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一种呋喃西林酶联免疫检测方法的建立

2020-03-31李泳宁彭臻菲黄慧蔡美虹林清清

安徽农业科学 2020年4期

李泳宁 彭臻菲 黄慧 蔡美虹 林清清

摘要[目的]建立一种饲料中呋喃西林酶联免疫检测方法。[方法]利用制备的人工抗原和高特异性单克隆抗体,采用间接竞争酶联免疫技术建立呋喃西林检测方法。[结果]在优化条件下,检测抗原浓度为10 μg/mL,抗体稀释度为1∶5 000。呋喃西林在0.1~10.0 ng/mL具有较好的线性关系(R2=0.998 7),IC50为1.43 ng/mL。与呋喃唑酮、呋喃它酮、呋喃妥因和呋喃西林代谢物氨基脲的交叉反应率低于0.5%。饲料样品中添加呋喃西林的平均回收率为87.5%~96.0%,变异系数为6.1%~9.7%。[结论]该方法快速、准确、灵敏,可用于饲料中呋喃西林的分析检测。

关键词呋喃西林;酶联免疫检测;单克隆抗体;饲料

中图分类号R446.6文献标识码A

文章编号0517-6611(2020)04-0193-03

doi:10.3969/j.issn.0517-6611.2020.04.056

开放科学(资源服务)标识码(OSID):

Establishment of Enzyme-Linked Immunosorbent Assay for the Determination of Nitrofurazone

LI Yong-ning,PENG Zhen-fei,HUANG Hui et al(Fujian Health College,Fuzhou,Fujian 350101)

Abstract[Objective]To establish an enzyme-linked immunosorbent assay (ELISA) for the determination of nitrofurazone in feed.[Method]The artificial antigen and the high specificity monoclonal antibodies against nitrofurazone were prepared.An indirect competitive ELISA for the determination of nitrofurazone in feed was established.[Result]The optimization of ELISA parameters were that the concentration of antigen was 10 μg/mL and the dilution multiples of antibodies was 1∶5 000.The good linear range was 0.1-10.0 ng/mL(R2=0.998 7) and IC50 was 1.43 ng/mL.The cross-reactivity (CR) rate was less than 0.5% with other nitrofurans such as furazolidone,furaltadone,furantoin and semicarbazide.The average recovery from artificially contaminated nitrofurazone of feed was 87.5%-96.0%,with coefficient of variation (CV) was 6.1%-9.7%.[Conclusion]The method developed is rapid,accurate and sensitive and will be helpful for rapid screening for nitrofurazone in feed.

Key wordsNitrofurazone;Enzyme-linked immunosorbent assay (ELISA);Monoclonal antibody;Feed

硝基呋喃类药物是一类具有5-硝基呋喃基本结构的广谱抗菌药物,对大多数革兰氏阳性菌和革兰氏阴性菌、某些真菌和原虫均有作用[1]。呋喃西林是硝基呋喃类代表药物之一,具有杀菌能力强、抗菌谱广和价格低廉等优点,曾被广泛使用在养殖业中。但越来越多的研究表明,硝基呋喃类药物及其代谢产物具有一定的毒性作用,可诱发癌症[2],尤其是呋喃西林代谢物氨基脲对人体有致癌、致畸胎等副作用[3]。因此,越来越多的国家严禁使用呋喃西林药物,而2002年我国农业部193号公告也禁止使用硝基呋喃类药物在食用动物上。但是由于呋喃西林使用效果明显、价格便宜,目前仍然存在违规用药情况。因此,对呋喃西林的检测显得尤为重要。

目前,呋喃西林的方法主要有高效液相色谱法[4-5]和液相色谱-质谱联用法[6-7]。……

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