WO2020217635A1 - 膜担体及び検査キット - Google Patents
膜担体及び検査キット Download PDFInfo
- Publication number
- WO2020217635A1 WO2020217635A1 PCT/JP2020/004282 JP2020004282W WO2020217635A1 WO 2020217635 A1 WO2020217635 A1 WO 2020217635A1 JP 2020004282 W JP2020004282 W JP 2020004282W WO 2020217635 A1 WO2020217635 A1 WO 2020217635A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- protrusion
- membrane carrier
- region
- height
- profile
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- 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
- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
- B01L3/502707—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by the manufacture of the container or its components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- 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
- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
- B01L3/50273—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by the means or forces applied to move the fluids
-
- 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
-
- 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
-
- 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
- B01L2300/0825—Test strips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/04—Moving fluids with specific forces or mechanical means
- B01L2400/0403—Moving fluids with specific forces or mechanical means specific forces
- B01L2400/0406—Moving fluids with specific forces or mechanical means specific forces capillary forces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/08—Regulating or influencing the flow resistance
- B01L2400/084—Passive control of flow resistance
- B01L2400/086—Passive control of flow resistance using baffles or other fixed flow obstructions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Definitions
- the present invention relates to a membrane carrier and a test kit.
- Point of Care Test point-of-care testing
- the POCT reagent is, for example, a test reagent performed by the subject or by the subject himself / herself, and has features that the result can be discriminated in a short time, the method of use is simple, and the cost is low. Due to these characteristics, it is often used for medical examinations and regular medical examinations when the symptoms are mild, and it is an important medical examination tool in home medical care, which is expected to increase in the future.
- a liquid sample such as blood is introduced into a test kit, and a judgment is made by detecting a specific substance to be detected contained in the test kit.
- Immunochromatography is often used as a method for detecting a specific substance to be detected from a liquid sample.
- the substance to be detected and the labeling substance are bound to each other while the liquid dropped on the membrane carrier of the test kit moves on the membrane carrier, and these are further immobilized in the test kit. It is a method of specifically binding to a substance (hereinafter referred to as a detection substance) and detecting the resulting change in color or mass.
- the detection substance may be paraphrased as a reagent.
- a nitrocellulose membrane is often used as a membrane carrier for moving a liquid sample (Patent Document 1).
- the nitrocellulose membrane has a large number of fine pores having a diameter of about several ⁇ m, and the liquid sample moves through the pores by capillary force.
- the nitrocellulose membrane is derived from a natural product and the pore diameter and the connection between the pores are not uniform, there will be a difference in the flow velocity of the liquid sample in each membrane. If there is a difference in the flow velocity, the time required to detect the substance to be detected also changes, and as a result, the substance to be detected may be erroneously judged as non-detection before forming a bond.
- Patent Document 2 a liquid sample inspection kit in which a fine flow path is artificially prepared has been devised.
- Patent Document 2 since a membrane carrier having a uniform structure can be produced by using a synthetic material, it is possible to reduce the possibility that the substance to be detected is erroneously determined as non-detection before forming a bond. ..
- Patent Documents 3 to 3 When a synthetic material is used, it is necessary to increase the affinity between the detected substance and the material in order to improve the detection sensitivity, and it is considered effective to perform various surface treatments on the material in advance (Patent Documents 3 to 3). 4).
- Patent Document 5 is a membrane carrier for a test kit for detecting a substance to be detected in a liquid sample, and includes at least one flow path capable of transporting the liquid sample, and transports the liquid sample to the bottom surface of the flow path. Discloses a membrane carrier for a liquid sample test kit, which is provided with a microstructure that causes the capillarity of the liquid sample.
- the present invention has been made in view of the above circumstances, and provides a membrane carrier capable of obtaining a test kit with improved detection sensitivity and a test kit with improved detection sensitivity.
- the present inventors have made extensive studies to achieve the above problems. As a result, they have found that the detection sensitivity of the substance to be detected in the liquid sample can be improved by satisfying a specific relationship with the peripheral lengths of the protrusions formed in the detection zone of the membrane carrier, and have reached the present invention.
- the protrusion A first region located on one side of the protrusion from the center of the protrusion in the width direction of the protrusion.
- the first region of the protrusion has a height H1 in the height direction of the protrusion and a peripheral length L1 along the outer edge of the protrusion.
- the second region of the protrusion has a height H2 in the height direction of the protrusion and a perimeter L2 along the outer edge of the protrusion.
- Arithmetic mean roughness Ra1 of at least a part of the outer edge in the first region of the protrusion calculated by a method including the following steps or in the second region of the protrusion calculated by a method including the following steps.
- Step 1 Extracting the profile of at least a part of the outer edge (Step 2) Trend removing the profile so that the start point and the end point of the profile overlap with the fitting curve of the profile (Step 3) Trend removal Ra1 or Ra2 is calculated by applying 1 ⁇ m for the cutoff value ⁇ c specified in JIS B0601: 2013 without applying the cutoff value ⁇ s specified in JIS B0601: 2013 to the profile.
- Step 3 In the membrane carrier according to the above [1] or [2], The root mean square roughness Rq1 of at least a part of the outer edge in the first region of the protrusion calculated by a method including the following steps or the second region of the protrusion calculated by a method including the following steps.
- Step 1) Extracting the profile of at least a part of the outer edge
- Step 2) Trend removing the profile so that the start point and the end point of the profile overlap with the fitting curve of the profile
- Trend removal Rq1 or Rq2 is calculated by applying 1 ⁇ m for the cutoff value ⁇ c specified in JIS B0601: 2013 without applying the cutoff value ⁇ s specified in JIS B0601: 2013 to the profile.
- the protrusion is a membrane carrier containing a thermoplastic resin.
- a membrane carrier to which a surfactant is attached to the protrusions In the membrane carrier according to any one of the above [1] to [8], A membrane carrier having a height H1 and a height H2 of 5 ⁇ m or more and 1000 ⁇ m or less, respectively. [10] A test kit comprising the membrane carrier according to any one of the above [1] to [9].
- a membrane carrier capable of obtaining a test kit having improved detection sensitivity and a test kit having improved detection sensitivity.
- (A) is an example of the embodiment according to the present invention, is a bird's-eye view (top view) of the uneven structure A, and (b) is a perspective view of the protrusions constituting the concave-convex structure A shown in (a). is there.
- (A) is an example of the embodiment according to the present invention, is a bird's-eye view (top view) of the uneven structure A, and (b) is a perspective view of the protrusions constituting the concave-convex structure A shown in (a). is there.
- (A) is an example of the embodiment according to the present invention, is a bird's-eye view (top view) of the uneven structure A, and (b) is a perspective view of the protrusions constituting the concave-convex structure A shown in (a). is there.
- (A) is an example of the embodiment according to the present invention, is a bird's-eye view (top view) of the uneven structure A, and (b) is a perspective view of the protrusions constituting the concave-convex structure A shown in (a). is there.
- FIG. A is a diagram for explaining a first example of a method of measuring various parameters of a protrusion on which a fine concavo-convex structure B is formed in the concavo-convex structure A, and FIG. It is a figure for demonstrating the 2nd example of the measuring method of various parameters of the protrusion
- FIG. 1 is a schematic view and does not match the actual dimensional ratio.
- the membrane carrier for an inspection kit according to the present embodiment is a membrane carrier for an inspection kit for detecting a substance to be detected in a liquid sample, and transports the liquid sample.
- the flow path can be formed and has a flow path having a detection zone, and the flow path can generate a capillary action for transporting the liquid sample, and has a concave-convex structure A having a protrusion.
- the fine uneven structure B is formed on the surface of the protrusions at least in the detection zone.
- the film carrier includes a detection zone having a first surface (a surface including a flat portion) on which the protrusions are formed.
- the protrusion has a first region and a second region.
- the first region of the protrusion is located on one side of the protrusion from the center of the protrusion in the width direction of the protrusion.
- the second region of the protrusion is located on the other side of the protrusion from the center of the protrusion in the width direction of the protrusion.
- the first region of the protrusion has a height H1 in the height direction of the protrusion and a peripheral length L1 along the outer edge of the protrusion.
- the second region of the protrusion has a height H2 in the height direction of the protrusion and a peripheral length L2 along the outer edge of the protrusion.
- 1.30 ⁇ (L1 / H1 + L2 / H2) / 2 is satisfied.
- the first region and the second region are regions excluding the recess.
- the protrusion has a width W.
- the height and width of the protrusions satisfy a certain relationship, for example, 0.90 ⁇ (H1 + H2) / (2W) ⁇ 1.10.
- (H1 + H2) / (2W) corresponds to the aspect ratio of the protrusion.
- the width and the peripheral length of the protrusions may satisfy a certain relationship, for example, 1.28 ⁇ (L1 + L2) / (2W).
- (L1 + L2) / (2W) corresponds to the perimeter per unit width.
- a silane coupling agent may be attached to the surface of the fine concavo-convex structure B.
- the fine concavo-convex structure B formed on the surface of the protrusion according to the present embodiment has a macroscopic shape such as a stripe shape or a streak shape.
- the test kit membrane carrier according to the present embodiment when L1 and L2 satisfy the above relationship, it is possible to increase the amount of the detected substance carried in the detection zone, and as a result, the detected substance in the liquid sample is detected.
- the sensitivity can be improved.
- the reason why the amount of the detected substance carried in the detection zone can be increased is not clear, but the following reasons can be considered.
- the fact that L1 and L2 satisfy the above relationship is an index indicating that the surface area of the protrusion is increased due to the presence of the fine concavo-convex structure B. Therefore, at least in the detection zone, it is considered that the fine concavo-convex structure B in which L1 and L2 satisfy the above relationship has a structure having a space suitable for supporting the detected substance.
- the test kit membrane carrier according to the present embodiment has a fine concavo-convex structure B in which L1 and L2 satisfy the above relationship at least in the detection zone, it is possible to increase the amount of the detected substance carried in the detection zone. It is considered to be.
- the fine concavo-convex structure B related to the improvement of the detection sensitivity is a fine concavo-convex structure B formed on a portion of the surface of the protrusion where macroscopically large recesses do not exist. It is considered that this is because the macroscopically large recess has a structure having a space unsuitable for supporting the detected substance. A macroscopically large recess may be formed at the tip of the protrusion.
- L1 and L2 should have a circumference excluding the circumference of the outer edge along the macroscopically large recess. From the above, it is considered that the membrane carrier for the test kit according to the present embodiment can improve the detection sensitivity of the substance to be detected in the liquid sample by satisfying the above relationship between L1 and L2.
