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de Pao Mendonca K, Chaurand P, Campos A, Angeletti B, Rovezzi M, Delage L, Borchiellini C, Le Bivic A, Issartel J, Renard E, Levard C. Hyper-accumulation of vanadium in animals: Two sponges compete with urochordates. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 914:169410. [PMID: 38123080 DOI: 10.1016/j.scitotenv.2023.169410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 12/11/2023] [Accepted: 12/13/2023] [Indexed: 12/23/2023]
Abstract
Vanadium (V) concentrations in organisms are usually very low. To date, among animals, only some urochordate and annelid species contain very high levels of V in their tissues. A new case of hyper-accumulation of V in a distinct animal phylum (Porifera), namely, the two homoscleromorph sponge species Oscarella lobularis and O. tuberculata is reported. The measured concentrations (up to 30 g/kg dry weight) exceed those reported previously and are not found in all sponge classes. In both Oscarella species, V is mainly accumulated in the surface tissues, and in mesohylar cells, as V(IV), before being partly reduced to V(III) in the deeper tissues. Candidate genes from Bacteria and sponges have been identified as possibly being involved in the metabolism of V. This finding provides clues for the development of bioremediation strategies in marine ecosystems and/or bioinspired processes to recycle this critical metal.
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Affiliation(s)
- Kassandra de Pao Mendonca
- Aix Marseille Univ, Avignon Univ, CNRS, IRD, IMBE, Marseille, France; Aix Marseille Univ, CNRS, IBDM UMR7288, Marseille, France
| | - Perrine Chaurand
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE, Aix-en-Provence, France
| | - Andrea Campos
- Aix Marseille Univ, CNRS, Centrale Marseille, FSCM (FR1739), CP2M, 13397 Marseille, France
| | - Bernard Angeletti
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE, Aix-en-Provence, France; Aix Marseille Univ, CNRS, FR 3098 ECCOREV, F-13545 Aix-en-Provence, France
| | - Mauro Rovezzi
- Univ. Grenoble Alpes, CNRS, IRD, Irstea, Météo France, OSUG, FAME, 38000 Grenoble, France
| | - Ludovic Delage
- CNRS, Integrative Biology of Marine Models (LBI2M, UMR8227), Station Biologique de Roscoff (SBR), Sorbonne Université, Roscoff, France
| | | | - André Le Bivic
- Aix Marseille Univ, CNRS, IBDM UMR7288, Marseille, France
| | - Julien Issartel
- Aix Marseille Univ, Avignon Univ, CNRS, IRD, IMBE, Marseille, France; Aix Marseille Univ, CNRS, FR 3098 ECCOREV, F-13545 Aix-en-Provence, France
| | - Emmanuelle Renard
- Aix Marseille Univ, Avignon Univ, CNRS, IRD, IMBE, Marseille, France; Aix Marseille Univ, CNRS, FR 3098 ECCOREV, F-13545 Aix-en-Provence, France.
| | - Clément Levard
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE, Aix-en-Provence, France.
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2
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Zatsepin P, Moriyama T, Chen C, Muratsugu S, Tada M, Yamashita M. Vanadium Alumanyl Complex: Synthesis, Characterization, Reactivity, and Application as a Catalyst for C-H Alumanylation of Alkenes. J Am Chem Soc 2024; 146:3492-3497. [PMID: 38279921 DOI: 10.1021/jacs.3c13418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2024]
Abstract
A complex containing a V-Al bond is described. This species can be prepared by either transmetalation of a previously disclosed alumanylpotassium with Cp2VCl or photolytic oxidative alumination of Cp2V using the corresponding dialumane. Reaction of the resulting V-Al complex with H2 gave a Cp2V-dihydridoaluminate complex. These complexes were studied with X-ray crystallography, vanadium K-edge XANES spectroscopy, and DFT calculations. Finally, the reactivity of these molecules was studied opening the way to a catalytic C-H alumanylation of alkenes.
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Affiliation(s)
- Pavel Zatsepin
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Aichi, Japan
| | - Takumi Moriyama
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Aichi, Japan
| | - Chaoqi Chen
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Aichi, Japan
| | - Satoshi Muratsugu
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Aichi, Japan
- Integrated Research Consortium on Chemical Science (IRCCS), Nagoya University, Tokai National Higher Education and Research System, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Mizuki Tada
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Aichi, Japan
- Integrated Research Consortium on Chemical Science (IRCCS), Nagoya University, Tokai National Higher Education and Research System, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
- Research Center for Materials Science (RCMS), Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Aichi, Japan
| | - Makoto Yamashita
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Aichi, Japan
- Integrated Research Consortium on Chemical Science (IRCCS), Nagoya University, Tokai National Higher Education and Research System, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
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3
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Hall JN, Chapovetsky A, Kanbur U, Kim YL, McCullough KE, Syed ZH, Johnson CS, Ferrandon MS, Liu C, Kropf AJ, Delferro M, Kaphan DM. Oxidative Grafting for Catalyst Synthesis in Surface Organometallic Chemistry. ACS APPLIED MATERIALS & INTERFACES 2023; 15:53498-53514. [PMID: 37945527 DOI: 10.1021/acsami.3c12656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
The development of new methods of catalyst synthesis with the potential to generate active site structures orthogonal to those accessible by traditional protocols is of great importance for discovering new materials for addressing challenges in the evolving energy and chemical economy. In this work, the generality of oxidative grafting of organometallic and well-defined molecular metal precursors onto redox-active surfaces such as manganese dioxide (MnO2) and lithium manganese oxide (LiMn2O4) is investigated. Nine molecular metal precursors are explored, spanning groups 4-11 and each of the three periods of the transition metal series. The byproducts of the oxidative grafting reaction, a mixture of protodemetalation and ligand homocoupling for several organometallic precursors, was found to provide insights into the mechanism of the grafting reaction, suggesting oxidation of both the metal d-orbitals, as well as the metal-carbon σ-bonds, resulting in ejection of the ligand radical fragment. Analysis of the supported structures and oxidation state by X-ray absorption spectroscopy (XAS) and X-ray photoelectron spectroscopy (XPS) suggests that several of the chemisorbed metal ions are intercalated into interstitial vacancies of the surface structure while other complexes form intact molecular fragments on the surface. Proof of concept for the use of this metalation protocol to generate diverse, metal-dependent catalytic performance is demonstrated by the application of these materials in the conversion of cyclohexane to K/A oil (cyclohexanol and cyclohexanone) with tert-butyl hydroperoxide, as well as in the low-temperature (T ≤ 50 °C) oxidation of carbon monoxide to carbon dioxide.
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Affiliation(s)
- Jacklyn N Hall
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Alon Chapovetsky
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Uddhav Kanbur
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Yu Lim Kim
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Katherine E McCullough
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Zoha H Syed
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Christopher S Johnson
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Magali S Ferrandon
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Cong Liu
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - A Jeremy Kropf
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Massimiliano Delferro
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - David M Kaphan
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
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4
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Zhu K, Tao Y, Clark DE, Hong W, Li CW. Solution-Phase Synthesis of Vanadium Intercalated 1T'-WS 2 with Tunable Electronic Properties. NANO LETTERS 2023; 23:4471-4478. [PMID: 37155184 DOI: 10.1021/acs.nanolett.3c00826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Metal ion intercalation into Group VI transition metal dichalcogenides enables control over their carrier transport properties. In this work, we demonstrate a low-temperature, solution-phase synthetic method to intercalate cationic vanadium complexes into bulk WS2. Vanadium intercalation expands the interlayer spacing from 6.2 to 14.2 Å and stabilizes the 1T' phase of WS2. Kelvin-probe force microscopy measurements indicate that vanadium binding in the van der Waals gap causes an increase in the Fermi level of 1T'-WS2 by 80 meV due to hybridization of vanadium 3d orbitals with the conduction band of the TMD. As a result, the carrier type switches from p-type to n-type, and carrier mobility increases by an order of magnitude relative to the Li-intercalated precursor. Both the conductivity and thermal activation barrier for carrier transport are readily tuned by varying the concentration of VCl3 during the cation-exchange reaction.
