WO2001086275A2 - Dispositif de capteur chimique - Google Patents
Dispositif de capteur chimique Download PDFInfo
- Publication number
- WO2001086275A2 WO2001086275A2 PCT/JP2001/003917 JP0103917W WO0186275A2 WO 2001086275 A2 WO2001086275 A2 WO 2001086275A2 JP 0103917 W JP0103917 W JP 0103917W WO 0186275 A2 WO0186275 A2 WO 0186275A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensor device
- detection
- reaction
- electrode
- area
- 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
- G01N33/54366—Apparatus specially adapted for solid-phase testing
- G01N33/54373—Apparatus specially adapted for solid-phase testing involving physiochemical end-point determination, e.g. wave-guides, FETS, gratings
- G01N33/5438—Electrodes
-
- 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
- G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
-
- 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
- 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
Definitions
- the present invention relates to a sensor device for quickly and specifically detecting analytes such as minute amounts of chemical substances, proteins, microorganisms, viruses, and the like, and a detection method using the same.
- an enzyme electrode type immunosensor As a conventional sensor device for detecting a minute amount of an analyte, an enzyme electrode type immunosensor is known.
- This sensor uses an immobilized antibody, a labeled antibody bound with an enzyme, and an electrode to detect an analyte bound to the immobilized antibody and the labeled antibody bound thereto as a detection target.
- the amount of the analyte is detected as a change in the current value, which redoxes the product generated in the enzymatic reaction by the electrode.
- Figure 2 shows a conventional enzyme electrode type immunosensor. As shown in FIG. 2, in the conventional enzyme electrode type immunosensor, the antibody 102 is immobilized on the entire bottom surface of the detection cell 101.
- the analyte (antigen) 103 in the sample diffuses through the solution in the cell, reaches the immobilized antibody 102, and specifically binds thereto.
- the labeled antibody 105 to which the enzyme 104 is bound further binds to the analyte 103, a complex in a sandwich state is formed.
- a reaction solution 106 containing substrate 107 for the enzymatic reaction is added.
- the substrate 107 is converted into an enzymatic reaction product 108 by the action of an enzyme, which is redox-reduced by the electrode 3 to detect an analyte.
- the potential of the electrode for oxidation-reduction is set to the potential based on the potential of the reference electrode provided in the reaction solution in the reaction solution.
- Such a conventional enzyme-electrode-type immunosensor has the advantage that the device configuration is relatively simple, but depending on the detection target, a practically sufficient detection speed and detection speed There is a problem that sensitivity cannot be obtained.
- Some sensor devices use a labeled antibody that is labeled with a fluorescent dye instead of an enzyme, but there is a problem in that the configuration is complicated to detect fluorescence.
- the present invention is to solve such a problem of the conventional sensor device, and an object of the present invention is to eliminate the above problems.
- the electrode potential for oxidation-reduction is set to a potential based on the potential of the placed reference electrode in the reaction solution.
- Such a conventional enzyme-electrode-type immunosensor has an advantage that the device configuration is relatively simple, but has a problem that a practically sufficient detection speed and detection sensitivity cannot be obtained depending on a detection target. ing.
- Some sensor devices that use a labeled antibody that is labeled with a fluorescent dye instead of an enzyme have the problem that the configuration is complicated to detect certain fluorescent light.
- the present invention is to solve such a problem of the conventional sensor device, and has an object to eliminate the problem as described above.
- the present invention relates to a sensor device including at least one support for immobilizing a detection target, and a cell for containing a solution in which a reaction product of the detection target diffuses.
- the sensor device forms at least one reaction region having a constant concentration by diffusing the reaction product into the solution, and the reaction region forms the reaction product within a predetermined measurement time. It is designed to be specifically detected.
- the sensor device according to the invention comprises a plurality of reaction zones.
- the plurality of reaction zones can be formed by different reaction products.
- the sensor device of the present invention may further include a detection unit.
- the detection object can be fixed by fixing means.
- the detection means has a detection region, and the detection region may include the reaction region.
- the detection means has a detection region, and this detection region may overlap with the reaction region.
- the detection means may have a detection region, and the detection region may be included in the reaction region.
- the support may be a specific area on a substrate.
- the support may be a particle or a rod.
