WO2005064339A1 - 生体サンプル判別装置、生体サンプル判別方法、及び生体サンプル判別用プレート - Google Patents
生体サンプル判別装置、生体サンプル判別方法、及び生体サンプル判別用プレート Download PDFInfo
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- WO2005064339A1 WO2005064339A1 PCT/JP2004/019508 JP2004019508W WO2005064339A1 WO 2005064339 A1 WO2005064339 A1 WO 2005064339A1 JP 2004019508 W JP2004019508 W JP 2004019508W WO 2005064339 A1 WO2005064339 A1 WO 2005064339A1
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- biological sample
- flow path
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- sample
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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
- 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
- B01L2300/00—Additional constructional details
- B01L2300/08—Geometry, shape and general structure
- B01L2300/0803—Disc shape
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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
- B01L2300/0864—Configuration of multiple channels and/or chambers in a single devices comprising only one inlet and multiple receiving wells, e.g. for separation, splitting
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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
- B01L2300/1838—Means for temperature control using fluid heat transfer medium
- B01L2300/1844—Means for temperature control using fluid heat transfer medium using fans
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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
- B01L2400/0409—Moving fluids with specific forces or mechanical means specific forces centrifugal forces
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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
- B01L3/5025—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures for parallel transport of multiple samples
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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
Definitions
- the present invention relates to a biological sample discriminating apparatus, a biological sample discriminating method, and a biological sample discriminating plate for discriminating a biological sample by moving a biological sample such as DNA or protein in a buffer.
- SNPs short for single nucleotide polymorphism, which is generally translated as "single nucleotide polymorphism" and is a collective term for the difference of one code (one nucleotide) in a gene
- SNPs single nucleotide polymorphism
- the most commonly used method for examining SNPs is sequencing (determination of the nucleotide sequence) in which the nucleotide sequence of DNA is read directly from the end.
- sequencing determination of the nucleotide sequence
- the most commonly performed method is dideoxy sequencing (Sanger method). Sequencing can be performed by any method including the Sanger method, and the difference in the length of one base is separated by high resolution! Denaturing polyacrylamide gel electrophoresis or capillary electrophoresis. 'It is based on identifying technology.
- the classification of SNPs by such a sequencing method involves isolating the target gene, amplifying it, purifying it, and reading the base sequence of the target gene using the gene base sequence determination method (apparatus). By doing Therefore, the experiment requires a large amount of work and time, and furthermore, a large running cost.
- an automated apparatus for sequencing is very expensive, occupies a large space, and is expensive. The need for large amounts of reagents presents problems.
- Affinity ligand cavernary electrophoresis is a technique that uses intermolecular affinity, especially specific affinity in ecosystems (enzyme-substrate affinity, antigen-antibody affinity, etc.) to give specificity to separation.
- Affinity ligand cavernary electrophoresis is a technique that uses intermolecular affinity, especially specific affinity in ecosystems (enzyme-substrate affinity, antigen-antibody affinity, etc.) to give specificity to separation.
- one of the two interacting components is added to the electrophoresis solution in a capillary tube, and the other component is electrophoresed.
- the analysis focuses on the fact that changes occur in the moving speed (see, for example, Patent Document 1).
- a single strand complementary to the base sequence of the test DNA is used as an affinity ligand that specifically recognizes the base sequence.
- the affinity ligand containing a polynucleotide as a component has a negative charge, so that when a voltage is applied, the affinity ligand flows out of the cavities.
- a single strand which is an affinity ligand and has a complementary relationship with the base sequence of the test DNA, is immobilized in a capillary.
- test DNA As a method of immobilization, a method has been proposed in which vinylidani DNA is copolymerized with polyacrylamide, and the resulting DNA is covalently immobilized on the inner wall of the capillary.
- the test DNA strongly interacts with the fixed oligonucleotide, which is an affinity ligand, and is adsorbed into the capillary, while the noise DNA flows out of the capillary without being adsorbed by the fixed oligonucleotide.
- the test DNA can be detected (see Patent Document 1).
- the present applicant has developed a method of immobilizing the affinity ligand in a capillary so that the interaction between the affinity ligand and the sample is not limited to the vicinity of the wall surface.
- the target DNA contained in the DNA sample is detected.
- DNA has a force DNA having a double-stranded DNA and a single-stranded DNA.
- the four bases T, C, and G make it easy for A and T, and G and C to bind to each other, and are paired with ⁇ — ⁇ and G—C in the double strand of DN ⁇ .
- the other DNA has a 3,1 TAGCGCA-5, t ⁇ ⁇ base sequence.
- the DNA conjugate for separation for separating a DNA sample is complementary to the mutant DNA of the DNA sample in the DNA portion of the DNA conjugate for separation.
- DNA sequences with relevant relationships are given. For example, when the DNA sequence of the mutant DNA, which is the target DNA to be detected in the DNA sample, contains 5,-ATCGCGT-3 'and the DNA sequence of the wild DNA contains 5, -ATCACGT-3', it is underlined. The bases of the mutant DNA and the wild DNA are different in the part where At this time, if the sequence of the DNA portion of the DNA conjugate for separation is 3, 1 TAGCGCA-5, the wild DNA will be underlined and will not be complementary to the DNA conjugate. As a result, the overall binding force of the mutant DNA is one base larger than that of the wild DNA, and the mutant DNA migrates later than the wild DNA during electrophoresis.
- DNA samples are obtained by destroying cells from blood or the like, extracting DNA, and amplifying a portion containing the target DNA sequence by PCR or the like. At this time, when the amplification is performed with a predetermined number of bases, the number of bases of the DNA conjugate having the complementary sequence can also be determined.
- the affinity ligand and DNA can be separated from each other based on the difference in the migration speed of the DNA sample, so that the interaction with the sample is not limited to the vicinity of the wall. Can be determined easily and accurately in a short time.
- proteins are present in cells, tissues, and biological fluids, and regulate biological activity, supply energy to cells, synthesize important substances, maintain biological structures, and further improve communication between cells. -Involved in cases and intracellular communication. It is now becoming clear that proteins have multiple functions, depending on the various environments, the presence of other interacting proteins, and the degree and type of modification they have undergone.
- a polymer compound formed by linking (polymerizing) a large number of L amino acids is a protein, which is one of the important components of living organisms.
- This amino acid sequence is called the primary structure of the protein, and this sequence is determined by the sequence of the gene (DNA). Specifically, one amino acid is designated by three base sequences.
- the ability to call the unit amino acid portion (one NH—CH (-R-) CO—) that has become a constituent component of a protein through peptide bond
- the nature of each R varies depending on the R. The interaction of these residues results in the formation of secondary structures such as the a-helix (helix) structure and j8 sheet structure, and the tertiary structure of the whole protein.
- the function of a protein is determined by the tertiary structure (steric structure). This means that even proteins consisting of the same amino acid sequence have different functions depending on the three-dimensional structure (folding). For example, the prions that cause BSE differ only in the three-dimensional structure from normal prions. Currently, research on the three-dimensional structure and function of proteins is underway, but it is thought that it will be possible to design and synthesize the three-dimensional structure of proteins according to their functions.
- Proteins are made by connecting 20 types of amino acids in order according to the instruction of the gene (sequence information). The type is said to be tens of millions. If the sequence of the gene is known, Information on the order in which amino acids are connected can be obtained.
- a set of proteins that also make up the genes (genomes) of living organisms is called a proteome. The proteome has been actively analyzed after the base sequence of the human genome has been decoded.
- Patent Document 2 Japanese Patent Application Laid-Open No. 2002-340859
- Patent Document 3 Japanese Patent Publication No. 2000-513813
- Patent Document 4 Japanese Translation of International Publication No. 2001-523341
- Patent Document 5 JP-T-2000-514928
- Patent Document 6 JP-A-2003-28883
- a DNA conjugate for separation and a DNA sample are placed in a capillary tube filled with a buffer containing a linear polymer and a DNA binding regulator. Need to be filled. As described above, it is a troublesome task to fill each of the tubes with the DNA conjugate for separation and the DNA sample, and when filling the DNA conjugate for separation and the DNA sample, the amount of the DNA conjugate and the DNA sample are required. If there were differences between the cabins, the measurement results could be affected.
- At least three electrodes are provided by intersecting a plurality of capillary channels and providing at least three electrodes. Force applied to two of the electrodes to move the sample through the intersection.In this method, because the flow paths intersect, the sample migrates well when electrophoresed. However, there is a possibility that accurate measurement results cannot be obtained. Also, for example, in the methods described in Patent Documents 3 and 4, a fine channel is embedded in a platform. By changing the rotation speed of the platform, the centripetal force generated by the rotation is changed to move the sample. However, in this method, the sample can be moved only in the centripetal direction. If the shape of the microchannel is considerably complicated, there is also a problem.
- the biological sample discriminating apparatus comprises a first flow path into which a buffer agent flows, and a first flow path in a part of the flow path.
- a filling unit for adding a fixed amount of the biological sample to the buffer, and a fixed amount held in the fixed portion. Moving the biological sample in the buffer, and moving the biological sample in the buffer.
- a determination unit for determining the Le those comprising a.
- the result of the determination of the biological sample can be obtained only by adding the biological sample to be determined and a buffer to the plate, so that complicated preparation work is not required.
- a biological sample discriminating apparatus capable of obtaining an accurate discrimination result can be provided.
- the plate in the biological sample determination device according to the second aspect of the present invention, may include a buffer injection unit communicating with the first flow path. And a sample injection part communicating with the second flow path, and an air hole communicating with the sample injection part in the second flow path.
- the plate in which the buffer is injected into the agent injection section and the sample is injected into the sample injection section is rotated, and the buffer in the buffer injection section is centrifugally moved to the first flow path.
- the plate is rotated and centrifugal force is applied.
- the biological sample in the second flow path is separated so that a fixed amount of the biological sample remains in the quantitative section of the second flow path.
- the filling process of the buffer into the flow path can be realized by centrifugal force
- the filling process of the biological sample can be realized by the pressure difference in the flow path
- a certain amount of the biological sample is added to the buffer. Since the quantitative addition process can be realized by the centrifugal force, as described above, a biological sample discriminating apparatus can be provided which does not require complicated preparation work and can obtain an accurate discrimination result in a short time.
- the plate in the biological sample determination device according to claim 3 of the present invention, is provided with a buffer injecting part communicating with the first flow path. And a sample injection part communicating with the second flow path, and an air hole communicating with the sample injection part in the second flow path.
- the plate into which the buffer is injected and the sample is injected into the sample injection unit is rotated, and the buffer in the buffer injection unit is caused to flow into the first flow path by centrifugal force.
- the biological sample in the sample injecting section is caused to flow to a first inflow position that does not reach the quantitative section in the second flow path, the biological sample is pressurized, and the biological sample in the second flow path is pressed.
- the first inflow After flowing from the device to the second inflow position including the quantification unit in the second flow path, suction is performed from the air hole so that the fixed amount of the biological sample remains in the quantification unit. This is to separate the biological sample in the second flow path.
- the filling process of the buffer into the flow channel can be realized by centrifugal force, and the filling process of the biological sample into the flow channel and the quantitative addition process of adding a certain amount of the biological sample into the buffer are performed. Since this can be realized by the pressure difference generated in the flow path, complicated preparation work is performed as described above. It is possible to provide a biological sample discriminating apparatus that can obtain an unnecessary and accurate discrimination result in a shorter time.
- the biological sample discriminating apparatus is the biological sample discriminating apparatus according to claim 2 or 3, wherein the filling unit comprises: a motor that rotates the plate at a high speed; And a pressure operation unit that pressurizes or suctions the second flow path.
- the filling unit in addition to the biological sample determination device of claim 2 or 3, the filling unit is provided in the biological sample determination device.
- the discrimination unit is provided at the top of the apparatus, and an elevating stage for vertically moving the plate between the filling unit and the discrimination unit is provided.
- the biological sample determination device is the biological sample determination device according to claim 5, wherein the determination unit is provided on a ceiling plate provided at an upper part of the biological sample determination device. It is suspended via a panel.
- the discrimination unit can be easily installed on the upper portion of the device, and the components of the discrimination unit and the plate can be reliably brought into contact with each other. Thus, an accurate determination result can be obtained.
- the pressure operation unit that pressurizes or suctions the second flow path is provided. , And is suspended from the ceiling plate via a panel.
- the biological sample determination device is the biological sample determination device according to claim 2 or 3, wherein the determination unit determines the temperature of the first channel.
- a heater that measures the temperature with a thermistor and controls the first flow path to a predetermined temperature in accordance with the measurement result, and sets the first flow path to a predetermined temperature with the heater; The biological sample moving inside is determined.
