1
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Tacail T, Lewis J, Clauss M, Coath CD, Evershed R, Albalat E, Elliott TR, Tütken T. Diet, cellular, and systemic homeostasis control the cycling of potassium stable isotopes in endothermic vertebrates. Metallomics 2023; 15:mfad065. [PMID: 37858308 DOI: 10.1093/mtomcs/mfad065] [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: 12/13/2022] [Accepted: 10/18/2023] [Indexed: 10/21/2023]
Abstract
The naturally occurring stable isotopes of potassium (41K/39K, expressed as δ41K) have the potential to make significant contributions to vertebrate and human biology. The utility of K stable isotopes is, however, conditioned by the understanding of the dietary and biological factors controlling natural variability of δ41K. This paper reports a systematic study of K isotopes in extant terrestrial endothermic vertebrates. δ41K has been measured in 158 samples of tissues, biofluids, and excreta from 40 individuals of four vertebrate species (rat, guinea pig, pig and quail) reared in two controlled feeding experiments. We show that biological processing of K by endothermic vertebrates produces remarkable intra-organism δ41K variations of ca. 1.6‰. Dietary δ41K is the primary control of interindividual variability and δ41K of bodily K is +0.5-0.6‰ higher than diet. Such a trophic isotope effect is expected to propagate throughout trophic chains, opening promising use for reconstructing dietary behaviors in vertebrate ecosystems. In individuals, cellular δ41K is related to the intensity of K cycling and effectors of K homeostasis, including plasma membrane permeability and electrical potential. Renal and intestinal transepithelial transports also control fractionation of K isotopes. Using a box-modeling approach, we establish a first model of K isotope homeostasis. We predict a strong sensitivity of δ41K to variations of intracellular and renal K cycling in normal and pathological contexts. Thus, K isotopes constitute a promising tool for the study of K dyshomeostasis.
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Affiliation(s)
- T Tacail
- Institute of Geosciences, Johannes Gutenberg University, J.-J.-Becher-Weg 21, D-55128, Mainz, Germany
- School of Earth Sciences, University of Bristol, Bristol, UK
| | - J Lewis
- School of Earth Sciences, University of Bristol, Bristol, UK
| | - M Clauss
- Clinic for Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty, University of Zurich, Switzerland
| | - C D Coath
- School of Earth Sciences, University of Bristol, Bristol, UK
| | - R Evershed
- Organic Geochemistry Unit, School of Chemistry, University of Bristol, UK
| | - E Albalat
- ENS de LYON, Universite Claude Bernard Lyon1, LGL-TPE, CNRS UMR 5276, Lyon, France
| | - T R Elliott
- School of Earth Sciences, University of Bristol, Bristol, UK
| | - T Tütken
- Institute of Geosciences, Johannes Gutenberg University, J.-J.-Becher-Weg 21, D-55128, Mainz, Germany
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2
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Cui MM, Moynier F, Su BX, Dai W, Mahan B, Le Borgne M. Distinctive calcium isotopic composition of mice organs and fluids: implications for biological research. Anal Bioanal Chem 2023; 415:6839-6850. [PMID: 37755490 DOI: 10.1007/s00216-023-04962-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 09/07/2023] [Accepted: 09/12/2023] [Indexed: 09/28/2023]
Abstract
The stable calcium (Ca) isotopes offer a minimally invasive method for assessing Ca balance in the body, providing a new avenue for research and clinical applications. In this study, we measured the Ca isotopic composition of soft tissues (brain, muscle, liver, and kidney), mineralized tissue (bone), and blood (plasma) from 10 mice (5 females and 5 males) with three different genetic backgrounds and same age (3 months old). The results reveal a distinctive Ca isotopic composition in different body compartments of mice, primally controlled by each compartment's unique Ca metabolism and genetic background, independent of sex. The bones are enriched in the lighter Ca isotopes (δ44/40Cabone = - 0.10 ± 0.55 ‰) compared to blood and other soft tissues, reflecting the preferential incorporation of lighter Ca isotopes through bone formation, while heavier Ca isotopes remain preferentially in blood. The brain and muscle are enriched in lighter Ca isotopes (δ44/40Cabrain = - 0.10 ± 0.53 ‰; δ44/40Camuscle = 0.19 ± 0.41 ‰) relative to blood and other soft tissues, making the brain the isotopically lightest soft tissues of the mouse body. In contrast, the kidney is enriched in heavier isotopes (δ44/40Cakidney = 0.86 ± 0.31 ‰) reflecting filtration and reabsorption by the kidney. This study provides important insight into the Ca isotopic composition of various body compartments and fluids.
