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Bartáček J, Svoboda J, Kocúrik M, Pochobradský J, Čegan A, Sedlák M, Váňa J. Recent advances in palladium-catalysed asymmetric 1,4-additions of arylboronic acids to conjugated enones and chromones. Beilstein J Org Chem 2021; 17:1048-1085. [PMID: 34093877 PMCID: PMC8144908 DOI: 10.3762/bjoc.17.84] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Accepted: 04/17/2021] [Indexed: 11/30/2022] Open
Abstract
The transition metal (palladium)-catalysed asymmetric 1,4-addition of arylboronic acids to conjugated enones belong to the most important and emerging strategies for the construction of C-C bonds in an asymmetric fashion. This review covers known catalytic systems used for this transformation. For clarity, we are using the type of ligand as a sorting criterion. Finally, we attempted to create a flowchart facilitating the selection of a suitable ligand for a given combination of enone and arylboronic acid.
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Affiliation(s)
- Jan Bartáček
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Jan Svoboda
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Martin Kocúrik
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Jaroslav Pochobradský
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Alexander Čegan
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Miloš Sedlák
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Jiří Váňa
- Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
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Mužáková V, Meloun M, Jindrová A, Čegan A. The effect of fatty acids in red blood cell membranes on the dynamics of inflammatory markers following the coronary stent implantation. J Pharm Biomed Anal 2019; 166:310-325. [PMID: 30690246 DOI: 10.1016/j.jpba.2019.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 01/02/2019] [Accepted: 01/03/2019] [Indexed: 10/27/2022]
Abstract
The effect of 20 fatty acids in erythrocyte cell membranes on the extent of inflammatory response and cell oxidative stress was evaluated using multidimensional statistical data analysis in 54 patients suffering from ischemic heart disease undergoing percutaneous coronary intervention with coronary stent implantation using multidimensional statistical data analysis. A systemic inflammatory response was indicated by an increase of C-reactive protein (CRP), serum amyloid A (SAA) and ceruloplasmin 48 h after stent implantation and by an increase of interleukin-6 (IL-6) 24 h after intervention. The increase of malondialdehyde (MDA) after 48 h was used as a marker of cell damage by oxidative stress. Multiple linear regression revealed statistically significant relationships between concentration of some fatty acids and the magnitude of inflammatory response, or oxidative stress, after stent implantation. The most significant relationship with an increase of plasma CRP was found for myristic acid and, to a lesser extent, for oleic acid. Trans octadecenoic acid, and to a lesser extent palmitooleic and nervonic fatty acids were found in inverse correlation with the CRP increase. The increase of IL-6 showed a statistically significant correlation with myristic acid, to a lesser extent with cis-9-eicosenoic acid and to the least extent with docosahexaenoic acid, inversely with pentadecanoic, γ-linolenic and stearic acids. An increase of oxidative stress (MDA) significantly correlated only with γ-linolenic acid. Other studied markers of inflammatory response to coronary stenting were SAA and ceruloplasmin (Cp). Statistical evaluation revealed that SAA and Cp are not suitable markers for assessment relationships between inflammation and erythrocyte membrane fatty acids.
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Affiliation(s)
- Vladimíra Mužáková
- Department of Biological and Biochemical Sciences, University of Pardubice, 532 10 Pardubice, Czech Republic
| | - Milan Meloun
- Department of Analytical Chemistry, University of Pardubice, 532 10 Pardubice, Czech Republic.
