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Aguilera-Correa JJ, Salinas B, González-Arjona M, de Pablo D, Muñoz P, Bouza E, Fernández Aceñero MJ, Esteban J, Desco M, Cussó L. Positron Emission Tomography-Computed Tomography and Magnetic Resonance Imaging Assessments in a Mouse Model of Implant-Related Bone and Joint Staphylococcus aureus Infection. Microbiol Spectr 2023; 11:e0454022. [PMID: 37010409 PMCID: PMC10269916 DOI: 10.1128/spectrum.04540-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 03/04/2023] [Indexed: 04/04/2023] Open
Abstract
Osteomyelitis is an infection of the bone, associated with an inflammatory process. Imaging plays an important role in establishing the diagnosis and the most appropriate patient management. However, data are lacking regarding the use of preclinical molecular imaging techniques to assess osteomyelitis progression in experimental models. This study aimed to compare structural and molecular imaging to assess disease progression in a mouse model of implant-related bone and joint infections caused by Staphylococcus aureus. In SWISS mice, the right femur was implanted with a resorbable filament impregnated with S. aureus (infected group, n = 10) or sterile culture medium (uninfected group, n = 6). Eight animals (5 infected, 3 uninfected) were analyzed with magnetic resonance imaging (MRI) at 1, 2, and 3 weeks postintervention, and 8 mice were analyzed with [18F]fluorodeoxyglucose (FDG)-positron emission tomography (PET)-computed tomography (CT) at 48 h and at 1, 2, and 3 weeks postintervention. In infected animals, CT showed bone lesion progression, mainly in the distal epiphysis, although some uninfected animals presented evident bone sequestra at 3 weeks. MRI showed a lesion in the articular area that persisted for 3 weeks in infected animals. This lesion was smaller and less evident in the uninfected group. At 48 h postintervention, FDG-PET showed higher joint uptake in the infected group than in the uninfected group (P = 0.025). Over time, the difference between groups increased. These results indicate that FDG-PET imaging was much more sensitive than MRI and CT for differentiating between infection and inflammation at early stages. FDG-PET clearly distinguished between infection and postsurgical bone healing (in uninfected animals) from 48 h to 3 weeks after implantation. IMPORTANCE Our results encourage future investigations on the utility of the model for testing different therapeutic procedures for osteomyelitis.
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Affiliation(s)
- J. J. Aguilera-Correa
- Departamento de Química en Ciencias Farmacéuticas. Universidad Complutense de Madrid, Madrid, Spain
- CIBERINFEC-CIBER de Enfermedades Infecciosas, Instituto de Salud Carlos III, Madrid, Spain
| | - B. Salinas
- Unidad de Medicina y Cirugía Experimenta, Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
- Departamento de Bioingeniería, Universidad Carlos III de Madrid, Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain
- CIBER de Salud Mental, Instituto de Salud Carlos III. Madrid, Spain
| | - M. González-Arjona
- Unidad de Medicina y Cirugía Experimenta, Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain
| | - D. de Pablo
- Servicio de Anatomía Patológica Hospital Clínico San Carlos, Fundación para la Investigación Biomédica HCSC, Madrid, Spain
| | - P. Muñoz
- Servicio de Microbiología y Enfermedades Infecciosas, Hospital General Universitario Gregorio Marañón, Madrid, Spain
- Departamento de Medicina, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
- CIBER Enfermedades Respiratorias, CIBERES, Madrid, Spain
| | - E. Bouza
- Servicio de Microbiología y Enfermedades Infecciosas, Hospital General Universitario Gregorio Marañón, Madrid, Spain
- Departamento de Medicina, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
- CIBER Enfermedades Respiratorias, CIBERES, Madrid, Spain
| | - M. J. Fernández Aceñero
- Servicio de Anatomía Patológica Hospital Clínico San Carlos, Fundación para la Investigación Biomédica HCSC, Madrid, Spain
| | - J. Esteban
- CIBERINFEC-CIBER de Enfermedades Infecciosas, Instituto de Salud Carlos III, Madrid, Spain
- Clinical Microbiology Department, IIS-Fundacion Jimenez Diaz, UAM, Madrid, Spain
| | - M. Desco
- Unidad de Medicina y Cirugía Experimenta, Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
- Departamento de Bioingeniería, Universidad Carlos III de Madrid, Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain
- CIBER de Salud Mental, Instituto de Salud Carlos III. Madrid, Spain
| | - L. Cussó
- Unidad de Medicina y Cirugía Experimenta, Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain
- CIBER de Salud Mental, Instituto de Salud Carlos III. Madrid, Spain
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