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Nagy J, Jecker P, Podzimek J. [Obstructed nasal breathing with eyelid swelling]. HNO 2024; 72:204-206. [PMID: 37861740 DOI: 10.1007/s00106-023-01382-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/28/2023] [Indexed: 10/21/2023]
Affiliation(s)
- J Nagy
- Klinik für Hals-Nasen-Ohrenheilkunde und Plastische Kopf-Hals-Chirurgie, Klinikum Bad Salzungen, Lindigallee 3, 36433, Bad Salzungen, Deutschland
| | - P Jecker
- Klinik für Hals-Nasen-Ohrenheilkunde und Plastische Kopf-Hals-Chirurgie, Klinikum Bad Salzungen, Lindigallee 3, 36433, Bad Salzungen, Deutschland
| | - J Podzimek
- Klinik für Hals-Nasen-Ohrenheilkunde und Plastische Kopf-Hals-Chirurgie, Klinikum Bad Salzungen, Lindigallee 3, 36433, Bad Salzungen, Deutschland.
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2
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Mousavi SMN, Illés A, Bojtor C, Demeter C, Zsuzsanna B, Vad A, Abakeer RA, Sidahmed HMI, Nagy J. Quantitative and qualitative yield in sweet maize hybrids. BRAZ J BIOL 2024; 84:e265735. [DOI: 10.1590/1519-6984.265735] [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] [Received: 06/27/2022] [Accepted: 07/27/2022] [Indexed: 11/21/2022] Open
Abstract
Abstract Today, sweet corn is considered an important vegetable due to its high sugar content and low starch content. Cluster analysis and variance analysis showed that hybrids had variations in yield indices. GB, DE and GS hybrids had similar performance on indices. SE hybrid that has significant performance on zeaxanthin. Biplot showed that fructose, glucose, sucrose and potassium had stability value on hybrids. All the hybrids had the best performance on fructose, glucose, sucrose and potassium factors. Factor biplot positively correlated with yield indices, including calcium, iron, zinc, magnesium, α-Carotene, 9Z-β-Carotene, phosphorus, and β-carotene. On the other hand, there is a positive correlation with fructose, glucose, potassium, lutein, sucrose, β-Cryptoxanthin, and zeaxanthin. So, to evaluate or increase lutein and zeaxanthin, the other parameters like sugar content (fructose, glucose, and sucrose) are important factors and have an effect together. Factor analysis and biplot showed that ME hybrid had a maximum performance on the first factor of yield indices. Also, the second factor of yield indices had a maxi-mum effect on NO hybrids. SE hybrids had maximum performance in zeaxanthin and GS hybrid had maximum performance in zinc, phosphorus, and iron. The dry matter had stability on DB hybrid.
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Affiliation(s)
| | | | | | | | | | - A. Vad
- University of Debrecen, Hungary
| | | | - H. M. I. Sidahmed
- University of Debrecen, Hungary; National Center for Research, Sudan
| | - J. Nagy
- University of Debrecen, Hungary
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3
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Shojaei SH, Mostafavi K, Bihamta M, Omrani A, Bojtor C, Illes A, Szabo A, Vad A, Nagy J, Harsányi E, Mousavi SMN. Selection of maize hybrids based on genotype × yield × trait (GYT) in different environments. BRAZ J BIOL 2023; 84:e272093. [PMID: 37283408 DOI: 10.1590/1519-6984.272093] [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] [Received: 02/15/2023] [Accepted: 03/16/2023] [Indexed: 06/08/2023] Open
Abstract
This study aimed to identify the best genotypes using the genotype × yield × trait (GYT) method. To investigate the relationships was performed between yield × traits in four regions of Karaj, Birjand, Shiraz and Arak in two cropping years in a randomized complete block design (RCBD) with three replications. The average grain yield in four regions and two years of the experiment was calculated as 5966 kg/ha, and GYT was obtained based on the multiplication of grain yield with different traits. Comparing the average effect of genotype × year in different environments showed that KSC703 and KSC707 hybrids are among the most productive hybrids among the studied genotypes in grain yield. By examining the correlation coefficients between yield × traits in the tested areas, Y × TWG with Y × GW, Y × NRE, Y × NGR and Y × EL, Y × ED with Y × NGR, Y × NRE with Y × GW and the combination of Y × GW with Y × GL had a positive and significant correlation in all regions. The correlation diagrams were drawn on the evaluated areas' data and showed the correlation of most compounds except Y × GT with each other. Based on the analysis of the main components, the first three components explained the greatest diversity in the population. They were named the component ear grain profile, grain thickness component and plant height profile component.
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Affiliation(s)
- S H Shojaei
- Islamic Azad University, Science and Research Branch, Department of Biotechnology and Plant Breeding, Tehran, Iran
| | - K Mostafavi
- Islamic Azad University, Department of Agronomy and Plant Breeding, Karaj, Iran
| | - M Bihamta
- University of Tehran, College of Agriculture & Natural Resources - UCAN, Karaj, Iran
| | - A Omrani
- Ardabil Agricultural and Natural Resources Research and Education Center - AREEO, Crop and Horticultural Science Research Department, Moghan, Iran
| | - C Bojtor
- University of Debrecen, Institute of Land Use, Engineering and Precision Farming Technology, Debrecen, Hungary
| | - A Illes
- University of Debrecen, Institute of Land Use, Engineering and Precision Farming Technology, Debrecen, Hungary
| | - A Szabo
- University of Debrecen, Institute of Land Use, Engineering and Precision Farming Technology, Debrecen, Hungary
| | - A Vad
- University of Debrecen, Institutes for Agricultural Research and Educational Farm - IAREF, Farm and Regional Research Institutes of Debrecen - RID, Experimental Station of Látókép, Debrecen, Hungary
| | - J Nagy
- University of Debrecen, Institute of Land Use, Engineering and Precision Farming Technology, Debrecen, Hungary
| | - E Harsányi
- University of Debrecen, Institute of Land Use, Engineering and Precision Farming Technology, Debrecen, Hungary
| | - S M N Mousavi
- University of Debrecen, Institute of Land Use, Engineering and Precision Farming Technology, Debrecen, Hungary
- Dalhousie University, Faculty of Agriculture, Department of Plant, Food, Environmental Sciences, Truro, Nova Scotia, Canada
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Mousavi SMN, Illés A, Szabó A, Shojaei SH, Demeter C, Bakos Z, Vad A, Széles A, Nagy J, Bojtor C. Stability yield indices on different sweet corn hybrids based on AMMI analysis. BRAZ J BIOL 2023; 84:e270680. [PMID: 36921158 DOI: 10.1590/1519-6984.270680] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Accepted: 01/13/2023] [Indexed: 03/12/2023] Open
Abstract
Currently, sweet corn is considered an important crop due to its high sugar content and low starch content. Important sugars in sweet corn include sucrose, fructose, glucose, and maltose. The purpose of the present study was to use the yield indices of the eight examined sweet corn hybrids and the correlation of the yield indices together. Concentration is important for consumers in terms of yield indices. The research site was located at the Látókép Experimental Station of the University of Debrecen. The small plot experiment had a strip plot design with four replications. The previous crop was sweet corn; the plant density was 64 thousand/ha. The obtained result indicates that Biplot AMMI based on IPCA1 showed that the DB, NO, GS, and GB hybrids had stability and high performance in terms of yield indices. At the same time, fructose and glucose had stable parameters for the hybrids involved in the study. IPCA1 AMMI biplot showed that the ME hybrid had stability and high performance in terms of iron and zinc as well. IPCA2 AMMI biplot showed that DE, GB, and GS hybrids had stability and the highest performance on yield parameters in the scope of the research. Fructose, glucose, and sucrose had stable parameters on hybrids based on IPCA2. The DB and SE hybrids had desirable performance in Lutein and Zeaxanthin based on the biplot. The DE hybrid had a maximum performance on iron and zinc parameters.