| | - Andrea Jindrová
- Department of Biological and Biochemical Sciences, University of Pardubice, 532 10 Pardubice, Czech Republic
| | - Alexander Čegan
- Department of Biological and Biochemical Sciences, University of Pardubice, 532 10 Pardubice, Czech Republic
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Komersová A, Kovářová M, Komers K, Lochař V, Čegan A. Why is the hydrolytic activity of acetylcholinesterase pH dependent? Kinetic study of acetylcholine and acetylthiocholine hydrolysis catalyzed by acetylcholinesterase from electric eel. Z NATURFORSCH C 2018; 73:345-351. [PMID: 29936491 DOI: 10.1515/znc-2017-0134] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 04/16/2018] [Indexed: 11/15/2022]
Abstract
Abstract
The dependence of the activity of acetylcholinesterase from electric eel at a pH value range of 4.8–9.8 (phosphate buffer), regarding acetylcholine and acetylthiocholine hydrolysis, was determined at 25 °C, ionic strength of 0.11 M, and initial substrate concentration of 4 mM. At a pH range of 4.8–9.8, the dependences A(pH) form a sigmoid increasing curve with the maximum catalytic activity at a pH range 8–9.5. For acetylcholine hydrolysis, the kinetic reason for such an increase in A consists mainly of an increase in the rate constant k
2 (Michaelis-Menten) model with increasing pH of the reaction mixture. For acetylthiocholine hydrolysis, the kinetic explication of the determined dependence A(pH) is more complicated.
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Affiliation(s)
- Alena Komersová
- Department of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Markéta Kovářová
- Department of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Karel Komers
- Department of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Václav Lochař
- Department of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic, Fax: +420-466-037-068
| | - Alexander Čegan
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 523 10 Pardubice, Czech Republic
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Kostelník A, Čegan A, Pohanka M. Biperiden is an inhibitor of acetylcholinesterase. Toxicol Lett 2017. [DOI: 10.1016/j.toxlet.2017.07.226] [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]
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Kanďár R, Drábková P, Toiflová T, Čegan A. Determination of Selected Amino Acids in Serum of Patients with Liver Disease. ADV CLIN EXP MED 2016; 25:1227-1239. [PMID: 28028978 DOI: 10.17219/acem/63751] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 08/07/2015] [Accepted: 06/17/2016] [Indexed: 11/24/2022]
Abstract
BACKGROUND The determination of amino acids can be a reliable approach for extended diagnosis of liver diseases. This is because liver disease can be a cause of impaired amino acid metabolism. Therefore, a method for the determination of serum amino acids, applicable for clinical purposes, is necessary. OBJECTIVES The aim of this study was to find differences in the levels of selected amino acids between patients with liver disease and a control group. MATERIAL AND METHODS Samples of peripheral venous blood were obtained from a group of patients with liver disease (n = 131, 59 women at an average age of 60 years and 72 men at an average age of 52 years) and a control group (n = 105, 47 women at an average age of 62 years and 58 men at an average age of 58 years). Before the separation, the amino acids were derivatized with naphthalene-2,3-dicarboxaldehyde. For the separation, reverse phase column was used. The effluent was monitored with a fluorescence detector. RESULTS There were significant differences in the concentrations of some amino acids between the patients and the control group, but also between women and men. Correlations between some amino acids and markers of liver blood tests and lipid metabolism were observed. CONCLUSIONS A simple, relatively rapid and selective HPLC method with fluorescence detection for the determination of selected amino acids in serum has been developed.
