1
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Rouzban H, Bayat M, Hosseini H. Efficient regioselective five-component synthesis of novel thiazolo[3,2-a]pyridine carbohydrazides and oxazolo[3,2-a]pyridine carbohydrazides. Mol Divers 2022. [PMID: 35587848 DOI: 10.1007/s11030-022-10446-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 04/18/2022] [Indexed: 10/18/2022]
Abstract
Two new categories of fused pyridines include 2H-thiazolo[3,2-a]pyridine-6-carbohydrazides and 2H-oxazolo[3,2-a]pyridine-6-carbohydrazides have been successfully synthesized via five-component cascade reactions using 9-fluorenone, cyanoacetohydrazide, 1,1-bis(methylthio)-2-nitroethene, aromatic aldehydes and cysteamine hydrochloride or ethanol amine as starting materials. This new approach involves a subsequence of key steps: N,S-acetal or N,O-acetal formation, Knoevenagel condensation, Michael addition, tautomerization and N-cyclization. It also has some advantages, such as convenience of operation, tolerance of a wide diversity of functional groups, use of green solvent and ease of purification by washing the crude products with ethanol.
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2
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Shatsauskas AL, Zablotskii YА, Chernenko SА, Zheleznova TY, Shuvalov VY, Kostyuchenko AS, Fisyuk AS. Synthesis and photophysical properties of the products of the reaction of 5-methyl-7-phenyl[1,3]oxazolo[5,4-b]pyridin-2(1H)-one with amino acids. Chem Heterocycl Compd (N Y) 2022. [DOI: 10.1007/s10593-021-03045-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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3
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Nitulescu G, Nitulescu GM, Zanfirescu A, Mihai DP, Gradinaru D. Candidates for Repurposing as Anti-Virulence Agents Based on the Structural Profile Analysis of Microbial Collagenase Inhibitors. Pharmaceutics 2021; 14:62. [PMID: 35056958 DOI: 10.3390/pharmaceutics14010062] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 12/21/2021] [Accepted: 12/26/2021] [Indexed: 01/17/2023] Open
Abstract
The pharmacological inhibition of the bacterial collagenases (BC) enzymes is considered a promising strategy to block the virulence of the bacteria without targeting the selection mechanism leading to drug resistance. The chemical structures of the Clostridium perfringens collagenase A (ColA) inhibitors were analyzed using Bemis-Murcko skeletons, Murcko frameworks, the type of plain rings, and docking studies. The inhibitors were classified based on their structural architecture and various scoring methods were implemented to predict the probability of new compounds to inhibit ColA and other BC. The analyses indicated that all compounds contain at least one aromatic ring, which is often a nitrobenzene fragment. 2-Nitrobenzene based compounds are, on average, more potent BC inhibitors compared to those derived from 4-nitrobenzene. The molecular descriptors MDEO-11, AATS0s, ASP-0, and MAXDN were determined as filters to identify new BC inhibitors and highlighted the necessity for a compound to contain at least three primary oxygen atoms. The DrugBank database was virtually screened using the developed methods. A total of 100 compounds were identified as potential BC inhibitors, of which, 10 are human approved drugs. Benzthiazide, entacapone, and lodoxamide were chosen as the best candidates for in vitro testing based on their pharmaco-toxicological profile.
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4
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Zhang Y, Pike A. Pyridones in drug discovery: Recent advances. Bioorg Med Chem Lett 2021; 38:127849. [DOI: 10.1016/j.bmcl.2021.127849] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 01/29/2021] [Accepted: 02/02/2021] [Indexed: 12/17/2022]
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5
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Keshk RM, Garavelli M, El–Tahawy MM. Synthesis, physicochemical and vibrational spectral properties of 2–pyridone and 2–aminopyridine derivatives: An experimental and theoretical study. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129136] [Citation(s) in RCA: 1] [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: 10/23/2022]
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6
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Jayarajan R, Satheeshkumar R, Kottha T, Subbaramanian S, Sayin K, Vasuki G. Water mediated synthesis of 6-amino-5-cyano-2-oxo-N-(pyridin-2-yl)-4-(p-tolyl)-2H-[1,2'-bipyridine]-3-carboxamide and 6-amino-5-cyano-4-(4-fluorophenyl)-2-oxo-N-(pyridin-2-yl)-2H-[1,2'-bipyridine]-3-carboxamide - An experimental and computational studies with non-linear optical (NLO) and molecular docking analyses. Spectrochim Acta A Mol Biomol Spectrosc 2020; 229:117861. [PMID: 31806479 DOI: 10.1016/j.saa.2019.117861] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 11/23/2019] [Accepted: 11/24/2019] [Indexed: 06/10/2023]
Abstract
6-Amino-5-cyano-2-oxo-N-(pyridin-2-yl)-4-(p-tolyl)-2H-[1,2'-bipyridine]-3-carboxamide and 6-amino-5-cyano-4-(4-fluorophenyl)-2-oxo-N-(pyridin-2-yl)-2H-[1,2'-bipyridine]-3-carboxamide were synthesized through three-component reaction between N1,N3-di(pyridin-2-yl)-malonamide, aldehyde and malononitrile in water using triethylamine as a base at room temperature. Synthesized compounds were characterized by using different techniques (FT-IR, NMR and X-ray diffraction). Additionally, the mentioned compounds were investigated by computational chemistry methods. Obtained results were supported with calculated results. Additionally, NLO properties and molecular docking analyses of related compounds were examined in detail. The binding modes of the compounds 4a and 4b were explored with the colchicine binding site of tubulin, from molecular docking studies, remarkable interactions have been observed for 4a and 4b near to the colchicines binding site of tubulin that may contribute to the inhibition of tubulin polymerization and anticancer activity.
