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Nucera A, Macchia ML, Baranyai Z, Carniato F, Tei L, Ravera M, Botta M. Comprehensive Investigation of [Fe(EDTA)] --Functionalized Derivatives and their Supramolecular Adducts with Human Serum Albumin. Inorg Chem 2024. [PMID: 38949627 DOI: 10.1021/acs.inorgchem.4c01715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
In recent years, the coordination chemistry of high-spin Fe(III) complexes has increasingly attracted interest due to their potential as effective alternatives to Gd(III)-based MRI contrast agents. This paper discusses the results from our study on Fe(III) complexes with two EDTA derivatives, each modified with either one (EDTA-BOM) or two (EDTA-BOM2) benzyloxymethylene (BOM) groups on the acetic arm(s). These pendant hydrophobic groups enable the complexes to form noncovalent adducts with human serum albumin (HSA), leading to an observed increase in relaxivity due to the reduction in molecular tumbling. Our research involved detailed relaxometric measurements and analyses of both 1H and 17O NMR data at varying temperatures and magnetic field strengths, which is conducted with and without the presence of a protein. A significant finding of this study is the effect of electronic relaxation time on the effectiveness of [Fe(EDTA-BOM)(H2O)]- and [Fe(EDTA-BOM2)(H2O)]- as diagnostic MRI probes. By integrating these relaxometric results with comprehensive thermodynamic, kinetic, and electrochemical data, we have thoroughly characterized how structural modifications to the EDTA base ligand influence the properties of the complexes.
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Affiliation(s)
- Alessandro Nucera
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel 11, Alessandria 15121, Italy
| | - Maria Ludovica Macchia
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel 11, Alessandria 15121, Italy
| | - Zsolt Baranyai
- Bracco Imaging SpA, CRB Trieste, AREA Science Park, Basovizza, TS 34149, Italy
| | - Fabio Carniato
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel 11, Alessandria 15121, Italy
- Magnetic Resonance Platform (PRISMA-UPO), Università del Piemonte Orientale, Viale Teresa Michel 11, Alessandria 15121, Italy
| | - Lorenzo Tei
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel 11, Alessandria 15121, Italy
| | - Mauro Ravera
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel 11, Alessandria 15121, Italy
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel 11, Alessandria 15121, Italy
- Magnetic Resonance Platform (PRISMA-UPO), Università del Piemonte Orientale, Viale Teresa Michel 11, Alessandria 15121, Italy
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Wingering PMR, Hohnstein S, Krämer F, Dilanas MEA, Ruiz-Martínez C, Fernández I, Breher F. Synthesis, Crystal Structures, and Ion Pairing of κ 6 N Complexes with Rare-Earth Elements in the Solid State and in Solution. Chemistry 2023; 29:e202301529. [PMID: 37294063 DOI: 10.1002/chem.202301529] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 06/09/2023] [Accepted: 06/09/2023] [Indexed: 06/10/2023]
Abstract
The rare earth element complexes (Ln=Y, La, Sm, Lu, Ce) of several podant κ6 N-coordinating ligands have been synthetized and thoroughly characterized. The structural properties of the complexes have been investigated by X-ray diffraction in the solid state and by advanced NMR methods in solution. To estimate the donor capabilities of the presented ligands, an experimental comparison study has been conducted by cyclic voltammetry as well as absorption experiments using the cerium complexes and by analyzing 89 Y NMR chemical shifts of the different yttrium complexes. In order to obtain a complete and detailed picture, all experiments were corroborated by state-of-the-art quantum chemical calculations. Finally, coordination competition studies have been carried out by means of 1 H and 31 P NMR spectroscopy to investigate the correlation with donor properties and selectivity.
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Affiliation(s)
- Perrine M R Wingering
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Silvia Hohnstein
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Felix Krämer
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Melina E A Dilanas
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Cristina Ruiz-Martínez
- Laboratory of Organic Chemistry, University of Almería Carretera de Sacramento s/n, 04120, Almería, Spain
| | - Ignacio Fernández
- Laboratory of Organic Chemistry, University of Almería Carretera de Sacramento s/n, 04120, Almería, Spain
| | - Frank Breher
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
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Zakaria ABM, Huang Y, Coman D, Mishra SK, Mihailovic JM, Maritim S, Rojas-Quijano FA, Jurek P, Kiefer GE, Hyder F. Methylated tetra-amide derivatives of paramagnetic complexes for magnetic resonance biosensing with both BIRDS and CEST. NMR IN BIOMEDICINE 2022; 35:e4687. [PMID: 34970801 DOI: 10.1002/nbm.4687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 12/22/2021] [Accepted: 12/25/2021] [Indexed: 06/14/2023]
Abstract
Paramagnetic agents that utilize two mechanisms to provide physiological information by magnetic resonance imaging (MRI) and magnetic resonance spectroscopic imaging (MRSI) are described. MRI with chemical exchange saturation transfer (CEST) takes advantage of the agent's exchangeable protons (e.g., -OH or -NHx , where 2 ≥ x ≥ 1) to create pH contrast. The agent's incorporation of non-exchangeable protons (e.g., -CHy , where 3 ≥ y ≥ 1) makes it possible to map tissue temperature and/or pH using an MRSI method called biosensor imaging of redundant deviation in shifts (BIRDS). Hybrid probes based upon 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetate chelate (DOTA4- ) and its methylated analog (1,4,7,10-tetraazacyclododecane-α, α', α″, α‴-tetramethyl-1,4,7,10-tetraacetate, DOTMA4- ) were synthesized, and modified to create new tetra-amide chelates. Addition of several methyl groups per pendent arm of the symmetrical chelates, positioned proximally and distally to thulium ions (Tm3+ ), gave rise to favorable BIRDS properties (i.e., high signal-to-noise ratio (SNR) from non-exchangeable methyl proton peaks) and CEST responsiveness (i.e., from amide exchangeable protons). Structures of the Tm3+ probes elucidate the influence of methyl group placement on sensor performance. An eight-coordinate geometry with high symmetry was observed for the complexes: Tm-L1 was based on DOTA4- , whereas Tm-L2 and Tm-L3 were based on DOTMA4- , where the latter contained an additional carboxylate at the distal end of each arm. The distance of Tm3+ from terminal methyl carbons is a key determinant for sustaining BIRDS temperature sensitivity without compromising CEST pH contrast; however, water solubility was influenced by introduction of hydrophobic methyl groups and hydrophilic carboxylate. Combined BIRDS and CEST detection of Tm-L2, which features two high-SNR methyl peaks and a strong amide CEST peak, should enable simultaneous temperature and pH measurements for high-resolution molecular imaging in vivo.
