Aptamer-based assays: strategies in the use of aptamers conjugated to magnetic micro- and nanobeads as recognition elements in food control

• DOI: 10.1007/s00216-021-03501-6
• Publication Date: 2021-07-10T13:02:56Z
• Authors: Monica Mattarozzi; Lorenzo Toma; Alessandro Bertucci; Marco Giannetto; Maria Careri
• Keywords: Magnetic solid-phase extraction; Aptamer; Optical apta-assay; Magnetic Phenomena; Electrochemical aptasensor; Biosensing Techniques; Aptamers, Nucleotide; 01 natural sciences; Microspheres; Nanocomposites; 0104 chemical sciences; Food Microbiology; Magnetic bead; Gold; Food control; Trends; Food Analysis

AbstractAn outlook on the current status of different strategies for magnetic micro- and nanosized bead functionalization with aptamers as prominent bioreceptors is given with a focus on electrochemical and optical apta-assays, as well as on aptamer-modified magnetic bead–based miniaturized extraction techniques in food control. Critical aspects that affect interaction of aptamers with target molecules, as well as the possible side effects caused by aptamer interaction with other molecules due to non-specific binding, are discussed. Challenges concerning the real potential and limitations of aptamers as bioreceptors when facing analytical problems in food control are addressed. Graphical abstract