1
|
Affiliation(s)
- Ronald L. Reyes
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Tomohiro Iwai
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Masaya Sawamura
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| |
Collapse
|
2
|
Cairns AG, Vazquez-Romero A, Mahdi Moein M, Ådén J, Elmore CS, Takano A, Arakawa R, Varrone A, Almqvist F, Schou M. Increased Brain Exposure of an Alpha-Synuclein Fibrillization Modulator by Utilization of an Activated Ester Prodrug Strategy. ACS Chem Neurosci 2018; 9:2542-2547. [PMID: 29901990 DOI: 10.1021/acschemneuro.8b00236] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Previous work in our laboratories has identified a series of peptidomimetic 2-pyridone molecules as modulators of alpha-synuclein (α-syn) fibrillization in vitro. As a first step toward developing molecules from this scaffold as positron emission tomography imaging agents, we were interested in evaluating their blood-brain barrier permeability in nonhuman primates (NHP) in vivo. For this purpose, 2-pyridone 12 was prepared and found to accelerate α-syn fibrillization in vitro. Acid 12, and its acetoxymethyl ester analogue 14, were then radiolabeled with 11C ( t1/2 = 20.4 min) at high radiochemical purity (>99%) and high specific radioactivity (>37 GBq/μmol). Following intravenous injection of each compound in NHP, a 4-fold higher radioactivity in brain was observed for [11C]14 compared to [11C]12 (0.8 vs 0.2 SUV, respectively). [11C]14 was rapidly eliminated from plasma, with [11C]12 as the major metabolic product observed by radio-HPLC. The presented prodrug approach paves the way for future development of 2-pyridones as imaging biomarkers for in vivo imaging of α-synuclein deposits in brain.
Collapse
Affiliation(s)
| | - Ana Vazquez-Romero
- Department of Clinical Neuroscience, Center for Psychiatry Research, Karolinska Institutet and Stockholm County Council, SE-171 76 Stockholm, Sweden
| | - Mohammad Mahdi Moein
- Department of Clinical Neuroscience, Center for Psychiatry Research, Karolinska Institutet and Stockholm County Council, SE-171 76 Stockholm, Sweden
| | - Jörgen Ådén
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden
| | - Charles S. Elmore
- Isotope Chemistry, Pharmaceutical Sciences, IMED Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | - Akihiro Takano
- Department of Clinical Neuroscience, Center for Psychiatry Research, Karolinska Institutet and Stockholm County Council, SE-171 76 Stockholm, Sweden
| | - Ryosuke Arakawa
- Department of Clinical Neuroscience, Center for Psychiatry Research, Karolinska Institutet and Stockholm County Council, SE-171 76 Stockholm, Sweden
| | - Andrea Varrone
- Department of Clinical Neuroscience, Center for Psychiatry Research, Karolinska Institutet and Stockholm County Council, SE-171 76 Stockholm, Sweden
| | | | - Magnus Schou
- Department of Clinical Neuroscience, Center for Psychiatry Research, Karolinska Institutet and Stockholm County Council, SE-171 76 Stockholm, Sweden
- PET Science Centre, Precision Medicine and Genomics, IMED Biotech Unit, AstraZeneca, Karolinska Institutet, S-171 76 Stockholm, Sweden
| |
Collapse
|
3
|
Kulén M, Lindgren M, Hansen S, Cairns AG, Grundström C, Begum A, van der Lingen I, Brännström K, Hall M, Sauer UH, Johansson J, Sauer-Eriksson AE, Almqvist F. Structure-Based Design of Inhibitors Targeting PrfA, the Master Virulence Regulator of Listeria monocytogenes. J Med Chem 2018; 61:4165-4175. [PMID: 29667825 DOI: 10.1021/acs.jmedchem.8b00289] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Listeria monocytogenes is a bacterial pathogen that controls much of its virulence through the transcriptional regulator PrfA. In this study, we describe structure-guided design and synthesis of a set of PrfA inhibitors based on ring-fused 2-pyridone heterocycles. Our most effective compound decreased virulence factor expression, reduced bacterial uptake into eukaryotic cells, and improved survival of chicken embryos infected with L. monocytogenes compared to previously identified compounds. Crystal structures identified an intraprotein "tunnel" as the main inhibitor binding site (AI), where the compounds participate in an extensive hydrophobic network that restricts the protein's ability to form functional DNA-binding helix-turn-helix (HTH) motifs. Our studies also revealed a hitherto unsuspected structural plasticity of the HTH motif. In conclusion, we have designed 2-pyridone analogues that function as site-AI selective PrfA inhibitors with potent antivirulence properties.
