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Accelerated Simultaneous T 2 and T 2* Mapping of Multiple Sclerosis Lesions Using Compressed Sensing Reconstruction of Radial RARE-EPI MRI. Tomography 2023; 9:299-314. [PMID: 36828376 PMCID: PMC9960840 DOI: 10.3390/tomography9010024] [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: 11/16/2022] [Revised: 01/26/2023] [Accepted: 01/27/2023] [Indexed: 02/04/2023] Open
Abstract
(1) Background: Radial RARE-EPI MRI facilitates simultaneous T2 and T2* mapping (2in1-RARE-EPI). With modest undersampling (R = 2), the speed gain of 2in1-RARE-EPI relative to Multi-Spin-Echo and Multi-Gradient-Recalled-Echo references is limited. Further reduction in scan time is crucial for clinical studies investigating T2 and T2* as imaging biomarkers. We demonstrate the feasibility of further acceleration, utilizing compressed sensing (CS) reconstruction of highly undersampled 2in1-RARE-EPI. (2) Methods: Two-fold radially-undersampled 2in1-RARE-EPI data from phantoms, healthy volunteers (n = 3), and multiple sclerosis patients (n = 4) were used as references, and undersampled (Rextra = 1-12, effective undersampling Reff = 2-24). For each echo time, images were reconstructed using CS-reconstruction. For T2 (RARE module) and T2* mapping (EPI module), a linear least-square fit was applied to the images. T2 and T2* from CS-reconstruction of undersampled data were benchmarked against values from CS-reconstruction of the reference data. (3) Results: We demonstrate accelerated simultaneous T2 and T2* mapping using undersampled 2in1-RARE-EPI with CS-reconstruction is feasible. For Rextra = 6 (TA = 01:39 min), the overall MAPE was ≤8% (T2*) and ≤4% (T2); for Rextra = 12 (TA = 01:06 min), the overall MAPE was <13% (T2*) and <5% (T2). (4) Conclusion: Substantial reductions in scan time are achievable for simultaneous T2 and T2* mapping of the brain using highly undersampled 2in1-RARE-EPI with CS-reconstruction.
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Lee LE, Chandrasekar B, Yu P, Ma L. Quantification of myocardial fibrosis using noninvasive T2-mapping magnetic resonance imaging: Preclinical models of aging and pressure overload. NMR IN BIOMEDICINE 2022; 35:e4641. [PMID: 34729828 DOI: 10.1002/nbm.4641] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 10/04/2021] [Accepted: 10/08/2021] [Indexed: 05/02/2023]
Abstract
Noninvasive imaging of cardiac fibrosis is important for early diagnosis and intervention in chronic heart diseases. Here, we investigated whether noninvasive, contrast agent-free MRI T2 -mapping can quantify myocardial fibrosis in preclinical models of aging and pressure overload. Myocardial fibrosis and remodeling were analyzed in two animal models: (i) aging (15-month-old male CF-1 mice vs. young 6- to 8-week-old mice), and (ii) pressure overload (PO; by transverse aortic constriction in 4- to 5-month-old male C57BL/6 mice vs. sham-operated for 14 days). In vivo T2 -mapping was performed by acquiring data during the isovolumic and early diastolic phases, with a modified respiratory and ECG-triggered multiecho TurboRARE sequence on a 7-T MRI. Cine MRI provided cardiac morphology and function. A quantitative segmentation method was developed to analyze the in vivo T2 -maps of hearts at midventricle, apex, and basal regions. The cardiac fibrosis area was analyzed ex vivo by picro sirius red (PSR) staining. Both aged and pressure-overloaded hearts developed significant myocardial contractile dysfunction, cardiac hypertrophy, and interstitial fibrosis. The aged mice had two phenotypes, fibrotic and mild-fibrotic. Notably, the aged fibrotic subgroup and the PO mice showed a marked decrease in T2 relaxation times (25.3 ± 0.6 in aged vs. 29.9 ± 0.7 ms in young mice, p = 0.002; and 24.3 ± 1.7 in PO vs. 28.7 ± 0.7 ms in shams, p = 0.05). However, no significant difference in T2 was detected between the aged mild-fibrotic subgroup and the young mice. Accordingly, an inverse correlation between myocardial fibrosis percentage (FP) and T2 relaxation time was derived (R2 = 0.98): T2 (ms) = 30.45 - 1.05 × FP. Thus, these results demonstrate a statistical agreement between T2 -map-quantified fibrosis and PSR staining in two different clinically relevant animal models. In conclusion, T2 -mapping MRI is a promising noninvasive contrast agent-free quantitative technique to characterize myocardial fibrosis.
