WO2012022119A1 - 一种多重检测免疫层析芯片 - Google Patents
一种多重检测免疫层析芯片 Download PDFInfo
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- WO2012022119A1 WO2012022119A1 PCT/CN2011/001376 CN2011001376W WO2012022119A1 WO 2012022119 A1 WO2012022119 A1 WO 2012022119A1 CN 2011001376 W CN2011001376 W CN 2011001376W WO 2012022119 A1 WO2012022119 A1 WO 2012022119A1
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- detection
- solid phase
- conjugate
- pad
- quality control
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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
- G01N33/5302—Apparatus specially adapted for immunological test procedures
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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
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
Definitions
- the invention belongs to the technical field of immunodiagnosis, and relates to a multi-detection immunochromatography chip, which organically combines the immunolayering technology with the chip technology, and can simultaneously detect a plurality of target objects in a sample. Background technique
- Immunochromatography is a mature on-site rapid detection technology whose physical structure includes the following parts: adhesive backing [a], sample pad [b], bonding pad [c], analytical film [d], and absorbent pad [e], wherein the conjugate (f) of the tracer-bioactive molecule is immobilized in the binding pad, and different kinds of biomolecules are immobilized on the analysis membrane as the detection band [g] and the control band [h].
- the sample pad [b], the bonding pad [c], the analysis film [d], and the absorbent pad [e] are fixed to the adhesive backing [a] according to a certain overlapping relationship, thereby ensuring continuity of liquid flow inside the chromatography test paper. .
- the operator only needs to add a liquid sample to the sample pad [b], and the sample penetrates into the bonding pad [c] to re-dissolve the fixed conjugate [f] therein, and in the absorbent pad [e] and Driven by the capillary action, the belt [g] and the quality control belt [h] are moved in the direction of the absorbent pad.
- the detection zone [g] and A specific immune response occurs on the control band [h], resulting in a detectable signal [j].
- the chip technology is produced in response to the need for high-throughput detection of the target (nucleic acid or protein) by bioanalysis, which fixes the nucleic acid or protein as a detection probe to different regions of the glass substrate [k] by a spotter. Relatively separate detection matrices, each region in the matrix corresponds to the detection of a target.
- the sample is directly added to the detection matrix area of the chip, and after incubation (making nucleic acid hybridization or immune reaction occurs), washing, tracing, etc., a detectable signal is generated on the chip according to the presence or absence of the target in a specific area. [j].
- the homogeneous reaction with immunochromatography is different in one step.
- the chip technology, especially the protein chip technology is heterogeneous.
- the invention aims to disclose a multiplex detection immunochromatography chip, which can overcome the shortcomings of the prior art, the immunochromatography technology can not be high-throughput detection and the complicated operation of the chip technology can not be used in the field, by adopting the immunochromatographic reaction mode and The chip detection matrix is organically integrated, and finally realizes high-throughput detection based on the simple operation in the field, that is, simultaneous sampling of multiple target objects can be detected by one sample loading.
- the object of the present invention is achieved by the following scheme.
- the structural composition of the immunochromatographic chip of the invention is:
- the adhesive backing [1] is a hard material coated with pressure sensitive adhesive on one side: PVC board.
- the sample pad [2] is a substance having a large bed volume and a uniform microstructure: absorbent paper, cellulose film, glass fiber, non-woven fabric or blood filter film.
- the bonding pad [3] is a material having a larger bed volume and a uniform microstructure: glass fiber, polyester film or non-woven fabric; a plurality of detection conjugates [6] and a kind are fixed in the bonding pad [3]
- the quality control conjugate [7]; the detection conjugate [6] is formed by the combination of the tracer [8] and the liquid phase detection probe [9], and corresponds one-to-one with the specificity of the target [10] to be examined;
- the control conjugate [7] is formed by the combination of the tracer [8] and the liquid phase control probe [11], which can control whether the chromatographic process is normal or not.