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Affiliation(s)
- Meng-Meng Cui
- Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China.
- Institut de Physique du Globe de Paris, Université Paris Cité, CNRS, 1 Rue Jussieu, 75005, Paris, France.
| | - Frédéric Moynier
- Institut de Physique du Globe de Paris, Université Paris Cité, CNRS, 1 Rue Jussieu, 75005, Paris, France.
| | - Ben-Xun Su
- Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wei Dai
- Institut de Physique du Globe de Paris, Université Paris Cité, CNRS, 1 Rue Jussieu, 75005, Paris, France
| | - Brandon Mahan
- Earth and Environmental Sciences, James Cook University, Townsville, Australia
| | - Marie Le Borgne
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, 75018, Paris, LVTS, France
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3
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Qu R, Han G, Tian Y, Zhao Y. Calcium isotope ratio in kidney stones: preliminary exploration of mechanism from the geochemical perspective. METALLOMICS : INTEGRATED BIOMETAL SCIENCE 2022; 14:6874760. [PMID: 36472544 DOI: 10.1093/mtomcs/mfac095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Accepted: 11/24/2022] [Indexed: 12/12/2022]
Abstract
Stable calcium (Ca) isotope ratios are sensitive and radiation-free biomarkers in monitoring biological processes in human bodies. Recently, the Ca isotope ratios of bone, blood, and urine have been widely reported to study bone mineral balance. However, as a pure Ca crystallization product, there is no report on the Ca isotope ratios of kidney stones, even though the prevalence of kidney stones is currently on the rise. Here, we measured Ca isotope data of 21 kidney stone samples collected in Beijing, China. The δ44/42CaNIST 915a values ranged from 0.25‰ to 2.85‰ for calcium oxalate, and from 0.38‰ to 3.00‰ and 0.61‰ to 0.69‰ for carbonate apatite and uric acid, respectively. Kidney stones have heavier Ca isotope ratios than bone or blood, which is probably because complexed Ca contains more heavy Ca isotopes than free Ca2+. Ca isotope evidence suggests that magnesium (Mg) affects kidney stone formation, as the δ44/42CaNIST 915a value is inversely correlated with the Ca/Mg ratio. This study provides important preliminary reference values on the Ca isotopic composition of kidney stones and proposes a factor influencing Ca isotope fractionation in biological processes for future research.
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Affiliation(s)
- Rui Qu
- Institute of Earth Sciences, China University of Geosciences (Beijing), Beijing 100083, China
| | - Guilin Han
- Institute of Earth Sciences, China University of Geosciences (Beijing), Beijing 100083, China
| | - Yu Tian
- Department of Urology, Peking University Third Hospital, Beijing100191, China
| | - Ye Zhao
- Nu Instruments, Wrexham Industrial Estate, 74 Clywedog Road South, Wresham LL13 9XS, UK
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4
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Gharibi H, Chernobrovkin AL, Saei AA, Zhang X, Gaetani M, Makarov AA, Zubarev RA. Proteomics-Compatible Fourier Transform Isotopic Ratio Mass Spectrometry of Polypeptides. Anal Chem 2022; 94:15048-15056. [PMID: 36251694 PMCID: PMC9631351 DOI: 10.1021/acs.analchem.2c03119] [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] [Indexed: 11/29/2022]
Abstract
![]()
Measuring the relative
abundances of heavy stable isotopes
of the
elements C, H, N, and O in proteins is of interest in environmental
science, archeology, zoology, medicine, and other fields. The isotopic
abundance measurements of the fine structure of immonium ions with
ultrahigh resolution mass spectrometry obtained in gas-phase fragmentation
of polypeptides have previously uncovered anomalous deuterium enrichment
in (hydroxy)proline of bone collagen in marine mammals. Here, we provide
a detailed description and validation of this approach and demonstrate
per mil-range precision of isotopic ratio measurements in aliphatic
residues from proteins and cell lysates. The analysis consists of
proteomics-type experiment demanding sub-microgram amounts of a protein
sample and providing concomitantly protein sequence data allowing
one to verify sample purity and establish its identity. A novel software
tool protein amino acid-resolved isotopic ratio mass spectrometry
(PAIR-MS) is presented for extracting isotopic ratio data from the
raw data files acquired on an Orbitrap mass spectrometer.
