1
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Yang J, Xin R, Lehmkuhl S, Korvink JG, Brandner JJ. Development of a fully automated workstation for conducting routine SABRE hyperpolarization. Sci Rep 2024; 14:21022. [PMID: 39251663 PMCID: PMC11384770 DOI: 10.1038/s41598-024-71354-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Accepted: 08/27/2024] [Indexed: 09/11/2024] Open
Abstract
SABRE is emerging as a fast, simple and low-cost hyperpolarization method because of its ability to regenerate enhanced NMR signals. Generally, SABRE hyperpolarization has been performed predominantly manually, leading to variations in reproducibility and efficiency. Recent advances in SABRE include the development of automated shuttling systems to address previous inconsistencies. However, the operational complexity of such systems and the challenges of integration with existing workflows hinder their widespread adoption. This work presents a fully automated lab workstation based on a benchtop NMR spectrometer, specifically designed to facilitate SABRE of different nuclei across different polarization fields. We demonstrated the capability of this system through a series of routine SABRE experimental protocols, including consecutive SABRE hyperpolarization with high reproducibility (average standard deviation of 1.03%), optimization polarization of 13C nuclei respect to the polarization transfer field, and measurement of polarization buildup rate or decay time across a wide range of magnetic fields. Furthermore, we have iteratively optimized the durations for pulsed SABRE-SHEATH 13C pyruvate. The constructed SABRE workstation offers full automation, high reproducibility, and functional diversification, making it a practical tool for conducting routine SABRE hyperpolarization experiments. It provides a robust platform for high-throughput and reliable SABRE and X-SABRE hyperpolarization studies.
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Affiliation(s)
- Jing Yang
- Karlsruhe Institute of Technology (KIT), Institute of Microstructure Technology (IMT), 76344, Eggenstein-Leopoldshafen, Germany
| | - Ruodong Xin
- Karlsruhe Institute of Technology (KIT), Institute of Microstructure Technology (IMT), 76344, Eggenstein-Leopoldshafen, Germany
| | - Sören Lehmkuhl
- Karlsruhe Institute of Technology (KIT), Institute of Microstructure Technology (IMT), 76344, Eggenstein-Leopoldshafen, Germany
| | - Jan G Korvink
- Karlsruhe Institute of Technology (KIT), Institute of Microstructure Technology (IMT), 76344, Eggenstein-Leopoldshafen, Germany
| | - Jürgen J Brandner
- Karlsruhe Institute of Technology (KIT), Institute of Microstructure Technology (IMT), 76344, Eggenstein-Leopoldshafen, Germany.
- Karlsruhe Nano Micro Facility (KNMFi), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
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2
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Barskiy DA. Molecules, Up Your Spins! Molecules 2024; 29:1821. [PMID: 38675641 PMCID: PMC11052189 DOI: 10.3390/molecules29081821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Accepted: 04/08/2024] [Indexed: 04/28/2024] Open
Abstract
Nuclear magnetic resonance (NMR) spectroscopy and magnetic resonance imaging (MRI) are indispensable tools in science and medicine, offering insights into the functions of biological processes [...].
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Affiliation(s)
- Danila A. Barskiy
- Institut für Physik, Johannes-Gutenberg-Universität Mainz, 55128 Mainz, Germany;
- Helmholtz Institut Mainz, 55128 Mainz, Germany
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
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3
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Luu QS, Nguyen QT, Manh HN, Yun S, Kim J, Do UT, Jeong K, Lee SU, Lee Y. SABRE hyperpolarization of nicotinamide derivatives and their molecular dynamics properties. Analyst 2024; 149:1068-1073. [PMID: 38265242 DOI: 10.1039/d3an02053c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
Signal amplification by reversible exchange hyperpolarization explores the chemical structure and kinetic properties of nicotinamide derivatives. N-Benzyl nicotinamide and nicotinic acid hydrazide compounds display relatively fast dissociation rates of approximately 7-8 s-1 and long proton T1 relaxation times of 5-20 s, respectively. Consequently, these substrates exhibit remarkable signal enhancements, reaching approximately 175 and 102 fold, respectively, underscoring the efficacy of the hyperpolarization technique in elucidating the behavior of these compounds.
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Affiliation(s)
- Quy Son Luu
- Department of Bionano Technology, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan 15588, South Korea.
| | - Quynh Thi Nguyen
- Department of Applied Chemistry, Hanyang University, Ansan 15588, South Korea
| | - Hung Ngo Manh
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16149, South Korea.
| | - Seokki Yun
- Department of Applied Chemistry, Hanyang University, Ansan 15588, South Korea
| | - Jiwon Kim
- Department of Bionano Technology, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan 15588, South Korea.
| | - Uyen Thi Do
- Department of Bionano Technology, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan 15588, South Korea.
| | - Keunhong Jeong
- Department of Chemistry, Korea Military Academy, Seoul, 01805, South Korea.
| | - Sang Uck Lee
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16149, South Korea.
| | - Youngbok Lee
- Department of Bionano Technology, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan 15588, South Korea.
- Department of Applied Chemistry, Hanyang University, Ansan 15588, South Korea
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4
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Assaf CD, Gui X, Auer AA, Duckett SB, Hövener JB, Pravdivtsev AN. J Coupling Constants of <1 Hz Enable 13C Hyperpolarization of Pyruvate via Reversible Exchange of Parahydrogen. J Phys Chem Lett 2024; 15:1195-1203. [PMID: 38271215 PMCID: PMC10860132 DOI: 10.1021/acs.jpclett.3c02980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2024]
Abstract
Observing pyruvate metabolism in vivo has become a focal point of molecular magnetic resonance imaging. Signal amplification by reversible exchange (SABRE) has recently emerged as a versatile hyperpolarization technique. Tuning of the spin order transfer (SOT) in SABRE is challenging as the small 1H-13C J couplings, in the 13C-pyruvate case, result in SOT being not readily discernible. We demonstrate an experimental method using frequency-selective excitation of parahydrogen-derived polarization SOT sequence (SEPP-SPINEPT); its application led to up to 5700-fold 13C signal gain. In this way, we estimated the lifetime of two Ir-pyruvate SABRE complexes alongside the individual probing of eight small 1H-13C J couplings that connect the hydride protons in these complexes to 1- and 2-13C pyruvate spins, affording values between 0 and 2.69 Hz. Using electronic structure calculations, we define the low-energy structure of the corresponding complexes. Hence, this study demonstrates a novel approach to analyzing the spin topology of short-lived organometallic complexes.
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Affiliation(s)
- Charbel D Assaf
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center Kiel, Kiel University, Am Botanischen Garten 14, 24118 Kiel, Germany
| | - Xin Gui
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Alexander A Auer
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Simon B Duckett
- Centre for Hyperpolarization in Magnetic Resonance (CHyM), University of York, Heslington YO10 5NY, U.K
| | - Jan-Bernd Hövener
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center Kiel, Kiel University, Am Botanischen Garten 14, 24118 Kiel, Germany
| | - Andrey N Pravdivtsev
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center Kiel, Kiel University, Am Botanischen Garten 14, 24118 Kiel, Germany
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5
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Tickner BJ, Dennington M, Collins BG, Gater CA, Tanner TFN, Whitwood AC, Rayner PJ, Watts DP, Duckett SB. Metal-Mediated Catalytic Polarization Transfer from para Hydrogen to 3,5-Dihalogenated Pyridines. ACS Catal 2024; 14:994-1004. [PMID: 38269038 PMCID: PMC10804365 DOI: 10.1021/acscatal.3c05378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 12/13/2023] [Accepted: 12/15/2023] [Indexed: 01/26/2024]
Abstract
The neutral catalysts [IrCl(H)2(NHC)(substrate)2] or [IrCl(H)2(NHC)(substrate)(sulfoxide)] are used to transfer polarization from para hydrogen (pH2) to 3,5-dichloropyridine and 3,5-dibromopyridine substrates. This is achieved in a rapid, reversible, and low-cost process that relies on ligand exchange within the active catalyst. Notably, the sulfoxide-containing catalyst systems produced NMR signal enhancements between 1 and 2 orders of magnitude larger than its unmodified counterpart. Consequently, this signal amplification by reversible exchange hyperpolarization method can boost the 1H, 13C, and 15N nuclear magnetic resonance (NMR) signal intensities by factors up to 4350, 1550, and 46,600, respectively (14.0, 1.3, and 15.4% polarization). In this paper, NMR and X-ray crystallography are used to map the evolution of catalytically important species and provide mechanistic rational for catalytic efficiency. Furthermore, applications in spontaneous radiofrequency amplification by stimulated emission and NMR reaction monitoring are also shown.
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Affiliation(s)
- Ben. J. Tickner
- Centre
for Hyperpolarisation in Magnetic Resonance, University of York, Heslington YO10 5NY, U.K.
- Department
of Chemistry, University of York, Heslington YO10 5DD, U.K.
| | - Marcus Dennington
- Centre
for Hyperpolarisation in Magnetic Resonance, University of York, Heslington YO10 5NY, U.K.
- Department
of Chemistry, University of York, Heslington YO10 5DD, U.K.
| | - Benjamin G. Collins
- Centre
for Hyperpolarisation in Magnetic Resonance, University of York, Heslington YO10 5NY, U.K.
- Department
of Chemistry, University of York, Heslington YO10 5DD, U.K.
- Department
of Physics, Engineering and Technology, University of York, Heslington YO10 5DD, U.K.
| | - Callum A. Gater
- Centre
for Hyperpolarisation in Magnetic Resonance, University of York, Heslington YO10 5NY, U.K.
- Department
of Chemistry, University of York, Heslington YO10 5DD, U.K.
| | - Theo F. N. Tanner
- Department
of Chemistry, University of York, Heslington YO10 5DD, U.K.
| | | | - Peter J. Rayner
- Centre
for Hyperpolarisation in Magnetic Resonance, University of York, Heslington YO10 5NY, U.K.
- Department
of Chemistry, University of York, Heslington YO10 5DD, U.K.
| | - Daniel P. Watts
- Department
of Physics, Engineering and Technology, University of York, Heslington YO10 5DD, U.K.
| | - Simon B. Duckett
- Centre
for Hyperpolarisation in Magnetic Resonance, University of York, Heslington YO10 5NY, U.K.
- Department
of Chemistry, University of York, Heslington YO10 5DD, U.K.
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6
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Jagtap AP, Mamone S, Glöggler S. Molecular precursors to produce para-hydrogen enhanced metabolites at any field. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2023; 61:674-680. [PMID: 37821237 DOI: 10.1002/mrc.5402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 09/12/2023] [Accepted: 09/18/2023] [Indexed: 10/13/2023]
Abstract
Enhancing magnetic resonance signal via hyperpolarization techniques enables the real-time detection of metabolic transformations even in vivo. The use of para-hydrogen to enhance 13 C-enriched metabolites has opened a rapid pathway for the production of hyperpolarized metabolites, which usually requires specialized equipment. Metabolite precursors that can be hyperpolarized and converted into metabolites at any given field would open up opportunities for many labs to make use of this technology because already existing hardware could be used. We report here on the complete synthesis and hyperpolarization of suitable precursor molecules of the side-arm hydrogenation approach. The better accessibility to such side-arms promises that the para-hydrogen approach can be implemented in every lab with existing two channel NMR spectrometers for 1 H and 13 C independent of the magnetic field.
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Affiliation(s)
- Anil P Jagtap
- NMR Signal Enhancement Group, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
- Center for Biostructural Imaging of Neurodegeneration, University Medicine Göttingen, Göttingen, Germany
| | - Salvatore Mamone
- NMR Signal Enhancement Group, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
- Center for Biostructural Imaging of Neurodegeneration, University Medicine Göttingen, Göttingen, Germany
| | - Stefan Glöggler
- NMR Signal Enhancement Group, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
- Center for Biostructural Imaging of Neurodegeneration, University Medicine Göttingen, Göttingen, Germany
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7
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Peters JP, Brahms A, Janicaud V, Anikeeva M, Peschke E, Ellermann F, Ferrari A, Hellmold D, Held-Feindt J, Kim NM, Meiser J, Aden K, Herges R, Hövener JB, Pravdivtsev AN. Nitrogen-15 dynamic nuclear polarization of nicotinamide derivatives in biocompatible solutions. SCIENCE ADVANCES 2023; 9:eadd3643. [PMID: 37611105 PMCID: PMC10446501 DOI: 10.1126/sciadv.add3643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 07/21/2023] [Indexed: 08/25/2023]
Abstract
Dissolution dynamic nuclear polarization (dDNP) increases the sensitivity of magnetic resonance imaging by more than 10,000 times, enabling in vivo metabolic imaging to be performed noninvasively in real time. Here, we are developing a group of dDNP polarized tracers based on nicotinamide (NAM). We synthesized 1-15N-NAM and 1-15N nicotinic acid and hyperpolarized them with dDNP, reaching (13.0 ± 1.9)% 15N polarization. We found that the lifetime of hyperpolarized 1-15N-NAM is strongly field- and pH-dependent, with T1 being as long as 41 s at a pH of 12 and 1 T while as short as a few seconds at neutral pH and fields below 1 T. The remarkably short 1-15N lifetime at low magnetic fields and neutral pH drove us to establish a unique pH neutralization procedure. Using 15N dDNP and an inexpensive rodent imaging probe designed in-house, we acquired a 15N MRI of 1-15N-NAM (previously hyperpolarized for more than an hour) in less than 1 s.