- the measurement time may be 30 minutes, more preferably 10 minutes, more preferably 5 minutes, even more preferably 3 minutes, and most preferably 1 minute.
- the detection means may be a detection means capable of measuring light or heat.
- the detection means may be at least one electrode.
- the electrode can act on the reaction product to convert it into an electrical signal corresponding to the amount of the reaction product.
- the detection target may be an enzyme, and the reaction product may be an enzyme reaction product.
- the detection target may be an enzyme bound to an antibody or a peptide.
- the fixing means may be an antigen or an antigen-antibody complex.
- the detection target may be an enzyme bound to a first antibody bound to an antigen
- the immobilization means may be a second antibody
- the detection target is immobilized in an area having a diameter of several tens to several hundreds of microns
- the detection means may be an electrode having a diameter of 1 mm or less.
- the electrode when the detection target is measured, the electrode may approach an area where the detection target is immobilized.
- the electrode is arranged on the support, and the object to be detected can be immobilized in an area having a diameter of several tens to several hundreds of microns on the electrode.
- the detection target is immobilized in an area having a diameter of several tens to several hundreds of microns on the support, and the electrodes can be arranged so as to surround this area.
- the support may be a material selected from the group consisting of glass, ceramics, noble metals, and resins.
- the sensor device of the present invention may further include a means for promoting the immobilization of the detection target.
- the facilitating means may agitate the solution in the cell. In one embodiment, the facilitating means may replace the solution in the cell. In one embodiment, the facilitating means may supply a solution into the cell. In one embodiment, the facilitating means may cause a solution to flow through the cell.
- FIG. 1 schematically shows the sensor device of the present invention.
- FIG. 2 schematically shows a conventional immunosensor device.
- FIG. 3 schematically shows the principle of the present invention.
- FIG. 4A schematically illustrates the principle of the present invention.
- FIG. 4B shows a graph illustrating the principles of the present invention.
- FIG. 4C shows a graph illustrating the principle of the present invention.
- FIG. 5 shows an outline of an embodiment of the present invention.
- FIG. 6 shows an outline of an embodiment of the present invention.
- FIG. 7 shows an outline of an embodiment of the present invention.
- FIG. 8 shows an example of the support used in the present invention.
- FIG. 9 shows an example of the support used in the present invention.
- FIG. 10 schematically shows an embodiment of the present invention.
- FIG. 11 schematically shows an embodiment of the present invention.
- FIG. 12 schematically shows an embodiment of the present invention.
- FIG. 13 schematically shows an embodiment of the present invention.
- FIG. 14 schematically shows an embodiment of the present invention.
- FIG. 15 schematically shows an embodiment of the present invention.
- FIG. 16 schematically shows an embodiment of the present invention.
- FIG. 17 shows the outline of the measurement principle of the sensor device of the present invention.
- FIG. 18 shows a graph showing the relationship between the electrode width and the electrode stabilization time.
- FIG. 19 is a graph showing the relationship between the electrode diameter and the electrode sensitivity.
- FIG. 20 shows a graph showing the relationship between the measurement time and the output current for electrodes having different widths.
- FIG. 21A is a plan view of the sensor device of the present invention.
- FIG. 21B is an enlarged view of an electrode portion of the sensor device of the present invention.
- FIG. 22 is a plan view of the sensor device of the present invention.
- FIG. 23 is a view showing a resist pattern used for manufacturing the sensor device of the present invention.
- FIG. 24 is a sectional view of the sensor device of the present invention.
- FIG. 25 is a plan view of the sensor device of the present invention.
- the present invention relates to a sensor device comprising at least one support for immobilizing an object to be detected and a cell for containing a solution in which a reaction product of the object to be detected is diffused.
- the substance diffuses into the solution to form at least one reaction region having a constant concentration, and the reaction region is formed such that the reaction product is specifically detected within a predetermined measurement time. Is formed.
- FIG. 1 shows an example of Embodiment 1 of the present invention.
- the same reference numerals as those in the conventional example denote the same reference numerals in the figure for ease of understanding.
- the antibody 102 is immobilized on a part of the bottom surface of the detection cell 101.
- the region to which the antibody is immobilized is limited to a size having a diameter of 1 Oim to 100 m. Thereby, the detection of the enzyme reaction product by the electrode can be performed quickly and specifically.
