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Costa LD, Guieu S, Faustino MDAF, Tomé AC. Straightforward synthesis of thiazolo[5,4- c]isoquinolines from dithiooxamide and 2-halobenzaldehydes. NEW J CHEM 2022. [DOI: 10.1039/d1nj05536d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thiazolo[5,4-c]isoquinolines, an (up to now) elusive family of compounds, are prepared in one reaction only from simple commercial reagents.
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Affiliation(s)
- Letícia D. Costa
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Samuel Guieu
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
- CICECO, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | | | - Augusto C. Tomé
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
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2
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Carro L. Recent Progress in the Development of Small-Molecule FtsZ Inhibitors as Chemical Tools for the Development of Novel Antibiotics. Antibiotics (Basel) 2019; 8:E217. [PMID: 31717975 PMCID: PMC6963470 DOI: 10.3390/antibiotics8040217] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 10/26/2019] [Accepted: 11/05/2019] [Indexed: 01/20/2023] Open
Abstract
Antibiotics are potent pharmacological weapons against bacterial pathogens, nevertheless their efficacy is becoming compromised due to the worldwide emergence and spread of multidrug-resistant bacteria or "superbugs". Antibiotic resistance is rising to such dangerous levels that the treatment of bacterial infections is becoming a clinical challenge. Therefore, urgent action is needed to develop new generations of antibiotics that will help tackle this increasing and serious public health problem. Due to its essential role in bacterial cell division, the tubulin-like protein FtsZ has emerged as a promising target for the development of novel antibiotics with new mechanisms of action. This review highlights the medicinal chemistry efforts towards the identification of small-molecule FtsZ inhibitors with antibacterial activity in the last three years.
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Affiliation(s)
- Laura Carro
- Laboratorio de Química Orgánica y Farmacéutica, Departamento de Ciencias Farmacéuticas, Facultad de Farmacia, Universidad de Salamanca, Campus Miguel de Unamuno, 37007 Salamanca, Spain;
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
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3
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Lui HK, Gao W, Cheung KC, Jin WB, Sun N, Kan JW, Wong IL, Chiou J, Lin D, Chan EW, Leung YC, Chan TH, Chen S, Chan KF, Wong KY. Boosting the efficacy of anti-MRSA β-lactam antibiotics via an easily accessible, non-cytotoxic and orally bioavailable FtsZ inhibitor. Eur J Med Chem 2019; 163:95-115. [DOI: 10.1016/j.ejmech.2018.11.052] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 11/05/2018] [Accepted: 11/21/2018] [Indexed: 11/30/2022]
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4
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Bi F, Ji S, Venter H, Liu J, Semple SJ, Ma S. Substitution of terminal amide with 1H-1,2,3-triazole: Identification of unexpected class of potent antibacterial agents. Bioorg Med Chem Lett 2018; 28:884-891. [PMID: 29433923 DOI: 10.1016/j.bmcl.2018.02.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Revised: 12/25/2017] [Accepted: 02/01/2018] [Indexed: 11/15/2022]
Abstract
3-Methoxybenzamide (3-MBA) derivatives have been identified as novel class of potent antibacterial agents targeting the bacterial cell division protein FtsZ. As one of isosteres for the amide group, 1,2,3-triazole can mimic the topological and electronic features of the amide, which has gained increasing attention in drug discovery. Based on these considerations, we prepared a series of 1H-1,2,3-triazole-containing 3-MBA analogues via isosteric replacement of the terminal amide with triazole, which had increased antibacterial activity. This study demonstrated the possibility of developing the 1H-1,2,3-triazole group as a terminal amide-mimetic element which was capable of both keeping and modulating amide-related bioactivity. Surprisingly, a different action mode of these new 1H-1,2,3-triazole-containing analogues was observed, which could open new opportunities for the development of antibacterial agents.
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Affiliation(s)
- Fangchao Bi
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, 44 West Culture Road, Jinan 250012, China
| | - Shengli Ji
- ReaLi Tide Biological Technology (Weihai) Co. Ltd., East Longhai Road & South Yangguang Road, Nanhai New District, Weihai 264207, China
| | - Henrietta Venter
- School of Pharmacy & Medical Sciences, Sansom Institute for Health Research, University of South Australia, GPO Box 2471, Adelaide 5001, Australia
| | - Jingru Liu
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, 44 West Culture Road, Jinan 250012, China
| | - Susan J Semple
- School of Pharmacy & Medical Sciences, Sansom Institute for Health Research, University of South Australia, GPO Box 2471, Adelaide 5001, Australia
| | - Shutao Ma
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, 44 West Culture Road, Jinan 250012, China.
