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Benkő BM, Tóth G, Moldvai D, Kádár S, Szabó E, Szabó ZI, Kraszni M, Szente L, Fiser B, Sebestyén A, Zelkó R, Sebe I. Cyclodextrin encapsulation enabling the anticancer repositioning of disulfiram: Preparation, analytical and in vitro biological characterization of the inclusion complexes. Int J Pharm 2024; 657:124187. [PMID: 38697585 DOI: 10.1016/j.ijpharm.2024.124187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 04/22/2024] [Accepted: 04/29/2024] [Indexed: 05/05/2024]
Abstract
Drug repositioning is a high-priority and feasible strategy in the field of oncology research, where the unmet medical needs are continuously unbalanced. Disulfiram is a potential non-chemotherapeutic, adjuvant anticancer agent. However, the clinical translation is limited by the drug's poor bioavailability. Therefore, the molecular encapsulation of disulfiram with cyclodextrins is evaluated to enhance the solubility and stability of the drug. The present work describes for the first time the complexation of disulfiram with randomly methylated-β-cyclodextrin. A parallel analytical andin vitrobiological comparison of disulfiram inclusion complexes with hydroxypropyl-β-cyclodextrin, randomly methylated-β-cyclodextrin and sulfobutylether-β-cyclodextrin is conducted. A significant drug solubility enhancement by about 1000-folds and fast dissolution in 1 min is demonstrated. Thein vitrodissolution-permeation studies and proliferation assays demonstrate the solubility-dependent efficacy of the drug. Throughout the different cancer cell lines' characteristics and disulfiram unspecific antitumoral activity, the inhibitory efficacy of the cyclodextrin encapsulated drug on melanoma (IC50 about 100 nM) and on glioblastoma (IC50 about 7000 nM) cell lines differ by a magnitude. This pre-formulation screening experiment serves as a proof of concept of using cyclodextrin encapsulation as a platform tool for further drug delivery development in repositioning areas.
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Affiliation(s)
- Beáta-Mária Benkő
- University Pharmacy Department of Pharmacy Administration, Semmelweis University, Hőgyes Endre Str. 7-9., Budapest 1092, Hungary.
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre Str. 7-9., Budapest 1092, Hungary.
| | - Dorottya Moldvai
- Tumor Biology, Cell and Tissue Culture Laboratory, 1st Department of Pathology and Experimental Cancer Research, Semmelweis University, Üllői út 26., Budapest 1085, Hungary.
| | - Szabina Kádár
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre Str. 7-9., Budapest 1092, Hungary; Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest 1111, Hungary.
| | - Edina Szabó
- Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest 1111, Hungary.
| | - Zoltán-István Szabó
- Faculty of Pharmacy Department of Drugs Industry and Pharmaceutical Management, George Emil Palade University of Medicine, Pharmacy, Science and Technology of Targu Mures, Gheorghe Marinescu Str. 38, Târgu Mureș 540142, Romania.
| | - Márta Kraszni
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre Str. 7-9., Budapest 1092, Hungary.
| | - Lajos Szente
- CycloLab Cyclodextrin Research & Development Laboratory Ltd., Illatos út 7, Budapest 1097, Hungary.
| | - Béla Fiser
- Institute of Chemistry, Faculty of Materials Science and Chemical Engineering, University of Miskolc, Egyetemváros, Miskolc 3515, Hungary; Department of Physical Chemistry, Faculty of Chemistry, University of Lodz, 90-236 Lodz, Poland; Ferenc Rakoczi II Transcarpathian Hungarian College of Higher Education, 90200 Beregszász, Transcarpathia, Ukraine.
| | - Anna Sebestyén
- Tumor Biology, Cell and Tissue Culture Laboratory, 1st Department of Pathology and Experimental Cancer Research, Semmelweis University, Üllői út 26., Budapest 1085, Hungary.
| | - Romána Zelkó
- University Pharmacy Department of Pharmacy Administration, Semmelweis University, Hőgyes Endre Str. 7-9., Budapest 1092, Hungary.
| | - István Sebe
- University Pharmacy Department of Pharmacy Administration, Semmelweis University, Hőgyes Endre Str. 7-9., Budapest 1092, Hungary; Egis Pharmaceuticals Plc., R&D Directorate, P.O. Box 100, Budapest 1475, Hungary.
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Kádár S, Kennedy A, Lee S, Ruiz R, Farkas A, Tőzsér P, Csicsák D, Tóth G, Sinkó B, Borbás E. Bioequivalence prediction with small-scale biphasic dissolution and simultaneous dissolution-permeation apparatus- an aripiprazole case study. Eur J Pharm Sci 2024:106782. [PMID: 38697313 DOI: 10.1016/j.ejps.2024.106782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 04/08/2024] [Accepted: 04/29/2024] [Indexed: 05/04/2024]
Abstract
Both biphasic dissolution and simultaneous dissolution-permeation (D-P) systems have great potential to improve the in vitro-in vivo correlation compared to simple dissolution assays, but the assay conditions, and the evaluation methods still need to be refined in order to effectively use these apparatuses in drug development. Therefore, this comprehensive study aimed to compare the predictive accuracy of small-volume (16-20 mL) D-P system and small-volume (40-80 mL) biphasic dissolution apparatus in bioequivalence prediction of five aripiprazole (ARP) containing marketed drug products. Assay conditions, specifically dose dependence were studied to overcome the limitations of both small-scale systems. In case of biphasic dissolution the in vivo maximum plasma concentration (Cmax) prediction greatly improved with the dose reduction of ARP, while in case of the D-P setup the use of whole tablet gave just as accurate prediction as the scaled dose. With the dose reduction strategy both equipment was able to reach 100% accuracy in bioequivalence prediction for Cmax ratio. In case of the in vivo area under the curve (AUC) prediction the predictive accuracy for the AUC ratio was not dependent on the dose, and both apparatus had a 100% accuracy predicting bioequivalence based on AUC results. This paper presents for the first time that not only selected parameters of flux assays (like permeability, initial flux, AUC value) were used as an input parameter of a mechanistic model (gastrointestinal unified theory) to predict absorption rate but the whole in vitro flux profile was used. All fraction absorbed values estimated by Predictor Software fell within the +/- 15% acceptance range during the comparison with the in vivo data.
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Affiliation(s)
- Szabina Kádár
- Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, 3 Műegyetem rkp, H-1111, Budapest, Hungary
| | - Andrew Kennedy
- Pion Inc UK Ltd., Forest Row Business Park, Forest Row RH18 5DW, UK
| | - Samuel Lee
- Pion Inc UK Ltd., Forest Row Business Park, Forest Row RH18 5DW, UK
| | - Rebeca Ruiz
- Pion Inc UK Ltd., Forest Row Business Park, Forest Row RH18 5DW, UK
| | - Attila Farkas
- Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, 3 Műegyetem rkp, H-1111, Budapest, Hungary
| | - Petra Tőzsér
- Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, 3 Műegyetem rkp, H-1111, Budapest, Hungary
| | - Dóra Csicsák
- Department of Pharmaceutical Chemistry, Semmelweis University, 9 Hőgyes Endre Street, Budapest, 1092, Hungary
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, 9 Hőgyes Endre Street, Budapest, 1092, Hungary
| | - Bálint Sinkó
- Pion Inc., 10 Cook Street, Billerica, MA 01821, USA.
| | - Enikő Borbás
- Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, 3 Műegyetem rkp, H-1111, Budapest, Hungary.
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3
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Dobó M, Dombi G, Köteles I, Fiser B, Kis C, Szabó ZI, Tóth G. Simultaneous Determination of Enantiomeric Purity and Organic Impurities of Dexketoprofen Using Reversed-Phase Liquid Chromatography-Enhancing Enantioselectivity through Hysteretic Behavior and Temperature-Dependent Enantiomer Elution Order Reversal on Polysaccharide Chiral Stationary Phases. Int J Mol Sci 2024; 25:2697. [PMID: 38473945 DOI: 10.3390/ijms25052697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 02/21/2024] [Accepted: 02/23/2024] [Indexed: 03/14/2024] Open
Abstract
A reversed-phase high-performance liquid chromatographic (HPLC) method was developed for the simultaneous determination of the potential impurities of dexketoprofen, including the distomer R-ketoprofen. After screening the separation capability of four polysaccharide columns (Lux Amylose-1, Lux Amylose-2, Lux Cellulose-1 and Lux Cellulose-2) in polar organic and in reversed-phase modes, appropriate enantioseparation was observed only on the Lux Amylose-2 column in an acidified acetonitrile/water mixture. A detailed investigation of the mobile phase composition and temperature for enantio- and chemoselectivity showed many unexpected observations. It was observed that both the resolution and the enantiomer elution order can be fine-tuned by varying the temperature and mobile phase composition. Moreover, hysteresis of the retention times and enantioselectivity was also observed in reversed-phase mode using methanol/water mixtures on amylose-type columns. This could indicate that the three-dimensional structure of the amylose column can change by transitioning from a polar organic to a reversed-phase mode, which affects the enantioseparation process. Temperature-dependent enantiomer elution order and rare enthalpic/entropic controlled enantioseparation in the operative temperature range were also observed in reversed-phase mode. To find the best methodological conditions for the determination of dexketoprofen impurities, a full factorial optimization design was performed. Using the optimized parameters (Lux Amylose-2 column with water/acetonitrile/acetic acid 50/50/0.1 (v/v/v) at a 1 mL/min flow rate at 20 °C), baseline separations were achieved between all compounds within 15 min. Our newly developed HPLC method was validated according to the current guidelines, and its application was tested on commercially available pharmaceutical formulations. According to the authors' knowledge, this is the first study to report hysteretic behavior on polysaccharide columns in reversed-phase mode.
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Affiliation(s)
- Máté Dobó
- Department of Pharmaceutical Chemistry, Semmelweis University, Hogyes 9, H-1092 Budapest, Hungary
| | - Gergely Dombi
- Department of Pharmaceutical Chemistry, Semmelweis University, Hogyes 9, H-1092 Budapest, Hungary
| | - István Köteles
- Department of Pharmaceutical Chemistry, Semmelweis University, Hogyes 9, H-1092 Budapest, Hungary
- Department of Chemistry and Molecular Biology, University of Gothenburg, Medicinaregatan 19, 41390 Göteborg, Sweden
| | - Béla Fiser
- Institute of Chemistry, University of Miskolc, H-3515 Miskolc, Hungary
- Ferenc Rakoczi II. Transcarpathian Hungarian College of Higher Education, 90200 Beregszasz, Ukraine
- Department of Physical Chemistry, Faculty of Chemistry, University of Lodz, 90-149 Lodz, Poland
| | - Csenge Kis
- Department of Pharmaceutical Industry and Management, George Emil Palade University of Medicine, Pharmacy, Science and Technology of Targu Mures, Gh. Marinescu 38, 540139 Targu Mures, Romania
| | - Zoltán-István Szabó
- Department of Pharmaceutical Industry and Management, George Emil Palade University of Medicine, Pharmacy, Science and Technology of Targu Mures, Gh. Marinescu 38, 540139 Targu Mures, Romania
- Sz-imfidum Ltd., Lunga nr. 504, 525401 Targu Mures, Romania
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, Hogyes 9, H-1092 Budapest, Hungary
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Tóth G, Háhn J, Szabó G, Bakos K, Volner C, Liang X, Göbölös B, Bock I, Szoboszlay S, Urbányi B, Kriszt B, Kaszab E, Szabó I, Csenki Z. In vivo estrogenicity of glyphosate, its formulations, and AMPA on transgenic zebrafish (Danio rerio) embryos. Environ Pollut 2024; 342:123113. [PMID: 38072021 DOI: 10.1016/j.envpol.2023.123113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 11/20/2023] [Accepted: 12/05/2023] [Indexed: 01/26/2024]
Abstract
In this study, the disrupting effects of glyphosate (GLY), aminomethylphosphonic acid (AMPA), and three glyphosate-based herbicides (GBHs) on vitellogenesis in a non-concentration-dependent manner are reported for the first time in 120 h of acute exposure of zebrafish at environmentally relevant concentrations. GBHs are commonly used worldwide in weed control management. Due to their extensive application, they frequently occur in aquatic ecosystems and may affect various organisms. The active substance GLY and its major by-product, AMPA, are the most thoroughly studied chemicals; however, the adverse effects of the complex formulas of GBHs with diverse and unknown content of co-formulants are still not sufficiently researched. This study focused on the embryotoxicity, sublethal malformations, and estrogenic potency of GLY, AMPA, and four commonly used GBHs on zebrafish embryos using a wild type and an estrogen-sensitive, transgenic zebrafish line (Tg(vtg1:mCherry)). After 120 h of exposition, AMPA did not cause acute toxicity, while the LC50 of GLY was 160 mg/L. The GBHs were more toxic with LC50 values ranging from 31 to 111 GLY active equivalent (a.e.) mg/L. Exposure to 0.35-2.8 mg/L GBHs led to sublethal abnormalities: typical symptoms were structural deformation of the lower jaw and anomalies in the olfactory region. Deformity rates were 10-30% in the treated groups. In vivo, fluorescently expressed vtg1 mCherry protein in embryonic liver was detected by a non-invasive microscopic method indicating estrogenic action through vitellogenin production by GLY, AMPA, and GBHs. To confirm the in vivo findings, RT-qPCR method was performed to determine the levels of the estrogenicity-related vtg1 mRNA. After 120 h of exposure to GLY, AMPA, and three GBHs at a concentration of 0.35 mg/L, the expression of vtg1 gene was significantly up-regulated. Our results highlight the risk that short-term GLY and GBH exposure can cause developmental malformations and disrupt the hormonal balance in zebrafish embryos.
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Affiliation(s)
- Gergő Tóth
- Institute of Aquaculture and Environmental Safety, Department of Environmental Safety, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1, H-2100, Gödöllő, Hungary.
| | - Judit Háhn
- Institute of Aquaculture and Environmental Safety, Department of Environmental Safety, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1, H-2100, Gödöllő, Hungary.
| | - Gyula Szabó
- Institute of Aquaculture and Environmental Safety, Department of Environmental Toxicology, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1, H-2100, Gödöllő, Hungary.
| | - Katalin Bakos
- Premonstratensian St. Norbert High School, Takács Menyhért út 2, H-2100, Gödöllő, Hungary.
| | - Cintia Volner
- Institute of Aquaculture and Environmental Safety, Department of Environmental Toxicology, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1, H-2100, Gödöllő, Hungary.
| | - Xinyue Liang
- Institute of Aquaculture and Environmental Safety, Department of Environmental Toxicology, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1, H-2100, Gödöllő, Hungary.
| | - Balázs Göbölös
- Institute of Aquaculture and Environmental Safety, Department of Environmental Safety, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1, H-2100, Gödöllő, Hungary.
| | - Illés Bock
- Institute of Aquaculture and Environmental Safety, Department of Environmental Toxicology, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1, H-2100, Gödöllő, Hungary.
| | - Sándor Szoboszlay
- Institute of Aquaculture and Environmental Safety, Department of Environmental Safety, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1, H-2100, Gödöllő, Hungary.
| | - Béla Urbányi
- Institute of Aquaculture and Environmental Safety, Department of Aquaculture, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1, H-2100, Gödöllő, Hungary.
| | - Balázs Kriszt
- Institute of Aquaculture and Environmental Safety, Department of Environmental Safety, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1, H-2100, Gödöllő, Hungary.
| | - Edit Kaszab
- Institute of Aquaculture and Environmental Safety, Department of Environmental Safety, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1, H-2100, Gödöllő, Hungary.
| | - István Szabó
- Institute of Aquaculture and Environmental Safety, Department of Environmental Toxicology, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1, H-2100, Gödöllő, Hungary.
| | - Zsolt Csenki
- Institute of Aquaculture and Environmental Safety, Department of Environmental Toxicology, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1, H-2100, Gödöllő, Hungary.