- the reaction between the labeling enzyme and the substrate, and the resulting enzyme reaction product by limiting the region on which the antibody is immobilized to a small range of a size of 10 10 // 111 to 10 10 in diameter, the reaction between the labeling enzyme and the substrate, and the resulting enzyme reaction product.
- the cycling reaction from the reaction between the enzyme and the substrate to the oxidation-reduction reaction of the enzyme reaction product so that the progress of the oxidation-reduction reaction by the electrode does not depend on the diffusion rate of each of the above substances in the solution. was completed within a small area. This allows for rapid and specific detection of enzyme reaction products.
- the detection area of the electrode is almost the same size as the area on which the antibody is immobilized, so that noise components generated from areas other than the area where the antibody is immobilized are hardly detected, and the antibody is immobilized.
- SZN signal to noise
- the antibody-immobilized region has a diameter of 10 m in order to precisely prepare the region on which the antibody is to be immobilized, and to precisely arrange the electrodes corresponding to this region. It is appropriate to have a size of ⁇ 100 m. If the area where the antibody is immobilized is smaller than this, it is difficult to accurately arrange the electrode corresponding to this area. If the area over which the antibody is immobilized is wider than this, it may take tens of minutes to several hours for the reaction area of the enzyme reaction product to form, as described in connection with Figure 3 below. Become. Therefore, as shown in this embodiment, the rapidity and specificity of the measurement are maintained while maintaining the advantage of the enzyme electrode type immunosensor device, that is, the advantage of “simplified configuration and quickness”. In order to achieve this, the area for immobilizing the antibody is limited to a size of 10/11 to 100 m in diameter.
- the antibody was immobilized on the support, but the immobilization on the support may be an antigen or an antibody depending on the purpose.
- the analyte is a labeled antibody that binds to the analyte or an enzyme that is linked to the analyte via the antibody.
- FIG. 3 is a diagram schematically illustrating the principle of the present invention. Although the present invention is not bound by any principle, the present invention will be described with reference to FIG. 3 to facilitate understanding of the present invention.
- the left column in Fig. 3 shows the reaction product (for example, enzyme reaction product) generated in the area 2 where the detection target is immobilized on the substrate 1, which is the support, diffused into the solution to form the reaction area 5.
- FIG. 3 is a diagram showing the appearance of the reaction over time (after 1 second, 100 seconds, and 100 seconds after the reaction).
- the reaction zone 5 may be, for example, about 1 O ⁇ m thick one second after the reaction, about 100 thick 100 seconds after the reaction, and about 100 m thick 100 seconds after the reaction. Layer. Since the reaction in the reaction zone continues as long as the reaction substrate is supplied from the solution, the reaction product is generated in the reaction zone and the equilibrium of diffusion from the reaction zone into the solution results in a predetermined time (usually, At this time, a region 5 'having a substantially constant size and a constant reaction product concentration is formed.
- the term "anti- The “reaction region” typically refers to a region 5 ′ in which the concentration of the reaction product is constant after a predetermined time from when the reaction substrate is added and the reaction starts (that is, the diffusion of the reaction product starts). Used for
- FIG. 4C shows the size of this reaction region, theoretically, as a function of time in terms of distance from the reaction site.
- the size of the reaction region is shown using the example of semi-infinite diffusion of hydrogen ions in an aqueous solution.
- the reaction region can be considered to be a region surrounded by a surface where the hydrogen ion concentration is constant after a predetermined time from the start of diffusion.
- the measurement time is 30 minutes
- the size of the reaction area is 0.6 to 0.7 mm thick based on the reaction site, that is, the diffusion start point, and 0.3 to 0.3 minutes when the measurement time is 10 minutes.
- measurement time is 5 minutes
- measurement time is 3 minutes
- measurement time is 1 It can be seen that the thickness is about 0.1 mm in minutes.
- the right column of FIG. 3 is a diagram showing the state until the detection means 3, for example, the electrode operates stably, with time corresponding to the left column of FIG.
- the thickness of the detection area 7 for detecting the detection target is It grows over time and requires a certain amount of time to operate stably.
- the thickness of the reaction zone 7 becomes almost constant about 100 seconds after the start of operation (indicated by 7 'in the right side of Fig. 3).
