WO2006112498A1 - 検体を分析するための検査チップおよびマイクロ分析システム - Google Patents
検体を分析するための検査チップおよびマイクロ分析システム Download PDFInfo
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- WO2006112498A1 WO2006112498A1 PCT/JP2006/308273 JP2006308273W WO2006112498A1 WO 2006112498 A1 WO2006112498 A1 WO 2006112498A1 JP 2006308273 W JP2006308273 W JP 2006308273W WO 2006112498 A1 WO2006112498 A1 WO 2006112498A1
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- liquid
- reagent
- flow path
- aqueous
- control unit
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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
- B01L3/50273—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 means or forces applied to move the fluids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
- B01F25/4331—Mixers with bended, curved, coiled, wounded mixing tubes or comprising elements for bending the flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/30—Micromixers
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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
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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
- B01L2200/0673—Handling of plugs of fluid surrounded by immiscible fluid
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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
- B01L2200/10—Integrating sample preparation and analysis in single entity, e.g. lab-on-a-chip concept
-
- 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
- B01L2200/14—Process control and prevention of errors
- B01L2200/142—Preventing evaporation
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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
- B01L2300/08—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
- B01L2400/00—Moving or stopping fluids
- B01L2400/04—Moving fluids with specific forces or mechanical means
- B01L2400/0475—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure
- B01L2400/0487—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure fluid pressure, pneumatics
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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
- B01L2400/06—Valves, specific forms thereof
- B01L2400/0688—Valves, specific forms thereof surface tension valves, capillary stop, capillary break
Definitions
- the present invention relates to a test chip for analyzing a target substance in a sample, which is provided with a series of fine flow paths for mixing and reacting a sample and a reaction reagent, and detecting the reaction, and
- the present invention relates to a micro-analysis system using the test chip, and more particularly to improvement of a technique for sealing an aqueous reagent in a reagent container of the test chip.
- Patent Document 1 Japanese Patent Laid-Open No. 2004-28589
- Patent Document 2 Japanese Patent Application Laid-Open No. 2001-32099
- Patent Document 3 Japanese Patent Laid-Open No. 2004-108285
- Patent Document 4 Japanese Unexamined Patent Application Publication No. 2004-270537 Disclosure of the invention
- reagent storage that communicates with the micro-channel formed in the test chip for analysis is performed in order to perform quick analysis and inspection when necessary. It is desirable that a predetermined amount of reagent is sealed in the part in advance.
- the reagent when the reagent is sealed in the test chip in advance, it prevents the reagent from evaporating during storage before use, and leaks the reagent from the reagent container to the external flow path during storage before use. In use, it is required that the reagent can easily flow out from the reagent container to the subsequent flow path.
- the present invention prevents the reagent previously enclosed in the reagent container from being altered by transpiration or the like during storage, or leaking to the external flow path, and further from the reagent container to the subsequent flow path during use. It is an object of the present invention to provide a test chip for analyzing a target substance in a specimen and a microanalysis system using the same.
- the present invention has an object to provide a test chip capable of appropriately supplying a reagent to a subsequent process and a microanalysis system using the test chip.
- the test chip according to the first aspect of the present invention is a test chip for analyzing a specimen.
- a reagent storage unit for storing an aqueous reagent in advance
- the liquid feeding control unit has a channel cross-sectional area smaller than the outlet channel of the reagent storage unit and the inlet of the mixing reaction channel, and has a fine channel
- each liquid is arranged in the order of an aqueous reagent, an oily liquid, a surface tension larger than that of the aqueous reagent, and an aqueous liquid facing the outlet channel, and the aqueous liquid is supplied to the liquid feeding control unit. Is housed in contact,
- the aqueous liquid passes through the fine passage of the liquid supply control unit by applying a liquid supply pressure equal to or higher than a predetermined pressure to the reagent storage unit.
- the test chip according to the second aspect of the present invention includes a first flow path in which the test chip according to the first aspect is directed toward the downstream side of the reagent container force;
- a first liquid feeding control unit and a second liquid feeding control unit A first liquid feeding control unit and a second liquid feeding control unit
- the first liquid supply control unit is disposed at a position ahead of a branch point of the first flow path with the second flow path;
- the second liquid feeding control unit is disposed in the vicinity of a branch point of the second channel with the first channel;
- Each of the first and second liquid supply control units includes a fine passage that communicates an upstream flow path and a downstream flow path, and has a smaller cross-sectional area than these flow paths. Blocks the passage of the liquid until the liquid supply pressure near the entrance of the micro passage reaches a predetermined pressure, and allows the liquid to pass by applying a liquid supply pressure higher than the predetermined pressure,
- the liquid feeding pressure through which the liquid can pass is smaller in the second liquid feeding control unit than in the first liquid feeding control unit.
