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Tóth G, Santa-Maria AR, Herke I, Gáti T, Galvis-Montes D, Walter FR, Deli MA, Hunyadi A. Correction to "Highly Oxidized Ecdysteroids from a Commercial Cyanotis arachnoidea Root Extract as Potent Blood-Brain Barrier Protective Agents". J Nat Prod 2023; 86:2739-2740. [PMID: 37994035 PMCID: PMC10749464 DOI: 10.1021/acs.jnatprod.3c00927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Indexed: 11/24/2023]
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2
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Tóth G, Santa-Maria AR, Herke I, Gáti T, Galvis-Montes D, Walter FR, Deli MA, Hunyadi A. Highly Oxidized Ecdysteroids from a Commercial Cyanotis arachnoidea Root Extract as Potent Blood-Brain Barrier Protective Agents. J Nat Prod 2023; 86:1074-1080. [PMID: 36825873 PMCID: PMC10152481 DOI: 10.1021/acs.jnatprod.2c00948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Indexed: 05/04/2023]
Abstract
Ecdysteroid-containing herbal extracts, commonly prepared from the roots of Cyanotis arachnoidea, are marketed worldwide as a "green" anabolic food supplement. Herein are reported the isolation and complete 1H and 13C NMR signal assignments of three new minor ecdysteroids (compounds 2-4) from this extract. Compound 4 was identified as a possible artifact that gradually forms through the autoxidation of calonysterone. The compounds tested demonstrated a significant protective effect on the blood-brain barrier endothelial cells against oxidative stress or inflammation at a concentration of 1 μM. Based on these results, minor ecdysteroids present in food supplements may offer health benefits in various neurodegenerative disease states.
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Affiliation(s)
- Gábor Tóth
- Department
of Inorganic and Analytical Chemistry, NMR Group, Budapest University of Technology and Economics, H-1111 Budapest, Hungary
| | - Ana R. Santa-Maria
- Institute
of Biophysics, Biological Research Centre, Szeged H-6726, Hungary
- Wyss
Institute for Biologically Inspired Engineering at Harvard University, Boston, Massachusetts 02115, United States
| | - Ibolya Herke
- Department
of Inorganic and Analytical Chemistry, NMR Group, Budapest University of Technology and Economics, H-1111 Budapest, Hungary
| | - Tamás Gáti
- Servier
Research Institute of Medicinal Chemistry (SRIMC), H-1031 Budapest, Hungary
| | | | - Fruzsina R. Walter
- Institute
of Biophysics, Biological Research Centre, Szeged H-6726, Hungary
| | - Mária A. Deli
- Institute
of Biophysics, Biological Research Centre, Szeged H-6726, Hungary
| | - Attila Hunyadi
- Institute of Pharmacognosy, and Interdisciplinary
Centre of Natural Products, University of
Szeged, H-6720 Szeged, Hungary
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3
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Tefner IK, Bender T, Kleiber J, Hodosi K, Gáti T. The effects of immersion in 42℃ radon, natrium, calcium, bicarbonate content thermal-mineral water on chronic low back pain. Controlled, follow-up study. Int J Biometeorol 2023; 67:527-537. [PMID: 36708381 DOI: 10.1007/s00484-023-02433-3] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 01/20/2023] [Indexed: 06/18/2023]
Abstract
In our minimized follow-up trial with 137 participants with chronic low back pain, one group of participants received regular outpatient care, and the other group received balneotherapy by immersion in 42℃ thermal-mineral water in addition to regular outpatient care on 15 occasions for 3 weeks. Pain on movement and at rest on the 0-100 mm visual analogue scale (VAS), Oswestry index, the number of participants evaluating the symptoms clinically acceptable (Patient Acceptable Symptom State, PASS) and the EuroQol-5D-5L (EQ-5D-5L) quality of life questionnaire were assessed at basal time (at week 0) and after balneotherapy (at weeks 3 and 12). The VAS pain scores, the Oswestry index, the EQ-5D-5L index and the EQ-VAS significantly improved in the balneotherapy group after treatment at week 3 (p < 0.001) and week 12 (p < 0.001) compared to baseline, with a significant between group difference at week 3 (p < 0.001) and week 12 (p < 0.001). The pain VAS score on movement was 66.82 ± 11.48, 26.69 ± 21.49, and 20.09 ± 23.29 in the balneotherapy group, and 63.67 ± 14.77, 67.35 ± 15.44, and 70.23 ± 18.26 in the control group at the consecutive visits. The PASS increased in both groups at week 3 and week 12 compared to the baseline, with a significant between-group difference at week 3 and week 12 for the balneotherapy group. Our results suggest the therapeutic efficacy of immersion in 42℃ thermal mineral water on chronic low back pain.ClinicalTrials.gov Identifier: NCT05342051.
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Affiliation(s)
- Ildikó Katalin Tefner
- Department of Rheumatology, Saint Cosmas Health Center of Joseph Town, Budapest, Hungary.
| | - Tamás Bender
- Department of Rheumatology, Polyclinic of The Hospitaller Brothers of St John of God, Budapest, Hungary
| | - Judit Kleiber
- Department of Rheumatology, Saint Cosmas Health Center of Joseph Town, Budapest, Hungary
| | - Katalin Hodosi
- Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Tamás Gáti
- Department of Rheumatology, Saint Cosmas Health Center of Joseph Town, Budapest, Hungary
- Department of Rheumatology, Polyclinic of The Hospitaller Brothers of St John of God, Budapest, Hungary
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4
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Agbadua OG, Kúsz N, Berkecz R, Gáti T, Tóth G, Hunyadi A. Oxidized Resveratrol Metabolites as Potent Antioxidants and Xanthine Oxidase Inhibitors. Antioxidants (Basel) 2022; 11:antiox11091832. [PMID: 36139906 PMCID: PMC9495788 DOI: 10.3390/antiox11091832] [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: 08/03/2022] [Revised: 09/07/2022] [Accepted: 09/14/2022] [Indexed: 11/16/2022] Open
Abstract
Resveratrol is a well-known natural polyphenol with a plethora of pharmacological activities. As a potent antioxidant, resveratrol is highly oxidizable and readily reacts with reactive oxygen species (ROS). Such a reaction not only leads to a decrease in ROS levels in a biological environment but may also generate a wide range of metabolites with altered bioactivities. Inspired by this notion, in the current study, our aim was to take a diversity-oriented chemical approach to study the chemical space of oxidized resveratrol metabolites. Chemical oxidation of resveratrol and a bioactivity-guided isolation strategy using xanthine oxidase (XO) and radical scavenging activities led to the isolation of a diverse group of compounds, including a chlorine-substituted compound (2), two iodine-substituted compounds (3 and 4), two viniferins (5 and 6), an ethoxy-substituted compound (7), and two ethoxy-substitute,0d dimers (8 and 9). Compounds 4, 7, 8, and 9 are reported here for the first time. All compounds without ethoxy substitution exerted stronger XO inhibition than their parent compound, resveratrol. By enzyme kinetic and in silico docking studies, compounds 2 and 4 were identified as potent competitive inhibitors of the enzyme, while compound 3 and the viniferins acted as mixed-type inhibitors. Further, compounds 2 and 9 had better DPPH scavenging activity and oxygen radical absorbing capacity than resveratrol. Our results suggest that the antioxidant activity of resveratrol is modulated by the effect of a cascade of chemically stable oxidized metabolites, several of which have significantly altered target specificity as compared to their parent compound.
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Affiliation(s)
| | - Norbert Kúsz
- Institute of Pharmacognosy, University of Szeged, H-6720 Szeged, Hungary
| | - Róbert Berkecz
- Institute of Pharmaceutical Analysis, University of Szeged, H-6720 Szeged, Hungary
| | - Tamás Gáti
- Servier Research Institute of Medicinal Chemistry (SRIMC), H-1031 Budapest, Hungary
| | - Gábor Tóth
- NMR Group, Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, H-1111 Budapest, Hungary
| | - Attila Hunyadi
- Institute of Pharmacognosy, University of Szeged, H-6720 Szeged, Hungary
- Interdisciplinary Centre of Natural Products, University of Szeged, H-6720 Szeged, Hungary
- Correspondence: ; Tel.: +36-62545557
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5
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Barna B, Gáti T, Kotschy A, Tasnádi G. Chemo‐enzymatic One‐Pot Two‐Step Functionalization of 1,2,3,4‐Tetrahydroisoquinolines by Monoamine Oxidase‐Ugi‐Joullié‐reaction Sequence. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Bence Barna
- Servier Research Institute of Medicinal Chemistry Servier Research Institute of Medicinal Chemistry Záhony utca 7 1031 HUNGARY
| | - Tamás Gáti
- Servier Research Institute of Medicinal Chemistry Servier Research Institute of Medicinal Chemistry Záhony utca 7 1031 HUNGARY
| | - András Kotschy
- Servier Research Institute of Medicinal Chemistry Servier Research Institute of Medicinal Chemistry Záhony utca 7 1031 HUNGARY
| | - Gábor Tasnádi
- Servier Research Institute of Medicinal Chemistry Servier Research Institute of Medicinal Chemistry Záhony utca 7 1031 Budapest HUNGARY
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6
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Tóth G, Herke I, Gáti T, Vágvölgyi M, Berkecz R, Parfenova LV, Ueno M, Yokoi T, Nakagawa Y, Hunyadi A. A Commercial Extract of Cyanotis arachnoidea Roots as a Source of Unusual Ecdysteroid Derivatives with Insect Hormone Receptor Binding Activity. J Nat Prod 2021; 84:1870-1881. [PMID: 34143640 PMCID: PMC8314276 DOI: 10.1021/acs.jnatprod.0c01274] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Indexed: 05/13/2023]
Abstract
Ecdysteroids act as molting hormones in insects and as nonhormonal anabolic agents and adaptogens in mammals. A wide range of ecdysteroid-containing herbal extracts are available worldwide as food supplements. The aim of this work was to study such an extract as a possible industrial source of new bioactive ecdysteroids. A large-scale chromatographic isolation was performed from an extract of Cyanotis arachnoidea roots. Ten ecdysteroids (1-10) including eight new compounds were isolated and characterized by extensive nuclear magnetic resonance studies. Highly unusual structures were identified, including a H-14β (1, 2, 4, and 10) moiety, among which a 14β(H)17β(H) phytosteroid (1) is reported for the first time. Compounds with an intact side chain (4-10) and 11 other natural or semisynthetic ecdysteroids (11-21) were tested for insect ecdysteroid receptor (EcR) binding activity. Two new compounds, i.e., 14-deoxydacryhainansterone (5) and 22-oxodacryhainansterone (6), showed strong EcR binding activity (IC50 = 41.7 and 380 nM, respectively). Six compounds were identified as EcR agonists and another two as antagonists using a transgenic ecdysteroid reporter gene assay. The present results demonstrate that commercial C. arachnoidea extracts are rich in new, unusual bioactive ecdysteroids. Because of the lack of an authentic plant material, the truly biosynthetic or artifactual nature of these compounds cannot be confirmed.
