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Mansour AM, Radacki K, Mostafa GAE, Ali EA, Shehab OR. Antimicrobial properties of triazolato terpyridine Pd(II) and Pt(II) complexes formed by [3+2] cycloaddition coupling reaction. Bioorg Chem 2024; 146:107262. [PMID: 38467092 DOI: 10.1016/j.bioorg.2024.107262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 02/18/2024] [Accepted: 03/05/2024] [Indexed: 03/13/2024]
Abstract
Modern classes of antimicrobials are crucial because most drugs in development today are basically antibiotic derivatives. Even though a large number of metal-based compounds have been studied as antimicrobial agents, relatively few studies have examined the antimicrobial properties of Pd(II) and Pt(II) compounds. The [3+2] cycloaddition reactions of [M(N3)L]PF6 (M = Pd(II) and Pt(II); L = 4'-(2-pyridyl)-2,2':6',2″-terpyridine) with 4,4,4-trifluoro-2-butynoic acid ethyl ester gave the corresponding triazolate complexes. The reaction products were fully characterized with a variety of analytical and spectroscopic tools including X-ray crystallographic analysis. The crystal structure of [Pd(triazolatoCF3,COOCH2CH3)L]PF6 provided cut-off evidence that the kinetically formed N1-triazolato isomer favoured the isomerization to the thermodynamically stable N2-analogue. The experimental work was complemented with computational work to get an insight into the nature of the predominant triazolate isomer. The lysozyme binding affinity of the triazolate complexes was examined by mass spectrometry. An analysis of the lysozyme Pd(II) adducts suggests a coordinative covalent mode of binding via the loss of the triazolato ligand. The free ligand and its triazolate complexes displayed selective toxicity against Candida albicans and Cryptococcus neoformans, while no cytotoxicity was observed against the normal human embryonic kidney cell line.
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Affiliation(s)
- Ahmed M Mansour
- Department of Chemistry, United Arab Emirates University, Al-Ain, United Arab Emirates; Department of Chemistry, Cairo University, Faculty of Science, Gamma Street, Giza, Cairo 12613, Egypt.
| | - Krzysztof Radacki
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Gamal A E Mostafa
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Essam A Ali
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Ola R Shehab
- Department of Chemistry, Cairo University, Faculty of Science, Gamma Street, Giza, Cairo 12613, Egypt
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2
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Gayatri M, Jothipandiyan S, Azeez MKA, Sudharsan M, Suresh D, Nithyanand P. Novel thiazolinyl-picolinamide-based palladium(II) complex extenuates the virulence and biofilms of vulvovaginal candidiasis (VVC) causing Candida. Int Microbiol 2024:10.1007/s10123-024-00497-8. [PMID: 38467906 DOI: 10.1007/s10123-024-00497-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 03/01/2024] [Accepted: 03/05/2024] [Indexed: 03/13/2024]
Abstract
Candida infections are growing all over the world as a result of their resistance to anti-fungal drugs. This raises concerns about public health, particularly in cases of vulvovaginal candidiasis (VVC). Therefore, the need for effective treatment options for Candida infections has become crucial. The main goal of the study is to evaluate the efficacy of novel palladium metal complexes against fluconazole-resistant Candida spp., particularly C. albicans and C. auris. The process begins with identifying the minimum inhibitory concentration (MIC), followed by growth curve assays, colony morphology analysis, characterization, and gene expression analysis. The investigation revealed that sub-MIC of Pd(II) complex B (250 μg/mL) inhibited Candida spp. more effectively than amphotericin B (500 μg/mL). Further, Pd(II) complex B drastically reduced the growth of Candida spp. biofilms by 70-80% for nascent biofilms and 70-75% for mature biofilms. Additionally, the yeast-to-hyphal switch and SEM studies revealed that Pd(II) complex B effectively hinders the growth of drug-resistant Candida cells. The gene expression investigation also evidenced that Pd(II) complex B downregulated virulence genes in C. albicans (ERG, EFG, UME6, and HGC) and C. auris (ERG, CDR, and HGC). The findings showed that Pd(II) complex B effectively inhibited the growth of Candida biofilm formation and was reported as a potential anti-biofilm agent against Candida spp. that are resistant to drugs.
