical bodies 81 ′ arranged on the outer edge of the connecting body 80 among the plurality of cylindrical bodies 81. Are connected.
- the liquid flow control body 800 includes at least one pair of position restricting portions 83 whose one end is connected to the connecting body 80 and whose other end is in contact with the inner surface of the side wall 9.
- One position restricting portion 83 may be in contact with one side, and the other position restricting portion 83 may be in contact with the other inner surface 9a of the side wall 9 facing each other.
- the liquid flow control body 800 when the liquid flow control body 800 is joined to the multi-well plate body 61, the positioning of the liquid flow control body 800 on the one surface 7a of the plate-like body 7 at the time of joining is facilitated. It can be carried out. Further, when the liquid flow control body 800 is separate from the multiwell plate body 61, the movement of the liquid flow control body 800 on the one surface 7a of the plate-like body 7 can be suppressed.
- the liquid flow control body 800 includes two pairs of the position restricting portions 83, and, as shown in FIG.
- One of the position restricting portions 83 ′ contacts, and the other position restricting portion 83 ′ contacts the other inner surface of the side walls 9 facing each other in the Y-axis direction, and the side walls 9 facing each other in the X-axis direction.
- One position restricting portion 83 ′′ of the other pair of position restricting portions 83 ′′ abuts on one side of the inner surface of the side wall 9 and the other position on the other inner surface of the side wall 9 facing each other in the X-axis direction. It is preferable that the restricting portion 83 ′′ is in contact.
- the material of the culture vessel 6 of Embodiment 2 may be the same as that of the culture vessel 1 of Embodiment 1.
- the multi-well plate body 61 and the liquid flow control body 800 are separately molded, for example, they are joined or the liquid flow control body 800 is placed in the multi-well plate body 6. It can be manufactured by arranging.
- the culture vessel 6 of Embodiment 2 is used in the above [Culture method of cell mass], the influence on the cell mass is small and the culture solution can be exchanged efficiently, so that the cell mass can be cultured efficiently.
- FIG. 15A is a plan view of the cell mass culture vessel 100 of Embodiment 3, and FIG. 15B is a partially enlarged view of FIG. 15A.
- 16 is an enlarged cross-sectional view taken along the line XVI-XVI ′ of FIG. 15A.
- 17A is an enlarged cross-sectional view taken along line XVII-XVII ′ in FIG. 15A, and
- FIG. 17B is a partially enlarged view of FIG. 17A.
- 18 is a partially enlarged view of FIG. 16
- FIG. 19 is a perspective cross-sectional view illustrating the internal structure of the structure 12 including the tubular body 3 and the well 21 of the cell mass culture vessel 100.
- FIG. 20 is a partially enlarged view of FIG. 15A.
- FIG. 21 shows a culture solution in the well 21 after the cell mass 14 has been cultured in the culture solution 13 for a predetermined time using the cell mass culture container 100 of the present disclosure.
- 13 is a conceptual diagram illustrating a state after a part of 13 is discharged out of the structure 12 through the communication part 3a.
- the culture container 100 of Embodiment 3 described with reference to FIGS. 15A to 21 is a container for culturing a cell mass, and includes the above-described Embodiment 1 and Embodiment, except that it includes a liquid guiding section described later. 2 has the same configuration as the cell mass culture vessel.
- the culture vessel 100 includes a plurality of wells 21 formed in the plate-like body 2 and a cylindrical body 3 disposed above each well 21.
- the direction perpendicular to the plane of the plate-like body 2 is referred to as “vertical direction”
- the cylindrical body 3 side is referred to as “upward”
- the well 21 side is referred to as “downward”.
- the culture vessel 100 of Embodiment 3 includes a side wall 4 that protrudes upward from the openings of the plurality of wells 21 and surrounds the plurality of wells 21, and a pedestal 5 that protrudes downward from the openings of the plurality of wells 21.
- the shape of the outer surface and the inner surface of the side wall 4 that can be seen when the culture vessel 100 is viewed in plan is substantially rectangular. Since the pedestal 5 protrudes farther from the plate-like body 2 than the well 21, the end surface of the pedestal 5 is in contact with the horizontal plane when the culture vessel 1 is placed on the horizontal plane.
- Each well 21 has a culture space that can accommodate a cell mass and a culture solution.
- the shape of the cylindrical body 3 is substantially cylindrical, and has a lumen communicating with the culture space.
- a plurality of communication portions 3 a are formed on the cylindrical wall 3 b of the cylindrical body 3 at regular intervals along the circumferential direction of the cylindrical body 3, for example.
- the communication part 3a is a slit formed from the base end 3d of the cylindrical body 3 to the front end 3e in parallel with the central axis 3c (see FIG. 18) of the cylindrical body 3.
- the central axis 3c of the cylindrical body 3 is parallel to the up-down direction, and the well 21 and the structural body 12 including the cylindrical body 3 and the well 21 (FIGS. 17A, 17B, 18, and 19). , Refer to the central axis of FIG.
- one end of the slit 3a in the longitudinal direction closer to the well 21 (lower end 311; see FIGS. 18 to 19).
- the culture vessel 100 is tilted to discharge a part of the culture solution, the cell mass does not come out of the well 21 and a part of the culture solution in the well 21 is discharged well.
- the slits are formed as long as the fresh culture fluid supplied to the outside of the structure 12 can flow into the well 21 well. It is not limited to an example.
- the slit may be formed from above the base end 3 d of the cylindrical body 3 toward the distal end 3 e of the cylindrical body 3.
- the number of communication portions 3a is eight, but the number of communication portions 3a is not particularly limited. However, two or more are preferable, and four or more are more preferable, because the drainage of the culture solution from each well 21 is improved and the fresh culture solution described later easily spreads uniformly in each well. More than the number is more preferable.
- the pair of communication portions 3a selected from the two or more communication portions 3a is provided in the circumferential direction because the culture medium is efficiently discharged.
- the distance is preferably 90 degrees or more, and more preferably 180 degrees or more.
- the slit width W1 (circumferential width) should be smaller than the diameter measured by microscopic observation of the cell mass immediately before being transferred to the culture vessel.
- the diameter of the cell mass is 600 to 700 ⁇ m, it is preferably 0.1 mm or more, more preferably 0.2 mm or more, from the viewpoint of improving the drainability of the culture medium and the inflow of fresh culture medium. From the viewpoint of reducing the possibility of cell mass outflow, 0.5 mm or less is preferable, 0.4 mm or less is more preferable, and 0.3 mm or less is still more preferable.
- the liquid level of the culture solution is based on the base of the cylindrical body 3 from the viewpoint of uniformizing the quality of the culture solution in the plurality of wells 21 by diffusion using the communication part 3a. It is preferable to be higher than the end 3d (the lower end 311 of the communication portion 3a).
- the cell mass floats in the culture solution, passes over the tip of the cylindrical body 3 and between the cylindrical bodies 3 adjacent to the cylindrical body 3 or in the adjacent cylindrical body 3 and the well 21.
- the height H1 (see FIG. 18) of the cylindrical body 3 is preferably 1 to 7 mm, and more preferably 3 to 5 mm so that it does not move inward.
- the openings of the plurality of wells 21 are in the same plane as the one surface 2a (see FIGS. 16 to 18) of the plate-like body 2 connecting the plurality of wells 21. 3 is arranged on the surface 2a, but the slit which is the communication portion 3a is formed from the base end 3d of the cylindrical body 3 (see FIGS. 18 and 19) from the viewpoint of improving the dischargeability of the culture medium. Preferably it is formed.
- the structure 12 (FIG. 17A, FIG. 17) 17B and FIG. 18), it is preferable that there is no step on the inner surface (except for the portion where the liquid guiding portion 60 described later is formed).
- the center axis 3c of the cylindrical body 3 and the well 21 It is preferable that the central axis is coincident and the radius of the cylindrical surface which is the inner peripheral surface of the cylindrical body 3 is equal to the radius of the opening of the well 21.
- the well 21 includes a cylindrical body 21a (see FIG.
- the inner surface of the body 21a is a cylindrical surface, the central axis 3c of the cylindrical body 3 and the central axis of the well 21 are identical. It is preferable that the radius of the cylindrical surface that is the inner peripheral surface of the cylindrical body 3 is equal to the radius of the cylindrical surface that is the inner peripheral surface of the body portion 21a.
