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Krajewska J, Chyży P, Durka K, Wińska P, Krzyśko KA, Luliński S, Laudy AE. Aromatic Diboronic Acids as Effective KPC/AmpC Inhibitors. Molecules 2023; 28:7362. [PMID: 37959781 PMCID: PMC10648349 DOI: 10.3390/molecules28217362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 10/26/2023] [Accepted: 10/28/2023] [Indexed: 11/15/2023] Open
Abstract
Over 30 compounds, including para-, meta-, and ortho-phenylenediboronic acids, ortho-substituted phenylboronic acids, benzenetriboronic acids, di- and triboronated thiophenes, and pyridine derivatives were investigated as potential β-lactamase inhibitors. The highest activity against KPC-type carbapenemases was found for ortho-phenylenediboronic acid 3a, which at the concentration of 8/4 mg/L reduced carbapenems' MICs up to 16/8-fold, respectively. Checkerboard assays revealed strong synergy between carbapenems and 3a with the fractional inhibitory concentrations indices of 0.1-0.32. The nitrocefin hydrolysis test and the whole cell assay with E. coli DH5α transformant carrying blaKPC-3 proved KPC enzyme being its molecular target. para-Phenylenediboronic acids efficiently potentiated carbapenems against KPC-producers and ceftazidime against AmpC-producers, whereas meta-phenylenediboronic acids enhanced only ceftazidime activity against the latter ones. Finally, the statistical analysis confirmed that ortho-phenylenediboronic acids act synergistically with carbapenems significantly stronger than other groups. Since the obtained phenylenediboronic compounds are not toxic to MRC-5 human fibroblasts at the tested concentrations, they can be considered promising scaffolds for the future development of novel KPC/AmpC inhibitors. The complexation of KPC-2 with the most representative isomeric phenylenediboronic acids 1a, 2a, and 3a was modeled by quantum mechanics/molecular mechanics calculations. Compound 3a reached the most effective configuration enabling covalent binding to the catalytic Ser70 residue.
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Affiliation(s)
- Joanna Krajewska
- Department of Pharmaceutical Microbiology and Bioanalysis, Medical University of Warsaw, 02-097 Warsaw, Poland;
| | - Piotr Chyży
- Centre of New Technologies, University of Warsaw, 02-097 Warsaw, Poland;
| | - Krzysztof Durka
- Faculty of Chemistry, Warsaw University of Technology, 00-664 Warsaw, Poland; (K.D.); (P.W.); (S.L.)
| | - Patrycja Wińska
- Faculty of Chemistry, Warsaw University of Technology, 00-664 Warsaw, Poland; (K.D.); (P.W.); (S.L.)
| | | | - Sergiusz Luliński
- Faculty of Chemistry, Warsaw University of Technology, 00-664 Warsaw, Poland; (K.D.); (P.W.); (S.L.)
| | - Agnieszka E. Laudy
- Department of Pharmaceutical Microbiology and Bioanalysis, Medical University of Warsaw, 02-097 Warsaw, Poland;
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2
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Ailincai D, Turin Moleavin IA, Sarghi A, Fifere A, Dumbrava O, Pinteala M, Balan GG, Rosca I. New Hydrogels Nanocomposites Based on Chitosan, 2-Formylphenylboronic Acid, and ZnO Nanoparticles as Promising Disinfectants for Duodenoscopes Reprocessing. Polymers (Basel) 2023; 15:2669. [PMID: 37376315 DOI: 10.3390/polym15122669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 06/09/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023] Open
Abstract
New hydrogels nanocomposites, based on iminoboronate hydrogels and ZnO nanoparticles (ZnO-NPs), were obtained and characterised in order to develop a new class of disinfectants able to fight the nosocomial infections produced by duodenoscopes investigation procedures. The formation of the imine linkages between chitosan and the aldehyde was demonstrated using NMR and FTIR spectroscopy, while the supramolecular architecture of the developed systems was evaluated via wide-angle X-ray diffraction and polarised optical microscopy. The morphological characterisation of the systems via scanning electron microscopy revealed the highly porous structure of the materials, in which no ZnO agglomeration could be observed, indicating the very fine and homogenous encapsulation of the nanoparticles into the hydrogels. The newly synthetised hydrogels nanocomposites was proven to have synergistic antimicrobial properties, being very efficient as disinfectants against reference strains as: Enterococcus faecalis, Klebsiella pneumoniae, and Candida albicans.