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Affiliation(s)
- Gábor Tóth
- Department
of Inorganic and Analytical Chemistry, NMR Group, Budapest University of Technology and Economics, H-1111 Budapest, Hungary
| | - Ibolya Herke
- Institute of Pharmacognosy, Interdisciplinary
Excellence Centre, Institute of Pharmaceutical
Analysis, and Interdisciplinary Centre of Natural Products, University of Szeged, H-6720 Szeged, Hungary
| | - Tamás Gáti
- Servier
Research Institute of Medicinal Chemistry (SRIMC), H-1031 Budapest, Hungary
| | - Máté Vágvölgyi
- Institute of Pharmacognosy, Interdisciplinary
Excellence Centre, Institute of Pharmaceutical
Analysis, and Interdisciplinary Centre of Natural Products, University of Szeged, H-6720 Szeged, Hungary
| | - Róbert Berkecz
- Institute of Pharmacognosy, Interdisciplinary
Excellence Centre, Institute of Pharmaceutical
Analysis, and Interdisciplinary Centre of Natural Products, University of Szeged, H-6720 Szeged, Hungary
| | - Lyudmila V. Parfenova
- Institute
of Petrochemistry and Catalysis of Russian Academy of Sciences, 450075 Ufa, Russia
| | - Minori Ueno
- Graduate
School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Taiyo Yokoi
- Graduate
School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Yoshiaki Nakagawa
- Graduate
School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Attila Hunyadi
- Institute of Pharmacognosy, Interdisciplinary
Excellence Centre, Institute of Pharmaceutical
Analysis, and Interdisciplinary Centre of Natural Products, University of Szeged, H-6720 Szeged, Hungary
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7
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Szabo Z, Timari M, Kassai R, Szokol B, Benyei AC, Gáti T, Paczal A, Kotschy A. Modular Synthesis of Chiral NHC Precursors and Their Silver and Gold Complexes. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00530] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zita Szabo
- Servier Research Institute of Medicinal Chemistry, Zahony u 7., H-1031 Budapest, Hungary
| | - Matyas Timari
- Servier Research Institute of Medicinal Chemistry, Zahony u 7., H-1031 Budapest, Hungary
| | - Rudolf Kassai
- Servier Research Institute of Medicinal Chemistry, Zahony u 7., H-1031 Budapest, Hungary
| | - Bianka Szokol
- Servier Research Institute of Medicinal Chemistry, Zahony u 7., H-1031 Budapest, Hungary
| | - Attila C. Benyei
- Institute of Chemistry, University of Debrecen, Egyetem ter 1., H-4032 Debrecen, Hungary
| | - Tamás Gáti
- Servier Research Institute of Medicinal Chemistry, Zahony u 7., H-1031 Budapest, Hungary
| | - Attila Paczal
- Servier Research Institute of Medicinal Chemistry, Zahony u 7., H-1031 Budapest, Hungary
| | - Andras Kotschy
- Servier Research Institute of Medicinal Chemistry, Zahony u 7., H-1031 Budapest, Hungary
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8
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Vágvölgyi M, Bélteky P, Bogdán D, Nové M, Spengler G, Latif AD, Zupkó I, Gáti T, Tóth G, Kónya Z, Hunyadi A. Squalenoylated Nanoparticle Pro-Drugs of Adjuvant Antitumor 11α-Hydroxyecdysteroid 2,3-Acetonides Act as Cytoprotective Agents Against Doxorubicin and Paclitaxel. Front Pharmacol 2020; 11:552088. [PMID: 33013388 PMCID: PMC7516204 DOI: 10.3389/fphar.2020.552088] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 04/16/2020] [Accepted: 08/14/2020] [Indexed: 12/14/2022] Open
Abstract
Several ecdysteroid acetonides act as adjuvant chemo-sensitizing agents against various cancer cell lines, and they can be formulated to self-assembling nanoparticle (NP) pro-drugs through a hydrolysable conjugation with squalene. In the bloodstream such squalenoylated nanoparticles dissolve into low-density lipoprotein (LDL) that allows targeting tissues containing high levels of LDL-receptors. In this work, ajugasterone C 2,3;20,22-diacetonide (3) and 11α-hydroxypoststerone 2,3-acetonide (4) were squalenoylated to obtain two new ecdysteroid pro-drugs (6 and 7) and their nano-assemblies (6NP and 7NP). A complete NMR signal assignment of 6 and 7 was achieved. Interaction of compounds 3 and 4 with chemotherapeutics was studied by the Chou-Talalay method. Compound 3 showed strong synergism with doxorubicin on a multi-drug resistant lymphoma cell line. In contrast, its nanoassembly 6NP significantly decreased the cytotoxicity of doxorubicin on these MDR cells, strongly suggesting that at least the 2,3-acetonide group was cleaved by the acidic pH of lysosomes after endocytosis of the prodrug. Further, compound 4 acted in strong antagonism with paclitaxel on MCF-7 cells and its nanoassemby 7NP also protected MCF-7 cells from the effect of paclitaxel. Our results suggest that acid-resistant A-ring substitution would be crucial to design adjuvant antitumor squalenoylated ecdysteroid prodrugs. Additionally, our results may be considered as a serendipitous discovery of a novel way to deliver cytoprotective, adaptogen ecdysteroids to healthy tissues with upregulated LDL-R.
