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Masiewicz E, Ullah F, Mieloch A, Godlewski J, Kruk D. Dynamical properties of solid and hydrated collagen: Insight from nuclear magnetic resonance relaxometry. J Chem Phys 2024; 160:165101. [PMID: 38656443 DOI: 10.1063/5.0191409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 03/07/2024] [Indexed: 04/26/2024] Open
Abstract
1H spin-lattice Nuclear Magnetic Resonance relaxometry experiments have been performed for collagen and collagen-based artificial tissues in the frequency range of 10 kHz-20 MHz. The studies were performed for non-hydrated and hydrated materials. The relaxation data have been interpreted as including relaxation contributions originating from 1H-1H and 1H-14N dipole-dipole interactions, the latter leading to Quadrupole Relaxation Enhancement effects. The 1H-1H relaxation contributions have been decomposed into terms associated with dynamical processes on different time scales. A comparison of the parameters for the non-hydrated and hydrated systems has shown that hydration leads to a decrease in the dipolar relaxation constants without significantly affecting the dynamical processes. In the next step, the relaxation data for the hydrated systems were interpreted in terms of a model assuming two-dimensional translational diffusion of water molecules in the vicinity of the macromolecular surfaces and a sub-diffusive motion leading to a power law of the frequency dependencies of the relaxation rates. It was found that the water diffusion process is slowed down by at least two orders of magnitude compared to bulk water diffusion. The frequency dependencies of the relaxation rates in hydrated tissues and hydrated collagen are characterized by different power laws (ωH-β, where ωH denotes the 1H resonance frequency): the first of about 0.4 and the second close to unity.
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Affiliation(s)
- Elzbieta Masiewicz
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
| | - Farman Ullah
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
| | - Adrianna Mieloch
- Department of Human Histology and Embryology, University of Warmia and Mazury in Olsztyn, Warszawska 30, 10-082 Olsztyn, Poland
| | - Janusz Godlewski
- Department of Human Histology and Embryology, University of Warmia and Mazury in Olsztyn, Warszawska 30, 10-082 Olsztyn, Poland
| | - Danuta Kruk
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
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Water Dynamics in Highly Concentrated Protein Systems-Insight from Nuclear Magnetic Resonance Relaxometry. Int J Mol Sci 2023; 24:ijms24044093. [PMID: 36835511 PMCID: PMC9963861 DOI: 10.3390/ijms24044093] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/07/2023] [Accepted: 02/10/2023] [Indexed: 02/22/2023] Open
Abstract
1H spin-lattice relaxation experiments have been performed for water-Bovine Serum Albumin (BSA) mixtures, including 20%wt and 40%wt of BSA. The experiments have been carried out in a frequency range encompassing three orders of magnitude, from 10 kHz to 10 MHz, versus temperature. The relaxation data have been thoroughly analyzed in terms of several relaxation models with the purpose of revealing the mechanisms of water motion. For this purpose, four relaxation models have been used: the data have been decomposed into relaxation contributions expressed in terms of Lorentzian spectral densities, then three-dimensional translation diffusion has been assumed, next two-dimensional surface diffusion has been considered, and eventually, a model of surface diffusion mediated by acts of adsorption to the surface has been employed. In this way, it has been demonstrated that the last concept is the most plausible. Parameters describing the dynamics in a quantitative manner have been determined and discussed.
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Bouguet-Bonnet S, Giraud T, Stefan L, Averlant-Petit MC, Canet D. On the Observation of 14N Quadrupole Resonance Transitions in Water Proton NMR Relaxometry Dispersion Curves: The Case of a Labile NH Grouping in a Semirigid Molecular Moiety. J Phys Chem B 2022; 126:7159-7165. [PMID: 36099394 DOI: 10.1021/acs.jpcb.2c05208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The electric field gradient tensor (considered here at the level of a nitrogen nucleus) can be described by two parameters: the largest element in the (X,Y,Z) principal axis system, denoted by VZZ (leading to the nuclear quadrupole coupling), and the asymmetry parameter η = (|VYY| - |VXX|)/|VZZ| with |VZZ| > |VYY| > |VXX|. The frequencies of the three nitrogen-14 nuclear quadrupole resonance (NQR) transitions depend on both parameters but, for sensitivity reasons, their determination may be especially difficult and time consuming. For a partly rigid NH grouping with a labile proton, water nuclear magnetic resonance (NMR) relaxometry curves may exhibit these three transitions (dubbed quadrupolar dips or quadrupole relaxation enhancement (QRE)), provided that the NH grouping belongs to a moiety possessing a sufficient degree of ordering. Their line shape leads to the correlation time describing mainly the motion of the NH grouping (the proton of which being in exchange with water protons), and their amplitude can be interpreted in terms of an effective NH distance. This approach is applied to a hydrogel, where separate NQR lines are observed for the different types of water existing in this system. Furthermore, the analysis of experimental data allows one to determine the nuclear quadrupole coupling in the protonated and deprotonated forms of this molecular moiety involving a labile NH grouping.
