WO2006080438A1 - イムノクロマト用試験具およびこれを用いた半定量方法 - Google Patents
イムノクロマト用試験具およびこれを用いた半定量方法 Download PDFInfo
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- WO2006080438A1 WO2006080438A1 PCT/JP2006/301315 JP2006301315W WO2006080438A1 WO 2006080438 A1 WO2006080438 A1 WO 2006080438A1 JP 2006301315 W JP2006301315 W JP 2006301315W WO 2006080438 A1 WO2006080438 A1 WO 2006080438A1
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- specimen
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- target substance
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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
- G01N33/54366—Apparatus specially adapted for solid-phase testing
- G01N33/54386—Analytical elements
- G01N33/54387—Immunochromatographic test strips
- G01N33/54388—Immunochromatographic test strips based on lateral flow
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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
- G01N33/558—Immunoassay; Biospecific binding assay; Materials therefor using diffusion or migration of antigen or antibody
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
-
- 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
Definitions
- the present invention relates to a test device for semi-quantifying a substance to be measured in a specimen using immunological chromatography (Immunochromatography), and a semi-quantitative method using the test device.
- immunological chromatography Immunochromatography
- An immunochromatographic test device uses blood or blood containing serum or plasma, body fluid such as urine as a sample, detects anti-HBs antigen in the serum sample, detects anti-treponemaparidum antibody in the serum or plasma sample, blood Used for type determination and detection of human chorionic gonadotropin (hCG) in urine samples.
- body fluid such as urine as a sample
- detects anti-HBs antigen in the serum sample detects anti-treponemaparidum antibody in the serum or plasma sample
- blood Used for type determination and detection of human chorionic gonadotropin (hCG) in urine samples.
- hCG human chorionic gonadotropin
- FIG. 5 is a conceptual diagram showing an example of a conventional immunochromatographic test device
- FIG. 5 (a) is a plan view of the immunochromatographic test device
- FIG. 5 (b) is a side view thereof
- FIG. Fig. 5 (c) shows an immunochromatographic test device after use of force, which is the same diagram as Fig. 5 (a).
- a sample pad 13 is provided on a sheet-like substrate 12.
- FIG. When the test device 11 is used, the sample pad 13 is immersed in a specimen to be measured. The specimen absorbed in the sample pad 13 moves to the reagent pad 14 provided adjacent to the sample pad 13 by capillary action.
- the reagent pad 14 carries a labeled antibody or antigen.
- the labeled antibody or antigen carried on the reagent pad 14 is eluted.
- a substance to be measured in a sample and a labeled antibody or antigen may form a complex.
- the specimen containing these moves to the porous body 15 provided adjacent to the reagent pad 14 by capillary action.
- the composite that has reached the porous body 15 moves in the downstream direction (when the sample pad 13 side is the upstream side in the figure) by capillary action.
- a reaction region 16 to which an antibody or an antigen is immobilized is provided on the porous body 15.
- an absorption pad 17 is provided for absorbing other components in the specimen and a substance to be measured that has not been captured.
- the substance to be measured in the sample can be semi-quantified.
- a plurality of reaction regions 16 each having different detection sensitivities for the measurement target substance can be provided, and the measurement target substance in the sample can be semi-quantified by the number of regions 16 in which coloration 1 occurs.
- Patent Documents 1 to 6 describe such an immunochromatographic test device and a method for detecting a measurement target substance in a specimen using the same, or a method for semi-quantifying the measurement target substance.
- Patent Document 1 describes a method for measuring an antigen or antibody in a liquid using a sheet-like test device based on the immunochromatography method.
- a test device having a region exhibiting a standard color on a porous body.
- Patent Document 2 describes a test device for measuring the presence or absence of an antigen or antibody in a liquid using a dye-labeled antigen or antibody.
- a test device for measuring the presence or absence of an antigen or antibody in a liquid using a dye-labeled antigen or antibody.
- Patent Document 3 describes a test device for quantifying an antigen or antibody in a sample solution.
- the test device is characterized by having a plurality of reaction regions in which an amount of capture reagent that increases in upstream force toward the downstream is immobilized, and quantifies the analysis target based on the number of colored reaction regions. It is. Although it is an essential requirement to have a plurality of reaction regions, it is not preferable to provide a plurality of reaction regions because the manufacturing process becomes complicated. Further, there is no disclosure or suggestion regarding the test device having a region exhibiting a standard color on the porous body.
- Patent Document 4 describes a test device for semi-quantifying an antigen or antibody in a sample solution.
- the test device is a particle-labeled antigen or antibody, the direction of development of the sample solution.
- the amount of the antigen or antibody can be estimated semi-quantitatively by the principle of the sandwich method, having a plurality of reaction regions arranged in series.