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Affiliation(s)
- Máté Vágvölgyi
- Institute of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged, Szeged, Hungary
| | - Péter Bélteky
- Department of Applied and Environmental Chemistry, Interdisciplinary Excellence Centre, University of Szeged, Szeged, Hungary
| | - Dóra Bogdán
- Department of Organic Chemistry, Semmelweis University, Budapest, Hungary.,Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Budapest, Hungary
| | - Márta Nové
- Department of Medical Microbiology and Immunobiology, University of Szeged, Szeged, Hungary
| | - Gabriella Spengler
- Department of Medical Microbiology and Immunobiology, University of Szeged, Szeged, Hungary
| | - Ahmed D Latif
- Department of Pharmacodynamics and Biopharmacy, Faculty of Pharmacy, University of Szeged, Szeged, Hungary
| | - István Zupkó
- Department of Pharmacodynamics and Biopharmacy, Faculty of Pharmacy, University of Szeged, Szeged, Hungary.,Interdisciplinary Centre for Natural Products, University of Szeged, Szeged, Hungary
| | - Tamás Gáti
- Servier Research Institute of Medicinal Chemistry (SRIMC), Budapest, Hungary
| | - Gábor Tóth
- NMR Group, Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Budapest, Hungary
| | - Zoltán Kónya
- Department of Applied and Environmental Chemistry, Interdisciplinary Excellence Centre, University of Szeged, Szeged, Hungary.,MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, University of Szeged, Szeged, Hungary
| | - Attila Hunyadi
- Institute of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged, Szeged, Hungary.,Interdisciplinary Centre for Natural Products, University of Szeged, Szeged, Hungary
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9
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Sinai Á, Simkó DC, Szabó F, Paczal A, Gáti T, Bényei A, Novák Z, Kotschy A. Synthesis, Structural Analysis and Application of Aryl‐Diadamantyl Phosphine ligands in Palladium Catalyzed Cross‐Coupling Reactions. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000761] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ádám Sinai
- Servier Research Institute of Medicinal Chemistry Záhony utca 7. 1031 Budapest Hungary
- ELTE “Lendület” Catalysis and Organic Synthesis Research Group Institute of Chemistry Eötvös Loránd University Pázmány Péter stny. 1/A 1117 Budapest Hungary
| | - Dániel Cs. Simkó
- ELTE “Lendület” Catalysis and Organic Synthesis Research Group Institute of Chemistry Eötvös Loránd University Pázmány Péter stny. 1/A 1117 Budapest Hungary
| | - Fruzsina Szabó
- ELTE “Lendület” Catalysis and Organic Synthesis Research Group Institute of Chemistry Eötvös Loránd University Pázmány Péter stny. 1/A 1117 Budapest Hungary
| | - Attila Paczal
- Servier Research Institute of Medicinal Chemistry Záhony utca 7. 1031 Budapest Hungary
| | - Tamás Gáti
- Servier Research Institute of Medicinal Chemistry Záhony utca 7. 1031 Budapest Hungary
| | - Attila Bényei
- Department of Pharmaceutical Chemistry University of Debrecen Egyetem tér 1. 4032 Debrecen Hungary
| | - Zoltán Novák
- ELTE “Lendület” Catalysis and Organic Synthesis Research Group Institute of Chemistry Eötvös Loránd University Pázmány Péter stny. 1/A 1117 Budapest Hungary
| | - András Kotschy
- Servier Research Institute of Medicinal Chemistry Záhony utca 7. 1031 Budapest Hungary
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10
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Gáti T, Czímer É, Cserháti G, Fehér J, Oláh M, Kulisch Á, Mándó Z, Bender T. A multicentre randomized controlled follow-up study of the effects of the underwater traction therapy in chronic low back pain. Int J Biometeorol 2020; 64:1393-1400. [PMID: 32361959 PMCID: PMC7374437 DOI: 10.1007/s00484-020-01919-8] [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: 02/04/2020] [Revised: 03/27/2020] [Accepted: 04/10/2020] [Indexed: 06/11/2023]
Abstract
Low back pain (LBP) is one of the most costly diseases in the developed world. This study aimed to investigate the effects of underwater traction therapy on chronic low back pain. The primary objective was to prove that underwater traction therapy has favorable effects on LBP. Our secondary objective was to evaluate whether it also leads to improvement in the quality of life. This is a prospective, multicenter, follow-up study. A total of 176 patients with more than 3 months of low back pain enrolled from outpatient clinics were randomized into three groups: underwater weight bath traction therapy and non-steroidal anti-inflammatory drugs (NSAIDs); weight bath; and only NSAIDs. The following parameters were measured before, right after, and 9 weeks after the 3-week therapy: levels of low back pain in rest and during activity were tested using the visual analogue scale (VAS), the Oswestry Low Back Disability Questionnaire, and the EuroQol-5D-5L Questionnaire.The VAS levels improved significantly (p < 0.05) in both underwater weight bath traction therapy groups by the end of the treatment, whereas the improvement in the third group was not statistically significant. Furthermore, the improvements measured in the groups receiving traction therapy were persistent during the follow-up period. There were no significant changes in the Oswestry Index or the EuroQol-5D-5L without VAS parameters in any of the groups.Based on our results, for patients suffering from LBP pain who underwent underwater weight bath traction therapy, there were favorable impacts on the pain levels at rest or during activity. Clinical trial registration ID: NCT03488498, April 5, 2018.
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Affiliation(s)
- Tamás Gáti
- Rheumatology Department, Polyclinic of The Hospitaller Brothers of St John of God, Árpád fejedelem út 7, Budapest, 1027, Hungary.
| | - Éva Czímer
- Aquarius Experience Bath, Sóstó, Fürdőház tér 2, Nyíregyháza, 4431, Hungary
| | - Györgyi Cserháti
- Medical Department of Bath, Kenézy Gyula University Hospital, Debrecen, Hungary
| | - Judit Fehér
- Hungarospa Hajdúszoboszló Private Limited Company, Hajdúszoboszló, Hungary
| | - Mihály Oláh
- Hungarospa Hajdúszoboszló Private Limited Company, Hajdúszoboszló, Hungary
| | - Ágota Kulisch
- St. Andrew Hospital for Rheumatic Diseases, Hévíz, Hungary
| | | | - Tamás Bender
- Rheumatology Department, Polyclinic of The Hospitaller Brothers of St John of God, Árpád fejedelem út 7, Budapest, 1027, Hungary
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11
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Sinai Á, Simkó DC, Szabó F, Paczal A, Gáti T, Bényei A, Novák Z, Kotschy A. Aryl-Diadamantyl Phosphine Ligands in Palladium-Catalyzed Cross-Coupling Reactions: Synthesis, Structural Analysis, and Application. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901834] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Ádám Sinai
- Servier Research Institute of Medicinal Chemistry; Záhony utca 7. 1031 Budapest Hungary
- ELTE “Lendület” Catalysis and Organic Synthesis Research Group; Institute of Chemistry; Eötvös Loránd University; Pázmány Péter stny. 1/A 1117 Budapest Hungary
| | - Dániel Cs. Simkó
- ELTE “Lendület” Catalysis and Organic Synthesis Research Group; Institute of Chemistry; Eötvös Loránd University; Pázmány Péter stny. 1/A 1117 Budapest Hungary
| | - Fruzsina Szabó
- ELTE “Lendület” Catalysis and Organic Synthesis Research Group; Institute of Chemistry; Eötvös Loránd University; Pázmány Péter stny. 1/A 1117 Budapest Hungary
| | - Attila Paczal
- Servier Research Institute of Medicinal Chemistry; Záhony utca 7. 1031 Budapest Hungary
| | - Tamás Gáti
- Servier Research Institute of Medicinal Chemistry; Záhony utca 7. 1031 Budapest Hungary
| | - Attila Bényei
- Department of Pharmaceutical Chemistry; Institute of Chemistry; University of Debrecen; Egyetem tér 1. H -4032 Debrecen Hungary
| | - Zoltán Novák
- ELTE “Lendület” Catalysis and Organic Synthesis Research Group; Institute of Chemistry; Eötvös Loránd University; Pázmány Péter stny. 1/A 1117 Budapest Hungary
| | - András Kotschy
- Servier Research Institute of Medicinal Chemistry; Záhony utca 7. 1031 Budapest Hungary
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12
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Kovács E, Huszka B, Gáti T, Nyerges M, Faigl F, Mucsi Z. Chemoselective Strategy for the Direct Formation of Tetrahydro-2,5-methanobenzo[ c]azepines or Azetotetrahydroisoquinolines via Regio- and Stereoselective Reactions. J Org Chem 2019; 84:7100-7112. [PMID: 31084024 DOI: 10.1021/acs.joc.9b00798] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The present study reports regio- and highly diastereoselective preparative methods for the synthesis of versatile alkaloid-type compounds from oxiranylmethyl tetrahydroisoquinolines. 2,5-Methanobenzo[ c]azepines or azetidine-fused heterocycles were synthesized in tandem reactions depending on the absence or presence of a BF3 co-reagent. A high functional group tolerance has also been demonstrated. DFT calculations with an explicit solvent model confirmed the proposed reaction mechanisms and the role of kinetic controls on the stereochemical outcome of the reported new methods.
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Affiliation(s)
- Ervin Kovács
- Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest H-1111 Hungary.,Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences , Hungarian Academy of Sciences , Budapest H-1117 Hungary
| | - Balázs Huszka
- Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest H-1111 Hungary
| | - Tamás Gáti
- Servier Research Institute of Medicinal Chemistry , Budapest H-1031 Hungary
| | - Miklós Nyerges
- Servier Research Institute of Medicinal Chemistry , Budapest H-1031 Hungary
| | - Ferenc Faigl
- Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest H-1111 Hungary
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13
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Nekkaa I, Bogdán D, Gáti T, Béni S, Juhász T, Palkó M, Paragi G, Tóth GK, Fülöp F, Mándity IM. Flow-chemistry enabled efficient synthesis of β-peptides: backbone topology vs. helix formation. Chem Commun (Camb) 2019; 55:3061-3064. [DOI: 10.1039/c8cc10147g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Enantiodiscriminative helix formation was observed for β-peptide H14 helices when enantiomers of bridged bicyclic residues were introduced.