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Affiliation(s)
| | - Tristan Giraud
- UMR 7375 LCPM, Université de Lorraine, CNRS, F-54000 Nancy, France
| | - Loic Stefan
- UMR 7375 LCPM, Université de Lorraine, CNRS, F-54000 Nancy, France
| | | | - Daniel Canet
- UMR 7563 LEMTA, Université de Lorraine, CNRS, F-54000 Nancy, France
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Petit M, Leclercq M, Pierre S, Ruggiero MR, El Atifi M, Boutonnat J, Fries PH, Berger F, Lahrech H. Fast-field-cycling NMR at very low magnetic fields: water molecular dynamic biomarkers of glioma cell invasion and migration. NMR IN BIOMEDICINE 2022; 35:e4677. [PMID: 34961995 DOI: 10.1002/nbm.4677] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 12/11/2021] [Accepted: 12/15/2021] [Indexed: 06/14/2023]
Abstract
Our objective was to study NMR relaxometry of glioma invasion/migration at very low field (<2 mT) by fast-field-cycling NMR (FFC-NMR) and to decipher the pathophysiological processes of glioma that are responsible for relaxation changes in order to open a new diagnostic method that can be extended to imaging. The phenotypes of two new glioma mouse models, Glio6 and Glio96, were characterized by T2w -MRI, HE histology, Ki-67 immunohistochemistry (IHC) and CXCR4 RT-qPCR, and were compared with the U87 model. R1 dispersions of glioma tissues were acquired at low field (0.1 mT-0.8 T) ex vivo and were fitted with Lorentzian and power-law models to extract FFC biomarkers related to the molecular dynamics of water. In order to decipher relaxation changes, three main invasion/migration pathophysiological processes were studied: hypoxia, H2 O2 function and the water-channel aquaporin-4 (AQP4). Glio6 and Glio96 were characterized with invasion/migration phenotype and U87 with high cell proliferation as a solid glioma. At very low field, invasion/migration versus proliferation was characterized by a decrease in the relaxation-rate constant (ΔR1 ≈ -32% at 0.1 mT) and correlation time (≈-40%). These decreases corroborated the AQP4-IHC overexpression (Glio6/Glio96: +92%/+46%), suggesting rapid transcytolemmal water exchange, which was confirmed by the intracellular water-lifetime τIN decrease (ΔτIN ≈ -30%). In functional experiments, AQP4 expression, τIN and the relaxation-rate constant at very low field were all found to be sensitive to hypoxia and to H2 O2 stimuli. At very low field the role of water exchanges in relaxation modulation was confirmed, and for the first time it was linked to the glioma invasion/migration and to its main pathophysiological processes: hypoxia, H2 O2 redox signaling and AQP4 expression. The method appears appropriate to evaluate the effect of drugs that can target these pathophysiological mechanisms. Finally, FFC-NMR operating at low field is demonstrated to be sensitive to invasion glioma phenotype and can be straightforwardly extended to FFC-MRI as a new cancer invasion imaging method in the clinic.
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Affiliation(s)
- Manuel Petit
- BrainTech Lab INSERM U1205, Grenoble, France
- Grenoble Alpes University, France
| | - Maxime Leclercq
- BrainTech Lab INSERM U1205, Grenoble, France
- Grenoble Alpes University, France
| | - Sandra Pierre
- BrainTech Lab INSERM U1205, Grenoble, France
- Grenoble Alpes University, France
| | | | - Michèle El Atifi
- BrainTech Lab INSERM U1205, Grenoble, France
- Grenoble Alpes University, France
- Grenoble Hospital University (CHU), France
| | - Jean Boutonnat
- Grenoble Alpes University, France
- Grenoble Hospital University (CHU), France
| | | | - François Berger
- BrainTech Lab INSERM U1205, Grenoble, France
- Grenoble Alpes University, France
- Grenoble Hospital University (CHU), France
| | - Hana Lahrech
- BrainTech Lab INSERM U1205, Grenoble, France
- Grenoble Alpes University, France
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Fanost A, de Viguerie L, Ducouret G, Mériguet G, Walter P, Glanville H, Rollet AL, Jaber M. Connecting Rheological Properties and Molecular Dynamics of Egg-Tempera Paints based on Egg Yolk. Angew Chem Int Ed Engl 2022; 61:e202112108. [PMID: 34816554 DOI: 10.1002/anie.202112108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Indexed: 11/11/2022]
Abstract
Egg-tempera painting is a pictorial technique widely used in the Middle Ages, although poorly studied in its physico-chemical aspects until now. Here we show how NMR relaxometry and rheology can be combined to probe egg-tempera paints and shed new light on their structure and behavior. Based on recipes of the 15th century, model formulations with egg yolk and green earth have been reproduced to characterize the physicochemical properties of this paint at the mesoscopic and macroscopic scales. The rheological measurements highlight a synergetic effect between green earth and egg yolk, induced by the interactions between them and the structural organisation of the system. 1 H NMR relaxometry emphasizes the presence and the structure of a network formed by the yolk and the pigment.