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Affiliation(s)
- S M N Mousavi
- University of Debrecen, Faculty of Agricultural and Food Sciences and Environmental Management, Institute of Land Use, Engineering and Precision Farming Technology, Debrecen, Hungary
- Dalhousie University, Faculty of Agriculture, Department of Plant, Food, and Environmental Sciences, Halifax, Canada
| | - A Illés
- University of Debrecen, Faculty of Agricultural and Food Sciences and Environmental Management, Institute of Land Use, Engineering and Precision Farming Technology, Debrecen, Hungary
| | - A Szabó
- University of Debrecen, Faculty of Agricultural and Food Sciences and Environmental Management, Institute of Land Use, Engineering and Precision Farming Technology, Debrecen, Hungary
| | - S H Shojaei
- Islamic Azad University, Faculty of Agriculture and Food Science and Technology, Science and Research Branch, Department of Biotechnology and Plant Breeding, Tehran, Iran
| | - C Demeter
- University of Debrecen, Faculty of Agricultural and Food Sciences and Environmental Management, Institute of Land Use, Engineering and Precision Farming Technology, Debrecen, Hungary
| | - Z Bakos
- University of Debrecen, Faculty of Agricultural and Food Sciences and Environmental Management, Institute of Land Use, Engineering and Precision Farming Technology, Debrecen, Hungary
| | - A Vad
- University of Debrecen, Institutes for Agricultural Research and Educational Farm (IAREF), Farm and Regional Research Institutes of Debrecen (RID), Experimental Station of Látókép, Debrecen, Hungary
| | - A Széles
- University of Debrecen, Faculty of Agricultural and Food Sciences and Environmental Management, Institute of Land Use, Engineering and Precision Farming Technology, Debrecen, Hungary
| | - J Nagy
- University of Debrecen, Faculty of Agricultural and Food Sciences and Environmental Management, Institute of Land Use, Engineering and Precision Farming Technology, Debrecen, Hungary
| | - C Bojtor
- University of Debrecen, Faculty of Agricultural and Food Sciences and Environmental Management, Institute of Land Use, Engineering and Precision Farming Technology, Debrecen, Hungary
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Ács V, Áprily S, Nagy J, Kacsala L, Tossenberger J, Szeli NK, Halas V. Multiple Effects of Egg Weight, in Ovo Carbohydrates, and Sex of Birds on Posthatch Performance in Broilers. Vet Sci 2022; 9:vetsci9090491. [PMID: 36136707 PMCID: PMC9501470 DOI: 10.3390/vetsci9090491] [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: 06/20/2022] [Revised: 08/04/2022] [Accepted: 09/05/2022] [Indexed: 11/25/2022] Open
Abstract
Chickens raised for their meat (Gallus gallus domesticus) tend to have a critical phase of life right after hatching due to the management of modern production systems. Early nutrition strategies such as in ovo intervention can be an alternative means to support growth and gut health by compensating for the energy deficit after pipping out of the egg. In the current study, 1200 Ross 308 eggs were used to examine the effects of a complex carbohydrate solution of disaccharides and glucose applied in ovo on hatchability, the hatching time of different-sized eggs, and the development, performance, and carcass characteristics of broilers of both sexes. The eggs were divided into three treatment groups: intact (NT), in ovo saline (ioS), and in ovo carbohydrate mixture (ioCH). The incubation protocol was performed according to the recommendations of Aviagen (2019), and the in ovo process was carried out on day 17 by manually injecting 0.5 mL of the solutions into the amniotic fluid. After hatching, the birds were kept in floor pens until day 35 and fed ad libitum in a three-phase feeding program. Body weight, average daily weight gain, feed intake and conversion, and carcass characteristics were measured during the trial. In ovo carbohydrates reduced hatchability by 15%, while growth performance and the weight of thigh and breast muscle were enhanced significantly (p < 0.05) compared with ioS as a possible outcome of carbohydrate-to-muscle satellite cell proliferation and protein accumulation. However, further study is needed to refine the in ovo carbohydrate supplementation method to minimize the mortality of embryos during hatching.
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Affiliation(s)
- Virág Ács
- MTA-MATE Mycotoxins in the Food Chain Research Group, 7400 Kaposvár, Hungary
- Department of Farm Animal Nutrition, Hungarian University of Agriculture and Life Sciences Kaposvár Campus, 7400 Kaposvár, Hungary
- Correspondence:
| | - Szilvia Áprily
- Department of Precision Farming and Animal Biotechnology, Hungarian University of Agriculture and Life Sciences Kaposvár Campus, 7400 Kaposvár, Hungary
| | | | - László Kacsala
- Department of Farm Animal Nutrition, Hungarian University of Agriculture and Life Sciences Kaposvár Campus, 7400 Kaposvár, Hungary
| | - János Tossenberger
- Department of Farm Animal Nutrition, Hungarian University of Agriculture and Life Sciences Kaposvár Campus, 7400 Kaposvár, Hungary
| | - Nóra Katalin Szeli
- Department of Farm Animal Nutrition, Hungarian University of Agriculture and Life Sciences Kaposvár Campus, 7400 Kaposvár, Hungary
| | - Veronika Halas
- Department of Farm Animal Nutrition, Hungarian University of Agriculture and Life Sciences Kaposvár Campus, 7400 Kaposvár, Hungary
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6
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Illés Á, Bojtor C, Széles A, Mousavi S, Tóth B, Nagy J. Effect of nitrogen fertiliser on the rate of lipid peroxidation of different maize hybrids in a long-term multifactorial experiment. AAlim 2021. [DOI: 10.1556/066.2020.00177] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
AbstractThe presented research aimed to confirm that the differences in the lipid peroxidation of three maize (Zea mays L.) hybrids with different genotypes and maturity are due to different nitrogen levels, which was observed based on the amount of malondialdehyde (MDA) measured in the leaves at the main phenological stages of plants. The experiments were performed in a multi-factorial long term fertilisation field trial. In the study, phosphorus and potassium were constantly provided at the optimal level for the plants. The phosphorus and potassium fertilisation were applied in autumn. However, N levels varied from 0 to 300 kg ha−1. Sampling was done at different growth stages 5 times during the growing season (4 leaves, 6 leaves, 8 leaves, 14 leaves, silking). The 300 kg ha−1 N (dose 3) resulted in a significant increase in lipid peroxidation (MDA level), but not a statistically significant difference between the control (dose 1) and the 120 kg ha−1 (dose 2) N doses. The H1 hybrid had the lowest level of lipid peroxidation at the first sampling date. High volume nitrogen fertilisation (dose 3: 300 kg ha−1) increased lipid peroxidation in the hybrids. Averaging the values obtained for the same hybrid at the different sampling times, the medium (dose 2) 120 kg ha−1 N treatment had no significant effect on the lipid peroxidation of the hybrids compared to the values of the control plants. Based on the lipid peroxidation response of the hybrids to N treatment, the exact N dose inflection point can be determined to make the fertiliser utilisation of plants more efficient. Based on our results, we found that inadequate, low (120 kg ha−1) or high (300 kg ha−1) nitrogen fertilisation could affect the MDA levels of plants, thereby affecting the functioning of the lipid peroxidation mechanism.
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Affiliation(s)
- Á. Illés
- 1Institute of Land Utilisation, Technology and Regional Development, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - Cs. Bojtor
- 1Institute of Land Utilisation, Technology and Regional Development, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - A. Széles
- 1Institute of Land Utilisation, Technology and Regional Development, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - S.M.N. Mousavi
- 1Institute of Land Utilisation, Technology and Regional Development, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - B. Tóth
- 2Institute of Nutrition, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Böszörményi út 138, H-4032 Debrecen, Hungary
| | - J. Nagy
- 1Institute of Land Utilisation, Technology and Regional Development, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
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7
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Ledneczki I, Tapolcsányi P, Gábor E, Visegrády A, Vass M, Éles J, Holm P, Horváth A, Pocsai A, Mahó S, Greiner I, Krámos B, Béni Z, Kóti J, Káncz AE, Thán M, Kolok S, Laszy J, Balázs O, Bugovits G, Nagy J, Vastag M, Szájli Á, Bozó É, Lévay G, Lendvai B, Némethy Z. Discovery of novel positive allosteric modulators of the α7 nicotinic acetylcholine receptor: Scaffold hopping approach. Eur J Med Chem 2021; 214:113189. [PMID: 33540354 DOI: 10.1016/j.ejmech.2021.113189] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 01/08/2021] [Accepted: 01/08/2021] [Indexed: 11/26/2022]
Abstract
The paper focuses on the scaffold hopping-based discovery and characterization of novel nicotinic alpha 7 receptor positive modulator (α7 nAChR PAM) ligands around the reference molecule (A-867744). First, substantial efforts were carried out to assess the importance of the various pharmacophoric elements on the in vitro potency (SAR evaluation) by chemical modifications. Subsequently, several new derivatives with versatile, heteroaromatic central cores were synthesized and characterized. A promising, pyrazole-containing new chemotype with good physicochemical and in vitro parameters was identified. Retrospective analysis based on homology modeling was also carried out. Besides its favorable in vitro characteristics, the most advanced derivative 69 also showed in vivo efficacy in a rodent model of cognition (scopolamine-induced amnesia in the mouse place recognition test) and acceptable pharmacokinetic properties. Based on the in vivo data, the resulting molecule with advanced drug-like characteristics has the possibility to improve cognitive performance in a biologically relevant dose range, further strengthening the view of the supportive role of α7 nACh receptors in the cognitive processes.
