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Near-infrared fluorescence imaging as an alternative to bioluminescent bacteria to monitor biomaterial-associated infections

Paper ID Volume ID Publish Year Pages File Format Full-Text
403 42 2014 10 PDF Available
Title
Near-infrared fluorescence imaging as an alternative to bioluminescent bacteria to monitor biomaterial-associated infections
Abstract

Biomaterial-associated infection is one of the most common complications related to the implantation of any biomedical device. Several in vivo imaging platforms have emerged as powerful diagnostic tools to longitudinally monitor biomaterial-associated infections in small animal models. In this study, we directly compared two imaging approaches: bacteria engineered to produce luciferase to generate bioluminescence and reactive oxygen species (ROS) imaging of the inflammatory response associated with the infected implant. We performed longitudinal imaging of bioluminescence associated with bacteria strains expressing plasmid-integrated luciferase driven by different promoters or a strain with the luciferase gene integrated into the chromosome. These luminescent strains provided an adequate signal for acute (0–4 days) monitoring of the infection, but the bioluminescence signal decreased over time and leveled off at 7 days post-implantation. This loss in the bioluminescence signal was attributed to changes in the metabolic activity of the bacteria. In contrast, near-infrared fluorescence imaging of ROS associated with inflammation to the implant provided sensitive and dose-dependent signals of biomaterial-associated bacteria. ROS imaging exhibited higher sensitivity than the bioluminescence imaging and was independent of the bacteria strain. Near-infrared fluorescence imaging of inflammatory responses represents a powerful alternative to bioluminescence imaging for monitoring biomaterial-associated bacterial infections.

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Keywords
Biomaterial-associated infection; Bioluminescence; Near infrared fluorescence; Noninvasive monitoring; Staphylococcus aureus
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Near-infrared fluorescence imaging as an alternative to bioluminescent bacteria to monitor biomaterial-associated infections
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 10, Issue 7, July 2014, Pages 2935–2944
Authors
, , , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us