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Affiliation(s)
- Kuixin Zhu
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Yiyin Tao
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Daniel E Clark
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Wei Hong
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Christina W Li
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
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5
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Wang L, Liu Y, Wang H, Yang T, Luo Y, Lee S, Kim MG, Nga TTT, Dong CL, Lee H. Oxygen-Bridged Vanadium Single-Atom Dimer Catalysts Promoting High Faradaic Efficiency of Ammonia Electrosynthesis. ACS NANO 2023; 17:7406-7416. [PMID: 37042711 DOI: 10.1021/acsnano.2c11954] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Single-atom catalysts have already been widely investigated for the nitrogen reduction reaction (NRR). However, the simplicity of a single atom as an active center encounters the challenge of modulating the multiple reaction intermediates during the NRR process. Moving toward the single-atom-dimer (SAD) structures can not only buffer the multiple reaction intermediates but also provide a strategy to modify the electronic structure and environment of the catalysts. Here, a structure of a vanadium SAD (V-O-V) catalyst on N-doped carbon (O-V2-NC) is proposed for the electrochemical nitrogen reduction reaction, in which the vanadium dimer is coordinated with nitrogen and simultaneously bridged by one oxygen. The oxygen-bridged metal atom dimer that has more electron deficiency is perceived to be the active center for nitrogen reduction. A loop evolution of the intermediate structure was found during the theoretical process simulated by density functional theory (DFT) calculation. The active center V-O-V breaks down to V-O and V during the protonation process and regenerates to the original V-O-V structure after releasing all the nitrogen species. Thus, the O-V2-NC structure presents excellent activity toward the electrochemical NRR, achieving an outstanding faradaic efficiency (77%) along with the yield of 9.97 μg h-1 mg-1 at 0 V (vs RHE) and comparably high ammonia yield (26 μg h-1 mg-1) with the FE of 4.6% at -0.4 V (vs RHE). This report synthesizes and proves the peculiar V-O-V dimer structure experimentally, which also contributes to the library of SAD catalysts with superior performance.
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Affiliation(s)
- Lingling Wang
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Yang Liu
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Hongdan Wang
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Taehun Yang
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Yongguang Luo
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Seungeun Lee
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Min Gyu Kim
- Beamline Research Division, Pohang Accelerator Laboratory (PAL), Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Ta Thi Thuy Nga
- Department of Physics, Tamkang University, New Taipei City 25137, Taiwan
| | - Chung-Li Dong
- Department of Physics, Tamkang University, New Taipei City 25137, Taiwan
| | - Hyoyoung Lee
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon 16419, Republic of Korea
- Department of Biophysics, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Creative Research Institute, Sungkyunkwan University, Suwon 16419, Republic of Korea
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6
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Ferraro G, Paolillo M, Sciortino G, Garribba E, Merlino A. Multiple and Variable Binding of Pharmacologically Active Bis(maltolato)oxidovanadium(IV) to Lysozyme. Inorg Chem 2022; 61:16458-16467. [PMID: 36205235 PMCID: PMC9579999 DOI: 10.1021/acs.inorgchem.2c02690] [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
![]()
The interaction with
proteins of metal-based drugs plays a crucial
role in their transport, mechanism, and activity. For an active MLn complex, where L is the organic carrier,
various binding modes (covalent and non-covalent, single or multiple)
may occur and several metal moieties (M, ML, ML2, etc.)
may interact with proteins. In this study, we have evaluated the interaction
of [VIVO(malt)2] (bis(maltolato)oxidovanadium(IV)
or BMOV, where malt = maltolato, i.e., the common name for 3-hydroxy-2-methyl-4H-pyran-4-onato) with the model protein hen egg white lysozyme
(HEWL) by electrospray ionization mass spectrometry, electron paramagnetic
resonance, and X-ray crystallography. The multiple binding of different
V-containing isomers and enantiomers to different sites of HEWL is
observed. The data indicate both non-covalent binding of cis-[VO(malt)2(H2O)] and [VO(malt)(H2O)3]+ and covalent binding of [VO(H2O)3–4]2+ and cis-[VO(malt)2] and other V-containing fragments to the side chains of Glu35,
Asp48, Asn65, Asp87, and Asp119 and to the C-terminal carboxylate.
Our results suggest that the multiple and variable interactions of
potential VIVOL2 drugs with proteins can help
to better understand their solution chemistry and contribute to define
the molecular basis of the mechanism of action of these intriguing
molecules. The interaction of [VIVO(malt)2] (BMOV,
malt = maltolato) with hen egg white lysozyme (HEWL) reveals the multiple
binding of different V-containing isomers and enantiomers to different
sites and non-covalent and covalent binding of cis-[VO(malt)2(H2O)], [VO(malt)(H2O)3]+, [VO(H2O)3−4]2+, and cis-[VO(malt)2] to Glu,
Asp, and Asn residues.
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Affiliation(s)
- Giarita Ferraro
- Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario di Monte Sant'Angelo, Via Cintia, I-80126 Napoli, Italy
| | - Maddalena Paolillo
- Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario di Monte Sant'Angelo, Via Cintia, I-80126 Napoli, Italy
| | - Giuseppe Sciortino
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, 43007 Tarragona, Spain
| | - Eugenio Garribba
- Dipartimento di Medicina, Chirurgia e Farmacia, Università di Sassari, Viale San Pietro, I-07100 Sassari, Italy
| | - Antonello Merlino
- Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario di Monte Sant'Angelo, Via Cintia, I-80126 Napoli, Italy
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7
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Jiang S, Liu Y, Wang L, Chai Z, Shi W. The Coordination Chemistry of f‐Block Elements in Molten Salts. Chemistry 2022; 28:e202201145. [DOI: 10.1002/chem.202201145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Shilin Jiang
- Laboratory of Nuclear Energy Chemistry Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Yalan Liu
- Laboratory of Nuclear Energy Chemistry Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Lin Wang
- Laboratory of Nuclear Energy Chemistry Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Zhifang Chai
- Laboratory of Nuclear Energy Chemistry Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Wei‐Qun Shi
- Laboratory of Nuclear Energy Chemistry Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 P. R. China
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Levina A, Crans DC, Lay PA. Advantageous Reactivity of Unstable Metal Complexes: Potential Applications of Metal-Based Anticancer Drugs for Intratumoral Injections. Pharmaceutics 2022; 14:790. [PMID: 35456624 PMCID: PMC9026487 DOI: 10.3390/pharmaceutics14040790] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/24/2022] [Accepted: 03/29/2022] [Indexed: 11/30/2022] Open
Abstract
Injections of highly cytotoxic or immunomodulating drugs directly into the inoperable tumor is a procedure that is increasingly applied in the clinic and uses established Pt-based drugs. It is advantageous for less stable anticancer metal complexes that fail administration by the standard intravenous route. Such hydrophobic metal-containing complexes are rapidly taken up into cancer cells and cause cell death, while the release of their relatively non-toxic decomposition products into the blood has low systemic toxicity and, in some cases, may even be beneficial. This concept was recently proposed for V(V) complexes with hydrophobic organic ligands, but it can potentially be applied to other metal complexes, such as Ti(IV), Ga(III) and Ru(III) complexes, some of which were previously unsuccessful in human clinical trials when administered via intravenous injections. The potential beneficial effects include antidiabetic, neuroprotective and tissue-regenerating activities for V(V/IV); antimicrobial activities for Ga(III); and antimetastatic and potentially immunogenic activities for Ru(III). Utilizing organic ligands with limited stability under biological conditions, such as Schiff bases, further enhances the tuning of the reactivities of the metal complexes under the conditions of intratumoral injections. However, nanocarrier formulations are likely to be required for the delivery of unstable metal complexes into the tumor.