- the temperature of the first flow path can be set to the same condition, so that a more accurate determination result can be obtained in the device.
- the determination unit is provided on the plate instead of the heater and the thermistor.
- the heater and thermistor provided are provided with a heater contact pin and a thermistor contact pin for applying a voltage.
- the discrimination unit can be made more compact, so that the device can be made smaller, lighter, and less expensive.
- the heater is disposed on the first flow path, and the thermistor is provided.
- the heater is disposed at a position apart from the heater by a distance between the first flow path and the heater.
- the temperature of the first flow path is measured by the thermistor at a value close to the actual temperature, and the first flow path can be set to a predetermined temperature without error. , A more accurate determination result can be obtained.
- the thermistor is arranged on the first flow path, and the heater is provided. In addition, it is arranged at a position apart from the thermistor by a distance between the first flow path and the thermistor.
- the biological sample determination device is the biological sample determination device according to claim 2 or 3, wherein the determination unit includes a fitting pin provided on the plate. A fitting pin inserted into the hole, and a low pin for rotating the discrimination unit at a low speed. A high-speed motor, and the plate is fitted and fixed to the discrimination unit with the fitting pins, and then the plate is rotated at a low speed by the low-speed motor together with the discrimination unit, and the plate is rotated at a low speed. Inside, the biological sample moving in the buffer is determined.
- the plate and the discrimination unit can be integrally rotated by the motor, so that a more accurate discrimination result can be obtained in the device.
- the determination unit detects a positioning mark provided on the plate.
- a positioning mark detection sensor is provided, the plate is rotated at a low speed by the low-speed rotation motor, the positioning pin detection sensor detects a fitting pin hole of the plate, and the plate is positioned. The fitting pin is inserted into the hole.
- the plate and the determination unit can be securely fitted.
- the biological sample determination device is the biological sample determination device according to claim 2 or 3, wherein the determination unit includes a positive electrode and a negative electrode.
- the filling unit After the filling unit separates the biological sample in the second flow path so that a fixed amount of the biological sample remains in the quantitative section of the second flow path, the filling unit enters the first flow path in the second flow path. A positive electrode and a negative electrode are inserted, a voltage is applied between the positive electrode and the negative electrode, and a certain amount of the biological sample held in the quantitative section is moved by electrophoresis in the buffer, The biological sample moving in the buffer is determined.
- the biological sample added to the buffer filled in the first flow path can be moved by electrophoresis, and a discrimination result can be obtained based on the movement state. In, an accurate determination result can be obtained in a shorter time.
- a cleaning area for cleaning the positive electrode and the negative electrode is provided on the plate, After the filling unit separates the biological sample in the second flow path so that a fixed amount of the biological sample remains in the quantitative section of the second flow path, the positive electrode and the negative electrode are After washing in the washing area, the positive electrode and the negative electrode are It is inserted into the road.
- the determination unit is provided on the plate instead of the positive electrode and the negative electrode. It has two electrode contact pins for applying voltage to the provided positive and negative electrodes.
- the discrimination unit can be made more compact, so that the device can be made smaller, lighter, and less expensive.
- the biological sample determination device is the biological sample determination device according to claim 14, wherein the biological sample is a DNA sample, and the buffer is the DNA sample. And a DNA conjugate for separation, which is a linear polymer and has a base sequence capable of hydrogen bonding to the target DNA to be detected, which is included in the above, and a DNA binding control agent and a pH buffer.
- the presence or absence of SNPs in the DNA sample to be tested can be accurately determined in a short time without complicated preparation work.
- the biological sample determination device according to claim 18 of the present invention further includes a cooling fan that cools an elevated temperature in the biological sample determination device according to claim 1,
- the air intake of the cooling fan is provided with a light blocking portion for blocking light incident from outside the device.
- the light blocking unit is made of a porous film.
- the apparatus can accurately determine a biological sample.
- the biological sample determination device according to claim 20 of the present invention is the biological sample determination device according to claim 18, wherein the light blocking portion has an L-shaped or crank-shaped baffle force. It is.
- the apparatus can accurately determine a biological sample.
- the biological sample determination device is the biological sample determination device according to claim 2 or 3, wherein the determination unit is filled in the first channel. And an optical detector for detecting the fluorescence or absorbance of the buffer, and discriminating the biological sample moving in the buffer based on the detection result of the optical detector.
- the optical detection unit is provided on an elevating stage that moves the plate up and down. And a height adjustment unit for measuring a distance between the plate and the lifting stage on the lifting stage and adjusting the measurement result to be constant.
- the distance between the optical detection unit and the plate can be kept constant, so that a more accurate determination result can be obtained in the device.
- the biological sample determination method for detecting a biological sample moving in a buffer and determining the biological sample includes the buffer.
- a fixed amount of the biological sample is left in the quantitative section of the second flow path, and a predetermined amount of the biological sample is added to the buffer.
- the fixed amount of the biological sample is moved in the buffer, and the biological sample moving in the buffer is determined.
- the discrimination result of the biological sample can be obtained only by adding the biological sample to be discriminated and the buffer to the plate, so that complicated preparation work is not required and an accurate discrimination result can be obtained. Can be.
- the first flow path into which the buffer is injected, and the quantification unit A flow path pattern having the second flow path into which the biological sample is injected, and an air hole communicating with the sample injection part into which the biological sample is injected at V in the second flow path.
- the formed plate is rotated at a high speed to cause the buffer to flow into and fill the first flow path by centrifugal force, and V does not reach the quantitative portion in the second flow path.
- the biological sample is caused to flow to the inflow position, and the sample injection portion of the second flow path is pressurized to move the biological sample in the second flow path from the first inflow position to the second flow path.
- the plate After flowing into the second inflow position including the quantitative portion of the flow path and filling
- the plate After flowing into the second inflow position including the quantitative portion of the flow path and filling
- the plate is rotated at a high speed, and the biological sample in the second flow path is separated by a centrifugal force so that a certain amount of the biological sample remains in the quantitative section of the second flow path.
- the temperature of the passage is set to a constant temperature, a fixed amount of the biological sample held in the quantitative section is moved in the buffer, and the biological sample moving in the buffer is determined.
- the filling process of the buffer into the flow path can be realized by the centrifugal force
- the filling process of the biological sample can be realized by the pressure difference generated in the flow path
- a certain amount of the biological sample is contained in the buffer. Since the quantitative addition process for adding the sample can be realized by centrifugal force, as in the above, complicated preparation work is not required, and an accurate determination result can be obtained in a short time.
- the first flow path into which the buffer is injected in the biological sample determination method according to claim 23, the first flow path into which the buffer is injected; A flow path pattern having the second flow path into which the biological sample is injected, and an air hole communicating with the sample injection part into which the biological sample is injected at V in the second flow path.
- the formed plate is rotated at high speed, and the first flow path is centrifuged. V, which does not reach the quantification section in the second flow path, and the biological sample is flowed to a first flow-in position, and the sample is injected into the second flow path.
- the biological sample in the second flow path was flowed from the first flow-in position to a second flow-in position including the quantitative portion of the second flow path, and filled. Thereafter, the biological sample in the second flow path is separated from the air flow port of the second flow path by suctioning the air sample from the air hole, so that a fixed amount of the biological sample remains in the quantitative section of the second flow path. After the first flow path is brought to a constant temperature, a fixed amount of the biological sample held in the quantitative section is moved in the buffer, and the biological sample moving in the buffer is determined. It is.
- the filling process of the buffer into the flow channel can be realized by centrifugal force, and the filling process of the biological sample into the flow channel and the quantitative addition process of adding a certain amount of the biological sample to the buffer are performed. Since this can be realized by the pressure difference in the flow path, as in the above, a complicated sample preparation operation is not required, and a biological sample discriminating apparatus capable of obtaining an accurate discrimination result in a shorter time can be provided.
- the biological sample discriminating plate according to claim 26 of the present invention is a plate for discriminating a biological sample, and for injecting a buffer reacting with the biological sample into the plate.
- a buffer injection section a first flow path connected to the buffer injection section, a sample injection section for injecting the biological sample into the plate, and a second flow path connected to the sample injection section.
- a second flow path wherein the second flow path includes a quantification unit that holds a fixed amount of a biological sample to be supplied to the first flow path in a part of the flow path.
- the first flow path and the second flow path are connected via the quantitative section.
- the biological sample determination plate according to claim 27 of the present invention is the biological sample determination plate according to claim 26, wherein the first flow path and the second flow path are the same. It comes into contact in parallel via the metering unit.
- the biological sample discriminating plate according to claim 28 of the present invention is the biological sample discriminating plate according to claim 26, wherein positive and negative electrode portions or negative electrode portions are provided in the first flow path.
- the first and second electrode insertion portions into which the positive electrode and the negative electrode are inserted are provided.
- a certain amount of the biological sample added to the buffer can be electrophoresed in the buffer.
- the biological sample discriminating plate according to claim 29 of the present invention is the same as the biological sample discriminating plate according to claim 26, except that the buffer injection part is connected to the first channel. And air holes communicating with the sample injection section are provided in the second flow path.
- the buffer can be filled from both ends of the first flow path, so that the buffer can be filled in a short time without biting air bubbles in the first flow path.
- the biological sample determination plate according to claim 30 of the present invention is the biological sample determination plate according to claim 26, wherein the buffer is injected into the buffer injection section, and the sample injection is performed. After injecting the biological sample into the portion, in a first step, a buffer injected from the buffer injecting portion is filled in a first flow path, and in a second step, the sample is injected. After the biological sample injected from the part is filled in the second flow path including the quantification part, in a third step, the biological sample in the second flow path is separated and the biological sample is separated. Is left in the quantitative section, and in the fourth step, the remaining fixed amount of the biological sample is moved in the buffer in the first flow path.
- the biological sample determination plate according to claim 31 of the present invention is the biological sample determination plate according to claim 30, wherein the first step is performed by pressurizing, suctioning or capillary action.
- the first step is performed by pressurizing, suctioning or capillary action.
- the second step is performed by pressurizing, suctioning or capillary action.
- the biological sample is filled in the second flow path including the quantitative section.
- the second flow path can be easily and quickly filled with the biological sample.
- the biological sample discriminating plate according to claim 33 of the present invention is a biological sample discriminating plate for detecting a biological sample moving in a buffer and discriminating the biological sample.
- a biological sample discriminating plate for detecting a biological sample moving in a buffer and discriminating the biological sample.
- the biological sample discriminating plate according to claim 34 of the present invention is the biological sample discriminating plate according to claim 33, wherein a part of the first flow path includes a negative electrode and a positive electrode. Are provided with the first and second electrode insertion portions into which are inserted.
- the biological sample discriminating plate according to claim 35 of the present invention is the biological sample discriminating plate according to claim 33, wherein the first flow path is formed of the biological sample discriminating plate.
- An inner peripheral flow path which is an inner peripheral side of an arc-shaped flow path extending in a circumferential direction of a circle having a center as a center, an outer peripheral flow path which is on an outer peripheral side, and both of the inner peripheral flow path and the outer peripheral flow path.
- a radial flow path extending in the radial direction from the center of the circle connecting the ends; and a flow path having a circular shape.
- the second flow path includes the arc-shaped flow path located between the inner circumferential flow path and the outer circumferential flow path. And a U-shaped flow path provided in a part of the arc-shaped flow path.
- the quantitative section includes a part of the outer peripheral flow path and the U-shaped shape of the second flow path. And a part of the flow path in parallel.
- the biological sample is filled in the second flow path without containing air bubbles.
- the quantification unit can add a biological sample to the buffer filled in the first flow path.
- the biological sample determination plate according to claim 36 of the present invention is the biological sample determination plate according to claim 35, wherein the buffer is injected and communicates with the first channel.
- the buffer injection section is located on the inner peripheral side of the first flow path.
- the buffer added to the buffer injection section can be reliably filled in the first flow path in a short time by the centrifugal force.
- the biological sample discriminating plate according to claim 37 of the present invention is the biological sample discriminating plate according to claim 35, wherein the biological sample is injected and communicates with the second channel.
- the sample injection section is located on the inner peripheral side of the second flow path.
- the biological sample added to the sample injecting section can be caused to flow into the second flow path in a short time without containing bubbles by the centrifugal force.
- the biological sample discriminating plate according to claim 38 of the present invention is the biological sample discriminating plate according to claim 34, wherein the first and second electrode insertion portions are the first electrode inserting portion. In a part of the radiation channel.