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Ferencz E, Kelemen ÉK, Obreja M, Tóth G, Urkon M, Zöldhegyi A, Sipos E, Szabó ZI. The Applicability of Chromatographic Retention Modeling on Chiral Stationary Phases in Reverse-Phase Mode: A Case Study for Ezetimibe and Its Impurities. Int J Mol Sci 2023; 24:16097. [PMID: 38003286 PMCID: PMC10671152 DOI: 10.3390/ijms242216097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 11/01/2023] [Accepted: 11/06/2023] [Indexed: 11/26/2023] Open
Abstract
Mechanistic modeling is useful for predicting and modulating selectivity even in early chromatographic method development. This approach is also in accordance with current analytical quality using design principles and is highly welcomed by the authorities. The aim of this study was to investigate the separation behavior of two different types of chiral stationary phases (CSPs) for the separation of ezetimibe and its related substances using the mechanistic retention modeling approach offered by the Drylab software (version 4.5) package. Based on the obtained results, both CSPs presented with chemoselectivity towards the impurities of ezetimibe. The cyclodextrin-based CSP displayed a higher separation capacity and was able to separate seven related substances from the active pharmaceutical ingredient, while the cellulose-based column enabled the baseline resolution of six impurities from ezetimibe. Generally, the accuracy of predicted retention times was lower for the polysaccharide CSP, which could indicate the presence of additional secondary interactions between the analytes and the CSP. It was also demonstrated that the combination of mechanistic modeling and an experimental design approach can be applied to method development on CSPs in reverse-phase mode. The applicability of the methods was tested on spiked artificial placebo samples, while intraday and long-term (2 years) method repeatability was also challenged through comparing the obtained retention times and resolution values. The results indicated the excellent robustness of the selected setpoints. Overall, our findings indicate that the chiral columns could offer orthogonal selectivity to traditional reverse-phase columns for the separation of structurally similar compounds.
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Affiliation(s)
- Elek Ferencz
- Department of Physical Chemistry, Faculty of Pharmacy, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 540142 Targu Mures, Romania;
- Gedeon Richter Romania S.A., Analytical Development Department, 540306 Targu Mures, Romania
| | - Éva-Katalin Kelemen
- Gedeon Richter Romania S.A., Analytical Development Department, 540306 Targu Mures, Romania
| | - Mona Obreja
- Gedeon Richter Romania S.A., Analytical Development Department, 540306 Targu Mures, Romania
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, 1083 Budapest, Hungary
| | - Melinda Urkon
- Department of Pharmacology and Clinical Pharmacy, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 540142 Targu Mures, Romania
| | - Arnold Zöldhegyi
- Molnár-Institute for Applied Chromatography, 10407 Berlin, Germany
| | - Emese Sipos
- Department of Pharmaceutical Industry and Management, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 540142 Targu Mures, Romania
| | - Zoltán-István Szabó
- Department of Pharmaceutical Industry and Management, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 540142 Targu Mures, Romania
- Sz-imfidum Ltd., 525401 Lunga, Romania
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Molnár A, Knapp DG, Lovas M, Tóth G, Boldizsár I, Váczy KZ, Kovács GM. Untargeted metabolomic analyses support the main phylogenetic groups of the common plant-associated Alternaria fungi isolated from grapevine (Vitis vinifera). Sci Rep 2023; 13:19298. [PMID: 37935846 PMCID: PMC10630412 DOI: 10.1038/s41598-023-46020-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 10/26/2023] [Indexed: 11/09/2023] Open
Abstract
Alternaria, a cosmopolitan fungal genus is a dominant member of the grapevine (Vitis vinifera) microbiome. Several Alternaria species are known to produce a variety of secondary metabolites, which are particularly relevant to plant protection and food safety in field crops. According to previous findings, the majority of Alternaria species inhabiting grapevine belong to Alternaria sect. Alternaria. However, the phylogenetic diversity and secondary metabolite production of the distinct Alternaria species has remained unclear. In this study, our aim was to examine the genetic and metabolic diversity of endophytic Alternaria isolates associated with the above-ground tissues of the grapevine. Altogether, 270 Alternaria isolates were collected from asymptomatic leaves and grape clusters of different grapevine varieties in the Eger wine region of Hungary. After analyses of the nuclear ribosomal DNA internal transcribed spacer (ITS) and RNA polymerase second largest subunit (rpb2) sequences, 170 isolates were chosen for further analyses. Sequences of the Alternaria major allergen gene (Alt a 1), endopolygalacturonase (endoPG), OPA10-2, and KOG1058 were also included in the phylogenetic analyses. Identification of secondary metabolites and metabolite profiling of the isolates were performed using high-performance liquid chromatography (HPLC)-high-resolution tandem mass spectrometry (HR-MS/MS). The multilocus phylogeny results revealed two distinct groups in grapevine, namely A. alternata and the A. arborescens species complex (AASC). Eight main metabolites were identified in all collected Alternaria isolates, regardless of their affiliation to the species and lineages. Multivariate analyses of untargeted metabolites found no clear separations; however, a partial least squares-discriminant analysis model was able to successfully discriminate between the metabolic datasets from isolates belonging to the AASC and A. alternata. By conducting univariate analysis based on the discriminant ability of the metabolites, we also identified several features exhibiting large and significant variation between A. alternata and the AASC. The separation of these groups may suggest functional differences, which may also play a role in the functioning of the plant microbiome.
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Affiliation(s)
- Anna Molnár
- Centre for Research and Development, Eszterházy Károly Catholic University, Leányka utca 6, Eger, 3300, Hungary.
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary.
| | - Dániel G Knapp
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary
- Department of Forestry and Wood Technology, Linnaeus University, Växjö, Sweden
| | - Miklós Lovas
- Centre for Research and Development, Eszterházy Károly Catholic University, Leányka utca 6, Eger, 3300, Hungary
| | - Gergő Tóth
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre U. 9, Budapest, 1092, Hungary
| | - Imre Boldizsár
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary
- Department of Pharmacognosy, Semmelweis University, Üllői út 26, Budapest, 1085, Hungary
| | - Kálmán Zoltán Váczy
- Centre for Research and Development, Eszterházy Károly Catholic University, Leányka utca 6, Eger, 3300, Hungary
| | - Gábor M Kovács
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary
- Plant Protection Institute, Centre for Agricultural Research, Budapest, 1525, Hungary
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7
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Dobó M, Ádám M, Fiser B, Papp LA, Dombi G, Sekkoum K, Szabó ZI, Tóth G. Enantioseparation and molecular docking study of selected chiral pharmaceuticals on a commercialized phenylcarbamate-β-cyclodextrin column using polar organic mode. Sci Rep 2023; 13:14778. [PMID: 37679395 PMCID: PMC10485059 DOI: 10.1038/s41598-023-41941-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 09/04/2023] [Indexed: 09/09/2023] Open
Abstract
The chiral separation capability of Chiral-CD-Ph column, containing phenylcarbamate-β-cyclodextrin as the chiral selector in polar organic mode was investigated. A total of twenty-five compounds with different structures and acid-base properties were evaluated, and twenty of them were separated using acetonitrile or methanol as eluent. The effects of various chromatographic parameters, such as the type and proportion of organic modifier, flow rate, and column temperature were analyzed in detail in relation to chromatographic performance. A U-shape retention curve was observed when a mixture of acetonitrile and methanol was used as the eluent, indicating different types of interactions in different solvent mixtures. Van 't Hoff analysis was used for calculation of thermodynamic parameters which revealed that the enantioseparation is mainly enthalpy controlled; however, entropic control was also observed. The enantiomer recognition ability at the atomic level was also investigated through a molecular docking study, which revealed surface binding in polar organic mode instead of inclusion complexation. Our work proves that the phenylcarbamate-β-cyclodextrin-based chiral stationary phase can be effectively used in polar organic mode for the chiral separation of structurally diverse compounds. Furthermore, it is important to note that our study demonstrated that surface binding is responsible for the formation of supramolecular complexes in certain cyclodextrin derivatives.
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Affiliation(s)
- Máté Dobó
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes E. u. 9, 1092, Budapest, Hungary
| | - Márk Ádám
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes E. u. 9, 1092, Budapest, Hungary
| | - Béla Fiser
- Higher Education and Industrial Cooperation Centre, University of Miskolc, Egyetemváros, 3515, Miskolc, Hungary
- Ferenc Rakoczi II Transcarpathian Hungarian College of Higher Education, Beregszász, Transcarpathia, Ukraine
- Department of Physical Chemistry, Faculty of Chemistry, University of Lodz, 90-149, Łódź, Poland
| | - Lajos Attila Papp
- Department of Pharmaceutical and Therapeutic Chemistry, George Emil Palade University of Medicine, Pharmacy, Science and Technology of Târgu Mures, Târgu Mureş, Romania
| | - Gergely Dombi
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes E. u. 9, 1092, Budapest, Hungary
| | - Khaled Sekkoum
- Bioactive Molecules and Chiral Separation Laboratory, Faculty of Exacte Sciences, University Tahri Mohamed of Bechar, PO Box 417, 08000, Bechar, Algeria
| | - Zoltán-István Szabó
- Department of Drugs Industry and Pharmaceutical Management, George Emil Palade University of Medicine, Pharmacy, Science and Technology of Târgu Mures, Târgu Mureş, Romania
- Sz-Imfidum Ltd., 525401, Lunga, Romania
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes E. u. 9, 1092, Budapest, Hungary.
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Szabó ZI, Boda F, Fiser B, Dobó M, Szőcs L, Tóth G. Chiral Separation of Oxazolidinone Analogs by Capillary Electrophoresis Using Anionic Cyclodextrins as Chiral Selectors: Emphasis on Enantiomer Migration Order. Molecules 2023; 28:molecules28114530. [PMID: 37299005 DOI: 10.3390/molecules28114530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 05/28/2023] [Accepted: 06/01/2023] [Indexed: 06/12/2023] Open
Abstract
Comparative chiral separations of enantiomeric pairs of four oxazolidinone and two related thio-derivatives were performed by capillary electrophoresis, using cyclodextrins (CDs) as chiral selectors. Since the selected analytes are neutral, the enantiodiscrimination capabilities of nine anionic CD derivatives were determined, in 50 mM phosphate buffer pH = 6. Unanimously, the most successful chiral selector was the single isomeric heptakis-(6-sulfo)-β-cyclodextrin (HS-β-CD), which resulted in the highest enantioresolution values out of the CDs applied for five of the six enantiomeric pairs. The enantiomer migration order (EMO) was the same for two enantiomeric pairs, irrespective of the CD applied. However, several examples of EMO reversals were obtained in the other cases. Interestingly, changing from randomly substituted, multi-component mixtures of sulfated-β-CD to the single isomeric chiral selector, enantiomer migration order reversal occurred for two enantiomeric pairs and similar observations were made when comparing heptakis-(2,3-di-O-methyl-6-O-sulfo)-β-CD, (HDMS-β-CD) with HS-β-CD. In several cases, cavity-size-dependent, and substituent-dependent EMO reversals were also observed. Minute differences in the structure of the analytes were also responsible for several cases of EMO reversal. The present study offers a complex overview of the chiral separation of structurally related oxazolidinones, and thio-analogs, highlighting the importance of the adequate choice of chiral selector in this group of compounds, where enantiomeric purity is of utmost importance.
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Affiliation(s)
- Zoltán-István Szabó
- Faculty of Pharmacy, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, Gh. Marinescu 38, 540139 Târgu Mureș, Romania
- Sz-imfidum Ltd., Lunga nr. 504, 525401 Covasna, Romania
| | - Francisc Boda
- Faculty of Pharmacy, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, Gh. Marinescu 38, 540139 Târgu Mureș, Romania
| | - Béla Fiser
- Higher Education and Industrial Cooperation Centre, University of Miskolc, Egyetemváros, H-3515 Miskolc, Hungary
- Ferenc Rákóczi II. Transcarpathian Hungarian Institute, 90200 Beregszász, Transcarpathia, Ukraine
- Department of Physical Chemistry, Faculty of Chemistry, University of Lodz, 90-149 Łódź, Poland
| | - Máté Dobó
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes E. 9, H-1085 Budapest, Hungary
| | - Levente Szőcs
- Cyclolab Ltd., Illatos út 7, H-1097 Budapest, Hungary
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes E. 9, H-1085 Budapest, Hungary
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9
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Tóth G, Horváti K, Kraszni M, Ausbüttel T, Pályi B, Kis Z, Mucsi Z, Kovács GM, Bősze S, Boldizsár I. Arylnaphthalene Lignans with Anti-SARS-CoV-2 and Antiproliferative Activities from the Underground Organs of Linum austriacum and Linum perenne. J Nat Prod 2023; 86:672-682. [PMID: 36857518 PMCID: PMC10005813 DOI: 10.1021/acs.jnatprod.2c00580] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Indexed: 06/18/2023]
Abstract
Diphyllin (1) and justicidin B (2) are arylnaphthalene lignans with antiviral and antiproliferative effects. Compound 1 is also known as an effective inhibitor of the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). To evaluate the in vitro antiviral and cytotoxic potency of both lignans in SARS-CoV-2 -infected cells and various cancer cell lines, respectively, 1 and 2 were isolated from the underground organs of Linum austriacum and Linum perenne. Two previously undescribed arylnaphthalene lignans, denominated linadiacin A and B (3 and 4), were also isolated and identified. In acidic media, 3 was converted by a two-step reaction into 2 via the intermediate 4. Optimum acid treatment conditions were determined to isolate lignans by one-step preparative high-performance liquid chromatography (HPLC). The results of the conversion, HPLC-tandem mass spectrometry, nuclear magnetic resonance spectroscopy, and molecular modeling studies allowed complete structure analysis. Compounds 1 and 2 were the most effective against SARS-CoV-2 with a 3-log reduction in the viral copy number at a 12.5 μM concentration. Ten human cancer cell lines showed sensitivity to at least one of the isolated lignans.