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Affiliation(s)
- Roman Kanďár
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Czech Republic
| | - Petra Drábková
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Czech Republic
| | - Tereza Toiflová
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Czech Republic
| | - Alexander Čegan
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Czech Republic
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Kanďár R, Drábková P, Andrlová L, Kostelník A, Čegan A. Determination of selected fatty acids in dried sweat spot using gas chromatography with flame ionization detection. J Sep Sci 2016; 39:4377-4383. [DOI: 10.1002/jssc.201600513] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 09/05/2016] [Accepted: 09/06/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Roman Kanďár
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology; University of Pardubice; Pardubice Czech Republic
| | - Petra Drábková
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology; University of Pardubice; Pardubice Czech Republic
| | - Lenka Andrlová
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology; University of Pardubice; Pardubice Czech Republic
| | - Adam Kostelník
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology; University of Pardubice; Pardubice Czech Republic
| | - Alexander Čegan
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology; University of Pardubice; Pardubice Czech Republic
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Čermák T, MuŽáková V, Matějka J, Skalický J, Laštovička P, Líbalová M, Kanďár R, Novotný V, Čegan A. Fatty acid profile in erythrocyte membranes and plasma phospholipids affects significantly the extent of inflammatory response to coronary stent implantation. Physiol Res 2016; 65:941-951. [PMID: 27539101 DOI: 10.33549/physiolres.933194] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
In coronary heart disease, the treatment of significant stenosis by percutaneous coronary intervention (PCI) with stent implantation elicits local and systemic inflammatory responses. This study was aimed at evaluation of the dynamics of inflammatory response and elucidation of the relationship between the fatty acid profile of red blood cell (RBC) membranes or plasma phospholipids and inflammation after PCI. High-sensitivity C-reactive protein (hsCRP), interleukin-6 (IL-6), serum amyloid A (SAA), malondialdehyde (MDA) and the fatty acid profiles were determined in patients with advanced coronary artery disease undergoing PCI before, 24 h and 48 h after drug-eluting stent implantation (n=36). Patients after PCI exhibited a significant increase in studied markers (hsCRP, IL-6, SAA, MDA). Many significant associations were found between the increase of IL-6, resp. SAA and the amounts of n-6 polyunsaturated fatty acids (namely linoleic, dihomo-gamma-linolenic, docosatetraenoic and docosapentaenoic acid), resp. saturated fatty acids (pentadecanoic, stearic, nonadecanoic) in erythrocyte membranes. The magnitude of the inflammatory response to PCI is related to erythrocyte membrane fatty acid profile, which seems to be a better potential predictor of elevation of inflammatory markers after PCI than plasma phospholipids.
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Affiliation(s)
- T Čermák
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic.
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Čermák T, Laštovička P, Mužáková V, Líbalová M, Koukalová L, Kanďár R, Čegan A. Association of fatty acid profile in plasma lipid fractions with HbA1c in type 2 diabetic patients. Int J Diabetes Dev Ctries 2015. [DOI: 10.1007/s13410-015-0399-8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
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Štramová X, Čegan A, Hampl R, Kanďár R. Effects of smoking on fatty acid composition of phospholipid sperm membrane and the malondialdehyde levels in human seminal plasma. Andrologia 2014; 47:967-73. [DOI: 10.1111/and.12365] [Citation(s) in RCA: 2] [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] [Accepted: 08/29/2014] [Indexed: 12/14/2022] Open
Affiliation(s)
- X. Štramová
- Department of Biological and Biochemical Sciences; Faculty of Chemical Technology; Pardubice Czech Republic
| | - A. Čegan
- Department of Biological and Biochemical Sciences; Faculty of Chemical Technology; Pardubice Czech Republic
| | - R. Hampl
- Sanus Centre of Assisted Reproduction; Pardubice Czech Republic
| | - R. Kanďár
- Department of Biological and Biochemical Sciences; Faculty of Chemical Technology; Pardubice Czech Republic
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Sedlák M, Hanusek J, Drabina P, Štěpánková Š, Čegan A. Substituted benzyl N-phenylcarbamates – their solvolysis and inhibition activity to acetylcholinesterase and butyrylcholinesterase. ARKIVOC 2009. [DOI: 10.3998/ark.5550190.0010.701] [Citation(s) in RCA: 3] [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] [Indexed: 11/04/2022] Open
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Soukupová L, Komersová A, Komers K, Štěpánková Š, Čegan A. Kinetics of the total hydrolysis of acetyl-β-methylcholine by acetylcholinesterase. ACTA ACUST UNITED AC 2008. [DOI: 10.1007/s11144-008-5340-4] [Citation(s) in RCA: 2] [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: 12/01/2022]
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Čegan A, Šlosar J, Večeřa M. Hydrolysis kinetics and mechanism of N'-aryl-N,N-dimethylformamidines in alkaline medium. ACTA ACUST UNITED AC 1978. [DOI: 10.1135/cccc19780134] [Citation(s) in RCA: 3] [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: 11/05/2022]
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