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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: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [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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Lamb DW, Boerkamp M, Lye PG. Guided-mode refraction model for optical fiber sensing of surface crystal growth. Opt Lett 2010; 35:3625-3627. [PMID: 21042371 DOI: 10.1364/ol.35.003625] [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] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
An empirical "guided-mode refraction model" has been invoked to explain the optical attenuation of radiation in an exposed core optical fiber sensor subject to heterogeneous (surface) crystal growth. Based on Fresnel reflectance values at the internal fiber-crystal and crystal-solution interfaces, the model predictions agree with experimental observations of radial loss of radiation from the fiber core through the crystals as well as attenuation of guided radiation as a function of the radiation launch angle into the fiber.
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Affiliation(s)
- David W Lamb
- Physics & Electronics, School of Science & Technology, University of New England, Armidale, New South Wales, Australia, 2351.
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Boerkamp M, Lamb DW, Lye PG, Fellows CM, Al-Hamzah A, Wallace AD. Detecting and Monitoring Industrial Scale Formation Using an Intrinsic Exposed-Core Optical Fiber Sensor. Ind Eng Chem Res 2010. [DOI: 10.1021/ie901471p] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [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)
- Martijn Boerkamp
- School of Science & Technology, University of New England, Armidale, NSW 2351, Australia
| | - David W. Lamb
- School of Science & Technology, University of New England, Armidale, NSW 2351, Australia
| | - Peter G. Lye
- School of Science & Technology, University of New England, Armidale, NSW 2351, Australia
| | - Christopher M. Fellows
- School of Science & Technology, University of New England, Armidale, NSW 2351, Australia
| | - Ali Al-Hamzah
- School of Science & Technology, University of New England, Armidale, NSW 2351, Australia
| | - Andrew D. Wallace
- School of Science & Technology, University of New England, Armidale, NSW 2351, Australia
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Wallace AD, Boerkamp M, Lye PG, Lamb DW, Doherty WOS, Fellows CM. Assessment of an Intrinsic Optical Fiber Sensor for in Situ Monitoring of Scale-Forming Salts. Ind Eng Chem Res 2008. [DOI: 10.1021/ie070872a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrew D. Wallace
- School of Science and Technology, University of New England, Armidale, NSW 2351, Australia, and Sugar Research and Innovation, Queensland University of Technology, Q 4001, Australia
| | - Martijn Boerkamp
- School of Science and Technology, University of New England, Armidale, NSW 2351, Australia, and Sugar Research and Innovation, Queensland University of Technology, Q 4001, Australia
| | - Peter G. Lye
- School of Science and Technology, University of New England, Armidale, NSW 2351, Australia, and Sugar Research and Innovation, Queensland University of Technology, Q 4001, Australia
| | - David W. Lamb
- School of Science and Technology, University of New England, Armidale, NSW 2351, Australia, and Sugar Research and Innovation, Queensland University of Technology, Q 4001, Australia
| | - William O. S. Doherty
- School of Science and Technology, University of New England, Armidale, NSW 2351, Australia, and Sugar Research and Innovation, Queensland University of Technology, Q 4001, Australia
| | - Christopher M. Fellows
- School of Science and Technology, University of New England, Armidale, NSW 2351, Australia, and Sugar Research and Innovation, Queensland University of Technology, Q 4001, Australia
