WO2019168118A1 - マイクロ流路デバイス - Google Patents
マイクロ流路デバイス Download PDFInfo
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- WO2019168118A1 WO2019168118A1 PCT/JP2019/007907 JP2019007907W WO2019168118A1 WO 2019168118 A1 WO2019168118 A1 WO 2019168118A1 JP 2019007907 W JP2019007907 W JP 2019007907W WO 2019168118 A1 WO2019168118 A1 WO 2019168118A1
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- microchannel
- flow path
- reinforcing member
- porous film
- channel
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/02—Form or structure of the vessel
- C12M23/16—Microfluidic devices; Capillary tubes
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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
- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
- B01L3/502707—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by the manufacture of the container or its components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B1/00—Devices without movable or flexible elements, e.g. microcapillary devices
- B81B1/002—Holes characterised by their shape, in either longitudinal or sectional plane
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B3/00—Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M25/00—Means for supporting, enclosing or fixing the microorganisms, e.g. immunocoatings
- C12M25/02—Membranes; Filters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
- G01N33/54366—Apparatus specially adapted for solid-phase testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N37/00—Details not covered by any other group of this subclass
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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
- B01L2300/0816—Cards, e.g. flat sample carriers usually with flow in two horizontal directions
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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
- B01L2300/0887—Laminated structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B2203/00—Basic microelectromechanical structures
- B81B2203/03—Static structures
- B81B2203/0323—Grooves
- B81B2203/0338—Channels
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M1/00—Apparatus for enzymology or microbiology
- C12M1/34—Measuring or testing with condition measuring or sensing means, e.g. colony counters
Definitions
- This disclosure relates to a microchannel device.
- microchannel device A device having a micrometer order width channel called a microchannel (hereinafter referred to as “microchannel device”) is known.
- microchannel device discloses an organ mimic device having a first central microchannel and a second microchannel partitioned by a porous membrane as a microchannel device.
- the central portion of the upper first central microchannel and the lower second central microchannel overlap in the plan view, and the inlet port and the outlet port are separated from each other.
- a step portion is formed at a joining portion where the first center microchannel and the lower second center microchannel join in plan view.
- a cell suspension is allowed to flow through the first microchannel to form a cell layer on the surface of the porous membrane.
- the porous membrane is bent by the fluid pressure of the cell suspension, so that a gap is generated between the stepped portion and the porous membrane.
- a test solution for example, a liquid containing a blood diluent, a tracer such as FITC-microbead
- the present disclosure suppresses the formation of a gap between the step formed between the first microchannel and the second microchannel and the porous membrane, and cells, red blood cells, or tracers flow into the gap.
- a microchannel device capable of suppressing this.
- the microchannel device is formed in the first microchannel and the second channel member formed in the first channel member, and at least a part of the microchannel device in the plan view is the first microchannel device.
- a second micro-channel having a step formed between the first micro-channel and the first micro-channel, and a plurality of holes penetrating in the thickness direction.
- a porous membrane disposed between the path members and partitioning the first microchannel and the second microchannel, and provided between the first channel member or the second channel member and the porous membrane, and more rigid than the porous membrane And a reinforcing member that reinforces at least a portion facing the step portion of the porous film.
- the step is formed between the first microchannel and the second microchannel, and the portion facing the step of the porous film is reinforced by the reinforcing member. For this reason, when the cell suspension is caused to flow through the first microchannel or the second microchannel to form a cell layer on the surface of the porous membrane, the porous membrane is bent by the fluid pressure of the cell suspension and the step portion It can suppress that a clearance gap produces between a porous membrane and a cell, and can suppress that a cell flows into this clearance gap.
- the porous film is bent by the liquid pressure of the test liquid, and a gap is generated between the step portion and the porous film. It is possible to suppress red blood cells or tracers from flowing into this gap.
- the microchannel device according to the second aspect of the present disclosure is the microchannel device according to the first aspect, wherein the first microchannel and the second microchannel are partially separated in plan view, and the step portion Are formed at the junction where the first microchannel and the second microchannel merge in plan view.
- the porous film is reinforced with the reinforcing member, whereby the step portion and the porous film are It can suppress that a clearance gap arises between them.
- the microchannel device according to the third aspect of the present disclosure is the microchannel device according to the first aspect, in which the width of the first microchannel is narrower than the width of the second microchannel, and the stepped portion is the first microchannel device. It is formed by the difference in width between the channel and the second micro channel.
- the gap is formed between the step portion and the porous membrane by reinforcing the porous membrane with the reinforcing member. It is possible to suppress the occurrence.
- the microchannel device is the microchannel device according to any one of the first to third aspects, wherein the reinforcing member is sized to cover the entire porous membrane, In the part where the membrane faces the first microchannel or the second microchannel, a slit is formed in the reinforcing member.
- the porous membrane can be further reinforced by covering the entire porous membrane with the reinforcing member. Further, by forming a slit in the reinforcing member, when the cell, red blood cell, or tracer moves between the first micro flow channel and the second micro flow channel through the porous film, the cell, red blood cell, or tracer Can be prevented from being inhibited by the reinforcing member.
