1
|
Kwiatkowski G, Czyzynska-Cichon I, Tielemans B, Geerkens L, Jasztal A, Velde GV, Chłopicki S. Retrospectively gated ultrashort-echo-time MRI T 1 mapping reveals compromised pulmonary microvascular NO-dependent function in a murine model of acute lung injury. NMR IN BIOMEDICINE 2024; 37:e5105. [PMID: 38225796 DOI: 10.1002/nbm.5105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 12/05/2023] [Accepted: 12/22/2023] [Indexed: 01/17/2024]
Abstract
This study sought to develop noninvasive, in vivo imaging schemes that allow for quantitative assessment of pulmonary microvascular functional status based on the combination of pulmonary T1 mapping and dynamic contrast-enhanced (DynCE) imaging. Ultrashort-echo-time (UTE) imaging at 9.4 T of lung parenchyma was performed. Retrospective gating was based on modulation of the first point in each recorded spoke. T1 maps were obtained using a series of five consecutive images with varying RF angles and analyzed with the variable flip angle approach. The obtained mean T1 lung value of 1078 ± 38 ms correlated well with previous reports. Improved intersession variability was observed, as evident from a decreased standard deviation of motion-resolved T1 mapping (F-test = 0.051). Animals received lipopolysaccharide (LPS) and were imaged at t = 2, 6, and 12 h after administration. The nitric oxide (NO)-dependent function was assessed according to changes in lung T1 after L-NAME injection, while microvascular perfusion and oxidant stress were assessed with contrast-enhanced imaging after injection of gadolinium or 3-carbamoyl-proxyl nitroxide radical, respectively. Retrospectivel gated UTE allowed robust, motion-compensated imaging that could be used for T1 mapping of lung parenchyma. Changes in lung T1 after L-NAME injection indicated that LPS induced overproduction of NO at t = 2 and 6 h after LPS, but NO-dependent microvascular function was impaired at t = 12 h after LPS. DynCE imaging at t = 6 h after LPS injection revealed decreased microvascular perfusion, with increased vascular permeability and oxidant stress. MRI allows to visualize and quantify lung microvascular NO-dependent function and its concomitant impairment during acute respiratory distress syndrome development with high sensitivity. UTE T1 mapping appears to be sensitive and useful in probing pulmonary microvascular functional status.
Collapse
Affiliation(s)
- Grzegorz Kwiatkowski
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Krakow, Poland
| | - Izabela Czyzynska-Cichon
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Krakow, Poland
| | - Birger Tielemans
- Department of Imaging and Pathology, Biomedical MRI Unit/Molecular Small Animal Imaging Center (MoSAIC), KU Leuven, Leuven, Belgium
| | - Lotte Geerkens
- Department of Imaging and Pathology, Biomedical MRI Unit/Molecular Small Animal Imaging Center (MoSAIC), KU Leuven, Leuven, Belgium
| | - Agnieszka Jasztal
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Krakow, Poland
| | - Greetje Vande Velde
- Department of Imaging and Pathology, Biomedical MRI Unit/Molecular Small Animal Imaging Center (MoSAIC), KU Leuven, Leuven, Belgium
| | - Stefan Chłopicki
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Krakow, Poland
- Faculty of Medicine, Chair of Pharmacology, Jagiellonian University Medical College, Krakow, Poland
| |
Collapse
|
2
|
Dullin C, Albers J, Tagat A, Lorenzon A, D'Amico L, Chiriotti S, Sodini N, Dreossi D, Alves F, Bergamaschi A, Tromba G. In vivo low-dose phase-contrast CT for quantification of functional and anatomical alterations in lungs of an experimental allergic airway disease mouse model. Front Med (Lausanne) 2024; 11:1338846. [PMID: 38410752 PMCID: PMC10894991 DOI: 10.3389/fmed.2024.1338846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 01/22/2024] [Indexed: 02/28/2024] Open
Abstract
Introduction Synchrotron-based propagation-based imaging (PBI) is ideally suited for lung imaging and has successfully been applied in a variety of in vivo small animal studies. Virtually all these experiments were tailored to achieve extremely high spatial resolution close to the alveolar level while delivering high x-ray doses that would not permit longitudinal studies. However, the main rationale for performing lung imaging studies in vivo in small animal models is the ability to follow disease progression or monitor treatment response in the same animal over time. Thus, an in vivo imaging strategy should ideally allow performing longitudinal studies. Methods Here, we demonstrate our findings of using PBI-based planar and CT imaging with two different detectors-MÖNCH 0.3 direct conversion detector and a complementary metal-oxide-semiconductor (CMOS) detector (Photonics Science)-in an Ovalbumin induced experimental allergic airway disease mouse model in comparison with healthy controls. The mice were imaged free breathing under isoflurane anesthesia. Results At x-ray dose levels below those once used by commercial small animal CT devices at similar spatial resolutions, we were able to resolve structural changes at a pixel size down to 25 μm and demonstrate the reduction in elastic recoil in the asthmatic mice in cinematic planar x-ray imaging with a frame rate of up to 100 fps. Discussion Thus, we believe that our approach will permit longitudinal small animal lung disease studies, closely following the mice over longer time spans.
Collapse
Affiliation(s)
- Christian Dullin
- Institute for Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany
- Translational Molecular Imaging, Max-Plank-Institute for Multidisciplinary Sciences, Göttingen, Germany
- Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Jonas Albers
- Institute for Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany
- European Molecular Biology Laboratory, Hamburg Unit c/o Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany
| | - Aishwarya Tagat
- Department of Urology, University Hospital of Saarland, Homburg, Germany
| | | | - Lorenzo D'Amico
- Elettra-Sincrotrone Trieste S.C.p.A., Trieste, Italy
- Department of Physics, University of Trieste, Trieste, Italy
| | - Sabina Chiriotti
- PSD Detector Science and Characterization Group, Paul Scherrer Institute, Villingen, Switzerland
| | - Nicola Sodini
- Elettra-Sincrotrone Trieste S.C.p.A., Trieste, Italy
| | - Diego Dreossi
- Elettra-Sincrotrone Trieste S.C.p.A., Trieste, Italy
| | - Frauke Alves
- Institute for Diagnostic and Interventional Radiology, University Medical Center Göttingen, Göttingen, Germany
- Translational Molecular Imaging, Max-Plank-Institute for Multidisciplinary Sciences, Göttingen, Germany
- Department of Haematology and Medical Oncology, University Medical Center Göttingen, Göttingen, Germany
| | - Anna Bergamaschi
- PSD Detector Science and Characterization Group, Paul Scherrer Institute, Villingen, Switzerland
| | | |
Collapse
|
3
|
Fauveau V, Jacobi A, Bernheim A, Chung M, Benkert T, Fayad ZA, Feng L. Performance of spiral UTE-MRI of the lung in post-COVID patients. Magn Reson Imaging 2023; 96:135-143. [PMID: 36503014 PMCID: PMC9731813 DOI: 10.1016/j.mri.2022.12.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 11/18/2022] [Accepted: 12/01/2022] [Indexed: 12/13/2022]
Abstract
Patients recovered from COVID-19 may develop long-COVID symptoms in the lung. For this patient population (post-COVID patients), they may benefit from longitudinal, radiation-free lung MRI exams for monitoring lung lesion development and progression. The purpose of this study was to investigate the performance of a spiral ultrashort echo time MRI sequence (Spiral-VIBE-UTE) in a cohort of post-COVID patients in comparison with CT and to compare image quality obtained using different spiral MRI acquisition protocols. Lung MRI was performed in 36 post-COVID patients with different acquisition protocols, including different spiral sampling reordering schemes (line in partition or partition in line) and different breath-hold positions (inspiration or expiration). Three experienced chest radiologists independently scored all the MR images for different pulmonary structures. Lung MR images from spiral acquisition protocol that received the highest image quality scores were also compared against corresponding CT images in 27 patients for evaluating diagnostic image quality and lesion identification. Spiral-VIBE-UTE MRI acquired with the line in partition reordering scheme in an inspiratory breath-holding position achieved the highest image quality scores (score range = 2.17-3.69) compared to others (score range = 1.7-3.29). Compared to corresponding chest CT images, three readers found that 81.5% (22 out of 27), 81.5% (22 out of 27) and 37% (10 out of 27) of the MR images were useful, respectively. Meanwhile, they all agreed that MRI could identify significant lesions in the lungs. The Spiral-VIBE-UTE sequence allows for fast imaging of the lung in a single breath hold. It could be a valuable tool for lung imaging without radiation and could provide great value for managing different lung diseases including assessment of post-COVID lesions.