- the analysis membrane [4] is a substance with a microscopic structure: a nitrocellulose membrane or a nylon membrane; an analysis membrane unit [4] is provided with a detection matrix unit [12]; each detection matrix unit [12] includes a detection Region [13] and a quality control region [14]; detection region [13] consists of a variety of solid phase detection probes [15], and the quality control region [14] consists of a solid phase quality control probe [16]
- the position of each solid phase detection probe [15] in the detection zone [13] is clearly fixed corresponding to the specific detection of one of the tested targets [10], while the solid phase quality control in the quality control zone [14]
- the position of the needle [16] is clearly fixed for quality control of whether the entire chromatography process is normal.
- the absorbent pad [5] is a substance having a large bed volume: absorbent paper or cellulose film.
- each test target [10] corresponds to two detection probes, one is fixed as a solid phase detection probe [15] on the analysis membrane [4], and one is used as a liquid phase detection probe [9] and a tracer. [8] The combination becomes fixed at the knot Test the conjugate [6] in the pad [3].
- the position of the solid phase detection probe [15] in the detection zone [13] on the analysis membrane [4] is clearly fixed, corresponding to the specific detection of each of the tested targets [10], and the target to be examined [10] And detecting a specific immune reaction between the liquid phase detection probes [9] in the conjugate [6], and changing the tracer bound at the well-defined position of the solid phase detection probe [15] by the immune reaction [8]
- the amount, the presence or absence and concentration of the target [10] is revealed by the change in the amount of the tracer [8].
- the solid phase quality control probe [16] is clearly fixed in the quality control area [14] on the analysis membrane [4], and can be combined with the quality control probe [7] in the liquid phase quality control probe [11]. Direct combination, so that the quality control chromatography process is normal or not.
- the immunochromatographic chip of the invention comprises a sandwich mode immunochromatographic chip, an indirect mode immunochromatographic chip and a competitive mode immunochromatographic chip; wherein the sandwich mode immunochromatographic chip comprises a double antibody sandwich mode detection antigen and a double antigen sandwich mode detection Two kinds of antibodies; the indirect mode is to detect a specific antibody in a serum sample, the conjugate is a tracer and a secondary antibody of the test antibody; the competition mode is used for a small molecule such as a hapten having only one antigenic determinant The substance is tested.
- the preparation method of the immunochromatographic chip of the invention is:
- binding pad [3] The control conjugate [7] and the detection conjugate [6] are mixed to obtain a conjugate mixture, and the conjugate mixture is applied to the glass fiber and polyester as the bonding pad [3]. On the film or non-woven fabric, dry for use;
- Analytical membrane [4] preparation The antigen and antibody as the solid phase detection probe [15] and the solid phase quality control probe [16] are spotted on the nitrocellulose membrane or nylon membrane in the form of round spots, each The positions of the probes are clearly fixed and can be accurately addressed, respectively forming the detection area [13] and the quality control area [14], thereby forming a detection matrix unit [12]; in each detection matrix unit [12], solid phase detection
- the needle [15] and its defined fixed position correspond to the target [10]
- the solid phase quality control probe [16] requires only one type and also has a fixed fixed position; continuous spraying on the analysis membrane [4] Several detection matrix units [12], drying ones; (see Figure 3)
- the immunochromatographic chip of the present invention is bonded and sheared: the sample pad [2], the bonding pad [3], the analytical film [4] and the absorbent pad [5] are sequentially pasted as an adhesive backing [1].
