WO2003012410A1 - Procede de detection au niveau d'un support solide d'une complexation ou d'une hybridation entre au moins deux molecules base sur un signal amplifie au niveau du support - Google Patents
Procede de detection au niveau d'un support solide d'une complexation ou d'une hybridation entre au moins deux molecules base sur un signal amplifie au niveau du support Download PDFInfo
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- WO2003012410A1 WO2003012410A1 PCT/FR2002/002781 FR0202781W WO03012410A1 WO 2003012410 A1 WO2003012410 A1 WO 2003012410A1 FR 0202781 W FR0202781 W FR 0202781W WO 03012410 A1 WO03012410 A1 WO 03012410A1
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- 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
- G01N33/54393—Improving reaction conditions or stability, e.g. by coating or irradiation of surface, by reduction of non-specific binding, by promotion of specific binding
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- 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
- B01L3/508—Containers for the purpose of retaining a material to be analysed, e.g. test tubes rigid containers not provided for above
- B01L3/5085—Containers for the purpose of retaining a material to be analysed, e.g. test tubes rigid containers not provided for above for multiple samples, e.g. microtitration plates
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- 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
- C12Q1/6809—Methods for determination or identification of nucleic acids involving differential detection
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
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- 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
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- 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
- B01J2219/00529—DNA chips
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- 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
- B01J2219/0054—Means for coding or tagging the apparatus or the reagents
- B01J2219/00572—Chemical means
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- 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
- B01J2219/00781—Aspects relating to microreactors
- B01J2219/00783—Laminate assemblies, i.e. the reactor comprising a stack of plates
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- 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
- B01J2219/00781—Aspects relating to microreactors
- B01J2219/0095—Control aspects
- B01J2219/00952—Sensing operations
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- 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
- B01J2219/00781—Aspects relating to microreactors
- B01J2219/0095—Control aspects
- B01J2219/00952—Sensing operations
- B01J2219/00968—Type of sensors
- B01J2219/0097—Optical sensors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/08—Geometry, shape and general structure
- B01L2300/0809—Geometry, shape and general structure rectangular shaped
- B01L2300/0819—Microarrays; Biochips
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- C—CHEMISTRY; METALLURGY
- C40—COMBINATORIAL TECHNOLOGY
- C40B—COMBINATORIAL CHEMISTRY; LIBRARIES, e.g. CHEMICAL LIBRARIES
- C40B70/00—Tags or labels specially adapted for combinatorial chemistry or libraries, e.g. fluorescent tags or bar codes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/00029—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor provided with flat sample substrates, e.g. slides
- G01N2035/00099—Characterised by type of test elements
- G01N2035/00158—Elements containing microarrays, i.e. "biochip"
Definitions
- the present invention relates to the detection of biological molecules by the use of an amplification method with improved yield.
- the recognition of a target biological molecule by a recognition molecule specific for this target biological molecule is a property commonly used in the field of diagnostics. Many biological molecules (DNA, RNA, protein, antibody, antigen) are thus currently detectable and quantifiable thanks to these recognition methods. Techniques comparable to those used for the detection of biological molecules are also used in the food industry to detect the presence of microorganisms such as bacteria.
- the first step in these detection techniques is to fix the recognition molecule on a support.
- the support which is used to fix the recognition molecules is generally a flat or porous surface composed of materials, such as:
- the recognition molecule can be respectively constituted by another DNA, an RNA, an oligonucleotide (or ODN), or by an antigen, an antibody.
- Printing is an adaptation of the process used by inkjet printers. It is based on the propulsion of very small spheres of fluids (volume ⁇ 1 ni) and at a rate of up to 4000 drops / second. Printing does not involve any contact between the system releasing the fluid and the surface on which it is deposited.