- the biological sample determination plate according to claim 39 of the present invention is the biological sample determination plate according to claim 35, wherein the plate is provided substantially at the center of the inner peripheral flow path of the first flow path.
- a buffer injection section for injecting the buffer is provided.
- the biological sample discriminating plate according to claim 40 of the present invention is the same as the biological sample discriminating plate according to claim 35, except that the buffer is filled in the first channel. At this time, the buffer is filled in the outer peripheral flow path and the first and second electrode insertion portions of the first flow path.
- the biological sample added to the buffer filled in the first flow path can be reliably electrophoresed, and an accurate discrimination result can be obtained.
- the biological sample discriminating plate according to claim 41 of the present invention is the biological sample discriminating plate according to claim 35, wherein the arc-shaped channel of the inner peripheral channel is an arc-shaped channel. And on an elliptical arc slightly shifted toward the outer peripheral flow path.
- the biological sample determination plate according to claim 42 of the present invention is the biological sample determination plate according to claim 35, wherein the flow path width of the inner peripheral flow path is the flow path width of the outer peripheral flow path. It is wider.
- the time from when the buffer is injected into the first flow channel to when it reaches the first and second electrode insertion portions can be shortened, so that the air in the flow channel can be efficiently removed.
- the time until the buffer is filled in the first flow path can be further reduced.
- the biological sample discriminating plate according to claim 43 of the present invention is the biological sample discriminating plate according to claim 35, wherein the outer peripheral flow path is provided from the first electrode insertion section to the quantitative determination. And a flow path length adjusting section that adjusts a difference between a length of the flow path to the section and a length of the flow path from the second electrode insertion section to the fixed amount section.
- the length from the first electrode insertion portion to the fixed portion can be made substantially the same as the length from the second electrode insertion portion to the fixed portion. Can be prevented from being included.
- the biological sample is injected into one end of the second channel. A sample injecting section is provided, and the other end is provided with a sample pool for holding the biological sample into which the force of the sample injecting section has been injected when filling the second flow path with the biological sample.
- the biological sample discriminating plate according to claim 45 of the present invention is the biological sample discriminating plate according to claim 28 or 34, wherein the plate is provided above the first flow path.
- a heater for heating the first channel and a thermistor for measuring the temperature of the first channel are provided, and a positive electrode and a negative electrode are provided in the first and second electrode insertion portions.
- the biological sample discriminating plate according to claim 46 of the present invention is the biological sample discriminating plate according to claim 28 or claim 34, wherein the first and second electrode insertion portions are different from each other. , Air holes.
- the biological sample determination plate according to claim 47 of the present invention is the biological sample determination plate according to claim 44, wherein the sample pool has an air hole.
- the biological sample determination plate according to claim 48 of the present invention is the biological sample determination plate according to claim 26 or 33, wherein the biological sample is A DNA sample, wherein the buffer is a DNA conjugate for separation comprising a linear polymer in which a base sequence capable of hydrogen bonding is bound to the target DNA to be detected contained in the DNA sample; and a DNA binding control agent. And a pH buffer.
- the biological sample determination plate according to claim 49 of the present invention is the biological sample determination plate according to claim 28 or 34, wherein the first and second electrode insertion portions are provided. And an electrode insertion port for inserting the positive electrode and the negative electrode, and a cover film is attached to the electrode insertion port.
- the buffer can be prevented from spilling out from the electrode insertion hole.
- the biological sample determination plate according to claim 50 of the present invention is the biological sample determination plate according to claim 26 or 33, wherein the biological sample determination plate is the biological sample determination plate.
- a plurality of the flow path patterns are formed.
- the biological sample discriminating plate according to claim 51 of the present invention is the same as the biological sample discriminating plate according to claim 28 or claim 34. Providing a washing area for washing the positive electrode and the negative electrode, washing the positive electrode and the negative electrode in the washing area, and then inserting the positive electrode and the negative electrode into the first flow path. .
- the biological sample discriminating plate according to claim 52 of the present invention is the biological sample discriminating plate according to claim 28 or claim 34, wherein the buffer injecting section is formed by the second It is provided at both ends of one flow path, and the buffer injection part is also used as the electrode part or the electrode insertion part.
- the shape of the flow path pattern can be simplified, and the entirety of one flow path pattern can be reduced. Since the body shape can be made compact, a plurality of flow path patterns can be formed on the plate.
- the biological sample determination plate according to claim 53 of the present invention is the biological sample determination plate according to claim 26 or 33, wherein the first flow path and the second flow path are different from each other.
- the flow path is formed by a groove formed on the plate surface and a film covering the plate surface.
- a closed channel can be formed with a simple configuration, and thus a channel pattern can be easily formed on the plate.
- the biological sample determination plate according to claim 54 of the present invention is the biological sample determination plate according to claim 26 or 33, wherein the first flow path and the second channel are different from each other.
- the channel is formed on the same surface of the plate.
- the biological sample determination plate according to claim 55 of the present invention is the biological sample determination plate according to claim 26 or 33, wherein the first flow path and the second flow path are different from each other.
- the channel is formed on the same surface of the plate.
- the first flow path into which the buffer is introduced, and the first flow path and a part of the flow path are provided in a part of the flow path.
- the second flow path of the second flow path A filling pipe for adding a certain amount of a biological sample to the buffer while leaving a certain amount of the biological sample in the quantification part, and a certain amount of the biological sample held in the quantification part are mixed in the buffer. And a determination unit for determining the biological sample moving in the buffer.
- a filling unit is provided below the apparatus, a discriminating unit is provided above the apparatus, and an elevating stage for moving a plate between the filling unit and the discriminating unit is provided.
- the biological sample discriminating apparatus can be compact and lightweight.
- the filling unit includes a motor that rotates the plate at a high speed
- the discrimination unit includes a pressure operation unit that generates a pressure difference in the second flow path.
- the agent and the biological sample can be reliably filled in the second flow path, and a fixed amount of the biological sample can be quantified and added to the buffer.
- the discrimination unit includes a positive electrode and a negative electrode, a certain amount of a biological sample added to the buffer can be moved by electrophoresis.
- an optical detection unit for detecting the fluorescence or the absorbance is provided, and the first flow path is scanned to detect the moving state of the biological sample moving in the buffer, thereby determining the biological sample. , It is possible to easily obtain an accurate determination result in a short time.
- the first flow path into which the buffer flows, and the first flow path and a part of the flow path are provided in a part of the flow path.
- the flow path pattern formed on the plate is such that the buffer is injected into a part of the flow path pattern, and the biological sample determination plate is rotated at a high speed. Then, the biological sample is injected into a part of the first flow path filled with the buffer, and the biological sample is centrifugally distributed by rotating the biological sample discriminating plate at a high speed.
- the first flow path is filled with the biological sample And a second flow path that shares a part of the flow path, so that the biological sample discriminating apparatus can be reduced in size, weight, and cost, and can be complicated. There is an effect that a biological sample can be discriminated accurately and in a short time without any work.
- FIG. 1 is a diagram showing a configuration of a biological sample discriminating apparatus according to a first embodiment of the present invention.
- FIG. 2 (a) is a detailed diagram showing a configuration example around a cooling fan of the biological sample discriminating apparatus according to the first embodiment of the present invention.
- FIG. 2 (b) is a detailed diagram showing another configuration example around the cooling fan of the biological sample discriminating apparatus according to the first embodiment of the present invention.
- FIG. 3 (a) is a diagram showing an upper surface of the plate according to the first embodiment of the present invention.
- FIG. 3 (b) is a diagram showing the lower surface of the plate according to the first embodiment of the present invention.
- FIG. 3 (c) is a diagram showing an AA cross section of the plate according to the first embodiment of the present invention.
- FIG. 4 is a view showing a pattern formed on the plate according to the first embodiment of the present invention.
- FIG. 5 is a flowchart showing a series of operations of the biological sample discriminating apparatus according to the first embodiment of the present invention.
- FIG. 6 (a) is a diagram when a sample is injected into a pattern formed on a plate according to the first embodiment of the present invention.
- FIG. 6 (b) is a diagram at the time when a conjugate filling process is performed on the pattern formed on the plate according to the first embodiment of the present invention.
- FIG. 6 (c) is a diagram after a conjugate filling process has been performed on the pattern formed on the plate according to the first embodiment of the present invention.
- FIG. 6 (d) is a diagram after a pressure treatment is performed on the pattern formed on the plate according to the first embodiment of the present invention.
- FIG. 6 (e) is a view showing a pattern formed on the plate according to the first embodiment of the present invention after a quantitative addition process.
- FIG. 7 (a)] is a diagram showing the position of the first cross section of the lifting stage of the biological sample discriminating apparatus according to the first embodiment of the present invention.
- FIG. 7 (b) is a diagram showing the biological sample discriminating apparatus according to the first embodiment of the present invention in which the lifting stage is moving from the position of the first section to the position of the second stage. is there.
- FIG. 7 (c) is a view showing the biological sample discriminating apparatus according to the first embodiment of the present invention in which the lifting stage is moving from the position of the first cross section to the position of the second stage. is there.
- FIG. 7 (d) is a diagram showing the position of the second stage of the lifting stage of the biological sample discriminating apparatus according to the first embodiment of the present invention.
- FIG. 8 is a diagram showing a signal of a plate alignment position detection sensor force of the biological sample discriminating apparatus according to the first embodiment.
- FIG. 9 is a diagram illustrating features of a pattern formed on a plate according to the first embodiment of the present invention.
- FIG. 10 (a) is a diagram showing an example of a positional relationship between a thermistor and a heater in the biological sample discriminating apparatus according to the first embodiment of the present invention.
- FIG. 10 (b) is a diagram showing another example of the positional relationship between the thermistor and the heater in the biological sample determination device according to the first embodiment of the present invention.
- FIG. 11 shows a DNA conduit in which a DNA sample is filled in a second channel formed in a plate according to the first embodiment of the present invention, and the DNA sample is filled in the first channel.
- FIG. 4 is a diagram showing a state of moving in a ligating solution.
- FIG. 12 is a diagram showing a result of measuring the absorbance of a DNA sample in the biological sample discriminating apparatus according to the first embodiment of the present invention.
- FIG. 13 is a diagram for explaining the principle of the biological sample discriminating apparatus according to the first embodiment of the present invention.
- FIG. 14 is a diagram showing a lower surface in a case where four patterns are provided on the plate according to the first embodiment of the present invention.
- FIG. 15 is a diagram showing a configuration of the biological sample discriminating apparatus according to the second embodiment of the present invention.
- FIG. 16 is a sectional view of a plate according to a second embodiment of the present invention.
- FIG. 17 is a diagram showing another configuration of the biological sample discriminating apparatus according to the second embodiment of the present invention.
- FIG. 18 is a cross-sectional view showing another configuration of the plate according to the second embodiment of the present invention.
- FIG. 19 is a sectional view showing an example of a plate according to a third embodiment of the present invention.
- FIG. 20 is a cross-sectional view showing another example of the plate according to the third embodiment of the present invention. [21] FIG. FIG. 20
- FIG. 22 (a) is a diagram illustrating an example of a configuration of an optical detection unit of a biological sample determination device according to a fourth embodiment of the present invention.
- FIG. 22 (b)] is a diagram showing another example of the configuration of the optical detection unit of the biological sample determination device according to the fourth embodiment of the present invention.
- FIG. 22 (c) is a diagram showing another example of the configuration of the optical detection unit of the biological sample determination device according to the fourth embodiment of the present invention.
- FIG. 23 (a) is a diagram showing a sample injection surface of a biological sample discriminating plate according to a fifth embodiment of the present invention.
- FIG. 23 (b) is a diagram showing a flow channel generation surface of the biological sample determination plate according to the fifth embodiment of the present invention.
- FIG. 24 is a diagram showing an example of a pattern formed on the biological sample determination plate according to the fifth embodiment of the present invention.
- the present invention realizes a biological sample discriminating apparatus that performs biological, enzymatic, immunological, and chemical assays by moving a biological sample in a buffer, and is small, light, and inexpensive. Is what you do.
- the biological sample is a DNA sample
- the buffer is a DNA conjugate such as MgCl on the DNA conjugate for separation.
- the DNA conjugate solution contains a pH controlling agent and a pH buffering agent which also functions as an electrolyte.
- the present biological sample discriminating apparatus has a predetermined amount of the DNA sample added to the DNA conjugate solution. Electrophoresis to determine the presence or absence of SNPs (base polymorphism) in the DNA sample.
- FIG. 1 is a configuration diagram of the biological sample discriminating apparatus according to the first embodiment.
