WO2004070372A1 - ターゲット認識素子及びターゲット認識素子を利用したバイオセンサ - Google Patents
ターゲット認識素子及びターゲット認識素子を利用したバイオセンサ Download PDFInfo
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- WO2004070372A1 WO2004070372A1 PCT/JP2004/001228 JP2004001228W WO2004070372A1 WO 2004070372 A1 WO2004070372 A1 WO 2004070372A1 JP 2004001228 W JP2004001228 W JP 2004001228W WO 2004070372 A1 WO2004070372 A1 WO 2004070372A1
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/001—Enzyme electrodes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
- G01N33/54366—Apparatus specially adapted for solid-phase testing
- G01N33/54373—Apparatus specially adapted for solid-phase testing involving physiochemical end-point determination, e.g. wave-guides, FETS, gratings
- G01N33/5438—Electrodes
Definitions
- the present invention relates to a target recognition element that specifically binds to a substance to be measured, and a biosensor using the target recognition element.
- Biosensors include sensors such as enzyme sensors, immunosensors, and microbial sensors. They are important in many fields such as medical, food, and industrial fields for identifying substances and measuring target substances (hereinafter referred to as targets). Have been watched.
- glucose sensor that measures a blood glucose level from a glucose concentration in blood.
- the glucose sensor has an electrode and an enzyme film provided to cover the electrode.
- Glucose oxidase (GOD) is immobilized on the enzyme membrane as a receptor that specifically reacts with glucose.
- the glucose sensor glucose as shown in Reaction Formula (1) is oxidized by GOD, it is decomposed into Darukon acid and H 2 0 2.
- H 2 0 2 generated in the reaction formula (1) includes an electrode and an enzyme layer
- the solution diffuses to the surface of the electrode during this time, and is electrolyzed at the electrode as shown in reaction formula (2), and the electrons move to the electrode.
- Fig. 7 shows the principle of operation of the mediator-type biosensor. The following reaction is performed between mediator 1 ⁇ / 1, enzyme E and substrate S that reacts with enzyme E.
- the redox reaction between the oxidized enzyme Eox and the substrate S exchanges electrons to produce the reduced enzyme Ered and the product P.
- a redox reaction between the reduced enzyme Ered and the oxidized mediator Mox produces the oxidized enzyme Eox and the reduced mediator Mred.
- the redox reaction between the reduced mediator Mred and the electrode generates the oxidized mediator Mox, and the electrons move to the electrode.
- the electrons generated by this enzymatic reaction move rapidly and in large quantities from the enzyme to the electrode via the mediator.
- oxidation and reduction are repeated in the yeast E and the mediator M.
- the substrate S is oxidized and the electrons move to the electrode.However, when the substrate S is reduced and consumes the electrons, the electron is transferred from the electrode to the enzyme by the reverse cycle. I do.
- C 60 fullerene 2 which is a mediator, is immobilized on the electrode 1 through a self-assembled monolayer 3 composed of one s S— (CH 2 ) 2 —NH 2 force.
- the enzymes 4 and the C 60 fullerene 2 not bonded, the enzymes 4 are suspended in a liquid.
- Mediator type biosensor according to the literature using the C 60 fullerene 2 having excellent characteristics in terms of electron-withdrawing and electron donating.
- enzyme 4 It is suspended in the body, not connected with the C 60 fullerene 2. Therefore, the enzymes 4 and even when the redox transfer yo Li electrons to a reaction between the substrate 5 is performed, to be bonded with each enzyme 4 and Ceo fullerene 2, the electrode 1 from the C 60 fullerene 2 enzymes 4 Cannot move a large number of electrons at high speed.
- an object of the present invention is to provide a target recognition element in which a receptor is immobilized on an inclusion complex containing a mediator.
- the first invention of the present application is directed to a first host molecule having a hydrophilic group and an inclusion site, a second host molecule having a hydrophilic group and an inclusion site, and a hydrophilic group of the second host molecule.
