氯霉素人工免疫原的合成与鉴定

将氯霉素(CAP)进行化学修饰引入羧基活性基团,合成具有半抗原结构特征的氯霉素半琥珀酸酯(CAP-HS);采用混合酸酐(MA)法将CAP-HS与牛血清白蛋白(BSA)和卵清蛋白(OVA)偶联合成人工免疫原BSA-CAP-HS和包被原OVA-CAP-HS,用红外(IR)、紫外(UV)、凝胶电泳(SDS-PAGE)进行鉴定;用BSA-CAP-HS免疫BALB/C小鼠,间接ELISA测定多抗(pAb)效价,阻断ELISA鉴定其敏感性,交叉反应试验鉴定其特异性。结果表明,CAP-HS与BSA合成成功,其分子结合比为15.6∶1,获得了高价、敏感、特异的CAP pAb,为CAP残留免疫学检测方法的建立奠定了基础。     

氯羟吡啶人工抗原的合成及抗体特性

研究氯羟吡啶(CLOP)人工抗原合成及其多克隆抗体(pAb)制备。将CLOP进行化学修饰引入活性基团羧基,合成氯羟吡啶半抗原(CLOP-2C);分别采用活泼酯法和混合酸酐法将CLOP-2C与牛血清白蛋白(BSA)、卵清蛋白(OVA)偶联,合成人工免疫原CLOP-2C-BSA和包被抗原CLOP-2C-OVA,用紫外(UV)和凝胶电泳(SDS-PAGE)进行鉴定;用CLOP-2C-BSA免疫Balb/c小鼠,间接ELISA测定CLOP pAb效价,阻断ELISA鉴定其敏感性,交叉反应试验鉴定其特异性。结果表明:CLOP-2C-BSA偶联成功,CLOP-2C与BSA的分子结合比为34.0∶1;CLOP pAb效价达到1∶(2.56×104),对CLOP的IC50为7.76μg/L,与其他抗球虫药的交叉反应率低,获得高价、敏感、特异的CLOP pAb,为CLOP残留免疫学检测方法的建立奠定基础。     

氯霉素多克隆抗体的制备及其免疫学特性鉴定

将氯霉素(CAP)进行化学修饰引入羧基活性基团,合成具有半抗原结构特征的氯霉素半琥珀酸酯(CAP-HS);采用混合酸酐(MA)法将CAP-HS与牛血清白蛋白(BSA)和卵清蛋白(OVA)偶联合成人工免疫原BSA-CAP-HS和包被原OVA-CAP-HS,用红外(IR)、紫外(UV)、凝胶电泳(SDS-PAGE)进行鉴定;用BSA-CAP-HS免疫新西兰白兔和SPF鸡制备多克隆抗体(pAb),间接ELISA测定其效价,阻断ELISA鉴定其敏感性,琼脂双扩散试验、WestGold膜杂交试验和交叉反应试验鉴定其特异性。结果表明,BSA-CAP-HS偶联成功,其分子结合比为15.6∶1,获得了高价、敏感、特异的CAPpAb,为CAP残留免疫学检测方法的建立奠定了基础。     

苯巴比妥人工免疫原合成及抗体特性研究

将苯巴比妥(PB)经硝化和还原两步化学修饰后,在其苯环上引入活性基团氨基,合成具有半抗原结构特征的对氨基苯巴比妥(pAPB);用重氮化法将pAPB偶联于栽体蛋白BSA和OVA上,合成人工免疫原BSA-pAPB和包被抗原OVA-pAPB,用红外(IR)、紫外(UV)、SDS-PAGE进行鉴定,推算分子结合比;用BSA-pAPB免疫新西兰白兔和SPF雏鸡,间接ELISA测定多克隆抗体(pAb)效价,阻断ELISA鉴定其敏感性.WestGold层析试验和交叉反应试验鉴定其特异性.结果表明,BSA-pAPB偶联成功,分子结合比为1:19:获得了高价、敏感、特异的pAb,为PB残留免疫学检测方法的建立奠定了基础.     

兔抗IVM多克隆抗体的制备

将伊维菌素(IVM)进行化学修饰,引入羧基活性基团,合成具有半抗原结构特征的伊维菌素半琥珀酸酯(IVM-HS):然后采用NHS法和混合酸酐法将半抗原与聚-L-赖氨酸(PLL)和卵清蛋白(OVA)相偶联,制备人工免疫原(PLL-IVM-HS)和包被原(OVA-IVM-HS);经凝胶电泳鉴定,用人工免疫原免疫新西兰大白兔制备多克隆抗体(pAb),间接EUSA测定其效价.结果人工免疫原偶联成功,分子结合比为25.3:1,获得了高价、敏感、特异性的IVM pAb,为IVM残留免疫学检测法的建立奠定了基础.     