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Affiliation(s)
- István Ledneczki
- Department of Chemistry, Gedeon Richter Plc., Budapest, Hungary.
| | - Pál Tapolcsányi
- Department of Chemistry, Gedeon Richter Plc., Budapest, Hungary
| | - Eszter Gábor
- Department of Chemistry, Gedeon Richter Plc., Budapest, Hungary
| | - András Visegrády
- Department of Chemistry, Gedeon Richter Plc., Budapest, Hungary; Pharmacological and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - Márton Vass
- Department of Chemistry, Gedeon Richter Plc., Budapest, Hungary
| | - János Éles
- Department of Chemistry, Gedeon Richter Plc., Budapest, Hungary
| | | | - Anita Horváth
- Department of Chemistry, Gedeon Richter Plc., Budapest, Hungary
| | - Anikó Pocsai
- Department of Chemistry, Gedeon Richter Plc., Budapest, Hungary
| | - Sándor Mahó
- Department of Chemistry, Gedeon Richter Plc., Budapest, Hungary
| | - István Greiner
- Research Management, Gedeon Richter Plc., Budapest, Hungary
| | - Balázs Krámos
- Spectroscopic Research Department, Gedeon Richter Plc., Budapest, Hungary
| | - Zoltán Béni
- Spectroscopic Research Department, Gedeon Richter Plc., Budapest, Hungary
| | - János Kóti
- Spectroscopic Research Department, Gedeon Richter Plc., Budapest, Hungary
| | - Anna E Káncz
- Department of Chemistry, Gedeon Richter Plc., Budapest, Hungary
| | - Márta Thán
- Pharmacological and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - Sándor Kolok
- Pharmacological and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - Judit Laszy
- Pharmacological and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - Ottilia Balázs
- Pharmacological and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - Gyula Bugovits
- Pharmacological and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - József Nagy
- Pharmacological and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - Mónika Vastag
- Pharmacological and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - Ágota Szájli
- Department of Chemistry, Gedeon Richter Plc., Budapest, Hungary
| | - Éva Bozó
- Department of Chemistry, Gedeon Richter Plc., Budapest, Hungary
| | - György Lévay
- Pharmacological and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - Balázs Lendvai
- Pharmacological and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - Zsolt Némethy
- Pharmacological and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
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Alho EJL, Fonoff ET, Di Lorenzo Alho AT, Nagy J, Heinsen H. Use of computational fluid dynamics for 3D fiber tract visualization on human high-thickness histological slices: histological mesh tractography. Brain Struct Funct 2021; 226:323-333. [PMID: 33389040 DOI: 10.1007/s00429-020-02187-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 10/29/2019] [Accepted: 11/24/2020] [Indexed: 12/21/2022]
Abstract
Understanding the intricate three-dimensional relationship between fiber bundles and subcortical nuclei is not a simple task. It is of paramount importance in neurosciences, especially in the field of functional neurosurgery. The current methods for in vivo and post mortem fiber tract visualization have shortcomings and contributions to the field are welcome. Several tracts were chosen to implement a new technique to help visualization of white matter tracts, using high-thickness histology and dark field images. Our study describes the use of computational fluid dynamic simulations for visualization of 3D fiber tracts segmented from dark field microscopy in high-thickness histological slices (histological mesh tractography). A post mortem human brain was MRI scanned prior to skull extraction, histologically processed and serially cut at 430 µm thickness as previously described by our group. High-resolution dark field images were used to segment the outlines of the structures. These outlines served as basis for the construction of a 3D structured mesh, were a Finite Volume Method (FVM) simulation of water flow was performed to generate streamlines representing the geometry. The simulations were accomplished by an open source computer fluid dynamics software. The resulting simulation rendered a realistic 3D impression of the segmented anterior commissure, the left anterior limb of the internal capsule, the left uncinate fascicle, and the dentato-rubral tracts. The results are in line with clinical findings, diffusion MR imaging and anatomical dissection methods.
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Affiliation(s)
- Eduardo Joaquim Lopes Alho
- Morphological Brain Research Unit, Department of Psychiatry, University of Würzburg, Würzburg, Germany. .,Division of Functional Neurosurgery, Department of Neurology, University of São Paulo Medical School, Rua Dr. Ovidio Pires de Campos, 785, São Paulo, 01060-970, Brazil. .,Laboratory for Medical Investigations 44, Department of Radiology, São Paulo Medical School, São Paulo, Brazil.
| | - Erich T Fonoff
- Division of Functional Neurosurgery, Department of Neurology, University of São Paulo Medical School, Rua Dr. Ovidio Pires de Campos, 785, São Paulo, 01060-970, Brazil
| | - Ana Tereza Di Lorenzo Alho
- Laboratory for Medical Investigations 44, Department of Radiology, São Paulo Medical School, São Paulo, Brazil
| | | | - Helmut Heinsen
- Morphological Brain Research Unit, Department of Psychiatry, University of Würzburg, Würzburg, Germany.,Laboratory for Medical Investigations 44, Department of Radiology, São Paulo Medical School, São Paulo, Brazil
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Chrzanowski S, Tresansky AP, Nagy J, Rutkove S, Anthony B. MUSCLE IMAGING – MRI. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.167] [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: 12/01/2022]
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10
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Abstract
Chronic kidney diseases (CKDs) are the most common forms of kidney disease all around the world. The incidence of CKD is rising, which is mainly driven by population aging as well as by a global rise in hypertension, metabolic syndrome, and metabolic risk factors, particularly obesity and type-2 diabetes. The high mortality, morbidity of CKD, and the health care costs of the renal replacement therapy have led investigators to seek recent and potentially modifiable risk factors such as non-alcoholic fatty liver disease (NAFLD). NAFLD is the hepatic manifestation of metabolic syndrome and the most common cause of chronic liver disease. It incorporates a spectrum of liver diseases ranging from simple steatosis to steatohepatitis, liver cirrhosis, and hepatocellular carcinoma. On the basis of recent publications, the prevalence of CKD is significantly increased among patients with NAFLD, and the prevalence of NAFLD is also higher in CKD patients than in patients without NAFLD. These findings suggest that patients with NAFLD should be screened for CKD and patients with CKD and metabolic syndrome should be screened for NAFLD. Patients with NAFLD and CKD should be treated and followed up by a multidisciplinary team that involves specialists in hepatology, nephrology, diabetes, and cardiology.
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Affiliation(s)
- J Nagy
- 1 2nd Department of Internal Medicine, Nephrological and Diabetological Centre, Clinical Centre, Medical School, University of Pécs, Pécs, Hungary
| | - T Kovács
- 1 2nd Department of Internal Medicine, Nephrological and Diabetological Centre, Clinical Centre, Medical School, University of Pécs, Pécs, Hungary
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11
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Nagy J, Kovács T. A brief review on the rising incidence of chronic kidney diseases and non-alcoholic fatty liver disease. Physiol Int 2019; 106:305-310. [PMID: 31906711] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Chronic kidney diseases (CKDs) are the most common forms of kidney disease all around the world. The incidence of CKD is rising, which is mainly driven by population aging as well as by a global rise in hypertension, metabolic syndrome, and metabolic risk factors, particularly obesity and type-2 diabetes. The high mortality, morbidity of CKD, and the health care costs of the renal replacement therapy have led investigators to seek recent and potentially modifiable risk factors such as non-alcoholic fatty liver disease (NAFLD). NAFLD is the hepatic manifestation of metabolic syndrome and the most common cause of chronic liver disease. It incorporates a spectrum of liver diseases ranging from simple steatosis to steatohepatitis, liver cirrhosis, and hepatocellular carcinoma. On the basis of recent publications, the prevalence of CKD is significantly increased among patients with NAFLD, and the prevalence of NAFLD is also higher in CKD patients than in patients without NAFLD. These findings suggest that patients with NAFLD should be screened for CKD and patients with CKD and metabolic syndrome should be screened for NAFLD. Patients with NAFLD and CKD should be treated and followed up by a multidisciplinary team that involves specialists in hepatology, nephrology, diabetes, and cardiology.