- each well 21 includes a cylindrical barrel portion 21a and a funnel-shaped bottom portion 21b provided at one end of the barrel portion 21a.
- the culture space of the well 21 is reduced in diameter toward the tip of the well 21 (the side opposite to the opening).
- the central portion 21c of the bottom portion 21b is a concave curved surface. That is, it can be said that the inner surface of the bottom portion 21b is an inverted conical surface having a curved top portion.
- the trunk portion 21a may be substantially cylindrical, for example.
- the inner surface of the bottom 21b is substantially V-shaped, and its center
- the part 21c is arcuate.
- a connection portion between the body portion 21a and the bottom portion 21b among the inner surfaces is a curved surface.
- the inner surface of the well 21 is substantially the same as the central axis of the well 21 in the body portion 21a.
- the parallel and funnel-shaped bottom portion 21b includes a pair of inclined surfaces 21e inclined from the lower end of the inner surface of the body portion 21a toward the central axis passing through the vertex 21d (deepest portion) of the inner surface of the well 21,
- the central portion 21c of 21b includes an arcuate surface 21f.
- the opening angle ⁇ of the bottom portion 21b is preferably 60 degrees or more and 100 degrees or less, and preferably 70 to 100 degrees, because the cell mass can be cultured efficiently. Is more preferably 80 to 90 degrees.
- the “open angle” in the present disclosure refers to an angle formed by the pair of inclined surfaces 21e, for example, an angle indicated by ⁇ in FIG.
- the radius of curvature R 1 at the inner surface of the central portion of the bottom portion 21b prevents the cell mass from being exposed from the culture fluid surface and the stimulation to the cell mass when the culture fluid is replaced.
- 0.5 to 2.0 mm is preferable for the reason that it can be performed, and 1.0 to 2.0 mm is more preferable for the reason that the cell mass can be easily observed with an optical microscope.
- the “curvature radius of the inner surface of the central portion” in the present disclosure is a radius corresponding to a circumference including a curved surface having a curvature of 1 / R 1 at the tip of the bottom portion 21b of the well 21.
- the radius of curvature R 1 of the center inner surface can be measured by actual measurement of the cut section of a laser rangefinder, or molded article.
- both ends in the longitudinal direction of the slit 3a A length H2 (see FIG. 18) from one end (the lower end 311) closer to the well 21 to the deepest part 21d of the well 21 is partly removed from the culture solution for exchanging the culture solution. Thereafter, the cell mass before the addition of the fresh culture solution is not exposed from the surface of the culture solution, and the damage and irritation that the cell mass undergoes as the culture solution is removed is reduced to 3.0 to 6.0 mm. Further, 3.0 to 5.0 mm is more preferable because a sufficient amount of nutrients and oxygen are supplied to the cell mass.
- the well 21 has a depth that allows a part of the culture solution to be removed for exchanging the culture solution. After that, the cell mass before the addition of the fresh culture solution is not exposed from the surface of the culture solution, and the damage and irritation that the cell mass undergoes with the removal of the culture solution is reduced. 0 mm is preferable, and 3.0 to 5.0 mm is more preferable because a sufficient amount of nutrients and oxygen are supplied to the cell mass.
- the diameter of the opening of the well 21 is preferably 4.0 mm or more, for example, because it is excellent in operability when using a multi-dispenser, and the number of wells 21 per culture vessel From the point which increases, 11.0 mm or less is preferable.
- the capacity per one inner space of the structure 12 composed of the well 21 and the cylindrical body 3, in other words, the culture space of the well 21 (the inner space of the well 21).
- the volume of the space inside the cylindrical body 3 from the inner peripheral surface is not particularly limited, but a sufficient amount of culture solution or reagent for culturing the cell mass
- 50 to 500 ⁇ L is preferable, and 50 to 200 ⁇ L is more preferable from the viewpoint of saving the amount of the culture solution and reagent used.
- the form of the well of a culture container is not limited to what contains the above-mentioned trunk
- the shape of the well may be, for example, a shape in which the inner surface is hemispherical as long as a part of the culture solution in the well can be discharged without the cell clumps coming out of the well, and the body and the bottom.
- the bottom part may be hemispherical.
- the culture vessel 100 includes a liquid guiding part 60 formed on the inner surface of the structure 12 including the cylindrical body 3 and the well 21.
- the liquid guiding part 60 includes a liquid guiding auxiliary groove 620 formed by forming a pair of protrusions 610 on the inner surface of the structure 12.
- the liquid guiding auxiliary groove 620 forms a pair of projecting portions 610 on the inner surface of the structure 12 such that the upper end surface 611 of each projecting portion 61 is disposed above the lower end 311 of the slit 3a.
- protrusions 610 on both sides in the width direction of at least one slit 3a of the inner surface of the structure 12 composed of the body 3 and the well 21 along the longitudinal direction of the slit 3a. ing.
- the slit 3a is formed from the proximal end 3d of the cylindrical body 3
- the upper end 610a of each protrusion 610 and the lower end 31b of the slit 3a are arranged at the same position in the vertical direction.
- the culture vessel 100 by providing the liquid guiding auxiliary groove 620, the flowability of the fresh culture solution from the slit 3a into the well 21 and the discharge of the culture solution in the well 21 to the outside of the structure 12 are caused by capillary action.
- the lower end 610b of each protrusion 610 reaches the bottom of the inner surface of the well 21 (the inner surface of the bottom 21b of the well 21).
- One end 620 a of the liquid guiding auxiliary groove 620 formed between the pair of protrusions 610 is a closed end, and is defined by the inner surface of the bottom 21 b of the well 21.
- the inner surface of the bottom 21b of the well 21 that defines the end 620a is an inclined surface 21e inclined downward from the upstream side to the downstream side of the flow of the culture solution that can flow into the culture space of the well 21 from the slit 3a (FIG. 18). Part).
- the liquid guiding auxiliary groove 620 facilitates the discharge of the culture medium to the outside of the structure 12 and the inflow into the structure 12 through the slit 3a.
- the vertical length W4 (see FIG. 16) from the upper end surface 611 of each protrusion 610 to the lower end 311 of the slit 3a is within the well 21 of the fresh culture solution from the slit 3a. From the reason that the inflow property to the water tends to be improved, it is preferably 0.1 mm or more, and more preferably 0.3 mm or more. In one or some embodiment, there is no restriction
- the slit 3a is formed from the base end 3d of the cylindrical body 3, and when the slit 3a is formed from above the base end 3d of the cylindrical body 3, W4 Is shorter than the length in the vertical direction of the portion of the protrusion 610 formed on the inner surface of the cylindrical body 3.
- the upper end surface 611 of the protruding portion 610 is a plane parallel to a plane orthogonal to the central axis 3c of the cylindrical body 3 (see FIG. 18). Since the lower end of the slit 3a is also defined by a plane parallel to the plane orthogonal to the central axis 3c (see FIG. 18) of the cylindrical body 3, the length W4 is along the circumferential direction of the cylindrical body. It is constant.
- the length W4 when the length W4 is not constant along the circumferential direction of the cylindrical body because the upper end surface 611 of the protruding portion 610 is a curved surface, the length W4 extends from the upper end surface 611 of each protruding portion 610 to the slit 3a.
- the distance W5 (see FIG. 17B) between the protrusions 610 on the circumference passing through the lower end 311 of the slit 3a is such that the fresh culture broth from the slit 3a flows into the well 21 and Preferably, the discharge rate of the culture solution in the well 21 to the outside of the structure 12 is improved, and the cell mass can be prevented from being sandwiched between the pair of projecting portions 610. More preferably, it is 0.4 mm or more, preferably 1.0 mm or less, and more preferably 0.7 mm or less.
- the circumference passing through the lower end 311 of the slit 3a is a point on the central axis 3c (see FIG.
- the circumference centered on the upper point. W5 can be said to be the distance between the protrusions 610 at the same position as the lower end 311 of the slit 3a on the inner surface of the cylindrical body 3.
- each protrusion 610 that faces the culture space is a convex curved surface that protrudes toward the extension axis of the center axis 3c of the cylindrical body 3 (the center axis of the well 21).