- the microchannel device according to the fifth aspect of the present disclosure is the microchannel device according to the fourth aspect, wherein the width of the slit of the reinforcing member is equal to or less than the width of the first microchannel and the second microchannel. Yes.
- the width of the slit of the reinforcing member is equal to or less than the width of the first microchannel and the second microchannel. For this reason, compared with the case where the width
- the microchannel device according to the sixth aspect of the present disclosure is the microchannel device according to any one of the first to fifth aspects, wherein the reinforcing member is a membrane member made of polyethylene terephthalate.
- the reinforcing member is a membrane member made of polyethylene terephthalate that hardly influences cell culture
- the components contained in the reinforcing member are cells in the first microchannel or the second microchannel. Etc. can be suppressed.
- the microchannel device according to the seventh aspect of the present disclosure is the microchannel device according to any one of the first to fifth aspects, wherein the reinforcing member is a membrane member made of polypropylene.
- the reinforcing member is a membrane member made of polypropylene that does not easily affect cell culture
- the components contained in the reinforcing member are cells in the first microchannel or the second microchannel. Can be suppressed.
- the microchannel device according to the eighth aspect of the present disclosure is the microchannel device according to any one of the first to seventh aspects, wherein the thickness of the reinforcing member is 12 ⁇ m or more.
- the rigidity of the reinforcing member can be increased by setting the thickness of the reinforcing member made of polyethylene terephthalate to 12 ⁇ m or more compared to the configuration in which the thickness of the reinforcing member is less than 12 ⁇ m.
- the porous film can be reinforced more strongly by the reinforcing member.
- the microchannel device according to the ninth aspect of the present disclosure is the microchannel device according to any one of the first to eighth aspects, wherein the thickness of the reinforcing member is the first microchannel and the second microchannel. It is thinner than the depth of the flow path.
- the thickness of the reinforcing member is made thinner than the depth of the first microchannel and the second microchannel. For this reason, compared with the case where the thickness of the reinforcing member is larger than the depth of the first microchannel and the second microchannel, the cell suspension is made to flow through the first microchannel or the second microchannel.
- the cell layer is formed on the surface of the membrane, it is possible to suppress inhibition of cell seeding on the porous membrane by the reinforcing member.
- a gap from being formed between the step portion formed between the first microchannel and the second microchannel and the porous membrane, and a cell, a red blood cell, or a tracer is formed in the gap. Can be prevented from flowing in.
- FIG. 4 is a sectional view taken along line AA in FIG. 3.
- FIG. 4 is a sectional view taken along line BB in FIG. 3.
- FIG. 7 is a sectional view taken along line CC in FIG. 6. It is a disassembled perspective view which shows the whole structure of the microchannel device in 2nd Embodiment.
- FIG. 10B is a sectional view taken along line DD in FIG. 10A. It is an enlarged plan view which shows the state which poured the cell suspension into the microchannel device of the comparative example.
- FIG. 11B is a sectional view taken along line EE in FIG. 11A.
- the microchannel device 10 of the present embodiment includes a channel unit 16 including a first channel member 12 and a second channel member 14 stacked in the thickness direction. ing.
- the first flow path member 12 is made of a transparent material having elasticity such as PDMS (polydimethylsiloxane) as an example, and the second flow path member 14 has rigidity such as COP (cycloolefin polymer) as an example. It is preferable to be comprised with the transparent material which has.
- epoxy-type resin epoxy-type resin
- urethane-type resin urethane-type resin
- styrene-type thermoplasticity examples thereof include elastomers, olefinic thermoplastic elastomers, acrylic thermoplastic elastomers, and polyvinyl alcohol.
- a first microchannel 18 is formed on the lower surface of the first channel member 12, that is, the surface 12 ⁇ / b> A facing the second channel member 14.
- the first microchannel 18 has an inlet 18A, an outlet 18B, and a channel 18C that communicates the inlet 18A and the outlet 18B and extends substantially linearly.
- the second micro-channel 20 is formed on the upper surface of the second channel member 14, that is, the surface 14A facing the first channel member 12.
- the second microchannel 20 has an inflow port 20A, an outflow port 20B, and a channel portion 20C that communicates the inflow port 20A and the outflow port 20B and extends substantially linearly.
- the inlet 18A and the outlet 18B of the first microchannel 18 are provided at positions separated from the inlet 20A and the outlet 20B of the second microchannel 20 in plan view.
- the channel portion 18C of the first microchannel 18 is provided at a position overlapping the channel portion 20C of the second microchannel 20 in plan view.
- the merged portion of the first microchannel 18 and the second microchannel 20, that is, between the inlets 18 ⁇ / b> A and 20 ⁇ / b> A and the channels 18 ⁇ / b> C and 20 ⁇ / b> C, and the flow Step portions 22 are respectively formed between the outlets 18B and 20B and the flow path portions 18C and 20C.