- a receptor that reacts with the target is included by the inclusion site of the first host molecule and the inclusion site of the second host molecule, and is formed by the reaction between the target and the receptor.
- a target recognition element including a guest molecule that transmits generated charges.
- the reaction between the receptor and the target was always included by the first host molecule and the second host molecule. This can be done near the guest molecule. Therefore, the charges generated by this reaction can be moved by the guest molecules at high speed and in large amounts.
- the first and second host molecules have a hydrophilic group, the target recognition element can be handled in a solution even if the guest molecule is insoluble. Can be easily arranged.
- the second invention of the present application is the first invention, wherein the first host molecule is a first Wherein the second host molecule is a second calixarene and the guest molecule is a fullerene.
- the inclusion sites of the first and second liquor squalenes enclose the fluorene by hydrophobic interaction and ⁇ -pourt interaction, so that the water-insoluble fullerene, which is the mediator, is a special modifying group. It can be changed to water-soluble without using. Therefore, since the distribution of electrons involved in electric conduction is kept uniform, the characteristics of fullerenes, which have high electron affinity and low ionization energy, are not impaired. Therefore, a large amount of charges can be moved at high speed by fullerenes.
- the third invention of the present application provides the target recognition element according to the first invention, wherein the receptor is one or a combination of a plurality of enzymes selected from the group consisting of an enzyme, an antibody, DNA (deoxyribonucleic acid) and a peptide.
- Bio substances can be specifically captured by enzymes, antibodies, DNA or peptides.
- a fourth invention of the present application provides the target recognition element according to the first or second invention, further comprising at least one polymer film between the second host molecule and the receptor.
- the polymer film imparts flatness to the adhesive interface between the second host molecule and the receptor and does not destroy the three-dimensional structure of the receptor, the deactivation of the receptor can be prevented. Further, since the bonding area can be increased, the second host molecule and the receptor can be more strongly bonded.
- the fifth invention of the present application provides the target recognition element according to the fourth invention, wherein the polymer film includes a poly (diallyldimethylammonium) layer and a polyvinyl potassium sulfate layer.
- the sixth invention of the present application provides the target recognition element according to the first invention, further comprising a polyion complex film covering the receptor.
- the receptor is bound to a hydrophilic group of the second host molecule under conditions of pH 4 to 8 and a temperature of 15 to 45 ° G.
- Target The present invention provides a cut recognition element.
- the inactivation of the receptor can be prevented.
- the eighth invention of the present application relates to a first host molecule having a hydrophilic group and an inclusion site, a second host molecule having a hydrophilic group and an inclusion site, and an electrode to which the hydrophilic group of the first host molecule is bonded.
- a biosensor including a guest molecule that transmits electric charge generated by a reaction between the target and the receptor to the electrode.
- the receptor Since the receptor is immobilized on the second host molecule, the receptor can always react with the target near the guest molecule. Therefore, the charge generated by this reaction can be transferred from the receptor to the electrode in a large amount at high speed by the guest molecule. Furthermore, since the guest molecule is stably fixed to the electrode by being included in the first and second host molecules, a modifying group for fixing to the electrode is not required for the guest molecule. Therefore, the property of the guest molecule to transfer charges at high speed and in large amounts is not impaired. Further, since the first and second host molecules have a hydrophilic group, the biosensor can be easily removed in a solution even if the guest molecule is insoluble.
- a ninth invention of the present application provides the biosensor according to the eighth invention, further including a detection unit connected to the electrode.
- the charge transferred to the electrode can be measured by the detecting means.
- the tenth invention of the present application is the biomolecule according to the eighth invention, wherein the first host molecule is a first calixarene, the second host molecule is a second calixarene, and the guest molecule is fullerene. Provide a sensor. It has the same effect as the second invention.
- An eleventh invention of the present application provides the biosensor according to the eighth invention, wherein the receptor is one or a combination of a plurality of enzymes selected from the group consisting of an enzyme, an antibody, DNA and a peptide. It has the same effect as the third invention.