- the arithmetic mean roughness Ra2 of at least a part of the outer edge in the two regions can be 0.020 ⁇ m or more and 1.000 ⁇ m or less.
- Step 1 Extracting the profile of at least a part of the outer edge (Step 2) Trend removing the profile so that the start point and the end point of the profile overlap with the fitting curve of the profile (Step 3) Trend removal Ra1 or Ra2 is calculated by applying 1 ⁇ m for the cutoff value ⁇ c specified in JIS B0601: 2013 without applying the cutoff value ⁇ s specified in JIS B0601: 2013 to the profile.
- the root mean square roughness Rq2 of at least a part of the outer edge in the second region can be 0.030 ⁇ m or more and 1.000 ⁇ m or less.
- Step 1 Extracting the profile of at least a part of the outer edge (Step 2) Trend removing the profile so that the start point and the end point of the profile overlap with the fitting curve of the profile (Step 3) Trend removal Rq1 or Rq2 is calculated by applying 1 ⁇ m for the cutoff value ⁇ c specified in JIS B0601: 2013 without applying the cutoff value ⁇ s specified in JIS B0601: 2013 to the profile.
- a surfactant may be attached to the protrusions, particularly the surface of the fine concavo-convex structure B.
- the surfactant may be physically adsorbed on the surface of the fine concavo-convex structure B, chemically adsorbed, or directly on the functional group existing on the surface of the fine concavo-convex structure B. It may be combined. Even if the film carrier exhibits water repellency due to the uneven structure A and the fine uneven structure B, the water repellency can be reduced by the surfactant, and the amount of the detected substance supported in the detection zone (particularly, The amount of liquid) can be maintained.
- a silane coupling agent may be attached to the surface of the fine concavo-convex structure B.
- the silane coupling agent may be physically adsorbed on the surface of the fine concavo-convex structure B, chemically adsorbed, or on the functional group existing on the surface of the fine concavo-convex structure B. It may be directly bonded.
- the silane coupling agent according to the present embodiment include a silane coupling agent having an amino group, a silane coupling agent having a mercapto group, a silane coupling agent having an epoxy group, and a silane coupling agent having an acrylic group.
- Examples thereof include a silane coupling agent having a methacryl group, a silane coupling agent having a vinyl group, and a silane coupling agent having an isocyanate group.
- Examples of the silane coupling agent having an amino group include 3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3- (2-aminoethyl) aminopropyltriethoxysilane, and 3- (2-aminoethyl). ) Aminopropyltrimethoxysilane and the like.
- silane coupling agent having a mercapto group examples include 3-mercaptopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, 2-mercaptoethyltrimethoxysilane, 2-mercaptoethyltriethoxysilane and the like.
- silane coupling agent having an epoxy group examples include 3-glycidoxypropyltrimethoxysilane, 5,6-epoxyhexyltriethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, and 3-. Examples thereof include glycidoxypropyltriethoxysilane.
- silane coupling agent having an acrylic group examples include 3-acryloxypropyltrimethoxysilane, 3-acryloxypropylmethyldimethoxysilane, 3-acryloxypropylmethyldiethoxysilane, 3-acryloxypropyltriethoxysilane and the like. Can be mentioned.
- silane coupling agent having a methacryl group examples include 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldiethoxysilane, and 3-methacryloxypropyltriethoxysilane.
- Examples thereof include ⁇ - (methacryloyloxypropyl) trimethoxysilane and ⁇ - (methacryloyloxypropylmethyl) dimethoxysilane.
- Examples of the silane coupling agent having a vinyl group include vinyltriethoxysilane and vinyltrimethoxysilane.
- Examples of the silane coupling agent having an isocyanate group include trimethoxysilylmethyl isocyanate, triethoxysilylmethyl isocyanate, tripropoxysilylmethyl isocyanate, 2-trimethoxysilylethyl isocyanate, 2-triethoxysilylethyl isocyanate, and 2-tri.
- silane coupling agents may be used alone or in combination of two or more. Among these, at least one selected from a silane coupling agent having an amino group and a silane coupling agent having an epoxy group is preferable from the viewpoint that the amount of the detected substance carried in the detection zone can be further increased.
- the amount of the silane coupling agent attached is, for example, in the range of 0.1 mg or more and 10 g or less per 1 m 2 of the surface area of the membrane carrier 3.
- a cross-linking agent (crosslinker) is further adhered to the surface of the fine concavo-convex structure B.
- crosslinker crosslinker
- the detected substance can be stably supported on the surface of the fine concavo-convex structure B.
- This makes it possible to further increase the amount of the detected substance carried in the detection zone.
- the cross-linking agent it becomes possible to support a detection substance that cannot be well adsorbed on the surface of the fine concavo-convex structure B due to steric hindrance or the like, so that the amount of the detection substance supported can be further increased.
- the cross-linking agent may be physically adsorbed on the surface of the fine concavo-convex structure B, chemically adsorbed, or directly bonded to the functional group existing on the surface of the fine concavo-convex structure B. You may be doing it. Further, the cross-linking agent may be physically adsorbed on the surface of the layer containing the silane coupling agent, chemically adsorbed, or directly bonded to the silane coupling agent. ..
- cross-linking agent examples include formaldehyde, glutaaldehyde, dextran, 1,4-phenyldiisocyanate, toluene-2,4 diisocyanate, polyethyleneimine, hexamethylene diisocyanate, hexamethylene diisothiocyanate, N, N'.
- cross-linking agents may be used alone or in combination of two or more.
- glutaraldehyde, dextran, 1,4-phenyldiisocyanate, toluene-2,4 diisocyanate, polyethyleneimine, 1-ethyl-3 from the viewpoint that the amount of the detection substance carried in the detection zone can be further increased.
- At least one cross-linking agent selected from-(3-dimethylaminopropyl) carbodiimide, N-succinimidyl 4- (N-maleimidemethyl) cyclohexane-1-carboxylate and N-hydroxysucciimide is preferred.
- the amount of the cross-linking agent attached is, for example, in the range of 0.1 mg or more and 10 g or less per 1 m 2 of the surface area of the membrane carrier 3.
- the substance to be detected is not limited in any way, and may be any substance capable of antigen-antibody reaction with an antibody, such as various pathogens and various clinical markers.
- Specific examples of the substance to be detected include viral antigens such as influenza virus, norovirus, adenovirus, RS virus, HAV, HBs, and HIV, bacterial antigens such as MRSA, group A lytic bacterium, group B lytic bacterium, and genus Legionella, and bacteria.
- viral antigens such as influenza virus, norovirus, adenovirus, RS virus, HAV, HBs, and HIV
- bacterial antigens such as MRSA, group A lytic bacterium, group B lytic bacterium, and genus Legionella
- bacteria examples of toxins produced by, mycoplasma, chlamydia trachomatis, hormones such as human chorionic gonadotropin, C-reactive protein, myoglobin, myocardial troponin, various tumor markers, pest
- the substance to be detected may be an antigen that can induce an immune reaction by itself, or a hapten that cannot induce an immune reaction by itself but can bind to an antibody by an antigen-antibody reaction.
- the substance to be detected is usually in a suspended or dissolved state in a liquid sample.
- the liquid sample may be, for example, a sample in which the substance to be detected is suspended or dissolved in a buffer solution.
- the liquid sample inspection kit according to the present embodiment (hereinafter, also simply referred to as “inspection kit 18”) has a membrane carrier for the inspection kit according to the present embodiment and detects a substance to be detected in the liquid sample. ..
- FIG. 1 is a schematic top view of the inspection kit.
- the inspection kit 18 includes a membrane carrier 3 and a housing 18a that houses the membrane carrier 3.
- the membrane carrier 3 has a dropping zone 3x on which the liquid sample is dropped and a detection zone 3y for detecting the substance to be detected in the liquid sample on the surface thereof.
- the dropping zone 3x is exposed at the first opening 18b of the housing 18a.
- the detection zone 3y is exposed at the second opening 18c of the housing 18a.
- FIG. 2 is a schematic top view of the membrane carrier 3.
- the membrane carrier 3 includes at least one flow path 2 for transporting a liquid sample.
- An uneven structure A is provided on the bottom surface of the flow path 2 (not shown, details will be described later).
- the uneven structure A is located at least between the dropping zone 3x and the detection zone 3y.
- the uneven structure A may be provided over the entire surface of the film carrier 3.
- the entire surface of the membrane carrier 3 may be the flow path 2 of the liquid sample.
- the uneven structure A causes a capillary action. Due to the capillary action of the concave-convex structure A, the liquid sample is transported from the dropping zone 3x to the detection zone 3y (along the transport direction d) via the concave-convex structure A. When the substance to be detected in the liquid sample is detected in the detection zone 3y, the color of the detection zone 3y changes.
- the overall shape of the membrane carrier 3 is not particularly limited, but may be, for example, a polygon such as a quadrangle, a circle, or an ellipse.
- the vertical width (length in the lateral direction) LS of the membrane carrier 3 may be, for example, 1 mm or more and 100 mm or less
- the lateral width (length in the longitudinal direction) LL of the membrane carrier 3. May be, for example, 1 mm or more and 100 mm or less.
- the thickness of the membrane carrier excluding the height of the uneven structure A may be, for example, 0.1 mm or more and 10 mm or less.
- FIGS. 3 to 6 show an example of the concave-convex structure A provided on the bottom surface of the flow path and the protrusions (also referred to as convex portions) constituting the uneven structure A in the present embodiment, respectively.
- (a) is a bird's-eye view (top view) of the concave-convex structure A
- (b) is a perspective view of the protrusions constituting the concave-convex structure A shown in (a), respectively.
- the uneven structure A (7) is the total of the protrusions 8.
- the membrane carrier 3 includes a flat portion 9 corresponding to the bottom surface of the flow path 2 of the liquid sample, and a plurality of protruding portions 8 protruding from the flat portion 9.
- the first surface is a surface including the flat portion 9.
- the flat portion 9 (the first surface) does not have to be strictly flat.
- the surface roughness of the flat portion 9 (the first surface) between the adjacent protrusions 8 can be made smaller than the surface roughness of the surface of the protrusions 8 (that is, the fine concavo-convex structure B).
- the surface roughness is, for example, the arithmetic mean roughness Ra or the root mean square roughness Rq calculated in the same manner as the above-described method for calculating Ra1, Ra2, Rq1 or Rq2.
- the space between the plurality of protrusions 8 functions as a flow path 2 for transporting the liquid sample along the surface of the membrane carrier 3.