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Affiliation(s)
- Ramasamy Jayarajan
- Department of Chemistry, Pondicherry University, Pondicherry 605014, India; Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Rajendran Satheeshkumar
- Departamento de Química Orgánica, Facultad de Química, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, 702843 Santiago, Chile
| | | | - Sabarinathan Subbaramanian
- Department of Chemistry, Pondicherry University, Pondicherry 605014, India; Department of Chemistry, SRM Institute of Science and Technology (SRMIST), Vadapalani, Chennai-600026, TamilNadu, India
| | - Koray Sayin
- Department of Chemistry, Faculty of Science, Sivas Cumhuriyet University, 58140 Sivas, Turkey; Sivas Cumhuriyet University Advanced Research and Application Center (CUTAM), 58140 Sivas, Turkey.
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7
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Abstract
A one-pot, metal-free, double cyclization for the synthesis of bicyclic 2-pyridones as peptidomimetics was developed. In this process, the transformation of 2-pyrones bearing a tethered, homochiral α-amino acid started with the removal of the N-Boc protective group under acidic or neutral conditions at elevated temperature, followed by several key transformations, including cyclic enamine formation, decarboxylation or esterification, isomerization, and lactamization, to furnish bicyclic 2-pyridones in up to 98% yield with retention of the chirality at the α-carbon of the amino acid portion of the molecule. Exploration of the substrate scope revealed some selectivity between the decarboxylation and esterification pathways under thermal acidic conditions, while performing the reaction in boiling water yielded the decarboxylation products exclusively.
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Affiliation(s)
- Wannaporn Disadee
- Laboratory of Medicinal Chemistry , Chulabhorn Research Institute , Lak Si, Bangkok 10210 , Thailand
| | - Anek Lekky
- Laboratory of Medicinal Chemistry , Chulabhorn Research Institute , Lak Si, Bangkok 10210 , Thailand
| | - Somsak Ruchirawat
- Laboratory of Medicinal Chemistry , Chulabhorn Research Institute , Lak Si, Bangkok 10210 , Thailand.,Program on Chemical Biology , Chulabhorn Graduate Institute , Lak Si, Bangkok 10210 , Thailand.,The Center of Excellence on Environmental Health and Toxicology , PERDO, Bangkok , 10400 , Thailand
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8
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Kulén M, Núñez-Otero C, Cairns AG, Silver J, Lindgren AEG, Wede E, Singh P, Vielfort K, Bahnan W, Good JAD, Svensson R, Bergström S, Gylfe Å, Almqvist F. Methyl sulfonamide substituents improve the pharmacokinetic properties of bicyclic 2-pyridone based Chlamydia trachomatis inhibitors. Medchemcomm 2019; 10:1966-1987. [PMID: 32206238 PMCID: PMC7069368 DOI: 10.1039/c9md00405j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 09/20/2019] [Indexed: 01/03/2023]
Abstract
Methyl sulfonamide substituents effectively improve the pharmacokinetic properties of bicyclic 2-pyridones, a new class of Chlamydia trachomatis infectivity inhibitors.
Chlamydia trachomatis infections are a global health problem and new approaches to treat C. trachomatis with drugs of high specificity would be valuable. A library of substituted ring fused 2-pyridones has been synthesized and evaluated for their ability to attenuate C. trachomatis infectivity. In vivo pharmacokinetic studies were performed, with the best candidates demonstrating that a C8-methylsulfonamide substituent improved pharmacokinetic properties important for oral administration. C8-Methyl sulfonamide analogue 30 inhibited C. trachomatis infectivity in low micromolar concentrations. Further pharmacokinetic evaluation at an oral dose of 10 mg kg–1 showed an apparent bioavailability of 41%, compared to C8-cyclopropyl and -methoxy analogues which had negligible oral uptake. In vitro ADME (absorption, distribution, metabolism and excretion) testing of solubility and Caco-2 cell permeability revealed that both solubility and permeability is greatly improved with the C8-methyl sulfonamide 30, effectively moving it from BCS (Biopharmaceutical Classification System) class IV to II.