- the biological sample discriminating apparatus 100 As shown in FIG. 1, the biological sample discriminating apparatus 100 according to the first embodiment A filling unit 20 for filling the DNA conjugate solution into the flow path formed in the flow path 10 and quantitatively adding the DNA sample into the flow path filled with the DNA conjugate solution; The DNA sample is electrophoresed in the DNA conjugate solution by applying pressure, heating, and voltage application, and a discrimination unit 30 for discriminating the presence or absence of SNPs, and the plate is vertically moved by a vertically moving motor 51. And a control board 68 for controlling the operation of the present apparatus 100.
- the present apparatus 100 has a configuration in which an elevating stage 50 is disposed below the apparatus, a filling unit 20 is disposed on the elevating stage 50, and a determination unit 30 is disposed above the elevating stage 50. And the device configuration is more compact.
- the filling unit 20 holds the plate 10 and a high-speed rotation motor 21 that rotates the plate 10 at a high speed, and a part of the plate 10 is fixed in the device 100 and provided in the housing 60.
- the plate holding part 22 for transferring the internal force of the device 100 to the outside or from the outside to the inside
- the plate confirmation sensor 23 for confirming the presence or absence of the plate before the start of the measurement
- pressurizing the flow path for generating a pressure difference in the flow path.
- the discriminating unit 30 includes a fitting pin 31 for fixing the plate 10 to the discriminating unit 30, and positive and negative electrodes 32a and 32b for applying a voltage to a flow path formed in the plate 10.
- a heater 33 for maintaining the flow path at a constant temperature; a positioning mark detection sensor 35 for positioning when fixing the plate 10 and the discrimination unit 30; a clamper 36 for holding the plate 10;
- the thermistor includes a thermistor 34 for detecting the temperature of the flow channel provided in 10 and a low-speed rotation motor 38 for rotating the plate at a low speed.
- the pressurizing unit 24 that is a component of the filling unit 20 is used.
- the pressurizing unit 24 are also installed on a ceiling plate 37 provided above the device.
- the fitting pins 31, the positive and negative electrodes 32a and 32b, the heater 33, the thermistor 34, the clamper 36, and the pressurizing section 24 installed on the ceiling plate 37 have appropriate tension with respect to the plate 10.
- a panel is provided so that the spring can be pressed against the plate 10 by the spring. It is made.
- the fluorescence or absorbance of the DNA sample moving in the DNA conjugate solution is determined.
- An optical detection unit 40 for detection is provided, and the detection result of the optical detection unit 40 is used to determine the migration state of the DNA sample in the DNA conjugate solution, and the presence or absence of SNPs in the DNA sample is determined based on the determination result. I do.
- the optical detection unit 40 is provided on the elevating stage 50.
- the heater 33 is provided with a heater temperature detection sensor 55 for detecting the temperature of the heater
- the apparatus 100 is provided with an internal temperature detection sensor 54 for detecting the temperature inside the apparatus. ing.
- the biological sample discriminating apparatus 100 includes an in-apparatus temperature detection sensor 54 for detecting the temperature in the apparatus, a pressurizing pump 52 connected to the pressurizing section 24 via a pump tube 53, A high voltage power supply 66 and a device power supply 67 are provided.
- a power switch 62 for switching the device 100 on and off, an LED 63 illuminated when the power switch 62 is in the SON state, a cooling fan 64 for cooling the inside of the device 100, and a device Rubber feet 65a, 65b are provided to protect the device 100 from vibration and to be adjustable in height.
- the cooling fan 64 provided in the device 100 is capable of taking in external air into the interior, and performs cooling by releasing the internal rising air to the exterior.
- the biological sample discriminating apparatus 100 obtains a detection result by detecting the intensity of light on the plate in the optical detection unit 40, it is necessary to prevent light from entering the inside of the apparatus 100. Therefore, in the first embodiment, the cooling fan 64 is provided with a light blocking section so that air can pass through and light cannot pass through.
- FIG. 2 is a cross-sectional view showing a configuration example of the light blocking unit.
- the light blocking section As a first example of the light blocking section, as shown in FIG. 2A, a crank shape that blocks light but allows air to sufficiently pass inside a housing 60 to which a cooling fan 64 is attached is shown.
- a light source as shown in FIG. 2 (b) is provided inside the housing 60 to which the cooling fan 64 is attached.
- a filter 69b that does not transmit light but allows air to transmit.
- the material of the filter 69b is a porous filter. Examples include materials having a porous structure in which several lums are stacked or microscopic pores are connected by a communication tube.
- FIG. 3 (a) is a top view of the plate in the first embodiment
- FIG. 3 (b) is a bottom view of the plate
- FIG. 3 (c) is a view showing a cross section taken along line A-A of FIG. 4
- FIG. FIG. 9 is a diagram showing a detailed shape of a pattern obtained.
- the plate 10 according to the first embodiment is provided with an opening 10a at the center thereof, which is used for joining the motor 10 when rotating the play 10.
- a fitting pin hole 11 into which a fitting pin 31 provided on a ceiling plate 37 in the biological sample discriminating apparatus 100 shown in FIG. 1 is inserted is provided.
- a mark 13 is provided, and on the upper surface of the plate 10, as shown in FIG. 3 (a), a positioning mark 12 detected by the positioning mark detection sensor 35, and a DNA conjugate solution or sample.
- Injection ports 123 and 124 for injecting DNA samples, electrode inlets 121 and 122 for inserting the electrodes 32a and 32b, air holes 131, 132, and 135 are provided.
- a cavity seal 14 is placed so as to cover the flow path pattern 110 formed on the plate 10, and A cover film 15 is provided on the upper surface of the sheet 10 so as to cover only the electrode ⁇ entrance.
- the cavernous seal 14 is preferably transparent because the optical detector 40 needs to measure the absorbance or the fluorescence of the DNA conjugate solution in the flow path.
- the flow path pattern 110 includes a first flow path 116 filled with a DNA conjugate solution, and a second flow path 117 filled with a DNA sample.
- the first flow path 116 The inner surface of the plate has an inner peripheral passage 116a and an outer peripheral passage 116b, which is an outer peripheral passage.
- the channel pattern 110 is a DNA conduit for separating a DNA sample, which is located on the inner peripheral side of the plate 10 with respect to the inner peripheral channel 116a.
- Injection part 113 into which the DNA sample is injected a buffer injection part 113 into which the sample solution is injected, a sample injection part 114 which is located on the inner peripheral side of the plate 10 with respect to the second flow path 117 and into which the DNA sample is injected.
- An insertion portion 112 is provided.
- the inner flow path 116a of the first flow path 116 connects between the buffer injection section 113 and the first electrode insertion section 111, and connects between the buffer injection section 113 and the second electrode insertion section 112.
- the path 116b connects between the first electrode insertion part 111 and the second electrode insertion part 112.
- the second flow path 117 connects the second electrode insertion portion 112 and the sample pool 115, and a part of the second flow path 117 is shared with a part of the first flow path 116.
- a quantitative section 117a for holding a fixed amount of a DNA sample to be added to the DNA conjugate solution filled in the first flow path 116.
- the fluorescence of the migration channel is detected by the optical detection unit 40
- the efficiency of detecting the fluorescence is poor.
- Preferably shallow For example, a flow path having a width of 300 m and a depth of 50 m is exemplified.
- the absorbance of the electrophoresis flow path is detected by the optical detection unit 40, it is difficult to detect the absorbance if the depth of the electrophoresis flow path is too shallow, so the flow path preferably has an appropriate depth.
- a flow path having a width of 3 m and a depth of 300 m is exemplified.
- the flow path pattern 110 includes first and second electrode standby holes 118 and 119 for waiting the electrodes 32a and 32b when not in measurement.
- a pressurization standby hole 136 provided on the concentric circle of the insertion portions 111 and 112 and for holding the pressurizing portion 24 when not pressurized by the pressurizing portion 24 is provided on the concentric circle of the sample injection portion 114. It is provided.
- the first and second electrode inserts 11, 112 are provided with electrode inlets 121, 122 for inserting the negative electrode 32a and the positive electrode 32b, respectively, and air holes 131, 132.
- the injection ports 123 and 124 are provided in the powder injection section 113 and the sample injection section 1114, respectively.
- the sample pool 115 is provided with an air hole 135.
- FIG. 5 is a flowchart showing a series of operations of the biological sample determination device according to the first embodiment.
- Step S1 First, a DNA sample serving as a specimen and a DNA conjugate solution are prepared, and the flow path provided on the plate 10 as shown in FIG.
- the DNA conjugate solution Dc is injected from the injection port 123 into the buffer injection section 113 of the pattern 110, and the DNA sample Ds is injected from the injection port 124 into the sample injection section 114.
- a single-stranded DNA having a length of about 60 bases and including a SNPs site to be discriminated is prepared as a DNA sample.
- the method for extracting DNA and single-stranded DNA are not directly related to the present invention, and therefore, detailed description is omitted.
- the DNA conjugate solution has properties including a DNA conjugate for separation, a pH buffering agent also serving as an electrolyte, and a DNA binding force controlling agent such as MgCl.
- the DNA conjugate for separation is obtained by covalently binding a polymer linear polymer to the 5 'end of a 6- to 12-mer single-stranded DNA, and the single-stranded DNA is to be discriminated. It contains a sequence that is not complementary to a force variant that is complementary to a normal form of DNA containing the SNP s site.
- the DNA conjugate solution has a property of weak binding to mutant DNA, which has strong binding to normal DNA.
- this DNA conjugate solution has a characteristic that when electrophoresed, a linear polymer bound to the 5 'end becomes a weight, and the electrophoresis speed is considerably slow.
- the DNA conjugate for separation is first prepared with a base complementary to the base sequence of the DNA sample.
- the 5 'end of the DNA having the sequence is aminated (usually aminated through a hexyl group), and sterilized ultrapure water is diluted to 2.6 mM by diluting the mixture.
- MOSU methacryloy-doxysuccinimide
- DMSO dimethyl sulfoxide
- a solution prepared by adjusting the pH of the adjusted solution with sodium hydrogencarbonate and sodium hydroxide to pH 9 for pH adjustment is added in the same amount as the amount of aminoamide DNA.
- the solution obtained as described above is shaken overnight, and then, by using HP LC (High Performance Liquid Chromatography), the vulylated DNA in the shaken solution is removed. Separates from aminated DNA, MOSU and others. Since the vinylated DNA contains an eluent (TEAA; a mixed solution of triethylamine monoacetic acid and acetonitrile), it is further concentrated under reduced pressure using a centrifugal evaporator having a vacuum drying function.
- TEAA a mixed solution of triethylamine monoacetic acid and acetonitrile
- TEMD N, N, N'N'-tetramethylethylenediamine
- APS ammonium persulfate
- the AAM was 34 ⁇ l, the TEMD and the APS were 5 ⁇ 1 each, and the buried DNA was 0.01% relative to the AAM.
- Molar to 0.05% mol add sterile ultrapure water to 1001 and leave it for about 60 minutes to obtain acrylamidated DNA conjugate for separation.
- a pH buffer and a DNA binding regulator are added to the thus obtained DNA conjugate for separation to prepare a DNA conjugate solution.
- the DNA sample and the DNA conjugate solution are quantified by a pipettor or the like, using the DNA injection part 124 of the plate 10 or the buffer solution. Dispense into the injection part 123.
- the volume to be dispensed depends on the scale of the flow path pattern. For example, here, the DNA conjugate solution is 18 microliters and the DNA sample is 2 microliters.
- Step S2 the DNA connector is After injecting a solution or a DNA sample, the power switch 62 of the device 100 is turned on, and an operation button (not shown) or the like is operated. The plate 10 into which the DNA conjugate solution Dc and the DNA sample Ds have been injected is set on the plate holder 22. Then, the operation button is operated again to perform plate loading for pulling the plate holding portion 22 into the housing 60. When the plate holding portion 22 is retracted by the operation of step S2, the plate 10 is automatically set to a position where the opening 10a fits into the plate receiving portion 21a of the high-speed rotating motor 21. The position of the lifting stage 50 in this state is defined as the lowest point.
- Step S3 As described above, at the same time that the plate 10 is loaded into the biological sample discriminating apparatus 100, the elevating stage 50 moves the plate 10 from the lowest point by the vertical motor 51 from the clamp point. It rises to the first stage position, which is the position held by 36. At this time, together with the elevating stage 50, the optical detection unit 40, the high-speed rotation motor 21, the plate confirmation sensor 23, and the plate 10 fitted in the plate receiving portion 21a of the high-speed rotation motor 21 increase the force of the plate holder 22 Does not move because it is fixed to the device. As a result, the plate 10 can be fixed to a motor or the like in the apparatus with the center of gravity of the plate as the center.
