CN1544469A - Anticoagulation raticide immunogen synthesis method - Google Patents

Anticoagulation raticide immunogen synthesis method Download PDF

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CN1544469A
CN1544469A CNA2003101063866A CN200310106386A CN1544469A CN 1544469 A CN1544469 A CN 1544469A CN A2003101063866 A CNA2003101063866 A CN A2003101063866A CN 200310106386 A CN200310106386 A CN 200310106386A CN 1544469 A CN1544469 A CN 1544469A
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succinate
coumarin
rodenticide
sodium hydroxide
synthetic method
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CN1233657C (en
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��˹��ŵ��
张大明
宋朝锦
鞠熀先
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Beijing Public Security Bureau Forensic Examination And Identification Center
Nanjing University
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Beijing Public Security Bureau Forensic Examination And Identification Center
Nanjing University
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Abstract

The invention discloses a process for synthesizing anticoagulant raticide immunogen for rapidly and accurately detecting anticoagulant raticide component in urine comprising the steps of, using 4-hydroxyl coumarine as haptene, obtaining coumarin-succinic ester by using esterification reaction for chemical modification, proceeding coupling through isobutyl chlorocarbonate in mixed anhydride method, purifying through glucan G50 gel column, and freeze-drying.

Description

The immunogenic synthetic method of anticoagulation class rodenticide
One, technical field
The invention belongs to biomedicine field, relate to a kind of immune analysis method, the immunogenic synthetic method of specifically a kind of anticoagulation class rodenticide.
Two, background technology
In recent years, the use rodenticide is poisoned or the incident of accidental poisoning happens occasionally, and has had a strong impact on stabilizing of society and stablizing of people's lives.Detect poisoner's urine rapidly and accurately, determining the poisonous substance title, in time to hospital rescue the provider to the qualitative foundation that provides of event property is provided, be the direction of current relevant departments research.The intoxicating phenomenon of anticoagulation class rodenticide happens occasionally at present, therefore checks anticoagulation class rodenticide (providing the result within the 10min) to have important and practical meanings accurately and rapidly.
Conventional immune analysis method mainly utilizes mark radio isotope, enzyme, fluorescent substance etc. on antibody, behind determined antigen and traget antibody specific reaction, washing plate separates, the radio isotope by measuring mark or the signal of fluorescent substance, or measure the signal that marker enzyme acts on electroactive substance that substrate produces, luminophore etc. and measure.In recent decades, immuno analytical method combines characteristics such as the sensitivity, convenience of technology such as specific recognition reaction between antigen, antibody molecule and electrochemistry, spectroscopy, acoustics, with its highly selective and high sensitivity to analyte, become clinical, biological chemistry, one of every field important analysis means such as environmental analysis.In all these methods, no matter which kind of material mark is, all need to obtain high specificity, highly sensitive monoclonal antibody, and the acquisition of monoclonal antibody needs the immunogen of high specificity.Micromolecular compound itself does not possess immunogenicity, and is therefore immunogenic synthetic most important.Immunogenic synthetic normally with micromolecular compound and bovine serum albumin BSA connection, the position of connection directly influences the specificity of monoclonal antibody.
Three, summary of the invention
The purpose of this invention is to provide a kind of immunogenic synthetic method of anticoagulation class rodenticide that can detect anticoagulation class rodenticide composition in poisoner's urine rapidly and accurately, it is in time rescued to hospital foundation is provided, give simultaneously the qualitative provider of poisoning character to.
The objective of the invention is to be achieved through the following technical solutions: the immunogenic synthetic method of a kind of anticoagulation class rodenticide is characterized in that it may further comprise the steps:
A) the Hydroxycoumarin compounds utilizes esterification to carry out chemically modified and obtains tonka bean camphor-succinate as haptens;
Hydroxycoumarin in the pyridine medium with succinyl oxide esterification formula is:
B) with steps A) tonka bean camphor-succinate of obtaining carries out coupling by the isobutyl chlorocarbonate method of mixed anhydride method;
Hydroxycoumarin and bovine serum albumin (BSA) coupling process is:
Figure A20031010638600041
C) with step B) reaction product that obtains is by dextran G50 gel column purifying, and the immunogenic binding substances of anticoagulation class rodenticide is prepared in freeze-drying.
Anticoagulation class rodenticide metabolite in vivo is mainly the Hydroxycoumarin compounds, as umbelliferone, 4 hydroxy coumarin.Consider representativeness, selecting the haptens of anticoagulation class rodenticide is 4 hydroxy coumarin, in steps A) described in the Hydroxycoumarin compounds be 4 hydroxy coumarin.
With steps A) in 4 hydroxy coumarin 1~2g in reaction flask, add succinyl oxide, in 100~120 ℃ of pyridine media, refluxed 3~5 hours, dry pyridine solution with rotatory evaporator again, chloroform extraction, chloroform layer is washed 2~4 times with vapor enrichment, and obtaining product is color of soy sauce oily body note legumin-succinate.
Step B) raw materials used bovine serum albumin Bovine Serum Albumin (BSA), Tributylamine Tri-n-butylamine, Vinyl chloroformate Ethyl Chloroformate, dioxane and the sodium hydroxide solution of comprising in.Wherein, described bovine serum albumin (BSA) is the BR level, albumin content 95%, molecular weight 67366.4; Tributylamine is a molecular weight 185.34, and CP is pure, and content is no less than 99%; Vinyl chloroformate is a molecular weight 108.53, and CP is pure, and content is no less than 96.5%; Dioxane is the AR level, vapor enrichment; Sodium hydroxide solution is 1M.The concrete operations step is:
(1), at first bovine serum albumin is dissolved in the double distilled water, transfer to pH 8.5 afterreactions with sodium hydroxide solution;
(2), then coumarin-4-succinate is dissolved in the double distilled dioxane solvent, adds Vinyl chloroformate and Tributylamine, ice bath reaction again;
(3) solution that at last (2) is obtained is slowly poured in the solution of (1) and careful the stirring, adds sodium hydroxide solution and transfers to pH 8.5, adds double distilled water, and overall agent is reacted in 5 ℃ of refrigerators.
In above operation steps, bovine serum albumin is that 0.512g, double distilled water are that 100ml, sodium hydroxide solution are that 1M, reaction times are 30min in (1); (2) coumarin-4-succinate is that 0.3g, double distilled dioxane solvent are that 25ml, Vinyl chloroformate are that 97 μ l, Tributylamine are that 178 μ l, ice bath reaction times are 30min in; (3) sodium hydroxide solution is 1M in, and overall agent is 200ml, and the reaction times is 8 hours in the refrigerator.
The above coumarin-4 that makes by the present invention-succinate haptens-BSA binding substances is carried out immunogen to be identified:
1, uv analysis method
Coumarin-4 behind the purifying-succinate haptens-BSA binding substances is measured with ultraviolet spectrometer, measure coumarin-4-succinate and BSA respectively with ultraviolet spectrometer simultaneously, whether with the checking binding substances is coumarin-4-succinate haptens-BSA binding substances, the coumarin-4 really-succinate haptens-BSA binding substances of checking result proof.
2, infrared analysis
Coumarin-4-succinate behind the freeze-drying purifying-BSA binding substances, pressing potassium bromide troche carries out infrared analysis, analyzes BSA and tonka bean camphor amber acid ester simultaneously, in order to judge whether binding substances, the binding substances of the succinate of tonka bean camphor really of judged result proof for the tonka bean camphor succinate.
3, flight mass spectrum method
Adopt substance assistant laser desorpted flight time mass spectrum (MALDI-TOF-MS) to analyze haptens and be attached to number on the BSA molecule, haptens is attached to number on the BSA molecule usually to be influenced antibody and produces.The author that past has thinks that the haptens of receiving on the BSA molecule is many as far as possible.Experimental result shows that too much haptens can not obtain expected result.Too much or the very few ability that produces antibody of bringing out that all may reduce of haptens.
Advantage of the present invention is: 1, the position of antigen and BSA connection directly influences the specificity of monoclonal antibody, the present invention is chosen in the unessential hydroxy position of identification and connects, the anticoagulation class rodenticide immunogen high specificity that synthesizes, can be further immune animal, for the monoclonal antibody of preparing high specificity is laid a good foundation; 2, synthetic method is simple, easy to operate among the present invention, does not need special plant and instrument.