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Affiliation(s)
- Martina Kulén
- Department of Chemistry , Umeå University , 901 87 Umeå , Sweden . .,Umeå Centre for Microbial Research , Umeå University , 901 87 Umeå , Sweden . ;
| | - Carlos Núñez-Otero
- 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
| | - Andrew G Cairns
- 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
| | - Anders E G Lindgren
- Department of Chemistry , Umeå University , 901 87 Umeå , Sweden . .,Umeå Centre for Microbial Research , Umeå University , 901 87 Umeå , Sweden . ;
| | - Emma Wede
- 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
| | - Pardeep Singh
- Department of Chemistry , Umeå University , 901 87 Umeå , Sweden . .,Umeå Centre for Microbial Research , Umeå University , 901 87 Umeå , Sweden . ;
| | - Katarina Vielfort
- 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
| | - 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
| | - James A D Good
- Department of Chemistry , Umeå University , 901 87 Umeå , Sweden . .,Umeå Centre for Microbial Research , Umeå University , 901 87 Umeå , Sweden . ;
| | - Richard Svensson
- The Uppsala University Drug Optimization and Pharmaceutical Profiling Platform , Department of Pharmacy , Uppsala University , SE-751 23 Uppsala , Sweden.,SciLifeLab Drug Discovery and Development Platform , ADME of Therapeutics Facility , Uppsala University , SE-751 23 Uppsala , 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
| | - 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
| | - Fredrik Almqvist
- Department of Chemistry , Umeå University , 901 87 Umeå , Sweden . .,Umeå Centre for Microbial Research , Umeå University , 901 87 Umeå , Sweden . ;
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9
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Bayat M, Safari F, Nasri S, Hosseini FS. A chemoselective synthesis and biological evaluation of novel benzo[g]thiazolo[3,2-a]quinolone derivatives. Monatsh Chem 2019. [DOI: 10.1007/s00706-018-2337-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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10
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Good JAD, Kulén M, Silver J, Krishnan KS, Bahnan W, Núñez-Otero C, Nilsson I, Wede E, de Groot E, Gylfe Å, Bergström S, Almqvist F. Thiazolino 2-Pyridone Amide Isosteres As Inhibitors of Chlamydia trachomatis Infectivity. J Med Chem 2017; 60:9393-9399. [DOI: 10.1021/acs.jmedchem.7b00716] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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
| | - Martina Kulén
- 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
| | - K. Syam Krishnan
- Department
of Chemistry, Umeå University, 901 87 Umeå, Sweden
- Umeå
Centre for Microbial Research, Umeå University, 901 87 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
| | - Carlos Núñez-Otero
- Umeå
Centre for Microbial Research, Umeå University, 901 87 Umeå, Sweden
- Laboratory
for Molecular Infection Medicine Sweden (MIMS), Umeå University, 901 87 Umeå, Sweden
- Clinical
microbiology, Umeå University, 901 85 Umeå, Sweden
| | - Ingela Nilsson
- 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
| | - Emma Wede
- 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
| | - Esmee de Groot
- 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
| | - 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
- 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
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11
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Chicca A, Berg R, Jessen HJ, Marck N, Schmid F, Burch P, Gertsch J, Gademann K. Biological evaluation of pyridone alkaloids on the endocannabinoid system. Bioorg Med Chem 2017; 25:6102-6114. [DOI: 10.1016/j.bmc.2017.02.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 02/10/2017] [Accepted: 02/14/2017] [Indexed: 10/20/2022]
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12
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Johnson BK, Abramovitch RB. Small Molecules That Sabotage Bacterial Virulence. Trends Pharmacol Sci 2017; 38:339-62. [PMID: 28209403 DOI: 10.1016/j.tips.2017.01.004] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 01/01/2017] [Accepted: 01/06/2017] [Indexed: 02/08/2023]
Abstract
The continued rise of antibiotic-resistant bacterial infections has motivated alternative strategies for target discovery and treatment of infections. Antivirulence therapies function through inhibition of in vivo required virulence factors to disarm the pathogen instead of directly targeting viability or growth. This approach to treating bacteria-mediated diseases may have advantages over traditional antibiotics because it targets factors specific for pathogenesis, potentially reducing selection for resistance and limiting collateral damage to the resident microbiota. This review examines vulnerable molecular mechanisms used by bacteria to cause disease and the antivirulence compounds that sabotage these virulence pathways. By expanding the study of antimicrobial targets beyond those that are essential for growth, antivirulence strategies offer new and innovative opportunities to combat infectious diseases.
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13
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Abstract
A practical one-pot process based on two-fold intramolecular cyclizations provides a more expedient entry into a variety of bicyclic 2-pyridones.
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Affiliation(s)
- Somsak Ruchirawat
- Laboratory of Medicinal Chemistry
- Chulabhorn Research Institute
- Bangkok 10210
- Thailand
- Program in Chemical Biology
| | - Wannaporn Disadee
- Laboratory of Medicinal Chemistry
- Chulabhorn Research Institute
- Bangkok 10210
- Thailand
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14
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Abstract
The widespread use of antibiotics in the past 80 years has saved millions of human lives, facilitated technological progress and killed incalculable numbers of microbes, both pathogenic and commensal. Human-associated microbes perform an array of important functions, and we are now just beginning to understand the ways in which antibiotics have reshaped their ecology and the functional consequences of these changes. Mounting evidence shows that antibiotics influence the function of the immune system, our ability to resist infection, and our capacity for processing food. Therefore, it is now more important than ever to revisit how we use antibiotics. This review summarizes current research on the short-term and long-term consequences of antibiotic use on the human microbiome, from early life to adulthood, and its effect on diseases such as malnutrition, obesity, diabetes, and Clostridium difficile infection. Motivated by the consequences of inappropriate antibiotic use, we explore recent progress in the development of antivirulence approaches for resisting infection while minimizing resistance to therapy. We close the article by discussing probiotics and fecal microbiota transplants, which promise to restore the microbiota after damage of the microbiome. Together, the results of studies in this field emphasize the importance of developing a mechanistic understanding of gut ecology to enable the development of new therapeutic strategies and to rationally limit the use of antibiotic compounds.
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Affiliation(s)
- Amy Langdon
- Center for Genome Sciences, Washington University School of Medicine, Campus Box 8510, 4515 McKinley Research Building, St. Louis, MO, 63108, USA
- Clinical Research Training Center, Washington University School of Medicine, Campus Box 8051, 660 South Euclid Avenue, St. Louis, MO, 63110-1093, USA
| | - Nathan Crook
- Center for Genome Sciences, Washington University School of Medicine, Campus Box 8510, 4515 McKinley Research Building, St. Louis, MO, 63108, USA
- Department of Pathology & Immunology, Washington University School of Medicine, Campus Box 8118, 660 South Euclid Ave, St. Louis, MO, 63110, USA
| | - Gautam Dantas
- Center for Genome Sciences, Washington University School of Medicine, Campus Box 8510, 4515 McKinley Research Building, St. Louis, MO, 63108, USA.