- the convex curved surface is a curved surface in which a portion far from the inner surface 21e of the well 21 (the inner surface of the body portion 21a) is higher than a portion close thereto.
- the cylindrical body 3 is, for example, an arcuate shape (circular with a single string) surrounded by an arc and a straight line. It is a form that can be made when divided into two). Or it is a shape prescribed
- the surface 610c facing the culture space of each protrusion 610 is the convex curved surface, physical stimulation that the cell mass receives from each protrusion 610 can be reduced.
- the flowability of fresh culture fluid from the slit 3a into the well 21 and the drainage of the culture fluid in the well 21 to the outside of the structure 12 are easily improved, and the cell mass is a pair of cells.
- the cross section of the protrusion is a shape defined by an arcuate shape or an overlapping portion of two circles, and a shape defined by an arcuate shape or an overlapping portion of two circles
- the curvature radius R 2 (see FIG. 20) of the circumference including the arc protruding toward the central axis of the cylindrical body is 0.5 mm or more and 1.0 mm or less.
- the flowability of fresh culture fluid from the slit 3a into the well 21 and the drainage of the culture fluid in the well 21 to the outside of the structure 12 are easily improved, and the cell mass is a pair of cells.
- the culture vessel 100 in plan view, the center of the circle the radius of curvature R 2 and radius, the width of the slit 3a It is preferable that it is on the tangent of the circumference including the inner surface of the cylindrical body 3 through the center of the direction.
- At least the inner surface of the bottom 21b (see FIG. 18) of the well 21 is preferably subjected to a low cell adhesion treatment.
- the number of the pair of protrusions 610 and the liquid guiding auxiliary grooves 620 is two for each structure 12, but the culture container 100 of the present disclosure is not limited thereto.
- the number of the pair of protrusions 610 and the liquid guide auxiliary grooves 620 is not limited to this.
- the number of the pair of protrusions 610 and the liquid guiding auxiliary grooves 620 is one or more in consideration of the amount of culture medium discharged in the well 21 and the amount of culture medium flowing into the well 21 according to the capacity of the well 21. What is necessary is just to provide.
- a communication portion 3a that can discharge the culture solution in the well 21 to the outside of the cylindrical body 3 is formed on the cylindrical wall 3b of the cylindrical body 3, and the central axis 3c of the cylindrical body 3 (see FIG. 18).
- the communication part 3a is not limited to this, and for example, it penetrates the cylindrical wall 3b of the cylindrical body 3 in its thickness direction, and its longitudinal direction is along the circumferential direction of the cylindrical body 3 It may be a slit.
- the communication part 3a is not limited to a slit, For example, the through-hole which penetrates the cylinder wall 3b of the cylindrical body 3 in the thickness direction may be sufficient.
- the shape of the inner surface of the well 21 is a shape including the trunk portion 21a and the bottom portion 21b.
- the shape of the well 21 is not limited to this and is hemispherical. There may be.
- the culture container 100 of the third embodiment described with reference to FIGS. 15A to 21 can be manufactured by the same method as the culture container 1 of the first embodiment.
- the multi-well plate main body 110 (see FIG. 17A) including the plate-like body 2, the plurality of wells 21 formed in the plate-like body 2, the protrusions 610, the side walls 4, and the pedestal 5 is formed by injection molding. It can be molded in the same mold by the law.
- the cell mass culture vessel of the present embodiment may be composed of a multiwell plate main body and a liquid flow control body, similarly to the cell mass culture container of the second embodiment.
- the cell mass culture container is formed by separately molding the multiwell plate main body and the liquid flow control body, respectively, and then, for example, by joining them.
- it can be manufactured by arranging a liquid flow control body in the multi-well plate body.
- the culture vessel 100 of the third embodiment is used in the above-mentioned [Method of culturing cell mass], the influence on the cell mass is small and the culture solution can be exchanged efficiently, so that the cell mass can be cultured efficiently. Can do.
- FIG. 22A is a plan view of the culture vessel 200 of Embodiment 4, and FIG. 22B is a partially enlarged view of FIG. 22A.
- FIG. 23 is an enlarged cross-sectional view taken along the line XXIII-XXIII ′ of FIG. 22A.
- 24A is an enlarged cross-sectional view taken along the line XXIV-XXIV ′ of FIG. 22A, and
- FIG. 24B is a partially enlarged view of FIG. 24A.
- FIG. 25 is a partially enlarged view of FIG. 23, and FIG. 26 is a perspective cross-sectional view for explaining the internal structure of the structure 12 including the tubular body 3 and the well 21 of the cell mass culture vessel 200.
- FIG. 27 is a concept for explaining a state after the cell mass 14 is cultured in the culture solution 13 for a predetermined time using the cell mass culture container 200 of the present disclosure and then a part of the culture solution in the well 21 is discharged.
- FIG. 27 is a concept for explaining
- the culture container 200 of the fourth embodiment described with reference to FIGS. 22A to 27 has the same configuration as that of the culture container 100 of the third embodiment except that the form of the liquid guiding part is different.
- the culture container 200 of the fourth embodiment includes a plurality of wells 21 formed in the plate-like body 2, a cylindrical body 3 disposed above each well 21, and a plurality of wells 21.
- the side wall 4 that protrudes upward from the opening of the well 21 and surrounds the plurality of wells 21, the pedestal 5 that protrudes downward from the opening of the plurality of wells 21, and the structure 12 including the cylindrical body 3 and the well 21.
- induction part 70 formed in the inner surface of this is included.
- the liquid guiding part 70 includes a liquid guiding auxiliary groove 720 formed by forming a pair of protrusions 710 on the inner surface of the structure 12.
- the liquid guiding auxiliary groove 720 forms a pair of projecting portions 710 on the inner surface of the structure 12 such that the upper end surface 711 of each projecting portion 710 is disposed above the lower end 311 of the slit 3a.
- the slit 3a is formed from the base end 3d of the cylindrical body 3
- the upper end 710a of each protrusion 710 and the lower end 31b of the slit 3a are arranged at the same position in the vertical direction. .
- the lower end portions 710b (see FIG. 26) of the pair of projecting portions 710 do not reach the bottom surface of the inner surface of the well 21, and the liquid guiding portion 70 is provided with each projecting portion.
- a base 730 that connects the lower ends 710b of the part 710 to each other is included. Since the base 730 is disposed between the bottom surface of the well 21 and the pair of protrusions 710 so as to connect the lower end portions 710b of the protrusions 710 to each other, the base 730 is one of the liquid introduction auxiliary grooves 720.
- the surface 730a that defines the end (closed end) of the substrate is provided.
- the lower ends 710 b of the pair of protrusions 710 do not reach the bottom surface of the inner surface of the well 21, so the lower ends 710 b of the pair of protrusions 710 are not included in the inner surface of the well 21. Excessive discharge of the culture solution in the well 21 to the outside of the structure 12 is suppressed as compared to the culture container 100 of the third embodiment that has reached the bottom surface. Therefore, in the culture vessel 200, it is easy to control the discharge amount of the culture solution, and it is possible to prevent the cell mass from being exposed from the culture solution due to the excessive discharge of the culture solution and being damaged.
- the surface 730a defining one end (closed end) of the liquid introduction auxiliary groove 720 is downstream from the upstream side of the flow of the culture solution that can flow into the culture space from the slit 3a because the inflow of the culture solution is promoted. It is preferable that the inclined surface 730c be inclined downward toward the side (inclined upward from the downstream side toward the upstream side). As can be clearly understood from FIG. 25, the inclined surface 730 c is inclined downward from the inner surface (cylindrical surface) of the body portion 21 a of the well 21 toward the central axis of the well 21.
- the surface 730 a that defines one end (closed end) of the liquid introduction auxiliary groove 720 may be a surface parallel to a plane orthogonal to the central axis of the well 21, for example.
- it is preferably 0 ° or more, more preferably 30 ° or more, and for the reason of suppressing excessive discharge of the culture solution, it is preferably 75 ° or less, more preferably 60 ° or less.
- the communication portion 3a that can discharge the culture solution in the well 21 to the outside of the cylindrical body 3 is provided with the cylindrical wall 3b of the cylindrical body 3.
- the communication portion 3a is not limited to the slit, and is, for example, a through hole that penetrates the cylindrical wall of the cylindrical body in the thickness direction. May be.
