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Schum D, Elsen FAV, Ruddell S, Schorpp K, Junca H, Müsken M, Chen SY, Fiedler MK, Pickl T, Pieper DH, Hadian K, Zacharias M, Sieber SA. Screening Privileged Alkyl Guanidinium Motifs under Host-Mimicking Conditions Reveals a Novel Antibiotic with an Unconventional Mode of Action. JACS AU 2024; 4:3125-3134. [PMID: 39211621 PMCID: PMC11350587 DOI: 10.1021/jacsau.4c00449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Revised: 06/20/2024] [Accepted: 06/24/2024] [Indexed: 09/04/2024]
Abstract
Screening large molecule libraries against pathogenic bacteria is often challenged by a low hit rate due to limited uptake, underrepresentation of antibiotic structural motifs, and assays that do not resemble the infection conditions. To address these limitations, we present a screen of a focused library of alkyl guanidinium compounds, a structural motif associated with antibiotic activity and enhanced uptake, under host-mimicking infection conditions against a panel of disease-associated bacteria. Several hit molecules were identified with activities against Gram-positive and Gram-negative bacteria, highlighting the fidelity of the general concept. We selected one compound (L15) for in-depth mode of action studies that exhibited bactericidal activity against methicillin-resistant Staphylococcus aureus USA300 with a minimum inhibitory concentration of 1.5 μM. Structure-activity relationship studies confirmed the necessity of the guanidinium motif for antibiotic activity. The mode of action was investigated using affinity-based protein profiling with an L15 probe and identified the signal peptidase IB (SpsB) as the most promising hit. Validation by activity assays, binding site identification, docking, and molecular dynamics simulations demonstrated SpsB activation by L15, a recently described mechanism leading to the dysregulation of protein secretion and cell death. Overall, this study highlights the need for unconventional screening strategies to identify novel antibiotics.
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Affiliation(s)
- Dominik Schum
- TUM
School of Natural Sciences, Department of Bioscience, Chair of Organic Chemistry II, Center for Functional Protein Assemblies
(CPA), Technical University of Munich (TUM), Ernst-Otto-Fischer Str. 8, Garching 85748, Germany
| | - Franziska A. V. Elsen
- TUM
School of Natural Sciences, Department of Bioscience, Chair of Organic Chemistry II, Center for Functional Protein Assemblies
(CPA), Technical University of Munich (TUM), Ernst-Otto-Fischer Str. 8, Garching 85748, Germany
| | - Stuart Ruddell
- TUM
School of Natural Sciences, Department of Bioscience, Chair of Organic Chemistry II, Center for Functional Protein Assemblies
(CPA), Technical University of Munich (TUM), Ernst-Otto-Fischer Str. 8, Garching 85748, Germany
| | - Kenji Schorpp
- Helmholtz
Zentrum München, Research Unit Signaling and Translation, Ingolstädter Landstraße
1, Neuherberg, Munich 85764, Germany
| | - Howard Junca
- Helmholtz
Centre for Infection Research, Microbial Interactions and Processes, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Mathias Müsken
- Helmholtz
Centre for Infection Research, Central Facility for Microscopy, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Shu-Yu Chen
- TUM
School of Natural Sciences, Department of Bioscience, Theoretical Biophysics (T38), Center for Functional Protein Assemblies
(CPA), Technical University of Munich (TUM), Ernst-Otto-Fischer Str. 8, Garching 85748, Germany
| | - Michaela K. Fiedler
- TUM
School of Natural Sciences, Department of Bioscience, Chair of Organic Chemistry II, Center for Functional Protein Assemblies
(CPA), Technical University of Munich (TUM), Ernst-Otto-Fischer Str. 8, Garching 85748, Germany
| | - Thomas Pickl
- TUM School
of Natural Sciences, Department of Chemistry, Catalysis Research Center (CRC), Technical University of Munich (TUM), Ernst-Otto-Fischer Str. 1, Garching 85748, Germany
| | - Dietmar H. Pieper
- Helmholtz
Centre for Infection Research, Microbial Interactions and Processes, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Kamyar Hadian
- Helmholtz
Zentrum München, Research Unit Signaling and Translation, Ingolstädter Landstraße
1, Neuherberg, Munich 85764, Germany
| | - Martin Zacharias
- TUM
School of Natural Sciences, Department of Bioscience, Theoretical Biophysics (T38), Center for Functional Protein Assemblies