Collapse
Affiliation(s)
- Valentin Fauveau
- BioMedical Engineering and Imaging Institute (BMEII), Icahn School of Medicine at Mount Sinai, New York, USA
| | - Adam Jacobi
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Adam Bernheim
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Michael Chung
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Thomas Benkert
- MR Application Predevelopment, Siemens Healthcare GmbH, Erlangen, Germany
| | - Zahi A Fayad
- BioMedical Engineering and Imaging Institute (BMEII), Icahn School of Medicine at Mount Sinai, New York, USA; Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Li Feng
- BioMedical Engineering and Imaging Institute (BMEII), Icahn School of Medicine at Mount Sinai, New York, USA; Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, USA.
| |
Collapse
|
4
|
Giraudo C, Evangelista L, Fraia AS, Lupi A, Quaia E, Cecchin D, Casali M. Molecular Imaging of Pulmonary Inflammation and Infection. Int J Mol Sci 2020; 21:ijms21030894. [PMID: 32019142 PMCID: PMC7037834 DOI: 10.3390/ijms21030894] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 01/27/2020] [Accepted: 01/28/2020] [Indexed: 12/14/2022] Open
Abstract
Infectious and inflammatory pulmonary diseases are a leading cause of morbidity and mortality worldwide. Although infrequently used in this setting, molecular imaging may significantly contribute to their diagnosis using techniques like single photon emission tomography (SPET), positron emission tomography (PET) with computed tomography (CT) or magnetic resonance imaging (MRI) with the support of specific or unspecific radiopharmaceutical agents. 18F-Fluorodeoxyglucose (18F-FDG), mostly applied in oncological imaging, can also detect cells actively involved in infectious and inflammatory conditions, even if with a low specificity. SPET with nonspecific (e.g., 67Gallium-citrate (67Ga citrate)) and specific tracers (e.g., white blood cells radiolabeled with 111Indium-oxine (111In) or 99mTechnetium (99mTc)) showed interesting results for many inflammatory lung diseases. However, 67Ga citrate is unfavorable by a radioprotection point of view while radiolabeled white blood cells scan implies complex laboratory settings and labeling procedures. Radiolabeled antibiotics (e.g., ciprofloxacin) have been recently tested, although they seem to be quite unspecific and cause antibiotic resistance. New radiolabeled agents like antimicrobic peptides, binding to bacterial cell membranes, seem very promising. Thus, the aim of this narrative review is to provide a comprehensive overview about techniques, including PET/MRI, and tracers that can guide the clinicians in the appropriate diagnostic pathway of infectious and inflammatory pulmonary diseases.
Collapse
Affiliation(s)
- Chiara Giraudo
- Department of Medicine-DIMED,Institute of Radiology, University of Padova, 35100 Padova, Italy; (A.S.F.); (A.L.); (E.Q.)
- Correspondence: ; Tel.: +39-049-821-2357; Fax: +39-049-821-1878
| | - Laura Evangelista
- Nuclear Medicine Unit, Department of Medicine-DIMED, University of Padova, 35128 Padova, Italy; (L.E.); (D.C.)
| | - Anna Sara Fraia
- Department of Medicine-DIMED,Institute of Radiology, University of Padova, 35100 Padova, Italy; (A.S.F.); (A.L.); (E.Q.)
| | - Amalia Lupi
- Department of Medicine-DIMED,Institute of Radiology, University of Padova, 35100 Padova, Italy; (A.S.F.); (A.L.); (E.Q.)
| | - Emilio Quaia
- Department of Medicine-DIMED,Institute of Radiology, University of Padova, 35100 Padova, Italy; (A.S.F.); (A.L.); (E.Q.)
| | - Diego Cecchin
- Nuclear Medicine Unit, Department of Medicine-DIMED, University of Padova, 35128 Padova, Italy; (L.E.); (D.C.)
- Padova Neuroscience Center (PNC), University of Padova, 35131 Padova, Italy
| | - Massimiliano Casali
- Azienda Unità Sanitaria Locale–IRCCS di Reggio Emilia, 42121 Reggio Emilia, Italy;
| |
Collapse
|
5
|
Torres L, Kammerman J, Hahn AD, Zha W, Nagle SK, Johnson K, Sandbo N, Meyer K, Schiebler M, Fain SB. "Structure-Function Imaging of Lung Disease Using Ultrashort Echo Time MRI". Acad Radiol 2019; 26:431-441. [PMID: 30658930 DOI: 10.1016/j.acra.2018.12.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 12/19/2018] [Accepted: 12/21/2018] [Indexed: 12/14/2022]
Abstract
RATIONALE AND OBJECTIVES The purpose of this review is to acquaint the reader with recent advances in ultrashort echo time (UTE) magnetic resonance imaging (MRI) of the lung and its implications for pulmonary MRI when used in conjunction with functional MRI technique. MATERIALS AND METHODS We provide an overview of recent technical advances of UTE and explore the advantages of combined structure-function pulmonary imaging in the context of restrictive and obstructive pulmonary diseases such as idiopathic pulmonary fibrosis (IPF) and cystic fibrosis (CF). RESULTS UTE MRI clearly shows the lung parenchymal changes due to IPF and CF. The use of UTE MRI, in conjunction with established functional lung MRI in chronic lung diseases, will serve to mitigate the need for computed tomography in children. CONCLUSION Current limitations of UTE MRI include long scan times, poor delineation of thin-walled structures (e.g. cysts and reticulation) due to limited spatial resolution, low signal to noise ratio, and imperfect motion compensation. Despite these limitations, UTE MRI can now be considered as an alternative to multidetector computed tomography for the longitudinal follow-up of the morphological changes from lung diseases in neonates, children, and young adults, particularly as a complement to the unique functional capabilities of MRI.
Collapse
|
6
|
Bianchi A, Gobbo OL, Dufort S, Sancey L, Lux F, Tillement O, Coll JL, Crémillieux Y. Orotracheal manganese-enhanced MRI (MEMRI): An effective approach for lung tumor detection. NMR IN BIOMEDICINE 2017; 30:e3790. [PMID: 28857310 DOI: 10.1002/nbm.3790] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 07/15/2017] [Accepted: 07/19/2017] [Indexed: 06/07/2023]
Abstract
Lung cancer is a primary cause of cancer deaths worldwide. Timely detection of this pathology is necessary to delay or interrupt lung cancer progression, ultimately resulting in a possible better prognosis for the patient. In this context, magnetic resonance imaging (MRI) is especially promising. Ultra-short echo time (UTE) MRI sequences, in combination with gadolinium-based contrast agents, have indeed shown to be especially adapted to the detection of lung neoplastic lesions at submillimeter precision. Manganese-enhanced MRI (MEMRI) increasingly appears to be a possible effective alternative to gadolinium-enhanced MRI. In this work, we investigated whether low-dose MEMRI can effectively target non-small-cell lung cancer in rodents, whilst minimizing the potential toxic effect of manganese. Both systemic and orotracheal administration modalities allowed the identification of tumors of submillimeter size, as confirmed by bioluminescence imaging and histology. Equivalent tumor signal enhancements and contrast-to-noise ratios were observed with orotracheal administration using 20 times lower doses compared with the more conventional systemic route. This finding is of crucial importance as it supports the observation that higher performances of contrast agents can be obtained using an orotracheal administration route when targeting lung diseases. As a consequence, lower concentrations of contrast media can be employed, reducing the dose and potential safety issues. The non-detectable accumulation of ionic manganese in the brain and liver following orotracheal administration observed in vivo is extremely encouraging with regard to the safety of the orotracheal protocol with low-dose Mn2+ administration. To our knowledge, this is the first time that a study has clearly allowed the high-precision detection of lung tumor and its contours via the synergic employment of a strongly T1 -weighted MRI UTE sequence and ionic manganese, an inexpensive contrast agent. Overall, these results support the growing interest in drug and contrast agent delivery via the airways to target and diagnose several diseases of the lungs.