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Affiliation(s)
- Daniela Ailincai
- "Petru Poni" Institute of Macromolecular Chemistry, 700487 Iasi, Romania
| | | | - Alexandra Sarghi
- "Petru Poni" Institute of Macromolecular Chemistry, 700487 Iasi, Romania
| | - Adrian Fifere
- "Petru Poni" Institute of Macromolecular Chemistry, 700487 Iasi, Romania
| | - Oana Dumbrava
- "Petru Poni" Institute of Macromolecular Chemistry, 700487 Iasi, Romania
| | - Mariana Pinteala
- "Petru Poni" Institute of Macromolecular Chemistry, 700487 Iasi, Romania
| | - Gheorghe G Balan
- Faculty of Medicine, 'Grigore T. Popa' University of Medicine, 700115 Iasi, Romania
- Institute of Gastroenterology and Hepatology, St. Spiridon Emergency County Hospital, 700111 Iasi, Romania
| | - Irina Rosca
- "Petru Poni" Institute of Macromolecular Chemistry, 700487 Iasi, Romania
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3
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Unger K, Coclite AM. Glucose-Responsive Boronic Acid Hydrogel Thin Films Obtained via Initiated Chemical Vapor Deposition. Biomacromolecules 2022; 23:4289-4295. [PMID: 36053563 PMCID: PMC9554909 DOI: 10.1021/acs.biomac.2c00762] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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Glucose-responsive materials are of great importance
in the field
of monitoring the physiological glucose level or smart insulin management.
This study presents the first vacuum-based deposition of a glucose-responsive
hydrogel thin film. The successful vacuum-based synthesis of a glucose-responsive
hydrogel may open the door to a vast variety of new applications,
where, for example, the hydrogel thin film is applied on new possible
substrates. In addition, vacuum-deposited films are free of leachables
(e.g., plasticizers and residual solvents). Therefore, they are, in
principle, safe for in-body applications. A hydrogel made of but-3-enylboronic
acid units, a boronic acid compound, was synthesized via initiated
chemical vapor deposition. The thin film was characterized in terms
of chemical composition, surface morphology, and swelling response
toward pH and sucrose, a glucose–fructose compound. The film
was stable in aqueous solutions, consisting of polymerized boronic
acid and the initiator unit, and had an undulating texture appearance
(rms 2.1 nm). The hydrogel was in its shrunken state at pH 4–7
and swelled by increasing the pH to 9. The pKa was 8.2 ± 0.2. The response to glucose was observed
at pH 10 and resulted in thickness shrinking.
