WO2001038875A1 - Lecteur de biopuce et reactif de marquage - Google Patents
Lecteur de biopuce et reactif de marquage Download PDFInfo
- Publication number
- WO2001038875A1 WO2001038875A1 PCT/JP2000/008050 JP0008050W WO0138875A1 WO 2001038875 A1 WO2001038875 A1 WO 2001038875A1 JP 0008050 W JP0008050 W JP 0008050W WO 0138875 A1 WO0138875 A1 WO 0138875A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- biochip
- magnetic sensor
- biochip reader
- magnetic
- reading
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00274—Sequential or parallel reactions; Apparatus and devices for combinatorial chemistry or for making arrays; Chemical library technology
- B01J2219/00277—Apparatus
- B01J2219/00497—Features relating to the solid phase supports
- B01J2219/00527—Sheets
- B01J2219/00536—Sheets in the shape of disks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T436/00—Chemistry: analytical and immunological testing
- Y10T436/13—Tracers or tags
Definitions
- a biochip reading device for detecting a spot in which a substance that binds to a specific biological substance binds to a spot in a biochip and a biochip read by the biochip reading device is created.
- the present invention relates to a labeling reagent suitable for performing the method.
- nucleic acids and proteins with known sequences have been used as probes to identify and fractionate molecules in the body, especially for the detection of target DNA or the presence or absence of gene DNA.
- Many methods are used to allow probes to hybridize nucleic acids, proteins, etc., as analytes.
- Biochips are used to efficiently integrate probes such as nucleic acids and proteins at a high density to detect the target DNA or to detect the presence or absence of the gene DNA.
- FIG. 6 is a diagram illustrating a configuration of a conventional biochip reader.
- a fluorescent reading method is generally used as a method for detecting spots that have been pre-hybridized. Nucleic acids and proteins to be tested are labeled with fluorescent substances, and hybridization is performed with the probe spotted on the biochip.
- a laser 15 is used as an excitation light source, and the excitation light 16 is reflected by a dichroic mirror 17 to a spot where the specimen is hybridized, and irradiated via a condenser lens 18. I do.
- the fluorescent substance labeled on the specimen is excited by receiving this excitation light, and the emitted fluorescent light is collected by the condenser lens 18 Is done.
- the condensed fluorescence passes through the dichroic mirror 17 and selectively transmits only the fluorescent component through the optical interference filter 19, thereby cutting off noise-generating optical components, and It is led to a multiplier tube 20. Since the photomultiplier tube 20 is a point sensor, the sample is scanned by the controller 4 in the X and Y directions, and the read data is acquired by the computer 5 as an image.
- the conventional method using fluorescence requires an expensive laser 15 and an optical system for reading, and has a problem that the cost of the apparatus is increased.
- the intensity of the fluorescent light emitted from the fluorescent substance is weak, and the fluorescent wavelength is not so far from the excitation wavelength, so that the fluorescent substance is located in front of the photomultiplier tube 20.
- the excitation light could not be completely cut by the optical interference filter 19 of the above, and high-sensitivity detection could not be performed.
- the present invention provides a biochip reader capable of reading a biochip with higher sensitivity than a method using fluorescence and an inexpensive apparatus configuration, and a biochip reader. It is intended to provide a labeling reagent suitable for preparing a biochip to be read. Disclosure of the invention
- the biochip reader includes a magnetic sensor that reads the strength of a magnetic field on a plane, and a scanning unit that performs two-dimensional scanning of the magnetic sensor relative to the biochip.
- the scanning means uses a disk reading mechanism of a general-purpose hard disk drive by rotating the biochip and scanning the magnetic sensor uniaxially in a direction orthogonal to the direction of the rotation. be able to.
- the labeling reagent of the present invention has a ferromagnetic substance that labels a biological substance.
- FIG. 1 is a diagram showing a configuration of a biochip reader according to one embodiment of the present invention.
- FIG. 2 is a diagram illustrating a method for labeling a specimen.
- FIG. 3 is a diagram for explaining a biochip processing method.
- FIG. 4 is a diagram illustrating an example of a result of reading the biochip according to the present embodiment with the biochip reading device according to the present embodiment.
- FIG. 5 is a diagram showing a configuration of a biochip reader according to another embodiment.
- FIG. 6 is a diagram illustrating a configuration of a conventional biochip reader. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a diagram showing a configuration of a biochip reader according to one embodiment of the present invention.
- the biochip reader according to the present embodiment includes an XY stage 3 for placing a biochip 6 thereon and performing two-dimensional scanning, and a controller 4 thereof, and a magnetic sensor 1 for reading the strength of a magnetic field. It consists of a resistance meter 2 and a computer 5 for signal processing.
- the magnetic sensor 1 for reading the magnetic strength uses a Giant Magneto Resistance (GMR) element currently used in the magnetic head of a high-density hard disk drive.
- GMR Giant Magneto Resistance
- This GMR element can extract changes in the magnetic field as changes in the electrical resistance. Therefore, the intensity of the magnetic field is converted into a signal via the resistance meter 2 and is taken into the signal processing computer 5.