- the distance W5 between the portions 710 and the cross-sectional shape obtained by cutting the protruding portion 710 along a direction plane orthogonal to the central axis 3c of the cylindrical body 3 may be the same as the culture vessel 100 of the third embodiment.
- the cell mass culture vessel of the present embodiment may be composed of a multiwell plate main body and a liquid flow control body, similarly to the cell mass culture container of the second embodiment.
- the cell mass culture container is formed by separately molding the multiwell plate main body and the liquid flow control body, respectively, and then, for example, by joining them.
- it can be manufactured by arranging a liquid flow control body in the multi-well plate body.
- the culture vessel 200 of the fourth embodiment is used in the above-mentioned [Method of culturing cell mass], the influence on the cell mass is small and the culture solution can be exchanged efficiently, so that the cell mass can be cultured efficiently. Can do.
- Example 1 [Production of cell culture vessel]
- a 24-well multiwell plate (horizontal: 65.0 mm, vertical: 50.0 mm, height: 20.5 mm) was molded by injection molding using polystyrene resin (manufactured by PS Japan, trade name: HF77).
- the shape of the culture vessel in this example is the shape shown in FIGS. 1A to 3, the shape of the well is the shape shown in FIG. 4, the opening angle of the bottom ( ⁇ in FIG. 4) is 85 degrees, and the inner surface at the center of the bottom is the radius of curvature R 1 was 2.0 mm.
- the diameter of each well opening was 6.2 mm, the depth was 5.0 mm, and the body depth was 2.6 mm.
- Each cylindrical body has an inner diameter of 6.2 mm, a height of 5.0 mm, a side wall thickness of 0.8 mm, and the capacity per one of the inner space of the structure composed of the well and the cylindrical body is About 250 ⁇ L.
- the tubular body was provided with a total of eight communicating portions having a slit width W1 of 0.3 mm every about 45 degrees.
- the obtained 24-well multiwell plate with a cylindrical body was subjected to plasma treatment (oxygen plasma 10 minutes) using a plasma treatment apparatus (SERIES7000 manufactured by BRANSON / IPC). This imparted wettability to the plate surface as a pretreatment.
- R is a group represented by the following formula (II)): a compound represented by the following formula (Ia) (average polymerization degree of water-soluble resin) 1600, introduction ratio of photosensitive group 0.65 mol%)) was dissolved in a 25% by volume ethanol aqueous solution in a light-shielded polypropylene container colored with a brown pigment to prepare a 0.5% by weight water-soluble resin solution.
- the 0.5 wt% water-soluble resin solution was added to the plasma-treated plate at 50 ⁇ L per well and allowed to stand for 1 minute, then the plate was turned over and the excess solution was discarded. Next, after primary drying at 40 ° C. for 60 minutes, the water-soluble resin was cured by irradiating UV light of 250 nm with a UV lamp at 1.0 mW / cm 2 ⁇ 30 seconds. Next, the plate was repeatedly washed with ultrapure water three times, dried, and then irradiated with ⁇ rays at an absorbed dose of 10 kGy (a device manufactured by Raje Industries Co., Ltd.) to obtain a culture container of Example 1.
- a cell suspension was prepared by dispersing HepG2 in a culture solution (Dulbecco's modified MEM + 10 vol% fetal bovine serum) at a concentration of 3 ⁇ 10 4 cells / mL, and PrimeSurface® 96V plate (Sumitomo Bakelite, MS-9096V). ) was dispensed at 100 ⁇ L / well and cultured in a carbon dioxide culture vessel with 5% carbon dioxide gas, 99% humidity, and a temperature of 37 ° C. After 6 days, it was confirmed under a microscope that one cell mass (spheroid) having a diameter of about 700 ⁇ m was formed in each well.
- a culture solution Dulbecco's modified MEM + 10 vol% fetal bovine serum
- Example 1 the culture vessel of Example 1 is tilted in various directions, a part of the culture solution in each well is collected at the corner of the culture vessel, and the culture solution is aspirated with an aspiration pipette after about 3 mL.
- About 3 mL of a new culture solution (fresh culture solution) was placed in the culture container of Example 1.
- the culture medium was exchanged by the same operation every 3 days. However, care was taken not to dry the cell mass when exchanging the culture solution.
- the culture medium was exchanged five times, the cell mass in each well was observed with a microscope. The cell mass in each well was growing smoothly, and the diameter of the cell mass averaged 1100 ⁇ m. .
- Example 1 According to [Formation of cell mass (spheroid) using HepG2 (human liver cancer-derived cell)] in Example 1, 96 cell masses (spheroids) having a diameter of about 700 ⁇ m were formed. Subsequently, the cell mass in each well was collected together with the culture medium in the same manner as in Example 1, and 24 cell masses per plate were transferred to 4 PrimaSurface 60 mm dishes (MS-9060X, manufactured by Sumitomo Bakelite Co., Ltd.). . After all the cell masses (spheroids) in 96 wells were transferred to the petri dish, a new culture solution was added to 1.84 mL per petri dish to make the volume of the culture solution in the petri dish 4 mL.
- the culture medium was replaced 3 days later.
- the petri dish was tilted and the cell mass was collected at the corner of the petri dish. Then, 3 mL of the supernatant of the culture solution was aspirated, and then 3 mL of a new culture solution was added to the petri dish.
- the petri dish was shaken to disperse the cell mass in the culture solution. Thereafter, the culture medium was exchanged by the same operation every 3 days. As a result of performing the culture medium exchange operation five times for the four petri dishes, nine cell masses were lost by suction with a pipette while the culture medium exchange operation was performed five times. Of the remaining cell masses, 28 Fusion occurred for one cell mass, and 59 cell masses could be cultured as one independent cell mass.
- the culture container of Example 1 has little influence on the cell mass, can efficiently exchange the culture solution, and can successfully grow all 96 cell masses. Became clear. On the other hand, in the culture container of Comparative Example 1, all the 96 cell clusters could not be grown smoothly due to erroneous suction of the cell clusters or fusion of the cell clusters.
- Example 2 [Production of cell culture vessel]
- a 24-well multiwell plate (horizontal: 65.0 mm, vertical: 50.0 mm, height: 20.5 mm) was molded by injection molding using polystyrene resin (manufactured by PS Japan, trade name: HF77).
- the culture vessel in this example has the shape shown in FIGS. 22A to 27, the well has the shape shown in FIG. 25, the bottom opening angle ( ⁇ in FIG. 25) is 85 degrees, and the inner surface at the center of the bottom.
- the radius of curvature R 1 was 2.0 mm.
- the diameter of each well opening was 6.2 mm, the depth was 5.0 mm, and the body depth was 2.6 mm.
- Each cylindrical body has an inner diameter of 6.2 mm, a height of 5.0 mm, a side wall thickness of 0.8 mm, and a capacity per inner space of a structure composed of a well and a cylindrical body of about 250 ⁇ L.
- the volume of the lower part than the lower end of the slit in the structure, that is, the volume per well was about 105 ⁇ L.
- the cylindrical body was provided with a total of eight slits having a width W1 (see FIG. 22B) of 0.3 mm as communication portions at intervals of about 45 degrees.
- W4 see FIG. 23
- W5 see FIG.
- the inclination angle ⁇ (see FIG. 25) of the surface defining one end (closed end) of the liquid introduction auxiliary groove is 45 degrees, and the vertical length H3 (see FIG. 25) of the liquid introduction auxiliary groove in the well is 1. 0.5 mm.
- the shape of the cut surface obtained by cutting the projecting portion in a direction plane orthogonal to the central axis of the cylindrical body is substantially an arcuate shape (a shape defined by the overlapping portion of the two circles).
- the curve protruding in the direction of the central axis is on the tangent line of the circumference including the inner surface of the cylindrical body passing through the center in the width direction of the slit, and the radius of curvature R 2 (see FIG. 20) is 0.7 mm. It was a part.
- the obtained 24-well multiwell plate with a cylindrical body was subjected to plasma treatment (oxygen plasma 10 minutes) using a plasma treatment apparatus (SERIES7000 manufactured by BRANSON / IPC). This imparted wettability to the plate surface as a pretreatment.