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Affiliation(s)
- Agathe Fanost
- Laboratoire d'Archéologie Moléculaire et Structurale LAMS, Sorbonne Université, CNRS, Institut Universitaire de France, 4 pl. Jussieu, F-75005, Paris, France.,laboratoire PHysico-chimie des Electrolytes et Nanosystèmes InterfaciauX, PHENIX, Sorbonne Université, CNRS, 4 pl. Jussieu, F-75005, Paris, France
| | - Laurence de Viguerie
- Laboratoire d'Archéologie Moléculaire et Structurale LAMS, Sorbonne Université, CNRS, Institut Universitaire de France, 4 pl. Jussieu, F-75005, Paris, France
| | - Guylaine Ducouret
- Sciences et Ingénierie de la Matière Molle, ESPCI Paris, Université PSL, CNRS, Sorbonne Université, 75005, Paris, France
| | - Guillaume Mériguet
- laboratoire PHysico-chimie des Electrolytes et Nanosystèmes InterfaciauX, PHENIX, Sorbonne Université, CNRS, 4 pl. Jussieu, F-75005, Paris, France
| | - Philippe Walter
- Laboratoire d'Archéologie Moléculaire et Structurale LAMS, Sorbonne Université, CNRS, Institut Universitaire de France, 4 pl. Jussieu, F-75005, Paris, France
| | - Helen Glanville
- Laboratoire d'Archéologie Moléculaire et Structurale LAMS, Sorbonne Université, CNRS, Institut Universitaire de France, 4 pl. Jussieu, F-75005, Paris, France
| | - Anne-Laure Rollet
- laboratoire PHysico-chimie des Electrolytes et Nanosystèmes InterfaciauX, PHENIX, Sorbonne Université, CNRS, 4 pl. Jussieu, F-75005, Paris, France
| | - Maguy Jaber
- Laboratoire d'Archéologie Moléculaire et Structurale LAMS, Sorbonne Université, CNRS, Institut Universitaire de France, 4 pl. Jussieu, F-75005, Paris, France
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6
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Fanost A, Viguerie L, Ducouret G, Mériguet G, Walter P, Glanville H, Rollet A, Jaber M. Connecting Rheological Properties and Molecular Dynamics of Egg‐Tempera Paints based on Egg Yolk. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202112108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Agathe Fanost
- Laboratoire d'Archéologie Moléculaire et Structurale LAMS Sorbonne Université, CNRS, Institut Universitaire de France 4 pl. Jussieu F-75005 Paris France
- laboratoire PHysico-chimie des Electrolytes et Nanosystèmes InterfaciauX, PHENIX Sorbonne Université, CNRS 4 pl. Jussieu F-75005 Paris France
| | - Laurence Viguerie
- Laboratoire d'Archéologie Moléculaire et Structurale LAMS Sorbonne Université, CNRS, Institut Universitaire de France 4 pl. Jussieu F-75005 Paris France
| | - Guylaine Ducouret
- Sciences et Ingénierie de la Matière Molle ESPCI Paris, Université PSL CNRS Sorbonne Université 75005 Paris France
| | - Guillaume Mériguet
- laboratoire PHysico-chimie des Electrolytes et Nanosystèmes InterfaciauX, PHENIX Sorbonne Université, CNRS 4 pl. Jussieu F-75005 Paris France
| | - Philippe Walter
- Laboratoire d'Archéologie Moléculaire et Structurale LAMS Sorbonne Université, CNRS, Institut Universitaire de France 4 pl. Jussieu F-75005 Paris France
| | - Helen Glanville
- Laboratoire d'Archéologie Moléculaire et Structurale LAMS Sorbonne Université, CNRS, Institut Universitaire de France 4 pl. Jussieu F-75005 Paris France
| | - Anne‐Laure Rollet
- laboratoire PHysico-chimie des Electrolytes et Nanosystèmes InterfaciauX, PHENIX Sorbonne Université, CNRS 4 pl. Jussieu F-75005 Paris France
| | - Maguy Jaber
- Laboratoire d'Archéologie Moléculaire et Structurale LAMS Sorbonne Université, CNRS, Institut Universitaire de France 4 pl. Jussieu F-75005 Paris France
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7
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Belorizky E, Fries PH. Nuclear relaxation rate enhancement by a 14N quadrupole nucleus in a fluctuating electric-field gradient. J Chem Phys 2021; 155:184108. [PMID: 34773943 DOI: 10.1063/5.0069362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We consider the longitudinal quadrupole relaxation rate enhancement (QRE) of a 1H nucleus due to the time fluctuations of the local dipolar magnetic field created by a close quadrupole 14N nucleus, the electric-field gradient (EFG) Hamiltonian of which changes with time because of vibrations/distortions of its chemical environment. The QRE is analytically expressed as a linear combination of the cosine Fourier transforms of the three quantum time auto-correlation functions GAA(t) of the 14N spin components along the principal axes A = X, Y, and Z of the mean (time-averaged) EFG Hamiltonian. Denoting the three transition frequencies between the energy levels of this mean Hamiltonian by νA, the functions GAA(t) oscillate at frequencies νA + sA/(2π) with mono-exponential decays of relaxation times τA, where the frequency dynamic shifts sA and the relaxation times τA are closed expressions of the magnitude of the fluctuations of the instantaneous EFG Hamiltonian about its mean and of the characteristic fluctuation time. Thus, the theoretical QRE is the sum of three Lorentzian peaks centered at νA + sA/(2π) with full widths at half maxima 1/(πτA). The predicted peak widths are nearly equal. The predicted dynamic shifts of the peaks are much smaller than their widths and amazingly keep proportional to the transition frequencies νA for reasonably fast EFG fluctuations. The theory is further improved by correcting the transition frequencies by the 14N Zeeman effects of second order. It is successfully applied to reinterpret the QRE pattern measured by Broche, Ashcroft, and Lurie [Magn. Reson. Med. 68, 358 (2012)] in normal cartilage.
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Affiliation(s)
- Elie Belorizky
- Univ. Grenoble Alpes, CEA, Leti-DSYS, 38000 Grenoble, France
| | - Pascal H Fries
- Univ. Grenoble Alpes, CEA, IRIG-MEM, 38000 Grenoble, France
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Ozel B, Kruk D, Wojciechowski M, Osuch M, Oztop MH. Water Dynamics in Whey-Protein-Based Composite Hydrogels by Means of NMR Relaxometry. Int J Mol Sci 2021; 22:9672. [PMID: 34575838 PMCID: PMC8469572 DOI: 10.3390/ijms22189672] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 08/31/2021] [Accepted: 08/31/2021] [Indexed: 01/05/2023] Open
Abstract
Whey-protein-isolate-based composite hydrogels with encapsulated black carrot (Daucus carota) extract were prepared by heat-induced gelation. The hydrogels were blended with gum tragacanth, pectin and xanthan gum polysaccharides for modulating their properties. 1H spin-lattice relaxation experiments were performed in a broad frequency range, from 4 kHz to 30 MHz, to obtain insight into the influence of the different polysaccharides and of the presence of black carrot on dynamical properties of water molecules in the hydrogel network. The 1H spin-lattice relaxation data were decomposed into relaxation contributions associated with confined and free water fractions. The population of the confined water fraction and the value of the translation diffusion coefficient of water molecules in the vicinity of the macromolecular network were quantitatively determined on the basis of the relaxation data. Moreover, it was demonstrated that the translation diffusion is highly anisotropic (two-dimensional, 2D).