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Affiliation(s)
- Josh P. Peters
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center Kiel, Kiel University, Am Botanischen Garten 14, 24118 Kiel, Germany
| | - Arne Brahms
- Otto Diels Institute for Organic Chemistry, Kiel University, Otto-Hahn Platz 4, 24098 Kiel, Germany
| | - Vivian Janicaud
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center Kiel, Kiel University, Am Botanischen Garten 14, 24118 Kiel, Germany
| | - Maria Anikeeva
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center Kiel, Kiel University, Am Botanischen Garten 14, 24118 Kiel, Germany
| | - Eva Peschke
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center Kiel, Kiel University, Am Botanischen Garten 14, 24118 Kiel, Germany
| | - Frowin Ellermann
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center Kiel, Kiel University, Am Botanischen Garten 14, 24118 Kiel, Germany
| | - Arianna Ferrari
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center Kiel, Kiel University, Am Botanischen Garten 14, 24118 Kiel, Germany
| | - Dana Hellmold
- Department of Neurosurgery, University Medical Center Kiel, Arnold-Heller-Str. 3, House D, 24105 Kiel, Germany
| | - Janka Held-Feindt
- Department of Neurosurgery, University Medical Center Kiel, Arnold-Heller-Str. 3, House D, 24105 Kiel, Germany
| | - Na-mi Kim
- Institute of Clinical Molecular Biology, Kiel University, Rosalind-Franklin-Straße 12, 24105 Kiel, Germany
| | - Johannes Meiser
- Cancer Metabolism Group, Department of Cancer Research, Luxembourg Institute of Health, 6A Rue Nicolas-Ernest Barblé, 1210 Luxembourg, Luxembourg
| | - Konrad Aden
- Institute of Clinical Molecular Biology, Kiel University, Rosalind-Franklin-Straße 12, 24105 Kiel, Germany
- Department of Internal Medicine I, University Medical Center Kiel, Kiel, Germany
| | - Rainer Herges
- Otto Diels Institute for Organic Chemistry, Kiel University, Otto-Hahn Platz 4, 24098 Kiel, Germany
| | - Jan-Bernd Hövener
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center Kiel, Kiel University, Am Botanischen Garten 14, 24118 Kiel, Germany
| | - Andrey N. Pravdivtsev
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center Kiel, Kiel University, Am Botanischen Garten 14, 24118 Kiel, Germany
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8
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Put P, Alcicek S, Bondar O, Bodek Ł, Duckett S, Pustelny S. Detection of pyridine derivatives by SABRE hyperpolarization at zero field. Commun Chem 2023; 6:131. [PMID: 37349558 DOI: 10.1038/s42004-023-00928-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 06/09/2023] [Indexed: 06/24/2023] Open
Abstract
Nuclear magnetic resonance (NMR) spectroscopy is a powerful analytical tool used in modern science and technology. Its novel incarnation, based on measurements of NMR signals without external magnetic fields, provides direct access to intramolecular interactions based on heteronuclear scalar J-coupling. The uniqueness of these interactions makes each zero-field NMR spectrum distinct and useful in chemical fingerprinting. However, the necessity of heteronuclear coupling often results in weak signals due to the low abundance of certain nuclei (e.g., 15N). Hyperpolarization of such compounds may solve the problem. In this work, we investigate molecules with natural isotopic abundance that are polarized using non-hydrogenative parahydrogen-induced polarization. We demonstrate that spectra of hyperpolarized naturally abundant pyridine derivatives can be observed and uniquely identified whether the same substituent is placed at a different position of the pyridine ring or different constituents are placed at the same position. To do so, we constructed an experimental system using a home-built nitrogen vapor condenser, which allows for consistent long-term measurements, crucial for identifying naturally abundant hyperpolarized molecules at a concentration level of ~1 mM. This opens avenues for future chemical detection of naturally abundant compounds using zero-field NMR.
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Affiliation(s)
- Piotr Put
- Institute of Physics, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University in Kraków, Kraków, 30-348, Poland.
| | - Seyma Alcicek
- Institute of Physics, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University in Kraków, Kraków, 30-348, Poland.
- Goethe University Frankfurt, University Hospital, Institute of Neuroradiology, Frankfurt am Main, 60528, Germany.
| | - Oksana Bondar
- Institute of Physics, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University in Kraków, Kraków, 30-348, Poland
- Department of Chemistry, Taras Shevchenko National University of Kyiv, Kyiv, 01601, Ukraine
| | - Łukasz Bodek
- Institute of Physics, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University in Kraków, Kraków, 30-348, Poland
| | - Simon Duckett
- Centre for Hyperpolarization in Magnetic Resonance (CHyM), University of York, Heslington, YO10 5NY, UK
| | - Szymon Pustelny
- Institute of Physics, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University in Kraków, Kraków, 30-348, Poland
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9
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Lins J, Miloslavina YA, Carrara SC, Rösler L, Hofmann S, Herr K, Theiß F, Wienands L, Avrutina O, Kolmar H, Buntkowsky G. Parahydrogen-induced polarization allows 2000-fold signal enhancement in biologically active derivatives of the peptide-based drug octreotide. Sci Rep 2023; 13:6388. [PMID: 37076553 PMCID: PMC10115808 DOI: 10.1038/s41598-023-33577-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 04/14/2023] [Indexed: 04/21/2023] Open
Abstract
Octreotide, a somatostatin analogue, has shown its efficacy for the diagnostics and treatment of various types of cancer, i.e., in octreotide scan, as radio-marker after labelling with a radiopharmaceutical. To avoid toxicity of radio-labeling, octreotide-based assays can be implemented into magnetic resonance techniques, such as MRI and NMR. Here we used a Parahydrogen-Induced Polarization (PHIP) approach as a cheap, fast and straightforward method. Introduction of L-propargyl tyrosine as a PHIP marker at different positions of octreotide by manual Solid-Phase Peptide Synthesis (SPPS) led to up to 2000-fold proton signal enhancement (SE). Cell binding studies confirmed that all octreotide variants retained strong binding affinity to the surface of human-derived cancer cells expressing somatostatin receptor 2. The hydrogenation reactions were successfully performed in methanol and under physiologically compatible mixtures of water with methanol or ethanol. The presented results open up new application areas of biochemical and pharmacological studies with octreotide.
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Affiliation(s)
- Jonas Lins
- Eduard-Zintl-Institute for Inorganic and Physical Chemistry, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, 64287, Darmstadt, Germany
| | - Yuliya A Miloslavina
- Eduard-Zintl-Institute for Inorganic and Physical Chemistry, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, 64287, Darmstadt, Germany
| | - Stefania C Carrara
- Clemens-Schöpf-Institute for Organic Chemistry and Biochemistry, Technische Universität Darmstadt, Alarich-Weiss-Straße 4, 64287, Darmstadt, Germany
| | - Lorenz Rösler
- Eduard-Zintl-Institute for Inorganic and Physical Chemistry, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, 64287, Darmstadt, Germany
| | - Sarah Hofmann
- Clemens-Schöpf-Institute for Organic Chemistry and Biochemistry, Technische Universität Darmstadt, Alarich-Weiss-Straße 4, 64287, Darmstadt, Germany
| | - Kevin Herr
- Eduard-Zintl-Institute for Inorganic and Physical Chemistry, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, 64287, Darmstadt, Germany
| | - Franziska Theiß
- Eduard-Zintl-Institute for Inorganic and Physical Chemistry, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, 64287, Darmstadt, Germany
| | - Laura Wienands
- Eduard-Zintl-Institute for Inorganic and Physical Chemistry, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, 64287, Darmstadt, Germany
| | - Olga Avrutina
- Clemens-Schöpf-Institute for Organic Chemistry and Biochemistry, Technische Universität Darmstadt, Alarich-Weiss-Straße 4, 64287, Darmstadt, Germany
| | - Harald Kolmar
- Clemens-Schöpf-Institute for Organic Chemistry and Biochemistry, Technische Universität Darmstadt, Alarich-Weiss-Straße 4, 64287, Darmstadt, Germany.
| | - Gerd Buntkowsky
- Eduard-Zintl-Institute for Inorganic and Physical Chemistry, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, 64287, Darmstadt, Germany.
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10
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Jeong HJ, Min S, Baek J, Kim J, Chung J, Jeong K. Real-Time Reaction Monitoring of Azide-Alkyne Cycloadditions Using Benchtop NMR-Based Signal Amplification by Reversible Exchange (SABRE). ACS MEASUREMENT SCIENCE AU 2023; 3:134-142. [PMID: 37090259 PMCID: PMC10120034 DOI: 10.1021/acsmeasuresciau.2c00065] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/30/2022] [Accepted: 01/03/2023] [Indexed: 05/03/2023]
Abstract
Rufinamide, possessing a triazole ring, is a new antiepileptic drug (AED) relatively well-absorbed in the lower dose range (10 mg/kg per day) and is currently being used in antiepileptic medications. Triazole derivatives can interact with various enzymes and receptors in biological systems via diverse non-covalent interactions, thus inducing versatile biological effects. Strain-promoted azide-alkyne cycloaddition (SPAAC) is a significant method for obtaining triazoles, even under physiological conditions, in the absence of a copper catalyst. To confirm the progress of chemical reactions under biological conditions, research on reaction monitoring at low concentrations is essential. This promising strategy is gaining acceptance for applications in fields such as drug development and nanoscience. We investigated the optimum Ir catalyst and magnetic field for achieving maximum proton hyperpolarization transfer in triazole derivatives. These reactions were analyzed using signal amplification by reversible exchange (SABRE) to overcome the limitations of low sensitivity in nuclear magnetic resonance spectroscopy, when monitoring copper-free click reactions in real time. Finally, a more versatile copper-catalyzed click reaction was monitored in real time, using a 60 MHz benchtop NMR system, in order to analyze the reaction mechanism.
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Affiliation(s)
- Hye Jin Jeong
- Department
of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Sein Min
- Department
of Chemistry, Seoul Women’s University, Seoul 01797, South Korea
| | - Juhee Baek
- Department
of Chemistry, Seoul Women’s University, Seoul 01797, South Korea
| | - Jisu Kim
- Department
of Chemistry, Seoul Women’s University, Seoul 01797, South Korea
| | - Jean Chung
- Department
of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Keunhong Jeong
- Department
of Physics and Chemistry, Korea Military
Academy, Seoul 01805, South Korea
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11
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Ellermann F, Saul P, Hövener JB, Pravdivtsev AN. Modern Manufacturing Enables Magnetic Field Cycling Experiments and Parahydrogen-Induced Hyperpolarization with a Benchtop NMR. Anal Chem 2023; 95:6244-6252. [PMID: 37018544 DOI: 10.1021/acs.analchem.2c03682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
Benchtop NMR (btNMR) spectrometers are revolutionizing the way we use NMR and lowering the cost drastically. Magnetic field cycling (MFC) experiments with precise timing and control over the magnetic field, however, were hitherto not available on btNMRs, although some systems exist for high-field, high-resolution NMR spectrometers. Still, the need and potential for btNMR MFC is great─e.g., to perform and analyze parahydrogen-induced hyperpolarization, another method that has affected analytical chemistry and NMR beyond expectations. Here, we describe a setup that enables MFC on btNMRs for chemical analysis and hyperpolarization. Taking full advantage of the power of modern manufacturing, including computer-aided design, three-dimensional printing, and microcontrollers, the setup is easy to reproduce, highly reliable, and easy to adjust and operate. Within 380 ms, the NMR tube was shuttled reliably from the electromagnet to the NMR isocenter (using a stepper motor and gear rod). We demonstrated the power of this setup by hyperpolarizing nicotinamide using signal amplification by reversible exchange (SABRE), a versatile method to hyperpolarize a broad variety of molecules including metabolites and drugs. Here, the standard deviation of SABRE hyperpolarization was between 0.2 and 3.3%. The setup also allowed us to investigate the field dependency of the polarization and the effect of different sample preparation protocols. We found that redissolution of the activated and dried Ir catalyst always reduced the polarization. We anticipate that this design will greatly accelerate the ascension of MFC experiments for chemical analysis with btNMR─adding yet another application to this rapidly developing field.
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Affiliation(s)
- Frowin Ellermann
- Section for Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center Schleswig-Holstein (UKSH), Kiel 24118, Germany
| | - Philip Saul
- Section for Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center Schleswig-Holstein (UKSH), Kiel 24118, Germany
| | - Jan-Bernd Hövener
- Section for Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center Schleswig-Holstein (UKSH), Kiel 24118, Germany
| | - Andrey N Pravdivtsev
- Section for Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center Schleswig-Holstein (UKSH), Kiel 24118, Germany
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12
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Stevanato G, Ding Y, Mamone S, Jagtap AP, Korchak S, Glöggler S. Real-Time Pyruvate Chemical Conversion Monitoring Enabled by PHIP. J Am Chem Soc 2023; 145:5864-5871. [PMID: 36857108 PMCID: PMC10021011 DOI: 10.1021/jacs.2c13198] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
In recent years, parahydrogen-induced polarization side arm hydrogenation (PHIP-SAH) has been applied to hyperpolarize [1-13C]pyruvate and map its metabolic conversion to [1-13C]lactate in cancer cells. Developing on our recent MINERVA pulse sequence protocol, in which we have achieved 27% [1-13C]pyruvate carbon polarization, we demonstrate the hyperpolarization of [1,2-13C]pyruvate (∼7% polarization on each 13C spin) via PHIP-SAH. By altering a single parameter in the pulse sequence, MINERVA enables the signal enhancement of C1 and/or C2 in [1,2-13C]pyruvate with the opposite phase, which allows for the simultaneous monitoring of different chemical reactions with enhanced spectral contrast or for the same reaction via different carbon sites. We first demonstrate the ability to monitor the same enzymatic pyruvate to lactate conversion at 7T in an aqueous solution, in vitro, and in-cell (HeLa cells) via different carbon sites. In a second set of experiments, we use the C1 and C2 carbon positions as spectral probes for simultaneous chemical reactions: the production of acetate, carbon dioxide, bicarbonate, and carbonate by reacting [1,2-13C]pyruvate with H2O2 at a high temperature (55 °C). Importantly, we detect and characterize the intermediate 2-hydroperoxy-2-hydroxypropanoate in real time and at high temperature.
