WO2005083448A1 - 生体高分子のマイクロアレイ用基板、ハイブリダイゼーション装置、およびハイブリダイゼーション方法 - Google Patents
生体高分子のマイクロアレイ用基板、ハイブリダイゼーション装置、およびハイブリダイゼーション方法 Download PDFInfo
- Publication number
- WO2005083448A1 WO2005083448A1 PCT/JP2005/002440 JP2005002440W WO2005083448A1 WO 2005083448 A1 WO2005083448 A1 WO 2005083448A1 JP 2005002440 W JP2005002440 W JP 2005002440W WO 2005083448 A1 WO2005083448 A1 WO 2005083448A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- substrate
- biopolymer
- hybridization
- microarray
- conductive path
- Prior art date
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Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6813—Hybridisation assays
- C12Q1/6834—Enzymatic or biochemical coupling of nucleic acids to a solid phase
- C12Q1/6837—Enzymatic or biochemical coupling of nucleic acids to a solid phase using probe arrays or probe chips
Definitions
- the present invention relates to a substrate for microarrays of biopolymers such as DNA and RNA, a hybridization device using the substrate, and a high-speed hybridization device using the device. About the method.
- biopolymer microarrays for example, DNA chips and DNA microarrays
- a method for immobilizing DNA for example, there is a method in which a thiol is bonded to single-stranded DNA, and the single-stranded DNA that is thiolated is immobilized on, for example, a metal substrate.
- the target DNA which is a subject, is allowed to act on the immobilized probe DNA, and the presence or absence of hybridization between them is detected.
- the presence or absence of the hybridization is determined, for example, by using a fluorescence method, and can be detected by measuring the fluorescence from the spot of the fluorescence-labeled target DNA hybridized to the probe DNA.
- a spotting type DNA microarray is prepared by placing a droplet containing probe DNA on a substrate and drying the droplet (see Non-Patent Document 1).
- This has the advantage that it can be produced at low cost, but has the disadvantage that the uniformity of the DNA immobilized on the substrate is not guaranteed. That is, there is a disadvantage that the size and shape of the DNA detection spot portion vary.
- Gridding refers to an operation of inputting the number of vertical and horizontal spots on the array, the spot interval, and the size of the spot diameter, and surrounding the spot with a circle (see Non-Patent Document 1).
- the stamp shape and position of the spot are stable, it takes a very long time to perform the gridding operation at the time of fluorescence analysis, and accurate analysis becomes difficult.
- hybridization of the probe DNA immobilized on the substrate with the target DNA usually requires ten and several hours.
- large amounts of sample are required for hybridization. Therefore, enormous time, cost and labor are required for hybridization time and preparation of a large amount of sample. In particular, when analyzing low-expressing genes, an extremely large number of samples are required.
- Non-patent document 1 "A manual for DNA microarrays that always produces data, from basic principles, chip making technology to bioinformatics", 1st edition, Yodosha, December 1, 2002, P. 19-21, 35, 106 -108
- the present invention provides a method for applying an AC or DC voltage to a planar electrode to generate an electric field, thereby speeding up biopolymers and hybridization by dielectrophoresis or electrophoresis. Hybridization of biological macromolecules with molecules readable by laser etc.
- a substrate for hybridization a hybridization device for biopolymers, and a hybridization method.
- the present invention provides the following.
- a pair of two conductive paths connected to a DC or AC power supply are installed on this board, and the electric field distribution between the two conductive paths in a part of the conductive path pattern is localized.
- a biomolecule microarray characterized in that a probe molecule for detecting a biopolymer is fixed on a conductive path in the vicinity thereof or near the vicinity thereof. substrate.
- a pair of two conductive paths connected to a DC or AC power supply are installed on this board, and the electric field distribution between the two conductive paths in a part of the conductive path pattern is localized.
- a biomolecule detection probe molecule fixed at a position facing the vicinity of the conductive path of the proximity portion or the vicinity of the proximity portion on the opposing substrate disposed opposite to the substrate so as to be stronger than the substrate.
- an AC or DC voltage is applied between the conductive paths to generate an electric field having a locally strengthened distribution between the closely arranged conductive paths.
- Biopolymer can be easily concentrated by dielectrophoresis or electrophoresis
- a biopolymer microarray substrate characterized in that there are two or more adjacent portions of the conductive path.
- an electrode for detecting the presence or absence of the hybridization is provided.
- Biopolymer hybridization apparatus characterized by the following:
- an AC or DC voltage is applied between the conductive paths from the power supply to generate an electric field having a distribution that is locally strengthened between the conductive paths arranged close to each other.