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Affiliation(s)
- Munieswaran Gayatri
- Biofilm Biology Laboratory, Centre for Research on Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed University, Tirumalaisamudram, Thanjavur, Tamil Nadu, 613401, India
- Organometallics and Catalysis Laboratory, Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University, Tirumalaisamudram, Thanjavur, Tamil Nadu, 613401, India
| | - Sowndarya Jothipandiyan
- Biofilm Biology Laboratory, Centre for Research on Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed University, Tirumalaisamudram, Thanjavur, Tamil Nadu, 613401, India
| | - Mohamed Khalid Abdul Azeez
- Biofilm Biology Laboratory, Centre for Research on Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed University, Tirumalaisamudram, Thanjavur, Tamil Nadu, 613401, India
| | - Murugesan Sudharsan
- Organometallics and Catalysis Laboratory, Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University, Tirumalaisamudram, Thanjavur, Tamil Nadu, 613401, India
| | - Devarajan Suresh
- Organometallics and Catalysis Laboratory, Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University, Tirumalaisamudram, Thanjavur, Tamil Nadu, 613401, India.
| | - Paramasivam Nithyanand
- Biofilm Biology Laboratory, Centre for Research on Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed University, Tirumalaisamudram, Thanjavur, Tamil Nadu, 613401, India.
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3
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van Niekerk A, Joseph MC, Kavanagh A, Dinh H, Swarts AJ, Mapolie SF, Zuegg J, Cain AK, Elliott AG, Blaskovich MAT, Frei A. The Antimicrobial Properties of Pd II - and Ru II -pyta Complexes. Chembiochem 2023; 24:e202300247. [PMID: 37593808 PMCID: PMC10947176 DOI: 10.1002/cbic.202300247] [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: 03/29/2023] [Revised: 08/16/2023] [Accepted: 08/16/2023] [Indexed: 08/19/2023]
Abstract
Infections associated with antimicrobial resistance (AMR) are poised to become the leading cause of death in the next few decades, a scenario that can be ascribed to two phenomena: antibiotic over-prescription and a lack of antibiotic drug development. The crowd-sourced initiative Community for Open Antimicrobial Drug Discovery (CO-ADD) has been testing research compounds contributed by researchers around the world to find new antimicrobials to combat AMR, and during this campaign has found that metallodrugs might be a promising, yet untapped source. To this end, we submitted 18 PdII - and RuII -pyridyl-1,2,3-triazolyl complexes that were developed as catalysts to assess their antimicrobial properties. It was found that the Pd complexes, especially Pd1, possessed potent antifungal activity with MICs between 0.06 and 0.125 μg mL-1 against Candida glabrata. The in-vitro studies were extended to in-vivo studies in Galleria mellonella larvae, where it was established that the compounds were nontoxic. Here, we effectively demonstrate the potential of PdII -pyta complexes as antifungal agents.