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Affiliation(s)
- Gergő Tóth
- Department of Pharmaceutical Chemistry,
Semmelweis University, Hőgyes Endre u. 9, Budapest
1092, Hungary
| | - Kata Horváti
- MTA-TTK Lendület “Momentum”
Peptide-Based Vaccines Research Group, Institute of Materials and Environmental Chemistry,
Research Centre for Natural Sciences, Magyar Tudósok
krt 2, Budapest 1117, Hungary
| | - Márta Kraszni
- Department of Pharmaceutical Chemistry,
Semmelweis University, Hőgyes Endre u. 9, Budapest
1092, Hungary
| | - Tim Ausbüttel
- Department of Pharmacognosy, Semmelweis
University, Üllői út 26, Budapest 1085,
Hungary
- Department of Plant Anatomy, Institute of Biology,
Eötvös Loránd University,
Pázmány Péter sétány 1/C, Budapest 1117,
Hungary
| | - Bernadett Pályi
- National Biosafety Laboratory, National
Public Health Center, Albert Flórián út 2-6, Budapest
1097, Hungary
| | - Zoltán Kis
- National Biosafety Laboratory, National
Public Health Center, Albert Flórián út 2-6, Budapest
1097, Hungary
| | - Zoltán Mucsi
- Femtonics Ltd.,
Tűzoltó u. 59, Budapest 1094, Hungary
| | - Gábor M. Kovács
- Department of Plant Anatomy, Institute of Biology,
Eötvös Loránd University,
Pázmány Péter sétány 1/C, Budapest 1117,
Hungary
| | - Szilvia Bősze
- National Biosafety Laboratory, National
Public Health Center, Albert Flórián út 2-6, Budapest
1097, Hungary
- ELKH-ELTE Research Group of Peptide Chemistry,
Eötvös Loránd Research Network (ELKH),
Eötvös Loránd University, Pázmány
Péter sétány 1/A, Budapest 1117, Hungary
| | - Imre Boldizsár
- Department of Pharmacognosy, Semmelweis
University, Üllői út 26, Budapest 1085,
Hungary
- Department of Plant Anatomy, Institute of Biology,
Eötvös Loránd University,
Pázmány Péter sétány 1/C, Budapest 1117,
Hungary
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10
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Szabó ZI, Benkő BM, Bartalis-Fábián Á, Iványi R, Varga E, Szőcs L, Tóth G. Chiral Separation of Apremilast by Capillary Electrophoresis Using Succinyl-β-Cyclodextrin-Reversal of Enantiomer Elution Order by Cationic Capillary Coating. Molecules 2023; 28:molecules28083310. [PMID: 37110544 PMCID: PMC10143784 DOI: 10.3390/molecules28083310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 04/03/2023] [Accepted: 04/07/2023] [Indexed: 04/29/2023] Open
Abstract
A stereospecific capillary electrophoresis method was developed for the separation of the novel, antipsoriatic agent, apremilast (APR). Six anionic cyclodextrin (CD) derivatives were screened for their ability to discriminate between the uncharged enantiomers. Only succinyl-β-CD (Succ-β-CD) presented chiral interactions; however, the enantiomer migration order (EMO) was unfavorable, and the eutomer, S-APR, migrated faster. Despite the optimization of all possible parameters (pH, cyclodextrin concentration, temperature, and degree of substitution of CD), the method was unsuccessful for purity control due to the low resolution and the unfavorable enantiomer migration order. Changing the direction of electroosmotic flow (EOF) by the dynamic coating of the inner surface of the capillary with poly(diallyldimethylammonium) chloride or polybrene resulted in EMO reversal, and the developed method could be applied for the determination of R-APR as the enantiomeric purity. Thus, the application of the dynamic capillary coating offers a general opportunity for enantiomeric migration order reversal in particular cases when the chiral selector is a weak acid.
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Affiliation(s)
- Zoltán-István Szabó
- Faculy of Pharmacy, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, Gh. Marinescu 38, 540139 Târgu Mureș, Romania
- Sz-Imfidum Ltd., nr. 504, 525401 Lunga, Romania
| | - Beáta-Mária Benkő
- University Pharmacy Department of Pharmaceutical Administration, Semmelweis University, Hőgyes E. 9, H-1085 Budapest, Hungary
| | - Ágnes Bartalis-Fábián
- Faculy of Pharmacy, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, Gh. Marinescu 38, 540139 Târgu Mureș, Romania
| | - Róbert Iványi
- Cyclolab Ltd., Illatos út 7, H-1097 Budapest, Hungary
| | | | - Levente Szőcs
- Cyclolab Ltd., Illatos út 7, H-1097 Budapest, Hungary
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes E. 9, H-1085 Budapest, Hungary
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11
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Dombi G, Horváth P, Fiser B, Mirzahosseini A, Dobó M, Szabó ZI, Tóth G. Enantioselective Human Serum Albumin Binding of Apremilast: Liquid Chromatographic, Fluorescence and Molecular Docking Study. Int J Mol Sci 2023; 24:ijms24032168. [PMID: 36768492 PMCID: PMC9916978 DOI: 10.3390/ijms24032168] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 01/13/2023] [Accepted: 01/19/2023] [Indexed: 01/24/2023] Open
Abstract
The interaction between human serum albumin (HSA) and apremilast (APR), a novel antipsoriatic drug, was characterized by multimodal analytical techniques including high-performance liquid chromatography (HPLC), fluorescence spectroscopy and molecular docking for the first time. Using an HSA chiral stationary phase, the APR enantiomers were well separated, indicating enantioselective binding between the protein and the analytes. The influence of chromatographic parameters-type and concentration of the organic modifier, buffer type, pH, ionic strength of the mobile phase, flow rate and column temperature-on the chromatographic responses (retention factor and selectivity) was analyzed in detail. The results revealed that the eutomer S-APR bound to the protein to a greater extent than the antipode. The classical van 't Hoff method was applied for thermodynamic analysis, which indicated that the enantioseparation was enthalpy-controlled. The stability constants of the protein-enantiomer complexes, determined by fluorescence spectroscopy, were in accordance with the elution order observed in HPLC (KR-APR-HSA = 6.45 × 103 M-1, KS-APR-HSA = 1.04 × 104 M-1), showing that, indeed, the later-eluting S-APR displayed a stronger binding with HSA. Molecular docking was applied to study and analyze the interactions between HSA and the APR enantiomers at the atomic level. It was revealed that the most favored APR binding occurred at the border between domains I and II of HSA, and secondary interactions were responsible for the different binding strengths of the enantiomers.
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Affiliation(s)
- Gergely Dombi
- Department of Pharmaceutical Chemistry, Semmelweis University, H-1085 Budapest, Hungary
| | - Péter Horváth
- Department of Pharmaceutical Chemistry, Semmelweis University, H-1085 Budapest, Hungary
| | - Béla Fiser
- Higher Education and Industrial Cooperation Centre, University of Miskolc, Egyetemváros, H-3515 Miskolc, Hungary
- Department of Biology and Chemistry, Ferenc Rakoczi II Transcarpathian Hungarian College of Higher Education, Transcarpathia, 90200 Beregszasz, Ukraine
- Department of Physical Chemistry, Faculty of Chemistry, University of Lodz, 90-149 Łódź, Poland
| | - Arash Mirzahosseini
- Department of Pharmaceutical Chemistry, Semmelweis University, H-1085 Budapest, Hungary
| | - Máté Dobó
- Department of Pharmaceutical Chemistry, Semmelweis University, H-1085 Budapest, Hungary
| | - Zoltán-István Szabó
- Department of Pharmaceutical Industry and Management, Faculty of Pharmacy, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 540142 Targu Mures, Romania
- Sz-imfidum Ltd., 525401 Lunga, Romania
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, H-1085 Budapest, Hungary
- Correspondence:
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12
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Szabó ZI, Bartalis-Fábián Á, Tóth G. Simultaneous Determination of Escitalopram Impurities including the R-enantiomer on a Cellulose tris(3,5-Dimethylphenylcarbamate)-Based Chiral Column in Reversed-Phase Mode. Molecules 2022; 27:molecules27249022. [PMID: 36558157 PMCID: PMC9783879 DOI: 10.3390/molecules27249022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 12/13/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Abstract
A high-performance liquid chromatographic method was developed for the simultaneous determination of the related substances-three potential synthesis-related chemical impurities and the distomer-of escitalopram. The separation capacity of seven different polysaccharide-type chiral columns, including three amylose-based (Lux Amylose-1, Lux i-Amylose-1, Lux Amylose-2) and four cellulose-based columns (Lux Cellulose-1, Lux Cellulose-2, Lux Cellulose-3, and Lux Cellulose-4) were screened in the polar organic and reversed-phase modes. Lux Cellulose-1, based on cellulose tris(3,5-dimethylphenylcarbamate) as the chiral selector with an acetonitrile-water mixture containing 0.1% diethylamine was identified as the most promising separation system. Using the "one factor at a time" optimization approach, the effect of column temperature, flow rate, and mobile phase constituents on separation performance was evaluated, and the critical resolution values were determined. A U-shaped retention pattern was obtained when plotting the retention factors of the citalopram enantiomers versus the water content of the binary mobile phases on the Lux Cellulose-1 column. A thermodynamic analysis revealed enthalpy-driven enantioseparation in both the polar organic and reversed-phase modes. For further method optimizations, an L9 orthogonal array table was employed. Using the optimized parameters (Lux Cellulose-1 column with 0.1% (v/v) diethylamine in water/acetonitrile 55/45 (v/v); 0.8 mL/min flow rate at 25 °C), baseline separations were achieved between all compounds. Our newly developed HPLC method was validated according to the ICH guidelines and its application was tested with a commercially available pharmaceutical formulation. The method proved to be suitable for routine quality control of related substances and the enantiomeric purity of escitalopram.
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Affiliation(s)
- Zoltán-István Szabó
- Department of Pharmaceutical Industry and Management, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, Gh. Marinescu 38, 540139 Targu Mures, Romania
- Sz-Imfidum Ltd., Lunga nr. 504, 525401 Covasna, Romania
- Correspondence: ; Tel.: +40-744231522
| | - Ágnes Bartalis-Fábián
- Department of Pharmaceutical Industry and Management, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, Gh. Marinescu 38, 540139 Targu Mures, Romania
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, H-1085 Budapest, Hungary
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13
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Háhn J, Kriszt B, Tóth G, Jiang D, Fekete M, Szabó I, Göbölös B, Urbányi B, Szoboszlay S, Kaszab E. Glyphosate and glyphosate-based herbicides (GBHs) induce phenotypic imipenem resistance in Pseudomonas aeruginosa. Sci Rep 2022; 12:18258. [PMID: 36309535 PMCID: PMC9617868 DOI: 10.1038/s41598-022-23117-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 10/25/2022] [Indexed: 12/31/2022] Open
Abstract
GBHs are the most widely used herbicides for weed control worldwide that potentially affect microorganisms, but the role of their sublethal exposure in the development of antibiotic resistance of Pseudomonas aeruginosa is still not fully investigated. Here, the effects of glyphosate acid (GLY), five glyphosate-based herbicides (GBHs), and POE(15), a formerly used co-formulant, on susceptibility to imipenem, a potent carbapenem-type antibiotic, in one clinical and four non-clinical environmental P. aeruginosa isolates were studied. Both pre-exposure in broth culture and co-exposure in solid media of the examined P. aeruginosa strains with 0.5% GBHs resulted in a decreased susceptibility to imipenem, while other carbapenems (doripenem and meropenem) retained their effectiveness. Additionally, the microdilution chequerboard method was used to examine additive/antagonistic/synergistic effects between GLY/POE(15)/GBHs and imipenem by determining the fractional inhibitory concentration (FIC) indexes. Based on the FIC index values, glyphosate acid and Total demonstrated a potent antagonistic effect in all P. aeruginosa strains. Dominator Extra 608 SL and Fozat 480 reduced the activity of imipenem in only one strain (ATCC10145), while POE(15) and three other GBHs did not have any effect on susceptibility to imipenem. Considering the simultaneous presence of GBHs and imipenem in various environmental niches, the detected interactions between these chemicals may affect microbial communities. The mechanisms of the glyphosate and GBH-induced imipenem resistance in P. aeruginosa are yet to be investigated.
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Affiliation(s)
- Judit Háhn
- grid.129553.90000 0001 1015 7851Department of Environmental Safety, Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, Gödöllő, Hungary
| | - Balázs Kriszt
- grid.129553.90000 0001 1015 7851Department of Environmental Safety, Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, Gödöllő, Hungary
| | - Gergő Tóth
- grid.129553.90000 0001 1015 7851Department of Environmental Safety, Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, Gödöllő, Hungary
| | - Dongze Jiang
- grid.129553.90000 0001 1015 7851Department of Environmental Safety, Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, Gödöllő, Hungary
| | - Márton Fekete
- grid.129553.90000 0001 1015 7851Department of Environmental Safety, Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, Gödöllő, Hungary
| | - István Szabó
- grid.129553.90000 0001 1015 7851Department of Environmental Toxicology, Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, Gödöllő, Hungary
| | - Balázs Göbölös
- grid.129553.90000 0001 1015 7851Department of Environmental Safety, Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, Gödöllő, Hungary
| | - Béla Urbányi
- grid.129553.90000 0001 1015 7851Department of Aquaculture, Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, Gödöllő, Hungary
| | - Sándor Szoboszlay
- grid.129553.90000 0001 1015 7851Department of Environmental Safety, Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, Gödöllő, Hungary
| | - Edit Kaszab
- grid.129553.90000 0001 1015 7851Department of Environmental Safety, Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, Gödöllő, Hungary
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14
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Kádár S, Csicsák D, Tőzsér P, Farkas A, Pálla T, Mirzahosseini A, Tóth B, Tóth G, Fiser B, Horváth P, Madarász J, Avdeef A, Takács-Novák K, Sinkó B, Borbás E, Völgyi G. Understanding the pH Dependence of Supersaturation State-A Case Study of Telmisartan. Pharmaceutics 2022; 14:pharmaceutics14081635. [PMID: 36015261 PMCID: PMC9412861 DOI: 10.3390/pharmaceutics14081635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 07/29/2022] [Accepted: 08/02/2022] [Indexed: 11/23/2022] Open
Abstract
Creating supersaturating drug delivery systems to overcome the poor aqueous solubility of active ingredients became a frequent choice for formulation scientists. Supersaturation as a solution phenomenon is, however, still challenging to understand, and therefore many recent publications focus on this topic. This work aimed to investigate and better understand the pH dependence of supersaturation of telmisartan (TEL) at a molecular level and find a connection between the physicochemical properties of the active pharmaceutical ingredient (API) and the ability to form supersaturated solutions of the API. Therefore, the main focus of the work was the pH-dependent thermodynamic and kinetic solubility of the model API, TEL. Based on kinetic solubility results, TEL was observed to form a supersaturated solution only in the pH range 3–8. The experimental thermodynamic solubility-pH profile shows a slight deviation from the theoretical Henderson–Hasselbalch curve, which indicates the presence of zwitterionic aggregates in the solution. Based on pKa values and the refined solubility constants and distribution of macrospecies, the pH range where high supersaturation-capacity is observed is the same where the zwitterionic form of TEL is present. The existence of zwitterionic aggregation was confirmed experimentally in the pH range of 3 to 8 by mass spectrometry.
