WO2020079767A1 - 生化学用カートリッジ及び生化学分析装置 - Google Patents
生化学用カートリッジ及び生化学分析装置 Download PDFInfo
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- WO2020079767A1 WO2020079767A1 PCT/JP2018/038591 JP2018038591W WO2020079767A1 WO 2020079767 A1 WO2020079767 A1 WO 2020079767A1 JP 2018038591 W JP2018038591 W JP 2018038591W WO 2020079767 A1 WO2020079767 A1 WO 2020079767A1
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/447—Systems using electrophoresis
- G01N27/44756—Apparatus specially adapted therefor
- G01N27/44791—Microapparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/08—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor using a stream of discrete samples flowing along a tube system, e.g. flow injection analysis
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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
- B01L3/502715—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 interfacing components, e.g. fluidic, electrical, optical or mechanical interfaces
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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
- B01L3/502769—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 multiphase flow arrangements
- B01L3/502784—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 multiphase flow arrangements specially adapted for droplet or plug flow, e.g. digital microfluidics
- B01L3/502792—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 multiphase flow arrangements specially adapted for droplet or plug flow, e.g. digital microfluidics for moving individual droplets on a plate, e.g. by locally altering surface tension
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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
- B01L7/00—Heating or cooling apparatus; Heat insulating devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
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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
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/02—Adapting objects or devices to another
- B01L2200/025—Align devices or objects to ensure defined positions relative to each other
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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
- B01L2200/026—Fluid interfacing between devices or objects, e.g. connectors, inlet details
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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
- B01L2200/026—Fluid interfacing between devices or objects, e.g. connectors, inlet details
- B01L2200/027—Fluid interfacing between devices or objects, e.g. connectors, inlet details for microfluidic devices
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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
- B01L2200/04—Exchange or ejection of cartridges, containers or reservoirs
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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
- B01L2200/16—Reagents, handling or storing thereof
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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
- B01L2300/04—Closures and closing means
- B01L2300/041—Connecting closures to device or container
- B01L2300/044—Connecting closures to device or container pierceable, e.g. films, membranes
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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
- B01L2300/04—Closures and closing means
- B01L2300/046—Function or devices integrated in the closure
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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
- B01L2300/0832—Geometry, shape and general structure cylindrical, tube shaped
- B01L2300/0838—Capillaries
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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
- B01L2300/0861—Configuration of multiple channels and/or chambers in a single devices
- B01L2300/0867—Multiple inlets and one sample wells, e.g. mixing, dilution
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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
- B01L2300/18—Means for temperature control
- B01L2300/1894—Cooling means; Cryo cooling
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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
- B01L2400/00—Moving or stopping fluids
- B01L2400/04—Moving fluids with specific forces or mechanical means
- B01L2400/0403—Moving fluids with specific forces or mechanical means specific forces
- B01L2400/0415—Moving fluids with specific forces or mechanical means specific forces electrical forces, e.g. electrokinetic
- B01L2400/0427—Electrowetting
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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
- B01L7/00—Heating or cooling apparatus; Heat insulating devices
- B01L7/52—Heating or cooling apparatus; Heat insulating devices with provision for submitting samples to a predetermined sequence of different temperatures, e.g. for treating nucleic acid samples
- B01L7/525—Heating or cooling apparatus; Heat insulating devices with provision for submitting samples to a predetermined sequence of different temperatures, e.g. for treating nucleic acid samples with physical movement of samples between temperature zones
Definitions
- the present invention relates to a biochemical cartridge used for synthesizing and analyzing a biological sample extracted by a biochemical reaction as necessary, and a biochemical analyzer using the biochemical cartridge.
- Genome analysis such as base sequence analysis and polymorphism analysis is very important in biological research fields, medical fields such as gene therapy and diagnosis, development of molecular targeted drugs, and forensic fields such as DNA testing.
- a step of extracting a nucleic acid from a sample 2) a step of amplifying the extracted nucleic acid and adding a label, and 3) an electrophoresis step of reading the base sequence of the nucleic acid are performed.
- the nucleic acid mixed with the reagent is kept at a predetermined temperature, so that the primer anneals the target nucleic acid and the nucleic acid is amplified.