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Affiliation(s)
- Hassan Gharibi
- Division of Physiological Chemistry I, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm171 77, Sweden
| | | | - Amir Ata Saei
- Division of Physiological Chemistry I, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm171 77, Sweden.,Department of Cell Biology, Harvard Medical School, Boston, Massachusetts02115, United States
| | - Xuepei Zhang
- Division of Physiological Chemistry I, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm171 77, Sweden.,Chemical Proteomics, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm171 77, Sweden.,Unit of Chemical Proteomics, Science for Life Laboratory (SciLifeLab), Stockholm171 77, Sweden
| | - Massimiliano Gaetani
- Division of Physiological Chemistry I, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm171 77, Sweden.,Chemical Proteomics, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm171 77, Sweden.,Unit of Chemical Proteomics, Science for Life Laboratory (SciLifeLab), Stockholm171 77, Sweden
| | | | - Roman A Zubarev
- Division of Physiological Chemistry I, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm171 77, Sweden.,Department of Pharmacological & Technological Chemistry, I.M. Sechenov First Moscow State Medical University, Moscow119146, Russia.,The National Medical Research Center for Endocrinology, 115478Moscow, Russia
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5
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Mahan B, Antonelli MA, Burckel P, Turner S, Chung R, Habekost M, Jørgensen AL, Moynier F. Longitudinal biometal accumulation and Ca isotope composition of the Göttingen minipig brain. Metallomics 2020; 12:1585-1598. [PMID: 33084720 DOI: 10.1039/d0mt00134a] [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
Biometals play a critical role in both the healthy and diseased brain's functioning. They accumulate in the normal aging brain, and are inherent to neurodegenerative disorders and their associated pathologies. A prominent example of this is the brain accumulation of metals such as Ca, Fe and Cu (and more ambiguously, Zn) associated with Alzheimer's disease (AD). The natural stable isotope compositions of such metals have also shown utility in constraining biological mechanisms, and in differentiating between healthy and diseased states, sometimes prior to conventional methods. Here we have detailed the distribution of the biologically relevant elements Mg, P, K, Ca, Fe, Cu and Zn in brain regions of Göttingen minipigs ranging in age from three months to nearly six years, including control animals and both a single- and double-transgenic model of AD (PS1, APP/PS1). Moreover, we have characterized the Ca isotope composition of the brain for the first time. Concentration data track rises in brain biometals with age, namely for Fe and Cu, as observed in the normal ageing brain and in AD, and biometal data point to increased soluble amyloid beta (Aβ) load prior to AD plaque identification via brain imaging. Calcium isotope results define the brain as the isotopically lightest permanent reservoir in the body, indicating that brain Ca dyshomeostasis may induce measurable isotopic disturbances in accessible downstream reservoirs such as biofluids.