- Example 3 A culture vessel of Example 3 was produced in the same manner as Example 2 except that the inclination angle ⁇ was set to 0 degree.
- Example 4 A culture vessel of Example 4 was produced in the same manner as Example 2 except that H3 was 1.0 mm.
- Example 5 A culture vessel of Example 5 was produced in the same manner as Example 2 except that the inclination angle ⁇ was 0 degree and H3 was 0.5 mm.
- Example 6 A 24-well multiwell plate (horizontal: 65.0 mm, vertical: 50.0 mm, height: 20.5 mm) was molded by injection molding using polystyrene resin (manufactured by PS Japan, trade name: HF77).
- the shape of the culture vessel in this example is the shape shown in FIGS. 15A to 21, the shape of the well is the shape shown in FIG. 18, the opening angle of the bottom ( ⁇ in FIG. 18) is 85 degrees, the radius of curvature R 1 was 2.0 mm.
- the diameter of each well opening was 6.2 mm, the depth was 5.0 mm, and the body depth was 2.6 mm.
- Each cylindrical body has an inner diameter of 6.2 mm, a height of 5.0 mm, a side wall thickness of 0.8 mm, and the capacity per one of the inner space of the structure composed of the well and the cylindrical body is , About 250 ⁇ L, and the volume of the lower part of the structure below the lower end of the slit, that is, the volume per well was about 105 ⁇ L.
- the cylindrical body was provided with a total of eight slits having a width W1 (see FIG. 22B) of 0.3 mm as communication portions at intervals of about 45 degrees. Further, two pairs of projecting portions were provided as a liquid guiding portion in a structure including a well and a cylindrical body. W4 (see FIG.
- the length H3 in the vertical direction of the liquid introduction auxiliary groove in the well was 3.52 mm.
- the shape of the cut surface obtained by cutting the projecting portion in a direction plane orthogonal to the central axis of the cylindrical body is substantially an arcuate shape (a shape defined by the overlapping portion of the two circles).
- the curve protruding in the direction of the central axis is on the tangent line of the circumference including the inner surface of the cylindrical body passing through the center in the width direction of the slit, and the radius of curvature R 2 (see FIG. 20) is 0.7 mm. It was a part.
- surface treatment using a water-soluble resin was performed to prepare the culture container of Example 6.
- Example 7 A culture container of Example 7 was prepared in the same manner as Example 4 except that the number of liquid guiding parts was one.
- the culture containers of Examples 1 to 7 were evaluated for the discharge and influx of the culture solution according to the following method. First, 6 mL of a culture solution was added to a culture vessel placed on a horizontal plane to make the total culture solution amount in the culture vessel 6 mL. Thereafter, the culture container is tilted at 20 degrees for 5 seconds so that the culture medium is discharged from the slits provided with the protruding portions of the liquid guiding part on both sides, and a part of the culture liquid in each well is placed in the corner of the culture container. The culture solution was immediately aspirated with an aspiration pipette using the aspiration pipette, and the aspiration of the culture vessel was returned to 0 degree.
- the culture containers of Examples 2 to 7 having the liquid guiding part are more excellent in the drainage of the culture liquid and the culture liquid than the culture containers of Example 1 having no liquid guiding part. It became clear that the inflow property of was even better. Therefore, in the culture containers of Examples 2 to 7, compared with the culture container of Example 1, the culture solution can be exchanged more efficiently.
- the present disclosure is useful in medical fields such as human ES cell research and regenerative medicine.
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Abstract
Description
(1)細胞塊を培養するための容器であって、前記細胞塊と培養液とを収容可能とする培養空間を有するウェルと、前記ウェルの開口を有する面上に配置され前記培養空間と連通した内腔を有する筒状体とを含み、前記筒状体の筒壁に、前記筒状体の外側に前記細胞塊を通過させることなく前記培養液を排出させうる1個以上の連通部が形成されている、細胞塊用培養容器。
(2)前記筒状体に複数の前記連通部が形成されている、(1)に記載の細胞塊用培養容器。
(3)前記連通部が、前記筒状体の中心軸と平行なスリットである、(1)又は(2)に記載の細胞塊用培養容器。
(4)前記連通部が、前記筒状体の周方向に沿ったスリットである、(1)又は(2)に記載の細胞塊用培養容器。
