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BioMed Research International
Volume 2016 (2016), Article ID 4307987, 6 pages
Research Article

Method Based on the β-Lactamase PenPC Fluorescent Labeled for β-Lactam Antibiotic Quantification in Human Plasma

1Departamento de Medicina Intensiva, Facultad de Medicina y Hospital Clínico, Pontificia Universidad Católica de Chile, Santiago, Chile
2State Key Laboratory of Chirosciences, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong

Received 12 November 2015; Revised 31 December 2015; Accepted 3 January 2016

Academic Editor: Carla R. Arciola

Copyright © 2016 Max Andresen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Recently, Wong et al. have successfully developed a fluorescent biosensor based on the PenPC β-lactamase which changes its intrinsic fluorescence in presence of β-lactam antibiotics (BLAs). Here, we studied systematically this correlation among the fluorescence change of the biosensor and the concentration of different BLAs aimed at developing a novel method for estimating the concentration of a wide range of BLAs. This method showed high precision and specificity and very low interference from clinically relevant samples. We were able to monitor the pharmacokinetics of meropenem in healthy volunteers as well as in an ill animal model too, indicating that the implemented method could be suitable for clinical practice.