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Affiliation(s)
- J Nagy
- 2nd Department of Internal Medicine, Nephrological and Diabetological Centre, Clinical Centre, Medical School, University of Pécs, Pécs, Hungary
| | - T Kovács
- 2 Department of Internal Medicine, Nephrological and Diabetological Centre, Clinical Centre, Medical School, University of Pécs, Pécs, Hungary
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12
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Alho EJL, Alho ATDL, Horn A, Martin MDGM, Edlow BL, Fischl B, Nagy J, Fonoff ET, Hamani C, Heinsen H. The Ansa Subthalamica: A Neglected Fiber Tract. Mov Disord 2019; 35:75-80. [PMID: 31758733 DOI: 10.1002/mds.27901] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 09/27/2019] [Accepted: 10/06/2019] [Indexed: 12/30/2022] Open
Affiliation(s)
- Eduardo Joaquim Lopes Alho
- Department of Neurology, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil.,Morphological Brain Research Unit, Department of Psychiatry, University of Würzburg, Würzburg, Germany.,Hospital Beneficência Portuguesa de São Paulo, São Paulo, Brazil
| | - Ana Tereza Di Lorenzo Alho
- Department of Radiology, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Andreas Horn
- Department of Neurology, Neuromodulation and Movement Disorders Unit, Charité-University Medicine (CCM), Berlin, Germany
| | - Maria da Graça M Martin
- Department of Radiology, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Brian L Edlow
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Boston, Massachussets, USA
| | - Bruce Fischl
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Boston, Massachussets, USA.,Department of Radiology, Mass. General Hospital, Boston, Massachusetts, USA.,EECS/HST MIT, Cambridge, Massachusetts, USA
| | | | - Erich T Fonoff
- Department of Neurology, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Clement Hamani
- Division of Neurosurgery Sunnybrook Health Sciences Center, Harquail Centre for Neuromodulation, Toronto, Ontario, Canada
| | - Helmut Heinsen
- Morphological Brain Research Unit, Department of Psychiatry, University of Würzburg, Würzburg, Germany.,Department of Radiology, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
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Horvath Z, Paszt A, Simonka Z, Latos M, Nagy J, Szirony D, Frittmann L, Kaizer L, Hamar S, Voros A, Ormandi K, Fejes Z, Lazar G. To do or not to do: axillary blockdissection after preoperative axillary ultrasound and aspiration cytology. Eur J Surg Oncol 2019. [DOI: 10.1016/j.ejso.2018.10.360] [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: 11/30/2022] Open
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15
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Farkas E, Oláh M, Földi A, Kóti J, Éles J, Nagy J, Gal CA, Paizs C, Hornyánszky G, Poppe L. Chemoenzymatic Dynamic Kinetic Resolution of Amines in Fully Continuous-Flow Mode. Org Lett 2018; 20:8052-8056. [DOI: 10.1021/acs.orglett.8b03676] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Emese Farkas
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Márk Oláh
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Attila Földi
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - János Kóti
- Gedeon Richter Plc., P.O. Box 27, H-1475 Budapest, Hungary
| | - János Éles
- Gedeon Richter Plc., P.O. Box 27, H-1475 Budapest, Hungary
| | - József Nagy
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Cristian Andrei Gal
- Biocatalysis and Biotransformation Research Centre, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University of Cluj-Napoca, Arany János str. 11, RO-400028 Cluj-Napoca, Romania
| | - Csaba Paizs
- Biocatalysis and Biotransformation Research Centre, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University of Cluj-Napoca, Arany János str. 11, RO-400028 Cluj-Napoca, Romania
| | - Gábor Hornyánszky
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
- SynBiocat LLC., Szilasliget u. 3, H-1172 Budapest, Hungary
| | - László Poppe
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
- Biocatalysis and Biotransformation Research Centre, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University of Cluj-Napoca, Arany János str. 11, RO-400028 Cluj-Napoca, Romania
- SynBiocat LLC., Szilasliget u. 3, H-1172 Budapest, Hungary
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16
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Komjáti B, Szokol B, Kováts B, Kegye P, Nagy J. DFT Study of Stereoselective Ketene-imine Cycloadditions, Evaluation of Possible Solvent Effects with IEF-PCM. Period Polytech Chem Eng 2018. [DOI: 10.3311/ppch.12527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
The formal [2+2] cycloaddition of ketenes and imines, also known as Staudinger synthesis, is a facile method for the synthesis of biologically important β-lactam derivatives. In this paper two previously reported stereoselective reactions were investigated with computational methods. Our computations support experimental data that a chiral imine, derived from d-glyceraldehyde reacting with ketenes, yields almost exclusively one out of the possible four diastereomers. The reaction proceeds stepwise, first addition of the imine to the ketene yields an intermediate, then the product is formed in a conrotatory electrocyclization. Results indicate that the electrostatic repulsion of the chiral auxiliary group is the main factor of the stereoselectivity, but solvent and substituent effects are not negligible. Calculations were performed at M06-2X/6-31+G** level of theory combined with IEF-PCM solvation, in common solvents such as toluene, THF, dichloromethane, acetonitrile and water. These results provide useful insight for the development of new chiral auxiliaries and optimizing reaction parameters.
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17
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Sági B, Késői I, Késői B, Vas T, Csiky B, Kovács T, Nagy J. Arterial stiffness may predict renal and cardiovascular prognosis in autosomal-dominant polycystic kidney disease. Physiol Int 2018; 105:145-156. [DOI: 10.1556/2060.105.2018.2.17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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
Background and aims
Autosomal-dominant polycystic kidney disease (ADPKD) is one of the most common causes of end-stage renal disease (ESRD). The most important cause of death among ADPKD patients is cardiovascular (CV). The aim of this study was to examine the prognostic significance of arterial stiffness on CV and renal outcomes in ADPKD.
Methods
A total of 55 patients with ADPKD were examined. Pulse wave velocity was determined and stiffness index (SIDVP) was calculated. Combined primary endpoints (CV and renal) were major CV events (myocardial infarction, stroke, and CV intervention) as CV endpoints, and attaining of ESRD or start of renal replacement therapy as renal endpoints. Secondary endpoints were CV or renal endpoints separately.
Results
The mean age of those 55 ADPKD patients was 45 ± 12 years, 21 patients were male. The average value of the SIDVP was 11.11 ± 2.22 m/s. The patients were divided into two groups by the cutoff value of 11 m/s of SIDVP and then outcomes were analyzed. In the higher arterial stiffness group (SIDVP > 11 m/s), occurrence of combined primary endpoint (CV and renal) was significantly higher than in the group with more elastic arteries (p = 0.033). A statistically significant difference was found in the renal endpoints (p = 0.018), but not in the CV endpoints (p = 0.952) between the two groups.
Conclusions
Increased arterial stiffness predicts the onset of ESRD in ADPDK. Assessment of SIDVP appears to be a useful method for estimating the renal and CV prognosis in ADPKD.