- a plurality of reaction regions is an essential requirement, but providing a plurality of reaction regions is not preferable because the manufacturing process becomes complicated. Further, there is no disclosure or suggestion regarding a test device having a region exhibiting a standard color on a porous body.
- Patent Document 5 discloses an immunochromatographic analysis using an immunochromatographic analysis piece having a portion where a constant color tone appears on the same film and a portion where a concentration-dependent color tone of a specimen appears. After injecting a sample with an unknown concentration into a strip and performing chromatographic development, the color tone of the portion where a certain color tone appears and the color tone of the portion where the concentration-dependent color tone of the sample appears are visually measured using an optical density measuring device A method for measuring the concentration of a read unknown analyte is described. This method is characterized in that the control color region and the concentration-dependent color region of the sample are on the same film, but the control color region is immobilized differently from the sample. The coloration is performed using an antibody and a labeled antibody, which is complicated and is not easy to adjust to a color corresponding to the concentration of a specific specimen.
- Patent Document 6 describes an immunochromatographic test device in which a classification line type indication is directly printed on a porous body to which a specimen moves due to capillary action. As described in Patent Document 6, when printing is performed on a porous body on which a specimen moves due to capillary action, the idea is that a measurement target substance is not formed on the porous body before Patent Document 6. The idea of providing a display useful for measuring concentration has been quite powerful.
- Patent Document 1 Japanese Patent Application Laid-Open No. 7-55808
- Patent Document 2 Japanese Patent Laid-Open No. 10-73592
- Patent Document 3 Japanese Patent Laid-Open No. 5-5743
- Patent Document 4 JP-A-8-278305
- Patent Document 5 Japanese Patent Laid-Open No. 2001-83153
- Patent Document 6 Japanese Patent Laid-Open No. 2001-13143
- the present invention uses the immunochromatography method and is easy to manufacture and is contained in the specimen. It is an object of the present invention to provide a novel test device for easily semi-quantifying the concentration of a measurement target substance and a semi-quantitative method using this test device.
- the present invention is an immunochromatographic test device having a porous body in which a specimen can move by capillary action
- the immunochromatographic test tool is:
- the standard coloration corresponding to the coloration at a specific concentration of the measurement target substance has a region arranged in a fixed state on the porous body
- test device of the present invention A test device for semi-quantifying the measurement target substance in the specimen by comparing the coloration generated in the region (2) with the standard coloration (hereinafter referred to as “test device of the present invention”). . )I will provide a.
- the standard coloring used for the region where the labeling dye used in the above and the standard coloring corresponding to the coloring at a specific concentration of the measurement target substance in (3) are fixed on the porous body are used.
- Examples of the test device include the same colorant as the colorant.
- the present invention also provides a method for semi-quantifying a substance to be measured in a specimen using the test device of the present invention.
- the test device of the present invention is generated by capturing the standard color fixed on the porous body of the immunochromatographic test device and the antibody or antigen immobilized on the porous body of the measurement target substance. By comparing with the coloration, it is possible to easily semi-quantify the measurement target substance contained in the sample.
- the test device of the present invention includes a region (reaction region) in which an antibody or an antigen that can specifically bind to a measurement target substance is fixed on a porous body, and a specific substance of the measurement target substance. Since the standard coloration corresponding to the coloration at the concentration has a region arranged in a fixed state on the porous body, the coloration of the reaction region and the standard coloration should be compared under the same conditions. It is possible to obtain high accuracy.
- the test device of the present invention can perform semi-quantification if there is at least one reaction region and a region exhibiting standard coloration, a plurality of reaction regions are essential for semi-quantification. Compared to a test device, it can be easily manufactured. In addition, for areas showing standard coloration, it is an essential requirement to fix dyes etc. directly on the porous body without using antibodies, antigens, etc. Compared to test equipment, it can be easily manufactured. In addition, since the reaction such as an antigen-antibody reaction is not indirectly performed, the color tone of the standard coloring is not affected at all by the difference in various use conditions when using this test device.
- FIG. 1 is a conceptual diagram of an embodiment of a test device of the present invention.
- FIG. 2 is a side view of the test device of FIG.
- Fig. 3 is a graph showing the time course of standard coloration 8 and the degree of coloration! / ⁇ after the test device of the present invention is immersed in hCG adjusted to various concentrations. .
- FIGS. 4 (a) to 4 (e) are plan views of the test device used in the examples, and FIG. 4 (a) is an unused test device before immersion in the urine specimen.
- Fig. 4 (b) shows a test device after semi-quantification using a sample with hCG concentration of 25 IUZL
- Fig. 4 (c) shows a test device after semi-quantification using a sample with hCG concentration of 1000 IUZL
- Fig. 4 ( d) shows a test device after semi-quantification using a sample with hCG concentration of 10000 IUZL
- Fig. 4 (e) shows a test device after semi-quantification using a sample with hCG concentration OIUZL (negative).