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Affiliation(s)
- Annick van Niekerk
- Department of Chemistry and Polymer ScienceUniversity of StellenboschStellenbosch, Private bag X1, Matieland7602South Africa
| | - M. Cassiem Joseph
- Molecular Science Institute, School of ChemistryUniversity of the WitwatersrandJohannesburg, PO Wits2050South Africa
| | - Angela Kavanagh
- Centre for Superbug Solutions Institute for Molecular BioscienceThe University of QueenslandSt. LuciaQueensland4072Australia
| | - Hue Dinh
- School of Natural Sciences ARC Centre of Excellence in Synthetic BiologyMacquarie UniversitySydneyNSW2109Australia
| | - Andrew J. Swarts
- Molecular Science Institute, School of ChemistryUniversity of the WitwatersrandJohannesburg, PO Wits2050South Africa
| | - Selwyn F. Mapolie
- Department of Chemistry and Polymer ScienceUniversity of StellenboschStellenbosch, Private bag X1, Matieland7602South Africa
| | - Johannes Zuegg
- Centre for Superbug Solutions Institute for Molecular BioscienceThe University of QueenslandSt. LuciaQueensland4072Australia
| | - Amy K. Cain
- School of Natural Sciences ARC Centre of Excellence in Synthetic BiologyMacquarie UniversitySydneyNSW2109Australia
| | - Alysha G. Elliott
- Centre for Superbug Solutions Institute for Molecular BioscienceThe University of QueenslandSt. LuciaQueensland4072Australia
| | - Mark A. T. Blaskovich
- Centre for Superbug Solutions Institute for Molecular BioscienceThe University of QueenslandSt. LuciaQueensland4072Australia
| | - Angelo Frei
- Dept. of Chemistry, Biochemistry & Pharmaceutical SciencesUniversity of BernFreiestrasse 33012BernSwitzerland
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4
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Mohammadi Hadloo S, Mohseni Kouchesfahani H, Khanlarkhani A, Saeidifar M. Resistance Improvement and Sensitivity Enhancement of Cancer Therapy by a Novel Antitumor Candidate onto A2780 CP and A2780 S Cell Lines. Rep Biochem Mol Biol 2023; 12:374-385. [PMID: 38618266 PMCID: PMC11015932 DOI: 10.61186/rbmb.12.3.374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Accepted: 09/15/2023] [Indexed: 04/16/2024]
Abstract
Background To overcome cisplatin resistance, the cytotoxicity of a novel antitumor agent on two ovarian cancer cell lines sensitive and resistant to cisplatin was investigated. Methods MTT assay and flow cytometry were performed to assess the cytotoxicity of a novel water-soluble Pd (II) complex, [Pd(bpy)(pyr-dtc)]NO3 (PBPD), on cisplatin-sensitive and cisplatin-resistant ovarian cancer cell lines. Furthermore, variations in the expression of drug resistance gene cluster of differentiation 99 (CD99), signal transducer and activator of transcription 3 (STAT3), octamer-binding transcription factor 4 (OCT4), and multidrug resistance mutation 1 (MDR1) were evaluated using Real-Time PCR. Results The IC50 values of PBPD in resistant cells were higher than those in sensitive cells. Furthermore, PBPD has a deadlier effect on sensitive cells compared to resistant cells, and the cell survival rate is reduced over time. Flow cytometry revealed that PBPD enhanced the population of living-resistant cells while driving them to apoptosis. PBPD, on the other hand, has a greater effect on the living cell population and has dramatically shifted the population toward apoptosis and necrosis in the sensitive cells. Furthermore, gene expression analysis showed that when sensitive and resistant cells were treated with cisplatin, all resistance genes increased significantly relative to the control. In contrast to OCT4, MDR1, STAT3, and CD99 resistance genes were not significantly elevated in sensitive cells treated with PBPD compared to the control. Thus, the expression of resistance genes in resistant cells treated with PBPD was lower than cisplatin. Conclusions As a result, PBPD is a promising anticancer agent for CDDP-resistant ovarian cancer.
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Affiliation(s)
- Sariyeh Mohammadi Hadloo
- Department of Animal Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran.
| | | | - Ali Khanlarkhani
- Department of Nanotechnology and Advanced Materials, Materials and Energy Research Center, Karaj, Iran.
| | - Maryam Saeidifar
- Department of Nanotechnology and Advanced Materials, Materials and Energy Research Center, Karaj, Iran.