- detection area of the detection means used in the present invention is typically used to mean the detection area 7, which has a substantially constant size.
- the region 2 on which the antibody is immobilized is limited to a size of 10 to 100 m in diameter, and the detection region 7 ′ and the reaction region 5 ′ are capable of rapidly reacting the reaction product. It is configured to be arranged in a relative positional relationship for specifically detecting. Therefore, the detection area 7 'can be arranged to include or overlap the reaction area 5'. Alternatively, the detection area 7 'can be arranged to be included in the reaction area 5'.
- the antibody used in the present invention can be immobilized on a support by a method well known to those skilled in the art. Antibodies can be immobilized at high densities in defined areas without compromising their function. By roughening the surface smoothness of the support by physical or chemical means, the immobilization density of the antibody can be increased. Further, by treating the support with an appropriate surface treatment reagent, the immobilization density of the antibody can be increased.
- the reaction region and the electrode are configured to face each other.
- the reaction region and the electrode may be formed on the same support.
- an example of an immunosensor for detecting an antigen-antibody reaction by an enzymatic reaction has been described.
- the present invention is not limited to this.
- a microbial activity detection sensor device may be used in which cells are immobilized and their activity is detected by a change in oxygen concentration in the vicinity.
- the sensor device of the present invention may be a protein sensor device that specifically captures and detects an analyte in a sample by a reaction other than the antigen-antibody reaction.
- the sensor device of the present invention may be a toxin sensor that detects a toxin or the like in a sample using a synthetic lipid membrane or the like as a support.
- FIG. 5 shows an outline of an embodiment of the present invention.
- the reaction region 5 ′ and the detection region 7 ′ are arranged so as to detect the reaction product quickly and specifically.
- the detection means 3 may be arranged so as to face the immobilization area 2 on the support 1 (FIG. 5 (c); Embodiment 1). It may be arranged on the support or in the support (FIG. 5 (b); Embodiment 2), or may be arranged on the support adjacent to the reaction region 2 (FIG. 5 (a); Embodiment 2). 3).
- FIG. 6 is a schematic diagram showing Embodiment 2 of the present invention (the device shown in the lower part of FIG.
- Embodiment 1 of the present invention the device shown in the upper part of FIG. 6
- the detection means 113 is installed in the substrate, and the detection object 115 is fixed thereon via the fixing means 117.
- the concentric ellipse shown in the figure is the detection area of the detection means 113.
- FIG. 7 is a schematic diagram showing Embodiment 4 of the present invention (a sensor device using a support other than a substrate; a device shown below FIG. 7) in comparison with Embodiment 1 of the present invention.
- the detection object 115 is fixed to, for example, a particulate support 120 other than the substrate indicated by the circle in the figure via the fixing means 117.
- the ellipse shown in the figure is the detection area of the detection means 113.
- the particulate support 120 may have a plurality of forces shown as one particle disposed on the bottom surface 121 of the cell.
- Embodiment 4 of the present invention may include a tubular cell that contains a plurality of particulate supports.
- the particulate support may be arranged in a cell as a plurality of masses (left of FIG. 8), or a means for collecting the particulate support in a specific area in the device 11 6 (right in Fig. 8).
- FIG. 9 schematically shows the particulate support 120 and the rod-like support 112 together with the detection target 115 fixed through the fixing means 117.
- the device of the present invention may include any detection means known in the art depending on the purpose.
- FIG. 10 schematically shows Embodiment 5 of the present invention using CCD as a detection means.
- the reaction products in the reaction region are emitted from the ultraviolet light emitted from the light source 201, and the light emitted from the ultraviolet light is collected by the glass fiber 202 and detected by the CCD 204.
- FIG. 11 schematically shows Embodiment 6 of the present invention.
- the reaction product in the reaction region is collected by the glass fiber 102 and the lens 203 and the light emitted by itself is detected by the CCD 204.
- FIG. 12 schematically shows Embodiment 7 of the present invention.
- the reaction product in the reaction region is collected by a lens 203 as heat generated by itself, and detected by a pyroelectric sensor 205.
- FIG. 13 shows a modification of the second embodiment of the present invention.