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Affiliation(s)
- Katrin Unger
- Institute of Solid State Physics, NAWI Graz, Graz University of Technology, 8010 Graz, Austria
| | - Anna Maria Coclite
- Institute of Solid State Physics, NAWI Graz, Graz University of Technology, 8010 Graz, Austria
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4
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Abid HU, Hanif M, Mahmood K, Aziz M, Abbas G, Latif H. Wound-Healing and Antibacterial Activity of the Quercetin-4-Formyl Phenyl Boronic Acid Complex against Bacterial Pathogens of Diabetic Foot Ulcer. ACS OMEGA 2022; 7:24415-24422. [PMID: 35874257 PMCID: PMC9301639 DOI: 10.1021/acsomega.2c01819] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Complications of diabetic foot can be prevented using a naturally occurring, efficient, and newly synthesized antimicrobial agent. The purpose of the study was to improve wound healing and antibacterial effects of quercetin and its esterified complex with 4-formyl phenyl boronic acid (4FPBA-Q) compared with phenytoin. The formation of the 4FPBA-Q complex was confirmed by thin-layer chromatography (TLC), Fourier transform infrared (FTIR) spectroscopy, and mass spectrometry (MS). The prepared 4FPBA-Q complex was used against Gram-positive bacteria along with Gram-negative bacteria, and more than 2-fold decrease in minimum inhibitory concentrations (MIC) was observed compared to pure quercetin. Scanning electron microscopic images of Pseudomonas aeruginosa and Staphylococcus aureus showed their complete destruction after incubation with the 4FPBA-Q complex even after 3 h. Interestingly, wound-healing properties of the 4FPBA-Q complex in infected diabetic rats increased from 64 to 99% as compared to phenytoin, which were increased from those of noninfected diabetic rats. Furthermore, histopathological evaluations showed significantly enhanced wound healing, re-epithelialization, fibroblasts, and angiogenesis in wounds of diabetic rats after 10 days. Conclusively, reduction in the primary irritation index (PDII) and improved antibacterial and wound-healing properties render the 4FPBA-Q complex ideal for diabetic foot ulcer treatment.
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Affiliation(s)
- Hafiz
Muhammad Usman Abid
- Department
of Pharmaceutics, Faculty of Pharmacy, Bahauddin
Zakariya University, Multan 60800, Pakistan
- Institute
of Chemical Sciences, Bahauddin Zakariya
University, Multan 60800, Pakistan
| | - Muhammad Hanif
- Department
of Pharmaceutics, Faculty of Pharmacy, Bahauddin
Zakariya University, Multan 60800, Pakistan
| | - Khalid Mahmood
- Institute
of Chemical Sciences, Bahauddin Zakariya
University, Multan 60800, Pakistan
| | - Mubashir Aziz
- Department
of Microbiology, Bahauddin Zakariya University, Multan 60800, Pakistan
| | - Ghulam Abbas
- Department
of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University, Faisalabad 38000, Pakistan
| | - Hafsa Latif
- Department
of Pharmaceutics, Faculty of Pharmacy, Bahauddin
Zakariya University, Multan 60800, Pakistan
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Adamczyk-Woźniak A, Sporzyński A. Merging Electron Deficient Boronic Centers with Electron-Withdrawing Fluorine Substituents Results in Unique Properties of Fluorinated Phenylboronic Compounds. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27113427. [PMID: 35684365 PMCID: PMC9182515 DOI: 10.3390/molecules27113427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 05/20/2022] [Accepted: 05/23/2022] [Indexed: 11/16/2022]
Abstract
Fluorinated boron species are a very important group of organoboron compounds used first of all as receptors of important bioanalytes, as well as biologically active substances, including Tavaborole as an antifungal drug. The presence of substituents containing fluorine atoms increases the acidity of boronic compounds, which is crucial from the point of view of their interactions with analytes or certain pathogen's enzymes. The review discusses the electron acceptor properties of fluorinated boronic species using both the acidity constant (pKa) and acceptor number (AN) in connection with their structural parameters. The NMR spectroscopic data are also presented, with particular emphasis on 19F resonance due to the wide range of information that can be obtained from this technique. Equilibria in solutions, such as the dehydration of boronic acid to form boroxines and their esterification or cyclization with the formation of 3-hydroxyl benzoxaboroles, are discussed. The results of the latest research on the biological activity of boronic compounds by experimental in vitro methods and theoretical calculations using docking studies are also discussed.
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Affiliation(s)
- Agnieszka Adamczyk-Woźniak
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
- Correspondence: (A.A.-W.); (A.S.); Tel.: +48-22-2345737 (A.A.-W.)
| | - Andrzej Sporzyński
- Faculty of Agriculture and Forestry, University of Warmia and Mazury, Oczapowskiego 2, 10-719 Olsztyn, Poland
- Correspondence: (A.A.-W.); (A.S.); Tel.: +48-22-2345737 (A.A.-W.)
