WO2004020397A1 - ダイオキシン類の免疫測定用標準品及びダイオキシン類の免疫測定法 - Google Patents
ダイオキシン類の免疫測定用標準品及びダイオキシン類の免疫測定法 Download PDFInfo
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- WO2004020397A1 WO2004020397A1 PCT/JP2003/010394 JP0310394W WO2004020397A1 WO 2004020397 A1 WO2004020397 A1 WO 2004020397A1 JP 0310394 W JP0310394 W JP 0310394W WO 2004020397 A1 WO2004020397 A1 WO 2004020397A1
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- Prior art keywords
- immunoassay
- dioxin
- dioxins
- standard
- antibody
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
- C07K5/04—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing only normal peptide links
- C07K5/06—Dipeptides
- C07K5/06191—Dipeptides containing heteroatoms different from O, S, or N
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C235/00—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms
- C07C235/02—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton
- C07C235/04—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton the carbon skeleton being acyclic and saturated
- C07C235/18—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton the carbon skeleton being acyclic and saturated having at least one of the singly-bound oxygen atoms further bound to a carbon atom of a six-membered aromatic ring, e.g. phenoxyacetamides
- C07C235/20—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton the carbon skeleton being acyclic and saturated having at least one of the singly-bound oxygen atoms further bound to a carbon atom of a six-membered aromatic ring, e.g. phenoxyacetamides having the nitrogen atoms of the carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms
-
- 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
- G01N33/5308—Immunoassay; Biospecific binding assay; Materials therefor for analytes not provided for elsewhere, e.g. nucleic acids, uric acid, worms, mites
Definitions
- the present invention relates to a standard used for immunoassay of dioxins.
- the present invention also provides a method for immunoassay of dioxins using this standard product, and more specifically, the concentration or toxic equivalent (T EQ) of dioxins in air, exhaust gas, soil, rivers, combustion ash, etc. It relates to a method of calculating by using a dioxin analog as a standard.
- Dioxins are polychlorinated dibenzo-_-dioxins (po 1 ych 1 orinateddibe nz o-p-di ox ins: PCDD s) and polychlorinated dibenzofurans (pol yc hlorinateddibe nz ofurans: PCDF s) ), And coplanar PCB (Co-PCB s).
- PCDDs and PCDFs the isomers with chlorine substitution at positions 2, 3, 7, and 8 are highly toxic, and include dermatitis due to chlorine, polyneuropathy, and oculomotor dystrophy. It is known to cause symptoms such as liver dysfunction.
- endocrine disrupters which have the effect of disrupting endocrine functions of humans and wild animals, have been highlighted as global environmental problems.
- dioxins are also endocrine disruptors with estrogenic activity Is also known.
- Dioxins with various toxicities are contained in chemical products such as herbicides and pesticides, exhaust gas and fly ash from garbage incineration plants, and wastewater discharged from paper mills. It is clear. For this reason, dioxins have been detected in biological samples such as food, blood, breast milk, and urine, as well as in environmental samples such as water and sediment, air, and soil in rivers and ports around large cities. Since the widespread contamination of the environment has become a major social problem, it is urgently necessary to ascertain the amount of dioxin exposure in the environment.
- An immunoassay is a method for detecting or quantifying a small amount of an antigen using the ability of the antibody to specifically recognize the antigen.
- the antigen is measured with high sensitivity by the high affinity and high specificity of the antibody for the antigen can do. For this reason, sample pretreatment is simple, and the measurement of multiple samples can be performed easily and quickly, and it has various advantages such as low cost for measurement. It has many advantages such as medicine, biochemistry, pharmacy, agriculture, etc. It is used in a wide range of fields.
- it is necessary to label an antibody or an antigen, and various labeling methods have been developed.
- EIA enzyme immunoassay
- EIA the same compound as the object to be measured is used as a standard, measured in the same manner as the specimen, and the compound concentration in the sample is calculated from the obtained standard curve.
- dioxins are a generic term for isomers with three different chlorine substitutions in a group of compounds having three basic skeletons, so it is problematic which compound is used as a standard.
- dioxins Since the toxicity of dioxins varies depending on the homologue and isomer, the toxicity of dioxins, which is a mixture of homologues and isomers with different toxicity, depends on the abundance of individual isomers. Simply summing up the amounts of each isomer does not correctly represent the toxicity of dioxins.
- TEF Toxic Equivalency Factor
- TEQ Toxic Equivalent
- the EIA measurement system that mainly measures 2,3,7,8_TeCDD can accurately measure the toxicity of dioxins.
- the dioxins toxic equivalents (TEQ) in the gas emitted from waste incinerators, which are the major source of dioxins are lower than the 2,3,7,8-Te CDD in the concentration of pentachlorinated dibenzofuran.
- TEQ toxic equivalents
- the correlation is high with the concentration of hexachlorinated dibenzofuran.