- (A) of FIG. 13 is a plan view and a cross-sectional view of a device in which a detection target fixing region 2 is formed on a part of an electrode 3 disposed on a substrate 1.
- FIG. 13 (b) is a plan view of a device in which a detection target fixing region 2 is formed on a support structure 207 in the center of a donut-shaped electrode 3 arranged on a substrate 1, and FIG. It is sectional drawing.
- FIG. 13 (c) is a plan view of the device in which the detection target fixing region 2 is formed in the region above the substrate 1 in the center above the donut-shaped electrode 3 arranged on the substrate 1. It is a figure and a sectional view.
- any material known to those skilled in the art and used in conventional sensor devices can be used as a material for each member of the device according to the embodiment of the present invention.
- devices and members such as CCD, glass fiber, ultraviolet light source, and pyroelectric sensor used in the embodiment of the present invention, members known in the art can be used.
- FIG. 14 is a conceptual diagram of Embodiment 8 of the present invention.
- the detection means 209 approaches the support 1 only when a reaction product is detected, as indicated by an arrow in the figure. Any configuration known in the art can be adopted as a configuration for allowing the detection means 209 to approach the substrate 1.
- FIG. 15 is a conceptual diagram of Embodiment 9 of the present invention.
- This embodiment includes means 2 15 (not shown) for facilitating immobilization of the detection target 1 15 on the support 1.
- means 2 15 for facilitating immobilization of the detection target 1 15 on the support 1.
- stirring or vibration with a stirring rod (FIG. 15 (a) or (b)) or a means for vibrating the support (FIG. 15 (c)) can be adopted.
- Any means known in the relevant field can be adopted as means 2 15 for promoting the immobilization of the detection target 1 15 on the support 1.
- FIG. 16 is a conceptual diagram of a modification of the ninth embodiment of the present invention.
- a means 2 15 for promoting the immobilization of the detection target 1 15 on the support 1
- a means for taking the solution in and out of the cell, and replacing the solution in the cell Means means for continuously supplying the liquid into the cell, and means for flowing the liquid into the cell may be employed. This Such means are well-known in the art.
- Electrode 3 a series of electrodes having the shape shown in Fig. 21 BCD (a), which differed only in electrode width (W), was prepared (prepared by depositing gold on a substrate). Each of the fabricated electrodes was set on a sensor device (with the secondary antibody for ELISA immobilized) as schematically shown in Fig. 17, and the current response time of the electrode was measured under the following measurement conditions. .
- Immobilized antibody Secondary antibody for ELISA (labeled with horseradish peroxidase (HRP)).
- Immobilization area A secondary antibody solution for ELISA of 100 mg in diameter and 0.5 mg nom 1 was fixed by dropping.
- Reaction solution composition Hue port Sen methanol (FMA), 0. 5mM: H 2 0 2, 5mM; KC 1, 0. 1M; 2 sodium hydrogen phosphate, 0. 1M.
- FMA Hue port Sen methanol
- FIG. 17 shows the performance of the electrode is evaluated by detecting the current generated by the oxidation-reduction reaction of FMA coupled to the enzyme reaction.
- Figure 18 shows the test results.
- the horizontal axis in FIG. 18 is the electrode width (/ zm), which is the donut width W of the donut-shaped electrode shown in (a) of FIG. 21B.
- the vertical axis in FIG. 18 indicates the stabilization time of the electrode.
- the electrode stabilization time was set to the time at which 90% of the maximum current value was obtained.
- the stabilization time is about 300 seconds.As the electrode width increases, more time is required for stabilization, and a radius of 1000 m (1 mm) It took about 10,000 seconds (about 2.8 hours) for the electrode.
- the measurement time is usually less than about 1 000 seconds, so the electrode width must not exceed about 500 im. It has been shown.
- the measurement was performed under the same conditions as above except that the measurement time was fixed at about 100 seconds, and the electrode sensitivity was measured.
- Figure 19 shows the test results.
- the horizontal axis in FIG. 19 is the electrode diameter (diameter (m)), and the vertical axis in FIG. 19 is the electrode sensitivity. Electrode sensitivity was expressed as a difference between the output current value when the secondary antibody for ELISA was fixed and the output current value before fixing the antibody.