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Affiliation(s)
- Abul B M Zakaria
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, Connecticut, USA
- Magnetic Resonance Research Center, Yale University, New Haven, Connecticut, USA
| | - Yuegao Huang
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, Connecticut, USA
- Magnetic Resonance Research Center, Yale University, New Haven, Connecticut, USA
| | - Daniel Coman
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, Connecticut, USA
- Magnetic Resonance Research Center, Yale University, New Haven, Connecticut, USA
| | - Sandeep K Mishra
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, Connecticut, USA
- Magnetic Resonance Research Center, Yale University, New Haven, Connecticut, USA
| | - Jelena M Mihailovic
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, Connecticut, USA
- Magnetic Resonance Research Center, Yale University, New Haven, Connecticut, USA
| | - Samuel Maritim
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, Connecticut, USA
- Magnetic Resonance Research Center, Yale University, New Haven, Connecticut, USA
| | | | | | | | - Fahmeed Hyder
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, Connecticut, USA
- Magnetic Resonance Research Center, Yale University, New Haven, Connecticut, USA
- Department of Biomedical Engineering, Yale University, New Haven, Connecticut, USA
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Khan MH, Walsh JJ, Mihailović JM, Mishra SK, Coman D, Hyder F. Imaging the transmembrane and transendothelial sodium gradients in gliomas. Sci Rep 2021; 11:6710. [PMID: 33758290 PMCID: PMC7987982 DOI: 10.1038/s41598-021-85925-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 03/08/2021] [Indexed: 11/29/2022] Open
Abstract
Under normal conditions, high sodium (Na+) in extracellular (Na+e) and blood (Na+b) compartments and low Na+ in intracellular milieu (Na+i) produce strong transmembrane (ΔNa+mem) and weak transendothelial (ΔNa+end) gradients respectively, and these manifest the cell membrane potential (Vm) as well as blood–brain barrier (BBB) integrity. We developed a sodium (23Na) magnetic resonance spectroscopic imaging (MRSI) method using an intravenously-administered paramagnetic polyanionic agent to measure ΔNa+mem and ΔNa+end. In vitro 23Na-MRSI established that the 23Na signal is intensely shifted by the agent compared to other biological factors (e.g., pH and temperature). In vivo 23Na-MRSI showed Na+i remained unshifted and Na+b was more shifted than Na+e, and these together revealed weakened ΔNa+mem and enhanced ΔNa+end in rat gliomas (vs. normal tissue). Compared to normal tissue, RG2 and U87 tumors maintained weakened ΔNa+mem (i.e., depolarized Vm) implying an aggressive state for proliferation, whereas RG2 tumors displayed elevated ∆Na+end suggesting altered BBB integrity. We anticipate that 23Na-MRSI will allow biomedical explorations of perturbed Na+ homeostasis in vivo.
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Affiliation(s)
- Muhammad H Khan
- Department of Biomedical Engineering, Yale University, N143 TAC (MRRC), 300 Cedar Street, New Haven, CT, 06520, USA.
| | - John J Walsh
- Department of Biomedical Engineering, Yale University, N143 TAC (MRRC), 300 Cedar Street, New Haven, CT, 06520, USA
| | - Jelena M Mihailović
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, 06520, USA
| | - Sandeep K Mishra
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, 06520, USA
| | - Daniel Coman
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, 06520, USA
| | - Fahmeed Hyder
- Department of Biomedical Engineering, Yale University, N143 TAC (MRRC), 300 Cedar Street, New Haven, CT, 06520, USA. .,Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, 06520, USA.