- the conventional EIA measurement system may be significantly different from the instrumental analysis values. Thus, the use of the EIA measurement system may be restricted.
- An object of the present invention is to provide a standard product for immunoassay of dioxins, which does not have a toxic equivalent coefficient (TEF), and a method for measuring the concentration or toxicity of dioxins in environmental samples using this standard product.
- An object of the present invention is to provide an immunoassay method capable of measuring an equivalent amount simply and with high sensitivity.
- the present inventor has made the following findings as a result of intensive studies in view of the above circumstances.
- RR 2 , R 3 , and R 4 are the same or different and each represents a chlorine atom or a hydrogen atom; n represents an integer of 1 to 10; and Z represents an amino acid residue or a peptide.
- this Cloguchi phenol derivative does not have a Toxicity Equivalent Factor (TEF), it can be safely used as a standard for the measurement of dioxins by using this compound to safely determine the concentration of dioxins in environmental samples and the toxic equivalents. Can be calculated. -The present invention has been completed based on the above findings, and provides the following compounds.
- RR 2 R 3 R 4 are the same or different and represent a chlorine atom or a hydrogen atom, n represents an integer of 110, and Z represents an amino acid residue or a peptide.
- a standard product for immunoassay of dioxins represented by the general formula (1).
- RR 2 R 3 R 4 are the same or different and represent a chlorine atom or a hydrogen atom, n represents an integer of 110, and Z represents an amino acid residue or a peptide.
- An immunoassay kit for dioxins comprising the compound according to item 1.
- kit according to item 3 further comprising an anti-dioxin antibody.
- kit according to item 3 or 4 further comprising a competitive antigen.
- the immunoassay is a method selected from an enzyme immunoassay, a radioimmunoassay, and a fluorescence immunoassay.
- the immunoassay is a method selected from an enzyme immunoassay, a radioimmunoassay, and a fluorescence immunoassay.
- the amount of the antigen-antibody reaction in the step (1) is determined by combining the compound according to claim 1 with a known concentration with the compound. Calculating the concentration of dioxins contained in the test sample by comparing the amount of dioxins contained in the test sample with the amount of antigen-antibody reaction obtained by reacting the dioxins with the dioxin antibody.
- the antigen-antibody reaction amount is measured by a method selected from an enzyme immunoassay, a radioimmunoassay, and a fluorescence immunoassay.
- a standard product for immunoassay of dioxins which does not have a toxic equivalent coefficient (TEF), and a dioxin concentration or a toxic equivalent in an environmental sample which is easily and easily determined using this standard product.
- TEZ toxic equivalent coefficient
- An immunoassay that can be measured with high sensitivity has been provided. More specifically, the concentration of dioxins in a sample quantified using the immunoassay standard represented by the general formula (1) of the present invention and the toxic equivalent calculated from this are determined by instrumental analysis to determine the toxic equivalent coefficient. It shows good correlation with the toxic equivalent obtained by the official method for measuring the concentration of dioxin compounds.
- the toxic equivalent of a test sample can be measured accurately and with high sensitivity. From this, the toxic amount of dioxins in the test sample can be accurately evaluated as compared with the conventional EIA.
- the toxicity equivalent can be evaluated in a relatively short time.
- the standard product of the present invention is considered to be a non-toxic compound because WHO has not determined its toxic equivalent coefficient.
- the compound of the present invention is a derivative obtained by adding a methylene chain and a peptide to a commercially available compound, cloguchi phenol (for example, 2,4,5-trichloromouth phenol), and it is clear from this point that it has no toxicity. Therefore, the use of the compound of the present invention can greatly improve the safety of immunoassay for dioxins.
- the compounds and methods of the present invention can be widely applied to environmental analysis and the like, and are also useful in analyzing biological samples such as food, breast milk, blood, and urine. Detailed description of the invention Hereinafter, the present invention will be described in detail.
- the compound represented by the following general formula (1) is a novel compound not described in the literature.
- RR 2 , R 3 , and R 4 are the same or different and each represents a chlorine atom or a hydrogen atom, n represents an integer of 1 to 10, and Z represents an amino acid residue or a peptide.
- the number and position of chlorine substitution are not particularly limited, but from the viewpoint of reactivity with an anti-dioxin antibody, a compound having a total substituted chlorine number of 3 or more is preferable. Compounds having a number of 3 are more preferred.
- the amino acid residue or peptide of Z is not particularly limited as long as the number of constituent amino acid residues is within 100 residues according to the definition of ordinary peptide, but is usually about 1 to 50 residues, particularly about 1 to 10 residues. , More particularly about 1 to 4 residues, and more particularly about 1 to 3 residues. Amino acids or peptides are preferred. If the peptide is too long, its solubility in water will increase, and it will be difficult to dissolve it in an organic solvent during measurement, and precipitation may occur in the reaction solution. However, such a problem does not occur in the above range.