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Affiliation(s)
- Aviva Levina
- School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Debbie C. Crans
- Department of Chemistry and the Cell and Molecular Biology Program, Colorado State University, Fort Collins, CO 80523, USA
| | - Peter A. Lay
- School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
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9
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Greiner S, Hettig J, Laws A, Baumgärtner K, Bustos J, Pöppler A, Clark AH, Nyman M, Streb C, Anjass M. A General Access Route to High‐Nuclearity, Metal‐Functionalized Molecular Vanadium Oxides. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202114548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Simon Greiner
- Institute of Inorganic Chemistry I Ulm University Albert-Einstein-Allee 11 89081 Ulm Germany
- Helmholtz Institute Ulm (HIU) Helmholtzstraße 11 89081 Ulm Germany
| | - Jan Hettig
- Institute of Inorganic Chemistry I Ulm University Albert-Einstein-Allee 11 89081 Ulm Germany
- Helmholtz Institute Ulm (HIU) Helmholtzstraße 11 89081 Ulm Germany
| | - Alec Laws
- Institute of Inorganic Chemistry I Ulm University Albert-Einstein-Allee 11 89081 Ulm Germany
- Helmholtz Institute Ulm (HIU) Helmholtzstraße 11 89081 Ulm Germany
| | - Katharina Baumgärtner
- Institute of Inorganic Chemistry I Ulm University Albert-Einstein-Allee 11 89081 Ulm Germany
- Helmholtz Institute Ulm (HIU) Helmholtzstraße 11 89081 Ulm Germany
| | - Jenna Bustos
- Department of Chemistry Oregon State University Corvallis OR 97331 USA
| | - Ann‐Christin Pöppler
- Institute of Organic Chemistry University of Wuerzburg Am Hubland 97074 Wuerzburg Germany
| | - Adam H. Clark
- Paul Scherrer Institute Forschungsstraße 111 5232 Villingen Switzerland
| | - May Nyman
- Department of Chemistry Oregon State University Corvallis OR 97331 USA
| | - Carsten Streb
- Institute of Inorganic Chemistry I Ulm University Albert-Einstein-Allee 11 89081 Ulm Germany
- Helmholtz Institute Ulm (HIU) Helmholtzstraße 11 89081 Ulm Germany
| | - Montaha Anjass
- Institute of Inorganic Chemistry I Ulm University Albert-Einstein-Allee 11 89081 Ulm Germany
- Helmholtz Institute Ulm (HIU) Helmholtzstraße 11 89081 Ulm Germany
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10
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Greiner S, Hettig J, Laws A, Baumgärtner K, Bustos J, Pöppler AC, Adam C, Nyman M, Streb C, Anjass M. A General Access Route to High-Nuclearity, Metal-Functionalized Molecular Vanadium Oxides. Angew Chem Int Ed Engl 2021; 61:e202114548. [PMID: 34936179 PMCID: PMC9302674 DOI: 10.1002/anie.202114548] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Indexed: 10/26/2022]
Abstract
Molecular metal oxides are key materials in diverse fields like energy storage and conversion, molecular magnetism and as model systems for solid-state metal oxides. To improve their performance and increase the variety of accessible motifs, new synthetic approaches are necessary. Herein, we report a universal, new precursor to access different metal-functionalized polyoxovanadate (POV) clusters. The precursor is synthesized by a novel solid-state thermal treatment procedure. Solution-phase test reactions at room temperature and pressure show that reaction of the precursor with various metal nitrate salts gives access to a range of metal-functionalized POVs. The first nitrate-templated molecular calcium vanadate cluster is reported. We show that this precursor could open new access routes to POV components for molecular magnetism, energy technologies or catalysis.
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Affiliation(s)
| | - Jan Hettig
- Ulm University: Universitat Ulm, Chemistry, GERMANY
| | - Alec Laws
- Ulm University: Universitat Ulm, Chemistry, GERMANY
| | | | - Jenna Bustos
- Oregon State University, Chemistry, UNITED STATES
| | | | - Clark Adam
- Paul Scherrer Institute: Paul Scherrer Institut, Chemistry, SWITZERLAND
| | - May Nyman
- Oregon State University, Chemistry, UNITED STATES
| | - Carsten Streb
- Ulm University: Universitat Ulm, Institute of Inorganic Chemistry I, Albert-Einstein-Allee 11, 89081, Ulm, GERMANY
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11
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Pessoa JC, Santos MF, Correia I, Sanna D, Sciortino G, Garribba E. Binding of vanadium ions and complexes to proteins and enzymes in aqueous solution. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214192] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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12
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Li J, Li Y, Routh PK, Makagon E, Lubomirsky I, Frenkel AI. Comparative analysis of XANES and EXAFS for local structural characterization of disordered metal oxides. JOURNAL OF SYNCHROTRON RADIATION 2021; 28:1511-1517. [PMID: 34475298 DOI: 10.1107/s1600577521007025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 07/07/2021] [Indexed: 06/13/2023]
Abstract
In functional materials, the local environment around active species that may contain just a few nearest-neighboring atomic shells often changes in response to external conditions. Strong disorder in the local environment poses a challenge to commonly used extended X-ray absorption fine structure (EXAFS) analysis. Furthermore, the dilute concentrations of absorbing atoms, small sample size and the constraints of the experimental setup often limit the utility of EXAFS for structural analysis. X-ray absorption near-edge structure (XANES) has been established as a good alternative method to provide local electronic and geometric information of materials. The pre-edge region in the XANES spectra of metal compounds is a useful but relatively under-utilized resource of information of the chemical composition and structural disorder in nano-materials. This study explores two examples of materials in which the transition metal environment is either relatively symmetric or strongly asymmetric. In the former case, EXAFS results agree with those obtained from the pre-edge XANES analysis, whereas in the latter case they are in a seeming contradiction. The two observations are reconciled by revisiting the limitations of EXAFS in the case of a strong, asymmetric bond length disorder, expected for mixed-valence oxides, and emphasize the utility of the pre-edge XANES analysis for detecting local heterogeneities in structural and compositional motifs.
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Affiliation(s)
- Junying Li
- Materials Science and Chemical Engineering, Stony Brook University, 100 Nicolls Road, Stony Brook, NY 11794, USA
| | - Yuanyuan Li
- Materials Science and Chemical Engineering, Stony Brook University, 100 Nicolls Road, Stony Brook, NY 11794, USA
| | - Prahlad K Routh
- Materials Science and Chemical Engineering, Stony Brook University, 100 Nicolls Road, Stony Brook, NY 11794, USA
| | - Evgeniy Makagon
- Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Igor Lubomirsky
- Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Anatoly I Frenkel
- Materials Science and Chemical Engineering, Stony Brook University, 100 Nicolls Road, Stony Brook, NY 11794, USA
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13
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Lutz DM, Dunkin MR, Tallman KR, Wang L, Housel LM, Yang S, Zhang B, Liu P, Bock DC, Zhu Y, Marschilok AC, Takeuchi ES, Takeuchi KJ. Local and Bulk Probe of Vanadium-Substituted α-Manganese Oxide (α-K xV yMn 8-yO 16) Lithium Electrochemistry. Inorg Chem 2021; 60:10398-10414. [PMID: 34236171 DOI: 10.1021/acs.inorgchem.1c00954] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A series of V-substituted α-MnO2 (KxMn8-yVyO16·nH2O, y = 0, 0.2, 0.34, 0.75) samples were successfully synthesized without crystalline or amorphous impurities, as evidenced by X-ray diffraction (XRD) and Raman spectroscopy. Transmission electron microscopy (TEM) revealed a morphological evolution from nanorods to nanoplatelets as V-substitution increased, while electron-energy loss spectroscopy (EELS) confirmed uniform distribution of vanadium within the materials. Rietveld refinement of synchrotron XRD showed an increase in bond lengths and a larger range of bond angles with increasing V-substitution. X-ray absorption spectroscopy (XAS) of the as-prepared materials revealed the V valence to be >4+ and the Mn valence to decrease with increasing V content. Upon electrochemical lithiation, increasing amounts of V were found to preserve the Mn-Mnedge relationship at higher depths of discharge, indicating enhanced structural stability. Electrochemical testing showed the y = 0.75 V-substituted sample to deliver the highest capacity and capacity retention after 50 cycles. The experimental findings were consistent with the predictions of density functional theory (DFT), where the V centers impart structural stability to the manganese oxide framework upon lithiation. The enhanced electrochemistry of the y = 0.75 V-substituted sample is also attributed to its smaller crystallite size in the form of a nanoplatelet morphology, which promotes facile ion access via reduced Li-ion diffusion path lengths.