- the 12th invention of the present application is the biomolecule according to any one of the 8th to 10th inventions, further comprising at least one polymer film between the second host molecule and the receptor. Provide a sensor. It has the same effect as the fourth invention.
- a thirteenth invention of the present application provides the biosensor according to the twelveth invention, wherein the polymer film includes a poly (diallyldimethylammonium) layer and a polyvinyl sulfate salt layer. It has the same effect as the fifth invention.
- the 14th invention of the present application provides the biosensor according to the 8th invention, further comprising a polyion complex film covering the receptor. It has the same effect as the sixth invention.
- the fifteenth invention of the present application is the biosensor according to the eighth invention, wherein the receptor is bonded to a hydrophilic group of the second host molecule at a pH of 4 to 8 and a temperature of 15 to 45 ° C. I will provide a. It has the same effect as the seventh invention.
- a sixteenth invention of the present application provides a detection method for detecting a charge generated by a reaction between the target and the receptor, using the biosensor according to claim 9.
- the electric charge can be detected efficiently.
- a seventeenth invention of the present application provides the detection method according to the sixteenth invention, wherein the guest molecule is fullerene, and further comprising an excitation step of photoexciting the fullerene.
- the fullerene By irradiating light to the fullerene, the fullerene is photoexcited, so that the property of the fullerene, which has a high electron affinity and a small ionization energy, can be enhanced. Therefore, the reaction speed as a biosensor can be increased, and the reaction sensitivity can be increased.
- the eighteenth invention of the present application is the method for producing a biosensor according to claim 8, wherein the solution containing the first host molecule and the second host molecule and the solution containing the guest molecule are mixed and stirred, An inclusion complex forming step of forming an inclusion complex including the first host molecule, the second host molecule, and the guest molecule; an electrode forming step of bonding an anionic or cationic molecule to an electrode surface; An inclusion complex bonding step of bonding the electrode formed in the electrode forming step to a hydrophilic group of the first host molecule in the inclusion complex; and An inclusion complex formed in the inclusion complex formation step, wherein the inclusion complex of the first host molecule and the second inclusion molecule are included in the inclusion complex formed in the inclusion complex formation step.
- a method for producing a biosensor wherein the guest molecule is included by an inclusion site of a host molecule.
- a biosensor having the same effects as the eighth invention can be manufactured.
- the nineteenth invention of the present application is the method of the eighteenth invention, wherein in the receptor binding step, the hydrophilicity of the second host molecule is maintained at a temperature of 15 to 45 ° C.
- a method for producing a biosensor for binding a group to the receptor is provided. It has the same effect as the seventh invention.
- FIG. 1 (a) is a diagram showing a basic configuration of an electrode section of a mediator type biosensor according to the present invention
- FIG. 1 (b) is an explanatory diagram for explaining the operation of the biosensor of (a).
- FIG. 2 shows a configuration of the biosensor according to the first embodiment.
- FIG. 3 shows (a) an example of a biosensor provided with a detection section (1).
- FIG. 4 shows (a) the configuration (1) of the biosensor according to the third embodiment, and (b) the configuration (2) of the biosensor according to the third embodiment.
- FIG. 5 shows the configuration of the biosensor according to the fourth embodiment.
- FIG. 6 shows electrical characteristics of the biosensor of the first embodiment.
- FIG. 7 is an explanatory diagram for explaining the operation principle of the mediator-type biosensor.
- Figure 8 is a structure of the electrode portion of the mediator biosensor using conventional C 60 fullerene.
- FIG. 1 (a) shows the basic configuration of the electrode section of the mediator biosensor according to the present invention.
- the mediator type biosensor has an electrode 11 and a target recognition element 10 fixed to the electrode 11.
- the target recognition element 10 has an inclusion complex 13 and a receptor 15 fixed to the inclusion complex 13.