- R 1 R 2 represents a chlorine atom
- R 3 and R 4 represent a hydrogen atom
- n is 2 to 6, and Z is a peptide having about 1 to 4 amino acid residues
- R 2 and R 3 are chlorine atoms
- R 2 and R 4 represent a chlorine atom
- a compound in which 1 and R 3 represent a hydrogen atom, n is 2 to 6, and Z is a peptide having about 1 to 4 amino acid residues
- R 3 and R 4 represent a chlorine atom
- R 1 and R 2 represent Compounds which represent a hydrogen atom, n is 2 to 6, and Z is a peptide having about 1 to 4
- R 1 and R 4 R 2 represents a chlorine atom represent a hydrogen atom, n is 2-6, compound Z is an amino acid residues about 1 to 4 peptide;
- R 2 Compounds in which R 4 represents a chlorine atom, R 1 and R 3 represent a hydrogen atom, n is 2 to 6, and Z is a peptide having about 1 to 4 amino acid residues are preferred.
- R 2 R 1 and R 3 R 4 represents a chlorine atom represent a hydrogen atom, n is 5, compound Z is an amino acid residue numbers 1-3 of about amino acid or peptide;
- R 2 Compounds in which R 3 represents a chlorine atom, R 1 and R 4 represent a hydrogen atom, n is 2, and Z is an amino acid or a peptide having about 1 to 3 amino acid residues are preferred.
- the compound represented by the general formula (1) can be used as a standard for immunoassay of dioxins because it reacts with an anti-dioxin antibody. Furthermore, since this compound has no toxic equivalent coefficient (TEF), a dioxin immunoassay system that can be safely measured by a measurer can be constructed by using this compound as a standard product.
- TEZ toxic equivalent coefficient
- the standard product for measuring dioxins of the present invention is not limited thereto. It can be synthesized by the following method.
- R 1 R 2 , R 3 , and R 4 are the same or different and represent a chlorine atom or a hydrogen atom, and n represents an integer of 1 to 10.
- R 1 R 2 R 3 and R 4 are the same or different and each represents a chlorine atom or a hydrogen atom, and n represents an integer of 110.
- the compound represented by the general formula (1) is obtained by reacting the compound represented by the general formula (3) with a compound having an amino group such as an amino acid or a peptide according to a conventional method.
- the starting phenol derivative of the general formula (2) which is a starting material, can be synthesized, for example, by the following method. Chlorophenol, potassium carbonate and 6-bromohexanoic acid ester are heated and stirred at 60 ° C. for 16 hours. After completion of the reaction, the mixture is extracted with ethyl acetate and the solvent is concentrated under reduced pressure. The residue is dissolved in ethanol, an aqueous sodium hydroxide solution is added, and the mixture is stirred at room temperature for 3 hours. After completion of the reaction, neutralize with concentrated hydrochloric acid, concentrate the reaction mixture under reduced pressure, add concentrated hydrochloric acid to make it acidic, extract with ethyl acetate, and reconstitute. By carrying out the crystallization, a cloguchi phenol derivative represented by the above general formula (2) is obtained.
- the kit for immunoassay of dioxins of the present invention contains the compound represented by the general formula (1) of the present invention as a standard for quantifying dioxins.
- the anti-dioxin antibody may be prepared by the user or included in this kit, but it is convenient to include it in this kit. The anti-dioxin antibody will be described later.
- the sample when it is to be subjected to a competitive assay method, it may contain a competitive antigen. Competitive antigens are also described below.
- it may contain a reaction container, a blocking agent for covering the surplus surface of the container, a buffer, and in the case of a kit used for the indirect competition method, a secondary antibody and the like.
- the method of the present invention is an immunoassay for quantifying dioxins, and uses the compound represented by the general formula (1) as a standard. More specifically, the method of the present invention is an immunoassay for calculating the concentration of dioxins or a toxic equivalent in a test sample, wherein the compound represented by the general formula (1) is used as a standard. It is a method used.
- the immunoassay for dioxins of the present invention comprises the steps of: (1) measuring the amount of antigen-antibody reaction by reacting a test sample with an anti-dioxin antibody; The amount of the dioxin contained in the test sample was determined by comparing the amount of the dioxin contained in the test sample with the amount of the antigen-antibody reaction obtained by reacting the compound represented by the general formula (1) with a known concentration. And calculating (2).
- the dioxin immunoassay of the present invention is characterized in that the chlorophenol derivative represented by the above general formula (1) is used as a standard product for dioxins measurement. Can be implemented.
- the compounds of the present invention can be applied to any known immunoassay.
- known immunoassays include, for example, enzyme immunoassay (EIA), radioimmunoassay (R IA), fluorescence immunoassay (FIA) and the like. EIA is preferred for ease of measurement.
- EIA includes a competitive assay, a non-competitive assay, a homogenous assay, and the like.
- dioxins are low-molecular-weight compounds, and thus may be generally determined by a competitive assay.