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Affiliation(s)
- Gabriele Stevanato
- NMR Signal Enhancement Group, Max Planck Institute for Multidisciplinary Sciences, Am Fassberg 11, 37077 Göttingen, Germany.,Center for Biostructural Imaging of Neurodegeneration of the University Medical Center Göttingen, Von-Siebold-Street 3A, 37075 Göttingen, Germany
| | - Yonghong Ding
- NMR Signal Enhancement Group, Max Planck Institute for Multidisciplinary Sciences, Am Fassberg 11, 37077 Göttingen, Germany.,Center for Biostructural Imaging of Neurodegeneration of the University Medical Center Göttingen, Von-Siebold-Street 3A, 37075 Göttingen, Germany
| | - Salvatore Mamone
- NMR Signal Enhancement Group, Max Planck Institute for Multidisciplinary Sciences, Am Fassberg 11, 37077 Göttingen, Germany.,Center for Biostructural Imaging of Neurodegeneration of the University Medical Center Göttingen, Von-Siebold-Street 3A, 37075 Göttingen, Germany
| | - Anil P Jagtap
- NMR Signal Enhancement Group, Max Planck Institute for Multidisciplinary Sciences, Am Fassberg 11, 37077 Göttingen, Germany.,Center for Biostructural Imaging of Neurodegeneration of the University Medical Center Göttingen, Von-Siebold-Street 3A, 37075 Göttingen, Germany
| | - Sergey Korchak
- NMR Signal Enhancement Group, Max Planck Institute for Multidisciplinary Sciences, Am Fassberg 11, 37077 Göttingen, Germany.,Center for Biostructural Imaging of Neurodegeneration of the University Medical Center Göttingen, Von-Siebold-Street 3A, 37075 Göttingen, Germany
| | - Stefan Glöggler
- NMR Signal Enhancement Group, Max Planck Institute for Multidisciplinary Sciences, Am Fassberg 11, 37077 Göttingen, Germany.,Center for Biostructural Imaging of Neurodegeneration of the University Medical Center Göttingen, Von-Siebold-Street 3A, 37075 Göttingen, Germany
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13
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Negroni M, Kurzbach D. Missing Pieces in Structure Puzzles: How Hyperpolarized NMR Spectroscopy Can Complement Structural Biology and Biochemistry. Chembiochem 2023; 24:e202200703. [PMID: 36624049 DOI: 10.1002/cbic.202200703] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/08/2023] [Accepted: 01/09/2023] [Indexed: 01/11/2023]
Abstract
Structure determination lies at the heart of many biochemical research programs. However, the "giants": X-ray diffraction, electron microscopy, molecular dynamics simulations, and nuclear magnetic resonance, among others, leave quite a few dark spots on the structural pictures drawn of proteins, nucleic acids, membranes, and other biomacromolecules. For example, structural models under physiological conditions or of short-lived intermediates often remain out of reach of the established experimental methods. This account frames the possibility of including hyperpolarized, that is, dramatically signal-enhanced NMR in existing workflows to fill these spots with detailed depictions. We highlight how integrating methods based on dissolution dynamic nuclear polarization can provide valuable complementary information about formerly inaccessible conformational spaces for many systems. A particular focus will be on hyperpolarized buffers to facilitate the NMR structure determination of challenging systems.
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Affiliation(s)
- Mattia Negroni
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna, Währinger Str. 38, 1090, Vienna, Austria
| | - Dennis Kurzbach
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna, Währinger Str. 38, 1090, Vienna, Austria
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14
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Eills J, Budker D, Cavagnero S, Chekmenev EY, Elliott SJ, Jannin S, Lesage A, Matysik J, Meersmann T, Prisner T, Reimer JA, Yang H, Koptyug IV. Spin Hyperpolarization in Modern Magnetic Resonance. Chem Rev 2023; 123:1417-1551. [PMID: 36701528 PMCID: PMC9951229 DOI: 10.1021/acs.chemrev.2c00534] [Citation(s) in RCA: 64] [Impact Index Per Article: 64.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Indexed: 01/27/2023]
Abstract
Magnetic resonance techniques are successfully utilized in a broad range of scientific disciplines and in various practical applications, with medical magnetic resonance imaging being the most widely known example. Currently, both fundamental and applied magnetic resonance are enjoying a major boost owing to the rapidly developing field of spin hyperpolarization. Hyperpolarization techniques are able to enhance signal intensities in magnetic resonance by several orders of magnitude, and thus to largely overcome its major disadvantage of relatively low sensitivity. This provides new impetus for existing applications of magnetic resonance and opens the gates to exciting new possibilities. In this review, we provide a unified picture of the many methods and techniques that fall under the umbrella term "hyperpolarization" but are currently seldom perceived as integral parts of the same field. Specifically, before delving into the individual techniques, we provide a detailed analysis of the underlying principles of spin hyperpolarization. We attempt to uncover and classify the origins of hyperpolarization, to establish its sources and the specific mechanisms that enable the flow of polarization from a source to the target spins. We then give a more detailed analysis of individual hyperpolarization techniques: the mechanisms by which they work, fundamental and technical requirements, characteristic applications, unresolved issues, and possible future directions. We are seeing a continuous growth of activity in the field of spin hyperpolarization, and we expect the field to flourish as new and improved hyperpolarization techniques are implemented. Some key areas for development are in prolonging polarization lifetimes, making hyperpolarization techniques more generally applicable to chemical/biological systems, reducing the technical and equipment requirements, and creating more efficient excitation and detection schemes. We hope this review will facilitate the sharing of knowledge between subfields within the broad topic of hyperpolarization, to help overcome existing challenges in magnetic resonance and enable novel applications.
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Affiliation(s)
- James Eills
- Institute
for Bioengineering of Catalonia, Barcelona
Institute of Science and Technology, 08028Barcelona, Spain
| | - Dmitry Budker
- Johannes
Gutenberg-Universität Mainz, 55128Mainz, Germany
- Helmholtz-Institut,
GSI Helmholtzzentrum für Schwerionenforschung, 55128Mainz, Germany
- Department
of Physics, UC Berkeley, Berkeley, California94720, United States
| | - Silvia Cavagnero
- Department
of Chemistry, University of Wisconsin, Madison, Madison, Wisconsin53706, United States
| | - Eduard Y. Chekmenev
- Department
of Chemistry, Integrative Biosciences (IBio), Karmanos Cancer Institute
(KCI), Wayne State University, Detroit, Michigan48202, United States
- Russian
Academy of Sciences, Moscow119991, Russia
| | - Stuart J. Elliott
- Molecular
Sciences Research Hub, Imperial College
London, LondonW12 0BZ, United Kingdom
| | - Sami Jannin
- Centre
de RMN à Hauts Champs de Lyon, Université
de Lyon, CNRS, ENS Lyon, Université Lyon 1, 69100Villeurbanne, France
| | - Anne Lesage
- Centre
de RMN à Hauts Champs de Lyon, Université
de Lyon, CNRS, ENS Lyon, Université Lyon 1, 69100Villeurbanne, France
| | - Jörg Matysik
- Institut
für Analytische Chemie, Universität
Leipzig, Linnéstr. 3, 04103Leipzig, Germany
| | - Thomas Meersmann
- Sir
Peter Mansfield Imaging Centre, University Park, School of Medicine, University of Nottingham, NottinghamNG7 2RD, United Kingdom
| | - Thomas Prisner
- Institute
of Physical and Theoretical Chemistry and Center of Biomolecular Magnetic
Resonance, Goethe University Frankfurt, , 60438Frankfurt
am Main, Germany
| | - Jeffrey A. Reimer
- Department
of Chemical and Biomolecular Engineering, UC Berkeley, and Materials Science Division, Lawrence Berkeley National
Laboratory, Berkeley, California94720, United States
| | - Hanming Yang
- Department
of Chemistry, University of Wisconsin, Madison, Madison, Wisconsin53706, United States
| | - Igor V. Koptyug
- International Tomography Center, Siberian
Branch of the Russian Academy
of Sciences, 630090Novosibirsk, Russia
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15
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Hune T, Mamone S, Schroeder H, Jagtap AP, Sternkopf S, Stevanato G, Korchak S, Fokken C, Müller CA, Schmidt AB, Becker D, Glöggler S. Metabolic Tumor Imaging with Rapidly Signal-Enhanced 1- 13 C-Pyruvate-d 3. Chemphyschem 2023; 24:e202200615. [PMID: 36106366 PMCID: PMC10092681 DOI: 10.1002/cphc.202200615] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/14/2022] [Indexed: 01/20/2023]
Abstract
The metabolism of malignant cells differs significantly from that of healthy cells and thus, it is possible to perform metabolic imaging to reveal not only the exact location of a tumor, but also intratumoral areas of high metabolic activity. Herein, we demonstrate the feasibility of metabolic tumor imaging using signal-enhanced 1-13 C-pyruvate-d3 , which is rapidly enhanced via para-hydrogen, and thus, the signal is amplified by several orders of magnitudes in less than a minute. Using as a model, human melanoma xenografts injected with signal-enhanced 1-13 C-pyruvate-d3, we show that the conversion of pyruvate into lactate can be monitored along with its kinetics, which could pave the way for rapidly detecting and monitoring changes in tumor metabolism.
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Affiliation(s)
- Theresa Hune
- NMR Signal Enhancement Group, Max Planck Institute for Multidisciplinary Sciences, Am Fassberg 11, 37077, Göttingen, Germany.,Center for Biostructural Imaging of Neurodegeneration of the University Medical Center Göttingen, Von-Siebold-Str. 3A, 37075, Göttigen, Germany
| | - Salvatore Mamone
- NMR Signal Enhancement Group, Max Planck Institute for Multidisciplinary Sciences, Am Fassberg 11, 37077, Göttingen, Germany.,Center for Biostructural Imaging of Neurodegeneration of the University Medical Center Göttingen, Von-Siebold-Str. 3A, 37075, Göttigen, Germany
| | - Henning Schroeder
- NMR Signal Enhancement Group, Max Planck Institute for Multidisciplinary Sciences, Am Fassberg 11, 37077, Göttingen, Germany.,Center for Biostructural Imaging of Neurodegeneration of the University Medical Center Göttingen, Von-Siebold-Str. 3A, 37075, Göttigen, Germany
| | - Anil P Jagtap
- NMR Signal Enhancement Group, Max Planck Institute for Multidisciplinary Sciences, Am Fassberg 11, 37077, Göttingen, Germany.,Center for Biostructural Imaging of Neurodegeneration of the University Medical Center Göttingen, Von-Siebold-Str. 3A, 37075, Göttigen, Germany
| | - Sonja Sternkopf
- NMR Signal Enhancement Group, Max Planck Institute for Multidisciplinary Sciences, Am Fassberg 11, 37077, Göttingen, Germany.,Center for Biostructural Imaging of Neurodegeneration of the University Medical Center Göttingen, Von-Siebold-Str. 3A, 37075, Göttigen, Germany
| | - Gabriele Stevanato
- NMR Signal Enhancement Group, Max Planck Institute for Multidisciplinary Sciences, Am Fassberg 11, 37077, Göttingen, Germany.,Center for Biostructural Imaging of Neurodegeneration of the University Medical Center Göttingen, Von-Siebold-Str. 3A, 37075, Göttigen, Germany
| | - Sergey Korchak
- NMR Signal Enhancement Group, Max Planck Institute for Multidisciplinary Sciences, Am Fassberg 11, 37077, Göttingen, Germany.,Center for Biostructural Imaging of Neurodegeneration of the University Medical Center Göttingen, Von-Siebold-Str. 3A, 37075, Göttigen, Germany
| | - Claudia Fokken
- Department of NMR-based Structural Biology, Max Planck Institute for Multidisciplinary Sciences, Am Fassberg 11, 37077, Göttingen, Germany
| | - Christoph A Müller
- German Cancer Consortium (DKTK), partner site Freiburg, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, Heidelberg, 69120, Germany.,Division of Medical Physics, Department of Radiology, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, German Cancer Consortium (DKTK), partner site Freiburg, Killianstr. 5a, Freiburg, 79106, Germany
| | - Andreas B Schmidt
- German Cancer Consortium (DKTK), partner site Freiburg, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, Heidelberg, 69120, Germany.,Division of Medical Physics, Department of Radiology, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, German Cancer Consortium (DKTK), partner site Freiburg, Killianstr. 5a, Freiburg, 79106, Germany.,Integrative Biosciences (Ibio), Department of Chemistry, Karmanos Cancer Institute (KCI), Wayne State University, 5101 Cass Ave, 48202, Detroit, MI, USA
| | - Dorothea Becker
- Department of NMR-based Structural Biology, Max Planck Institute for Multidisciplinary Sciences, Am Fassberg 11, 37077, Göttingen, Germany
| | - Stefan Glöggler
- NMR Signal Enhancement Group, Max Planck Institute for Multidisciplinary Sciences, Am Fassberg 11, 37077, Göttingen, Germany.,Center for Biostructural Imaging of Neurodegeneration of the University Medical Center Göttingen, Von-Siebold-Str. 3A, 37075, Göttigen, Germany
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16
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Trepakova AI, Skovpin IV, Chukanov NV, Salnikov OG, Chekmenev EY, Pravdivtsev AN, Hövener JB, Koptyug IV. Subsecond Three-Dimensional Nitrogen-15 Magnetic Resonance Imaging Facilitated by Parahydrogen-Based Hyperpolarization. J Phys Chem Lett 2022; 13:10253-10260. [PMID: 36301252 PMCID: PMC9983028 DOI: 10.1021/acs.jpclett.2c02705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Magnetic resonance imaging (MRI) provides unique information about the internal structure and function of living organisms in a non-invasive way. The use of conventional proton MRI for the observation of real-time metabolism is hampered by the dominant signals of water and fat, which are abundant in living organisms. Heteronuclear MRI in conjunction with the hyperpolarization methods does not encounter this issue. In this work, we polarized 15N nuclei of [15N1]fampridine (a drug used for the treatment of multiple sclerosis) to the level of 4% in nuclear magnetic resonance (NMR) experiments and 0.7% in MRI studies using spin-lock-induced crossing combined with signal amplification by reversible exchange. Consequently, three-dimensional 15N MRI of the hyperpolarized 15N-labeled drug was acquired in 0.1 s with a signal-to-noise ratio of 70. In addition, the NMR signal enhancements for 15N-enriched fampridine and fampridine with a natural abundance of 15N nuclei were compared and an explanation for their difference was proposed.
