Capture Antibody Imitator MnO2 Nanozyme-Based Dual-Signal Immunochromatographic Assay for Rapid Detection of Salmonella Enteritidis
Chemical engineering journal(2023)
摘要
The sensitive and rapid detection of foodborne pathogens is of great significance to global public health security. Here, with two-dimensional nanomaterial MnO2 NSs as the capture antibody imitator and signal reporter molecules, based on its enzymecatalyzed signal amplification capability, a label-free, dual-signal output immuno-chromatographic biosensor was constructed to achieve the sensitive detection of S. enteritidis. The capture antibody imitator of MnO2 capture probe shows an outstanding capture ability, forming a stable immune complex with S. enteritidis. As an in-situ catalytic amplification colorimetric signal trigger, MnO2 NSs exert oxidase-like enzyme activity and obtain satisfactory detection sensitivity. It is worth noting that the proposed dual-signal ICA has high analytical performances for S. enteritidis during the concentration range of 103-107 cfu mL-1 both in standard bacterial solutions and food matrixes.
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关键词
Immunochromatographic assay,MnO2,Nanozyme,Label-free,Salmonella enteritidis
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