- Micro-deposition consists in fixing probes long from a few hundred to several hundred bases on the surface of a glass slide. These probes are generally extracted from databases and come in the form of amplified and purified products. This technique makes it possible to produce microarrays with approximately ten thousand DNA spots on a surface of just under 4 cm 2 . However, do not forget the use of nylon membranes, say
- Macroarrays which carry amplified products, generally by PCR, with a diameter of 0.5 to 1 mm and the maximum density of which is 25 spots / cm 2 . This very flexible technique is used by many laboratories. In the present invention, the latter technique is considered to be part of the biochips.
- the second technique for attaching the probes to the support is called in situ synthesis.
- This technique results in the development of short probes directly on the surface of the chip. It is based on the synthesis of oligonucleotides in situ invented by Edwin Southern, and is based on the process of synthesizers of oligonucleotides, it consists in moving a reaction chamber, where the elongation reaction of oligonucleotides takes place, along of the glass surface.
- Photolithography is a process behind the biochips developed by Affymetrix.
- Photolithography is derived from microprocessor techniques.
- the surface of the chip is modified by the fixing of photolabile chemical groups which can be activated by light. Once illuminated, these groups are likely to react with the 3 'end of an oligonucleotide.
- photolabile chemical groups which can be activated by light. Once illuminated, these groups are likely to react with the 3 'end of an oligonucleotide.
- masks of defined shapes By protecting this surface with masks of defined shapes, one can illuminate and therefore selectively activate areas of the chip where one wishes to fix one or the other of the 4 nucleotides.
- the successive use of different masks makes it possible to alternate protection / reaction cycles and therefore to produce the probes of oligonucleotides on spots of around a few tens of square micrometers ( ⁇ m 2 ).
- Photolithography has advantages: massively parallel, it makes it possible to create a chip of N-mothers in only 4 x N cycles.
- the second step in these detection techniques is to specifically hybridize a target molecule to the recognition molecule. Note that it is also possible to form the hybrid recognition molecule / target molecule before fixing to the support.
- the third step of these detection techniques is either to use an already labeled target molecule or to hybridize a detection molecule to the target molecule.
- the target molecule is marked beforehand.
- labeling techniques have so far been described in the literature.
- the Applicant has already filed a patent application, WO-A-99/65926 under priority of June 17, 1998, on a labeling of nucleic acids which is coupled to the fragmentation of these.
- Another conventional labeling technique consists in grafting a fluorescent label onto the target molecule. After excitation of the marker, a light signal is emitted, and can be detected and analyzed by fluorescence microscopy or by luminometry.
- the detection limit by fluorescence is of the order of 10 "9 to 10 " 10 mole per liter (mol / 1) of labeled additional oligonucleotides, Lu, Hua. Characterization of DNA hybridization on the optical fiber surface Colloids and Surfaces A: Physiochemical and Engineering Aspects - Vol. 175, Issues 1: p. 147-152. 15 Dec. 2000.
- a comparable technique consists in grafting a radioactive marker onto the detection probe. This technique is commonly used, in particular for the detection of DNA or RNA. Signal quantification is done by autoradiography, by a photographic plate sensitive to X-rays. Chemiluminescence is another more recent marking technique.
- the labeling is carried out chemically with a chemiluminescent compound.
- chemiluminescent markers have already been described in the prior art such as luminol, lucigenin, anthracene, rubene.
- the chemiluminescent compound is brought to an excited state.
- the excitation is carried out by modification of the pH (luminol, lucigenin) or by the presence of peroxyoxalate (anthracene, rubene). This excited compound then emits radiation in the visible, allowing the detection of the probe / target complex, by luminometry.
- the detection can also be done by electrochemiluminescence, as is notably developed in patent WO-A-98/12539.
- the marker is electrically excited, which leads to the emission of a photon, detectable by luminometry.
- electrochemistry the detection limit is higher than when using fluorescent markers and can reach approximately 10 "12 to 10 " 13 mole of DNA sought in the context of DNA detection.
- Another technique finally calls for a modification of the electrochemical signature of a conjugated polymer carrying the probe, during the hybridization of the recognition molecule / target molecule complex.