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Affiliation(s)
- Alexandra I. Trepakova
- International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk, 630090, Russia
- Novosibirsk State University, 2 Pirogova St., Novosibirsk, 630090, Russia
- Institute of Cytology and Genetics, SB RAS, 10 Acad. Lavrentiev Ave., Novosibirsk, 630090, Russia
| | - Ivan V. Skovpin
- International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk, 630090, Russia
| | - Nikita V. Chukanov
- International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk, 630090, Russia
- Novosibirsk State University, 2 Pirogova St., Novosibirsk, 630090, Russia
| | - Oleg G. Salnikov
- International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk, 630090, Russia
| | - Eduard Y. Chekmenev
- Department of Chemistry, Integrative Biosciences (Ibio), Karmanos Cancer Institute (KCI), Wayne State University, Detroit, Michigan, 48202, USA
- Russian Academy of Sciences (RAS), 14 Leninskiy Prospekt, Moscow, 119991, Russia
| | - Andrey N. Pravdivtsev
- Department of Radiology and Neuroradiology Section Biomedical Imaging, MOIN CC, Universitätsklinikum Schleswig-Holstein, Universität Kiel, 14 Am Botanischen Garten, Kiel, 24118, Germany
| | - Jan-Bernd Hövener
- Department of Radiology and Neuroradiology Section Biomedical Imaging, MOIN CC, Universitätsklinikum Schleswig-Holstein, Universität Kiel, 14 Am Botanischen Garten, Kiel, 24118, Germany
| | - Igor V. Koptyug
- International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk, 630090, Russia
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17
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Park H, Eriksson S, Warren WS, Wang Q. Design, synthesis and evaluation of 15N- and 13C-labeled molecular probes as hyperpolarized nitric oxide sensors. Bioorg Med Chem 2022; 72:116969. [PMID: 36029732 PMCID: PMC9648624 DOI: 10.1016/j.bmc.2022.116969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 08/09/2022] [Accepted: 08/16/2022] [Indexed: 11/02/2022]
Abstract
Nitric oxide (NO) is an important signaling molecule involved in a wide range of biological processes. Development of non-invasive, real-time detection of NO is greatly desired yet remains challenging. Here we report the design and development of novel 15N- and 13C-labeled NO-sensing probes for hyperpolarized nuclear magnetic resonance (HP-NMR) studies. These probes undergo selective and rapid reaction with NO to generate in situ AZO-products that can be monitored with distinguishable NMR signals as a read-out. This study also allows for a direct comparison of the 15N and 13C nuclei performances in hyperpolarized reaction-based probes. The simple and general SABRE-SHEATH hyperpolarization method works on the 15N- and 13C-NO-sensing probes. Measured long spin-lattice relaxation (T1) values, especially for 15N-NO probes, will allow for real-time reaction-based imaging of NO.
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Affiliation(s)
- Hyejin Park
- Department of Chemistry, Duke University, Durham, NC 27708, USA
| | - Shannon Eriksson
- Department of Chemistry, Duke University, Durham, NC 27708, USA; School of Medicine, Duke University, Durham, NC 27708, USA
| | - Warren S Warren
- Department of Chemistry, Duke University, Durham, NC 27708, USA; Department of Physics, Radiology and Biomedical Engineering, Duke University, Durham, NC 27708, USA.
| | - Qiu Wang
- Department of Chemistry, Duke University, Durham, NC 27708, USA.
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18
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Tickner BJ, Svensson SKM, Vaara J, Duckett SB. Toward Optimizing and Understanding Reversible Hyperpolarization of Lactate Esters Relayed from para-Hydrogen. J Phys Chem Lett 2022; 13:6859-6866. [PMID: 35861312 PMCID: PMC9340809 DOI: 10.1021/acs.jpclett.2c01442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The SABRE-Relay hyperpolarization method is used to enhance the 1H and 13C NMR signals of lactate esters, which find use in a wide range of medical, pharmaceutical, and food science applications. This is achieved by the indirect relay of magnetization from para-hydrogen, a spin isomer of dihydrogen, to OH-containing lactate esters via a SABRE-hyperpolarized NH intermediary. This delivers 1H and 13C NMR signal enhancements as high as 245- and 985-fold, respectively, which makes the lactate esters far more detectable using NMR. DFT-calculated J-couplings and spin dynamics simulations indicate that, while polarization can be transferred from the lactate OH to other 1H nuclei via the J-coupling network, incoherent mechanisms are needed to polarize the 13C nuclei at the 6.5 mT transfer field used. The resulting sensitivity boost is predicted to be of great benefit for the NMR detection and quantification of low concentrations (<mM) of lactate esters and could provide a useful precursor for the production of hyperpolarized lactate, a key metabolite.
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Affiliation(s)
- Ben J. Tickner
- Centre
for Hyperpolarisation in Magnetic Resonance, Department of Chemistry, University of York, Heslington, United Kingdom, YO10 5NY
- NMR
Research Unit, University of Oulu, P.O. Box 3000, FI-90014, Oulu, Finland
| | | | - Juha Vaara
- NMR
Research Unit, University of Oulu, P.O. Box 3000, FI-90014, Oulu, Finland
| | - Simon B. Duckett
- Centre
for Hyperpolarisation in Magnetic Resonance, Department of Chemistry, University of York, Heslington, United Kingdom, YO10 5NY
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19
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Rayner PJ, Fekete M, Gater CA, Ahwal F, Turner N, Kennerley AJ, Duckett SB. Real-Time High-Sensitivity Reaction Monitoring of Important Nitrogen-Cycle Synthons by 15N Hyperpolarized Nuclear Magnetic Resonance. J Am Chem Soc 2022; 144:8756-8769. [PMID: 35508182 PMCID: PMC9121385 DOI: 10.1021/jacs.2c02619] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Here, we show how
signal amplification by reversible exchange hyperpolarization
of a range of 15N-containing synthons can be used to enable
studies of their reactivity by 15N nuclear magnetic resonance
(NO2– (28% polarization), ND3 (3%), PhCH2NH2 (5%), NaN3 (3%),
and NO3– (0.1%)). A range of iridium-based
spin-polarization transfer catalysts are used, which for NO2– work optimally as an amino-derived carbene-containing
complex with a DMAP-d2 coligand. We harness
long 15N spin-order lifetimes to probe in situ reactivity
out to 3 × T1. In the case of NO2– (T1 17.7 s
at 9.4 T), we monitor PhNH2 diazotization in acidic solution.
The resulting diazonium salt (15N-T1 38 s) forms within 30 s, and its subsequent reaction with
NaN3 leads to the detection of hyperpolarized PhN3 (T1 192 s) in a second step via the
formation of an identified cyclic pentazole intermediate. The role
of PhN3 and NaN3 in copper-free click chemistry
is exemplified for hyperpolarized triazole (T1 < 10 s) formation when they react with a strained alkyne.
We also demonstrate simple routes to hyperpolarized N2 in
addition to showing how utilization of 15N-polarized PhCH2NH2 enables the probing of amidation, sulfonamidation,
and imine formation. Hyperpolarized ND3 is used to probe
imine and ND4+ (T1 33.6 s) formation. Furthermore, for NO2–, we also demonstrate how the 15N-magnetic resonance imaging
monitoring of biphasic catalysis confirms the successful preparation
of an aqueous bolus of hyperpolarized 15NO2– in seconds with 8% polarization. Hence, we create
a versatile tool to probe organic transformations that has significant
relevance for the synthesis of future hyperpolarized pharmaceuticals.
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Affiliation(s)
- Peter J Rayner
- Centre for Hyperpolarisation in Magnetic Resonance, Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Marianna Fekete
- Centre for Hyperpolarisation in Magnetic Resonance, Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Callum A Gater
- Centre for Hyperpolarisation in Magnetic Resonance, Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Fadi Ahwal
- Centre for Hyperpolarisation in Magnetic Resonance, Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Norman Turner
- Department of Engineering and Technology, University of Huddersfield, Queensgate, Huddersfield, West Yorkshire HD1 3DH, U.K
| | - Aneurin J Kennerley
- Centre for Hyperpolarisation in Magnetic Resonance, Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Simon B Duckett
- Centre for Hyperpolarisation in Magnetic Resonance, Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
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20
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Buntkowsky G, Theiss F, Lins J, Miloslavina YA, Wienands L, Kiryutin A, Yurkovskaya A. Recent advances in the application of parahydrogen in catalysis and biochemistry. RSC Adv 2022; 12:12477-12506. [PMID: 35480380 PMCID: PMC9039419 DOI: 10.1039/d2ra01346k] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 03/23/2022] [Indexed: 12/15/2022] Open
Abstract
Nuclear Magnetic Resonance (NMR) spectroscopy and Magnetic Resonance Imaging (MRI) are analytical and diagnostic tools that are essential for a very broad field of applications, ranging from chemical analytics, to non-destructive testing of materials and the investigation of molecular dynamics, to in vivo medical diagnostics and drug research. One of the major challenges in their application to many problems is the inherent low sensitivity of magnetic resonance, which results from the small energy-differences of the nuclear spin-states. At thermal equilibrium at room temperature the normalized population difference of the spin-states, called the Boltzmann polarization, is only on the order of 10-5. Parahydrogen induced polarization (PHIP) is an efficient and cost-effective hyperpolarization method, which has widespread applications in Chemistry, Physics, Biochemistry, Biophysics, and Medical Imaging. PHIP creates its signal-enhancements by means of a reversible (SABRE) or irreversible (classic PHIP) chemical reaction between the parahydrogen, a catalyst, and a substrate. Here, we first give a short overview about parahydrogen-based hyperpolarization techniques and then review the current literature on method developments and applications of various flavors of the PHIP experiment.
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Affiliation(s)
- Gerd Buntkowsky
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt Alarich-Weiss-Str. 8 D-64287 Darmstadt Germany
| | - Franziska Theiss
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt Alarich-Weiss-Str. 8 D-64287 Darmstadt Germany
| | - Jonas Lins
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt Alarich-Weiss-Str. 8 D-64287 Darmstadt Germany
| | - Yuliya A Miloslavina
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt Alarich-Weiss-Str. 8 D-64287 Darmstadt Germany
| | - Laura Wienands
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt Alarich-Weiss-Str. 8 D-64287 Darmstadt Germany
| | - Alexey Kiryutin
- International Tomography Center, Siberian Branch of the Russian Academy of Science Novosibirsk 630090 Russia
| | - Alexandra Yurkovskaya
- International Tomography Center, Siberian Branch of the Russian Academy of Science Novosibirsk 630090 Russia
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21
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Vaneeckhaute E, Tyburn JM, Kempf JG, Martens JA, Breynaert E. Isotopological Fingerprinting Using 1H/D Scrambling Identifies the Stereochemistry of Hyperpolarization Catalysts Transferring Spin Polarization from Parahydrogen to Substrates Using Signal Amplification by Reversible Exchange. J Phys Chem Lett 2022; 13:3516-3522. [PMID: 35420032 DOI: 10.1021/acs.jpclett.2c00185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Hyperpolarization using signal amplification by reversible exchange (SABRE) relies on target molecules and parahydrogen coordinating to a transition metal catalyst. Identification of this coordinated state becomes increasingly important, especially since bio-relevant targets such as pyruvate and amino acids exhibiting multiple binding sites are becoming compatible with SABRE. In this report, we present a fingerprinting method to discriminate and identify ligand binding sites without requiring the presence of a sensitive or isotope-labeled heteroatom. Adding a small concentration of protons to a deuterated medium, spontaneous 1H/D scrambling of exchangeable protons encodes the ligands each with an isotopological fingerprint. By use of rapid 2D zero quantum NMR, the binding sites are decoded from the hydrides in less than a minute. The new methodology is explained and demonstrated on Ir mixed complexes with pyridine, benzylamine, and ammonia as common N-functional ligands.