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Saudan C, Dunand FA, Abou-Hamdan A, Bugnon P, Lye PG, Lincoln SF, Merbach AE. A model for sequential threading of alpha-cyclodextrin onto a guest: a complete thermodynamic and kinetic study in water. J Am Chem Soc 2001; 123:10290-8. [PMID: 11603979 DOI: 10.1021/ja010946o] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first variable-temperature and variable-pressure stopped-flow spectrophotometric study of the sequential threading of alpha-cyclodextrin (alpha-CD) onto the guest dye Mordant Orange 10, S, is reported. Complementary (1)H one-dimensional (1D) variable-temperature kinetic studies and two-dimensional (2D) rotating-frame nuclear Overhauser effect spectroscopy (ROESY) and EXSY NMR studies are also reported. In aqueous solution at 298.2 K, the first alpha-CD threads onto S to form a 1:1 complex S.alpha-CD with a forward rate constant k(1,f) = 15 200 +/- 200 M(-1) s(-1) and dethreads with a reverse rate constant k(1,r) = 4.4 +/- 0.3 s(-1). Subsequently, S.alpha-CD isomerizes to S.alpha-CD (k(3,f) = 0.158 +/- 0.006 s(-1), k(3,f) = 0.148 +/- 0.006 s(-1)). This process can be viewed as a thermodynamically controlled molecular shuttle. A second alpha-CD threads onto S.alpha-CD to form a 1:2 complex, S.(alpha-CD)(2), with k(2,f) = 98 +/- 2 M(-1) s(-1) and k(2,r) = 0.032 +/- 0.002 s(-1). A second alpha-CD also threads onto S.alpha-CD to form another 1:2 complex, S.(alpha-CD)(2), characterized by k(4,f) = 9640 +/- 1800 M(-1) s(-1) and k(4,r) = 61 +/- 6 s(-1). Direct interconvertion between S.(alpha-CD)(2) and S.(alpha-CD)(2) was not detected; instead, they interconvert by dethreading the second alpha-CD and through the isomerization equilibrium between S.alpha-CD and S.alpha-CD. The reaction volumes, DeltaV(0), were found to be negative for the first three equilibria and positive for the fourth equilibrium. For the first three forward and reverse reactions, the volumes of activation are substantially more negative, indicating a compression of the transition state in comparison with the ground states. These data were used in conjunction with DeltaH, DeltaH degrees, DeltaS, and DeltaS degrees data to deduce the dominant mechanistic threading processes, which appear to be largely controlled by changes in hydration and van der Waals interactions, and possibly by conformational changes in both S and alpha-CD. The structure of the four complexes were deduced from (1)H 2D ROESY NMR studies.
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Affiliation(s)
- C Saudan
- Institut de Chimie Minérale et Analytique, Université de Lausanne, CH-1015 Lausanne, Switzerland
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Abou-Hamdan A, Bugnon P, Saudan C, Lye PG, Merbach AE. High-Pressure Studies as a Novel Approach in Determining Inclusion Mechanisms: Thermodynamics and Kinetics of the Host−Guest Interactions for α-Cyclodextrin Complexes. J Am Chem Soc 2000. [DOI: 10.1021/ja993139m] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.7] [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)
- Amira Abou-Hamdan
- Contribution from the Institut de Chimie Minérale et Analytique (ICMA), Université de Lausanne, Bâtiment de Chimie (BCH), CH-1015 Lausanne, Switzerland
| | - Pascal Bugnon
- Contribution from the Institut de Chimie Minérale et Analytique (ICMA), Université de Lausanne, Bâtiment de Chimie (BCH), CH-1015 Lausanne, Switzerland
| | - Christophe Saudan
- Contribution from the Institut de Chimie Minérale et Analytique (ICMA), Université de Lausanne, Bâtiment de Chimie (BCH), CH-1015 Lausanne, Switzerland
| | - Peter G. Lye
- Contribution from the Institut de Chimie Minérale et Analytique (ICMA), Université de Lausanne, Bâtiment de Chimie (BCH), CH-1015 Lausanne, Switzerland
| | - André E. Merbach
- Contribution from the Institut de Chimie Minérale et Analytique (ICMA), Université de Lausanne, Bâtiment de Chimie (BCH), CH-1015 Lausanne, Switzerland
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Cayemittes S, Poth T, Fernandez MJ, Lye PG, Becker M, Elias H, Merbach AE. Mechanistic Investigation on the Water Substitution in the η5-Organometallic Complexes Cp*Ir(H2O)32+ and Cp*Rh(H2O)32+. Inorg Chem 1999. [DOI: 10.1021/ic990364w] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sonia Cayemittes
- Institut de Chimie Minérale et Analytique, Université de Lausanne, BCH, CH-1015 Lausanne, Switzerland, and Institut für Anorganische Chemie, Technische Universität Darmstadt, Petersenstrasse 18, D-64287 Darmstadt, Germany
| | - Tilo Poth
- Institut de Chimie Minérale et Analytique, Université de Lausanne, BCH, CH-1015 Lausanne, Switzerland, and Institut für Anorganische Chemie, Technische Universität Darmstadt, Petersenstrasse 18, D-64287 Darmstadt, Germany
| | - Maria J. Fernandez
- Institut de Chimie Minérale et Analytique, Université de Lausanne, BCH, CH-1015 Lausanne, Switzerland, and Institut für Anorganische Chemie, Technische Universität Darmstadt, Petersenstrasse 18, D-64287 Darmstadt, Germany
