RNA aptamer-packaged virus-like particles for label-free, rapid, and on-site fluorescence detection of malachite green in aquatic products
Issued Date
2025-11-15
Resource Type
ISSN
09565663
eISSN
18734235
Scopus ID
2-s2.0-105011191653
Journal Title
Biosensors and Bioelectronics
Volume
288
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SCOPUS
Bibliographic Citation
Biosensors and Bioelectronics Vol.288 (2025)
Suggested Citation
Pan Y.C., Chen Y.T., Pang H.H., Prayadrat C., Huang S.C., Yang H.W. RNA aptamer-packaged virus-like particles for label-free, rapid, and on-site fluorescence detection of malachite green in aquatic products. Biosensors and Bioelectronics Vol.288 (2025). doi:10.1016/j.bios.2025.117796 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/111398
Title
RNA aptamer-packaged virus-like particles for label-free, rapid, and on-site fluorescence detection of malachite green in aquatic products
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Abstract
Malachite green (MG) is a banned antimicrobial dye widely used in aquaculture, whose persistence and toxicity pose serious risks to human health and the environment. Rapid, on-site detection of MG residues in aquatic products is essential for food safety surveillance. Here, we report a label-free fluorescence biosensor based on RNA aptamer-packaged virus-like particles (RNApt<inf>MG</inf>@VLPs) for rapid and sensitive MG detection. This platform uniquely utilizes a scalable E. coli-based bioproduction system to encapsulate MG-specific RNA aptamers within bacteriophage Qβ VLPs, providing substantial protection against RNase A degradation and thermal stress. The resulting RNApt<inf>MG</inf>@VLPs were deposited onto 3 MM blotting paper to fabricate portable sensing papers, which are compatible with standard 96-well plates for convenient on-site analysis. Under optimized conditions, the sensing paper exhibited a strong linear response to MG across 0.1 ppb to 10,000 ppb, with a limit of detection (LOD) of 0.087 ppb and a limit of quantification (LOQ) of 0.29 ppb, surpassing regulatory thresholds set by China (1 ppb) and the European Food Safety Authority (2 ppb). These results underscore the promise of RNApt<inf>MG</inf>@VLPs sensing paper as a practical tool for rapid, field-deployable MG screening in food safety monitoring.