Rapid Colorimetric Detection of Pseudomonas aeruginosa in Clinical Isolates Using a Magnetic Nanoparticle Biosensor

Alhogail S, Suaifan GARY, Bikker FJ, Kaman WE, Weber K, Cialla-May D, Popp J, Zourob MM (2019)

Publication Type: Journal article

Publication year: 2019

Journal

ACS Omega American Chemical Society: Open Access Titles / American Chemical Society

Book Volume: 4

Pages Range: 21684-21688

Journal Issue: 26

DOI: 10.1021/acsomega.9b02080

Abstract

A rapid, sensitive, and specific colorimetric biosensor based on the use of magnetic nanoparticles (MNPs) was designed for the detection of Pseudomonas aeruginosa in clinical samples. The biosensing platform was based on the measurement of P. aeruginosa proteolytic activity using a specific protease substrate. At the N-terminus, this substrate was covalently bound to MNPs and was linked to a gold sensor surface via cystine at the C-terminus of the substrates. The golden sensor appears black to naked eyes because of the coverage of the MNPs. However, upon proteolysis, the cleaved peptide-MNP moieties will be attracted by an external magnet, revealing the golden color of the sensor surface, which can be observed by the naked eye. In vitro, the biosensor was able to detect specifically and quantitatively the presence of P. aeruginosa with a detection limit of 102 cfu/mL in less than 1 min. The colorimetric biosensor was used to test its ability to detect in situ P. aeruginosa in clinical isolates from patients. This biochip is anticipated to be useful as a rapid point-of-care device for the diagnosis of P. aeruginosa-related infections.

Involved external institutions

King Saud University (KSU) / جامعة الملك سعود‎‎ SA Saudi Arabia (SA) University of Jordan JO Jordan (JO) University of Amsterdam NL Netherlands (NL) Friedrich-Schiller-Universität Jena DE Germany (DE) Alfaisal University SA Saudi Arabia (SA)

How to cite

APA:

Alhogail, S., Suaifan, G.A.R.Y., Bikker, F.J., Kaman, W.E., Weber, K., Cialla-May, D.,... Zourob, M.M. (2019). Rapid Colorimetric Detection of Pseudomonas aeruginosa in Clinical Isolates Using a Magnetic Nanoparticle Biosensor. ACS Omega, 4(26), 21684-21688. https://doi.org/10.1021/acsomega.9b02080

MLA:

Alhogail, Sahar, et al. "Rapid Colorimetric Detection of Pseudomonas aeruginosa in Clinical Isolates Using a Magnetic Nanoparticle Biosensor." ACS Omega 4.26 (2019): 21684-21688.

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