Collapse
|
4
|
Good JAD, Andersson C, Hansen S, Wall J, Krishnan KS, Begum A, Grundström C, Niemiec MS, Vaitkevicius K, Chorell E, Wittung-Stafshede P, Sauer UH, Sauer-Eriksson AE, Almqvist F, Johansson J. Attenuating Listeria monocytogenes Virulence by Targeting the Regulatory Protein PrfA. Cell Chem Biol 2016; 23:404-14. [PMID: 26991105 PMCID: PMC4802734 DOI: 10.1016/j.chembiol.2016.02.013] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 01/27/2016] [Accepted: 02/19/2016] [Indexed: 01/28/2023]
Abstract
The transcriptional activator PrfA, a member of the Crp/Fnr family, controls the expression of some key virulence factors necessary for infection by the human bacterial pathogen Listeria monocytogenes. Phenotypic screening identified ring-fused 2-pyridone molecules that at low micromolar concentrations attenuate L. monocytogenes cellular uptake by reducing the expression of virulence genes. These inhibitors bind the transcriptional regulator PrfA and decrease its affinity for the consensus DNA-binding site. Structural characterization of this interaction revealed that one of the ring-fused 2-pyridones, compound 1, binds at two separate sites on the protein: one within a hydrophobic pocket or tunnel, located between the C- and N-terminal domains of PrfA, and the second in the vicinity of the DNA-binding helix-turn-helix motif. At both sites the compound interacts with residues important for PrfA activation and helix-turn-helix formation. Ring-fused 2-pyridones represent a new class of chemical probes for studying virulence in L. monocytogenes. Inhibitors of L. monocytogenes infectivity reduce virulence gene expression Binding of inhibitor to the PrfA regulator reduces affinity for its DNA motif First crystal structure of a Crp family regulator with an inhibitor Provides rationale for screening with Crp family transcriptional regulators
Collapse
Affiliation(s)
- James A D Good
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden; Umeå Centre for Microbial Research (UCMR), Umeå University, 901 87 Umeå, Sweden
| | - Christopher Andersson
- Umeå Centre for Microbial Research (UCMR), Umeå University, 901 87 Umeå, Sweden; Department of Molecular Biology, Umeå University, 901 87 Umeå, Sweden; Molecular Infection Medicine, Sweden (MIMS), Umeå University, 901 87 Umeå, Sweden
| | - Sabine Hansen
- Umeå Centre for Microbial Research (UCMR), Umeå University, 901 87 Umeå, Sweden; Department of Molecular Biology, Umeå University, 901 87 Umeå, Sweden; Molecular Infection Medicine, Sweden (MIMS), Umeå University, 901 87 Umeå, Sweden
| | - Jessica Wall
- Umeå Centre for Microbial Research (UCMR), Umeå University, 901 87 Umeå, Sweden; Department of Molecular Biology, Umeå University, 901 87 Umeå, Sweden; Molecular Infection Medicine, Sweden (MIMS), Umeå University, 901 87 Umeå, Sweden
| | - K Syam Krishnan
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden; Umeå Centre for Microbial Research (UCMR), Umeå University, 901 87 Umeå, Sweden
| | - Afshan Begum
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden; Umeå Centre for Microbial Research (UCMR), Umeå University, 901 87 Umeå, Sweden
| | - Christin Grundström
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden; Umeå Centre for Microbial Research (UCMR), Umeå University, 901 87 Umeå, Sweden
| | | | - Karolis Vaitkevicius
- Umeå Centre for Microbial Research (UCMR), Umeå University, 901 87 Umeå, Sweden; Department of Molecular Biology, Umeå University, 901 87 Umeå, Sweden; Molecular Infection Medicine, Sweden (MIMS), Umeå University, 901 87 Umeå, Sweden
| | - Erik Chorell
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden; Umeå Centre for Microbial Research (UCMR), Umeå University, 901 87 Umeå, Sweden
| | | | - Uwe H Sauer
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden; Umeå Centre for Microbial Research (UCMR), Umeå University, 901 87 Umeå, Sweden
| | - A Elisabeth Sauer-Eriksson
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden; Umeå Centre for Microbial Research (UCMR), Umeå University, 901 87 Umeå, Sweden.
| | - Fredrik Almqvist
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden; Umeå Centre for Microbial Research (UCMR), Umeå University, 901 87 Umeå, Sweden.
| | - Jörgen Johansson
- Umeå Centre for Microbial Research (UCMR), Umeå University, 901 87 Umeå, Sweden; Department of Molecular Biology, Umeå University, 901 87 Umeå, Sweden; Molecular Infection Medicine, Sweden (MIMS), Umeå University, 901 87 Umeå, Sweden.