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Affiliation(s)
- Brandon Mahan
- Earth and Environmental Science, James Cook University, Townsville, Queensland 4811, Australia. and Thermo Fisher Isotope Development Hub, Department of Earth and Planetary Sciences, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Michael A Antonelli
- Université de Paris, Institut de Physique du Globe de Paris, CNRS, 75238 Paris, France and Institute of Geochemistry and Petrology, Department of Earth Sciences, ETH Zürich, 8092 Zürich, Switzerland
| | - Pierre Burckel
- Université de Paris, Institut de Physique du Globe de Paris, CNRS, 75238 Paris, France
| | - Simon Turner
- Thermo Fisher Isotope Development Hub, Department of Earth and Planetary Sciences, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Roger Chung
- Thermo Fisher Isotope Development Hub, Department of Earth and Planetary Sciences, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Mette Habekost
- Department of Biomedicine, Aarhus University, 8000 Aarhus C, Denmark
| | | | - Frédéric Moynier
- Université de Paris, Institut de Physique du Globe de Paris, CNRS, 75238 Paris, France
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6
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Mahan B, Chung RS, Pountney DL, Moynier F, Turner S. Isotope metallomics approaches for medical research. Cell Mol Life Sci 2020; 77:3293-3309. [PMID: 32130428 PMCID: PMC11104924 DOI: 10.1007/s00018-020-03484-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 01/20/2020] [Accepted: 02/17/2020] [Indexed: 12/16/2022]
Abstract
Metallomics is a rapidly evolving field of bio-metal research that integrates techniques and perspectives from other "-omics" sciences (e.g. genomics, proteomics) and from research vocations further afield. Perhaps the most esoteric of this latter category has been the recent coupling of biomedicine with element and isotope geochemistry, commonly referred to as isotope metallomics. Over the course of less than two decades, isotope metallomics has produced numerous benchmark studies highlighting the use of stable metal isotope distribution in developing disease diagnostics-e.g. cancer, neurodegeneration, osteoporosis-as well as their utility in deciphering the underlying mechanisms of such diseases. These pioneering works indicate an enormous wealth of potential and provide a call to action for researchers to combine and leverage expertise and resources to create a clear and meaningful path forward. Doing so with efficacy and impact will require not only building on existing research, but also broadening collaborative networks, bolstering and deepening cross-disciplinary channels, and establishing unified and realizable objectives. The aim of this review is to briefly summarize the field and its underpinnings, provide a directory of the state of the art, outline the most encouraging paths forward, including their limitations, outlook and speculative upcoming breakthroughs, and finally to offer a vision of how to cultivate isotope metallomics for an impactful future.
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Affiliation(s)
- Brandon Mahan
- Earth and Environmental Sciences, James Cook University, Townsville, QLD, Australia.
- Department of Biomedical Research, Macquarie University, Sydney, NSW, 2109, Australia.
| | - Roger S Chung
- Department of Biomedical Research, Macquarie University, Sydney, NSW, 2109, Australia
| | - Dean L Pountney
- School of Medical Science, Griffith University, Southport, 4222, Australia
| | - Frédéric Moynier
- Université de Paris, Institut de Physique du Globe de Paris, CNRS, 75238, Paris, France
| | - Simon Turner
- Thermo Fisher Isotope Development Hub, Department of Earth and Environmental Sciences, Macquarie University, Sydney, NSW, 2109, Australia
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7
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Amsellem E, Moynier F, Bertrand H, Bouyon A, Mata J, Tappe S, Day JMD. Calcium isotopic evidence for the mantle sources of carbonatites. SCIENCE ADVANCES 2020; 6:eaba3269. [PMID: 32537505 PMCID: PMC7269651 DOI: 10.1126/sciadv.aba3269] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Accepted: 04/01/2020] [Indexed: 06/11/2023]
Abstract
The origin of carbonatites-igneous rocks with more than 50% of carbonate minerals-and whether they originate from a primary mantle source or from recycling of surface materials are still debated. Calcium isotopes have the potential to resolve the origin of carbonatites, since marine carbonates are enriched in the lighter isotopes of Ca compared to the mantle. Here, we report the Ca isotopic compositions for 74 carbonatites and associated silicate rocks from continental and oceanic settings, spanning from 3 billion years ago to the present day, together with O and C isotopic ratios for 37 samples. Calcium-, Mg-, and Fe-rich carbonatites have isotopically lighter Ca than mantle-derived rocks such as basalts and fall within the range of isotopically light Ca from ancient marine carbonates. This signature reflects the composition of the source, which is isotopically light and is consistent with recycling of surface carbonate materials into the mantle.