- the dividing point between the self-detecting matrix unit [12] [17] cuts the immunochromatographic chip of the present invention into a separately usable finished product, and obtains the immunochromatographic chip of the present invention;
- the shaped immunochromatographic chip can be used directly or placed in a plastic housing. (See Figure 4)
- a method for detecting a biological target using the immunochromatographic chip of the invention A. Adding a sample: dropping a liquid sample or a pretreated liquid sample onto the sample pad [2] of the immunochromatographic chip of the present invention;
- the detection principle of the immunochromatographic chip of the present invention is as follows: as shown in FIG. 5, after the liquid sample is added to the sample pad [2] in the detection, the liquid sample penetrates into the bonding pad [3] from the sample pad [2]; Under the action of the liquid sample matrix, the immobilized detection conjugate [6] and the quality control conjugate [7] in the binding pad [3] will be re-dissolved freely, and will be separated from the test target [10] in the sample.
- an immunochromatographic chip is designed by organically merging the immunochromatographic reaction mode with the chip detection matrix, and finally realizes the high premise of simple operation on site. Flux detection, that is, simultaneous sampling to achieve simultaneous detection of multiple target analytes.
- FIG. 1 Structure of the immunochromatographic chip
- Liquid phase detection Probe 10, target to be tested, 11, liquid phase quality control probe, 12, detection matrix unit, 13, detection area, 14, quality control area, 15, solid phase detection probe, 16, solid phase quality control Needle
- FIG. 3 Schematic diagram of the preparation of the analytical membrane
- FIG. 4 Schematic diagram of immunochromatographic chip sticking and shearing
- FIG. 1 Schematic diagram of immunochromatographic chip detection
- FIG. 7 Schematic diagram of double antigen sandwich mode immunochromatography chip detection
- Bl adhesive backing, B2, sample pad, B3, bond pad, B4, analytical film, B5, absorbent pad, B6, detection conjugate, B7, quality control conjugate, B8, tracer, B9, goat anti-human IgG, B10, human antibody, B11, goat anti-rabbit IgG, B12, detection matrix unit, B13, detection zone, B14, QC, B15, solid phase detection antigen, B16, solid phase control antibody
- FIG. 9 Schematic diagram of indirect mode immunochromatography chip detection
- B6 detection of conjugate, B7, quality control conjugate, B8, tracer, B9, goat anti-human IgG, B10, human antibody, B11, goat anti-rabbit IgG, B15, solid phase detection antigen, B16, solid Phase control antibody
- FIG. 11 Schematic diagram of the competitive mode immunochromatographic chip detection.
- AA influenza virus antibody detection, AB, parainfluenza antibody detection, AC, respiratory syncytial virus antibody detection, AD, Mycoplasma pneumoniae antibody detection, AE, Chlamydia pneumoniae antibody detection, AF, Legionella pneumophila antibody detection, AG, influenza Haemophilus antibody detection, AH, Klebsiella pneumoniae antibody detection, X , ELISA OD value, y, immunochromatographic chip determination of T/C value
- BA influenza virus antibody detection, BB, parainfluenza antibody detection, BC, respiratory syncytial virus antibody detection, BD, Mycoplasma pneumoniae antibody detection, BE, Chlamydia pneumoniae antibody detection, BF, hobby Legionella antibody detection, BG, Haemophilus influenzae antibody detection, BH, Klebsiella pneumoniae antibody detection, x, ELISA determination of OD value;; Immunochromatographic chip determination of T/C value
- CA opium detection, CB, morphine test, CC, heroin test, CD, cocaine test, CE, coca leaf test, CF, amphetamine test, CG, gemcitabine test, CH, mescaline test , ⁇ , concentration (ng/ml), y, immunochromatographic chip to determine T / C value.
- Influenza virus parainfluenza virus, respiratory syncytial virus, Mycoplasma pneumoniae, Chlamydia pneumoniae, Legionella pneumophila, Haemophilus influenzae, Klebsiella pneumoniae antibodies in blood using immunochromatographic chips based on double antigen sandwich mode Detection, to quickly identify the cause of fever in patients with fever.
