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Côrte-Real L, Sergi B, Yildirim B, Colucas R, Starosta R, Fontrodona X, Romero I, André V, Acilan C, Correia I. Enhanced selectivity towards melanoma cells with zinc(II)-Schiff bases containing imidazole derivatives. Dalton Trans 2024; 53:9416-9432. [PMID: 38758025 DOI: 10.1039/d4dt00733f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
Zinc(II)-complexes with the general formula [Zn(L)2] containing 8-hydroxyquinoline Schiff bases functionalized with 1-(3-aminopropyl)imidazole or 1-(3-aminopropyl)-2-methyl-1H-imidazole on 2-position and their respective ligands (HL1 or HL2) were synthesized and characterized by NMR, UV-Vis, FTIR and CD spectroscopies as well as ESI-MS spectrometry. Single crystals of HL2 and [Zn(L1)2]n were analysed by SC-XRD. [Zn(L1)2]n shows a 1D polymeric chain structure of alternating Zn(II) cations and bridging Schiff base ligands, in contrast to previously reported monomeric structures of analogous complexes. DFT calculations were performed to rationalize the polymeric X-ray structure of Zn(L1)2. Results showed that the ligands can bind as bi- or tridentate to Zn(II) and there is the possibility of a dynamic behavior for the complexes in solution. Both ligands and complexes present limited stability in aqueous media, however, in the presence of bovine serum albumin the complexes are stable. Molecular docking simulations and circular dichroism spectroscopic studies suggest binding to this protein in close proximity to the Trp213 residue. Biological studies on a panel of cancer cells revealed that the Zn(II)-complexes have a lower impact on cell viability than cisplatin, except for triple-negative breast cancer cells in which they were comparable. Notwithstanding, they display much higher selectivity towards cancer cells vs. normal cells, than cisplatin. They induce the generation of ROS and DNA double-strand breaks, primarily through apoptosis as the mode of cell death. Overall, the novel Zn(II)-complexes demonstrate improved induction of apoptosis and higher selectivity, particularly for melanoma cells, compared to previously reported analogues, making them promising candidates for clinical application.
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Affiliation(s)
- Leonor Côrte-Real
- Centro de Química Estrutural, Institute of Molecular Sciences, and Department of Chemical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049-001 Lisboa, Portugal.
| | - Baris Sergi
- Koç University, Research Center for Translational Medicine (KUTTAM), Istanbul, Turkey
| | - Busra Yildirim
- Koç University, Research Center for Translational Medicine (KUTTAM), Istanbul, Turkey
| | - Raquel Colucas
- Centro de Química Estrutural, Institute of Molecular Sciences, and Department of Chemical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049-001 Lisboa, Portugal.
| | - Radosław Starosta
- Centro de Química Estrutural, Institute of Molecular Sciences, and Department of Chemical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049-001 Lisboa, Portugal.
- Faculty of Chemistry, University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Xavier Fontrodona
- Departament de Química and Serveis Técnicas de Recerca, Universitat de Girona, Spain
| | - Isabel Romero
- Departament de Química and Serveis Técnicas de Recerca, Universitat de Girona, Spain
| | - Vânia André
- Centro de Química Estrutural, Institute of Molecular Sciences, and Department of Chemical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049-001 Lisboa, Portugal.
| | - Ceyda Acilan
- Koç University, School of Medicine, Sariyer, Istanbul, Turkey.
- Koç University, Research Center for Translational Medicine (KUTTAM), Istanbul, Turkey
| | - Isabel Correia
- Centro de Química Estrutural, Institute of Molecular Sciences, and Department of Chemical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049-001 Lisboa, Portugal.