- the competitive method mainly includes an indirect competitive method in which an antigen is immobilized in a microplate well or a tube, and a direct competitive method in which an antibody is immobilized in a well tube or the like.
- dioxins or a complex thereof with a carrier-protein is used as a competition antigen immobilized on a well.
- a complex with a carrier protein When using an untreated reaction vessel made of resin or glass, it is difficult to immobilize dioxins alone in the vessel, so it is preferable to use a complex with a carrier protein.
- dioxins alone When using a reaction vessel whose surface is activated with a highly reactive functional group such as an amino group or a hydroxyl group, dioxins alone may be immobilized on the vessel via these functional groups. Can be. Regardless of the presence or absence of a carrier protein, it is preferable to bind a linker to dioxins. This alleviates steric hindrance, improves the reactivity between the competitor antigen and the anti-dioxin antibody, and improves the measurement sensitivity of dioxins in the test sample.
- dioxins for example, polysalt dibenzo-para-dioxin (PCDD), polychlorinated dibenzofuran (PCDF), coplanar polybiphenyl chloride (Cobraner PCB) and the like can be used.
- PCDD polysalt dibenzo-para-dioxin
- PCDF polychlorinated dibenzofuran
- Cobraner PCB coplanar polybiphenyl chloride
- the carrier protein is not particularly limited, and a known carrier protein can be used without limitation.
- a carrier protein include KLM (Keyhole impet Hemocyanin) and serum albumin (BSA: Bovine Serum Albumin).
- a linker that does not cause steric hindrance to antibody binding For example, a polymethylene chain which does not hinder resolvability can be used.
- the linker is located between the dioxins or dioxin-like compounds or these, the carrier protein and the container.
- dioxins can be quantified with high sensitivity by using the chlorophenol derivative represented by the general formula (1) of the present invention as a competitive reaction antigen.
- the amino acid or peptide moiety bound to the terminal of the alternative standard compound represented by the general formula (1) of the present invention is changed to carrier protein such as BSA for solid phase immobilization.
- An antigen can be made.
- Antibodies used in EIA are haptenized to dioxins such as polychlorinated dibenzo-paradioxin (PCDD), polychlorinated dibenzofuran (PCDF), and coplanar polychlorinated biphenyl (cobraner PCB) according to known methods
- PCDD polychlorinated dibenzo-paradioxin
- PCDF polychlorinated dibenzofuran
- coplanar polychlorinated biphenyl cobraner PCB
- a conjugate conjugated to a carrier protein such as E. coli can be prepared as an immunizing antigen by immunizing a mammal (Kun Cae, eta 1., J. Agric Food., 25, 1207). 11209 (1977); Simona G. Merica, eta 1., Can. J. Chem., 73, 826-834 (1995)).
- the antibody may be either a polyclonal antibody or a monoclonal antibody, and is not particularly limited.
- Monoclonal antibodies are desirable because of the uniformity of the antibodies themselves and the difficulty in producing lot differences during antibody production.
- Monoclonal antibodies are antibodies obtained from single antibody-producing cells obtained by cloning a hybridoma obtained by fusing spleen cells and tumor cells of mice immunized with haptenized dioxins, but recognize dioxins. Anything should do.
- the indirect competition method may be performed, for example, as follows. First, the antigen for competition is immobilized in a well of a reaction vessel such as a microplate. Next, the portion of the well surface to which no antigen is bound is blocked with a commercially available blocking agent such as bovine serum albumin or casein. A test sample and an anti-dioxin antibody as a primary antibody are added to this well, and a test sample and a solid-phased antigen are allowed to compete with the antibody.
- a commercially available blocking agent such as bovine serum albumin or casein.
- a secondary antibody such as a goat anti-mouse immunoglobulin antibody
- an enzyme-labeled antibody labeled with an enzyme such as peroxidase (HRP) or alkaline phosphatase (ALP).
- HRP peroxidase
- ALP alkaline phosphatase
- the ratio of the decrease in the absorbance of the reaction solution due to the addition of the test sample to the absorbance of the reaction solution to which the test sample is not added is measured as the inhibition rate by the sample.
- the compound represented by the general formula (1) of the present invention was used as a standard for dioxins, and competition was conducted in the same manner except that a plurality of solutions of this standard were used in place of the test sample. Perform the reaction. By preparing a calibration curve showing the relationship between the concentration of the standard and the inhibition rate, and comparing the obtained calibration curve with the inhibition rate of the test sample, the concentration of dioxins in the test sample was converted to the standard equivalent concentration. It can be calculated as
- an anti-dioxin antibody is immobilized in a well of a container, and a portion of the well to which no antibody is bound is blocked in the same manner as described above.
- the test sample and the enzyme-labeled antigen are allowed to compete with the solid-phase antibody by adding a competitively labeled enzyme-labeled antigen and a specimen to the well.
- the enzyme-labeled antigen that has not bound to the antibody is removed by washing, and the substrate of the enzyme used for labeling is added, and the absorbance of the reaction product is measured.