- FIG. 20 shows the measurement time
- the vertical axis of FIG. 20 shows the output current of the electrode. From the results shown in Fig. 20, the output current increases as the electrode width increases, but it takes time to respond.If the electrode width is small, the response is fast, but the output current obtained is small, and the specified measurement time It can be seen that the electrode width is uniquely determined by the electrode width.
- FIG. 21A shows an example of a sensor chip embodying the present invention.
- Dotted lines B1 and B2 surrounding the substantially circular region shown in the center of FIG. 21A are regions where the antibody is immobilized, respectively.
- Two thick lines 302 in the figure are electrode wirings, respectively, and the tip portions constitute a measurement electrode and a blank measurement electrode, respectively. Usually, these are formed by depositing gold or the like on the substrate 1.
- the numbers in the figure represent the dimensions of each part in mm.
- FIG. 21B is a diagram showing details of a structure that can be used as the measurement electrode portion and the blank measurement electrode portion shown in FIG. 21A.
- (A) in Fig. 21B shows the structure near the electrode of the sensor chip formed on the substrate where the reaction area is surrounded by the electrodes, and (b) in Fig. 21B shows the reaction area on the electrode surface.
- the structure near the electrodes of the sensor chip formed in Fig. 3 is shown in an enlarged manner.
- the white circular area at the center is an area with a radius of about 50 im on the substrate on which the antibody is immobilized.
- a donut-shaped electrode covered with gold is placed so as to surround this area (the shaded part in the figure).
- FIG. 22 shows another structure of a sensor chip embodying the present invention.
- This sensor chip was configured such that a plurality of electrodes were arranged on a substrate and an antibody-immobilized region was provided on each electrode.
- Nine circles in the center of the figure are electrodes. As shown, the nine electrodes 3 are centered on one electrode and the remaining electrodes are equally spaced on a circumference of 1.5 mm radius. The numbers in the table indicate the dimensions of each part in mm units.
- FIG. 23 is a view showing a resist pattern used for manufacturing the sensor chip.
- FIG. 24 is a cross-sectional view showing a state in which this resist pattern is disposed on the sensor chip, and shows a cross section of the electrode 3.
- FIG. 25 is a plan view showing a state where the resist pattern is arranged on the sensor chip.
- the area where the detection target is immobilized is limited to a very small size, and the detection area of the detection means and the reaction area formed by the reaction product are relatively positioned so that the reaction product can be detected quickly and specifically. Positioned so that the composition is relatively simple and fast, and quickly and sensitively detects very small amounts of analytes in the sample, for example, immunogenic substances such as proteins, microorganisms and viruses, or chemical substances
- a sensor device is provided for the operation.
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002412302A CA2412302A1 (en) | 2000-05-11 | 2001-05-10 | Chemical sensor device |
AU2001256695A AU2001256695A1 (en) | 2000-05-11 | 2001-05-10 | Chemical sensor device |
EP01930043A EP1335200A4 (en) | 2000-05-11 | 2001-05-10 | CHEMICAL SENSOR DEVICE |
JP2001583168A JP3759039B2 (ja) | 2000-05-11 | 2001-05-10 | 化学センサデバイス |
US10/275,783 US7662612B2 (en) | 2000-05-11 | 2001-05-10 | Chemical sensor device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000138671 | 2000-05-11 | ||
JP2000223406 | 2000-07-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001086275A2 true WO2001086275A2 (fr) | 2001-11-15 |
Family
ID=26591681