- the width of the flow path portion 18C of the first micro flow path 18 is narrower than the width of the flow path section 20C of the second micro flow path 20, and the flow path section 18C.
- the step portion 24 is formed by the difference in the width of the flow path portion 20C.
- the first channel member 12 penetrates the first channel member 12 in the thickness direction, and the lower end communicates with the inlet 18A and the outlet 18B of the first microchannel 18. Holes 26A and 26B and through holes 28A and 28B whose lower ends communicate with the inlet 20A and the outlet 20B of the second microchannel 20 are formed, respectively.
- a holding plate 30 having a size covering the entire upper surface of the first flow path member 12 is provided on the upper side of the first flow path member 12.
- a plurality (eight in this embodiment) of bolt holes 32 penetrating in the thickness direction are formed at positions corresponding to each other of the holding plate 30 and the second flow path member 14.
- a recess 34 is formed on the outer peripheral surface of the first flow path member 12 at a position corresponding to the bolt hole 32, and the holding plate 30 and the second flow are formed outside the recess 34 of the flow path unit 16.
- a plurality (eight in this embodiment) of spacers 36 that define the distance from the path member 14 are provided.
- the spacer 36 is a cylindrical member having an inner diameter that is substantially the same as the inner diameter of the bolt hole 32, and is disposed at a position corresponding to the bolt hole 32. Further, the holding plate 30 and the second flow path member 14 are joined together with a reinforcing member 54 described later by a plurality of bolts 40 inserted through the bolt holes 32 and the spacers 36 and fixed by the nuts 38.
- the holding plate 30 is formed with through holes 42A, 42B, 44A, and 44B that communicate with the through holes 26A, 26B, 28A, and 28B of the first flow path member 12, respectively.
- Tubes (not shown) are connected to the through holes 42A, 42B, 44A, and 44B, respectively, and a solution, a cell suspension, or the like flows into the first microchannel 18 and the second microchannel 20 through the tubes.
- a solution, a cell suspension, or the like flows out from the 1 microchannel 18 and the second microchannel 20.
- a porous film 46 is disposed between the facing surfaces 12A and 14A of the first flow path member 12 and the second flow path member 14.
- the porous film 46 is made of a hydrophobic polymer that can be dissolved in a hydrophobic organic solvent.
- the hydrophobic organic solvent is a liquid having a solubility in water of 25 ° C. of 10 (g / 100 g water) or less.
- Hydrophobic polymers include polystyrene, polyacrylate, polymethacrylate, polyacrylamide, polymethacrylamide, polyvinyl chloride, polyvinylidene chloride, polyvinylidene fluoride, polyhexafluoropropene, polyvinyl ether, polyvinyl carbazole, polyvinyl acetate, polytetra Fluoroethylene, polyester (eg, polyethylene terephthalate, polyethylene naphthalate, polyethylene succinate, polybutylene succinate, polylactic acid, poly-3-hydroxybutyrate, etc.), polylactone (eg, polycaprolactone, etc.), polyamide or polyimide (eg, , Nylon, polyamic acid, etc.), polyurethane, polyurea, polybutadiene, polycarbonate, polyaromatics, polysulfo , Polyethersulfone, polysiloxane derivatives, cellulose acylate (e.g., triacetyl
- These polymers may be homopolymers, copolymers, polymer blends, or polymer alloys as necessary from the viewpoints of solubility in solvents, optical properties, electrical properties, film strength, elasticity, and the like. These polymers may be used alone or in combination of two or more.
- the material of the porous film 46 is not limited to a hydrophobic polymer, and various materials can be selected from the viewpoint of cell adhesiveness.
- the upper surface 46A and the lower surface 46B of the porous film 46 are the channel portions of the first microchannel 18 and the second microchannel 20.
- the first microchannel 18 and the second microchannel 20 are separated from each other.
- the upper surface 46A of the porous film 46 faces the first microchannel 18, and the lower surface 46B of the porous film 46 faces the second microchannel 20.
- a plurality of holes 48 penetrating in the thickness direction are formed in the porous film 46, and openings 48 ⁇ / b> A of the holes 48 are formed on the upper surface 46 ⁇ / b> A and the lower surface 46 ⁇ / b> B of the porous film 46, respectively.
- the opening 48A has a circular shape in plan view.
- the openings 48A are provided apart from each other, and a flat portion 50 extends between the adjacent openings 48A.
- the opening 48A is not limited to a circular shape, and may be a polygonal shape or an elliptical shape.
- the plurality of openings 48A are regularly arranged, and in this embodiment, as an example, the openings 48A are arranged in a honeycomb shape.
- the honeycomb arrangement is an arrangement in which a parallel hexagon (preferably a regular hexagon) or a shape close thereto is used as a unit, and the center of the opening 48A is located at the intersection of a vertex and a diagonal line of these figures.
- the “center of the opening” means the center of the opening 48A in plan view.