- an electrically conductive and electroactive conjugated polymer linked to a first biological molecule is used to detect or specifically assay a second biological molecule (target molecule).
- the latter is then detected electrically, by measuring a potential difference between the conjugated polymer not linked to the target molecule and the conjugated polymer linked to the target molecule.
- a comparable study is presented in patent application WO-A-00/77523.
- the target molecule is then labeled indirectly by specific hybridization of a detection molecule.
- Biochip means a chip or a support having on its surface a plurality of recognition zones, equipped with molecules having recognition properties. In the remainder of the text, and for abuse of language, the term biochip is used regardless of the destination of the chip for chemical or biological analysis.
- the present invention finally relates to hybrids or complexes which can be used on such biochips.
- the biochip method is based on the use of probes (DNA sequences representing a portion of a gene or an oligonucleotide), fixed on a solid support on which a sample of nucleic acids labeled directly or indirectly with fluorochromes.
- the probes are positioned specifically on the chip and each hybridization provides information on each gene represented. This information is cumulative, and makes it possible to detect the presence of a gene or to quantify the level of expression of this gene in the tissue studied.
- the chip is washed, read by a scanner and the analysis of the fluorescence is processed by computer.
- Micam chips registered trademark
- Micam chips have an effective surface of less than 2 mm 2 .
- the limit of detection by fluorescence ie the number of photons that one is able to distinguish corresponds to approximately 10 "9 to 10 " 10 mole.
- the detection limit can reach approximately 10 " to 10 " mole.
- signal processing techniques could reduce these detection limits by a factor of 10 or even 100, the expected values are obviously far below the wishes of researchers and practitioners to characterize in particular a few tens or hundreds of copies in DNA analysis in solution.
- the invention proposes to respond to all of the drawbacks of the state of the art.
- the present invention relates to a method of detecting at the level of a solid support a complexation or a hybridization between at least two molecules, one of the molecules being initially fixed on the support, called recognition molecule , and the other being in solution in a liquid sample, called the target molecule, consisting of:
- the chemical or biological element releases at least one photon during excitation.
- the amplified signal is produced by a metallic precipitate, preferably by a precipitate of silver halide.
- the detection is carried out by electrical detection, and / or luminometry, and / or fluorometry, and / or radiometry, and / or photodiode.
- the invention also relates to a solid support for detecting complexation or hybridization between at least two molecules, one of the molecules being in contact with the support, called the recognition molecule, and the other being in solution in a liquid sample, called the target molecule, consisting of a wall made of a transparent material comprising:
- the invention also relates to a solid support for detecting complexation or hybridization between at least two molecules, one of the molecules being in contact with the support, called the recognition molecule, and the other being in solution in a liquid sample, called a target molecule, the attachment of complexes or hybrids and the means of chemical amplification of a light signal coming from a chemical or biological element, specifically linked to the complex or to the hybrid formed are on the same face of the support.
- the face of the support which carries the means for chemical amplification of a light signal, also carries means for detecting the amplified signal.
- the support is of thin thickness between 0.1 ⁇ m and 100 ⁇ m, preferably between 0.5 ⁇ m and 10 ⁇ m, and even more preferably 1 ⁇ m.
- the support is in the form of a substantially parallelepiped.
- the second face of the support is attached to an analysis card, the space between the two elements circumscribing the means for amplifying the light signal and / or the means for detecting the chemical signal.
- the chemical or biological element constitutes all or part of one of the two recognition or target molecules or consists of an atom or a detection molecule initially carried by one of said two recognition or target molecules.
- the element consists of an atom or a group of atoms attached to one of the two recognition or target molecules.
- all the recognition molecules which are structurally or functionally identical, that is to say which hybridize or complex with the same target molecules, are grouped together in a recognition zone; the support being able to contain at least two recognition zones, preferably between one hundred and one million recognition zones and even more preferably from three hundred to one thousand recognition zones.