- Patent Document 1 discloses that electrowetting (EWOD; Electro Wetting On Dielectric) technology is used in step 2). That is, Patent Document 1 discloses that a droplet of a nucleic acid or a reagent is conveyed by using EWOD in a droplet microactuator, the nucleic acid is amplified, and then analyzed by an electrophoresis method on the downstream side. .
- EWOD Electro Wetting On Dielectric
- Patent Document 1 does not disclose a specific method for supplying the amplified nucleic acid to a biochemical analyzer such as a capillary sequencer.
- a biochemical analyzer such as a capillary sequencer.
- EWOD electrowetting-on-dielectric
- droplets are transported with an applied voltage of several tens of V, whereas in order to take in a biological sample in droplets, such as nucleic acid, into a capillary array of a capillary sequencer, an applied voltage of several kV is required. Etc. are destroyed and the EWOD cannot be reused for the movement of the droplet.
- an object of the present invention is to provide a biochemical cartridge that can be used a plurality of times for capturing a biological sample by a capillary array or the like, and a biochemical analyzer that uses the biochemical cartridge.
- the biochemical cartridge of the present invention has a channel for transporting a sample, and is disposed on the channel along the direction in which the sample is transported, and for transporting the sample. It is characterized in that it is provided with a plurality of electrodes provided and an opening provided so as to face the plurality of electrodes arranged on the downstream side of the flow path.
- the biochemical analyzer of the present invention is provided with a capillary, a flow path through which a sample is carried, a flow path along which the sample is carried, and a flow path through which the sample is carried along the flow path.
- biochemical cartridge which can be used a plurality of times for taking in a biological sample by a capillary array and a biochemical analyzer using the biochemical cartridge.
- FIG. 1 is a diagram showing an overall configuration of a biochemical analyzer of Example 1.
- FIG. 3 is a perspective view illustrating a biochemical cartridge of Example 1.
- 5 is a plan view illustrating a sample flow path, a reagent flow path, and a liquid droplet holding unit in the biochemistry cartridge of Example 1.
- FIG. 3 is a cross-sectional view illustrating an EWOD (Electro Wetting On Dielectric) of Example 1.
- FIG. 4 is a cross-sectional view illustrating a droplet holding unit of Example 1.
- FIG. 7 is a cross-sectional view illustrating a droplet holding unit of Example 2.
- FIG. 9 is a cross-sectional view illustrating a droplet holding unit of Example 3. It is sectional drawing explaining the septa in which the slit of Example 3 was provided.
- FIG. 1 shows the overall configuration of the biochemical analyzer.
- the biochemical analysis device of the present invention exemplifies a device for amplifying a nucleic acid extracted from a sample, adding a label, and then performing electrophoresis for reading the base sequence of the nucleic acid.
- the nucleic acid mixed with a reagent is kept at a predetermined temperature in order to amplify the nucleic acid, or the amplified nucleic acid is supplied to a capillary called a capillary for carrying out electrophoresis.
- the device body 101 and the control computer 125 are connected by a communication cable.
- the control computer 125 receives an input from an operator, controls each function of the biochemical analysis device, transmits / receives data detected by the device main body 101, and displays the transmitted / received data.
- the apparatus main body 101 includes a capillary array 114, a pump mechanism 103, a constant temperature bath 115, a carrier 122, a high voltage power supply 104, a light source 111, and an optical detector 112.
- a capillary array 114 includes a capillary array 114, a pump mechanism 103, a constant temperature bath 115, a carrier 122, a high voltage power supply 104, a light source 111, and an optical detector 112.
- the capillary array 114 is a replacement member including one or a plurality of capillaries 102 (for example, 2 to 96), and includes a load header 124, a detection unit 113, and a capillary head 129.
- a load header 124 for supplying a sample into the capillary 102 is provided at one end of the capillary array 114, and forms a cathode end 126 to which a negative voltage is applied.
- a plurality of capillaries 102 are bundled into one by a capillary head 129, and are connected to the gel block 106 by a pressure-proof airtight structure.
- a detection unit 113 that is irradiated with laser light is provided between the load header 124 and the capillary head 129.
- the capillary 102 is a glass tube having an inner diameter of several tens to several hundreds ⁇ m and an outer diameter of several hundreds ⁇ m.
- its surface is covered with a polyimide coating.
- the polyimide coating is removed from the detector 113 irradiated with the laser light and its vicinity.
- the inside of the capillary 102 is filled with a separation medium for separating the DNA molecules in the sample.