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5
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Faris A, Edder Y, Hdoufane I, Ait Lahcen I, Saadi M, El Ammari L, Berraho M, Cherqaoui D, Boualy B, Karim A. Syntheses, characterization and DFT studies of two new (π-allyl) palladium(II) complexes of β-8,9-dihydrohimachalene. J COORD CHEM 2023. [DOI: 10.1080/00958972.2023.2194013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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6
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Vinogradova EE, Alekseenko AL, Popkov SV, Kolotyrkina NG, Kravchenko AN, Gazieva GA. Synthesis and Evaluation on the Fungicidal Activity of S-Alkyl Substituted Thioglycolurils. Int J Mol Sci 2023; 24:ijms24065756. [PMID: 36982829 PMCID: PMC10051383 DOI: 10.3390/ijms24065756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 03/13/2023] [Accepted: 03/15/2023] [Indexed: 03/19/2023] Open
Abstract
A series of S-alkyl substituted thioglycolurils was prepared through the alkylation of corresponding thioglycolurils with halogenoalkanes and tested for their fungicidal activity against six phytopathogenic fungi from different taxonomic classes: Venturia inaequalis, Rhizoctonia solani, Fusarium oxysporum, Fusarium moniliforme, Bipolaris sorokiniana, and Sclerotinia sclerotiorum, and two pathogenic yeasts: Candida albicans and Cryptococcus neoformans var. grubii. A number of S-alkyl substituted thioglycolurils exhibited high activity against Venturia inaequalis and Rhizoctonia solani (85–100% mycelium growth inhibition), and moderate activity against other phytopathogens. S-Ethyl substituted thioglycolurils possessed a high activity against Candida albicans. Additionally, the hemolytic and cytotoxic properties of promising derivatives were determined using human red blood cells and human embryonic kidney cells, respectively. Two S-ethyl derivatives possessed both low cytotoxicity against normal human cells and high fungicidal activity against Candida albicans.
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Affiliation(s)
- Ekaterina E. Vinogradova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russia
| | - Anna L. Alekseenko
- Faculty of Chemical-Pharmaceutical Technologies and Biomedical Preparations, Mendeleev University of Chemical Technology, 9 Miusskaya Sq., Moscow 125047, Russia
| | - Sergey V. Popkov
- Faculty of Chemical-Pharmaceutical Technologies and Biomedical Preparations, Mendeleev University of Chemical Technology, 9 Miusskaya Sq., Moscow 125047, Russia
| | - Natalya G. Kolotyrkina
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russia
| | - Angelina N. Kravchenko
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russia
| | - Galina A. Gazieva
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russia
- Correspondence:
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7
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Mansour AM, Shehab OR. Triazolato Pd(II) and Pt(II) complexes of 2,6-bis(1-ethylbenzimidazol-2'-yl)pyridine formed via catalyst-free [3+2] click reactions. Inorganica Chim Acta 2023. [DOI: 10.1016/j.ica.2023.121379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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8
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Physicochemical properties, crystal structures, antibacterial properties and in silico characterization of cobalt and copper metal complexes and their acido complex crystals with 4-chloromethylpyridine. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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9
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Frei A, Elliott AG, Kan A, Dinh H, Bräse S, Bruce AE, Bruce MR, Chen F, Humaidy D, Jung N, King AP, Lye PG, Maliszewska HK, Mansour AM, Matiadis D, Muñoz MP, Pai TY, Pokhrel S, Sadler PJ, Sagnou M, Taylor M, Wilson JJ, Woods D, Zuegg J, Meyer W, Cain AK, Cooper MA, Blaskovich MAT. Metal Complexes as Antifungals? From a Crowd-Sourced Compound Library to the First In Vivo Experiments. JACS AU 2022; 2:2277-2294. [PMID: 36311838 PMCID: PMC9597602 DOI: 10.1021/jacsau.2c00308] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 07/01/2022] [Accepted: 07/27/2022] [Indexed: 06/16/2023]
Abstract
There are currently fewer than 10 antifungal drugs in clinical development, but new fungal strains that are resistant to most current antifungals are spreading rapidly across the world. To prevent a second resistance crisis, new classes of antifungal drugs are urgently needed. Metal complexes have proven to be promising candidates for novel antibiotics, but so far, few compounds have been explored for their potential application as antifungal agents. In this work, we report the evaluation of 1039 metal-containing compounds that were screened by the Community for Open Antimicrobial Drug Discovery (CO-ADD). We show that 20.9% of all metal compounds tested have antimicrobial activity against two representative Candida and Cryptococcus strains compared with only 1.1% of the >300,000 purely organic molecules tested through CO-ADD. We identified 90 metal compounds (8.7%) that show antifungal activity while not displaying any cytotoxicity against mammalian cell lines or hemolytic properties at similar concentrations. The structures of 21 metal complexes that display high antifungal activity (MIC ≤1.25 μM) are discussed and evaluated further against a broad panel of yeasts. Most of these have not been previously tested for antifungal activity. Eleven of these metal complexes were tested for toxicity in the Galleria mellonella moth larva model, revealing that only one compound showed signs of toxicity at the highest injected concentration. Lastly, we demonstrated that the organo-Pt(II) cyclooctadiene complex Pt1 significantly reduces fungal load in an in vivo G. mellonella infection model. These findings showcase that the structural and chemical diversity of metal-based compounds can be an invaluable tool in the development of new drugs against infectious diseases.