Collapse
Affiliation(s)
- Andrea Bianchi
- Centre de Résonance Magnétique des Systèmes Biologiques,CNRS UMR 5536, Université Bordeaux, Bordeaux, France
| | - Oliviero L Gobbo
- School of Pharmacy and Pharmaceutical Sciences and Institute of Neuroscience, Trinity College Dublin, Ireland
| | - Sandrine Dufort
- Nano-H S.A.S, Saint Quentin-Fallavier, France
- Institute for Advanced Biosciences, INSERM U1209, CNRS UMR 5309, Université Grenoble Alpes, Grenoble, France
| | - Lucie Sancey
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumiére Matiére, Lyon, France
| | - François Lux
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumiére Matiére, Lyon, France
| | - Olivier Tillement
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumiére Matiére, Lyon, France
| | - Jean-Luc Coll
- Institute for Advanced Biosciences, INSERM U1209, CNRS UMR 5309, Université Grenoble Alpes, Grenoble, France
| | - Yannick Crémillieux
- Centre de Résonance Magnétique des Systèmes Biologiques,CNRS UMR 5536, Université Bordeaux, Bordeaux, France
| |
Collapse
|
7
|
Al Faraj A, Shaik AS, Halwani R, Alfuraih A. Magnetic Targeting and Delivery of Drug-Loaded SWCNTs Theranostic Nanoprobes to Lung Metastasis in Breast Cancer Animal Model: Noninvasive Monitoring Using Magnetic Resonance Imaging. Mol Imaging Biol 2017; 18:315-24. [PMID: 26486793 DOI: 10.1007/s11307-015-0902-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
PURPOSE In this study, we aimed to develop novel therapeutic and diagnostic approaches by improving the targeting of doxorubicin-loaded single-walled carbon nanotubes (SWCNTs) to metastatic regions, and monitor their preferential homing and enhanced therapeutic effect using noninvasive free-breathing magnetic resonance imaging (MRI) and bioluminescence imaging. PROCEDURES High-energy flexible magnets were specifically positioned over the metastatic tumor sites in the lungs. SWCNTs biodistribution, tumor progression, and subsequent treatment efficiency were assessed following administration of the magnetically attracted doxorubicin-loaded anti-CD105 conjugated nanocarriers. RESULTS The use of high-energy magnets offered improved theranostic effect of doxorubicin-loaded nanocarriers, by magnetically targeting them towards metastatic tumor sites in the lungs. MRI allowed sensitive monitoring of nanocarriers biodistribution in the abdominal organs, their preferential homing towards the metastatic sites, and their enhanced therapeutic effect. CONCLUSIONS Combination of noninvasive MRI to localize sensitively the tumor sites, with specific positioning of magnets that can enhance the magnetic targeting of nanocarriers, allowed increasing the treatment efficiency.
Collapse
Affiliation(s)
- Achraf Al Faraj
- College of Applied Medical Sciences, Department of Radiological Sciences, Molecular and Cellular Imaging Lab, King Saud University, Riyadh, 11433, Saudi Arabia.
| | - Asma Sultana Shaik
- College of Medicine, Prince Naif Health Research Center, King Saud University, Riyadh, 11461, Saudi Arabia
| | - Rabih Halwani
- College of Medicine, Prince Naif Health Research Center, King Saud University, Riyadh, 11461, Saudi Arabia
| | - Abdulrahman Alfuraih
- College of Applied Medical Sciences, Department of Radiological Sciences, Molecular and Cellular Imaging Lab, King Saud University, Riyadh, 11433, Saudi Arabia
| |
Collapse
|
8
|
Guo J, Cao X, Cleveland ZI, Woods JC. Murine pulmonary imaging at 7T: T2* and T 1 with anisotropic UTE. Magn Reson Med 2017; 79:2254-2264. [PMID: 28812309 DOI: 10.1002/mrm.26872] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 07/18/2017] [Accepted: 07/25/2017] [Indexed: 12/12/2022]
Abstract
PURPOSE To measure the T2* and T1 of mouse lung at 7T via anisotropic-resolution radial ultrashort echo-time imaging with ellipsoidal k-space coverage. METHODS Ellipsoidal field-of-view was created by expanding uniform spherical k-space coverage. The effects of T2* and ellipsoidal sampling on image resolution were investigated by using point-spread-function analysis and resolution phantoms. Finally, this ellipsoidal sampling approach was used to measure the lung T2* and T1 of healthy C57BL/6 mice at the increasingly common preclinical field strength of 7T. RESULTS Lung parenchyma T2* of 17- to 23-week-old mice at 7T was 0.395 ± 0.033 ms. T1 of lung and left- and right-heart ventricles was 1452.5 ± 87.0 ms, 1810.5 ± 54.6 ms, and 1602.6 ± 120.9 ms, respectively. Ellipsoidal k-space sampling provides enhanced resolution for a fixed scanning time or provides equivalent (although anisotropic) spatial resolution with reduced scanning times, while simultaneously avoiding fold-in artifacts. CONCLUSION Using these techniques, the first T2* and T1 measures of mouse lung at 7T are reported. Ultrashort echo-time imaging with ellipsoidal k-space coverage significantly increases in-plane resolution without increasing scanning time, or equivalently, decreases scanning time while maintaining equivalent in-plane resolution. Magn Reson Med 79:2254-2264, 2018. © 2017 International Society for Magnetic Resonance in Medicine.
Collapse
Affiliation(s)
- Jinbang Guo
- Center for Pulmonary Imaging Research, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,Department of Physics, Washington University in St. Louis, St. Louis, Missouri, USA
| | - Xuefeng Cao
- Center for Pulmonary Imaging Research, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,Department of Physics, University of Cincinnati, Cincinnati, Ohio, USA
| | - Zackary I Cleveland
- Center for Pulmonary Imaging Research, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Jason C Woods
- Center for Pulmonary Imaging Research, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,Department of Physics, Washington University in St. Louis, St. Louis, Missouri, USA.,Department of Physics, University of Cincinnati, Cincinnati, Ohio, USA
| |
Collapse
|
9
|
Ruscitti F, Ravanetti F, Essers J, Ridwan Y, Belenkov S, Vos W, Ferreira F, KleinJan A, van Heijningen P, Van Holsbeke C, Cacchioli A, Villetti G, Stellari FF. Longitudinal assessment of bleomycin-induced lung fibrosis by Micro-CT correlates with histological evaluation in mice. Multidiscip Respir Med 2017; 12:8. [PMID: 28400960 PMCID: PMC5387277 DOI: 10.1186/s40248-017-0089-0] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Accepted: 03/10/2017] [Indexed: 01/15/2023] Open
Abstract
Background The intratracheal instillation of bleomycin in mice induces early damage to alveolar epithelial cells and development of inflammation followed by fibrotic tissue changes and represents the most widely used model of pulmonary fibrosis to investigate human IPF. Histopathology is the gold standard for assessing lung fibrosis in rodents, however it precludes repeated and longitudinal measurements of disease progression and does not provide information on spatial and temporal distribution of tissue damage. Here we investigated the use of the Micro-CT technique to allow the evaluation of disease onset and progression at different time-points in the mouse bleomycin model of lung fibrosis. Micro-CT was throughout coupled with histological analysis for the validation of the imaging results. Methods In bleomycin-instilled and control mice, airways and lung morphology changes were assessed and reconstructed at baseline, 7, 14 and 21 days post-treatment based on Micro-CT images. Ashcroft score, percentage of collagen content and percentage of alveolar air area were detected on lung slides processed by histology and subsequently compared with Micro-CT parameters. Results Extent (%) of fibrosis measured by Micro-CT correlated with Ashcroft score, the percentage of collagen content and the percentage of alveolar air area (r2 = 0.91; 0.77; 0.94, respectively). Distal airway radius also correlated with the Ashcroft score, the collagen content and alveolar air area percentage (r2 = 0.89; 0.78; 0.98, respectively). Conclusions Micro-CT data were in good agreement with histological read-outs as micro-CT was able to quantify effectively and non-invasively disease progression longitudinally and to reduce the variability and number of animals used to assess the damage. This suggests that this technique is a powerful tool for understanding experimental pulmonary fibrosis and that its use could translate into a more efficient drug discovery process, also helping to fill the gap between preclinical setting and clinical practice.
Collapse
Affiliation(s)
| | - Francesca Ravanetti
- Dipartimento di Scienze Medico Veterinarie, Università di Parma, Parma, Italy
| | - Jeroen Essers
- Department of Molecular Genetics, Vascular Surgery, and Radiation Oncology, Erasmus MC, Rotterdam, The Netherlands
| | - Yanto Ridwan
- Department of Molecular Genetics, Vascular Surgery, and Radiation Oncology, Erasmus MC, Rotterdam, The Netherlands
| | | | - Wim Vos
- Fluidda NV, Kontich, Belgium
| | | | - Alex KleinJan
- Department of Pulmonary Medicine Erasmus MC, Rotterdam, The Netherlands
| | - Paula van Heijningen
- Department of Molecular Genetics, Vascular Surgery, and Radiation Oncology, Erasmus MC, Rotterdam, The Netherlands
| | | | - Antonio Cacchioli
- Dipartimento di Scienze Medico Veterinarie, Università di Parma, Parma, Italy
| | | | - Franco Fabio Stellari
- Chiesi S.p.A., Pre-Clinical R & D, Parma, Italy.,Chiesi Farmaceutici, Pharmacology & Toxicology Department Corporate Pre-Clinical R & D, Largo Belloli, 11/A, Parma, 43122 Italy
| |
Collapse
|
10
|
DeBoer EM, Spielberg DR, Brody AS. Clinical potential for imaging in patients with asthma and other lung disorders. J Allergy Clin Immunol 2016; 139:21-28. [PMID: 27871877 DOI: 10.1016/j.jaci.2016.11.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 11/10/2016] [Accepted: 11/10/2016] [Indexed: 12/12/2022]
Abstract
The ability of lung imaging to phenotype patients, determine prognosis, and predict response to treatment is expanding in clinical and translational research. The purpose of this perspective is to describe current imaging modalities that might be useful clinical tools in patients with asthma and other lung disorders and to explore some of the new developments in imaging modalities of the lung. These imaging modalities include chest radiography, computed tomography, lung magnetic resonance imaging, electrical impedance tomography, bronchoscopy, and others.