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5
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Chan KF, Sun N, Yan SC, Wong ILK, Lui HK, Cheung KC, Yuan J, Chan FY, Zheng Z, Chan EWC, Chen S, Leung YC, Chan TH, Wong KY. Efficient Synthesis of Amine-Linked 2,4,6-Trisubstituted Pyrimidines as a New Class of Bacterial FtsZ Inhibitors. ACS OMEGA 2017; 2:7281-7292. [PMID: 30023544 PMCID: PMC6044853 DOI: 10.1021/acsomega.7b00701] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 09/12/2017] [Indexed: 06/08/2023]
Abstract
We have recently identified a new class of filamenting temperature-sensitive mutant Z (FtsZ)-interacting compounds that possess a 2,4,6-trisubstituted pyrimidine-quinuclidine scaffold with moderate antibacterial activity. Employing this scaffold as a molecular template, a compound library of amine-linked 2,4,6-trisubstituted pyrimidines with 99 candidates was successfully established by employing an efficient convergent synthesis designed to explore their structure-activity relationship. The results of minimum inhibitory concentration (MIC) assay against Staphylococcus aureus strains and cytotoxicity assay against the mouse L929 cell line identified those compounds with potent antistaphylococcal properties (MIC ranges from 3 to 8 μg/mL) and some extent of cytotoxicity against normal cells (IC50 ranges from 6 to 27 μM). Importantly, three compounds also exhibited potent antibacterial activities against nine clinically isolated methicillin-resistant S. aureus (MRSA) strains. One of the compounds, 14av_amine16, exhibited low spontaneous frequency of resistance, low toxicity against Galleria mellonella larvae, and the ability to rescue G. mellonella larvae (20% survival rate at a dosage of 100 mg/kg) infected with a lethal dose of MRSA ATCC 43300 strain. Biological characterization of compound 14av_amine16 by saturation transfer difference NMR, light scattering assay, and guanosine triphosphatase hydrolysis assay with purified S. aureus FtsZ protein verified that it interacted with the FtsZ protein. Such a property of FtsZ inhibitors was further confirmed by observing iconic filamentous cell phenotype and mislocalization of the Z-ring formation of Bacillus subtilis. Taken together, these 2,4,6-trisubstituted pyrimidine derivatives represent a novel scaffold of S. aureus FtsZ inhibitors.
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Affiliation(s)
- Kin-Fai Chan
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Ning Sun
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Siu-Cheong Yan
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Iris L K Wong
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Hok-Kiu Lui
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Kwan-Choi Cheung
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Jian Yuan
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Fung-Yi Chan
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Zhiwei Zheng
- Shenzhen Key Laboratory for Food Biological Safety Control, Food Safety and Technology Research Centre, The Hong Kong PolyU Shenzhen Research Institute, Shenzhen 518057, China
| | - Edward W C Chan
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Sheng Chen
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
- Shenzhen Key Laboratory for Food Biological Safety Control, Food Safety and Technology Research Centre, The Hong Kong PolyU Shenzhen Research Institute, Shenzhen 518057, China
| | - Yun-Chung Leung
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Tak Hang Chan
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
- Department of Chemistry, McGill University, Montreal, Quebec H3A 2K6, Canada
| | - Kwok-Yin Wong
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
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6
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Hu Z, Zhang S, Zhou W, Ma X, Xiang G. Synthesis and antibacterial activity of 3-benzylamide derivatives as FtsZ inhibitors. Bioorg Med Chem Lett 2017; 27:1854-1858. [DOI: 10.1016/j.bmcl.2017.02.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 02/05/2017] [Accepted: 02/15/2017] [Indexed: 11/26/2022]
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7