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Zeng M, Chen L, Hou X, Jin J, Yao Q, Ye T, Guo Z, Chen X, Chen X. Metal-assisted core-shell plasmonic nanoparticles for small molecule biothiol analysis and enantioselective recognition. NANOSCALE 2024; 16:5232-5241. [PMID: 38358089 DOI: 10.1039/d3nr05984g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
Cysteine (Cys) enantiomorphs, important small-molecule biothiols, participate in various antioxidative, flavoring, and poison-removing processes in the food industry. Current cysteine enantiomorph analysis methods require effective strategies for distinguishing them due to their similar structures and reactivity. Herein, we present a metal ion-assisted enantiomorph-selective surface-enhanced Raman scattering (SERS) biosensor based on an amphiphilic polymer matrix (APM), which can promote cysteine enantiomorph (L/D-Cys) identification. The highly selective molecular orientation is perhaps caused by the intermolecular hydrogen bonding with chiral isomers (metal centers). The experimental results show that the SERS biosensor has a sensitivity-distincting factor toward L-Cys and D-Cys. The linear range is from 1 mmol L-1 to 1 nmol L-1, along with a low limit of detection of 0.77 pmol L-1. Moreover, the fabricated Cu-APM biosensor exhibits remarkable stability and high repeatability, with an RSD of 3.7%. Real food cysteine enantiomorph detection was performed with L-Cys-containing samples of onion, cauliflower, garlic, and apple, and D-Cys-containing samples of vinegar, black garlic, cheese, and beer. The results show that the Cu-APM biosensor can be utilized as a powerful tool for real-time determination of Cys enantiomorphs in different food samples. Thus, the metal-ion-assisted enantiomorph-selective SERS biosensor has potential as an adaptable tool for enantiomorph detection and food sample analysis.
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Affiliation(s)
- Meihuang Zeng
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China.
| | - Linmin Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China.
| | - Xiaocong Hou
- Institute of Analytical Technology and Smart Instruments and Colleague of Environment and Public Healthy, Xiamen Huaxia University, Xiamen 361024, China.
| | - Jingwen Jin
- Institute of Analytical Technology and Smart Instruments and Colleague of Environment and Public Healthy, Xiamen Huaxia University, Xiamen 361024, China.
| | - Qiuhong Yao
- Institute of Analytical Technology and Smart Instruments and Colleague of Environment and Public Healthy, Xiamen Huaxia University, Xiamen 361024, China.
| | - Tingxiu Ye
- College of Pharmacy, Xiamen Medicine College, Xiamen 361005, China
| | - Zhiyong Guo
- Institute of Analytical Technology and Smart Instruments and Colleague of Environment and Public Healthy, Xiamen Huaxia University, Xiamen 361024, China.
- Xiamen Environmental Monitoring Engineering Technology Research Center, Xiamen 361024, China
| | - Xiaomei Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China.
| | - Xi Chen
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China.
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Bento-Oliveira A, Moita MLCJ, de Almeida RFM, Starosta R. Unraveling environmental effects in the absorption and fluorescence spectra of p-methoxyphenylpiperazine derivatives. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 306:123583. [PMID: 37913739 DOI: 10.1016/j.saa.2023.123583] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 10/16/2023] [Accepted: 10/26/2023] [Indexed: 11/03/2023]
Abstract
The p-methoxyphenylpiperazine motif can be found in many biologically active molecules, including approved drugs. It is characterized by a relatively weak fluorescence, which can be employed in different types of studies involving molecules with this motif. In this work, a thorough analysis of the absorption, excitation and emission spectra of the diphenyl(aminomethyl)phosphine and tris(aminomethyl)phosphine derivatives of p-methoxyphenylpiperazine, supported by the DFT calculations (ωB97XD/6-311++G(d,p)) with NBO and QTAIM analysis also for different model molecules (e.g. 1-(4-methoxyphenyl)-4-methylpiperazine) enabled determination of the mechanisms underlying beneath the electronic transitions and allowed to rationalize mixed solvent effects observed in electronic spectra of the studied compounds. Electronic transition from the ground state to the first excited state can be regarded as the n,π → π* transition with no solvatochromic effects, however the hydrogen bonds between the HBD solvent molecules and the nitrogen atom bound directly to the aromatic ring (N(4)) are shifting strongly the 1st absorption or excitation band maxima to the higher energies. Fluorescence band, as a result of the electron transition from the equilibrated 1st excited state to the ground state, can be described as the π*→π with positive solvatochromism. N(4) in the excited states adopts a sp2 hybridization and is no longer able to form HBs. On the other hand, increased electron density on the aromatic ring makes the emission processes vulnerable to its direct environment.