- the voids in the concave-convex structure A (7) function as a flow path 2 for transporting the liquid sample along the surface of the membrane carrier 3.
- the plurality of protrusions 8 may be arranged regularly or in translational symmetry on the surface (first surface) of the membrane carrier 3.
- the shape of the plurality of protrusions 8 constituting the uneven structure A (7) can be freely selected.
- Examples of the shape of the protrusion 8 include a cone, a polygonal pyramid, a truncated cone, a truncated cone, a cylinder, a prism, a hemisphere, and a hemi-ellipsoid.
- Examples of the bottom surface of the concave-convex structure A include a circle or a polygon (for example, a square, a rhombus, a rectangle, a triangle, a hexagon, etc.).
- the shape of the protrusion 8a may be a cone.
- FIG. 3 the shape of the protrusion 8a
- the shape of the protrusion 8b may be a quadrangular pyramid.
- the shape of the protrusion 8c may be a hexagonal pyramid.
- the shape of the protrusion 8d may be a quadrangular prism (a line and space structure in which the protrusion 8d is a line shape).
- a pyramid structure such as a cone or a polygonal pyramid is suitable as the shape of the protrusion 8.
- the cone structures a cone is preferred.
- the shape of the protrusion 8 constituting the uneven structure A (7) does not have to be geometrically accurate, and may be a shape with rounded corners, a shape having fine irregularities on the surface, or the like. There may be.
- the diameter 4 (average diameter) of the bottom surface 10 of the protrusion 8 constituting the uneven structure A (7) is preferably 5 ⁇ m or more and 1000 ⁇ m or less, and more preferably 10 ⁇ m or more and 500 ⁇ m or less.
- the diameter 4 of the bottom surface 10 of the protrusion 8 is not more than the above lower limit value, the accuracy of microfabrication can be suppressed low, and the cost for forming the uneven structure A (7) tends to be low.
- the diameter 4 of the bottom surface 10 of the protrusion 8 is not more than the above upper limit value, the number of protrusions 8 in one inspection kit increases, and the liquid sample can be easily developed.
- the diameter 4 of the bottom surface 10 of the protrusion 8 is, for example, an average value of the diameters of the bottom surface 10 of the five selected protrusions 8 selected from five arbitrary protrusions 8 from the concave-convex structure A (7). Can be adopted.
- the diameter 4 of the bottom surface 10 of the protrusion 8 is defined as the representative length of the bottom surface 10 of the protrusion 8.
- the representative length of the bottom surface 10 is the diameter when the shape of the bottom surface 10 is a circle, the shortest side length when the shape of the bottom surface 10 is a triangle or a quadrangle, the longest diagonal length when the shape of the bottom surface 10 is a polygon of a pentagon or more, and other than that. In the case of a shape, it is the maximum length on the bottom surface 10.
- the diameter 4a of the bottom surface 10a of the protrusion 8a is the diameter of the bottom surface (circle) of the cone.
- the diameter 4b of the bottom surface 10b of the protrusion 8b is the length of the side of the bottom surface (regular quadrangle) 10b.
- the diameter 4c of the bottom surface 10c of the protrusion 8c is the length of the diagonal line passing through the center of the bottom surface (regular hexagon) 10c (the length of the longest diagonal line). It is).
- the diameter 4d of the bottom surface 10d of the protrusion 8d is the length of the shortest side of the bottom surface (rectangle) 10d (in FIG. 6, the transport direction d of the liquid sample). The length in the direction orthogonal to).
- the height 6 (average height) (for example, each of the height H1 and the height H2) of the protrusion 8 constituting the uneven structure A (7) is preferably 5 ⁇ m or more and 1000 ⁇ m or less, more preferably 10 ⁇ m. It is not less than 500 ⁇ m.
- the height 6 of the protrusion 8 is at least the above lower limit value, the volume of the flow path 2 becomes large, and the liquid sample can be developed in a shorter time.
- the height 6 of the protrusion 8 is not more than the above upper limit value, the time and cost for producing the uneven structure A (7) can be reduced, and the uneven structure A (7) can be more easily produced.
- the height 6 of the protrusions 8 for example, five arbitrary protrusions 8 are selected from the uneven structure A (7), and the average value of the heights of the five selected protrusions 8 is adopted. Can be done.
- the height 6 of the protrusion 8 is defined as the maximum length of the protrusion 8 in the direction orthogonal to the flat portion 9. As shown in FIG. 3, when the shape of the protrusion 8a is a cone, the height 6a of the protrusion 8a is the maximum length (height of the cone) of the protrusion 8a in the direction orthogonal to the flat portion 9. .. As shown in FIG. 4, when the shape of the protrusion 8b is a quadrangular pyramid, the height 6b of the protrusion 8b is the maximum length of the protrusion 8b in the direction orthogonal to the flat portion 9 (height of the quadrangular pyramid). Is. As shown in FIG.
- the height 6c of the protrusion 8c is the maximum length of the protrusion 8c in the direction orthogonal to the flat portion 9 (height of the hexagonal cone). Is. As shown in FIG. 6, when the shape of the protrusion 8d is a square pillar, the height 6d of the protrusion 8d is the maximum length of the protrusion 8d in the direction orthogonal to the flat portion 9 (height of the square pillar). Is.
- the distance 5 (average distance) between adjacent protrusions in the uneven structure A (7), that is, the closest distance between the protrusions 8 is preferably 0 or more and 500 ⁇ m or less. It is preferably 500 ⁇ m or less, more preferably 2 ⁇ m or more and 100 ⁇ m or less.
- the distance 5 between adjacent protrusions cannot be smaller than 0 ⁇ m, and when it is equal to or less than the above upper limit value, the contact area between the liquid sample and the flow path 2 increases, which increases the capillary force and thus the liquid. It becomes easier to move the sample.
- the adjacent protrusions 8 are arranged without a gap, the number of protrusions 8 per unit area increases, and the detection signal can be enhanced.
- the "distance between adjacent protrusions" is the closest distance between a pair of adjacent protrusions 8.
- the distance 5 between adjacent protrusions is, for example, the distance between five adjacent protrusions selected by selecting five distances between arbitrary adjacent protrusions from the concave-convex structure A (7). The average value can be adopted.
- the aspect ratio of the protrusion 8 constituting the uneven structure A (7) is preferably 0.1 or more and 10 or less, and more preferably 0.1 or more and 2.0 or less.
- the aspect ratio referred to here is a value (Lh / Lv) obtained by dividing the height 6 (Lh) of the protrusion 8 by the representative length (diameter 4) (Lv) of the bottom surface 10 of the protrusion 8.
- the aspect ratio is at least the above lower limit value, the contact area between the liquid sample and the flow path 2 increases, which increases the capillary force, which makes it easier to move the liquid sample.
- the aspect ratio is not more than the above upper limit value, the uneven structure A can be more easily produced.
- the concave-convex structure A (7) and the film carrier 3 of the inspection kit 18 according to the present embodiment include, for example, a thermoplastic resin.
- the film carrier 3 having the uneven structure A (7) can be produced by processing a film-like base material made of a thermoplastic resin.
- thermo imprinting examples include thermal imprinting, UV imprinting, injection molding, etching, photolithography, mechanical cutting, laser processing and the like.
- thermal imprinting on a thermoplastic resin is suitable as a method for performing precision processing at low cost.
- thermoplastic resin examples include polyester-based resin, polyolefin-based resin, polystyrene-based resin, polycarbonate-based resin, fluorine-based resin, (meth) acrylic-based resin, and the like, and specifically, polyethylene terephthalate (PET) and cycloolefin polymer ( Various types such as COP), polypropylene (PP), polystyrene (PS), polycarbonate (PC), polyvinylidene fluoride (PVDF), polymethyl methacrylate (PMMA), and polyethylene (PE) can be used. These thermoplastic resins may be used alone or in combination of two or more.
- the upper part of the cone is thinner than the bottom surface, so the volume to be machined during mold production is smaller than that of producing a pillar body with the same bottom surface.
- the mold can be manufactured at low cost. In this case, it becomes possible to detect the substance to be detected in the liquid sample at a lower cost.
- the membrane carrier 3 includes a concave-convex structure A (7) provided on one surface of the membrane carrier 3, a flow path 2 formed by the concave-convex structure A (7) for transporting a liquid sample, and a liquid. It is provided with a detection zone (detection unit) 3y for detecting the substance to be detected in the sample.
- the membrane carrier 3 may be the membrane carrier 3 for the test kit 18 that detects the substance to be detected in the liquid sample.
- FIG. 7A is a diagram for explaining a first example of a method for measuring various parameters of the protrusion 8 on which the fine concavo-convex structure B is formed in the concavo-convex structure A (7).
- FIG. 7B is a diagram for explaining a second example of a method for measuring various parameters of the protrusion 8 on which the fine concavo-convex structure B is formed in the concavo-convex structure A (7).
- the x direction indicates the width direction of the protrusion 8
- the y direction indicates the height direction of the protrusion 8.
- FIG. 7A will be described.
- the membrane carrier 3 is cut along a straight line passing through the center of the protrusion 8 when viewed from the upper surface of the membrane carrier 3, and the cut surface of the membrane carrier 3 is observed with a scanning electron microscope (SEM).
- SEM scanning electron microscope
- a cross-sectional SEM image of is obtained.
- the cross-sectional SEM image of the protrusion 8 is analyzed by an image analysis device (for example, a computer on which image analysis software is installed).
- the cross-sectional SEM image of the protrusion 8 in this cross-section SEM image is analyzed by an image analyzer to obtain a fitting curve (for example, a Gaussian distribution curve) for the outer edge of the protrusion 8.
- the fitting curve has a line-symmetrical shape, and the center line C of the protrusion 8 is located on the axis of symmetry of the fitting curve.
- the protrusion 8 has a first region RG1 and a second region RG2.
- the first region RG1 of the protrusion 8 is SS1 on one side of the protrusion 8 from the center line C of the protrusion 8 in the width direction (x direction) of the protrusion 8 (left side in the example shown in FIG. 7A). Is located in.
- the second region RG2 of the protrusion 8 is the SS2 on the other side of the protrusion 8 from the center line C of the protrusion 8 in the width direction (x direction) of the protrusion 8 (in the example shown in FIG. 7A, the right side). Is located in.
- the protrusion 8 has a width W.
- the width W of the protrusion 8 is the distance between the position of the left end of the first region RG1 and the position of the right end of the second region RG2.