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Qian XY, Li SQ, Song J, Xu HC. TEMPO-Catalyzed Electrochemical C–H Thiolation: Synthesis of Benzothiazoles and Thiazolopyridines from Thioamides. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00426] [Citation(s) in RCA: 153] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiang-Yang Qian
- iChEM,
State Key Laboratory of Physical Chemistry of Solid Surfaces, and
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Shu-Qi Li
- iChEM,
State Key Laboratory of Physical Chemistry of Solid Surfaces, and
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Jinshuai Song
- Fujian
Institute of Research on Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
| | - Hai-Chao Xu
- iChEM,
State Key Laboratory of Physical Chemistry of Solid Surfaces, and
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
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8
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Duggirala S, Napoleon JV, Nankar RP, Senu Adeeba V, Manheri MK, Doble M. FtsZ inhibition and redox modulation with one chemical scaffold: Potential use of dihydroquinolines against mycobacteria. Eur J Med Chem 2016; 123:557-567. [PMID: 27517804 DOI: 10.1016/j.ejmech.2016.07.058] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 07/20/2016] [Accepted: 07/23/2016] [Indexed: 12/15/2022]
Abstract
The dual effect of FtsZ inhibition and oxidative stress by a group of 1,2-dihydroquinolines that culminate in bactericidal effect on mycobacterium strains is demonstrated. They inhibited the non-pathogenic Mycobacterium smegmatis mc(2) 155 with MIC as low as 0.9 μg/mL and induced filamentation. Detailed studies revealed their ability to inhibit polymerization and GTPase activity of MtbFtsZ (Mycobacterial filamentous temperature sensitive Z) with an IC50 value of ∼40 μM. In addition to such target specific effects, these compounds exerted a global cellular effect by causing redox-imbalance that was evident from overproduction of ROS in treated cells. Such multi-targeting effect with one chemical scaffold has considerable significance in this era of emerging drug resistance and could offer promise in the development of new therapeutic agents against tuberculosis.
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Affiliation(s)
- Sridevi Duggirala
- Bioengineering and Drug Design Lab, Department of Biotechnology, Indian Institute of Technology Madras, Chennai, 600 036, India
| | - John Victor Napoleon
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, India
| | - Rakesh P Nankar
- Bioengineering and Drug Design Lab, Department of Biotechnology, Indian Institute of Technology Madras, Chennai, 600 036, India
| | - V Senu Adeeba
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, India
| | | | - Mukesh Doble
- Bioengineering and Drug Design Lab, Department of Biotechnology, Indian Institute of Technology Madras, Chennai, 600 036, India.
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9
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Straniero V, Pallavicini M, Chiodini G, Zanotto C, Volontè L, Radaelli A, Bolchi C, Fumagalli L, Sanguinetti M, Menchinelli G, Delogu G, Battah B, De Giuli Morghen C, Valoti E. 3-(Benzodioxan-2-ylmethoxy)-2,6-difluorobenzamides bearing hydrophobic substituents at the 7-position of the benzodioxane nucleus potently inhibit methicillin-resistant Sa and Mtb cell division. Eur J Med Chem 2016; 120:227-43. [PMID: 27191617 DOI: 10.1016/j.ejmech.2016.03.068] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 03/09/2016] [Accepted: 03/25/2016] [Indexed: 11/26/2022]
Abstract
Lipophilic substituents at benzodioxane C (7) of 3-(benzodioxan-2-ylmethoxy)-2,6-difluorobenzamide improve the antibacterial activity against methicillin-resistant Staphylococcus aureus strains to MIC values in the range of 0.2-2.5 μg/mL, whereas hydrophilic substituents at the same position and modifications at the benzodioxane substructure, excepting for replacement with 2-cromanyl, are deleterious. Some of the lead compounds also exhibit good activity against Mtb. Parallel SARs to those of 3-(2-benzothiazol-2-ylmethoxy)-2,6-difluorobenzamide, well known FtsZ inhibitor, and cells alterations typical of FtsZ inhibition indicate such a protein as the target of these potent antibacterial benzodioxane-benzamides.