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Affiliation(s)
- Andreia Bento-Oliveira
- Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
| | - Maria-Luísa C J Moita
- Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
| | - Rodrigo F M de Almeida
- Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
| | - Radosław Starosta
- Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal; Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland.
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Ramek M, Sabolović J. Structure prediction of physiological bis(amino acidato)copper(II) species in aqueous solution: The copper(II) compounds with l-glutamine and l-histidine. J Inorg Biochem 2024; 251:112430. [PMID: 38006660 DOI: 10.1016/j.jinorgbio.2023.112430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 10/27/2023] [Accepted: 11/13/2023] [Indexed: 11/27/2023]
Abstract
Neutral (l-histidinato)(l-glutaminato)copper(II) [Cu(His)(Gln)] has been established as the most abundant ternary copper(II) amino acid compound of the exchangeable copper(II) pool in blood plasma. The experimental studies of Cu(His)(Gln) and bis(glutaminato)copper(II) [Cu(Gln)2] in solutions did not specify their complete geometries. To determine the geometries, this paper investigates the conformers, energy landscapes, and a structure-magnetic parameters relation of Cu(Gln)2 and Cu(His)(Gln) by the density functional theory (DFT) calculations. We assume a glycine-like coordination of Gln (other coordination patterns are dismissed because of steric reasons), and three His in-plane copper(II) binding modes. The conformational analyses are performed in the gas phase and implicitly modeled aqueous solution. The reliability of the DFT relative electronic and Gibbs free energies of the Cu(His)(Gln) conformers is confirmed by benchmarking against the corresponding energies obtained by the domain-based local pair natural orbital coupled-cluster method with singles, doubles, and perturbative triples [DLPNO-CCSD(T)]. Several cis- and trans-Cu(His)(Gln) conformers with His in the histaminate-like and glycine-like modes have low Gibbs free energies, and the greatest estimated metal-binding affinities. The DFT-calculated magnetic parameters of the low-energy conformers reproduce best the experimental electron paramagnetic resonance parameters measured in aqueous solutions for trans- and cis-Cu(Gln)2 conformers having two oxygen atoms (either from Gln or water molecules) at the apical positions, and Cu(His)(Gln) conformers having His in the histaminate-like mode with an apically placed carboxylato oxygen atom. The predicted conformational flexibility of His‑copper(II)-amino acid compounds may be connected with their physiological abundance, and the role in copper(II) exchange reactions in blood plasma.
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Affiliation(s)
- Michael Ramek
- Institute of Physical and Theoretical Chemistry, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
| | - Jasmina Sabolović
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, HR-10000 Zagreb, Croatia.
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Starosta R, de Almeida RFM, Puchalska M, Suchodolski J, Derkacz D, Krasowska A. Anticandidal Cu(I) complexes with neocuproine and 1-(4-methoxyphenyl)piperazine based diphenylaminomethylphosphine: Is Cu-diimine moiety a pharmacophore? J Inorg Biochem 2023; 248:112355. [PMID: 37579689 DOI: 10.1016/j.jinorgbio.2023.112355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 07/29/2023] [Accepted: 08/08/2023] [Indexed: 08/16/2023]
Abstract
The studies on metal complexes as potential antifungals are of growing interest because they may be the answer to increasingly effective defense mechanisms. Herein we present two new copper(I) iodide or thiocyanide complexes with 2,9-dimethyl-1,10-phenanthroline (dmp) and diphenylphosphine derivative of 1-(4-methoxyphenyl)piperazine (4MP): [CuI(dmp)4MP] (1-4MP) and [CuNCS(dmp)4MP] (2-4MP) - their synthesis, as well as structural and spectroscopic characteristics. Interestingly, while 4MP and its oxide derivative (4MOP) show a very low or no activity against all tested Candida albicans strains (MIC50 ≥ 200 μM against CAF2-1 - laboratory control strain, DSY1050 - mutant without transporters Cdr1, Cdr2, Mdr1; isogenic for CAF2-1, and fluconazole resistant clinical isolates), for 1-4MP and 2-4MP MIC50 values were 0.4 μM, independently on the complex and strain tested. Determination of the viability of NHDF-Ad (Normal Adult Human Dermal Fibroblasts) cell line treated with 1-4MP and 2-4MP showed that for both complexes there was only a 20% reduction in the concentration range ¼ to 2 × MIC50 and the 70% at 4 × MIC50. Subsequently, the MLCT based luminescence of the complexes in aqueous media allowed to record the confocal micrographs of 1-4MP in the cells. The results show that it is situated most likely in the vacuoles (C. albicans) or lysosomes (NHDF-Ad).