- a micro-analysis system includes:
- test chip according to the first or second aspect, a system main body, and a powerful micro-analysis system
- the system body is
- a micropump unit provided with a chip connection part having a channel opening for communicating with the microchannel of the inspection chip, and a plurality of micropumps;
- a detection processing device for detecting a reaction in the inspection chip;
- a control device for controlling the micropump unit and the detection processing device, and the inspection chip is provided with a pump connection portion having a flow path opening for communicating with the micropump.
- test chip is mounted in the system main body in a state where the pump connection part of the test chip and the chip connection part of the micro pump unit are in close contact with each other, and then the specimen in the test chip is analyzed.
- the reagent previously enclosed in the reagent storage section does not change due to transpiration or the like during storage or leaks to the external flow path, and further follows from the reagent storage section during use.
- the reagent can be easily flowed out to the channel.
- the reagent can be appropriately supplied to the subsequent process.
- FIG. 1 is a cross-sectional view showing the periphery of a downstream end of a reagent container of a test chip according to the present invention.
- FIG. 2 is a cross-sectional view of a reagent container showing an example of a storage form of an aqueous reagent, an oily liquid, and an aqueous liquid in the reagent container.
- FIG. 3 is a diagram illustrating a configuration in which a micropump is connected to an upstream side of a reagent storage part of a test chip.
- FIG. 4 is a view showing a configuration of a fine flow path of the test chip of the present invention on the downstream side of the reagent storage unit.
- FIG. 5 is a diagram for explaining an example of the flow path configuration of the test chip according to the present invention, showing the flow path configuration from the reagent container to the flow path for analysis.
- FIG. 6 is a perspective view showing an example of a micro analysis system.
- FIG. 7 is a diagram showing an internal configuration of the system main body in the micro analysis system of FIG.
- the present invention includes the following configurations.
- a test chip for analyzing a target substance in a sample provided with a micro flow path for performing a series of operations for mixing and reacting a sample and a reaction reagent and detecting the reaction,
- the flow path is provided with a reagent storage part in which an aqueous reagent is stored in advance, At the downstream end of the reagent container,
- a liquid feed control unit is provided that blocks the passage of liquid until the liquid feed pressure in the direction reaches a predetermined pressure and allows the liquid to pass by applying a liquid feed pressure that is equal to or higher than the predetermined pressure.
- each liquid is stored in the order of an aqueous reagent, an oily liquid, and an aqueous liquid in the downstream direction, and the aqueous liquid is in contact with the liquid feeding control unit.
- the test chip of Configuration 1 is directed to the downstream side of the reagent container force, the first flow path, the second flow path branched from the first flow path, and sends the aqueous reagent to the next process;
- the upstream channel and the downstream channel communicate with each other, and the channel cross-sectional area is smaller than these channels.
- the first liquid feeding control unit that blocks the passage of the liquid until the liquid pressure reaches a predetermined pressure and allows the liquid to pass by applying a liquid feeding pressure equal to or higher than the predetermined pressure.
- a second liquid feeding control unit smaller than the first liquid feeding control unit,
- the first liquid supply control unit is disposed at a position ahead of a branch point of the first flow path with the second flow path;
- the second liquid feeding control unit is arranged near the branch point of the second channel with the first channel.
- a micro-analysis system is configured together with the test chip force system body of configuration 1 or 2 above.
- the system body of this micro analysis system is
- a base body A base body,
- a micropump unit provided in the base body and provided with a chip connection part having a channel opening for communicating with a microchannel of the inspection chip, and a plurality of micropumps;
- the inspection chip of the present invention is used as a microreactor for chemical analysis, various inspections, sample processing / separation, chemical synthesis, and the like, so that each flow path element or structure is functionally positioned appropriately. Arranged by microfabrication technology.
- the test chip is provided with a plurality of reagent storage units for storing each reagent, and the reagent storage unit stores reagents, a cleaning solution, a denaturing solution, and the like used for a predetermined reaction. This is because it is desirable that the reagent is stored in advance so that the examination can be performed quickly regardless of the place and time.
- the inspection chip can be manufactured using, for example, a groove-shaped substrate in which grooves for forming a flow path and the like are formed in advance on the substrate surface, and a coated substrate that is in close contact with the groove-formed substrate. .
- the groove forming substrate is formed with each structure portion and a flow path for communicating these structure portions.
- Specific examples of such a structural part include a pump connection part, a liquid storage part such as each storage part (reagent storage part, sample storage part, etc.) and a waste liquid storage part, a valve base part, a liquid feed control part (described later).
- a pump connection part a liquid storage part such as each storage part (reagent storage part, sample storage part, etc.) and a waste liquid storage part, a valve base part, a liquid feed control part (described later).
- backflow prevention parts check valves, active valves, etc.
- reagent quantification parts mixing parts, etc.
- Such a structure and a flow path are also formed on the coated substrate.
- An inspection chip is configured by covering the structure portion and the flow path by adhering a covering substrate to the groove forming substrate. When optically detecting a reaction in the inspection chip, at least the detection unit of the above-described structural units needs to be covered with a light-transmitting coated substrate.