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Affiliation(s)
- Valentina Straniero
- Dipartimento di Scienze Farmaceutiche, Università di Milano, via Mangiagalli 25, I-20133 Milano, Italy
| | - Marco Pallavicini
- Dipartimento di Scienze Farmaceutiche, Università di Milano, via Mangiagalli 25, I-20133 Milano, Italy
| | - Giuseppe Chiodini
- Dipartimento di Scienze Farmaceutiche, Università di Milano, via Mangiagalli 25, I-20133 Milano, Italy
| | - Carlo Zanotto
- Department of Medical Biothechnologies and Translational Medicine, Università di Milano, via Vanvitelli 32, I-20129 Milano, Italy
| | - Luca Volontè
- Department of Medical Biothechnologies and Translational Medicine, Università di Milano, via Vanvitelli 32, I-20129 Milano, Italy
| | - Antonia Radaelli
- Department of Pharmacological and Biomolecular Sciences, Università di Milano, via Balzaretti 9, I-2013 Milano, Italy; CNR Institute of Neurosciences, Cellular and Molecular Pharmacology Section, Università di Milano, via Vanvitelli 32, I-20129 Milano, Italy
| | - Cristiano Bolchi
- Dipartimento di Scienze Farmaceutiche, Università di Milano, via Mangiagalli 25, I-20133 Milano, Italy
| | - Laura Fumagalli
- Dipartimento di Scienze Farmaceutiche, Università di Milano, via Mangiagalli 25, I-20133 Milano, Italy
| | - Maurizio Sanguinetti
- Institute of Microbiology, Università Cattolica del Sacro Cuore, largo Gemelli 8, I-00168 Rome, Italy
| | - Giulia Menchinelli
- Institute of Microbiology, Università Cattolica del Sacro Cuore, largo Gemelli 8, I-00168 Rome, Italy
| | - Giovanni Delogu
- Institute of Microbiology, Università Cattolica del Sacro Cuore, largo Gemelli 8, I-00168 Rome, Italy
| | - Basem Battah
- Institute of Microbiology, Università Cattolica del Sacro Cuore, largo Gemelli 8, I-00168 Rome, Italy
| | - Carlo De Giuli Morghen
- Department of Medical Biothechnologies and Translational Medicine, Università di Milano, via Vanvitelli 32, I-20129 Milano, Italy; CNR Institute of Neurosciences, Cellular and Molecular Pharmacology Section, Università di Milano, via Vanvitelli 32, I-20129 Milano, Italy
| | - Ermanno Valoti
- Dipartimento di Scienze Farmaceutiche, Università di Milano, via Mangiagalli 25, I-20133 Milano, Italy.
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10
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TXA709, an FtsZ-Targeting Benzamide Prodrug with Improved Pharmacokinetics and Enhanced In Vivo Efficacy against Methicillin-Resistant Staphylococcus aureus. Antimicrob Agents Chemother 2015; 59:4845-55. [PMID: 26033735 DOI: 10.1128/aac.00708-15] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 05/27/2015] [Indexed: 01/07/2023] Open
Abstract
The clinical development of FtsZ-targeting benzamide compounds like PC190723 has been limited by poor drug-like and pharmacokinetic properties. Development of prodrugs of PC190723 (e.g., TXY541) resulted in enhanced pharmaceutical properties, which, in turn, led to improved intravenous efficacy as well as the first demonstration of oral efficacy in vivo against both methicillin-sensitive Staphylococcus aureus (MSSA) and methicillin-resistant S. aureus (MRSA). Despite being efficacious in vivo, TXY541 still suffered from suboptimal pharmacokinetics and the requirement of high efficacious doses. We describe here the design of a new prodrug (TXA709) in which the Cl group on the pyridyl ring has been replaced with a CF3 functionality that is resistant to metabolic attack. As a result of this enhanced metabolic stability, the product of the TXA709 prodrug (TXA707) is associated with improved pharmacokinetic properties (a 6.5-fold-longer half-life and a 3-fold-greater oral bioavailability) and superior in vivo antistaphylococcal efficacy relative to PC190723. We validate FtsZ as the antibacterial target of TXA707 and demonstrate that the compound retains potent bactericidal activity against S. aureus strains resistant to the current standard-of-care drugs vancomycin, daptomycin, and linezolid. These collective properties, coupled with minimal observed toxicity to mammalian cells, establish the prodrug TXA709 as an antistaphylococcal agent worthy of clinical development.