- the arrangement of the openings 48A is not limited to a honeycomb shape, and may be a lattice shape or a face-centered lattice shape.
- the grid-like arrangement is an arrangement in which a parallelogram (including, of course, a square, a rectangle, and a rhombus is included. Preferably, a square) or a shape close thereto is used as a unit, and the center of the opening is located at the apex of these figures. is there.
- the face-centered lattice arrangement includes parallelograms (including, of course, squares, rectangles, and rhombuses, preferably squares) or a shape close to this, and an opening at the intersection of the vertices and diagonals of these figures. It is an arrangement where the center is located.
- the hole 48 of the porous film 46 has a spherical base shape with the upper end and the lower end of the sphere cut off.
- the adjacent holes 48 communicate with each other through the communication holes 52 inside the porous film 46.
- one hole 48 communicates with all adjacent holes 48.
- one hole 48 is The six communication holes 52 communicate with the six adjacent holes 48 respectively.
- the hole 48 may have a barrel shape, a cylindrical shape, a polygonal column shape, or the like, and the communication hole 52 may be a cylindrical gap that connects adjacent holes 48.
- the cells on the main surface of the porous membrane 46 are seeded with fibronectin, collagen (for example, type I collagen, type IV collagen, or type V collagen), laminin, vitronectin, gelatin, perlecan, nidogen, proteoglycan, It is preferably coated with at least one selected from the group consisting of osteopontin, tenascin, nephronectin, basement membrane matrix and polylysine. Moreover, it is preferable that the pores 48 of the porous film 46 are also covered with at least one of these. By covering the porous film 46, it becomes possible to enhance the adhesion of cells.
- the porous membrane 46 is a scaffold in which cells adhere and proliferate.
- At least one of cell-cell interaction with cells that is, information transmission by humoral factors and cell-cell contact is activated.
- the cell-cell interaction in the cell culture on the main surface of the porous membrane 46 becomes more active, it becomes possible to manufacture a model having a function that approximates the tissue in the living body.
- Examples of a method for producing the porous film 46 in which the holes 48 are formed include an etching method, a sand blasting method, a press molding method and the like in addition to a nanoprinting method and a dew condensation method.
- the nanoprint method is a method for producing the holes 48 by pouring a material constituting the porous film 46 into a mold having an uneven shape, or pressing the mold against the material constituting the porous film 46.
- the dew condensation method is a method in which the surface of the material constituting the porous film 46 is dewed and the holes 48 are formed by using water droplets as a mold.
- the dew condensation method can reduce the film thickness of the porous film 46 and increase the porosity and the opening ratio of the opening 48A.
- the communication hole 52 can be provided.
- the porous film 46 is produced by the dew condensation method. Details of the condensation method are described in, for example, Japanese Patent No. 4945281, Japanese Patent No. 5422230, Japanese Patent Application Laid-Open No. 2011-74140, and Japanese Patent No. 5405374.
- a reinforcing member 54 having higher rigidity than the porous film 46 is disposed between the porous film 46 and the facing surface 14A of the second flow path member 14.
- the reinforcing member 54 is a film member made of polyethylene terephthalate, and has a size covering the entire porous film 46.
- the reinforcing member 54 has substantially the same size as the facing surface 14 ⁇ / b> A of the second flow path member 14, and is between the first micro flow path 18 and the second micro flow path 20 in the porous film 46. The portions facing the formed step portions 22 and 24 are covered.
- the thickness of the reinforcing member 54 is preferably 12 ⁇ m or more and thinner than the depth of the first microchannel 18 or the second microchannel 20, and specifically, the thickness of the reinforcing member 54 is More preferably, it is 12 ⁇ m or more and 400 ⁇ m or less, and further preferably 12 ⁇ m or more and 200 ⁇ m or less.
- the rigidity of the reinforcing member 54 can be evaluated by measuring the deformation amount of the reinforcing member 54 when a steel ball is placed on the reinforcing member 54. Specifically, a 3 mm thick SUS (stainless steel) plate with a 50 mm hole was prepared, and four sides of a 70 mm square reinforcing member 54 were fixed on the plate with double-sided tape (Nitto Denko No. 5000NS). To do.
- a steel ball having a diameter of 11 mm and a weight of 5.5 g is placed on the central portion of the hole from above the reinforcing member 54, and the amount of deformation of the reinforcing member 54 in the downward direction at the central portion of the hole is measured by a laser displacement meter. (Measured by KEYENCE LK-G85) from below the plate.
- the deformation amount of the reinforcing member 54 is preferably 3 mm or less, preferably 1 mm or less. Is more preferable.
- the reinforcing member 54 only needs to be higher in rigidity than at least the porous film 46, and may be made of a material that hardly affects cell culture.
- materials that hardly affect cell culture include polyethylene terephthalate, silicone materials such as PDMS (polydimethylsiloxane), polystyrene, PEN (polyethylene naphthalate), polypropylene, COP (cycloolefin polymer), PE ( Polyethylene).