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Affiliation(s)
- Baris Ozel
- Department of Food Engineering, Middle East Technical University, Ankara 06800, Turkey; (B.O.); (M.H.O.)
- Department of Food Engineering, Ahi Evran University, Kirsehir 40100, Turkey
| | - Danuta Kruk
- Department of Physics & Biophysics, Faculty of Food Sciences, University of Warmia and Mazury in Olsztyn, Michala Oczapowskiego 4, 10-719 Olsztyn, Poland;
| | - Milosz Wojciechowski
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Sloneczna 54, 10-710 Olsztyn, Poland;
| | - Maciej Osuch
- Department of Physics & Biophysics, Faculty of Food Sciences, University of Warmia and Mazury in Olsztyn, Michala Oczapowskiego 4, 10-719 Olsztyn, Poland;
| | - Mecit Halil Oztop
- Department of Food Engineering, Middle East Technical University, Ankara 06800, Turkey; (B.O.); (M.H.O.)
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Broche LM, James Ross P, Kennedy BWC, MacEachern CF, Lurie DJ, Ashcroft GP. A new method for investigating osteoarthritis using Fast Field-Cycling nuclear magnetic resonance. Phys Med 2021; 88:142-147. [PMID: 34242886 PMCID: PMC8382587 DOI: 10.1016/j.ejmp.2021.05.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 05/14/2021] [Accepted: 05/25/2021] [Indexed: 10/25/2022] Open
Abstract
Osteoarthritis in synovial joints remains a major cause of long-term disability worldwide, with symptoms produced by the progressive deterioration of the articular cartilage. The earliest cartilage changes are thought to be alteration in its main protein components, namely proteoglycan and collagen. Loss of proteoglycans bound in the collagen matrix which maintain hydration and stiffness of the structure is followed by collagen degradation and loss. The development of new treatments for early osteoarthritis is limited by the lack of accurate biomarkers to assess the loss of proteoglycan. One potential biomarker is magnetic resonance imaging (MRI). We present the results of a novel MRI methodology, Fast Field-Cycling (FFC), to assess changes in critical proteins by demonstrating clear quantifiable differences in signal from normal and osteoarthritic human cartilage for in vitro measurements. We further tested proteoglycan extracted cartilage and the key components individually. Three clear signals were identified, two of which are related predominantly to the collagen component of cartilage and the third, a unique very short-lived signal, is directly related to proteoglycan content; we have not seen this in any other tissue type. In addition, we present the first volunteer human scan from our whole-body FFC scanner where articular cartilage measurements are in keeping with those we have shown in tissue samples. This new clinical imaging modality offers the prospect of non-invasive monitoring of human cartilage in vivo and hence the assessment of potential treatments for osteoarthritis. Keywords: Fast Field-Cycling NMR; human hyaline cartilage; Osteoarthritis; T1 dispersion; quadrupolar peaks; protein interactions.
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Affiliation(s)
- Lionel M Broche
- Aberdeen Biomedical Imaging Centre, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK
| | - P James Ross
- Aberdeen Biomedical Imaging Centre, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK.
| | - Brett W C Kennedy
- Aberdeen Biomedical Imaging Centre, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK
| | - Campbell F MacEachern
- Aberdeen Biomedical Imaging Centre, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK
| | - David J Lurie
- Aberdeen Biomedical Imaging Centre, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK
| | - George P Ashcroft
- Aberdeen Biomedical Imaging Centre, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK
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11
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Baroni S, Stefania R, Broche LM, Senn N, Lurie DJ, Ross PJ, Aime S, Geninatti Crich S. A Novel Class of
1
H‐MRI Contrast Agents Based on the Relaxation Enhancement Induced on Water Protons by
14
N‐Containing Imidazole Moieties. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202011513] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Simona Baroni
- Department of Molecular Biotechnology and Health Sciences University of Torino via Nizza 52 10126 Torino Italy
| | - Rachele Stefania
- Department of Molecular Biotechnology and Health Sciences University of Torino via Nizza 52 10126 Torino Italy
| | - Lionel M. Broche
- Aberdeen Biomedical Imaging Centre University of Aberdeen Foresterhill AB25 2ZD Aberdeen UK
| | - Nicholas Senn
- Aberdeen Biomedical Imaging Centre University of Aberdeen Foresterhill AB25 2ZD Aberdeen UK
| | - David J. Lurie
- Aberdeen Biomedical Imaging Centre University of Aberdeen Foresterhill AB25 2ZD Aberdeen UK
| | - P. James Ross
- Aberdeen Biomedical Imaging Centre University of Aberdeen Foresterhill AB25 2ZD Aberdeen UK
| | - Silvio Aime
- Department of Molecular Biotechnology and Health Sciences University of Torino via Nizza 52 10126 Torino Italy
- Istituto di Biostrutture e Bioimmagini (IBB) CNR via Nizza 52 10126 Torino Italy
| | - Simonetta Geninatti Crich
- Department of Molecular Biotechnology and Health Sciences University of Torino via Nizza 52 10126 Torino Italy
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12
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Conte P, Cinquanta L, Lo Meo P, Mazza F, Micalizzi A, Corona O. Fast field cycling NMR relaxometry as a tool to monitor Parmigiano Reggiano cheese ripening. Food Res Int 2021; 139:109845. [DOI: 10.1016/j.foodres.2020.109845] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 10/21/2020] [Accepted: 10/22/2020] [Indexed: 11/16/2022]
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13
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Di Gregorio E, Bitonto V, Baroni S, Stefania R, Aime S, Broche LM, Senn N, Ross PJ, Lurie DJ, Geninatti Crich S. Monitoring tissue implants by field-cycling 1H-MRI via the detection of changes in the 14N-quadrupolar-peak from imidazole moieties incorporated in a "smart" scaffold material. J Mater Chem B 2021; 9:4863-4872. [PMID: 34095943 DOI: 10.1039/d1tb00775k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study is focused on the development of innovative sensors to non-invasively monitor the tissue implant status by Fast-Field-Cycling Magnetic Resonance Imaging (FFC-MRI). These sensors are based on oligo-histidine moieties that are conjugated to PLGA polymers representing the structural matrix for cells hosting scaffolds. The presence of 14N atoms of histidine causes a quadrupolar relaxation enhancement (also called Quadrupolar Peak, QP) at 1.39 MHz. This QP falls at a frequency well distinct from the QPs generated by endogenous semisolid proteins. The relaxation enhancement is pH dependent in the range 6.5-7.5, thus it acts as a reporter of the scaffold integrity as it progressively degrades upon lowering the microenvironmental pH. The ability of this new sensors to generate contrast in an image obtained at 1.39 MHz on a FFC-MRI scanner is assessed. A good biocompatibility of the histidine-containing scaffolds is observed after its surgical implantation in healthy mice. Over time the scaffold is colonized by endogenous fibroblasts and this process is accompanied by a progressive decrease of the intensity of the relaxation peak. In respect to the clinically used contrast agents this material has the advantage of generating contrast without the use of potentially toxic paramagnetic metal ions.