| |
Collapse
|
5
|
Diaz Ropero BPF, Elsegood MRJ, Fairley G, Pritchard GJ, Weaver GW. Pyridone Functionalization: Regioselective Deprotonation of 6-Methylpyridin-2(1H)- and -4(1H)-one Derivatives. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601156] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | | | - Gary Fairley
- Darwin Building (310), Cambridge Science Park; AstraZeneca R&D
- Oncology iMed; Milton Road CB4 0WG Cambridge UK
| | | | - George W. Weaver
- Department of Chemistry; Loughborough University; LE11 3TU Loughborough UK
| |
Collapse
|
6
|
Peptidomimetic Small Molecules Disrupt Type IV Secretion System Activity in Diverse Bacterial Pathogens. mBio 2016; 7:e00221-16. [PMID: 27118587 PMCID: PMC4850256 DOI: 10.1128/mbio.00221-16] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Bacteria utilize complex type IV secretion systems (T4SSs) to translocate diverse effector proteins or DNA into target cells. Despite the importance of T4SSs in bacterial pathogenesis, the mechanism by which these translocation machineries deliver cargo across the bacterial envelope remains poorly understood, and very few studies have investigated the use of synthetic molecules to disrupt T4SS-mediated transport. Here, we describe two synthetic small molecules (C10 and KSK85) that disrupt T4SS-dependent processes in multiple bacterial pathogens. Helicobacter pylori exploits a pilus appendage associated with the cag T4SS to inject an oncogenic effector protein (CagA) and peptidoglycan into gastric epithelial cells. In H. pylori, KSK85 impedes biogenesis of the pilus appendage associated with the cag T4SS, while C10 disrupts cag T4SS activity without perturbing pilus assembly. In addition to the effects in H. pylori, we demonstrate that these compounds disrupt interbacterial DNA transfer by conjugative T4SSs in Escherichia coli and impede vir T4SS-mediated DNA delivery by Agrobacterium tumefaciens in a plant model of infection. Of note, C10 effectively disarmed dissemination of a derepressed IncF plasmid into a recipient bacterial population, thus demonstrating the potential of these compounds in mitigating the spread of antibiotic resistance determinants driven by conjugation. To our knowledge, this study is the first report of synthetic small molecules that impair delivery of both effector protein and DNA cargos by diverse T4SSs. Many human and plant pathogens utilize complex nanomachines called type IV secretion systems (T4SSs) to transport proteins and DNA to target cells. In addition to delivery of harmful effector proteins into target cells, T4SSs can disseminate genetic determinants that confer antibiotic resistance among bacterial populations. In this study, we sought to identify compounds that disrupt T4SS-mediated processes. Using the human gastric pathogen H. pylori as a model system, we identified and characterized two small molecules that prevent transfer of an oncogenic effector protein to host cells. We discovered that these small molecules also prevented the spread of antibiotic resistance plasmids in E. coli populations and diminished the transfer of tumor-inducing DNA from the plant pathogen A. tumefaciens to target cells. Thus, these compounds are versatile molecular tools that can be used to study and disarm these important bacterial machines.
Collapse
|
7
|
Good JAD, Silver J, Núñez-Otero C, Bahnan W, Krishnan KS, Salin O, Engström P, Svensson R, Artursson P, Gylfe Å, Bergström S, Almqvist F. Thiazolino 2-Pyridone Amide Inhibitors of Chlamydia trachomatis Infectivity. J Med Chem 2016; 59:2094-108. [PMID: 26849778 DOI: 10.1021/acs.jmedchem.5b01759] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The bacterial pathogen Chlamydia trachomatis is a global health burden currently treated with broad-spectrum antibiotics which disrupt commensal bacteria. We recently identified a compound through phenotypic screening that blocked infectivity of this intracellular pathogen without host cell toxicity (compound 1, KSK 120). Herein, we present the optimization of 1 to a class of thiazolino 2-pyridone amides that are highly efficacious (EC50 ≤ 100 nM) in attenuating infectivity across multiple serovars of C. trachomatis without host cell toxicity. The lead compound 21a exhibits reduced lipophilicity versus 1 and did not affect the growth or viability of representative commensal flora at 50 μM. In microscopy studies, a highly active fluorescent analogue 37 localized inside the parasitiphorous inclusion, indicative of a specific targeting of bacterial components. In summary, we present a class of small molecules to enable the development of specific treatments for C. trachomatis.