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Affiliation(s)
- Diana M Lutz
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States.,Institute for Electrochemically Stored Energy, Stony Brook University, Stony Brook, New York 11794, United States
| | - Mikaela R Dunkin
- Institute for Electrochemically Stored Energy, Stony Brook University, Stony Brook, New York 11794, United States.,Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Killian R Tallman
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States.,Institute for Electrochemically Stored Energy, Stony Brook University, Stony Brook, New York 11794, United States
| | - Lei Wang
- Institute for Electrochemically Stored Energy, Stony Brook University, Stony Brook, New York 11794, United States.,Interdisciplinary Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Lisa M Housel
- Institute for Electrochemically Stored Energy, Stony Brook University, Stony Brook, New York 11794, United States.,Interdisciplinary Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Shize Yang
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Bingjie Zhang
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
| | - Ping Liu
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - David C Bock
- Institute for Electrochemically Stored Energy, Stony Brook University, Stony Brook, New York 11794, United States.,Interdisciplinary Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Yimei Zhu
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States.,Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794, United States
| | - Amy C Marschilok
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States.,Institute for Electrochemically Stored Energy, Stony Brook University, Stony Brook, New York 11794, United States.,Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States.,Interdisciplinary Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Esther S Takeuchi
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States.,Institute for Electrochemically Stored Energy, Stony Brook University, Stony Brook, New York 11794, United States.,Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States.,Interdisciplinary Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Kenneth J Takeuchi
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States.,Institute for Electrochemically Stored Energy, Stony Brook University, Stony Brook, New York 11794, United States.,Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States.,Interdisciplinary Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States
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14
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Abstract
Fe(II)-bearing minerals (magnetite, siderite, green rust, etc.) are common products of microbial Fe(III) reduction, and they provide a reservoir of reducing capacity in many subsurface environments that may contribute to the reduction of redox active elements such as vanadium; which can exist as V(V), V(IV), and V(III) under conditions typical of near-surface aquatic and terrestrial environments. To better understand the redox behavior of V under ferrugenic/sulfidogenic conditions, we examined the interactions of V(V) (1 mM) in aqueous suspensions containing 50 mM Fe(II) as magnetite, siderite, vivianite, green rust, or mackinawite, using X-ray absorption spectroscopy at the V K-edge to determine the valence state of V. Two additional systems of increased complexity were also examined, containing either 60 mM Fe(II) as biogenic green rust (BioGR) or 40 mM Fe(II) as a mixture of biogenic siderite, mackinawite, and magnetite (BioSMM). Within 48 h, total solution-phase V concentrations decreased to <20 µM in all but the vivianite and the biogenic BiSMM systems; however, >99.5% of V was removed from solution in the BioSMM and vivianite systems within 7 and 20 months, respectively. The most rapid reduction was observed in the mackinawite system, where V(V) was reduced to V(III) within 48 h. Complete reduction of V(V) to V(III) occurred within 4 months in the green rust system, 7 months in the siderite system, and 20 months in the BioGR system. Vanadium(V) was only partially reduced in the magnetite, vivianite, and BioSMM systems, where within 7 months the average V valence state stabilized at 3.7, 3.7, and 3.4, respectively. The reduction of V(V) in soils and sediments has been largely attributed to microbial activity, presumably involving direct enzymatic reduction of V(V); however the reduction of V(V) by Fe(II)-bearing minerals suggests that abiotic or coupled biotic–abiotic processes may also play a critical role in V redox chemistry, and thus need to be considered in modeling the global biogeochemical cycling of V.
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15
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El Omari K, Mohamad N, Bountra K, Duman R, Romano M, Schlegel K, Kwong HS, Mykhaylyk V, Olesen C, Moller JV, Bublitz M, Beis K, Wagner A. Experimental phasing with vanadium and application to nucleotide-binding membrane proteins. IUCRJ 2020; 7:1092-1101. [PMID: 33209320 PMCID: PMC7642786 DOI: 10.1107/s2052252520012312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 09/07/2020] [Indexed: 06/11/2023]
Abstract
The structure determination of soluble and membrane proteins can be hindered by the crystallographic phase problem, especially in the absence of a suitable homologous structure. Experimental phasing is the method of choice for novel structures; however, it often requires heavy-atom derivatization, which can be difficult and time-consuming. Here, a novel and rapid method to obtain experimental phases for protein structure determination by vanadium phasing is reported. Vanadate is a transition-state mimic of phosphoryl-transfer reactions and it has the advantage of binding specifically to the active site of numerous enzymes catalyzing this reaction. The applicability of vanadium phasing has been validated by determining the structures of three different protein-vanadium complexes, two of which are integral membrane proteins: the rabbit sarcoplasmic reticulum Ca2+-ATPase, the antibacterial peptide ATP-binding cassette transporter McjD from Escherichia coli and the soluble enzyme RNAse A from Bos taurus. Vanadium phasing was successful even at low resolution and despite severe anisotropy in the data. This method is principally applicable to a large number of proteins, representing six of the seven Enzyme Commission classes. It relies exclusively on the specific chemistry of the protein and it does not require any modifications, making it a very powerful addition to the phasing toolkit. In addition to the phasing power of this technique, the protein-vanadium complexes also provide detailed insights into the reaction mechanisms of the studied proteins.