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Stability evaluation of Gd chelates for macromolecular MRI contrast agents. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2019; 33:527-536. [PMID: 31823277 DOI: 10.1007/s10334-019-00805-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 11/06/2019] [Accepted: 11/18/2019] [Indexed: 01/20/2023]
Abstract
OBJECTIVE We try to establish designs for the macromolecular agents possessing high Gd3+-chelating stability, because free Gd3+ ion released from Gd chelates is known as a risk factor to cause toxic side effects and a safety concern. MATERIALS AND METHODS We prepared three types of Gd-based macromolecular MRI contrast agents from a synthetic polymer (poly(glutamic acid) homopolymer or poly(ethylene glycol)-b-poly(lysine) block copolymer) and a chelating moiety (DO3A or DOTA) having two strategic designs for high chelate stability. Then, we examine the in vitro Gd3+-chelate stability of these macromolecular MRI contrast agents. RESULTS The prepared macromolecular agents exhibited the same or higher Gd3+-chelate stability as/than did Gd-DOTA that possesses the highest Gd3+-chelate stability among the approved small-MW Gd-chelate MRI contrast agent. DISCUSSION Our macromolecular design was considered to work well for high Gd3+-chelate stability.
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Ko CN, Li G, Leung CH, Ma DL. Dual function luminescent transition metal complexes for cancer theranostics: The combination of diagnosis and therapy. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2018.11.013] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Castro G, Regueiro-Figueroa M, Esteban-Gómez D, Bastida R, Macías A, Pérez-Lourido P, Platas-Iglesias C, Valencia L. Exceptionally Inert Lanthanide(III) PARACEST MRI Contrast Agents Based on an 18-Membered Macrocyclic Platform. Chemistry 2015; 21:18662-70. [DOI: 10.1002/chem.201502937] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Indexed: 11/10/2022]
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Qin C, Kong DY, Wang J. Synthesis and structural determination of mononuclear nine-coordinate (EnH2)[YbIII(Egta)(H2O)]2 · 6H2O and [YbIII(Eg3a)(H2O)2] · 6H2O. RUSS J COORD CHEM+ 2015. [DOI: 10.1134/s1070328415040041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Kálmán FK, Végh A, Regueiro-Figueroa M, Tóth É, Platas-Iglesias C, Tircsó G. H4octapa: highly stable complexation of lanthanide(III) ions and copper(II). Inorg Chem 2015; 54:2345-56. [PMID: 25692564 DOI: 10.1021/ic502966m] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The acyclic ligand octapa(4-) (H4octapa = 6,6'-((ethane-1,2-diylbis((carboxymethyl)azanediyl))bis(methylene))dipicolinic acid) forms stable complexes with the Ln(3+) ions in aqueous solution. The stability constants determined for the complexes with La(3+), Gd(3+), and Lu(3+) using relaxometric methods are log KLaL = 20.13(7), log KGdL = 20.23(4), and log KLuL = 20.49(5) (I = 0.15 M NaCl). High stability constants were also determined for the complexes formed with divalent metal ions such as Zn(2+) and Cu(2+) (log KZnL = 18.91(3) and log KCuL = 22.08(2)). UV-visible and NMR spectroscopic studies and density functional theory (DFT) calculations point to hexadentate binding of the ligand to Zn(2+) and Cu(2+), the donor atoms of the acetate groups of the ligand remaining uncoordinated. The complexes formed with the Ln(3+) ions are nine-coordinated thanks to the octadentate binding of the ligand and the presence of a coordinated water molecule. The stability constants of the complexes formed with the Ln(3+) ions do not change significantly across the lanthanide series. A DFT investigation shows that this is the result of a subtle balance between the increased binding energies across the 4f period, which contribute to an increasing complex stability, and the parallel increase of the absolute values of the hydration free energies of the Ln(3+) ions. In the case of the [Ln(octapa)(H2O)](-) complexes the interaction between the amine nitrogen atoms of the ligand and the Ln(3+) ions is weakened along the lanthanide series, and therefore the increased electrostatic interaction does not overcome the increasing hydration energies. A detailed kinetic study of the dissociation of the [Gd(octapa)(H2O)](-) complex in the presence of Cu(2+) shows that the metal-assisted pathway is the main responsible for complex dissociation at pH 7.4 and physiological [Cu(2+)] concentration (1 μM).
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Affiliation(s)
- Ferenc Krisztián Kálmán
- Department of Inorganic and Analytical Chemistry, University of Debrecen , Egyetem tér 1, H-4010 Debrecen, Hungary
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Sana B, Lim S. Determining the relaxivity values of protein cage-templated nanoparticles using magnetic resonance imaging. Methods Mol Biol 2014; 1252:39-50. [PMID: 25358771 DOI: 10.1007/978-1-4939-2131-7_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
The application of magnetic resonance imaging (MRI) is often limited by low magnetic relaxivity of currently used contrast agents. This problem can be addressed by developing more sensitive contrast agents by synthesizing new types of metal complex or metallic nanoparticles. Protein cage has been used as a template in biological synthesis of magnetic nanoparticles. The magnetic nanoparticle-protein cage composites have been reported to have high magnetic relaxivity, which implies their potential application as an MRI contrast agent. The magnetic relaxivity is determined by measuring longitudinal and transverse magnetic relaxivities of the potential agent. The commonly performed techniques are field-cycling NMR relaxometry (also known as variable field relaxometry or nuclear magnetic relaxation dispersion (NMRD) profiling) and in vitro or in vivo MRI relaxometry. Here, we describe techniques for the synthesis of nanoparticle-protein cage composite and determination of their magnetic relaxivities by in vitro MR image acquisition and data processing. In this method, longitudinal and transverse relaxivities are calculated by measuring relaxation rates of water hydrogen nuclei at different nanoparticle-protein cage composite concentrations.