- RU [FIG. 4]
- FIG. 5 (a) is a conceptual diagram showing a conventional immunochromatographic test device, and the test device is shown in a plan view.
- FIG. 5 (b) is a side view of the test device shown in FIG. 5 (a).
- FIG. 5 (c) shows the same test force as in FIG. 5 (a) and the test device after use.
- FIG. 1 is a conceptual diagram of an embodiment of the test device of the present invention
- FIG. 2 is a side view of the test device shown in FIG.
- a sample pad 3, a reagent pad 4, a porous body 5 and an absorption pad 7 are formed on a sheet-like substrate 2.
- the reagent pad 4, the porous body 5 and the absorption pad 7 are covered with a protective film 20.
- each component is formed on a sheet-like substrate 2.
- the substrate 2 is made of a material that does not absorb or permeate the specimen passing through each component during the immunochromatography and does not denature the specimen when the specimen comes into contact.
- plastic materials used in medical devices such as vinyl chloride, polyethylene, ethylene acetate butyl resin, polypropylene, polycarbonate, polyurethane, polystyrene, silicone resin, and fluorine resin. , Polyethylene terephthalate, polyamide, ABS resin and the like.
- the substrate 2 may be made of paper having a water and oil repellent finish on the surface.
- the sample pad 3 is a part where the specimen is dropped or immersed in the specimen. When an insoluble substance is present in the specimen, the sample pad 3 also acts as a filter for removing the insoluble substance. To do. From this point of view, the sample pad 3 is not particularly limited to a force exemplified by a nonwoven fabric or a porous membrane having a pore diameter of 20 ⁇ m to 100 ⁇ m, preferably 30 ⁇ m to 40 ⁇ m.
- the material that can be used for the sample pad 3 is not particularly limited as long as a certain amount of specimen can be collected, is hydrophilic, and has a filter function.
- regenerated cellulose, cellulose acetate, nitrocellulose, and poly Forces exemplified by acrylonitrile, ethylene butyl acetate, polyurethane, polymethyl methacrylate, nylon resin, glass fiber, pulp, cotton, rayon, acrylic, polyester and the like are not particularly limited thereto.
- the specimen dropped onto the sample pad 3 moves in the downstream direction, that is, toward the reagent node 4 by capillary action.
- the sample pad 3 side of the test device 1 is the upstream side, and the opposite side is the downstream side.
- the sample pad 3 is included in the sample pad 3 as a result of being immersed in the sample. It also means a specimen that has been removed.
- the material of the reagent pad 4 is exemplified by a nonwoven fabric or a porous membrane as in the case of the sample pad 3, but is not particularly limited thereto.
- the reagent pad 4 carries an antibody or an antigen that can specifically bind to the measurement target substance in the sample in a state labeled with a labeling substance such as a dye.
- the antibody or antigen that can specifically bind to the measurement target substance is appropriately selected according to the measurement target substance.
- the substance to be measured is human chorionic gonadotropin (hCG) in a urine sample
- an anti-hCG antibody more specifically, an anti-hCG mouse polyclonal antibody, an anti-hCG mouse monoclonal antibody, or the like
- AFP alphafetoprotein
- an anti-AFP antibody is used.
- an anti-HIV antibody an HIV antigen peptide or the like is used.
- PSA prostate specific antigen
- PSA prostate specific antigen
- the labeling substance is not particularly limited as long as visible color development is observed.
- metal colloids represented by gold colloids, non-metal colloids, dye sols such as dye sols or disperse dyes, latex particles or Examples thereof include colored fine particles.
- latex fine particles or polystyrene fine particles colored with dyes or pigments are preferred from the viewpoints of excellent color developability, abundant color tone and particle diameter, and the presence of a plurality of methods for labeling antibodies or antigens.
- This labeling method is well known by those skilled in the art, and there are a method by adsorption and a method by chemical binding.
- latex particles or polystyrene particles having a particle size of 0.5 ⁇ m or less, preferably 0.05 to 0.5 ⁇ m, which are colored with a dye or a pigment, are preferably spherical or substantially spherical. . Most preferred is a blue latex.
- the labeled antibody or antigen is carried on the reagent pad 4 in a movable state.
- “supported in a movable state” means that the labeled antibody or antigen is retained in the reagent pad 4 when not in use, that is, when the reagent pad 4 is dry. This means that when the reagent pad 4 is wetted during use, that is, due to the arrival of the specimen, the labeled antibody or antigen becomes movable.
- reagent pad 4 is labeled
- the adsorbed antibody or antigen must be a material, but if it is a material that adsorbs, it can be used by masking with an inactive protein such as BSA in advance.