- FIG. 7 (a) is a diagram showing a state in which the elevating stage of the biological sample discriminating apparatus according to the first embodiment has moved up to the position of the first stage.
- the lifting stage 50 starts to rise from the lowest point by the vertical movement motor 51, and as shown in FIG.
- the opening 10a of the plate 10 fits into the plate receiving portion 21a.
- the lifting stage 50 is further raised, and the plate 10 is raised together with the high-speed rotation motor 21.
- the elevating stage 50 is raised to a certain position, the magnet provided on the lower surface of the clamper 36 above the plate 10 and the plate receiving portion 21a formed of metal of the high-speed rotating motor 21 are moved. Are connected and thereby held by the plate 10 force S clamper 36.
- the elevating stage 50 stops, and this stop position force is the position of the first stage of the elevating stage 50.
- the first stage position of the lift stage 50 is, for example, a position where the lowest point force of the lift stage 50 is increased by 8 mm. is there.
- Step S4 Step S5
- the filling unit 20 performs the first stage operation at the first stage position.
- a filling process for filling the flow channel 116 with the DNA conjugate solution is performed.
- the plate confirmation mark 13 of the plate 10 includes a notch, a mark, or the like.
- an aluminum tape is applied here.
- the plate confirmation sensor 23 such as a reflection type photo sensor.
- the plate confirmation sensor 23 generates a difference between the output signal as shown in FIG. 8 between the aluminum tape which is the plate confirmation mark 13 and a portion other than the aluminum tape, so that the output signal has a rising edge and a falling edge. If plate 10 exists, on the other hand, if there is no rise and fall in the output signal, it is determined that plate 10 does not exist.
- the plate confirmation sensor 23 determines that the plate 10 does not exist, the operation is stopped at this point. On the other hand, if it is determined that the plate 10 exists, for example, the high-speed rotating motor 21 of the filling unit 20 is used. Is rotated at a predetermined number of revolutions, here, for example, about 4000 rpm at a high speed for about 112 minutes to fill the first flow path 116 of the flow path pattern with the DNA conjugate solution.
- the DNA conjugate solution injected into the buffer injection portion 113 in the flow channel pattern 110 is moved from the buffer injection section 113 to the first and second flow paths, respectively. It reaches the electrode insertion portions 111 and 112 of No. 2. Further, the outer peripheral flow path 116b of the first flow path 116 is further moved from the first and second electrode insertion portions 11 and 112, and finally, as shown in FIG. 6 (c).
- the second electrode insertion portions 111 and 112 and the outer peripheral channel 116b are filled.
- This D The NA conjugate solution originally exists in the outer peripheral channel 116b, and since the air is discharged from the air holes 135 of the sample pool 115, the NA conjugate solution is smoothly filled into the outer peripheral channel 116b.
- the inner circulating channel 116a of the first channel 116 is prevented from being filled with the DNA conjugate solution by the first and second electrodes. This is to prevent electrophoresis from being performed on the inner peripheral channel 116a side when an electrode is inserted into the insertion sections 111 and 112 and a voltage is applied. Therefore, in step S1, the amount of the DNA conjugate solution to be injected into the buffer injection section 113 is preferably such that the DNA conjugate solution does not remain in the inner peripheral channel 116a after the conjugate filling treatment. Further, in a step described later, it is necessary to allow the DNA sample to flow into the quantitative section 117a which shares the outer peripheral flow path 116b and a part of the flow path.
- the amount of the DNA conjugate solution to be injected into the buffer injection section 113 needs to be such that the flow path of the quantification section 117a is not filled with the DNA conjugate solution.
- FIG. As shown in (4), it is preferable that the amount be less than half the height of the flow path of the quantification unit 117a. This is because if the amount of the DNA conjugate solution exceeds more than half of the height of the flow path of the quantification section 117a, there is a problem that the DNA conjugate solution overflows in the direction of the second flow path 117. is there.
- the amount of the DNA conjugate solution is about 18 microliters.
- the DNA sample injected into the sample injection section 114 flows through the second flow path 117 by the centrifugal force of the filling unit 20 during the conjugate filling processing by the filling unit 20 as described above. It moves in the circumferential direction and is distributed in a part of the second channel 117.
- the aerodynamic force originally present in the outer peripheral flow path 116b or the second flow path 117 is discharged from the air hole 135 of the sample pool 115, so that the second flow path 1 17 Is distributed smoothly in a part of.
- the DNA conjugate solution is placed in the outer peripheral channel 116b of the first channel 116 in the conjugate filling process by the filling unit 20.
- the DNA sample flows into the quantification section 117a, and as a result, the DNA sample also flows into the outer peripheral channel 116b. Therefore, the amount of the DNA sample injected into the sample injection section 114 is remote.
- the amount that does not reach the outer peripheral flow path 116b due to the force of the heart that is, as shown in FIGS. 6B and 6C, in the middle of the second flow path 117, specifically, at a position that does not reach the quantitative section (hereinafter , Referred to as the “first inflow position”.) Inject the amount that stops moving at E1.
- the amount of the DNA sample that fills the entire second flow path 117 is not necessary, as long as there is a part that fills the second flow path 117, that is, the amount that fills the quantitative section 117a. Therefore, a small amount is sufficient.
- the amount of the DNA sample may be about 2 microliter.
- FIG. 9 is a diagram showing an example of the flow path pattern formed on the plate according to the first embodiment.
- the flow path pattern 110 of the first embodiment contains the DNA conjugate solution and the DNA sample when injecting and filling the DNA sample, or when quantifying the DNA sample, or when quantifying the DNA conjugate solution.
- various measures are taken so that no bubbles are contained in the outer peripheral channel 116b.
- the first feature of the flow channel pattern 110 is the shape of the buffer injection section 113 and the position where the buffer injection section 113 is located.
- the buffer injection section 113 is located on the inner peripheral side of the first flow path 116, and the outlet thereof is branched into two.
- the conjugate solution is branched and moved to both ends of the inner peripheral channel 116a.
- the DNA conjugate solution is branched into two at the outlet of the buffer injection part 113 by centrifugal force to the outer peripheral side generated by the high-speed rotation of the plate 10 when injected. It moves smoothly in a short time toward both ends of the peripheral flow passage 116a, passes through the first and second electrode insertion portions 111 and 112, and is filled from both ends of the outer peripheral flow passage 116b.
- buffer injection parts are provided at both ends of the first flow path, so that the DNA conjugate solution is injected at two places. The same effect can be obtained even if the same is performed.
- the buffer injection section 113 is provided at one location on the inner peripheral channel 116a side, and the outlet of the buffer injection section 113 has a shape that branches into two. This eliminates the necessity of separately injecting the DNA conjugate solution from both ends of the flow path, so that there is no need to control the injection amount when the buffer is injected into both ends of the first flow path 116. can get. This also eliminates measurement errors caused by controlling the injection timing and injection amount of the DNA conjugate solution.
- the buffer injection section 113 is provided in the first channel 116, it is provided in the center of the inner peripheral channel 116a as shown in FIG. 9, so that the DNA conjugate solution is provided in the outer channel 116b. At the time of filling, it is also possible to prevent the generation of air bubbles in the outer peripheral channel 116b due to the DNA conjugate solution being injected into the first channel 116 with a bias.
- the second feature is the arrangement position of the first and second electrode insertion portions 111 and 112.
- the electrode insertion portions 111 and 112 are provided in a part of the first flow path 116 in the radial direction.
- the electrode insertion portions 111 and 112 are provided in a part of the first flow path 116 in the circumferential direction, the liquid injected into the first flow path 116 moves in the radial direction due to centrifugal force. Therefore, air bubbles may be generated inside each of the electrode insertion portions.
- a third feature is the size of each corner R of the first and second flow paths 116 and 117.
- the curvature of the corners R of the first and second flow paths 116 and 117 of the flow path pattern 110 is all 0.5 or more.
- the fourth feature lies in the shape of the inner peripheral channel 116a.
- the inner circumferential flow path 116a of the first embodiment is an elliptical circle that shifts toward the outer circumferential side as it moves away from the electrode insertion portions 111 and 112 that are not formed in concentric arcs. It is formed in an arc shape. This allows the DNA conjugate solution to be At the time of filling the channel 116, the DNA conjugate solution flowing on the way can be prevented from sticking or bubbles, by the centrifugal force generated by the high-speed rotation of the plate.
- the width of the inner flow path 116a is made larger than that of the outer flow path 116b, the DNA condensers are connected to the first and second electrode inserts 111 and 112 from the buffer agent feeder 113. The ability to move the conjugate solution in a short period of time and improve the escape of air bubbles also has the effect of shortening the filling time of the DNA conjugate solution.
- a fifth feature is the shape of the portion A of the second channel 117.
- the quantification unit 117a included in the second flow path 117 shown in FIG. 9 is configured such that a part of the second flow path 117 is common to a part of the outer flow path 116b.
- a fixed amount of the DNA sample can be quantified, and at the same time, the quantified DNA sample can be added to the DNA conjugate solution filled in the outer peripheral channel 116b.
- the quantitative section 117a in the second flow path 117 is arranged on the inner peripheral side of the plate 10 with respect to the outer peripheral flow path 116b.
- the plate 10 is formed into a substantially U-shape including a radial portion and a circumferential portion, and the U-shaped circumference is formed.
- the aforementioned quantification section 117a is arranged in the direction part so that the DNA conjugate solution and a certain amount of the DNA sample are brought into parallel contact.
- the flow path between the sample pool 115 and the quantification unit 117a in the second flow path 117 is shortened.
- sample injection portion 114 is located on the inner peripheral side of second flow path 117, The injected DNA sample can be smoothly moved to the second flow path in a short time.
- a sixth feature is the shape of the portion B of the outer peripheral channel 116b.
- a bent portion is provided in the portion B of the outer peripheral channel 116b to adjust the length of the outer channel 116b at both ends.
- the flow path length of the outer flow path 116b from the first electrode insertion section 111 to the fixed quantity section 117a and the second electrode insertion section If the length of the flow path from the inlet 112 to the quantification section 117a is extremely different, for example, if the length of the portion B is short, bubbles may be generated in the outer circumferential flow path 116b.
- a seventh feature is that air holes are provided in the first and second electrode inlets 111 and 112 and the sample pool 115, respectively.
- the DNA conjugate solution injected into the buffer injection part 113 can be vented by the air holes 131, 132 provided in the first and second electrode insertion parts 111, 112. This allows the outer peripheral flow path 116b to be filled without bubbles. Further, since the DNA sample filled in the second flow path 116b by the pressurizing process by the pressurizing unit 24 can be evacuated by the air holes 135 provided in the sample pool 115, centrifugal force generated by high-speed rotation causes The distribution area can be separated into the quantification section 117a and other areas, for example, the sample pool 115 and the sample injection section 114. As a result, a fixed amount of the DNA sample can be added to the DNA conjugate solution.
- the eighth feature is that, as shown in Fig. 3 (c), the cover film 15 is attached to the electrode insertion ports 121 and 122 of the first and second electrode insertion sections 111 and 112. is there.
- Step S6 In step S5 described above, the DNA conjugate solution or the DNA sample is injected into the plate 10 having the above characteristics, and after the filling operation of the DNA conjugate solution by the filling unit 20 is completed, The lifting stage 50 is And further rises to fit the disc 10 and the discrimination unit 30 together.
- the fitting pin 31 of the discrimination unit 30 In order to fit the discrimination unit 30 and the plate 10, it is necessary to insert the fitting pin 31 of the discrimination unit 30 into the fitting pin hole 11 of the plate 10. In order to detect the position of the pinning hole 11, the plate 10 needs to be positioned.
- the positioning mark 12 is provided on the upper surface of the plate 10 as shown in Fig. 3 (a), and the positioning mark 12 is detected by the positioning mark detection sensor 35.
- the position where the discrimination unit 30 and the plate 10 can be fitted is determined. If the high-speed rotation motor 21 of the filling unit 20 is a servo-type motor, the position of the plate 10 after the high-speed rotation in the conjugate filling process can be limited, so that it is not necessary to position the plate 10.
- the method of detecting the fitting position by the discriminating unit 30 is the same as the operation in step S4 described above.
- the discrimination unit 30 has many components provided on the ceiling plate 37, and the cables and tubes around the discrimination unit 30. Since they are bundled together (not shown), the cables and tubes are rotated one half turn to 3Z4 turns in order from left and right to prevent the cables and tubes from getting entangled. Is rotated in the direction in which the discrimination unit 30 is less, so that the determination unit 30 is positioned.