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6
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Adamczyk-Woźniak A, Tarkowska M, Lazar Z, Kaczorowska E, Madura ID, Maria Dąbrowska A, Lipok J, Wieczorek D. Synthesis, structure, properties and antimicrobial activity of para trifluoromethyl phenylboronic derivatives. Bioorg Chem 2021; 119:105560. [PMID: 34942467 DOI: 10.1016/j.bioorg.2021.105560] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 11/15/2021] [Accepted: 12/11/2021] [Indexed: 01/16/2023]
Abstract
The [2-formyl-4-(trifluoromethyl)phenyl]boronic acid as well as its benzoxaborole and bis(benzoxaborole) derivatives were obtained and their properties studied. The 2-formyl compound displays an unusual structure in the crystalline state, with a significant twist of the boronic group, whereas in DMSO solution it tautomerizes with formation of a cyclic isomer. All the studied compounds exhibit relatively high acidity as well as a reasonable antimicrobial activity. Docking studies showed interactions of all the investigated compounds with the binding pocket of Candida albicans LeuRS. High activity against Bacillus cereus was determined for the 2-formyl compound as well as for the novel bis(benzoxaborole), whereas the studied benzoxaborole shows high antifungal action with MIC values equal to 7.8and 3.9 μg/mL against C. albicans and A. niger respectively. None of the studied compounds exhibits reasonable activity against E. coli.
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Affiliation(s)
| | - Magdalena Tarkowska
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, Warsaw 00-664 , Poland
| | - Zofia Lazar
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, Warsaw 00-664 , Poland
| | - Ewa Kaczorowska
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, Warsaw 00-664 , Poland
| | - Izabela D Madura
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, Warsaw 00-664 , Poland
| | - Anna Maria Dąbrowska
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, Warsaw 00-664 , Poland
| | - Jacek Lipok
- Faculty of Chemistry, University of Opole, Oleska 48, Opole 45-052 , Poland
| | - Dorota Wieczorek
- Faculty of Chemistry, University of Opole, Oleska 48, Opole 45-052 , Poland
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7
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Vibrational Properties of Benzoxaboroles and Their Interactions with Candida albicans’ LeuRS. Symmetry (Basel) 2021. [DOI: 10.3390/sym13101845] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Benzoxaboroles have emerged over the past decade mainly due to their growing medicinal importance. Regarding the wide application of IR spectroscopy in the pharmaceutical industry, the vibrational properties of over a dozen of benzoxaboroles were described, based on results of DFT calculations as well as IR and Raman spectra measurements. Investigated series of compounds included the currently available antifungal drug (Tavaborole, AN2690) as well as its derivatives. An intense and well-isolated band corresponding to the B-OH group stretching vibrations was present in all experimental IR spectra in the range of 1446–1414 cm−1 and can be considered as characteristic for benzoxaboroles. The vibrational properties of benzoxaboroles are shown to be affected by the formation of intramolecular as well as intermolecular hydrogen bonds, which should also influence the interactions of benzoxaboroles with biomolecules and impact on their biological functions. Docking studies of the benzoxaboroles’ adenosine monophosphate (AMP) spiroboronates into the Candida albicans leucyl-RS synthetase binding pocket showed that the introduction of an amine substituent has a strong influence on their binding. The determined values of inhibition constants manifest high potential of some of the investigated molecules as possible inhibitors of that enzyme.