(CPA), Technical University of Munich (TUM), Ernst-Otto-Fischer Str. 8, Garching 85748, Germany
| | - Stephan A. Sieber
- TUM
School of Natural Sciences, Department of Bioscience, Chair of Organic Chemistry II, Center for Functional Protein Assemblies
(CPA), Technical University of Munich (TUM), Ernst-Otto-Fischer Str. 8, Garching 85748, Germany
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Zheng CX, Liao YT, Wang HX, Yang C, Li D, Shao LD. Synthesis of C3'-Foused Aryl/Penta-1,4-Dien-3-One/Amine Hybrids as HSP90C-Terminal Inhibitors. Chem Biodivers 2024; 21:e202400870. [PMID: 38842484 DOI: 10.1002/cbdv.202400870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2024] [Revised: 06/03/2024] [Accepted: 06/06/2024] [Indexed: 06/07/2024]
Abstract
24 C3'-focused hybrids of aryl/penta-1,4-dien-3-one/amine (APDA) were designed and synthesized. Of these hybrids, 2 n demonstrated improved antiproliferative effects on HER2-positive breast cancer cells (SKBr3 and BT474) and triple-negative breast cancer (TNBC) cells (MDA-MB-231 and MDA-MB-468) with IC50 values ranging from 7.45 to 10.75 μM, but less toxicity to normal breast cells MCF-10A than the first generation of hybrid 1. Additionally, 2 n retained its ability to inhibit HSP90C-terminus, leading to the degradation of HSP90 client proteins HER2, EGFR, pAKT, AKT, and CDK4, without inducing a heat-shock response. Notably, 2 n also demonstrated improved thermostability compared to 1 and maintained in vitro metabolic stability in simulated intestinal fluid. These findings will provide a scientific basis for developing HSP90C-terminal inhibitors in the future.
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Affiliation(s)
- Chun-Xia Zheng
- Yunnan Key Laboratory of Southern Medicinal Resources, School of Chinese Materia Medica, Yunnan University of Chinese Medicine Kunming 650500
| | - Yu-Ting Liao
- Yunnan Key Laboratory of Southern Medicinal Resources, School of Chinese Materia Medica, Yunnan University of Chinese Medicine Kunming 650500
| | - Hua-Xiang Wang
- Yunnan Key Laboratory of Southern Medicinal Resources, School of Chinese Materia Medica, Yunnan University of Chinese Medicine Kunming 650500
| | - Chen Yang
- Yunnan Key Laboratory of Southern Medicinal Resources, School of Chinese Materia Medica, Yunnan University of Chinese Medicine Kunming 650500
| | - Dashan Li
- Yunnan Key Laboratory of Southern Medicinal Resources, School of Chinese Materia Medica, Yunnan University of Chinese Medicine Kunming 650500
| | - Li-Dong Shao
- Yunnan Key Laboratory of Southern Medicinal Resources, School of Chinese Materia Medica, Yunnan University of Chinese Medicine Kunming 650500
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Sun N, Zhi Z, Xiao T, Deng X, He T, Dong W, Feng S, Chen S, Wong WL, Yuan W. The study of honokiol as a natural product-based antimicrobial agent and its potential interaction with FtsZ protein. Front Microbiol 2024; 15:1361508. [PMID: 39104591 PMCID: PMC11298477 DOI: 10.3389/fmicb.2024.1361508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Accepted: 07/10/2024] [Indexed: 08/07/2024] Open
Abstract
Multidrug resistant bacteria have been a global health threat currently and frontline clinical treatments for these infections are very limited. To develop potent antibacterial agents with new bactericidal mechanisms is thus needed urgently to address this critical antibiotic resistance challenge. Natural products are a treasure of small molecules with high bioactive and low toxicity. In the present study, we demonstrated that a natural compound, honokiol, showed potent antibacterial activity against a number of Gram-positive bacteria including MRSA and VRE. Moreover, honokiol in combination with clinically used β-lactam antibiotics exhibits strong synergistic antimicrobial effects against drug-resistant S. aureus strains. Biochemical studies further reveal that honokiol may disrupt the GTPase activity, FtsZ polymerization, cell division. These biological impacts induced by honokiol may ultimately cause bacterial cell death. The in vivo antibacterial activity of honokiol against S. aureus infection was also verified with a biological model of G. mellonella larvae. The in vivo results support that honokiol is low toxic against the larvae and effectively increases the survival rate of the larvae infected with S. aureus. These findings demonstrate the potential of honokiol for further structural advancement as a new class of antibacterial agents with high potency against multidrug-resistant bacteria.