- the separation medium is, for example, a polyacrylamide-based separation gel.
- the pump mechanism 103 is composed of a syringe 105 and a mechanism system for pressurizing the syringe 105.
- the gel block 106 is a connecting portion that connects the syringe 105, the capillary array 114, the anode buffer container 108, and the separation medium container 107. By closing the electric valve 110 and pushing the syringe 105, the separation medium in the syringe 105 is injected into the capillary 102.
- the constant temperature bath 115 has a heater 117 and a fan 116 for controlling the temperature of the capillary array 114, and is covered with a heat insulating material to keep the temperature inside the constant temperature bath 115 constant.
- a constant temperature such as 60 ° C.
- the carrier 122 includes three electric motors and a linear actuator, and can move in three axial directions: up, down, left, right, and front. Further, at least one container is mounted on the moving stage 123 on the carrier 122.
- the carrier 122 carries each of the buffer container 118, the cleaning container 119, the waste liquid container 120, and the biochemical cartridge 121 on the moving stage 123 to the cathode end 126 of the capillary 102.
- Electrophoresis buffer solution enters the buffer container 118.
- the cleaning container 119 is used for cleaning the capillary 102.
- the separation medium in the capillary 102 is discharged to the waste liquid container 120.
- the biochemical cartridge 121 contains a biological sample, for example, nucleic acid and reagent, and the nucleic acid amplified in the biochemical cartridge 121 is taken into the capillary array 114 from the cathode end 126 of the capillary 102.
- the biochemical cartridge 121 will be described later with reference to FIGS.
- the high-voltage power supply 104 is connected to the anode electrode 109 inside the anode buffer container 108 and the load header 124, and applies a high voltage to the separation medium inside the capillary 102.
- the light source 111 irradiates the detection unit 113 with laser light that is coherent light as excitation light.
- the optical detector 112 optically detects the fluorescence emitted by the sample in the detection unit 113.
- the detected optical data 128 is transferred to the control computer 125 via the control board 127.
- FIG. 2 is a perspective view of the biochemical cartridge 121.
- the biochemical cartridge 121 is provided with one or more, for example, four channels for amplifying nucleic acids, and the cathode end 126 of the capillary 102 is inserted into each channel.
- the longitudinal direction of the flow path is shown as the X direction
- the direction in which the flow paths are arranged is the Y direction
- the direction in which the cathode end 126 is inserted is shown as the Z direction.
- FIG. 3 is a plan view of the inside of the biochemical cartridge 121.
- a sample tank 301, a reagent tank 302, a sample channel 303, and a reagent channel 304 are provided in the biochemistry cartridge 121 of FIG.
- a plurality of, for example, four sample tanks 301 are provided, and a sample containing a biological sample, for example, 1 ⁇ L is placed in each sample tank 301.
- 10 ⁇ L of sample may be put in the sample tank 301, and 1 ⁇ L may be separated from 10 ⁇ L and used.
- each reagent tank 302 contains reagents used for nucleic acid amplification, such as primer, dNTP, buffer solution, water, enzyme, denaturant, and size standard. DNA etc. can be inserted.
- reagents used for nucleic acid amplification such as primer, dNTP, buffer solution, water, enzyme, denaturant, and size standard. DNA etc. can be inserted.
- the sample channel 303 is connected to each sample tank 301, and droplets containing nucleic acid are conveyed.
- the direction in which the droplet containing the nucleic acid is conveyed is the X direction.
- the sample channel 303 is a channel having the EWOD electrode 300 for transporting the droplet.
- the EWOD is a surface of a droplet that is formed by applying a voltage between a droplet arranged on a water-repellent film which is a water-repellent film and an EWOD electrode which is an electrode provided under the water-repellent film. This is a technique for transporting droplets by controlling the tension.
- FIG. 4 is an XZ sectional view of a flow path using EWOD.
- the flow path using EWOD has an upper plate 401, an upper electrode 402, an upper water repellent film 403, a lower water repellent film 405, an insulating film 406, an EWOD electrode 300, and a lower plate 407.
- the upper plate 401 and the lower plate 407 are arranged in parallel, the upper electrode 402 and the upper water-repellent film 403 are provided on the lower surface of the upper plate 401, and the plurality of EWOD electrodes 300 and the insulating film 406 are provided on the upper surface of the lower plate 407.