- the labeled antibody or antigen is retained on the reagent pad 4 by, for example, impregnating the reagent pad 4 and then lyophilizing it.
- the reagent pad 4 forms a region where the labeled antibody or antigen that can specifically bind to the substance to be measured in the specimen can be moved.
- the specimen dropped on the sample pad 3 moves to the reagent pad 4 by capillary action.
- the hole diameter of the reagent pad 4 is preferably the same as or smaller than that of the sample pad 3.
- the pore size of the reagent pad 4 is exemplified by 1 ⁇ m to 50 ⁇ m, preferably 5 ⁇ m to 30 ⁇ m.
- the sample pad 3 and the reagent pad 4 are partially stacked in order to facilitate the movement of the specimen due to capillary action.
- the sample pad 3 and the reagent pad 4 may be simply arranged adjacent to each other or may be the same pad as long as the specimen can be appropriately moved by the capillary phenomenon.
- the substance to be measured in the specimen and the labeled antibody or antigen in the pad 4 move downstream, that is, toward the porous body 5 by capillary action.
- the measurement target substance and the labeled antigen or antibody are in an antigen-antibody relationship, a part or all of both forms an antigen-antibody complex, which is also downstream, that is, porous. Move to body 5.
- the reagent pad 4 and the porous body 5 are partially laminated.
- the reagent pad 4 and the porous body 5 may be simply disposed adjacent to each other, or the reagent pad 4 may serve as the porous body 5. The reverse is also possible.
- the porous body 5 has a structure having sponge-like pores or a network, and is a medium in which the specimen can move by capillary action.
- the test device 1 shown in FIGS. 1 and 2 is shown as a sheet-like porous membrane.
- the material of the porous body 5 is not particularly limited as long as the immunochromatography method can be performed. Woven fabrics and nonwoven fabrics made from porous synthetic polymers such as cellulose, cellulose derivatives, nitrocellulose, ethylene acetate butyl, polyurethane, polymethyl methacrylate, nylon resin, polyvinylidene difluoride (PVDF), etc.
- Examples thereof include membranes, glass fiber filters, various filter papers, and the like, and those using nitrocellulose, which are preferable using cellulose, cellulose derivatives, and porous synthetic polymers, are particularly preferable.
- Examples of the pore diameter of the porous body 5 include 1 ⁇ m to 30 ⁇ m, preferably 1 ⁇ m to 20 ⁇ m.
- the porous body 5 has a region 6 (reaction region) in which an antibody or an antigen capable of specifically binding to the measurement target substance is immobilized.
- the antibody or antigen immobilized on region 6 can be appropriately selected according to the substance to be measured. Specifically, when the substance to be measured is hCG, an anti-hCG antibody, more specifically, an anti-hCG mouse polyclonal antibody, an anti-hCG mouse monoclonal antibody, or the like can be used. When the substance to be measured is AFP, an anti-AFP antibody can be used. When the substance to be measured is an anti-HIV antibody, an HIV antigen peptide or the like can be used.
- an anti-PSA mouse monoclonal antibody, an anti-PSA rabbit antibody, or the like can be used.
- These immobilization methods can be easily fixed by directly applying and drying the above-mentioned antibody or antigen solution when the porous body 5 is, for example, -trocellulose or nylon.
- the porous material In the case of porous materials such as glass fiber filters and filter paper that cannot be fixed by direct application and drying, the porous material must be activated or pre-treated with the activity of the immobilized antibody or antigen.
- the antigen, antibody, and Z or complex that have migrated through the porous body 5 by capillarity are captured by the antibody or antigen immobilized on the region 6.
- the antigen, antibody, and Z or complex containing the labeling substance are captured, it can be confirmed as a color developed in region 6.
- the color tone generated in region 6 depends on the immunochromatography method (reagent combination) used and the concentration of the substance to be measured in the sample. For example, when the complex formed by the labeled antibody held on the reagent pad 4 and the antigen in the sample is captured by the immobilized antibody in the reaction region, the concentration of the measurement target substance in the sample is high.
- the porous body 5 has a region in which a standard color 8 corresponding to a color at a specific concentration of the measurement target substance is fixed. That is, in the test device 1, a region having a color tone equal to the coloration generated in the region 6 is formed on the porous body 5 when a specimen containing a specific concentration of the measurement target substance (hereinafter referred to as “reference concentration”) is used. Has been. Note that the fixing method similar to that in the reaction region can also be used for the method of fixing the standard color 8.
- the color tone generated in the region 6 present on the porous body 5 of the test device 1 is compared with the color tone of the standard color 8, thereby measuring in the specimen.