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Affiliation(s)
- Enza Di Gregorio
- Department of Molecular Biotechnology and Health Sciences, University of Torino, via Nizza 52, Torino, Italy.
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14
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Overbeck V, Appelhagen A, Rößler R, Niemann T, Ludwig R. Rotational correlation times, diffusion coefficients and quadrupolar peaks of the protic ionic liquid ethylammonium nitrate by means of 1H fast field cycling NMR relaxometry. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114983] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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15
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Baroni S, Stefania R, Broche LM, Senn N, Lurie DJ, Ross PJ, Aime S, Geninatti Crich S. A Novel Class of
1
H‐MRI Contrast Agents Based on the Relaxation Enhancement Induced on Water Protons by
14
N‐Containing Imidazole Moieties. Angew Chem Int Ed Engl 2020; 60:4208-4214. [DOI: 10.1002/anie.202011513] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 10/14/2020] [Indexed: 01/12/2023]
Affiliation(s)
- Simona Baroni
- Department of Molecular Biotechnology and Health Sciences University of Torino via Nizza 52 10126 Torino Italy
| | - Rachele Stefania
- Department of Molecular Biotechnology and Health Sciences University of Torino via Nizza 52 10126 Torino Italy
| | - Lionel M. Broche
- Aberdeen Biomedical Imaging Centre University of Aberdeen Foresterhill AB25 2ZD Aberdeen UK
| | - Nicholas Senn
- Aberdeen Biomedical Imaging Centre University of Aberdeen Foresterhill AB25 2ZD Aberdeen UK
| | - David J. Lurie
- Aberdeen Biomedical Imaging Centre University of Aberdeen Foresterhill AB25 2ZD Aberdeen UK
| | - P. James Ross
- Aberdeen Biomedical Imaging Centre University of Aberdeen Foresterhill AB25 2ZD Aberdeen UK
| | - Silvio Aime
- Department of Molecular Biotechnology and Health Sciences University of Torino via Nizza 52 10126 Torino Italy
- Istituto di Biostrutture e Bioimmagini (IBB) CNR via Nizza 52 10126 Torino Italy
| | - Simonetta Geninatti Crich
- Department of Molecular Biotechnology and Health Sciences University of Torino via Nizza 52 10126 Torino Italy
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16
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Masiewicz E, Ashcroft GP, Boddie D, Dundas SR, Kruk D, Broche LM. Towards applying NMR relaxometry as a diagnostic tool for bone and soft tissue sarcomas: a pilot study. Sci Rep 2020; 10:14207. [PMID: 32848198 PMCID: PMC7449965 DOI: 10.1038/s41598-020-71067-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 07/22/2020] [Indexed: 01/26/2023] Open
Abstract
This work explores what Fast Field-Cycling Nuclear Magnetic Resonance (FFC-NMR) relaxometry brings for the study of sarcoma to guide future in vivo analyses of patients. We present the results of an ex vivo pilot study involving 10 cases of biopsy-proven sarcoma and we propose a quantitative method to analyse 1H NMR relaxation dispersion profiles based on a model-free approach describing the main dynamical processes in the tissues and assessing the amplitude of the Quadrupole Relaxation Enhancement effects due to 14N. This approach showed five distinct groups of dispersion profiles indicating five discrete categories of sarcoma, with differences attributable to microstructure and rigidity. Data from tissues surrounding sarcomas indicated very significant variations with the proximity to tumour, which may be attributed to varying water content but also to tissue remodelling processes due to the sarcoma. This pilot study illustrates the potential of FFC relaxometry for the detection and characterisation of sarcoma.
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Affiliation(s)
- Elzbieta Masiewicz
- Department of Physics and Biophysics, Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Słoneczna 54, 10-710, Olsztyn, Poland
- Faculty of Food Sciences, University of Warmia and Mazury in Olsztyn, Michała Oczapowskiego 4, 10-719, Olsztyn, Poland
| | - George P Ashcroft
- Department of Orthopaedics, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen, AB25 2ZD, Scotland, UK
| | - David Boddie
- Department of Orthopaedics, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen, AB25 2ZD, Scotland, UK
| | - Sinclair R Dundas
- Department of Pathology, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen, AB25 2ZD, Scotland, UK
| | - Danuta Kruk
- Department of Physics and Biophysics, Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Słoneczna 54, 10-710, Olsztyn, Poland
| | - Lionel M Broche
- Bio-Medical Physics, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen, AB25 2ZD, Scotland, UK.