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Affiliation(s)
- Angelo Frei
- Centre
for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland4072, Australia
- Department
of Chemistry, Biochemistry & Pharmaceutical Sciences, University of Bern, Freiestrasse 3, 3012Bern, Switzerland
| | - Alysha G. Elliott
- Centre
for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland4072, Australia
| | - Alex Kan
- Molecular
Mycology Research Laboratory, Centre for Infectious Diseases and Microbiology,
Faculty of Medicine and Health, Sydney Medical School, Westmead Clinical
School, Sydney Institute for Infectious Diseases, Westmead Hospital-Research
and Education Network, Westmead Institute for Medical Research, University of Sydney, Sydney, NSW2145, Australia
| | - Hue Dinh
- School
of Natural Sciences, ARC Centre of Excellence in Synthetic Biology, Macquarie University, Sydney, NSW2109, Australia
| | - Stefan Bräse
- Institute
of Organic Chemistry, Karlsruhe Institute
of Technology, Fritz-Haber-Weg 6, 76131Karlsruhe, Germany
- Institute
of Biological and Chemical Systems - Functional Molecular Systems, Karlsruhe Institute of Technology, 76344Eggenstein-Leopoldshafen, Germany
| | - Alice E. Bruce
- Department
of Chemistry, University of Maine, Orono, Maine04469, United States
| | - Mitchell R. Bruce
- Department
of Chemistry, University of Maine, Orono, Maine04469, United States
| | - Feng Chen
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, CoventryCV4 7AL, U.K.
| | - Dhirgam Humaidy
- Department
of Chemistry, University of Maine, Orono, Maine04469, United States
| | - Nicole Jung
- Karlsruhe
Nano Micro Facility (KNMF), Karlsruhe Institute
of Technology, Hermann-von-Helmholtz-Platz 1, 76344Eggenstein-Leopoldshafen, Germany
- Institute
of Biological and Chemical Systems - Functional Molecular Systems, Karlsruhe Institute of Technology, 76344Eggenstein-Leopoldshafen, Germany
| | - A. Paden King
- Department
of Chemistry and Chemical Biology, Cornell
University, Ithaca, New York14853, United States
| | - Peter G. Lye
- School
of Science and Technology, University of
New England, Armidale, NSW2351, Australia
| | - Hanna K. Maliszewska
- School
of Chemistry, University of East Anglia, Norwich Research Park, NorwichNR4 7TJ, U.K.
| | - Ahmed M. Mansour
- Chemistry
Department, Faculty of Science, Cairo University, Giza12613, Egypt
| | - Dimitris Matiadis
- Institute
of Biosciences & Applications, National
Centre for Scientific Research “Demokritos”, 15310Athens, Greece
| | - María Paz Muñoz
- School
of Chemistry, University of East Anglia, Norwich Research Park, NorwichNR4 7TJ, U.K.
| | - Tsung-Yu Pai
- Molecular
Mycology Research Laboratory, Centre for Infectious Diseases and Microbiology,
Faculty of Medicine and Health, Sydney Medical School, Westmead Clinical
School, Sydney Institute for Infectious Diseases, Westmead Hospital-Research
and Education Network, Westmead Institute for Medical Research, University of Sydney, Sydney, NSW2145, Australia
| | - Shyam Pokhrel
- Department
of Chemistry, University of Maine, Orono, Maine04469, United States
| | - Peter J. Sadler
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, CoventryCV4 7AL, U.K.