- each recognition zone is associated with amplification means which are specific to it, or which are common with all or part of the other recognition zones of the support.
- the amplification means cover all or part of the face of the support where they are implanted.
- the means for amplifying the light signal consist of a metallic layer, preferably a layer of silver, which gives a metallic precipitate preferably of silver in the presence of at least one photon. .
- the means for detecting the amplified signal or signals are constituted by a matrix electrical network.
- the support and / or the recognition zones is / are made of glass or of polymer or of silica.
- the invention also relates to a biochip incorporating a support according to the invention described in the preceding paragraph. Preferably, the biochip is used in a diagnostic test.
- FIG. 1 represents a partial perspective view of an analysis card according to the invention.
- 2 shows a sectional view along A-A of Figure 1, the upper part of the analysis card being in place.
- FIG. 3 represents a partial perspective view of an analysis card according to the invention, highlighting the matrix electrical network, seen in transparency.
- FIG. 4 represents a sectional view of a support according to the invention, after complexation of a recognition molecule on its external surface.
- FIG. 5 represents a sectional view of a support according to the invention, after hybridization of a target molecule on the recognition molecule already complexed on the external surface of the support.
- FIG. 6 represents a sectional view of a support according to the invention, after hybridization of a detection molecule on the hybrid between a target molecule and a recognition molecule already complexed on the external surface of the support.
- the biochip method is based on the use of probes (DNA sequences representing a portion of a gene or an oligonucleotide), fixed on a solid support on which a sample of nucleic acids labeled directly or indirectly with fluorochromes.
- the probes are positioned specifically on the chip and each hybridization provides information on each gene represented. This information is cumulative, and makes it possible to detect the presence of a gene or to quantify the level of expression of this gene in the tissue studied.
- the chip is washed, read by a scanner and the analysis of the fluorescence is processed by computer.
- the support used to fix the probes generally consists of a flat or porous surface composed of materials, such as:
- Printing is an adaptation of the process used by inkjet printers. It is based on the propulsion of very small spheres of fluids (volume ⁇ 1 ni) and at a rate of up to 4000 drops / second. Printing does not involve any contact between the system releasing the fluid and the surface on which it is deposited.
- Micro-deposition consists in fixing probes long from a few hundred to several hundred bases on the surface of a glass slide. These probes are generally extracted from databases and come in the form of amplified and purified products. This technique makes it possible to produce microarrays with approximately ten thousand DNA spots on a surface of just under 4 cm 2 . However, do not forget the use of nylon membranes, say
- Macroarrays which carry amplified products, generally by PCR, with a diameter of 0.5 to 1 mm and the maximum density of which is 25 spots / cm 2 . This very flexible technique is used by many laboratories. In the present invention, the latter technique is considered to be part of the biochips.
- the second technique for attaching the probes to the support is called in situ synthesis. This technique results in the development of short probes directly on the surface of the chip. It is based on the synthesis of oligonucleotides in situ invented by
- Edwin Southern is based on the process of oligonucleotide synthesizers, it consists in moving a reaction chamber, where the elongation reaction of oligonucleotides takes place, along the glass surface.
- Photolithography is a process behind the biochips developed by Affymetrix.
- Photolithography is derived from microprocessor techniques. The surface of the chip is modified by the fixing of photolabile chemical groups which can be activated by light.
- Methods using biochips can essentially be of two different natures. On the one hand, they can be processes for:
- the network of the chip carries very many probes which correspond to all the genes of the species to be studied.
- a sample for example of mRNA which represents the active genes of the tissue, is hybridized. Fluorescence analysis makes it possible to know the level of expression of each gene.
- biochips have been tested on well-known biological systems such as yeast (cell cycle, respiratory metabolism, fermentation ).
- yeast cell cycle, respiratory metabolism, fermentation
- the recognition molecules can be, for example, ohgonucleotides, polynucleotides, proteins such as antibodies or peptides, lectins or any other system of the ligand-receptor type.