- Inclusion complex 13 is the first e It has a strike molecule 13a, a second host molecule 13b, and a guest molecule 13c.
- the first host molecule 13a has a hydrophilic group 19a and an inclusion site 21a
- the second host molecule 13b has a hydrophilic group 19b and an inclusion site 21b. are doing.
- the inclusion complex 13 is configured to include the guest molecule 13 G by the inclusion site 21 a of the first host molecule 13 a and the inclusion site 21 b of the second host molecule 13 b. They are are surrounded as a whole and a hydrophilic group 1 9 3 ⁇ Pi 1 9 b.
- the included guest molecule 13 c acts as a mediator that transfers charge from the receptor 15 to the electrode.
- the guest molecule 13c includes fullerene
- the first and second host molecules 13a and 13b include calixarene.
- the first and second host molecules 13a and 13b may be different substances.
- it is preferable that the same substance is used because the inclusion complex 13 can be easily prepared.
- the inclusion complex 13 is prepared using two substances A and B as the materials of the first and second host molecules 13a and 13b, three kinds of complexes (AA , AB, BB) are generated. Therefore, it is necessary to separate these complexes, and it becomes difficult to prepare the inclusion complex 13. On the other hand, when the same substance is used, it is not necessary to separate them, so that the preparation is easy. Furthermore, if the substance is the same, there is no need to distinguish between the substance of the first host molecule 13a on the electrode 11 side and the substance of the second host molecule 13b on the opposite side of the electrode 11, and the inclusion complex Control of immobilization of 13 is easy.
- the electrode 11 is lyion-bonded to the hydrophilic group 19a of the first host molecule 13a by electrostatic interaction.
- the bond between the electrode 11 and the inclusion complex 13 is not limited to an ionic bond, and various bonds such as a covalent bond and a coordinate bond can be considered.
- the electrode 11 may be an inactive electrode, and an electrode of Au, Ag, Pt, ITO, carbon, or the like is used. The use of carbon is preferred because it is inexpensive, easy to process, and a relatively stable electrode can be obtained.
- FIG. 1 (b) is a schematic diagram illustrating the operation of the biosensor of FIG. 1 (a).
- Target 23 is a substance that is captured by receptor 15. This biosensor operates as follows. The target 23 is captured by the receptor 15 and an oxidation-reduction reaction occurs between the target 23 and the receptor 15.
- the presence, content, and the like of the target 23 can be measured.
- FIG. 1 (b) illustrates a case where a negative charge moves, a positive charge may move.
- the receptor 15 is fixed to the inclusion complex 13 by binding the second host molecule 13b and the receptor 15. Therefore, the reaction between the receptor 15 and the target 23 can always be performed in the vicinity of the guest molecule 13 G included by the first host molecule 13 a and the second host molecule 13 b. . Therefore, the charge generated by this reaction can be transferred from the receptor 15 to the electrode 11 in large quantities at high speed by the guest molecule 13c.
- the first and second host molecules 13a and 1313 have hydrophilic groups 193 and 19b, even if the guest molecule 13G is insoluble, the target in the solution is not affected.
- the guest molecule 13c can be handled in a solution such as by measuring the sample 23. Also, for example, the target recognition elements 10 can be easily arranged on the substrate.
- FIG. 2 shows a configuration of the biosensor according to the first embodiment.
- the biosensor according to the first embodiment will be described with reference to FIGS. 1 and 2.
- a target recognition element 10 in which a receptor 15 is immobilized on an inclusion complex 13 is immobilized on an electrode 11.
- the force elix [3] arene is a structure in which three phenolic derivatives are connected in a ring at the meta position.
- the oxygen atom side of the phenol portion is composed of a hydrophilic group, and the inclusion site on the benzene ring side opposite to the phenol portion.
- the inclusion site is composed of a hydrophobic group.
- the hydrophilic group in the force lix [3] arene shown in Fig. 2 is modified by cationic quaternary amine and is positively charged.