- Step S7 After positioning the discrimination unit 30 as described above, in order to fit the plate 10 and the discrimination unit 30, the lifting stage 50 is moved up and down by the vertically moving motor 51 in FIG. It rises from the first stage position shown in (a) to the second stage position shown in FIG. 7 (d).
- the fitting pins 31 of the discrimination unit 30 are inserted into the fitting pin holes 11 of the plate 10 (FIG. 7 (b)), and then the first and second electrodes of the plate 10 are inserted. Electrode insertion holes for parts 111 and 112 12 At 1, 122, the electrodes 32a, 32b of the half IJ ⁇ IJ unit 30 were inserted with the force S, and after the pressurizing portion 24 came into contact with the calo-pressure waiting hole 136 of the plate 10 (FIG. 7 (c)). Then, the heater 33 rises until it contacts the plate 10 (FIG. 7 (d)).
- the position of the elevating stage 50 where the discriminating unit 30 and the plate 10 are fitted is the position of the second stage.
- the position of the second stage of the elevating stage 50 is, for example, a position where the positional force of the first stage is increased by 6.8 mm shown in FIG. 7A.
- the temperature of the outer peripheral channel 116b is measured by the thermistor 34.
- the temperature of the outer peripheral flow path 116b is maintained at a predetermined temperature.
- the reason for setting the temperature of the outer peripheral flow path 116b to a predetermined temperature is that when the optical detector 40 detects absorbance and fluorescence in the flow path, the temperature conditions need to be constant.
- the predetermined temperature may be a constant temperature higher than room temperature. The predetermined temperature is determined according to the DNA conjugate solution to be filled and the DNA sample added to the DNA conjugate solution.
- the DNA sample is 40-60 bases
- the temperature of the outer peripheral channel 116b is preferably 25 ° C to 45 ° C.
- the temperature of the outer peripheral channel 116b is controlled by a thermistor 34 provided on the ceiling plate 37.
- the heater 33 and the thermistor 34 are installed at positions just above the outer peripheral channel 116b and the thermistor 3 with respect to the outer peripheral channel 116b, for example, as shown in FIG. 4 is placed beside the heater 33 and at a position where the distances LI and L2 in the figure are the same, and the heater 33 is pressed directly above the outer peripheral flow passage 116b to perform heating without waste, and the thermistor 34
- the heater 33 may be controlled by measuring the temperature of the heater 10 and estimating the temperature of the outer peripheral flow passage 116b from the measurement result, or as shown in FIG. 10 (b).
- the thermistor 34 is disposed directly above the outer peripheral flow path 116b.
- Accurate temperature The heater 33 may be controlled while measuring the degree. Further, the temperature rise of the heater is measured by a heater temperature detecting sensor (not shown) provided on the heater 33, and the heat transfer amount from the heater 33 to the plate 10 is measured in advance. In advance, the temperature difference between the plate 10 and the heater 33 may be measured to control the temperature of the outer peripheral channel 116b.
- Step S8 After controlling the heater 33 as described above to bring the outer peripheral flow path 116b to a predetermined temperature, the voltage supplied from the high-voltage power supply 66 is applied to the electrodes 32a provided on the ceiling plate 37. , 32b for conjugate purification. At this time, the voltage applied to the outer peripheral flow path 116b may be a force of about 0.5 KV to about 5 KV, preferably 1 KV to 1.5 KV.
- the voltage is applied to the DNA conjugate solution to carry out the conjugate purification treatment because of the inconvenience that occurs when preparing the DNA conjugate solution (the The purpose is to remove the unreacted DNA and low molecular weight conjugates and obtain a pure DNA conjugate solution. Then, the unreacted DNA and the conjugate having a small molecular weight removed at this time move to the second electrode insertion portion 112 where the positive electrode is inserted, and are retained.
- Step S9-Step S12 After the conjugate purification process described above was completed, distribution was performed to the first inflow position E1 of the second flow path 117 in the step S5 by the filling tube 20 in the step S5. The DNA sample is distributed to the second inflow position E2 including the quantification section 117a.
- This processing is performed, for example, by bringing the pressurizing section 24 into contact with the injection port 124 of the sample injection section 114 and applying pressure to the DNA sample held in the sample injection section 114 from the injection port 124.
- the elevation stage 50 in order to bring the position of the pressurizing unit 24 from the pressurizing standby hole 136 at the current position to the injection port 124, the elevation stage 50 is once moved to the second position. Lower the discrimination unit 30 from the position of the stage to the position of the first stage, rotate the discrimination unit 30 slightly by the low-speed rotation motor 38, here about 10 degrees, and then raise the elevating stage 50 to the position of the second stage. . In this way, when the elevating stage 50 is raised to the second stage position and the pressurizing process is performed, the pressurizing section 24 can be brought into contact with the injection port 124 of the sample injection section 114. . At this time, since the electrodes 32a and 32b also rotate at the same time, the electrodes 32a and 32b
- the first and second electrode standby holes 11 provided concentrically with the second electrode insertion portions 111 and 112
- the small DNA sample which has been subjected to the centrifugal distribution in the circumferential direction is moved in the radial direction of the second flow path 117, and a part thereof is transferred to the sample pool 115.
- the DNA sample can be moved to fill the second flow path 117.
- the lifting stage 50 is also lowered to the second stage position (step S13).
- the DNA sample filled in the channel 117 is separated so as to remain in the quantitative section 117a, and a predetermined amount of the DNA sample is centrifugally applied to a part of the outer circumferential channel 116b filled with the DNA conjugate solution. (Step S14).
- the plate 10 is rotated by the high-speed rotation motor 21 of the filling unit 20 at a predetermined number of rotations for a predetermined time, here, about 4000 rpm, for about 10 seconds, as shown in FIG. 6 (d).
- the DNA sample filled in the second flow path 117 between the sample injection part 114 and the sample pool 115 is left only in the quantification part 117a as shown in Fig. 6 (e) due to the centrifugal force generated by the high-speed rotation. .
- the migration state of the DNA sample described above is shown in (1)-(4) in FIG. (1) in FIG. 11 shows the state after the completion of the DNA conjugate solution filling process, and there is no DNA sample in the region filled with the DNA conjugate solution.
- the pressurizing process is performed by the pressurizing unit 24, as shown in (2) in FIG.
- the DNA sample is moved to the sample pool 115, and the DNA sample is filled in the second flow path 117, as shown in (3) in FIG. It is.
- the plate 10 is rotated at a high speed by the high-speed rotation motor 21, the state shown in (4) in FIG. 11 is obtained, and a certain amount of the DNA sample is It comes into contact with the solution in parallel.
- Step S15 Thereafter, in order to perform the measurement operation by the determination unit 30, it is necessary to raise the elevating stage 50 from the position of the first stage to the position of the second stage by the vertically moving motor 51. However, at this time, the positioning mark 12 provided on the upper surface of the plate 10 is detected by the positioning mark detection sensor 35 to perform the positioning of the plate 10 in the same manner as the processing of the step S7. The specific operation at this time is the same as the operation of step S6 described above, and thus the description is omitted.
- Step S16 Step S17
- the elevation stage 50 is raised to the second stage position by the vertical movement motor 51, and the fitting pins 31 of the ceiling plate 37 are moved to the plate 10. And the ceiling plate 37 and the plate 10 are fitted together.
- the heater 33 is inserted into the outer peripheral flow path 116b, and the electrodes 32a and bi are inserted into the electrode insertion holes 112 and 112.
- the outer flow path 116b is heated to a predetermined temperature by the heater 33, and the voltage supplied from the high-voltage power supply 66 is applied to the electrodes 32a and 32b at a voltage of several hundred volts. Electrophoresis is performed in the outer peripheral channel 116b filled with the solution.
- an electric field is generated in the outer flow path 116b and further in the quantification section 117a included in the second flow path 117, and a certain amount of the DNA sample Ds remaining in the quantification section 117a is corrected in the outer flow path 116b.
- Electrophores to the electrode insertion part 112 side of the electrode is performed in which the electrophoretic state of the DNA sample is detected by the optical detection unit 40 using the optical detector 40 to detect the absorbance or the fluorescence of the outer peripheral channel 116b.
- Detection of absorbance or fluorescence by the optical detection unit 40 is performed by rotating the plate 10 fitted with the ceiling plate 37 with respect to the optical detection unit 40 on the elevating stage 50 by the low-speed rotation motor 38.
- the absorbance or the fluorescence of the electrophoresis channel C of the outer peripheral channel 116b is detected at predetermined time intervals, for example, every one minute from the start of measurement. If the second LED (not shown) is turned on at the same time as the voltage is applied to the electrodes 32a and 32b to indicate that the measurement is being performed, the door of the device 100 is erroneously detected during the measurement. 61 can be prevented from being opened.
- the detection of the absorbance or the fluorescence by the optical detection unit 40 is performed by rotating the fitted plate 10 and the ceiling plate 37 about one turn by the low-speed rotating motor 38 and then rotating them in reverse.
- the operation is repeated, and during rotation, the electrophoresis channel C of the outer peripheral channel 116b of the channel pattern 110 is scanned by the optical detection unit 40, and the absorbance or fluorescence of the electrophoresis channel C is detected. Measure the degree.
- the scanning direction of the migration channel C by the optical detection unit 40 is only in the direction in which the DNA sample migrates in the DNA conjugate solution, and not in the opposite direction.
- FIG. 12 is a diagram showing a detection result when the DNA sample in the migration channel C is detected using the absorbance (260 nm) in the biological sample discriminating apparatus of the first embodiment.
- a solution prepared by adding 0.5 mM magnesium chloride as a DNA binding control agent to a 10 mM Tris-Borate buffer and a DNA conjugate for separation (conjugate 5, conjugate 5) was used.
- the horizontal axis represents the distance over which the DNA sample migrates in the swimming channel C in the outer peripheral channel 116b.
- the DNA sample migrates to the right as well as to the left in the graph. That is, the left side in FIG. 12 is the quantitative section 117a side of the swimming path C of the outer peripheral path 116b, and the right side is the positive electrode insertion section 112 side of the swimming path C.
- the vertical axis indicates absorbance, every minute from the top. The time-varying waveform is shown in FIG.
- Fig. 12 shows that one mountain gradually separates into two mountains. From this waveform diagram, it can be determined that substantially the same amounts of normal DNA and mutant DNA are present in the DNA sample that is the specimen.
- the DNA sample contains mutant DNA (normal DNA)! /
- the mutant DNA has a sequence complementary to the mutant DNA, as shown in FIG.
- the electrophoresis speed is lower than that of wild DNA (abnormal DNA) due to the capture by the DNA conjugate.As a result, when the optical detection unit 40 detects the absorbance of the electrophoresis flow path C, as shown in FIG. And the mutant DNA are separated, and two peaks of absorbance appear. On the other hand, if the DNA sample does not contain mutant DNA, only one absorbance peak appears. This makes it possible to determine whether the DNA sample contains the mutant DNA or not.
- the peak on the right side of the graph has a higher migration speed, so that the mutant DNA is normal, and the migration on the left side has a lower migration speed.
- the plate 10 is rotated by the low-speed rotation motor 38 to measure the absorbance of the entire migration channel C of the outer channel 116b. It is also possible to measure the absorbance at one point in the migration channel C of 116b.
- the optical detection unit 40 does not measure the absorbance at one point of the migration channel C.
- the plate 10 is rotated at a low speed by the low-speed rotation motor 38, the entire optical path C is scanned by the optical detection unit 40, and the absorbance of the entire electrophoretic path C is measured after a predetermined time elapses. It is preferable to do so.
- the reason for this is that, for example, at a position where the absorbance is not measured for the DNA sample to be measured, there is a speed difference between the wild DNA and the mutant DNA contained in the DNA sample, and at one point where the absorbance is measured, This is because the speed difference between wild DNA and mutant DNA may disappear.
- Step S18 As described above, the outer peripheral flow path 116b is scanned an arbitrary number of times, here nine times, by the optical detection unit 40, and when the measurement is completed, the electrodes 32a, 32b are The voltage application is stopped, the heating of the heater 33 is also stopped, and the plate 10 is rotated together with the ceiling plate 37 by the low-speed rotation motor 38 so that the plate 10 is at a position where it can be held on the plate holding portion 22.
- Step S19 After the position is determined, the elevating stage 50 is lowered from the position of the second stage to the position of the first stage, at which position the clamper 36 and the plate receiving portion 21a After being dissociated, the plate 10 is further lowered to the lowest point, and the plate 10 is held on the plate holding portion 22. At this point, the plate 10 is ready to be discharged from the biological sample determination device 100.