- the recognition molecules can comprise fragments of DNA or RNA.
- the recognition molecules are capable of interacting, for example by hybridization in the case where it is nucleic acids or by complexation in the case where it is antibody and antigen, with target molecules present in a liquid biological sample.
- each recognition zone comprises only one type of recognition molecules which are identical to each other.
- the support-recognition molecule-target molecule-detection molecule assembly constitutes a sandwich test
- Sandwich tests are widely used in diagnostics, whether in molecular diagnostics, for example ELOSA test (Enzyme-Linked Oligo-Sorbent Assay), or in immunological diagnostics, for example ELISA test (Enzyme-Linked Immuno-Sorbent Assay) .
- they comprise a recognition molecule, such as a nucleic acid probe or an antigen (in the case of an antigen sandwich) or an antibody (in the case of an antibody sandwich), which is used to capture a target, which will be respectively constituted by a nucleic acid probe or an antibody or an antigen.
- This recognition molecule is fixed on a solid support in a manner known to a person skilled in the art, either by adsorption, or by direct coupling, or by means of an intermediate protein, such as for example avidin or protein A.
- the combination of recognition molecule and target molecule is then detected by a detection molecule, which will respectively consist of a nucleic acid probe or an antibody or an antigen.
- This detection molecule carries or may be subsequently associated with a marker, a marker which is necessary to allow detection and / or quantification.
- the detection molecule whether or not it is still associated with a marker will always be called the detection molecule.
- the binding of a nucleic acid to another nucleic acid is called hybridization, while the binding of an antibody to an antigen is called complexation.
- the tests currently available are tests such as those developed by one of the Applicants for immunoassays or DNA chips developed by the company Affymetrix ("Accessing Genetic Information with High-Density DNA arrays", M. Shee and al., Science, 274, 610-614. "Light-generated oligonucleotide arrays for rapid DNA sequence analysis", A. Caviani Pease et al., Proc. Natl. Acad. Sci. USA, 1994, 91, 5022-5026) , for molecular diagnostics. In this technology, the capture probes are generally of reduced size, around twenty nucleotides.
- a capture oligonucleotide is defined in the same way, a nucleic acid target which is either DNA or TARN, and a detection oligonucleotide.
- the capture and detection ohgonucleotides are complementary to part of the target but at regions of the target which are structurally and physically different respectively, so that the capture and detection ohgonucleotides cannot hybridize to one another. one to another.
- the detection elements carry a marker which allows the detection and / or quantification of the target.
- markers In the state of the art, various markers have been developed with the permanent objective of improving sensitivity. They can either be radioactive, either enzymatic, fluorescent or in the form of microparticles or nanoparticles.
- markers is intended to mean the attachment of a marker capable of directly or indirectly generating a detectable signal. A non-exhaustive list of these markers follows:
- the enzymes which produce a detectable signal for example by colorimetry, fluorescence, luminescence, such as horseradish peroxidase, alkaline phosphatase, ⁇ -galactosidase, glucose-6-phosphate dehydrogenase,
- chromophores such as fluorescent, luminescent, dye compounds, “groups with electron density detectable by electron microscopy or by their electrical property such as conductivity, amperometry, voltametry, impedance,
- detectable groups for example whose molecules are large enough to induce detectable changes in their physical and / or chemical characteristics
- this detection can be carried out by optical methods such as diffraction, surface plasmon resonance, variation of surface, variation of contact angle or physical methods like atomic force spectroscopy, tunnel effect,
- the marker is essentially constituted by a group capable of providing a photon.
- Indirect systems can also be used, such as for example ligands capable of reacting with an anti-ligand.
- ligands capable of reacting with an anti-ligand.
- the ligand / anti-ligand pairs are well known to those skilled in the art, which is the case for example of the following couples: • biotin / streptavidin,
- sugar / lectin • polynucleotide / complementary to the polynucleotide.
- ligand which carries the binding agent.