- the target substance can be easily semi-quantified. That is, for example, when the complex formed by the antigen in the specimen and the labeled antibody held in the reagent pad 4 is captured by the immobilized antibody in the reaction region, the color tone generated in the region 6 is changed. If it is weaker than the standard color tone 8, the concentration of the analyte in the sample will be lower than the reference concentration. If the color tone generated in region 6 is stronger than the standard color tone 8, the concentration of the substance to be measured in the sample is higher than the reference concentration.
- the concentration of the substance to be measured in the sample is comparable to the reference concentration.
- the test device 1 of the present invention can also perform a qualitative evaluation at a specific sensitivity of the measurement target substance based on the presence or absence of coloration in the region 6.
- the concentration of the measurement target substance in the sample can be accurately measured. wear.
- the standard color 8 Since the specimen moves inside the porous body 5 due to capillary action, the standard color 8 has many It is preferably fixed to the surface of the hole 5.
- the standard color 8 is preferably a labeling substance used to label the antibody or antigen carried on the reagent pad 4.
- preferred examples include metal colloids represented by gold colloids, non-metallic colloids, dye particles such as dye sols or disperse dyes, latex particles, and colored fine particles.
- latex fine particles or polystyrene fine particles colored with dyes or pigments are preferred from the viewpoints of excellent color developability, abundant color tone and particle diameter, and the existence of a plurality of methods for labeling antibodies or antigens.
- This labeling method is known by those skilled in the art, and there are a method by adsorption and a method by chemical binding.
- latex or polystyrene particles that are colored with dyes or pigments and have a particle size of 0.5 ⁇ m or less, preferably 0.05 to 0.5 ⁇ m, and are spherical or substantially spherical.
- a particle size 0.5 ⁇ m or less, preferably 0.05 to 0.5 ⁇ m, and are spherical or substantially spherical.
- spherical or substantially spherical spherical or substantially spherical.
- the standard coloration 8 may be formed using other substances such as pigments, dyes, and pigments as long as the color tone is the same as the coloration at a specific concentration of the substance to be measured.
- an antibody or an antigen that can specifically bind to the measurement target substance is disposed on the porous body in a fixed state (reaction area 6), and is displayed at a specific concentration of the measurement target substance.
- the area where the standard color corresponding to the color is fixed on the porous body (standard color 8) is arranged in series or in parallel with the development direction of the developing solvent. Most preferably, they are arranged in series. Moreover, it is preferable that both are located in the vicinity. Specifically, the distance between the two is preferably within 20 mm, more preferably within 10 mm.
- the developing solvent is not particularly limited as long as it can be normally contained in a specimen.
- examples include water (including water contained in the specimen); physiological saline; organic solvents such as acetone.
- the development direction of the developing solvent is the direction from the sample pad 3 to the absorption pad 7 in FIG.
- the labeling dye used in the region (reagent pad 4) in which the labeled antibody or antigen that can specifically bind to the analyte in the sample can be moved, and the identification of the analyte Standard coloration corresponding to coloration at different concentrations is fixed on the porous body
- the standard coloring dye used in the region (standard coloring 8) arranged in the state of being formed is latex particles, preferably the same color.
- the reference concentration and detection sensitivity indicated as the standard coloration 8 can be appropriately selected according to the type of the substance to be measured and the use of the test device.
- the detection sensitivity is preferably 25 IUZL and the reference concentration is preferably lOOOOIUZL.
- the reference concentration is lOOOIUZL, evaluations such as ectopic pregnancy, premature labor, and prognosis of choriocarcinoma can be performed.
- the target substance in the sample can be semi-quantified in one measurement.
- the detection sensitivity is lng ZmL and the reference concentration is 4 ngZmL.
- PSA detection sensitivity is IngZmL
- prostate hypertrophy can be diagnosed based on the presence or absence of color development in region 6, and prostate cancer can be diagnosed when the reference concentration is 4 ngZmL.
- semi-quantitative determination of the PSA concentration in the sample is possible based on the PSA concentrations of IngZmL and 4ngZmL in a single operation.
- the test device 1 shown in FIGS. 1 and 2 is provided with an absorbent pad 7 for absorbing them.
- the absorbent pad 7 is not particularly limited as long as it can absorb and hold the specimen that has moved through the porous body 5. Therefore, the absorbent pad 7 can be widely used, such as filter paper, non-woven fabric, and porous membrane, that have been conventionally used for the purpose of absorbing liquid and retaining it inside.
- the absorbent pad 7 may contain a water-absorbing / hygroscopic substance such as silica gel.
- test device 1 of the present invention has a mechanism for confirming the completion of the test.
- test device 1 shown in Fig. 1 and Fig. 2 the standard color of porous body 5
- a region 9 that generates color when the sample arrives is provided.