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Affiliation(s)
- Barindra Sana
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Dr., Block N1.3, Singapore, 637457, Singapore
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11
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Ma CC, Li Y, Wang J, Kong DY, Qin C, Wu Q. Syntheses and structural determination of mononuclear nine-coordinate (MnH)[GdIII(EDTA)(H2O)3] · 4H2O and 2D ladder-like binuclear nine-coordinate (MnH)2[Gd 2 III (H2TTHA)2] · 4H2O. RUSS J COORD CHEM+ 2014. [DOI: 10.1134/s1070328414080065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Hitomi Y, Ekawa T, Kodera M. Water Proton Relaxivity, Superoxide Dismutase-like Activity, and Cytotoxicity of a Manganese(III) Porphyrin Having Four Poly(ethylene glycol) Tails. CHEM LETT 2014. [DOI: 10.1246/cl.140029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Yutaka Hitomi
- Department of Applied Chemistry, Graduate School of Science and Engineering, Doshisha University
| | - Tomoyuki Ekawa
- Department of Applied Chemistry, Graduate School of Science and Engineering, Doshisha University
| | - Masahito Kodera
- Department of Applied Chemistry, Graduate School of Science and Engineering, Doshisha University
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Subhan MA, Choi JH. X-ray structure and spectroscopy of novel trans-[Ni(L)(NO(3))(2)] and [Ni(L)](ClO(4))(2)·2H(2)O complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 123:410-415. [PMID: 24412795 DOI: 10.1016/j.saa.2013.12.069] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Revised: 12/06/2013] [Accepted: 12/11/2013] [Indexed: 06/03/2023]
Abstract
Ni(L)(NO(3))(2) (complex 1) and [Ni(L)](ClO(4))(2)·2H(2)O (complex 2) [L=3,14-diethyl-2,6,13,17-tetraazatricyclo(16.4.0.0(7,12))docosane] have been prepared and structurally characterized by single-crystal X-ray diffraction at 200K. For these constrained macrocycle complexes, nickel(II) exists in a distorted octahedral environment with the four nitrogen atoms of the macrocyclic ligands and two oxygen atoms from nitrate in axial positions in complex 1. The macrocyclic ligand in complex 1 adopts the most stable trans-III conformation. The Ni-N distances in both the complex 1 (2.094(4)-2.051(4)Å) and complex 2 (2.042(8)-1.996(7)Å), are typical but the axial ligands are coordinating, with NiO bond length, 2.198(3)Å for complex 1. The complex 2 adopts square planner geometry around the Ni(II) with four nitrogen atoms from macrocyclic ligand. The crystals are stabilized in a 3-D network by intra and intermolecular hydrogen bonds that are formed among the secondary nitrogen hydrogen atoms and nitrate in 1, and intermolecular hydrogen bonds are formed by perchlorate and NH groups in 2. The electronic absorption, IR and PL spectral properties are also discussed.
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Affiliation(s)
- Md Abdus Subhan
- Department of Chemistry, Shah Jalal University of Science and Technology, Sylhet, Bangladesh; Department of Chemistry, Andong National University, Andong 760-749, Republic of Korea.
| | - Jong-Ha Choi
- Department of Chemistry, Andong National University, Andong 760-749, Republic of Korea.
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14
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Yang X, Song X, Li Y, Liu G, Banerjee SR, Pomper MG, McMahon MT. Salicylic acid and analogues as diaCEST MRI contrast agents with highly shifted exchangeable proton frequencies. Angew Chem Int Ed Engl 2013; 52:8116-9. [PMID: 23794432 PMCID: PMC3819166 DOI: 10.1002/anie.201302764] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Revised: 05/27/2013] [Indexed: 12/27/2022]
Affiliation(s)
- Xing Yang
- The Russell H. Morgan Department of Radiology, The Johns Hopkins University School of Medicine, 991 N. Broadway Baltimore, Maryland 21287 (USA)
| | - Xiaolei Song
- The Russell H. Morgan Department of Radiology, The Johns Hopkins University School of Medicine, 991 N. Broadway Baltimore, Maryland 21287 (USA)
| | - Yuguo Li
- The Russell H. Morgan Department of Radiology, The Johns Hopkins University School of Medicine, 991 N. Broadway Baltimore, Maryland 21287 (USA)
| | - Guanshu Liu
- The Russell H. Morgan Department of Radiology, The Johns Hopkins University School of Medicine, 991 N. Broadway Baltimore, Maryland 21287 (USA); F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, 707 N. Broadway Ave., Baltimore, Maryland 21287 (USA)
| | - Sangeeta Ray Banerjee
- The Russell H. Morgan Department of Radiology, The Johns Hopkins University School of Medicine, 991 N. Broadway Baltimore, Maryland 21287 (USA)
