Impedimetric antimicrobial peptide-based sensor for the early detection of periodontopathogenic bacteria
Autor/a
Hoyos Nogués, Mireia
Brosel-Oliu, Sergi
Abramova, Natasha
Muñoz, Francesc-Xavier
Bratov, Andrey
Mas Moruno, Carlos
Gil Mur, Francisco Javier
Fecha de publicación
2016-12-15ISSN
0956-5663
Resumen
Peri-implantitis, an inflammation caused by biofilm formation, constitutes a major cause of implant failure in dentistry. Thus, the detection of bacteria at the early steps of biofilm growth represents a powerful strategy to prevent implant-related infections. In this regard, antimicrobial peptides (AMPs) can be used as effective biological recognition elements to selectively detect the presence of bacteria. Thus, the aim of the present study was to combine the use of miniaturized and integrated impedimetric transducers and AMPs to obtain biosensors with high sensitivity to monitor bacterial colonization. Streptococcus sanguinis, which is one of the most prevalent strains in the onset of periodontal diseases, was used as a model of oral bacteria. To this end, a potent AMP derived from human lactoferrin was synthesized and covalently immobilized on interdigitated electrode arrays (IDEA). X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS) were employed to optimize and characterize the method of immobilization. Noteworthy, the interaction of Streptococcus sanguinis with AMP-coated sensors provoked significant changes in the impedance spectra, which were univocally associated with the presence of bacteria, proving the feasibility of our method. In this regard, the developed biosensor permits to detect the presence of bacteria at concentrations starting from 101 colony forming units (CFU) mL−1 in KCl and from 102 CFU mL−1 in artificial saliva. Moreover, the system was devoid of cytotoxicity for human fibroblasts. These results indicate that the proposed approach can be effective in the detection of initial stages of biofilm formation, and may be useful in the early prevention and treatment of peri-implantitis.
Tipo de documento
Artículo
Versión del documento
Versión aceptada
Lengua
Inglés
Materias (CDU)
57 - Biología
Palabras clave
Antibiòtics
Pèptids
Biosensors
Bacteriologia
Antibióticos
Péptidos
Biosensores
Bacteriología
Antibiotic
Peptides
Biosensors
Bacteriology
Páginas
27
Publicado por
Elsevier
Colección
86;
Publicado en
Biosensors and Bioelectronics
Citación
Hoyos-Nogués, Mireia; Brosel-Oliu, Sergi; Abramova, Natasha [et al.]. Impedimetric antimicrobial peptide-based sensor for the early detection of periodontopathogenic bacteria. Biosensors and Bioelectronics, 2016 Dec, 86, p. 377-385. Disponible en: <https://www.sciencedirect.com/science/article/pii/S0956566316306066?via%3Dihub>. Fecha de acceso: 8 may. 2020. DOI: 10.1016/j.bios.2016.06.066
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- Ciències de la Salut [532]
Derechos
© 2016 Elsevier B.V. All rights reserved.