- the inspection chip is usually produced by appropriately combining one or more molding materials.
- the molding material for the inspection chip include plastic resin, various inorganic glasses, silicon, ceramics, and metals.
- the chip is intended for a large number of measurement specimens, particularly clinical specimens that are at risk of contamination or infection, and it is more versatile and capable of mass production.
- plastic resin as the molding material for the inspection chip.
- a substrate for forming and processing a channel such as a groove forming substrate
- hydrophobic and water repellent so that a very small amount of sample liquid that is difficult to cause deformation of the channel due to water absorption can be sent without loss in the middle.
- Plastics are preferred.
- Such materials include polystyrene, polyethylene, and polypropylene. Examples thereof include resins such as lene, polyethylene terephthalate, polyethylene naphthalate, polyethylene butyl alcohol, polycarbonate, polymethylpentene, fluorocarbon, and saturated cyclic polyolefin.
- polystyrene is preferred as a material for forming a grooved substrate that has excellent transparency, mechanical properties, and moldability and is finely processed.
- a resin having excellent heat resistance such as polycarbonate, polyimide, polyetherimide, polybenzimidazole, polyetheretherketone, etc. is used as a substrate material. Used as.
- a predetermined portion of the flow path of the microreactor or a reaction site is often heated to a desired temperature.
- the heating temperature in the heating area is usually up to about 100 ° C.
- a light-transmitting member is disposed on at least a portion of the inspection chip surface covering the detection portion of the fine channel.
- a transparent material such as alkali glass, quartz glass, or transparent plastic is used as a material for the coated substrate that covers the detection site. Note that such a light-transmitting coated substrate may cover the entire top surface of the inspection chip.
- the flow path of the inspection chip as the microreactor is formed on the substrate according to the flow path arrangement designed in advance according to the purpose.
- the flow path through which the liquid flows is, for example, a micrometer formed with a width of several tens to several hundreds / zm, preferably 50 to: LOO ⁇ m, and a depth force of 25 to 400 ⁇ m, preferably 50 to 300 ⁇ m. It is a microchannel with an order width. If the channel width is narrowed, the channel resistance increases, which may cause problems with liquid delivery. If the flow path width is too wide, the advantage of the microscale space is diminished.
- the vertical and horizontal size of the entire inspection chip is typically several tens of mm, and its height is several millimeters.
- Each structural part and flow path of the substrate can be formed by a conventional microfabrication technique.
- a pattern that models the constituent elements of the inspection chip is produced by photolithography technology, and this pattern is transferred to a resin.
- the basic substrate material that forms the microreactor channel of the microreactor is preferably a plastic resin that can accurately transfer a submicron structure and has good mechanical properties. Among them, polystyrene and polydimethylsiloxane are excellent in shape transferability. If necessary, processing for forming each structural portion and flow path of the substrate by injection molding, extrusion molding, or the like may be performed.
- a pump connection unit for connection to a separate micropump is provided on the upstream side of the micro flow path of the test chip.
- the pump connection portion is provided with a flow passage opening communicating with the above-described storage portion, and the flow rate of the flow passage is supplied by the micropump, and the liquid in each storage portion is pushed downstream.
- Micropump is a force that can be installed on the inspection chip Normally, a system that incorporates a unit that controls liquid feeding in the fine flow path of the inspection chip, temperature control of the inspection chip, detection of reaction, etc. Installed on the main body.
- FIG. 1 is a cross-sectional view showing the periphery of the downstream end of the reagent storage part of the test chip of the present invention.
- the aqueous liquid 23 accommodated on the most downstream side of the reagent accommodating portion 18 is in contact with the small-diameter liquid feed control passage 16, and the outflow to the flow passage 15 ⁇ beyond that is suppressed.
- the liquid feeding control passage 16 communicates the flow path 15m constituting the reagent container 18 with the downstream flow path 15 ⁇ , and has a cross-sectional area (cross-sectional area perpendicular to the flow path). The cross-sectional area of the channel 15m and the channel 15n is smaller.
- the flow path wall of a series of flow paths from the flow path 15m to the flow path 15 ⁇ via the liquid feed control path 16 is formed of a hydrophobic material such as plastic resin, the flow path 15 ⁇ Water in contact with The passing through the flow path 15 ⁇ is restricted due to the difference in surface tension with the flow path wall.
- the size of the flow path 15m, the liquid feeding control path 16, and the flow path 15 ⁇ is not particularly limited as long as the passage of the liquid to the flow path 15 ⁇ can be restricted in this way, but as an example, the vertical and horizontal directions are 150 / ⁇ ⁇ ⁇
- the liquid feed control passage 16 is formed so that the longitudinal and lateral forces are about 5 m X 25 m with respect to the flow paths 15m and 15 ⁇ of 30 O / zm.
- the upstream side of the reagent storage unit 18 communicates with the micropump 11 connected via the pump connection unit 12 of the test chip.