Collapse
Affiliation(s)
- James A D Good
- Department of Chemistry, Umeå University , 901 87 Umeå, Sweden.,Umeå Centre for Microbial Research, Umeå University , 901 87 Umeå, Sweden
| | - Jim Silver
- Umeå Centre for Microbial Research, Umeå University , 901 87 Umeå, Sweden.,Department of Molecular Biology, Umeå University , 901 87 Umeå, Sweden.,Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå University , 901 87 Umeå, Sweden
| | - Carlos Núñez-Otero
- Department of Clinical Microbiology, Umeå University , 901 85 Umeå, Sweden
| | - Wael Bahnan
- Umeå Centre for Microbial Research, Umeå University , 901 87 Umeå, Sweden.,Department of Molecular Biology, Umeå University , 901 87 Umeå, Sweden.,Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå University , 901 87 Umeå, Sweden
| | - K Syam Krishnan
- Department of Chemistry, Umeå University , 901 87 Umeå, Sweden.,Umeå Centre for Microbial Research, Umeå University , 901 87 Umeå, Sweden
| | - Olli Salin
- Umeå Centre for Microbial Research, Umeå University , 901 87 Umeå, Sweden.,Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå University , 901 87 Umeå, Sweden.,Department of Clinical Microbiology, Umeå University , 901 85 Umeå, Sweden
| | - Patrik Engström
- Umeå Centre for Microbial Research, Umeå University , 901 87 Umeå, Sweden.,Department of Molecular Biology, Umeå University , 901 87 Umeå, Sweden.,Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå University , 901 87 Umeå, Sweden
| | - Richard Svensson
- Department of Pharmacy, Uppsala University , SE-751 23 Uppsala, Sweden.,The Uppsala University Drug Optimization and Pharmaceutical Profiling Platform, Chemical Biology Consortium Sweden, Uppsala University , SE-751 23 Uppsala, Sweden
| | - Per Artursson
- Department of Pharmacy, Uppsala University , SE-751 23 Uppsala, Sweden.,The Uppsala University Drug Optimization and Pharmaceutical Profiling Platform, Chemical Biology Consortium Sweden, Uppsala University , SE-751 23 Uppsala, Sweden
| | - Åsa Gylfe
- Umeå Centre for Microbial Research, Umeå University , 901 87 Umeå, Sweden.,Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå University , 901 87 Umeå, Sweden.,Department of Clinical Microbiology, Umeå University , 901 85 Umeå, Sweden
| | - Sven Bergström
- Umeå Centre for Microbial Research, Umeå University , 901 87 Umeå, Sweden.,Department of Molecular Biology, Umeå University , 901 87 Umeå, Sweden.,Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå University , 901 87 Umeå, Sweden
| | - Fredrik Almqvist
- Department of Chemistry, Umeå University , 901 87 Umeå, Sweden.,Umeå Centre for Microbial Research, Umeå University , 901 87 Umeå, Sweden
| |
Collapse
|
8
|
Lepitre T, Pintiala C, Muru K, Comesse S, Rebbaa A, Lawson AM, Daïch A. Competitive intramolecular C–C vs. C–O bond coupling reactions toward C6 ring-fused 2-pyridone synthesis. Org Biomol Chem 2016; 14:3564-73. [DOI: 10.1039/c6ob00303f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work described a competitive C–C vs. C–O bond forming reaction at the challenging C6-position of 2-pyridones through Pd catalysis and silver radical cyclization.
Collapse
Affiliation(s)
- T. Lepitre
- Laboratoire de Chimie
- URCOM
- EA 3221
- INC3M CNRS FR-3038
- Normandie Université (Université du Havre)
| | - C. Pintiala
- Laboratoire de Chimie
- URCOM
- EA 3221
- INC3M CNRS FR-3038
- Normandie Université (Université du Havre)
| | - K. Muru
- Laboratoire de Chimie
- URCOM
- EA 3221
- INC3M CNRS FR-3038
- Normandie Université (Université du Havre)
| | - S. Comesse
- Laboratoire de Chimie
- URCOM
- EA 3221
- INC3M CNRS FR-3038
- Normandie Université (Université du Havre)
| | - A. Rebbaa
- Department of Pathology
- University of Pittsburgh
- Children's Hospital of Pittsburgh of UPMC
- Pittsburgh
- USA
| | - A. M. Lawson
- Laboratoire de Chimie
- URCOM
- EA 3221
- INC3M CNRS FR-3038
- Normandie Université (Université du Havre)
| | - A. Daïch
- Laboratoire de Chimie
- URCOM
- EA 3221
- INC3M CNRS FR-3038
- Normandie Université (Université du Havre)
| |
Collapse
|
9
|
Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2012. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2014.02.026] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|