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Affiliation(s)
- Radosław Starosta
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland; Centro de Química Estrutural, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal.
| | - Rodrigo F M de Almeida
- Centro de Química Estrutural, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
| | - Małgorzata Puchalska
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland
| | - Jakub Suchodolski
- Faculty of Biological Sciences, University of Wroclaw, Przybyszewskiego 63, 51-148 Wrocław, Poland; Faculty of Biotechnology, University of Wroclaw, F. Joliot-Curie 14a, 50-383 Wroclaw, Poland
| | - Daria Derkacz
- Faculty of Biotechnology, University of Wroclaw, F. Joliot-Curie 14a, 50-383 Wroclaw, Poland
| | - Anna Krasowska
- Faculty of Biotechnology, University of Wroclaw, F. Joliot-Curie 14a, 50-383 Wroclaw, Poland
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DFT study on the synthesis of trifluoroacetophenone from palladium complex L nPd(Ph)CF 3 (L n = Xantphos or DtBPF) and CO. J Mol Model 2022; 28:48. [PMID: 35083574 DOI: 10.1007/s00894-022-05030-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 01/17/2022] [Indexed: 10/19/2022]
Abstract
The carbonylative trifluoromethylation reaction mechanism of palladium complex LnPd(Ph)CF3 (Ln = Xantphos or DtBPF) and CO to synthesize trifluoroacetophenone was calculated using the density functional theory B3LYP method. In this paper, we conducted a computational study on the competition mechanism of two different products trifluorotoluene and trifluoroacetophenone. The calculation result reveals (1) CO insertion and reduction-elimination are two key steps in palladium-catalyzed reactions; (2) for the palladium complex (Xantphos)Pd(Ph)CF3, the resulting product trifluoroacetyl has a lower activation energy and higher reactivity; and (3) for the metal palladium ligand DtBPF, the small energy difference between the two products indicates that the stereoselectivity of the product is relatively poor. The computational research results in this paper provide a good supplement and effective explanation to the experimental phenomenon of Domino et al. (Organometallics 39:688-697, 2020).
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Ramek M, Pejić J, Sabolović J. Structure prediction of neutral physiological copper(II) compounds with l-cysteine and l-histidine. J Inorg Biochem 2021; 223:111536. [PMID: 34274876 DOI: 10.1016/j.jinorgbio.2021.111536] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 06/19/2021] [Accepted: 07/05/2021] [Indexed: 10/20/2022]
Abstract
Bis(aminoacidato)copper(II) [CuII(aa)2] coordination compounds are the physiological species of copper(II) amino acid compounds in blood plasma. Since there are no experimental data in the literature about the geometries that physiological CuII(aa)2 could form with l-cysteine (Cys), that is, for bis(l-cysteinato)copper(II) [Cu(Cys)2] and the ternary (l-histidinato)(l-cysteinato)copper(II) [Cu(His)(Cys)], this paper computationally examines the possible conformations that the two compounds could form with the Cys ligand having a protonated sulfur, as in the conventional zwitterion, which was determined to be prevailing in aqueous solution. These two amino acids can bind metals in a tridentate fashion and thus form many possible coordination patterns. Density functional calculations were performed for the conformational analyses in the gas phase and in implicitly modeled aqueous solution using a polarizable continuum model. Additionally, we examine which coordination mode, with thiol or thiolate group, is more stable. The Cys coordination via the amino N and carboxylato O atoms (a glycinato mode) is obtained as the most stable one in aqueous Cu(Cys)2, and also in Cu(His)(Cys) when the His glycinato or histaminato mode combines with the intact thiol group. Whereas the conformers with N and thiol S as the copper(II) donor atoms are predicted to be the least stable, those with the Cu-N and Cu-S(thiolate) bonding (and protonated carboxylato group) are the most stable. The differences are explained by different covalent and ionic contributions of Cu-S(thiol) vs. Cu-S(thiolate). The study can contribute to the insight into formation and reactivity of the copper(II) cysteinato complexes in solution.