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Affiliation(s)
- Ning Sun
- Guangzhou 11th People's Hospital, Guangzhou Cadre and Talent Health Management Center, Guangzhou, China
| | - Ziling Zhi
- Guangzhou Key Laboratory for Clinical Rapid Diagnosis and Early Warning of Infectious Diseases, King Med School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
| | - Ting Xiao
- Guangzhou 11th People's Hospital, Guangzhou Cadre and Talent Health Management Center, Guangzhou, China
| | - Xin Deng
- Guangzhou 11th People's Hospital, Guangzhou Cadre and Talent Health Management Center, Guangzhou, China
| | - Tenghui He
- Guangzhou 11th People's Hospital, Guangzhou Cadre and Talent Health Management Center, Guangzhou, China
| | - Wanyang Dong
- Guangzhou Key Laboratory for Clinical Rapid Diagnosis and Early Warning of Infectious Diseases, King Med School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
| | - Shuyi Feng
- Guangzhou 11th People's Hospital, Guangzhou Cadre and Talent Health Management Center, Guangzhou, China
| | - Sisi Chen
- Guangzhou Key Laboratory for Clinical Rapid Diagnosis and Early Warning of Infectious Diseases, King Med School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
| | - Wing-Leung Wong
- State Key Laboratory of Chemical Biology and Drug Discovery, and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China
| | - Wenchang Yuan
- Guangzhou Key Laboratory for Clinical Rapid Diagnosis and Early Warning of Infectious Diseases, King Med School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, China
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4
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El-Remaily MAEAAA, Aboelez MO, Ezelarab HAA, Selim HMRM, Taha EA, Mohamed SK, Soliman AM, Abdallah MS, Fawy MA, Hassany MA, Ahmed N, Alsaggaf AT, El Hamd MA, Kamel MS. Guanidine dicycloamine-based analogs: green chemistry synthesis, biological investigation, and molecular docking studies as promising antibacterial and antiglycation leads. Mol Divers 2024:10.1007/s11030-024-10816-w. [PMID: 38324159 DOI: 10.1007/s11030-024-10816-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Accepted: 01/21/2024] [Indexed: 02/08/2024]
Abstract
Dicyandiamide (DCD) reacted with amino acids 1a-f to produce biguanides 2 and 4 and guanidine pyrazolones 3, 5, 6, 7, and 8, according to the reaction. DCD exhibited the following reactions: imidodicarbonimidicdiamide 9, diazocan-2-ylguanidine 10, methyl biguanidylthion 11, N-carbamothioylimidodicarbonimidicdiamide 12, 2-guanidinebenzoimidazole 13a, 2-guanidinylbenzoxazole 13b, and 2-guanidinylbenzothiazol 13c. These reactions were triggered by 6-amino caproic acid, thioacetamide, thiourea, o-aminophenol, o-aminothiophenol, and anthranilic acid, respectively. Compound 2 had the least antimicrobial activity, while compound 13c demonstrated the most antibacterial impact against all bacterial strains. Furthermore, in terms of antiglycation efficacy (AGEs), 12, 11, and 7 were the most effective AGE cross-linking inhibitors. Eight and ten, which showed a considerable inhibition on cross-linking AGEs, come next. Compounds 4 and 6 on the other hand have shown the least suppression of AGE production. The most promising antiglycation scaffolds 8, 11, and 12 in the Human serum albumin (HAS) active site were shown to be able to adopt crucial binding interactions with important amino acids based on the results of in silico molecular docking. The most promising antiglycation compounds 8, 11, and 12 were also shown to have better hydrophilicity, acceptable lipophilicity, gastrointestinal tract absorption (GIT), and blood-brain barrier penetration qualities when their physicochemical properties were examined using the egg-boiled method.