磺胺间甲嘧啶人工抗原的制备

采用重氮化法,将磺胺间甲嘧啶(SM1)与牛血清蛋白(BSA)偶联制备合成抗原BSA-SM1,并用作免疫抗原,用紫外扫描法和聚丙烯酰胺电泳法对其进行鉴定,并测得偶联的结合比.结果表明,通过紫外扫描和聚丙烯酰胺电泳法的测定证明偶联成功,偶联的结合比为9:1.用BSA-SDM免疫BALB/C小鼠,间接ELISA测定多抗上清(pAb)效价,获得了高效价的pAb,为SM1残留免疫学检测方法的建立奠定了基础.     

重金属锌离子人工抗原的合成及抗体特性

研究锌离子人工抗原的合成及其多克隆抗体(pAb)的制备。用异硫氰酸苄基乙二胺四乙酸(ITCBE)螯合Zn~(2+)合成Zn-ITCBE半抗原、异硫氰酯法制备免疫抗原Zn-ITCBE-BSA和包被原Zn-ITCBE-OVA,紫外分光光度法(UV)、SDS-PAGE和电感耦合等离子体原子发射光谱法(ICP-AES)进行鉴定;用Zn-ITCBE-BSA免疫Balb/c小鼠,间接ELISA测定Zn pAb效价,阻断ELISA鉴定其敏感性,交叉反应试验其特异性。结果表明,Zn-ITCBE-BSA偶联成功,Zn-ITCBE和BSA的分子结合比为25∶1,Zn pAb效价达到1∶(2.56×104),对Zn~(2+)的IC_(50)为9.23,与其他重金属离子的交叉反应率低,获得高价、敏感、特异的Zn pAb,为锌离子残留污染的免疫学检测方法的建立奠定基础。     

左氧氟沙星人工抗原的合成与鉴定

采用碳二亚胺法将左氧氟沙星（LVL）与牛血清白蛋白（BSA）偶联制备合成抗原BSA LVL,并用作免疫抗原,经紫外扫描法和聚丙烯酰胺电泳法对其进行鉴定,并测得偶联的结合比。结果表明,通过紫外扫描和聚丙烯酰胺电泳法的测定证明偶联成功,偶联的结合比为6∶1。用BSA LVL免疫BALB/c小鼠,间接ELISA测定多抗上清（pAb）效价,获得高效价的pAb,为进一步制备左氧氟沙星单克隆抗体提供良好的免疫原。     

磺胺间二甲氧嘧啶人工抗原的合成与鉴定

用重氮化方法将SDM偶联于载体蛋白BSA和OVA上,合成免疫抗原BSA-SDM和包被抗原OVA-SDM,通过紫外扫描(UV)、SDS-PAGE凝胶电泳试验。结果显示:BSA-SDM和OVA-SDM的UV与BSA、SDM的相比均发生了改变,出现了明显的特征峰。这表明半抗原和载体偶联成功。用BSA-SDM免疫BALB/C小鼠,间接ELISA测定多抗上清(pAb)效价。结果表明,获得了高效价的pAb,为SDM残留免疫学检测方法的建立奠定了基础。     

磺胺嘧啶多克隆抗体的制备

为制备磺胺嘧啶(sulfadiazine,SD)多克隆抗体(pAb),用重氮化方法将SD偶联于载体蛋白BSA和OVA上,合成免疫抗原BSA-SD和包被抗原OVA-SD。用紫外扫描、SDS-PAGE凝胶电泳试验检测,结果表明偶联成功。用BSA-SD免疫新西兰大白兔,间接ELISA测定多克隆抗体效价。阻断ELISA结果显示:SD单克隆抗体(pAb)的IC50达19.19ng/mL,和其他磺胺类药物交叉反应小于等于2.7%。结果表明,获得了高效价和特异的pAb。     

莱克多巴胺快速检测竞争ELISA试剂盒的研制及其性能测定(英文)

Mixed anhydride(MA)was used to conjugate ractopamine(RAC)to BSA and obtained artificial antigen BSA-RAC identified by UV and SDS-PAGE.Balb/c mice were immunized with BSA-RAC and hybridoma lines that secrete RAC monoclonal antibody(mAb)were generated with cell fusion.A ciELISA kit for detection of RAC(RAC-Kit)was developed with RAC mAb and its performance were tested.The results indicated that BSA-RAC was successfully synthesized and its conjugation ratio of RAC to BSA was about 24.5∶1.Three hybridoma lines were filtered and the best one was 4D8-3E11,its affinity constant(Ka)was 1.65×1010 L/mol.The limit of detection of RAC-Kit was 0.5 ng/ml and its detection range was 0.5-184 ng/ml.The mean recoveries of RAC spiked in feed were 85.6% and in swine urine were 88.6%.The precision and accuracy of the assay as determined by inter-assay and intra-assay coefficient variation were below 15%.It had 9.4% cross-reactivity(CR%)to dobutamine and little or no CR to other compounds.The validity of RAC-Kit in 4 ℃ was in 180 d.     