| | - Peter G. Lye
- Institut de Chimie Minérale et Analytique, Université de Lausanne, BCH, CH-1015 Lausanne, Switzerland, and Institut für Anorganische Chemie, Technische Universität Darmstadt, Petersenstrasse 18, D-64287 Darmstadt, Germany
| | - Michael Becker
- Institut de Chimie Minérale et Analytique, Université de Lausanne, BCH, CH-1015 Lausanne, Switzerland, and Institut für Anorganische Chemie, Technische Universität Darmstadt, Petersenstrasse 18, D-64287 Darmstadt, Germany
| | - Horst Elias
- Institut de Chimie Minérale et Analytique, Université de Lausanne, BCH, CH-1015 Lausanne, Switzerland, and Institut für Anorganische Chemie, Technische Universität Darmstadt, Petersenstrasse 18, D-64287 Darmstadt, Germany
| | - André E. Merbach
- Institut de Chimie Minérale et Analytique, Université de Lausanne, BCH, CH-1015 Lausanne, Switzerland, and Institut für Anorganische Chemie, Technische Universität Darmstadt, Petersenstrasse 18, D-64287 Darmstadt, Germany
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Kissner R, Nauser T, Bugnon P, Lye PG, Koppenol WH. Formation and properties of peroxynitrite as studied by laser flash photolysis, high-pressure stopped-flow technique, and pulse radiolysis. Chem Res Toxicol 1997; 10:1285-92. [PMID: 9403183 DOI: 10.1021/tx970160x] [Citation(s) in RCA: 445] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Flash photolysis of alkaline peroxynitrite solutions results in the formation of nitrogen monoxide and superoxide. From the rate of recombination it is concluded that the rate constant of the reaction of nitrogen monoxide with superoxide is (1.9 +/- 0.2) x 10(10) M-1 s-1. The pKa of hydrogen oxoperoxonitrate is dependent on the medium. With the stopped-flow technique a value of 6.5 is found at millimolar phosphate concentrations, while at 0.5 M phosphate the value is 7.5. The kinetics of decay do not follow first-order kinetics when the pH is larger than the pKa, combined with a total peroxynitrite and peroxynitrous acid concentration that exceeds 0.1 mM. An adduct between ONOO- and ONOOH is formed with a stability constant of (1.0 +/- 0.1) x 10(4) M. The kinetics of the decay of hydrogen oxoperoxonitrate are not very pressure-dependent: from stopped-flow experiments up to 152 MPa, an activation volume of 1.7 +/- 1.0 cm3 mol-1 was calculated. This small value is not compatible with homolysis of the O-O bond to yield free nitrogen dioxide and the hydroxyl radical. Pulse radiolysis of alkaline peroxynitrite solutions indicates that the hydroxyl radical reacts with ONOO- to form [(HO)ONOO].- with a rate constant of 5.8 x 10(9) M-1 s-1. This radical absorbs with a maximum at 420 nm (epsilon = 1.8 x 10(3) M-1 cm-1) and decays by second-order kinetics, k = 3.4 x 10(6) M-1 s-1. Improvements to the biomimetic synthesis of peroxynitrite with solid potassium superoxide and gaseous nitrogen monoxide result in higher peroxynitrite to nitrite yields than in most other syntheses.
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Affiliation(s)
- R Kissner
- Laboratorium für Anorganische Chemie, Eidgenössische Technische Hochschule Zürich, Switzerland
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Bugnon P, Lye PG, Abou-Hamdan A, Merbach AE. High-Pressure Stopped-Flow Study of Inclusion Reactions with α-Cyclodextrin: Dynamic Aspects in Host-Guest Interactions. Chimia (Aarau) 1996. [DOI: 10.2533/chimia.1996.615] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The full volume and entropy profiles of the inclusion reaction between α-cyclodextrin and the guest molecules, ethylorange (1) and mordant yellow 7 (2), have been constructed from variable-pressure and -temperature stopped-flow kinetic experiments.
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Bugnon P, Lye PG, Abou-Hamdan A, Merbach AE. The first volume profile for a host–guest interaction: a variable pressure kinetic study of an inclusion reaction with α-cyclodextrin. Chem Commun (Camb) 1996. [DOI: 10.1039/cc9960002787] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lye PG, Lawrance GA, Maeder M, Skelton BW, Wen H, White AH. Selection of metal ions by geometric isomers of a polyamine macrocycle with pendant donors. ACTA ACUST UNITED AC 1994. [DOI: 10.1039/dt9940000793] [Citation(s) in RCA: 12] [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: 11/21/2022]
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