- binding pad [A3]: Influenza virus surface antigen A, parainfluenza virus surface antigen A, respiratory syncytial virus surface antigen VIII, Mycoplasma pneumoniae surface antigen A, Chlamydia pneumoniae surface antigen A, Legionella pneumophila surface antigen A Haemophilus influenzae surface antigen A and K. pneumoniae surface antigen A were combined with fluorescein Cy5 to prepare 8 detection conjugates [A6]; digoxin was combined with Cy5 to prepare quality control conjugate [A7] ; control the conjugate [A7] and detect the conjugate [A6] in PB buffer
- Detection performance evaluation Immune layer with samples of clinical influenza virus, parainfluenza virus, respiratory syncytial virus, Mycoplasma pneumoniae, Chlamydia pneumoniae, Legionella pneumophila, Haemophilus influenzae, Klebsiella pneumoniae antibody positive or negative
- the detection performance of the chip was evaluated.
- the chip can accurately distinguish between positive and negative clinical samples, and the sensitivity is the same as the ELISA.
- influenza virus parainfluenza virus, respiratory syncytial virus, Mycoplasma pneumoniae, Chlamydia pneumoniae, Legionella pneumophila, Haemophilus influenzae, Klebsiella pneumoniae antibodies in blood using an indirect-mode immunochromatographic chip, To quickly identify the cause of fever in patients with fever.
- A. Add sample: Mix ⁇ serum sample with 900 ⁇ 1 sample dilution ( ⁇ ⁇ 7. 2 0. 03 ⁇ PB with 0.5% PEG20000, 0.05% SDS, 2% BSA), and mix the ⁇ mixed liquid The sample is added dropwise to the sample pad [ ⁇ 2] of the immunochromatographic chip;
- Detection performance evaluation Immune layer with clinical influenza virus, parainfluenza virus, respiratory syncytial virus, Mycoplasma pneumoniae, Chlamydia pneumoniae, Legionella pneumophila, Haemophilus influenzae, Klebsiella pneumoniae antibody positive or negative
- the detection performance of the chip was evaluated.
- the chip can accurately distinguish between positive and negative clinical samples, and the sensitivity is the same as the ELISA.
- Detection of illicit drugs in urine using a competitive-based immunochromatographic chip including crow, morphine, heroin, cocaine, cocaine, amphetamine, methamphetamine, and mescaline.
- Analytical membrane [C4] preparation opioid monoclonal antibody, morphine monoclonal antibody, heroin monoclonal antibody, cocaine monoclonal antibody, cocaine monoclonal antibody, amphetamine monoclonal antibody, methotrexate Mmg/ml, 9 kinds of bioactive molecules are used as a solid phase detection antibody [C15], and 9 kinds of bioactive molecules are 0. lmg/ml. , a 15 ⁇ l/dot circular spot form forms a 2. 5 cm X 3 cm detection matrix unit [C12] on a 2.
- the double antigen sandwich mode immunochromatographic chip is used for detecting a specific antibody in a serum sample, and the detection conjugate is formed by linking a tracer to a specific antigen of the test antibody.
- the structural composition of the double antigen sandwich mode immunochromatographic chip (Fig. 6) is:
- the double antigen sandwich mode immunochromatographic chip consists of a viscous underlay [Al], a sample pad [A2], a binding pad [A3], an analytical membrane [A4], and an absorbent pad [A5];
- Adhesive backing [A1] is a hard material coated with pressure sensitive adhesive on one side: PVC board, which can make sample pad [A2], bonding pad [A3], analytical film [A4] and absorbent pad [A5] as appropriate.