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Affiliation(s)
- Li E Lee
- Research Division/Biomolecular Imaging Center, Harry S. Truman Memorial Veterans' Hospital, Columbia, Missouri, USA
- Department of Physics and Astronomy, University of Missouri, Columbia, Missouri, USA
| | - Bysani Chandrasekar
- Research Division/Biomolecular Imaging Center, Harry S. Truman Memorial Veterans' Hospital, Columbia, Missouri, USA
- Department of Medicine, University of Missouri, Columbia, Missouri, USA
| | - Ping Yu
- Department of Physics and Astronomy, University of Missouri, Columbia, Missouri, USA
| | - Lixin Ma
- Research Division/Biomolecular Imaging Center, Harry S. Truman Memorial Veterans' Hospital, Columbia, Missouri, USA
- Department of Physics and Astronomy, University of Missouri, Columbia, Missouri, USA
- Department of Radiology, University of Missouri, Columbia, Missouri, USA
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Gu Y, Gao H, Kim K, Liu Y, Ramos-Estebanez C, Luo Y, Wang Y, Yu X. Dynamic oxygen-17 MRI with adaptive temporal resolution using golden-means-based 3D radial sampling. Magn Reson Med 2021; 85:3112-3124. [PMID: 33368649 PMCID: PMC8324328 DOI: 10.1002/mrm.28636] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 10/26/2020] [Accepted: 11/17/2020] [Indexed: 12/18/2022]
Abstract
PURPOSE The aim of this study was to develop a high-resolution 3D oxygen-17 (17 O) MRI method to delineate the kinetics of 17 O-enriched water (H217 O) across the entire mouse brain after a bolus injection via the tail vein. METHODS The dynamic 17 O signal was acquired with a golden-means-based 3D radial sampling scheme. To achieve adequate temporal resolution with preserved spatial resolution, a k-space-weighted view sharing strategy was used in image reconstruction with an adaptive window size tailored to the kinetics of the 17 O signal. Simulation studies were performed to determine the adequate image reconstruction parameters. The established method was applied to delineating the kinetics of intravenously injected H217 O in vivo in the post-stroke mouse brain. RESULTS The proposed dynamic 17 O-MRI method achieved an isotropic resolution of 1.21 mm (0.77 mm nominal) in mouse brain at 9.4T, with the temporal resolution increased gradually from 3 s at the initial phase of rapid signal increase to 15 s at the steady-state. The high spatial resolution enabled the delineation of the heterogeneous H217 O uptake and washout kinetics in stroke-affected mouse brain. CONCLUSION The current study demonstrated a 3D 17 O-MRI method for dynamic monitoring of 17 O signal changes with high spatial and temporal resolution. The method can be utilized to quantify physiological parameters such as cerebral blood flow and blood-brain barrier permeability by tracking injected H217 O. It can also be used to measure oxygen consumption rate in 17 O-oxygen inhalation studies.