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Affiliation(s)
- Ewoud Vaneeckhaute
- COK-KAT, Centre for Surface Chemistry and Catalysis - Characterisation and Application Team, KULeuven, Celestijnenlaan 200F, Box 2461, B-3001 Leuven, Belgium
- NMRCoRe, NMR/X-ray Platform for Convergence Research, KULeuven, Celestijnenlaan 200F, Box 2461, B-3001 Leuven, Belgium
| | - Jean-Max Tyburn
- Bruker Biospin, 34 Rue de l'Industrie BP 10002, 67166 Cedex, Wissembourg, France
| | - James G Kempf
- Bruker Biospin, 15 Fortune Dr., Billerica, Massachusetts 01821, United States
| | - Johan A Martens
- COK-KAT, Centre for Surface Chemistry and Catalysis - Characterisation and Application Team, KULeuven, Celestijnenlaan 200F, Box 2461, B-3001 Leuven, Belgium
- NMRCoRe, NMR/X-ray Platform for Convergence Research, KULeuven, Celestijnenlaan 200F, Box 2461, B-3001 Leuven, Belgium
| | - Eric Breynaert
- COK-KAT, Centre for Surface Chemistry and Catalysis - Characterisation and Application Team, KULeuven, Celestijnenlaan 200F, Box 2461, B-3001 Leuven, Belgium
- NMRCoRe, NMR/X-ray Platform for Convergence Research, KULeuven, Celestijnenlaan 200F, Box 2461, B-3001 Leuven, Belgium
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22
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Fear EJ, Kennerley AJ, Rayner PJ, Norcott P, Roy SS, Duckett SB. SABRE hyperpolarized anticancer agents for use in
1
H MRI. Magn Reson Med 2022; 88:11-27. [PMID: 35253267 PMCID: PMC9310590 DOI: 10.1002/mrm.29166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 12/20/2021] [Accepted: 01/05/2022] [Indexed: 11/30/2022]
Abstract
Purpose Enabling drug tracking (distribution/specific pathways) with magnetic resonance spectroscopy requires manipulation (via hyperpolarization) of spin state populations and targets with sufficiently long magnetic lifetimes to give the largest possible window of observation. Here, we demonstrate how the proton resonances of a group of thienopyridazines (with known anticancer properties), can be amplified using the para‐hydrogen (p‐H2) based signal amplification by reversible exchange (SABRE) hyperpolarization technique. Methods Thienopyridazine isomers, including a 2H version, were synthesized in house. Iridium‐based catalysts dissolved in a methanol‐d4 solvent facilitated polarization transfer from p‐H2 gas to the target thienopyridazines. Subsequent SABRE 1H responses of hyperpolarized thienopyridazines were completed (400 MHz NMR). Pseudo‐singlet state approaches were deployed to extend magnetic state lifetimes. Proof of principle spectral‐spatial images were acquired across a range of field strengths (7T‐9.4T MRI). Results 1H‐NMR signal enhancements of −10,130‐fold at 9.4T (~33% polarization) were achieved on thieno[2,3‐d]pyridazine (T[2,3‐d]P), using SABRE under optimal mixing/field transfer conditions. 1H T1 lifetimes for the thienopyridazines were ~18‐50 s. Long‐lived state approaches extended the magnetic lifetime of target proton sites in T[2,3‐d]P from an average of 25‐40 seconds. Enhanced in vitro imaging (spatial and chemical shift based) of target T[2,3‐d]P was demonstrated. Conclusion Here, we demonstrate the power of SABRE to deliver a fast and cost‐effective route to hyperpolarization of important chemical motifs of anticancer agents. The SABRE approach outlined here lays the foundations for realizing continuous flow, hyperpolarized tracking of drug delivery/pathways.
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Affiliation(s)
| | - Aneurin J. Kennerley
- Centre for Hyperpolarisation in Magnetic Resonance (CHyM) University of York York United Kingdom
| | - Peter J. Rayner
- Centre for Hyperpolarisation in Magnetic Resonance (CHyM) University of York York United Kingdom
| | - Philip Norcott
- Research School of Chemistry Australian National University Canberra Australia
| | - Soumya S. Roy
- School of Chemistry University of Southampton Southampton United Kingdom
- Defence Science and Technology Laboratory (DSTL) Salisbury United Kingdom
| | - Simon B. Duckett
- Centre for Hyperpolarisation in Magnetic Resonance (CHyM) University of York York United Kingdom
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23
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Roy SS, Iali W, Moustafa GAI, Levitt MH. Tuning of pH enables carbon-13 hyperpolarization of oxalates by SABRE. Chem Commun (Camb) 2022; 58:2291-2294. [PMID: 35080536 DOI: 10.1039/d1cc06973j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nuclear spin hyperpolarization transforms typically weak NMR responses into strong signals paving the way for low-gamma nuclei detection within practical time-frames. SABRE (Signal Amplification by Reversible Exchange) is a particularly popular hyperpolarization technique due to its simplicity but the pool of molecules it can polarize is limited. The recent advancement in the form of co-ligands has made SABRE applicable towards molecules with O-donor sites e.g. pyruvate, a key step towards its potential clinical application. Here we explore the SABRE hyperpolarization of another compound with an alpha-keto motif, namely oxalate. We show that hyperpolarization of oxalate may be achieved by adjusting the pH in the presence of sulfoxide co-ligands. The SABRE effect for oxalate in methanol solutions is most effective for the mono-protonated form, which is dominant in the solution around pH ∼2.8. The polarization levels become markedly lower at both higher and lower pH. Employing 50% enriched pH2 we achieve up to 0.33% net 13C polarization in mono-protonated oxalate. In an alternative procedure we show that the hyperpolarization effect in oxalates can also be realised by synthesizing an esterified version of it, without any substantive pH implications. Further, the procedures to create hyperpolarized singlet orders in such substrates are also investigated.
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Affiliation(s)
- Soumya S Roy
- School of Chemistry, University of Southampton, University Road, Southampton, SO17 1BJ, UK. .,CBR Division, Defence Science and Technology Laboratory (Dstl), Porton Down, Salisbury, SP4 0JQ, UK
| | - Wissam Iali
- Department of Chemistry, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran 31261, Saudi Arabia. .,Center for Refining & Advanced Chemicals, Dhahran 31261, Saudi Arabia
| | - Gamal A I Moustafa
- School of Chemistry, University of Southampton, University Road, Southampton, SO17 1BJ, UK.
| | - Malcolm H Levitt
- School of Chemistry, University of Southampton, University Road, Southampton, SO17 1BJ, UK.
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24
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Saul P, Mamone S, Glöggler S. Hyperpolarization of 15N in an amino acid derivative. RSC Adv 2022; 12:2282-2286. [PMID: 35425247 PMCID: PMC8979135 DOI: 10.1039/d1ra08808d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 01/09/2022] [Indexed: 11/21/2022] Open
Abstract
Hyperpolarization is a nuclear magnetic resonance (NMR) technique which can be used to significantly enhance the signal in NMR experiments. In recent years, the possibility to enhance the NMR signal of heteronuclei by the use of para-hydrogen induced polarization (PHIP) has gained attention, especially in the area of possible applications in magnetic resonance imaging (MRI). Herein we introduce a way to synthesize a fully deuterated, 15N labelled amino acid derivative and the possibility to polarize the 15N by means of hydrogenation with para-hydrogen to a polarization level of 0.18%. The longevity of the polarization with a longitudinal relaxation time of more than a minute can allow for the observation of dynamic processes and metabolic imaging in vivo. In addition, we observe the phenomenon of proton–deuterium exchange with a homogeneous catalyst leading to signal enhanced allyl moeities in the precursor. A perdeuterated, 15N-labeled derivative of the amino acid glycine has been synthesized and polarized by means of para-hydrogen induced polarization (PHIP).![]()
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Affiliation(s)
- Philip Saul
- Research Group for NMR Signal Enhancement, Max Planck Institute for Biophysical Chemistry Am Fassberg 11 37 077 Göttingen Germany +49 551 3961 108.,Center for Biostructural Imaging of Neurodegeneration Von-Siebold-Straßze 3A 37 075 Göttingen Germany
| | - Salvatore Mamone
- Research Group for NMR Signal Enhancement, Max Planck Institute for Biophysical Chemistry Am Fassberg 11 37 077 Göttingen Germany +49 551 3961 108.,Center for Biostructural Imaging of Neurodegeneration Von-Siebold-Straßze 3A 37 075 Göttingen Germany
| | - Stefan Glöggler
- Research Group for NMR Signal Enhancement, Max Planck Institute for Biophysical Chemistry Am Fassberg 11 37 077 Göttingen Germany +49 551 3961 108.,Center for Biostructural Imaging of Neurodegeneration Von-Siebold-Straßze 3A 37 075 Göttingen Germany
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25
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Rapid SABRE Catalyst Scavenging Using Functionalized Silicas. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27020332. [PMID: 35056646 PMCID: PMC8778821 DOI: 10.3390/molecules27020332] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 12/16/2021] [Accepted: 12/21/2021] [Indexed: 02/07/2023]
Abstract
In recent years the NMR hyperpolarisation method signal amplification by reversible exchange (SABRE) has been applied to multiple substrates of potential interest for in vivo investigation. Unfortunately, SABRE commonly requires an iridium-containing catalyst that is unsuitable for biomedical applications. This report utilizes inductively coupled plasma-optical emission spectroscopy (ICP-OES) to investigate the potential use of metal scavengers to remove the iridium catalytic species from the solution. The most sensitive iridium emission line at 224.268 nm was used in the analysis. We report the effects of varying functionality, chain length, and scavenger support identity on iridium scavenging efficiency. The impact of varying the quantity of scavenger utilized is reported for the three scavengers with the highest iridium removed from initial investigations: 3-aminopropyl (S1), 3-(imidazole-1-yl)propyl (S4), and 2-(2-pyridyl) (S5) functionalized silica gels. Exposure of an activated SABRE sample (1.6 mg mL-1 of iridium catalyst) to 10 mg of the most promising scavenger (S5) resulted in <1 ppm of iridium being detectable by ICP-OES after 2 min of exposure. We propose that combining the approach described herein with other recently reported approaches, such as catalyst separated-SABRE (CASH-SABRE), would enable the rapid preparation of a biocompatible SABRE hyperpolarized bolus.
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26
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Tickner BJ, Komulainen S, Palosaari S, Heikkinen J, Lehenkari P, Zhivonitko VV, Telkki VV. Hyperpolarised NMR to aid molecular profiling of electronic cigarette aerosols. RSC Adv 2022; 12:1479-1485. [PMID: 35425197 PMCID: PMC8979170 DOI: 10.1039/d1ra07376a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 12/15/2021] [Indexed: 11/21/2022] Open
Abstract
Signal amplification by reversible exchange (SABRE) hyperpolarisation is used to enhance the NMR signals of nicotine and acrolein in methanol-d4 solutions of electronic cigarette aerosols. Consequently, detection of 74 μM nicotine is possible in just a single scan 1H NMR spectrum. The first example of an aldehyde hyperpolarised using SABRE is demonstrated and we work towards novel real-world applications of SABRE-hyperpolarised NMR for chemical analysis.
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Affiliation(s)
- Ben J Tickner
- NMR Research Unit, Faculty of Science, University of Oulu 90014 Finland
| | - Sanna Komulainen
- NMR Research Unit, Faculty of Science, University of Oulu 90014 Finland
| | - Sanna Palosaari
- Cancer and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu 90014 Finland
- Medical Research Center Oulu, Faculty of Medicine, University of Oulu and Oulu University Hospital 90014 Finland
| | - Janne Heikkinen
- Cancer and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu 90014 Finland
| | - Petri Lehenkari
- Cancer and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu 90014 Finland
- Medical Research Center Oulu, Faculty of Medicine, University of Oulu and Oulu University Hospital 90014 Finland
- Division of Orthopedic Surgery, Oulu University Hospital 90220 Finland
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27
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Norcott PL. Selective NMR detection of individual reaction components hyperpolarised by reversible exchange with para-hydrogen. Phys Chem Chem Phys 2022; 24:13527-13533. [DOI: 10.1039/d2cp01657e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
NMR spectroscopy can sometimes be hampered by two inherent weaknesses: low sensitivity and overlap of signals in complex mixtures. Hyperpolarisation techniques using para-hydrogen (including the method known as SABRE) can...
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28
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Jeong HJ, Min S, Kim S, Namgoong SK, Jeong K. Hyperpolarization study on remdesivir with its biological reaction monitoring via signal amplification by reversible exchange. RSC Adv 2022; 12:4377-4381. [PMID: 35425403 PMCID: PMC8981083 DOI: 10.1039/d2ra00062h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 01/20/2022] [Indexed: 12/22/2022] Open
Abstract
Our experiments indicate hyperpolarized proton signals in the entire structure of remdesivir are obtained due to a long-distance polarization transfer by para-hydrogen. SABRE-based biological real-time reaction monitoring, by using a protein enzyme under mild conditions is carried out. It represents the first successful para-hydrogen based hyperpolarization application in biological reaction monitoring. Hyperpolarized proton signals in the entire structure of remdesivir are obtained due to a long-distance polarization transfer by para-hydrogen. Biological real-time reaction monitoring, by using a protein enzyme under mild conditions is carried out.![]()
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Affiliation(s)
- Hye Jin Jeong
- Department of Physics and Chemistry, Korea Military Academy, Seoul 01805, South Korea
| | - Sein Min
- Department of Chemistry, Seoul Women's University, Seoul 01797, South Korea
| | - Sarah Kim
- Department of Chemistry, Seoul Women's University, Seoul 01797, South Korea
| | - Sung Keon Namgoong
- Department of Chemistry, Seoul Women's University, Seoul 01797, South Korea
| | - Keunhong Jeong
- Department of Physics and Chemistry, Korea Military Academy, Seoul 01805, South Korea
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29
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Joalland B, Theis T, Appelt S, Chekmenev EY. Background‐Free Proton NMR Spectroscopy with Radiofrequency Amplification by Stimulated Emission Radiation. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Baptiste Joalland
- Department of Chemistry, Integrative Biosciences (Ibio) Wayne State University Karmanos Cancer Institute (KCI) 5101 Cass Ave Detroit MI 48202 USA
| | - Thomas Theis
- Department of Chemistry North Carolina State University Raleigh North Carolina 27695-8204 USA
| | - Stephan Appelt
- Institut für Technische und Makromolekulare Chemie (ITMC) RWTH Aachen University 52056 Aachen Germany
- Central Institute for Engineering Electronics and Analytics—Electronic Systems (ZEA 2) Forschungszentrum Jülich GmbH 52425 Jülich Germany
| | - Eduard Y. Chekmenev
- Department of Chemistry, Integrative Biosciences (Ibio) Wayne State University Karmanos Cancer Institute (KCI) 5101 Cass Ave Detroit MI 48202 USA
- Russian Academy of Sciences, Leninskiy Prospect 14, 119991 Moscow Russia
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30
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Joalland B, Theis T, Appelt S, Chekmenev EY. Background-Free Proton NMR Spectroscopy with Radiofrequency Amplification by Stimulated Emission Radiation. Angew Chem Int Ed Engl 2021; 60:26298-26302. [PMID: 34459080 PMCID: PMC8629966 DOI: 10.1002/anie.202108939] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Indexed: 01/13/2023]
Abstract
We report on the utility of Radiofrequency Amplification by Stimulated Emission Radiation (RASER) for background-free proton detection of hyperpolarized biomolecules. We performed hyperpolarization of ≈0.3 M ethyl acetate via pairwise parahydrogen addition to vinyl acetate. A proton NMR signal with signal-to-noise ratio exceeding 100 000 was detected without radio-frequency excitation at the clinically relevant magnetic field of 1.4 T using a standard (non-cryogenic) inductive detector with quality factor of Q=68. No proton background signal was observed from protonated solvent (methanol) or other added co-solvents such as ethanol, water or bovine serum. Moreover, we demonstrate RASER detection without radio-frequency excitation of a bolus of hyperpolarized contrast agent in biological fluid. Completely background-free proton detection of hyperpolarized contrast agents in biological media paves the way to new applications in the areas of high-resolution NMR spectroscopy and in vivo spectroscopy and imaging.