- a liquid feeding pressure equal to or higher than a predetermined pressure is applied by the micropump 11, thereby causing the aqueous liquid 23 to resist the surface tension.
- Liquid feed control Push out from passage 16 to passage 15 ⁇ . After the aqueous liquid 23 flows out into the flow path 15 ⁇ , the liquid stored in the reagent storage section 18 does not flow into the flow path 15 ⁇ without maintaining the liquid feeding pressure required to push the tip of the aqueous liquid 23 into the flow path 15 ⁇ . It will flow.
- the downstream end of the flow path 15m constituting the reagent storage unit 18, the liquid supply control path 16, and the upstream end of the flow path 15 ⁇ The liquid supply control unit 13 blocks the passage of the liquid stored in the reagent storage unit 18 until the liquid supply pressure in the direction reaches a predetermined pressure, and allows the liquid to pass by applying a liquid supply pressure force S of a predetermined pressure or higher. Is configured.
- the liquid feeding control unit is provided at the downstream end of the reagent containing unit, the content liquid in the reagent containing unit is moved forward from the liquid feeding control passage when storing the test chip.
- the content liquid in the reagent storage unit is pushed out to the subsequent flow path by applying a liquid feed pressure of a predetermined pressure or more by a microphone pump connected to the upstream side of the reagent storage unit. Therefore, the aqueous reagent can be easily discharged to the subsequent flow path.
- the flow path walls of a series of flow paths from the flow path 15m to the flow path 15 ⁇ via the liquid feed control path 16 are formed of a hydrophilic material such as glass, at least the liquid feed It is necessary to apply a water-repellent coating, for example, a fluorine-based coating, to the inner surface of the control passage 16
- a water-repellent coating for example, a fluorine-based coating
- the aqueous liquid 23 for example, a buffer liquid having a normal composition can be used. Force difference between the surface tension of the liquid feed control passage 16 and the inner surface of the liquid feed control passage 16.
- the aqueous liquid 23 passes through the liquid feed control passage 16. It is necessary to be a hydrophilic liquid large enough to suppress the pressure to a desired pressure.
- the capacity of the aqueous liquid 23 in the reagent container 18 is also determined according to this purpose.
- the oily liquid 22 is for preventing the aqueous reagent 21 from evaporating (and leaking, mixing with bubbles, contamination, denaturation, etc.) during storage of the test chip.
- the amount to be stored is also determined according to this purpose.
- the oily liquid 22 is similarly stored in contact with the aqueous reagent 21 on the upstream side of the reagent storage unit 18.
- the aqueous reagent 21 accommodated in the reagent accommodating portion 18 is completely sealed with the oily liquid 22 at both ends.
- the oil-containing liquid that seals the aqueous reagent is stored in the reagent storage portion in this way, evaporation of the reagent during storage is prevented. Further, since the aqueous liquid having a large difference in surface tension with the hydrophobic flow path wall surface is accommodated on the downstream side of the oily liquid, the water repellent action in the liquid feeding control unit functions and the liquid feeding Outflow of aqueous liquid from the control passage is blocked. Therefore, the aqueous reagent does not leak into the downstream channel during storage.
- each liquid in the reagent storage unit 18 is accommodated in the order of the aqueous liquid 23, the oily liquid 22, the aqueous reagent 21, the oily liquid 22, and the aqueous liquid 23 from the upstream side to the downstream side of the reagent containing unit 18.
- Force required to provide the liquid supply control passage 16 of FIG. 1 at the downstream end of the reagent storage unit 18 As shown in FIG. 2, the aqueous liquid 23 is stored upstream of the reagent storage unit 18 and the reagent storage unit 18 Similarly, the liquid feeding control passage 16 may be provided at the upstream end of the liquid.
- At least one of the reagent containing parts containing various aqueous reagents has the configuration described above.
- Aqueous reagents are mixed with the sample and reacted.
- a typical example is a reagent (eg, a reagent such as a primer in a PCR method), but is not limited thereto, and other reagents contained in a test chip, for example, a sample for pretreatment It may be a reagent or a reagent for performing each treatment on the liquid after the reaction after the reaction between the sample and the reaction reagent.
- a denaturing solution that denatures the gene amplified by the reaction with the reaction reagent, a solution of probe DNA that hybridizes with the amplified gene, and the like.
- the shape of the reagent container may be various shapes such as an elongated channel shape and a wide liquid reservoir shape as long as the liquid feeding control unit 13 can be configured at least at the downstream end thereof. Further, the reagent storage unit 18 may be provided with a reservoir-like storage unit for storing the oily liquid 22 and the aqueous liquid 23 individually.
- the reagent storage unit that stores the aqueous reagent has the above-described configuration, and the downstream flow path has the following configuration.
- the flow channel configuration will be described below by taking as an example a case where an aqueous reagent is a reagent for reacting with a specimen.
- FIG. 4 is a diagram showing a flow path configuration on the downstream side of the reagent container in the test chip of the present invention
- FIG. 5 is a flow path for mixing a plurality of reagents and sending the mixed reagent to the analysis flow path on the downstream side.