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Affiliation(s)
- Michael Ramek
- Institute of Physical and Theoretical Chemistry, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
| | - Jelena Pejić
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, HR-10000 Zagreb, Croatia
| | - Jasmina Sabolović
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, HR-10000 Zagreb, Croatia.
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Ramek M, Marković M, Mutapčić I, Pejić J, Kelterer A, Sabolović J. Conformational Analyses of Physiological Binary and Ternary Copper(II) Complexes with l-Asparagine and l-Histidine; Study of Tridentate Binding of Copper(II) in Aqueous Solution. ChemistryOpen 2019; 8:852-868. [PMID: 31309033 PMCID: PMC6607419 DOI: 10.1002/open.201900159] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Indexed: 01/26/2023] Open
Abstract
This study explores the structural properties and energy landscapes of the physiologically important bis(l-asparaginato)copper(II) [Cu(l-Asn)2] and (l-histidinato)(l-asparaginato)copper(II) [Cu(l-His)(l-Asn)]. The conformational analyses in the gas phase and implicitly modeled water medium, and magnetic parameters of electron paramagnetic resonance spectra were attained using density functional theory calculations. The apical CuII coordination and hydrogen bonding were analyzed. Predicted lower-energy structures enabled the confirmation and, for apical bonding, also the refinement of structural proposals from literature. Available experimental results were indecisive regarding the amido-group binding in the CuII equatorial plane in solutions, but the examination of the relative stability of Cu(l-Asn)2 conformers in 30 binding modes confirms the glycine-like mode as the most stable one. Previously reported experimental results for Cu(l-His)(l-Asn) were interpreted for l-His to have a tridentate histamine-like mode. However, the aqueous conformers with l-His in the glycinato mode are also predicted to have low energies, which does not contradict the tridentate l-His binding. The predicted magnetic parameters of conformers with an apical oxygen atom (intramolecular or from a water molecule) can reproduce the experimental data. An extent of conformational flexibility and abundance of l-His-containing ternary copper(II) amino acid complexes under physiological conditions may be related.
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Affiliation(s)
- Michael Ramek
- Institute of Physical and Theoretical ChemistryGraz University of TechnologyStremayrgasse 9A-8010GrazAustria
| | - Marijana Marković
- Institute of Physical and Theoretical ChemistryGraz University of TechnologyStremayrgasse 9A-8010GrazAustria
| | - Ilina Mutapčić
- Institute of Physical and Theoretical ChemistryGraz University of TechnologyStremayrgasse 9A-8010GrazAustria
| | - Jelena Pejić
- Institute for Medical Research and Occupational HealthKsaverska cesta 2HR-10000ZagrebCroatia Homepage: https://www.imi.hr/en/djelatnik/sabolovic-jasmina-2/
| | - Anne‐Marie Kelterer
- Institute of Physical and Theoretical ChemistryGraz University of TechnologyStremayrgasse 9A-8010GrazAustria
| | - Jasmina Sabolović
- Institute for Medical Research and Occupational HealthKsaverska cesta 2HR-10000ZagrebCroatia Homepage: https://www.imi.hr/en/djelatnik/sabolovic-jasmina-2/
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