- Department of Pathology & Immunology, Washington University School of Medicine, Campus Box 8118, 660 South Euclid Ave, St. Louis, MO, 63110, USA.
- Department of Biomedical Engineering, Washington University in Saint Louis, Campus Box 1097, 1 Brookings Drive, Saint Louis, MO, 63130, USA.
- Department of Molecular Microbiology, Washington University School of Medicine, Campus Box 8230, 660 S. Euclid Ave, St. Louis, MO, 63110, USA.
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15
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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] [What about the content of this article? (0)] [Affiliation(s)] [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.
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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
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16
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Singh P, Chorell E, Krishnan KS, Kindahl T, Åden J, Wittung-Stafshede P, Almqvist F. Synthesis of Multiring Fused 2-Pyridones via a Nitrene Insertion Reaction: Fluorescent Modulators of α-Synuclein Amyloid Formation. Org Lett 2015; 17:6194-7. [DOI: 10.1021/acs.orglett.5b03190] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Pardeep Singh
- Umeå University, Department of Chemistry, 90187 Umeå, Sweden
| | - Erik Chorell
- Umeå University, Department of Chemistry, 90187 Umeå, Sweden
| | | | - Tomas Kindahl
- Umeå University, Department of Chemistry, 90187 Umeå, Sweden
| | - Jörgen Åden
- Umeå University, Department of Chemistry, 90187 Umeå, Sweden
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17
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Abstract
The rise of multidrug resistant bacteria is a major worldwide health concern. There is currently an unmet need for the development of new and selective antibacterial drugs. Therapies that target and disarm the crucial virulence factors of pathogenic bacteria, while not actually killing the cells themselves, could prove to be vital for the treatment of numerous diseases. This article discusses the main surface architectures of pathogenic Gram-negative bacteria and the small molecules that have been discovered, which target their specific biogenesis pathways and/or actively block their virulence. The future perspective for the use of antivirulence compounds is also assessed.
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Affiliation(s)
- David Steadman
- Institute of Structural & Molecular Biology, Birkbeck & University College London, Malet Street, London, WC1E 7HX, UK
| | - Alvin Lo
- Structural & Molecular Microbiology, Structural Biology Research Center, VIB, Pleinlaan 2, 1050 Brussels, Belgium
| | - Gabriel Waksman
- Institute of Structural & Molecular Biology, Birkbeck & University College London, Malet Street, London, WC1E 7HX, UK
| | - Han Remaut
- Structural & Molecular Microbiology, Structural Biology Research Center, VIB, Pleinlaan 2, 1050 Brussels, Belgium
- Structural Biology Brussels, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
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18
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Andersson EK, Bengtsson C, Evans ML, Chorell E, Sellstedt M, Lindgren AE, Hufnagel DA, Bhattacharya M, Tessier PM, Wittung-Stafshede P, Almqvist F, Chapman MR. Modulation of curli assembly and pellicle biofilm formation by chemical and protein chaperones. Chem Biol 2013; 20:1245-54. [PMID: 24035282 PMCID: PMC4243843 DOI: 10.1016/j.chembiol.2013.07.017] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 07/19/2013] [Accepted: 07/30/2013] [Indexed: 12/22/2022]
Abstract
Enteric bacteria assemble functional amyloid fibers, curli, on their surfaces that share structural and biochemical properties with disease-associated amyloids. Here, we test rationally designed 2-pyridone compounds for their ability to alter amyloid formation of the major curli subunit CsgA. We identified several compounds that discourage CsgA amyloid formation and several compounds that accelerate CsgA amyloid formation. The ability of inhibitor compounds to stop growing CsgA fibers was compared to the same property of the CsgA chaperone, CsgE. CsgE blocked CsgA amyloid assembly and arrested polymerization when added to actively polymerizing fibers. Additionally, CsgE and the 2-pyridone inhibitors prevented biofilm formation by Escherichia coli at the air-liquid interface of a static culture. We demonstrate that curli amyloid assembly and curli-dependent biofilm formation can be modulated not only by protein chaperones, but also by "chemical chaperones."