- the required thickness of the reinforcing member 54 is also appropriately determined depending on the material of the reinforcing member 54.
- a plurality (eight in this embodiment) of bolt holes 56 are formed at positions corresponding to the bolt holes 32 of the second flow path member 14 in the reinforcing member 54. Are joined to the holding plate 30 and the second flow path member 14 by bolts 40.
- through holes 57 are formed at positions corresponding to the inlet 20A and the outlet 20B of the second microchannel 20 in the reinforcing member 54, respectively.
- a slit 58 is formed in the reinforcing member 54 at a portion where the porous film 46 faces the first microchannel 18 and the second microchannel 20. Specifically, as shown in FIG. 3, the slit 58 is provided at a position that overlaps the channel portion 18C of the first microchannel 18 and the channel portion 20C of the second microchannel 20 in plan view.
- the width of the slit 58 is substantially the same as the width of the channel portion 18C of the first microchannel 18.
- the width of the slit 58 may be at least equal to or smaller than the width of the channel portion 18C of the first microchannel 18.
- the step portion 22 is formed at the joining portion of the first microchannel 18 and the second microchannel 20, and the channel portion 18C of the first microchannel 18 and the second microchannel 18
- a step portion 24 is formed by the difference in the width of the flow path portion 20 ⁇ / b> C of the path 20.
- the portions of the porous film 46 facing the step portions 22 and 24 are reinforced by being covered with the reinforcing member 54.
- the reinforcing member 54 can suppress the porous film 46 from being bent toward the second microchannel 20 side. Thereby, it can suppress that a clearance gap produces between the step parts 22 and 24 and the porous membrane 46, and can suppress that a cell flows into this clearance gap.
- the porous film is compared with a configuration in which the reinforcing member 54 is sized to cover only a part of the porous film 46. 46 can be further reinforced.
- a slit 58 is formed in the reinforcing member 54 at a portion where the porous film 46 faces the first microchannel 18 and the second microchannel 20. For this reason, for example, when conducting a permeability test of cells, red blood cells, or a tracer, the gap between the first microchannel 18 and the second microchannel 20 via the slit 58 and the porous film 46 of the reinforcing member 54 is used. The cell, red blood cell, or tracer can move, and the movement of the cell, red blood cell, or tracer can be prevented from being inhibited by the reinforcing member 54.
- the width of the slit 58 of the reinforcing member 54 is substantially the same as the width of the flow path portion 18C of the first micro flow path 18. For this reason, compared with the case where the width
- the reinforcing member 54 is a membrane member made of polyethylene terephthalate or the like having biocompatibility. For this reason, it can suppress that the component contained in the reinforcement member 54 affects the cell etc. in the 1st microchannel 18 or the 2nd microchannel 20.
- the thickness of the reinforcing member 54 is 12 ⁇ m or more, and is thinner than the depth of the first microchannel 18 or the second microchannel 20. For this reason, the rigidity of the reinforcing member 54 can be increased as compared with the configuration in which the thickness of the reinforcing member 54 is less than 12 ⁇ m, and the porous film 46 can be reinforced more strongly by the reinforcing member 54.
- the cell suspension is added to the first microchannel 18 or the second microchannel 20.
- the cell layer is formed on the surface of the porous membrane 46 by flowing the gas, it is possible to suppress inhibition of the seeding of cells on the porous membrane 46 by the reinforcing member 54.
- the microchannel device 60 of the present embodiment is similar to the microchannel device 10 of the first embodiment in that the first channel member 62 in which the first microchannel 68 is formed and the first channel member 62 are formed. And a second flow path member 64 in which two micro flow paths 70 are formed.
- the first micro flow path 68 and the second micro flow path 70 are partitioned by the porous film 46. Similarly to the first embodiment, the inlets 68A and 70A, the outlets 68B and 70B, and the inlets 68A and 70A The flow outlets 68B and 70B communicate with each other and have flow path portions 68C and 70C that extend substantially linearly, respectively.
- the inlet 68A and the outlet 68B of the first microchannel 68 are provided at positions separated from the inlet 70A and the outlet 70B of the second microchannel 70 in plan view. Further, the channel portion 68C of the first microchannel 68 is provided at a position overlapping the channel portion 70C of the second microchannel 70 in plan view.
- the merged portion of the first microchannel 68 and the second microchannel 70 that is, between the inlets 68A and 70A and the channel portions 68C and 70C, and the outlets 68B and 70B and the channel portion 68C, Step portions 72 are respectively formed between 70C and 70C.
- the width of the channel portion 68C of the first microchannel 68 and the width of the channel portion 70C of the second microchannel 70 are substantially the same size.
- a pair of reinforcing members 74 having higher rigidity than the porous film 46 are disposed between the porous film 46 and the facing surface 64A of the second flow path member 64.
- the pair of reinforcing members 74 is, for example, a rectangular film member made of polyethylene terephthalate or the like, and the thickness of the pair of reinforcing members 74 is 12 ⁇ m or more, and the first microchannel 18 and the second microstream It is thinner than the depth of the path 20.