- a first flow path 15g is provided downstream of the reagent storage unit 18a from the reagent storage unit 18a toward the downstream side.
- the second flow path 15h for sending the reagent to the next step is the first flow path. Branching from 15g.
- the first liquid supply control unit 13b provided with the liquid supply control passage 16 described above is arranged at a position ahead of the branch point of the first flow path 15g with the second flow path 15h. ing.
- the second liquid supply control unit 13c is disposed in the vicinity of the branch point of the second flow path 15h with the first flow path 15g.
- a liquid feed provided at the downstream end of the reagent container 18a by applying a liquid feed pressure of a predetermined pressure or higher by a micropump (not shown) connected to the upstream side of the reagent container 18a.
- a micropump (not shown) connected to the upstream side of the reagent container 18a.
- the liquid feeding pressure that allows passage of the aqueous reagent 21 in the second liquid feeding control unit 13c is smaller than the liquid feeding pressure that allows passage of the aqueous liquid 23 in the first liquid feeding control unit 13b.
- these liquid supply control passages are performed. It is possible to make a difference in the liquid feeding pressure at which the liquid can pass through the path 16.
- the difference in surface tension between the liquid and the flow path wall of the liquid supply control passage 16 may be made different between the first liquid supply control unit 13b and the second liquid supply control unit 13c. Therefore, it is not possible to consider making a difference in the liquid feeding pressure through which the liquid can pass.
- the leading end portion of the internal liquid pushed out by the micropump in this way has a branch point between the first flow path and the second flow path at the first flow path side. And the movement is blocked by the first liquid supply control unit. After that, the micropump blocks the outflow of the liquid in the first liquid supply control unit, and the second liquid supply control unit force. The aqueous reagent flows out first and is sent to the subsequent process.
- the liquid feeding pressure is further increased by the micropump, and the aqueous reagent 21 passes through the second liquid feeding control unit 13c.
- the aqueous reagent 21 is passed through the second liquid feeding control unit 13c of the second flow path 15h first, and thereby the aqueous liquid 23 and the oily liquid 22 are passed through the second liquid feeding control part 13c. Only the aqueous reagent 21 is sent to the next process from the second flow path 15h, leaving the first flow path 15g.
- the aqueous liquid 23 and the oily liquid 22 are prevented from being sent out to the flow path that continues to the next process, so that the aqueous liquid 23 and the oily liquid 22 go to the flow path that continues to the next process. It can avoid the harmful effects of being sent out.
- Aqueous liquid 23 and oily liquid 22 At a certain time, the liquid feeding pressure of the micropump is increased and pushed out from the first liquid feeding control unit 13b, and stored in, for example, a waste liquid reservoir provided in the inspection chip.
- the aqueous reagent contains a surfactant
- the difference in surface tension with the flow path wall becomes small, and the second liquid feeding control unit 13c may not function.
- FIG. 5 shows the flow channel configuration of FIG. 4 only in the downstream flow channel from the reagent storage unit 18a, and the flow channel downstream of the other reagent storage units 18b and 18c is shown in FIG. Force of omitting the flow path configuration
- FIG. 5 shows the flow channel configuration of FIG. 4 only in the downstream flow channel from the reagent storage unit 18a, and the flow channel downstream of the other reagent storage units 18b and 18c is shown in FIG. Force of omitting the flow path configuration
- each aqueous reagent in the reagent storage units 18a to 18c led to the liquid supply control unit 13c has a predetermined liquid supply pressure by the micropump 11 connected to the upstream side of the reagent storage units 18a to 18c. By raising the pressure above the pressure, it is introduced into the flow path 15a ahead and merged and mixed. Also in the flow path 15a for mixing each reagent, in order to prevent the leading portion of the mixed reagent whose mixing ratio is unstable from being sent to the next process, the liquid feeding control unit 13d (first liquid feeding control in FIG. 4). 4) and the liquid feed control unit 13e (corresponding to the second liquid feed control unit 13c in FIG. 4), the flow path configuration is the same as in FIG. 4, and the tip of the mixed reagent is the liquid feed control unit 13d. Crawling to trap.
- the reagent mixed in the flow path 15a is sent to the flow paths 15b, 15c and 15d for analysis.
- mixing, reaction, and detection of the mixed reagent and the specimen are performed in these flow paths.
- simultaneous analysis such as simultaneous multi-item analysis, positive control, and negative control is performed.
- the test chip of the present invention described above is subjected to reaction and analysis, for example, by being attached to a separate system body.
- This system body and test chip constitute a micro analysis system.
- An example of this micro analysis system will be described below.
- FIG. 6 is a perspective view showing an example of a micro analysis system
- FIG. 7 is a view showing an internal configuration of a system main body in the micro analysis system.