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Affiliation(s)
- Yuning Gu
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, USA
| | - Huiyun Gao
- Department of Medicine, Case Western Reserve University, Cleveland, Ohio, USA
| | - Kihwan Kim
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, USA
| | - Yuchi Liu
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, USA
| | - Ciro Ramos-Estebanez
- Department of Neurology & Rehabilitation and Neurosurgery, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Yu Luo
- Department of Molecular Genetics, University of Cincinnati, Cincinnati, Ohio, USA
| | - Yunmei Wang
- Department of Medicine, Case Western Reserve University, Cleveland, Ohio, USA
| | - Xin Yu
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, USA
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Naresh NK, Misener S, Zhang Z, Yang C, Ruh A, Bertolino N, Epstein FH, Collins JD, Markl M, Procissi D, Carr JC, Allen BA. Cardiac MRI Myocardial Functional and Tissue Characterization Detects Early Cardiac Dysfunction in a Mouse Model of Chemotherapy-Induced Cardiotoxicity. NMR IN BIOMEDICINE 2020; 33:e4327. [PMID: 32567177 DOI: 10.1002/nbm.4327] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 04/14/2020] [Accepted: 05/06/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Doxorubicin and doxorubicin-trastuzumab combination chemotherapy have been associated with cardiotoxicity that eventually leads to heart failure and may limit dose-effective cancer treatment. Current diagnostic strategies rely on decreased ejection fraction (EF) to diagnose cardiotoxicity. PURPOSE The aim of this study is to explore the potential of cardiac MR (CMR) imaging to identify imaging biomarkers in a mouse model of chemotherapy-induced cardiotoxicity. METHODS A cumulative dose of 25 mg/kg doxorubicin was administered over three weeks using subcutaneous pellets (n = 9, Dox). Another group (n = 9) received same dose of Dox and a total of 10 mg/kg trastuzumab (DT). Mice were imaged at baseline, 5/6 weeks and 10 weeks post-treatment on a 7T MRI system. The protocol included short-axis cine MRI covering the left ventricle (LV) and mid-ventricular short-axis tissue phase mapping (TPM), pre- and post-contrast T1 mapping, T2 mapping and Displacement Encoding with Stimulated Echoes (DENSE) strain encoded MRI. EF, peak myocardial velocities, native T1, T2, extracellular volume (ECV), and myocardial strain were quantified. N = 7 mice were sacrificed for histopathologic assessment of apoptosis at 5/6 weeks. RESULTS Global peak systolic longitudinal velocity was reduced at 5/6 weeks in Dox (0.6 ± 0.3 vs 0.9 ± 0.3, p = 0.02). In the Dox group, native T1 was reduced at 5/6 weeks (1.3 ± 0.2 ms vs 1.6 ± 0.2 ms, p = 0.02), and relatively normalized at week 10 (1.4 ± 0.1 ms vs 1.6 ± 0.2 ms, p > 0.99). There was no change in EF and other MRI parameters and histopathologic results demonstrated minimal apoptosis in all mice (~1-2 apoptotic cell/high power field), suggesting early-stage cardiotoxicity. CONCLUSIONS In a mouse model of chemotherapy-induced cardiotoxicity using doxorubicin and trastuzumab, advanced CMR shows promise in identifying treatment-related decrease in myocardial velocity and native T1 prior to the onset of cardiomyocyte apoptosis and reduction of EF.
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Affiliation(s)
- Nivedita K Naresh
- Department of Radiology, Northwestern University, 737 N. Michigan Ave, Chicago, IL, USA
| | - Sol Misener
- Department of Radiology, Northwestern University, 737 N. Michigan Ave, Chicago, IL, USA
| | - Zhouli Zhang
- Department of Radiology, Northwestern University, 737 N. Michigan Ave, Chicago, IL, USA
| | - Cynthia Yang
- Department of Radiology, Northwestern University, 737 N. Michigan Ave, Chicago, IL, USA
| | - Alexander Ruh
- Department of Radiology, Northwestern University, 737 N. Michigan Ave, Chicago, IL, USA
| | - Nicola Bertolino
- Department of Radiology, Northwestern University, 737 N. Michigan Ave, Chicago, IL, USA
| | - Frederick H Epstein
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, USA
| | - Jeremy D Collins
- Department of Radiology, Northwestern University, 737 N. Michigan Ave, Chicago, IL, USA
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
| | - Michael Markl
- Department of Radiology, Northwestern University, 737 N. Michigan Ave, Chicago, IL, USA
- McCormick School of Engineering, Northwestern University, Chicago, IL, USA
| | - Daniele Procissi
- Department of Radiology, Northwestern University, 737 N. Michigan Ave, Chicago, IL, USA
