Nanozymes featuring a mesoporous silica shell for rapid enrichment and ultrasensitive lateral flow immunoassay of influenza A

IF 5.7 2区化学 Q1 CHEMISTRY, ANALYTICAL

Analytica Chimica Acta Pub Date : 2024-11-23 DOI:10.1016/j.aca.2024.343474

Jing Liang , Xiaoxian Liu , Zhenzhen Liu , Xuanming Xu , Yinuo Sun , Yuan Chen , Rui Xiao , Yajie Wang

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Abstract

Background

Respiratory illnesses stemming from influenza A viruses represent a significant worldwide health concern. There is an immediate need for a rapid and sensitive method to detect influenza A viruses early, without requiring extra equipment.

Results

Here, we established a lateral flow immunoassay (LFIA) for the detection of influenza A (Flu A) using a "three-in-one" multifunctional mesoporous Fe₃O₄@SiO₂@Pt nanozymes (Fe₃O₄@MSiO₂@Pt NZs) with excellent magnetic separation properties, colorimetric, and peroxidase-like (POD-like) activities. Effective enrichment of target Flu A in complex samples as well as greater loading of Pt particles by mesoporous structures with large specific surface area to enhance POD-like activity can significantly improve the detection sensitivity of the LFIA. After colorimetric amplification by Fe₃O₄@MSiO₂@Pt tags catalysis, the qualitative and quantitative results of detection for Flu A nucleoprotein (Flu A-NP) were 0.01 and 0.0089 ng mL⁻¹, respectively. This indicated a sensitivity approximately 100 times greater than commercially available colloidal Au nanoparticle (AuNP)-based LFIA strips. For detection of inactivated H1N1 virus, quantification can be as low as 33 copies mL⁻¹. Moreover, it demonstrated high accuracy in pharyngeal swab sample simulation experiments.

Significance

Therefore, the proposed platform based on Fe₃O₄@MSiO₂@Pt NZs-LFIA offered a promising approach for point-of-care testing (POCT), enabling rapid and ultrasensitive diagnosis of Flu A.

Abstract Image

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用于甲型流感快速富集和超灵敏侧流免疫测定的介孔二氧化硅壳纳米酶

背景由甲型流感病毒引起的呼吸道疾病是全球关注的重大健康问题。结果我们利用一种 "三合一 "多功能介孔 Fe3O4@SiO2@Pt 纳米酶（Fe3O4@MSiO2@Pt NZs）建立了一种检测甲型流感（Flu A）的侧向流免疫分析法（LFIA），该方法具有优异的磁分离性能、比色和过氧化物酶样（POD-like）活性。在复杂样品中有效富集目标 Flu A 以及通过具有大比表面积的介孔结构增加 Pt 颗粒的负载以提高 POD 样活性，可以显著提高 LFIA 的检测灵敏度。经 Fe3O4@MSiO2@Pt 标签催化比色放大后，Flu A 核蛋白（Flu A-NP）的定性和定量检测结果分别为 0.01 和 0.0089 ng mL-1。这表明其灵敏度约为市售基于胶体金纳米粒子（AuNP）的 LFIA 试剂条的 100 倍。在检测灭活的 H1N1 病毒时，定量可低至 33 拷贝 mL-1。因此，基于 Fe3O4@MSiO2@Pt NZs-LFIA 的拟议平台为床边检测（POCT）提供了一种前景广阔的方法，可实现甲型流感的快速、超灵敏诊断。

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来源期刊

Analytica Chimica Acta 化学-分析化学

CiteScore

10.40

自引率

6.50%

发文量

1081

审稿时长

38 days

期刊介绍： Analytica Chimica Acta has an open access mirror journal Analytica Chimica Acta: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Analytica Chimica Acta provides a forum for the rapid publication of original research, and critical, comprehensive reviews dealing with all aspects of fundamental and applied modern analytical chemistry. The journal welcomes the submission of research papers which report studies concerning the development of new and significant analytical methodologies. In determining the suitability of submitted articles for publication, particular scrutiny will be placed on the degree of novelty and impact of the research and the extent to which it adds to the existing body of knowledge in analytical chemistry.