- the position of the left end of the first region RG1 and the position of the right end of the second region RG2 are orthogonal to the center line C of the protrusion 8 and the reference line R located at the height 0 of the protrusion 8 and the protrusion. It is the intersection with the outer edge of 8.
- the first region RG1 of the protrusion 8 has a peripheral length L1 along the outer edge of the protrusion 8 (that is, the fine concavo-convex structure B), and the second region RG2 of the protrusion 8 is the outer edge of the protrusion 8. (That is, it has a peripheral length L2 along the fine uneven structure B).
- the surface area S1 of the rotating body of the first region RG1 and the surface area S2 of the rotating body of the second region RG2 can be calculated.
- the surface areas S1 and S2 are calculated separately from each other according to the following formula (2).
- the surface area of the protrusion 8 can be estimated, for example, as the average of the surface area S1 of the rotating body of the first region RG1 and the surface area S2 of the rotating body of the second region RG2.
- the first region RG1 of the protrusion 8 has a height H1 in the height direction (y direction) of the protrusion 8, and the second region RG2 of the protrusion 8 has a height H1 in the height direction (y direction) of the protrusion 8. It has a height H2 in the direction).
- the height H1 of the first region RG1 is the maximum height of the protrusion 8 in the first region RG1
- the height H2 of the second region RG1 is the maximum height of the protrusion 8 in the second region RG2.
- the protrusion 8 has the maximum height at the center line C (for example, FIG. 7A)
- the height H1 of the first region RG1 and the height H2 of the second region RG1 are equal to each other.
- the height H1 of the first region RG1 is higher than the height H2 of the second region RG1. Will also grow.
- the heights H1 and H2 of the protrusion 8 are calculated by analyzing the cross-sectional SEM image of the protrusion 8 with an image analysis device.
- the protrusion 8 has an arithmetic mean roughness Ra1 and a root mean square roughness Rq1 for at least a part of the outer edge of the first region RG1.
- Ra1 and Rq1 are calculated by analyzing the cross-sectional SEM image of the protrusion 8 with an image analysis device according to the method described above.
- the protrusion 8 has an arithmetic mean roughness Ra2 and a root mean square roughness Rq2 for at least a part of the outer edge of the second region RG2.
- Ra2 and Rq2 are calculated by analyzing the cross-sectional SEM image of the protrusion 8 with an image analysis device according to the method described above.
- the surface areas S1 and S2 are large and may satisfy a certain relationship, for example, 70.00 ⁇ (S1 / H1 + S2 / H2) / 2.
- FIG. 7 (b) will be described.
- a recess 8r having a depth of D is formed at the tip of the protrusion 8.
- the depth D is 1.0 ⁇ m or more.
- the depth D of the recess 8r is the distance between the lowermost end B of the recess 8r and the lower of the two upper ends U1 and U2 of the protrusion 8 in the height direction (y direction) of the protrusion 8. Is.
- the upper end U1 of the protrusion 8 is located on one side SS1 with respect to the center line C of the protrusion 8.
- the upper end U2 of the protrusion 8 is located on the other side SS2 with respect to the center line C of the protrusion 8.
- the first region RG1 is a region excluding the recess 8r. Therefore, the outer edge of the protrusion 8 in the first region RG1 includes only a portion that is macroscopically inclined upward toward the center line C of the protrusion 8.
- the second region RG2 is a region excluding the recess 8r. Therefore, the outer edge of the protrusion 8 in the second region RG2 includes only a portion that is macroscopically inclined upward toward the center line C of the protrusion 8.
- the protrusion 8 has a width W.
- the width W of the protrusion 8 is the distance between the position of the left end of the first region RG1 and the position of the right end of the second region RG2.
- the position of the left end of the first region RG1 and the position of the right end of the second region RG2 are determined in the same manner as in the method described with reference to FIG. 7A.
- the circumference L1 is calculated according to the above formula (1).
- the circumference L2 is calculated according to the above equation (1).
- the surface area S1 of the rotating body of the first region RG1 is a function F (t) assuming that a flat surface exists from the upper end U1 of the recess 8r to the center of the protrusion 8, and the protrusion 8 It can be calculated by rotating the center line C of the above as a rotation axis.
- the surface area S2 of the rotating body of the second region RG2 is a function F (t) assuming that a flat surface exists from the upper end U2 of the recess 8r to the center of the protrusion 8. , It can be calculated by rotating the center line C of the protrusion 8 as a rotation axis.
- L1 and L2 in the protrusion 8 on which the fine concavo-convex structure B is formed are adjusted within the above numerical range by adjusting the mold when producing the film carrier 3 having the concavo-convex structure A (7) by thermal imprinting. be able to.
- the mold can be irradiated with a pulse laser a plurality of times.
- the pulsed laser is preferably an ultrashort pulsed laser, for example a femtosecond laser.
- the pulse width of the pulse laser specifically, for example, by making it less than or equal to the femtosecond order, the uneven structure formed on the surface of the mold can be made finer, whereby L1 in the protrusion 8 can be made finer. And L2 can be lengthened.
- the method for manufacturing the inspection kit 18 according to the present embodiment includes a step (thermal imprinting step) of producing the film carrier 3 having the uneven structure A (7) by thermal imprinting.
- the thermal imprinting step the surface of the mold in which a plurality of recesses are formed is applied to, for example, a film-like base material made of a thermoplastic resin, and the base material is heated to form the shape of the recesses.
- a film carrier 3 having an uneven structure A (7) (a plurality of protrusions 8) and a flat portion 9 corresponding to the above is formed.
- At least one atom of a carbon atom and a nitrogen atom and an oxygen atom may be present on the surface of the detection zone.
- the ratio of the number of oxygen atoms to the total number of atoms of each atom is 0.01 or more and 0.50 or less.
- the oxygen atomic number ratio (number of oxygen atoms / (number of carbon atoms + number of nitrogen atoms + number of oxygen atoms)) on the surface of the detection zone is 0.01 or more, and 0.05 or more.
- 0.10 or more is more preferable, and 0.20 or more is further preferable.
- the oxygen atomic number ratio (number of oxygen atoms / (number of carbon atoms + number of nitrogen atoms + number of oxygen atoms)) on the surface of the detection zone is 0.50 or less, and 0.40 or less.
- 0.38 or less is more preferable
- 0.36 or less is further preferable
- 0.30 or less is even more preferable
- 0.10 or less is even more preferable.
- the higher the oxygen atom number ratio on the surface of the detection zone the easier it is for the detected substance to adhere to the surface. By adhering the detected substance to the surface, the detected substance that is washed away when the liquid sample is developed is reduced, and highly sensitive inspection becomes possible.
- the oxygen atom number ratio on the surface of the detection zone is not more than the above upper limit value, the occurrence of erroneous detection due to the reaction between the labeling substance and the detection substance when the solution containing no substance to be detected is developed is further suppressed.
- the oxygen atom number ratio on the surface of the detection zone is calculated by X-ray electron spectroscopy (XPS). The calculation of the oxygen atom number ratio by XPS is described below.
- the binding energy correction of the spectrum obtained by the measurement is performed by the CC bond in the C1s spectrum.
- the background (BG) is subtracted for each peak of the C1s spectrum, the N1s spectrum, and the O1s spectrum of the spectrum subjected to the binding energy correction. Divide the peak area (signal intensity) of each atom calculated by subtracting BG from each peak by the correction coefficient (relative sensitivity coefficient, transmission function, and kinetic energy correction) so that the total area after correction becomes 100. Calculated in.
- Each of the obtained values is defined as the number of carbon atoms, the number of nitrogen atoms, and the number of oxygen atoms, and the oxygen atomic number ratio (the number of oxygen atoms / (the number of carbon atoms + the number of nitrogen atoms + the number of oxygen atoms)) is calculated.
- the oxygen atomic number ratio on the surface of the detection zone can be adjusted within the above range by surface-treating the surface of the detection zone.
- the surface treatment method is not limited in any way, and various methods such as various plasma treatments, corona treatments, UV irradiation, and surface modification by UV / ozone treatment can be used.
- the detected substance does not adhere to the non-detection zone (region other than the detection zone) in the flow path, and the detected substance can be adhered only to the detection zone with high efficiency. As a result, the detection signal can be easily recognized in the detection zone (the S / N ratio becomes high).
- FIG. 8 is a diagram for explaining a method of selectively surface-treating the surface of the detection zone.
- the shield 14 having the void portion is arranged on the membrane carrier 3 to expose the detection zone (surface treatment portion).
- the portion of the membrane carrier 3 covered with the shield 14 becomes the untreated portion (non-detection zone) 15.
- a metal plate is preferable.
- a resin having a surface oxygen atomic number ratio oxygen atomic number / (carbon atomic number + nitrogen atomic number + oxygen atomic number)) of less than 0.01. It is more preferable to use a resin of 0.005 or less.
- a resin having an oxygen atom number ratio on the surface of less than 0.01 is a resin that does not contain oxygen atoms in the structural formula of the main component, contains carbon atoms such as polyolefin resin, polystyrene resin, and fluororesin, and has nitrogen atoms. And it may be a resin containing no oxygen atom.
- the resin having an oxygen atom number ratio on the surface of less than 0.01 may be a resin containing carbon atoms and nitrogen atoms such as a polyimide resin and not containing oxygen atoms.
- the oxygen atom number ratio (number of oxygen atoms / (number of carbon atoms + number of nitrogen atoms + number of oxygen atoms)) in the detection zone is the number of oxygen atoms /. It is substantially equal to the value of (number of carbon atoms + number of oxygen atoms).
- a membrane carrier is prepared, a test kit is prepared using the prepared membrane carrier, and adhesion of a labeling substance in a non-detection zone when a liquid sample is developed. Is more suppressed.
- the labeling substance adheres in the non-detection zone, even if a signal having the same intensity is generated in the detection zone, it becomes difficult to recognize (the S / N ratio becomes low).
- a membrane carrier is prepared, a test kit is prepared using the prepared membrane carrier, and adhesion of a labeling substance in a non-detection zone when a liquid sample is developed. Is more suppressed.
- the labeling substance adheres in the non-detection zone, even if a signal having the same intensity is generated in the detection zone, it becomes difficult to recognize (the S / N ratio becomes low).
- the detection zone 3y of the membrane carrier 3 shows a color change when the substance to be detected is detected.
- the color change may be a color change that can be confirmed by an optical method.
- the above optical methods mainly include two methods: visual judgment and measurement of fluorescence / emission intensity.