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14
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Bogdán D, Haessner R, Vágvölgyi M, Passarella D, Hunyadi A, Gáti T, Tóth G. Stereochemistry and complete 1 H and 13 C NMR signal assignment of C-20-oxime derivatives of posterone 2,3-acetonide in solution state. Magn Reson Chem 2018; 56:859-866. [PMID: 29775488 DOI: 10.1002/mrc.4750] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 04/23/2018] [Accepted: 05/05/2018] [Indexed: 05/26/2023]
Affiliation(s)
- Dóra Bogdán
- Department of Organic Chemistry, Semmelweis University, Hőgyes Endre u. 7, Budapest, H-1092, Hungary
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, Budapest, H-1117, Hungary
| | - Rainer Haessner
- Institute of Organic Chemistry and Biochemistry, Technical University of Munich, Lichtenbergstr. 4, Garching, D-85747, Germany
| | - Máté Vágvölgyi
- Institute of Pharmacognosy, University of Szeged, Eötvös u. 6, Szeged, H-6720, Hungary
| | - Daniele Passarella
- Dipartimento di Chimica, Università degli Studi di Milano, Via Camillo Golgi, 19, Milan, 20133, Italy
| | - Attila Hunyadi
- Institute of Pharmacognosy, University of Szeged, Eötvös u. 6, Szeged, H-6720, Hungary
- Interdisciplinary Centre for Natural Products, University of Szeged, Eötvös u. 6, Szeged, H-6720, Hungary
| | - Tamás Gáti
- Servier Research Institute of Medicinal Chemistry (SRIMC), Záhony utca 7, Budapest, H-1031, Hungary
| | - Gábor Tóth
- Institute of Pharmacognosy, University of Szeged, Eötvös u. 6, Szeged, H-6720, Hungary
- Department of Inorganic and Analytical Chemistry, NMR Group, Budapest University of Technology and Economics, St. Gellért tér 4, Budapest, H-1111, Hungary
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15
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Gáti T, Tefner IK, Kovács L, Hodosi K, Bender T. The effects of the calcium-magnesium-bicarbonate content in thermal mineral water on chronic low back pain: a randomized, controlled follow-up study. Int J Biometeorol 2018; 62:897-905. [PMID: 29322254 DOI: 10.1007/s00484-017-1491-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [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: 10/30/2017] [Revised: 12/07/2017] [Accepted: 12/08/2017] [Indexed: 06/07/2023]
Abstract
The aim of this study was to investigate the effects of balneotherapy on chronic low back pain. This is a minimized, follow-up study evaluated according to the analysis of intention to treat. The subjects included in the study were 105 patients suffering from chronic low back pain. The control group (n = 53) received the traditional musculoskeletal pain killer treatment, while the target group (n = 52) attended thermal mineral water treatment for 3 weeks for 15 occasions on top of the usual musculoskeletal pain killer treatment. The following parameters were measured before, right after, and 9 weeks after the 3-week therapy: the level of low back pain in rest and the level during activity are tested using the Visual Analog Scale (VAS); specific questionnaire on the back pain (Oswestry); and a questionnaire on quality of life (EuroQual-5D). All of the investigated parameters improved significantly (p < 0.001) in the target group by the end of the treatment compared to the base period, and this improvement was persistent during the follow-up period. There were no significant changes in the measured parameters in the control group. Based on our results, balneotherapy might have favorable impact on the clinical parameters and quality of life of patients suffering from chronic low back pain.
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Affiliation(s)
- Tamás Gáti
- Polyclinic of the Hospitaller Brothers of St. John of God, Budapest, Hungary
- Józsefváros Municipal Health Service, Budapest, Hungary
| | | | - Lajos Kovács
- Musculoskeletal Rehabilitation Center, Mezőkövesd, Hungary
| | - Katalin Hodosi
- Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Tamás Bender
- Polyclinic of the Hospitaller Brothers of St. John of God, Budapest, Hungary.
- Budai Irgalmasrendi Kórház, Árpád fejedelem útja 7, Budapest, H-1023, Hungary.
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16
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Gáti T, Tefner IK, Kovács L, Hodosi K, Bender T. Correction to: The effects of the calcium-magnesium-bicarbonate content in thermal mineral water on chronic low back pain: a randomized, controlled follow-up study. Int J Biometeorol 2018; 62:907. [PMID: 29464338 DOI: 10.1007/s00484-018-1505-7] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The original article mistakenly displays each set of author names in the wrong order, i.e., first names as last names and vice versa. The author correct names are: Tamás Gáti, Ildikó Katalin Tefner, Lajos Kovács, Katalin Hodosi, Tamás Bender. The original article has been corrected.
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Affiliation(s)
- Tamás Gáti
- Polyclinic of the Hospitaller Brothers of St. John of God, Budapest, Hungary
- Józsefváros Municipal Health Service, Budapest, Hungary
| | | | - Lajos Kovács
- Musculoskeletal Rehabilitation Center, Mezőkövesd, Hungary
| | - Katalin Hodosi
- Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Tamás Bender
- Polyclinic of the Hospitaller Brothers of St. John of God, Budapest, Hungary.
- Budai Irgalmasrendi Kórház, Árpád fejedelem útja 7, Budapest, 1023, Hungary.
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17
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Vágvölgyi M, Martins A, Kulmány Á, Zupkó I, Gáti T, Simon A, Tóth G, Hunyadi A. Nitrogen-containing ecdysteroid derivatives vs. multi-drug resistance in cancer: Preparation and antitumor activity of oximes, oxime ethers and a lactam. Eur J Med Chem 2018; 144:730-739. [DOI: 10.1016/j.ejmech.2017.12.032] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 12/08/2017] [Accepted: 12/09/2017] [Indexed: 12/27/2022]
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18
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Bankó Z, Pozsgay J, Gáti T, Rojkovich B, Ujfalussy I, Sármay G. Regulatory B cells in rheumatoid arthritis: Alterations in patients receiving anti-TNF therapy. Clin Immunol 2017; 184:63-69. [DOI: 10.1016/j.clim.2017.05.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 03/31/2017] [Accepted: 05/10/2017] [Indexed: 01/20/2023]
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19
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Bankó Z, Pozsgay J, Szili D, Tóth M, Gáti T, Nagy G, Rojkovich B, Sármay G. Induction and Differentiation of IL-10-Producing Regulatory B Cells from Healthy Blood Donors and Rheumatoid Arthritis Patients. J Immunol 2017; 198:1512-1520. [PMID: 28087671 DOI: 10.4049/jimmunol.1600218] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 12/08/2016] [Indexed: 12/15/2022]
Abstract
The most important feature of B cells is the production of Abs upon activation; additionally, B cells produce pro- and anti-inflammatory cytokines in response to certain stimuli. IL-10-producing B cells represent a major subset of regulatory B cells (Bregs) that suppress autoimmune and inflammatory responses. B cells play a crucial role in the development and maintenance of the chronic inflammatory autoimmune disease rheumatoid arthritis (RA); however, controversial data are available on IL-10- producing Bregs in RA. Our aim was to identify the optimal conditions that induce IL-10+ Bregs and, furthermore, to shed light on the signaling pathways that are responsible for their expansion. The results show that dual stimulation by CpG and CD40L for 48 h is optimal for IL-10 induction, and this can be synergistically boosted by IL-21. We identified the CD19+CD27+ memory B cell population as the major source of IL-10+ Bregs. We detected significantly fewer CD19+CD27+IL-10+ cells in RA patients compared with healthy controls, and these were functionally defective in suppressing IFN-γ production by CD4+ T cells in coculture. IL-21 drastically increased the number of IL-10+ Bregs within the CD19+CD27+ and CD19+CD27- populations; furthermore, it induced the appearance of IL-10+Blimp-1+ plasmablasts. Monitoring the phosphorylation of key signaling molecules revealed that activation of ERK, p38, and CREB is indispensable for the induction of IL-10 production, whereas phosphorylation of STAT3 further enhances IL-10 expression in human Bregs. We conclude that CREB and STAT3 are the key transcription factors responsible for the expansion and differentiation of human IL-10-producing Bregs.