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Affiliation(s)
- Emma K. Andersson
- Umeå Centre for Microbial Research, Umeå University, 901 87 Umeå, Sweden
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden
| | - Christoffer Bengtsson
- Umeå Centre for Microbial Research, Umeå University, 901 87 Umeå, Sweden
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden
| | - Margery L. Evans
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI 48109-1048, USA
| | - Erik Chorell
- Umeå Centre for Microbial Research, Umeå University, 901 87 Umeå, Sweden
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden
| | - Magnus Sellstedt
- Umeå Centre for Microbial Research, Umeå University, 901 87 Umeå, Sweden
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden
| | | | - David A. Hufnagel
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI 48109-1048, USA
| | - Moumita Bhattacharya
- Center for Biotechnology and Interdisciplinary Studies, Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - Peter M. Tessier
- Center for Biotechnology and Interdisciplinary Studies, Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | | | - Fredrik Almqvist
- Umeå Centre for Microbial Research, Umeå University, 901 87 Umeå, Sweden
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden
| | - Matthew R. Chapman
- Umeå Centre for Microbial Research, Umeå University, 901 87 Umeå, Sweden
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI 48109-1048, USA
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Piatek R, Zalewska-Piatek B, Dzierzbicka K, Makowiec S, Pilipczuk J, Szemiako K, Cyranka-Czaja A, Wojciechowski M. Pilicides inhibit the FGL chaperone/usher assisted biogenesis of the Dr fimbrial polyadhesin from uropathogenic Escherichia coli. BMC Microbiol 2013; 13:131. [PMID: 23758700 PMCID: PMC3706281 DOI: 10.1186/1471-2180-13-131] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Accepted: 06/04/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The global spread of bacterial resistance has given rise to a growing interest in new anti-bacterial agents with a new strategy of action. Pilicides are derivatives of ring-fused 2-pyridones which block the formation of the pili/fimbriae crucial to bacterial pathogenesis. They impair by means of a chaperone-usher pathway conserved in the Gram-negative bacteria of adhesive structures biogenesis. Pili/fimbriae of this type belong to two subfamilies, FGS and FGL, which differ in the details of their assembly mechanism. The data published to date have shown that pilicides inhibit biogenesis of type 1 and P pili of the FGS type which are encoded by uropathogenic E. coli strains. RESULTS We evaluated the anti-bacterial activity of literature pilicides as blockers of the assembly of a model example of FGL-type adhesive structures--the Dr fimbriae encoded by a dra gene cluster of uropathogenic Escherichia coli strains. In comparison to the strain grown without pilicide, the Dr⁺ bacteria cultivated in the presence of the 3.5 mM concentration of pilicides resulted in a reduction of 75 to 87% in the adherence properties to CHO cells expressing Dr fimbrial DAF receptor protein. Using quantitative assays, we determined the amount of Dr fimbriae in the bacteria cultivated in the presence of 3.5 mM of pilicides to be reduced by 75 to 81%. The inhibition effect of pilicides is concentration dependent, which is a crucial property for their use as potential anti-bacterial agents. The data presented in this article indicate that pilicides in mM concentration effectively inhibit the adherence of Dr⁺ bacteria to the host cells--the crucial, initial step in bacterial pathogenesis. CONCLUSIONS Structural analysis of the DraB chaperone clearly showed it to be a model of the FGL subfamily of chaperones. This permits us to conclude that analyzed pilicides in mM concentration are effective inhibitors of the assembly of adhesins belonging to the Dr family, and more speculatively, of other FGL-type adhesive organelles. The presented data and those published so far permit to speculate that based on the conservation of chaperone-usher pathway in Gram-negative bacteria , the pilicides are potential anti-bacterial agents with activity against numerous pathogens, the virulence of which is dependent on the adhesive structures of the chaperone-usher type.
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Affiliation(s)
- Rafał Piatek
- Department of Microbiology, Gdańsk University of Technology, ul. Narutowicza 11/12, Gdańsk 80-233, Poland.
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20
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El-Essawy FA, El-Sayed WA, El-Etrawy AS, El-Bayaa MN. Synthesis of New Isolated and Fused Tri- and Tetracyclic Pyridine Derivatives. Chem Heterocycl Compd (N Y) 2013. [DOI: 10.1007/s10593-013-1219-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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Horvath I, Sellstedt M, Weise C, Nordvall LM, Krishna Prasad G, Olofsson A, Larsson G, Almqvist F, Wittung-Stafshede P. Modulation of α-synuclein fibrillization by ring-fused 2-pyridones: templation and inhibition involve oligomers with different structure. Arch Biochem Biophys 2013; 532:84-90. [PMID: 23399432 DOI: 10.1016/j.abb.2013.01.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Revised: 01/28/2013] [Accepted: 01/30/2013] [Indexed: 11/16/2022]
Abstract
In a recent study we discovered that a ring-fused 2-pyridone compound triggered fibrillization of a key protein in Parkinson's disease, α-synuclein. To reveal how variations in compound structure affect protein aggregation, we now prepared a number of strategic analogs and tested their effects on α-synuclein amyloid fiber formation in vitro. We find that, in contrast to the earlier templating effect, some analogs inhibit α-synuclein fibrillization. For both templating and inhibiting compounds, the key species formed in the reactions are α-synuclein oligomers that contain compound. Despite similar macroscopic appearance, the templating and inhibiting oligomers are distinctly different in secondary structure content. When the inhibitory oligomers are added in seed amounts, they inhibit fresh α-synuclein aggregation reactions. Our study demonstrates that small chemical changes to the same central fragment can result in opposite effects on protein aggregation.
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Affiliation(s)
- Istvan Horvath
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden
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22
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Zhou Q, Chu X, Tang W, Lu T. An efficient one-pot synthesis of 1,4-disubstituted 3-amino-2-pyridone derivatives via three-component reactions of alkynyl aldehydes and amines with ethyl 2-((diphenylmethylene)amino)acetate. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.03.106] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Chorell E, Pinkner JS, Bengtsson C, Banchelin TSL, Edvinsson S, Linusson A, Hultgren SJ, Almqvist F. Mapping pilicide anti-virulence effect in Escherichia coli, a comprehensive structure-activity study. Bioorg Med Chem 2012; 20:3128-42. [PMID: 22464688 PMCID: PMC3753005 DOI: 10.1016/j.bmc.2012.01.048] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Revised: 01/20/2012] [Accepted: 01/25/2012] [Indexed: 01/12/2023]
Abstract
Pilicides prevent pili formation and thereby the development of bacterial biofilms in Escherichia coli. We have performed a comprehensive structure activity relationship (SAR) study of the dihydrothiazolo ring-fused 2-pyridone pilicide central fragment by varying all open positions. Orthogonal projections to latent structures discriminant analysis (OPLS-DA) was used to distinguish active from inactive compounds in which polarity proved to be the most important factor for discrimination. A quantitative SAR (QSAR) partial least squares (PLS) model was calculated on the active compounds for prediction of biofilm inhibition activity. In this model, compounds with high inhibitory activity were generally larger, more lipophilic, more flexible and had a lower HOMO. Overall, this resulted in both highly valuable SAR information and potent inhibitors of type 1 pili dependent biofilm formation. The most potent biofilm inhibitor had an EC(50) of 400 nM.