- visual determination the color difference between the two color stimuli when the colors before and after the detection are measured in the color system of the CIE1976L * a * b * color space (JIS Z8781-4: 2013).
- ⁇ E a color change occurs so that ⁇ E) of is 0.5 or more.
- ⁇ E a color change occurs so that ⁇ E of is 0.5 or more.
- the fluorescence / emission intensity is measured and determined, the fluorescence / emission intensity in the detection zone 3y (Fl1) and the fluorescence / emission intensity in the upstream and downstream regions adjacent to the detection zone 3y (Fl2).
- the detection substance is immobilized in at least a part of the flow path 2 in one embodiment. That is, the detection substance for detecting the substance to be detected is fixed in the detection zone 3y. The color change in the detection zone 3y occurs when the substance to be detected is held in the detection zone 3y by the detection substance (reacting with the detection substance).
- the manufacturing method of the inspection kit 18 includes a step of fixing the detected substance in the detection zone 3y, which causes a color change by holding the substance to be detected in the detection zone 3y.
- the surface treatment may be applied in advance to the portion of the membrane carrier 3 where the detection zone 3y is provided.
- the surface treatment method the method exemplified above can be used.
- examples of the detection substance include an antibody.
- the antibody is an antibody that reacts with the substance to be detected by an antigen-antibody, and may be a polyclonal antibody or a monoclonal antibody.
- the color change in the detection zone 3y may be caused by an antibody that specifically reacts with the substance to be detected in the liquid sample or a labeled substance having an antigen-binding fragment thereof.
- the color change occurs, for example, when the labeled substance is held in the detection zone 3y by the detection substance (reacts (bonds) with the detection substance) and develops color.
- the labeled substance may be, for example, a labeled antibody such as a fluorescently labeled antibody, a chemically luminescently labeled antibody, or an enzyme-labeled antibody, and the antibody or its antigen-binding property to particles such as colloidal particles and latex particles. It may be a combination of fragments.
- the antigen-binding fragment refers to a fragment capable of specifically binding to a substance to be detected, for example, an antigen-binding fragment of an antibody.
- the labeled substance can bind to the substance to be detected via an antibody or an antigen-binding fragment thereof.
- the particles may be magnetic or fluorescent. Examples of the colloidal particles include gold colloidal particles and metal colloidal particles of platinum colloidal particles.
- the particles are preferably latex particles in terms of particle size control, dispersion stability and ease of bonding.
- the material of the latex particles is not particularly limited, but polystyrene is preferable.
- the particles are preferably colored particles or fluorescent particles, and more preferably colored particles.
- the colored particles may be those whose color can be detected with the naked eye.
- the fluorescent particles may contain a fluorescent substance.
- the particles may be colored latex particles or fluorescent latex particles.
- the above-mentioned color change is preferably visually determined.
- the particles are fluorescent latex particles, the above-mentioned color change is suitably determined by measuring the fluorescence intensity.
- the labeled body as described above is provided in at least a part of the test kit 18 so that it can react with the substance to be detected in the liquid sample to be dropped.
- the label may be provided on, for example, a member in the inspection kit 18, and may be provided on at least a part of the flow path 2 of the membrane carrier 3 (upstream from the detection zone 3y). Then, the labeled body that has reacted (bonded) with the detected substance is held in the detection zone 3y by the detected substance (by reacting (binding) with the detected substance). As a result, a color change (coloration by the marker) occurs in the detection zone 3y.
- the liquid sample inspection method according to one aspect of the present embodiment is an inspection method using the inspection kit 18.
- a mixed liquid sample (mixed liquid sample) is prepared by mixing the liquid sample and a labeled substance that specifically binds to the substance to be detected in the liquid sample.
- the mixed liquid sample is dropped from the dropping zone 3x by the step of binding the substance to be detected and the labeled substance to each other, the step of dropping the mixed liquid sample into the dropping zone 3x provided on the membrane carrier 3, and the uneven structure A (7). It may include a step of transporting to the detection zone 3y and a step of detecting a color change (coloring of the marker) in the detection zone 3y.
- the substance to be detected is bound to the labeled substance via the antigen-binding fragment thereof, and the substance to be detected is bound to the reagent fixed in the detection zone 3y to detect the color change in the detection zone 3y (presence or absence of the color change). It may include a step (which is determined optically).
- the method of mixing the liquid sample and the labeled body is not particularly limited.
- a method of adding a liquid sample to a container containing a labeled body may be used, or for example, a liquid containing the labeled body and a liquid sample may be mixed.
- a filter may be sandwiched between the dropping ports of the container containing the liquid sample, and the labeled body may be immobilized in the filter.
- Example 1 ⁇ Preparation of membrane carrier> A polycarbonate sheet (manufactured by Teijin Co., Ltd., thickness 200 ⁇ m) is heat-imprinted, and the diameter of the bottom surface of the concave-convex structure A (projection) (hereinafter, also referred to as “projection diameter” or “diameter”) is 30 ⁇ m.
- Conical protrusions 8 having a concave-convex structure A (protrusion) height (hereinafter, also referred to as “height”) of 30 ⁇ m are arranged in a triangular array as shown in FIG. 3 with the average distance between the centers of the protrusions being 30 ⁇ m. Film carriers arranged in the form were prepared.
- the vertically adjacent protrusions 8 are arranged without gaps, and in FIG. 3, the diagonally adjacent protrusions 8 are arranged without gaps (the distance 5 shown in FIG. 3 becomes 0). There is.).
- a laser-machined mold is used to form a fine concavo-convex structure B on the surface of the concavo-convex structure A (projection), and further a fine concavo-convex structure B is formed.
- L1, L2, H1 and H2 of the projected protrusions 8 were adjusted to the values shown in Table 1, respectively.
- the types of molds used are as follows.
- Laser machining equipment (ultrashort pulse laser manufactured by Tosei Electrobeam Co., Ltd.) in which conical holes with a diameter of 30 ⁇ m and a depth of 30 ⁇ m at the entrance of the hole are lined up in a triangular arrangement with an average distance of 30 ⁇ m between the centers of the holes.
- a mold was obtained by irradiating pulse light multiple times from a processing machine R-200, laser wavelength: 1552 nm, rated output: 10 W, pulse: femtosecond).
- a macroscopically large recess (for example, the recess 8r shown in FIG. 7B) was not formed at the tip of the protrusion 8.
- a computer on which analysis software (MATLAB manufactured by MathWorks) was installed was used as an image analysis device (see FIG. 7A).
- Ra1 and Rq1 are calculated for the outer edge of the first region RG1 of the protrusion 8 according to the method described in the embodiment, and the outer edge of the second region RG2 of the protrusion 8 is calculated.
- Ra2 and Rq2 were calculated.
- Ra1 and Rq1 are calculated from the height of the flat portion 9 to 1 ⁇ m in the first region RG1 and the outer edge of the portion from this height to the height of 25 ⁇ m, and Rq2 and Ra2 are in the second region RG2. It was calculated from the height of the flat portion 9 to 1 ⁇ m and the outer edge of the portion from this height to the height of 25 ⁇ m.
- Fluorescently labeled anti-CRP (C-reactive protein) antibody is diluted with a prepared buffer (composition: 50 mM Tris buffer pH 7.5, trehalose 2 (w / v)%) to a concentration of 0.1 mg / A mL anti-CRP antibody solution was prepared and 1 ⁇ L was applied to the membrane carrier 3. After drying at 45 ° C. for 1 hour, it was ultrasonically washed in a 2 (v / v)% aqueous solution of Triton X-100 (trade name). After drying at room temperature, the fluorescence intensity of the remaining antibody was evaluated using a fluorescence microscope (BZ-X710 manufactured by KEYENCE CORPORATION).
- Example 2 was the same as that of Example 1 except for the type of mold.
- the types of molds used are as follows.
- Laser machining equipment (ultrashort pulse laser manufactured by Tosei Electrobeam Co., Ltd.) in which conical holes with a diameter of 30 ⁇ m and a depth of 30 ⁇ m at the entrance of the hole are lined up in a triangular arrangement with an average distance of 30 ⁇ m between the centers of the holes.
- a mold was obtained by irradiating pulse light multiple times from a processing machine R-200, laser wavelength: 1552 nm, rated output: 10 W, pulse: femtosecond). As shown in FIG.
- the comparative example was the same as in Example 1 except for the type of mold.
- the types of molds used are as follows. A conical hole with a diameter of 30 ⁇ m and a depth of 30 ⁇ m at the entrance of the hole is cut into nickel dies arranged in a triangular array system with an average distance between the centers of the holes of 30 ⁇ m (laser used in Examples 1 and 2). A mold was obtained (without using a processing device). As shown in FIG. 7B, a macroscopically large recess 8r was formed at the tip of the protrusion 8. The results obtained are shown in Table 1. Each parameter was measured by the method described with reference to FIG. 7 (b).
- the membrane carrier for the test kit according to the present embodiment can increase the amount of antibody carried as a detection substance and detect the substance to be detected with high sensitivity by satisfying a specific relationship between L1 and L2. It has been shown.
- (L1 / H1 + L2 / H2) / 2 can be estimated to be preferably 1.30 or more
- Ra1 or Ra2 can be estimated to be preferably 0.020 ⁇ m or more
- (S1 / H1 + S2 / H2) / 2 is preferably 70.00 ⁇ m or more.
