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Vieira TF, Martins FG, Moreira JP, Barbosa T, Sousa SF. In Silico Identification of Possible Inhibitors for Protein Kinase B (PknB) of Mycobacterium tuberculosis. Molecules 2021; 26:6162. [PMID: 34684743 PMCID: PMC8541300 DOI: 10.3390/molecules26206162] [Citation(s) in RCA: 4] [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: 09/14/2021] [Revised: 10/06/2021] [Accepted: 10/08/2021] [Indexed: 01/18/2023] Open
Abstract
With tuberculosis still being one of leading causes of death in the world and the emergence of drug-resistant strains of Mycobacterium tuberculosis (Mtb), researchers have been seeking to find further therapeutic strategies or more specific molecular targets. PknB is one of the 11 Ser/Thr protein kinases of Mtb and is responsible for phosphorylation-mediated signaling, mainly involved in cell wall synthesis, cell division and metabolism. With the amount of structural information available and the great interest in protein kinases, PknB has become an attractive target for drug development. This work describes the optimization and application of an in silico computational protocol to find new PknB inhibitors. This multi-level computational approach combines protein-ligand docking, structure-based virtual screening, molecular dynamics simulations and free energy calculations. The optimized protocol was applied to screen a large dataset containing 129,650 molecules, obtained from the ZINC/FDA-Approved database, Mu.Ta.Lig Virtual Chemotheca and Chimiothèque Nationale. It was observed that the most promising compounds selected occupy the adenine-binding pocket in PknB, and the main interacting residues are Leu17, Val26, Tyr94 and Met155. Only one of the compounds was able to move the active site residues into an open conformation. It was also observed that the P-loop and magnesium position loops change according to the characteristics of the ligand. This protocol led to the identification of six compounds for further experimental testing while also providing additional structural information for the design of more specific and more effective derivatives.
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Affiliation(s)
- Tatiana F. Vieira
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Faculdade de Medicina, Universidade do Porto, 4200-319 Porto, Portugal; (T.F.V.); (F.G.M.); (J.P.M.); (T.B.)
- UCIBIO—Applied Molecular Biosciences Unit, BioSIM-Departamento de Biomedicina, Faculdade de Medicina, Universidade do Porto, 4200-319 Porto, Portugal
| | - Fábio G. Martins
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Faculdade de Medicina, Universidade do Porto, 4200-319 Porto, Portugal; (T.F.V.); (F.G.M.); (J.P.M.); (T.B.)
- UCIBIO—Applied Molecular Biosciences Unit, BioSIM-Departamento de Biomedicina, Faculdade de Medicina, Universidade do Porto, 4200-319 Porto, Portugal
| | - Joel P. Moreira
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Faculdade de Medicina, Universidade do Porto, 4200-319 Porto, Portugal; (T.F.V.); (F.G.M.); (J.P.M.); (T.B.)
- UCIBIO—Applied Molecular Biosciences Unit, BioSIM-Departamento de Biomedicina, Faculdade de Medicina, Universidade do Porto, 4200-319 Porto, Portugal
| | - Tiago Barbosa
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Faculdade de Medicina, Universidade do Porto, 4200-319 Porto, Portugal; (T.F.V.); (F.G.M.); (J.P.M.); (T.B.)
- UCIBIO—Applied Molecular Biosciences Unit, BioSIM-Departamento de Biomedicina, Faculdade de Medicina, Universidade do Porto, 4200-319 Porto, Portugal
| | - Sérgio F. Sousa
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Faculdade de Medicina, Universidade do Porto, 4200-319 Porto, Portugal; (T.F.V.); (F.G.M.); (J.P.M.); (T.B.)