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Affiliation(s)
- Szabina Kádár
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 3 Műegyetem rkp., 1111 Budapest, Hungary
| | - Dóra Csicsák
- Department of Pharmaceutical Chemistry, Semmelweis University, 9 Hőgyes Endre Street, 1092 Budapest, Hungary
| | - Petra Tőzsér
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 3 Műegyetem rkp., 1111 Budapest, Hungary
| | - Attila Farkas
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 3 Műegyetem rkp., 1111 Budapest, Hungary
| | - Tamás Pálla
- Department of Pharmaceutical Chemistry, Semmelweis University, 9 Hőgyes Endre Street, 1092 Budapest, Hungary
| | - Arash Mirzahosseini
- Department of Pharmaceutical Chemistry, Semmelweis University, 9 Hőgyes Endre Street, 1092 Budapest, Hungary
| | - Blanka Tóth
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Műegyetem rkp. 3, 1111 Budapest, Hungary
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, 9 Hőgyes Endre Street, 1092 Budapest, Hungary
| | - Béla Fiser
- Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, 3515 Miskolc, Hungary
- Ferenc Rákóczi II Transcarpathian Hungarian College of Higher Education, 90200 Berehove, Ukraine
| | - Péter Horváth
- Department of Pharmaceutical Chemistry, Semmelweis University, 9 Hőgyes Endre Street, 1092 Budapest, Hungary
| | - János Madarász
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Műegyetem rkp. 3, 1111 Budapest, Hungary
| | - Alex Avdeef
- In-ADME Research, 1732 First Ave., #102, New York, NY 10128, USA
| | - Krisztina Takács-Novák
- Department of Pharmaceutical Chemistry, Semmelweis University, 9 Hőgyes Endre Street, 1092 Budapest, Hungary
| | - Bálint Sinkó
- Pion Inc., 10 Cook Street, Billerica, MA 01821, USA
| | - Enikő Borbás
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 3 Műegyetem rkp., 1111 Budapest, Hungary
- Correspondence: (E.B.); (G.V.)
| | - Gergely Völgyi
- Department of Pharmaceutical Chemistry, Semmelweis University, 9 Hőgyes Endre Street, 1092 Budapest, Hungary
- Correspondence: (E.B.); (G.V.)
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15
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Gessler T, Tóth G, Wachs J. No Country for Asylum Seekers? How Short-Term Exposure to Refugees Influences Attitudes and Voting Behavior in Hungary. Polit Behav 2022; 44:1813-1841. [PMID: 36415509 PMCID: PMC9674742 DOI: 10.1007/s11109-021-09682-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/21/2021] [Indexed: 05/10/2023]
Abstract
How does exposure to refugees influence political behavior? We present evidence from Hungary, a country with widespread anti-immigration attitudes, that short term exposure during the 2015 refugee crisis predicts anti-refugee voting and sentiment. We code exposure to refugees at the settlement level using reports from state media, an independent online news site, and an online social media aggregator. Settlements through which refugees traveled showed significantly higher anti-refugee voting in a national referendum in 2016. The effect decreases sharply with distance. Using a difference-in-differences model, we find that the far-right opposition gained, while the governing right-wing party lost votes in these settlements in subsequent parliamentary elections. This suggests incumbents are punished by voters skeptical of immigration regardless of their policy position. Survey data supports this finding of a competition among right-wing parties, as individuals in exposed settlements are more fearful of immigrants and support restrictive policies only if they identify as right-wing.
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Affiliation(s)
- Theresa Gessler
- Department of Political Science, University of Zurich, Zurich, Switzerland
| | - Gergő Tóth
- Spatial Dynamics Lab, University College Dublin, Dublin, Ireland
- Agglomeration and Social Networks Research Lab, Centre for Economic and Regional Studies, Budapest, Hungary
| | - Johannes Wachs
- Institute for Data, Process and Knowledge Management, Vienna University of Economics and Business, Vienna, Austria
- Complexity Science Hub Vienna, Vienna, Austria
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16
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Kaszab E, Radó J, Kriszt B, Pászti J, Lesinszki V, Szabó A, Tóth G, Khaledi A, Szoboszlay S. Groundwater, soil and compost, as possible sources of virulent and antibiotic-resistant Pseudomonas aeruginosa. Int J Environ Health Res 2021; 31:848-860. [PMID: 31736330 DOI: 10.1080/09603123.2019.1691719] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 11/07/2019] [Indexed: 06/10/2023]
Abstract
Pseudomonas aeruginosa is a major public health concern all around the world. In the frame of this work, a set of diverse environmental P. aeruginosa isolates with various antibiotic resistance profiles were examined in a Galleria mellonella virulence model. Motility, serotypes, virulence factors and biofilm-forming ability were also examined. Molecular types were determined by pulsed-field gel electrophoresis (PFGE). Based on our results, the majority of environmental isolates were virulent in the G. mellonella test and twitching showed a positive correlation with mortality. Resistance against several antibiotic agents such as Imipenem correlated with a lower virulence in the applied G. mellonella model. PFGE revealed that five examined environmental isolates were closely related to clinically detected pulsed-field types. Our study demonstrated that industrial wastewater effluents, composts, and hydrocarbon-contaminated sites should be considered as hot spots of high-risk clones of P. aeruginosa.
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Affiliation(s)
- Edit Kaszab
- Department of Environmental Safety and Ecotoxicology, Szent István University, Gödöllő, Hungary
| | - Júlia Radó
- Department of Environmental Safety and Ecotoxicology, Szent István University, Gödöllő, Hungary
| | - Balázs Kriszt
- Department of Environmental Safety and Ecotoxicology, Szent István University, Gödöllő, Hungary
| | - Judit Pászti
- Department of Phage Typing and Molecular Epidemiology, National Center for Epidemiology, Budapest, Hungary
| | - Virág Lesinszki
- Department of Phage Typing and Molecular Epidemiology, National Center for Epidemiology, Budapest, Hungary
| | - Adám Szabó
- Centre for Experimental and Clinical Infection Research, Institute for Molecular Bacteriology TWINCORE, Hannover, Germany
| | - Gergő Tóth
- Department of Environmental Safety and Ecotoxicology, Szent István University, Gödöllő, Hungary
| | - Ariane Khaledi
- Department of Molecular Bacteriology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Sándor Szoboszlay
- Department of Environmental Safety and Ecotoxicology, Szent István University, Gödöllő, Hungary
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17
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Berek-Nagy PJ, Tóth G, Bősze S, Horváth LB, Darcsi A, Csíkos S, Knapp DG, Kovács GM, Boldizsár I. The grass root endophytic fungus Flavomyces fulophazii: An abundant source of tetramic acid and chlorinated azaphilone derivatives. Phytochemistry 2021; 190:112851. [PMID: 34217043 DOI: 10.1016/j.phytochem.2021.112851] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 06/17/2021] [Indexed: 06/13/2023]
Abstract
Fungal endophytes are remarkable sources of biologically active metabolites of ecological and pharmacological significance. In this study, fungal isolates producing yellow pigments and originating from grass roots, were identified as the recently described grass root colonizing dark septate endophyte (DSE), Flavomyces fulophazii (Periconiaceae, Pleosporales). While analyzing the metabolite composition of 17 isolates of this fungus, 11 previously undescribed compounds, including four tetramic acids (dihydroxyvermelhotin, hydroxyvermelhotin, methoxyvermelhotin, oxovermelhotin), and seven chlorinated azaphilones (flavochlorines A-G), together with the known tetramic acid vermelhotin, were tentatively identified by high performance liquid chromatography (HPLC)-tandem mass spectrometry (MS/MS). Among them, flavochlorine A, flavochlorine G, hydroxyvermelhotin and vermelhotin could be isolated by preparative HPLC, thus their structures were also confirmed by nuclear magnetic resonance (NMR) spectroscopy. Vermelhotin was found to be the main compound, reaching its maximum level of 5.5 mg/g in the in vitro cultures of a selected F. fulophazii isolate. A significant amount of vermelhotin was isolated by preparative HPLC from these cultures (4.8 mg from 1.0 g lyophilized culture), confirming the practical utility of F. fulophazii in high-yield vermelhotin production. The main compounds of this endophyte expressed no activity in standardized plant bioassays (i.e., in the Lactuca sativa seed germination and Lemna minor growth tests). An antiproliferative study of the isolated compounds confirmed moderate activity of vermelhotin against a panel of twelve cancer cell lines, with IC50 ranges of 10.1-37.0 μM, without inhibiting the non-cancer Vero cells, suggesting its selectivity towards cancers.
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Affiliation(s)
- Péter János Berek-Nagy
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary; National Public Health Center, Albert Flórián út 2-6, Budapest, 1097, Hungary
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre u. 9, Budapest, 1092, Hungary
| | - Szilvia Bősze
- National Public Health Center, Albert Flórián út 2-6, Budapest, 1097, Hungary; Research Group of Peptide Chemistry, Eötvös Loránd University, Eötvös Loránd Research Network (ELKH), Pázmány Péter sétány 1/A, Budapest, 1117, Hungary
| | - Lilla Borbála Horváth
- National Public Health Center, Albert Flórián út 2-6, Budapest, 1097, Hungary; Research Group of Peptide Chemistry, Eötvös Loránd University, Eötvös Loránd Research Network (ELKH), Pázmány Péter sétány 1/A, Budapest, 1117, Hungary
| | - András Darcsi
- National Institute of Pharmacy and Nutrition, Zrínyi u. 3, Budapest, 1051, Hungary
| | - Sándor Csíkos
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary; National Public Health Center, Albert Flórián út 2-6, Budapest, 1097, Hungary
| | - Dániel G Knapp
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary
| | - Gábor M Kovács
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary
| | - Imre Boldizsár
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary.
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18
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Fejős I, Tóth G, Várnai B, Szabó ZI, Köteles I, Malanga M, Béni S. Enantioseparation of solriamfetol and its major impurity phenylalaninol by capillary electrophoresis using sulfated gamma cyclodextrin. Electrophoresis 2021; 42:1818-1825. [PMID: 34109644 DOI: 10.1002/elps.202100076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 06/01/2021] [Accepted: 06/04/2021] [Indexed: 11/11/2022]
Abstract
R-solriamfetol is a recently approved drug used for the treatment of excessive sleepiness associated with narcolepsy and sleep apnea. Herein, a capillary electrophoretic method was developed, enabling the simultaneous analysis of the API and its S-enantiomer in addition to the enantiomers of its major impurity phenylalaninol. Twenty-nine different cyclodextrins (CDs), including native, neutral, and charged ones were screened as potential chiral selectors, and the best results were obtained with sulfated CDs. Randomly sulfated-β-CD exhibited outstanding enantioresolution, the peaks of phenylalaninol enantiomers inserted between the two peaks of solriamfetol enantiomers, while sulfated-γ-CD (S-γ-CD) showed remarkable resolution values in a much shorter analysis time with the optimal enantiomer migration order. Among the single isomer sulfated CD derivatives, substituent dependent enantiomer migration order reversal could also be observed in the case of heptakis(6-O-sulfo)-β-CD (HS-β-CD) or heptakis(2,3-O-dimethyl-6-O-sulfo)-β-CD (HDMS-β-CD) with R-,S-solriamfetol, and heptakis(2,3-O-diacetyl-6-O-sulfo)-β-CD (HDAS-β-CD) resulting S-,R-solriamfetol migration order. The sulfated-γ-CD system was chosen for method optimization applying orthogonal experimental design. The optimized method (45 mM Tris-acetate buffer, pH 4.5, 4 mM S-γ-CD, 21°C, +19.5 kV) was capable for the baseline separation of solriamfetol and phenylalaninol enantiomers within 7 min. The optimized method was validated according to the ICH guidelines and successfully applied for the analysis of pharmaceutical preparation (Sunosi® 75 mg tablet), thus it may serve as a routine procedure for the laboratories of regulatory authorities as well as in Pharmacopoeias.
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Affiliation(s)
- Ida Fejős
- Department of Pharmacognosy, Semmelweis University, Budapest, Hungary
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, Budapest, Hungary
| | - Bianka Várnai
- Department of Pharmacognosy, Semmelweis University, Budapest, Hungary
| | - Zoltán István Szabó
- Department of Pharmaceutical Industry and Management, George Emil Palad University of Medicine, Pharmacy, Science, and Technology of Targu Mures, Targu Mures, Romania
| | - István Köteles
- Department of Pharmaceutical Chemistry, Semmelweis University, Budapest, Hungary
| | - Milo Malanga
- CycloLab, Cyclodextrin R&D Ltd, Budapest, Hungary
| | - Szabolcs Béni
- Department of Pharmacognosy, Semmelweis University, Budapest, Hungary
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19
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Ruksakiet K, Stercz B, Tóth G, Jaikumpun P, Gróf I, Tengölics R, Lohinai ZM, Horváth P, Deli MA, Steward MC, Dobay O, Zsembery Á. Bicarbonate Evokes Reciprocal Changes in Intracellular Cyclic di-GMP and Cyclic AMP Levels in Pseudomonas aeruginosa. Biology (Basel) 2021; 10:biology10060519. [PMID: 34200909 PMCID: PMC8230467 DOI: 10.3390/biology10060519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/04/2021] [Accepted: 06/08/2021] [Indexed: 11/23/2022]
Abstract
The formation of Pseudomonas aeruginosa biofilms in cystic fibrosis (CF) is one of the most common causes of morbidity and mortality in CF patients. Cyclic di-GMP and cyclic AMP are second messengers regulating the bacterial lifestyle transition in response to environmental signals. We aimed to investigate the effects of extracellular pH and bicarbonate on intracellular c-di-GMP and cAMP levels, and on biofilm formation. P. aeruginosa was inoculated in a brain−heart infusion medium supplemented with 25 and 50 mM NaCl in ambient air (pH adjusted to 7.4 and 7.7 respectively), or with 25 and 50 mM NaHCO3 in 5% CO2 (pH 7.4 and 7.7). After 16 h incubation, c-di-GMP and cAMP were extracted and their concentrations determined. Biofilm formation was investigated using an xCelligence real-time cell analyzer and by crystal violet assay. Our results show that HCO3− exposure decreased c-di-GMP and increased cAMP levels in a dose-dependent manner. Biofilm formation was also reduced after 48 h exposure to HCO3−. The reciprocal changes in second messenger concentrations were not influenced by changes in medium pH or osmolality. These findings indicate that HCO3− per se modulates the levels of c-di-GMP and cAMP, thereby inhibiting biofilm formation and promoting the planktonic lifestyle of the bacteria.
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Affiliation(s)
- Kasidid Ruksakiet
- Department of Oral Biology, Semmelweis University, H-1089 Budapest, Hungary; (K.R.); (P.J.); (M.C.S.)
- Department of Conservative Dentistry, Semmelweis University, H-1085 Budapest, Hungary;
| | - Balázs Stercz
- Institute of Medical Microbiology, Faculty of Medicine, Semmelweis University, H-1089 Budapest, Hungary; (B.S.); (O.D.)