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Immunology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hematology (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Urology & Nephrology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Clinical Laboratory Science (AREA)
- Dispersion Chemistry (AREA)
- Biotechnology (AREA)
- Microbiology (AREA)
- Cell Biology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
Abstract
Description
突起部が形成された第1面を有する検知ゾーンを備え、
一断面において、前記突起部は、
前記突起部の幅方向において前記突起部の中心から前記突起部の一方の側に位置する第1領域と、
前記突起部の前記幅方向において前記突起部の前記中心から前記突起部の他方の側に位置する第2領域と、
を有し、
前記一断面において、前記突起部の前記第1領域は、前記突起部の高さ方向において高さH1を有し、かつ前記突起部の外縁に沿った周長L1を有し、
前記一断面において、前記突起部の前記第2領域は、前記突起部の前記高さ方向において高さH2を有し、かつ前記突起部の外縁に沿った周長L2を有し、
1.30≦(L1/H1+L2/H2)/2が満たされている、膜担体。
[2]
上記[1]に記載の膜担体において、
以下の工程を含む方法によって算出される前記突起部の前記第1領域における前記外縁の少なくとも一部分の算術平均粗さRa1又は以下の工程を含む方法によって算出される前記突起部の前記第2領域における前記外縁の少なくとも一部分の算術平均粗さRa2が0.020μm以上1.000μm以下である、膜担体。
(工程1)前記外縁の前記少なくとも一部分のプロファイルを抽出すること
(工程2)前記プロファイルの始点及び終点が前記プロファイルのフィッティング曲線と重なるように前記プロファイルをトレンド除去すること
(工程3)トレンド除去されたプロファイルに対して、JIS B0601:2013に規定されるカットオフ値λsを適用せずに、JIS B0601:2013に規定されるカットオフ値λcにつき1μmを適用して、Ra1又はRa2を算出すること
[3]
上記[1]又は[2]に記載の膜担体において、
以下の工程を含む方法によって算出される前記突起部の前記第1領域における前記外縁の少なくとも一部分の二乗平均平方根粗さRq1又は以下の工程を含む方法によって算出される前記突起部の前記第2領域における前記外縁の少なくとも一部分の二乗平均平方根粗さRq2が0.030μm以上1.000μm以下である、膜担体。
(工程1)前記外縁の前記少なくとも一部分のプロファイルを抽出すること
(工程2)前記プロファイルの始点及び終点が前記プロファイルのフィッティング曲線と重なるように前記プロファイルをトレンド除去すること
(工程3)トレンド除去されたプロファイルに対して、JIS B0601:2013に規定されるカットオフ値λsを適用せずに、JIS B0601:2013に規定されるカットオフ値λcにつき1μmを適用して、Rq1又はRq2を算出すること
[4]
上記[1]から[3]までのいずれか一つに記載の膜担体において、
前記第1面は、規則的に、又は、並進対称的に並んでおり、前記突起部を含む複数の突起部を有する、膜担体。
[5]
上記[4]に記載の膜担体において、
隣り合う突起部の間における前記第1面の表面粗さは、前記突起部の表面の表面粗さより小さい、膜担体。
[6]
上記[4]又は[5]に記載の膜担体において、
隣り合う突起部の最近接距離は、0以上500μm以下である、膜担体。
[7]
上記[1]から[6]までのいずれか一つに記載の膜担体において、
前記突起部は、熱可塑性樹脂を含む、膜担体。
[8]
上記[1]から[7]までのいずれか一つに記載の膜担体において、
前記突起部には、界面活性剤が付着している、膜担体。
[9]
上記[1]から[8]までのいずれか一つに記載の膜担体において、
前記高さH1及び前記高さH2のそれぞれは、5μm以上1000μm以下である、膜担体。
[10]
上記[1]から[9]までのいずれか一つに記載の膜担体を備える検査キット。
本実施形態に係る検査キット用膜担体(単に「膜担体」ともいう)は、液体試料中の被検出物質を検出するための検査キット用の膜担体であって、上記液体試料を輸送でき、かつ、検知ゾーンを有する流路を備え、上記流路は、上記液体試料を輸送するための毛細管作用を生じさせることができるとともに、突起部を有する凹凸構造Aを有する。
そして、本実施形態に係る検査キット用膜担体は、少なくとも上記検知ゾーンにおいて、上記突起部の表面に微細凹凸構造Bが形成されている。膜担体は、上記突起部が形成された第1面(平坦部を含む面)を有する検知ゾーンを備えている。一断面において、上記突起部は、第1領域及び第2領域を有している。上記突起部の前記第1領域は、上記突起部の幅方向において上記突起部の中心から上記突起部の一方の側に位置している。上記突起部の上記第2領域は、上記突起部の上記幅方向において上記突起部の上記中心から上記突起部の他方の側に位置している。上記一断面において、上記突起部の上記第1領域は、上記突起部の上記高さ方向において高さH1を有し、かつ上記突起部の外縁に沿った周長L1を有している。上記一断面において、上記突起部の上記第2領域は、上記突起部の上記高さ方向において高さH2を有し、かつ上記突起部の外縁に沿った周長L2を有している。上記膜担体においては、1.30≦(L1/H1+L2/H2)/2が満たされている。ここで、上記一断面において上記突起部の先端に深さ1.0μm以上の凹部が形成されている場合、上記第1領域及び上記第2領域は、上記凹部を除いた領域である。
上記一断面において、上記突起部は、幅Wを有している。上記膜担体においては、上記突起部の高さ及び幅は、一定の関係、例えば、0.90≦(H1+H2)/(2W)≦1.10を満たしている。ここで、(H1+H2)/(2W)は、上記突起部のアスペクト比に相当する。
上記膜担体においては、上記突起部の幅及び周長は、一定の関係、例えば、1.28≦(L1+L2)/(2W)を満たしていてもよい。ここで、(L1+L2)/(2W)は、単位幅当たりにおける周長に相当する。
なお、上記微細凹凸構造Bの表面にはシランカップリング剤が付着していてもよい。
また、本実施形態に係る突起部の表面に形成された微細凹凸構造Bは、マクロ的には、縞状や筋状等の形状を有している。
検知ゾーンの検出物質担持量を増加させることができる理由は明らかではないが、以下の理由が考えられる。
まず、L1及びL2が上記関係を満たすことは、突起部の表面積が微細凹凸構造Bの存在によって大きくなっていることを示す指標となる。
そのため、少なくとも上記検知ゾーンにおいて、L1及びL2が上記関係を満たす微細凹凸構造Bは、検出物質を担持するために適した空間を有する構造になっていると考えられる。よって、本実施形態に係る検査キット用膜担体は、少なくとも上記検知ゾーンにおいて、L1及びL2が上記関係を満たす微細凹凸構造Bを有するため、検知ゾーンの検出物質担持量を増加させることが可能になると考えられる。
ただし、検出感度の向上に関わる微細凹凸構造Bは、上記突起部の表面のうちマクロ的に大きな凹部が存在しない部分に形成された微細凹凸構造Bであると考えられる。これは、マクロ的に大きな凹部は、検出物質を担持するために適しない空間を有する構造になっているからと考えられる。上記突起部の先端にはマクロ的に大きな凹部が形成される場合がある。この場合、L1及びL2は、マクロ的に大きな凹部に沿った外縁の周長を除く周長にすべきとなる。
以上から、本実施形態に係る検査キット用膜担体は、L1及びL2が上記関係を満たすことによって、液体試料中の被検出物質の検出感度を向上させることができると考えられる。
(工程1)上記外縁の前記少なくとも一部分のプロファイルを抽出すること
(工程2)上記プロファイルの始点及び終点が上記プロファイルのフィッティング曲線と重なるように上記プロファイルをトレンド除去すること
(工程3)トレンド除去されたプロファイルに対して、JIS B0601:2013に規定されるカットオフ値λsを適用せずに、JIS B0601:2013に規定されるカットオフ値λcにつき1μmを適用して、Ra1又はRa2を算出すること
(工程1)上記外縁の前記少なくとも一部分のプロファイルを抽出すること
(工程2)上記プロファイルの始点及び終点が上記プロファイルのフィッティング曲線と重なるように上記プロファイルをトレンド除去すること
(工程3)トレンド除去されたプロファイルに対して、JIS B0601:2013に規定されるカットオフ値λsを適用せずに、JIS B0601:2013に規定されるカットオフ値λcにつき1μmを適用して、Rq1又はRq2を算出すること
本実施形態に係る界面活性剤としては、
コール酸ナトリウム、デオキシコール酸ナトリウム、ラウリル硫酸ナトリウム、スクロースモノコレート;
β-D-フラクトピラノシル-α-D-グルコピラノシドモノドデカノエート、β-D-フラクトピラノシル-α-D-グルコピラノシドモノデカノエート;
n-オクタノイル-N-メチルグルカミド、n-ノナノイル-N-メチルグルカミド、n-デカノイル-N-メチルグルカミド、n-オクチル-β-D-チオグルコピラノシド、n-オクチル-β-D-マルトピラノシド、n-オクチル-β-D-グルコピラノシド、n-ノニル-β-D-チオマルトピラノシド、n-ドデシル-β-D-マルトピラノシド、n-デシル-β-D-マルトピラノシド;
N,N-ビス(3-D-グルコンアミドプロピル)コラミド、N,N-ビス(3-D-グルコンアミドプロピル)デオキシコラミド;
3-[(3-コラミドプロピル)ジメチルアンモニオ]プロパンスルホン酸、3-[(3-コラミドプロピル)ジメチルアンモニオ]-2-ヒドロキシプロパンスルホン酸;
ツビッタージェント(ZWITTERGENT)3-10デタージェント(商品名)カルビオケム製、ツビッタージェント3-12デタージェント(商品名)カルビオケム製、ツビッタージェント3-14デタージェント(商品名)カルビオケム製;
TritonX-100(商品名):ポリエチレングリコールモノ-р-イソオクチルフェニルエーテル(ナカライテスク(株))、Tween20:ポリオキシエチレンソルビタンモノラウレート(ナカライテスク(株))、Tween80:ポリオキシエチレンソルビタンモノオレエート(ナカライテスク(株))、NP-40:ノニデット P-40(ナカライテスク(株))、Zwittergent:Zwittergent 3-14(カルビオケム(株))、SDS:ドデシル硫酸ナトリウム(ナカライテスク(株))、CHAPS:3-[(3-コラミドプロピル)ジメチルアンモニオ]プロパンスルホン酸(同仁化学(株))等;あるいはこれらを2種類以上組み合わせ、又は混合したものを用いることができるが、これらに限定されない。
本実施形態に係るシランカップリング剤としては、例えば、アミノ基を有するシランカップリング剤、メルカプト基を有するシランカップリング剤、エポキシ基を有するシランカップリング剤、アクリル基を有するシランカップリング剤、メタクリル基を有するシランカップリング剤、ビニル基を有するシランカップリング剤及びイソシアネート基を有するシランカップリング剤等が挙げられる。
アミノ基を有するシランカップリング剤としては、例えば、3-アミノプロピルトリエトキシシラン、3-アミノプロピルトリメトキシシラン、3-(2-アミノエチル)アミノプロピルトリエトキシシラン、3-(2-アミノエチル)アミノプロピルトリメトキシシラン等が挙げられる。
メルカプト基を有するシランカップリング剤としては、例えば、3-メルカプトプロピルトリメトキシシラン、3-メルカプトプロピルトリエトキシシラン、2-メルカプトエチルトリメトキシシラン、2-メルカプトエチルトリエトキシシラン等が挙げられる。
エポキシ基を有するシランカップリング剤としては、例えば、3-グリシドキシプロピルトリメトキシシラン、5,6-エポキシヘキシルトリエトキシシラン、2-(3,4-エポキシシクロヘキシル)エチルトリメトキシシラン、3-グリシドキシプロピルトリエトキシシラン等が挙げられる。