- UCIBIO—Applied Molecular Biosciences Unit, BioSIM-Departamento de Biomedicina, Faculdade de Medicina, Universidade do Porto, 4200-319 Porto, Portugal
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Lavin B, Protti A, Lorrio S, Dong X, Phinikaridou A, Botnar RM, Shah A. MRI with gadofosveset: A potential marker for permeability in myocardial infarction. Atherosclerosis 2018; 275:400-408. [PMID: 29735362 PMCID: PMC6100880 DOI: 10.1016/j.atherosclerosis.2018.04.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2017] [Revised: 03/27/2018] [Accepted: 04/18/2018] [Indexed: 12/23/2022]
Abstract
BACKGROUND AND AIMS Acute ischemia is associated with myocardial endothelial damage and microvessel formation, resulting in leakage of plasma albumin into the myocardial extravascular space. In this study, we tested whether an albumin-binding intravascular contrast agent (gadofosveset) allows for improved quantification of myocardial permeability compared to the conventional extracellular contrast agent Gd-DTPA using late gadolinium enhancement (LGE) and T1 mapping in vivo. METHODS MI was induced in C57BL/6 mice (n = 6) and cardiac magnetic resonance imaging (CMR) was performed at 3, 10 and 21 days post-MI using Gd-DTPA and 24 h later using gadofosveset. Functional, LGE and T1 mapping protocols were performed 45 min post-injection of the contrast agent. RESULTS LGE images showed that both contrast agents provided similar measurements of infarct area at all time points following MI. Importantly, the myocardial R1 measurements after administration of gadofosveset were higher in the acute phase-day 3 (R1 [s-1] = 6.29 ± 0.29) compared to the maturation phase-days 10 and 21 (R1 [s-1] = 4.76 ± 0.30 and 4.48 ± 0.14), suggesting that the uptake of this agent could be used to stage myocardial remodeling. No differences in myocardial R1 were observed after administration of Gd-DTPA at different time points post-MI (R1 [s-1] = 3d: 3.77 ± 0.37; 10d: 2.74 ± 0.06; 21d: 3.35 ± 0.26). The MRI results were validated by ex vivo histology that showed albumin leakage in the myocardium in the acute phase and microvessel formation at later stages. CONCLUSIONS We demonstrate the merits of an albumin-binding contrast agent for monitoring changes in myocardial permeability between acute ischemia and chronic post-MI myocardial remodeling.
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Affiliation(s)
- Begoña Lavin
- School of Biomedical Engineering Imaging Sciences, King's College London, London, UK; The British Heart Foundation Centre of Excellence, Cardiovascular Division, King's College London, London, United Kingdom.
| | - Andrea Protti
- School of Biomedical Engineering Imaging Sciences, King's College London, London, UK; The British Heart Foundation Centre of Excellence, Cardiovascular Division, King's College London, London, United Kingdom; Cardiovascular Division, James Black Centre, King's College Hospital Denmark Hill London, London, SE5 9NU, United Kingdom
| | - Silvia Lorrio
- School of Biomedical Engineering Imaging Sciences, King's College London, London, UK; The British Heart Foundation Centre of Excellence, Cardiovascular Division, King's College London, London, United Kingdom
| | - Xuebin Dong
- Cardiovascular Division, James Black Centre, King's College Hospital Denmark Hill London, London, SE5 9NU, United Kingdom
| | - Alkystis Phinikaridou
- School of Biomedical Engineering Imaging Sciences, King's College London, London, UK; The British Heart Foundation Centre of Excellence, Cardiovascular Division, King's College London, London, United Kingdom
| | - René M Botnar
- School of Biomedical Engineering Imaging Sciences, King's College London, London, UK; The British Heart Foundation Centre of Excellence, Cardiovascular Division, King's College London, London, United Kingdom; Pontificia Universidad Católica de Chile, Escuela de Ingeniería, Santiago, Chile
| | - Ajay Shah
- The British Heart Foundation Centre of Excellence, Cardiovascular Division, King's College London, London, United Kingdom; Cardiovascular Division, James Black Centre, King's College Hospital Denmark Hill London, London, SE5 9NU, United Kingdom
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Nacif MS, Raman FS, Gai N, Jones J, van der Geest RJ, T Sibley C, Liu S, David AB. Myocardial T1 mapping and determination of partition coefficients at 3 tesla: comparison between gadobenate dimeglumine and gadofosveset trisodium. Radiol Bras 2018; 51:13-19. [PMID: 29559761 PMCID: PMC5846320 DOI: 10.1590/0100-3984.2016.0071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Objective To compare an albumin-bound gadolinium chelate (gadofosveset trisodium) and
an extracellular contrast agent (gadobenate dimeglumine), in terms of their
effects on myocardial longitudinal (T1) relaxation time and partition
coefficient. Materials and Methods Study subjects underwent two imaging sessions for T1 mapping at 3 tesla with
a modified look-locker inversion recovery (MOLLI) pulse sequence to obtain
one pre-contrast T1 map and two post-contrast T1 maps (mean 15 and 21 min,
respectively). The partition coefficient was calculated as
ΔR1myocardium
/ΔR1blood , where
R1 is 1/T1. Results A total of 252 myocardial and blood pool T1 values were obtained in 21
healthy subjects. After gadolinium administration, the myocardial T1 was
longer for gadofosveset than for gadobenate, the mean difference between the
two contrast agents being −7.6 ± 60 ms (p = 0.41).