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17
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Pizzanelli S, Monti S, Gordeeva LG, Solovyeva MV, Freni A, Forte C. A close view of the organic linker in a MOF: structural insights from a combined 1H NMR relaxometry and computational investigation. Phys Chem Chem Phys 2020; 22:15222-15230. [PMID: 32601632 DOI: 10.1039/d0cp01863e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The organic linker in a metal organic framework (MOF) affects its adsorption behavior and performance, and its structure and dynamics play a role in the modulation of the adsorption properties. In this work, the combination of 1H nuclear magnetic resonance (NMR) longitudinal relaxometry and theoretical calculations allowed details of the structure and dynamics of the organic linker in the NH2-MIL-125 MOF to be obtained. In particular, fast field cycling (FFC) NMR, applied here for the first time on MOFs, was used to disclose the dynamics of the amino group and its electronic environment through the analysis of the 14N quadrupole relaxation peaks, observed in the frequency interval 0.5-5 MHz, at different temperatures from 25 to 110 °C. The line width of the peaks allowed a lower boundary on the rotational correlation time of the N-H bonds to be set, whereas relevant changes in the amplitudes were interpreted in terms of a change in the orientation of the 14N averaged electric field gradient tensor. The experimental findings were complemented by quantum chemistry calculations and classical molecular dynamics simulations.
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Affiliation(s)
- Silvia Pizzanelli
- CNR-ICCOM, Institute of the Chemistry of Organometallic Compounds, via G. Moruzzi 1, 56124 Pisa, Italy.
| | - Susanna Monti
- CNR-ICCOM, Institute of the Chemistry of Organometallic Compounds, via G. Moruzzi 1, 56124 Pisa, Italy.
| | - Larisa G Gordeeva
- Boreskov Institute of Catalysis, Ac. Lavrentiev av. 5, Novosibirsk 630090, Russia and Novosibirsk State University, Pirogova str. 1, Novosibirsk 630090, Russia
| | - Marina V Solovyeva
- Boreskov Institute of Catalysis, Ac. Lavrentiev av. 5, Novosibirsk 630090, Russia and Novosibirsk State University, Pirogova str. 1, Novosibirsk 630090, Russia
| | - Angelo Freni
- CNR-ICCOM, Institute of the Chemistry of Organometallic Compounds, via G. Moruzzi 1, 56124 Pisa, Italy.
| | - Claudia Forte
- CNR-ICCOM, Institute of the Chemistry of Organometallic Compounds, via G. Moruzzi 1, 56124 Pisa, Italy.
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18
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Kruk D, Masiewicz E, Wojciechowski M, Florek-Wojciechowska M, Broche LM, Lurie DJ. Slow dynamics of solid proteins - Nuclear magnetic resonance relaxometry versus dielectric spectroscopy. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2020; 314:106721. [PMID: 32276108 DOI: 10.1016/j.jmr.2020.106721] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 03/17/2020] [Accepted: 03/18/2020] [Indexed: 06/11/2023]
Abstract
1H Nuclear Magnetic Resonance (NMR) relaxometry and Dielectric Spectroscopy (DS) have been exploited to investigate the dynamics of solid proteins. The experiments have been carried out in the frequency range of about 10 kHz-40 MHz for NMR relaxometry and 10-2Hz-20 MHz for DS. The data sets have been analyzed in terms of theoretical models allowing for a comparison of the correlation times revealed by NMR relaxometry and DS. The 1H spin-lattice relaxation profiles have been decomposed into relaxation contributions associated with 1H-1H and 1H-14N dipole - dipole interactions. The 1H-1H relaxation contribution has been interpreted in terms of three dynamical processes of time scales of 10-6s, 10-7s and 10-8s. It has turned out that the correlation times do not differ much among proteins and they are only weakly dependent on temperature. The analysis of DS relaxation spectra has also revealed three motional processes characterized by correlation times that considerably depend on temperature in contrast to those obtained from the 1H relaxation. This finding suggest that for solid proteins there is a contribution to the 1H spin-lattice relaxation associated with a kind of motion that is not probed in DS as it does not lead to a reorientation of the electric dipole moment.
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Affiliation(s)
- Danuta Kruk
- Faculty of Mathematics and Computer Science, University of Warmia & Mazury in Olsztyn, Słoneczna 54, 10-710 Olsztyn, Poland.