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Affiliation(s)
- Erik Chorell
- Department of Chemistry, Umeå University, SE-90187 Umeå, Sweden
- Department of Molecular Microbiology, Center for Women’s Infectious Disease Research, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Jerome S. Pinkner
- Department of Molecular Microbiology, Center for Women’s Infectious Disease Research, Washington University School of Medicine, St. Louis, MO 63110, USA
| | | | - Thomas Sainte-Luce Banchelin
- Department of Chemistry, Umeå University, SE-90187 Umeå, Sweden
- Umeå Centre for Microbial Research, Umeå University, SE-90187 Umeå, Sweden
| | - Sofie Edvinsson
- Department of Chemistry, Umeå University, SE-90187 Umeå, Sweden
| | - Anna Linusson
- Department of Chemistry, Umeå University, SE-90187 Umeå, Sweden
| | - Scott J. Hultgren
- Department of Molecular Microbiology, Center for Women’s Infectious Disease Research, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Fredrik Almqvist
- Department of Chemistry, Umeå University, SE-90187 Umeå, Sweden
- Umeå Centre for Microbial Research, Umeå University, SE-90187 Umeå, Sweden
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24
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Klinth JE, Pinkner JS, Hultgren SJ, Almqvist F, Uhlin BE, Axner O. Impairment of the biomechanical compliance of P pili: a novel means of inhibiting uropathogenic bacterial infections? Eur Biophys J 2012; 41:285-95. [PMID: 22237603 PMCID: PMC3281203 DOI: 10.1007/s00249-011-0784-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Revised: 11/25/2011] [Accepted: 12/06/2011] [Indexed: 12/28/2022]
Abstract
Gram-negative bacteria often initiate their colonization by use of extended attachment organelles, so called pili. When exposed to force, the rod of helix-like pili has been found to be highly extendable, mainly attributed to uncoiling and recoiling of its quaternary structure. This provides the bacteria with the ability to redistribute an external force among a multitude of pili, which enables them to withstand strong rinsing flows, which, in turn, facilitates adherence and colonization processes critical to virulence. Thus, pili fibers are possible targets for novel antibacterial agents. By use of a substance that compromises compliance of the pili, the ability of bacteria to redistribute external forces can be impaired, so they will no longer be able to resist strong urine flow and thus be removed from the host. It is possible such a substance can serve as an alternative to existing antibiotics in the future or be a part of a multi-drug. In this work we investigated whether it is possible to achieve this by targeting the recoiling process. The test substance was purified PapD. The effect of PapD on the compliance of P pili was assessed at the single organelle level by use of force-measuring optical tweezers. We showed that the recoiling process, and thus the biomechanical compliance, in particular the recoiling process, can be impaired by the presence of PapD. This leads to a new concept in the search for novel drug candidates combating uropathogenic bacterial infections--"coilicides", targeting the subunits of which the pilus rod is composed.
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Affiliation(s)
- Jeanna E Klinth
- Department of Physics, Umeå University, 901 87 Umeå, Sweden.
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25
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P. Mahajan M, Singh P, Singh P, Kumar K, Kumar V, Bisetty K. Synthetic Studies on the Role of Substituents at C-3 Position on C3-C4 Bond Cleavage of β-Lactam Ring: Convenient Route for Diastereoselective Synthesis of Pyridin-2-ones. HETEROCYCLES 2012. [DOI: 10.3987/com-12-s(n)83] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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26
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Bengtsson C, Almqvist F. A selective intramolecular 5-exo-dig or 6-endo-dig cyclization en route to 2-furanone or 2-pyrone containing tricyclic scaffolds. J Org Chem 2011; 76:9817-25. [PMID: 22008034 PMCID: PMC3225090 DOI: 10.1021/jo201952p] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ringfused bicyclic 2-pyridones exhibit interesting biological properties against pili assembly in uropathogenic Escherichia coli (Pinkner, J. S. et al. Proc. Natl. Acad. Sci. U. S. A.2006, 103, 17897-17902; Åberg, V. et al. Org. Biomol. Chem.2007, 5, 1827-1834) as well as curli formation (Cegelski, L. et al. Nat. Chem. Biol.2009, 5, 913-919). In the search for new ring-fused central fragments, highly selective synthetic routes to the 2-furanone or 2-pyrone containing tricyclic scaffolds 1 and 2 have been developed.