- the electrode 11 is made of gold, and is modified by anionic anionic force rubric acid and is negatively charged. Therefore, the electrode 11 and the hydrophilic group of the calix [3] arene are bound by electrostatic interaction.
- the receptor 15 for example, lactate dehydrogenase, which is an enzyme that reacts with pyruvate in blood as a target, is used. Lactate dehydrogenase, which has an acidic isoelectric point, is negatively charged in a neutral aqueous solution, and is bound by electrostatic interaction to the hydrophilic group of pyrex [3] arene.
- the hydrophilic group of the force lix [3] arene is positively charged, and the surface of the enzyme and the surface of the electrode 11 are negatively charged.
- the surface of the enzyme and the surface of the electrode 11 may be positively charged.
- the bond between the receptor 15 and the inclusion complex 13 and the bond between the inclusion complex 13 and the electrode 11 are not electrostatic interactions but may be other bonds such as covalent bonds.
- Guest molecules 1 3 c is a mediator, for example, other than the C 60 fullerene, C 70, Li 76, 78, 82,. 84, Cs6> then 88, then 90, 92, 94,. It may be a local no-frills of 96.
- the first and second host molecules 13a and 13b have the same force elix [3] arene, but the first host molecule 13a has a force elix [4] arene.
- the second host molecule 13 b may use a different force ixarene, such as force ix [3] arene.
- lactate dehydrogenase which is an enzyme
- Other enzymes include, for example, oxidase (eg, glucose oxidase), dehydrogenase (eg, alcohol dehydrogenase), reductase (eg, adrenoidoxin), oxygenase, hydroperoxidase
- zealase for example, cod
- urease is used as an enzyme
- blood urea nitrogen BUN Blood urea nitrogen BUN (Blood Urea Nitrogen) can be measured, and when creatinine deaminase is used, creatinine can be measured, making it possible to determine kidney disease .
- the biosensor described above, wrapped against the C 60 fullerene by hydrophobic interactions and Tautau- [pi interactions inclusion site of the first and second host molecule 1 3 a, a 1 3 b potassium box [3] Aren
- the electrode 11 is stably fixed to 1.
- C 60 hula one Ren, force helix [3] are inclusion in a suspended state by Aren, Osamu Kazarimoto are not coupled. Therefore, since the distribution of the valence electrons involved in electric conduction is kept uniform, the fullerene characteristic of high electron affinity and low ionization energy is not impaired. Therefore, it is possible to move the C 60 high speed and large amount charges to fullerene and the electrode from the receptor.
- the force helix [3] the side opposite to the inclusion site of the array down is, since it is composed of a phenol of hydrophilic groups, it clathrate C 60 fullerene water insoluble force helix [3] Aren, the modifying group It can be changed to water-soluble without using it. Therefore, the biosensor can be easily handled in a solution.
- FIG. 3A and 3B show an example of a biosensor provided with a detection unit.
- the target recognition element 42 of FIG. 2 is fixed to the electrode 40, and the electrode 40 is connected to the detection unit 45.
- the sample is dropped on the electrode 40 where the target recognition element 42 is immobilized, the current is measured by the detector 45, and the current is converted into the concentration of the target in the sample.
- the tip of the electrode 40 to which the target recognition element 42 is fixed is immersed in the sample solution, and the current is measured by the detection unit 45.
- C fullerenes a wavelength wide to cause light excitation, is efficiently excited particularly for 6 2 0 nm wavelengths below As a light source having such a wavelength, a red LED or an Ar laser is used.
- the biosensor of the first embodiment is manufactured as follows. A force helix [3] ⁇ lane and C 60 fullerenes are mixed in an aqueous solution, stirring the mixture solution. It is preferable to use ultrasonic treatment for stirring. This process, C 60 fullerene is inclusion in the hydrophobic group is an inclusion site of force helix [3] Aren, the inclusion complex 13 is generated. Electrode 11, 1, Rix [3] Modify the hydrophilic group of the arene with an anionic or cationic molecule. At this time, the modification is performed so that the bond between the electrode 11 and the force lix [3] arene and the bond between the force lix [3] arene and lactate dehydrogenase are bound by electrostatic interaction.