- a transparent window 22 is provided in a portion of the protective film 20 covering the porous body 5 that covers the region 9.
- portions 21 and 22 of the protective film 20 are transparent, and portions 23, 23 ′ and 23 ⁇ are opaque.
- the region 9 and the window 22 form a mechanism for confirming the completion of the test. That is, when the specimen that has moved through the porous body 5 reaches the region 9, color development occurs, and this color development can be confirmed through the window 22. Thereby, it can be confirmed that the test is completed.
- the area 9 is impregnated or fixed with various color formers.
- color formers that are impregnated or immobilized in the region 9 are those that develop color when contacted with a liquid sample having a predetermined pH, such as eosin B, phloxine B, benzoperpurine 4B, Congo red, Examples include bromphenol levenore, bromcrezo monore green, 2,5-dinitrophenol, or related substances.
- the color former may be one that develops color due to its moisture when the specimen reaches region 9! /.
- a water-soluble dye is impregnated in a region upstream of the window 22 of the porous body 5, for example, in a region covered with the opaque portion 23 'so that the sample dissolves when it reaches the sample.
- the dye that dissolves and moves in the specimen may be confirmed through the window 22.
- a component that specifically reacts with a labeled antigen or antibody for example, a labeled anti-hCG mouse monoclonal antibody is used, an anti-mouse mouse antibody or the like is immobilized in region 9 to achieve the object. obtain.
- labeled antibody, labeled piotin, keyhole mossian, etc. are retained in the reagent pad 4 without being involved in the measurement, and the antibody that reacts specifically with the labeled antibody or antigen, avidin, or anti-keyhole. This purpose can be achieved even if the antibody is immobilized in region 9.
- test device of the present invention has been described in detail with reference to the drawings, the test device of the present invention is not limited to the illustrated form.
- the test device of the present invention is an immunochromatographic test device having a porous body in which the specimen can move by capillary action, and can be widely used those having the following areas (1) to (3). .
- the test device of the present invention is a test apparatus for immunochromatography described in JP-T-1-503174, JP-A-6-180320, JP-A-6-160388. You may have a casing which accommodates components, such as a porous body. Further, the protective film 20 illustrated in the drawings of the present invention is not essential for the test device of the present invention.
- the reaction region fixed on the porous body and the shape of Z or standard color are not limited to a linear shape as shown in the figure, and may be other shapes.
- a plurality of reaction regions and Z or standard coloring corresponding to coloring at different concentrations of the substance to be measured may be fixed on the porous body.
- the test device of the present invention can be applied to various biological liquid samples.
- a liquid sample include blood, plasma, serum, saliva, urine, fecal extract, tissue extract and the like.
- the measurement target substances contained in these liquid samples include various proteins and peptides that function as antigens or antibodies, complex proteins, lipids, complex lipids, nucleic acids, lectins, sugar chains or compounds having these, piotin, avidin , Hormones, enzymes, enzyme substrates, enzyme inhibitors, receptors, ligands, drugs, drug metabolites, analyte derivatives, etc.
- human chorionic gonadotropin hCG
- luteinization Hormone LH
- Alphafetoprotein AFP
- CEA Carcinoembryonic antigen
- hPL Human placental lactogen
- Beta 2 microglobulin
- Ferritin HBs antigen
- Estrogen PSA, etc.
- An antibody against is exemplified.
- antibodies, antigens, nucleic acids, avidin and piotin are preferably used, and antibodies or antigens are particularly preferred.
- test device of the present invention can also be applied to a solution prepared by dissolving a standard sample of a measurement target substance as exemplified above in physiological saline or the like.
- test device of the present invention will be further described by way of examples.
- test device 1 shown in FIGS. 1 and 2 was used.
- test device 1 Each configuration of test device 1 was as follows.
- Base 2 Polyester, length 125mm x width 8mm x thickness 0.25mm
- Sample pad 3 Non-woven fabric (Benlyse, manufactured by Asahi Kasei Co., Ltd.) 30 mm long x 8 mm wide x 0.3 mm thick was adhered.
- Reagent Pad 4 Latex particles colored with blue dye as labeling substance (particle size 0.3) on non-woven fabric (glass fiber, manufactured by Millipore) 15mm long x 8mm wide x 0.3mm thick m anti-hCG mouse monoclonal antibody) bound with spherical particles) and lyophilized were used. This was adhered on the substrate 2.
- Porous material 5 A nitrocellulose film (length 25 mm ⁇ width 8 mm ⁇ thickness 235 ⁇ m, pore diameter about 8 m) was adhered onto the substrate 2.
- the ends of the porous body 5 and the reagent pad 4 are laminated (2 mm in length).
- Standard color 8 Same as the color used as the labeling substance as standard color 8, so that hCG with a density of 1000 IUZL (reference concentration) has the same color tone as that of the antibody when captured by the antibody in region 6.