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8
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Douglas CD, Grandinetti L, Easton NM, Kuehm OP, Hayden JA, Hamilton MC, St Maurice M, Bearne SL. Slow-Onset, Potent Inhibition of Mandelate Racemase by 2-Formylphenylboronic Acid. An Unexpected Adduct Clasps the Catalytic Machinery. Biochemistry 2021; 60:2508-2518. [PMID: 34339165 DOI: 10.1021/acs.biochem.1c00374] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
o-Carbonyl arylboronic acids such as 2-formylphenylboronic acid (2-FPBA) are employed in biocompatible conjugation reactions with the resulting iminoboronate adduct stabilized by an intramolecular N-B interaction. However, few studies have utilized these reagents as active site-directed enzyme inhibitors. We show that 2-FPBA is a potent reversible, slow-onset inhibitor of mandelate racemase (MR), an enzyme that has served as a valuable paradigm for understanding enzyme-catalyzed abstraction of an α-proton from a carbon acid substrate with a high pKa. Kinetic analysis of the progress curves for the slow onset of inhibition of wild-type MR using a two-step kinetic mechanism gave Ki and Ki* values of 5.1 ± 1.8 and 0.26 ± 0.08 μM, respectively. Hence, wild-type MR binds 2-FPBA with an affinity that exceeds that for the substrate by ∼3000-fold. K164R MR was inhibited by 2-FPBA, while K166R MR was not inhibited, indicating that Lys 166 was essential for inhibition. Unexpectedly, mass spectrometric analysis of the NaCNBH3-treated enzyme-inhibitor complex did not yield evidence of an iminoboronate adduct. 11B nuclear magnetic resonance spectroscopy of the MR·2-FPBA complex indicated that the boron atom was sp3-hybridized (δ 6.0), consistent with dative bond formation. Surprisingly, X-ray crystallography revealed the formation of an Nζ-B dative bond between Lys 166 and 2-FPBA with intramolecular cyclization to form a benzoxaborole, rather than the expected iminoboronate. Thus, when o-carbonyl arylboronic acid reagents are employed to modify proteins, the structure of the resulting product depends on the protein architecture at the site of modification.
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Affiliation(s)
- Colin D Douglas
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Lia Grandinetti
- Department of Biological Sciences, Marquette University, Milwaukee, Wisconsin 53201-1881, United States
| | - Nicole M Easton
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Oliver P Kuehm
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Joshua A Hayden
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Meghan C Hamilton
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Martin St Maurice
- Department of Biological Sciences, Marquette University, Milwaukee, Wisconsin 53201-1881, United States
| | - Stephen L Bearne
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada
- Department of Chemistry, Dalhousie University, Halifax, NS B3H 4R2, Canada
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Adamczyk-Woźniak A, Gozdalik JT, Kaczorowska E, Durka K, Wieczorek D, Zarzeczańska D, Sporzyński A. (Trifluoromethoxy)Phenylboronic Acids: Structures, Properties, and Antibacterial Activity. Molecules 2021; 26:molecules26072007. [PMID: 33916124 PMCID: PMC8036725 DOI: 10.3390/molecules26072007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 03/24/2021] [Accepted: 03/27/2021] [Indexed: 12/20/2022] Open
Abstract
Three isomers of (trifluoromethoxy)phenylboronic acids were studied in the context of their physicochemical, structural, antimicrobial and spectroscopic properties. They were characterized by 1H, 13C, 11B and 19F NMR spectroscopy. The acidity of all the isomers was evaluated by both spectrophotometric and potentiometric titrations. The introduction of the -OCF3 group influences the acidity, depending, however, on the position of a substituent, with the ortho isomer being the least acidic. Molecular and crystal structures of ortho and para isomers were determined by the single crystal XRD method. Hydrogen bonded dimers are the basic structural motives of the investigated molecules in the solid state. In the case of the ortho isomer, intramolecular hydrogen bond with the -OCF3 group is additionally formed, weaker, however, than that in the analogous -OCH3 derivative, which has been determined by both X-Ray measurements as well as theoretical DFT calculations. Docking studies showed possible interactions of the investigated compounds with LeuRS of Escherichia coli. Finally, the antibacterial potency of studied boronic acids in vitro were evaluated against Escherichia coli and Bacillus cereus.