- the pair of reinforcing members 74 are sized to cover portions of the porous film 46 facing the stepped portion 72 formed between the first microchannel 68 and the second microchannel 70. Further, the pair of reinforcing members 74 are arranged with a space therebetween, and the channel portion 68C of the first microchannel 68 and the channel portion 70C of the second microchannel 70 are disposed between the pair of reinforcing members 74. positioned.
- the stepped portion 72 is formed at the joining portion of the first microchannel 68 and the second microchannel 70, and the portion facing the stepped portion 72 of the porous membrane 46 is a pair of reinforcements.
- Each member 74 is reinforced by being covered.
- the reinforcing member 74 can suppress the porous film 46 from being bent toward the second microchannel 70 side. Thereby, it can suppress that a clearance gap produces between the step part 72 and the porous membrane 46, and can suppress that a cell, a red blood cell, or a tracer flows into this clearance gap.
- the pair of reinforcing members 74 are disposed with a space therebetween, and the channel portion 68C of the first microchannel 68 and the second microchannel are interposed between the pair of reinforcing members 74. 70 channel portions 70C are located. For this reason, for example, when performing a permeability test of cells, red blood cells, or tracers, the movement of the cells, red blood cells, or tracers between the first micro flow path 68 and the second micro flow path 70 is caused by the reinforcing member 74. Inhibition can be suppressed.
- the reinforcing members 54 and 74 are provided between the porous film 46 and the opposed surfaces 14A and 64A of the second flow path members 14 and 64, but the reinforcing members 54 and 74 are
- the first flow path members 12 and 62 may be provided between the facing surfaces 12A and 62A and the porous film 46.
- the holding plate 30 is provided above the first flow path members 12 and 62, and the holding plate 30 and the second flow path members 14 and 64 are joined by the bolts 40. .
- the holding plate 30 may not be provided, and the first flow path members 12 and 62 and the second flow path members 14 and 64 are joined to each other by adhesion, welding, adsorption (self-adsorption), or the like. Also good.
- a membrane member made of polycarbonate having pores arranged in a honeycomb shape was prepared as a porous membrane.
- the porous membrane was coated with collagen, sterilized paper was pasted on both sides of the porous membrane.
- the sterilized paper on the lower surface of the porous film is peeled off with tweezers, the porous film is placed on the second flow path member on which the second micro flow path is formed, and the porous film and the second flow path member are joined. did.
- the sterilized paper on the upper surface of the porous film is peeled off with tweezers, the first flow path member and the second flow path member are aligned while confirming the microscope, and the first flow path member in which the first micro flow path is formed was placed on the porous membrane to join the porous membrane and the first flow path member.
- a holding plate was placed on top of the first flow path member, and the holding plate and the second flow path member were tightened with bolts and nuts via a spacer, thereby producing a basic micro flow path device.
- the width and depth of the first microchannel of the microchannel device are 200 ⁇ m, and the width and depth of the second microchannel are 400 ⁇ m.
- Example 1 a microchannel device having the same configuration as that of the first embodiment described above was manufactured. Specifically, a microchannel device is produced in which a membrane member made of polypropylene having a slit formed in the center as a reinforcing member is sandwiched between the porous membrane of the microchannel device as a base and the second channel member. did.
- the size of the reinforcing member is substantially the same as the opposing surface (main surface) of the second flow path member, the thickness of the reinforcing member is 100 ⁇ m, and the rigidity of the reinforcing member is the above steel ball.
- the deformation amount is 0.5 mm by the evaluation method used.
- Example 2 a microchannel device having the same configuration as that of the second embodiment described above was manufactured. Specifically, a microchannel device in which a pair of membrane members made of polyethylene terephthalate as a reinforcing member was sandwiched between the porous membrane of the microchannel device as a base and the second channel member was produced. The size of the reinforcing member is 3 mm square, the thickness of the reinforcing member is 12 ⁇ m, and the rigidity of the reinforcing member is 1 mm by the evaluation method using the steel balls described above. ing. In addition, the reinforcing member is disposed at the joining portion of the first microchannel and the second microchannel.
- Comparative Example 1 In Comparative Example 1, the reinforcing member was not disposed, and the microchannel device as a base was used as it was.
- Comparative Example 2 In Comparative Example 2, a microchannel device in which a pair of membrane members made of polyethylene terephthalate as a reinforcing member was sandwiched between the porous membrane of the microchannel device serving as a base and the second channel member was produced.
- the size of the reinforcing members is 3 mm square, and the thickness of the reinforcing members is 2 ⁇ m.
- the reinforcing member is disposed at the joining portion of the first microchannel and the second microchannel.
- a suspension of iPS cell-derived vascular endothelial cells (CDI iCell EC) stained with CellTracker Orange (ThermoFischer) was prepared at a concentration of 1 ⁇ 10 6 cells / ml, and 200 ⁇ L of the suspension was Injection into the first microchannel.