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2001/003917 WO2001086275A2 (fr) | 2000-05-11 | 2001-05-10 | Dispositif de capteur chimique |
Country Status (6)
Country | Link |
---|---|
US (1) | US7662612B2 (ja) |
EP (1) | EP1335200A4 (ja) |
JP (1) | JP3759039B2 (ja) |
AU (1) | AU2001256695A1 (ja) |
CA (1) | CA2412302A1 (ja) |
WO (1) | WO2001086275A2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005538728A (ja) * | 2002-09-20 | 2005-12-22 | クィーンズ ユニバーシティー アット キングストン | 酵素基質および酵素生成物の分配差による生体分子の検出 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011156915A2 (en) | 2010-06-18 | 2011-12-22 | Pathogen Detection Systems, Inc. | Method and system for detecting biological molecules in samples |
Family Cites Families (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU562373B2 (en) | 1982-11-15 | 1987-06-11 | Data General Corporation | Digital data processing system |
US6846654B1 (en) * | 1983-11-29 | 2005-01-25 | Igen International, Inc. | Catalytic antibodies as chemical sensors |
DK531185A (da) | 1985-11-18 | 1987-05-19 | Radiometer As | Sensor til bestemmelse af koncentrationen af en biokemisk species |
DE3875149T2 (de) * | 1987-03-27 | 1993-02-11 | Isao Karube | Miniaturisierter biofuehler mit miniaturisierter sauerstoffelektrode sowie sein herstellungsverfahren. |
US5063081A (en) * | 1988-11-14 | 1991-11-05 | I-Stat Corporation | Method of manufacturing a plurality of uniform microfabricated sensing devices having an immobilized ligand receptor |
US5200051A (en) * | 1988-11-14 | 1993-04-06 | I-Stat Corporation | Wholly microfabricated biosensors and process for the manufacture and use thereof |
US5491097A (en) * | 1989-06-15 | 1996-02-13 | Biocircuits Corporation | Analyte detection with multilayered bioelectronic conductivity sensors |
US5183740A (en) * | 1990-02-23 | 1993-02-02 | The United States Of America As Represented By The Secretary Of The Navy | Flow immunosensor method and apparatus |
GB9325718D0 (en) * | 1993-12-16 | 1994-02-16 | Ars Holding 89 Nv | Sensor device for sandwich assay |
DE4408352C2 (de) * | 1994-03-12 | 1996-02-08 | Meinhard Prof Dr Knoll | Miniaturisierter stofferkennender Durchflußsensor sowie Verfahren zu seiner Herstellung |
AU2365895A (en) * | 1994-04-26 | 1995-11-16 | Regents Of The University Of Michigan, The | Unitary sandwich enzyme immunoassay cassette, device and method of use |
US5805048A (en) * | 1995-09-01 | 1998-09-08 | Sumitomo Wiring Systems, Ltd. | Plate fuse and method of producing the same |
US6387707B1 (en) * | 1996-04-25 | 2002-05-14 | Bioarray Solutions | Array Cytometry |
CA2276462C (en) * | 1996-12-31 | 2007-06-12 | Genometrix Incorporated | Multiplexed molecular analysis system apparatus and method |
US5759364A (en) * | 1997-05-02 | 1998-06-02 | Bayer Corporation | Electrochemical biosensor |
DE19822123C2 (de) * | 1997-11-21 | 2003-02-06 | Meinhard Knoll | Verfahren und Vorrichtung zum Nachweis von Analyten |
US6388788B1 (en) * | 1998-03-16 | 2002-05-14 | Praelux, Inc. | Method and apparatus for screening chemical compounds |
US6780591B2 (en) * | 1998-05-01 | 2004-08-24 | Arizona Board Of Regents | Method of determining the nucleotide sequence of oligonucleotides and DNA molecules |
US6322963B1 (en) * | 1998-06-15 | 2001-11-27 | Biosensor Systems Design., Inc. | Sensor for analyte detection |
US6020207A (en) * | 1998-06-17 | 2000-02-01 | World Precision Instruments, Inc. | Optical analysis technique and sensors for use therein |
US6344333B2 (en) * | 1998-09-08 | 2002-02-05 | Synectig Corporation | Reagent-free immunoassay monitoring electrode assembly |
US6320295B1 (en) * | 1998-11-18 | 2001-11-20 | Mcgill Robert Andrew | Diamond or diamond like carbon coated chemical sensors and a method of making same |
US6416642B1 (en) * | 1999-01-21 | 2002-07-09 | Caliper Technologies Corp. | Method and apparatus for continuous liquid flow in microscale channels using pressure injection, wicking, and electrokinetic injection |
US6254830B1 (en) * | 1999-11-05 | 2001-07-03 | The Board Of Governors For Higher Education, State Of Rhode Island And Providence Plantations | Magnetic focusing immunosensor for the detection of pathogens |