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, H-1092 Budapest, Hungary; (G.T.); (P.H.)
| | - Pongsiri Jaikumpun
- Department of Oral Biology, Semmelweis University, H-1089 Budapest, Hungary; (K.R.); (P.J.); (M.C.S.)
| | - Ilona Gróf
- Institute of Biophysics, Biological Research Centre, H-6726 Szeged, Hungary; (I.G.); (M.A.D.)
| | - Roland Tengölics
- Institute of Biochemistry, Biological Research Centre, H-6726 Szeged, Hungary;
- HCEMM-BRC Metabolic Systems Biology Laboratory, H-6726 Szeged, Hungary
| | - Zsolt M. Lohinai
- Department of Conservative Dentistry, Semmelweis University, H-1085 Budapest, Hungary;
| | - Péter Horváth
- Department of Pharmaceutical Chemistry, Semmelweis University, H-1092 Budapest, Hungary; (G.T.); (P.H.)
| | - Mária A. Deli
- Institute of Biophysics, Biological Research Centre, H-6726 Szeged, Hungary; (I.G.); (M.A.D.)
| | - Martin C. Steward
- Department of Oral Biology, Semmelweis University, H-1089 Budapest, Hungary; (K.R.); (P.J.); (M.C.S.)
- School of Medical Sciences, University of Manchester, Manchester M13 9PL, UK
| | - Orsolya Dobay
- Institute of Medical Microbiology, Faculty of Medicine, Semmelweis University, H-1089 Budapest, Hungary; (B.S.); (O.D.)
| | - Ákos Zsembery
- Department of Oral Biology, Semmelweis University, H-1089 Budapest, Hungary; (K.R.); (P.J.); (M.C.S.)
- Correspondence:
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20
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Köteles I, Mazák K, Tóth G, Horváth P, Kiss E, Tűz B, Hosztafi S. Synthesis of 3-O-Carboxyalkyl Morphine Derivatives and Characterization of Their Acid-Base Properties. Chem Biodivers 2021; 18:e2100135. [PMID: 34018677 DOI: 10.1002/cbdv.202100135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 05/18/2021] [Indexed: 11/11/2022]
Abstract
The C-3 phenolic hydroxy group containing morphine derivatives (morphine, oxymorphone, naloxone, naltrexone) are excellent candidates for the synthesis of 3-O-functionalized molecules. Achieving free carboxylic group containing derivatives gives the opportunity for further modification and conjugation that could be used for immunization and immunoassays. For this purpose ethyl bromo- and chloroacetate can be used as O-alkylating agents. Hydrolyzing the products affords the appropriate free carboxylic group containing 3-O-carboxyalkyl derivatives. As these molecules contain an acidic and a basic functional group the protonation macro- and microconstants were determined too, using pH-potentiometry and NMR-pH titration, beside fully characterizing their structure using IR, CD, NMR and HR-MS measurements.
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Affiliation(s)
- István Köteles
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre u. 9., H-1092, Budapest, Hungary
| | - Károly Mazák
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre u. 9., H-1092, Budapest, Hungary
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre u. 9., H-1092, Budapest, Hungary
| | - Péter Horváth
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre u. 9., H-1092, Budapest, Hungary
| | - Eszter Kiss
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre u. 9., H-1092, Budapest, Hungary
| | - Boglárka Tűz
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre u. 9., H-1092, Budapest, Hungary
| | - Sándor Hosztafi
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre u. 9., H-1092, Budapest, Hungary
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21
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Papp LA, Hancu G, Kelemen H, Tóth G. Chiral separation in the class of proton pump inhibitors by chromatographic and electromigration techniques: An overview. Electrophoresis 2021; 42:1761-1789. [PMID: 34004039 DOI: 10.1002/elps.202100032] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 04/27/2021] [Accepted: 05/05/2021] [Indexed: 11/08/2022]
Abstract
Proton pump inhibitors (PPIs) are benzimidazole-derivative chiral sulfoxides, frequently used in the treatment of gastric hyperacidity-related disorders. Due to their stereoselective metabolism, the eutomeric forms of PPIs can present a more advantageous pharmacokinetic profile by comparison with the distomers or racemates. Moreover, two representatives of the class are used in therapy both as racemates and as pure enantiomers (esomeprazole, dexlansoprazole). A relatively large number of enantioseparation methods employed for the stereoselective determination of PPIs from pharmaceutical, biological, and environmental matrices were published in the past three decades. The purpose of the current overview is to provide a systematic survey of the available chiral separation methods published since the introduction of PPIs in the therapy up to the present. Analytical and bioanalytical methods using different chromatographic and electromigration techniques reported for the enantioseparation of omeprazole, lansoprazole, pantoprazole, rabeprazole, ilaprazole, and tenatoprazole are included. The analytical conditions of the presented methods are summarized in three comprehensive tables, while a critical discussion of the applied techniques, possible mechanism of enantiorecognition, and future perspectives on the topic are also presented.
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Affiliation(s)
- Lajos Attila Papp
- Department of Pharmaceutical Chemistry, "George Emil Palade" University of Medicine, Pharmacy, Sciences and Technology of Târgu Mureș, Romania
| | - Gabriel Hancu
- Department of Pharmaceutical Chemistry, "George Emil Palade" University of Medicine, Pharmacy, Sciences and Technology of Târgu Mureș, Romania
| | - Hajnal Kelemen
- Department of Pharmaceutical Chemistry, "George Emil Palade" University of Medicine, Pharmacy, Sciences and Technology of Târgu Mureș, Romania
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, Budapest, Hungary
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22
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Hancu G, Papp LA, Tóth G, Kelemen H. The Use of Dual Cyclodextrin Chiral Selector Systems in the Enantioseparation of Pharmaceuticals by Capillary Electrophoresis: An Overview. Molecules 2021; 26:2261. [PMID: 33919692 PMCID: PMC8069766 DOI: 10.3390/molecules26082261] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/12/2021] [Accepted: 04/12/2021] [Indexed: 11/17/2022] Open
Abstract
Cyclodextrin (CD) derivatives are the most efficient and frequently used chiral selectors (CSs) in capillary electrophoresis (CE). There are situations when the use of a single CD as CS is not enough to obtain efficient chiral discrimination of the enantiomers; in these cases, sometimes this problem can be resolved using a dual CD system. The use of dual CD systems can often dramatically enhance enantioseparation selectivity and can be applied for the separation of many analytes of pharmaceutical interest for which enantioseparation by CE with another CS systems can be problematic. Usually in a dual CD system an anionic CD is used together with a neutral one, but there are situations when the use of a cationic CD with a neutral one or the use of two neutral CDs or even two ionized CDs can be an efficient solution. In the current review we present general aspects of the use of dual CD systems in the analysis of pharmaceutical substances. Several examples of applications of the use of dual CD systems in the analysis of pharmaceuticals are selected and discussed. Theoretical aspects regarding the separation of enantiomers through simultaneous interaction with the two CSs are also explained. Finally, advantages, disadvantages, potential and new direction in this chiral analysis field are highlighted.
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Affiliation(s)
- Gabriel Hancu
- Department of Pharmaceutical and Therapeutic Chemistry, Faculty of Pharmacy, University of Medicine, Pharmacy, Science and Technology “George Emil Palade” of Târgu Mureș, 540142 Târgu Mureș, Romania; (G.H.); (H.K.)
| | - Lajos Attila Papp
- Department of Pharmaceutical and Therapeutic Chemistry, Faculty of Pharmacy, University of Medicine, Pharmacy, Science and Technology “George Emil Palade” of Târgu Mureș, 540142 Târgu Mureș, Romania; (G.H.); (H.K.)
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, H-1092 Budapest, Hungary;
| | - Hajnal Kelemen
- Department of Pharmaceutical and Therapeutic Chemistry, Faculty of Pharmacy, University of Medicine, Pharmacy, Science and Technology “George Emil Palade” of Târgu Mureș, 540142 Târgu Mureș, Romania; (G.H.); (H.K.)
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23
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Kovács D, Király P, Tóth G. Sample-size dependence of validation parameters in linear regression models and in QSAR. SAR QSAR Environ Res 2021; 32:247-268. [PMID: 33749419 DOI: 10.1080/1062936x.2021.1890208] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 02/10/2021] [Indexed: 06/12/2023]
Abstract
The dependence of statistical validation parameters was investigated on the size of the sample taken in fit of multivariate linear curves. We observed that R2 and related internal parameters were misleading as they overestimated the goodness-of-fit of models at small sample size. Cross-validation metrics showed correct trends. It was possible to scale the leave-one-out and the leave-many-out results close to identical by correcting the degrees of freedom of the models. y and x-randomized validation parameters were calculated and the methods provided close to identical results. We suggest to use the simplest methods in both cases. The external parameters followed correct trends with respect to the sample size, but their sensitivity differed. We plotted the Roy-Ojha metrics in 2D and we coloured them with respect to other external parameters to provide an easy classification of models. The rank correlations were calculated between the performance parameters. Up to a sample size, goodness-of-fit and robustness were distinguishable, but above a certain sample size, the parameters were redundant. The external-internal pairs were weakly correlated. Our data show that all the three aspects of validation are necessary at small sample sizes, but the internal check of robustness is not informative above a given sample size.
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Affiliation(s)
- D Kovács
- Institute of Chemistry, Loránd Eötvös University, Budapest, Hungary
| | - P Király
- Institute of Chemistry, Loránd Eötvös University, Budapest, Hungary
| | - G Tóth
- Institute of Chemistry, Loránd Eötvös University, Budapest, Hungary
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Tóth G, Háhn J, Radó J, Szalai DA, Kriszt B, Szoboszlay S. Cytotoxicity and hormonal activity of glyphosate-based herbicides. Environ Pollut 2020; 265:115027. [PMID: 32806452 DOI: 10.1016/j.envpol.2020.115027] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 06/11/2020] [Accepted: 06/11/2020] [Indexed: 06/11/2023]
Abstract
Glyphosate-based herbicides (GBHs) are the most widely used pesticides for weed control. In parallel with the renewal of the active ingredient, polyethoxylated POE(15) containing GBHs were banned in the EU in 2016. Since then, co-formulants were changed and numerous GBHs are marketed with different excipients declared as inert substances. In our study, we focused to determine acute and chronic cytotoxicity (by Aliivibrio fischeri assay) and direct hormonal activity (estrogenic and androgenic effects measured by Saccharomyces cerevisiae BLYES/BLYAS strains, respectively) of glyphosate, AMPA, polyethoxylated POE(15) and 13 GBHs from which 11 formulations do not contain polyethoxylated POE(15). Among the pure substances, neither glyphosate nor AMPA had any effects, while polyethoxylated POE(15) exhibited pronounced toxicity and was also estrogenic but not androgenic. Regarding the acute and chronic cytotoxicity and hormonal activity of GBHs, dilution percentages calculated from EC50 values were in the most cases by one or two order of magnitude lower than the minimum recommended dilution for agricultural and household use. Relation could not be observed between the biological effects and type of glyphosate-salts; hence toxicity could be linked to the co-formulants, which are not even declared in 3 GBHs. Toxicological evaluation must focus on these substances and free accessibility of GBHs should be reconsidered.
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Affiliation(s)
- Gergő Tóth
- Szent István University, Faculty of Agricultural and Environmental Sciences, Department of Environmental Protection and Safety, 1 Páter Károly Street, Gödöllő, 2100, Hungary.
| | - Judit Háhn
- Szent István University, Regional University Centre of Excellence, 1 Páter Károly Street, Gödöllő, 2100, Hungary.
| | - Júlia Radó
- Szent István University, Faculty of Agricultural and Environmental Sciences, Department of Environmental Protection and Safety, 1 Páter Károly Street, Gödöllő, 2100, Hungary.
| | - Diána A Szalai
- Szent István University, Faculty of Agricultural and Environmental Sciences, Department of Environmental Protection and Safety, 1 Páter Károly Street, Gödöllő, 2100, Hungary
| | - Balázs Kriszt
- Szent István University, Faculty of Agricultural and Environmental Sciences, Department of Environmental Protection and Safety, 1 Páter Károly Street, Gödöllő, 2100, Hungary.
| | - Sándor Szoboszlay
- Szent István University, Faculty of Agricultural and Environmental Sciences, Department of Environmental Protection and Safety, 1 Páter Károly Street, Gödöllő, 2100, Hungary.
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25
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Tóth G, Fogarasi E, Bartalis-Fábián Á, Foroughbakhshfasaei M, Boldizsár I, Darcsi A, Lohner S, Scriba GK, Szabó ZI. Liquid chromatographic method for the simultaneous determination of achiral and chiral impurities of dapoxetine in approved and counterfeit products. J Chromatogr A 2020; 1626:461388. [DOI: 10.1016/j.chroma.2020.461388] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 06/30/2020] [Accepted: 07/03/2020] [Indexed: 02/07/2023]
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26
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Köteles I, Foroughbakhshfasaei M, Dobó M, Ádám M, Boldizsár I, Szabó ZI, Tóth G. Determination of the Enantiomeric Purity of Solriamfetol by High-Performance Liquid Chromatography in Polar Organic Mode Using Polysaccharide-Type Chiral Stationary Phases. Chromatographia 2020. [DOI: 10.1007/s10337-020-03911-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Juhász S, Tóth G, Lengyel B. Brokering the core and the periphery: Creative success and collaboration networks in the film industry. PLoS One 2020; 15:e0229436. [PMID: 32106266 PMCID: PMC7046270 DOI: 10.1371/journal.pone.0229436] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 02/06/2020] [Indexed: 11/18/2022] Open
Abstract
In collaboration-based creative industries, such as film production, creators in the network core enjoy prestige and legitimacy that are key for creative success. However, core creators are challenged to maintain diverse access to new ideas or alternative views that often emerge from the network periphery. In this paper, we demonstrate that creators in the network core can increase the probability of their creative success by brokering peripheral collaborators to the core. The argument is tested on a dynamic collaboration network of movie creators constructed from a unique dataset of Hungarian feature films for the 1990-2009 period. We propose a new way to capture brokers' role in core/periphery networks and provide evidence that being in the core and at the same time bridging between the core and the periphery of the network significantly increases the likelihood of award winning.
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Affiliation(s)
- Sándor Juhász
- Agglomeration and Social Networks Lendület Research Group, Centre for Economic and Regional Studies, Hungarian Academy of Sciences, Budapest, Hungary
- Institute of Economics and Economic Development, Faculty of Economics and Business Administration, University of Szeged, Szeged, Hungary
- * E-mail:
| | - Gergő Tóth
- Agglomeration and Social Networks Lendület Research Group, Centre for Economic and Regional Studies, Hungarian Academy of Sciences, Budapest, Hungary
- Spatial Dynamics Lab, University College Dublin, Dublin, Ireland
| | - Balázs Lengyel
- Agglomeration and Social Networks Lendület Research Group, Centre for Economic and Regional Studies, Hungarian Academy of Sciences, Budapest, Hungary
- International Business School, Budapest, Hungary
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28
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Bartha GS, Tóth G, Horváth P, Kiss E, Papp N, Kerényi M. Analysis of aristolochlic acids and evaluation of antibacterial activity of
Aristolochia clematitis L. Biol Futur 2020; 70:323-329. [DOI: 10.1556/019.70.2019.36] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 11/17/2019] [Indexed: 11/19/2022]
Abstract
Introduction
Several Aristolochia species were used as medicinal
herb across Europe and in recent years, their antimicrobial activity has also been
investigated.