The inverse was true for the blood pool T1, which was longer for gadobenate
than for gadofosveset, the mean difference being 56.5 ± 67 ms
(p < 0.001). The partition coefficient (λ)
was higher for gadobenate than gadofosveset (0.41 vs. 0.33), indicating
slower blood pool washout for gadofosveset than for gadobenate. Conclusion Myocardial T1 times did not differ significantly between gadobenate and
gadofosveset. At typical clinical doses of the contrast agents, partition
coefficients were significantly lower for the intravascular contrast agent
than for the extravascular agent.
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Affiliation(s)
- Marcelo Souto Nacif
- MD, PhD, Universidade Federal Fluminense (UFF), Niterói, RJ, Brazil, National Institutes of Health Clinical Center, National Institute of Biomedical Imaging and Bioengineering, Bethesda, MD, USA
| | - Fabio S Raman
- Biomedical Engineer, National Institutes of Health Clinical Center, National Institute of Biomedical Imaging and Bioengineering, Bethesda, MD, USA
| | - Neville Gai
- MD, National Institutes of Health Clinical Center, National Institute of Biomedical Imaging and Bioengineering, Bethesda, MD, USA
| | - Jacquin Jones
- PhD, National Institutes of Health Clinical Center, Bethesda, MD, USA
| | | | - Christopher T Sibley
- MD, National Institutes of Health Clinical Center, National Institute of Biomedical Imaging and Bioengineering, Bethesda, MD, USA
| | - Songtao Liu
- MD, National Institutes of Health Clinical Center, National Institute of Biomedical Imaging and Bioengineering, Bethesda, MD, USA
| | - A Bluemke David
- MD, PhD, National Institutes of Health Clinical Center, National Institute of Biomedical Imaging and Bioengineering, Bethesda, MD, USA
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Meloni MM, Barton S, Xu L, Kaski JC, Song W, He T. Contrast agents for cardiovascular magnetic resonance imaging: an overview. J Mater Chem B 2017; 5:5714-5725. [DOI: 10.1039/c7tb01241a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Contrast agents for Cardiovascular Magnetic Resonance (CMR) play a major role in research and clinical cardiology.
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Affiliation(s)
- Marco M. Meloni
- Molecular and Clinical Sciences Research Institute
- St George's, University of London
- London
- UK
- School of Pharmacy and Chemistry
| | - Stephen Barton
- School of Pharmacy and Chemistry
- Kingston University
- London
- UK
| | - Lei Xu
- Department of Radiology
- Beijing Anzhen Hospital
- Beijing
- China
| | - Juan C. Kaski
- Molecular and Clinical Sciences Research Institute
- St George's, University of London
- London
- UK
| | - Wenhui Song
- UCL Centre for Biomaterials
- Division of surgery & Interventional Science
- University College of London
- London
- UK
| | - Taigang He
- Molecular and Clinical Sciences Research Institute
- St George's, University of London
- London
- UK
- Royal Brompton Hospital
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Tandon A, Hashemi S, Parks WJ, Kelleman MS, Sallee D, Slesnick TC. Improved high-resolution pediatric vascular cardiovascular magnetic resonance with gadofosveset-enhanced 3D respiratory navigated, inversion recovery prepared gradient echo readout imaging compared to 3D balanced steady-state free precession readout imaging. J Cardiovasc Magn Reson 2016; 18:74. [PMID: 27802802 PMCID: PMC5090984 DOI: 10.1186/s12968-016-0296-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 10/14/2016] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Improved delineation of vascular structures is a common indication for cardiovascular magnetic resonance (CMR) in children and requires high spatial resolution. Currently, pre-contrast 3D, respiratory navigated, T2-prepared, fat saturated imaging with a bSSFP readout (3D bSSFP) is commonly used; however, these images can be limited by blood pool inhomogeneity and exaggeration of metal artifact. We compared image quality of pediatric vasculature obtained using standard 3D bSSFP to 3D, respiratory navigated, inversion recovery prepared imaging with a gradient echo readout (3D IR GRE) performed after administration of gadofosveset trisodium (GT), a blood pool contrast agent. METHODS For both sequences, VCG triggering was used with acquisition during a quiescent period of the cardiac cycle. 