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11
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Chiodini G, Pallavicini M, Zanotto C, Bissa M, Radaelli A, Straniero V, Bolchi C, Fumagalli L, Ruggeri P, De Giuli Morghen C, Valoti E. Benzodioxane-benzamides as new bacterial cell division inhibitors. Eur J Med Chem 2014; 89:252-65. [PMID: 25462242 DOI: 10.1016/j.ejmech.2014.09.100] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2014] [Revised: 09/09/2014] [Accepted: 09/15/2014] [Indexed: 11/30/2022]
Abstract
A SAR study was performed on 3-substituted 2,6-difluorobenzamides, known inhibitors of the essential bacterial cell division protein FtsZ, through a series of modifications first of 2,6-difluoro-3-nonyloxybenzamide and then of its 3-pyridothiazolylmethoxy analogue PC190723. The study led to the identification of chiral 2,6-difluorobenzamides bearing 1,4-benzodioxane-2-methyl residue at the 3-position as potent antistaphylococcal compounds.
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Affiliation(s)
- Giuseppe Chiodini
- Dipartimento di Scienze Farmaceutiche, Università di Milano, Via Mangiagalli 25, I-20133 Milano, Italy
| | - Marco Pallavicini
- Dipartimento di Scienze Farmaceutiche, Università di Milano, Via Mangiagalli 25, I-20133 Milano, Italy
| | - Carlo Zanotto
- Department of Medical Biothechnologies and Translational Medicine, Università di Milano, Via Vanvitelli 32, I-20129 Milano, Italy
| | - Massimiliano Bissa
- Department of Pharmacological and Biomolecular Sciences, Università di Milano, Via Balzaretti 9, I-2013 Milano, Italy
| | - Antonia Radaelli
- Department of Pharmacological and Biomolecular Sciences, Università di Milano, Via Balzaretti 9, I-2013 Milano, Italy; CNR Institute of Neurosciences, Cellular and Molecular Pharmacology Section, Università di Milano, Via Vanvitelli 32, I-20129 Milano, Italy
| | - Valentina Straniero
- Dipartimento di Scienze Farmaceutiche, Università di Milano, Via Mangiagalli 25, I-20133 Milano, Italy
| | - Cristiano Bolchi
- Dipartimento di Scienze Farmaceutiche, Università di Milano, Via Mangiagalli 25, I-20133 Milano, Italy
| | - Laura Fumagalli
- Dipartimento di Scienze Farmaceutiche, Università di Milano, Via Mangiagalli 25, I-20133 Milano, Italy
| | - Paola Ruggeri
- Dipartimento di Scienze Farmaceutiche, Università di Milano, Via Mangiagalli 25, I-20133 Milano, Italy
| | - Carlo De Giuli Morghen
- Department of Medical Biothechnologies and Translational Medicine, Università di Milano, Via Vanvitelli 32, I-20129 Milano, Italy; CNR Institute of Neurosciences, Cellular and Molecular Pharmacology Section, Università di Milano, Via Vanvitelli 32, I-20129 Milano, Italy
| | - Ermanno Valoti
- Dipartimento di Scienze Farmaceutiche, Università di Milano, Via Mangiagalli 25, I-20133 Milano, Italy.
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12
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Inhibition of RND-type efflux pumps confers the FtsZ-directed prodrug TXY436 with activity against Gram-negative bacteria. Biochem Pharmacol 2014; 89:321-8. [DOI: 10.1016/j.bcp.2014.03.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 02/07/2014] [Accepted: 03/07/2014] [Indexed: 02/03/2023]
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13
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Kaul M, Mark L, Zhang Y, Parhi AK, LaVoie EJ, Pilch DS. Pharmacokinetics and in vivo antistaphylococcal efficacy of TXY541, a 1-methylpiperidine-4-carboxamide prodrug of PC190723. Biochem Pharmacol 2013; 86:1699-707. [PMID: 24148278 DOI: 10.1016/j.bcp.2013.10.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Revised: 10/11/2013] [Accepted: 10/14/2013] [Indexed: 12/31/2022]
Abstract
The benzamide derivative PC190723 was among the first of a promising new class of FtsZ-directed antibacterial agents to be identified that exhibit potent antistaphylococcal activity. However, the compound is associated with poor drug-like properties. As part of an ongoing effort to develop FtsZ-targeting antibacterial agents with increased potential for clinical utility, we describe herein the pharmacodynamics, pharmacokinetics, in vivo antistaphylococcal efficacy, and mammalian cytotoxicity of TXY541, a novel 1-methylpiperidine-4-carboxamide prodrug of PC190723. TXY541 was found to be 143-times more soluble than PC190723 in an aqueous acidic vehicle (10mM citrate, pH 2.6) suitable for both oral and intravenous in vivo administration. In staphylococcal growth media, TXY541 converts to PC190723 with a half-life of approximately 8h. In 100% mouse serum, the TXY541-to-PC190723 conversion was much more rapid (with a half-life of approximately 3min), suggesting that the conversion of the prodrug in serum is predominantly enzyme-catalyzed. Pharmacokinetic analysis of both orally and intravenously administered TXY541 in mice yielded a half-life for the PC190723 conversion product of 0.56h and an oral bioavailability of 29.6%. Whether administered orally or intravenously, TXY541 was found to be efficacious in vivo in mouse models of systemic infection with both methicillin-sensitive and methicillin-resistant S. aureus. Toxicological assessment of TXY541 against mammalian cells revealed minimal detectable cytotoxicity. The results presented here highlight TXY541 as a potential therapeutic agent that warrants further pre-clinical development.