- the modified inclusion complex 13, the electrode 11, and the lactate dehydrogenase are combined to obtain a biosensor capable of measuring pyruvate as a target.
- the lactate dehydrogenase and the inclusion complex 13 be bound at a pH of 4 to 8 and a temperature of 15 to 45 ° C., since the inactivation of the enzyme can be prevented.
- a gold electrode was immersed in an ethanol solution containing sodium 2-mercaptoethanesulfonate to prepare an electrode 11 having anionic molecules on the surface.
- the electrode prepared in the above (3) was immersed in an aqueous solution of an inclusion complex (0.25 mmo I Zdm 3 ), whereby the inclusion complexes were densely arranged on the electrode, thereby producing a biosensor. At this time, the inclusion complex was connected to the electrode by electrostatic interaction.
- the electrode was immersed at room temperature for 20 minutes to immobilize the enzyme on the inclusion complex by electrostatic interaction.
- FIG. 6 shows the electrical characteristics of the biosensor of the first embodiment obtained by the above-described manufacturing method, which were obtained by the cyclic porttammetry measurement method.
- Characteristics of a biosensor chip on which lactate dehydratase (LDH) is immobilized immersed in a mixture of 125 juM reduced nicotinamide adenine nucleotide (NADH) and 0-250 ⁇ M pyruvate FIG. A biosensor chip capable of measuring trace amounts of pyruvic acid with high sensitivity was obtained.
- LDH lactate dehydratase
- the biosensor having the configuration shown in the first embodiment in which the receptor 15 is an antibody, DNA, cell and / or peptide will be described.
- an antigen to which the receptor 15 reacts specifically can be a target, and its presence, concentration, and the like can be measured.
- Antigens include viruses, bacteria, pollen, mold, mites and the like.
- the case where the antibody is “mouse lgG” and the antigen is “protein AJ” will be described.
- Protein A is an antigen in mice, using the immune response of mice innate making “mouse igGj antibody.
- the antibody” mouse I g G "extracted, purified And immobilized on inclusion complex 13.
- the Fc part of mouse IgG is modified with a hepoxyl or diamino group.
- protein A and mouse IgG specifically bind.
- the charge generated from the protein A composed of a polar molecule reaches the electrode 11 via the antibody and the inclusion complex 13. By measuring the current flowing through the electrode 11, protein A, which is an antigen, can be quantified.
- a method for detecting the target DNA when the receptor 15 is a probe DNA that specifically reacts with the target DNA will be described.
- DNA has a double helix structure, it is used as a single strand when used as a receptor 15 of a biosensor.
- a single-stranded DNA having artificial complementarity with the nucleotide sequence of the target DNA is artificially synthesized to produce a probe DNA.
- the probe 08 is immobilized on the inclusion complex 13.
- the DNA is heated to, for example, 95 ° C. to form a single strand. If the DNA sequences of the DNA and the probe DNA are complementary, that is, if the DNA in the sample has the DNA sequence to be detected, they are combined to form a double helix structure.
- an intercalator that specifically binds to the double helix structure and serves as a charge generation source is inserted into the gap of the double helix structure.
- the presence or absence of the lini double helix structure that is, whether or not the DNA in the sample has the target base sequence is determined based on the change in the current flowing through the electrode 11.
- a method for detecting a target antigen when the receptor 15 is a cell will be described. Extract and purify immune cells such as NK cells and B cells from living organisms and immobilize them on inclusion complex 13. It is preferable to use the terminal group of the protein molecule bound to the cell surface and immobilize it on the inclusion complex 13 because it can be easily immobilized.
- Antigens include viruses, bacteria, pollen, mold, mites and the like.