Materials and methods
In this study, A. clematitis was selected to evaluate
the aristolochic acids I and II (AA I and AA II) concentrations and the antimicrobial
activity of methanol, hexane, butanol, and ethyl acetate extracts of the root, stem,
leaf, root, and fruit. AA I and AA II contents were measured by a validated
high-performance liquid chromatography–ultraviolet method.
Results
Each fraction of the plant contained AA I and AA II and the root was found to
have the highest contents of AA I (1.09%) and AA II (0.7454%). The minimum inhibitory
concentrations of all extracts were determined by standard microdilution method. The
fruit’s extracts showed the most efficient antimicrobial effect against both
methicillin sensitive and resistant Staphylococcus aureus
strains.
Conclusion
Correlation between the AA I and AA II concentrations and the antimicrobial
effect was not found.
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Affiliation(s)
- Gergely Sámuel Bartha
- 1 Department of Pharmacognosy, University of Pécs, Rókus u. 2., Pécs, H-7624, Hungary
| | - Gergő Tóth
- 2 Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre u. 9., Budapest H-1092, Hungary
- 3 Institutional Excellence Program, Natural Bioactive Compounds Group, Eötvös Loránd University, Kazinczy u. 23–27., Budapest H-1075, Hungary
| | - Péter Horváth
- 2 Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre u. 9., Budapest H-1092, Hungary
| | - Eszter Kiss
- 2 Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre u. 9., Budapest H-1092, Hungary
| | - Nóra Papp
- 1 Department of Pharmacognosy, University of Pécs, Rókus u. 2., Pécs, H-7624, Hungary
| | - Monika Kerényi
- 4 Department of Medical Microbiology and Immunology, Medical School, University of Pécs, Szigeti út 12, Pécs H-7624, Hungary
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Tóth G, Háhn J, Kriszt B, Szoboszlay S. Acute and chronic toxicity of herbicides and their mixtures measured by Aliivibrio fischeri ecotoxicological assay. Ecotoxicol Environ Saf 2019; 185:109702. [PMID: 31585394 DOI: 10.1016/j.ecoenv.2019.109702] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 09/18/2019] [Accepted: 09/19/2019] [Indexed: 06/10/2023]
Abstract
The purpose of our work was to determine the acute and chronic toxicity of three of the EU's most common herbicides - mesotrione, S-metolachlor, terbuthylazine - and their mixtures by Aliivibrio fischeri ecotoxicological assays. While comparing the sensitivity of the acute (30 min) Microtox® standard assay with the chronic (25 h) test adapted to microtiter plate, joint effects (antagonism, additive effect and synergism) to the bioluminescence inhibition (consequently the metabolic damage) in A. fischeri were also determined by Combination Index (CI) method. 30 min of exposure to mesotrione and S-metolachlor resulted in a relatively low acute toxicity (EC50 values were 118 and 265 mg/L), while terbuthylazine did not cause bioluminescence inhibition at all. Results showed that the chronic toxicity of S-metolachlor and terbuthylazine to A. fischeri (EC5010h = 59.2 and 4.9 mg/L and EC5015h = 54.0 and 9.6 mg/L, respectively) is larger by at least one order of magnitude than that after 30 min of contact time. Considering mesotrione no significant difference was experienced in toxicity. Regarding the EC50 values, all of the mixtures had synergistic joint effects in the acute assay. However, in the chronic test all the mixtures showed antagonistic responses with the exception of mesotrione and S-metolachlor (ratio 1:1) combination, which also had additive and synergistic effects after 10 and 15 h of exposure, similarly to the short-term test. This is also the first report of the joint effects of these herbicides. The chronic test is a more sensitive indicator to the active ingredients; both acute and chronic assays supply valuable data of the toxic properties of the pesticides. Moreover, the short- and long-term joint effects of their mixtures supporting a more accurate and reliable risk assessment.
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Affiliation(s)
- Gergő Tóth
- Szent István University, Faculty of Agricultural and Environmental Sciences, Department of Environmental Safety and Ecotoxicology, 1 Páter Károly Street, Gödöllő, 2100, Hungary
| | - Judit Háhn
- Szent István University, Regional University Center of Excellence, 1 Páter Károly Street, Gödöllő, 2100, Hungary.
| | - Balázs Kriszt
- Szent István University, Faculty of Agricultural and Environmental Sciences, Department of Environmental Safety and Ecotoxicology, 1 Páter Károly Street, Gödöllő, 2100, Hungary
| | - Sándor Szoboszlay
- Szent István University, Faculty of Agricultural and Environmental Sciences, Department of Environmental Safety and Ecotoxicology, 1 Páter Károly Street, Gödöllő, 2100, Hungary
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30
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Nagy-Győr L, Farkas E, Lăcătuș M, Tóth G, Incze D, Hornyánszky G, Bódai V, Paizs C, Poppe L, Balogh-Weiser D. Conservation of the Biocatalytic Activity of Whole Yeast Cells by Supported Sol – Gel Entrapment for Efficient Acyloin Condensation. Period Polytech Chem Eng 2019. [DOI: 10.3311/ppch.14645] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
In this study, an efficient and generally applicable 2nd generation sol – gel entrapment method was developed for immobilization of yeastcells. Cells of Lodderomyces elongisporus, Candida norvegica, Debaryomyces fabryi, Pichia carsonii strains in admixture with hollow silica microspheres support were immobilized in sol – gel matrix obtained from polycondensation of tetraethoxysilane. As biocatalysts in theselective acyloin condensation of benzaldehyde catalyzed by pyruvate decarboxylase of the yeast, the novel immobilized whole-cell preparations were compared to other states of the cells such as freshly harvested wet cell paste, lyophilized cells and sol – gel entrapped preparations without hollow silica microspheres support. Reusability and storability studies designated this novel 2nd generation sol – gel method as a promising alternative for solid formulation of whole-cells bypassing expensive and difficult downstream steps while providing easy-to-handle and stable biocatalysts with long-term preservation of the biocatalytic activity.
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Papp LA, Foroughbakhshfasaei M, Fiser B, Horváth P, Kiss E, Sekkoum K, Gyéresi Á, Hancu G, Noszál B, Szabó ZI, Tóth G. Reversed-phase HPLC enantioseparation of pantoprazole using a teicoplanin aglycone stationary phase-Determination of the enantiomer elution order using HPLC-CD analyses. Chirality 2019; 32:158-167. [PMID: 31795019 DOI: 10.1002/chir.23146] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 09/11/2019] [Accepted: 10/16/2019] [Indexed: 01/27/2023]
Abstract
A direct HPLC method was developed for the enantioseparation of pantoprazole using macrocyclic glycopeptide-based chiral stationary phases, along with various methods to determine the elution order without isolation of the individual enantiomers. In the preliminary screening, four macrocyclic glycopeptide-based chiral stationary phases containing vancomycin (Chirobiotic V), ristocetin A (Chirobiotic R), teicoplanin (Chirobiotic T), and teicoplanin-aglycone (Chirobiotic TAG) were screened in polar organic and reversed-phase mode. Best results were achieved by using Chirobiotic TAG column and a methanol-water mixture as mobile phase. Further method optimization was performed using a face-centered central composite design to achieve the highest chiral resolution. Optimized parameters, offering baseline separation (resolution = 1.91 ± 0.03) were as follows: Chirobiotic TAG stationary phase, thermostated at 10°C, mobile phase consisting of methanol/20mM ammonium acetate 60:40 v/v, and 0.6 mL/min flow rate. Enantiomer elution order was determined using HPLC hyphenated with circular dichroism (CD) spectroscopy detection. The online CD signals of the separated pantoprazole enantiomers at selected wavelengths were compared with the structurally analogous esomeprazole enantiomer. For further verification, the inline rapid, multiscan CD signals were compared with the quantum chemically calculated CD spectra. Furthermore, docking calculations were used to investigate the enantiorecognition at molecular level. The molecular docking shows that the R-enantiomer binds stronger to the chiral selector than its antipode, which is in accordance with the determined elution order on the column-S- followed by the R-isomer. Thus, combined methods, HPLC-CD and theoretical calculations, are highly efficient in predicting the elution order of enantiomers.
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Affiliation(s)
- Lajos Attila Papp
- Department of Pharmaceutical Chemistry, University of Medicine, Pharmacy, Sciences and Tehnology, Târgu Mureş, Romania
| | | | - Béla Fiser
- Institue of Chemistry, Faculty of Materials Science and Engineering, University of Miskolc, Miskolc, Hungary.,Ferenc Rákóczi II. Transcarpathian Hungarian Institute, Beregszász, Transcarpathia, Ukraine
| | - Péter Horváth
- Department of Pharmaceutical Chemistry, Semmelweis University, Budapest, Hungary
| | - Eszter Kiss
- Department of Pharmaceutical Chemistry, Semmelweis University, Budapest, Hungary
| | - Khaled Sekkoum
- Bioactive Molecules and Chiral Separation Laboratory, Faculty of Science and Technology, University of Béchar, Béchar, Algeria
| | - Árpád Gyéresi
- Department of Pharmaceutical Chemistry, University of Medicine, Pharmacy, Sciences and Tehnology, Târgu Mureş, Romania
| | - Gabriel Hancu
- Department of Pharmaceutical Chemistry, University of Medicine, Pharmacy, Sciences and Tehnology, Târgu Mureş, Romania
| | - Béla Noszál
- Department of Pharmaceutical Chemistry, Semmelweis University, Budapest, Hungary
| | - Zoltán-István Szabó
- Department of Drugs Industry and Pharmaceutical Management, University of Medicine, Pharmacy, Sciences and Technology, Târgu Mureș, Romania
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, Budapest, Hungary
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Ferencz E, Kovács B, Boda F, Foroughbakhshfasaei M, Kelemen ÉK, Tóth G, Szabó ZI. Simultaneous determination of chiral and achiral impurities of ivabradine on a cellulose tris(3-chloro-4-methylphenylcarbamate) chiral column using polar organic mode. J Pharm Biomed Anal 2019; 177:112851. [PMID: 31499427 DOI: 10.1016/j.jpba.2019.112851] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 08/29/2019] [Accepted: 08/30/2019] [Indexed: 11/15/2022]
Abstract
A high performance liquid chromatographic method was developed for the simultaneous determination of the related substances (R-ivabradine, dehydro-S-ivabradine, N-demethyl-S-ivabradine, ((S)-3,4-dimethoxy-bicyclo[4.2.0]octa-1,3,5-triene-7-yl-methyl)-methyl-amine) and 1-(7,8-dimethoxy-1,3,4,5-tetrahydro-2H-3-benzazepine-2-on-3-yl)-3-chloro-propane) of the heart-rate lowering drug, ivabradine. The separation capability of seven different polysaccharide-type chiral columns (Lux Amylose-1, Lux i-Amylose-1, Lux Amylose-2, Lux Cellulose-1, Lux Cellulose-2, Lux Cellulose-3 and Lux Cellulose-4) was investigated with a mobile phase consisting of 0.1% diethylamine in methanol, 2-propanol and acetonitrile. During the screnning experiments the best results were obtained on Lux Cellulose-2 (based on cellulose tris(3-chloro-4-methylphenylcarbamate) column with methanol with an ideal case, where all the impurities eluted before the S-ivabradine peak. Chromatographic parameters (flow rate, temperature and mobile phase constituents) were optimized by a full factorial screening design. Using optimized parameters (Lux Cellulose-2 column with 0.06% (v/v) diethylamine in methanol/acetonitrile 98/2 (v/v) with 0.45 mL/min flow rate at 12 °C) baseline separations were achieved between all compounds. The optimized method was validated according to the International Council on Harmonization Q2(R1) guideline and proved to be reliable, linear, precise and accurate for determination of at least 0.05% for all impurities in S-ivabradine samples. Method application was tested on a commercial tablet formulation and proved to be suitable for routine quality control of both chiral and achiral related substances of S-ivabradine.
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Affiliation(s)
- Elek Ferencz
- Faculty of Pharmacy, University of Medicine, Pharmacy, Sciences and Technology of Targu Mures, Gh. Marinescu 38, RO-540139, Tîrgu Mureș, Romania; Gedeon Richter Romania S.A., RO-540306, Tîrgu Mureș, Romania
| | - Béla Kovács
- Faculty of Pharmacy, University of Medicine, Pharmacy, Sciences and Technology of Targu Mures, Gh. Marinescu 38, RO-540139, Tîrgu Mureș, Romania; Gedeon Richter Romania S.A., RO-540306, Tîrgu Mureș, Romania
| | - Francisc Boda
- Faculty of Pharmacy, University of Medicine, Pharmacy, Sciences and Technology of Targu Mures, Gh. Marinescu 38, RO-540139, Tîrgu Mureș, Romania
| | | | | | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes E. u. 9, Budapest, Hungary.
| | - Zoltán-István Szabó
- Faculty of Pharmacy, University of Medicine, Pharmacy, Sciences and Technology of Targu Mures, Gh. Marinescu 38, RO-540139, Tîrgu Mureș, Romania; Gedeon Richter Romania S.A., RO-540306, Tîrgu Mureș, Romania.
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Pálla T, Fogarasi E, Noszál B, Tóth G. Characterization of the Site-Specific Acid-Base Equilibria of 3-Nitrotyrosine. Chem Biodivers 2019; 16:e1900358. [PMID: 31364276 DOI: 10.1002/cbdv.201900358] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 07/30/2019] [Indexed: 11/07/2022]
Abstract
The complete macro- and microequilibrium analyses of 3-nitrotyrosine, a biomarker of oxidative stress damage, are presented for the first time. The protonation macroconstants were determined by 1 H-NMR-pH titration, while microconstants were elucidated by a combination of deductive and NMR methods, in which properties of the methyl ester derivative as an auxiliary compound were also studied. Combination of the NMR-pH characterization of the title and auxiliary compounds and the pair-interactivity parameters of 3-iodotyrosine provided the sufficient system to evaluate all the microconstants. NMR-pH profiles, macroscopic and microscopic protonation schemes, and species-specific distribution diagrams are included. The phenolate basicity of 3-nitrotyrosine is 500 times below that of tyrosine, and it is even lower than that of 3-iodotyrosine. This phenomenon can be explained by the stronger electron withdrawing and the negative mesomeric effect of the nitro group. Based on our results, 89 % of the phenolic OH groups are deprotonated in 3-NT molecules at the pH of the blood plasma.