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Affiliation(s)
- Zsuzsanna Bankó
- Department of Immunology, Eötvös Loránd University, Budapest, 1117 Hungary
| | - Judit Pozsgay
- Department of Immunology, Eötvös Loránd University, Budapest, 1117 Hungary
| | - Dániel Szili
- Department of Immunology, Eötvös Loránd University, Budapest, 1117 Hungary
| | - Mária Tóth
- Department of Immunology, Eötvös Loránd University, Budapest, 1117 Hungary
| | - Tamás Gáti
- Buda Hospital of Hospitaller Brothers of St. John, Budapest, 1023 Hungary; and
| | - György Nagy
- Buda Hospital of Hospitaller Brothers of St. John, Budapest, 1023 Hungary; and.,Department of Rheumatology, 3rd Department of Internal Medicine, Semmelweis University, Budapest, 1023 Hungary
| | | | - Gabriella Sármay
- Department of Immunology, Eötvös Loránd University, Budapest, 1117 Hungary;
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20
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Berkes B, Ozsváth K, Molnár L, Gáti T, Holczbauer T, Kardos G, Soós T. Expedient and Diastereodivergent Assembly of Terpenoid Decalin Subunits having Quaternary Stereocenters through Organocatalytic Robinson Annulation of Nazarov Reagent. Chemistry 2016; 22:18101-18106. [DOI: 10.1002/chem.201604541] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Indexed: 12/18/2022]
Affiliation(s)
- Barbara Berkes
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Kristóf Ozsváth
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Laura Molnár
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Tamás Gáti
- Servier Research Institute of Medicinal Chemistry; Záhony Street 7 1031 Budapest Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - György Kardos
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Tibor Soós
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
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21
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Gáti T, Simon A, Hunyadi A, Csábi J, Kele Z, Tóth G. New ring-rearranged metabolite of 20-hydroxyecdysone obtained by base-catalyzed auto-oxidation. Magn Reson Chem 2016; 54:391-395. [PMID: 26592169 DOI: 10.1002/mrc.4389] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 10/21/2015] [Accepted: 10/29/2015] [Indexed: 06/05/2023]
Affiliation(s)
- Tamás Gáti
- Department of Inorganic and Analytical Chemistry, NMR Group, Budapest University of Technology and Economics, Szt. Gellért Sq. 4, H-1111, Budapest, Hungary
| | - András Simon
- Department of Inorganic and Analytical Chemistry, NMR Group, Budapest University of Technology and Economics, Szt. Gellért Sq. 4, H-1111, Budapest, Hungary
| | - Attila Hunyadi
- Institute of Pharmacognosy, Faculty of Pharmacy, University of Szeged, Eötvös utca 6, H-6720, Szeged, Hungary
| | - József Csábi
- Institute of Pharmacognosy, Faculty of Pharmacy, University of Szeged, Eötvös utca 6, H-6720, Szeged, Hungary
| | - Zoltán Kele
- Department of Medical Chemistry, University of Szeged, Dóm Sq. 8, H-6720, Szeged, Hungary
| | - Gábor Tóth
- Department of Inorganic and Analytical Chemistry, NMR Group, Budapest University of Technology and Economics, Szt. Gellért Sq. 4, H-1111, Budapest, Hungary
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22
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Szarka E, Huber K, Magyar A, Iliás A, Aradi P, Gáti T, Rojkovich B, Nagy G, Hudecz F, Sármay G. A2.27 Affinity measurements of anti-citrullinated protein/peptide antibodies in sera of rheumatoid arthritis patients by applying biosensor analysis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-209124.62] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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23
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Bankó ZS, Pozsgay J, Tóth M, Gáti T, Nagy G, Rojkovich B, Sármay G. A2.18 Induction and characterisation of the dominant IL-10 producing B cell subset in healthy blood donors and rheumatoid arthritis patients. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-209124.53] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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24
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Csábi J, Hsieh TJ, Hasanpour F, Martins A, Kele Z, Gáti T, Simon A, Tóth G, Hunyadi A. Oxidized Metabolites of 20-Hydroxyecdysone and Their Activity on Skeletal Muscle Cells: Preparation of a Pair of Desmotropes with Opposite Bioactivities. J Nat Prod 2015; 78:2339-45. [PMID: 26465254 DOI: 10.1021/acs.jnatprod.5b00249] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Increasing the activation of protein kinase B (Akt) has been suggested as a key signaling step in the nonhormonal anabolic activity of the phytoecdysteroid 20-hydroxyecdysone (20E) in mammals. Base-catalyzed autoxidation of this compound was shown previously to yield interesting B-ring-modified analogues. Herein is reported a thorough study on this reaction, resulting in the preparation and complete NMR spectroscopic assignments of calonysterone (5) and its previously overlooked desmotropic pair (7), along with two new sensitive metabolites of 20E. The two isomers showed considerable stability in solution. Time dependency of the reaction for yield optimization is also presented; by means of analytical HPLC, the two desmotropes can reach a maximum combined yield of >90%. The activity of these compounds on Akt phosphorylation was tested in murine skeletal muscle cells. Compounds 2 and 5 showed more potent activity than 20E in increasing Akt activation, while compound 7 exerted an opposite effect. As such, the present study provides the first direct evidence for a pair of desmotropes exerting significantly different bioactivities.
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Affiliation(s)
| | - Tusty-Jiuan Hsieh
- Department of Genome Medicine, Kaohsiung Medical University , Kaohsiung 807, Taiwan, Republic of China
| | | | | | | | - Tamás Gáti
- Department of Inorganic and Analytical Chemistry, NMR Group, Budapest University of Technology and Economics , 1111 Budapest, Hungary
| | - András Simon
- Department of Inorganic and Analytical Chemistry, NMR Group, Budapest University of Technology and Economics , 1111 Budapest, Hungary
| | - Gábor Tóth
- Department of Inorganic and Analytical Chemistry, NMR Group, Budapest University of Technology and Economics , 1111 Budapest, Hungary
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25
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Kondacs LA, Pilipecz MV, Mucsi Z, Balázs B, Gáti T, Nyerges M, Dancsó A, Nemes P. Synthesis of Isoxazoline Derivatives Based on Nitrile Oxide Cycloaddition of Nitroso-Nitro-Enamine. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500905] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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26
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Sinai Á, Vangel D, Gáti T, Bombicz P, Novák Z. Utilization of Copper-Catalyzed Carboarylation–Ring Closure for the Synthesis of New Oxazoline Derivatives. Org Lett 2015; 17:4136-9. [DOI: 10.1021/acs.orglett.5b01860] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Ádám Sinai
- MTA-ELTE
“Lendület” Catalysis and Organic Synthesis Research
Group, Institute of Chemistry, Eötvös University, Pázmány
Péter stny. 1/a, H-1117 Budapest, Hungary
| | - Dóra Vangel
- MTA-ELTE
“Lendület” Catalysis and Organic Synthesis Research
Group, Institute of Chemistry, Eötvös University, Pázmány
Péter stny. 1/a, H-1117 Budapest, Hungary
| | - Tamás Gáti
- Servier Research Institute of Medicinal Chemistry, Záhony utca 7, H-1031 Budapest, Hungary
| | - Petra Bombicz
- Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Magyar Tudósok körútja
2, H-1117 Budapest, Hungary
| | - Zoltán Novák
- MTA-ELTE
“Lendület” Catalysis and Organic Synthesis Research
Group, Institute of Chemistry, Eötvös University, Pázmány
Péter stny. 1/a, H-1117 Budapest, Hungary
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27
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Bankó Z, Pozsgay J, Nagy G, Gáti T, Rojkovich B, Sármay G. A1.15 Rheumatoid arthritis patients possess a reduced number of IL-10 producing CD27 +regulatory B cells. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-207259.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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28
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Tolnai GL, Székely A, Makó Z, Gáti T, Daru J, Bihari T, Stirling A, Novák Z. Efficient direct 2,2,2-trifluoroethylation of indoles via C–H functionalization. Chem Commun (Camb) 2015; 51:4488-91. [DOI: 10.1039/c5cc00519a] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Metal free direct trifluoroethylation of unprotected indoles at position 3 via C–H functionalization is presented: straightforward synthesis and DFT studies.
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Affiliation(s)
- Gergely L. Tolnai
- MTA-ELTE “Lendület” Catalysis and Organic Synthesis Research Group
- Institute of Chemistry
- Eötvös University
- Faculty of Science
- Budapest
| | - Anna Székely
- MTA-ELTE “Lendület” Catalysis and Organic Synthesis Research Group
- Institute of Chemistry
- Eötvös University
- Faculty of Science
- Budapest
| | - Zita Makó
- MTA-ELTE “Lendület” Catalysis and Organic Synthesis Research Group
- Institute of Chemistry
- Eötvös University
- Faculty of Science
- Budapest
| | - Tamás Gáti
- Servier Research Institute of Medicinal Chemistry
- H-1031 Budapest
- Hungary
| | - János Daru
- Research Centre for Natural Sciences of the Hungarian Academy of Sciences
- Department of Theoretical Chemistry
- 1117 Budapest
- Hungary
| | - Tamás Bihari
- Research Centre for Natural Sciences of the Hungarian Academy of Sciences
- Department of Theoretical Chemistry
- 1117 Budapest
- Hungary
| | - András Stirling
- Research Centre for Natural Sciences of the Hungarian Academy of Sciences
- Department of Theoretical Chemistry
- 1117 Budapest
- Hungary
| | - Zoltán Novák
- MTA-ELTE “Lendület” Catalysis and Organic Synthesis Research Group
- Institute of Chemistry
- Eötvös University
- Faculty of Science
- Budapest
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29
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Rakonczai P, Nagy B, Rojkovich B, Gáti T. Modelling Dependence Between Disability Status and Health Service Costs of People With Rheumatoid Arthritis in Hungary. Value Health 2014; 17:A551. [PMID: 27201795 DOI: 10.1016/j.jval.2014.08.1797] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- P Rakonczai
- Healthware Consulting Ltd., Budapest, Hungary
| | - B Nagy
- Healthware Consulting Ltd., Budapest, Hungary
| | - B Rojkovich
- Buda Hospital of Hospitaller Brothers of St. John, Budapest, Hungary
| | - T Gáti
- Buda Hospital of Hospitaller Brothers of St. John, Budapest, Hungary
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30
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Lai WC, Dankó B, Csábi J, Kele Z, Chang FR, Pascu ML, Gáti T, Simon A, Amaral L, Tóth G, Hunyadi A. Rapid, laser-induced conversion of 20-hydroxyecdysone - a follow-up study on the products obtained. Steroids 2014; 89:56-62. [PMID: 25150016 DOI: 10.1016/j.steroids.2014.07.016] [Citation(s) in RCA: 9] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 06/23/2014] [Accepted: 07/25/2014] [Indexed: 11/24/2022]
Abstract
We have recently reported the set-up of an experimental system for the laser-induced photochemical modification of bioactive substances, where two ecdysteroids, 20-hydroxyecdysone (20E) and its diacetonide derivative served as probes. As a direct continuation of our previous work, three new compounds together with five other ecdysteroid derivatives, have been identified from the novel, laser-induced photo-transformation reaction of 20E. The structures and NMR signal assignment were established by comprehensive one- and two-dimensional NMR spectroscopy supported by mass spectroscopy. Possible ways for the formation of each species is also discussed. Similar to their parental compound, the products obtained are potentially bioactive and worthy for further investigations; due to the low yields, however, a different approach for their higher scale production is suggested.