- Example 1 the distribution of iPS cell-derived vascular endothelial cells injected into the first microchannel was observed using a fluorescence microscope, respectively. did.
- FIGS. 10A and 10B The observation results of Example 1 are shown in FIGS. 10A and 10B, and the observation results of Comparative Example 1 are shown in FIGS. 11A and 11B.
- FIGS. 10A, 10B, 11A, and 11B only iPS cell-derived vascular endothelial cells are illustrated.
- Example 1 As shown in FIGS. 10A and 10B, it was confirmed that iPS cell-derived vascular endothelial cells S remained in the first microchannel.
- Comparative Example 1 As shown in FIGS. 11A and 11B, a part of iPS cell-derived vascular endothelial cell S is located in the second microchannel, so that it is as if iPS cell-derived vascular endothelial cell. It was confirmed that S seemed to leak into the second microchannel.
- Example 2 iPS cell-derived vascular endothelial cells S remained in the first microchannel, whereas in Comparative Example 2, a part of iPS cell-derived vascular endothelial cells S was present. It was confirmed that the iPS cell-derived vascular endothelial cells S located in the second microchannel seemed to leak into the second microchannel.
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Abstract
Description
以下、本開示の第1実施形態について図1~7を用いて説明する。なお、以下の実施形態は本開示を例示するものであり、本開示の範囲を制限するものではない。また、各構成の説明を容易にするため、図中の各構成の寸法を適宜変更している。このため、図中の縮尺は実際とは異なっている。
図1に示すように、本実施形態のマイクロ流路デバイス10は、厚さ方向に積層された第1流路部材12と第2流路部材14とで構成された流路ユニット16を有している。第1流路部材12は、一例としてPDMS(ポリジメチルシロキサン)等の弾性を有する透明な材料で構成されており、第2流路部材14は、一例としてCOP(シクロオレフィンポリマー)等の剛性を有する透明な材料で構成されていることが好ましい。
第1流路部材12及び第2流路部材14の対向面12A、14A間には、多孔膜46が配置されている。多孔膜46は、一例として疎水性の有機溶媒に溶解可能な疎水性ポリマーから成る。なお、疎水性の有機溶媒は、25℃の水に対する溶解度が10(g/100g水)以下の液体である。
図1~図5に示すように、多孔膜46と第2流路部材14の対向面14Aとの間には、多孔膜46より剛性が高い補強部材54が配置されている。補強部材54は、一例として、ポリエチレンテレフタレートから成る膜部材とされており、多孔膜46全体を覆う大きさとされている。具体的には、補強部材54は、第2流路部材14の対向面14Aと略同じ大きさとされており、多孔膜46における第1マイクロ流路18と第2マイクロ流路20との間に形成された段部22、24に面する部分を覆っている。
本実施形態によれば、第1マイクロ流路18と第2マイクロ流路20との合流部分に段部22が形成されており、第1マイクロ流路18の流路部18Cと第2マイクロ流路20の流路部20Cの幅の差によって段部24が形成されている。また、多孔膜46の段部22、24に面する部分が、補強部材54によって覆われることによって補強されている。
次に、本開示の第2実施形態について図8、図9を用いて説明する。なお、各構成の説明を容易にするため、図中の各構成の寸法を適宜変更している。このため、図中の縮尺は実際とは異なっている。また、第1実施形態と同様の構成については同じ符号を付して説明を省略する。
本実施形態によれば、第1マイクロ流路68と第2マイクロ流路70との合流部分に段部72が形成されており、多孔膜46の段部72に面する部分が、一対の補強部材74によってそれぞれ覆われることによって補強されている。
以上、本開示の実施形態の一例について説明したが、本開示は、上記に限定されるものでなく、上記以外にも、その主旨を逸脱しない範囲内において種々変形して実施可能である。
まず、多孔膜として、孔がハニカム状に配置されたポリカーボネートから成る膜部材を準備し、多孔膜をコラーゲンで被覆した後、多孔膜の両面に滅菌紙を貼り付けた。次に、多孔膜の下面の滅菌紙をピンセットによって剥がし、第2マイクロ流路が形成された第2流路部材の上に多孔膜を載置して多孔膜と第2流路部材とを接合した。