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Affiliation(s)
- Baptiste Joalland
- Department of Chemistry, Integrative Biosciences (Ibio), Wayne State University, Karmanos Cancer Institute (KCI), 5101 Cass Ave, Detroit, MI, 48202, USA
| | - Thomas Theis
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina, 27695-8204, USA
| | - Stephan Appelt
- Institut für Technische und Makromolekulare Chemie (ITMC), RWTH Aachen University, 52056, Aachen, Germany
- Central Institute for Engineering, Electronics and Analytics-Electronic Systems (ZEA 2), Forschungszentrum Jülich GmbH, 52425, Jülich, Germany
| | - Eduard Y Chekmenev
- Department of Chemistry, Integrative Biosciences (Ibio), Wayne State University, Karmanos Cancer Institute (KCI), 5101 Cass Ave, Detroit, MI, 48202, USA
- Russian Academy of Sciences, Leninskiy Prospect, 14, 119991, Moscow, Russia
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31
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Rayner PJ, Burns MJ, Fear EJ, Duckett SB. Steric and electronic effects on the 1 H hyperpolarisation of substituted pyridazines by signal amplification by reversible exchange. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2021; 59:1187-1198. [PMID: 33729592 PMCID: PMC8650576 DOI: 10.1002/mrc.5152] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 03/08/2021] [Accepted: 03/10/2021] [Indexed: 05/05/2023]
Abstract
Utility of the pyridazine motif is growing in popularity as pharmaceutical and agrochemical agents. The detection and structural characterisation of such materials is therefore imperative for the successful development of new products. Signal amplification by reversible exchange (SABRE) offers a route to dramatically improve the sensitivity of magnetic resonance methods, and we apply it here to the rapid and cost-effective hyperpolarisation of substituted pyridazines. The 33 substrates investigated cover a range of steric and electronic properties and their capacity to perform highly effective SABRE is assessed. We find the method to be tolerant to a broad range of electron donating and withdrawing groups; however, good sensitivity is evident when steric bulk is added to the 3- and 6-positions of the pyridazine ring. We optimise the method by reference to a disubstituted ester that yields signal gains of >9000-fold at 9.4 T (>28% spin polarisation).
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Affiliation(s)
- Peter J. Rayner
- Centre for Hyperpolarisation in Magnetic Resonance, Department of ChemistryUniversity of YorkYorkUK
| | - Michael J. Burns
- Centre for Hyperpolarisation in Magnetic Resonance, Department of ChemistryUniversity of YorkYorkUK
| | - Elizabeth J. Fear
- Centre for Hyperpolarisation in Magnetic Resonance, Department of ChemistryUniversity of YorkYorkUK
| | - Simon B. Duckett
- Centre for Hyperpolarisation in Magnetic Resonance, Department of ChemistryUniversity of YorkYorkUK
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32
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Korchak S, Kaltschnee L, Dervisoglu R, Andreas L, Griesinger C, Glöggler S. Spontaneous Enhancement of Magnetic Resonance Signals Using a RASER. Angew Chem Int Ed Engl 2021; 60:20984-20990. [PMID: 34289241 PMCID: PMC8518078 DOI: 10.1002/anie.202108306] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Indexed: 11/06/2022]
Abstract
Nuclear magnetic resonance is usually drastically limited by its intrinsically low sensitivity: Only a few spins contribute to the overall signal. To overcome this limitation, hyperpolarization methods were developed that increase signals several times beyond the normal/thermally polarized signals. The ideal case would be a universal approach that can signal enhance the complete sample of interest in solution to increase detection sensitivity. Here, we introduce a combination of para-hydrogen enhanced magnetic resonance with the phenomenon of the RASER: Large signals of para-hydrogen enhanced molecules interact with the magnetic resonance coil in a way that the signal is spontaneously converted into an in-phase signal. These molecules directly interact with other compounds via dipolar couplings and enhance their signal. We demonstrate that this is not only possible for solvent molecules but also for an amino acid.
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Affiliation(s)
- Sergey Korchak
- NMR Signal Enhancement GroupMax Planck Institute for Biophysical ChemistryAm Fassberg 1137077GöttingenGermany
- Center for Biostructural Imaging of Neurodegeneration of UMGVon-Siebold-Str. 3A37075GöttingenGermany
| | - Lukas Kaltschnee
- NMR Signal Enhancement GroupMax Planck Institute for Biophysical ChemistryAm Fassberg 1137077GöttingenGermany
- Center for Biostructural Imaging of Neurodegeneration of UMGVon-Siebold-Str. 3A37075GöttingenGermany
| | - Riza Dervisoglu
- Research Group for Solid State NMRMax Planck Institute for Biophysical ChemistryAm Fassberg 1137077GöttingenGermany
| | - Loren Andreas
- Research Group for Solid State NMRMax Planck Institute for Biophysical ChemistryAm Fassberg 1137077GöttingenGermany
| | - Christian Griesinger
- Department of NMR-based Structural BiologyMax Planck Institute for Biophysical ChemistryAm Fassberg 1137077GöttingenGermany
| | - Stefan Glöggler
- NMR Signal Enhancement GroupMax Planck Institute for Biophysical ChemistryAm Fassberg 1137077GöttingenGermany
- Center for Biostructural Imaging of Neurodegeneration of UMGVon-Siebold-Str. 3A37075GöttingenGermany
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33
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Korchak S, Kaltschnee L, Dervisoglu R, Andreas L, Griesinger C, Glöggler S. Spontaneous Enhancement of Magnetic Resonance Signals Using a RASER. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sergey Korchak
- NMR Signal Enhancement Group Max Planck Institute for Biophysical Chemistry Am Fassberg 11 37077 Göttingen Germany
- Center for Biostructural Imaging of Neurodegeneration of UMG Von-Siebold-Str. 3A 37075 Göttingen Germany
| | - Lukas Kaltschnee
- NMR Signal Enhancement Group Max Planck Institute for Biophysical Chemistry Am Fassberg 11 37077 Göttingen Germany
- Center for Biostructural Imaging of Neurodegeneration of UMG Von-Siebold-Str. 3A 37075 Göttingen Germany
| | - Riza Dervisoglu
- Research Group for Solid State NMR Max Planck Institute for Biophysical Chemistry Am Fassberg 11 37077 Göttingen Germany
| | - Loren Andreas
- Research Group for Solid State NMR Max Planck Institute for Biophysical Chemistry Am Fassberg 11 37077 Göttingen Germany
| | - Christian Griesinger
- Department of NMR-based Structural Biology Max Planck Institute for Biophysical Chemistry Am Fassberg 11 37077 Göttingen Germany
| | - Stefan Glöggler
- NMR Signal Enhancement Group Max Planck Institute for Biophysical Chemistry Am Fassberg 11 37077 Göttingen Germany
- Center for Biostructural Imaging of Neurodegeneration of UMG Von-Siebold-Str. 3A 37075 Göttingen Germany
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Tickner BJ, Zhivonitko VV, Telkki VV. Ultrafast Laplace NMR to study metal-ligand interactions in reversible polarisation transfer from parahydrogen. Phys Chem Chem Phys 2021; 23:16542-16550. [PMID: 34338685 PMCID: PMC8359933 DOI: 10.1039/d1cp02383g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 07/22/2021] [Indexed: 12/11/2022]
Abstract
Laplace Nuclear Magnetic Resonance (NMR) can determine relaxation parameters and diffusion constants, giving valuable information about molecular structure and dynamics. Information about relaxation times (T1 and T2) and the self-diffusion coefficient (D) can be extracted from exponentially decaying NMR signals by performing a Laplace transform, which is a different approach to traditional NMR involving Fourier transform of a free induction decay. Ultrafast Laplace NMR uses spatial encoding to collect the entire data set in just a single scan which provides orders of magnitude time savings. In this work we use ultrafast Laplace NMR D-T2 correlation sequences to measure key relaxation (T2) and diffusion (D) parameters of methanolic solutions containing pyridine. For the first time we combine this technique with the hyperpolarisation technique Signal Amplification By Reversible Exchange (SABRE), which employs an iridium catalyst to reversibly transfer polarisation from parahydrogen, to boost the 1H NMR signals of pyridine by up to 300-fold. We demonstrate use of ultrafast Laplace NMR to monitor changes in pyridine T2 and D associated with ligation to the iridium SABRE catalyst and kinetic isotope exchange reactions. The combined 1440-fold reduction in experiment time and 300-fold 1H NMR signal enhancement allow the determination of pyridine D coefficients and T2 values at 25 mM concentrations in just 3 seconds using SABRE hyperpolarised ultrafast Laplace NMR.
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Affiliation(s)
- Ben. J. Tickner
- NMR Research Unit, Faculty of Science, University of Oulu90014Finland
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35
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Kondo Y, Nonaka H, Takakusagi Y, Sando S. Entwicklung molekularer Sonden für die hyperpolarisierte NMR‐Bildgebung im biologischen Bereich. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.201915718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yohei Kondo
- Department of Chemistry and Biotechnology Graduate School of Engineering The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
| | - Hiroshi Nonaka
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University Kyoto University Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Yoichi Takakusagi
- Institute of Quantum Life Science National Institutes for Quantum and Radiological Science and Technology 4-9-1 Anagawa, Inage Chiba-city 263-8555 Japan
- National Institute of Radiological Sciences National Institutes for Quantum and Radiological Science and Technology 4-9-1 Anagawa, Inage Chiba-city 263-8555 Japan
| | - Shinsuke Sando
- Department of Chemistry and Biotechnology Graduate School of Engineering The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
- Department of Bioengineering Graduate School of Engineering The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
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36
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Chapman B, Joalland B, Meersman C, Ettedgui J, Swenson RE, Krishna MC, Nikolaou P, Kovtunov KV, Salnikov OG, Koptyug IV, Gemeinhardt ME, Goodson BM, Shchepin RV, Chekmenev EY. Low-Cost High-Pressure Clinical-Scale 50% Parahydrogen Generator Using Liquid Nitrogen at 77 K. Anal Chem 2021; 93:8476-8483. [PMID: 34102835 PMCID: PMC8262381 DOI: 10.1021/acs.analchem.1c00716] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We report on a robust and low-cost parahydrogen generator design employing liquid nitrogen as a coolant. The core of the generator consists of catalyst-filled spiral copper tubing, which can be pressurized to 35 atm. Parahydrogen fraction >48% was obtained at 77 K with three nearly identical generators using paramagnetic hydrated iron oxide catalysts. Parahydrogen quantification was performed on the fly via benchtop NMR spectroscopy to monitor the signal from residual orthohydrogen-parahydrogen is NMR silent. This real-time quantification approach was also used to evaluate catalyst activation at up to 1.0 standard liter per minute flow rate. The reported inexpensive device can be employed for a wide range of studies employing parahydrogen as a source of nuclear spin hyperpolarization. To this end, we demonstrate the utility of this parahydrogen generator for hyperpolarization of concentrated sodium [1-13C]pyruvate, a metabolic contrast agent under investigation in numerous clinical trials. The reported pilot optimization of SABRE-SHEATH (signal amplification by reversible exchange-shield enables alignment transfer to heteronuclei) hyperpolarization yielded 13C signal enhancement of over 14,000-fold at a clinically relevant magnetic field of 1 T corresponding to approximately 1.2% 13C polarization-if near 100% parahydrogen would have been employed, the reported value would be tripled to 13C polarization of 3.5%.