- the system main body 3 of the micro-analysis system 1 includes a housing-like base main body 31 that houses each device for analysis. Inside the base body 31, a micro pump unit 37 provided with a chip connecting portion 38 having a channel opening for communicating with the test chip 2 and a plurality of micro pumps 11 is disposed.
- a detection processing device (LED, photomultiplier, light source 39 such as a CCD camera, and the like, a visible spectroscopic method, a fluorescence photometric method, etc. for detecting a reaction in the test chip 2 are provided.
- a control device (not shown) for controlling the detection processing device and the microphone port pump unit 37 are provided.
- the micro pump 37 is controlled by applying a driving voltage according to the program in which various conditions relating to the liquid feeding sequence, flow rate, timing, etc. are set in advance to the microphone port pump 11.
- the opening of the flow path provided on the upstream side of the fine flow path of the test chip 2 (for example, the upstream side of the reagent storage unit, the specimen storage unit, etc.) and the chip surface force around it are also provided.
- the target substance in the sample is analyzed in the test chip 2 Is done.
- the inspection chip 2 is placed on the transport tray 34 and introduced into the base body 31 from the chip insertion port 32.
- a heating / cooling unit for locally heating or cooling the inspection chip 2 mounted at a predetermined position.
- the reagent container 18 is selectively cooled by pressing the Peltier element 35 against the region of the reagent container 18 (FIGS. 1 and 2) in the test chip 2 to thereby change the quality of the reagent.
- the heater 4 is pressed against the region of the flow path that constitutes the reaction section to selectively heat the reaction section, thereby bringing the reaction section to a temperature suitable for the reaction.
- the micropump unit 37 for example, silicon by photolithography technology, A substrate in which a plurality of pump parts are formed on a substrate such as glass or resin and the substrate surface on which the pump parts are formed is covered with another substrate or the like can be used.
- the micropump unit 37 is connected to the driving fluid tank 10, and the upstream side of the micropump 11 communicates with the driving fluid tank 10.
- the downstream side of the micropump 11 communicates with the channel opening provided on one side of the micropump unit 37.
- Each channel opening communicated with each micropump 11 and the pump connection of the inspection chip 2
- the test chip 2 is connected to the micropump unit 37 so that the respective channel openings provided in the section 12 are connected.
- the chip connection part 38 is connected to the port of the pump connection part 12 by superimposing the pump connection part 12 of the inspection chip 2 and the chip connection part 38 of the micro pump unit 37 on each other.
- a flow path from the micro pump 11 to the fine flow path of the test chip 2 is formed.
- Oil-based or water-based driving fluid such as mineral oil stored in the driving fluid tank 24 is transferred by the micropump 11 to the storage portion of each fluid in the inspection chip 2 via the pump connection portion 12.
- the liquid in each container is pumped out by the driving liquid and is pumped to the downstream side of the inspection chip 2 and fed.
- a pump driven by a piezo element described in Japanese Patent Laid-Open Nos. 2001-322099 and 2004-108285 can be used.
- the microphone pump includes a first flow path in which the flow path resistance changes in accordance with the differential pressure, a second flow path in which the change rate of the flow path resistance with respect to the change in the differential pressure is smaller than the first flow path, A pressurizing chamber connected to the flow path and the second flow path, and an actuator for changing the internal pressure of the pressurizing chamber.
- the actuator is driven in a reverse direction by driving the actuator with a separate driving device.
- the liquid can be fed in the direction.
- a series of analysis steps of pretreatment, reaction, and detection of a specimen as a measurement sample is performed with a test chip 2 mounted on a system body 1 in which a micro pump, a detection processing device, and a control device are integrated. Done.
- the prescribed reaction and optical measurement based on the feeding, pretreatment, and mixing of samples and reagents are automatically performed as a series of continuous steps, and the measurement data is recorded under the necessary conditions and recorded items. And stored in the file.
- the result of the analysis is displayed on the display unit 33 of the base body 31.
- Specific examples of the reaction between the specimen and the reagent using the test chip of the present invention and the detection thereof are shown below.
- a sample container into which a sample or an analyte extracted from the sample for example, DNA, RNA, gene
- a sample pretreatment unit for preprocessing the sample for preprocessing the sample
- a reagent storage section for storing reagents used in probe binding reactions, detection reactions (including gene amplification reactions or antigen-antibody reactions);
- a probe housing part that houses a probe (for example, a probe that is hybridized to a gene to be detected amplified by a gene amplification reaction);
- a pump connection portion that can be connected to a separate micropump for feeding the liquid in the storage portions and the flow paths.
- a micropump is connected to the test chip via a pump connection section, and the specimen or specimen force extracted biological material (for example, DNA or other biological substance) contained in the specimen storage section and the reagent
- the reagent contained in the container is sent to a downstream channel, and mixed and reacted at a reaction site of the fine channel, for example, a site where a gene amplification reaction (such as an antigen-antibody reaction in the case of protein) is performed.
