麦胚凝集素
荧光
凝集素
化学
病毒学
生物物理学
材料科学
生物
凝集素
生物化学
光学
物理
作者
Ting Wu,Yun Liu,Shao Zhou,Jiaxuan Li,Guohui Sun,Bing Gu,Chongwen Wang
出处
期刊:Small
[Wiley]
日期:2024-10-22
标识
DOI:10.1002/smll.202406053
摘要
Abstract The conventional lateral flow assay (LFA) fails to the demands for the accurate screening of viruses as a result of its low sensitivity of colorimetric signal output and poor universality limited by antibody pairs. Here, a magnetically assisted dual‐signal output LFA platform is developed for the ultrasensitive, universal, and flexible detection of viruses. A “three‐in‐one” multifunctional probe (MAuDQD) is prepared using a 180 nm Fe 3 O 4 core to load numerous Au nanoparticles (NPs) and two layers of QDs, which can substantially improve the sensitivity of LFA through coupling with the effects of magnetic enrichment and colorimetric/fluorescent enhancement. Wheat germ agglutinin (WGA)‐modified MAuDQD attained the broad‐spectrum capture viral membrane proteins and the colorimetric/fluorescent dual‐mode detection of severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) and monkeypox virus (MPXV) on the LFA strip. In the colorimetric mode, the target viruses detected directly, with the visual sensitivity reaching 0.1–0.5 ng mL −1 and the fluorescent mode supported quantitative analysis of SARS‐CoV‐2/MPXV with limits of detection decreasing to pg mL −1 level. Practicability of the MAuDQD@WGA‐LFA is verified through the detection of 33 real clinical samples, showing the proposed assay has a great potential to become a sensitive, accurate, and universal tool for on‐site monitoring of viral infections.
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