(5)前記スリットの幅が、0.1mm以上0.5mm以下である、(3)又は(4)に記載の細胞塊用培養容器。
(6)前記ウェルと前記筒状体とからなる構造体をその中心軸を含む平面で切断して平面的にみた場合、前記スリットの両端のうちの前記ウェルにより近い一方の端から前記ウェルの最深部までの長さが、3.0mm以上6.0mm以下である、(3)~(5)のいずれかに記載の細胞塊用培養容器。
(7)前記細胞塊用培養容器は複数の前記ウェルを含むマルチウェルプレート本体を含み、前記マルチウェルプレートの前記ウェルの開口を有する面上に複数の前記筒状体が配置されている、(1)~(6)のいずれかに記載の細胞塊用培養容器。
(8)前記連通部が、前記筒状体の中心軸と平行で前記筒状体の基端から形成されたスリットである、(7)に記載の細胞塊用培養容器。
(9)前記マルチウェルプレート本体と前記複数の筒状体とが同一金型内で成型された、(7)又は(8)に記載の細胞塊用培養容器。
(10)前記細胞塊用培養容器は、複数の前記ウェルと、前記ウェルの開口よりも上方に突出して前記複数のウェルを囲い平面視した時に見える形状が略矩形の側壁と、を含むマルチウェルプレート本体と、前記マルチウェルプレートの前記側壁によって囲われる空間内に配置された液流制御体と、を含み、前記液流制御体は、前記複数の筒状体と、前記マルチウェルプレート本体の前記ウェルの開口を有する面と接しないように配置され前記複数の筒状体を連結して前記複数の筒状体の連結体を形成する複数の架橋部と、一方の端部が前記連結体に連結され他方の端部が前記側壁と当接する少なくとも1対の位置規制部とを含み、互いに向かい合う側壁の内面の一方に、一方の位置規制部が当接し、互いに向かい合う側壁の内面の他方に、他方の位置規制部が当接する、(1)~(6)のいずれかに記載の細胞塊用培養容器。
(11)前記液流制御体は、前記マルチウェルプレート本体と別体である、(10)に記載の細胞塊用培養容器。
(12)液誘導部を更に含み、前記液誘導部は、前記ウェルと前記筒状体とからなる構造体の内面に配置された一対の突出部を含み、前記突出部は液誘導補助溝を形成し、前記突出部の上側端面は前記連通部の下側端よりも上方に配置されている、(1)~(11)のいずれかに記載の細胞塊用培養容器。
(13)前記突出部の前記培養空間と向かい合う面は、前記筒状体の中心軸に向かって突出した曲面である、(12)に記載の細胞塊用培養容器。
(14)前記突出部の上側端面から前記連通部の下側端までの長さが、0.1mm以上である、(12)又は(13)に記載の細胞塊用培養容器。
(15)前記連通部の下側端を通る円周上における一対の前記突出部間の距離は、0.3mm以上1.0mm以下である、(12)~(14)のいずれかに記載の細胞塊用培養容器。
(16)前記突出部の下側端部が前記ウェルの内面のうちの底面に達している、(12)~(15)のいずれかに記載の細胞塊用培養容器。
(17)前記液誘導部が、一対の前記突出部の下側端部を互いに連結し、前記液誘導補助溝の一方の終端を規定する面を含む基部を更に含む、(12)~(16)のいずれかに記載の細胞塊用培養容器。
(18)前記液誘導補助溝の一方の終端を規定する面は、前記連通部から前記培養空間内に流入し得る前記培養液の流れの下流側から上流側に向かって傾斜する傾斜面である、(17)に記載の細胞塊用培養容器。
(19)前記液誘導補助溝の閉塞端が前記ウェルの底部よりも上方に位置している、(12)~(18)のいずれかに記載の細胞塊用培養容器。
(20)前記ウェルの少なくとも底部の内面は、下記式(Ia)又は(Ib)で表される水溶性樹脂から形成された被覆層で被覆されている、(1)~(19)のいずれかに記載の細胞塊用培養容器。
(21)前記ウェルは、筒状の胴部と、前記胴部の一端に設けられた漏斗形状の底部とを有し、前記底部の中心部は、凹曲面であり、前記底部の開き角度は、60~100度であり、前記底部の前記凹曲面の曲率半径は、0.5~2.0mmである、(1)~(20)のいずれかに記載の細胞塊用培養容器。
(22)前記細胞塊が幹細胞である、(1)~(21)のいずれかに記載の細胞塊用培養容器。
(23)前記幹細胞が、ヒト胚性幹細胞(ヒトES細胞)又はヒト多能性幹細胞(ヒトiPS細胞)である、(22)に記載の細胞塊用培養容器。
(24)(1)~(23)のいずれかに記載の細胞塊用培養容器を用いて細胞塊を培養する培養方法であって、培養液が培養空間に充填された前記ウェル内で前記細胞塊を培養した後、前記細胞塊用培養容器を傾けることにより、前記ウェル内の培養液の一部を、前記連通部を通過させて前記筒状体の外側に排出させる工程を含む、細胞塊の培養方法。
[2]前記連通部が、前記筒状体の中心軸と平行なスリットである、[1]に記載の細胞塊用培養容器。
[3]前記スリットは、前記筒状体の基端から形成された、[2]に記載の細胞塊用培養容器。
[4]前記スリットの幅が、0.1mm以上0.5mm以下である、[2]又は[3]に記載の細胞塊用培養容器。
[5]各突出部の前記培養空間と向かい合う面は、前記筒状体の中心軸に向かって突出した曲面である、[1]~[4]のいずれかの項に記載の細胞塊用培養容器。
[6]前記突出部の上側端面から前記連通部の下側端までの長さが、0.1mm以上である、[1]~[5]のいずれかの項に記載の細胞塊用培養容器。
[7]前記連通部の下側端を通る円周上における前記突出部間の距離は、0.3mm以上1.0mm以下である、[1]~[6]のいずれかの項に記載の細胞塊用培養容器。
[8]各突出部の下側端部が前記ウェルの内面のうちの底面に達している、[1]~[7]のいずれかの項に記載の細胞塊用培養容器。
[9]前記液誘導部が、各突出部の下側端部を互いに連結し、前記液誘導補助溝の一方の終端を規定する面を含む基部を更に含む、[1]~[7]のいずれかの項に記載の細胞塊用培養容器。
[10]前記液誘導補助溝の一方の終端を規定する面は、前記連通部から前記培養空間内に流入し得る前記培養液の流れの下流側から上流側に向かって傾斜する傾斜面である、[9]に記載の細胞塊用培養容器。
[11]前記ウェルと前記筒状体とからなる構造体をその中心軸を含む平面で切断して平面的にみた場合、前記連通部の下側端から前記ウェルの最深部までの長さが、3.0mm以上6.0mm以下である、[1]~[10]のいずれかの項に記載の細胞塊用培養容器。
[12]前記ウェルは、筒状の胴部と、前記胴部の一端に設けられた漏斗形状の底部とを有し、前記底部の中心部は、凹曲面であり、前記底部の開き角度は、60~100度であり、前記底部の前記凹曲面の曲率半径は、0.5~2.0mmである、[1]~[11]のいずれかの項に記載の細胞塊用培養容器。
[13]前記液誘導補助溝の閉塞端が前記ウェルの前記底部よりも上方に位置している、[12]に記載の細胞塊用培養容器。
[14]前記細胞塊用培養容器は複数の前記ウェルを含むマルチウェルプレート本体を含み、前記マルチウェルプレートの前記ウェルの開口を有する面上に複数の前記筒状体が配置されている、[1]~[13]に記載の細胞塊用培養容器。
[15]前記マルチウェルプレート本体と複数の前記筒状体とが同一金型内で成型された、[14]に記載の細胞塊用培養容器。
[16]前記ウェルの少なくとも底部の内面は、下記式(Ia)又は(Ib)で表される水溶性樹脂を用いて形成された被覆層で被覆されている、請求項12又は13に記載の細胞塊用培養容器。
[17]前記細胞塊が幹細胞である、[1]~[16]のいずれかの項に記載の細胞塊用培養容器。
[18]前記幹細胞が、ヒト胚性幹細胞(ヒトES細胞)又はヒト多能性幹細胞(ヒトiPS細胞)である、[17]に記載の細胞塊用培養容器。
[19][1]~[18]のいずれかの項に記載の細胞塊用培養容器を用いて細胞塊を培養する培養方法であって、培養液が培養空間に充填された前記ウェル内で前記細胞塊を培養した後、前記細胞塊用培養容器を傾けることにより、前記ウェル内の培養液の一部を、前記連通部を通過させて前記構造体の外側に排出させる工程を含む、細胞塊の培養方法。
図1Aは、実施形態1の細胞塊用培養容器の平面図であり、図1Bは、図1Aの部分拡大図である。図2は、図1AのII-II’線に沿った矢視断面図であり、図3は、図1AのIII-III’線に沿った矢視断面図であり、図4は、図2の部分拡大図である。
次に、本開示の培養容器を用いて細胞塊を培養する方法について説明する。本開示にかかる細胞塊の培養方法(以下「培養方法」と略称する場合もある。)によれば、本開示にかかる培養容器を用いるため、細胞塊への影響が少なく、培養液を効率的に交換できるので、細胞塊の培養が効率的に行える。
図5は実施形態2の培養容器6の平面図である。図6は図5のVI-VI’線に沿った矢視拡大断面図である。図7は、図5のVII-VII’線に沿って切断した拡大端面図である。図8は、実施形態2の培養容器6を構成するマルチウェルプレート本体61の平面図であり、図9は図8のIX-IX’線に沿った矢視断面図である。図10は、実施形態2の培養容器6を構成する液流制御体800の平面図であり、図11は図10に示した液流制御体800の底面図であり、図12は、図10のXII-XII’線に沿った矢視拡大断面図であり、図13は図10の拡大側面図であり、図14は図11に示した液流制御体800の拡大斜視図である。
図15Aは、実施形態3の細胞塊用培養容器100の平面図であり、図15Bは、図15Aの部分拡大図である。図16は、図15AのXVI-XVI’線に沿った矢視拡大断面図である。図17Aは、図15AのXVII-XVII’線に沿った矢視拡大断面図であり、図17Bは、図17Aの部分拡大図である。図18は、図16の部分拡大図であり、図19は、細胞塊用培養容器100の筒状体3とウェル21とからなる構造体12の内部構造を説明する斜視断面図である。図20は、図15Aの部分拡大図であり、図21は、本開示の細胞塊用培養容器100を用いて細胞塊14を所定時間培養液13中で培養した後、ウェル21内の培養液13の一部を連通部3aを通過させて構造体12外へ排出した後の状態を説明する概念図である。