Collapse
Affiliation(s)
- Emily M DeBoer
- University of Colorado Anschutz Medical Campus, Department of Pediatrics, and Breathing Institute, Children's Hospital Colorado, Aurora, Colo.
| | - David R Spielberg
- Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Alan S Brody
- Department of Radiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| |
Collapse
|
11
|
Lilburn DML, Tatler AL, Six JS, Lesbats C, Habgood A, Porte J, Hughes-Riley T, Shaw DE, Jenkins G, Meersmann T. Investigating lung responses with functional hyperpolarized xenon-129 MRI in an ex vivo rat model of asthma. Magn Reson Med 2016; 76:1224-35. [PMID: 26507239 PMCID: PMC5026173 DOI: 10.1002/mrm.26003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 08/26/2015] [Accepted: 09/08/2015] [Indexed: 01/08/2023]
Abstract
PURPOSE Asthma is a disease of increasing worldwide importance that calls for new investigative methods. Ex vivo lung tissue is being increasingly used to study functional respiratory parameters independent of confounding systemic considerations but also to reduce animal numbers and associated research costs. In this work, a straightforward laboratory method is advanced to probe dynamic changes in gas inhalation patterns by using an ex vivo small animal ovalbumin (OVA) model of human asthma. METHODS Hyperpolarized (hp) (129) Xe was actively inhaled by the excised lungs exposed to a constant pressure differential that mimicked negative pleural cavity pressure. The method enabled hp (129) Xe MRI of airway responsiveness to intravenous methacholine (MCh) and airway challenge reversal through salbutamol. RESULTS Significant differences were demonstrated between control and OVA challenged animals on global lung hp (129) Xe gas inhalation with P < 0.05 at MCh dosages above 460 μg. Spatial mapping of the regional hp gas distribution revealed an approximately three-fold increase in heterogeneity for the asthma model organs. CONCLUSION The experimental results from this proof of concept work suggest that the ex vivo hp noble gas imaging arrangement and the applied image analysis methodology may be useful as an adjunct to current diagnostic techniques. Magn Reson Med 76:1224-1235, 2016. © 2015 The Authors. Magnetic Resonance in Medicine published by Wiley Periodicals, Inc. on behalf of International Society for Magnetic Resonance in Medicine. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Collapse
Affiliation(s)
- David M L Lilburn
- Sir Peter Mansfield Imaging Centre, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Amanda L Tatler
- Division of Respiratory Medicine, Nottingham University Hospitals, City Campus, University of Nottingham, Nottingham, United Kingdom
| | - Joseph S Six
- Sir Peter Mansfield Imaging Centre, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Clémentine Lesbats
- Sir Peter Mansfield Imaging Centre, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Anthony Habgood
- Division of Respiratory Medicine, Nottingham University Hospitals, City Campus, University of Nottingham, Nottingham, United Kingdom
| | - Joanne Porte
- Division of Respiratory Medicine, Nottingham University Hospitals, City Campus, University of Nottingham, Nottingham, United Kingdom
| | - Theodore Hughes-Riley
- Sir Peter Mansfield Imaging Centre, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Dominick E Shaw
- Division of Respiratory Medicine, Nottingham University Hospitals, City Campus, University of Nottingham, Nottingham, United Kingdom
| | - Gisli Jenkins
- Division of Respiratory Medicine, Nottingham University Hospitals, City Campus, University of Nottingham, Nottingham, United Kingdom
| | - Thomas Meersmann
- Sir Peter Mansfield Imaging Centre, School of Medicine, University of Nottingham, Nottingham, United Kingdom.
| |
Collapse
|
12
|
Stellari F, Bergamini G, Ruscitti F, Sandri A, Ravanetti F, Donofrio G, Boschi F, Villetti G, Sorio C, Assael BM, Melotti P, Lleo MM. In vivo monitoring of lung inflammation in CFTR-deficient mice. J Transl Med 2016; 14:226. [PMID: 27468800 PMCID: PMC4964274 DOI: 10.1186/s12967-016-0976-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 07/13/2016] [Indexed: 12/14/2022] Open
Abstract
Background Experimentally, lung inflammation in laboratory animals is usually detected by the presence of inflammatory markers, such as immune cells and cytokines, in the bronchoalveolar lavage fluid (BALF) of sacrificed animals. This method, although extensively used, is time, money and animal life consuming, especially when applied to genetically modified animals. Thus a new and more convenient approach, based on in vivo imaging analysis, has been set up to evaluate the inflammatory response in the lung of CFTR-deficient (CF) mice, a murine model of cystic fibrosis. Methods Wild type (WT) and CF mice were stimulated with P. aeruginosa LPS, TNF-alpha and culture supernatant derived from P. aeruginosa (strain VR1). Lung inflammation was detected by measuring bioluminescence in vivo in mice transiently transgenized with a luciferase reporter gene under the control of a bovine IL-8 gene promoter. Results Differences in bioluminescence (BLI) signal were revealed by comparing the two types of mice after intratracheal challenge with pro-inflammatory stimuli. BLI increased at 4 h after stimulation with TNF-alpha and at 24 h after administration of LPS and VR1 supernatant in CF mice with respect to untreated animals. The BLI signal was significantly more intense and lasted for longer times in CF animals when compared to WT mice. Analysis of BALF markers: leukocytes, cytokines and histology revealed no significant differences between CF and WT mice. Conclusions In vivo gene delivery technology and non-invasive bioluminescent imaging has been successfully adapted to CFTR-deficient mice. Activation of bIL-8 transgene promoter can be monitored by non-invasive BLI imaging in the lung of the same animal and compared longitudinally in both CF or WT mice, after challenge with pro-inflammatory stimuli. The combination of these technologies and the use of CF mice offer the unique opportunity of evaluating the impact of therapies aimed to control inflammation in a CF background. Electronic supplementary material The online version of this article (doi:10.1186/s12967-016-0976-8) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Fabio Stellari
- Pharmacology & Toxicology Department Corporate Pre-Clinical R&D, Chiesi Farmaceutici, Largo Belloli, 11/A, 43122, Parma, Italy.
| | | | - Francesca Ruscitti
- Dipartimento di Scienze Biomediche, Biotecnologiche e Traslazionali, Università di Parma, Parma, Italy
| | - Angela Sandri
- Dipartimento di Diagnostica e Salute Pubblica, Università di Verona, Verona, Italy
| | - Francesca Ravanetti
- Dipartimento di Scienze Medico Veterinarie, Università di Parma, Parma, Italy
| | - Gaetano Donofrio
- Dipartimento di Scienze Medico Veterinarie, Università di Parma, Parma, Italy
| | - Federico Boschi
- Dipartimento di Informatica, Università di Verona, Verona, Italy
| | - Gino Villetti
- Pharmacology & Toxicology Department Corporate Pre-Clinical R&D, Chiesi Farmaceutici, Largo Belloli, 11/A, 43122, Parma, Italy
| | - Claudio Sorio
- Dipartimento di Medicina, Università di Verona, Verona, Italy
| | - Barouk M Assael
- Centro Fibrosi Cistica, Azienda Ospedaliera Universitaria Integrata Verona, Verona, Italy
| | - Paola Melotti
- Centro Fibrosi Cistica, Azienda Ospedaliera Universitaria Integrata Verona, Verona, Italy
| | - Maria M Lleo
- Dipartimento di Diagnostica e Salute Pubblica, Università di Verona, Verona, Italy
| |
Collapse
|
13
|
Kruger SJ, Nagle SK, Couch MJ, Ohno Y, Albert M, Fain SB. Functional imaging of the lungs with gas agents. J Magn Reson Imaging 2016; 43:295-315. [PMID: 26218920 PMCID: PMC4733870 DOI: 10.1002/jmri.25002] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 06/26/2015] [Indexed: 12/22/2022] Open
Abstract
This review focuses on the state-of-the-art of the three major classes of gas contrast agents used in magnetic resonance imaging (MRI)-hyperpolarized (HP) gas, molecular oxygen, and fluorinated gas--and their application to clinical pulmonary research. During the past several years there has been accelerated development of pulmonary MRI. This has been driven in part by concerns regarding ionizing radiation using multidetector computed tomography (CT). However, MRI also offers capabilities for fast multispectral and functional imaging using gas agents that are not technically feasible with CT. Recent improvements in gradient performance and radial acquisition methods using ultrashort echo time (UTE) have contributed to advances in these functional pulmonary MRI techniques. The relative strengths and weaknesses of the main functional imaging methods and gas agents are compared and applications to measures of ventilation, diffusion, and gas exchange are presented. Functional lung MRI methods using these gas agents are improving our understanding of a wide range of chronic lung diseases, including chronic obstructive pulmonary disease, asthma, and cystic fibrosis in both adults and children.