| | - Martin G. Pomper
- The Russell H. Morgan Department of Radiology, The Johns Hopkins University School of Medicine, 991 N. Broadway Baltimore, Maryland 21287 (USA)
| | - Michael T. McMahon
- The Russell H. Morgan Department of Radiology, The Johns Hopkins University School of Medicine, 991 N. Broadway Baltimore, Maryland 21287 (USA); F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, 707 N. Broadway Ave., Baltimore, Maryland 21287 (USA)
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15
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Yang X, Song X, Li Y, Liu G, Ray Banerjee S, Pomper MG, McMahon MT. Salicylic Acid and Analogues as diaCEST MRI Contrast Agents with Highly Shifted Exchangeable Proton Frequencies. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201302764] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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16
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Esteves CV, Lamosa P, Delgado R, Costa J, Désogère P, Rousselin Y, Goze C, Denat F. Remarkable Inertness of Copper(II) Chelates of Cyclen-Based Macrobicycles with Two trans-N-Acetate Arms. Inorg Chem 2013; 52:5138-53. [DOI: 10.1021/ic400015v] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Catarina V. Esteves
- Instituto
de Tecnologia Química e Biológica, Universidade Nova
de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - Pedro Lamosa
- Instituto
de Tecnologia Química e Biológica, Universidade Nova
de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - Rita Delgado
- Instituto
de Tecnologia Química e Biológica, Universidade Nova
de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - Judite Costa
- iMed.UL, Faculdade de Farmácia,
Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Pauline Désogère
- Institut de Chimie Moléculaire
de l’Université de Bourgogne, UMR CNRS 6302, Université
de Bourgogne, 9, Av. Alain Savary, 21078 Dijon, France
| | - Yoann Rousselin
- Institut de Chimie Moléculaire
de l’Université de Bourgogne, UMR CNRS 6302, Université
de Bourgogne, 9, Av. Alain Savary, 21078 Dijon, France
| | - Christine Goze
- Institut de Chimie Moléculaire
de l’Université de Bourgogne, UMR CNRS 6302, Université
de Bourgogne, 9, Av. Alain Savary, 21078 Dijon, France
| | - Franck Denat
- Institut de Chimie Moléculaire
de l’Université de Bourgogne, UMR CNRS 6302, Université
de Bourgogne, 9, Av. Alain Savary, 21078 Dijon, France
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Rolla GA, Platas-Iglesias C, Botta M, Tei L, Helm L. 1H and 17O NMR relaxometric and computational study on macrocyclic Mn(II) complexes. Inorg Chem 2013; 52:3268-79. [PMID: 23437979 DOI: 10.1021/ic302785m] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Herein we report a detailed 1H and 17O relaxometric investigation of Mn(II) complexes with cyclen-based ligands such as 2-(1,4,7,10-tetraazacyclododecan-1-yl)acetic acid (DO1A), 2,2'-(1,4,7,10-tetraazacyclododecane-1,4-diyl)diacetic acid (1,4-DO2A), 2,2'-(1,4,7,10-tetraazacyclododecane-1,7-diyl)diacetic acid (1,7-DO2A), and 2,2',2"-(1,4,7,10-tetraazacyclododecane-1,4,7-triyl)triacetic acid (DO3A). The Mn(II) complex with the heptadentate ligand DO3A does not have inner sphere water molecules (q = 0), and therefore, the metal ion is most likely seven-coordinate. The hexadentate DO2A ligand has two isomeric forms: 1,7-DO2A and 1,4-DO2A. The Mn(II) complex with 1,7-DO2A is predominantly six-coordinate (q = 0). In aqueous solutions of [Mn(1,4-DO2A)], a species with one coordinated water molecule (q = 1) prevails largely, whereas a q = 0 form represents only about 10% of the overall population. The Mn(II) complex of the pentadentate ligand DO1A also contains a coordinated water molecule. DFT calculations (B3LYP model) are used to obtain information about the structure of this family of closely related complexes in solution, as well as to determine theoretically the 17O and 1H hyperfine coupling constants responsible for the scalar contribution to 17O and 1H NMR relaxation rates and 17O NMR chemical shifts. These calculations provide 17O A/ħ values of ca. 40 × 10(6) rad s(-1), in good agreement with experimental data. The [Mn(1,4-DO2A)(H2O)] complex is endowed with a relatively fast water exchange rate (k(ex)298 = 11.3 × 10(8) s(-1)) in comparison to the [Mn(EDTA)(H2O)]2- analogue (k(ex)298 = 4.7 × 10(8) s(-1)), but about 5 times lower than that of the [Mn(DO1A)(H2O)]+ complex (k(ex)298 = 60 × 10(8) s(-1)). The water exchange rate measured for the latter complex represents the highest water exchange rate ever measured for a Mn(II) complex.