- a method for detecting a target peptide when the receptor 15 is a peptide will be described.
- the phage is made to produce a probe peptide that specifically reacts with the desired target using genetic engineering techniques. Extract and purify it and immobilize it on inclusion complex 13.
- the biosensor having this inclusion complex 13 is injected into a sample, the peptide corresponding to the charge state of the side chain of the amino acid constituting the probe and the probe peptide are bound.
- the current flowing through the electrode 11 can be measured, and the target peptide of interest can be detected and quantified.
- FIGS. 4A and 4B show the configuration of the biosensor according to the third embodiment. 1 denote the same components as in the first embodiment.
- a polymer film 50 is further provided on the target recognition element 10 of FIG.
- the polymer film 50 is provided between the second host molecule 13 b and the receptor 15. Since such a polymer film 50 imparts flatness to the adhesive interface between the second host molecule 13b and the receptor 15 and does not break the three-dimensional structure of the receptor 15, Inactivation can be prevented. Further, since the adhesion area can be increased, the second host molecule 13b and the receptor 15 can be more strongly adhered. As shown in FIG.
- the polymer film 50 may be a polymer film 52, 54 having a two-layer structure.
- a cationic polymer film PDDA (poly (diallyldimethylammonium chloride)) 52 is formed on the inclusion complex 13
- an anionic polymer film PVS (polyvinyl potassium sulfate) is formed thereon.
- the enzyme is immobilized on the inclusion complex 13 by forming 54.
- the polymer film 50 may have two or more layers.
- a precursor of Ricalix [3] arene was synthesized by aminolysis using an excess of N, N-dimethylpropanediamine, starting from the triester form of Ryelix [3] arene.
- This precursor was N-methylated using dimethyl sulfate to synthesize a tertiary amine-terminated force lix [3] arene.
- the gold electrode was immersed in an ethanol solution containing sodium 2-mercaptoethanesulfonate to prepare an electrode 11 having anionic molecules on the surface.
- the electrode prepared in the above (3) was immersed in an aqueous solution of an inclusion complex (0.25 mmo I Zdm 3 ), whereby the inclusion complexes were densely arranged on the electrode, thereby producing a biosensor. At this time, the inclusion complex was connected to the electrode by electrostatic interaction.
- FIG. 5 shows a configuration of a biosensor according to the fourth embodiment. 1 denote the same components as in the first embodiment.
- a polyion complex film 56 is further provided on the target recognition element 10 of FIG.
- the polyion complex membrane 56 is provided on the receptor 15 and enhances the binding between the receptor 15 and the second host molecule 13b. Therefore, the durability of the biosensor can be improved.
- a polyion complex membrane such as cationic poly-L-lysine panionic glutamate acrylate is exemplified.
- the gold electrode was immersed in an ethanol solution containing sodium 2-mercaptoethanesulfonate to prepare an electrode 11 having anionic molecules on the surface. .
- the electrode prepared in the above (3) was immersed in an aqueous solution of an inclusion complex (0.25 mmo I Zdm 3 ), whereby the inclusion complexes were densely arranged on the electrode, thereby producing a biosensor. At this time, the inclusion complex was connected to the electrode by electrostatic interaction.
- lactate dehydrogenase 0.2 mg Zm I
- a polyion complex membrane was formed on the surface of the enzyme by casting a 1 mM solution of Poly-L-lysine using a casting method.
- a target recognition element in which a receptor is immobilized on an inclusion complex containing a mediator can be provided.