Collapse
Affiliation(s)
- Stanley J. Kruger
- Department of Medical Physics, University of Wisconsin – Madison, WI, U.S.A
| | - Scott K. Nagle
- Department of Medical Physics, University of Wisconsin – Madison, WI, U.S.A
- Department of Radiology, University of Wisconsin – Madison, WI, U.S.A
- Department of Pediatrics, University of Wisconsin – Madison, WI, U.S.A
| | - Marcus J. Couch
- Thunder Bay Regional Research Institute, Thunder Bay, ON, Canada
- Biotechnology Program, Lakehead University, Thunder Bay, ON, Canada
| | - Yoshiharu Ohno
- Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Mitchell Albert
- Thunder Bay Regional Research Institute, Thunder Bay, ON, Canada
- Department of Chemistry, Lakehead University, Thunder Bay, ON, Canada
| | - Sean B. Fain
- Department of Medical Physics, University of Wisconsin – Madison, WI, U.S.A
- Department of Radiology, University of Wisconsin – Madison, WI, U.S.A
- Department of Biomedical Engineering, University of Wisconsin – Madison, WI, U.S.A
| |
Collapse
|
14
|
Al Faraj A, Shaik AS, Afzal S, Al-Muhsen S, Halwani R. Specific targeting and noninvasive magnetic resonance imaging of an asthma biomarker in the lung using polyethylene glycol functionalized magnetic nanocarriers. CONTRAST MEDIA & MOLECULAR IMAGING 2015; 11:172-83. [PMID: 26708935 DOI: 10.1002/cmmi.1678] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 11/09/2015] [Accepted: 11/11/2015] [Indexed: 01/01/2023]
Abstract
Simultaneous inhibition of IL4 and IL13 via the common receptor chain IL4Rα to block adequately their biologic effects presents a promising therapeutic approach to give the additional relief required for asthma patients. In this study, superparamagnetic iron oxide nanoparticles were conjugated with anti-IL4Rα blocking antibodies via polyethylene glycol (PEG) polymers. The delivery of these blocking antibodies to the inflammatory sites in the lung via the developed nanocarriers was assessed using noninvasive free-breathing pulmonary MRI. Biocompatibility assays confirmed the safety of the developed nanocarriers for pre-clinical investigations. For all the investigated formulations, nanocarriers were found to be very stable at neutral pH. However, the stability noticeably decreased with the PEG length in acidic environment and thus the loaded antibodies were preferentially released. Immunofluorescence and fluorimetry assays confirmed the binding of the nanocarriers to the IL4Rα asthma biomarker. Pulmonary MRI performed using an ultra-short echo time sequence allowed simultaneous noninvasive monitoring of inflammatory responses induced by ovalbumin challenge and tracking of the developed nanocarriers, which were found to colocalize with the inflammatory sites in the lung. Targeting of the developed nanocarriers to areas rich in IL4Rα positive inflammatory cells was confirmed using histological and flow cytometry analyses. The anti-IL4Rα-conjugated nanocarriers developed here have been confirmed to be efficient in targeting key inflammatory cells during chronic lung inflammation following intrapulmonary administration. Targeting efficiency was monitored using noninvasive MRI, allowing detection of the nanocarriers' colocalizations with the inflammatory sites in the lung of ovalbumin-challenged asthmatic mice. Copyright © 2015 John Wiley & Sons, Ltd.
Collapse
Affiliation(s)
- Achraf Al Faraj
- King Saud University, Department of Radiological Sciences, College of Applied Medical Sciences, Riyadh, Saudi Arabia
| | - Asma Sultana Shaik
- King Saud University, Prince Naif Health Research Center, Riyadh, Saudi Arabia.,King Saud University, Prince Naif Center for Immunology Research and Asthma Research Chair, Department of Pediatrics, College of Medicine, Riyadh, Saudi Arabia
| | - Sibtain Afzal
- King Saud University, Prince Naif Center for Immunology Research and Asthma Research Chair, Department of Pediatrics, College of Medicine, Riyadh, Saudi Arabia
| | - Saleh Al-Muhsen
- King Saud University, Prince Naif Center for Immunology Research and Asthma Research Chair, Department of Pediatrics, College of Medicine, Riyadh, Saudi Arabia
| | - Rabih Halwani
- King Saud University, Prince Naif Center for Immunology Research and Asthma Research Chair, Department of Pediatrics, College of Medicine, Riyadh, Saudi Arabia
| |
Collapse
|
15
|
|
16
|
Bianchi A, Tibiletti M, Kjørstad Å, Birk G, Schad LR, Stierstorfer B, Rasche V, Stiller D. Three-dimensional accurate detection of lung emphysema in rats using ultra-short and zero echo time MRI. NMR IN BIOMEDICINE 2015; 28:1471-1479. [PMID: 26403226 DOI: 10.1002/nbm.3417] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 08/10/2015] [Accepted: 08/26/2015] [Indexed: 06/05/2023]
Abstract
Emphysema is a life-threatening pathology that causes irreversible destruction of alveolar walls. In vivo imaging techniques play a fundamental role in the early non-invasive pre-clinical and clinical detection and longitudinal follow-up of this pathology. In the present study, we aimed to evaluate the feasibility of using high resolution radial three-dimensional (3D) zero echo time (ZTE) and 3D ultra-short echo time (UTE) MRI to accurately detect lung pathomorphological changes in a rodent model of emphysema.Porcine pancreas elastase (PPE) was intratracheally administered to the rats to produce the emphysematous changes. 3D ZTE MRI, low and high definition 3D UTE MRI and micro-computed tomography images were acquired 4 weeks after the PPE challenge. Signal-to-noise ratios (SNRs) were measured in PPE-treated and control rats. T2* values were computed from low definition 3D UTE MRI. Histomorphometric measurements were made after euthanizing the animals. Both ZTE and UTE MR images showed a significant decrease in the SNR measured in PPE-treated lungs compared with controls, due to the pathomorphological changes taking place in the challenged lungs. A significant decrease in T2* values in PPE-challenged animals compared with controls was measured using UTE MRI. Histomorphometric measurements showed a significant increase in the mean linear intercept in PPE-treated lungs. UTE yielded significantly higher SNR compared with ZTE (14% and 30% higher in PPE-treated and non-PPE-treated lungs, respectively).This study showed that optimized 3D radial UTE and ZTE MRI can provide lung images of excellent quality, with high isotropic spatial resolution (400 µm) and SNR in parenchymal tissue (>25) and negligible motion artifacts in freely breathing animals. These techniques were shown to be useful non-invasive instruments to accurately and reliably detect the pathomorphological alterations taking place in emphysematous lungs, without incurring the risks of cumulative radiation exposure typical of micro-computed tomography.