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Affiliation(s)
- Kamel El Omari
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, United Kingdom
- Research Complex at Harwell, Rutherford Appleton Laboratory, Didcot OX11 0FA, United Kingdom
| | - Nada Mohamad
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, United Kingdom
| | - Kiran Bountra
- Research Complex at Harwell, Rutherford Appleton Laboratory, Didcot OX11 0FA, United Kingdom
- Department of Life Sciences, Imperial College, London, United Kingdom
| | - Ramona Duman
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, United Kingdom
- Research Complex at Harwell, Rutherford Appleton Laboratory, Didcot OX11 0FA, United Kingdom
| | - Maria Romano
- Research Complex at Harwell, Rutherford Appleton Laboratory, Didcot OX11 0FA, United Kingdom
- Department of Life Sciences, Imperial College, London, United Kingdom
- Institute of Biostructures and Bioimaging, National Research Council (IBB–CNR), Via Mezzocannone 16, 80134 Napoli, Italy
| | - Katja Schlegel
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, United Kingdom
| | - Hok-Sau Kwong
- Research Complex at Harwell, Rutherford Appleton Laboratory, Didcot OX11 0FA, United Kingdom
- Department of Life Sciences, Imperial College, London, United Kingdom
| | - Vitaliy Mykhaylyk
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, United Kingdom
- Research Complex at Harwell, Rutherford Appleton Laboratory, Didcot OX11 0FA, United Kingdom
| | - Claus Olesen
- Department of Biomedicine, Aarhus University, Ole Worms Allé 8, DK-8000 Aarhus, Denmark
| | - Jesper Vuust Moller
- Department of Biomedicine, Aarhus University, Ole Worms Allé 8, DK-8000 Aarhus, Denmark
| | - Maike Bublitz
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, United Kingdom
| | - Konstantinos Beis
- Research Complex at Harwell, Rutherford Appleton Laboratory, Didcot OX11 0FA, United Kingdom
- Department of Life Sciences, Imperial College, London, United Kingdom
| | - Armin Wagner
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, United Kingdom
- Research Complex at Harwell, Rutherford Appleton Laboratory, Didcot OX11 0FA, United Kingdom
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16
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Ugone V, Sanna D, Sciortino G, Crans DC, Garribba E. ESI-MS Study of the Interaction of Potential Oxidovanadium(IV) Drugs and Amavadin with Model Proteins. Inorg Chem 2020; 59:9739-9755. [PMID: 32585093 PMCID: PMC8008395 DOI: 10.1021/acs.inorgchem.0c00969] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Indexed: 01/13/2023]
Abstract
In this study, the binding to lysozyme (Lyz) of four important VIV compounds with antidiabetic and/or anticancer activity, [VIVO(pic)2(H2O)], [VIVO(ma)2], [VIVO(dhp)2], and [VIVO(acac)2], where pic-, ma-, dhp-, and acac- are picolinate, maltolate, 1,2-dimethyl-3-hydroxy-4(1H)-pyridinonate, and acetylacetonate anions, and of the vanadium-containing natural product amavadin ([VIV(hidpa)2]2-, with hidpa3- N-hydroxyimino-2,2'-diisopropionate) was investigated by ElectroSpray Ionization-Mass Spectrometry (ESI-MS). Moreover, the interaction of [VIVO(pic)2(H2O)], chosen as a representative VIVO2+ complex, was examined with two additional proteins, myoglobin (Mb) and ubiquitin (Ub), to compare the data. The examined vanadium concentration was in the range 15-150 μM, i.e., very close to that found under physiological conditions. With pic-, dhp-, and hidpa3-, the formation of adducts n[VIVOL2]-Lyz or n[VIVL2]-Lyz is favored, while with ma- and acac- the species n[VIVOL]-Lyz are detected, with n dependent on the experimental VIV/protein ratio. The behavior of the systems with [VIVO(pic)2(H2O)] and Mb or Ub is very similar to that of Lyz. The results suggested that under physiological conditions, the moiety cis-VIVOL2 (L = pic-, dhp-) is bound by only one accessible side-chain protein residue that can be Asp, Glu, or His, while VIVOL+ (L = ma-, acac-) can interact with the two equatorial and axial sites. If the VIV complex is thermodynamically stable and does not have available coordination positions, such as amavadin, the protein cannot interact with it through the formation of coordination bonds and, in such cases, noncovalent interactions are predicted. The formation of the adducts is dependent on the thermodynamic stability and geometry in aqueous solution of the VIVO2+ complex and affects the transport, uptake, and mechanism of action of potential V drugs.
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Affiliation(s)
- Valeria Ugone
- Dipartimento
di Chimica e Farmacia, Università
di Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - Daniele Sanna
- Istituto
CNR di Chimica Biomolecolare, Trav. La Crucca 3, I-07040 Sassari, Italy
| | - Giuseppe Sciortino
- Dipartimento
di Chimica e Farmacia, Università
di Sassari, Via Vienna 2, I-07100 Sassari, Italy
- Departament
de Química, Universitat Autònoma
de Barcelona, 08193 Cerdanyola del Vallés, Barcelona, Spain
| | - Debbie C. Crans
- Department
of Chemistry, Colorado State University, 1301 Center Avenue, Fort Collins, Colorado, United States
| | - Eugenio Garribba
- Dipartimento
di Chimica e Farmacia, Università
di Sassari, Via Vienna 2, I-07100 Sassari, Italy
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17
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Vessey CJ, Lindsay MBJ. Aqueous Vanadate Removal by Iron(II)-Bearing Phases under Anoxic Conditions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:4006-4015. [PMID: 32142601 DOI: 10.1021/acs.est.9b06250] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Vanadium contamination is a growing environmental hazard worldwide. Aqueous vanadate (HxVVO4(3-x)-(aq)) concentrations are often controlled by surface complexation with metal (oxyhydr)oxides in oxic environments. However, the geochemical behavior of this toxic redox-sensitive oxyanion in anoxic environments is poorly constrained. Here, we describe results of batch experiments to determine kinetics and mechanisms of aqueous H2VVO4- (100 μM) removal under anoxic conditions in suspensions (2.0 g L-1) of magnetite, siderite, pyrite, and mackinawite. We present results of parallel experiments using ferrihydrite (2.0 g L-1) and Fe2+(aq) (200 μM) for comparison. Siderite and mackinawite reached near complete removal (46 μmol g-1) of aqueous vanadate after 3 h and rates were generally consistent with ferrihydrite, whereas magnetite removed 18 μmol g-1 of aqueous vanadate after 48 h and uptake by pyrite was limited. Removal during reaction with Fe2+(aq) was observed after 8 h, concomitant with precipitation of secondary Fe phases. X-ray absorption spectroscopy revealed V(V) reduction to V(IV) and formation of bidentate corner-sharing surface complexes on magnetite and siderite, and with Fe2+(aq) reaction products. These data also suggest that V(IV) is incorporated into the mackinawite structure. Overall, we demonstrate that Fe(II)-bearing phases can promote aqueous vanadate attenuation and, therefore, limit dissolved V concentrations in anoxic environments.
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Affiliation(s)
- Colton J Vessey
- Department of Geological Sciences, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada
| | - Matthew B J Lindsay
- Department of Geological Sciences, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada
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18
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X-ray absorption spectroscopy principles and practical use in materials analysis. PHYSICAL SCIENCES REVIEWS 2020. [DOI: 10.1515/psr-2017-0181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe X-ray Absorption Fine Structure (XAFS) with its subregions X-ray Absorption Near-edge Structure (XANES) and Extended X-ray Absorption Fine Structure (EXAFS) is a powerful tool for the structural analysis of materials, which is nowadays a standard component of research strategies in many fields. This review covers a wide range of topics related to its measurement and use: the origin of the fine structure, its analytical potential, derived from the physical basis, the environment for measuring XAFS at synchrotrons, including different measurement geometries, detection modes, and sample environments, e. g. for in-situ and operando work, the principles of data reduction, analysis, and interpretation, and a perspective on new methods for structure analysis combining X-ray absorption with X-ray emission. Examples for the application of XAFS have been selected from work with heterogeneous catalysts with the intention to demonstrate the strength of the method providing structural information about highly disperse and disordered systems, to illustrate pitfalls in the interpretation of results (e. g. by neglecting the averaged character of the information obtained) and to show how its merits can be further enhanced by combination with other methods of structural analysis and/or spectroscopy.
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19
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Ugone V, Sanna D, Sciortino G, Maréchal JD, Garribba E. Interaction of Vanadium(IV) Species with Ubiquitin: A Combined Instrumental and Computational Approach. Inorg Chem 2019; 58:8064-8078. [PMID: 31140794 DOI: 10.1021/acs.inorgchem.9b00807] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The interaction of VIVO2+ ion and five VIVOL2 compounds with potential pharmacological application, where L indicates maltolate (ma), kojate (koj), acetylacetonate (acac), 1,2-dimethyl-3-hydroxy-4(1 H)-pyridinonate (dhp), and l-mimosinate (mim), with ubiquitin (Ub) was studied by EPR, ESI-MS, and computational (docking and DFT) methods. The free metal ion VIVO2+ interacts with Glu, Asp, His, Thr, and Leu residues, but the most stable sites (named 1 and 2) involve the coordination of (Glu16, Glu18) and (Glu24, Asp52). In the system with VIVOL2 compounds, the type of binding depends on the vanadium concentration. When the concentration is in the mM range, the binding occurs with cis-VOL2(H2O), L = ma, koj, dhp, and mim, or with VO(acac)2: in the first case, the equatorial coordination of His68, Glu16, Glu18, or Asp21 residues yields species with formula n[VOL2]-Ub where n = 2-3, while with VO(acac)2 only noncovalent surface interactions are revealed. When the concentration of V is on the order of micromolar, the mono-chelated species VOL(H2O)2+ with L = ma, koj, acac, dhp, and mim, favored by the hydrolysis, interact with Ub, and adducts with composition n[VOL]-Ub ( n = 1-2) are observed with the contemporaneous coordination of (Glu18, Asp21) or (Glu16, Glu18), and (Glu24, Asp52) or (Glu51, Asp52) donors. The results of this work suggest that the combined application of spectroscopic, spectrometric, and computational techniques allow the complete characterization of the ternary systems formed by a V compound and a model protein such as ubiquitin. The same approach can be applied, eventually changing the spectroscopic/spectrometric techniques, to study the interaction of other metal species with other proteins.