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Affiliation(s)
- Agnieszka Adamczyk-Woźniak
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland; (J.T.G.); (E.K.); (K.D.)
- Correspondence:
| | - Jan T. Gozdalik
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland; (J.T.G.); (E.K.); (K.D.)
| | - Ewa Kaczorowska
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland; (J.T.G.); (E.K.); (K.D.)
| | - Krzysztof Durka
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland; (J.T.G.); (E.K.); (K.D.)
| | - Dorota Wieczorek
- Faculty of Chemistry, University of Opole, Oleska 48, 45-052 Opole, Poland;
| | - Dorota Zarzeczańska
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland;
| | - Andrzej Sporzyński
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland; (J.T.G.); (E.K.); (K.D.)
- Faculty of Agriculture and Forestry, University of Warmia and Mazury, Oczapowskiego 8, 10-719 Olsztyn, Poland;
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Wieczorek D, Kaczorowska E, Wiśniewska M, Madura ID, Leśniak M, Lipok J, Adamczyk-Woźniak A. Synthesis and Influence of 3-Amino Benzoxaboroles Structure on Their Activity against Candida albicans. Molecules 2020; 25:E5999. [PMID: 33352986 PMCID: PMC7766895 DOI: 10.3390/molecules25245999] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 12/09/2020] [Accepted: 12/15/2020] [Indexed: 11/16/2022] Open
Abstract
Benzoxaboroles emerged recently as molecules of high medicinal potential with Kerydin® (Tavaborole) and Eucrisa® (Crisaborole) currently in clinical practice as antifungal and anti-inflammatory drugs, respectively. Over a dozen of 3-amino benzoxaboroles, including Tavaborole's derivatives, have been synthetized and characterized in terms of their activity against Candida albicans as a model pathogenic fungus. The studied compounds broaden considerably the structural diversity of reported benzoxaboroles, enabling determination of the influence of the introduction of a heterocyclic amine, a fluorine substituent as well as the formyl group on antifungal activity of those compounds. The determined zones of the growth inhibition of examined microorganism indicate high diffusion of majority of the studied compounds within the applied media as well as their reasonable activity. The Minimum Inhibitory Concentration (MIC) values show that the introduction of an amine substituent in position "3" of the benzoxaborole heterocyclic ring results in a considerable drop in activity in comparison with Tavaborole (AN2690) as well as unsubstituted benzoxaborole (AN2679). In all studied cases the presence of a fluorine substituent at position para to the boron atom results in lower MIC values (higher activity). Interestingly, introduction of a fluorine substituent in the more distant piperazine phenyl ring does not influence MIC values. As determined by X-ray studies, introduction of a formyl group in proximity of the boron atom results in a considerable change of the boronic group geometry. The presence of a formyl group next to the benzoxaborole unit is also detrimental for activity against Candida albicans.
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Affiliation(s)
- Dorota Wieczorek
- Faculty of Chemistry, University of Opole, Oleska 48, 45-052 Opole, Poland; (D.W.); (J.L.)
| | - Ewa Kaczorowska
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland; (E.K.); (M.W.); (I.D.M.); (M.L.)
| | - Marta Wiśniewska
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland; (E.K.); (M.W.); (I.D.M.); (M.L.)
| | - Izabela D. Madura
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland; (E.K.); (M.W.); (I.D.M.); (M.L.)
| | - Magdalena Leśniak
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland; (E.K.); (M.W.); (I.D.M.); (M.L.)
| | - Jacek Lipok
- Faculty of Chemistry, University of Opole, Oleska 48, 45-052 Opole, Poland; (D.W.); (J.L.)
| | - Agnieszka Adamczyk-Woźniak
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland; (E.K.); (M.W.); (I.D.M.); (M.L.)
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11
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Adamczyk-Woźniak A, Sporzyński A. The influence of ortho-substituents on the properties of phenylboronic acids. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121202] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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