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27
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Affiliation(s)
- Wendy A. Loughlin
- School of Science, Nathan Campus, Griffith University, Brisbane, QLD 4111, Australia, and Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, University of Queensland, Brisbane, QLD 4072, Australia This is a Chemical Reviews Perennial Review. The root paper of this title was published in Chem. Rev. 2004, 104 (12), 6085−6117, DOI: 10.1021/cr040648k; Published (Web) Nov. 4, 2004. Updates to the text appear in red type
| | - Joel D. A. Tyndall
- School of Science, Nathan Campus, Griffith University, Brisbane, QLD 4111, Australia, and Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, University of Queensland, Brisbane, QLD 4072, Australia This is a Chemical Reviews Perennial Review. The root paper of this title was published in Chem. Rev. 2004, 104 (12), 6085−6117, DOI: 10.1021/cr040648k; Published (Web) Nov. 4, 2004. Updates to the text appear in red type
| | - Matthew P. Glenn
- School of Science, Nathan Campus, Griffith University, Brisbane, QLD 4111, Australia, and Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, University of Queensland, Brisbane, QLD 4072, Australia This is a Chemical Reviews Perennial Review. The root paper of this title was published in Chem. Rev. 2004, 104 (12), 6085−6117, DOI: 10.1021/cr040648k; Published (Web) Nov. 4, 2004. Updates to the text appear in red type
| | - Timothy A. Hill
- School of Science, Nathan Campus, Griffith University, Brisbane, QLD 4111, Australia, and Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, University of Queensland, Brisbane, QLD 4072, Australia This is a Chemical Reviews Perennial Review. The root paper of this title was published in Chem. Rev. 2004, 104 (12), 6085−6117, DOI: 10.1021/cr040648k; Published (Web) Nov. 4, 2004. Updates to the text appear in red type
| | - David P. Fairlie
- School of Science, Nathan Campus, Griffith University, Brisbane, QLD 4111, Australia, and Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, University of Queensland, Brisbane, QLD 4072, Australia This is a Chemical Reviews Perennial Review. The root paper of this title was published in Chem. Rev. 2004, 104 (12), 6085−6117, DOI: 10.1021/cr040648k; Published (Web) Nov. 4, 2004. Updates to the text appear in red type
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28
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29
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Sellstedt M, Nyberg A, Rosenbaum E, Engström P, Wickström M, Gullbo J, Bergström S, Johansson LB, Almqvist F. Synthesis and Characterization of a Multi Ring-Fused 2-Pyridone-Based Fluorescent Scaffold. European J Org Chem 2010; 2010:6171-8. [DOI: 10.1002/ejoc.201000796] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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30
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Chorell E, Pinkner JS, Phan G, Edvinsson S, Buelens F, Remaut H, Waksman G, Hultgren SJ, Almqvist F. Design and synthesis of C-2 substituted thiazolo and dihydrothiazolo ring-fused 2-pyridones: pilicides with increased antivirulence activity. J Med Chem 2010; 53:5690-5. [PMID: 20586493 DOI: 10.1021/jm100470t] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Pilicides block pili formation by binding to pilus chaperones and blocking their function in the chaperone/usher pathway in E. coli. Various C-2 substituents were introduced on the pilicide scaffold by design and synthetic method developments. Experimental evaluation showed that proper substitution of this position affected the biological activity of the compound. Aryl substituents resulted in pilicides with significantly increased potencies as measured in pili-dependent biofilm and hemagglutination assays. The structural basis of the PapD chaperone-pilicide interactions was determined by X-ray crystallography.
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Affiliation(s)
- Erik Chorell
- Department of Chemistry, Umeå University, SE-90187 Umeå, Sweden
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31
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32
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Abstract
A novel heterocyclic scaffold with a peptidomimetic backbone structure has been synthesized. The scaffold is formed by insertion of primary amines into a cyclic sulfone to give the corresponding ring-expanded sulfonamides. By varying the amine component, a series of potentially biologically interesting compounds has been synthesized.
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Affiliation(s)
- Magnus Sellstedt
- Department of Chemistry, Umeå University, SE-901 87 Umeå, Sweden
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33
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Abstract
Antibiotic resistance is one of the greatest challenges of the twenty-first century. However, the increasing understanding of bacterial pathogenesis and intercellular communication has revealed many potential strategies to develop novel drugs to treat bacteria-mediated disease. Interference with bacterial virulence and/or cell-to-cell signalling pathways is an especially compelling approach, as it is thought to apply less selective pressure for the development of bacterial resistance than traditional strategies, which are aimed at killing bacteria or preventing their growth. Here, we discuss the mechanisms of bacterial virulence and present promising anti-virulence strategies and compounds for the future treatment of bacterial infections.
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34
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Knight SD, Bouckaert J. Structure, Function, and Assembly of Type 1 Fimbriae. Glycoscience and Microbial Adhesion 2009; 288:67-107. [DOI: 10.1007/128_2008_13] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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35
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Pemberton N, Pinkner JS, Edvinsson S, Hultgren SJ, Almqvist F. Synthesis and evaluation of dihydroimidazolo and dihydrooxazolo ring-fused 2-pyridones—targeting pilus biogenesis in uropathogenic bacteria. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.07.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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36
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Abstract
An efficient method to synthesize a novel rigid tricyclic peptidomimetic scaffold through ring-closure of amino-functionalized bicyclic 2-pyridones has been discovered. The scaffold can function as a peptide backbone mimetic (highlighted) with two substituents independently variable to fine-tune biological response. Halogenation of the pyrazolo ring followed by Suzuki couplings made it possible to introduce substituents with variable electronic properties late in the synthetic route, which is preferable in library synthesis.
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Affiliation(s)
- Magnus Sellstedt
- Department of Chemistry, Umeå University, SE-901 87 Umeå, Sweden
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37
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Escaich S. Antivirulence as a new antibacterial approach for chemotherapy. Curr Opin Chem Biol 2008; 12:400-8. [DOI: 10.1016/j.cbpa.2008.06.022] [Citation(s) in RCA: 139] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2008] [Revised: 06/19/2008] [Accepted: 06/20/2008] [Indexed: 12/11/2022]
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38
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Berg V, Das P, Chorell E, Hedenström M, Pinkner JS, Hultgren SJ, Almqvist F. Carboxylic acid isosteres improve the activity of ring-fused 2-pyridones that inhibit pilus biogenesis in E. coli. Bioorg Med Chem Lett 2008; 18:3536-40. [PMID: 18499455 PMCID: PMC3665338 DOI: 10.1016/j.bmcl.2008.05.020] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2008] [Revised: 05/05/2008] [Accepted: 05/05/2008] [Indexed: 02/04/2023]
Abstract
Ring-fused 2-pyridones, termed pilicides, are small synthetic compounds that inhibit pilus assembly in uropathogenic Escherichia coli. Their biological activity is clearly dependent upon a carboxylic acid functionality. Here, we present the synthesis and biological evaluation of carboxylic acid isosteres, including, for example, tetrazoles, acyl sulfonamides, and hydroxamic acids of two lead 2-pyridones. Two independent biological evaluations show that acyl sulfonamides and tetrazoles significantly improve pilicide activity against uropathogenic E. coli.