- Enzyme-labeled antigens can be prepared by binding an enzyme such as peroxidase or alkylophosphatase to the same dioxins or dioxin-like compounds as the competitive antigens used in the indirect competition method.
- an enzyme such as peroxidase or alkylophosphatase
- the compound represented by the general formula (1) of the present invention in which the amino acid or peptide moiety present at the terminal is replaced with an enzyme such as peroxidase or alkaline phosphatase is used, the sensitivity is low. improves.
- labeled antigens can be obtained by labeling these compounds with isotopes.
- a labeled antigen can be obtained by binding a fluorescent substance such as rhodamine or a chemiluminescent substance to these compounds.
- test sample is not particularly limited, and may be an environmental sample collected from the environment, a biological sample, various products such as food, or a dioxin solution prepared for an experiment.
- the present invention is a method particularly suitable when an environmental sample is used as a test sample.
- Environmental samples include, for example, air; exhaust gases from automobiles, equipment, factories, etc .; soil; water from rivers, lakes, and harbors; combustion ash, fly ash, and the like.
- Biological samples include breast milk, blood, urine, and the like.
- test sample may be directly subjected to immunoassay, or a dioxin-rich fraction may be extracted from the test sample by pretreatment, but pretreatment is preferably performed.
- pretreatment methods are exemplified below, but the pretreatment methods are not limited to these.
- test gas of A (N m 3 )
- extract the substance in the gas with toluene make the volume to 20 ml, and use it as a crude extract.
- clean-up was carried out by flowing 200 ml of hexane through a multi-layered sily gel ram containing 1 g of sodium sulfate, 10 g of silver nitrate sily gel and 3 g of sily gel. Then, the solution quantified in 1 ml of DMSO is finally used for immunoassay.
- TEQ in (ng- TEQ / Nm 3) 0. 0922 X standard terms dioxins concentration (g / N m 3) ° ⁇ 8474 above formula, the value of 0.0922 and 0.8474, the exhaust gas in Examples Concentration of dioxins obtained by the method of the present invention and dioxins obtained by the official method It is a coefficient in the correlation formula between the toxic equivalent and a value determined for each test sample.
- the conversion of the unit of the dioxin concentration in terms of the standard product may be performed according to the following formula. Standard terms dioxins concentration (g / N m 3)
- Collect fly ash of B (g), extract the contained compounds with toluene, quantify to 20 ml, and use as crude extract. A 1 ml portion of the crude extract is collected, cleaned up, and finally a solution quantified in 2 ml of DMSO is provided for immunoassay. Toxic equivalents (TEQ) are calculated by substituting the obtained standard-converted dioxin concentrations into the following formula.
- TEQ (ng-TEQ / g) 0.0038X [Concentration of dioxins converted to standard (g / g)] 796
- the values of 0.0038 and 0.9796 are the dioxins obtained by the method of the present invention for fly ash in the examples. This is a coefficient in the correlation equation between the class concentration and the equivalent amount of dioxins obtained by the official method, and is a value determined for each test sample.
- the conversion of the standard dioxin concentration unit may be performed according to the following formula. Standard Dioxin Concentration (/ ig / g)
- TEQ (ng-TEQ / g) 9.4553X [standard terms dioxins concentration ( ⁇ g / g)] ° - 9352 in the above formula, resulting in the onset bright method for fly ash in the embodiment the value of 9.4553 and 0.9352
- This is a coefficient in the correlation equation between the obtained dioxin concentration and the dioxin toxicity equivalent obtained by the official method, and is a value determined for each test sample.
- the conversion of dioxin concentration units in terms of standard products may be performed in the same manner as for fly ash.
- 2,4,5-trichloromouth phenol (1) (commercially available) 15.0 g (76. Ommo 1), 6-bromohexanoic acid ethyl ester 18.6 g (83.6 mmo 1 ), Potassium carbonate (12.60 g, 91.2 mmol) and anhydrous dimethylformamide (150 ml) were mixed and heated and stirred at 60 ° C overnight. After completion of the reaction, the mixture was cooled to room temperature, the reaction solution was added to 45 Oml of water, and extracted twice with 225 ml of ethyl acetate.
- Ethyl 6- (2,4,5-trichlorophenoxy) hexanoate (2) was dissolved in 20 mL of ethanol, and 200 mL of a 2N aqueous sodium hydroxide solution was dropped under ice-cooling, The mixture was stirred at room temperature for 3 hours. After completion of the reaction, neutralize with 7 Oml of concentrated hydrochloric acid, and wash the reaction mixture. Concentrated to half. The concentrated reaction solution was acidified by adding 5 ml of concentrated hydrochloric acid, and extracted once with 100 ml of ethyl acetate and twice with 150 ml.
- the organic layer was washed with 20 Om of water and 20 Oml of a saturated aqueous sodium chloride solution in that order, and dried over magnesium sulfate.