- a side water-repellent film 405 is provided. If a plurality of EWOD electrodes 300 are arranged on at least one of the upper plate 401 and the lower plate 407, the droplet 400 can be transported.
- the plurality of EWOD electrodes 300 are arranged along the direction in which the droplet 400 is transported.
- the EWOD electrode 300 is covered with an insulating film 406 having a thickness of, for example, several hundreds of ⁇ m so that a voltage can be applied individually to each EWOD electrode 300.
- the space between the upper water-repellent film 403 and the lower water-repellent film 405 is filled with a fluid 404 that does not mix with the transported droplet 400. Note that the droplet 400 can be transported even if the droplet 400 is not filled with the fluid 404.
- the reagent channel 304 is connected to each reagent tank 302, and the droplet of the reagent is conveyed.
- the direction in which the reagent droplets are transported is the Y direction.
- the reagent channel 304 has a plurality of EWOD electrodes 300, similarly to the sample channel 303.
- the reagent channel 304 intersects with the sample channel 303, and the droplet of the reagent is mixed with the droplet containing the nucleic acid at the intersection of the two.
- the angle at which the reagent channel 304 and the sample channel 303 intersect is not limited to 90 degrees as shown in FIG.
- the direction in which the droplets are transported is not limited to one direction, and the droplets may be reciprocated.
- the mixing of the nucleic acid and the reagent may be promoted by reciprocating the droplet between the intersection of the sample flow channel 303 and the reagent flow channel 304 and a point adjacent to the intersection.
- a temperature control area 305 is provided in the middle of the sample flow path 303.
- the temperature control region 305 is one or more regions maintained at a predetermined temperature, for example, a region maintained at 60 ° C. and a region maintained at 95 ° C.
- the droplet in which the nucleic acid and the reagent are mixed is conveyed to the temperature control region 305, and the nucleic acid is amplified by, for example, PCR (Polymerase Chain Reaction) or cycle sequence reaction.
- the droplets may be reciprocated between regions maintained at different temperatures, for example, a region of 60 ° C and a region of 95 ° C.
- the droplet in which the nucleic acid is amplified is added with a label to become a sample droplet.
- a droplet holding unit 306 is provided at the tip of the sample channel 303.
- the droplet holding unit 306 has a plurality of, for example, 10 sample injection points.
- Each sample injection point includes the EWOD electrode 300, and by controlling the voltage applied to the EWOD electrode 300, the sample droplet is transported to the position of the desired sample injection point, and the sample droplet is held at that position. It It is preferable that the distance between the EWOD electrodes 300 of the droplet holding unit 306 is the same as the distance between the EWOD electrodes 300 of the sample flow path 303 and the reagent flow path 304. The same spacing facilitates the manufacture of the EWOD electrode 300.
- the droplet holding unit 306 of this embodiment will be described with reference to FIG.
- FIG. 5 is an XZ sectional view of the droplet holding unit 306.
- the droplet holding unit 306 includes a septa 500, an upper plate 401, an upper electrode 402, an upper water repellent film 403, a lower water repellent film 405, an insulating film 406, an EWOD electrode 300, and a lower plate 407.
- the lower water-repellent film 405, the insulating film 406, the EWOD electrode 300, and the lower plate 407 have the same configurations as those shown in FIG.
- the upper plate 401, the upper electrode 402, and the upper water-repellent film 403 have the same configuration as that shown in FIG. 4 except that they have an opening 501.
- the opening 501 is opened along the Z direction at a position where each EWOD electrode 300 of the droplet holding unit 306 is arranged. That is, the EWOD electrodes 300 and the openings 501 of the droplet holding unit 306 are the same number.
- the septa 500 is a rubber member arranged so as to cover the upper surface of the upper plate 401, and has a hole into which the cathode end 126 of the capillary 102 is inserted.
- the portion of the septa 500 having a hole is inserted into each opening 501. That is, one sample injection point includes one EWOD electrode 300 of the liquid droplet holding unit 306, an opening 501 opened above the EWOD electrode 300, and a hole included in the septa 500 inserted therein.
- FIG. 5 illustrates a state in which the cathode end 126 is brought into contact with the sample droplet 502 assigned with the number 1.
- a voltage of several kV is applied to the load header 124 for a short time, so that the nucleic acid in the sample droplet 502 is taken into the capillary array 114.