| | - Elzbieta Masiewicz
- Faculty of Mathematics and Computer Science, University of Warmia & Mazury in Olsztyn, Słoneczna 54, 10-710 Olsztyn, Poland
| | - Milosz Wojciechowski
- Faculty of Mathematics and Computer Science, University of Warmia & Mazury in Olsztyn, Słoneczna 54, 10-710 Olsztyn, Poland
| | | | - Lionel M Broche
- Bio-Medical Physics, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, Scotland, United Kingdom
| | - David J Lurie
- Bio-Medical Physics, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, Scotland, United Kingdom
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19
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Abbas H, Broche LM, Ezdoglian A, Li D, Yuecel R, James Ross P, Cheyne L, Wilson HM, Lurie DJ, Dawson DK. Fast field-cycling magnetic resonance detection of intracellular ultra-small iron oxide particles in vitro: Proof-of-concept. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2020; 313:106722. [PMID: 32248086 PMCID: PMC7167511 DOI: 10.1016/j.jmr.2020.106722] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 03/19/2020] [Accepted: 03/20/2020] [Indexed: 06/11/2023]
Abstract
PURPOSE Inflammation is central in disease pathophysiology and accurate methods for its detection and quantification are increasingly required to guide diagnosis and therapy. Here we explored the ability of Fast Field-Cycling Magnetic Resonance (FFC-MR) in quantifying the signal of ultra-small superparamagnetic iron oxide particles (USPIO) phagocytosed by J774 macrophage-like cells as a proof-of-principle. METHODS Relaxation rates were measured in suspensions of J774 macrophage-like cells loaded with USPIO (0-200 μg/ml Fe as ferumoxytol), using a 0.25 T FFC benchtop relaxometer and a human whole-body, in-house built 0.2 T FFC-MR prototype system with a custom test tube coil. Identical non-imaging, saturation recovery pulse sequence with 90° flip angle and 20 different evolution fields selected logarithmically between 80 μT and 0.2 T (3.4 kHz and 8.51 MHz proton Larmor frequency [PLF] respectively). Results were compared with imaging flow cytometry quantification of side scatter intensity and USPIO-occupied cell area. A reference colorimetric iron assay was used. RESULTS The T1 dispersion curves derived from FFC-MR were excellent in detecting USPIO at all concentrations examined (0-200 μg/ml Fe as ferumoxytol) vs. control cells, p ≤ 0.001. FFC-NMR was capable of reliably detecting cellular iron content as low as 1.12 ng/µg cell protein, validated using a colorimetric assay. FFC-MR was comparable to imaging flow cytometry quantification of side scatter intensity but superior to USPIO-occupied cell area, the latter being only sensitive at exposures ≥ 10 µg/ml USPIO. CONCLUSIONS We demonstrated for the first time that FFC-MR is capable of quantitative assessment of intra-cellular iron which will have important implications for the use of USPIO in a variety of biological applications, including the study of inflammation.
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Affiliation(s)
- Hassan Abbas
- Aberdeen Cardiovascular and Diabetes Centre, University of Aberdeen, Aberdeen, United Kingdom.
| | - Lionel M Broche
- Bio-Medical Physics, School of Medicine, University of Aberdeen, Aberdeen, United Kingdom
| | - Aiarpi Ezdoglian
- Iain Fraser Cytometry Centre, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, United Kingdom; Department of Medical Chemistry and Toxicology, NI Pirogov Russian National Research Medical University, Moscow 117997, Russian Federation(1)
| | - Dmitriy Li
- Iain Fraser Cytometry Centre, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, United Kingdom
| | - Raif Yuecel
- Iain Fraser Cytometry Centre, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, United Kingdom; Cytomics Centre, College of Life and Environmental Sciences, University of Exeter, EX4 4QD, United Kingdom(1)
| | - P James Ross
- Bio-Medical Physics, School of Medicine, University of Aberdeen, Aberdeen, United Kingdom
| | - Lesley Cheyne
- Aberdeen Cardiovascular and Diabetes Centre, University of Aberdeen, Aberdeen, United Kingdom
| | - Heather M Wilson
- Aberdeen Cardiovascular and Diabetes Centre, University of Aberdeen, Aberdeen, United Kingdom
| | - David J Lurie
- Bio-Medical Physics, School of Medicine, University of Aberdeen, Aberdeen, United Kingdom
| | - Dana K Dawson
- Aberdeen Cardiovascular and Diabetes Centre, University of Aberdeen, Aberdeen, United Kingdom.
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20
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Dynamics of Solid Proteins by Means of Nuclear Magnetic Resonance Relaxometry. Biomolecules 2019; 9:biom9110652. [PMID: 31731514 PMCID: PMC6920843 DOI: 10.3390/biom9110652] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/16/2019] [Accepted: 10/19/2019] [Indexed: 01/21/2023] Open
Abstract
1H Nuclear magnetic resonance (NMR) relaxometry was exploited to investigate the dynamics of solid proteins. The relaxation experiments were performed at 37 °C over a broad frequency range, from approximately 10 kHz to 40 MHz. Two relaxation contributions to the overall 1H spin-lattice relaxation were revealed; they were associated with 1H-1H and 1H-14N magnetic dipole-dipole interactions, respectively. The 1H-1H relaxation contribution was interpreted in terms of three dynamical processes occurring on timescales of 10-6 s, 10-7 s, and 10-8 s, respectively. The 1H-14N relaxation contribution shows quadrupole relaxation enhancement effects. A thorough analysis of the data was performed revealing similarities in the protein dynamics, despite their different structures. Among several parameters characterizing the protein dynamics and structure (e.g., electric field gradient tensor at the position of 14N nuclei), the orientation of the 1H-14N dipole-dipole axis, with respect to the principal axis system of the electric field gradient, was determined, showing that, for lysozyme, it was considerably different than for the other proteins. Moreover, the validity range of a closed form expression describing the 1H-14N relaxation contribution was determined by a comparison with a general approach based on the stochastic Liouville equation.
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21
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A whole-body Fast Field-Cycling scanner for clinical molecular imaging studies. Sci Rep 2019; 9:10402. [PMID: 31320653 PMCID: PMC6639535 DOI: 10.1038/s41598-019-46648-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 06/03/2019] [Indexed: 12/14/2022] Open
Abstract
Fast Field-Cycling (FFC) is a well-established Nuclear Magnetic Resonance (NMR) technique that exploits varying magnetic fields to quantify molecular motion over a wide range of time scales, providing rich structural information from nanometres to micrometres, non-invasively. Previous work demonstrated great potential for FFC-NMR biomarkers in medical applications; our research group has now ported this technology to medical imaging by designing a whole-body FFC Magnetic Resonance Imaging (FFC-MRI) scanner capable of performing accurate measurements non-invasively over the entire body, using signals from water and fat protons. This is a unique tool to explore new biomarkers related to disease-induced tissue remodelling. Our approach required making radical changes in the design, construction and control of MRI hardware so that the magnetic field is switched within 12.5 ms to reach any field strength from 50 μT to 0.2 T, providing clinically useful images within minutes. Pilot studies demonstrated endogenous field-dependant contrast in biological tissues in good agreement with reference data from other imaging modalities, confirming that our system can perform multiscale structural imaging of biological tissues, from nanometres to micrometres. It is now possible to confirm ex vivo results obtained from previous clinical studies, offering applications in diagnosis, staging and monitoring treatment for cancer, stroke, osteoarthritis and oedema.