Four, embodiment
The immunogenic synthetic method of a kind of anticoagulation class rodenticide of the present invention, anticoagulation class rodenticide metabolite in vivo is mainly the Hydroxycoumarin compounds, as umbelliferone, 4 hydroxy coumarin.Consider representativeness, selecting the haptens of anticoagulation class rodenticide is 4 hydroxy coumarin.It may further comprise the steps:
A) coumarin-4-succinate (Coumarin-4-hemisuccinate) is synthetic
Disubstituted-4-hydroxy tonka bean camphor 1.6g adds the 3.0g succinyl oxide in three mouthfuls of reaction flasks, refluxed 4 hours in 110 ℃ of pyridine media, dries pyridine solution with rotatory evaporator, chloroform extraction, and chloroform layer is washed 3 times with vapor enrichment, and product is a color of soy sauce oily body.
Coumarin-4-succinate synthetic route is as follows:
Figure A20031010638600061
4 hydroxy coumarin Succinic anhydried coumarin-7-succinate
(4-Hydroxycoumarin) Coumarin-4-hemisuccinate
(4-O-carboxymethylcoumarin)
B) coupling of coumarin-4-succinate-BAS binding substances
Raw material is:
Bovine serum albumin Bovine Serum Albumin (BSA), BR level, content 95% (albumin), molecular weight 67366.4.Tributylamine Tri-n-butylamine, molecular weight 185.34, CP is pure, and content is no less than 99%.Vinyl chloroformate Ethyl Chloroformate, molecular weight 108.53, CP is pure, and content is no less than 96.5.Dioxane AR level, vapor enrichment.The 1M sodium hydroxide solution.
Coupling process is:
(1) BSA 0.512g is dissolved in the 100ml double distilled water, transfers pH 8.5 with the 1M sodium hydroxide solution, reaction 30min.
(2) coumarin-4-succinate 0.3g is dissolved in the double distilled dioxane solvent of 25ml, adds 97 μ l Vinyl chloroformates, and 178 μ l Tributylamines are at ice bath reaction 30min.
(3) slowly pour into the solution of (2) in the solution of (1) and careful the stirring, add the 1M sodium hydroxide solution and transfer pH 8.5, add double distilled water, making overall agent was 200ml, 5 ℃ of refrigerators reactions 8 hours.
Coumarin-4-succinate-BSA coupling (mixed anhydride method) is as follows:
Tonka bean camphor succinate tonka bean camphor succinate-BSA binding substances
C) the freeze-drying purifying that anhydrates
Reacted solution is placed on freeze-drying in the Freeze Drying Equipment.Freeze dried binding substances is crossed dextran G50 post with the dissolving of 2ml phosphate buffer soln, receives the liquid at second peak, and receiving liquid freeze-drying in the freeze-drying machine is finished product anticoagulation mouse medicine binding substances.
Coumarin-4-succinate-immunogenic evaluation of BSA binding substances that above employing the present invention is made:
1, flight mass spectrum method
Coumarin-4 behind tonka bean camphor succinate-BSA binding substances purifying-succinate haptens-BSA binding substances is a medium with the sinapinic acid, carries out flight mass spectrum and measures.Because the molecular weight of binding substances is different with the molecular weight of BSA, the flight velocity in flight mass spectrum is different, according to the nucleo plasmic relation (m/z) of binding substances and BSA, can calculate the mol ratio that combines of carrier proteins and medicine in the immunogen.
Adopt JMS-LDI1700 time-of-fight mass spectrometry (TOF), N 2Laser apparatus, wavelength 337nm, pulse 3ns, detector voltage-4.75kv, matrix: 10 3The multiple sinapinic acid contains 10% trifluoroacetic acid aqueous solution.The molecular weight of coumarin-4-succinate is 262, and the molecular weight of the actual BSA of recording is 67366.4, and BSA-coumarin-7-succinate molecular weight is 70839.5.
2, ultra-violet analysis
Coumarin-4-succinate haptens-BSA binding substances (not freeze-drying) behind the dialysis purifying is measured with ultraviolet spectrometer, measure the UV spectrum of coumarin-4-succinate and BSA simultaneously respectively, if on BSA,, just do not have the absorption peak of coumarin-4-succinate not in conjunction with coumarin-4-succinate.Verify with this whether binding substances is coumarin-4-succinate-BSA binding substances, the coumarin-4 really-succinate haptens-BSA binding substances of checking result proof.
3, infrared analysis
Coumarin-4-succinate behind the purifying-BSA binding substances freeze-drying, pressing potassium bromide troche carries out infrared analysis, analyzes BSA and coumarin-4-succinate simultaneously, in order to judge whether binding substances, the binding substances of the succinate of tonka bean camphor really of judged result proof for coumarin-4-succinate.