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Affiliation(s)
- Wan-Chun Lai
- Institute of Pharmacognosy, University of Szeged, 6720 Szeged, Hungary; Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 807, Taiwan, ROC
| | - Balázs Dankó
- Institute of Pharmacognosy, University of Szeged, 6720 Szeged, Hungary
| | - József Csábi
- Institute of Pharmacognosy, University of Szeged, 6720 Szeged, Hungary
| | - Zoltán Kele
- Department of Medical Chemistry, University of Szeged, 6720 Szeged, Hungary
| | - Fang-Rong Chang
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 807, Taiwan, ROC
| | - Mihail L Pascu
- Laser Department, National Institute for Laser, Plasma and Radiation Physics, Bucharest, Romania
| | - Tamás Gáti
- Department of Inorganic and Analytical Chemistry, NMR Group, Budapest University of Technology and Economics, 1111 Budapest, Hungary
| | - András Simon
- Department of Inorganic and Analytical Chemistry, NMR Group, Budapest University of Technology and Economics, 1111 Budapest, Hungary
| | - Leonard Amaral
- Travel Medicine of the Center for Malaria and Other Tropical Diseases (CMDT), Instituto de Higiene e Medicina Tropical, Universidade Nova de Lisboa, 1349-008 Lisbon, Portugal; Department of Microbiology and Immunobiology, University of Szeged, 6720 Szeged, Hungary
| | - Gábor Tóth
- Department of Inorganic and Analytical Chemistry, NMR Group, Budapest University of Technology and Economics, 1111 Budapest, Hungary.
| | - Attila Hunyadi
- Institute of Pharmacognosy, University of Szeged, 6720 Szeged, Hungary.
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31
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Gonda Z, Kovács S, Wéber C, Gáti T, Mészáros A, Kotschy A, Novák Z. Efficient copper-catalyzed trifluoromethylation of aromatic and heteroaromatic iodides: the beneficial anchoring effect of borates. Org Lett 2014; 16:4268-71. [PMID: 25068681 DOI: 10.1021/ol501967c] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Efficient copper-catalyzed trifluoromethylation of aromatic iodides was achieved with TMSCF3 in the presence of trimethylborate. The Lewis acid was used to anchor the in situ generated trifluoromethyl anion and suppress its rapid decomposition. Broad applicability of the new trifluoromethylating reaction was demonstrated in the functionalization of different aromatic and heteroaromatic iodides.
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Affiliation(s)
- Zsombor Gonda
- MTA-ELTE "Lendület" Catalysis and Organic Synthesis Research Group, Institute of Chemistry, Eötvös Loránd University , Pázmány Péter stny. 1/a, H-1117 Budapest, Hungary
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Soós T, Dorkó É, Varga E, Gáti T, Holczbauer T, Pápai I, Mehdi H. Steric Control of Geminal Lewis Pair Behavior: Frustration Induced Dyotropic Rearrangement. Synlett 2014. [DOI: 10.1055/s-0033-1339125] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Tibor Soós
- Hungarian Academy of Sciences, Research Centre for Natural Sciences, Institute of Organic Chemistry
| | - Éva Dorkó
- Hungarian Academy of Sciences, Research Centre for Natural Sciences, Institute of Organic Chemistry
| | - Eszter Varga
- Hungarian Academy of Sciences, Research Centre for Natural Sciences, Institute of Organic Chemistry
| | - Tamás Gáti
- Servier Research Institute of Medicinal Chemistry
| | - Tamás Holczbauer
- Hungarian Academy of Sciences, Research Centre for Natural Sciences, Institute of Organic Chemistry
| | - Imre Pápai
- Hungarian Academy of Sciences, Research Centre for Natural Sciences, Institute of Organic Chemistry
| | - Hasan Mehdi
- Hungarian Academy of Sciences, Research Centre for Natural Sciences, Institute of Organic Chemistry
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Szili D, Bankó Z, Tóth EA, Nagy G, Rojkovich B, Gáti T, Simon M, Hérincs Z, Sármay G. TGFβ activated kinase 1 (TAK1) at the crossroad of B cell receptor and Toll-like receptor 9 signaling pathways in human B cells. PLoS One 2014; 9:e96381. [PMID: 24801688 PMCID: PMC4011794 DOI: 10.1371/journal.pone.0096381] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Accepted: 04/07/2014] [Indexed: 11/18/2022] Open
Abstract
B cell development and activation are regulated by combined signals mediated by the B cell receptor (BCR), receptors for the B-cell activating factor of the tumor necrosis factor family (BAFF-R) and the innate receptor, Toll-like receptor 9 (TLR9). However, the underlying mechanisms by which these signals cooperate in human B cells remain unclear. Our aim was to elucidate the key signaling molecules at the crossroads of BCR, BAFF-R and TLR9 mediated pathways and to follow the functional consequences of costimulation.Therefore we stimulated purified human B cells by combinations of anti-Ig, B-cell activating factor of the tumor necrosis factor family (BAFF) and the TLR9 agonist, CpG oligodeoxynucleotide. Phosphorylation status of various signaling molecules, B cell proliferation, cytokine secretion, plasma blast generation and the frequency of IgG producing cells were investigated. We have found that BCR induced signals cooperate with BAFF-R- and TLR9-mediated signals at different levels of cell activation. BCR and BAFF- as well as TLR9 and BAFF-mediated signals cooperate at NFκB activation, while BCR and TLR9 synergistically costimulate mitogen activated protein kinases (MAPKs), ERK, JNK and p38. We show here for the first time that the MAP3K7 (TGF beta activated kinase, TAK1) is responsible for the synergistic costimulation of B cells by BCR and TLR9, resulting in an enhanced cell proliferation, plasma blast generation, cytokine and antibody production. Specific inhibitor of TAK1 as well as knocking down TAK1 by siRNA abrogates the synergistic signals. We conclude that TAK1 is a key regulator of receptor crosstalk between BCR and TLR9, thus plays a critical role in B cell development and activation.
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Affiliation(s)
- Dániel Szili
- Department of Immunology, Eötvös Loránd University, Budapest, Hungary
| | - Zsuzsanna Bankó
- Department of Immunology, Eötvös Loránd University, Budapest, Hungary
| | | | - György Nagy
- Buda Hospital of Hospitaller Brothers of St. John, Budapest, Hungary
- Department of Rheumatology, Semmelweis University, Budapest, Hungary
| | | | - Tamás Gáti
- Buda Hospital of Hospitaller Brothers of St. John, Budapest, Hungary
| | - Melinda Simon
- Department of Immunology, Eötvös Loránd University, Budapest, Hungary
| | - Zoltán Hérincs
- Department of Immunology, Eötvös Loránd University, Budapest, Hungary
| | - Gabriella Sármay
- Department of Immunology, Eötvös Loránd University, Budapest, Hungary
- * E-mail:
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Szarka E, Babos F, Magyar A, Huber K, Szittner Z, Papp K, Prechl J, Pozsgay J, Neer Z, Ádori M, Nagy G, Rojkovich B, Gáti T, Kelemen J, Baka Z, Brózik M, Pazár B, Poór G, Hudecz F, Sármay G. Recognition of new citrulline-containing peptide epitopes by autoantibodies produced in vivo and in vitro by B cells of rheumatoid arthritis patients. Immunology 2014; 141:181-91. [PMID: 24116744 DOI: 10.1111/imm.12175] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [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: 07/17/2013] [Revised: 09/09/2013] [Accepted: 09/24/2013] [Indexed: 12/18/2022] Open
Abstract
Anti-citrullinated peptide/protein antibodies (ACPAs) are highly sensitive and specific markers of rheumatoid arthritis (RA). Identification of peptide epitopes that may detect different subgroups of RA patients might have diagnostic and prognostic significance. We have investigated citrulline- and arginine-containing peptide pairs derived from filaggrin, collagen or vimentin, and compared this citrulline-peptide panel with the serological assays conventionally used to detect ACPAs. Furthermore, we studied if the same citrulline-peptides identify antibody-secreting cells in in vitro cultures of RA B cells. Recognition of citrulline- and arginine-containing filaggrin, vimentin and collagen peptide epitopes were tested by Multipin ELISA system, by indirect ELISA and by a peptide-specific microarray. B cells were purified from blood by negative selection; antibody-producing cells were enumerated by ELISPOT assay. The panel composed of citrulline-peptide epitopes of filaggrin, collagen and vimentin was recognized by RA sera with a sensitivity and specificity comparable with the currently used tests. Moreover, the combined citrulline-peptide panel including the new short epitope peptide of filaggrin, fil311-315, also identified nearly one-third of RA cases that were negative for antibodies against cyclic citrullinated peptides, mutated citrullinated vimentin or for rheumatoid factor. The results with the peptide-specific microarray have shown that although most ACPAs recognizing the four citrulline peptides are IgG, some of them specifically recognizing citrulline-containing filaggrin peptides (fil311-315 and fil306-326) are IgM, and so may be produced either by newly formed activated B cells or by unswitched B memory cells. Furthermore, the citrulline-peptides of filaggrin and vimentin detect ACPA-producing cells, and so could also be applied to study the B cells of RA patients.