苦参碱人工抗原的合成与鉴定

【目的】合成并鉴定苦参碱人工抗原,以获取具有特异性和高亲和性的苦参碱多克隆抗体,为建立苦参碱的酶联免疫分析方法奠定基础。【方法】通过对槐果碱不饱和双键进行亲核加成、叠氮化、催化氢化合成苦参碱半抗原13氨基苦参碱(ST),并经MS、NMR法对其结构进行鉴定;采用戊二醛法将半抗原与载体蛋白偶联合成苦参碱的人工抗原(ST-BSA和ST-OVA),经紫外光谱扫描法、SDS-PAGE法、红外光谱扫描法对人工抗原进行鉴定;将制备的苦参碱人工抗原免疫健康新西兰大白兔获得苦参碱的多克隆抗体,通过间接非竞争ELISA方法测定其效价。【结果】成功合成了一种苦参碱半抗原13-氨基苦参碱(ST),与载体蛋白BSA、OVA偶联后得到了免疫原(ST-BSA)和包被原(ST-OVA),免疫新西兰大白兔获得多克隆抗体,效价达到128 000。【结论】成功合成了苦参碱人工抗原,为苦参碱免疫分析方法的研究提供了条件。     

Development of Anti-Isoproturon Polyclonal Antibody

A competitive enzyme-linked immunosorbent assay (ELISA) suitable for the determination of the urea herbicide isoproturon,3-(4-isopropylphenyl)-1,1-dimethylurea, in food and environmental samples was developed. Two haptens named 1-(3-carboxypropyl)-3-(4-isopropylphenyl)-1-methylurca (hapten 4C) and 1-(5-carboxypentyl)-3-(4-isopropylphenyl)-1-methylurea (hapten 6C) were synthesized. The haptens were coupled to bovine serum albumin (BSA) and ovalbumin(OVA), respectively, using the N-hydroxysuccinimide reaction. The hapten 6C-BSA conjugate was used as the immunogen,with which a high-titer anti-isoproturon polyclonal antibody (pAb) was successfully obtained by immunization of New Zealand white rabbits. The hapten 4C-OVA conjugate was used as coating antigen and a method of the indirect competitive ELISA for isoproturon was established. The haptens were confirmed with TLC, IR, and 1H NMR. The conjugation molar ratios of hapten 4C to OVA and hapten 6C to BSA were 36:1 and 46:1, respectively, as calculated by a UV spectrophotometry.The highest titer of the anti-isoproturon sera determined by a non-competitive indirect ELISA procedure was 1.6×105. The optimal concentrations of the coating antigen and the dilution of the anti-isoproturon sera used in the ELISA were 0.1 mg L-1 and 1.0 × 105, respectively. The concentration of isoproturon that inhibits 50% of antibody-antigen binding (IC50) was 0.07 mg mL-1.The cross-reactivities of six urea herbicides including chlorbromuron, fluometuron, monolinuron were lower than 0.1%. Isoproturon is a small molecule without immune activity and active functional group for attaching to carrier protein. To produce an antibody against isoproturon with high titer and high specificity is the most important step in the development of an immunochemical method for the determination of isoproturon in food and environmental samples. The two haptens synthesized in this study have carboxyl groups and accommodate different lengths of spacer arms, and the phenyl and isopropyl groups are fully exposed. An anti-isoproturon polyclonal antibody with high titer and high specificity was successfully obtained by immunization of rabbits with the conjugate of the hapten attached to the protein carrier.     

沙丁胺醇免疫原的合成与鉴定

将沙丁胺醇(SAL)经过琥珀酸单酯化后,采用混合酸酐法与载体蛋白偶联,用紫外扫描(UV)和变性凝胶电泳(SDS-PAGE)方法检验偶联效果,推算分子结合比;制备全抗原后免疫BALB/c小鼠,间接ELISA测定多抗血清效价,阻断ELISA鉴定其敏感性。UV和SDS-PAGE分析结果表明,成功制备了BSA-HS-SAL,SAL-HS与BSA的分子结合比为11∶1;ELISA结果表明,获得了高效价、敏感的SAL多克隆抗体,为SAL残留免疫学检测方法的建立奠定了基础。     

莫能菌素人工抗原合成及其多克隆抗体的制备

通过莫能菌素羟基与琥珀酸酐反应,合成半抗原莫能菌素-琥珀酰半酯,采用混合酸酐法将其与载体蛋白BSA偶联制备人工抗原,以此人工抗原免疫新西兰大白兔获得多克隆抗体.试验结果表明,莫能菌素结合抗原免疫家兔制备的抗体对莫能菌素具有很高的特异性、亲合性和选择性.用此抗体建立的莫能菌素间接竞争酶联免疫吸附检测方法的标准工作曲线I50值为37.9 ng/ml,最低检测限(I10)为2.09 ng/ml.     

除草剂2,4-D完全抗原的合成与鉴定

通过活化酯法和混合酸酐法,用牛血清蛋白(BSA)和卵清蛋白(OVA)合成2,4-D免疫抗原和包被抗原,再分别采用紫外分光光度法和酶联免疫吸附法(ELISA)进行鉴定.结果是:2种方法合成的完全抗原中2,4-D和蛋白质的偶联比分别为24:1和17:1,抗血清效价为1.28×104～2.56×104.