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Affiliation(s)
- Tamás Pálla
- Semmelweis University, Department of Pharmaceutical Chemistry, Hőgyes E. u. 9, 1092, Budapest, Hungary
| | - Erzsébet Fogarasi
- University of Medicine, Pharmacy, Sciences and Technology of Târgu Mureş, Faculty of Pharmacy, Department of Toxicology and Biopharmacy, Str. Marinescu Gheorghe 38, 540142, Târgu Mures, Romania
| | - Béla Noszál
- Semmelweis University, Department of Pharmaceutical Chemistry, Hőgyes E. u. 9, 1092, Budapest, Hungary
| | - Gergő Tóth
- Semmelweis University, Department of Pharmaceutical Chemistry, Hőgyes E. u. 9, 1092, Budapest, Hungary
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34
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Papp LA, Hancu G, Gyéresi Á, Kelemen H, Szabó ZI, Noszál B, Dubský P, Tóth G. Chiral separation of lansoprazole and rabeprazole by capillary electrophoresis using dual cyclodextrin systems. Electrophoresis 2019; 40:2799-2805. [PMID: 31281995 DOI: 10.1002/elps.201900107] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 06/24/2019] [Accepted: 07/05/2019] [Indexed: 12/12/2022]
Abstract
Novel capillary electrophoresis methods using CDs as chiral selectors were developed and validated for the chiral separation of lansoprazole and rabeprazole, two proton pump inhibitors. Fourteen different neutral and anionic CDs were screened at pH 4 and 7 in the preliminary analysis. Sulfobutyl-ether-β-CD with a degree of substitution of 6.5 and 10 at neutral pH proved to be the most suitable chiral selector for both compounds. Various dual CD systems were also compared, and the possible mechanisms of enantiomer separation were investigated. A dual selector system containing sulfobutyl-ether-β-CD degree of substitution 6.5 and native γ-CD proved to be the most adequate system for the separations. Method optimization was carried out using an experimental design approach, performing an initial fractional factorial screening design, followed by a central composite design to establish the optimal analytical conditions. The optimized methods (25 mM phosphate buffer, pH 7, 10 mM sulfobutyl-ether-β-CD/20 mM γ-CD, +20 kV voltage; 17°C temperature; 50 mbar/3 s injection, detection at 210 nm for lansoprazole; 25 mM phosphate buffer, pH 7, 15 mM sulfobutyl-ether-β-CD/30 mM γ-CD, +20 kV voltage; 18°C temperature; 50 mbar/3 s injection, detection at 210 nm for rabeprazole) provided baseline separation for lansoprazole (Rs = 2.91) and rabeprazole (Rs = 2.53) enantiomers with favorable migration order (in both cases the S-enantiomers migrates first). The optimized methods were validated according to current guidelines and proved to be reliable, linear, precise, and accurate for the determination of 0.15% distomer as chiral impurity in dexlansoprazole and dexrabeprazole samples.
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Affiliation(s)
- Lajos Attila Papp
- Department of Pharmaceutical Chemistry, University of Medicine, Pharmacy, Science and Technology of Târgu Mureș, Târgu Mureș, Romania
| | - Gabriel Hancu
- Department of Pharmaceutical Chemistry, University of Medicine, Pharmacy, Science and Technology of Târgu Mureș, Târgu Mureș, Romania
| | - Árpád Gyéresi
- Department of Pharmaceutical Chemistry, University of Medicine, Pharmacy, Science and Technology of Târgu Mureș, Târgu Mureș, Romania
| | - Hajnal Kelemen
- Department of Pharmaceutical Chemistry, University of Medicine, Pharmacy, Science and Technology of Târgu Mureș, Târgu Mureș, Romania
| | - Zoltán-István Szabó
- Department of Drugs Industry and Pharmaceutical Management, University of Medicine, Pharmacy, Science and Technology of Târgu Mureș, Târgu Mureș, Romania
| | - Béla Noszál
- Department of Pharmaceutical Chemistry, Semmelweis University, Budapest, Hungary
| | - Pavel Dubský
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Prague, Czech Republic
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, Budapest, Hungary
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Szabó ZI, Ludmerczki R, Fiser B, Noszál B, Tóth G. Chiral separation of rasagiline using sulfobutylether-β-cyclodextrin: capillary electrophoresis, NMR and molecular modeling study. Electrophoresis 2019; 40:1897-1903. [PMID: 30758065 DOI: 10.1002/elps.201800482] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 02/11/2019] [Accepted: 02/11/2019] [Indexed: 11/08/2022]
Abstract
Pressure-assisted stereospecific capillary electrophoresis method was developed for the determination of enantiomeric purity of the antiparkinsonian agent (R)-rasagiline. The optimized method, 50 mM glycine-HCl buffer pH 2, supplied with 30 mM sulfobutylether-β-cyclodextrin, at 35°C, applying 12 kV in reversed polarity, and -8 mbar pressure (vacuum), short-end injection with -25 mbar × 2 s, was successful for baseline separation of rasagiline enantiomers (Rs = 3.5 ± 0.1) in a short analysis time. The method was validated according to current guidelines and proved to be reliable, linear, precise and accurate for determination of 0.15% S-enantiomer as chiral impurity in R-rasagiline sample, as well as quantification of the eutomer. Method application was tested on a commercial tablet formulation. Determination of spatial structure of diastereomeric associates was based on 1 H and 2D ROESY NMR, indicating that the aromatic moiety of the molecule can enter the cyclodextrin cavity. NMR titration and molecular modeling revealed that S-rasagiline formed a more stable inclusion complex with sulfobutylether-β-cyclodextrin, than its antipode, which is in agreement with electrophoretic results.
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Affiliation(s)
- Zoltán-István Szabó
- Department of Drugs Industry and Pharmaceutical Management, Faculty of Pharmacy, University of Medicine and Pharmacy of Tîrgu Mureș, Romania
| | - Róbert Ludmerczki
- Department of Organic Chemistry, Semmelweis University, Budapest, Hungary.,Laboratorio di Scienza dei Materiali e Nanotecnologie, Dipartimento di Chimica e Farmacia, Università di Sassari
| | - Béla Fiser
- Computational Molecular Design Research Group, Institute of Chemistry, University of Miskolc, Miskolc, Hungary.,Ferenc Rákóczi II. Transcarpathian Hungarian Institute, Beregszász, Transcarpathia, Ukraine
| | - Béla Noszál
- Department of Pharmaceutical Chemistry, Semmelweis University, Budapest, Hungary
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, Budapest, Hungary
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36
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Affiliation(s)
- Sándor Hosztafi
- Department of Pharmaceutical Chemistry, Semmelweis University, Hogyes Endre utca 9, H-1092 Budapest, Hungary
| | - Márta Kraszni
- Department of Pharmaceutical Chemistry, Semmelweis University, Hogyes Endre utca 9, H-1092 Budapest, Hungary
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, Hogyes Endre utca 9, H-1092 Budapest, Hungary
| | - János Marton
- ABX Advanced Biochemical Compounds Biomedizinische Forschungsreagenzien GmbH, Heinrich-Glaeser-Strasse 10- 14, D-01454 Radeberg, Germany
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37
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Pálla T, Tóth G, Kraszni M, Mirzahosseini A, Noszál B. Population, basicity and partition of short-lived conformers. Characterization of baclofen and pregabalin, the biaxial, doubly rotating drug molecules. Eur J Pharm Sci 2018; 123:327-334. [DOI: 10.1016/j.ejps.2018.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 06/26/2018] [Accepted: 07/02/2018] [Indexed: 10/28/2022]
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38
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Mirzahosseini A, Pálla T, Orgován G, Tóth G, Noszál B. Dopamine: Acid-base properties and membrane penetration capacity. J Pharm Biomed Anal 2018; 158:346-350. [DOI: 10.1016/j.jpba.2018.06.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 06/06/2018] [Accepted: 06/08/2018] [Indexed: 11/17/2022]
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39
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Foroughbakhshfasaei M, Szabó ZI, Mirzahosseini A, Horváth P, Tóth G. Enantiomeric quality control of R-Tofisopam by HPLC using polysaccharide-type chiral stationary phases in polar organic mode. Electrophoresis 2018; 39:2566-2574. [PMID: 29999177 DOI: 10.1002/elps.201800220] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 07/01/2018] [Indexed: 11/09/2022]
Abstract
A novel, fast and economic chiral HPLC method was developed and validated for the resolution of the four isomers of tofisopam. The separation capacity of eleven different chiral columns: six polysaccharide-type including three amylose-based (Chiralpak AD, Chiralpak AD-RH and Chiralpak AS) and three cellulose-based (Chiralcel OD, Chiralcel OJ and Lux Cellulose-4); three cyclodextrin- (Quest-BC, Quest-C2 and Quest-CM) and two macrocyclic glycopeptide antibiotic-type (Chirobiotic T and Chirobiotic TAG) were screened using polar organic or reversed-phase mode. Chiralpak AD, based on amylose tris(3,5-dimethylphenylcarbamate) as chiral selector with neat methanol was identified as the most promising system. In order to improve resolution, an orthogonal experimental design was employed, altering the concentration of 2-propanol, column temperature, and flow rate in a multivariate manner. Using the optimized method (85/15 v/v methanol/2-propanol, 40°C, flow rate: 0.7 mL/min) we were not only able to separate the four isomers but also detect 0.1% S-enantiomer as chiral impurity in R-tofisopam. This is important since the latter is under development as a single enantiomeric agent. Thermodynamic investigation revealed an unusual entropy and enthalpy-entropy co-driven controlled enantioseparation on Chiralcel OJ and on Chiralpak AD column, respectively. Our newly developed HPLC method was validated according to the ICH guidelines and its application was tested on a pharmaceutical formulation containing the racemic mixture of the drug. As a further novelty, a separate circular dichroism method was applied for the investigation of the interconversion kinetics of tofisopam conformers, which proved to be crucial for sample preparation and method validation.
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Affiliation(s)
| | - Zoltán-István Szabó
- Faculty of Pharmacy, University of Medicine and Pharmacy of Tîrgu Mureş, Romania
| | - Arash Mirzahosseini
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Semmelweis University, Budapest, Hungary
| | - Péter Horváth
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Semmelweis University, Budapest, Hungary
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Semmelweis University, Budapest, Hungary
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40
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Könye R, Tóth G, Sólyomváry A, Mervai Z, Zürn M, Baghy K, Kovalszky I, Horváth P, Molnár-Perl I, Noszál B, Béni S, Boldizsár I. Chemodiversity of Cirsium fruits: Antiproliferative lignans, neolignans and sesquineolignans as chemotaxonomic markers. Fitoterapia 2018; 127:413-419. [PMID: 29653155 DOI: 10.1016/j.fitote.2018.04.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 04/04/2018] [Accepted: 04/05/2018] [Indexed: 11/29/2022]
Abstract
While analyzing the fruit composition of nine European Cirsium species representing three sections (i.e., Cephalonoplos, Chamaeleon and Eriolepis), four lignans, three neolignans and three sesquineolignans were determined and used as chemotaxonomic markers. Among them, desmethyl balanophonin and desmethyl picrasmalignan were determined for the first time in the plant kingdom, as the main metabolites of the Chamaeleon section. Prebalanophonin and prepicrasmalignan, identified so far exclusively in C. eriophorum, were also confirmed in C. boujartii and C. vulgare, highlighting the chemotaxonomic significance of these compounds in the Eriolepis section. The antiproliferative assay of the compounds isolated from their optimum sources, confirmed a dose-dependent inhibitory effect of the structures bearing the 4',7-epoxy moiety (balanophonin, picrasmalignan, desmethyl balanophonin, desmethyl picrasmalignan) against SW480 colon cancer cells, while those bearing the 4',7-dihydroxy motif (prebalanophonin, prepicrasmalignan) were inactive.
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Affiliation(s)
- Rita Könye
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest 1117, Hungary; Department of Pharmacognosy, Semmelweis University, Üllői út 26, Budapest 1085, Hungary
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre utca 7, Budapest 1092, Hungary
| | - Anna Sólyomváry
- Department of Pharmacognosy, Semmelweis University, Üllői út 26, Budapest 1085, Hungary
| | - Zsolt Mervai
- First Department of Pathology and Experimental Cancer Research, Semmelweis University, Üllői út 26, Budapest 1085, Hungary
| | - Moritz Zürn
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest 1117, Hungary
| | - Kornélia Baghy
- First Department of Pathology and Experimental Cancer Research, Semmelweis University, Üllői út 26, Budapest 1085, Hungary
| | - Ilona Kovalszky
- First Department of Pathology and Experimental Cancer Research, Semmelweis University, Üllői út 26, Budapest 1085, Hungary
| | - Péter Horváth
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre utca 7, Budapest 1092, Hungary
| | - Ibolya Molnár-Perl
- Department of Analytical Chemistry, Institute of Chemistry, Eötvös Loránd University, Pázmány Péter sétány 1/A, Budapest 1117, Hungary
| | - Béla Noszál
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre utca 7, Budapest 1092, Hungary
| | - Szabolcs Béni
- Department of Pharmacognosy, Semmelweis University, Üllői út 26, Budapest 1085, Hungary
| | - Imre Boldizsár
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest 1117, Hungary.
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41
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Varga E, Barabás C, Tóth A, Boldizsár I, Noszál B, Tóth G. Phenolic composition, antioxidant and antinociceptive activities of Syringa vulgaris L. bark and leaf extracts. Nat Prod Res 2018; 33:1664-1669. [PMID: 29336171 DOI: 10.1080/14786419.2018.1425855] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Metabolite profile, antioxidant and antinociceptive activities of Syringa vulgaris bark and leaf methanolic extracts were investigated. By means of HPLC-DAD-ESI-TOF and HPLC-DAD-ESI-MS/MS, a total of 33 phenolics were identified, including 15 secoiridoids, 6 phenylpropanoids, 3 flavonoids, 3 lignans and 6 low molecular weight phenols. Validated quantitative analysis show that syringin (2.52%) and rutin (1.13%) are the main phenolic compounds in bark and leaf, respectively. Notable radical scavenging and antinociceptive activities of the bark and leaf extracts were confirmed by in vitro DPPH● and ABTS●+ assays and by in vivo hot-plate method in mice, respectively. Our results could lay the scientific basic of future clinical perspectives of lilac bark and leaf.
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Affiliation(s)
- Erzsébet Varga
- a Department of Pharmacognosy and Phytotherapy , University of Medicine and Pharmacy , Târgu Mureș , Romania
| | - Csenge Barabás
- a Department of Pharmacognosy and Phytotherapy , University of Medicine and Pharmacy , Târgu Mureș , Romania
| | - Anita Tóth
- b Department of Pharmacognosy , Semmelweis University , Budapest , Hungary
| | - Imre Boldizsár
- c Department of Plant Anatomy , Institute of Biology, L. Eötvös University , Budapest , Hungary
| | - Béla Noszál
- d Department of Pharmaceutical Chemistry , Semmelweis University , Budapest , Hungary
| | - Gergő Tóth
- d Department of Pharmaceutical Chemistry , Semmelweis University , Budapest , Hungary
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Szabó ZI, Foroughbakhshfasaei M, Gál R, Horváth P, Komjáti B, Noszál B, Tóth G. Chiral separation of lenalidomide by liquid chromatography on polysaccharide-type stationary phases and by capillary electrophoresis using cyclodextrin selectors. J Sep Sci 2018; 41:1414-1423. [DOI: 10.1002/jssc.201701211] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 11/21/2017] [Accepted: 11/23/2017] [Indexed: 02/01/2023]
Affiliation(s)
- Zoltán-István Szabó
- Department of Drugs Industry and Pharmaceutical Management; Faculty of Pharmacy; University of Medicine and Pharmacy of Tîrgu Mureș; Tîrgu Mureș Romania
| | | | - Réka Gál
- Department of Drugs Industry and Pharmaceutical Management; Faculty of Pharmacy; University of Medicine and Pharmacy of Tîrgu Mureș; Tîrgu Mureș Romania
| | - Péter Horváth
- Department of Pharmaceutical Chemistry; Semmelweis University; Budapest Hungary
| | - Balázs Komjáti
- Department of Organic Chemistry and Technology; Budapest University of Technology and Economics; Budapest Hungary
| | - Béla Noszál
- Department of Pharmaceutical Chemistry; Semmelweis University; Budapest Hungary
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry; Semmelweis University; Budapest Hungary
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43
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Szöcs L, Völgyi G, Urai Á, Hosztafi S, Tóth G, Gergó L, Noszál B. Site- and species-specific hydrolysis rates of cocaine. J Pharm Biomed Anal 2017; 145:372-378. [PMID: 28715790 DOI: 10.1016/j.jpba.2017.07.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 06/30/2017] [Accepted: 07/01/2017] [Indexed: 11/30/2022]
Abstract
The hydroxide-catalyzed non-enzymatic hydrolysis of cocaine is quantified in terms of ten site- and species-specific rate constants in connection with also ten site- and species-specific acid-base equilibrium constants, comprising all the twelve coexisting species in solution. This characterization involves the major and minor decomposition pathways via benzoylecgonine and ecgonine methyl ester, respectively, leading to ecgonine, the final product. Hydrolysis has been found to be 10-330 times faster at site 2 than at site 3, depending on the ionization status of the amino moiety and the rest of the molecule. Nitrogen protonation accelerates the hydrolyses approximately ten times both at site 2 and site 3.