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Affiliation(s)
- Eszter Szarka
- Department of Immunology, Eötvös Loránd University, Budapest, Hungary
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Sinai Á, Mészáros Á, Gáti T, Kudar V, Palló A, Novák Z. Copper-Catalyzed Oxidative Ring Closure and Carboarylation of 2-Ethynylanilides. Org Lett 2013; 15:5654-7. [DOI: 10.1021/ol402600r] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Ádám Sinai
- MTA-ELTE “Lendület” Catalysis and Organic Synthesis Research Group, Institute of Chemistry, Eötvös University, Pázmány Péter stny. 1/a, H-1117 Budapest, Hungary, Servier Research Institute of Medicinal Chemistry, Záhony utca 7, H-1031 Budapest, Hungary, and Research Centre for Natural Sciences, Hungarian Academy of Sciences, Pusztaszeri út 59-67, H-1025 Budapest, Hungary
| | - Ádám Mészáros
- MTA-ELTE “Lendület” Catalysis and Organic Synthesis Research Group, Institute of Chemistry, Eötvös University, Pázmány Péter stny. 1/a, H-1117 Budapest, Hungary, Servier Research Institute of Medicinal Chemistry, Záhony utca 7, H-1031 Budapest, Hungary, and Research Centre for Natural Sciences, Hungarian Academy of Sciences, Pusztaszeri út 59-67, H-1025 Budapest, Hungary
| | - Tamás Gáti
- MTA-ELTE “Lendület” Catalysis and Organic Synthesis Research Group, Institute of Chemistry, Eötvös University, Pázmány Péter stny. 1/a, H-1117 Budapest, Hungary, Servier Research Institute of Medicinal Chemistry, Záhony utca 7, H-1031 Budapest, Hungary, and Research Centre for Natural Sciences, Hungarian Academy of Sciences, Pusztaszeri út 59-67, H-1025 Budapest, Hungary
| | - Veronika Kudar
- MTA-ELTE “Lendület” Catalysis and Organic Synthesis Research Group, Institute of Chemistry, Eötvös University, Pázmány Péter stny. 1/a, H-1117 Budapest, Hungary, Servier Research Institute of Medicinal Chemistry, Záhony utca 7, H-1031 Budapest, Hungary, and Research Centre for Natural Sciences, Hungarian Academy of Sciences, Pusztaszeri út 59-67, H-1025 Budapest, Hungary
| | - Anna Palló
- MTA-ELTE “Lendület” Catalysis and Organic Synthesis Research Group, Institute of Chemistry, Eötvös University, Pázmány Péter stny. 1/a, H-1117 Budapest, Hungary, Servier Research Institute of Medicinal Chemistry, Záhony utca 7, H-1031 Budapest, Hungary, and Research Centre for Natural Sciences, Hungarian Academy of Sciences, Pusztaszeri út 59-67, H-1025 Budapest, Hungary
| | - Zoltán Novák
- MTA-ELTE “Lendület” Catalysis and Organic Synthesis Research Group, Institute of Chemistry, Eötvös University, Pázmány Péter stny. 1/a, H-1117 Budapest, Hungary, Servier Research Institute of Medicinal Chemistry, Záhony utca 7, H-1031 Budapest, Hungary, and Research Centre for Natural Sciences, Hungarian Academy of Sciences, Pusztaszeri út 59-67, H-1025 Budapest, Hungary
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Szarka E, Huber K, Pozsgay J, Babos F, Gáti T, Magyar A, Hudecz F, Rojkovich B, Nagy G, Sármay G. A5.11 Detection of ACPA Producing B-Cells by a Citrulline Peptide Panel. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-203219.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Marosi A, Szalay Z, Béni S, Szakács Z, Gáti T, Rácz Á, Noszál B, Demeter Á. Solution-state NMR spectroscopy of famotidine revisited: spectral assignment, protonation sites, and their structural consequences. Anal Bioanal Chem 2011; 402:1653-66. [DOI: 10.1007/s00216-011-5599-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2011] [Revised: 11/18/2011] [Accepted: 11/20/2011] [Indexed: 10/14/2022]
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Gáti T, Pajor A, Géher P, Nagy G. [Systemic lupus erythematosus and pregnancy]. Orv Hetil 2008; 149:723-31. [PMID: 18426719 DOI: 10.1556/oh.2008.28295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Systemic Lupus Erythematosus (SLE) is a disease primarily targeting fertile women. The odds of spontaneous miscarriage, preeclampsia, intrauterine growth restriction is higher in pregnant women with SLE as well as there are increased risks of preterm delivery and perinatal fetal death. The occurrence of spontaneous abortion is closely related to the presence of antiphospholipid antibodies. The disease on its own is not a contraindication of pregnancy but at least a six-month remission is suggested prior conception. The physiological changes in the course of pregnancy might have close resemblance to the symptoms of lupus, therefore these changes should be differentiated from symptoms caused by lupus. For mothers suffering from SLE, regular visits not only to their obstetricians but also to a rheumatologist are also recommended in order to allow at proper time recognition of potential complications and their appropriate treatment. Thorough check of the maternal disease is of high importance not only during but also prior to and following pregnancy. An overview is given of the opportunities of recent diagnosis and opportunities of therapeutic approaches including biological as well as stem cell treatments. The antithrombotics treatment increases the chance of survival and healthy child birth in the case of pregnant women suffering from antiphospholipid syndrome. Although occurring rarely, neonatal SLE has significantly higher morbidity and mortality compared to healthy births. Recent studies show positive results in the case of prophylactic treatment of neonatal lupus. Prenatal care is recommended to be conducted at an institute where the obstetrician is experienced in the possible complications of lupus and where consultation with a rheumatologist, and the treatment of neonates with low birth weight are ensured.
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Affiliation(s)
- Tamás Gáti
- Semmelweis Egyetem, Altalános Orvostudományi Kar, Budai Irgalmasrendi Kórház, III. Belgyógyászati Klinika, Reumatológiai és Fizioterápiás Tanszéki Csoport, Budapest.
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Borza I, Bozó E, Barta-Szalai G, Kiss C, Tárkányi G, Demeter A, Gáti T, Háda V, Kolok S, Gere A, Fodor L, Nagy J, Galgóczy K, Magdó I, Agai B, Fetter J, Bertha F, Keserü GM, Horváth C, Farkas S, Greiner I, Domány G. Selective NR1/2B N-methyl-D-aspartate receptor antagonists among indole-2-carboxamides and benzimidazole-2-carboxamides. J Med Chem 2007; 50:901-14. [PMID: 17290978 DOI: 10.1021/jm060420k] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
(4-Benzylpiperidine-1-yl)-(6-hydroxy-1H-indole-2-yl)-methanone (6a) derived from (E)-1-(4-benzylpiperidin-1-yl)-3-(4-hydroxy-phenyl)-propenone (5) was identified as a potent NR2B subunit-selective antagonist of the NMDA receptor. To establish the structure-activity relationship (SAR) and to attempt the improvement of the ADME properties of the lead, a series of compounds were prepared and tested. Several derivatives showed low nanomolar activity both in the binding and in the functional assay. In a formalin-induced hyperalgesia model in mice, 6a and (4-benzylpiperidine-1-yl)-[5(6)-hydroxy-1H-benzimidazol-2-yl]-methanone (60a) were as active as besonprodil (2) after oral administration. A CoMSIA model was developed based on binding data of a series of indole- and benzimidazole-2-carboxamides.
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Affiliation(s)
- István Borza
- Gedeon Richter Ltd., Budapest 10, POB 27, H-1475, Hungary.
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40
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Duddeck H, Malik S, Moeller S, Gáti T, Tóth G, Rozwadowski Z. Chirality Recognition of Selenium Compounds by NMR Spectroscopy in the Presence of a Chiral Dirhodium Complex. PHOSPHORUS SULFUR 2007. [DOI: 10.1080/10426500590905905] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
| | | | - S. Moeller
- a Hannover University , Hannover , Germany
| | - Tamás Gáti
- b Budapest University of Technology and Economics , Budapest , Hungary
| | - Gábor Tóth
- b Budapest University of Technology and Economics , Budapest , Hungary
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Borza I, Greiner I, Kolok S, Galgóczy K, Ignácz-Szendrei G, Horváth C, Farkas S, Gáti T, Háda V, Domány G. New benzoyl urea derivatives as novel NR2B selective NMDA receptor antagonists. Pharmazie 2006; 61:799-800. [PMID: 17020160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
A novel series of benzoyl urea derivatives was prepared and identified as NR2B selective NMDA receptor antagonists. The influence of the substitution of the piperidine ring on the biological activity of the compounds was studied. Compound 9 was active in the formalin test in mice.
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Affiliation(s)
- I Borza
- Gedeon Richter Ltd, Budapest, Hungary.
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Németh B, Wéber C, Veszprémi T, Gáti T, Demeter A. Carbon protonation of 2,4,6-triaminopyrimidines: synthesis, NMR studies, and theoretical calculations. J Org Chem 2006; 71:4910-8. [PMID: 16776521 DOI: 10.1021/jo0605703] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Several C5-substituted 2,4,6-triaminopyrimidine derivatives and their HBF4 salts were synthesized to study the carbon protonation of the pyrimidine ring. NMR investigations in DMSO-d6 prove experimentally that, in addition to the usual protonation at N1, the compounds can be protonated at C5 as well. We present several new stable cationic sigma-complexes in the pyrimidine series, where C5 protonation predominates over N1 protonation. Quantum chemical calculations using the B3LYP/cc-pVDZ method were utilized in the gas phase and also in DMSO solvent with the polarized continuum model (PCM) method to rationalize the observed protonation behavior. Results of the calculations accord with the experimental observations and prove that combined steric and electronic effects are responsible for the observed C5 protonation and for sigma-complex stability. We demonstrate that C5 protonation is a general feature of the 2,4,6-triaminopyrimidine system.