- the particles colored with a blue dye) were fixed on the surface of the porous body 5.
- the region 9 downstream of the standard color 8 of the porous body 5 was impregnated with eosin B as a color former and dried.
- Absorbent pad 7 Nonwoven fabric (glass fiber, manufactured by Whatman) having a length of 20 mm, a width of 8 mm, and a thickness of 0.4 mm was bonded onto the substrate 2.
- Protective film Except for the sample pad 3, the upper part of the test device 1 was covered with a protective film (made of polyethylene terephthalate) having transparent portions 21, 22 and opaque portions 23, 2, 23 ".
- the substance to be measured is human chorionic gonadotropin (hCG). Semi-quantitative was performed.
- sample pad 1 of test device 1 Add 3 parts of sample pad 1 of test device 1 to a solution diluted with physiological saline containing 0.1% BS A so that hCG (manufactured by National Institute of Health Sciences) is included at various concentrations as follows. It was immersed for a while. Next, the test device 1 was left in the horizontal direction for about 3 minutes so that the protective film 20 was on top. When a coloration indicating that the reaction was completed in window 22 was clearly generated, the coloration of standard color 8 and region 6 was measured with a densitometer.
- hCG manufactured by National Institute of Health Sciences
- samples having hCG concentrations of OIUZL (negative), 25IUZL, lOOIU / L, 250IU / L, 500IU / L, lOOOIUZL and lOOOOIUZL were used.
- the value of the coloration degree of standard coloration 8 measured with a densitometer was 9800.
- Negative specimen shows almost no color, color develops with 25IUZL, color develops with increasing concentration, color develops almost equivalent to standard color with 1000IUZL, and color develops stronger than standard color at higher concentrations, semi-quantitative It was useful as a test tool.
- test device 1 the presence or absence of a change in coloration with time was confirmed.
- the test device 1 was immersed for about 3 seconds in the specimen whose concentration was adjusted so that the sample pad 3 was immersed.
- the test device 1 was left to stand for about 3 to 30 minutes in the horizontal direction so that the protective film 20 was on top, and the standard coloration 8 and the coloration of the region 6 at each time were measured with a densitometer.
- samples with hCG concentrations of 0 IUZL (negative), 25 IUZL, 500 IU / L, 1000 IU / L and 10 6 IUZL were used.
- Figure 3 and the table below show the degree of color change with time. As shown.
- the coloration degree is an average value measured three times for each density.
- the standard color value is the average of 3 times for each density (15 times in total).
- FIG. 4 is a plan view showing the test device 1 before and after the semi-quantitative measurement.
- Figure 4 (a) is an unused test device before immersion in the sample, (b) is a test device after semi-quantification using a urine sample with an hCG concentration of 25 IUZL, and (c) is a sample with an hCG concentration of 1000 IUZL.
- D is a test device after semi-quantitative analysis using a sample with hCG concentration lOOOOIUZL, (e) is a sample with hCG concentration OIUZL (negative) Each test piece after semi-quantitative analysis is shown.
- the present invention relates to a test device for semi-quantifying a substance to be measured in a specimen using immunological chromatography (Immunochromatography), and a semi-quantitative method using the test device.
- immunological chromatography Immunochromatography
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Priority Applications (3)
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JP2007500594A JP4988546B2 (ja) | 2005-01-28 | 2006-01-27 | イムノクロマト用試験具およびこれを用いた半定量方法 |
KR1020077014608A KR101254512B1 (ko) | 2005-01-28 | 2006-01-27 | 면역 크로마토그래피용 시험구 및 이것을 사용한 반정량방법 |