3D bSSFP imaging was performed pre-contrast, and 3D IR GRE imaging was performed 5 min after GT administration. We devised a vascular imaging quality score (VIQS) with subscores for coronary arteries, pulmonary arteries and veins, blood pool homogeneity, and metal artifact. Scoring was performed on axial reconstructions of isotropic datasets by two independent readers and differences were adjudicated. Signal- and contrast-to-noise (SNR and CNR) calculations were performed on each dataset. RESULTS Thirty-five patients had both 3D bSSFP and 3D IR GRE imaging performed. 3D IR GRE imaging showed improved overall vascular imaging compared to 3D bSSFP when comparing all-patient VIQS scores (n = 35, median 14 (IQR 11-15), vs 6 (4-10), p < 0.0001), and when analyzing the subset of patients with intrathoracic metal (n = 17, 16 (14-17) vs. 5 (2-9), p < 0.0001). 3D IR GRE showed significantly improved VIQS subscores for imaging the RCA, pulmonary arteries, pulmonary veins, and blood pool homogeneity. In addition, 3D IR GRE imaging showed reduced variability in both all-patient and metal VIQS scores compared to 3D bSSFP (p < 0.05). SNR and CNR were higher with 3D IR GRE in the left ventricle and left atrium, but not the pulmonary arteries. CONCLUSIONS Respiratory navigated 3D IR GRE imaging after GT administration provides improved vascular CMR in pediatric patients compared to pre-contrast 3D bSSFP imaging, as well as improved imaging in patients with intrathoracic metal. It is an excellent alternative in this challenging patient population when high spatial resolution vascular imaging is needed.
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Affiliation(s)
- Animesh Tandon
- Departments of Pediatrics, Radiology, and Biomedical Engineering, University of Texas Southwestern Medical School, Dallas, TX USA
- Children’s Medical Center Dallas, Dallas, TX USA
| | | | - W. James Parks
- Children’s Healthcare of Atlanta, Atlanta, GA USA
- Emory University School of Medicine, Atlanta, GA USA
| | | | - Denver Sallee
- Children’s Healthcare of Atlanta, Atlanta, GA USA
- Emory University School of Medicine, Atlanta, GA USA
| | - Timothy C. Slesnick
- Children’s Healthcare of Atlanta, Atlanta, GA USA
- Emory University School of Medicine, Atlanta, GA USA
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Lavin B, Phinikaridou A, Lorrio S, Zaragoza C, Botnar RM. Monitoring vascular permeability and remodeling after endothelial injury in a murine model using a magnetic resonance albumin-binding contrast agent. Circ Cardiovasc Imaging 2015; 8:CIRCIMAGING.114.002417. [PMID: 25873720 PMCID: PMC4405074 DOI: 10.1161/circimaging.114.002417] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Despite the beneficial effects of vascular interventions, these procedures may damage the endothelium leading to increased vascular permeability and remodeling. Re-endothelialization of the vessel wall, with functionally and structurally intact cells, is controlled by endothelial nitric oxide synthase (NOS3) and is crucial for attenuating adverse effects after injury. We investigated the applicability of the albumin-binding MR contrast agent, gadofosveset, to noninvasively monitor focal changes in vascular permeability and remodeling, after injury, in NOS3-knockout (NOS3(-/-)) and wild-type (WT) mice in vivo. METHODS AND RESULTS WT and NOS3(-/-) mice were imaged at 7, 15, and 30 days after aortic denudation or sham-surgery. T1 mapping (R1=1/T1, s(-1)) and delayed-enhanced MRI were used as measurements of vascular permeability (R1) and remodeling (vessel wall enhancement, mm(2)) after gadofosveset injection, respectively. Denudation resulted in higher vascular permeability and vessel wall enhancement 7 days after injury in both strains compared with sham-operated animals. However, impaired re-endothelialization and increased neovascularization in NOS3(-/-) mice resulted in significantly higher R1 at 15 and 30 days post injury compared with WT mice that showed re-endothelialization and lack of neovascularization (R1 [s(-1)]=15 days: NOS3 (-/-)4.02 [interquartile range, IQR, 3.77-4.41] versus WT2.39 [IQR, 2.35-2.92]; 30 days: NOS3 (-/-)4.23 [IQR, 3.94-4.68] versus WT2.64 [IQR, 2.33-2.80]). Similarly, vessel wall enhancement was higher in NOS3(-/-) but recovered in WT mice (area [mm(2)]=15 days: NOS3 (-/-)5.20 [IQR, 4.68-6.80] versus WT2.13 [IQR, 0.97-3.31]; 30 days: NOS3 (-/-)7.35 [IQR, 5.66-8.61] versus WT1.60 [IQR, 1.40-3.18]). Ex vivo histological studies corroborated the MRI findings. CONCLUSIONS We demonstrate that increased vascular permeability and remodeling, after injury, can be assessed noninvasively using an albumin-binding MR contrast agent and may be used as surrogate markers for evaluating the healing response of the vessel wall after injury.