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Affiliation(s)
- Valeria Ugone
- Dipartimento di Chimica e Farmacia , Università di Sassari , Via Vienna 2 , I-07100 Sassari , Italy
| | - Daniele Sanna
- Istituto di Chimica Biomolecolare , Consiglio Nazionale delle Ricerche , Trav. La Crucca 3 , I-07040 Sassari , Italy
| | - Giuseppe Sciortino
- Dipartimento di Chimica e Farmacia , Università di Sassari , Via Vienna 2 , I-07100 Sassari , Italy.,Departament de Química , Universitat Autònoma de Barcelona , 08193 Cerdanyola del Vallés , Barcelona , Spain
| | - Jean-Didier Maréchal
- Departament de Química , Universitat Autònoma de Barcelona , 08193 Cerdanyola del Vallés , Barcelona , Spain
| | - Eugenio Garribba
- Dipartimento di Chimica e Farmacia , Università di Sassari , Via Vienna 2 , I-07100 Sassari , Italy
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20
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Sciortino G, Sanna D, Ugone V, Maréchal JD, Garribba E. Integrated ESI-MS/EPR/computational characterization of the binding of metal species to proteins: vanadium drug–myoglobin application. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00179d] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An integrated strategy based on ESI-MS spectrometry, EPR spectroscopy and docking/QM computational methods is applied to the systems formed by VIVO2+ ions and four potential VIVOL2 drugs and myoglobin. This approach is generizable to other metals and proteins.
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Affiliation(s)
- Giuseppe Sciortino
- Dipartimento di Chimica e Farmacia
- Università di Sassari
- I-07100 Sassari
- Italy
- Departament de Química
| | - Daniele Sanna
- Istituto CNR di Chimica Biomolecolare
- I-07040 Sassari
- Italy
| | - Valeria Ugone
- Dipartimento di Chimica e Farmacia
- Università di Sassari
- I-07100 Sassari
- Italy
| | | | - Eugenio Garribba
- Dipartimento di Chimica e Farmacia
- Università di Sassari
- I-07100 Sassari
- Italy
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21
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Kalniņa D, Levina A, Pei A, Gross KA, Lay PA. Synthesis, characterization and in vitro anti-cancer activity of vanadium-doped nanocrystalline hydroxyapatite. NEW J CHEM 2019. [DOI: 10.1039/c9nj03406d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanocrystalline V(v)-doped hydroxyapatite and its reduced analogue (V(v) and V(iv) mixture) show promising in vitro cytotoxicity against cultured human bone cancer cells.
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Affiliation(s)
- Daina Kalniņa
- Faculty of Materials Science and Applied Chemistry
- Riga Technical University
- Riga LV1658
- Latvia
- School of Chemistry
| | - Aviva Levina
- School of Chemistry
- University of Sydney
- Sydney
- Australia
| | - Alexander Pei
- School of Chemistry
- University of Sydney
- Sydney
- Australia
- Exchange Student from Boston University
| | - Kārlis Agris Gross
- Faculty of Materials Science and Applied Chemistry
- Riga Technical University
- Riga LV1658
- Latvia
| | - Peter A. Lay
- School of Chemistry
- University of Sydney
- Sydney
- Australia
- Sydney Analytical
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22
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Porcaro F, Roudeau S, Carmona A, Ortega R. Advances in element speciation analysis of biomedical samples using synchrotron-based techniques. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2017.09.016] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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23
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Levina A, Crans DC, Lay PA. Speciation of metal drugs, supplements and toxins in media and bodily fluids controls in vitro activities. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.01.002] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
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24
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25
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Electronic State of Sodium trans-[Tetrachloridobis(1H-indazole)ruthenate(III)] (NKP-1339) in Tumor, Liver and Kidney Tissue of a SW480-bearing Mouse. Sci Rep 2017; 7:40966. [PMID: 28112202 PMCID: PMC5256101 DOI: 10.1038/srep40966] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 12/13/2016] [Indexed: 12/19/2022] Open
Abstract
Ruthenium complexes are promising candidates for anticancer agents, especially NKP-1339 (sodium trans-[tetrachloridobis(1H-indazole)ruthenate(III)]), which is on the edge to clinical applications. The anticancer mechanism seems to be tightly linked to the redox chemistry but despite progress in human clinical trials the in vivo Ru oxidation state and the coordination of Ru remains unclear. The Ru-based anticancer drug NKP-1339 was studied applying XANES (Cl K- and Ru L2,3-edges) in tumor, kidney and liver tissue of a SW480 bearing mouse. Based on coordination charge and 3D XANES plots containing a series of model compounds as well as pre-edge analysis of the ligand Cl K-edge it is suggested that NKP-1339 remains in its +III oxidation state after 24 hours and at least one of the four chlorido ligands remain covalently bound to the Ru ion showing a biotransformation from RuIIIN2Cl4 to RuIIIClx(N/O)6−x (X = 1 or 2).
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26
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Doucette KA, Hassell KN, Crans DC. Selective speciation improves efficacy and lowers toxicity of platinum anticancer and vanadium antidiabetic drugs. J Inorg Biochem 2016; 165:56-70. [PMID: 27751591 DOI: 10.1016/j.jinorgbio.2016.09.013] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 09/22/2016] [Accepted: 09/29/2016] [Indexed: 12/14/2022]
Abstract
Improving efficacy and lowering resistance to metal-based drugs can be addressed by consideration of the coordination complex speciation and key reactions important to vanadium antidiabetic drugs or platinum anticancer drugs under biological conditions. The methods of analyses vary depending on the specific metal ion chemistry. The vanadium compounds interconvert readily, whereas the reactions of the platinum compounds are much slower and thus much easier to study. However, the vanadium species are readily differentiated due to vanadium complexes differing in color. For both vanadium and platinum systems, understanding the processes as the compounds, Lipoplatin and Satraplatin, enter cells is needed to better combat the disease; there are many cellular metabolites, which may affect processing and thus the efficacy of the drugs. Examples of two formulations of platinum compounds illustrate how changing the chemistry of the platinum will result in less toxic and better tolerated drugs. The consequence of the much lower toxicity of the drug, can be readily realized because cisplatin administration requires hospital stay whereas Lipoplatin can be done in an outpatient manner. Similarly, the properties of Satraplatin allow for development of an oral drug. These forms of platinum demonstrate that the direct consequence of more selective speciation is lower side effects and cheaper administration of the anticancer agent. Therefore we urge that as the community goes forward in development of new drugs, control of speciation chemistry will be considered as one of the key strategies in the future development of anticancer drugs.
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Affiliation(s)
- Kaitlin A Doucette
- Cell and Molecular Biology Program, Colorado State University, Fort Collins, CO 80523, USA
| | - Kelly N Hassell
- Cell and Molecular Biology Program, Colorado State University, Fort Collins, CO 80523, USA
| | - Debbie C Crans
- Cell and Molecular Biology Program, Colorado State University, Fort Collins, CO 80523, USA; Dept. Chemistry, Colorado State University, Fort Collins, CO 80523, USA.