実施例1では、上述した第1実施形態と同様の構成のマイクロ流路デバイスを作製した。具体的には、基となるマイクロ流路デバイスの多孔膜と第2流路部材との間に、補強部材として中央部にスリットを形成したポリプロピレンから成る膜部材を挟み込んだマイクロ流路デバイスを作製した。なお、補強部材の大きさは第2流路部材の対向面(主面)と略同じ大きさとされており、補強部材の厚さは100μmとされ、補強部材の剛性は、前述の鋼球を用いた評価方法にて変形量が0.5mmとされている。
実施例2では、上述した第2実施形態と同様の構成のマイクロ流路デバイスを作製した。具体的には、基となるマイクロ流路デバイスの多孔膜と第2流路部材との間に、補強部材としてポリエチレンテレフタレートから成る一対の膜部材を挟み込んだマイクロ流路デバイスを作製した。なお、補強部材の大きさはそれぞれ3mm四方とされており、補強部材の厚さはそれぞれ12μmとされ、補強部材の剛性は、前述の鋼球を用いた評価方法にて変形量が1mmとされている。また、補強部材は、第1マイクロ流路と第2マイクロ流路の合流部分にそれぞれ配置されている。
比較例1では、補強部材を配置せず、基となるマイクロ流路デバイスをそのまま用いた。
比較例2では、基となるマイクロ流路デバイスの多孔膜と第2流路部材との間に、補強部材としてポリエチレンテレフタレートから成る一対の膜部材を挟み込んだマイクロ流路デバイスを作製した。なお、補強部材の大きさはそれぞれ3mm四方とされており、補強部材の厚さはそれぞれ2μmとされている。また、補強部材は、第1マイクロ流路と第2マイクロ流路の合流部分にそれぞれ配置されている。
上記の実施例1、実施例2、比較例1、及び比較例2のマイクロ流路デバイスの多孔膜に細胞を播種し、その細胞を観察した。具体的には、まず、骨髄由来間葉系幹細胞(Lonza社)の懸濁液を濃度3×106cells/mlで調整し、200μLの懸濁液を下側の第2マイクロ流路に注入した。次に、マイクロ流路デバイスを反転し、CO2インキュベータ内において37℃で3時間静置した後、毎分0.7μLの速度で培地を流し、一晩培養した。
12、62 第1流路部材
12A、62A 対向面
14、64 第2流路部材
14A、64A 対向面
16 流路ユニット
18、68 第1マイクロ流路
18A、68A 流入口
18B、68B 流出口
18C、68C 流路部
20、70 第2マイクロ流路
20A、70A 流入口
20B、70B 流出口
20C、70C 流路部
22、24、72 段部
26A、26B、28A、28B 貫通孔
30 保持プレート
32、56 ボルト孔
34 凹部
36 スペーサ
38 ナット
40 ボルト
42A、42B、44A、44B 貫通孔
46 多孔膜
46A 上面
46B 下面
48 孔
48A 開口
50 平坦部
52 連通孔
54、74 補強部材
57 貫通孔
58 スリット
Claims (9)
- 第1流路部材に形成された第1マイクロ流路と、
第2流路部材に形成され、平面視で少なくとも一部が前記第1マイクロ流路に重なり、かつ、前記第1マイクロ流路との間に段部が形成された第2マイクロ流路と、
厚さ方向に貫通する複数の孔を有し、前記第1流路部材と前記第2流路部材の間に配置されて前記第1マイクロ流路と前記第2マイクロ流路を仕切る多孔膜と、
前記第1流路部材又は前記第2流路部材と前記多孔膜との間に設けられ、前記多孔膜より剛性が高く、前記多孔膜の少なくとも前記段部に面する部分を補強する補強部材と、
を有するマイクロ流路デバイス。 - 前記第1マイクロ流路と前記第2マイクロ流路は平面視で一部が離間しており、
前記段部は、前記第1マイクロ流路と前記第2マイクロ流路が平面視で合流する合流部分に形成されている、
請求項1に記載のマイクロ流路デバイス。 - 前記第1マイクロ流路の幅は前記第2マイクロ流路の幅より狭く、
前記段部は、前記第1マイクロ流路と前記第2マイクロ流路の幅の差によって形成されている、
請求項1に記載のマイクロ流路デバイス。 - 前記補強部材は、前記多孔膜全体を覆う大きさとされており、
前記多孔膜が前記第1マイクロ流路又は前記第2マイクロ流路に面する部分において、前記補強部材にはスリットが形成されている、
請求項1~請求項3のいずれか1項に記載のマイクロ流路デバイス。 - 前記補強部材の前記スリットの幅は、前記第1マイクロ流路及び前記第2マイクロ流路の幅以下とされている、請求項4に記載のマイクロ流路デバイス。
- 前記補強部材は、ポリエチレンテレフタレートから成る膜部材である、請求項1~請求項5のいずれか1項に記載のマイクロ流路デバイス。
- 前記補強部材は、ポリプロピレンから成る膜部材である、請求項1~請求項5のいずれか1項に記載のマイクロ流路デバイス。
- 前記補強部材の厚さは12μm以上とされている、請求項1~請求項7のいずれか1項に記載のマイクロ流路デバイス。
- 前記補強部材の厚さは、前記第1マイクロ流路及び前記第2マイクロ流路の深さより薄くされている、請求項1~請求項8のいずれか1項に記載のマイクロ流路デバイス。
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JP2020503624A JP7011034B2 (ja) | 2018-03-02 | 2019-02-28 | マイクロ流路デバイス |
EP19760112.3A EP3744678A4 (en) | 2018-03-02 | 2019-02-28 | MICROFLUIDIC CHANNEL DEVICE |
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TW201938263A (zh) | 2019-10-01 |
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