- a gene amplification reaction such as an antigen-antibody reaction in the case of protein
- the processing solution obtained by processing this reaction solution and the probe stored in the probe storage unit are sent to the detection unit in the downstream channel, mixed in the channel, and combined (or hybridized) with the probe.
- the biological material is detected based on the reaction product.
- the sample storage unit in the test chip communicates with the sample injection unit, and temporarily stores the sample and supplies the sample to the mixing unit.
- the specimen injection part that injects the specimen from the upper surface of the specimen storage part is made of a rubber-like material to prevent leakage, infection and contamination to the outside, and to ensure sealing. It is desirable that a plug made of any elastic material is formed and covered with a resin, a reinforced film such as polydimethylsiloxane (PDMS).
- PDMS polydimethylsiloxane
- the specimen in the syringe is injected with a rubber stopper inserted through a dollar or through a pore with a lid. In the former case, it is preferable that the needle hole is immediately closed when the needle is pulled out. Or you may install another specimen injection mechanism.
- sample injected into the sample storage unit is mixed with, for example, the sample and the treatment liquid in the sample pretreatment unit provided in advance in the flow path before mixing with the reagent, if necessary.
- a specimen pretreatment section may include a separation filter, an adsorption resin, beads and the like.
- Preferred sample pretreatments include analyte separation or concentration, deproteinization, and the like.
- a lysis agent such as a 1% SDS mixture, perform lysis treatment 'DNA extraction treatment. In this process, DNA is released from inside the cell and adsorbed on the membrane surface of the bead or filter.
- a predetermined amount of necessary reagents are sealed in the reagent container of the test chip in advance. Therefore, it is not necessary to fill the required amount of reagent each time it is used.
- reagents necessary for the measurement are generally known.
- a reagent containing an antibody against it preferably a monoclonal antibody, is used.
- the antibody is preferably labeled with piotin and FITC!
- Reagents for gene testing include various reagents used for gene amplification, probes used for detection, and coloring reagents, as well as pretreatment reagents used for the specimen pretreatment if necessary. Also good.
- Micropump force Reaction capacity required for analysis such as gene amplification reaction, analyte trap, or antigen-antibody reaction by supplying the driving solution and pushing the sample solution and reagent solution together. Is started.
- a PCR amplification method described in various documents including improved points and actively used in various fields can be used.
- a channel device that enables temperature control suitable for a microchip has already been proposed by the present inventors. Open 2004 108285).
- This device system may be applied to the amplification channel of the chip of the present invention.
- the heat cycle can be switched at high speed, and the microchannel is used as a micro-mouth reaction cell with a small heat capacity, so that DNA amplification can be performed in a much shorter time than the conventional method that is performed manually.
- the amplification method is a suitable amplification technique in the system of the present invention because DNA amplification can be carried out in a short time at an arbitrary constant temperature of 50 to 65 ° C (Patent No. 3433929).
- the method which works for one hour, is completed in 10 to 20 minutes, preferably 15 minutes, in the system of the present invention.
- a detection site for detecting an analyte for example, an amplified gene
- At least the detection part is made of a transparent material, preferably a transparent plastic, in order to enable optical measurement.
- Piotin-affinity protein (avidin, streptavidin) adsorbed at the detection site on the microchannel is labeled at the 5 'end of the primer used in the gene amplification reaction, or on the biotin labeled with the probe substance. It binds specifically with piotin. This traps the probe labeled with piotin or the amplified gene at the detection site.
- the method for detecting the separated analyte or the amplified DNA of the target gene is not particularly limited, but as a preferred embodiment, it is basically carried out in the following steps.
- the amplification reaction solution containing the gene amplified in the microchannel and the denaturing solution are mixed, and the amplified gene is subjected to denaturation treatment. It is hybridized with the probe DNA that is made into a single strand and fluorescently labeled with FITC (fluorescein isothiocyanate).
- the solution is sent to the detection site in the microchannel to which the piotin affinity protein is adsorbed.
- the amplified gene is trapped at a detection site in the microchannel (the amplified gene may be trapped at the detection site, and then fluorescently labeled probe DNA may be neutralized.)
- a reagent containing a specific antibody against an analyte such as a metabolite or hormone, preferably a monoclonal antibody, is mixed with the sample. In that case, the antibody is labeled with piotin and FITC. Therefore, the product obtained by the antigen-antibody reaction has piotin and FITC.
- This is sent to a detection site in a microchannel adsorbed with a phytin affinity protein (preferably streptavidin), and fixed to the detection site through the binding of the biotin affinity protein and piotine.
- a phytin affinity protein preferably streptavidin
- a gold colloid solution whose surface has been modified with an anti-FITC antibody that specifically binds to FITC is allowed to flow into the microchannel, and the immobilized analyte 'antibody reaction product FITC or genetic
- the colloidal gold is adsorbed to the FITC-modified probe hybridized to the child.
