Rational Design of a User-Friendly Aptamer/Peptide-Based Device for the Detection of Staphylococcus aureus

Autor: Luca Ronda, Alessandro Tonelli, Elisa Sogne, Ida Autiero, Francesca Spyrakis, Sara Pellegrino, Giorgio Abbiati, Elisa Maffioli, Carsten Schulte, Riccardo Piano, Pietro Cozzini, Andrea Mozzarelli, Stefano Bettati, Francesca Clerici, Paolo Milani, Cristina Lenardi, Gabriella Tedeschi, Maria Luisa Gelmi
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Sensors, Vol 20, Iss 17, p 4977 (2020)
Druh dokumentu: article
ISSN: 20174977
1424-8220
DOI: 10.3390/s20174977
Popis: The urgent need to develop a detection system for Staphylococcus aureus, one of the most common causes of infection, is prompting research towards novel approaches and devices, with a particular focus on point-of-care analysis. Biosensors are promising systems to achieve this aim. We coupled the selectivity and affinity of aptamers, short nucleic acids sequences able to recognize specific epitopes on bacterial surface, immobilized at high density on a nanostructured zirconium dioxide surface, with the rational design of specifically interacting fluorescent peptides to assemble an easy-to-use detection device. We show that the displacement of fluorescent peptides upon the competitive binding of S. aureus to immobilized aptamers can be detected and quantified through fluorescence loss. This approach could be also applied to the detection of other bacterial species once aptamers interacting with specific antigens will be identified, allowing the development of a platform for easy detection of a pathogen without requiring access to a healthcare environment.
Databáze: Directory of Open Access Journals
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