- the DNA conjugate solution is filled in the outer peripheral channel 116b by centrifugal force using the filling kit 20 of the biological sample discriminating apparatus 100, and After the DNA sample is pressurized and quantitatively added to the DNA conjugate solution by centrifugal force, a voltage is applied to the electrodes 32a and 32b provided in the discrimination unit 30 to perform electrophoresis. Is rotated several times at low speed every predetermined time, and the optical detection unit 40 scans the entire migration flow path portion of the outer peripheral flow path 116b a predetermined number of times to measure the absorbance or fluorescence of the migration flow path part. Therefore, the presence of the target DNA to be detected contained in a DNA sample from which specific DNA has been extracted from cells, blood, etc. can be determined accurately and in a short time without using a single tube that requires complicated preparation work. To determine Possible and will, obtain accurately and quickly line determination or DNA abnormality studies of various diseases.
- the lifting stage 50 is moved between the first stage position and the second stage position by the vertical movement motor 51.
- the plate 10 is moved up and down.
- the sample is filled by the filling unit 20, and at the second stage position, the optical detection process is performed by the discrimination unit 30.
- the size of the biological sample discriminating apparatus can be reduced, and the weight can be reduced.
- the biological sample is a DNA sample
- the DNA sample contains a mutant sample.
- the present apparatus is not limited to such use, but can be applied to an antigen-antibody reaction and an enzymatic reaction.
- the plate 10 is rotated at a high speed by the high-speed rotation motor 21 of the filling unit 20 when filling the first flow path 116 with the DNA conjugate solution in step S5.
- the DNA conjugate solution was filled in the flow channel by the centrifugal force generated by the high-speed rotation.
- the buffer solution injection part 123 was pressurized by a pump or the like, or the sample pool was filled.
- the DNA conjugate solution may be filled in the channel by suctioning the DNA conjugate solution with a pump or the like or by utilizing the capillary action of the DNA conjugate solution itself.
- the pressurizing pump unit 52 in the device 100 is configured as a pump system capable of pressurizing and suctioning, If the suction process can be performed by the pressurizing unit 24 via the pump tube 53, the suction process can be realized without providing a new suction unit in the device.
- step S12 when the DNA sample is moved from the first channel position E1 of the second channel 117 to the second inflow position E2 by the filling unit 20, the DNA sample is injected.
- the case where the injection port 124 is pressurized by the pressurizing unit 24 for a certain period of time has been described as an example.
- the injection port 124 or the air hole 135 of the sample pool 115 may be sucked by the pressurizing unit 24, or the capillary phenomenon of the DNA sample may be used.
- step S14 when a certain amount of the DNA sample is added to the DNA conjugate solution, the plate 10 is rotated at a high speed, and the centrifugal force generated thereby leaves the DNA sample only in the quantification part 117a.
- the DNA filled in the second flow path 117 may be used.
- the sample can also be realized by aspirating the inlet 124 or the air hole 135 of the sample pool 115 with the pressurizing unit 24. Specifically, the DNA sample (see FIG.
- the plate 10 is rotated at a high speed, and the movement of the DNA sample other than the quantification unit 117a is accelerated by the centrifugal force. Can be added in a shorter time to the outer peripheral channel 116b filled with the DNA conjugate solution.
- the DNA sample of Step S5 is moved to the first inflow position of the second flow path 117.
- the air hole in the sample pool 115 is used to bring the state of E1 (Fig. 6 (c)) to the state (Fig. 6 (e)) where the DNA sample in step S14 has been quantitatively added. It is also possible to carry out suction of 135.
- the filling of the DNA sample into the quantitative section 117a is performed by the pressure difference between the sample injection section 114 of the second flow path 117 and the sample pool 115. It is also possible to perform this by pressurizing the inlet 124 of the part 114.
- the second inflow position E2 is inside the sample pool 115. However, since the DNA sample may be filled in the quantification unit 117a, the second inflow position E2 is fixed. It is sufficient if it is the position to fill the measuring part 117a, and it is not necessary to reach the sample pool 115! /.
- one channel pattern 110 is formed in plate 10, but as shown in FIG. 14, four identical patterns are formed in plate 10.
- SNPs in four different DNA samples may be detected at one time.
- four electrodes 32a and 32b provided on the ceiling plate 37, four heaters 33, one pressurizing part 24, and four thermistors 34 are required.
- the voltage is applied to the electrodes 32 a and 32 b inserted into each pattern by the high-voltage power supply 66 in consideration of the time lag of the measurement in each channel pattern 110. , For each pattern. By doing so, the electrophoresis time of data at the time of measurement can be made the same for all patterns.
- the number of repetitions to be measured can be set according to a user's request.
- the same DNA conjugate is filled in all the patterns, and human DNA samples different in number from the flow path pattern formed on the plate 10 are injected into each of the flow path patterns. Then, the same SNPs can be discriminated for many people by one measurement, and information on the distribution status of each SNPs can be obtained at a time.
- the heater 33 in order to control the outer peripheral channel 116b of the plate 10 to a predetermined temperature, the heater 33 is provided to heat the outer peripheral channel 116 to a constant temperature. Since the outer channel 116b only needs to be at a constant temperature, a Peltier element or the like is provided instead of the heater 33, for example, and cooling is performed according to the temperature of the outer channel 116b. The temperature may be controlled to be constant by heating or the like.
- the DNA conjugate solution injected into the buffer injection unit 113 is purified in the first embodiment!
- the DNA conjugate solution may be injected into the buffer injection unit 113.
- a purification treatment such as removing unreacted beiled DNA at the time of preparing the DNA conjugate solution
- put the prepared DNA conjugate solution inside a dialysis membrane such as cellophane. Rotate the dialysis membrane in a large amount of ultrapure water to remove unreacted DNA inside. As a result, a highly pure DNA conjugate solution can be obtained.
- the plate 10 is inserted by the determination unit 30 in step S6. After detecting the matching position, proceed to step S10 Further, in the first embodiment, a case where a DNA sample as a biological sample moves in a DNA conjugate solution as a buffer by electrophoresis is described as an example.
- the electrode insertion portions 111 and 112 for inserting the electrodes are provided on the plate 10, the electrodes 32 a and 32 b of the discrimination unit 30 and the electrodes 32 a and 32 b on the plate 10 are not provided.
- the electrode inlets 111, 112 and the electrode standby holes 118, 119 are required.
- the heater that heats the inside of the channel pattern provided on the plate and the thermistor that measures the temperature of the channel are provided from the ceiling plate of the discriminating unit 30. A force that is provided by suspending it. Finally, these are provided on a plate.
- FIG. 15 is a configuration diagram of the biological sample discriminating apparatus according to the second embodiment.
- the biological sample discriminating apparatus 200 according to the second embodiment includes a heater contact for applying a predetermined voltage to the plate 10 instead of the heater 33 provided in the discriminating unit 30.
- a pin 233 is provided, and a thermistor contact pin 234 for applying a predetermined voltage to the plate 10 is provided instead of the thermistor 34 provided in the determination unit 30.
- the other configuration is the same as that of the first embodiment, and the description is omitted here.
- FIG. 16 is a diagram showing a cross section of the plate according to the second embodiment.
- a heat wire or a circuit here, a heater electrode thin film
- a thermistor 142 are embedded on the outer peripheral flow path 116b.
- the heater contact pin 233 and the thermistor contact pin 234 provided in the discriminating unit 30 of the biological sample discriminating apparatus 200 force the contact with the heater electrode thin film 141 and the thermistor 142 to apply a voltage to the heater electrode thin film.
- the configuration of the flow path pattern 110 of the plate 10 is the same as that of the first embodiment.
- the thermistor and the heater provided in the discrimination unit 30 are provided on the plate 10, and the discrimination unit 30 is provided with the thermistor contact pin 234 and the heater contact pin 233, Since a predetermined voltage was applied to plate 10, this device
- Step S1 First, by hand using a syringe, the DNA of the flow path pattern 110 provided on the plate 10 was added to the buffer agent ⁇ 113 and the Sampnore ⁇ 114, respectively, and the injection population was 123, 124. Inject the conjugate solution and DNA sample.
- Step S2 Then, by operating the operation buttons (not shown) and the like, the plate 10 into which the sample is injected is set on the plate holding section 22 of the apparatus 200, and then the plate loading is performed.
- the lowermost point is the position of the lifting stage 50 when this plate is loaded.
- Step S3 Step S5
- the lifting stage 50 is moved up to the first stage position by the vertical movement motor 51, and at the first stage position, the control by the high-speed rotation motor 21 is performed.
- a conjugate filling process is performed. Since the conjugate filling process is the same as that described in the first embodiment, the description is omitted here.
- Step S6 Step S7
- the position where the plate 10 and the discriminating unit 30 are fitted is detected and detected by the positioning mark detection sensor 35 provided in the discriminating unit 30. Later, the lifting stage 50 moves to the second stage position.
- the fitting pin 31 of the discrimination unit 30 is inserted into the fitting pin hole 11 of the plate 10.
- the first and second electrode inserts 112 of the second plate 10, the electrode inserts 121 and 122 of the second plate 112, and the electrodes 32 a and 32 b of the discrimination unit 30 are inserted, and the plate 10 is put on standby for pressurization.
- the pressurizing portion 24 comes into contact with the hole 136
- the heater contact pin 233 provided on the discriminating unit 30, and the thermistor contact pin 234 come into contact. Rise up.
- the fitting pins 31, the electrodes 32a, 32 b, the pressing unit 24, the heater contact pin 233, and the thermistor contact pin 234 are pressed, and the discrimination unit 30 and the plate 10 are fitted. Therefore, the position of the lifting stage 50 at which the discriminating unit 30 and the plate 10 are fitted to each other is the position of the second stage.
- the lifting stage 50 is raised to the second stage position, and after the plate 10 and the components of the discrimination unit 30 are fitted, the heater contact pin 233 is used to move the plate.
- a voltage is applied to the heater electrode thin film 141 buried in the plate 10, the temperature of the outer flow path 116 b is measured by the thermistor 142 buried in the plate 10, and the voltage applied to the heater electrode thin film 141 is controlled while controlling the voltage.
- the outer peripheral channel 116b is heated to a predetermined temperature.
- what is provided on the plate 10 is not limited to the heater electrode thin film 141, but may be anything as long as the temperature of the outer peripheral flow path 116b can be kept constant.
- a circuit capable of cooling and heating such as a Peltier element that is not only heated, may be embedded in the plate 10.
- Step S8 As described above, after the outer peripheral channel 116b is brought to a predetermined temperature, the voltage supplied from the high voltage power source 66 is applied to the electrodes 32a, 32b provided on the ceiling plate 37. Perform conjugate purification.
- Step S9-Step S12 After the conjugate purification treatment described above, the filling sample 20 pressurizes the second sample injection part 114, and the DNA sample is subjected to the second treatment. The channel 117 is filled.
- Step S13 Step S14
- the elevation stage 50 is lowered from the second stage position to the first stage position by the up / down motor 51.
- a quantitative addition operation is performed in which a fixed amount of a DNA sample is added to a part of the outer peripheral channel 116b filled with the conjugate solution.
- Step S15 In order to perform the measurement operation by the determination unit 30, in order to raise the elevating stage 50 from the position of the first stage to the position of the second stage by the vertical movement motor 51, The plate confirmation mark 13 provided on the upper surface of the plate 10 is detected by the positioning mark detection sensor 35, and the position at which the discrimination unit 30 and the plate 10 can be fitted is determined.
- Step S16 Step S17
- the elevation stage 50 is raised to the second stage position by the vertical movement motor 51 and is fitted to the ceiling plate 37, and then the heater contact pins 233 are used.
- the outer peripheral flow path 116b is heated to a predetermined temperature, and the voltage supplied from the high-voltage power supply 66 is applied to the electrodes 32a and 32b, so that the DNA sample is DNA-conjugated. Electrophoresis is performed in the outer peripheral channel 116b filled with the gate solution, and an optical detection process is performed in which the optical detector 40 detects absorbance or fluorescence of the outer peripheral channel 116b.
- Step S18 The outer peripheral flow path 116b shown above is scanned an arbitrary number of times by the optical detection unit 40, and when the measurement is completed, the voltage application to the electrodes 32a and 32b by the high-voltage power supply 66 is stopped. The heating of the heater 33 is also stopped, and the plate 10 is rotated together with the ceiling plate 37 by the low-speed rotation motor 38 so that the plate 10 is at a position where it can be held on the plate holding portion 22.