| | - James C Carr
- Department of Radiology, Northwestern University, 737 N. Michigan Ave, Chicago, IL, USA
| | - Bradley A Allen
- Department of Radiology, Northwestern University, 737 N. Michigan Ave, Chicago, IL, USA
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Palmisano A, Piccoli M, Monti CB, Canu T, Cirillo F, Napolitano A, Perani L, Signorelli P, Vignale D, Anastasia L, Esposito A. Single-shot morpho-functional and structural characterization of the left-ventricle in a mouse model of acute ischemia-reperfusion injury with an optimized 3D IntraGate cine FLASH sequence at 7T MR. Magn Reson Imaging 2020; 68:127-135. [PMID: 32004712 DOI: 10.1016/j.mri.2020.01.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/08/2020] [Accepted: 01/26/2020] [Indexed: 11/16/2022]
Abstract
Preclinical cardiac MR is challenging and time-consuming. A fast and comprehensive acquisition protocol and standardized image post-processing may improve preclinical research, reducing acquisition time, costs and variability of results. In the present study, we evaluated the feasibility of a contrast-enhanced 3D IntraGate steady-state cine sequence (ce-3D-IG-cine) with short acquisition time (11 min) for a single-shot combined characterization of left ventricle (LV) remodeling and infarct size (IS) in a mouse model of acute ischemia-reperfusion injury. Sixteen male C57BL/6N mice underwent 7T cardiac MR (Bruker, BioSpec 70/30) including optimized ce-3D-IG-cine (total scan time 11 min) at day 1, 5 and 28 after surgery. LV end-diastolic volume (EDVMR) and ejection fraction (EFMR) extracted from MR were compared to ones from short-axis (SA-EDVecho, SA-EFecho) and parasternal long-axis (LA-EDVecho, LA-EFecho) echocardiography. IS was manually and semiautomatically segmented from ce-3D-IG-cine using different standard deviation (SD +2, +3, +4, +5, +6 in respect to a reference tissue). Mice were sacrificed at day 28, immediately after imaging. IS at day 28 was compared to injury burden at histology. MR and echocardiographic morpho-functional parameters were compared, as IS from MR and histology. Bland-Altman plots were used to assess the agreement in ischemic burden segmentation. Volumetric and functional parameters measured on ce-3D-IG-cine correlated to the correspondent echocardiographic parameter (EDVMR vs SA-EDVecho: ρ = 0.813; EDVMR vs LA-EDVecho: ρ = 0.845; EFMR vs SA-EFecho ρ = 0.612; EFMR vs LA-EFecho ρ = 0.791; p < 0.001 in all cases). Manually segmented IS strongly correlated with the scar at histology (ρ = 0.904, p < 0.001). A threshold of +3SD showed the highest performance for semiautomatic assessment of IS compared to manual segmentation (ρ = 0.965, p < 0.001), with an overall reproducibility of 73%, and a peak reproducibility of 80% at day 1. The ce-3D-IG-cine sequence, manually or semiautomatically segmented using 3SD threshold, allows fast and comprehensive LV morpho-functional and structural characterization in myocardial ischemia-reperfusion injury model.
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Affiliation(s)
- Anna Palmisano
- Vita-Salute San Raffaele University, Milan, Italy; Preclinical Imaging Facility, Experimental Imaging Center, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Marco Piccoli
- Stem Cells for Tissue Engineering Laboratory, IRCCS Policlinico San Donato, San Donato Milanese, Milan, Italy
| | | | - Tamara Canu
- Preclinical Imaging Facility, Experimental Imaging Center, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Federica Cirillo
- Stem Cells for Tissue Engineering Laboratory, IRCCS Policlinico San Donato, San Donato Milanese, Milan, Italy
| | - Angela Napolitano
- Vita-Salute San Raffaele University, Milan, Italy; Preclinical Imaging Facility, Experimental Imaging Center, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Laura Perani
- Preclinical Imaging Facility, Experimental Imaging Center, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Paola Signorelli
- Biochemistry and Molecular Biology Laboratory, Health Sciences Department, University of Milan, Milan, Italy
| | - Davide Vignale
- Preclinical Imaging Facility, Experimental Imaging Center, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Luigi Anastasia
- Vita-Salute San Raffaele University, Milan, Italy; Stem Cells for Tissue Engineering Laboratory, IRCCS Policlinico San Donato, San Donato Milanese, Milan, Italy
| | - Antonio Esposito
- Vita-Salute San Raffaele University, Milan, Italy; Preclinical Imaging Facility, Experimental Imaging Center, IRCCS San Raffaele Scientific Institute, Milan, Italy.