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Affiliation(s)
- B Sági
- 1 2nd Department of Internal Medicine and Nephrological Centre, Clinical Centre, Medical School, University of Pécs, Pécs, Hungary
| | - I Késői
- 2 Internal Medicine Department, Mining Rehabilitation and Night Time Sanatorium, Health Centre of Komló, Komló, Hungary
| | - B Késői
- 3 Department of Adult Cardiology, György Gottsegen National Institute of Cardiology, Budapest, Hungary
| | - T Vas
- 1 2nd Department of Internal Medicine and Nephrological Centre, Clinical Centre, Medical School, University of Pécs, Pécs, Hungary
| | - B Csiky
- 1 2nd Department of Internal Medicine and Nephrological Centre, Clinical Centre, Medical School, University of Pécs, Pécs, Hungary
| | - T Kovács
- 1 2nd Department of Internal Medicine and Nephrological Centre, Clinical Centre, Medical School, University of Pécs, Pécs, Hungary
| | - J Nagy
- 1 2nd Department of Internal Medicine and Nephrological Centre, Clinical Centre, Medical School, University of Pécs, Pécs, Hungary
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18
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Sági B, Késoi I, Vas T, Csiky B, Kovács T, Nagy J. THE PROGNOSTIC ROLE OF HEART RATE RECOVERY AFTER EXERCISE IN IGA NEPHROPATHY. J Hypertens 2018. [DOI: 10.1097/01.hjh.0000539517.12352.80] [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: 11/25/2022]
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19
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Kókai E, Kováts B, Komjáti B, Volk B, Nagy J. Experimental and Computational Study on the Debenzylation of (2,4-dimethoxybenzyl)-protected 1,3-diazaoxindoles. Period Polytech Chem Eng 2017. [DOI: 10.3311/ppch.11306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
The introduction and removal of the 2,4-dimethoxybenzyl (DMB) moiety was studied in order to use it as a protecting group in the synthesis of diverse drug candidates containing the 1,3-diazaoxindole scaffold. The debenzylation of C(5)-unsubstituted and C(5)-isopropylidene-substituted 1,3-diazaoxindoles was investigated under various conditions. The DMB group could only be removed from the latter derivative using triflic acid. This observation can most likely be explained with electronic effects. In order to get a deeper insight into the reaction mechanism, quantum chemical calculations have been performed.
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20
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Nagy J, Kobolák J, Berzsenyi S, Ábrahám Z, Avci HX, Bock I, Bekes Z, Hodoscsek B, Chandrasekaran A, Téglási A, Dezső P, Koványi B, Vörös ET, Fodor L, Szél T, Németh K, Balázs A, Dinnyés A, Lendvai B, Lévay G, Román V. Altered neurite morphology and cholinergic function of induced pluripotent stem cell-derived neurons from a patient with Kleefstra syndrome and autism. Transl Psychiatry 2017; 7:e1179. [PMID: 28742076 PMCID: PMC5538124 DOI: 10.1038/tp.2017.144] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 04/28/2017] [Indexed: 01/05/2023] Open
Abstract
The aim of the present study was to establish an in vitro Kleefstra syndrome (KS) disease model using the human induced pluripotent stem cell (hiPSC) technology. Previously, an autism spectrum disorder (ASD) patient with Kleefstra syndrome (KS-ASD) carrying a deleterious premature termination codon mutation in the EHMT1 gene was identified. Patient specific hiPSCs generated from peripheral blood mononuclear cells of the KS-ASD patient were differentiated into post-mitotic cortical neurons. Lower levels of EHMT1 mRNA as well as protein expression were confirmed in these cells. Morphological analysis on neuronal cells differentiated from the KS-ASD patient-derived hiPSC clones showed significantly shorter neurites and reduced arborization compared to cells generated from healthy controls. Moreover, density of dendritic protrusions of neuronal cells derived from KS-ASD hiPSCs was lower than that of control cells. Synaptic connections and spontaneous neuronal activity measured by live cell calcium imaging could be detected after 5 weeks of differentiation, when KS-ASD cells exhibited higher sensitivity of calcium responses to acetylcholine stimulation indicating a lower nicotinic cholinergic tone at baseline condition in KS-ASD cells. In addition, gene expression profiling of differentiated neuronal cells from the KS-ASD patient revealed higher expression of proliferation-related genes and lower mRNA levels of genes involved in neuronal maturation and migration. Our data demonstrate anomalous neuronal morphology, functional activity and gene expression in KS-ASD patient-specific hiPSC-derived neuronal cultures, which offers an in vitro system that contributes to a better understanding of KS and potentially other neurodevelopmental disorders including ASD.
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Affiliation(s)
- J Nagy
- Pharmacology and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary,Laboratory of Molecular Cell Biology, Gedeon Richter Plc. Gyömrői út 19-21., Budapest 1103, Hungary. E-mail:
| | | | - S Berzsenyi
- Pharmacology and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - Z Ábrahám
- Pharmacology and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - H X Avci
- BioTalentum Ltd., Gödöllő, Hungary
| | - I Bock
- BioTalentum Ltd., Gödöllő, Hungary
| | - Z Bekes
- Pharmacology and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - B Hodoscsek
- Pharmacology and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | | | | | - P Dezső
- Pharmacology and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - B Koványi
- Pharmacology and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - E T Vörös
- Pharmacology and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - L Fodor
- Pharmacology and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - T Szél
- Pharmacology and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - K Németh
- Autism Foundation, Budapest, Hungary
| | - A Balázs
- Autism Foundation, Budapest, Hungary
| | | | - B Lendvai
- Pharmacology and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - G Lévay
- Pharmacology and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - V Román
- Pharmacology and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
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21
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Németh T, Dargó G, Petró JL, Petrik Z, Lévai S, Krámos B, Béni Z, Nagy J, Balogh GT, Huszthy P, Tóth T. Synthesis and pK a determination of new enantiopure dimethyl-substituted acridino-crown ethers containing a carboxyl group: Useful candidates for enantiomeric recognition studies. Chirality 2017. [PMID: 28649773 DOI: 10.1002/chir.22721] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
New enantiopure dimethyl-substituted acridino-18-crown-6 and acridino-21-crown-7 ethers containing a carboxyl group at position 9 of the acridine ring [(S,S)-8, (S,S)-9, (R,R)-10] were synthesized. The pKa values of the new crown ethers [(S,S)-8, (S,S)-9, (R,R)-10] and of an earlier reported macrocycle [(R,R)-2] were determined by UV-pH titrations. Crown ether (S,S)-8 was attached to silica gel by covalent bonds and the enantiomeric separation ability of the newly prepared chiral stationary phase [(S,S)-CSP-12] was studied by high-performance liquid chromatography (HPLC). Homochiral preference was observed and the best separation was achieved for the enantiomers of 1-NEA. Ligands (S,S)-9 and (R,R)-10 are precursors of enantioselective sensor and selector molecules for the enantiomers of protonated primary amines, amino acids, and their derivatives.
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Affiliation(s)
- Tamás Németh
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Gergő Dargó
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary.,Compound Profiling Laboratory, Chemical Works of Gedeon Richter Plc, Budapest, Hungary
| | - József Levente Petró
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Zsófia Petrik
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary.,Compound Profiling Laboratory, Chemical Works of Gedeon Richter Plc, Budapest, Hungary
| | - Sándor Lévai
- Compound Profiling Laboratory, Chemical Works of Gedeon Richter Plc, Budapest, Hungary
| | - Balázs Krámos
- Spectroscopic Research, Chemical Works of Gedeon Richter Plc, Budapest, Hungary
| | - Zoltán Béni
- Spectroscopic Research, Chemical Works of Gedeon Richter Plc, Budapest, Hungary
| | - József Nagy
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - György Tibor Balogh
- Compound Profiling Laboratory, Chemical Works of Gedeon Richter Plc, Budapest, Hungary
| | - Péter Huszthy
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Tünde Tóth
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
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Kókai E, Halász J, Dancsó A, Nagy J, Simig G, Volk B. Study on the Alkylation Reactions of N(7)-Unsubstituted 1,3-Diazaoxindoles. Molecules 2017; 22:molecules22050846. [PMID: 28534864 PMCID: PMC6154441 DOI: 10.3390/molecules22050846] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Revised: 05/13/2017] [Accepted: 05/16/2017] [Indexed: 11/30/2022] Open
Abstract
The chemistry of the 5,7-dihydro-6H-pyrrolo[2,3-d]pyrimidin-6-one (1,3-diazaoxindole) compound family, possessing a drug-like scaffold, is unexplored. In this study, the alkylation reactions of N(7)-unsubstituted 5-isopropyl-1,3-diazaoxindoles bearing various substituents at the C(2) position have been investigated. The starting compounds were synthesized from the C(5)-unsubstituted parent compounds by condensation with acetone and subsequent catalytic reduction of the 5-isopropylidene moiety. Alkylation of the thus obtained 5-isopropyl derivatives with methyl iodide or benzyl bromide in the presence of a large excess of sodium hydroxide led to 5,7-disubstituted derivatives. Use of butyllithium as the base rendered alkylation in the C(5) position possible with reasonable selectivity, without affecting the N(7) atom. During the study on the alkylation reactions, some interesting by-products were also isolated and characterized.
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Affiliation(s)
- Eszter Kókai
- Directorate of Drug Substance Development, Egis Pharmaceuticals Plc., P.O. Box 100, 1475 Budapest, Hungary.