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Affiliation(s)
- Benjamin Chapman
- Department of Materials and Metallurgical Engineering, South Dakota School of Mines and Technology, 501 E St. Joseph Street Rapid City, South Dakota 57701, United States
| | - Baptiste Joalland
- Department of Chemistry, Integrative Biosciences (Ibio), Wayne State University, Karmanos Cancer Institute (KCI), 5101 Cass Ave, Detroit, Michigan 48202, United States
| | - Collier Meersman
- Department of Chemistry, Biology, and Health Sciences, South Dakota School of Mines and Technology, 501 E St. Joseph Street Rapid City, South Dakota 57701, United States
| | - Jessica Ettedgui
- Chemistry and Synthesis Center, National Heart, Lung, and Blood Institute, 9800 Medical Center Drive, Building B, Room #2034, Bethesda, Maryland 20850, United States
| | - Rolf E. Swenson
- Chemistry and Synthesis Center, National Heart, Lung, and Blood Institute, 9800 Medical Center Drive, Building B, Room #2034, Bethesda, Maryland 20850, United States
| | - Murali C. Krishna
- Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, 31 Center Drive Maryland 20814, United States
| | - Panayiotis Nikolaou
- XeUS Technologies LTD, Georgiou Karaiskaki 2A, Lakatamia 2312, Nicosia, Cyprus
| | - Kirill V. Kovtunov
- International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk 630090, Russia
- Novosibirsk State University, 2 Pirogova St., Novosibirsk 630090, Russia
| | - Oleg G. Salnikov
- International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk 630090, Russia
- Novosibirsk State University, 2 Pirogova St., Novosibirsk 630090, Russia
- Boreskov Institute of Catalysis SB RAS, 5 Acad. Lavrentiev Pr., Novosibirsk, 630090, Russia
| | - Igor V. Koptyug
- International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk 630090, Russia
| | - Max E. Gemeinhardt
- Department of Chemistry and Biochemistry, Southern Illinois University, 1245 Lincoln Drive, Carbondale, Illinois 62901, United States
| | - Boyd M. Goodson
- Department of Chemistry and Biochemistry, Southern Illinois University, 1245 Lincoln Drive, Carbondale, Illinois 62901, United States
- Materials Technology Center, Southern Illinois University, 1245 Lincoln Drive, Carbondale, Illinois 62901, United States
| | - Roman V. Shchepin
- Department of Chemistry, Biology, and Health Sciences, South Dakota School of Mines and Technology, 501 E St. Joseph Street Rapid City, South Dakota 57701, United States
| | - Eduard Y. Chekmenev
- Department of Chemistry, Integrative Biosciences (Ibio), Wayne State University, Karmanos Cancer Institute (KCI), 5101 Cass Ave, Detroit, Michigan 48202, United States
- Russian Academy of Sciences, Leninskiy Prospekt 14, Moscow, 119991, Russia
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37
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Sellies L, Aspers R, Tessari M. Determination of hydrogen exchange and relaxation parameters in PHIP complexes at micromolar concentrations. MAGNETIC RESONANCE (GOTTINGEN, GERMANY) 2021; 2:331-340. [PMID: 37904761 PMCID: PMC10539837 DOI: 10.5194/mr-2-331-2021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Accepted: 04/30/2021] [Indexed: 11/01/2023]
Abstract
Non-hydrogenative para-hydrogen-induced polarization (PHIP) is a fast, efficient and relatively inexpensive approach to enhance nuclear magnetic resonance (NMR) signals of small molecules in solution. The efficiency of this technique depends on the interplay of NMR relaxation and kinetic processes, which, at high concentrations, can be characterized by selective inversion experiments. However, in the case of dilute solutions this approach is clearly not viable. Here, we present alternative PHIP-based NMR experiments to determine hydrogen and hydride relaxation parameters as well as the rate constants for para-hydrogen association with and dissociation from asymmetric PHIP complexes at micromolar concentrations. Access to these parameters is necessary to understand and improve the PHIP enhancements of (dilute) substrates present in, for instance, biofluids and natural extracts.
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Affiliation(s)
- Lisanne Sellies
- Institute for Molecules and Materials, Radboud University, Nijmegen,
6525AJ, the Netherlands
| | - Ruud L. E. G. Aspers
- Institute for Molecules and Materials, Radboud University, Nijmegen,
6525AJ, the Netherlands
| | - Marco Tessari
- Institute for Molecules and Materials, Radboud University, Nijmegen,
6525AJ, the Netherlands
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38
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Chukanov NV, Salnikov OG, Trofimov IA, Kabir MSH, Kovtunov KV, Koptyug IV, Chekmenev EY. Synthesis and 15 N NMR Signal Amplification by Reversible Exchange of [ 15 N]Dalfampridine at Microtesla Magnetic Fields. Chemphyschem 2021; 22:960-967. [PMID: 33738893 DOI: 10.1002/cphc.202100109] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 03/18/2021] [Indexed: 01/10/2023]
Abstract
Signal Amplification by Reversible Exchange (SABRE) technique enables nuclear spin hyperpolarization of wide range of compounds using parahydrogen. Here we present the synthetic approach to prepare 15 N-labeled [15 N]dalfampridine (4-amino[15 N]pyridine) utilized as a drug to reduce the symptoms of multiple sclerosis. The synthesized compound was hyperpolarized using SABRE at microtesla magnetic fields (SABRE-SHEATH technique) with up to 2.0 % 15 N polarization. The 7-hour-long activation of SABRE pre-catalyst [Ir(IMes)(COD)Cl] in the presence of [15 N]dalfampridine can be remedied by the use of pyridine co-ligand for catalyst activation while retaining the 15 N polarization levels of [15 N]dalfampridine. The effects of experimental conditions such as polarization transfer magnetic field, temperature, concentration, parahydrogen flow rate and pressure on 15 N polarization levels of free and equatorial catalyst-bound [15 N]dalfampridine were investigated. Moreover, we studied 15 N polarization build-up and decay at magnetic field of less than 0.04 μT as well as 15 N polarization decay at the Earth's magnetic field and at 1.4 T.
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Affiliation(s)
- Nikita V Chukanov
- International Tomography Center SB RAS, 3A Institutskaya St., 630090, Novosibirsk, Russia.,Department of Natural Sciences, Novosibirsk State University, 2 Pirogova St., 630090, Novosibirsk, Russia
| | - Oleg G Salnikov
- International Tomography Center SB RAS, 3A Institutskaya St., 630090, Novosibirsk, Russia.,Department of Natural Sciences, Novosibirsk State University, 2 Pirogova St., 630090, Novosibirsk, Russia.,Boreskov Institute of Catalysis SB RAS, 5 Acad. Lavrentiev Pr., 630090, Novosibirsk, Russia
| | - Ivan A Trofimov
- International Tomography Center SB RAS, 3A Institutskaya St., 630090, Novosibirsk, Russia.,Department of Natural Sciences, Novosibirsk State University, 2 Pirogova St., 630090, Novosibirsk, Russia
| | - Mohammad S H Kabir
- Department of Chemistry, Integrative Biosciences (Ibio), Karmanos Cancer Institute (KCI), Wayne State University, Detroit, Michigan 48202, United States
| | - Kirill V Kovtunov
- International Tomography Center SB RAS, 3A Institutskaya St., 630090, Novosibirsk, Russia.,Department of Natural Sciences, Novosibirsk State University, 2 Pirogova St., 630090, Novosibirsk, Russia
| | - Igor V Koptyug
- International Tomography Center SB RAS, 3A Institutskaya St., 630090, Novosibirsk, Russia
| | - Eduard Y Chekmenev
- Department of Chemistry, Integrative Biosciences (Ibio), Karmanos Cancer Institute (KCI), Wayne State University, Detroit, Michigan 48202, United States.,Russian Academy of Sciences, 14 Leninskiy Prospekt, 119991, Moscow, Russia
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39
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Rayner PJ, Gillions JP, Hannibal VD, John RO, Duckett SB. Hyperpolarisation of weakly binding N-heterocycles using signal amplification by reversible exchange. Chem Sci 2021; 12:5910-5917. [PMID: 34168816 PMCID: PMC8179664 DOI: 10.1039/d0sc06907h] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 03/22/2021] [Indexed: 12/23/2022] Open
Abstract
Signal Amplification by Reversible Exchange (SABRE) is a catalytic method for improving the detection of molecules by magnetic resonance spectroscopy. It achieves this by simultaneously binding the target substrate (sub) and para-hydrogen to a metal centre. To date, sterically large substrates are relatively inaccessible to SABRE due to their weak binding leading to catalyst destabilisation. We overcome this problem here through a simple co-ligand strategy that allows the hyperpolarisation of a range of weakly binding and sterically encumbered N-heterocycles. The resulting 1H NMR signal size is increased by up to 1400 times relative to their more usual Boltzmann controlled levels at 400 MHz. Hence, a significant reduction in scan time is achieved. The SABRE catalyst in these systems takes the form [IrX(H)2(NHC)(sulfoxide)(sub)] where X = Cl, Br or I. These complexes are shown to undergo very rapid ligand exchange and lower temperatures dramatically improve the efficiency of these SABRE catalysts.
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Affiliation(s)
- Peter J Rayner
- Centre for Hyperpolarisation in Magnetic Resonance (CHyM), Department of Chemistry, University of York Heslington York YO10 5DD UK
| | - Joseph P Gillions
- Centre for Hyperpolarisation in Magnetic Resonance (CHyM), Department of Chemistry, University of York Heslington York YO10 5DD UK
| | - Valentin D Hannibal
- Centre for Hyperpolarisation in Magnetic Resonance (CHyM), Department of Chemistry, University of York Heslington York YO10 5DD UK
| | - Richard O John
- Centre for Hyperpolarisation in Magnetic Resonance (CHyM), Department of Chemistry, University of York Heslington York YO10 5DD UK
| | - Simon B Duckett
- Centre for Hyperpolarisation in Magnetic Resonance (CHyM), Department of Chemistry, University of York Heslington York YO10 5DD UK
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40
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Ellermann F, Pravdivtsev A, Hövener JB. Open-source, partially 3D-printed, high-pressure (50-bar) liquid-nitrogen-cooled parahydrogen generator. MAGNETIC RESONANCE (GOTTINGEN, GERMANY) 2021; 2:49-62. [PMID: 37904754 PMCID: PMC10539807 DOI: 10.5194/mr-2-49-2021] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Accepted: 12/15/2020] [Indexed: 11/01/2023]
Abstract
The signal of magnetic resonance imaging (MRI) can be enhanced by several orders of magnitude using hyperpolarization. In comparison to a broadly used dynamic nuclear polarization (DNP) technique that is already used in clinical trials, the parahydrogen (p H2 ) -based hyperpolarization approaches are less cost-intensive, are scalable, and offer high throughput. However, a p H2 generator is necessary. Available commercial p H2 generators are relatively expensive (EUR 10 000-150 000). To facilitate the spread of p H2 -based hyperpolarization studies, here we provide the blueprints and 3D models as open-source for a low-cost (EUR < 3000 ) 50-bar liquid-nitrogen-cooled p H2 generator.
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Affiliation(s)
- Frowin Ellermann
- Section for Biomedical Imaging, Molecular Imaging North Competence
Center (MOIN CC), Department of Radiology and Neuroradiology, University
Medical Center Schleswig-Holstein (UKSH), Kiel University, Kiel 24118, Germany
| | - Andrey Pravdivtsev
- Section for Biomedical Imaging, Molecular Imaging North Competence
Center (MOIN CC), Department of Radiology and Neuroradiology, University
Medical Center Schleswig-Holstein (UKSH), Kiel University, Kiel 24118, Germany
| | - Jan-Bernd Hövener
- Section for Biomedical Imaging, Molecular Imaging North Competence
Center (MOIN CC), Department of Radiology and Neuroradiology, University
Medical Center Schleswig-Holstein (UKSH), Kiel University, Kiel 24118, Germany
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41
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Kondo Y, Nonaka H, Takakusagi Y, Sando S. Design of Nuclear Magnetic Resonance Molecular Probes for Hyperpolarized Bioimaging. Angew Chem Int Ed Engl 2021; 60:14779-14799. [PMID: 32372551 DOI: 10.1002/anie.201915718] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Indexed: 12/13/2022]
Abstract
Nuclear hyperpolarization has emerged as a method to dramatically enhance the sensitivity of NMR spectroscopy. By application of this powerful tool, small molecules with stable isotopes have been used for highly sensitive biomedical molecular imaging. The recent development of molecular probes for hyperpolarized in vivo analysis has demonstrated the ability of this technique to provide unique metabolic and physiological information. This review presents a brief introduction of hyperpolarization technology, approaches to the rational design of molecular probes for hyperpolarized analysis, and examples of molecules that have met with success in vitro or in vivo.
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Affiliation(s)
- Yohei Kondo
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Hiroshi Nonaka
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto University Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Yoichi Takakusagi
- Institute of Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage, Chiba-city, 263-8555, Japan.,National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage, Chiba-city, 263-8555, Japan
| | - Shinsuke Sando
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.,Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
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42
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Reineri F, Cavallari E, Carrera C, Aime S. Hydrogenative-PHIP polarized metabolites for biological studies. MAGMA (NEW YORK, N.Y.) 2021; 34:25-47. [PMID: 33527252 PMCID: PMC7910253 DOI: 10.1007/s10334-020-00904-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 12/09/2020] [Accepted: 12/18/2020] [Indexed: 12/14/2022]
Abstract
ParaHydrogen induced polarization (PHIP) is an efficient and cost-effective hyperpolarization method, but its application to biological investigations has been hampered, so far, due to chemical challenges. PHIP is obtained by means of the addition of hydrogen, enriched in the para-spin isomer, to an unsaturated substrate. Both hydrogen atoms must be transferred to the same substrate, in a pairwise manner, by a suitable hydrogenation catalyst; therefore, a de-hydrogenated precursor of the target molecule is necessary. This has strongly limited the number of parahydrogen polarized substrates. The non-hydrogenative approach brilliantly circumvents this central issue, but has not been translated to in-vivo yet. Recent advancements in hydrogenative PHIP (h-PHIP) considerably widened the possibility to hyperpolarize metabolites and, in this review, we will focus on substrates that have been obtained by means of this method and used in vivo. Attention will also be paid to the requirements that must be met and on the issues that have still to be tackled to obtain further improvements and to push PHIP substrates in biological applications.