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Affiliation(s)
- Malvika Kaul
- Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, Piscataway, NJ 08854-5635, United States
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14
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An FtsZ-targeting prodrug with oral antistaphylococcal efficacy in vivo. Antimicrob Agents Chemother 2013; 57:5860-9. [PMID: 24041882 DOI: 10.1128/aac.01016-13] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The bacterial cell division protein FtsZ represents a novel antibiotic target that has yet to be exploited clinically. The benzamide PC190723 was among the first FtsZ-targeting compounds to exhibit in vivo efficacy in a murine infection model system. Despite its initial promise, the poor formulation properties of the compound have limited its potential for clinical development. We describe here the development of an N-Mannich base derivative of PC190723 with enhanced drug-like properties and oral in vivo efficacy. The N-Mannich base derivative (TXY436) is ∼100-fold more soluble than PC190723 in an acidic aqueous vehicle (10 mM citrate, pH 2.6) suitable for oral in vivo administration. At physiological pH (7.4), TXY436 acts as a prodrug, converting to PC190723 with a conversion half-life of 18.2 ± 1.6 min. Pharmacokinetic analysis following intravenous administration of TXY436 into mice yielded elimination half-lives of 0.26 and 0.96 h for the TXY436 prodrug and its PC190723 product, respectively. In addition, TXY436 was found to be orally bioavailable and associated with significant extravascular distribution. Using a mouse model of systemic infection with methicillin-sensitive Staphylococcus aureus or methicillin-resistant S. aureus, we show that TXY436 is efficacious in vivo upon oral administration. In contrast, the oral administration of PC190723 was not efficacious. Mammalian cytotoxicity studies of TXY436 using Vero cells revealed an absence of toxicity up to compound concentrations at least 64 times greater than those associated with antistaphylococcal activity. These collective properties make TXY436 a worthy candidate for further investigation as a clinically useful agent for the treatment of staphylococcal infections.
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15
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Kaul M, Zhang Y, Parhi AK, Lavoie EJ, Tuske S, Arnold E, Kerrigan JE, Pilch DS. Enterococcal and streptococcal resistance to PC190723 and related compounds: molecular insights from a FtsZ mutational analysis. Biochimie 2013; 95:1880-7. [PMID: 23806423 DOI: 10.1016/j.biochi.2013.06.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Accepted: 06/14/2013] [Indexed: 10/26/2022]
Abstract
New antibiotics with novel mechanisms of action are urgently needed to overcome the growing bacterial resistance problem faced by clinicians today. PC190723 and related compounds represent a promising new class of antibacterial compounds that target the essential bacterial cell division protein FtsZ. While this family of compounds exhibits potent antistaphylococcal activity, they have poor activity against enterococci and streptococci. The studies described herein are aimed at investigating the molecular basis of the enterococcal and streptococcal resistance to this family of compounds. We show that the poor activity of the compounds against enterococci and streptococci correlates with a correspondingly weak impact of the compounds on the self-polymerization of the FtsZ proteins from those bacteria. In addition, computational and mutational studies identify two key FtsZ residues (E34 and R308) as being important determinants of enterococcal and streptococcal resistance to the PC190723-type class of compounds.