- the overlapping relationship is fixed and fixed to ensure continuity of liquid flow inside the double antigen sandwich mode chromatography chip;
- the sample pad [A2] is an absorbent paper which is a position where a liquid sample is added during use of the double antigen sandwich mode immunochromatographic chip;
- the binding pad [A3] is a glass fiber; the binding pad [A3] is immobilized with several detection conjugates [A6] and a quality control conjugate [A7]; the detection conjugate [A6] is composed of a tracer [A8] and The liquid phase detection antigen [A9] is ligated and has a one-to-one correspondence with the specificity of the test antibody [A10]; the quality control conjugate [A7] is composed of the tracer [A8] and the liquid phase control antigen [Al 1] Connected to form a quality control chromatographic process that is normal or not;
- the analysis membrane [A4] is a nitrocellulose membrane; wherein the analysis membrane [A4] is provided with a detection matrix unit [A12]; each detection matrix unit [A12] includes a detection zone [A13] and a quality control zone [ A14]; detection zone [A13] consists of a variety of solid phase detection antigens [A15], the quality control zone [A14] consists of a solid phase control antibody [A16]; each solid phase in the detection zone [A13]
- the position of the detection antigen [A15] is clearly fixed corresponding to the specific detection of a test antibody [A10], and the position of the solid phase control antibody [A16] in the quality control region [A14] is clearly fixed for quality control of the entire chromatography. Whether the process is normal;
- the absorbent pad [A5] is absorbent paper.
- the preparation method of the double antigen sandwich mode immunochromatographic chip is:
- binding pad [A3] The quality control conjugate [A7] and the detection conjugate [A6] were mixed to obtain a conjugate mixture, and the conjugate mixture was applied to the glass fiber as the bonding pad [A3], and baked. Dry standby
- Analytical membrane [A4] preparation The solid phase detection antigen [A15] and the solid phase control antibody [A16] were spotted on the nitrocellulose membrane in the form of round spots, and the position of each antigen and antibody was clearly fixed. Addressing, respectively forming a detection area [A13] and a quality control area [A14], thereby forming a detection matrix unit [A12]; in each detection matrix unit [A12], the solid phase detection antigen [A15] and its clear fixed position
- the solid phase control antibody [A16] requires only one type and also has a fixed fixed position; on the analysis membrane [A4], a continuous number of detection matrix units [A12], Drying standby
- the immunochromatographic chip of the present invention is affixed and sheared: the sample pad [A2], the bonding pad [A3], the analytical film [A4] and the absorbent pad [A5] are sequentially attached to the adhesive backing [A1].
- the sample pad [A2], the bonding pad [A3], the analytical film [A4] and the absorbent pad [A5] are sequentially attached to the adhesive backing [A1].
- the dividing point between the self-detecting matrix unit [A12] [17] cuts the immunochromatographic chip of the present invention into a separately usable finished product, and obtains the immunochromatographic chip of the present invention;
- the shaped immunochromatographic chip can be used directly or placed in a plastic housing.
- a method for detecting a biological target using the above double antigen sandwich mode immunochromatographic chip of the present invention :
- the detection principle of the double antigen sandwich mode immunochromatographic chip of the invention (Fig. 7) is:
- the liquid sample After the liquid sample is added to the sample pad [A2] in the test, the liquid sample penetrates from the sample pad [A2] into the bonding pad [A3]; under the action of the liquid sample matrix, the binding detection conjugate fixed in the bonding pad [A3] [A6] and the quality control conjugate [A7] will be re-dissolved freely, and with the test antibody [A10] in the sample - leaving the binding pad [A3] into the analysis membrane [A4], under capillary action, through the detection zone [A13] and the control region [A14] surge toward the absorbent pad [A5]; in this process, a site-specific binding of the conjugate [A6] to the test antibody [A10] is detected while The other site of the test antibody [A10] specifically binds to the solid phase detection antigen [A15] in the detection region [A13], and the quality control conjugate [A7] will directly bind to the QC region [ The solid phase control antibody [A16] of A14] is bound; thereby
- the indirect mode immunochromatographic chip is used to detect a specific antibody in a serum sample, and the detection conjugate is formed by linking the tracer to the secondary antibody of the test antibody.
- the detection of human serum samples will be described as an example.