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Affiliation(s)
| | - Moustafa O Aboelez
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Sohag University, Sohag, 82524, Egypt.
| | - Hend A A Ezelarab
- Department of Medicinal Chemistry, Faculty of Pharmacy, Minia University, Minia, 61519, Egypt
| | - Heba Mohammed Refat M Selim
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, AlMaarefa University, Diriyah, Riyadh, Saudi Arabia.
- Department of Microbiology and Immunology, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt.
| | - Enas A Taha
- Department of Chemistry, Faculty of Pharmacy, October 6 University, 6 October City, Giza, Egypt
| | - Shaaban K Mohamed
- The Environment and School of Healthcare Science, Manchester Metropolitan University, Manchester, UK
| | - Ahmed M Soliman
- Department of Chemistry, Faculty of Science, Sohag University, Sohag, 82524, Egypt
| | - Mohamed S Abdallah
- The Environment and School of Healthcare Science, Manchester Metropolitan University, Manchester, UK
| | - Mariam A Fawy
- Department of Zoology, Faculty of Science, South Valley University, Qena, 83523, Egypt
| | - Mohamed A Hassany
- Department of Internal Medicine, Faculty of Medicine, Aswan University, Aswan, Egypt
| | - Nessar Ahmed
- The Environment and School of Healthcare Science, Manchester Metropolitan University, Manchester, UK
| | | | - Mohamed A El Hamd
- Department of Pharmaceutical Chemistry, College of Pharmacy, Shaqra University, 11961, Shaqra, Saudi Arabia.
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, South Valley University, Qena, 83523, Egypt.
| | - Moumen S Kamel
- Department of Chemistry, Faculty of Science, Sohag University, Sohag, 82524, Egypt.
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5
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Zhidkov ME, Sidorova MA, Smirnova PA, Tryapkin OA, Kachanov AV, Kantemirov AV, Dezhenkova LG, Grammatikova NE, Isakova EB, Shchekotikhin AE, Pak MA, Styshova ON, Klimovich AA, Popov AM. Comparative Evaluation of the Antibacterial and Antitumor Activities of 9-Phenylfascaplysin and Its Analogs. Mar Drugs 2024; 22:53. [PMID: 38393024 PMCID: PMC10890213 DOI: 10.3390/md22020053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/14/2024] [Accepted: 01/18/2024] [Indexed: 02/25/2024] Open
Abstract
Based on the results of our own preliminary studies, the derivative of the marine alkaloid fascaplysin containing a phenyl substituent at C-9 was selected to evaluate the therapeutic potential in vivo and in vitro. It was shown that this compound has outstandingly high antimicrobial activity against Gram-positive bacteria, including antibiotic-resistant strains in vitro. The presence of a substituent at C-9 of the framework is of fundamental importance, since its replacement to neighboring positions leads to a sharp decrease in the selectivity of the antibacterial action, which indicates the presence of a specific therapeutic target in bacterial cells. On a model of the acute bacterial sepsis in mice, it was shown that the lead compound was more effective than the reference antibiotic vancomycin seven out of nine times. However, ED50 value for 9-phenylfascaplysin (7) was similar for the unsubstituted fascaplysin (1) in vivo, despite the former being significantly more active than the latter in vitro. Similarly, assessments of the anticancer activity of compound 7 against various variants of Ehrlich carcinoma in mice demonstrated its substantial efficacy. To conduct a structure-activity relationship (SAR) analysis and searches of new candidate compounds, we synthesized a series of analogs of 9-phenylfascaplysin with varying aryl substituents. However, these modifications led to the reduced aqueous solubility of fascaplysin derivatives or caused a loss of their antibacterial activity. As a result, further research is required to explore new avenues for enhancing its pharmacokinetic characteristics, the modification of the heterocyclic framework, and optimizing of treatment regimens to harness the remarkable antimicrobial potential of fascaplysin for practical usage.