Collapse
Affiliation(s)
- Andrea Bianchi
- Boehringer Ingelheim Pharma GmbH & Co. KG, Target Discovery Research, In-Vivo Imaging Laboratory, Biberach an der Riss, Germany
| | - Marta Tibiletti
- Core Facility Small Animal MRI, Ulm University, Ulm, Germany
| | - Åsmund Kjørstad
- Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
- Department of Neuroradiology, University Hospital Hamburg-Eppendorf, Germany
| | - Gerald Birk
- Boehringer Ingelheim Pharma GmbH & Co. KG, Target Discovery Research, Target Validation Technologies, Biberach an der Riss, Germany
| | - Lothar R Schad
- Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Birgit Stierstorfer
- Boehringer Ingelheim Pharma GmbH & Co. KG, Target Discovery Research, Target Validation Technologies, Biberach an der Riss, Germany
| | - Volker Rasche
- Core Facility Small Animal MRI, Ulm University, Ulm, Germany
- Department of Internal Medicine II, Ulm University, Ulm, Germany
| | - Detlef Stiller
- Boehringer Ingelheim Pharma GmbH & Co. KG, Target Discovery Research, In-Vivo Imaging Laboratory, Biberach an der Riss, Germany
| |
Collapse
|
17
|
Stellari F, Sala A, Ruscitti F, Carnini C, Mirandola P, Vitale M, Civelli M, Villetti G. Monitoring inflammation and airway remodeling by fluorescence molecular tomography in a chronic asthma model. J Transl Med 2015; 13:336. [PMID: 26496719 PMCID: PMC4619338 DOI: 10.1186/s12967-015-0696-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 10/13/2015] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Asthma is a multifactorial disease for which a variety of mouse models have been developed. A major drawback of these models is represented by the transient nature of the airway pathology peaking 24-72 h after challenge and resolving in 1-2 weeks. We characterized the temporal evolution of pulmonary inflammation and tissue remodeling in a recently described mouse model of chronic asthma (8 week treatment with 3 allergens: Dust mite, Ragweed, and Aspergillus; DRA). METHODS We studied the DRA model taking advantage of fluorescence molecular tomography (FMT) imaging using near-infrared probes to non-invasively evaluate lung inflammation and airway remodeling. At 4, 6, 8 or 11 weeks, cathepsin- and metalloproteinase-dependent fluorescence was evaluated in vivo. A subgroup of animals, after 4 weeks of DRA, was treated with Budesonide (100 µg/kg intranasally) daily for 4 weeks. RESULTS Cathepsin-dependent fluorescence in DRA-sensitized mice resulted significantly increased at 6 and 8 weeks, and was markedly inhibited by budesonide. This fluorescent signal well correlated with ex vivo analysis such as bronchoalveolar lavage eosinophils and pulmonary inflammatory cell infiltration. Metalloproteinase-dependent fluorescence was significantly increased at 8 and 11 weeks, nicely correlated with collagen deposition, as evaluated histologically by Masson's Trichrome staining, and airway epithelium hypertrophy, and was only partly inhibited by budesonide. CONCLUSIONS FMT proved suitable for longitudinal studies to evaluate asthma progression, showing that cathepsin activity could be used to monitor inflammatory cell infiltration while metalloproteinase activity parallels airway remodeling, allowing the determination of steroid treatment efficacy in a chronic asthma model in mice.
Collapse
Affiliation(s)
| | - Angelo Sala
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Via Balzaretti 9, 20133, Milan, Italy. .,IBIM, Consiglio Nazionale delle Ricerche, Palermo, Italy.
| | - Francesca Ruscitti
- Dipartimento di Scienze Biomediche, Biotecnologiche e Traslazionali, Università di Parma, Parma, Italy.
| | | | - Prisco Mirandola
- Dipartimento di Scienze Biomediche, Biotecnologiche e Traslazionali, Università di Parma, Parma, Italy.
| | - Marco Vitale
- Dipartimento di Scienze Biomediche, Biotecnologiche e Traslazionali, Università di Parma, Parma, Italy.
| | | | | |
Collapse
|
18
|
Bianchi A, Moncelet D, Lux F, Plissonneau M, Rizzitelli S, Ribot EJ, Tassali N, Bouchaud V, Tillement O, Voisin P, Crémillieux Y. Orotracheal administration of contrast agents: a new protocol for brain tumor targeting. NMR IN BIOMEDICINE 2015; 28:738-746. [PMID: 25921808 DOI: 10.1002/nbm.3295] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 02/17/2015] [Accepted: 03/07/2015] [Indexed: 06/04/2023]
Abstract
The development of new non-invasive diagnostic and therapeutic approaches is of paramount importance in order to improve the outcome of patients with glioblastoma (GBM). In this work we investigated a completely non-invasive pre-clinical protocol to effectively target and detect brain tumors through the orotracheal route, using ultra-small nanoparticles (USRPs) and MRI. A mouse model of GBM was developed. In vivo MRI acquisitions were performed before and after intravenous or orotracheal administration of the nanoparticles to identify and segment the tumor. The accumulation of the nanoparticles in neoplastic lesions was assessed ex vivo through fluorescence microscopy. Before the administration of contrast agents, MR images allowed the identification of the presence of abnormal brain tissue in 73% of animals. After orotracheal or intravenous administration of USRPs, in all the mice an excellent co-localization of the position of the tumor with MRI and histology was observed. The elimination time of the USRPs from the tumor after the orotracheal administration was approximately 70% longer compared with intravenous injection. MRI and USRPs were shown to be powerful imaging tools able to detect, quantify and longitudinally monitor the development of GBMs. The absence of ionizing radiation and high resolution of MRI, along with the complete non-invasiveness and good reproducibility of the proposed protocol, make this technique potentially translatable to humans. To our knowledge, this is the first time that the advantages of a needle-free orotracheal administration route have been demonstrated for the investigation of the pathomorphological changes due to GBMs.
Collapse
Affiliation(s)
- Andrea Bianchi
- Centre de Résonance Magnétique des Systèmes Biologiques, CNRS UMR 5536, Université Bordeaux Segalen, Bordeaux, France
| | - Damien Moncelet
- Centre de Résonance Magnétique des Systèmes Biologiques, CNRS UMR 5536, Université Bordeaux Segalen, Bordeaux, France
| | - François Lux
- Institut Lumière Matière, CNRS UMR 5306, Université Claude Bernard, Domaine Scientifique de La Doua, Villeurbanne, France
| | - Marie Plissonneau
- Institut Lumière Matière, CNRS UMR 5306, Université Claude Bernard, Domaine Scientifique de La Doua, Villeurbanne, France
- Nano-H SAS, Saint-Quentin Fallavier, France
| | - Silvia Rizzitelli
- Centre de Résonance Magnétique des Systèmes Biologiques, CNRS UMR 5536, Université Bordeaux Segalen, Bordeaux, France
| | - Emeline Julie Ribot
- Centre de Résonance Magnétique des Systèmes Biologiques, CNRS UMR 5536, Université Bordeaux Segalen, Bordeaux, France
| | - Nawal Tassali
- Centre de Résonance Magnétique des Systèmes Biologiques, CNRS UMR 5536, Université Bordeaux Segalen, Bordeaux, France
| | - Véronique Bouchaud
- Centre de Résonance Magnétique des Systèmes Biologiques, CNRS UMR 5536, Université Bordeaux Segalen, Bordeaux, France
| | - Olivier Tillement
- Institut Lumière Matière, CNRS UMR 5306, Université Claude Bernard, Domaine Scientifique de La Doua, Villeurbanne, France
| | - Pierre Voisin
- Centre de Résonance Magnétique des Systèmes Biologiques, CNRS UMR 5536, Université Bordeaux Segalen, Bordeaux, France
| | - Yannick Crémillieux
- Centre de Résonance Magnétique des Systèmes Biologiques, CNRS UMR 5536, Université Bordeaux Segalen, Bordeaux, France
| |
Collapse
|
19
|
Al Faraj A, Shaik AS, Alnafea M. Intrapulmonary administration of bone-marrow derived M1/M2 macrophages to enhance the resolution of LPS-induced lung inflammation: noninvasive monitoring using free-breathing MR and CT imaging protocols. BMC Med Imaging 2015; 15:16. [PMID: 25986463 PMCID: PMC4449577 DOI: 10.1186/s12880-015-0059-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 05/13/2015] [Indexed: 01/24/2023] Open
Abstract
Background Alveolar macrophages, with their high functional plasticity, were reported to orchestrate the induction and resolution of inflammatory processes in chronic pulmonary diseases. Noninvasive imaging modalities that offer simultaneous monitoring of inflammation progression and tracking of macrophages subpopulations involved in the inflammatory cascade, can provide an ideal and specific diagnostic tool to visualize the action mechanism in its initial stages. Therefore, the purpose of the current study was to evaluate the role of M1 and M2 macrophages in the resolution of lipopolysaccharide (LPS)-induced lung inflammation and monitor this process using noninvasive free-breathing MRI and CT protocols. Methods Bone-marrow derived macrophages were first polarized to M1 and M2 macrophages and then labeled with superparamagnetic iron oxide nanoparticles. BALB/c mice with lung inflammation received an intrapulmonary instillation of these ex vivo polarized M1 or M2 macrophages. The biodistribution of macrophages subpopulations and the subsequent resolution of lung inflammation were noninvasively monitored using MRI and micro-CT. Confirmatory immunohistochemistry analyses were performed on lung tissue sections using specific macrophage markers. Results As expected, large inflammatory areas noninvasively imaged using pulmonary MR and micro-CT were observed within the lungs following LPS challenge. Subsequent intrapulmonary administration of M1 and M2 macrophages resulted in a significant decrease in inflammation starting from 72 h. Confirmatory immunohistochemistry analyses established a progression of lung inflammation with LPS and its subsequent reduction with both macrophages subsets. An enhanced resolution of inflammation was observed with M2 macrophages compared to M1. Conclusions The current study demonstrated that ex vivo polarized macrophages decreased LPS-induced lung inflammation. Noninvasive free-breathing MR and CT imaging protocols enabled efficient monitoring of progression and resolution of lung inflammation.