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Affiliation(s)
- Levente Szöcs
- Semmelweis University, Department of Pharmaceutical Chemistry, Research Group for Drugs of Abuse and Doping Agents, Hungarian Academy of Sciences Hőgyes E. u. 9, H-1092 Budapest, Hungary
| | - Gergely Völgyi
- Semmelweis University, Department of Pharmaceutical Chemistry, Research Group for Drugs of Abuse and Doping Agents, Hungarian Academy of Sciences Hőgyes E. u. 9, H-1092 Budapest, Hungary
| | - Ákos Urai
- Semmelweis University, Department of Pharmaceutical Chemistry, Research Group for Drugs of Abuse and Doping Agents, Hungarian Academy of Sciences Hőgyes E. u. 9, H-1092 Budapest, Hungary
| | - Sándor Hosztafi
- Semmelweis University, Department of Pharmaceutical Chemistry, Research Group for Drugs of Abuse and Doping Agents, Hungarian Academy of Sciences Hőgyes E. u. 9, H-1092 Budapest, Hungary
| | - Gergő Tóth
- Semmelweis University, Department of Pharmaceutical Chemistry, Research Group for Drugs of Abuse and Doping Agents, Hungarian Academy of Sciences Hőgyes E. u. 9, H-1092 Budapest, Hungary
| | - Lajos Gergó
- Eötvös Loránd University, Faculty of Informatics, Department of Numerical Analysis, Hungary
| | - Béla Noszál
- Semmelweis University, Department of Pharmaceutical Chemistry, Research Group for Drugs of Abuse and Doping Agents, Hungarian Academy of Sciences Hőgyes E. u. 9, H-1092 Budapest, Hungary.
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44
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Szabó ZI, Foroughbakhshfasaei M, Noszál B, Tóth G. Enantioseparation of racecadotril using polysaccharide-type chiral stationary phases in polar organic mode. Chirality 2017; 30:95-105. [DOI: 10.1002/chir.22772] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 09/13/2017] [Accepted: 09/13/2017] [Indexed: 01/11/2023]
Affiliation(s)
- Zoltán-István Szabó
- Faculty of Pharmacy; University of Medicine and Pharmacy Tîrgu Mureş; Tîrgu Mureş Romania
| | | | - Béla Noszál
- Department of Pharmaceutical Chemistry; Semmelweis University; Budapest Hungary
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry; Semmelweis University; Budapest Hungary
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45
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Vágvölgyi M, Martins A, Kulmány Á, Zupkó I, Tóth G, Hunyadi A. Preparation and chemo-sensitizing activity of nitrogen-containing ecdysteroid derivatives: 6-oximes, oxime ethers, and a lactam. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- M Vágvölgyi
- Institute of Pharmacognosy, University of Szeged, Szeged, Hungary
| | - A Martins
- Department of Medical Microbiology and Immunobiology, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Á Kulmány
- Department of Pharmacodynamics and Biopharmacy, University of Szeged, Szeged, Hungary
| | - I Zupkó
- Department of Pharmacodynamics and Biopharmacy, University of Szeged, Szeged, Hungary
| | - G Tóth
- Institute of Pharmacognosy, University of Szeged, Szeged, Hungary
- Department of Inorganic and Analytical Chemistry, NMR Group, Budapest University of Technology and Economics, Budapest, Hungary
| | - A Hunyadi
- Institute of Pharmacognosy, University of Szeged, Szeged, Hungary
- Interdisciplinary Centre for Natural Products, University of Szeged, Szeged, Hungary
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46
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Háhn J, Szoboszlay S, Tóth G, Kriszt B. Assessment of bacterial biodetoxification of herbicide atrazine using Aliivibrio fischeri cytotoxicity assay with prolonged contact time. Ecotoxicology 2017; 26:648-657. [PMID: 28466204 DOI: 10.1007/s10646-017-1797-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/22/2017] [Indexed: 06/07/2023]
Abstract
In our study, we determined and compared the atrazine-biodetoxification ability of 41 bacterial strains and 21 consortia created of those with over 50% degradation rate in pure cultures. Biodegradation capacity was measured with GC-MS. Detoxification was assessed based on the cytotoxic effect of end-products to Aliivibrio fischeri in chronic bioluminescence inhibition assay with 25 h contact time. Chronic A. fischeri assay adapted to a microplate, which is suitable for examine numerous residues simultaneously, also appeared to be significantly more sensitive to atrazine compared to the standard acute (30 min) test. Due to its sensitivity, the chronic assay could be a valuable tool to provide a more comprehensive view of the ecological risks of atrazine and other chemicals. Thirteen strains were able to degrade more than 50% of 50 ppm atrazine. Four of these belong to Rhodococcus aetherivorans, R. qingshengii, Serratia fonticola and Olivibacter oleidegradans which species' atrazine degrading ability has never been reported before. Four consortia degrading ability was more effective than that of the creating individual strains; moreover, their residues did not show cytotoxic effects to A. fischeri. However, in several cases, the degradation products of sole strains and consortia resulted in significant bioluminescence inhibition. Thus high biodegradation (>90%) does not certainly mean the reduction or cessation of toxicity highlighting the importance of the evaluation of biological effects of degradation residues to improve the efficiency and abate the ecological risks of bioremediation techniques.
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Affiliation(s)
- Judit Háhn
- Szent István University, Regional University Center of Excellence, 1 Páter Károly Street, Gödöllő, 2100, Hungary
| | - Sándor Szoboszlay
- Department of Environmental Safety and Ecotoxicology, Szent István University, 1 Páter Károly Street, Gödöllő, 2100, Hungary.
| | - Gergő Tóth
- Department of Environmental Safety and Ecotoxicology, Szent István University, 1 Páter Károly Street, Gödöllő, 2100, Hungary
| | - Balázs Kriszt
- Department of Environmental Safety and Ecotoxicology, Szent István University, 1 Páter Károly Street, Gödöllő, 2100, Hungary
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Sólyomváry A, Alberti Á, Darcsi A, Könye R, Tóth G, Noszál B, Molnár-Perl I, Lorántfy L, Dobos J, Őrfi L, Béni S, Boldizsár I. Optimized conversion of antiproliferative lignans pinoresinol and epipinoresinol: Their simultaneous isolation and identification by centrifugal partition chromatography and high performance liquid chromatography. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1052:142-149. [PMID: 28384606 DOI: 10.1016/j.jchromb.2017.03.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 03/22/2017] [Accepted: 03/29/2017] [Indexed: 01/04/2023]
Abstract
High amount of the valuable lignan pinoresinol (PR) was determined in Carduus nutans fruit (7.8mg/g) for the first time. A preparative separation method using two consecutive, identical steps of centrifugal partition chromatography (CPC) was developed in order (i) to isolate PR and (ii) to subsequently isolate PR and its 7' epimer epipinoresinol (EPR) simultaneously after an optimized acid treatment which resulted in PR epimerization forming equal amounts of PR and EPR, from C. nutans fruit. As optimal conditions, a two-phase solvent system consisting of methyl tert-butyl ether:acetone:water (4:3:3, v/v/v) for CPC separation, and an acid treatment performed at 50°C for 30min for the epimerization were applied. Thus, 33.7mg and 32.8mg PR and EPR, in as high as 93.7% and 92.3% purity, were isolated from 10.0gC. nutans fruit, representing 86.4% and 84.1% efficiency, respectively. Conversion characteristic of PR and EPR in acidic medium, determined as a function of time and temperature of acid treatment provides their unambiguous identification by on-line high performance liquid chromatography (HPLC). Antiproliferative assay of isolated PR and EPR in two different types of colon cancer cell lines (HCT116 and SW480) confirmed that both epimers caused a more significant decrease of viability in HCT116 cells than in SW480 cells, suggesting their similar mechanism of antiproliferative action.
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Affiliation(s)
- Anna Sólyomváry
- Department of Pharmacognosy, Semmelweis University, 1085 Budapest, Üllői út 26, Hungary
| | - Ágnes Alberti
- Department of Pharmacognosy, Semmelweis University, 1085 Budapest, Üllői út 26, Hungary
| | - András Darcsi
- Department of Pharmacognosy, Semmelweis University, 1085 Budapest, Üllői út 26, Hungary
| | - Rita Könye
- Department of Pharmacognosy, Semmelweis University, 1085 Budapest, Üllői út 26, Hungary; Department of Plant Anatomy, Eötvös Lóránd University, 1117 Budapest, Pázmány Péter sétány 1/C, Hungary
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, 1092 Budapest, Hőgyes Endre u. 9, Hungary
| | - Béla Noszál
- Department of Pharmaceutical Chemistry, Semmelweis University, 1092 Budapest, Hőgyes Endre u. 9, Hungary
| | - Ibolya Molnár-Perl
- Institute of Chemistry, Eötvös Lóránd University, 1117 Budapest, Pázmány Péter sétány 1/A, Hungary
| | | | - Judit Dobos
- Vichem Chemie Research Ltd., 1022 Budapest, Herman Ottó út 15, Hungary
| | - László Őrfi
- Department of Pharmaceutical Chemistry, Semmelweis University, 1092 Budapest, Hőgyes Endre u. 9, Hungary; Vichem Chemie Research Ltd., 1022 Budapest, Herman Ottó út 15, Hungary
| | - Szabolcs Béni
- Department of Pharmacognosy, Semmelweis University, 1085 Budapest, Üllői út 26, Hungary
| | - Imre Boldizsár
- Department of Plant Anatomy, Eötvös Lóránd University, 1117 Budapest, Pázmány Péter sétány 1/C, Hungary.
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48
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Szabó ZI, Gál R, Gáll Z, Vancea S, Rédai E, Fülöp I, Sipos E, Donáth-Nagy G, Noszál B, Tóth G. Cyclodextrin complexation improves aqueous solubility of the antiepileptic drug, rufinamide: solution and solid state characterization of compound-cyclodextrin binary systems. J INCL PHENOM MACRO 2017. [DOI: 10.1007/s10847-017-0710-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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49
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Szabó ZI, Gál R, Szőcs L, Ludmerczki R, Muntean DL, Noszál B, Tóth G. Validated capillary electrophoretic method for the enantiomeric quality control of R-praziquantel. Electrophoresis 2017; 38:1886-1894. [PMID: 28221678 DOI: 10.1002/elps.201600492] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 02/15/2017] [Accepted: 02/16/2017] [Indexed: 01/17/2023]
Abstract
The enantiomers of praziquantel, the drug of choice in schistosomiasis, were separated by electrokinetic chromatography with cyclodextrins. Nine anionic cyclodextrins were screened for their ability to discriminate between the uncharged enantiomers. Seven investigated selectors presented chiral interactions with the enantiomers, these cases being interpreted in terms of stability constants and complex mobilities. The best results were delivered by sulfated-β-cyclodextrin, where quasi-equal stability constants were accompanied by extreme selectivity values and was explained on the basis of highly different mobilities of the transient diastereomeric complexes. Since the enantiomer migration order was unfavorable, a simple polarity switch was employed (detection end at anode), which apart from migration order reversal, also resulted in extreme resolution values (Rs > 35) and increased migration times. After optimization (50 mM phosphate buffer pH 2.0, supplied with 15 mM sulfated-β-cyclodextrin, 15 kV, capillary temperature 25°C, short-end injection with 50 mbar × 2 s), analysis time under 10 min were obtained, while still maintaining high resolution (Rs > 10). The method was validated according to the ICH guidelines and application of the method was tested on in-house synthetized R-praziquantel batches and on commercial, combination tablets containing racemic mixture of the drug.
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Affiliation(s)
- Zoltán-István Szabó
- Faculty of Pharmacy, University of Medicine and Pharmacy of Tîrgu Mureș, Tîrgu Mureș, Romania
| | - Réka Gál
- Faculty of Pharmacy, University of Medicine and Pharmacy of Tîrgu Mureș, Tîrgu Mureș, Romania
| | - Levente Szőcs
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Semmelweis University, Budapest, Hungary
| | - Róbert Ludmerczki
- Department of Organic Chemistry, Faculty of Pharmacy, Semmelweis University, Budapest, Hungary
| | - Daniela-Lucia Muntean
- Faculty of Pharmacy, University of Medicine and Pharmacy of Tîrgu Mureș, Tîrgu Mureș, Romania
| | - Béla Noszál
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Semmelweis University, Budapest, Hungary
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Semmelweis University, Budapest, Hungary
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Abstract
CASE REPORT This article reports a case of bilateral simultaneous central retinal vein occlusion (CRVO) and protein S deficiency. The 27-year-old male patient presented with a sudden decrease in vision in both eyes. The patient's medical history documented the death of his father at the age of 33 years due to pulmonary embolism. Thrombophilia screening revealed protein S deficiency. OBJECTIVES We report this case to emphasize that in any case of young onset retinal vein occlusion, protein S deficiency should be suspected. CONCLUSIONS Thrombophilia assays and taking a thorough medical history should be performed.
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Affiliation(s)
- G Tóth
- Augenklinik, Semmelweis Universität, Mária u. 39, 1085, Budapest, Ungarn.
| | - G L Sándor
- Augenklinik, Semmelweis Universität, Mária u. 39, 1085, Budapest, Ungarn
| | - C Reichel
- Universitäts-Augenklinik, Freiburg, Deutschland
| | - G Domján
- II. Klinik für Innere Medizin, Semmelweis Universität, Budapest, Ungarn
| | - Z Z Nagy
- Augenklinik, Semmelweis Universität, Mária u. 39, 1085, Budapest, Ungarn
| | - M Ecsedy
- Augenklinik, Semmelweis Universität, Mária u. 39, 1085, Budapest, Ungarn
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