- the anti-ligand can be detectable directly by the markers described in the preceding paragraph or be itself detectable by a ligand / anti-ligand.
- FIG. 1 it can be seen in FIG. 1 that the invention relates to an analysis card 1, of which only the first so-called basic part 17 is shown.
- the latter 1 has on one of its flat faces a certain number of recognition zones 14, which together constitute a support 3.
- the support 3 very largely absorbs ultraviolet but is transparent in the visible. For this, said glass support 3 is previously loaded with lead.
- the support 3 is itself deposited within the analysis card 1, which can also be made of glass, or of a suitable plastic.
- This card 1 as shown in Figure 2 consists of two parts, the first part called base 17, already mentioned above, and a second part constituted by a cover 16, which delimit, together with the supports 3, a space 18 where a liquid sample to be tested 2 can be introduced via any means of the state of the art known to those skilled in the art.
- the nature and operation of this signal amplification means 5 will be described later.
- FIG. 3 allows a better understanding of the base part from the inside 17. It comprises in this figure a number of supports 3, each associated with a reservoir 4 and with a signal amplification means 5, itself associated to an upstream electrical terminal 6 and a downstream electrical terminal 7. All of the upstream electrical terminals 6 are in the perpendicular position of all of the downstream electrical terminals 7 without contact between these two assemblies, and jointly form a matrix electrical network 13.
- the cover 16 has not been shown and the recognition molecule 8, as well as the other molecules mentioned below which cooperate with it, were only represented in a single copy and in a stylized and enlarged manner.
- a recognition molecule 8 is deposited on one of the recognition zones 14 of a support 3 in ve ⁇ e, according to a conventional microdeposition technique, already mentioned previously. Of course, this fixing is carried out prior to the introduction into the space 18 of the sample 2 to be tested.
- FIG. 5 represents the next step which consists in allowing the hybridization on the recognition molecule 8 of a target molecule 9. This hybridization does not cause any modification at the level of the base part 17 of the map 1, including support 3.
- FIG. 6 shows the last biological step. It consists in allowing hybridization on the hybrid constituted by the recognition molecule 8 and the target molecule 9, of a third so-called detection molecule 10.
- this detection molecule 10 is an integral part of the target molecule 9, in which case this step has no reason to be since the detection will be possible as soon as the hybrid 8 and 9 is formed.
- the detection molecule 10 is a molecular group capable of specifically binding on the target molecule 9 or on the hybrid 8 and 9, and capable of giving at least one photon to give a light signal 11.
- This hybridization does not cause any modification at the level of the support 3.
- it causes a modification at the level of the reservoir 4 of the base part 17 of the card 1, and more precisely at the level of the chemical amplification means 5 of the signal luminous 1 1, which is constituted by a silver halide (AgX, such as AgCl, AgBr, etc.).
- AgX silver halide
- the light signal 11 will generate a precipitation of silver 15 within said reservoir 4. This precipitation will then close the electrical circuit between the upstream 6 and downstream 7 electrical terminals, which will allow the conduction of an electrical signal 12.
- the electrical network 13 of FIG. 3 will thus allow, by the matrix grid of micro-circuits in rows 6 and columns 7 to reveal or not appear at each intersection a precipitate, corresponding in coordinates, to the recognition molecules 8 having specifically hybridized target molecules 9 .
- the target molecule 9 is labeled with a fluorescent chemical element 10, according to a conventional labeling technique known to those skilled in the art.
- the hybrid 8 and 9 formed, linked to the fluorescent chemical element 10, is subjected to a global excitation by ultraviolet. Local emissions take place in the visible from the hybrid 8 and 9, forming a light signal 11. Unlike the excitation ultraviolet, this light signal 1 1 crosses the support 3, transparent in the visible and is transformed into chemical signal 15 by precipitation of the silver halide 5.
- the interaction of this light signal 11 and the silver halide 5 leads to the formation in the reservoir 4 of the chemical signal 15 comprising silver microcrystallites with regard to the hybrid 8 and 9 formed.