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Barman S, Maity N, Bhatte K, Ould-Chikh S, Dachwald O, Haeßner C, Saih Y, Abou-Hamad E, Llorens I, Hazemann JL, Köhler K, D’ Elia V, Basset JM. Single-Site VOx Moieties Generated on Silica by Surface Organometallic Chemistry: A Way To Enhance the Catalytic Activity in the Oxidative Dehydrogenation of Propane. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01263] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Samir Barman
- KAUST
Catalysis Center (KCC), King Abdullah University of Science and Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Niladri Maity
- KAUST
Catalysis Center (KCC), King Abdullah University of Science and Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Kushal Bhatte
- KAUST
Catalysis Center (KCC), King Abdullah University of Science and Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Samy Ould-Chikh
- KAUST
Catalysis Center (KCC), King Abdullah University of Science and Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Oliver Dachwald
- Departments
of Chemistry and Inorganic Chemistry, Technical University of Munich, Lichtenbergstrasse 4, 85747 Garching, Germany
| | - Carmen Haeßner
- Departments
of Chemistry and Inorganic Chemistry, Technical University of Munich, Lichtenbergstrasse 4, 85747 Garching, Germany
- Catalysis
Research Center, Technical University of Munich, Ernst-Otto-Fischer-Strasse
1, 85747 Garching, Germany
| | - Youssef Saih
- KAUST
Catalysis Center (KCC), King Abdullah University of Science and Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Edy Abou-Hamad
- KAUST
Catalysis Center (KCC), King Abdullah University of Science and Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Isabelle Llorens
- Institut de Recherches
sur la Catalyse et l’Environnement de Lyon IRCELYON, UMR 5256,
CNRS − Université Lyon 1, 2 Avenue Albert Einstein, 69626 CEDEX Villeurbanne, France
| | - Jean-Louis Hazemann
- Institut Neel, CNRS, 25 Avenue des Martyrs, F-38042 CEDEX 9 Grenoble, France
| | - Klaus Köhler
- Departments
of Chemistry and Inorganic Chemistry, Technical University of Munich, Lichtenbergstrasse 4, 85747 Garching, Germany
- Catalysis
Research Center, Technical University of Munich, Ernst-Otto-Fischer-Strasse
1, 85747 Garching, Germany
| | - Valerio D’ Elia
- KAUST
Catalysis Center (KCC), King Abdullah University of Science and Technology, 23955-6900 Thuwal, Saudi Arabia
- Department
of Materials Science and Engineering, School of Molecular Science
and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), 21210 Wangchan, Rayong, Thailand
| | - Jean-Marie Basset
- KAUST
Catalysis Center (KCC), King Abdullah University of Science and Technology, 23955-6900 Thuwal, Saudi Arabia
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28
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51V NMR investigation of cell-associated vanadate species in Phycomyces blakesleeanus mycelium. Res Microbiol 2016; 167:521-8. [DOI: 10.1016/j.resmic.2016.04.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 04/27/2016] [Accepted: 04/28/2016] [Indexed: 01/18/2023]
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29
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Best SP, Levina A, Glover C, Johannessen B, Kappen P, Lay PA. XAS spectroelectrochemistry: reliable measurement of X-ray absorption spectra from redox manipulated solutions at room temperature. JOURNAL OF SYNCHROTRON RADIATION 2016; 23:743-750. [PMID: 27140154 DOI: 10.1107/s1600577516005464] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 04/01/2016] [Indexed: 06/05/2023]
Abstract
The design and operation of a low-volume spectroelectrochemical cell for X-ray absorption spectroscopy (XAS) of solutions at room temperature is described. Fluorescence XAS measurements are obtained from samples contained in the void space of a 50 µL reticulated vitreous carbon (sponge) working electrode. Both rapid electrosynthesis and control of the effects of photoreduction are achieved by control over the flow properties of the solution through the working electrode, where a good balance between the rate of consumption of sample and the minimization of decomposition was obtained by pulsing the flow of the solution by 1-2 µL with duty cycle of ∼3 s while maintaining a small net flow rate (26-100 µL h(-1)). The performance of the cell in terms of control of the redox state of the sample and minimization of the effects of photoreduction was demonstrated by XAS measurements of aqueous solutions of the photosensitive Fe(III) species, [Fe(C2O4)3](3-), together with that of the electrogenerated [Fe(C2O4)3](4-) product. The current response from the cell during the collection of XAS spectra provides an independent measure of the stability of the sample of the measurement. The suitability of the approach for the study of small volumes of mM concentrations of protein samples was demonstrated by the measurement of the oxidized and electrochemically reduced forms of cytochrome c.
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Affiliation(s)
- Stephen P Best
- School of Chemistry, University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia
| | - Aviva Levina
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Chris Glover
- Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Bernt Johannessen
- Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Peter Kappen
- Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Peter A Lay
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
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30
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Žižić M, Dučić T, Grolimund D, Bajuk-Bogdanović D, Nikolic M, Stanić M, Križak S, Zakrzewska J. X-ray absorption near-edge structure micro-spectroscopy study of vanadium speciation in Phycomyces blakesleeanus mycelium. Anal Bioanal Chem 2015; 407:7487-96. [DOI: 10.1007/s00216-015-8916-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 07/08/2015] [Accepted: 07/13/2015] [Indexed: 10/24/2022]
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31
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Levina A, McLeod AI, Gasparini SJ, Nguyen A, De Silva WGM, Aitken JB, Harris HH, Glover C, Johannessen B, Lay PA. Reactivity and Speciation of Anti-Diabetic Vanadium Complexes in Whole Blood and Its Components: The Important Role of Red Blood Cells. Inorg Chem 2015; 54:7753-66. [PMID: 26230577 DOI: 10.1021/acs.inorgchem.5b00665] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Reactions with blood components are crucial for controlling the antidiabetic, anticancer, and other biological activities of V(V) and V(IV) complexes. Despite extensive studies of V(V) and V(IV) reactions with the major blood proteins (albumin and transferrin), reactions with whole blood and red blood cells (RBC) have been studied rarely. A detailed speciation study of Na3[V(V)O4] (A), K4[V(IV)2O2(citr)2]·6H2O (B; citr = citrato(4-)); [V(IV)O(ma)2] (C; ma = maltolato(-)), and (NH4)[V(V)(O)2(dipic)] (D; dipic = pyridine-2,6-dicarboxylato(2-)) in whole rat blood, freshly isolated rat plasma, and commercial bovine serum using X-ray absorption near-edge structure (XANES) spectroscopy is reported. The latter two compounds are potential oral antidiabetic drugs, and the former two are likely to represent their typical decomposition products in gastrointestinal media. XANES spectral speciation was performed by principal component analysis and multiple linear regression techniques, and the distribution of V between RBC and plasma fractions was measured by electrothermal atomic absorption spectroscopy. Reactions of A, C, or D with whole blood (1.0 mM V, 1-6 h at 310 K) led to accumulation of ∼50% of total V in the RBC fraction (∼10% in the case of B), which indicated that RBC act as V carriers to peripheral organs. The spectra of V products in RBC were independent of the initial V complex, and were best fitted by a combination of V(IV)-carbohydrate (2-hydroxyacid moieties) and/or citrate (65-85%) and V(V)-protein (15-35%) models. The presence of RBC created a more reducing environment in the plasma fraction of whole blood compared with those in isolated plasma or serum, as shown by the differences in distribution of V(IV) and V(V) species in the reaction products of A-D in these media. At physiologically relevant V concentrations (<50 μM), this role of RBC may promote the formation of V(III)-transferrin as a major V carrier in the blood plasma. The results reported herein have broad implications for the roles of RBC in the transport and speciation of metal pro-drugs that have broad applications across medicine.