- the drying agent was filtered off, and the organic layer was concentrated to obtain 23.3 g of a crude product as a white solid.
- the crude product was recrystallized by adding 25m1 of isopropyl ether and 5Om1 of n-hexane, and the precipitated crystals were collected by filtration, washed with 1/3 of isopropyl ether Zn-hexane, and then washed with 6- (2, 4,5-Trichlorophenoxy) hexanoic acid (3) was obtained as 21.4 g of white crystals (yield 88.0%).
- Succinimidyl-6- (2,4,5-trichlorophenoxy) hexanoate hexanoate (4) 2 Omg was dissolved in 10 Om1 of dimethylsulfoxide. Thereafter, 100 ml of a 50 mM aqueous solution of daricyldaricin was gradually added, and the mixture was stirred at room temperature for 3 hours to obtain a dioxin standard solution.
- An antigen for competition measurement was prepared using succinimidyl-6- (2,4,5-trichlorophenoxy) hexanoate hexanoate (4) prepared in Example 1 and bovine serum albumin.
- First 5 Omm phosphate buffer pH 8. 0
- BSA bovine serum albumin
- dimethyl sulfoxide 545.51 was added, followed by a solution of succinimidyl-16 (2,4,5-trichlorophenoxy) hexanoate (BB2-4) in 2OmM ditylsulfoxide 455.51 (40 equivalents (9 . 0 9X 10- 6 mo 1) ) was added dropwise and reacted for 1 hour at room temperature.
- 4? Dialysis was performed on 83 to obtain an antigen for competition measurement.
- Exhaust gas from waste incineration plants was collected according to the official method (JIS K0311), and the dioxin concentration in the sample was measured using a high-resolution gas chromatograph mass spectrometer (GC-MS). Approximately 3 Nm 3 of exhaust gas is drawn from the flue of the municipal solid waste incineration facility by suction into a gas sampling device, and the collected sample is collected in a filter paper, resin, absorbent, and other forms such as toluene and dichloromethane. Extracted using an organic solvent. These extracts were combined and concentrated to 2 Om1 to obtain a crude extract.
- JIS K0311 high-resolution gas chromatograph mass spectrometer
- the concentration of each dioxin isomer was multiplied by its toxicity equivalency factor (TEF) to calculate the dioxin toxicity equivalent (TEQ) in the exhaust gas sample.
- TEF toxicity equivalency factor
- the crude extract lm 1 separately collected was treated with sulfuric acid and subjected to multilayer silica gel chromatography. After purification by graph processing, the organic solvent was evaporated to dryness and transferred to 2 ml of dimethyl sulfoxide (DMSO) to obtain a sample for EIA evaluation.
- DMSO dimethyl sulfoxide
- the antigen for competition assay prepared in Example 2 was dissolved in PBS to 1 ⁇ g Zm1, and this solution was added to each well of a 96-well Atsey plate (Costar, Cat No. 3590). The plate was dispensed by 10 O 1 each, the plate was sealed with a seal, and the plate was allowed to stand at 4 ° C for 18 hours for solid phase immobilization. After removing the antigen solution, the plate was washed three times with PBS containing 0.05% Tween 20, and a blocking solution (manufactured by Nacalai Tesque) diluted 5 times was dispensed in 300 1 each, and the plate was sealed with a sealer. Blocking was performed by allowing the mixture to stand at CC to prepare a plate for measuring dioxins. Using this plate, immunoassay for dioxins was performed as follows.
- Example 2 With respect to the dioxin standard prepared in Example 1, a dilution series ranging from 0 to 0.2 gZm1 was prepared with 50% DMS containing 0.01% of Triton X100.
- the exhaust gas sample prepared in Example 3 was trans-dissolved in DMSO, and then diluted with 50% DMSO containing 0.01% of Triton XI 00 to prepare a measurement sample.
- a hybridoma producing an anti-dioxin monoclonal antibody was cultured in a carbon dioxide gas culture vessel at 37 ° C for 1 week or more in a serum-free medium, and a culture supernatant was obtained. After purification by affinity chromatography using column A, the mixture was dialyzed in PBS to prepare anti-dioxin monoclonal antibodies.
- Dioxin standard dilution series and exhaust gas samples were added to the dioxin measurement plate in a quantity of 50 1 each, and 0.2% contained 838?
- An anti-dioxin monoclonal solution diluted to 0.8 lg / 1 with 83 was added in 50 z portions, and reacted at 4 ° C for 1 hour. After the reaction, the solution added to the well was removed, and the plate was washed three times with PBS containing 0.005% Tween 20, and then diluted to 1: 2000 with PBS containing 0.2% BSA.
- IgG (H + L) HR P-labeled antibody (affinity-purified, DAKO) 100 1 was. After allowing the plate to stand for 1 hour at room temperature, contains 0.05% of Tween 20?
- the plate was washed three times with 8 S, and HRP substrate TMB (manufactured by BioFX) was dispensed in 1001 portions to each well, and allowed to stand at room temperature for 30 minutes.