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Affiliation(s)
- Begoña Lavin
- From the Division of Imaging Sciences and Biomedical Engineering, King's College London, King's Health Partners, St. Thomas' Hospital, London, United Kingdom (B.L., A.P., S.L., R.M.B.); The British Heart Foundation Centre of Excellence, Cardiovascular Division (B.L., A.P., R.M.B.) and Wellcome Trust and EPSRC Medical Engineering Center (B.L., R.M.B.), King's College London, London, United Kingdom; Cardiovascular Research Unit, University Francisco de Vitoria/Hospital Ramón y Cajal, Ctra. Colmenar Viejo, km 9,100, Madrid 28034, Spain (C.Z.).
| | - Alkystis Phinikaridou
- From the Division of Imaging Sciences and Biomedical Engineering, King's College London, King's Health Partners, St. Thomas' Hospital, London, United Kingdom (B.L., A.P., S.L., R.M.B.); The British Heart Foundation Centre of Excellence, Cardiovascular Division (B.L., A.P., R.M.B.) and Wellcome Trust and EPSRC Medical Engineering Center (B.L., R.M.B.), King's College London, London, United Kingdom; Cardiovascular Research Unit, University Francisco de Vitoria/Hospital Ramón y Cajal, Ctra. Colmenar Viejo, km 9,100, Madrid 28034, Spain (C.Z.)
| | - Silvia Lorrio
- From the Division of Imaging Sciences and Biomedical Engineering, King's College London, King's Health Partners, St. Thomas' Hospital, London, United Kingdom (B.L., A.P., S.L., R.M.B.); The British Heart Foundation Centre of Excellence, Cardiovascular Division (B.L., A.P., R.M.B.) and Wellcome Trust and EPSRC Medical Engineering Center (B.L., R.M.B.), King's College London, London, United Kingdom; Cardiovascular Research Unit, University Francisco de Vitoria/Hospital Ramón y Cajal, Ctra. Colmenar Viejo, km 9,100, Madrid 28034, Spain (C.Z.)
| | - Carlos Zaragoza
- From the Division of Imaging Sciences and Biomedical Engineering, King's College London, King's Health Partners, St. Thomas' Hospital, London, United Kingdom (B.L., A.P., S.L., R.M.B.); The British Heart Foundation Centre of Excellence, Cardiovascular Division (B.L., A.P., R.M.B.) and Wellcome Trust and EPSRC Medical Engineering Center (B.L., R.M.B.), King's College London, London, United Kingdom; Cardiovascular Research Unit, University Francisco de Vitoria/Hospital Ramón y Cajal, Ctra. Colmenar Viejo, km 9,100, Madrid 28034, Spain (C.Z.)
| | - René M Botnar
- From the Division of Imaging Sciences and Biomedical Engineering, King's College London, King's Health Partners, St. Thomas' Hospital, London, United Kingdom (B.L., A.P., S.L., R.M.B.); The British Heart Foundation Centre of Excellence, Cardiovascular Division (B.L., A.P., R.M.B.) and Wellcome Trust and EPSRC Medical Engineering Center (B.L., R.M.B.), King's College London, London, United Kingdom; Cardiovascular Research Unit, University Francisco de Vitoria/Hospital Ramón y Cajal, Ctra. Colmenar Viejo, km 9,100, Madrid 28034, Spain (C.Z.)