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Affiliation(s)
- Gabriele A Rolla
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale Amedeo Avogadro, Viale T. Michel 11, 15121, Alessandria, Italy
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Bai Y, Gao JQ, Wang J, Jin XD, Li Y, Wang B, Wu T, Zhang XD. Syntheses, structural determination, and binding studies of mononuclear nine-coordinate (EnH2)1.5[HoIII(Ttha)] · 4.5H2O and two dimensional unlimited network (EnH2)[HoIII(Egta)(H2O)]2 · 6H2O. RUSS J COORD CHEM+ 2012. [DOI: 10.1134/s1070328413010028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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19
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Maggioni D, Fenili F, D’Alfonso L, Donghi D, Panigati M, Zanoni I, Marzi R, Manfredi A, Ferruti P, D’Alfonso G, Ranucci E. Luminescent Rhenium and Ruthenium Complexes of an Amphoteric Poly(amidoamine) Functionalized with 1,10-Phenanthroline. Inorg Chem 2012; 51:12776-88. [DOI: 10.1021/ic301616b] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Daniela Maggioni
- Dipartimento di
Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Fabio Fenili
- Dipartimento di
Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Laura D’Alfonso
- Dipartimento di
Fisica, Università di Milano Bicocca, Piazza della Scienza 3, 20126 Milano, Italy
| | - Daniela Donghi
- Dipartimento di
Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Monica Panigati
- Dipartimento di
Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), via G. Giusti 9, 50121 Firenze, Italy
| | - Ivan Zanoni
- Dipartimento di Biotecnologie
e Bioscienze, Università di Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy
| | - Roberta Marzi
- Dipartimento di Biotecnologie
e Bioscienze, Università di Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy
| | - Amedea Manfredi
- Dipartimento di
Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Paolo Ferruti
- Dipartimento di
Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), via G. Giusti 9, 50121 Firenze, Italy
| | - Giuseppe D’Alfonso
- Dipartimento di
Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), via G. Giusti 9, 50121 Firenze, Italy
| | - Elisabetta Ranucci
- Dipartimento di
Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
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Kretschy D, Koellensperger G, Hann S. Elemental labelling combined with liquid chromatography inductively coupled plasma mass spectrometry for quantification of biomolecules: a review. Anal Chim Acta 2012; 750:98-110. [PMID: 23062431 PMCID: PMC3475989 DOI: 10.1016/j.aca.2012.06.040] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2012] [Revised: 06/23/2012] [Accepted: 06/25/2012] [Indexed: 01/02/2023]
Abstract
This article reviews novel quantification concepts where elemental labelling is combined with flow injection inductively coupled plasma mass spectrometry (FI-ICP-MS) or liquid chromatography inductively coupled plasma mass spectrometry (LC-ICP-MS), and employed for quantification of biomolecules such as proteins, peptides and related molecules in challenging sample matrices. In the first sections an overview on general aspects of biomolecule quantification, as well as of labelling will be presented emphasizing the potential, which lies in such methodological approaches. In this context, ICP-MS as detector provides high sensitivity, selectivity and robustness in biological samples and offers the capability for multiplexing and isotope dilution mass spectrometry (IDMS). Fundamental methodology of elemental labelling will be highlighted and analytical, as well as biomedical applications will be presented. A special focus will lie on established applications underlining benefits and bottlenecks of such approaches for the implementation in real life analysis. Key research made in this field will be summarized and a perspective for future developments including sophisticated and innovative applications will given.
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Affiliation(s)
| | | | - Stephan Hann
- University of Natural Resources and Life Sciences, BOKU Vienna, Department of Chemistry, Division of Analytical Chemistry, Muthgasse 18, A-1190 Vienna, Austria
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Kálmán FK, Tircsó G. Kinetic Inertness of the Mn2+ Complexes Formed with AAZTA and Some Open-Chain EDTA Derivatives. Inorg Chem 2012; 51:10065-7. [DOI: 10.1021/ic300832e] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ferenc K. Kálmán
- Department of Inorganic and Analytical
Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, P.O.
Box 21, Debrecen H-4010, Hungary
| | - Gyula Tircsó
- Department of Inorganic and Analytical
Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, P.O.
Box 21, Debrecen H-4010, Hungary
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22
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Choi JH, Subhan MA, Ng SW. Syntheses, crystal structures, and spectroscopic properties of copper(II) complexes with 3,14-diethyl-2,6,13,17-tetraazatricyclo(16.4.0.07,12)docosane. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.719080] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Jong-Ha Choi
- a Department of Chemistry , Andong National University , Andong 760-749 , South Korea
| | - Md Abdus Subhan
- b Department of Chemistry , Shah Jalal University of Science and Technology , Sylhet , Bangladesh
| | - Seik Weng Ng
- c Department of Chemistry , University of Malaya , 50603 Kuala Lumpur , Malaysia
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Iki N, Hiro-oka S, Nakamura M, Tanaka T, Hoshino H. Kinetically Stable LnIII Complexes Comprising a Trinuclear Core Sandwiched between Two Thiacalix[4]arene Ligands Self-Assembled in Water (LnIII = NdIII, YbIII). Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200464] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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James Ratnakar S, Arockia Samy N, Alexander V. A new potential contrast agent for magnetic resonance imaging: Synthesis and relaxivity studies of a gadolinium(III) complex of glucose-6-phosphate conjugated 1,4,7,10-tetraazacyclododecane-1,4,7-triacetic acid. Polyhedron 2012. [DOI: 10.1016/j.poly.2012.02.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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25