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Affiliation(s)
- Malvika Kaul
- Department of Pharmacology, University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School, Piscataway, NJ 08854-5635, USA
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16
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Anderson DE, Kim MB, Moore JT, O’Brien TE, Sorto NA, Grove CI, Lackner LL, Ames JB, Shaw JT. Comparison of small molecule inhibitors of the bacterial cell division protein FtsZ and identification of a reliable cross-species inhibitor. ACS Chem Biol 2012; 7:1918-28. [PMID: 22958099 DOI: 10.1021/cb300340j] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
FtsZ is a guanosine triphosphatase (GTPase) that mediates cytokinesis in bacteria. FtsZ is homologous in structure to eukaryotic tubulin and polymerizes in a similar head-to-tail fashion. The study of tubulin's function in eukaryotic cells has benefited greatly from specific and potent small molecule inhibitors, including colchicine and taxol. Although many small molecule inhibitors of FtsZ have been reported, none has emerged as a generally useful probe for modulating bacterial cell division. With the goal of establishing a useful and reliable small molecule inhibitor of FtsZ, a broad biochemical cross-comparison of reported FtsZ inhibitors was undertaken. Several of these molecules, including phenolic natural products, are unselective inhibitors that seem to derive their activity from the formation of microscopic colloids or aggregates. Other compounds, including the natural product viriditoxin and the drug development candidate PC190723, exhibit no inhibition of GTPase activity using protocols in this work or under published conditions. Of the compounds studied, only zantrin Z3 exhibits good levels of inhibition, maintains activity under conditions that disrupt small molecule aggregates, and provides a platform for exploration of structure-activity relationships (SAR). Preliminary SAR studies have identified slight modifications to the two side chains of this structure that modulate the inhibitory activity of zantrin Z3. Collectively, these studies will help focus future investigations toward the establishment of probes for FtsZ that fill the roles of colchicine and taxol in studies of tubulin.
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Affiliation(s)
- David E. Anderson
- Department of Chemistry, University of California, One Shields Ave, Davis, California 95616,
United States
| | - Michelle B. Kim
- Department of Chemistry, University of California, One Shields Ave, Davis, California 95616,
United States
| | - Jared T. Moore
- Department of Chemistry, University of California, One Shields Ave, Davis, California 95616,
United States
| | - Terrence E. O’Brien
- Department of Chemistry, University of California, One Shields Ave, Davis, California 95616,
United States
| | - Nohemy A. Sorto
- Department of Chemistry, University of California, One Shields Ave, Davis, California 95616,
United States
| | - Charles I. Grove
- Department of Chemistry, University of California, One Shields Ave, Davis, California 95616,
United States
| | - Laura L. Lackner
- Department of Chemistry, University of California, One Shields Ave, Davis, California 95616,
United States
| | - James B. Ames
- Department of Chemistry, University of California, One Shields Ave, Davis, California 95616,
United States
| | - Jared T. Shaw
- Department of Chemistry, University of California, One Shields Ave, Davis, California 95616,
United States
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17
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Ding ZC, Ma X, Zhou W. Convenient and Practical Synthesis of 6-Chloro-2-(chloromethyl)-thiazolo[5,4-b]pyridine. SYNTHETIC COMMUN 2012. [DOI: 10.1080/00397911.2011.566408] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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18
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Foss MH, Eun YJ, Grove CI, Pauw DA, Sorto NA, Rensvold JW, Pagliarini DJ, Shaw JT, Weibel DB. Inhibitors of bacterial tubulin target bacterial membranes in vivo.. MEDCHEMCOMM 2012; 4:112-119. [PMID: 23539337 DOI: 10.1039/c2md20127e] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
FtsZ is a homolog of eukaryotic tubulin that is widely conserved among bacteria and coordinates the assembly of the cell division machinery. FtsZ plays a central role in cell replication and is a target of interest for antibiotic development. Several FtsZ inhibitors have been reported. We characterized the mechanism of these compounds in bacteria and found that many of them disrupt the localization of membrane-associated proteins, including FtsZ, by reducing the transmembrane potential or perturbing membrane permeability. We tested whether the reported phenotypes of a broad collection of FtsZ inhibitors disrupt the transmembrane potential in Bacillus subtilis strain 168. Using a combination of flow cytometry and microscopy, we found that zantrin Z1, cinnamaldehyde, totarol, sanguinarine, and viriditoxin decreased the B. subtilis transmembrane potential or perturbed membrane permeability, and influenced the localization of the membrane-associated, division protein MinD. These studies demonstrate that small molecules that disrupt membrane function in bacterial cells produce phenotypes that are similar to the inhibition of proteins associated with membranes in vivo, including bacterial cytoskeleton homologs, such as FtsZ. The results provide a new dimension for consideration in the design and testing of inhibitors of bacterial targets that are membrane-associated and provide additional insight into the structural characteristics of antibiotics that disrupt the membrane.
