Abstract
Leucomalachite green (LMG), a derivative antimicrobial agent, can accumulate in animal tissues for long periods and is categorized as a carcinogen affecting consumer health. Therefore, determining the contamination of aquatic products by LMG is necessary to prevent residual contamination. In the work described herein, the detection of LMG based on a colorimetric method using gold nanoparticles (AuNPs) was developed. The specificity of isolated single-stranded DNA aptamers to LMG was proven by using LMG and other antibiotics. The binding affinity of the LMG-aptamer showed a Kd value of 1.94 pM. Furthermore, a colorimetric detection module was successfully developed, showing a limit of detection (LOD) value of LMG at 250 nM using standard LMG substance. Taken together, this research demonstrates a rapid and sensitive method to detect chemical residues, reducing the possibility of contamination in fishery products. Considering these findings, the aptamer-based colorimetric approach might be feasible to utilize as a biosensing module, providing a rapid, inexpensive analysis method for detecting deposited chemical residues.
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Acknowledgements
This work was also supported by the Japan Science and Technology Agency/Japan International Cooperation Agency, Science and Technology Research Partnership for Sustainable Development (JST/JICA, SATREPS) and Kasetsart University Research and Development Institute under grant number KURDI FF(KU) 17.64. CJ is supported in part by the Graduate Program Scholarship from The Graduate School, Kasetsart University.
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Jaengphop, C., Phurahong, T., Hirono, I. et al. Novel, rapid, and sensitive colorimetric detection of leucomalachite green using a specific aptamer. Fish Sci 89, 809–821 (2023). https://doi.org/10.1007/s12562-023-01723-4
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DOI: https://doi.org/10.1007/s12562-023-01723-4