Collapse
Affiliation(s)
- Achraf Al Faraj
- Molecular & Cellular Imaging Lab, Department of Radiological Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, 11433, Saudi Arabia.
| | - Asma Sultana Shaik
- Prince Naif Health Research Center, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
| | - Mohammed Alnafea
- Molecular & Cellular Imaging Lab, Department of Radiological Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, 11433, Saudi Arabia.
| |
Collapse
|
20
|
Tibiletti M, Paul J, Bianchi A, Wundrak S, Rottbauer W, Stiller D, Rasche V. Multistage three-dimensional UTE lung imaging by image-based self-gating. Magn Reson Med 2015; 75:1324-32. [PMID: 25940111 DOI: 10.1002/mrm.25673] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 02/06/2015] [Accepted: 02/06/2015] [Indexed: 01/06/2023]
Abstract
PURPOSE To combine image-based self-gating (img-SG) with ultrashort echo time (UTE) three-dimensional (3D) acquisition for multistage lung imaging during free breathing. METHODS Three k-space ordering schemes (modified spiral pattern, quasirandom numbers and multidimensional Golden Angle) providing uniform coverage of k-space were investigated for providing low-resolution sliding-window images for image-based respiratory self-gating. The performance of the proposed techniques were compared with the conventional spiral pattern and standard DC-based self-gated methods in volunteers during free breathing. RESULTS Navigator-like respiratory signals were successfully extracted from the sliding-window data by monitoring the lung-liver interface displacement. A temporal resolution of 588 ms was adequate to retrieve gating signals from the lung-liver interface. Images reconstructed with the img-SG technique showed significantly better sharpness and apparent diaphragm excursion than any of the DC-SG methods. Direct comparison of the three implemented ordering schemes did not demonstrate any clear superiority of one with respect to the others. CONCLUSION Image-based respiratory self gating in UTE 3D lung images allows successful retrospective respiratory gating, also enabling reconstruction of intermediate respiratory stages.
Collapse
Affiliation(s)
- Marta Tibiletti
- Core Facility Small Animal Imaging, Medical Faculty, Ulm University, Ulm, Germany
| | - Jan Paul
- Department of Internal Medicine II, Ulm University, Ulm, Germany
| | - Andrea Bianchi
- Boehringer Ingelheim Pharma GmbH & Co. KG, Target Discovery Research, In-vivo Imaging Laboratory, Biberach an der Riss, Germany
| | - Stefan Wundrak
- Department of Internal Medicine II, Ulm University, Ulm, Germany
| | | | - Detlef Stiller
- Boehringer Ingelheim Pharma GmbH & Co. KG, Target Discovery Research, In-vivo Imaging Laboratory, Biberach an der Riss, Germany
| | - Volker Rasche
- Core Facility Small Animal Imaging, Medical Faculty, Ulm University, Ulm, Germany.,Department of Internal Medicine II, Ulm University, Ulm, Germany
| |
Collapse
|
21
|
Egger C, Cannet C, Gérard C, Dunbar A, Tigani B, Beckmann N. Hyaluronidase modulates bleomycin-induced lung injury detected noninvasively in small rodents by radial proton MRI. J Magn Reson Imaging 2015; 41:755-764. [DOI: 10.1002/jmri.24612] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
Affiliation(s)
- Christine Egger
- Novartis Institutes for BioMedical Research; Analytical Sciences and Imaging; Basel Switzerland
- University of Basel; Biocenter; Basel Switzerland
| | - Catherine Cannet
- Novartis Institutes for BioMedical Research; Analytical Sciences and Imaging; Basel Switzerland
| | - Christelle Gérard
- Novartis Institutes for BioMedical Research; Analytical Sciences and Imaging; Basel Switzerland
| | - Andrew Dunbar
- Novartis Institutes for BioMedical Research; Analytical Sciences and Imaging; Basel Switzerland
| | - Bruno Tigani
- Novartis Institutes for BioMedical Research; Analytical Sciences and Imaging; Basel Switzerland
| | - Nicolau Beckmann
- Novartis Institutes for BioMedical Research; Analytical Sciences and Imaging; Basel Switzerland
| |
Collapse
|
22
|
Bianchi A, Dufort S, Fortin PY, Lux F, Raffard G, Tassali N, Tillement O, Coll JL, Crémillieux Y. In vivo MRI for effective non-invasive detection and follow-up of an orthotopic mouse model of lung cancer. NMR IN BIOMEDICINE 2014; 27:971-979. [PMID: 24913958 DOI: 10.1002/nbm.3142] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 04/24/2014] [Accepted: 04/25/2014] [Indexed: 06/03/2023]
Abstract
One of the main reasons for the dismal prognosis of lung cancer is related to the late diagnosis of this pathology. In this study, we evaluated the potential of optimized lung MRI techniques as a completely non-invasive approach for non-small-cell lung cancer (NSCLC) MRI in vivo detection and follow-up in a mouse model of lung adenocarcinoma expressing the luciferase gene. Bioluminescent lung tumour cells were orthotopically implanted in immuno-deficient mice. Ultra-short echo-time (UTE) MRI free-breathing acquisitions were compared with standard gradient-echo lung MRI (FLASH) using both respiratory-gated and free-breathing protocols. The MRI findings were validated against bioluminescence imaging (BLI) and gold-standard histopathology analysis. Adenocarcinoma-like pathological tissue was successfully identified in all the mice with gated-FLASH and non-gated UTE MRI, and good tumour co-localization was found between MRI, BLI and histological analyses. An excellent or good correlation was found between the measured bioluminescent signal and the total tumour volumes quantified with UTE MRI or gated-FLASH MRI, respectively. No significant correlation was found when the tumours were segmented on non-gated MR FLASH images. MRI was shown to be a powerful imaging tool able to detect, quantify and longitudinally monitor the development of sub-millimetric NSCLCs. To our knowledge, this is the first study which proves the feasibility of a completely non-invasive MRI quantitative detection of lung adenocarcinoma in freely breathing mice. The absence of ionizing radiation and the high-resolution of MRI, along with the complete non-invasiveness and good reproducibility of the proposed non-gated protocol, make this imaging tool ideal for direct translational applications.
Collapse
Affiliation(s)
- Andrea Bianchi
- Centre de Résonance Magnétique des Systèmes Biologiques, CNRS UMR 5536, Université Bordeaux Segalen, 146, rue Léo Saignat, Bordeaux, France
| | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Ma W, Sheikh K, Svenningsen S, Pike D, Guo F, Etemad-Rezai R, Leipsic J, Coxson HO, McCormack DG, Parraga G. Ultra-short echo-time pulmonary MRI: Evaluation and reproducibility in COPD subjects with and without bronchiectasis. J Magn Reson Imaging 2014; 41:1465-74. [DOI: 10.1002/jmri.24680] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Accepted: 05/27/2014] [Indexed: 01/05/2023] Open
Affiliation(s)
- Weijing Ma
- Imaging Research Laboratories; Robarts Research Institute, The University of Western Ontario; London Canada
| | - Khadija Sheikh
- Imaging Research Laboratories; Robarts Research Institute, The University of Western Ontario; London Canada
- Department of Medical Biophysics; The University of Western Ontario; London Canada
| | - Sarah Svenningsen
- Imaging Research Laboratories; Robarts Research Institute, The University of Western Ontario; London Canada
- Department of Medical Biophysics; The University of Western Ontario; London Canada
| | - Damien Pike
- Imaging Research Laboratories; Robarts Research Institute, The University of Western Ontario; London Canada
- Department of Medical Biophysics; The University of Western Ontario; London Canada
| | - Fumin Guo
- Imaging Research Laboratories; Robarts Research Institute, The University of Western Ontario; London Canada
- Graduate Program in Biomedical Engineering; The University of Western Ontario; London Canada
| | - Roya Etemad-Rezai
- Department of Medical Imaging; The University of Western Ontario; London Canada
| | - Jonathan Leipsic
- Department of Radiology and James Hogg Research Centre; University of British Columbia and Vancouver General Hospital; Vancouver Canada
| | - Harvey O. Coxson
- Department of Radiology and James Hogg Research Centre; University of British Columbia and Vancouver General Hospital; Vancouver Canada
| | - David G. McCormack
- Division of Respirology, Department of Medicine; The University of Western Ontario; London Canada
| | - Grace Parraga
- Imaging Research Laboratories; Robarts Research Institute, The University of Western Ontario; London Canada
- Department of Medical Biophysics; The University of Western Ontario; London Canada
- Graduate Program in Biomedical Engineering; The University of Western Ontario; London Canada
- Department of Medical Imaging; The University of Western Ontario; London Canada
| |
Collapse
|
24
|
Guo J, Huang HJ, Wang X, Wang W, Ellison H, Thomen RP, Gelman AE, Woods JC. Imaging mouse lung allograft rejection with (1)H MRI. Magn Reson Med 2014; 73:1970-8. [PMID: 24954886 DOI: 10.1002/mrm.25313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Revised: 05/05/2014] [Accepted: 05/18/2014] [Indexed: 12/24/2022]
Abstract
PURPOSE To demonstrate that longitudinal, noninvasive monitoring via MRI can characterize acute cellular rejection in mouse orthotopic lung allografts. METHODS Nineteen Balb/c donor to C57BL/6 recipient orthotopic left lung transplants were performed, further divided into control-Ig versus anti-CD4/anti-CD8 treated groups. A two-dimensional multislice gradient-echo pulse sequence synchronized with ventilation was used on a small-animal MR scanner to acquire proton images of lung at postoperative days 3, 7, and 14, just before sacrifice. Lung volume and parenchymal signal were measured, and lung compliance was calculated as volume change per pressure difference between high and low pressures. RESULTS Normalized parenchymal signal in the control-Ig allograft increased over time, with statistical significance between day 14 and day 3 posttransplantation (0.046→0.789; P < 0.05), despite large intermouse variations; this was consistent with histopathologic evidence of rejection. Compliance of the control-Ig allograft decreased significantly over time (0.013→0.003; P < 0.05), but remained constant in mice treated with anti-CD4/anti-CD8 antibodies. CONCLUSION Lung allograft rejection in individual mice can be monitored by lung parenchymal signal changes and by lung compliance through MRI. Longitudinal imaging can help us better understand the time course of individual lung allograft rejection and response to treatment.