- FIG. 2 is a diagram illustrating a method for labeling a specimen.
- DNA is used as a specimen that is a biological substance, and a substance magnetizing the DNA, that is, a ferromagnetic substance is labeled.
- magnetic beads 7 in which fine magnetic particles of magnetic iron oxide used as a ferromagnetic material in a magnetic recording medium such as a hard disk are enclosed in polystyrene are used.
- the enclosed polystyrene is dropped and solidified by dropping to form beads (spheres), and coated with streptavidin 8 on the surface.
- the size of the magnetized beads 7 usually ranges from 1 to 5, preferably 1 m.
- the sample DNA 10 is labeled with biotin 9 and the magnetic beads 7 are labeled on the sample DNA 10 using the specific binding of streptavidin 8 and biotin 9.
- FIG. 3 is a diagram for explaining a biochip processing method.
- the labeled sample DNA 10 is allowed to react with the biochip 6 spotted with the probe DNA 11 as shown in FIG. 3 ( a ).
- sample DNA 10 hybridizes to a spot having a base sequence complementary to sample DNA 10 .
- FIG. 3 (c) the biochip 6 after this hybridization is placed in a magnetic field provided with a magnet 12, and the magnetized beads 7 are magnetized. Since the coercive force of the fine particle magnetic material used in the present embodiment is about 320 kAT / m (400 eelstead), the magnetization is performed by applying a magnetic field that is about three times as large.
- FIG. 4 is a diagram showing an example of a result obtained by reading the magnetized biochip 6 with the biochip reader shown in FIG. In Fig. 4, the strength of the magnetic field of each spot is replaced with a grayscale gradation. The closer the color is to black, the stronger the magnetic field, and the greater the number of hybridized specimen DNA.
- the GMR element used in the device of the present embodiment is 0 to 400 It uses a material that can achieve a resistance change of about 30% in the magnetic field range of the diode, and has a very high detection sensitivity, so that one magnetized bead can be detected. That is, detection of one DNA molecule is possible.
- FIG. 5 is a diagram showing a configuration of a biochip reader according to another embodiment.
- the principle of reading is the same as that of the biochip reader shown in Fig. 1, but the biochip is formed in a disk shape, and the scanning method is to rotate the disk-shaped biochip 13 and scan the magnetic sensor 1 in one axis direction. Perform reading.
- This device reads by the same mechanism as a so-called ordinary hard disk drive.
- the disk-shaped tip 13 is rotated by a rotary motor 14 to scan the magnetic sensor 1 in a direction perpendicular to the rotation direction.
- the same mechanism as that of a general-purpose hard disk drive can be employed, so that a highly sensitive and inexpensive device can be obtained.
- the biochip reader may employ a flexible disk drive mechanism instead of a hard disk drive.
- the biochip can be attached and detached by using the disc attachment and detachment mechanism in the flexible disc drive.
- the magnetization may not be performed collectively by the magnets 12, but may be performed by using a write magnetic head such as a hard disk drive.
- the sensitivity of the magnetic sensor is very high, Can be read, and one DNA molecule can be detected.
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00976259A EP1146338A4 (en) | 1999-11-19 | 2000-11-15 | BIOCHIP READER AND LABELING REAGENT |
US09/889,747 US6787349B1 (en) | 1999-11-19 | 2000-11-15 | Biochip reader and labeling reagent |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP32994599A JP2001147230A (ja) | 1999-11-19 | 1999-11-19 | バイオチップ読取装置及び標識試薬 |
JP11-329945 | 1999-11-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001038875A1 true WO2001038875A1 (fr) | 2001-05-31 |
Family
ID=18227030
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/008050 WO2001038875A1 (fr) | 1999-11-19 | 2000-11-15 | Lecteur de biopuce et reactif de marquage |
Country Status (4)
Country | Link |
---|---|
US (1) | US6787349B1 (ja) |
EP (1) | EP1146338A4 (ja) |
JP (1) | JP2001147230A (ja) |
WO (1) | WO2001038875A1 (ja) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0124341D0 (en) * | 2001-10-10 | 2001-11-28 | Randox Lab Ltd | Assay |