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Affiliation(s)
- Balázs Németh
- Department of Inorganic Chemistry, Budapest University of Technology and Economics, Gellért tér 4, H-1521 Budapest, Hungary
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43
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Gáti T, Tóth G, Drabowicz J, Moeller S, Hofer E, Polavarapu P, Duddeck H. Effective enantiodifferentiation of spirochalcogenuranes by the dirhodium method: Towards the determination of absolute configurations? Chirality 2005; 17 Suppl:S40-7. [PMID: 15736171 DOI: 10.1002/chir.20103] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The properties of chiral spirochalcogenuranes acting as ligands in adducts with a chiral dirhodium tetracarboxylate complex is explored, and the individual adduct species are characterized by low-temperature NMR spectroscopy. Chiral recognition and the determination of enantiomeric composition of the chiral spirochalcogenuranes is easy by evaluating NMR signal dispersions both at low and at room- or slightly elevated temperatures. The uniformity in the signs of 1H dispersion effects and taking reference to the spiroselenurane with known absolute configuration [(S)-(-)-2] indicates that a convenient rule for the determination of absolute configuration in the spirochalcogenurane system can be established on the basis of 1H chemical shift dispersions.
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Affiliation(s)
- Tamás Gáti
- Institute for General and Analytical Chemistry of the Budapest University of Technology and Economics, Budapest, Hungary
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Gáti T, Simon A, Tóth G, Magiera D, Moeller S, Duddeck H. Adducts of Rh2[MTPA]4 with some phosphine chalcogenides: nature of binding and ligand exchange. Magn Reson Chem 2004; 42:600-604. [PMID: 15181630 DOI: 10.1002/mrc.1388] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Adducts of four phosphine chalcogenides with the chiral dirhodium complex ([Rh-Rh]) were investigated by variable-temperature 1H and 31P NMR spectroscopy in order to compare their properties as axial ligands. Whereas the selenide (1) and the sulfide (2) are strong ligands with electrostatic attraction and, in addition, a significant orbital (HOMO-LUMO) interaction, the phosphine oxide compounds (P=O) bind primarily via electrostatic attraction and are relatively weak donors. Moreover, the overall bond strength in these adducts depends on steric congestion around the P=O group.
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Affiliation(s)
- Tamás Gáti
- Institute for General and Analytical Chemistry, Budapest University of Technology and Economics, Szent Gellért tér 4, H-1111 Budapest, Hungary
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Gáti T, Simon A, Tóth G, Szmigielska A, Maj A, Pietrusiewicz K, Moeller S, Magiera D, Duddeck H. Bis(phosphane oxide) Adducts of Rh
2
(MTPA)
4
— Kinetics and Chirality Discrimination. Eur J Inorg Chem 2004. [DOI: 10.1002/ejic.200300853] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tamás Gáti
- Institute for General and Analytical Chemistry of the Budapest University of Technology and Economics, Szent Gellért tér 4, 1111 Budapest, Hungary, Fax: (internat.) +36‐1‐463‐3408
| | - András Simon
- Institute for General and Analytical Chemistry of the Budapest University of Technology and Economics, Szent Gellért tér 4, 1111 Budapest, Hungary, Fax: (internat.) +36‐1‐463‐3408
| | - Gábor Tóth
- Institute for General and Analytical Chemistry of the Budapest University of Technology and Economics, Szent Gellért tér 4, 1111 Budapest, Hungary, Fax: (internat.) +36‐1‐463‐3408
| | - Anna Szmigielska
- Maria Curie‐Sklodowska University, Department of Organic Chemistry, Lublin, Poland, Fax: (internat.) +48‐81‐524‐2251
| | - Anna M. Maj
- Maria Curie‐Sklodowska University, Department of Organic Chemistry, Lublin, Poland, Fax: (internat.) +48‐81‐524‐2251
| | - K. Michał Pietrusiewicz
- Maria Curie‐Sklodowska University, Department of Organic Chemistry, Lublin, Poland, Fax: (internat.) +48‐81‐524‐2251
- Polish Academy of Sciences, Institute of Organic Chemistry, ul. Kasprzaka 44/52, 01‐224 Warsaw, Poland, Fax: (internat.) +48‐22‐632 6681
| | - Stefan Moeller
- Hannover University, Institute of Organic Chemistry, Schneiderberg 1B, 30167 Hannover, Germany, Fax: (internat.) +49‐511‐762‐4616
| | - Damian Magiera
- Hannover University, Institute of Organic Chemistry, Schneiderberg 1B, 30167 Hannover, Germany, Fax: (internat.) +49‐511‐762‐4616
| | - Helmut Duddeck
- Hannover University, Institute of Organic Chemistry, Schneiderberg 1B, 30167 Hannover, Germany, Fax: (internat.) +49‐511‐762‐4616
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Ahmed AA, Gáti T, Hussein TA, Ali AT, Tzakou OA, Couladis MA, Mabry TJ, Tóth G. Ligustolide A and B, two novel sesquiterpenes with rare skeletons and three 1,10-seco-guaianolide derivatives from Achillea ligustica. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00572-6] [Citation(s) in RCA: 28] [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] [Indexed: 10/27/2022]
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47
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Rozwadowski Z, Malik S, Tóth G, Gáti T, Duddeck H. Dirhodium tetraacylate complexes and monovalent ligands. Adduct formation in solution as monitored by NMR spectroscopy. Dalton Trans 2003. [DOI: 10.1039/b207961e] [Citation(s) in RCA: 13] [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: 11/21/2022]
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48
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Bozó E, Gáti T, Demeter A, Kuszmann J. Synthesis of 4-cyano and 4-nitrophenyl 1,6-dithio-D-manno-, L-ido- and D-glucoseptanosides possessing antithrombotic activity. Carbohydr Res 2002; 337:1351-65. [PMID: 12204618 DOI: 10.1016/s0008-6215(02)00128-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
1,6-Anhydro-3,4-O-isopropylidene-1-thio-D-mannitol was converted into its sulfoxide which after hydrolysis, acetylation and subsequent Pummerer rearrangement gave the penta-O-acetyl-1-thio-D-mannoseptanose anomers in excellent yield. This anomeric mixture was used as donor for the glycosylation of 4-nitro- and 4-cyanobenzenethiol in the presence of boron trifluoride etherate and trimethylsilyl triflate, respectively, to yield the corresponding thioseptanosides in high yield. The same strategy was applied for the synthesis of the corresponding L-idothioseptanosides using 1,6-anhydro-3,4-O-isopropylidene-1-thio-L-iditol as starting material. The penta-O-acetyl-D-glucothioseptanose donors could not be synthesised the same way, as the Pummerer reaction of the corresponding tetra-O-acetyl-1,6-thioanhydro-1-thio-D-glucitol sulfoxides led to an inseparable mixture of the corresponding L-gulo- and D-glucothioseptanose anomers. Therefore, D-glucose diethyl dithioacetal was converted via its 2,3,4,5-tetra-O-acetyl-6-S-acetyl derivative into an anomeric mixture of its 6-thio-septanose and -furanose peracetates which could be separated by column chromatography. Condensation of the 6-thio-glucoseptanose peracetates with 4-cyano- and 4-nitrobenezenethiol in the presence of boron trifluoride etherate afforded anomeric mixtures of the corresponding thioseptanosides. The D-manno-, L-ido- and D-glucothioseptanosides obtained after Zemplén deacetylation of these mixtures were tested for their oral antithrombotic activity.
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Affiliation(s)
- Eva Bozó
- Chemical Works of Gedeon Richter Ltd., PO Box 27, H-1475 Budapest, Hungary
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Weckerle B, Gáti T, Tóth G, Schreier P. 3-Methylbutanoyl and 3-methylbut-2-enoyl disaccharides from green coffee beans (Coffea arabica). Phytochemistry 2002; 60:409-414. [PMID: 12031434 DOI: 10.1016/s0031-9422(02)00042-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Three 3-methylbutanoyl and 3-methylbut-2-enoyl disaccharides isolated from green coffee beans (Coffea arabica) were identified as 3-methylbutanoyl-1-O-beta-D-glucopyranosyl-beta-D-apiofuranoside, 3-methylbutanoyl-6-O-alpha-D-glucopyranosyl-beta-D-fructofuranoside, and 3-methylbut-2-enoyl-1-O-beta-D-glucopyranosyl-beta-D-apiofuranoside. The structures were established by one- and two-dimensional 1H and 13C NMR spectra as well as by ESI MS/MS spectra.
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Affiliation(s)
- Bernhard Weckerle
- Lehrstuhl für Lebensmittelchemie, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
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Ahmed AA, Mahmoud AA, Ali ET, Tzakou O, Couladis M, Mabry TJ, Gáti T, Tóth G. Two highly oxygenated eudesmanes and 10 lignans from Achillea holosericea. Phytochemistry 2002; 59:851-856. [PMID: 11937165 DOI: 10.1016/s0031-9422(01)00442-3] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Two new highly oxygenated eudesmanes and 10 known lignans were isolated from the aerial parts of Achillea holosericea. Their structures were elucidated by extensive application of one- and two-dimensional 1H and 13C NMR spectroscopy.
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Affiliation(s)
- Ahmed A Ahmed
- Department of Chemistry, Faculty of Science, El-Minia University, 61519, El-Minia, Egypt.
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