AU1591301A (en) * | 1999-11-09 | 2001-06-06 | Sri International | Workstation, apparatus, and methods for the high-throughput synthesis, screeningand characterization of combinatorial libraries |
KR100348351B1 (ko) * | 2000-05-24 | 2002-08-09 | 주식회사 바이오디지트 | 전기화학 멤브레인 스트립 바이오센서 |
-
2001
- 2001-05-10 WO PCT/JP2001/003917 patent/WO2001086275A2/ja active Application Filing
- 2001-05-10 EP EP01930043A patent/EP1335200A4/en not_active Ceased
- 2001-05-10 AU AU2001256695A patent/AU2001256695A1/en not_active Abandoned
- 2001-05-10 US US10/275,783 patent/US7662612B2/en not_active Expired - Fee Related
- 2001-05-10 CA CA002412302A patent/CA2412302A1/en not_active Abandoned
- 2001-05-10 JP JP2001583168A patent/JP3759039B2/ja not_active Expired - Fee Related
Non-Patent Citations (2)
Title |
---|
None |
See also references of EP1335200A4 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005538728A (ja) * | 2002-09-20 | 2005-12-22 | クィーンズ ユニバーシティー アット キングストン | 酵素基質および酵素生成物の分配差による生体分子の検出 |
Also Published As
Publication number | Publication date |
---|---|
EP1335200A4 (en) | 2004-03-24 |
EP1335200A1 (en) | 2003-08-13 |
US7662612B2 (en) | 2010-02-16 |
CA2412302A1 (en) | 2002-10-30 |
US20030180184A1 (en) | 2003-09-25 |
AU2001256695A1 (en) | 2001-11-20 |
JP3759039B2 (ja) | 2006-03-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Fu et al. | Flow-injection chemiluminescent immunoassay for α-fetoprotein based on epoxysilane modified glass microbeads | |
Skládal | Advances in electrochemical immunosensors | |
US5427912A (en) | Electrochemical enzymatic complementation immunoassay | |
US4956275A (en) | Migratory detection immunoassay | |
EP0300651B1 (en) | Photoresponsive electrode for determination of redox potential | |
KR0144002B1 (ko) | 촉매성 항체를 이용한 물리적 또는 화학적 검출 시스템 및 검출방법 | |
US7226733B2 (en) | Microcavity biosensor and uses thereof | |
JP4057521B2 (ja) | バイオセンサー | |
Shiku et al. | Dual immunoassay of human chorionic gonadotropin and human placental lactogen at a miocrofabricated substrate by scanning electrochemical microscopy | |
US5149629A (en) | Coulometric assay system | |
Thomas et al. | Microbead-based electrochemical immunoassay with interdigitated array electrodes | |
WO2000072019A2 (en) | Liposome-enhanced test device and method | |
Meyerhoff et al. | Novel nonseparation sandwich-type electrochemical enzyme immunoassay system for detecting marker proteins in undiluted blood | |
Viet et al. | Gold-linked electrochemical immunoassay on single-walled carbon nanotube for highly sensitive detection of human chorionic gonadotropinhormone | |
WO2004097419A1 (en) | Membrane strip biosensor system for point-of-care testing | |
JP2002503343A (ja) | 導電性液体中に存在する生物的物質を同定及び/又は分析する方法と該方法を実行するのに使用される装置及びアフィニティセンサー | |
MXPA94006538A (en) | Immunoassayo de complementacion enzimaticaelectroquim | |
JPH05264552A (ja) | 特異結合分析方法および装置 | |
Ramírez et al. | The evolution and developments of immunosensors for health and environmental monitoring: Problems and perspectives | |
KR100913148B1 (ko) | 자성입자를 포함하는 자기력 기반 바이오 센서 | |
US7931788B1 (en) | Method and apparatus for the detection of pathogens, parasites, and toxins | |
WO2004090512A1 (en) | Optical chemical sensing device with pyroelectric or piezoelectric transducer | |
KR100800436B1 (ko) | 바이오 센서 | |
Liang et al. | Flow-injection immuno-bioassay for interleukin-6 in humans based on gold nanoparticles modified screen-printed graphite electrodes | |
WO2001086275A2 (fr) | Dispositif de capteur chimique |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
ENP | Entry into the national phase |
Ref document number: 2001 583168 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2412302 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2001930043 Country of ref document: EP Ref document number: 10275783 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 2001930043 Country of ref document: EP |