- the structural composition of the indirect mode immunochromatographic chip (Fig. 8) is - the indirect mode immunochromatographic chip consists of an adhesive backing [Bl], a sample pad [B2], a bonding pad [B3], an analytical film [B4], and an absorbent pad. [B5] constitute;
- the adhesive backing [B1] is a hard surface material coated with pressure sensitive adhesive on one side: PVC board, which can make sample pad [B2], bonding pad [B3], analytical film [B4] and absorbent pad [B5] as appropriate.
- PVC board which can make sample pad [B2], bonding pad [B3], analytical film [B4] and absorbent pad [B5] as appropriate.
- the overlapping relationship is fixed and fixed to ensure continuity of liquid flow inside the indirect mode chromatography chip;
- the sample pad [B2] is a cellulose film which is a position at which a liquid sample is added during use of an indirect mode immunochromatographic chip
- the binding pad [B3] is a polyester film; the binding pad [B3] is immobilized with a detection conjugate [B6] and a quality control conjugate [B7] ; the detection conjugate [B6] is composed of a tracer [B8] and The goat anti-human IgG [B9] is ligated to specifically react with the human antibody [B10]; the quality control conjugate [B7] is composed of the tracer [B8] and the goat anti-rabbit IgG [B11].
- the quality control chromatography process is normal or not;
- the analysis membrane [B4] is a nylon membrane; wherein the analysis membrane [B4] is provided with a detection matrix unit [B12]; each detection matrix unit [B12] includes a detection zone [B13] and a quality control zone [B14]
- the detection zone [B13] consists of a plurality of solid phase detection antigens [B15], and the quality control zone [B14] consists of a solid phase control antibody [B16], ie rabbit IgG; each solid in the detection zone [B13]
- the position of the phase detection antigen [B15] is clearly fixed corresponding to the specific detection of a human antibody [B10], while the position of the solid phase control antibody [B16] in the quality control region [B14] is clearly fixed for quality control. Whether the chromatographic process is normal;
- the absorbent pad [B5] is a cellulose film.
- the preparation method of the indirect mode immunochromatographic chip is:
- binding pad [B3] mixing the quality control conjugate [B7] and the detection conjugate [B6] to obtain a conjugate mixture, and applying the conjugate mixture to the polyester film as the bonding pad [B3], Drying standby
- Analytical membrane [B4] preparation The solid phase detection antigen [B15] and the solid phase control antibody [B16] were spotted on the nylon membrane in the form of round spots. The position of each antigen and antibody was clearly fixed and can be accurately addressed. , respectively forming a detection zone [B13] and a quality control zone [B] to form a detection matrix unit [B12]; in each detection matrix unit [B12], the solid phase detection antigen [B15] and its clear fixed position and The human antibody [B10] is a corresponding one, and the solid phase control antibody [B16] only needs one kind and also has a fixed fixed position; several detection matrix units [B12] are continuously sprayed on the analysis membrane [B4], and dried. Standby
- the immunochromatographic chip of the present invention is bonded and sheared: the sample pad [B2], the bonding pad [B3], analysis
- the film [B4] and the absorbent pad [B5] are sequentially pasted on the PVC board as the adhesive backing [Bl] to ensure mutual overlap relationship; the dividing point between the self-detecting matrix elements [B12] [17] will
- the immunochromatographic chip of the invention is cut into a separately usable finished product, and the immunochromatographic chip of the invention is obtained; the shaped immunochromatographic chip can be directly used or placed in a plastic outer casing.
- the detection principle of the indirect mode immunochromatographic chip of the present invention (Fig. 9) is:
- the liquid sample After the liquid sample is added to the sample pad [B2] in the test, the liquid sample penetrates into the bond pad [B3] from the sample pad [B2]; under the action of the liquid sample matrix, the fixed detection conjugate in the bond pad [B3] [B6] and the quality control conjugate [B7] will be re-dissolved freely, and with the test human antibody [B10] in the sample, leaving the binding pad [B3] into the analysis membrane [B4], under capillary action, through detection
- the region [B13] and the quality control region [B14] are in the direction of the absorbent pad [B5]; in this process, a site-specific binding of the conjugate [B6] to the test antibody [B10] is detected.