Collapse
Affiliation(s)
- Jinbang Guo
- Center for Pulmonary Imaging Research, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA; Department of Physics, Washington University in St. Louis, St. Louis, Missouri, USA
| | | | | | | | | | | | | | | |
Collapse
|
25
|
Pennati F, Quirk JD, Yablonskiy DA, Castro M, Aliverti A, Woods JC. Assessment of regional lung function with multivolume (1)H MR imaging in health and obstructive lung disease: comparison with (3)He MR imaging. Radiology 2014; 273:580-90. [PMID: 24937692 DOI: 10.1148/radiol.14132470] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
PURPOSE To introduce a method based on multivolume proton (hydrogen [(1)H]) magnetic resonance (MR) imaging for the regional assessment of lung ventilatory function, investigating its use in healthy volunteers and patients with obstructive lung disease and comparing the outcome with the outcome of the research standard helium 3 ((3)He) MR imaging. MATERIALS AND METHODS The institutional review board approved the HIPAA-compliant protocol, and informed written consent was obtained from each subject. Twenty-six subjects, including healthy volunteers (n = 6) and patients with severe asthma (n = 11) and mild (n = 6) and severe (n = 3) emphysema, were imaged with a 1.5-T whole-body MR unit at four lung volumes (residual volume [ RV residual volume ], functional residual capacity [ FRC functional residual capacity ], 1 L above FRC functional residual capacity [ FRC+1 L 1 L above FRC ], total lung capacity [ TLC total lung capacity ]) with breath holds of 10-11 seconds, by using volumetric interpolated breath-hold examination. Each pair of volumes were registered, resulting in maps of (1)H signal change between the two lung volumes. (3)He MR imaging was performed at FRC+1 L 1 L above FRC by using a two-dimensional gradient-echo sequence. (1)H signal change and (3)He signal were measured and compared in corresponding regions of interest selected in ventral, intermediate, and dorsal areas. RESULTS In all volunteers and patients combined, proton signal difference between TLC total lung capacity and RV residual volume correlated positively with (3)He signal (correlation coefficient R(2) = 0.64, P < .001). Lower (P < .001) but positive correlation results from (1)H signal difference between FRC functional residual capacity and FRC+1 L 1 L above FRC (R(2) = 0.44, P < .001). In healthy volunteers, (1)H signal changes show a higher median and interquartile range compared with patients with obstructive disease and significant differences between nondependent and dependent regions. CONCLUSION Findings in this study demonstrate that multivolume (1)H MR imaging, without contrast material, can be used as a biomarker for regional ventilation, both in healthy volunteers and patients with obstructive lung disease.
Collapse
Affiliation(s)
- Francesca Pennati
- From the Department of Electronics, Information, and Bioengineering, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milan, Italy (F.P., A.A.); Mallinckrodt Institute of Radiology (J.D.Q., D.A.Y.), Department of Internal Medicine (M.C.), and Department of Physics (J.C.W.), Washington University School of Medicine, St Louis, Mo; and Center for Pulmonary Imaging Research, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio (J.C.W.)
| | | | | | | | | | | |
Collapse
|
26
|
Targeting and in vivo imaging of non-small-cell lung cancer using nebulized multimodal contrast agents. Proc Natl Acad Sci U S A 2014; 111:9247-52. [PMID: 24927562 DOI: 10.1073/pnas.1402196111] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
One of the main reasons for the dismal prognosis of lung cancer is related to the late diagnosis of this pathology. In this work, we evaluated the potential of optimized lung MRI techniques and nebulized ultrasmall multimodal gadolinium-based contrast agents [ultrasmall rigid platforms (USRPs)] as a completely noninvasive approach for non-small-cell lung cancer (NSCLC) in vivo detection. A mouse model of NSCLC expressing the luciferase gene was developed. Ultrashort echo-time free-breathing MRI acquisitions were performed before and after i.v. or intrapulmonary administration of the nanoparticles to identify and segment the tumor. After orotracheal or i.v. administration of USRPs, an excellent colocalization of the position the tumor with MRI, bioluminescence and fluorescence reflectance imaging, and histology was observed in all mice. Significantly higher signal enhancements and contrast-to-noise ratios were observed with orotracheal administration using lower doses, reducing the toxicity issues and the interobserver variability in tumor detection. The observations suggested the existence of an unknown original mechanism (different from the enhanced permeability and retention effect) responsible for this phenomenon. MRI and USRPs were shown to be powerful imaging tools able to detect, quantify, and longitudinally monitor the development of submillimetric NSCLCs. The absence of ionizing radiation and high resolution MRI, along with the complete noninvasiveness and good reproducibility of the proposed protocol, make this technique potentially translatable to humans. To our knowledge this is the first time that the advantages of an orotracheal administration route are demonstrated for the investigation of the pathomorphological changes due to NSCLCs.
Collapse
|
27
|
Vogel-Claussen J, Renne J, Hinrichs J, Schönfeld C, Gutberlet M, Schaumann F, Winkler C, Faulenbach C, Krug N, Wacker FK, Hohlfeld JM. Quantification of pulmonary inflammation after segmental allergen challenge using turbo-inversion recovery-magnitude magnetic resonance imaging. Am J Respir Crit Care Med 2014; 189:650-7. [PMID: 24401150 DOI: 10.1164/rccm.201310-1825oc] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
RATIONALE There is a need to develop novel noninvasive imaging biomarkers that help to evaluate antiinflammatory asthma treatments. OBJECTIVES To investigate whether the extent of the segmental lung edema measured noninvasively using turbo-inversion recovery-magnitude magnetic resonance imaging (TIRM MRI) corresponds to the severity of the regional allergic reaction determined by the percentage of eosinophils in bronchoalveolar lavage fluid (BAL) 24 hours after segmental allergen challenge in patients with asthma compared with normal control subjects. METHODS Eleven volunteers with allergic asthma and five healthy volunteers underwent segmental challenges with different allergen doses by two bronchoscopies 24 hours apart. They had lung MRI at baseline and 6 and 24 hours after segmental challenge. MRI TIRM scores were correlated with the eosinophilic response at 24 hours. MEASUREMENTS AND MAIN RESULTS In patients with asthma, there were significant differences of eosinophil percentages in BAL at 24 hours from segments given standard-dose, low-dose, or no allergen (saline) (P < 0.001). Correspondingly significant differences between the TIRM score in allergen standard-dose, low-dose, and saline-treated segments were observed at 24 hours post-challenge (P < 0.001). With increasing TIRM score at 24 hours the percent eosinophils per segment 24 hours post-challenge also increased accordingly (P < 0.001). There was interobserver agreement for TIRM score grading (kappa = 0.72 for 24-h time point). CONCLUSIONS The MRI-based noninvasive TIRM score is a promising biomarker for the noninvasive detection of the inflammatory response after segmental allergen challenge in patients with asthma and may serve to monitor the therapeutic effectiveness of novel antiinflammatory drugs in future human trials.
Collapse
|