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基于超亮橙黄色聚集诱导发光纳米粒子高灵敏定量检测玉米中赭曲霉毒素A的研究
Ultrabright orange-yellow aggregation-induced emission nanoparticles for highly sensitive immunochromatographic quantification of ochratoxin a in corn
【作者】 陈国欣; 陈樨蕊; 徐舸; 魏夏夏; 林相恺; 苏瑜; 熊勇华; 黄小林;
【Author】 Chen Guoxin;Chen Xirui;Xu Ge;Wei Xiaxia;Lin Xiangkai;Su Yu;Xiong Yonghua;Huang Xiaolin;State Key Laboratory of Food Science and Resources,Nanchang University;School of Food Science and Technology,Nanchang University;Jiangxi-OAI Joint Research Institute,Nanchang University;
【机构】 南昌大学食品科学与资源挖掘全国重点实验室; 南昌大学食品学院; 南昌大学江西-OAI联合研究院;
【摘要】 在本研究中,我们构建了一种以橙黄色发射的聚集诱导发光微球(AIENPs)为纳米探针的免疫层析分析(ICA)平台,用于高灵敏检测赭曲霉毒素A(OTA)。具体而言,将AIENPs标记抗OTA腹水,并以此构建免疫层析分析方法用于复杂基质中OTA的定量检测。在最佳实验条件下,本文构建的AIENPs-ICA比传统基于金纳米粒子的ICA具有更强的信号输出能力和更高的灵敏度,其半数抑制浓度低至0.149 ng mL-1,通过计算10%竞争抑制率所得的最低检测限低至0.042 ng mL-1.此外,AIENPs-ICA的平均回收率为82.60%至113.14%,变异系数介于1.26%至11.57%之间,由此表明本文所提出的方法具有良好的可靠性和优异的重现性。与此同时,所开发的AIENPs-ICA与其他霉菌毒素的交叉反应可以忽略不计。综上述说,本文所提出的AIENPs-ICA平台有望为现场检测食品样品中OTA和其他有害分子提供强有力的技术支撑。
【Abstract】 Herein,we report a novel aggregation-induced emission nanoparticles(AIENPs)-based immunochromatography assay(ICA) platform to detect ochratoxin A(OTA) using orange-yellow-emitting AIENPs as fluorescent nanoprobes.Immunochromatographic strip is used for the quantitative detection of OTA in crop matrix using AIENPs coupled with anti-OTA ascites.Under optimal conditions,AIENPs-ICA exhibits stronger signal output capacity and higher sensitivity than traditional gold nanoparticles-based IC.A.The half-maximal inhibitory concentration is as low as 0.149 ng mL-1,and the limit detection is 0.042 ng mL-1 at 10 % competitive inhibition concentration.The average recovery of AIENPs-ICA ranges from 82.60% to 113.14 % with the coefficient of variation ranging from 1.26 % to 11.57 %,proving the proposed method possesses good reliability and reproducibility.Moreover,the developed AIENPs-ICA exhibits negligible cross-reactions with other mycotoxins.We believe the presented AIENPs-ICA platform holds promising potential as a powerful tool for on-site detection of OTA and other molecules detection in food samples.
【Key words】 aggregation-induced emission; fluorescent nanoprobes; immunochromatography assay; ochratoxin A;
- 【会议录名称】 中国食品科学技术学会第二十届年会论文摘要集
- 【会议名称】中国食品科学技术学会第二十届年会
- 【会议时间】2023-10-24
- 【会议地点】中国湖南长沙
- 【分类号】TS210.7;O657.3
- 【主办单位】中国食品科学技术学会