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Affiliation(s)
- Elsa Amsellem
- Institut de Physique du Globe de Paris, CNRS, Université de Paris, F-75005 Paris, France
| | - Frédéric Moynier
- Institut de Physique du Globe de Paris, CNRS, Université de Paris, F-75005 Paris, France
- Institut Universitaire de France, Paris, France
| | - Hervé Bertrand
- Laboratoire de Géologie de Lyon, Université Lyon 1 and Ecole Normale Supérieure de Lyon, CNRS UMR 5576, 46 allée d’Italie, 69364 Lyon Cedex 07, France
| | - Amaury Bouyon
- Institut de Physique du Globe de Paris, CNRS, Université de Paris, F-75005 Paris, France
| | - João Mata
- Instituto Dom Luiz, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal
| | - Sebastian Tappe
- Department of Geology, University of Johannesburg, 2006 Auckland Park, South Africa
| | - James M. D. Day
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093-0244, USA
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8
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Horning KJ, Joshi P, Nitin R, Balachandran RC, Yanko FM, Kim K, Christov P, Aschner M, Sulikowski GA, Weaver CD, Bowman AB. Identification of a selective manganese ionophore that enables nonlethal quantification of cellular manganese. J Biol Chem 2020; 295:3875-3890. [PMID: 32047113 PMCID: PMC7086026 DOI: 10.1074/jbc.ra119.009781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 02/11/2020] [Indexed: 01/14/2023] Open
Abstract
Available assays for measuring cellular manganese (Mn) levels require cell lysis, restricting longitudinal experiments and multiplexed outcome measures. Conducting a screen of small molecules known to alter cellular Mn levels, we report here that one of these chemicals induces rapid Mn efflux. We describe this activity and the development and implementation of an assay centered on this small molecule, named manganese-extracting small molecule (MESM). Using inductively-coupled plasma-MS, we validated that this assay, termed here "manganese-extracting small molecule estimation route" (MESMER), can accurately assess Mn in mammalian cells. Furthermore, we found evidence that MESM acts as a Mn-selective ionophore, and we observed that it has increased rates of Mn membrane transport, reduced cytotoxicity, and increased selectivity for Mn over calcium compared with two established Mn ionophores, calcimycin (A23187) and ionomycin. Finally, we applied MESMER to test whether prior Mn exposures subsequently affect cellular Mn levels. We found that cells receiving continuous, elevated extracellular Mn accumulate less Mn than cells receiving equally-elevated Mn for the first time for 24 h, indicating a compensatory cellular homeostatic response. Use of the MESMER assay versus a comparable detergent lysis-based assay, cellular Fura-2 Mn extraction assay, reduced the number of cells and materials required for performing a similar but cell lethality-based experiment to 25% of the normally required sample size. We conclude that MESMER can accurately quantify cellular Mn levels in two independent cells lines through an ionophore-based mechanism, maintaining cell viability and enabling longitudinal assessment within the same cultures.
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Affiliation(s)
- Kyle J. Horning
- Vanderbilt Brain Institute, Vanderbilt University, Nashville, Tennessee 37232
| | - Piyush Joshi
- Vanderbilt Brain Institute, Vanderbilt University, Nashville, Tennessee 37232
| | - Rachana Nitin
- Vanderbilt Brain Institute, Vanderbilt University, Nashville, Tennessee 37232
| | | | - Frank M. Yanko
- School of Health Sciences, Purdue University, West Lafayette, Indiana 47907
| | - Kwangho Kim
- Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee 37232,Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235
| | - Plamen Christov
- Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee 37232
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, New York 10461
| | - Gary A. Sulikowski
- Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee 37232,Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235,Department of Pharmacology, Vanderbilt University, Nashville, Tennessee 37212
| | - C. David Weaver
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235,Department of Pharmacology, Vanderbilt University, Nashville, Tennessee 37212
| | - Aaron B. Bowman
- Vanderbilt Brain Institute, Vanderbilt University, Nashville, Tennessee 37232,School of Health Sciences, Purdue University, West Lafayette, Indiana 47907, To whom correspondence should be addressed:
Purdue University, 550 Stadium Mall Dr., HAMP 1173A, West Lafayette, IN 47907-2051. E-mail:
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9
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Mahan B, Moynier F, Jørgensen AL, Habekost M, Siebert J. Examining the homeostatic distribution of metals and Zn isotopes in Göttingen minipigs. Metallomics 2019; 10:1264-1281. [PMID: 30128473 DOI: 10.1039/c8mt00179k] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The role of metals in biologic systems is manifold, and understanding their behaviour in bodily processes, especially those relating to neurodegenerative diseases, is at the forefront of medical science. The function(s) of metals - such as the transition metals - and their utility in both the diagnosis and treatment of diseases in human beings, is often examined via the characterization of their distribution in animal models, with porcine models considered exceptional proxies for human physiology. To this end, we have investigated the homeostatic distribution of numerous metals (Mg, K, Ca, Mn, Fe, Cu, Zn, Rb and Mo), the non-metal P, and Zn isotopes in the organs and blood (red blood cells, plasma) of Göttingen minipigs. These results represent the first set of data outlining the homeostatic distribution of metals and Zn isotopes in Göttingen minipigs, and indicate a relatively homogeneous distribution of alkali/alkaline earth metals and P among the organs, with generally lower levels in the blood, while indicating more heterogeneous and systematic abundance patterns for transition metals. In general, the distribution of all elements analysed is similar to that found in humans. Our elemental abundance data, together with data reported for humans in the literature, suggest that element-to-element ratios, e.g. Cu/Mg, show potential as simple diagnostics for diseases such as Alzheimer's. Isotopic data indicate a heterogeneous distribution of Zn isotopes among the organs and blood, with the liver, heart and brain being the most depleted in heavy Zn isotopes, and the blood the most enriched, consistent with observations in other animal models and humans. The Zn isotopic composition of Göttingen minipigs displays a systematic offset towards lighter δ66Zn values relative to mice and sheep models, suggesting physiology that is more closely aligned with that of humans. Cumulatively, these observations strongly suggest that Göttingen minipigs are an excellent animal model for translational research involving metals, and these data provide a strong foundation for future research.
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Affiliation(s)
- Brandon Mahan
- Institut de Physique du Globe de Paris, Université Paris Diderot, Sorbonne Paris Cité, CNRS UMR 7154, 1 rue Jussieu, 75238 Paris Cedex 05, France
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10
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Hassanin WF, Ibrahim NS, El-Barkouky EE, Abu-Taleb AM. Assessment of 47Ca Distribution and Biological Half-Life in Japanese Quail Chicks. BRAZILIAN JOURNAL OF POULTRY SCIENCE 2019. [DOI: 10.1590/1806-9061-2019-1028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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Tanaka YK, Hirata T. Stable Isotope Composition of Metal Elements in Biological Samples as Tracers for Element Metabolism. ANAL SCI 2018; 34:645-655. [PMID: 29887552 DOI: 10.2116/analsci.18sbr02] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Stable isotope composition varies due to different reactivity or mobility among the isotopes. Various pioneering studies revealed that isotope fractionation is common for many elements, and it is now widely recognized that the stable isotope compositions of biometals can be used as new tracers for element metabolism. In this review, we summarize the recently published isotope compositions of iron (Fe), copper (Cu), zinc (Zn), and calcium (Ca) in various biological samples, including tissues from plants, animals, and humans. Discussions were carried out with respect to age, sex, organ, and the presence or absence of particular diseases for animals and humans. For Fe and Cu isotopes, changes in oxidation states generate large isotopic fractionation through the metabolism of those elements. Isotope composition of Zn greatly fractionates among tissues even without changes in oxidation state. Isotopic composition of Ca is a powerful tracer for the metabolism of Ca in bones. The review results suggest that the stable isotope compositions of the biometals can be used as effective markers for diagnostics of various kinds of diseases related to metabolic disorders.