図22Aは実施形態4の培養容器200の平面図であり、図22Bは、図22Aの部分拡大図である。図23は図22AのXXIII-XXIII’線に沿った矢視拡大断面図である。図24Aは、図22AのXXIV-XXIV’線に沿った矢視拡大断面図であり、図24Bは、図24Aの部分拡大図である。図25は、図23の部分拡大図であり、図26は、細胞塊用培養容器200の筒状体3とウェル21とからなる構造体12の内部構造を説明する斜視断面図である。図27は、本開示の細胞塊用培養容器200を用いて細胞塊14を所定時間培養液13中で培養した後、ウェル21内の培養液の一部を排出した後の状態を説明する概念図である。
[細胞塊の培養容器の製造]
ポリスチレン樹脂(PSジャパン社製、商品名:HF77)を用いて、射出成形により24ウェルマルチウェルプレート(横:65.0mm、縦:50.0mm、高さ:20.5mm)を成形した。本実施例における培養容器の形状は図1A~図3に示す形状とし、ウェルの形状は図4に示す形状とし、底部の開き角度(図4におけるθ)は85度、底部中心部における内面の曲率半径R1は2.0mmとした。各ウェルの開口における直径は6.2mm、深さは5.0mm、胴部の深さは2.6mmとした。また、各筒状体の、内径は6.2mm、高さは5.0mm、側壁の厚みは0.8mmとし、ウェルと筒状体とからなる構造体の内側空間の1個当たりの容量は、約250μLとした。筒状体には約45度おきにスリットの幅W1が0.3mmの連通部を計8ヶ所設けた。
次に、ウェルの表面処理を行うために、水溶性樹脂として側鎖にアジド基を有するポリビニルアルコール(東洋合成工業社製 AWP(Azide-unit pendant Water soluble Photopolymer、r1=1~1000、r2=4~4995、r3=0~4000、n=1,2、または3、Rは下記式(II)で表される基):下記式(Ia)で表される化合物(水溶性樹脂の平均重合度1600、感光基の導入率0.65mol%))を茶色顔料で着色した遮光ポリプロプレン容器中で、25体積%エタノール水溶液に溶解し、0.5重量%の水溶性樹脂溶液を調製した。
HepG2を培養液(ダルベッコ改変MEM+10体積%ウシ胎児血清)に3×104cells/mLの濃度で分散させた細胞懸濁液を調製し、PrimeSurface(登録商標)96Vプレート(住友ベークライト、MS-9096V)に、100μL/ウェルずつ分注し、5%炭酸ガス、湿度99%、温度37℃の炭酸ガス培養容器の中で培養を行った。6日後に各ウェルに直径が約700μmのサイズの1個の細胞塊(スフェロイド)が形成されていることを、顕微鏡下で確認した。
実施例1の[HepG2(ヒト肝癌由来細胞)を用いた細胞塊(スフェロイド)の形成]に従って、直径が約700μmのサイズの1個の細胞塊(スフェロイド)を96個形成した。次いで、各ウェル中の細胞塊を培養液ごと実施例1と同様に回収し、1枚につき24個の細胞塊を、4枚のPrimaSuface60mmシャーレ(MS-9060X、住友ベークライト社製)に移し替えた。96ウェル全ての細胞塊(スフェロイド)をシャーレに移し替えた後、新しい培養液をシャーレ1枚につき1.84mLに加えて、シャーレ内の培養液量を4mLとした。
[細胞塊の培養容器の製造]
ポリスチレン樹脂(PSジャパン社製、商品名:HF77)を用いて、射出成形により24ウェルマルチウェルプレート(横:65.0mm、縦:50.0mm、高さ:20.5mm)を成形した。本実施例における培養容器の形状は図22A~図27に示す形状とし、ウェルの形状は図25に示す形状とし、底部の開き角度(図25におけるθ)は85度、底部中心部における内面の曲率半径R1は2.0mmとした。各ウェルの開口における直径は6.2mm、深さは5.0mm、胴部の深さは2.6mmとした。また、各筒状体の内径は6.2mm、高さは5.0mm、側壁の厚みは0.8mm、ウェルと筒状体とからなる構造体の内側空間の1個当たりの容量は約250μL、構造体におけるスリットの下側端よりも下方部分の容量、即ち、ウェル1個当たりの容量は、約105μLとした。筒状体には約45度おきに幅W1(図22B参照)が0.3mmのスリットを連通部として計8ヶ所設けた。また、ウェルと筒状体とからなる構造体に液誘導部を2つ設けた。W4(図23参照)は0.3mm、W5(図24B参照)は0.5mmとした。液導入補助溝の一方の終端(閉塞端)を規定する面の傾斜角度α(図25参照)は45度、ウェル内における液導入補助溝の上下方向の長さH3(図25参照)は1.5mmとした。突出部を筒状体の中心軸と直交する方向面で切断した切断面の形状は略弓形(2つの円の重なり部分により規定される形)であり、当該弓形を構成し、筒状体の中心軸方向に突出した曲線は、中心がスリットの幅方向中心を通り筒状体の内面を含む円周の接線上にあり、曲率半径R2(図20参照)が0.7mmの円周の一部であった。
次に、実施例1の培養容器と同様にしてウェルの表面処理を行い、実施例2の培養容器を得た。
傾斜角度αを0度としたこと以外は、実施例2と同様にして実施例3の培養容器を作製した。
H3を1.0mmとしたこと以外は、実施例2と同様にして実施例4の培養容器を作製した。
傾斜角度αを0度とし、H3を0.5mmとしたこと以外は、実施例2と同様にして実施例5の培養容器を作製した。
ポリスチレン樹脂(PSジャパン社製、商品名:HF77)を用いて、射出成形により24ウェルマルチウェルプレート(横:65.0mm、縦:50.0mm、高さ:20.5mm)を成形した。本実施例における培養容器の形状は図15A~図21に示す形状とし、ウェルの形状は図18に示す形状とし、底部の開き角度(図18におけるθ)は85度、底部中心部における内面の曲率半径R1は2.0mmとした。各ウェルの開口における直径は6.2mm、深さは5.0mm、胴部の深さは2.6mmとした。また、各筒状体の、内径は6.2mm、高さは5.0mm、側壁の厚みは0.8mmとし、ウェルと筒状体とからなる構造体の内側空間の1個当たりの容量は、約250μL、構造体におけるスリットの下側端よりも下方部分の容量、即ち、ウェル1個当たりの容量は約105μLとした。筒状体には約45度おきに幅W1(図22B参照)が0.3mmのスリットを連通部として計8ヶ所設けた。また、ウェルと筒状体とからなる構造体に液誘導部として、一対の突出部を2つ設けた。W4(図16参照)は0.3mm、W5(図17B参照)は0.5mmとした。また、ウェル内における液導入補助溝の上下方向の長さH3は3.52mmとした。突出部を筒状体の中心軸と直交する方向面で切断した切断面の形状は略弓形(2つの円の重なり部分により規定される形)であり、当該弓形を構成し、筒状体の中心軸方向に突出した曲線は、中心がスリットの幅方向中心を通り筒状体の内面を含む円周の接線上にあり、曲率半径R2(図20参照)が0.7mmの円周の一部であった。実施例2と同様に、水溶性樹脂を用いた表面処理を行って実施例6の培養容器を作成した。
液誘導部の数を1つとしたこと以外は、実施例4と同様にして実施例7の培養容器を作成した。
実施例1~7の培養容器について、以下の方法に従って、培養液の排出性及び流入性の評価を行った。まず、水平面上に置いた培養容器内に、培養液を6mL加え、培養容器内の全培養液量を6mLとした。その後、培養容器を、液誘導部の突出部が両側に設けられたスリットから培養液が排出されるように、20度に5秒間傾けて各ウェル内の培養液の一部を培養容器の隅に集め、直ちに当該培養液を、アスピレーションピペットを用いて約5mL以上(5.2~5.9mL)吸引し、吸引後、培養容器の傾きを0度に戻した。その後、各ウェル内に残存する培養液量を、マイクロピペットを使用して回収・計量し、下記[評価基準1]に基づいて、培養液の排出性を評価し、その結果を表1にした。その後、新鮮培養液約5mLを培養容器の隅に入れ、10秒の静置後に、各ウェル内に入っている培養液の量を観察した。また、下記[評価基準2]に基づいて、培養液のウェル内への流入性を評価し、その結果を表1に示した。
A:ウェル内に残存する培養液量がウェル容量(105μL)の15分の1以上4分の1以下
B:ウェル内に残存する培養液量がウェル容量(105μL)15分の1未満
C:ウェル内に残存する培養液量がウェル容量(105μL)の4分の1を超える
A:ウェル内に培養液が入り、培養容器内の培養液面はスリットの下側端よりも上方にあり、ウェルと筒状体からなる構造体内における培養液面と構造体外における培養液面とが同一平面内にある。
B:ウェル内に培養液が入らず、ウェル内の培養液面はスリットの下側端よりも下方にあり、ウェルと筒状体からなる構造体内における培養液面の方が構造体外における培養液面よりも低い。
Claims (24)
- 細胞塊を培養するための容器であって、
前記細胞塊と培養液とを収容可能とする培養空間を有するウェルと、
前記ウェルの開口を有する面上に配置され前記培養空間と連通した内腔を有する筒状体とを含み、
前記筒状体の筒壁に、前記筒状体の外側に前記細胞塊を通過させることなく前記培養液を排出させうる1個以上の連通部が形成されている、細胞塊用培養容器。 - 前記筒状体に複数の前記連通部が形成されている、請求項1に記載の細胞塊用培養容器。
- 前記連通部が、前記筒状体の中心軸と平行なスリットである、請求項1又は2に記載の細胞塊用培養容器。
- 前記連通部が、前記筒状体の周方向に沿ったスリットである、請求項1又は2に記載の細胞塊用培養容器。
- 前記スリットの幅が、0.1mm以上0.5mm以下である、請求項3又は4に記載の細胞塊用培養容器。
- 前記ウェルと前記筒状体とからなる構造体をその中心軸を含む平面で切断して平面的にみた場合、前記スリットの両端のうちの前記ウェルにより近い一方の端から前記ウェルの最深部までの長さが、3.0mm以上6.0mm以下である、請求項3~5のいずれか一項に記載の細胞塊用培養容器。