- the solid phase control antibody [B16] of the control region [B14] is a rabbit IgG-binding; thus, the solid phase detection antigen [B15] and the human antibody to be examined are clearly immobilized by analyzing the position in the detection region [B13] on the membrane [B4].
- the structural composition of the competitive mode immunochromatographic chip (Fig. 10) is:
- the competitive mode immunochromatographic chip consists of a viscous underlay [Cl], a sample pad [C2], a binding pad [C3], an analytical membrane [C4], and an absorbent pad [C5];
- Adhesive backing [C1] is a single-sided pressure-sensitive hard material: PVC board, which can make sample pad [C2], bonding pad [C3], analytical film [C4] and absorbent pad [C5] as appropriate The overlapping relationship is fixed and fixed to ensure continuity of liquid flow inside the competitive mode chromatography chip;
- the sample pad [C2] is a glass fiber that is a location where a liquid sample is added during use of a competitive mode immunochromatographic chip
- the binding pad [C3] is a nonwoven fabric; the binding pad [C3] is immobilized with several detection conjugates [C6] and one quality control conjugate [C7] ; the detection conjugate [C6] is composed of a tracer [C8] And the liquid phase detection antigen [C9] is linked and has a completely identical antigenic determinant corresponding to the specificity of the test antigen [C10]; the quality control conjugate [C7] is composed of the tracer [C8] and the ground.
- the combination of Gaoxin [C11] can control the normalization of the chromatographic process;
- the analysis membrane [C4] is a nitrocellulose membrane; wherein the analysis membrane [C4] is provided with a detection matrix unit [C12]; each detection matrix unit [C12] includes a detection zone [C13] and a quality control zone [ C14] ; detection zone [C13] consists of multiple solid phase detection antibodies [C15], the quality control zone [C14] consists of a solid phase control antibody [C16]; each solid phase in the detection zone [C13]
- the position of the detection antibody [C15] is clearly fixed corresponding to the specific detection of a test antigen [C10], and the solid phase control antibody [C16] in the QC region [C14] is clearly fixed for the position of the rabbit anti-digoxigenin. Whether the quality of the entire chromatography process is normal;
- the absorbent pad [C5] is absorbent paper.
- the preparation method of the competition mode immunochromatographic chip is:
- binding pad [C3] The control conjugate [C7] and the detection conjugate [C6] were mixed to obtain a conjugate mixture, and the conjugate mixture was applied to a nonwoven fabric as a bonding pad [C3]. Drying standby B.
- Analytical membrane [C4] preparation The solid phase detection antibody [C15] and the solid phase control antibody [C16] were spotted on the nylon membrane in the form of round spots. The position of each antibody was clearly fixed and can be accurately addressed.
- detection zone [C13] and QC zone [C14] Forming detection zone [C13] and QC zone [C14] to form a detection matrix unit [C12]; in each detection matrix unit [C12], solid phase detection antibody [C15] and its clear fixed position and antigen to be tested [C10] - a corresponding, solid phase quality control antibody [C16] only needs one and also has a fixed fixed position; several detection matrix units [C12] are continuously sprayed on the analysis membrane [C4], and dried for standby;
- the immunochromatographic chip of the present invention is bonded and cut: the sample pad [C2], the bonding pad [C3], the analysis film [C4], and the absorbent pad [C5] are sequentially attached to the adhesive backing [C1].
- the dividing point between the self-detecting matrix unit [C12] [17] cuts the immunochromatographic chip of the present invention into a separately usable finished product, and obtains the immunochromatographic chip of the present invention;
- the shaped immunochromatographic chip can be used directly or placed in a plastic housing.
