Aptamer-based detection of fumonisin B1: A critical review

• Published in: Analytica chimica acta Vol. 1160; p. 338395
• Main Authors: Mirón-Mérida, Vicente Antonio, Gong, Yun Yun, Goycoolea, Francisco M.
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 22-05-2021
• Subjects: Analytical methods; Aptamers; Aptamers, Nucleotide; Aptasensors; Biosensors; Fumonisin B1; Fumonisins; Limit of Detection; Mycotoxins; Mycotoxins - analysis; Analytical methods; Fumonisin B1; Biosensors; Aptasensors; Mycotoxins; Aptamers
• ISSN: 0003-2670; 1873-4324
• DOI: 10.1016/j.aca.2021.338395

Mycotoxin contamination is a current issue affecting several crops and processed products worldwide. Among the diverse mycotoxin group, fumonisin B1 (FB1) has become a relevant compound because of its adverse effects in the food chain. Conventional analytical methods previously proposed to quantify FB1 comprise LC-MS, HPLC-FLD and ELISA, while novel approaches integrate different sensing platforms and fluorescently labelled agents in combination with antibodies. Nevertheless, such methods could be expensive, time-consuming and require experience. Aptamers (ssDNA) are promising alternatives to overcome some of the drawbacks of conventional analytical methods, their high affinity through specific aptamer-target binding has been exploited in various designs attaining favorable limits of detection (LOD). So far, two aptamers specific to FB1 have been reported, and their modified and shortened sequences have been explored for a successful target quantification. In this critical review spanning the last eight years, we have conducted a systematic comparison based on principal component analysis of the aptamer-based techniques for FB1, compared with chromatographic, immunological and other analytical methods. We have also conducted an in-silico prediction of the folded structure of both aptamers under their reported conditions. The potential of aptasensors for the future development of highly sensitive FB1 testing methods is emphasized.
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•An insight into the health significance of fumonisin B1 occurrence in foods.•A PCA systematic comparison of conventional and new detection techniques for FB1.•Recent advances and approaches in immunosensors for FB1 detection.•Comprehensive and critical review on aptamer-based determination of FB1.•An in-silico prediction of the folded structure of FB1 aptamers.