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22
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Kruk D, Umut E, Masiewicz E, Fischer R, Scharfetter H. Multi-quantum quadrupole relaxation enhancement effects in 209Bi compounds. J Chem Phys 2019; 150:184309. [PMID: 31091937 DOI: 10.1063/1.5082007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
1H spin-lattice nuclear magnetic resonance relaxation experiments have been performed for triphenylbismuth dichloride (C18H15BiCl2) and phenylbismuth dichloride (C6H5BiCl2) in powder. The frequency range of 20-128 MHz has been covered. Due to 1H-209Bi dipole-dipole interactions, a rich set of pronounced Quadrupole Relaxation Enhancement (QRE) peaks (quadrupole peaks) has been observed. The QRE patterns for both compounds have been explained in terms of single- and double-quantum transitions of the participating nuclei. The analysis has revealed a complex, quantum-mechanical mechanism of the QRE effects. The mechanism goes far beyond the simple explanation of the existence of three quadrupole peaks for 14N reported in literature. The analysis has been supported by nuclear quadrupole resonance results that independently provided the 209Bi quadrupole parameters (amplitude of the quadrupole coupling constant and asymmetry parameter).
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Affiliation(s)
- D Kruk
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Słoneczna 54, PL-10710 Olsztyn, Poland
| | - E Umut
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Słoneczna 54, PL-10710 Olsztyn, Poland
| | - E Masiewicz
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Słoneczna 54, PL-10710 Olsztyn, Poland
| | - R Fischer
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9/V, A-8010 Graz, Austria
| | - H Scharfetter
- Institute of Medical Engineering, Graz University of Technology, Stremayrgasse 16/III, A-8010 Graz, Austria
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23
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Bödenler M, de Rochefort L, Ross PJ, Chanet N, Guillot G, Davies GR, Gösweiner C, Scharfetter H, Lurie DJ, Broche LM. Comparison of fast field-cycling magnetic resonance imaging methods and future perspectives. Mol Phys 2018. [DOI: 10.1080/00268976.2018.1557349] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Markus Bödenler
- Institute of Medical Engineering, Graz University of Technology, Graz, Austria
| | - Ludovic de Rochefort
- CNRS, Center for Magnetic Resonance in Biology and Medicine (CRMBM) UMR 7339, Aix Marseille Univ, Marseille, France
| | - P. James Ross
- Aberdeen Biomedical Imaging Centre, University of Aberdeen, Aberdeen, UK
| | - Nicolas Chanet
- Imagerie par Résonance Magnétique Médicale et Multi-Modalités, IR4M UMR 8081, Université Paris Saclay, Orsay, France
| | - Geneviève Guillot
- Imagerie par Résonance Magnétique Médicale et Multi-Modalités, IR4M UMR 8081, Université Paris Saclay, Orsay, France
| | - Gareth R. Davies
- Aberdeen Biomedical Imaging Centre, University of Aberdeen, Aberdeen, UK
| | - Christian Gösweiner
- Institute of Medical Engineering, Graz University of Technology, Graz, Austria
| | - Hermann Scharfetter
- Institute of Medical Engineering, Graz University of Technology, Graz, Austria
| | - David J. Lurie
- Aberdeen Biomedical Imaging Centre, University of Aberdeen, Aberdeen, UK
| | - Lionel M. Broche
- Aberdeen Biomedical Imaging Centre, University of Aberdeen, Aberdeen, UK
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24
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Zampetoulas V, Lurie DJ, Broche LM. Correction of environmental magnetic fields for the acquisition of Nuclear magnetic relaxation dispersion profiles below Earth's field. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2017; 282:38-46. [PMID: 28759741 DOI: 10.1016/j.jmr.2017.07.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 07/14/2017] [Accepted: 07/20/2017] [Indexed: 06/07/2023]
Abstract
T1 relaxation times can be measured at a range of magnetic field strengths by Fast Field-Cycling (FFC) NMR relaxometry to provide T1-dispersion curves. These are valuable tools for the investigation of material properties as they provide information about molecular dynamics non-invasively. However, accessing information at fields below 230 μT (10kHz proton Larmor frequency) requires careful correction of unwanted environmental magnetic fields. In this work a novel method is proposed that compensates for the environmental fields on a FFC-NMR relaxometer and extends the acquisition of Nuclear Magnetic Relaxation Dispersion profiles to 2.3μT (extremely low field region), with direct application in the study of slow molecular motions. Our method is an improvement of an existing technique, reported by Anoardo and Ferrante in 2003, which exploits the non-adiabatic behaviour of the magnetisation in rapidly-varying magnetic fields and makes use of the oscillation of the signal amplitude to estimate the field strength. This increases the accuracy in measuring the environmental fields and allows predicting the optimal correction values by applying simple equations to fit the data acquired. Validation of the method is performed by comparisons with well-known dispersion curves obtained from polymers and benzene.
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Affiliation(s)
- Vasileios Zampetoulas
- Aberdeen Biomedical Imaging Centre, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, AB25 2ZD, Aberdeen, United Kingdom.
| | - David J Lurie
- Aberdeen Biomedical Imaging Centre, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, AB25 2ZD, Aberdeen, United Kingdom.
| | - Lionel M Broche
- Aberdeen Biomedical Imaging Centre, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, AB25 2ZD, Aberdeen, United Kingdom.
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