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Affiliation(s)
- Marie H Foss
- Departments of Biochemistry and Biomedical Engineering, 433 Babcock Drive, Madison, WI 53706, USA. Tel: +1 (608) 890-1342
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19
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Hou S, Wieczorek SA, Kaminski TS, Ziebacz N, Tabaka M, Sorto NA, Foss MH, Shaw JT, Thanbichler M, Weibel DB, Nieznanski K, Holyst R, Garstecki P. Characterization of Caulobacter crescentus FtsZ protein using dynamic light scattering. J Biol Chem 2012; 287:23878-86. [PMID: 22573335 DOI: 10.1074/jbc.m111.309492] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The self-assembly of the tubulin homologue FtsZ at the mid-cell is a critical step in bacterial cell division. We introduce dynamic light scattering (DLS) spectroscopy as a new method to study the polymerization kinetics of FtsZ in solution. Analysis of the DLS data indicates that the FtsZ polymers are remarkably monodisperse in length, independent of the concentrations of GTP, GDP, and FtsZ monomers. Measurements of the diffusion coefficient of the polymers demonstrate that their length is remarkably stable until the free GTP is consumed. We estimated the mean size of the FtsZ polymers within this interval of stable length to be between 9 and 18 monomers. The rates of FtsZ polymerization and depolymerization are likely influenced by the concentration of GDP, as the repeated addition of GTP to FtsZ increased the rate of polymerization and slowed down depolymerization. Increasing the FtsZ concentration did not change the size of FtsZ polymers; however, it increased the rate of the depolymerization reaction by depleting free GTP. Using transmission electron microscopy we observed that FtsZ forms linear polymers in solutions which rapidly convert to large bundles upon contact with surfaces at time scales as short as several seconds. Finally, the best studied small molecule that binds to FtsZ, PC190723, had no stabilizing effect on Caulobacter crescentus FtsZ filaments in vitro, which complements previous studies with Escherichia coli FtsZ and confirms that this class of small molecules binds Gram-negative FtsZ weakly.
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Affiliation(s)
- Sen Hou
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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20
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Schaffner-Barbero C, Martín-Fontecha M, Chacón P, Andreu JM. Targeting the assembly of bacterial cell division protein FtsZ with small molecules. ACS Chem Biol 2012; 7:269-77. [PMID: 22047077 DOI: 10.1021/cb2003626] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
FtsZ is the key protein of bacterial cell division and an emergent target for new antibiotics. It is a filament-forming GTPase and a structural homologue of eukaryotic tubulin. A number of FtsZ-interacting compounds have been reported, some of which have powerful antibacterial activity. Here we review recent advances and new approaches in modulating FtsZ assembly with small molecules. This includes analyzing their chemical features, binding sites, mechanisms of action, the methods employed, and computational insights, aimed at a better understanding of their molecular recognition by FtsZ and at rational antibiotic design.
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Affiliation(s)
- Claudia Schaffner-Barbero
- Tubulins and
FtsZ, Centro de
Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain
| | - Mar Martín-Fontecha
- Medicinal Chemistry, Dept. Química
Orgánica I, Facultad de Ciencias Químicas, UCM, Avda. Complutense s/n, 28040 Madrid, Spain
| | - Pablo Chacón
- Structural Bioinformatics, Instituto
de Química Física Rocasolano, CSIC, Serrano 119, 28006 Madrid, Spain
| | - José M. Andreu
- Tubulins and
FtsZ, Centro de
Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain
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