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Affiliation(s)
- Aviva Levina
- †School of Chemistry, The University of Sydney, Sydney NSW 2006, Australia
| | - Andrew I McLeod
- †School of Chemistry, The University of Sydney, Sydney NSW 2006, Australia
| | - Sylvia J Gasparini
- †School of Chemistry, The University of Sydney, Sydney NSW 2006, Australia
| | - Annie Nguyen
- †School of Chemistry, The University of Sydney, Sydney NSW 2006, Australia
| | | | - Jade B Aitken
- †School of Chemistry, The University of Sydney, Sydney NSW 2006, Australia.,‡Australian Synchrotron, 800 Blackburn Rd., Clayton VIC 3168, Australia
| | - Hugh H Harris
- †School of Chemistry, The University of Sydney, Sydney NSW 2006, Australia
| | - Chris Glover
- ‡Australian Synchrotron, 800 Blackburn Rd., Clayton VIC 3168, Australia
| | - Bernt Johannessen
- ‡Australian Synchrotron, 800 Blackburn Rd., Clayton VIC 3168, Australia
| | - Peter A Lay
- †School of Chemistry, The University of Sydney, Sydney NSW 2006, Australia
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32
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Levina A, McLeod AI, Pulte A, Aitken JB, Lay PA. Biotransformations of Antidiabetic Vanadium Prodrugs in Mammalian Cells and Cell Culture Media: A XANES Spectroscopic Study. Inorg Chem 2015; 54:6707-18. [PMID: 25906315 PMCID: PMC4511291 DOI: 10.1021/ic5028948] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
![]()
The antidiabetic activities of vanadium(V)
and -(IV) prodrugs are determined by their ability to release active
species upon interactions with components of biological media. The
first X-ray absorption spectroscopic study of the reactivity of typical
vanadium (V) antidiabetics, vanadate ([VVO4]3–, A) and a vanadium(IV) bis(maltolato)
complex (B), with mammalian cell cultures has been performed
using HepG2 (human hepatoma), A549 (human lung carcinoma), and 3T3-L1
(mouse adipocytes and preadipocytes) cell lines, as well as the corresponding
cell culture media. X-ray absorption near-edge structure data were
analyzed using empirical correlations with a library of model vanadium(V),
-(IV), and -(III) complexes. Both A and B ([V] = 1.0 mM) gradually converged into similar mixtures of predominantly
five- and six-coordinate VV species (∼75% total
V) in a cell culture medium within 24 h at 310 K. Speciation of V
in intact HepG2 cells also changed with the incubation time (from
∼20% to ∼70% VIV of total V), but it was
largely independent of the prodrug used (A or B) or of the predominant V oxidation state in the medium. Subcellular
fractionation of A549 cells suggested that VV reduction
to VIV occurred predominantly in the cytoplasm, while accumulation
of VV in the nucleus was likely to have been facilitated
by noncovalent bonding to histone proteins. The nuclear VV is likely to modulate the transcription process and to be ultimately
related to cell death at high concentrations of V, which may be important
in anticancer activities. Mature 3T3-L1 adipocytes (unlike for preadipocytes)
showed a higher propensity to form VIV species, despite
the prevalence of VV in the medium. The distinct V biochemistry
in these cells is consistent with their crucial role in insulin-dependent
glucose and fat metabolism and may also point to an endogenous role
of V in adipocytes. The first detailed
speciation study of typical antidiabetic vanadium(V/IV) complexes
in mammalian cell culture systems showed that the complexes decomposed
rapidly in cell culture media and were further metabolized by the
cells, which included interconversions of VV and VIV species.
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Affiliation(s)
- Aviva Levina
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Andrew I McLeod
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Anna Pulte
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Jade B Aitken
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Peter A Lay
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
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33
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Kremer LE, McLeod AI, Aitken JB, Levina A, Lay PA. Vanadium(V) and -(IV) complexes of anionic polysaccharides: Controlled release pharmaceutical formulations and models of vanadium biotransformation products. J Inorg Biochem 2015; 147:227-34. [PMID: 25958254 DOI: 10.1016/j.jinorgbio.2015.03.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Revised: 03/20/2015] [Accepted: 03/28/2015] [Indexed: 02/01/2023]
Abstract
Uncontrolled reactions in biological media are a main obstacle for clinical translation of V-based anti-diabetic or anti-cancer pro-drugs. We investigated the use of controlled-release pharmaceutical formulations to ameliorate this issue with a series of V(V) and (IV) complexes of anionic polysaccharides. Carboxymethyl cellulose, xanthan gum, or alginic acid formulations were prepared by the reactions of [VO4](3-) with one or two molar equivalents of biological reductants, L-ascorbic acid (AA) or L-cysteine (Cys), in the presence of excess polysaccharide at pH~7 or pH~4. XANES studies with the use of a previously developed library of model V(V), V(IV) and V(III) complexes showed that reactions in the presence of AA led mostly to the mixtures of five- and six-coordinate V(IV) species, while the reactions in the presence of Cys led predominantly to the mixtures of five- and six-coordinate V(V) species. The XANES spectra of some of these samples closely matched those reported previously for [VO4](3-) biotransformation products in isolated blood plasma, red blood cells, or cultured adipocytes, which supports the hypothesis that modified polysaccharides are major binders of V(V) and V(IV) in biological systems. Studies by EPR spectroscopy suggested predominant V(IV)-carboxylato binding in complexes with polysaccharides. One of the isolated products (a V(IV)-alginato complex) showed selective release of low-molecular-mass V species at pH~8, but not at pH~2, which makes it a promising lead for the development of V-containing formulations for oral administration that are stable in the stomach, but release the active ingredient in the intestines.
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Affiliation(s)
- Lauren E Kremer
- School of Chemistry The University of Sydney, Sydney, NSW 2006, Australia
| | - Andrew I McLeod
- School of Chemistry The University of Sydney, Sydney, NSW 2006, Australia
| | - Jade B Aitken
- School of Chemistry The University of Sydney, Sydney, NSW 2006, Australia
| | - Aviva Levina
- School of Chemistry The University of Sydney, Sydney, NSW 2006, Australia
| | - Peter A Lay
- School of Chemistry The University of Sydney, Sydney, NSW 2006, Australia.
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34
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Levina A, McLeod AI, Kremer LE, Aitken JB, Glover CJ, Johannessen B, Lay PA. Reactivity-activity relationships of oral anti-diabetic vanadium complexes in gastrointestinal media: an X-ray absorption spectroscopic study. Metallomics 2014; 6:1880-8. [PMID: 25100248 DOI: 10.1039/c4mt00146j] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The reactions of oral V(V/IV) anti-diabetic drugs within the gastrointestinal environment (particularly in the presence of food) are a crucial factor that affects their biological activities, but to date these have been poorly understood. In order to build up reactivity-activity relationships, the first detailed study of the reactivities of typical V-based anti-diabetics, Na3V(V)O4 (A), [V(IV)O(OH2)5](SO4) (B), [V(IV)O(ma)2] (C, ma = maltolato(-)) and (NH4)[V(V)(O)2(dipic)] (D, dipic = pyridine-2,5-dicarboxylato(2-)) with simulated gastrointestinal (GI) media in the presence or absence of food components has been performed by the use of XANES (X-ray absorption near edge structure) spectroscopy. Changes in speciation under conditions that simulate interactions in the GI tract have been discerned using correlations of XANES parameters that were based on a library of model V(V), V(IV), and V(III) complexes for preliminary assessment of the oxidation states and coordination numbers. More detailed speciation analyses were performed using multiple linear regression fits of XANES from the model complexes to XANES obtained from the reaction products from interactions with the GI media. Compounds B and D were relatively stable in the gastric environment (pH ∼ 2) in the absence of food, while C was mostly dissociated, and A was converted to [V10O28](6-). Sequential gastric and intestinal digestion in the absence of food converted A, B and D to poorly absorbed tetrahedral vanadates, while C formed five- or six-coordinate V(V) species where the maltolato ligands were likely to be partially retained. XANES obtained from gastric digestion of A-D in the presence of typical food components converged to that of a mixture of V(IV)-aqua, V(IV)-amino acid and V(III)-aqua complexes. Subsequent intestinal digestion led predominantly to V(IV) complexes that were assigned as citrato or complexes with 2-hydroxyacidato donor groups from other organic compounds, including certain carbohydrates. The absence of strong reductants (such as ascorbate) in the food increased the V(V) component in gastrointestinal digestion products. These results can be used to predict the oral bioavailability of various types of V(V/IV) anti-diabetics, and the effects of taking such drugs with food.
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Affiliation(s)
- Aviva Levina
- School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia.
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