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Affiliation(s)
- Francesca Reineri
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Via Nizza 52, Turin, Italy.
| | - Eleonora Cavallari
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Via Nizza 52, Turin, Italy
| | - Carla Carrera
- Institute of Biostructures and Bioimaging, National Research Council, Via Nizza 52, Turin, Italy
| | - Silvio Aime
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Via Nizza 52, Turin, Italy
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43
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Tickner BJ, Borozdina Y, Duckett SB, Angelovski G. Exploring the hyperpolarisation of EGTA-based ligands using SABRE. Dalton Trans 2021; 50:2448-2461. [PMID: 33507194 DOI: 10.1039/d0dt03839c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The design of molecules whose magnetic resonance (MR) signals report on their biological environment is receiving attention as a route to non-invasive functional MR. Hyperpolarisation techniques improve the sensitivity of MR and enable real time low concentration MR imaging, allowing for the development of novel functional imaging methodologies. In this work, we report on the synthesis of a series of EGTA-derived molecules (EGTA - ethylene glycol-bis(2-aminoethylether)-N,N,N',N'-tetraacetic acid), whose core structures are known to bind biologically relevant metal ions in vivo, in addition to pyridyl rings that allow reversible ligation to an iridium dihydride complex. Consequently, they are amenable to hyperpolarisation through the parahydrogen-based signal amplification by reversible exchange (SABRE) process. We investigate how the proximity of EGTA and pyridine units, and the identity of the linker group, affect the SABRE hyperpolarisation attained for each agent. We also describe the effect of catalyst identity and co-ligand presence on these measurements and can achieve 1H NMR signal enhancements of up to 160-fold. We rationalise these results to suggest the design elements needed for probes amenable to SABRE hyperpolarisation whose MR signals might in the future report on the presence of metal ions.
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Affiliation(s)
- Ben J Tickner
- Centre for Hyperpolarisation in Magnetic Resonance (CHyM), Department of Chemistry, University of York, Heslington, York YO10 5NY, UK.
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44
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Tickner BJ, Ahwal F, Whitwood AC, Duckett SB. Reversible Hyperpolarization of Ketoisocaproate Using Sulfoxide-containing Polarization Transfer Catalysts. Chemphyschem 2021; 22:13-17. [PMID: 33196137 PMCID: PMC7839500 DOI: 10.1002/cphc.202000825] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/06/2020] [Indexed: 12/16/2022]
Abstract
The substrate scope of sulfoxide-containing magnetisation transfer catalysts is extended to hyperpolarize α-ketoisocaproate and α-ketoisocaproate-1-[13 C]. This is achieved by forming [Ir(H)2 (κ2 -ketoisocaproate)(N-heterocyclic carbene)(sulfoxide)] which transfers latent magnetism from p-H2 via the signal amplification by reversible exchange (SABRE) process. The effect of polarization transfer field on the formation of enhanced 13 C magnetization is evaluated. Consequently, performing SABRE in a 0.5 μT field enabled most efficient magnetisation transfer. 13 C NMR signals for α-ketoisocaproate-1-[13 C] in methanol-d4 are up to 985-fold more intense than their traditional Boltzmann derived signal intensity (0.8 % 13 C polarisation). Single crystal X-ray diffraction reveals the formation of the novel catalyst decomposition products [Ir(μ-H)(H)2 (IMes)(SO(Ph)(Me)2 )]2 and [(Ir(H)2 (IMes)(SO(Me)2 ))2 (μ-S)] when the sulfoxides methylphenylsulfoxide and dimethylsulfoxide are used respectively.
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Affiliation(s)
- Ben. J. Tickner
- Centre for Hyperpolarisation in Magnetic ResonanceUniversity of York, HeslingtonYorkU.K.YO10 5NY
- Department of ChemistryUniversity of York, HeslingtonYorkU.K.YO10 5DD
- NMR Research Unit, Faculty of ScienceUniversity of OuluP.O. Box 300090014OuluFinland
| | - Fadi Ahwal
- Centre for Hyperpolarisation in Magnetic ResonanceUniversity of York, HeslingtonYorkU.K.YO10 5NY
- Department of ChemistryUniversity of York, HeslingtonYorkU.K.YO10 5DD
| | | | - Simon B. Duckett
- Centre for Hyperpolarisation in Magnetic ResonanceUniversity of York, HeslingtonYorkU.K.YO10 5NY
- Department of ChemistryUniversity of York, HeslingtonYorkU.K.YO10 5DD
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45
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Tennant T, Hulme MC, Robertson TBR, Sutcliffe OB, Mewis RE. Benchtop NMR analysis of piperazine-based drugs hyperpolarised by SABRE. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2020; 58:1151-1159. [PMID: 31945193 DOI: 10.1002/mrc.4999] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 01/09/2020] [Accepted: 01/14/2020] [Indexed: 06/10/2023]
Abstract
Piperazine-based drugs, such as N-benzylpiperazine (BZP), became attractive in the 2000s due to possessing effects similar to amphetamines. Herein, BZP, in addition to its pyridyl analogues, 2-, 3-, and 4-pyridylmethylpiperidine (2-PMP, 3-PMP, and 4-PMP respectively) was subjected to the hyperpolarisation technique Signal Amplification By Reversible Exchange (SABRE) in order to demonstrate the use of this technique to detect these piperazine-based drugs. Although BZP was not hyperpolarised via SABRE, 2-PMP, 3-PMP, and 4-PMP were, with the ortho- and meta-pyridyl protons of 4-PMP showing the largest enhancement of 313-fold and 267-fold, respectively, in a 1.4-T detection field, following polarisation transfer at Earth's magnetic field. In addition to the freebase, 4-PMP.3HCl was also appraised by SABRE and was found not to polarise, however, the addition of increasing equivalents of triethylamine (TEA) produced the freebase, with a maximum enhancement observed upon the addition of 3 equivalents of TEA. Further addition of TEA led to a reduction in the observed enhancement. SABRE was also employed to polarise 4-PMP.3HCl (~20% w/w) in a simulated tablet to demonstrate the forensic application of the technique (138-fold enhancement for the ortho-pyridyl protons). The amount of 4-PMP.3HCl present in the simulated tablet was quantified via NMR using D2 O as a solvent and compared well to complimentary gas chromatography-mass spectrometry data. Exchanging D2 O for CD3 OD as the solvent utilised for analysis resulted in a significantly lower amount of 4-PMP.3HCl being determined, thus highlighting safeguarding issues linked to drug abuse in relation to determining the amount of active pharmaceutical ingredient present.
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Affiliation(s)
- Thomas Tennant
- Department of Natural Sciences, Manchester Metropolitan University, Manchester, UK
- MANchester DRug Analysis and Knowledge Exchange, Manchester Metropolitan University, Manchester, UK
| | - Matthew C Hulme
- Department of Natural Sciences, Manchester Metropolitan University, Manchester, UK
- MANchester DRug Analysis and Knowledge Exchange, Manchester Metropolitan University, Manchester, UK
| | - Thomas B R Robertson
- Department of Natural Sciences, Manchester Metropolitan University, Manchester, UK
| | - Oliver B Sutcliffe
- Department of Natural Sciences, Manchester Metropolitan University, Manchester, UK
- MANchester DRug Analysis and Knowledge Exchange, Manchester Metropolitan University, Manchester, UK
| | - Ryan E Mewis
- Department of Natural Sciences, Manchester Metropolitan University, Manchester, UK
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Mandal R, Pham P, Hilty C. Nuclear Spin Hyperpolarization of NH 2 - and CH 3 -Substituted Pyridine and Pyrimidine Moieties by SABRE. Chemphyschem 2020; 21:2166-2172. [PMID: 32783276 DOI: 10.1002/cphc.202000483] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/23/2020] [Indexed: 01/06/2023]
Abstract
Hyperpolarization of N-heterocycles with signal amplification by reversible exchange (SABRE) induces NMR sensitivity gains for biological molecules. Substitutions with functional groups, in particular in the ortho-position of the heterocycle, however, result in low polarization using a typical Ir catalyst with a bis-mesityl N-heterocyclic carbene ligand for SABRE, presumably due to steric hindrance. With the addition of allylamine or acetonitrile as coligands to the precatalyst chloro(1,5-cyclooctadiene)[4,5-dimethyl-1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene] iridium, the 1 H signal enhancement increased in several substrates with ortho NH2 substitutions. For example, for a proton in 2,4-diaminopyrimidine, the enhancement factors increased from -7±1 to -210±20 with allylamine or to -160±10 with acetonitrile. CH3 substituted molecules yielded maximum signal enhancements of -25±7 with acetonitrile addition, which is considerably less than the corresponding NH2 substituted molecules, despite exhibiting similar steric size. With the more electron-donating NH2 substitution resulting in greater enhancement, it is concluded that steric hindrance is not the only dominant factor in determining the polarizability of the CH3 substituted compounds. The addition of allylamine increased the signal enhancement for the 290 Da trimethoprim, a molecule with a 2,4-diaminopyrimidine moiety serving as an antibacterial agent, to -70.
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Affiliation(s)
- Ratnamala Mandal
- Department of Chemistry, Texas A&M University, College Station, TX, 77843-3255, USA
| | - Pierce Pham
- Department of Chemistry, Texas A&M University, College Station, TX, 77843-3255, USA
| | - Christian Hilty
- Department of Chemistry, Texas A&M University, College Station, TX, 77843-3255, USA
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Colell JFP, Logan AWJ, Zhou Z, Lindale JR, Laasner R, Shchepin RV, Chekmenev EY, Blum V, Warren WS, Malcolmson SJ, Theis T. Rational ligand choice extends the SABRE substrate scope. Chem Commun (Camb) 2020; 56:9336-9339. [PMID: 32671356 PMCID: PMC7443256 DOI: 10.1039/d0cc01330g] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Here we report on chelating ligands for Signal Amplification By Reversible Exchange (SABRE) catalysts that permit hyperpolarisation on otherwise sterically hindered substrates. We demonstrate 1H enhancements of ∼100-fold over 8.5 T thermal for 2-substituted pyridines, and smaller, yet significant enhancements for provitamin B6 and caffeine. We also show 15N-enhancements of ∼1000-fold and 19F-enhancements of 30-fold.
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Affiliation(s)
| | | | - Zijian Zhou
- Department of Chemistry, Duke University, Durham, NC 27708, USA
| | | | - Raul Laasner
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Roman V. Shchepin
- Department of Chemistry, Biology, and Health Sciences, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, USA
| | - Eduard Y. Chekmenev
- Russian Academy of Sciences, Leninskiy Prospekt 14, 119991 Moscow, Russia
- Department of Chemistry, Integrative Biosciences (IBio), Karmanos Cancer Institute (KCI), Wayne State University, Detroit, MI 48202, USA
| | - Volker Blum
- Department of Chemistry, Duke University, Durham, NC 27708, USA
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Warren S. Warren
- Department of Chemistry, Duke University, Durham, NC 27708, USA
- Departments of Physics, Radiology and Biomedical Engineering, Duke University, Durham, NC 27707, USA
| | | | - Thomas Theis
- Department of Chemistry, Duke University, Durham, NC 27708, USA
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695
- Joint Department of Biomedical Engineering University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, NC, USA
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Chae H, Min S, Jeong HJ, Namgoong SK, Oh S, Kim K, Jeong K. Organic Reaction Monitoring of a Glycine Derivative Using Signal Amplification by Reversible Exchange-Hyperpolarized Benchtop Nuclear Magnetic Resonance Spectroscopy. Anal Chem 2020; 92:10902-10907. [DOI: 10.1021/acs.analchem.0c01270] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Heelim Chae
- Department of Chemistry, Seoul Women’s University, Seoul 01797, South Korea
| | - Sein Min
- Department of Chemistry, Seoul Women’s University, Seoul 01797, South Korea
| | - Hye Jin Jeong
- Department of Chemistry, Korea Military Academy, Seoul 01805, South Korea
| | - Sung Keon Namgoong
- Department of Chemistry, Seoul Women’s University, Seoul 01797, South Korea
| | - Sangwon Oh
- Korea Research Institute of Standards and Science, Daejeon 34113, South Korea
| | - Kiwoong Kim
- Korea Research Institute of Standards and Science, Daejeon 34113, South Korea
- Deparment of Medical Physics, University of Science and Technology, Daejeon 34113, South Korea
| | - Keunhong Jeong
- Department of Chemistry, Korea Military Academy, Seoul 01805, South Korea
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Tickner BJ, Rayner PJ, Duckett SB. Using SABRE Hyperpolarized 13C NMR Spectroscopy to Interrogate Organic Transformations of Pyruvate. Anal Chem 2020; 92:9095-9103. [DOI: 10.1021/acs.analchem.0c01334] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ben. J. Tickner
- Center for Hyperpolarization in Magnetic Resonance (CHyM), Department of Chemistry, University of York, Heslington, York YO10 5NY, United Kingdom
| | - Peter J. Rayner
- Center for Hyperpolarization in Magnetic Resonance (CHyM), Department of Chemistry, University of York, Heslington, York YO10 5NY, United Kingdom
| | - Simon B. Duckett
- Center for Hyperpolarization in Magnetic Resonance (CHyM), Department of Chemistry, University of York, Heslington, York YO10 5NY, United Kingdom
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50
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Fekete M, Ahwal F, Duckett SB. Remarkable Levels of 15N Polarization Delivered through SABRE into Unlabeled Pyridine, Pyrazine, or Metronidazole Enable Single Scan NMR Quantification at the mM Level. J Phys Chem B 2020; 124:4573-4580. [PMID: 32383603 PMCID: PMC7277555 DOI: 10.1021/acs.jpcb.0c02583] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
While many drugs and metabolites contain nitrogen, harnessing their diagnostic 15N NMR signature for their characterization is underutilized because of inherent detection difficulties. Here, we demonstrate how precise ultralow field signal amplification by reversible exchange (±0.2 mG) in conjunction parahydrogen and an iridium precatalyst of the form IrCl(COD)(NHC) with the coligand d9-benzylamine allows the naturally abundant 15N NMR signatures of pyridine, pyrazine, metronidazole, and acetonitrile to be readily detected at 9.4 T in single NMR observations through >50% 15N polarization levels. These signals allow for rapid and precise reagent quantification via a response that varies linearly over the 2-70 mM concentration range.
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Affiliation(s)
- Marianna Fekete
- Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Fadi Ahwal
- Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Simon B Duckett
- Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
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