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, P.O. Box 91, 1521 Budapest, Hungary.
- Department of Materials Technology, GAMF Faculty of Engineering and Computer Science, Pallasz Athéné University, P.O. Box 700, 6001 Kecskemét, Hungary.
| | - Judit Halász
- Directorate of Drug Substance Development, Egis Pharmaceuticals Plc., P.O. Box 100, 1475 Budapest, Hungary.
| | - András Dancsó
- Directorate of Drug Substance Development, Egis Pharmaceuticals Plc., P.O. Box 100, 1475 Budapest, Hungary.
| | - József Nagy
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, P.O. Box 91, 1521 Budapest, Hungary.
| | - Gyula Simig
- Directorate of Drug Substance Development, Egis Pharmaceuticals Plc., P.O. Box 100, 1475 Budapest, Hungary.
| | - Balázs Volk
- Directorate of Drug Substance Development, Egis Pharmaceuticals Plc., P.O. Box 100, 1475 Budapest, Hungary.
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23
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Hodgskiss L, Nagy J, Barnhart E, Cunningham A, Fields M. Cultivation of a native alga for biomass and biofuel accumulation in coal bed methane production water. ALGAL RES 2016. [DOI: 10.1016/j.algal.2016.07.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
Background— Kidney transplantation is generally acknowledged as the more clinically effective and more cost-effective option in managing patients with end-stage renal disease, compared with dialysis. This study looked for confirmatory evidence in a Hungarian population. Methods— Patients (n = 242) with end-stage renal disease who received cadaveric kidney transplantation during 1994 were followed up for 3 years. They were compared with patients (n = 840) receiving hemodialysis who were on a waiting list for transplantation. Data were collected retrospectively. Treatments were compared for clinical efficacy and for cost-effectiveness. Results— At month 36, the standard mortality hazard function was 3.5 times higher in the group receiving hemodialysis ( P<.0001) than in the transplant recipients. Average treatment costs per patient over the 3 years were also significantly higher ( P<.0001) in the hemodialysis group than in the group that received transplants. The cost of 1 year gained by transplantation was significantly less ( P<.0001) than the cost associated with hemodialysis. Conclusions— Compared with hemodialysis, kidney transplantation provides greater survival benefits to patients with end-stage renal disease, at less cost.
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Affiliation(s)
- Z Kaló
- Novartis Hungary Ltd, Budapest, Hungary
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Sonkodi I, Nagy J, Novak P, Braunitzer G, Virag K, Boda K, Nagy K. A retrospective screening and epidemiological study of oncological and other diseases in the oral and maxillofacial region at the University of Szeged, Department of Oral Medicine (1960-2014). Fogorv Sz 2016; 109:94-101. [PMID: 29693955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The Department of Oral Medicine at the University of Szeged was responsible for the stomato-oncological care of the population of three counties (with a population of 1,7 M at an average) in the period 1960-201 4. The present report summarizes the incidence of oral medicine diseases during this period. The overall number of new out-patients at the Department of Oral Surgery between 1960 and 2014 was 338,200. These patients were dental and oral surgical patients who presented spontaneously or were referred from the general practice, or stomato-oncological patients referred from general dental practices in-the three counties. Of the 338,200 new cases, 9,482 (2.8%) were benign tumors, 5438 (1.6%) premalignancies and 5,145 (1.5%) malignant tumors. This means a total of 20,065 tumor cases (5.9%) in the examined period, of which 10,579 (3.1 %) were premalignancies and malignancies. 14,446 patients presented with other diseases of the oral mucous membrane (5.8%, data available from 1974). Data on the number of stomato-oncological control patients in any given year are available from 1970 on. In the period 1970-2014, the total number of check-up patients was 117,268, this is the 76,97% of the departments overall number of patients. As for the tendencies, in the representative period of 1960-2004, the number of new benign tumors 15-fold, premalignancies 30-fold, and malignant tumors exhibited an 25-fold increase, while the number of other conditions affecting the oral mucosa showed a 14-fold increase.
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Szabó ZI, Szőcs L, Horváth P, Komjáti B, Nagy J, Jánoska Á, Muntean DL, Noszál B, Tóth G. Liquid chromatography with mass spectrometry enantioseparation of pomalidomide on cyclodextrin-bonded chiral stationary phases and the elucidation of the chiral recognition mechanisms by NMR spectroscopy and molecular modeling. J Sep Sci 2016; 39:2941-9. [PMID: 27279456 DOI: 10.1002/jssc.201600354] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [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: 03/28/2016] [Revised: 05/30/2016] [Accepted: 05/30/2016] [Indexed: 01/04/2023]
Abstract
A sensitive and validated liquid chromatography with mass spectrometry method was developed for the enantioseparation of the racemic mixture of pomalidomide, a novel, second-generation immunomodulatory drug, using β-cyclodextrin-bonded stationary phases. Four cyclodextrin columns (β-, hydroxypropyl-β-, carboxymethyl-β-, and sulfobutyl-β-cyclodextrin) were screened and the effects of eluent composition, flow rate, temperature, and organic modifier on enantioseparation were studied. Optimized parameters, offering baseline separation (resolution = 2.70 ± 0.02) were the following: β-cyclodextrin stationary phase, thermostatted at 15°C, and mobile phase consisting of methanol/0.1% acetic acid 10:90 v/v, delivered with 0.8 mL/min flow rate. For the optimized parameter at multiple reaction monitoring mode 274.1-201.0 transition with 20 eV collision energy and 100 V fragmentor voltage the limit of detection and limit of quantitation were 0.75 and 2.00 ng/mL, respectively. Since enantiopure standards were not available, elution order was determined upon comparison of the circular dichroism signals of the separated pomalidomide enantiomers with that of enantiopure thalidomide. The mechanisms underlying the chiral discrimination between the enantiomers were also investigated. Pomalidomide-β-cyclodextrin inclusion complex was characterized using nuclear magnetic resonance spectroscopy and molecular modeling. The thermodynamic aspects of chiral separation were also studied.
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Affiliation(s)
- Zoltán-István Szabó
- Faculty of Pharmacy, University of Medicine and Pharmacy of Tîrgu Mureș, Romania
| | - Levente Szőcs
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Semmelweis University, Budapest, Hungary
| | - Péter Horváth
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Semmelweis University, Budapest, Hungary
| | - Balázs Komjáti
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - József Nagy
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Ádám Jánoska
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Semmelweis University, Budapest, Hungary
| | | | - 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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Falus P, Cerioli L, Bajnóczi G, Boros Z, Weiser D, Nagy J, Tessaro D, Servi S, Poppe L. A Continuous-Flow Cascade Reactor System for Subtilisin A- Catalyzed Dynamic Kinetic Resolution ofN-tert-Butyloxycarbonylphenylalanine Ethyl Thioester with Benzylamine. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201500902] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [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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Komjáti B, Urai Á, Hosztafi S, Kökösi J, Kováts B, Nagy J, Horváth P. Systematic study on the TD-DFT calculated electronic circular dichroism spectra of chiral aromatic nitro compounds: A comparison of B3LYP and CAM-B3LYP. Spectrochim Acta A Mol Biomol Spectrosc 2016; 155:95-102. [PMID: 26583523 DOI: 10.1016/j.saa.2015.11.002] [Citation(s) in RCA: 17] [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] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 10/05/2015] [Accepted: 11/01/2015] [Indexed: 06/05/2023]
Abstract
B3LYP is one of the most widely used functional for the prediction of electronic circular dichroism spectra, however if the studied molecule contains aromatic nitro group computations may fail to produce reliable results. A test set of molecules of known stereochemistry were synthesized to study this phenomenon in detail. Spectra were computed by B3LYP and CAM-B3LYP functionals with 6-311++G(2d,2p) basis set. It was found that the range separated CAM-B3LYP gives better predictions than B3LYP for all test molecules. Fragment population analysis revealed that the nitro groups form highly localized molecule orbitals but the exact composition depends on the functional. CAM-B3LYP allows sufficient spatial overlap between the nitro group and distant parts of the molecule, which is necessary for the accurate description of excited states especially for charge transfer states. This phenomenon and the synthesized test molecules can be used to benchmark theoretical methods as well as to help the development of new functionals intended for spectroscopical studies.