アクリル基を有するシランカップリング剤としては、例えば、3-アクリロキシプロピルトリメトキシシラン、3-アクリロキシプロピルメチルジメトキシシラン、3-アクリロキシプロピルメチルジエトキシシラン、3-アクリロキシプロピルトリエトキシシラン等が挙げられる。
メタクリル基を有するシランカップリング剤としては、例えば、3-メタクリロキシプロピルメチルジメトキシシラン、3-メタクリロキシプロピルトリメトキシシラン、3-メタクリロキシプロピルメチルジエトキシシラン、3-メタクリロキシプロピルトリエトキシシラン、γ-(メタクリロイルオキシプロピル)トリメトキシシラン、γ-(メタクリロイルオキシプロピルメチル)ジメトキシシラン等が挙げられる。
ビニル基を有するシランカップリング剤としては、例えば、ビニルトリエトキシシラン、ビニルトリメトキシシラン等が挙げられる。
イソシアネート基を有するシランカップリング剤としては、例えば、トリメトキシシリルメチルイソシアネート、トリエトキシシリルメチルイソシアネート、トリプロポキシシリルメチルイソシアネート、2-トリメトキシシリルエチルイソシアネート、2-トリエトキシシリルエチルイソシアネート、2-トリプロポキシシリルエチルイソシアネート、3-トリメトキシシリルプロピルイソシアネート、3-トリエトキシシリルプロピルイソシアネート、3-トリプロポキシシリルプロピルイソシアネート、4-トリメトキシシリルブチルイソシアネート、4-トリエトキシシリルブチルイソシアネート、4-トリプロポキシシリルブチルイソシアネート等が挙げられる。
これらのシランカップリング剤は一種単独で用いてもよいし、二種以上を組み合わせて用いてもよい。
これらの中でも、検知ゾーンの検出物質担持量をより一層増加させることが可能な点から、アミノ基を有するシランカップリング剤及びエポキシ基を有するシランカップリング剤から選択される少なくとも一種が好ましい。
また、架橋剤を用いることで、立体障害等によって、上記微細凹凸構造Bの表面に上手く吸着できない検出物質も担持することができるようになるため、検出物質担持量をより一層増加させることができる。
ここで、架橋剤は、微細凹凸構造Bの表面に物理的に吸着していてもよいし、化学的に吸着していてもよいし、微細凹凸構造Bの表面に存在する官能基に直接結合していてもよい。また、架橋剤は、シランカップリング剤を含む層の表面に物理的に吸着していてもよいし、化学的に吸着していてもよいし、シランカップリング剤に直接結合していてもよい。
これらの架橋剤は一種単独で用いてもよいし、二種以上を組み合わせて用いてもよい。
これらの中でも、検知ゾーンの検出物質担持量をより一層増加させることが可能な点から、グルタルアルデヒド、デキストラン、1,4-フェニルジイソシアネート、トルエン-2,4ジイソシアネート、ポリエチレンイミン、1-エチル-3-(3-ジメチルアミノプロピル)カルボジイミド、N-スクシンイミジル4-(N-マレイミドメチル)シクロヘキサン-1-カルボキシレート及びN-ヒドロキシスクシイミドから選択される少なくとも一種の架橋剤が好ましい。
ここで、突起部8の底面10の径4は、例えば、凹凸構造A(7)から任意の突起部8を5個選択し、選択した5個の突起部8の底面10の径の平均値を採用することができる。
ここで、突起部8の高さ6は、例えば、凹凸構造A(7)から任意の突起部8を5個選択し、選択した5個の突起部8の高さの平均値を採用することができる。
ここで、隣接する突起部間の距離5は、例えば、凹凸構造A(7)から任意の隣接する突起部間の距離を5個選択し、選択した5個の隣接する突起部間の距離の平均値を採用することができる。
熱可塑性樹脂としてはポリエステル系樹脂、ポリオレフィン系樹脂、ポリスチレン系樹脂、ポリカーボネート系樹脂、フッ素系樹脂及び(メタ)アクリル系樹脂等が挙げられ、具体的にはポリエチレンテレフタレート(PET)、シクロオレフィンポリマー(COP)、ポリプロピレン(PP)、ポリスチレン(PS)、ポリカーボネート(PC)、ポリフッ化ビニリデン(PVDF)、ポリメタクリル酸メチル(PMMA)、ポリエチレン(PE)等様々な種類のものを用いることができる。これらの熱可塑性樹脂は1種単独で用いてもよいし、2種以上を組み合わせて用いてもよい。
<膜担体の準備>
ポリカーボネートシート(帝人社製、膜厚200μm)に熱インプリントを施し、凹凸構造A(突起部)の底面の径(以下、「突起部の径」又は、「径」ということもある)30μm、凹凸構造A(突起部)の高さ(以下、「高さ」ということもある)30μmの円錐型の突起部8が、突起部の中心間の平均距離を30μmとして図3のような三角配列形式で並んだ膜担体を作製した。すなわち、図3において縦方向に隣り合う突起部8が隙間なく並べられ、図3において斜め方向に隣り合う突起部8が隙間なく並べられている(図3に示した距離5が0となっている。)。
ここで、熱インプリントを施す際に、レーザー加工された金型(モールド)を用いることによって、凹凸構造A(突起部)の表面に微細凹凸構造Bを形成し、さらに微細凹凸構造Bが形成された突起部8のL1、L2、H1及びH2を表1に示す値にそれぞれ調整した。
用いた金型の種類は、以下のとおりである。
穴の入り口の直径30μm、深さ30μmの円錐型の穴が、穴の中心間の平均距離を30μmとして三角配列方式で並んだニッケル金型にレーザー加工装置(東成エレクトロビーム社製 極短パルスレーザー加工機 R-200、レーザー波長:1552nm、定格出力:10W、パルス:フェムト秒)からパルス光を複数回照射して金型を得た。
さらに、上記画像解析装置を用いて、実施形態で説明した方法にしたがって、突起部8の第1領域RG1の外縁について、Ra1及びRq1を算出し、突起部8の第2領域RG2の外縁について、Ra2及びRq2を算出した。Ra1及びRq1は、第1領域RG1のうちの平坦部9から1μmの高さから、この高さから25μmの高さまでの部分の外縁から算出し、Rq2及びRa2は、第2領域RG2のうちの平坦部9から1μmの高さから、この高さから25μmの高さまでの部分の外縁から算出した。
蛍光標識した抗CRP(C反応性蛋白)抗体を、調整した緩衝液(組成:50mMトリス緩衝液 pH 7.5、トレハロース2(w/v)%)で希釈することで、濃度0.1mg/mLの抗CRP抗体溶液を調製し、膜担体3に1μL塗布した。45℃、1時間で乾燥した後、Triton X-100(商品名)2(v/v)%水溶液中で超音波洗浄した。室温で乾燥した後、蛍光顕微鏡(キーエンス社製BZ-X710)を用いて、残存した抗体の蛍光強度を評価した。
実施例2は、金型の種類を除いて、実施例1と同様とした。
用いた金型の種類は、以下のとおりである。
穴の入り口の直径30μm、深さ30μmの円錐型の穴が、穴の中心間の平均距離を30μmとして三角配列方式で並んだアルミニウム金型にレーザー加工装置(東成エレクトロビーム社製 極短パルスレーザー加工機 R-200、レーザー波長:1552nm、定格出力:10W、パルス:フェムト秒)からパルス光を複数回照射して金型を得た。
図7(a)に示すように、突起部8の先端には、マクロ的に大きな凹部(例えば、図7(b)に示す凹部8r)は形成されなかった。得られた結果を表1に示す。各パラメータは、図7(a)を用いて説明した方法によって測定した。
比較例は、金型の種類を除いて、実施例1と同様とした。
用いた金型の種類は、以下のとおりである。
穴の入り口の直径30μm、深さ30μmの円錐型の穴が、穴の中心間の平均距離を30μmとして三角配列方式で並んだニッケル金型を切削して(実施例1及び2で用いたレーザー加工装置を用いないで)金型を得た。
図7(b)に示すように、突起部8の先端に、マクロ的に大きな凹部8rが形成されていた。得られた結果を表1に示す。各パラメータは、図7(b)を用いて説明した方法によって測定した。
Claims (10)
- 突起部が形成された第1面を有する検知ゾーンを備え、
一断面において、前記突起部は、
前記突起部の幅方向において前記突起部の中心から前記突起部の一方の側に位置する第1領域と、
前記突起部の前記幅方向において前記突起部の前記中心から前記突起部の他方の側に位置する第2領域と、
を有し、
前記一断面において、前記突起部の前記第1領域は、前記突起部の高さ方向において高さH1を有し、かつ前記突起部の外縁に沿った周長L1を有し、
前記一断面において、前記突起部の前記第2領域は、前記突起部の前記高さ方向において高さH2を有し、かつ前記突起部の外縁に沿った周長L2を有し、
1.30≦(L1/H1+L2/H2)/2が満たされている、膜担体。 - 請求項1に記載の膜担体において、
以下の工程を含む方法によって算出される前記突起部の前記第1領域における前記外縁の少なくとも一部分の算術平均粗さRa1又は以下の工程を含む方法によって算出される前記突起部の前記第2領域における前記外縁の少なくとも一部分の算術平均粗さRa2が0.020μm以上1.000μm以下である、膜担体。
(工程1)前記外縁の前記少なくとも一部分のプロファイルを抽出すること
(工程2)前記プロファイルの始点及び終点が前記プロファイルのフィッティング曲線と重なるように前記プロファイルをトレンド除去すること
(工程3)トレンド除去されたプロファイルに対して、JIS B0601:2013に規定されるカットオフ値λsを適用せずに、JIS B0601:2013に規定されるカットオフ値λcにつき1μmを適用して、Ra1又はRa2を算出すること - 請求項1又は2に記載の膜担体において、
以下の工程を含む方法によって算出される前記突起部の前記第1領域における前記外縁の少なくとも一部分の二乗平均平方根粗さRq1又は以下の工程を含む方法によって算出される前記突起部の前記第2領域における前記外縁の少なくとも一部分の二乗平均平方根粗さRq2が0.030μm以上1.000μm以下である、膜担体。
(工程1)前記外縁の前記少なくとも一部分のプロファイルを抽出すること
(工程2)前記プロファイルの始点及び終点が前記プロファイルのフィッティング曲線と重なるように前記プロファイルをトレンド除去すること
(工程3)トレンド除去されたプロファイルに対して、JIS B0601:2013に規定されるカットオフ値λsを適用せずに、JIS B0601:2013に規定されるカットオフ値λcにつき1μmを適用して、Rq1又はRq2を算出すること - 請求項1から3までのいずれか一項に記載の膜担体において、
前記第1面は、規則的に、又は、並進対称的に並んでおり、前記突起部を含む複数の突起部を有する、膜担体。 - 請求項4に記載の膜担体において、
隣り合う突起部の間における前記第1面の表面粗さは、前記突起部の表面の表面粗さより小さい、膜担体。 - 請求項4又は5に記載の膜担体において、
隣り合う突起部の最近接距離は、0以上500μm以下である、膜担体。 - 請求項1から6までのいずれか一項に記載の膜担体において、
前記突起部は、熱可塑性樹脂を含む、膜担体。 - 請求項1から7までのいずれか一項に記載の膜担体において、
前記突起部には、界面活性剤が付着している、膜担体。 - 請求項1から8までのいずれか一項に記載の膜担体において、
前記高さH1及び前記高さH2のそれぞれは、5μm以上1000μm以下である、膜担体。 - 請求項1から9までのいずれか一項に記載の膜担体を備える検査キット。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202080030723.XA CN113728234A (zh) | 2019-04-24 | 2020-02-05 | 膜载体和检测试剂盒 |
KR1020217034095A KR102553911B1 (ko) | 2019-04-24 | 2020-02-05 | 막 담체 및 검사 키트 |
US17/605,478 US20220219164A1 (en) | 2019-04-24 | 2020-02-05 | Membrane carrier and test kit |
EP20794986.8A EP3961220A4 (en) | 2019-04-24 | 2020-02-05 | FILM CARRIER AND TEST KIT |
JP2021515803A JP7473536B2 (ja) | 2019-04-24 | 2020-02-05 | 膜担体及び検査キット |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019-083155 | 2019-04-24 | ||