CN2006800033441A CN101120253B (zh) | 2005-01-28 | 2006-01-27 | 用于免疫色谱的试验器具以及使用该器具的半定量方法 |
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JP2005-021280 | 2005-01-28 | ||
JP2005021280 | 2005-01-28 |
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WO2006080438A1 true WO2006080438A1 (ja) | 2006-08-03 |
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PCT/JP2006/301315 WO2006080438A1 (ja) | 2005-01-28 | 2006-01-27 | イムノクロマト用試験具およびこれを用いた半定量方法 |
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JP (1) | JP4988546B2 (ja) |
KR (1) | KR101254512B1 (ja) |
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WO (1) | WO2006080438A1 (ja) |
Cited By (9)
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JP2008249606A (ja) * | 2007-03-30 | 2008-10-16 | Sysmex Corp | クロマトグラフィー用試験具 |
JP2010038735A (ja) * | 2008-08-05 | 2010-02-18 | Terumo Corp | 腹膜機能の評価方法および腹膜機能評価用イムノクロマト試験紙 |
WO2010126011A1 (ja) * | 2009-04-28 | 2010-11-04 | デンカ生研株式会社 | 簡易メンブレンアッセイ装置 |
JP2013181851A (ja) * | 2012-03-02 | 2013-09-12 | Nikken Seil Co Ltd | 抗酸化能判定具 |
WO2014199954A1 (ja) | 2013-06-10 | 2014-12-18 | 旭化成せんい株式会社 | イムノクロマト診断キット |
JP2017509889A (ja) * | 2014-03-31 | 2017-04-06 | ワットマン・ゲーエムベーハー | ラテラルフロー試験及びそれに関係する改善 |
WO2018181741A1 (ja) * | 2017-03-31 | 2018-10-04 | 東洋紡株式会社 | イムノクロマト試験片およびキットおよび測定方法 |
US10434508B2 (en) | 2014-07-03 | 2019-10-08 | Abionic Sa | Capsule for rapid molecular quantification of a fluid sample such as whole blood |
JP2022009826A (ja) * | 2016-07-29 | 2022-01-14 | 株式会社カネカ | 検査用デバイス |
Families Citing this family (3)
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CN102305854A (zh) * | 2011-07-20 | 2012-01-04 | 汤凌霄 | 一种超灵敏、定量免疫层析装置及检测方法 |
CN104730258B (zh) * | 2015-03-12 | 2017-06-09 | 罗阳 | 一种便携式血型系统检测试纸及其检测方法 |
WO2019216460A1 (ko) * | 2018-05-10 | 2019-11-14 | 주식회사 나노바이오라이프 | 그리드 분할 투명기판을 가진 진단키트 및 이를 이용하는 광학 진단 장치 |
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- 2006-01-27 CN CN2006800033441A patent/CN101120253B/zh not_active Expired - Fee Related
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Cited By (16)
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JP2008249606A (ja) * | 2007-03-30 | 2008-10-16 | Sysmex Corp | クロマトグラフィー用試験具 |
JP2010038735A (ja) * | 2008-08-05 | 2010-02-18 | Terumo Corp | 腹膜機能の評価方法および腹膜機能評価用イムノクロマト試験紙 |
WO2010126011A1 (ja) * | 2009-04-28 | 2010-11-04 | デンカ生研株式会社 | 簡易メンブレンアッセイ装置 |
US8940525B2 (en) | 2009-04-28 | 2015-01-27 | Denko Seiken Co., Ltd. | Device for a membrane assay |
JP5694922B2 (ja) * | 2009-04-28 | 2015-04-01 | デンカ生研株式会社 | 簡易メンブレンアッセイ装置 |
JP2013181851A (ja) * | 2012-03-02 | 2013-09-12 | Nikken Seil Co Ltd | 抗酸化能判定具 |
WO2014199954A1 (ja) | 2013-06-10 | 2014-12-18 | 旭化成せんい株式会社 | イムノクロマト診断キット |
KR20160003240A (ko) | 2013-06-10 | 2016-01-08 | 아사히 가세이 셍이 가부시키가이샤 | 이뮤노크로마토 진단 키트 |
JP2017509889A (ja) * | 2014-03-31 | 2017-04-06 | ワットマン・ゲーエムベーハー | ラテラルフロー試験及びそれに関係する改善 |
US11073519B2 (en) | 2014-03-31 | 2021-07-27 | Global Life Sciences Solutions Germany Gmbh | Lateral flow testing |
US10434508B2 (en) | 2014-07-03 | 2019-10-08 | Abionic Sa | Capsule for rapid molecular quantification of a fluid sample such as whole blood |
JP2022009826A (ja) * | 2016-07-29 | 2022-01-14 | 株式会社カネカ | 検査用デバイス |
JP7284239B2 (ja) | 2016-07-29 | 2023-05-30 | 株式会社カネカ | 検査用デバイス |
WO2018181741A1 (ja) * | 2017-03-31 | 2018-10-04 | 東洋紡株式会社 | イムノクロマト試験片およびキットおよび測定方法 |
JPWO2018181741A1 (ja) * | 2017-03-31 | 2020-03-05 | 東洋紡株式会社 | イムノクロマト試験片およびキットおよび測定方法 |
JP7131546B2 (ja) | 2017-03-31 | 2022-09-06 | 東洋紡株式会社 | イムノクロマト試験片およびキットおよび測定方法 |
Also Published As
Publication number | Publication date |
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CN101120253A (zh) | 2008-02-06 |
JP4988546B2 (ja) | 2012-08-01 |
KR20070101258A (ko) | 2007-10-16 |
KR101254512B1 (ko) | 2013-04-19 |
JPWO2006080438A1 (ja) | 2008-06-19 |
CN101120253B (zh) | 2012-12-05 |
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