- a biopolymer can be concentrated by conducting dielectrophoresis or electrophoresis in a conductive path arrangement portion, and a hybridization device capable of achieving high-speed elimination of hybridization can be easily realized. it can.
- a cover substrate made of a transparent material is provided opposite to the substrate surface on which the conductive path is provided, and the fluorescent marker hybridized through the cover substrate.
- a biomolecule hybridization device characterized in that it is configured to observe the fluorescence of a biomolecule attached thereto.
- An AC voltage or a DC voltage output from the power supply is applied between the conductive paths to generate an electric field, and the sample biopolymer target which naturally diffuses into the solution is subjected to dielectrophoresis.
- the hybridization can be easily performed at high speed.
- planar electrodes An AC or DC voltage is applied between two adjacent conductive paths (hereinafter referred to as planar electrodes) provided on the substrate to generate an electric field near the planar electrodes.
- planar electrodes two adjacent conductive paths
- a biopolymer microarray substrate capable of concentrating a biopolymer in the vicinity of a planar electrode, a hybridization device using the microarray substrate, and a method for high-speed hybridization Can be easily realized.
- the cover substrate disposed opposite to the substrate surface on which the plane electrode surface is provided is formed of a transparent material.
- the substrate of the present invention simply attaches a planar electrode to a conventional substrate, and can easily produce a low-cost biopolymer microarray (such as a DNA chip) with a low manufacturing cost.
- the flat electrode pattern is made of metal and has a high reflectance, gridding can be easily performed by measuring a reflected image.
- FIG. 1 is a configuration diagram of an embodiment showing a part of a biopolymer hybridization apparatus according to the present invention.
- FIG. 2 is a view showing the shape of a planar electrode.
- FIG. 3 is a view showing an example of a spot of a biopolymer.
- FIG. 4 is a diagram showing another example of a spot of a biopolymer.
- FIG. 5 is a view showing another example of installation of the plane electrode and the probe DNA.
- FIG. 6 is a view showing still another example of installation of a plane electrode and probe DNA.
- FIG. 7 is a view showing still another example of installation of a planar electrode and probe DNA.
- FIG. 8 is a view showing still another example of installation of a plane electrode and probe DNA.
- FIG. 1 is a block diagram of an embodiment showing a part of a biopolymer hybridization apparatus according to the present invention, and also includes an objective lens provided in a reader for reading a fluorescent label of a hybridized biopolymer. Shown.
- DNA will be described as an example of a biopolymer.
- reference numeral 1 denotes a biopolymer hybridization device
- reference numeral 20 denotes an objective lens of a reading device.
- the biopolymer hybridization apparatus 1 is composed of a substrate 2, planar electrodes 3 and 4, which are two-pole conductive paths arranged particularly close to a conductive path mounted on the upper surface of the substrate 2, and a transparent material. An electric field is applied between the cover substrate 5 formed by Power supply 10 is provided.
- the probe DNA 6 is immobilized on the upper surfaces of the planar electrodes 3 and 4, and the space between the substrate 2 and the cover substrate 5 is filled with a solution 8 containing the sample target DNA 7.
- the substrate 2 and the cover substrate 5 are formed in a closed container surrounded by side walls (not shown), and have a structure in which the solution 8 does not flow out.
- the planar electrodes 3 and 4 and the probe DNA 6 pertaining to one site such planar electrodes are arranged at a predetermined interval for a plurality of sites on one DNA chip or DNA microarray. You.
- the planar electrodes 3 and 4 are arranged on the substrate 2 at positions close to each other so that the two electrodes do not contact each other.
- the shape is, for example, as shown in (a)-(c) of FIG.
- FIG. 2 (a) shows a planar electrode composed of a circular electrode and a circular electrode surrounding the circular electrode.
- the circular electrode 3 and the circular electrode 4 are each a lead wire.
- the power supply 10 is connected via 3a and 4a.
- FIG. 2B shows comb-shaped planar electrodes nested in each other, and the electrodes 3 and 4 are connected to a power supply 10 via lead wires 3a and 4a, respectively.
- FIG. 2 (c) shows spirally formed electrodes, and electrodes 3 and 4 are respectively
- the planar electrode having such a shape can be produced by a force attached to the surface of the substrate 2, for example, as follows.
- a slide glass whose surface is polished is used as the substrate 2.
- Gold is deposited on the glass surface by vacuum deposition.