Abstract
Description
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US10/544,875 US7473549B2 (en) | 2003-02-10 | 2004-02-05 | Target recognition element and biosensor including the same |
EP04708492A EP1593960A1 (en) | 2003-02-10 | 2004-02-05 | Target recognition element and biosensor including the same |
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JP2003032106A JP3939256B2 (ja) | 2003-02-10 | 2003-02-10 | ターゲット認識素子及びターゲット認識素子を利用したバイオセンサ |
JP2003-032106 | 2003-02-10 |
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EP (1) | EP1593960A1 (ja) |
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US9005527B2 (en) | 2006-10-24 | 2015-04-14 | Bayer Healthcare Llc | Transient decay amperometry biosensors |
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JP2007003408A (ja) * | 2005-06-24 | 2007-01-11 | Kyushu Institute Of Technology | 細胞バイオセンサ |
JP2007309912A (ja) * | 2006-04-17 | 2007-11-29 | Japan Advanced Institute Of Science & Technology Hokuriku | 電気化学検出センサー及びその製造方法 |
CN102580100B (zh) * | 2011-12-19 | 2013-06-19 | 南开大学 | 一种酶调控的纳米超分子囊泡的制备方法及应用 |
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 |
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---|---|---|---|---|
WO2001096292A1 (en) * | 2000-06-10 | 2001-12-20 | The Secretary Of State For Defence | Calixarenes and calixarene-based sensors |
JP2002094146A (ja) * | 2000-09-13 | 2002-03-29 | Japan Science & Technology Corp | カリックスアレーン・フラーレン薄膜を有する光電変換素子用材料 |
JP2003031832A (ja) * | 2001-07-18 | 2003-01-31 | Japan Science & Technology Corp | フラーレンを含む薄膜から成る光電変換素子用材料 |
JP2003504622A (ja) * | 1999-07-08 | 2003-02-04 | ラジオメーター・メディカル・アクティーゼルスカブ | 親水性マトリックス材料を含んでなるセンサー |
JP2004022424A (ja) * | 2002-06-19 | 2004-01-22 | Japan Science & Technology Corp | ホスト−ゲスト錯体を含有する光電変換素子用材料 |
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WO2001036955A1 (fr) * | 1999-11-16 | 2001-05-25 | Matsushita Electric Industrial Co., Ltd. | Biodetecteur |
US6652833B2 (en) * | 2000-07-13 | 2003-11-25 | The Regents Of The University Of California | Functionalized active-nucleus complex sensor |
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JP2003504622A (ja) * | 1999-07-08 | 2003-02-04 | ラジオメーター・メディカル・アクティーゼルスカブ | 親水性マトリックス材料を含んでなるセンサー |
WO2001096292A1 (en) * | 2000-06-10 | 2001-12-20 | The Secretary Of State For Defence | Calixarenes and calixarene-based sensors |
JP2002094146A (ja) * | 2000-09-13 | 2002-03-29 | Japan Science & Technology Corp | カリックスアレーン・フラーレン薄膜を有する光電変換素子用材料 |
JP2003031832A (ja) * | 2001-07-18 | 2003-01-31 | Japan Science & Technology Corp | フラーレンを含む薄膜から成る光電変換素子用材料 |
JP2004022424A (ja) * | 2002-06-19 | 2004-01-22 | Japan Science & Technology Corp | ホスト−ゲスト錯体を含有する光電変換素子用材料 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9005527B2 (en) | 2006-10-24 | 2015-04-14 | Bayer Healthcare Llc | Transient decay amperometry biosensors |
US10190150B2 (en) | 2006-10-24 | 2019-01-29 | Ascensia Diabetes Care Holdings Ag | Determining analyte concentration from variant concentration distribution in measurable species |
US11091790B2 (en) | 2006-10-24 | 2021-08-17 | Ascensia Diabetes Care Holdings Ag | Determining analyte concentration from variant concentration distribution in measurable species |
Also Published As
Publication number | Publication date |
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EP1593960A1 (en) | 2005-11-09 |
JP3939256B2 (ja) | 2007-07-04 |
CN100451641C (zh) | 2009-01-14 |
US20060183124A1 (en) | 2006-08-17 |
CN1748141A (zh) | 2006-03-15 |
US7473549B2 (en) | 2009-01-06 |
JP2004264052A (ja) | 2004-09-24 |
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