- 前記細胞塊用培養容器は複数の前記ウェルを含むマルチウェルプレート本体を含み、
前記マルチウェルプレートの前記ウェルの開口を有する面上に複数の前記筒状体が配置されている、請求項1~6のいずれか一項に記載の細胞塊用培養容器。 - 前記連通部が、前記筒状体の中心軸と平行で前記筒状体の基端から形成されたスリットである、請求項7に記載の細胞塊用培養容器。
- 前記マルチウェルプレート本体と前記複数の筒状体とが同一金型内で成型された、請求項7又は8に記載の細胞塊用培養容器。
- 前記細胞塊用培養容器は、
複数の前記ウェルと、前記ウェルの開口よりも上方に突出して前記複数のウェルを囲い平面視した時に見える形状が略矩形の側壁と、を含むマルチウェルプレート本体と、
前記マルチウェルプレートの前記側壁によって囲われる空間内に配置された液流制御体と、を含み、
前記液流制御体は、
前記複数の筒状体と、
前記マルチウェルプレート本体の前記ウェルの開口を有する面と接しないように配置され前記複数の筒状体を連結して前記複数の筒状体の連結体を形成する複数の架橋部と、
一方の端部が前記連結体に連結され他方の端部が前記側壁と当接する少なくとも1対の位置規制部とを含み、
互いに向かい合う側壁の内面の一方に、一方の位置規制部が当接し、互いに向かい合う側壁の内面の他方に、他方の位置規制部が当接する、請求項1~6のいずれか一項に記載の細胞塊用培養容器。 - 前記液流制御体は、前記マルチウェルプレート本体と別体である、請求項10に記載の細胞塊用培養容器。
- 液誘導部を更に含み、前記液誘導部は、前記ウェルと前記筒状体とからなる構造体の内面に配置された一対の突出部を含み、前記突出部は液誘導補助溝を形成し、前記突出部の上側端面は前記連通部の下側端よりも上方に配置されている、請求項1~11のいずれか一項に記載の細胞塊用培養容器。
- 前記突出部の前記培養空間と向かい合う面は、前記筒状体の中心軸に向かって突出した曲面である、請求項12に記載の細胞塊用培養容器。
- 前記突出部の上側端面から前記連通部の下側端までの長さが、0.1mm以上である、請求項12又は13に記載の細胞塊用培養容器。
- 前記連通部の下側端を通る円周上における一対の前記突出部間の距離は、0.3mm以上1.0mm以下である、請求項12~14のいずれか一項に記載の細胞塊用培養容器。
- 前記突出部の下側端部が前記ウェルの内面のうちの底面に達している、請求項12~15のいずれか一項に記載の細胞塊用培養容器。
- 前記液誘導部が、一対の前記突出部の下側端部を互いに連結し、前記液誘導補助溝の一方の終端を規定する面を含む基部を更に含む、請求項12~16のいずれか一項に記載の細胞塊用培養容器。
- 前記液誘導補助溝の一方の終端を規定する面は、前記連通部から前記培養空間内に流入し得る前記培養液の流れの下流側から上流側に向かって傾斜する傾斜面である、請求項17に記載の細胞塊用培養容器。
- 前記液誘導補助溝の閉塞端が前記ウェルの底部よりも上方に位置している、請求項12~18のいずれか一項に記載の細胞塊用培養容器。
- 前記ウェルは、筒状の胴部と、前記胴部の一端に設けられた漏斗形状の底部とを有し、
前記底部の中心部は、凹曲面であり、
前記底部の開き角度は、60~100度であり、
前記底部の前記凹曲面の曲率半径は、0.5~2.0mmである、請求項1~20のいずれか一項に記載の細胞塊用培養容器。 - 前記細胞塊が幹細胞である、請求項1~21のいずれか一項に記載の細胞塊用培養容器。
- 前記幹細胞が、ヒト胚性幹細胞(ヒトES細胞)又はヒト多能性幹細胞(ヒトiPS細胞)である、請求項22に記載の細胞塊用培養容器。
- 請求項1~23のいずれか一項に記載の細胞塊用培養容器を用いて細胞塊を培養する培養方法であって、
培養液が培養空間に充填された前記ウェル内で前記細胞塊を培養した後、前記細胞塊用培養容器を傾けることにより、前記ウェル内の培養液の一部を、前記連通部を通過させて前記筒状体の外側に排出させる工程を含む、細胞塊の培養方法。
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- 2015-05-20 US US15/310,224 patent/US10472598B2/en active Active
- 2015-05-20 CN CN201580018095.2A patent/CN106164244B/zh active Active
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| US11470841B2 (en) | 2016-06-15 | 2022-10-18 | Nissan Chemical Corporation | Cryopreservation vessel |
| JP2018000134A (ja) * | 2016-07-06 | 2018-01-11 | 大日本印刷株式会社 | 細胞培養容器 |
| JP2018000158A (ja) * | 2016-07-07 | 2018-01-11 | シャープ株式会社 | センサ装置 |
| JP2018014961A (ja) * | 2016-07-29 | 2018-02-01 | 川崎重工業株式会社 | 薬液交換装置 |
| US11360078B2 (en) | 2016-09-29 | 2022-06-14 | Sumitomo Rubber Industries, Ltd. | Medical analysis device and cell analysis method |
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| CN110087772A (zh) * | 2016-11-17 | 2019-08-02 | 克利夫兰州立大学 | 用于微阵列3d生物打印的芯片平台 |
| US11390836B2 (en) * | 2016-11-17 | 2022-07-19 | Cleveland State University | Chip platforms for microarray 3D bioprinting |
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| JP7023277B2 (ja) | 2017-03-31 | 2022-02-21 | 株式会社ナガヨシ | 生体内環境に近い培養容器およびそれを備える培養ディッシュ |
| JPWO2018181763A1 (ja) * | 2017-03-31 | 2020-02-06 | 有限会社乾メディカル | 生体内環境に近い培養容器およびそれを備える培養ディッシュ |
| US20220193667A1 (en) * | 2017-06-05 | 2022-06-23 | 10X Genomics, Inc. | Gaskets for the distribution of pressures in a microfluidic system |
| US12291701B2 (en) | 2017-09-26 | 2025-05-06 | Nissan Chemical Corporation | Cell culture container having minute volume |
| US11573232B2 (en) | 2018-02-14 | 2023-02-07 | Sumitomo Rubber Industries, Ltd. | Method for capturing specific cells |
| US11614440B2 (en) | 2019-01-24 | 2023-03-28 | Sumitomo Rubber Industries, Ltd. | Specific cell fractionating and capturing methods |
| WO2021026010A1 (en) * | 2019-08-02 | 2021-02-11 | Molecular Devices, Llc | Method and system for cultivating cells in media-exchanging wells |
| WO2022158609A1 (ja) * | 2021-01-25 | 2022-07-28 | ニッタ株式会社 | 細胞培養容器 |
| WO2023233827A1 (ja) * | 2022-06-03 | 2023-12-07 | 富士フイルム株式会社 | 位相画像取得方法及び定量データ取得方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101756051B1 (ko) | 2017-07-07 |
| CN106164244B (zh) | 2017-11-28 |
| JPWO2015178413A1 (ja) | 2017-04-20 |
| US20170267960A1 (en) | 2017-09-21 |
| US10472598B2 (en) | 2019-11-12 |
| EP3112454B1 (en) | 2018-02-14 |
| KR20160117631A (ko) | 2016-10-10 |
| EP3112454A4 (en) | 2017-02-22 |
| JP5950055B2 (ja) | 2016-07-13 |
| EP3112454A1 (en) | 2017-01-04 |
| CN106164244A (zh) | 2016-11-23 |
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