- a method for detecting a biological target using the above-described competitive mode immunochromatographic chip of the present invention :
- A. Adding a sample dropping a liquid sample or a pretreated liquid sample to the sample pad [C2] of the invention immunochromatographic chip;
- the detection principle of the competitive mode immunochromatographic chip of the present invention (Fig. 11) is:
- the liquid sample After the liquid sample is added to the sample pad [C2] in the test, the liquid sample penetrates into the bond pad [C3] from the sample pad [C2] ; under the action of the liquid sample matrix, the fixed detection conjugate in the bond pad [C3] [C6] and the quality control conjugate [C7] will be re-dissolved freely, and enter the analysis membrane [C4] with the test antigen [C10] in the sample, and the test membrane [C4], under capillary action, through the detection The zone [C13] and the quality control zone [C14] surge toward the absorbent pad [C5]; in this process, the test conjugate [C6] and the test antigen [C10] are tested in a competitive manner.
- the solid phase detection antibody [C15] specifically binds in the measurement zone [C13], and the quality control conjugate [C7] directly binds to the solid phase control antibody [C16] in the control region [C14].
- the specific competitive immune response between the antibodies [C15] was detected such that a change in the binding amount of the tracer [C8] occurred at a clearly fixed position in the detection zone [C13] on the analysis membrane [C4], that is, the antigen to be tested [ C10]
- the detection of the conjugate [C6] in the absence of the occupies the entire binding site of the solid phase detection antibody [C15], thereby producing the strongest tracer [C8] signal, and when the antigen [0] is present, Competing with the detection conjugate [C6] for the solid phase detection of the binding site on the
- the solid phase control antibody [C16] which is clearly fixed in the control region [C14] on the membrane [C4] is the digoxin attached to the rabbit anti-digoxigenin and the quality control conjugate [C7] [CI 1
- the direct combination between the two shows that the tracer [C8] is bound at a clearly fixed position in the quality control zone [C14] on the analysis membrane [C4], and the presence of the tracer [C8] indicates the normalization of the chromatographic process. get on.
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013505306A JP5775565B2 (ja) | 2010-08-19 | 2011-08-18 | マルチアッセイ免疫クロマトグラフィチップ |
AU2011291356A AU2011291356B2 (en) | 2010-08-19 | 2011-08-18 | Multiassay immunochromatographic chip |
US13/635,627 US20130157380A1 (en) | 2010-08-19 | 2011-08-18 | Multiassay immunochromatographic chip |
EP11817647.8A EP2554992A4 (en) | 2010-08-19 | 2011-08-18 | IMMUNCHROMATOGRAPHIC MULTIASSAY CHIP |
Applications Claiming Priority (2)
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CN2010102577195A CN102375055A (zh) | 2010-08-19 | 2010-08-19 | 一种多重检测免疫层析芯片 |
CN201010257719.5 | 2010-08-19 |
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WO2012022119A1 true WO2012022119A1 (zh) | 2012-02-23 |
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PCT/CN2011/001376 WO2012022119A1 (zh) | 2010-08-19 | 2011-08-18 | 一种多重检测免疫层析芯片 |
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US (1) | US20130157380A1 (zh) |
EP (1) | EP2554992A4 (zh) |
JP (1) | JP5775565B2 (zh) |
CN (1) | CN102375055A (zh) |
AU (1) | AU2011291356B2 (zh) |
WO (1) | WO2012022119A1 (zh) |
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CN113281499A (zh) * | 2021-05-18 | 2021-08-20 | 厦门先明生物技术有限公司 | 一种微流控免疫分析联检装置及其使用方法 |
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JP2013525765A (ja) | 2013-06-20 |
AU2011291356B2 (en) | 2015-02-12 |
AU2011291356A1 (en) | 2012-10-11 |
CN102375055A (zh) | 2012-03-14 |
EP2554992A4 (en) | 2014-05-21 |
JP5775565B2 (ja) | 2015-09-09 |
US20130157380A1 (en) | 2013-06-20 |
EP2554992A1 (en) | 2013-02-06 |
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