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Richardson OC, Bane O, Scott MLJ, Tanner SF, Waterton JC, Sourbron SP, Carroll TJ, Buckley DL. Gadofosveset-based biomarker of tissue albumin concentration: Technical validation in vitro and feasibility in vivo. Magn Reson Med 2015; 73:244-53. [PMID: 24515975 PMCID: PMC4296221 DOI: 10.1002/mrm.25128] [Citation(s) in RCA: 12] [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: 11/26/2013] [Accepted: 12/19/2013] [Indexed: 11/07/2022]
Abstract
PURPOSE There is currently no adequate method of mapping physiologic and pathophysiologic tissue albumin concentrations in human subjects. The objective of this study was to devise and evaluate a biomarker of regional albumin concentration using gadofosveset-enhanced MRI. THEORY AND METHODS A binding and relaxation model was devised and evaluated in vitro in solutions of albumin at 3.0 Tesla (T) and 4.7T. The method was evaluated in the heart in seven volunteers at 3.0T. RESULTS MRI-derived estimates of albumin concentration were in good agreement with true values over the range 0.1-1.0 mM (Pearson correlation coefficients of 0.85 and 0.88 for 3.0T and 4.7T, respectively). The mean calculated albumin concentration in the myocardium for the volunteers was 0.02 mM (range, 0.01-0.03 mM). CONCLUSION Accurate estimates of albumin concentration in vitro suggest this may be a viable noninvasive alternative to existing techniques. In the myocardium the MRI-derived estimates of albumin concentration indicate the practical feasibility of the technique but were below expected values. Gadofosveset-enhanced MR relaxometry has potential in providing biomarkers of regional albumin concentration; further evaluation is required before it can be used reliably in vivo.
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Affiliation(s)
- Owen C Richardson
- Division of Medical Physics, University of LeedsLeeds, United Kingdom
| | - Octavia Bane
- Departments of Biomedical Engineering and Radiology, Northwestern UniversityChicago, Illinois, USA
| | - Marietta LJ Scott
- Personalized Healthcare and Biomarkers, AstraZenecaMacclesfield, Cheshire, United Kingdom
| | - Steven F Tanner
- Department of Medical Physics and Engineering, Leeds Teaching Hospitals NHS TrustLeeds, United Kingdom.
| | - John C Waterton
- Personalized Healthcare and Biomarkers, AstraZenecaMacclesfield, Cheshire, United Kingdom
| | - Steven P Sourbron
- Division of Medical Physics, University of LeedsLeeds, United Kingdom
| | - Timothy J Carroll
- Departments of Biomedical Engineering and Radiology, Northwestern UniversityChicago, Illinois, USA
| | - David L Buckley
- Division of Medical Physics, University of LeedsLeeds, United Kingdom
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Doltra A, Amundsen BH, Gebker R, Fleck E, Kelle S. Emerging concepts for myocardial late gadolinium enhancement MRI. Curr Cardiol Rev 2014; 9:185-90. [PMID: 23909638 PMCID: PMC3780343 DOI: 10.2174/1573403x113099990030] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Accepted: 02/24/2013] [Indexed: 12/25/2022] Open
Abstract
Late gadolinium enhancement is a useful tool for scar detection, based on differences in the volume of distribution of gadolinium, an extracellular agent. The presence of fibrosis in the myocardium amenable to be detected with late gadolinium enhancement MRI is found not only in ischemic cardiomyopathy, in which it offers information regarding viability and prognosis, but also in a wide variety of non-ischemic cardiomyopathies. In the following review we will discuss the methodological aspects of gadolinium-based imaging, as well as its applications and anticipated future developments.
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Affiliation(s)
- Adelina Doltra
- Thorax Institute, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer, University of Barcelona, Spain
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Magnetic resonance imaging of cardiovascular fibrosis and inflammation: from clinical practice to animal studies and back. BIOMED RESEARCH INTERNATIONAL 2013; 2013:676489. [PMID: 24058912 PMCID: PMC3766566 DOI: 10.1155/2013/676489] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 07/13/2013] [Accepted: 07/21/2013] [Indexed: 01/29/2023]
Abstract
Late gadolinium enhancement is the technique of choice for detecting myocardial fibrosis. Although this technique is used in a wide range of cardiovascular pathologies, ischemic cardiomyopathy and the workup for myocarditis and other cardiomyopathies make up a significant proportion of the total indications. Multiple studies during the last decade have demonstrated its utility to adequately characterize myocardial tissue and offer diagnostic and prognostic information. Recent T1 mapping techniques aim to overcome the limitations of late gadolinium enhancement to assess diffuse fibrosis. 19F magnetic resonance has recently emerged as a promising technique for the assessment of inflammation. In the following review we will discuss the basic aspects of fibrosis assessment with MR and its utility for diagnostic and prognostic evaluation. We will also address the topic of cardiovascular inflammation imaging with 19F as a potential new development that may broaden the indications for MR in the future.
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