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Affiliation(s)
- Maxim E. Zhidkov
- Department of Chemistry and Materials, Institute of High Technologies and Advanced Materials, FEFU Campus, Far Eastern Federal University, Ajax Bay 10, Russky Island, 690922 Vladivostok, Russia
| | - Maria A. Sidorova
- Department of Chemistry and Materials, Institute of High Technologies and Advanced Materials, FEFU Campus, Far Eastern Federal University, Ajax Bay 10, Russky Island, 690922 Vladivostok, Russia
| | - Polina A. Smirnova
- Department of Chemistry and Materials, Institute of High Technologies and Advanced Materials, FEFU Campus, Far Eastern Federal University, Ajax Bay 10, Russky Island, 690922 Vladivostok, Russia
| | - Oleg A. Tryapkin
- Department of Chemistry and Materials, Institute of High Technologies and Advanced Materials, FEFU Campus, Far Eastern Federal University, Ajax Bay 10, Russky Island, 690922 Vladivostok, Russia
| | - Andrey V. Kachanov
- Department of Chemistry and Materials, Institute of High Technologies and Advanced Materials, FEFU Campus, Far Eastern Federal University, Ajax Bay 10, Russky Island, 690922 Vladivostok, Russia
| | - Alexey V. Kantemirov
- Department of Chemistry and Materials, Institute of High Technologies and Advanced Materials, FEFU Campus, Far Eastern Federal University, Ajax Bay 10, Russky Island, 690922 Vladivostok, Russia
| | - Lyubov G. Dezhenkova
- Laboratory of Chemical Transformation of Antibiotics, Gause Institute of New Antibiotics, 119021 Moscow, Russia
| | - Natalia E. Grammatikova
- Laboratory of Chemical Transformation of Antibiotics, Gause Institute of New Antibiotics, 119021 Moscow, Russia
| | - Elena B. Isakova
- Laboratory of Chemical Transformation of Antibiotics, Gause Institute of New Antibiotics, 119021 Moscow, Russia
| | - Andrey E. Shchekotikhin
- Laboratory of Chemical Transformation of Antibiotics, Gause Institute of New Antibiotics, 119021 Moscow, Russia
| | - Marina A. Pak
- Department of Chemistry and Materials, Institute of High Technologies and Advanced Materials, FEFU Campus, Far Eastern Federal University, Ajax Bay 10, Russky Island, 690922 Vladivostok, Russia
| | - Olga N. Styshova
- Departments of Biotechnology and Marine Natural Compounds Chemistry, G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of The Russian Academy of Sciences, 690922 Vladivostok, Russia (A.A.K.)
| | - Anna A. Klimovich
- Departments of Biotechnology and Marine Natural Compounds Chemistry, G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of The Russian Academy of Sciences, 690922 Vladivostok, Russia (A.A.K.)
| | - Aleksandr M. Popov
- Departments of Biotechnology and Marine Natural Compounds Chemistry, G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of The Russian Academy of Sciences, 690922 Vladivostok, Russia (A.A.K.)
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6
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Kifayat S, Yele V, Ashames A, Sigalapalli DK, Bhandare RR, Shaik AB, Nasipireddy V, Sanapalli BKR. Filamentous temperature sensitive mutant Z: a putative target to combat antibacterial resistance. RSC Adv 2023; 13:11368-11384. [PMID: 37057268 PMCID: PMC10089256 DOI: 10.1039/d3ra00013c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Accepted: 03/28/2023] [Indexed: 04/15/2023] Open
Abstract
In the pre-antibiotic era, common bacterial infections accounted for high mortality and morbidity. Moreover, the discovery of penicillin in 1928 marked the beginning of an antibiotic revolution, and this antibiotic era witnessed the discovery of many novel antibiotics, a golden era. However, the misuse or overuse of these antibiotics, natural resistance that existed even before the antibiotics were discovered, genetic variations in bacteria, natural selection, and acquisition of resistance from one species to another consistently increased the resistance to the existing antibacterial targets. Antibacterial resistance (ABR) is now becoming an ever-increasing concern jeopardizing global health. Henceforth, there is an urgent unmet need to discover novel compounds to combat ABR, which act through untapped pathways/mechanisms. Filamentous Temperature Sensitive mutant Z (FtsZ) is one such unique target, a tubulin homolog involved in developing a cytoskeletal framework for the cytokinetic ring. Additionally, its pivotal role in bacterial cell division and the lack of homologous structural protein in mammals makes it a potential antibacterial target for developing novel molecules. Approximately 2176 X-crystal structures of FtsZ were available, which initiated the research efforts to develop novel antibacterial agents. The literature has reported several natural, semisynthetic, peptides, and synthetic molecules as FtsZ inhibitors. This review provides valuable insights into the basic crystal structure of FtsZ, its inhibitors, and their inhibitory activities. This review also describes the available in vitro detection and quantification methods of FtsZ-drug complexes and the various approaches for determining drugs targeting FtsZ polymerization.
