1
|
Picazo-Frutos R, Sheberstov KF, Blanchard JW, Van Dyke E, Reh M, Sjoelander T, Pines A, Budker D, Barskiy DA. Zero-field J-spectroscopy of quadrupolar nuclei. Nat Commun 2024; 15:4487. [PMID: 38802356 DOI: 10.1038/s41467-024-48390-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 04/30/2024] [Indexed: 05/29/2024] Open
Abstract
Zero- to ultralow-field nuclear magnetic resonance (ZULF NMR) allows molecular structure elucidation via measurement of electron-mediated spin-spin J-couplings. This study examines zero-field J-spectra from molecules with quadrupolar nuclei, exemplified by solutions of various isotopologues of ammonium cations. The spectra reveal differences between various isotopologues upon extracting precise J-coupling values from pulse-acquire measurements. A primary isotope effect, △ J = γ 14 N / γ 15 N J 15 N H - J 14 N H ≈ - 58 mHz, is deduced by analysis of the proton-nitrogen J-coupling ratios. This study points toward further experiments with symmetric cations containing quadrupolar nuclei, promising applications in biomedicine, energy storage, and benchmarking quantum chemistry calculations.
Collapse
Affiliation(s)
- Román Picazo-Frutos
- Helmholtz-Institut Mainz, 55099, Mainz, Germany
- Institute of Physics, Johannes Gutenberg-Universität Mainz, 55128, Mainz, Germany
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - Kirill F Sheberstov
- Helmholtz-Institut Mainz, 55099, Mainz, Germany
- Institute of Physics, Johannes Gutenberg-Universität Mainz, 55128, Mainz, Germany
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
- Department of Chemistry, École Normale Supérieure, PSL University, Paris, France
| | - John W Blanchard
- Helmholtz-Institut Mainz, 55099, Mainz, Germany
- Institute of Physics, Johannes Gutenberg-Universität Mainz, 55128, Mainz, Germany
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
- Quantum Technology Center, University of Maryland, College Park, MD, USA
| | - Erik Van Dyke
- Helmholtz-Institut Mainz, 55099, Mainz, Germany
- Institute of Physics, Johannes Gutenberg-Universität Mainz, 55128, Mainz, Germany
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
| | - Moritz Reh
- Department of Physics, University of California-Berkeley, Berkeley, CA, 94720, USA
- Kirchhoff-Institut für Physik, Universität Heidelberg, Im Neuenheimer Feld 227, 69120, Heidelberg, Germany
| | - Tobias Sjoelander
- Department of Physics, University of Basel, Klingelbergstrasse 82, Basel, CH-4056, Switzerland
- Department of Chemistry, University of California, Berkeley, CA, 94720-3220, USA
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720-3220, USA
| | - Alexander Pines
- Department of Chemistry, University of California, Berkeley, CA, 94720-3220, USA
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720-3220, USA
| | - Dmitry Budker
- Helmholtz-Institut Mainz, 55099, Mainz, Germany
- Institute of Physics, Johannes Gutenberg-Universität Mainz, 55128, Mainz, Germany
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
- Department of Physics, University of California-Berkeley, Berkeley, CA, 94720, USA
| | - Danila A Barskiy
- Helmholtz-Institut Mainz, 55099, Mainz, Germany.
- Institute of Physics, Johannes Gutenberg-Universität Mainz, 55128, Mainz, Germany.
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany.
- Department of Chemistry, University of California, Berkeley, CA, 94720-3220, USA.
| |
Collapse
|
2
|
Sivelli G, Conley GM, Herrera C, Marable K, Rodriguez KJ, Bollwein H, Sudano MJ, Brugger J, Simpson AJ, Boero G, Grisi M. NMR spectroscopy of a single mammalian early stage embryo. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2022; 335:107142. [PMID: 34999310 DOI: 10.1016/j.jmr.2021.107142] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 12/22/2021] [Accepted: 12/26/2021] [Indexed: 06/14/2023]
Abstract
The resolving power, chemical sensitivity and non-invasive nature of NMR have made it an established technique for in vivo studies of large organisms both for research and clinical applications. NMR would clearly be beneficial for analysis of entities at the microscopic scale of about 1 nL (the nanoliter scale), typical of early development of mammalian embryos, microtissues and organoids: the scale where the building blocks of complex organisms could be observed. However, the handling of such small samples (about 100 µm) and sensitivity issues have prevented a widespread adoption of NMR. In this article we show how these limitations can be overcome to obtain NMR spectra of a mammalian embryo in its early stage. To achieve this we employ ultra-compact micro-chip technologies in combination with 3D-printed micro-structures. Such device is packaged for use as plug & play sensor and it shows sufficient sensitivity to resolve NMR signals from individual bovine pre-implantation embryos. The embryos in this study are obtained through In Vitro Fertilization (IVF) techniques, transported cryopreserved to the NMR laboratory, and measured shortly after thawing. In less than 1 h these spherical samples of just 130-190 µm produce distinct spectral peaks, largely originating from lipids contained inside them. We further observe how the spectra vary from one sample to another despite their optical and morphological similarities, suggesting that the method can further develop into a non-invasive embryo assay for selection prior to embryo transfer.