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Affiliation(s)
- Balázs Komjáti
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Szent Gellért tér 4, Budapest 1111, Hungary.
| | - Ákos Urai
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre utca 7, Budapest 1092, Hungary
| | - Sándor Hosztafi
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre utca 7, Budapest 1092, Hungary
| | - József Kökösi
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre utca 7, Budapest 1092, Hungary
| | - Benjámin Kováts
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Szent Gellért tér 4, Budapest 1111, Hungary
| | - József Nagy
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Szent Gellért tér 4, Budapest 1111, Hungary
| | - Péter Horváth
- Department of Pharmaceutical Chemistry, Semmelweis University, Hőgyes Endre utca 7, Budapest 1092, Hungary
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Kókai E, Nagy J, Tóth T, Kupai J, Huszthy P, Simig G, Volk B. Convenient synthesis of 2-substituted 5,7-dihydro-6H-pyrrolo[2,3-d]pyrimidin-6-ones. Monatsh Chem 2016. [DOI: 10.1007/s00706-015-1634-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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30
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Bencze LC, Komjáti B, Pop LA, Paizs C, Irimie FD, Nagy J, Poppe L, Toşa MI. Synthesis of enantiopure l-(5-phenylfuran-2-yl)alanines by a sequential multienzyme process. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.08.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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31
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Csontos P, Angyal Z, Chmura D, Nagy J, Halbritter A, Tamás J. New Stand of Invasive NeophyteAmbrosia artemisiifoliaL. and Its Potential Reproduction. Polish Journal of Ecology 2015. [DOI: 10.3161/15052249pje2015.63.3.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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32
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Sanchez E, Fernández-Martín JL, Floege J, Ketteler M, London G, Locatelli F, Gorriz JL, Rutkowski B, Memmos D, Covic A, Nagy J, Goldsmith D, Benedik M, Cannata-Andía JB. FP473THE USE OF HIGH-FLUX MEMBRANES IS NOT ASSOCIATED WITH IMPROVED SURVIVAL OF PATIENTS ON HEMODIALYSIS. Nephrol Dial Transplant 2015. [DOI: 10.1093/ndt/gfv179.02] [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: 11/14/2022] Open
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33
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T�ri S, Nagy J, Haszon I, Havass Z, N�meth M, Bereczki C. Disturbances of Lipoprotein and PGI2 Metabolism in IgA Nephropathy and Henoch-Sch�nlein Purpura. Contributions to Nephrology 2015. [DOI: 10.1159/000415371] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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34
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Affiliation(s)
- J Nagy
- Second Department of Medicine, University Medical School, Pécs, Hungary
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35
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Davin JC, Nagy J, Lombet J, Foidart JB, Dechenne C, Mahieu PR. Experimental glomerulonephritis induced by the glomerular deposition of IgA-concanavalin A complexes. Contrib Nephrol 2015; 67:111-6. [PMID: 3061734 DOI: 10.1159/000415385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- J C Davin
- Department of Pediatrics, State University of Liège, Belgium
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36
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Komjáti B, Szokol B, Poppe L, Nagy J. Copper(II) Fluoride a New Efficient Promoter of Chan-Lam-Evans Coupling. Period Polytech Chem Eng 2015. [DOI: 10.3311/ppch.7835] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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37
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Boros Z, Hornyánszky G, Nagy J, Poppe L. From Synthetic Chemistry and Stereoselective Biotransformations to Enzyme Biochemistry – The Bioorganic Chemistry Group at the Budapest University of Technology and Economics. Period Polytech Chem Eng 2015. [DOI: 10.3311/ppch.7390] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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38
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Abstract
Single-molecule studies can be used to study biological processes directly and in real-time. In particular, the fluorescence energy transfer between reporter dye molecules attached to specific sites on macromolecular complexes can be used to infer distance information. When several measurements are combined, the information can be used to determine the position and conformation of certain domains with respect to the complex. However, data analysis schemes that include all experimental uncertainties are highly complex, and the outcome depends on assumptions about the state of the dye molecules. Here, we present a new analysis algorithm using Bayesian parameter estimation based on Markov Chain Monte Carlo sampling and parallel tempering termed Fast-NPS that can analyse large smFRET networks in a relatively short time and yields the position of the dye molecules together with their respective uncertainties. Moreover, we show what effects different assumptions about the dye molecules have on the outcome. We discuss the possibilities and pitfalls in structure determination based on smFRET using experimental data for an archaeal transcription pre-initiation complex, whose architecture has recently been unravelled by smFRET measurements.
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Affiliation(s)
- M. Beckers
- Biophysics Institute
- Ulm University
- 89081 Ulm
- Germany
| | - F. Drechsler
- Biophysics Institute
- Ulm University
- 89081 Ulm
- Germany
| | - T. Eilert
- Biophysics Institute
- Ulm University
- 89081 Ulm
- Germany
| | - J. Nagy
- Biophysics Institute
- Ulm University
- 89081 Ulm
- Germany
| | - J. Michaelis
- Biophysics Institute
- Ulm University
- 89081 Ulm
- Germany
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39
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Szunomár S, Nagy J, Pakai A, Fullér N, Stromájer-Rácz T, Boncz I, Oláh A. Stress Load Factors in the Scope of Students. Value Health 2014; 17:A512. [PMID: 27201579 DOI: 10.1016/j.jval.2014.08.1576] [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)
| | - J Nagy
- University of Pécs, Pécs, Hungary
| | - A Pakai
- University of Pécs, Zalaegerszeg, Hungary
| | - N Fullér
- University of Pécs, Pécs, Hungary
| | | | - I Boncz
- Faculty of Health Sciences, University of Pécs, Pécs, Hungary
| | - A Oláh
- University of Pécs, Pécs, Hungary
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40
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Rencz F, Kovács Á, Gulacsi L, Majoros A, Nyirády P, Tenke P, Németh Z, Nagy GJ, Nagy J, Buzogány I, Böszörményi-Nagy G, Brodszky V. Health-Related Quality Of Life And Subjective Happiness Of Patients With Benign Prostatic Hyperplasia: First Results Of A Cross-Sectional Survey From Hungary. Value Health 2014; 17:A471-A472. [PMID: 27201353 DOI: 10.1016/j.jval.2014.08.1339] [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)
- F Rencz
- Corvinus University of Budapest, Budapest, Hungary
| | - Á Kovács
- Corvinus University of Budapest, Budapest, Hungary
| | - L Gulacsi
- Corvinus University of Budapest, Budapest, Hungary
| | - A Majoros
- Semmelweis University, Budapest, Hungary
| | - P Nyirády
- Semmelweis University, Budapest, Hungary
| | - P Tenke
- Jahn Ferenc South-Pest Hospital and Clinic, Budapest, Hungary
| | - Z Németh
- Jahn Ferenc South-Pest Hospital and Clinic, Budapest, Hungary
| | - G J Nagy
- Saint Borbala Hospital of Tatabánya, Tatabánya, Hungary
| | - J Nagy
- Szentgotthárd Clinic, Szentgotthárd, Hungary
| | - I Buzogány
- Péterfy Sándor Hospital, Budapest, Hungary
| | | | - V Brodszky
- Corvinus University of Budapest, Budapest, Hungary
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41
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Falus P, Boros Z, Kovács P, Poppe L, Nagy J. Lipase-Catalyzed Kinetic Resolution of 1-(2-Hydroxycyclohexyl)Indoles in Batch and Continuous-Flow Systems. J Flow Chem 2014. [DOI: 10.1556/jfc-d-14-00011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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42
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Kelemen Z, Péter-Szabó B, Székely E, Hollóczki O, Firaha DS, Kirchner B, Nagy J, Nyulászi L. An abnormal N-heterocyclic carbene-carbon dioxide adduct from imidazolium acetate ionic liquids: the importance of basicity. Chemistry 2014; 20:13002-8. [PMID: 25137312 DOI: 10.1002/chem.201402912] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [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: 04/02/2014] [Indexed: 11/08/2022]
Abstract
In the reaction of 1-ethyl-3-methylimidazolium acetate [C2C1Im][OAc] ionic liquid with carbon dioxide at 125 °C and 10 MPa, not only the known N-heterocyclic carbene (NHC)-CO2 adduct I, but also isomeric aNHC-CO2 adducts II and III were obtained. The abnormal NHC-CO2 adducts are stabilized by the presence of the polarizing basic acetate anion, according to static DFT calculations and ab initio molecular dynamics studies. A further possible reaction pathway is facilitated by the high basicity of the system, deprotonating the initially formed NHC-CO2 adduct I, which can then be converted in the presence of the excess of CO2 to the more stable 2-deprotonated anionic abnormal NHC-CO2 adduct via the anionic imidazolium-2,4-dicarboxylate according to DFT calculations on model compounds. This suggests a generalizable pathway to abnormal NHC complex formation.