Claims (7)

1, the immunogenic synthetic method of a kind of anticoagulation class rodenticide is characterized in that it may further comprise the steps:
A) use the Hydroxycoumarin compounds as haptens, utilize esterification to carry out chemically modified and obtain tonka bean camphor-succinate;
B) with steps A) tonka bean camphor-succinate of obtaining carries out coupling by the isobutyl chlorocarbonate method of mixed anhydride method;
C) with step B) reaction product that obtains is by dextran G50 gel column purifying, and the immunogenic binding substances of anticoagulation class rodenticide is prepared in freeze-drying.
2, the immunogenic synthetic method of anticoagulation class rodenticide according to claim 1, it is characterized in that: the compounds of Hydroxycoumarin steps A) is a 4 hydroxy coumarin.
3, the immunogenic synthetic method of anticoagulation class rodenticide according to claim 2, it is characterized in that: with steps A) in 4 hydroxy coumarin 1~2g place reaction flask, add succinyl oxide, in 100~120 ℃ of pyridine media, refluxed 3~5 hours, dry pyridine solution with rotatory evaporator again, chloroform extraction, chloroform layer is washed 2~4 times with vapor enrichment, and obtaining product is color of soy sauce oily body note legumin-succinate.
4, the immunogenic synthetic method of anticoagulation class rodenticide according to claim 2 is characterized in that: raw materials used bovine serum albumin, Tributylamine, Vinyl chloroformate, dioxane and the sodium hydroxide solution of comprising step B).
5, the immunogenic synthetic method of anticoagulation class rodenticide according to claim 4, it is characterized in that: described bovine serum albumin is the BR level, albumin content 95%, molecular weight 67366.4; Tributylamine is a molecular weight 185.34, and CP is pure, and content is no less than 99%; Vinyl chloroformate is a molecular weight 108.53, and CP is pure, and content is no less than 96.5%; Dioxane is the AR level, vapor enrichment; Sodium hydroxide solution is 1M.
6, the immunogenic synthetic method of anticoagulation class rodenticide according to claim 5 is characterized in that:
(1) at first bovine serum albumin is dissolved in the double distilled water, transfers to pH 8.5 afterreactions with sodium hydroxide solution;
(2) then coumarin-4-succinate is dissolved in the double distilled dioxane solvent, adds Vinyl chloroformate and Tributylamine, ice bath reaction again;
(3) solution that at last (2) is obtained is slowly poured in the solution of (1) and careful the stirring, adds sodium hydroxide solution and transfers to pH 8.5, adds double distilled water, and overall agent is reacted in 5 ℃ of refrigerators.
7, the immunogenic synthetic method of anticoagulation class rodenticide according to claim 6 is characterized in that: bovine serum albumin is that 0.512g, double distilled water are that 100ml, sodium hydroxide solution are that 1M, reaction times are 30min in (1); (2) coumarin-4-succinate is that 0.3g, double distilled dioxane solvent are that 25ml, Vinyl chloroformate are that 97 μ l, Tributylamine are that 178 μ l, ice bath reaction times are 30min in; (3) sodium hydroxide solution is 1M in, and overall agent is 200ml, and the reaction times is 8 hours in the refrigerator.
CN200310106386.6A 2003-11-21 2003-11-21 Anticoagulation raticide immunogen synthesis method Expired - Fee Related CN1233657C (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102875512A (en) * 2012-10-29 2013-01-16 公安部物证鉴定中心 Preparation method of anticoagulant raticide brodifacoum hapten and holoantigen
CN102898410A (en) * 2012-10-29 2013-01-30 公安部物证鉴定中心 Method for preparing anti-coagulation raticide bromadiolone half antigen and complete antigen
CN109824645A (en) * 2019-02-28 2019-05-31 中国农业大学 Warfarin haptens and artificial antigen and the preparation method and application thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109897025B (en) * 2019-02-28 2021-01-01 中国农业大学 Anticoagulant raticide hapten and artificial antigen as well as preparation method and application thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102875512A (en) * 2012-10-29 2013-01-16 公安部物证鉴定中心 Preparation method of anticoagulant raticide brodifacoum hapten and holoantigen
CN102898410A (en) * 2012-10-29 2013-01-30 公安部物证鉴定中心 Method for preparing anti-coagulation raticide bromadiolone half antigen and complete antigen
CN102875512B (en) * 2012-10-29 2014-12-17 公安部物证鉴定中心 Preparation method of anticoagulant raticide brodifacoum hapten and holoantigen
CN109824645A (en) * 2019-02-28 2019-05-31 中国农业大学 Warfarin haptens and artificial antigen and the preparation method and application thereof
CN109824645B (en) * 2019-02-28 2020-10-27 中国农业大学 Warfarin hapten and artificial antigen as well as preparation method and application thereof

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