JP4257513B2 (ja) * | 2003-09-12 | 2009-04-22 | 学校法人早稲田大学 | バイオセンシング方法 |
KR100747647B1 (ko) | 2003-10-18 | 2007-08-08 | (주)나노스토리지 | 바이오칩 판독 장치 및 바이오칩 판독장치를 갖는 진단장치 |
JP4285206B2 (ja) * | 2003-11-11 | 2009-06-24 | ソニー株式会社 | 給電用配線が延設されたバイオアッセイ用基板 |
CN1957251B (zh) * | 2004-05-18 | 2010-11-03 | 皇家飞利浦电子股份有限公司 | 用于改善生物传感中背景上信号的磁致旋转 |
US20060040273A1 (en) * | 2004-08-17 | 2006-02-23 | Alison Chaiken | Method and apparatus for magnetic sensing and control of reagents |
GB0704359D0 (en) * | 2007-03-07 | 2007-04-11 | Byotrol Plc | Methods and apparatus for particle detection |
KR100896234B1 (ko) | 2007-08-10 | 2009-05-08 | 주식회사 아이센스 | 전기화학적 바이오센서 및 이의 측정기 |
JP4911639B2 (ja) * | 2008-12-02 | 2012-04-04 | 学校法人早稲田大学 | バイオセンシング方法及び固定化方法 |
US8449842B2 (en) * | 2009-03-19 | 2013-05-28 | Thermo Scientific Portable Analytical Instruments Inc. | Molecular reader |
JP5451236B2 (ja) * | 2009-07-31 | 2014-03-26 | 富士フイルム株式会社 | 検出方法、および該検出方法に用いられる磁性体含有誘電体粒子 |
US8815610B2 (en) * | 2010-10-15 | 2014-08-26 | International Business Machines Corporation | Magnetic nanoparticle detection across a membrane |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH10506786A (ja) * | 1994-10-03 | 1998-07-07 | アデルマン,ロニィ,ダブリュ | ポリヌクレオチド及びポリペプチドの分離、配列決定及び増幅における磁化可能な部分、並びにその磁気検出 |
JPH1194747A (ja) * | 1997-09-19 | 1999-04-09 | Hitachi Software Eng Co Ltd | バイオチップ及びバイオチップ読取り装置 |
JPH11508031A (ja) * | 1995-03-01 | 1999-07-13 | シェリング アクチェンゲゼルシャフト | 残留磁気を利用する検出のための方法及び化合物並びにそれらの利用 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS63302367A (ja) * | 1987-06-01 | 1988-12-09 | Nippon Telegr & Teleph Corp <Ntt> | 磁気免疫測定方法および測定装置 |
SE8801070D0 (sv) | 1988-03-23 | 1988-03-23 | Pharmacia Ab | Method for immobilizing a dna sequence on a solid support |
GB8827160D0 (en) | 1988-11-21 | 1988-12-29 | Apothekernes Lab | Detection & quantitative determination of rna & dna |
KR920700360A (ko) | 1989-03-22 | 1992-02-19 | 하리크 프리드리히 | 미끄럼 베어링 |
GB9016163D0 (en) | 1990-07-24 | 1990-09-05 | Cemu Bioteknik | Chemical method |
AU9146491A (en) * | 1990-12-28 | 1992-08-17 | Abbott Laboratories | Simultaneous determination of multiple analytes using a time-resolved heterogeneous chemiluminescence assay |
GB9107124D0 (en) | 1991-04-05 | 1991-05-22 | Dynal As | Chemical process |
GB9122060D0 (en) | 1991-10-17 | 1991-11-27 | Dynal As | Method of sequencing double stranded dna |
GB9207598D0 (en) | 1992-04-03 | 1992-05-20 | Dynal As | Method of sequencing double stranded dna |
AU3330595A (en) * | 1994-08-17 | 1996-03-07 | John S. Fox | Method and apparatus for magnetically detecting proteins and nucleic acids |
US6037167A (en) * | 1994-10-03 | 2000-03-14 | Ericomp | Magnetic polynucleotide separation and analysis |
AU4428497A (en) * | 1996-09-20 | 1998-04-14 | James P. Demers | Spatially addressable combinatorial chemical arrays in cd-rom format |
US6046585A (en) * | 1997-11-21 | 2000-04-04 | Quantum Design, Inc. | Method and apparatus for making quantitative measurements of localized accumulations of target particles having magnetic particles bound thereto |
DE69832817T2 (de) * | 1997-12-30 | 2006-09-14 | Jose Remacle | Verfahren mit auf einer disc-oberfläche gebundenen einfangsmolekül |
WO2000046600A2 (de) * | 1999-02-03 | 2000-08-10 | Europäisches Laboratorium für Molekularbiologie (EMBL) | Verfahren zum nachweis von analyten in einer messprobe sowie messträger hierfür |
-
1999
- 1999-11-19 JP JP32994599A patent/JP2001147230A/ja active Pending
-
2000
- 2000-11-15 WO PCT/JP2000/008050 patent/WO2001038875A1/ja not_active Application Discontinuation
- 2000-11-15 EP EP00976259A patent/EP1146338A4/en not_active Ceased
- 2000-11-15 US US09/889,747 patent/US6787349B1/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10506786A (ja) * | 1994-10-03 | 1998-07-07 | アデルマン,ロニィ,ダブリュ | ポリヌクレオチド及びポリペプチドの分離、配列決定及び増幅における磁化可能な部分、並びにその磁気検出 |
JPH11508031A (ja) * | 1995-03-01 | 1999-07-13 | シェリング アクチェンゲゼルシャフト | 残留磁気を利用する検出のための方法及び化合物並びにそれらの利用 |
JPH1194747A (ja) * | 1997-09-19 | 1999-04-09 | Hitachi Software Eng Co Ltd | バイオチップ及びバイオチップ読取り装置 |
Also Published As
Publication number | Publication date |
---|---|
EP1146338A1 (en) | 2001-10-17 |
JP2001147230A (ja) | 2001-05-29 |
EP1146338A4 (en) | 2004-09-22 |
US6787349B1 (en) | 2004-09-07 |
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