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Lima LMP, Delgado R, Hermann P, Ševčík R, Lubal P, Carvalho HF, Martins AF, Tóth É, Geraldes CFGC. Tris(phosphonomethyl)cyclen Derivatives: Thermodynamic Stability, Kinetics, Solution Structure, and Relaxivity of Ln3+ Complexes. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201101335] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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27
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Drahoš B, Lukeš I, Tóth É. Manganese(II) Complexes as Potential Contrast Agents for MRI. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201101336] [Citation(s) in RCA: 135] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Feldmann V, Engelmann J, Gottschalk S, Mayer HA. Synthesis, characterization and examination of Gd[DO3A-hexylamine]-functionalized silica nanoparticles as contrast agent for MRI-applications. J Colloid Interface Sci 2012; 366:70-79. [DOI: 10.1016/j.jcis.2011.09.053] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Revised: 09/05/2011] [Accepted: 09/23/2011] [Indexed: 10/17/2022]
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29
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Drahoš B, Kotek J, Cı́sařová I, Hermann P, Helm L, Lukeš I, Tóth É. Mn2+ Complexes with 12-Membered Pyridine Based Macrocycles Bearing Carboxylate or Phosphonate Pendant Arm: Crystallographic, Thermodynamic, Kinetic, Redox, and 1H/17O Relaxation Studies. Inorg Chem 2011; 50:12785-801. [DOI: 10.1021/ic201935r] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bohuslav Drahoš
- Department of Inorganic Chemistry,
Faculty of Science, Universita Karlova (Charles
University), Hlavova 2030, 128 43 Prague 2, Czech Republic
- Centre de Biophysique Moléculaire, CNRS, rue Charles Sadron, 45071 Orléans, France
| | - Jan Kotek
- Department of Inorganic Chemistry,
Faculty of Science, Universita Karlova (Charles
University), Hlavova 2030, 128 43 Prague 2, Czech Republic
| | - Ivana Cı́sařová
- Department of Inorganic Chemistry,
Faculty of Science, Universita Karlova (Charles
University), Hlavova 2030, 128 43 Prague 2, Czech Republic
| | - Petr Hermann
- Department of Inorganic Chemistry,
Faculty of Science, Universita Karlova (Charles
University), Hlavova 2030, 128 43 Prague 2, Czech Republic
| | - Lothar Helm
- Ecole Polytechnique Fédérale de Lausanne, BCH, Lausanne, Switzerland
| | - Ivan Lukeš
- Department of Inorganic Chemistry,
Faculty of Science, Universita Karlova (Charles
University), Hlavova 2030, 128 43 Prague 2, Czech Republic
| | - Éva Tóth
- Centre de Biophysique Moléculaire, CNRS, rue Charles Sadron, 45071 Orléans, France
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30
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Choi JH, Joshi T, Spiccia L. Syntheses, Structural, and Spectroscopic Properties of Copper(II) Complexes of Constrained Macrocyclic Ligands. Z Anorg Allg Chem 2011. [DOI: 10.1002/zaac.201100398] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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31
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Kretschy D, Koellensperger G, Hann S. Stability assessment of different chelating moieties used for elemental labeling of bio-molecules. Metallomics 2011; 3:1304-9. [PMID: 21922111 DOI: 10.1039/c1mt00114k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Integrating elemental labeling in quantitative LC-ICP-MS based bio-analysis requires fundamental experiments concerning the stability of complexes during analysis. In a competitive approach complex stability of the chelating moieties 1,4,7,10-tetraazacyclododecane-N,N',N'',N'''-tetraaceticacid (DOTA), 1,4,7-triazacyclononane-N,N',N''-triacetic acid (NOTA) and diethylenetriaminepentaacetic dianhydride (DTPA) in combination with 11 different lanthanides was investigated under typical chromatographic conditions. Measurements were carried out via LC-ICP-QMS using a novel mixed mode separation method. The influence of chromatographic separation, pH and temperature on complex stability constants was assessed regarding further applications of multiplexing in bio-analytical assays. The limit of detection (LOD) for LC-ICP-QMS was 0.03 nM for all investigated Tm complexes (0.15 fmol absolute). Quantification of the complexes was performed via external, flow injection based calibration. For all investigated complexes the stability was significantly decreased by the chromatographic conditions. Moreover, complexation by DOTA revealed two different signals suggesting the presence of a stable intermediate product. Ln(3+)-DOTA and Ln(3+)-NOTA complexes provided high stability at 5 °C and 37 °C over a time of 12 hours, whereas Ln(3+)-DTPA complexes showed significant degradation at 37 °C.
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Affiliation(s)
- Daniela Kretschy
- University of Natural Resources and Life Sciences, BOKU Vienna, Department of Chemistry, Division of Analytical Chemistry, Vienna, Austria.
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Abstract
Given the important role of metal ions in fundamental biological processes, the visualization of their concentration in living animals by repeatable, noninvasive imaging techniques, such as MRI, would be highly desirable. A large number of metal-responsive MRI contrast agents, the majority based on Gd(3+) complexes, have been reported in recent years. The contrast-enhancing properties (relaxivity) of a Gd(3+) complex can be most conveniently modulated by interaction with the sensed metal cation via changes in the number of water molecules bound directly to Gd(3+) or changes in the size of the complex, which represent the two major strategies to develop metal sensitive MRI probes. Here, we survey paramagnetic lanthanide complexes involving Gd(3+) agents and paramagnetic chemical exchange saturation transfer probes designed to detect the most important endogenous metal ions: calcium, zinc, iron and copper. Future work will likely focus on extending applications of these agents to living animals, as well as on exploring new ways of creating molecular MRI probes in order to meet requirements such as higher specificity or lower detection limits.