- a 0.5 M sulfuric acid solution was added to each well in a quantity of 100 M, and the absorbance at a wavelength of 255 nm (control: 65 nm) was measured using a microtiter spectrophotometer.
- a standard curve (calibration curve) was created from the absorbance data obtained by using the dioxin standard, and the absorbance data for the exhaust gas sample was applied to the standard curve to determine the amount of dioxin in the sample as a standard. It was calculated by converting to substance concentration.
- B is the absorbance in the presence of the standard
- B. Is the absorbance in the absence of the standard.
- the dioxin toxicity equivalent obtained by quantification using GC-MS in Example 3 shows the correlation.
- the difference between the measured value of the exhaust gas sample using the immunoassay standard of the present invention by the immunoassay method and the toxic equivalent of dioxins calculated by the instrumental analysis method, which is the official method. Good correlation (R 2 0.985) was observed.
- the dioxin toxic equivalent obtained by quantification using GC-MS in Example 5 and the dioxin concentration in the sample obtained by performing an immunoassay using the standard product of the present invention in Example 6 Figure 4 shows the correlation.
- R 2 and R 4 represent a chlorine atom and RR 3 represents a hydrogen atom, and the correlation with the official method was examined.
- R 2, RR 4 R 3 represents a chlorine atom represent a hydrogen atom at 1
- RR 4 in the general formula (1) for compounds in which R 2, R 3 represents a chlorine atom represent a hydrogen atom When the same operations as those of Examples 2 to 8 were performed, a high correlation was found between the toxic equivalents of dioxins and the official method.
- FIG. 1 is a diagram showing a synthesis scheme of a standard product for immunoassay of dioxins according to Example 1.
- FIG. 2 is a diagram showing a standard curve obtained using a standard product for immunoassay of dioxins which is one example of the present invention.
- Figure 3 shows the correlation between the measured amount of dioxin toxic equivalent in exhaust gas by gas chromatography mass spectrometry and the concentration of dioxin in exhaust gas by an immunoassay using the standard product for immunoassay of dioxins of the present invention.
- Figure 4 shows the correlation between the measured amount of dioxin toxicity equivalent in fly ash by gas chromatography mass spectrometry and the concentration of dioxin in fly ash by the immunoassay using the dioxin immunoassay standard of the present invention.
- Fig. 5 is a graph showing the correlation between the measured amount of dioxin toxicity in soil by gas chromatography mass spectrometry and the concentration of dioxin in soil by an immunoassay using the dioxin immunoassay standard of the present invention. It is.
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JP2004532690A JP4476122B2 (ja) | 2002-08-29 | 2003-08-18 | ダイオキシン類の免疫測定用標準品及びダイオキシン類の免疫測定法 |
US10/525,626 US7211409B2 (en) | 2002-08-29 | 2003-08-18 | Standard compound for immunoassay for dioxin and method of immunoassay for dioxin |
EP03791222A EP1547999A4 (en) | 2002-08-29 | 2003-08-18 | IMMUNOLOGICAL ASSAY COMPOUND FOR DIOXIN AND IMMUNOLOGY ASSAY METHOD FOR DIOXIN |
AU2003262242A AU2003262242A1 (en) | 2002-08-29 | 2003-08-18 | Standard compound for immunoassay for dioxin and method of immunoassay for dioxin |
HK05109880A HK1075655A1 (en) | 2002-08-29 | 2005-11-07 | Dioxins immunoassay standard and dioxins immunoassay method |
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PCT/JP2003/010394 WO2004020397A1 (ja) | 2002-08-29 | 2003-08-18 | ダイオキシン類の免疫測定用標準品及びダイオキシン類の免疫測定法 |
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Country | Link |
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US (1) | US7211409B2 (ja) |
EP (1) | EP1547999A4 (ja) |
JP (1) | JP4476122B2 (ja) |
CN (1) | CN1315786C (ja) |
AU (1) | AU2003262242A1 (ja) |
HK (1) | HK1075655A1 (ja) |
TW (1) | TWI332492B (ja) |
WO (1) | WO2004020397A1 (ja) |
Cited By (1)
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JP2010266317A (ja) * | 2009-05-14 | 2010-11-25 | Takuma Co Ltd | ダイオキシン類の免疫測定方法 |
Families Citing this family (5)