JP2019083155 | 2019-04-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020217635A1 true WO2020217635A1 (ja) | 2020-10-29 |
Family
ID=72942402
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2020/004282 WO2020217635A1 (ja) | 2019-04-24 | 2020-02-05 | 膜担体及び検査キット |
Country Status (6)
Country | Link |
---|---|
US (1) | US20220219164A1 (ja) |
EP (1) | EP3961220A4 (ja) |
JP (1) | JP7473536B2 (ja) |
KR (1) | KR102553911B1 (ja) |
CN (1) | CN113728234A (ja) |
WO (1) | WO2020217635A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022203025A1 (ja) * | 2021-03-26 | 2022-09-29 | デンカ株式会社 | 検査デバイス及び検査方法 |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04506117A (ja) * | 1990-03-12 | 1992-10-22 | バイオサイト・ダイアグノスティックス・インコーポレイテッド | 生物学的検定装置及びそれを用いた検定方法 |
JP2010256161A (ja) * | 2009-04-24 | 2010-11-11 | Konica Minolta Holdings Inc | プラズモン励起センサおよびそれを用いたアッセイ法 |
US20110284110A1 (en) | 2010-05-24 | 2011-11-24 | Web Industries Inc. | Microfluidic surfaces and devices |
JP2013113633A (ja) | 2011-11-25 | 2013-06-10 | Nanbu Plastics Co Ltd | ストリップ |
JP2014062820A (ja) | 2012-09-21 | 2014-04-10 | Toyo Roshi Kaisha Ltd | イムノクロマトグラフ試験ストリップ用メンブレン、試験ストリップ及び検査方法 |
JP2014510925A (ja) * | 2011-04-06 | 2014-05-01 | オーソ−クリニカル・ダイアグノスティックス・インコーポレイテッド | 菱形の突起部を有するアッセイ装置 |
JP2015049161A (ja) * | 2013-09-02 | 2015-03-16 | 住友ベークライト株式会社 | バイオチップ |
JP5799395B2 (ja) | 2011-07-28 | 2015-10-28 | 富山県 | 血液中の浮遊癌細胞を捕捉できるマイクロチップ |
WO2016098740A1 (ja) | 2014-12-15 | 2016-06-23 | デンカ株式会社 | 液体試料検査キット用膜担体、液体試料検査キット、及び液体試料検査キットの作製方法 |
WO2018181549A1 (ja) * | 2017-03-28 | 2018-10-04 | デンカ株式会社 | 膜担体、並びにそれを用いた液体試料検査キット及びその製造方法 |
WO2018181540A1 (ja) * | 2017-03-28 | 2018-10-04 | デンカ株式会社 | 膜担体及びそれを用いた液体試料検査キット |
JP2019083155A (ja) | 2017-10-31 | 2019-05-30 | 矢崎総業株式会社 | 端子付き電線の製造方法及び製造システム |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2527817B1 (en) * | 2008-06-13 | 2015-07-01 | Shiseido Company, Ltd. | Skin substitute membrane, mold, and method of evaluating external preparation for skin |
JP6238877B2 (ja) | 2014-11-21 | 2017-11-29 | 三菱電機株式会社 | 扇風機の制御装置、及び扇風機 |
JP6812853B2 (ja) * | 2017-03-09 | 2021-01-13 | 大日本印刷株式会社 | 転写シート、該転写シートを用いた加飾成形品の製造方法、及び該転写シートの成形用型 |
WO2018199168A1 (ja) * | 2017-04-25 | 2018-11-01 | デンカ株式会社 | 膜担体及びその製造方法並びに液体試料検査キット |
CN108273575B (zh) * | 2018-02-26 | 2020-05-22 | 北京华科泰生物技术股份有限公司 | 一种用于诊断贫血性疾病的联合检测微流控芯片及其制备方法和用途 |
CN112740040A (zh) * | 2018-09-25 | 2021-04-30 | 电化株式会社 | 检验试剂盒用膜载体及检验试剂盒 |
-
2020
- 2020-02-05 EP EP20794986.8A patent/EP3961220A4/en active Pending
- 2020-02-05 US US17/605,478 patent/US20220219164A1/en active Pending
- 2020-02-05 KR KR1020217034095A patent/KR102553911B1/ko active IP Right Grant
- 2020-02-05 WO PCT/JP2020/004282 patent/WO2020217635A1/ja unknown
- 2020-02-05 CN CN202080030723.XA patent/CN113728234A/zh active Pending
- 2020-02-05 JP JP2021515803A patent/JP7473536B2/ja active Active
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04506117A (ja) * | 1990-03-12 | 1992-10-22 | バイオサイト・ダイアグノスティックス・インコーポレイテッド | 生物学的検定装置及びそれを用いた検定方法 |
JP2010256161A (ja) * | 2009-04-24 | 2010-11-11 | Konica Minolta Holdings Inc | プラズモン励起センサおよびそれを用いたアッセイ法 |
US20110284110A1 (en) | 2010-05-24 | 2011-11-24 | Web Industries Inc. | Microfluidic surfaces and devices |
JP2014510925A (ja) * | 2011-04-06 | 2014-05-01 | オーソ−クリニカル・ダイアグノスティックス・インコーポレイテッド | 菱形の突起部を有するアッセイ装置 |
JP5799395B2 (ja) | 2011-07-28 | 2015-10-28 | 富山県 | 血液中の浮遊癌細胞を捕捉できるマイクロチップ |
JP2013113633A (ja) | 2011-11-25 | 2013-06-10 | Nanbu Plastics Co Ltd | ストリップ |
JP2014062820A (ja) | 2012-09-21 | 2014-04-10 | Toyo Roshi Kaisha Ltd | イムノクロマトグラフ試験ストリップ用メンブレン、試験ストリップ及び検査方法 |
JP2015049161A (ja) * | 2013-09-02 | 2015-03-16 | 住友ベークライト株式会社 | バイオチップ |
WO2016098740A1 (ja) | 2014-12-15 | 2016-06-23 | デンカ株式会社 | 液体試料検査キット用膜担体、液体試料検査キット、及び液体試料検査キットの作製方法 |
WO2018181549A1 (ja) * | 2017-03-28 | 2018-10-04 | デンカ株式会社 | 膜担体、並びにそれを用いた液体試料検査キット及びその製造方法 |
WO2018181540A1 (ja) * | 2017-03-28 | 2018-10-04 | デンカ株式会社 | 膜担体及びそれを用いた液体試料検査キット |
JP2019083155A (ja) | 2017-10-31 | 2019-05-30 | 矢崎総業株式会社 | 端子付き電線の製造方法及び製造システム |
Non-Patent Citations (1)
Title |
---|
See also references of EP3961220A4 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022203025A1 (ja) * | 2021-03-26 | 2022-09-29 | デンカ株式会社 | 検査デバイス及び検査方法 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2020217635A1 (ja) | 2020-10-29 |
KR102553911B1 (ko) | 2023-07-10 |
CN113728234A (zh) | 2021-11-30 |
EP3961220A4 (en) | 2022-06-15 |
JP7473536B2 (ja) | 2024-04-23 |
EP3961220A1 (en) | 2022-03-02 |
KR20210142702A (ko) | 2021-11-25 |
US20220219164A1 (en) | 2022-07-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP7069125B2 (ja) | 膜担体及びそれを用いた液体試料検査キット | |
JP2024051162A (ja) | 検査キット用膜担体および検査キット | |
WO2017217406A1 (ja) | 液体試料検査キット用膜担体、液体試料検査キット及び液体試料検査キットの製造方法 | |
JP7306998B2 (ja) | 液体試料検査キット用膜担体、液体試料検査キット、液体試料検査キットの製造方法、液体試料の検査方法及び膜担体 | |
WO2018181549A1 (ja) | 膜担体、並びにそれを用いた液体試料検査キット及びその製造方法 | |
Yokota et al. | Extracellular vesicles nanoarray technology: Immobilization of individual extracellular vesicles on nanopatterned polyethylene glycol-lipid conjugate brushes | |
WO2020217635A1 (ja) | 膜担体及び検査キット | |
WO2020230572A1 (ja) | 膜担体及び検査キット | |
JP7267381B2 (ja) | 液体試料検査キット用膜担体、液体試料検査キット及び膜担体 | |
WO2022203025A1 (ja) | 検査デバイス及び検査方法 | |
JP2024030302A (ja) | 対象物質の測定方法、及び対象物質測定システム |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 20794986 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2021515803 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 20217034095 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2020794986 Country of ref document: EP Effective date: 20211124 |