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Affiliation(s)
- Veronica Berg
- Department of Chemistry, Umeå University, SE-90187 Umeå, Sweden
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39
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Singh V, Yadav GP, Maulik PR, Batra S. Synthesis of substituted 3-methylene-2-pyridones from Baylis–Hillman derivatives and its application for the generation of 2-pyridone substituted spiroisoxazolines. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.01.074] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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40
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Dings RPM, Mayo KH. A journey in structure-based drug discovery: from designed peptides to protein surface topomimetics as antibiotic and antiangiogenic agents. Acc Chem Res 2007; 40:1057-65. [PMID: 17661438 DOI: 10.1021/ar700086k] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Most biological events are mediated through molecular interactions by proteins, and because proteins are composed of structural units like helices, beta-sheets and turns, small peptides and peptidomimetics may be used to mimic their biological effects and even as therapeutic agents in the clinic. Here, we present a structure-based, scaffold-driven approach to design bioactive peptides and peptidomimetics. Initially, we designed a novel series of beta-sheet-forming peptides that mimic the activities of both antibiotic bacterial membrane disrupting peptides and antiangiogenic proteins. We subsequently used structure-activity relationships to reduce the design to partial peptide mimetics and then to fully nonpeptide topomimetics. Some of these agents are currently in extensive preclinical studies for further development as drug candidates against infectious disease and cancer.
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Affiliation(s)
- Ruud P M Dings
- Department of Biochemistry, Molecular Biology & Biophysics, University of Minnesota, Minneapolis, Minnesota 55455, USA
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Gavara L, Rigo B, Couturier D, Goossens L, Hénichart J. Toward new camptothecins. Part 4: On the reactivity of nitro and amino precursors of aza analogs of 5-methoxycarbonyl camptothecin. Tetrahedron 2007; 63:9456-64. [DOI: 10.1016/j.tet.2007.06.083] [Citation(s) in RCA: 7] [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: 01/02/2023]
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Abstract
Thiazolo ring-fused 2-pyridones have proven to be highly interesting scaffolds for the development of biologically active compounds. Many methods are today available to introduce a variety of substituents in the 2-pyridone part of the heterocycle. Herein we disclose how a diverse set of substituents can be introduced in the thiazolo ring, with possibilities to vary also the spatial arrangement of the substituents. A key intermediate is the oxidized framework 9 for which an effective synthesis is described. The thiazolo part of this system can be substituted either via conjugate additions, resulting in trans selectivity, or via microwave-assisted Heck couplings that result in unsaturated aryl-substituted analogues. The scaffold can also be lithiated followed by the addition of various electrophiles, which increases the diversification potential substantially, as exemplified with the introduction of halogens, alkyl, acyl, and amide substituents.
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Affiliation(s)
- Erik Chorell
- Department of Chemistry, Umeå University, SE-90187 Umeå, Sweden
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Abstract
In a time of emerging bacterial resistance there is a vital need for new targets and strategies in antibacterial therapy. Using uropathogenic Escherichia coli as a model pathogen we have developed a class of compounds, pilicides, which inhibit the formation of virulence-associated organelles termed pili. The pilicides interfere with a highly conserved bacterial assembly and secretion system called the chaperone-usher pathway, which is abundant in a vast number of Gram-negative pathogens and serves to assemble multi-protein surface fibers (pili/fimbriae). This class of compounds provides a platform to gain insight into important biological processes such as the molecular mechanisms of the chaperone-usher pathway and the sophisticated function of pili. Pili are primarily involved in bacterial adhesion, invasion and persistence to host defenses. On this basis, pilicides can aid the development of new antibacterial agents.
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Affiliation(s)
- Veronica Aberg
- Department of Chemistry, Umeå University, SE-90187, Umeå, Sweden.
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Aberg V, Fällman E, Axner O, Uhlin BE, Hultgren SJ, Almqvist F. Pilicides regulate pili expression in E. coli without affecting the functional properties of the pilus rod. Mol Biosyst 2007; 3:214-8. [PMID: 17308668 DOI: 10.1039/b613441f] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The infectious ability of uropathogenic Escherichia coli relies on adhesive fibers, termed pili or fimbriae, that are expressed on the bacterial surface. Pili are multi-protein structures that are formed via a highly preserved assembly and secretion system called the chaperone-usher pathway. We have earlier reported that small synthetic compounds, referred to as pilicides, disrupt both type 1 and P pilus biogenesis in E. coli. In this study, we show that the pilicides do not affect the structure, dynamics or function of the pilus rod. This was demonstrated by first suppressing the expression of P pili in E. coli by pilicide treatment and, next, measuring the biophysical properties of the pilus rod. The reduced abundance of pili was assessed with hemagglutination, atomic force microscopy and Western immunoblot analysis. The biodynamic properties of the pili fibers were determined by optical tweezers force measurements on individual pili and were found to be intact. The presented results establish a potential use of pilicides as chemical tools to study important biological processes e.g. adhesion, pilus biogenesis and the role of pili in infections and biofilm formation.
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Affiliation(s)
- Veronica Aberg
- Organic Chemistry, Umeå University, SE-90187 Umeå, Sweden
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