Collapse
Affiliation(s)
| | | | - Carolina Herrera
- Clinic of Reproductive Medicine, Department for Farm Animals, University of Zurich, 8057 Zurich, Switzerland
| | | | - Kyle J Rodriguez
- Microsystems Laboratory, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Heinrich Bollwein
- Clinic of Reproductive Medicine, Department for Farm Animals, University of Zurich, 8057 Zurich, Switzerland
| | - Mateus J Sudano
- Department of Genetics and Evolution, Federal University of São Carlos, São Carlos, SP, Brazil
| | - Jürgen Brugger
- Microsystems Laboratory, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Andre J Simpson
- Environmental NMR Center, University of Toronto, Scarborough Campus, 1265 Military Trail, Toronto M1C1A5, Canada
| | - Giovanni Boero
- Environmental NMR Center, University of Toronto, Scarborough Campus, 1265 Military Trail, Toronto M1C1A5, Canada
| | - Marco Grisi
- Annaida Technologies SA, Lausanne, Switzerland.
| |
Collapse
|
3
|
Grisi M, Conley GM, Rodriguez KJ, Riva E, Egli L, Moritz W, Lichtenberg J, Brugger J, Boero G. NMR microsystem for label-free characterization of 3D nanoliter microtissues. Sci Rep 2020; 10:18306. [PMID: 33110145 PMCID: PMC7758329 DOI: 10.1038/s41598-020-75480-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 10/13/2020] [Indexed: 02/06/2023] Open
Abstract
Performing chemical analysis at the nanoliter (nL) scale is of paramount importance for medicine, drug development, toxicology, and research. Despite the numerous methodologies available, a tool for obtaining chemical information non-invasively is still missing at this scale. Observer effects, sample destruction and complex preparatory procedures remain a necessary compromise. Among non-invasive spectroscopic techniques, one able to provide holistic and highly resolved chemical information in-vivo is nuclear magnetic resonance (NMR). For its renowned informative power and ability to foster discoveries and life-saving applications, efficient NMR at microscopic scales is highly sought after, but so far technical limitations could not match the stringent necessities of microbiology, such as biocompatible handling, ease of use, and high throughput. Here we introduce a novel microsystem, which combines CMOS technology with 3D microfabrication, enabling nL NMR as a platform tool for non-invasive spectroscopy of organoids, 3D cell cultures, and early stage embryos. In this study we show its application to microlivers models simulating non-alcoholic fatty liver disease, demonstrating detection of lipid metabolism dynamics in a time frame of 14 days based on 117 measurements of single 3D human liver microtissues.
Collapse
Affiliation(s)
- Marco Grisi
- Annaida Technologies SA, Lausanne, Switzerland.
| | | | - Kyle J Rodriguez
- Microsystems Laboratory, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Erika Riva
- Service de Gastro-Entérologie et D'hépatologie, CHUV, Epalinges, Switzerland
| | | | | | | | - Jürgen Brugger
- Microsystems Laboratory, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Giovanni Boero
- Microsystems Laboratory, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| |
Collapse
|
4
|
Sun P, Wang Q, Yuan B, Zhu Q, Jiang B, Li C, Lan W, Cao C, Zhang X, Liu M. Monitoring alkaline transitions of yeast iso-1 cytochrome c at natural isotopic abundance using trimethyllysine as a native NMR probe. Chem Commun (Camb) 2018; 54:12630-12633. [PMID: 30351312 DOI: 10.1039/c8cc07605g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Spectral overlap makes it difficult to use NMR for mapping the conformational profile of heterogeneous conformational ensembles of macromolecules. Here, we apply a 1H-14N HSQC experiment to monitor the alkaline conformational transitions of yeast iso-1 cytochrome c (ycyt c) at natural isotopic abundance. Trimethylated Lys72 of ycyt c is selectively detected by a 1H-14N HSQC experiment, and used as a probe to trace conformational transitions of ycyt c under alkaline conditions. It was found that at least four different conformers of ycyt c coexisted under alkaline conditions. Besides the native structure, Lys73 or Lys79 coordinated conformers and a partially unfolded state with exposed heme were observed. These results indicate that the method is powerful at simplifying spectra of a trimethylated protein, which makes it possible to study complex conformational transitions of naturally extracted or chemically modified trimethylated protein at natural isotopic abundance.
Collapse
Affiliation(s)
- Peng Sun
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan National Center for Magnetic Resonance, CAS Key Laboratory of Magnetic Resonance in Biological Systems, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, 430071, China.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Mao XA, Jiang B, Jiang L, Liu M. (1)H- (31)P soft-HSQC pulse sequence specifically for detecting phosphomono- and diesters in biological samples. Mol Imaging Biol 2012; 15:245-9. [PMID: 23229351 DOI: 10.1007/s11307-012-0607-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
PURPOSE Phosphomono- and diesters (PME and PDE) are important metabolites that are potential biomarkers for a number of cancers. We designed a new NMR pulse sequence, i.e., (1)H-(31)P soft-heteronuclear single quantum correlation (HSQC), specifically for noninvasively detecting PME and PDE in biological samples. PROCEDURE The nonselective (1)H refocusing π pulses in the conventional heteronuclear single quantum correlation pulse sequence are replaced by selective π pulses. When the selective pulses are offset on the CH2O resonances, the homonuclear couplings between the NCH2 and CH2O protons are effectively removed, and the spectrum of PME and PDE is significantly enhanced. RESULTS The sensitivity of this pulse sequence has been demonstrated with milk and mouse brain samples. A soft-HSQC spectrum, where only PME and PDE signals appear, can be recorded from these biological samples in minutes with remarkably high signal-to-noise ratio. CONCLUSION This pulse sequence provides a new and quick method for in vivo studies of phosphorus metabolite in the human brain and other tissues for medical purposes.
Collapse
Affiliation(s)
- Xi-an Mao
- Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.
| | | | | | | |
Collapse
|