| | - Marina Sagnou
- Institute
of Biosciences & Applications, National
Centre for Scientific Research “Demokritos”, 15310Athens, Greece
| | - Michelle Taylor
- School
of Science and Technology, University of
New England, Armidale, NSW2351, Australia
| | - Justin J. Wilson
- Department
of Chemistry and Chemical Biology, Cornell
University, Ithaca, New York14853, United States
| | - Dean Woods
- School
of Science and Technology, University of
New England, Armidale, NSW2351, Australia
| | - Johannes Zuegg
- Centre
for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland4072, Australia
| | - Wieland Meyer
- Molecular
Mycology Research Laboratory, Centre for Infectious Diseases and Microbiology,
Faculty of Medicine and Health, Sydney Medical School, Westmead Clinical
School, Sydney Institute for Infectious Diseases, Westmead Hospital-Research
and Education Network, Westmead Institute for Medical Research, University of Sydney, Sydney, NSW2145, Australia
| | - Amy K. Cain
- School
of Natural Sciences, ARC Centre of Excellence in Synthetic Biology, Macquarie University, Sydney, NSW2109, Australia
| | - Matthew A. Cooper
- Centre
for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland4072, Australia
| | - Mark A. T. Blaskovich
- Centre
for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland4072, Australia
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Antibacterial activity and molecular studies of non-symmetric POCOP-Pd(II) pincer complexes derived from 2,4-dihydroxybenzaldehyde (2,4-DHBA). Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Mansour AM, Radacki K, Shehab OR. Role of the ancillary ligand in determining the antimicrobial activity of Pd(II) complexes with N^N^N-tridentate Coligand. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115857] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Hassan EA, Zayed SE, Mahdy AHS, Abo-Bakr AM. An efficient protocol for the synthesis of new camphor pyrimidine and camphor thiazole derivatives using conventional and microwave irradiation techniques and in vitro evaluation as potential antimicrobial agents. Curr Org Synth 2022; 19:COS-EPUB-119939. [PMID: 34983349 DOI: 10.2174/1570179419666220104125340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 10/21/2021] [Accepted: 11/03/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND A series of new pyrimidines and thiazoles containing camphor moiety were synthesized under both conventional and microwave irradiation techniques. METHODS The condensation of camphor either with aminoguanidine or thiosemicarbazide gives the camphor hydrazine carboximidiamide 2 and the camphor thiosemicarbazone 3, respectively. Refluxing of 3 with chloroacetonitrile afforded the camphor thiazol-4-imine 4. Compounds 2 and 4 were used as precursors for the synthesis of target products. RESULTS The reaction of 2 with different species such as arylidene malononitrile, acetylacetone, and ethyl acetoacetate gave the corresponding camphor pyrimidine derivatives 5a,b-7 while refluxing of compound 4 with different reagents e.g. aldehydes, isatin, ninhydrin, acetic anhydride, benzene sulphonyl chloride, and p-nitro-benzoyl chloride afforded the camphor thiazole derivatives 8a-d-13, respectively. CONCLUSION A comparison between the conventional way and the eco-friendly microwave irradiation method occurred in the synthesis of the same compounds, which the latter was more efficient. The elemental analysis, FT-IR, 1H NMR, 13C NMR, and Mass spectra confirm the structures of the obtained new compounds. The potential use of some selected derivatives as antimicrobial agents was investigated and gave promising results.
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Affiliation(s)
- Entesar A Hassan
- Chemistry Department, Faculty of Science, South Valley University, Qena, 83523 Egypt
| | - Salem E Zayed
- Chemistry Department, Faculty of Science, South Valley University, Qena, 83523 Egypt
| | - Al-Hassan S Mahdy
- Chemistry Department, Faculty of Science, South Valley University, Qena, 83523 Egypt
| | - Ahmed M Abo-Bakr
- Chemistry Department, Faculty of Science, South Valley University, Qena, 83523 Egypt
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13
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Mansour AM. Pd(ii) and Pt(ii) complexes of tridentate ligands with selective toxicity against Cryptococcus neoformans and Candida albicans. RSC Adv 2021; 11:39748-39757. [PMID: 35494132 PMCID: PMC9044551 DOI: 10.1039/d1ra06559a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 11/22/2021] [Indexed: 12/21/2022] Open
Abstract
Novel Pd(ii) and Pt(ii) complexes of the tridentate 2,6-bis(1-ethyl-benzimidazol-2'-yl)pyridine (LBZ), and 4'-(2-pyridyl)-2,2':6',2''-terpyridine (LPY) ligands were synthesized, characterized using a variety of analytical and spectroscopic tools, and screened for their potential antimicrobial properties against some bacterial and fungal strains as well as cytotoxicity against healthy human embryonic kidney (HEK293) cells. The electronic structures of the complexes were investigated by time-dependent density functional theory calculations. The free ligand LPY and benzimidazole complexes exhibited selective toxicity against Cryptococcus neoformans and Candida albicans, while displaying no cytotoxicity against HEK293. In the case of Cryptococcus neoformans, the antifungal activities of the benzimidazole-based complexes (MIC = 1.58-2.62 μM) are higher than those of the reference drug fluconazole (26.1 μM).