- Step S19 After the position is determined, the elevating stage 50 is lowered from the second stage position to the first stage position by the up / down motor 51, and at that position, the clamper 36 and the plate receiver are moved. After the part 21 is dissociated, it is further lowered to the lowest point to hold the plate 10 on the plate holding part 22. At this point, the plate 10 is ready to be discharged from the biological sample determination device 200.
- the heater electrode thin film 141 and the thermistor 142 are embedded in the plate 10, and the heater contact pin 233 and the thermistor are installed in the determination unit 30 of the biological sample determination device 200.
- a contact pin 234 is provided, a predetermined voltage is applied to the heater electrode thin film 141 of the plate 10 by the heater contact pin 233 to heat the outer peripheral flow path 116b, and to the thermistor 142 of the plate 10, A predetermined voltage is applied by the thermistor contact pin 234 to measure the temperature of the outer peripheral flow path 116b to control the heater electrode thin film 141.
- the present biological sample discriminating apparatus 200 is capable of accurately and quickly discriminating the presence of the target DNA to be detected contained in the sample without using a capillary tube that does not require complicated preparation work. The size can be reduced and the weight can be reduced.
- the first and second electrodes of the plate 10 are further provided.
- the first and second electrodes 143a and 143b may be provided in the pole insertion portions 111 and 112.
- voltage is applied to each electrode 143a and 143b provided on the plate 10.
- the electrode contact pins 232a and 232b for applying the voltage may be provided.
- the pressurizing pump section 52 is a pump system capable of pressurizing and suctioning, and the pressurizing section 24 is connected via a pump tube 53.
- the DNA sample can be quantified, and the DNA sample can be filled and quantified, whereby the DNA sample can be quantified in a shorter time. A certain amount of DNA sample can be added to the solution.
- each electrode is cleaned while the electrode to be inserted into the electrode insertion portion is on standby.
- FIG. 19 is a diagram showing in detail the configuration of the first electrode insertion portion and the first electrode standby hole provided on the plate in the third embodiment
- Fig. 20 shows the configuration of the third embodiment
- FIG. 22 is a diagram showing in detail the vicinity of a first electrode insertion portion provided on a plate having another configuration in FIG. 3
- FIG. 21 is a diagram showing a configuration of a detection unit in the third embodiment.
- FIG. 19 a method of holding a cleaning liquid for cleaning an electrode in the first electrode standby hole 118 is shown.
- the second sample injection unit 114 is pressurized by the pressurizing unit 24 in step S12 in FIG. Inserted into first electrode standby hole 118 and waits As a result, the electrode 32 can be cleaned with the cleaning liquid held in the first electrode standby hole 118 during this time. In this way, foreign substances such as dust attached to the electrode 32 can be washed away during conjugate purification or storage in the present apparatus 100 or 200.
- the flow path is not formed on the concentric circle with the first electrode insertion portion 111 where the electrode 32 of the plate 10 is inserted.
- a cleaning area 16 in which a large number of felts and fine brushes are present in one place is provided. If such a washing region 16 is provided on the plate 10, when the determination unit 30 is rotated by the measuring motor 38 in step S10 in FIG.
- the electrode 32 can be washed by piercing the electrode 32 or slightly rotating after piercing, thereby purifying the conjugate during purification of the conjugate or the apparatus.
- the electrode 32 can be pierced into the cleaning area 16 by raising and lowering the elevating stage 50, and a slight rotation in the cleaning area 16 is realized by rotating the discrimination unit 30 by the low-speed rotation motor 38. it can.
- an electrode cleaning tank 301 is provided in the biological sample discriminating apparatus.
- the electrode cleaning tank 301 is provided in the apparatus 300, and the electrode 32 is slid onto the electrode cleaning tank 301 while the series of operation determination units 30 are on standby or every time the apparatus 300 is operated. If the electrode 32 is washed, the electrode 32 can be washed, and foreign matter such as dust attached to the electrode 32 can be washed away during conjugate purification or storage of the apparatus 300.
- the conjugate is purified. Until the electrodes 32a and 32b are inserted into the first and second electrode insertion portions 111 and 112, or if it is not necessary to purify the conjugate, the operation starting force is also changed to the first and second electrodes 32a and 32b.
- the electrodes 32a and 32b are washed with a washing solution or a washing area 16 provided with a felt or the like provided on a plate before the electrodes 32a and 32b are inserted into the electrode insertion portions 111 and 112. A DNA sample from which specific DNA has been When a measurement is performed by the device, a more accurate detection result can be obtained.
- the optical detection unit 40 is fixed on the lifting stage 50, and is configured to move integrally with the lifting stage 50.
- a height adjusting mechanism for adjusting the height of the detection unit 40 is further provided.
- the biological sample discriminating apparatus determines the presence or absence of SNPs in the DNA sample, and the determination is performed by the optical detection unit 40 using the flow path pattern 110 formed on the plate 10.
- the optical detection unit 40 By detecting a part of the absorbance or fluorescence by the optical detection unit 40, the migration state of the DNA sample electrophoresing in the DNA conjugate solution is detected, and the presence or absence of SNPs is determined based on the detection result
- the optical detection unit 40 determines the presence or absence of SNPs in the DNA sample, and the determination is performed by the optical detection unit 40 using the flow path pattern 110 formed on the plate 10.
- the optical detection unit 40 needs to keep a constant distance from the plate 10 at all times. There is. This is because, if the measurement is not performed while maintaining a certain distance from the sample at the time of measurement, the amount of light entering the optical detection unit 40 varies, and as a result, the detection result varies.
- the optical detection unit 40 is provided on the elevating stage 50, so that the plate 10 and the optical detection unit 40 are kept at a fixed distance.
- the plate 10 receives pressure due to contact with the heater 33 or insertion of the electrode 32 into each of the electrode insertion sections 111 and 112. May change.
- the distance from the plate 10 to the lift stage 50 is measured by laser reflection or the like.
- a distance measuring unit 42 is provided, and a height adjusting unit 41 that adjusts the height of the optical detecting unit 40 according to the measurement result of the distance measuring unit 42 is provided in the optical detecting unit 40.
- the height adjusting unit 41 an actuator is conceivable.
- a micrometer 41a is provided as shown in FIG. 22 (a)
- a voice coil motor 41b is provided as shown in FIG.
- the coil 41b By changing the direction of the current flowing through the voice coil motor 41b according to the measurement result from the distance measuring unit 42, the coil 41b can be moved up and down, or as shown in FIG. It is conceivable that the piezoelectric element 41c is moved up and down by providing a voltage according to the measurement result from the distance measuring unit 42 to the piezoelectric element 41c. This makes it possible to finely adjust the positions of the optical detection unit 40 and the plate 10 and always keep a constant distance.
- the distance measurement unit 42 is provided on the lifting stage 50, and the height adjustment unit 41 for adjusting the height is provided on the optical detection unit 40.
- the distance between the plate 10 and the optical detecting unit 40 can always be kept constant by the height adjusting unit 41.
- cells, blood, etc. It is possible to obtain extremely accurate detection results when measuring a DNA sample obtained by extracting a specific DNA from the biological sample with this biological sample discriminator.
- FIG. 23 is a configuration diagram of the biological sample discriminating plate according to the fifth embodiment.
- FIG. 23A shows a sample injection surface of the plate
- FIG. 23B shows a channel forming surface of the plate.
- the plate 10 in the fifth embodiment has a thickness of 2 mm, and has an opening 10a at the center as shown in FIG.
- a groove with a depth of 50 m is dug on the flow path pattern forming surface of the plate, and a 50 m thick acrylic film is adhered to the groove forming surface to form a closed flow path.
- Four channel patterns 110a-110d are formed on the plate of the fifth embodiment, and the portion shown within the broken line is the analysis pattern of one sample.
- a DNA conjugate and a DNA sample, which is a sample, are injected into the closed channel, and the injection locator 123a for the DNA conjugate solution is injected into each channel pattern 110a-110d for injecting them.
- each flow path pattern 110 Details of each flow path pattern 110 are the same as those described in the first embodiment, and a description thereof will not be repeated.
- FIG. 24 is a diagram showing another example of the flow channel pattern formed on the biological sample determination plate.
- the flow path pattern shown in FIG. 24 is different from the flow path pattern of Embodiment 1 in that the buffer solution injection section 123 and the inner peripheral flow path 116a in the flow path pattern 110 shown in Embodiment 1 are deleted.
- the electrode insertion portions 121 and 122 for inserting the negative and positive electrodes are also used as buffer insertion portions for injecting the DNA conjugate solution.
- the second flow path including the buffer injection section 123, the inner flow path 116a, the electrode insertion sections 111 and 112, the outer flow path 116b, the sample injection section 124, and the quantification section 117a.
- the inner circumferential flow path 116a and the outer circumferential flow path 116b and the second flow path 117 including the quantification unit 117a may be formed on the front and back of the plate 10 in the same plate.
- the sample injection unit 124 and the buffer injection The portion 114 may be formed on another surface. In this way, when a sample or a buffer is injected into the plate 10, the injection port can be easily identified, and it can be prevented from being injected erroneously.
- a fixed amount of the DNA sample is held by the quantitative section A on the plate 10, and the positive electrode insertion section 112, the negative electrode insertion section 121, the flow path 116b, A configuration in which electrophoresis can be performed by B, and the flow path 116b for electrophoresis is formed in an arc shape, so that a DNA sample from which specific DNA such as cells or blood is extracted can be used in the present biological sample discrimination plate.
- the biological sample determination device of the present invention performs determination of a biological sample such as a DNA sample. It is useful as an inexpensive and simple one.
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Dispersion Chemistry (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Hematology (AREA)
- Clinical Laboratory Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
- Automatic Analysis And Handling Materials Therefor (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200480036300XA CN1890566B (zh) | 2003-12-26 | 2004-12-27 | 生物样品鉴别装置、生物样品鉴别方法以及生物样品鉴别用平板 |
EP04807863A EP1712916A4 (en) | 2003-12-26 | 2004-12-27 | DEVICE FOR DISCRIMINATION OF A BIOLOGICAL SAMPLE, METHOD FOR DISCRIMINATION OF A BIOLOGICAL SAMPLE, AND DISCRIMINATION PLATE FOR A BIOLOGICAL SAMPLE |
JP2005516686A JP4646809B2 (ja) | 2003-12-26 | 2004-12-27 | 生体サンプル判別装置、生体サンプル判別方法、及び生体サンプル判別用プレート |
US10/584,300 US20070148759A1 (en) | 2003-12-26 | 2004-12-27 | Biological sample discrimination device, biological sample discriminating method, and biological sample discriminating plate |
US13/044,046 US20110256572A1 (en) | 2003-12-26 | 2011-03-09 | Biological sample discrimination apparatus, biological sample discrimination method, and biological sample discrimination plate |
Applications Claiming Priority (2)
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JP2003-434073 | 2003-12-26 | ||
JP2003434073 | 2003-12-26 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/044,046 Division US20110256572A1 (en) | 2003-12-26 | 2011-03-09 | Biological sample discrimination apparatus, biological sample discrimination method, and biological sample discrimination plate |
Publications (1)
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WO2005064339A1 true WO2005064339A1 (ja) | 2005-07-14 |
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ID=34736548
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PCT/JP2004/019508 WO2005064339A1 (ja) | 2003-12-26 | 2004-12-27 | 生体サンプル判別装置、生体サンプル判別方法、及び生体サンプル判別用プレート |
Country Status (5)
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US (2) | US20070148759A1 (ja) |
EP (1) | EP1712916A4 (ja) |
JP (1) | JP4646809B2 (ja) |
CN (1) | CN1890566B (ja) |
WO (1) | WO2005064339A1 (ja) |
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JP2007187586A (ja) * | 2006-01-13 | 2007-07-26 | Matsushita Electric Ind Co Ltd | 電気泳動装置 |
JP2009014407A (ja) * | 2007-07-02 | 2009-01-22 | Sharp Corp | キャピラリー可動器具およびこれを用いたキャピラリー電気泳動装置 |
WO2009078352A1 (ja) * | 2007-12-14 | 2009-06-25 | Ngk Insulators, Ltd. | 流体収容カートリッジ及びその利用 |
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Also Published As
Publication number | Publication date |
---|---|
CN1890566A (zh) | 2007-01-03 |
EP1712916A1 (en) | 2006-10-18 |
US20070148759A1 (en) | 2007-06-28 |
US20110256572A1 (en) | 2011-10-20 |
EP1712916A4 (en) | 2008-07-23 |
CN1890566B (zh) | 2011-07-20 |
JPWO2005064339A1 (ja) | 2007-12-20 |
JP4646809B2 (ja) | 2011-03-09 |
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