Academic Journal
Monitoring bacterial burden, inflammation and bone damage longitudinally using optical and μCT imaging in an orthopaedic implant infection in mice.
| العنوان: | Monitoring bacterial burden, inflammation and bone damage longitudinally using optical and μCT imaging in an orthopaedic implant infection in mice. |
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| المؤلفون: | Jared A Niska, Jeffrey A Meganck, Jonathan R Pribaz, Jonathan H Shahbazian, Ed Lim, Ning Zhang, Brad W Rice, Ali Akin, Romela Irene Ramos, Nicholas M Bernthal, Kevin P Francis, Lloyd S Miller |
| المصدر: | PLoS ONE, Vol 7, Iss 10, p e47397 (2012) |
| بيانات النشر: | Public Library of Science (PLoS) |
| سنة النشر: | 2012 |
| المجموعة: | Directory of Open Access Journals: DOAJ Articles |
| مصطلحات موضوعية: | Medicine, Science |
| الوصف: | Background Recent advances in non-invasive optical, radiographic and μCT imaging provide an opportunity to monitor biological processes longitudinally in an anatomical context. One particularly relevant application for combining these modalities is to study orthopaedic implant infections. These infections are characterized by the formation of persistent bacterial biofilms on the implanted materials, causing inflammation, periprosthetic osteolysis, osteomyelitis, and bone damage, resulting in implant loosening and failure. Methodology/principal findings An orthopaedic implant infection model was used in which a titanium Kirshner-wire was surgically placed in femurs of LysEGFP mice, which possess EGFP-fluorescent neutrophils, and a bioluminescent S. aureus strain (Xen29; 1×10(3) CFUs) was inoculated in the knee joint before closure. In vivo bioluminescent, fluorescent, X-ray and μCT imaging were performed on various postoperative days. The bacterial bioluminescent signals of the S. aureus-infected mice peaked on day 19, before decreasing to a basal level of light, which remained measurable for the entire 48 day experiment. Neutrophil EGFP-fluorescent signals of the S. aureus-infected mice were statistically greater than uninfected mice on days 2 and 5, but afterwards the signals for both groups approached background levels of detection. To visualize the three-dimensional location of the bacterial infection and neutrophil infiltration, a diffuse optical tomography reconstruction algorithm was used to co-register the bioluminescent and fluorescent signals with μCT images. To quantify the anatomical bone changes on the μCT images, the outer bone volume of the distal femurs were measured using a semi-automated contour based segmentation process. The outer bone volume increased through day 48, indicating that bone damage continued during the implant infection. Conclusions/significance Bioluminescent and fluorescent optical imaging was combined with X-ray and μCT imaging to provide noninvasive and longitudinal ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 1932-6203 |
| Relation: | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23082163/pdf/?tool=EBI; https://doaj.org/toc/1932-6203; https://doaj.org/article/7516798e99424bcc93ed9e0f9e2897ca |
| DOI: | 10.1371/journal.pone.0047397 |
| الاتاحة: | https://doi.org/10.1371/journal.pone.0047397 https://doaj.org/article/7516798e99424bcc93ed9e0f9e2897ca |
| رقم الانضمام: | edsbas.E07C4D92 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 19326203 |
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| DOI: | 10.1371/journal.pone.0047397 |