- These silver microcrystallites establish a contact between line and column of the matrix grid.
- the conductivity established between row and column, related to the size of the microcrystallites formed is directly related to the amount of light emitted, and therefore directly related to the amount of recognition molecules 8 and target molecules 9 hybridized.
- Chemical signal or metallic precipitate preferably silver
- Base part of the card 1 18. Space circumscribed by a support 3, the cover 16 and the base part 17
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- Biochemistry (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
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- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
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Abstract
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Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/485,328 US20040234991A1 (en) | 2001-08-01 | 2002-08-01 | Method for detecting at a solid support of complexing or hybridization between at least two basic molecules based on an amplified signal at the support |
| EP02779605A EP1412726A1 (fr) | 2001-08-01 | 2002-08-01 | Procede de detection au niveau d'un support solide d'une complexation ou d'une hybridation entre au moins deux molecules base sur un signal amplifie au niveau du support |
| JP2003517554A JP2004537722A (ja) | 2001-08-01 | 2002-08-01 | 少なくとも2個の基本的分子間の複合体形成又はハイブリダイゼーションを固体支持体上で該支持体における増幅信号に基づいて検出する検出方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0110302A FR2828284B1 (fr) | 2001-08-01 | 2001-08-01 | Procede de detection au niveau d'un support solide d'une complexation ou d'une hybridation entre au moins deux molecules base sur un signal amplifie au niveau du support |
| FR0110302 | 2001-08-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003012410A1 true WO2003012410A1 (fr) | 2003-02-13 |
Family
ID=8866170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2002/002781 Ceased WO2003012410A1 (fr) | 2001-08-01 | 2002-08-01 | Procede de detection au niveau d'un support solide d'une complexation ou d'une hybridation entre au moins deux molecules base sur un signal amplifie au niveau du support |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20040234991A1 (fr) |
| EP (1) | EP1412726A1 (fr) |
| JP (1) | JP2004537722A (fr) |
| FR (1) | FR2828284B1 (fr) |
| WO (1) | WO2003012410A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004081566A3 (fr) * | 2003-03-14 | 2004-12-02 | Apibio Sas | Procede et dispositif de detection de biomolecules |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4920553B2 (ja) * | 2006-11-08 | 2012-04-18 | 富士フイルム株式会社 | イムノクロマトグラフキット |
| KR100819006B1 (ko) * | 2007-02-13 | 2008-04-03 | 삼성전자주식회사 | 마이크로 어레이용 마스크 세트, 이의 제조 방법, 및마스크 세트를 이용한 마이크로 어레이의 제조 방법 |
| ITMI20110739A1 (it) * | 2011-05-03 | 2011-08-02 | Copan Information Technologies S R L | Apparecchiatura e procedimento per il trattamento di campioni di materiale biologico, microbiologico e/o chimico |
| CN111665238A (zh) * | 2019-03-08 | 2020-09-15 | 上海索昕生物科技有限公司 | 一种化学发光微阵列芯片的应用 |
| CN111665235A (zh) * | 2019-03-08 | 2020-09-15 | 上海索昕生物科技有限公司 | 一种化学发光微阵列芯片及其应用 |
| CN111665236A (zh) * | 2019-03-08 | 2020-09-15 | 上海索昕生物科技有限公司 | 一种发光微阵列芯片的制备方法及其应用 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2392003A (en) * | 1942-09-26 | 1946-01-01 | O W Wortman | Method and apparatus for detecting and measuring radiant energy such as light |
| SU1275226A1 (ru) * | 1985-04-25 | 1986-12-07 | Институт физики твердого тела АН СССР | Устройство дл регистрации светового излучени |