- the nucleic acid taken into the capillary array 114 is guided to the detection unit 113, where it is irradiated with excitation light and fluorescence is detected.
- the insulating film 406 and the EWOD electrode 300 are destroyed by the applied voltage of several kV and cannot be reused. Therefore, in this embodiment, a plurality of sample injection points are provided, and the sample injection point used for nucleic acid uptake is changed every time nucleic acid is uptaken. That is, the droplet holding unit 306 of this embodiment has a plurality of EWOD electrodes 300 for holding the sample droplets 502, and each time the nucleic acid in the sample droplets 502 is taken into the capillary array 114, a different EWOD electrode 300 is used. . According to this example, EWOD can be used a plurality of times for uptake of nucleic acid by the capillary array 114.
- the capillary array 114 it is preferable to use the capillary array 114 to take in the nucleic acid in order from the EWOD electrode 300 at the end, for example, in the order of the numbers given to the sample droplets 502 in FIG.
- the EWOD electrodes 300 included in the droplet holding unit 306 can be used without exhaustion.
- nucleic acid particularly DNA
- DNA is handled as an example of the biological sample
- biological sample handled in the present invention is not limited to this, and biological materials such as RNA, protein, polysaccharides and microorganisms in general can be used.
- a device other than the capillary 102 may be used to take in the biological sample.
- the gap between the openings 501 into which the cathode ends 126 of the capillaries 102 are inserted is the same as the gap between the EWOD electrodes 300 of the droplet holding unit 306. If the distance between the EWOD electrodes 300 of the droplet holding unit 306 is too small, the periphery of the EWOD electrodes 300 used for capturing the nucleic acid by the capillary array 114 may be destroyed by the voltage applied to the load header 124.
- FIG. 6 is an XZ sectional view of the droplet holding unit 306.
- the droplet holding unit 306 includes the septa 500, the upper plate 401, the upper electrode 402, the upper water-repellent film 403, the lower water-repellent film 405, the insulating film 406, the EWOD electrode 300, and the lower plate 407, as in the first embodiment.
- An opening 501 is provided in the upper water-repellent film 403.
- the openings 501 of the present embodiment are provided at a wider interval than the EWOD electrode 300, for example, at an interval that does not cause breakdown due to the voltage applied to the load header 124.
- the openings 501 at such intervals, even when the periphery of the EWOD electrode 300 used for taking in the nucleic acid in the sample droplet 502 is destroyed, the opening adjacent to the opening 501 used for taking in the nucleic acid.
- the EWOD electrode 300 under 501 does not have to be destroyed.
- nucleic acid can be taken into the capillary array 114 through the opening 501 on the EWOD electrode 300 which has not been destroyed.
- the EWOD electrode 300 used for taking in the nucleic acid in the sample droplet 502 is destroyed, the EWOD electrode 300 below the opening 501 is not destroyed, so that the EWOD is used for taking in the nucleic acid. Can be used multiple times.
- Example 1 it was explained that the upper plate 401, the upper electrode 402, and the upper water-repellent film 403 have the same number of openings 501 as the number of sample injection points.
- a configuration will be described in which the upper plate 401, the upper electrode 402, and the upper water-repellent film 403 have an opening 701 that is common to all sample injection points.
- FIG. 7 is an XZ cross-sectional view of the droplet holding unit 306, similar to FIG.
- the upper plate 401, the upper electrode 402, and the upper water-repellent film 403 have one opening 701 common to the droplet holding unit 306.
- the septa 500 is arranged so as to close the opening 701.
- the septa 500 has an opening into which the cathode end 126 of the capillary 102 is inserted.
- the openings of the septa may be a plurality of holes 702 facing the individual EWOD electrodes 300 or a slit 703 (see FIG. 8) extending over the plurality of EWOD electrodes 300.
- the common opening 701 allows the biochemical cartridge 121 and the septa 500 to have a simpler configuration.
- biochemical analyzer of the present invention is not limited to the above-mentioned embodiment, and constituent elements can be modified and embodied without departing from the gist of the invention.
- a plurality of constituent elements disclosed in the above embodiments may be combined as appropriate. Further, some constituent elements may be deleted from all the constituent elements shown in the above embodiment.