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JP2004292367A (ja) * | 2003-03-27 | 2004-10-21 | Takuma Co Ltd | 2,4,5−トリクロロフェノキシアルキルカルボン酸およびそれを用いたダイオキシン類の測定方法 |
US8735142B2 (en) * | 2005-08-16 | 2014-05-27 | Chipotle Business Group, Inc. | Systems and methods for immunosorbent assays for single and multiple analytes |
US7767404B2 (en) * | 2005-08-16 | 2010-08-03 | Chipotle Business Group, Inc. | Apparatus and method for single-step immunosorbent assay for single and multiple analytes |
CN101482538B (zh) * | 2008-01-11 | 2013-05-15 | 财团法人生物技术开发中心 | 戴奥辛检测装置及其检测方法 |
US8877434B2 (en) * | 2012-04-19 | 2014-11-04 | Hsinyu Lee | Method and system of detecting dioxin-like compounds |
Citations (3)
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JP2002128731A (ja) | 2000-10-25 | 2002-05-09 | Fujirebio Inc | フェノキシ化合物 |
JP2002131316A (ja) | 2000-10-25 | 2002-05-09 | Fujirebio Inc | 有機塩素化合物の測定方法 |
JP2002155023A (ja) | 2000-11-22 | 2002-05-28 | Fujirebio Inc | 置換フェノキシ化合物 |
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US5145790A (en) | 1990-05-04 | 1992-09-08 | Abbott Laboratories | Reagents and method for detecting polychlorinated biphenyls |
US5538852A (en) * | 1992-10-02 | 1996-07-23 | Ecochem Research, Inc. | Immunoassay for polychlorinated biphenyls |
AU7043594A (en) * | 1993-05-28 | 1994-12-20 | Ensys Environmental Products, Inc. | A polychlorinated biphenyls (pcb) immunoassay method, its components and a kit for use in performing the same |
JP2002277467A (ja) * | 2001-03-15 | 2002-09-25 | Fujirebio Inc | 有機塩素化合物の免疫測定法 |
US20030054424A1 (en) * | 2001-04-05 | 2003-03-20 | Allen Randy L. | Rapid and sensitive method for measuring PCB contamination |
JP2004292367A (ja) * | 2003-03-27 | 2004-10-21 | Takuma Co Ltd | 2,4,5−トリクロロフェノキシアルキルカルボン酸およびそれを用いたダイオキシン類の測定方法 |
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- 2003-08-18 CN CNB038205254A patent/CN1315786C/zh not_active Expired - Fee Related
- 2003-08-18 WO PCT/JP2003/010394 patent/WO2004020397A1/ja active Application Filing
- 2003-08-18 JP JP2004532690A patent/JP4476122B2/ja not_active Expired - Fee Related
- 2003-08-18 EP EP03791222A patent/EP1547999A4/en not_active Withdrawn
- 2003-08-18 AU AU2003262242A patent/AU2003262242A1/en not_active Abandoned
- 2003-08-18 US US10/525,626 patent/US7211409B2/en not_active Expired - Fee Related
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Patent Citations (3)
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JP2002128731A (ja) | 2000-10-25 | 2002-05-09 | Fujirebio Inc | フェノキシ化合物 |
JP2002131316A (ja) | 2000-10-25 | 2002-05-09 | Fujirebio Inc | 有機塩素化合物の測定方法 |
JP2002155023A (ja) | 2000-11-22 | 2002-05-28 | Fujirebio Inc | 置換フェノキシ化合物 |
Non-Patent Citations (4)
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ARJMAND MASOOD ET AL.: "Metabolism of 2,4-dichlorophenoxyacetic acid. 8. Gasliquid chromatography of trimethylsilyl derivatives of amino acid conjugates", JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, vol. 24, no. 3, 1976, pages 574 - 580, XP002973944 * |
KELLEY MICHAEL ET AL.: "The effect of pretreatment with 2,3,7,8-tetrachlorodibenzo-p-dioxin on the hepatic metabolism of 2,4,5-trichlorophenoxy acetate (2,4,5-T) and 2,4-dichlorophenoxy acetate (2,4-D)", TOXICOLOGY AND APPLIED PHARMACOLOGY, vol. 91, no. 2, 1987, pages 295 - 298, XP002973945 * |
MITCHUM R.K. ET AL.: "Application of negative ion atmospheric pressure ionization (NIAPI) mass spectrometry for trace analysis", ADVANCES IN MASS SPECTROMETRY, no. 8B, 1980, pages 1415 - 1421, XP002973946 * |
See also references of EP1547999A4 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2010266317A (ja) * | 2009-05-14 | 2010-11-25 | Takuma Co Ltd | ダイオキシン類の免疫測定方法 |
Also Published As
Publication number | Publication date |
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AU2003262242A8 (en) | 2004-03-19 |
TW200415140A (en) | 2004-08-16 |
US7211409B2 (en) | 2007-05-01 |
US20060166296A1 (en) | 2006-07-27 |
HK1075655A1 (en) | 2005-12-23 |
TWI332492B (en) | 2010-11-01 |
CN1678568A (zh) | 2005-10-05 |
JPWO2004020397A1 (ja) | 2005-12-15 |
CN1315786C (zh) | 2007-05-16 |
AU2003262242A1 (en) | 2004-03-19 |
EP1547999A1 (en) | 2005-06-29 |
EP1547999A4 (en) | 2006-05-03 |
JP4476122B2 (ja) | 2010-06-09 |
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