- the slide glass is irradiated with ultraviolet light through a photomask by an ultraviolet exposure apparatus. After the irradiation, development is performed to form an electrode-shaped resist pattern on the gold surface as shown in FIG.
- Gold on the surface other than the resist pattern is etched by a gold etchant.
- a glass substrate having an electrode-shaped gold pattern as in a photomask can be manufactured.
- the lead wire can be similarly manufactured by patterning.
- the probe DNA6 is stamped and immobilized on the electrode surface in advance.
- the probe DNA is spotted on the circular portion of the electrode 3 and fixed on the circular electrode.
- Empty space between board 2 and cover board 5 After a solution 8 containing a fluorescently labeled sample target DNA 7 is filled in between, an AC voltage is applied between the flat electrodes 3 and 4 from a power supply 10. As a result, the electric field density between the electrodes 3 and 4 increases, and the negatively charged sample target DNA 7 naturally diffused into the solution 8 is attracted to the vicinity of the electrodes 3 and 4 by dielectrophoresis and concentrated.
- the sample target DNA is washed away together with the solution 8, and the probe DNA is hybridized with the sample target DNA 7 and the force is applied to the probe bar through the transparent window. Irradiates light (for example, laser light).
- the fluorescent light that has also emitted fluorescent labeling enters the objective lens 20 through the cover substrate 5 and is read by the reader.
- the sample target DNA 7 hybridized to the probe DNA can be measured.
- a scanning confocal microscope, a scanless multibeam reader, or the like can be used for reading the fluorescently labeled DNA.
- the voltage applied to the electrodes 3 and 4 may be AC or DC.
- an AC voltage is applied as in the above-described embodiment, at a low frequency, a solution containing the sample target DNA 7 is liable to generate bubbles and the like due to electrolysis. Therefore, it is preferable to use a high-frequency AC.
- the power supply 10 uses an AC power supply or a DC power supply depending on whether the applied voltage is AC or DC. Alternatively, select either AC voltage or DC voltage by setting Use a power supply that can output.
- a plurality of the proximity electrode units shown in FIG. 2 can be arranged in an array on the substrate. This allows a large number of DNAs to be analyzed simultaneously.
- spots of a plurality of types of biopolymers may be separated and spotted on one proximity electrode portion.
- the spot may be located near the surface electrode. Even in this case, the hybridization is accelerated because the target DNA 7 exists at a high concentration near the electrode.
- the planar electrodes 3 and 4 and the probe DNA 6 may be provided on the side of the transparent cover substrate 5 for reading fluorescence.
- the probe DNA 6 is immobilized on a transparent flat electrode.
- the probe DNA 6 may be provided near the flat electrode.
- the flat electrode need not be transparent.
- the arrangement may be as shown in FIG. 7 or FIG.
- a substrate 2 having a structure in which a columnar or quadrangular prism-shaped convex protrusion 2a having a flat upper surface is formed on a flat plate is used as the substrate 2.
- the plane electrode and the probe DNA are arranged on the opposing surfaces. That is, in FIG. 7, the planar electrodes 3 and 4 are attached to the upper surface of the convex protrusion 2a, and the probe DNA 6 is fixed to the lower surface of the transparent cover substrate 5.
- the planar electrodes 3 and 4 are mounted on the lower surface of the transparent cover substrate 5, and the probe DNA 6 is mounted on the upper surface of the convex protrusion 2a.
- the gap a in this case that is, the gap a between the cover substrate 5 and the planar electrodes 3 and 4 in FIG. 7, and the gap a between the planar electrodes 3 and 4 and the upper surface of the convex protrusion 2a in FIG.
- the gap a is preferably narrow.
- a force that may cause electrolysis from a conductive wire other than the proximity portion is covered with a non-conductive film. Insulate it from the solution by the structure of.
- the detection may be carried out by using an intercalator-type reagent between the two strands after hybridization, instead of using a target DNA or the like that has been fluorescently labeled in advance, and detecting by a fluorescence signal or a current value. . Further, absorption or phosphorescence that is not fluorescent may be used. In the case of current detection, a dedicated electrode for detection and a detection circuit may be separately provided separately from the conductive path for hybridization.
- hybridization it is possible to perform hybridization at a very high speed in ordinary gene expression analysis. Hybridization can be performed at high speed without preparing a large amount of sample.