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Affiliation(s)
- Yu-Ki Tanaka
- Geochemical Research Center, The University of Tokyo
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12
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Tanaka YK, Yajima N, Higuchi Y, Yamato H, Hirata T. Calcium isotope signature: new proxy for net change in bone volume for chronic kidney disease and diabetic rats. Metallomics 2017; 9:1745-1755. [PMID: 29115324 DOI: 10.1039/c7mt00255f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Herein, we measure the Ca isotope ratios (44Ca/42Ca and 43Ca/42Ca) in serum and bone samples collected from rats with chronic kidney disease (CKD) or diabetes mellitus (DM). For the serum samples, the isotope ratios are lower for the CKD (δ44Ca/42Caserum = 0.16 ± 0.11‰; 2SD, n = 6) and the DM (δ44Ca/42Caserum = -0.11 ± 0.25‰; 2SD, n = 7) rats than that for the control rats (δ44Ca/42Caserum = 0.25 ± 0.04‰; 2SD, n = 7). Bone samples from two distinct positions of 20 rats in total, namely, the center and proximal parts of the tibial diaphysis, are subject to Ca isotope analysis. The resulting δ44Ca/42Ca values for the bone of the proximal part are about 0.3‰ lower than that for the serum samples from the same rats. The larger isotope fractionations between the serum and bone are consistent with previously reported data for vertebrate animals (e.g., Skulan and DePaolo, 1999), which suggests the preferential incorporation of lighter Ca isotopes through bone formation. For the bones from the control and CKD rats, there were no differences in the δ44Ca/42Ca values between the positions of the bone. In contrast, the δ44Ca/42Ca values of the bone for the DM rats were different between the positions of the bone. Due to the lower bone turnover rate for the DM rats, the δ44Ca/42Ca for the middle of the diaphysis can reflect the Ca isotopes in the bone formed prior to the progression of DM states. Thus, the resulting δ44Ca/42Ca values show a clear correlation with bone mineral density (BMD). This can be due to the release of isotopically lighter Ca from the bone to the serum. In the present study, our data demonstrate that the δ44Ca/42Ca value for serum can be used as a new biomarker for evaluating changes in bone turnover rate, followed by changes in bone volume.
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Affiliation(s)
- Yu-Ki Tanaka
- Laboratory for Planetary Sciences, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto, 606-8501, Japan. and Bone Analysis Section, Kureha Special Laboratory Co., Ltd, 3-26-2, Hyakunin-cho, Shinjuku-ku, Tokyo, 169-8503, Japan
| | - Nobuyuki Yajima
- Bone Analysis Section, Kureha Special Laboratory Co., Ltd, 3-26-2, Hyakunin-cho, Shinjuku-ku, Tokyo, 169-8503, Japan and Center for iPS Cell Research and Application, Kyoto University, 53, Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Yusuke Higuchi
- Adsorptive Medicine Technology Center, Kureha Co., Ltd, 3-26-2, Hyakunin-cho, Shinjuku-ku, Tokyo, 169-8503, Japan
| | - Hideyuki Yamato
- Adsorptive Medicine Technology Center, Kureha Co., Ltd, 3-26-2, Hyakunin-cho, Shinjuku-ku, Tokyo, 169-8503, Japan
| | - Takafumi Hirata
- Laboratory for Planetary Sciences, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto, 606-8501, Japan. and Geochemistry Research Center, The Univ. Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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Moynier F, Fujii T. Theoretical isotopic fractionation of magnesium between chlorophylls. Sci Rep 2017; 7:6973. [PMID: 28765587 PMCID: PMC5539320 DOI: 10.1038/s41598-017-07305-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 06/27/2017] [Indexed: 11/17/2022] Open
Abstract
Magnesium is the metal at the center of all types of chlorophyll and is thus crucial to photosynthesis. When an element is involved in a biosynthetic pathway its isotopes are fractionated based on the difference of vibrational frequency between the different molecules. With the technical advance of multi-collectors plasma-mass-spectrometry and improvement in analytical precision, it has recently been found that two types of chlorophylls (a and b) are isotopically distinct. These results have very significant implications with regards to the use of Mg isotopes to understand the biosynthesis of chlorophyll. Here we present theoretical constraints on the origin of these isotopic fractionations through ab initio calculations. We present the fractionation factor for chlorphyll a, b, d, and f. We show that the natural isotopic variations among chlorophyll a and b are well explained by isotopic fractionation under equilibrium, which implies exchanges of Mg during the chlorophyll cycle. We predict that chlorophyll d and f should be isotopically fractionated compared to chlorophyll a and that this could be used in the future to understand the biosynthesis of these molecules.
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Affiliation(s)
- Frédéric Moynier
- Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, CNRS, F-75005, Paris, France.
- Institut Universitaire de France, Paris, France.
| | - Toshiyuki Fujii
- Division of Sustainable Energy and Environmental Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
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