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Hematology (AREA)
- Clinical Laboratory Science (AREA)
- Automatic Analysis And Handling Materials Therefor (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06732131A EP1873533A4 (en) | 2005-04-20 | 2006-04-20 | TEST CHIP FOR SAMPLE ANALYSIS AND MICRO ANALYSIS SYSTEM |
JP2007528184A JPWO2006112498A1 (ja) | 2005-04-20 | 2006-04-20 | 検体を分析するための検査チップおよびマイクロ分析システム |
Applications Claiming Priority (2)
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JP2005-122165 | 2005-04-20 | ||
JP2005122165 | 2005-04-20 |
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WO2006112498A1 true WO2006112498A1 (ja) | 2006-10-26 |
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PCT/JP2006/308273 WO2006112498A1 (ja) | 2005-04-20 | 2006-04-20 | 検体を分析するための検査チップおよびマイクロ分析システム |
Country Status (5)
Country | Link |
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US (1) | US7820109B2 (ja) |
EP (1) | EP1873533A4 (ja) |
JP (1) | JPWO2006112498A1 (ja) |
CN (1) | CN101160529A (ja) |
WO (1) | WO2006112498A1 (ja) |
Cited By (4)
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WO2008087828A1 (ja) * | 2007-01-18 | 2008-07-24 | Konica Minolta Medical & Graphic, Inc. | マイクロチップ |
JP2010085333A (ja) * | 2008-10-01 | 2010-04-15 | Sharp Corp | 送液構造体及びこれを用いたマイクロ分析チップならびに分析装置 |
JP2013068546A (ja) * | 2011-09-22 | 2013-04-18 | Sharp Corp | 送液装置及び送液方法 |
CN110734851A (zh) * | 2018-07-19 | 2020-01-31 | 深圳华大生命科学研究院 | 换液装置、基因测序仪 |
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US7659110B2 (en) * | 2005-01-21 | 2010-02-09 | Thermogen Inc. | DNA amplification device |
US8021629B2 (en) * | 2005-03-24 | 2011-09-20 | Konica Minolta Medical & Graphic, Inc. | Analyzer |
JP2008145320A (ja) * | 2006-12-12 | 2008-06-26 | Konica Minolta Medical & Graphic Inc | マイクロチップ検査装置 |
US8017409B2 (en) * | 2009-05-29 | 2011-09-13 | Ecolab Usa Inc. | Microflow analytical system |
JP5426476B2 (ja) * | 2010-05-21 | 2014-02-26 | 株式会社エンプラス | 分析用具及びマイクロ分析システム |
EP2596347B1 (en) | 2010-07-22 | 2017-09-06 | Hach Company | Alkalinity analysis using a lab-on-a-chip |
JP2013040782A (ja) * | 2011-08-11 | 2013-02-28 | Sony Corp | 光学的測定装置及びチップ寿命判定方法 |
US9180449B2 (en) | 2012-06-12 | 2015-11-10 | Hach Company | Mobile water analysis |
USD768872S1 (en) | 2012-12-12 | 2016-10-11 | Hach Company | Cuvette for a water analysis instrument |
DE102016222032A1 (de) * | 2016-11-10 | 2018-05-17 | Robert Bosch Gmbh | Mikrofluidische Vorrichtung und Verfahren zur Analyse von Nukleinsäuren |
CN108072648B (zh) * | 2016-11-15 | 2024-04-09 | 杭州绿洁科技股份有限公司 | 一种用于检测总氮总磷的微流控芯片集成系统 |
CN113751087B (zh) * | 2021-07-23 | 2022-10-11 | 嘉兴医脉赛科技有限公司 | 一种芯片连接装置 |
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- 2006-04-20 CN CNA2006800125462A patent/CN101160529A/zh active Pending
- 2006-04-20 JP JP2007528184A patent/JPWO2006112498A1/ja not_active Withdrawn
- 2006-04-20 WO PCT/JP2006/308273 patent/WO2006112498A1/ja active Application Filing
- 2006-04-20 EP EP06732131A patent/EP1873533A4/en active Pending
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JP2003181255A (ja) * | 2001-12-21 | 2003-07-02 | Minolta Co Ltd | マイクロチップ、該マイクロチップを用いた検査装置及び混合方法 |
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JP2010085333A (ja) * | 2008-10-01 | 2010-04-15 | Sharp Corp | 送液構造体及びこれを用いたマイクロ分析チップならびに分析装置 |
JP2013068546A (ja) * | 2011-09-22 | 2013-04-18 | Sharp Corp | 送液装置及び送液方法 |
CN110734851A (zh) * | 2018-07-19 | 2020-01-31 | 深圳华大生命科学研究院 | 换液装置、基因测序仪 |
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Also Published As
Publication number | Publication date |
---|---|
CN101160529A (zh) | 2008-04-09 |
US20060239862A1 (en) | 2006-10-26 |
US7820109B2 (en) | 2010-10-26 |
EP1873533A1 (en) | 2008-01-02 |
EP1873533A4 (en) | 2009-12-30 |
JPWO2006112498A1 (ja) | 2008-12-11 |
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