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Tei L, Gugliotta G, Fekete M, Kálmán FK, Botta M. Mn(ii) complexes of novel hexadentate AAZTA-like chelators: a solution thermodynamics and relaxometric study. Dalton Trans 2011; 40:2025-32. [DOI: 10.1039/c0dt01114b] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Drahoš B, Kubíček V, Bonnet CS, Hermann P, Lukeš I, Tóth É. Dissociation kinetics of Mn2+ complexes of NOTA and DOTA. Dalton Trans 2011; 40:1945-51. [DOI: 10.1039/c0dt01328e] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Zebret S, Torres E, Terreno E, Guénée L, Senatore C, Hamacek J. Structure, stability and relaxivity of trinuclear triangular complexes. Dalton Trans 2011; 40:4284-90. [DOI: 10.1039/c0dt01739f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Rolla GA, Tei L, Fekete M, Arena F, Gianolio E, Botta M. Responsive Mn(II) complexes for potential applications in diagnostic Magnetic Resonance Imaging. Bioorg Med Chem 2010; 19:1115-22. [PMID: 20801660 DOI: 10.1016/j.bmc.2010.07.064] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2010] [Revised: 07/15/2010] [Accepted: 07/27/2010] [Indexed: 12/31/2022]
Abstract
The investigation of new Mn(II)-based MRI/Molecular Imaging probes responsive to the enzyme tyrosinase for potential diagnostic applications is herein described. The expression of the enzyme tyrosinase, an oxidoreductase, is up-regulated in melanoma cancer cells. Three novel ligands (L(1), L(2) and L(3)) were designed as modified acyclic polyaminocarboxylate chelates by introducing an l-tyrosine residue in place of an aminoacetate unit. The corresponding Mn(II) complexes were fully characterised by (1)H NMR relaxometric techniques in aqueous media. The responsive activity towards the expression of tyrosinase was then assessed by monitoring the (1)H 1/T(1) relaxivity changes during incubation experiments in buffered solutions containing tyrosinase at different concentrations and in B16F10 melanoma cell homogenate. New insight on the mechanism of action of these systems was gained by measuring the magnetic field dependence of the relaxivity and ESR spectra of the incubated solutions. The systems developed showed responsive activity to tyrosinase with a relaxation enhancement spanning from 50% (MnL(1)) to 350% (MnL(3)) which augurs well for the development of diagnostic probes to detect melanoma cancer.
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Affiliation(s)
- Gabriele A Rolla
- Dipartimento di Scienze dell'Ambiente e della Vita, Università degli Studi del Piemonte Orientale Amedeo Avogadro, Viale T. Michel 11, 15121 Alessandria, Italy
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37
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Wang J, Hu P, Liu B, Jin X, Kong Y, Gao J, Wang D, Wang B, Xu R, Zhang X. Investigation on coordination number and geometrical conformation of rare earth complexes with catenulate aminopolycarboxylic acid ligands. J COORD CHEM 2010. [DOI: 10.1080/00958972.2010.500378] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Jun Wang
- a Department of Chemistry , Liaoning University , Shenyang 110036, P.R. China
| | - Ping Hu
- a Department of Chemistry , Liaoning University , Shenyang 110036, P.R. China
| | - Bin Liu
- b Department of Pharmacy , Liaoning University , Shenyang 110036, P.R. China
| | - Xudong Jin
- a Department of Chemistry , Liaoning University , Shenyang 110036, P.R. China
| | - Yumei Kong
- b Department of Pharmacy , Liaoning University , Shenyang 110036, P.R. China
| | - Jingqun Gao
- a Department of Chemistry , Liaoning University , Shenyang 110036, P.R. China
| | - Dan Wang
- b Department of Pharmacy , Liaoning University , Shenyang 110036, P.R. China
| | - Baoxin Wang
- a Department of Chemistry , Liaoning University , Shenyang 110036, P.R. China
| | - Rui Xu
- a Department of Chemistry , Liaoning University , Shenyang 110036, P.R. China
| | - Xiangdong Zhang
- a Department of Chemistry , Liaoning University , Shenyang 110036, P.R. China
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38
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Towards highly efficient, intelligent and bimodal imaging probes: Novel approaches provided by lanthanide coordination chemistry. CR CHIM 2010. [DOI: 10.1016/j.crci.2010.03.026] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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39
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Abstract
In clinical practice the imaging of bone tissue is based almost exclusively on x-ray or radiochemical methods. Alternative methods, such as MRI and optical imaging, can provide not only anatomical, but also physiological information, due to their ability to reflect the properties of body fluids (temperature, pH and concentration of ions). In this article we review bone targeting probes for MRI and fluorescence imaging. As bone targeting is mainly associated with phosphonate and bisphosphonate derivatives, we also focus on their sorption behavior. Also discussed in detail is the limitation of using bone-targeting probes for MRI and optical imaging mainly due to their long-time retention in bone tissue and the low permeability of tissues for light.
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41
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Mercer DJ, Loeb SJ. Metal-based anion receptors: an application of second-sphere coordination. Chem Soc Rev 2010; 39:3612-20. [DOI: 10.1039/b926226c] [Citation(s) in RCA: 144] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Gugliotta G, Botta M, Tei L. AAZTA-based bifunctional chelating agents for the synthesis of multimeric/dendrimeric MRI contrast agents. Org Biomol Chem 2010; 8:4569-74. [DOI: 10.1039/c0ob00096e] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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