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Affiliation(s)
- Ahmed M Mansour
- Department of Chemistry, Faculty of Science, Cairo University Gamma Street Giza Cairo 12613 Egypt
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14
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Zalevskaya O, Gur'eva Y, Kutchin A, Aleksandrova Y, Yandulova E, Nikolaeva N, Neganova M. Palladium complexes with terpene derivatives of ethylenediamine and benzylamine: Synthesis and study of antitumor properties. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120593] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Frei A, King AP, Lowe GJ, Cain AK, Short FL, Dinh H, Elliott AG, Zuegg J, Wilson JJ, Blaskovich MAT. Nontoxic Cobalt(III) Schiff Base Complexes with Broad-Spectrum Antifungal Activity. Chemistry 2021; 27:2021-2029. [PMID: 33231906 PMCID: PMC7855930 DOI: 10.1002/chem.202003545] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/03/2020] [Indexed: 12/21/2022]
Abstract
Resistance to currently available antifungal drugs has quietly been on the rise but overshadowed by the alarming spread of antibacterial resistance. There is a striking lack of attention to the threat of drug-resistant fungal infections, with only a handful of new drugs currently in development. Given that metal complexes have proven to be useful new chemotypes in the fight against diseases such as cancer, malaria, and bacterial infections, it is reasonable to explore their possible utility in treating fungal infections. Herein we report a series of cobalt(III) Schiff base complexes with broad-spectrum antifungal activity. Some of these complexes show minimum inhibitory concentrations (MIC) in the low micro- to nanomolar range against a series of Candida and Cryptococcus yeasts. Additionally, we demonstrate that these compounds show no cytotoxicity against both bacterial and human cells. Finally, we report the first in vivo toxicity data on these compounds in Galleria mellonella, showing that doses as high as 266 mg kg-1 are tolerated without adverse effects, paving the way for further in vivo studies of these complexes.
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Affiliation(s)
- Angelo Frei
- Centre for Superbug SolutionsInstitute for Molecular BioscienceThe University of QueenslandSt. LuciaQLD4072Australia
| | - A. Paden King
- Department of Chemistry and Chemical BiologyCornell UniversityIthacaNY14853USA
| | - Gabrielle J. Lowe
- Centre for Superbug SolutionsInstitute for Molecular BioscienceThe University of QueenslandSt. LuciaQLD4072Australia
| | - Amy K. Cain
- Department of Molecular SciencesMacquarie UniversitySydneyNSW2109Australia
| | - Francesca L. Short
- Department of Molecular SciencesMacquarie UniversitySydneyNSW2109Australia
| | - Hue Dinh
- Department of Molecular SciencesMacquarie UniversitySydneyNSW2109Australia
- Department of Biological SciencesMacquarie UniversitySydneyNSW2109Australia
| | - Alysha G. Elliott
- Centre for Superbug SolutionsInstitute for Molecular BioscienceThe University of QueenslandSt. LuciaQLD4072Australia
| | - Johannes Zuegg
- Centre for Superbug SolutionsInstitute for Molecular BioscienceThe University of QueenslandSt. LuciaQLD4072Australia
| | - Justin J. Wilson
- Department of Chemistry and Chemical BiologyCornell UniversityIthacaNY14853USA
| | - Mark A. T. Blaskovich
- Centre for Superbug SolutionsInstitute for Molecular BioscienceThe University of QueenslandSt. LuciaQLD4072Australia
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