| WO2000043552A2 (fr) * | 1999-01-25 | 2000-07-27 | Ut-Battelle, Llc | Biocapteurs mulitispectre et multifonctions, et leurs procedes d'utilisation |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4197361A (en) * | 1977-08-23 | 1980-04-08 | Warner-Lambert | Fluorescent immunoassay sandwich technique for HBs Ag |
| US4739044A (en) * | 1985-06-13 | 1988-04-19 | Amgen | Method for derivitization of polynucleotides |
| US5202267A (en) * | 1988-04-04 | 1993-04-13 | Hygeia Sciences, Inc. | Sol capture immunoassay kit and procedure |
| US5294369A (en) * | 1990-12-05 | 1994-03-15 | Akzo N.V. | Ligand gold bonding |
| US6099803A (en) * | 1994-07-07 | 2000-08-08 | Nanogen, Inc. | Advanced active electronic devices for molecular biological analysis and diagnostics |
| EP0758403B1 (fr) * | 1994-05-05 | 1998-06-24 | Beckman Instruments, Inc. | Groupements repetes d'oligonucleotides |
| US6168948B1 (en) * | 1995-06-29 | 2001-01-02 | Affymetrix, Inc. | Miniaturized genetic analysis systems and methods |
| DE19615771A1 (de) * | 1996-04-20 | 1997-10-23 | Hymmen Theodor Gmbh | Doppelbandpresse zum Herstellen und/oder zum Beschichten von bahn- oder plattenförmigen Werkstücken aller Art |
| US6043342A (en) * | 1997-11-10 | 2000-03-28 | Beth Israel Deaconess Medical Center | PDZK1 protein containing PDZ interaction domains |
| US6136541A (en) * | 1999-02-22 | 2000-10-24 | Vialogy Corporation | Method and apparatus for analyzing hybridized biochip patterns using resonance interactions employing quantum expressor functions |
| US20030096321A1 (en) * | 1999-05-19 | 2003-05-22 | Jose Remacle | Method for the identification and/or the quantification of a target compound obtained from a biological sample upon chips |
| US20010031469A1 (en) * | 2000-01-03 | 2001-10-18 | Stefano Volinia | Methods for the detection of modified peptides, proteins and other molecules |
| WO2002064837A1 (fr) * | 2001-02-14 | 2002-08-22 | University Of Maryland, Baltimore | Decroissance radiative modifiee |
-
2001
- 2001-08-01 FR FR0110302A patent/FR2828284B1/fr not_active Expired - Fee Related
-
2002
- 2002-08-01 US US10/485,328 patent/US20040234991A1/en not_active Abandoned
- 2002-08-01 EP EP02779605A patent/EP1412726A1/fr not_active Withdrawn
- 2002-08-01 JP JP2003517554A patent/JP2004537722A/ja active Pending
- 2002-08-01 WO PCT/FR2002/002781 patent/WO2003012410A1/fr not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2392003A (en) * | 1942-09-26 | 1946-01-01 | O W Wortman | Method and apparatus for detecting and measuring radiant energy such as light |
| SU1275226A1 (ru) * | 1985-04-25 | 1986-12-07 | Институт физики твердого тела АН СССР | Устройство дл регистрации светового излучени |
| WO2000043552A2 (fr) * | 1999-01-25 | 2000-07-27 | Ut-Battelle, Llc | Biocapteurs mulitispectre et multifonctions, et leurs procedes d'utilisation |
Non-Patent Citations (1)
| Title |
|---|
| DATABASE WPI Derwent World Patents Index; AN 1987-226896, XP002196253 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004081566A3 (fr) * | 2003-03-14 | 2004-12-02 | Apibio Sas | Procede et dispositif de detection de biomolecules |
| US7879594B2 (en) | 2003-03-14 | 2011-02-01 | Biomerieux | Method and device for detecting biomolecules |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2828284A1 (fr) | 2003-02-07 |
| JP2004537722A (ja) | 2004-12-16 |
| US20040234991A1 (en) | 2004-11-25 |
| FR2828284B1 (fr) | 2003-10-31 |
| EP1412726A1 (fr) | 2004-04-28 |
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