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Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/590,455 US20070178463A1 (en) | 2004-03-01 | 2005-02-17 | Micro-array substrate for biopolymer, hybridization device, and hybridization method |
DE112005000477T DE112005000477T5 (de) | 2004-03-01 | 2005-02-17 | Mikroarraysubstrat für Biopolymere, Hybridisierungseinrichtungen und Hybridisierungsverfahren |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-056237 | 2004-03-01 | ||
JP2004056237A JP2005249407A (ja) | 2004-03-01 | 2004-03-01 | 生体高分子のマイクロアレイ用基板およびハイブリダイゼーション装置およびハイブリダイゼーション方法 |
Publications (1)
Publication Number | Publication Date |
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WO2005083448A1 true WO2005083448A1 (ja) | 2005-09-09 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/002440 WO2005083448A1 (ja) | 2004-03-01 | 2005-02-17 | 生体高分子のマイクロアレイ用基板、ハイブリダイゼーション装置、およびハイブリダイゼーション方法 |
Country Status (5)
Country | Link |
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US (1) | US20070178463A1 (ja) |
JP (1) | JP2005249407A (ja) |
CN (1) | CN1934452A (ja) |
DE (1) | DE112005000477T5 (ja) |
WO (1) | WO2005083448A1 (ja) |
Families Citing this family (3)
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US8734003B2 (en) * | 2005-09-15 | 2014-05-27 | Alcatel Lucent | Micro-chemical mixing |
DE102008062620B4 (de) * | 2008-12-10 | 2012-12-27 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Vorrichtung und Verfahren zur Detektion von in flüssigen Proben enthaltenen Analytmolekülen |
WO2016062231A1 (zh) * | 2014-10-21 | 2016-04-28 | 鲍坚斌 | 凝胶电泳芯片 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004020386A (ja) * | 2002-06-17 | 2004-01-22 | Toray Ind Inc | 選択結合性物質のハイブリダイゼーション方法とハイブリダイゼーション装置および選択結合性物質固定用基材 |
JP2004045376A (ja) * | 2002-05-21 | 2004-02-12 | Sony Corp | バイオアッセイ用基板 |
JP2005024532A (ja) * | 2003-06-13 | 2005-01-27 | Institute Of Physical & Chemical Research | 生体分子マイクロアレイ用基板、生体分子マイクロアレイ、相互作用促進用装置および方法、ならびに、相互作用の検出方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US5082627A (en) * | 1987-05-01 | 1992-01-21 | Biotronic Systems Corporation | Three dimensional binding site array for interfering with an electrical field |
DE19860547C1 (de) * | 1998-12-23 | 2000-10-12 | Genetrix B V I O | Affinitätssensor für den Nachweis spezifischer molekularer Bindungsereignisse und dessen Verwendung |
JP3707766B2 (ja) * | 1999-09-09 | 2005-10-19 | 株式会社村田製作所 | 電界効果型半導体装置 |
US20020090649A1 (en) * | 1999-12-15 | 2002-07-11 | Tony Chan | High density column and row addressable electrode arrays |
DE10062173C1 (de) * | 2000-12-14 | 2002-08-08 | Inst Chemo Biosensorik | Verfahren zur Bestimmung von Analytkonzentrationen |
US20040011650A1 (en) * | 2002-07-22 | 2004-01-22 | Frederic Zenhausern | Method and apparatus for manipulating polarizable analytes via dielectrophoresis |
-
2004
- 2004-03-01 JP JP2004056237A patent/JP2005249407A/ja active Pending
-
2005
- 2005-02-17 WO PCT/JP2005/002440 patent/WO2005083448A1/ja active Application Filing
- 2005-02-17 US US10/590,455 patent/US20070178463A1/en not_active Abandoned
- 2005-02-17 DE DE112005000477T patent/DE112005000477T5/de not_active Withdrawn
- 2005-02-17 CN CNA200580006445XA patent/CN1934452A/zh active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004045376A (ja) * | 2002-05-21 | 2004-02-12 | Sony Corp | バイオアッセイ用基板 |
JP2004020386A (ja) * | 2002-06-17 | 2004-01-22 | Toray Ind Inc | 選択結合性物質のハイブリダイゼーション方法とハイブリダイゼーション装置および選択結合性物質固定用基材 |
JP2005024532A (ja) * | 2003-06-13 | 2005-01-27 | Institute Of Physical & Chemical Research | 生体分子マイクロアレイ用基板、生体分子マイクロアレイ、相互作用促進用装置および方法、ならびに、相互作用の検出方法 |
Also Published As
Publication number | Publication date |
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DE112005000477T5 (de) | 2007-01-18 |
US20070178463A1 (en) | 2007-08-02 |
CN1934452A (zh) | 2007-03-21 |
JP2005249407A (ja) | 2005-09-15 |
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