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Hu H, Yang Q, Baroni S, Yang H, Aime S, Steinmetz NF. Polydopamine-decorated tobacco mosaic virus for photoacoustic/magnetic resonance bimodal imaging and photothermal cancer therapy. NANOSCALE 2019; 11:9760-9768. [PMID: 31066418 PMCID: PMC6679940 DOI: 10.1039/c9nr02065a] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Nanotheranostic reagents that integrate magnetic resonance imaging (MRI) and photothermal therapy (PTT) offer a promising strategy for the treatment of human disease. However, classic gadolinium (Gd)-based T1-MRI contrast agents are limited by their low relaxivity. To address this, we produced Gd-loaded Tobacco mosaic virus (TMV) particles coated with the mussel-inspired biopolymer polydopamine (PDA). Such biocompatible nanotheranostic reagents can be used to facilitate PTT, guided by multimodal magnetic resonance/photoacoustic imaging. The r1-relaxivity of the Gd-TMV-PDA particles at 60 MHz was ∼80 mM-1 s-1, compared to 13.63 mM-1 s-1 for the uncoated Gd-TMV particles. The Gd-TMV-PDA particles also promoted strong near-infrared absorption with high photothermal conversion efficiency (28.9%) and demonstrated excellent photoacoustic contrast. Multimodal imaging and PTT resulted in the effective killing of PC-3 prostate cancer cells. Gd-TMV-PDA nanoparticles therefore offer a promising theranostic approach that can now be tested in vivo in cancer models.
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Affiliation(s)
- He Hu
- Department of NanoEngineering, University of California-San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USA
- Department of Biomedical Engineering, Case Western Reserve University Schools of Medicine and Engineering, 10900 Euclid Ave., Cleveland, OH 44106, USA
- Corresponding authors: Prof. Nicole F. Steinmetz: , Dr. He Hu:
| | - Qi Yang
- Department of Chemistry, Shanghai Normal University, 100 Guilin Rd., Shanghai, China
| | - Simona Baroni
- Department of Molecular Biotechnologies and Health Sciences, University of Torino, Via Nizza, 52, Torino, 10126, Italy
| | - Hong Yang
- Department of Chemistry, Shanghai Normal University, 100 Guilin Rd., Shanghai, China
| | - Silvio Aime
- Department of Molecular Biotechnologies and Health Sciences, University of Torino, Via Nizza, 52, Torino, 10126, Italy
| | - Nicole F. Steinmetz
- Department of NanoEngineering, University of California-San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USA
- Department of Radiology, University of California-San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USA
- Department of Bioengineering, University of California-San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USA
- Moores Cancer Center, University of California-San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USA
- Department of Biomedical Engineering, Case Western Reserve University Schools of Medicine and Engineering, 10900 Euclid Ave., Cleveland, OH 44106, USA
- Corresponding authors: Prof. Nicole F. Steinmetz: , Dr. He Hu:
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Jiang K, Tang H, Mishra PK, Macura SI, Lerman LO. A rapid T 1 mapping method for assessment of murine kidney viability using dynamic manganese-enhanced magnetic resonance imaging. Magn Reson Med 2018; 80:190-199. [PMID: 29193339 PMCID: PMC5876081 DOI: 10.1002/mrm.27025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 10/09/2017] [Accepted: 11/01/2017] [Indexed: 12/22/2022]
Abstract
PURPOSE Dynamic manganese-enhanced MRI (MEMRI) allows assessment of tissue viability by tracing manganese uptake. We aimed to develop a rapid T1 mapping method for dynamic MEMRI to facilitate assessments of murine kidney viability. METHODS A multi-slice saturation recovery fast spin echo (MSRFSE) was developed, validated, and subsequently applied in dynamic MEMRI at 16.4T on ischemic mouse kidneys after 4 weeks of unilateral renal artery stenosis (RAS). Baseline T1 values and post-contrast R1 (1/T1 ) changes were measured in cortex (CO), outer (OSOM), inner (ISOM) strips of outer medulla, and inner medulla (IM). RESULTS Validation studies showed strong agreement between MSRFSE and an established saturation recovery Look-Locker method. Baseline T1 (s) increased in the stenotic kidney CO (2.10 [1.95-2.56] vs. 1.88 [1.81-2.00], P = 0.0317) and OSOM (2.17 [2.05-2.33] vs. 1.96 [1.87-2.00], P = 0.0075) but remained unchanged in ISOM and IM. This method allowed a temporal resolution of 1.43 min in dynamic MEMRI. Mn2+ uptake and retention decreased in stenotic kidneys, particularly in the OSOM (ΔR1 : 0.48 [0.38-0.56] vs. 0.64 [0.61-0.69] s-1 , P < 0.0001). CONCLUSION Dynamic MEMRI by MSRFSE detected decreased cellular viability and discerned the regional responses to RAS. This technique may provide a valuable tool for noninvasive evaluation of renal viability. Magn Reson Med 80:190-199, 2018. © 2017 International Society for Magnetic Resonance in Medicine.