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Affiliation(s)
- Zsolt Kelemen
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szt. Gellért tér 4. Budapest, 1111 (Hungary)
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Bovens M, Csesztregi T, Franc A, Nagy J, Dujourdy L. Erratum to ‘sampling of illicit drugs for quantitative analysis – Part II. Study of particle size and its influence on mass reduction’ (Forensic Science International 234C (2014) 174–180). Forensic Sci Int 2014. [DOI: 10.1016/j.forsciint.2014.05.024] [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: 11/25/2022]
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45
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Kurko D, Kapui Z, Nagy J, Lendvai B, Kolok S. Analysis of functional selectivity through G protein-dependent and -independent signaling pathways at the adrenergic α(2C) receptor. Brain Res Bull 2014; 107:89-101. [PMID: 25080296 DOI: 10.1016/j.brainresbull.2014.07.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 07/15/2014] [Accepted: 07/17/2014] [Indexed: 01/01/2023]
Abstract
Although G protein-coupled receptors (GPCRs) are traditionally categorized as Gs-, Gq-, or Gi/o-coupled, their signaling is regulated by multiple mechanisms. GPCRs can couple to several effector pathways, having the capacity to interact not only with more than one G protein subtype but also with alternative signaling or effector proteins such as arrestins. Moreover, GPCR ligands can have different efficacies for activating these signaling pathways, a characteristic referred to as biased agonism or functional selectivity. In this work our aim was to detect differences in the ability of various agonists acting at the α2C type of adrenergic receptors (α2C-ARs) to modulate cAMP accumulation, cytoplasmic Ca(2+) release, β-arrestin recruitment and receptor internalization. A detailed comparative pharmacological characterization of G protein-dependent and -independent signaling pathways was carried out using adrenergic agonists (norepinephrine, phenylephrine, brimonidine, BHT-920, oxymetazoline, clonidine, moxonidine, guanabenz) and antagonists (MK912, yohimbine). As initial analysis of agonist Emax and EC50 values suggested possible functional selectivity, ligand bias was quantified by applying the relative activity scale and was compared to that of the endogenous agonist norepinephrine. Values significantly different from 0 between pathways indicated an agonist that promoted different level of activation of diverse effector pathways most likely due to the stabilization of a subtly different receptor conformation from that induced by norepinephrine. Our results showed that a series of agonists acting at the α2C-AR displayed different degree of functional selectivity (bias factors ranging from 1.6 to 36.7) through four signaling pathways. As signaling via these pathways seems to have distinct functional and physiological outcomes, studying all these stages of receptor activation could have further implications for the development of more selective therapeutics with improved efficacy and/or fewer side effects.
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Affiliation(s)
- Dalma Kurko
- Pharmacological and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary.
| | - Zoltán Kapui
- Pharmacological and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - József Nagy
- Pharmacological and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - Balázs Lendvai
- Pharmacological and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
| | - Sándor Kolok
- Pharmacological and Drug Safety Research, Gedeon Richter Plc., Budapest, Hungary
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Csesztregi T, Bovens M, Dujourdy L, Franc A, Nagy J. Sampling of illicit drugs for quantitative analysis--part III: sampling plans and sample preparations. Forensic Sci Int 2014; 241:212-9. [PMID: 24815616 DOI: 10.1016/j.forsciint.2014.04.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 01/13/2014] [Revised: 04/08/2014] [Accepted: 04/13/2014] [Indexed: 11/19/2022]
Abstract
The findings in this paper are based on the results of our drug homogeneity studies and particle size investigations. Using that information, a general sampling plan (depicted in the form of a flow-chart) was devised that could be applied to the quantitative instrumental analysis of the most common illicit drugs: namely heroin, cocaine, amphetamine, cannabis resin, MDMA tablets and herbal cannabis in 'bud' form (type I). Other more heterogeneous forms of cannabis (type II) were found to require alternative, more traditional sampling methods. A table was constructed which shows the sampling uncertainty expected when a particular number of random increments are taken and combined to form a single primary sample. It also includes a recommended increment size; which is 1 g for powdered drugs and cannabis resin, 1 tablet for MDMA and 1 bud for herbal cannabis in bud form (type I). By referring to that table, individual laboratories can ensure that the sampling uncertainty for a particular drug seizure can be minimised, such that it lies in the same region as their analytical uncertainty for that drug. The table shows that assuming a laboratory wishes to quantitatively analyse a seizure of powdered drug or cannabis resin with a 'typical' heterogeneity, a primary sample of 15×1 g increments is generally appropriate. The appropriate primary sample for MDMA tablets is 20 tablets, while for herbal cannabis (in bud form) 50 buds were found to be appropriate. Our study also showed that, for a suitably homogenised primary sample of the most common powdered drugs, an analytical sample size of between 20 and 35 mg was appropriate and for herbal cannabis the appropriate amount was 200 mg. The need to ensure that the results from duplicate or multiple incremental sampling were compared, to demonstrate whether or not a particular seized material has a 'typical' heterogeneity and that the sampling procedure applied has resulted in a 'correct sample', was highlighted and the setting up of suitable control charts (R or S charts), for quality control purposes, was strongly recommended and examples given. Furthermore, although this particular study relates to the sampling of illicit drugs, it should be remembered that it is based on general sampling theory and therefore the same approach could be applied to other disciplines where 'correct sampling' of powders and solids is important.
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Affiliation(s)
- T Csesztregi
- Hungarian Institute for Forensic Sciences, P.O. Box 314/4, 1903 Budapest, Hungary.
| | - M Bovens
- Forensic Science Institute Zurich, P.O. Box, 8021 Zurich, Switzerland
| | - L Dujourdy
- Institut National de Police Scientifique, Service Central des Laboratoires, 31 Avenue Franklin Roosevelt, 69134 Ecully Cedex, France
| | - A Franc
- Forensic Equity, 39 Chatsworth Ave, Wokingham, Berkshire, RG41 5EU, United Kingdom
| | - J Nagy
- Hungarian Institute for Forensic Sciences, P.O. Box 314/4, 1903 Budapest, Hungary
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Bovens M, Csesztregi T, Franc A, Nagy J, Dujourdy L. Sampling of illicit drugs for quantitative analysis—Part II. Study of particle size and its influence on mass reduction. Forensic Sci Int 2014; 234:174-80. [DOI: 10.1016/j.forsciint.2013.09.001] [Citation(s) in RCA: 2] [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: 06/03/2013] [Revised: 08/23/2013] [Accepted: 09/01/2013] [Indexed: 10/26/2022]
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Dujourdy L, Csesztregi T, Bovens M, Franc A, Nagy J. Sampling of illicit drugs for quantitative analysis. Part I: Heterogeneity study of illicit drugs in Europe. Forensic Sci Int 2013; 231:249-56. [DOI: 10.1016/j.forsciint.2013.05.022] [Citation(s) in RCA: 7] [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] [Received: 10/16/2012] [Revised: 05/12/2013] [Accepted: 05/20/2013] [Indexed: 11/26/2022]
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Mesarčová L, Marcinčák S, Nagy J, Popelka P, Bača M, Jevinová P, Marcinčáková D. Effect of glaze and selected herbal extracts on lipid oxidation and sensory properties of frozen Atlantic herrings (Clupea harengusL.). Acta Alimentaria 2013. [DOI: 10.1556/aalim.42.2013.2.11] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Drueke T, Fernandez-Martin J, Locatelli F, London G, Gorriz J, Floege J, Ferreira A, Covic A, Memmos D, Bos WJ, Nagy J, Cannata-Andia J, Bhargava R, Ali F, Lear J, Bryan N, Law K, Brenchley P, Hutchison A, Turan MN, Yaprak M, Sisman AR, Yilmaz M, Kircelli F, Sevinc Ok E, Ozkahya M, Asci G, Ok E, Jean G, Chazot C, Lorriaux C, Deleaval P, Mayor B, Hurot JM. CKD-MBD - B. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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