- Reference numeral 101 device body, 102: capillary, 103: pump mechanism, 104: high-voltage power supply, 105: syringe, 106: gel block, 107: separation medium container, 108: anode buffer container, 109: anode electrode, 110: electric valve, 111: Light source, 112: Optical detector, 113: Detection part, 114: Capillary array, 115: Constant temperature chamber, 116: Fan, 117: Heater, 118: Buffer container, 119: Wash container, 120: Waste liquid container, 121: Biochemical cartridge, 122: carrier, 123: moving stage, 124: load header, 125: control computer, 126: cathode end, 127: control board, 128: optical data, 129: capillary head, 300: EWOD electrode , 301: sample tank, 302: reagent tank, 303: sample channel, 30 : Reagent channel, 305: Temperature control region, 306: Drop holding unit, 400
Abstract
Description
Claims (14)
- サンプルが搬送される流路と、
前記流路上に、サンプルが搬送される方向に沿って配置され、かつ、サンプルを搬送するために設けられた複数の電極と、
前記流路の下流側に配置された複数の電極に対向して設けられる開口を備えることを特徴とする生化学用カートリッジ。 - 請求項1に記載の生化学用カートリッジであって、
前記開口は、流路の下流側に配置された各電極に対向するように、生化学用カートリッジの上面に複数個設けられることを特徴とする生化学用カートリッジ。 - 請求項1に記載の生化学用カートリッジであって、
サンプルの導入は、サンプルの導入毎に、異なる電極に対向する開口を用いて行われることを特徴とする生化学用カートリッジ。 - 請求項1に記載の生化学用カートリッジであって、
サンプルの導入は、流路の末端に設けられた電極から順に用いて行なうことを特徴とする生化学用カートリッジ。 - 請求項1に記載の生化学用カートリッジであって、
前記流路に交差するように、試薬流路が配置されることを特徴とする生化学用カートリッジ。 - 請求項1に記載の生化学用カートリッジであって、
前記開口の間隔が電極の間隔よりも広いことを特徴とする生化学用カートリッジ。 - 請求項1に記載の生化学用カートリッジであって、
前記開口は蓋で覆われていることを特徴とする生化学用カートリッジ。 - 請求項1に記載の生化学用カートリッジであって、
前記開口は、前記流路の下流側に配置された複数の電極をまたがるように設けられ、
前記開口は、蓋で覆われ、
蓋は、孔を有することを特徴とする生化学用カートリッジ。 - 請求項8に記載の生化学用カートリッジであって、
前記孔は、複数設けられることを特徴とする生化学用カートリッジ。 - 請求項1に記載の生化学用カートリッジであって、
前記流路でのサンプルの搬送は、EWOD(Electro Wetting On device)の技術が用いられることを特徴とする生化学用カートリッジ。 - 請求項1に記載の生化学用カートリッジであって、
前記開口には、キャピラリが挿入されることを特徴とする生化学用カートリッジ。 - 生化学用カートリッジを備えた生化学分析装置であって、
キャピラリと、
サンプルが搬送される流路と、
前記流路上に、サンプルが搬送される方向に沿って配置され、かつ、サンプルを搬送するために設けられた複数の第1電極と、
前記流路の下流側に配置された複数の電極に対向した開口と、
流路内のサンプルをキャピラリへ導入するために設けられた第2電極を備えることを特徴とする生化学分析装置。 - 請求項12に記載の生化学分析装置であって、
キャピラリ挿入口に対向する位置の第一電極により液滴が保持され、
第一電極に液滴が保持されているときに開口からキャピラリが挿入され、第二電極により液滴に高電圧が印加されることを特徴とする生化学分析装置。 - 請求項12に記載の生化学分析装置であって、
前記流路を温調するための温調部を有することを特徴とする生化学分析装置。
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DE112018007861.2T DE112018007861T5 (de) | 2018-10-17 | 2018-10-17 | Biochemische Kassette und biochemische Analysevorrichtung |
GB2102910.3A GB2591369B (en) | 2018-10-17 | 2018-10-17 | Biochemical cartridge and biochemical analysis device |
PCT/JP2018/038591 WO2020079767A1 (ja) | 2018-10-17 | 2018-10-17 | 生化学用カートリッジ及び生化学分析装置 |
US17/275,328 US20220048023A1 (en) | 2018-10-17 | 2018-10-17 | Biochemical cartridge and biochemical analysis device |
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