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Affiliation(s)
- Kai Jiang
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota, USA
| | - Hui Tang
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota, USA
| | - Prassana K. Mishra
- Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, USA
| | - Slobodan I. Macura
- Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, USA
| | - Lilach O. Lerman
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota, USA
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Hu H, Zhang Y, Shukla S, Gu Y, Yu X, Steinmetz NF. Dysprosium-Modified Tobacco Mosaic Virus Nanoparticles for Ultra-High-Field Magnetic Resonance and Near-Infrared Fluorescence Imaging of Prostate Cancer. ACS NANO 2017; 11:9249-9258. [PMID: 28858475 PMCID: PMC5747565 DOI: 10.1021/acsnano.7b04472] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The increasing prevalence of ultra-high-field magnetic resonance imaging (UHFMRI) in biomedical research and clinical settings will improve the resolution and diagnostic accuracy of MRI scans. However, better contrast agents are needed to achieve a satisfactory signal-to-noise ratio. Here, we report the synthesis of a bimodal contrast agent prepared by loading the internal cavity of tobacco mosaic virus (TMV) nanoparticles with a dysprosium (Dy3+) complex and the near-infrared fluorescence (NIRF) dye Cy7.5. The external surface of TMV was conjugated with an Asp-Gly-Glu-Ala (DGEA) peptide via a polyethylene glycol linker to target integrin α2β1. The resulting nanoparticle (Dy-Cy7.5-TMV-DGEA) was stable and achieved a high transverse relaxivity in ultra-high-strength magnetic fields (326 and 399 mM-1 s-1 at 7 and 9.4 T, respectively). The contrast agent was also biocompatible (low cytotoxicity) and targeted PC-3 prostate cancer cells and tumors in vitro and in vivo as confirmed by bimodal NIRF imaging and T2-mapping UHFMRI. Our results show that Dy-Cy7.5-TMV-DGEA is suitable for multiscale MRI scanning from the cellular level to the whole body, particularly in the context of UHFMRI applications.
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Affiliation(s)
- He Hu
- Department of Biomedical Engineering, Case Western Reserve University Schools of Medicine and Engineering, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - Yifan Zhang
- Department of Biomedical Engineering, Case Western Reserve University Schools of Medicine and Engineering, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - Sourabh Shukla
- Department of Biomedical Engineering, Case Western Reserve University Schools of Medicine and Engineering, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - Yuning Gu
- Department of Biomedical Engineering, Case Western Reserve University Schools of Medicine and Engineering, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - Xin Yu
- Department of Biomedical Engineering, Case Western Reserve University Schools of Medicine and Engineering, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - Nicole F. Steinmetz
- Department of Biomedical Engineering, Case Western Reserve University Schools of Medicine and Engineering, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
- Department of Radiology, Case Western Reserve University School of Medicine, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
- Department of Materials Science and Engineering, Case Western Reserve University School of Engineering, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
- Department of Macromolecular Science and Engineering, Case Western Reserve University School of Engineering, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
- Division of General Medical Sciences-Oncology, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
- Corresponding Author:
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