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Affiliation(s)
- Sumaiya Kifayat
- Department of Pharmacology, NIMS Institute of Pharmacy, NIMS University Rajasthan Jaipur 303121 India +91-9291661992
| | - Vidyasrilekha Yele
- Department of Pharmaceutical Chemistry, NIMS Institute of Pharmacy, NIMS University Rajasthan Jaipur 303121 India
| | - Akram Ashames
- College of Pharmacy & Health Sciences, Ajman University PO Box 340 Ajman United Arab Emirates
- Center of Medical and Bio-allied Health Sciences Research, Ajman University PO Box 340 Ajman United Arab Emirates +97167056240
| | - Dilep Kumar Sigalapalli
- Department of Pharmaceutical Chemistry, Vignan Pharmacy College, Jawaharlal Nehru Technological University Vadlamudi 522213 Andhra Pradesh India
| | - Richie R Bhandare
- College of Pharmacy & Health Sciences, Ajman University PO Box 340 Ajman United Arab Emirates
- Center of Medical and Bio-allied Health Sciences Research, Ajman University PO Box 340 Ajman United Arab Emirates +97167056240
| | - Afzal B Shaik
- St. Mary's College of Pharmacy, St. Mary's Group of Institutions Guntur, Affiliated to Jawaharlal Nehru Technological University Kakinada Chebrolu Guntur 522212 Andhra Pradesh India
| | | | - Bharat Kumar Reddy Sanapalli
- Department of Pharmacology, NIMS Institute of Pharmacy, NIMS University Rajasthan Jaipur 303121 India +91-9291661992
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Qiu H, Zhao X, Jiang Y, Liang W, Wang W, Jiang X, Jiang M, Wang X, Cui W, Li Y, Tang K, Zhang T, Zhao L, Liang H. Design and synthesis of fascaplysin derivatives as inhibitors of FtsZ with potent antibacterial activity and mechanistic study. Eur J Med Chem 2023; 254:115348. [PMID: 37060755 DOI: 10.1016/j.ejmech.2023.115348] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/20/2023] [Accepted: 04/03/2023] [Indexed: 04/17/2023]
Abstract
The increase in antibiotic resistance has made it particularly urgent to develop new antibiotics with novel antibacterial mechanisms. Inhibition of bacterial cell division by disrupting filamentous temperature-sensitive mutant Z (FtsZ) function is an effective and promising approach. A series of novel fascaplysin derivatives with tunable hydrophobicity were designed and synthesized here. The in vitro bioactivity assessment revealed that these compounds could inhibit the tested Gram-positive bacteria including methicillin-resistant S. aureus (MRSA) (MIC = 0.049-25 μg/mL), B. subtilis (MIC = 0.024-12.5 μg/mL) and S. pneumoniae (MIC = 0.049-50 μg/mL). Among them, compounds B3 (MIC = 0.098 μg/mL), B6 (MIC = 0.098 μg/mL), B8 (MIC = 0.049 μg/mL) and B16 (MIC = 0.098 μg/mL) showed the best bactericidal activities against MRSA and no significant tendency to trigger bacterial resistance as well as rapid bactericidal properties. The cell surface integrity of bacteria was significantly disrupted by hydrophobic tails of fascaplysin derivatives. Further studies revealed that these highly active amphiphilic compounds showed low hemolytic activity and cytotoxicity to mammalian cells. Preliminary mechanistic exploration suggests that B3, B6, B8 and B16 are potent FtsZ inhibitors to promote FtsZ polymerization and inhibit GTPase activity of FtsZ, leading to the death of bacterial cells by inhibiting bacterial division. Molecular docking simulations and structure-activity relationship (SAR) study reveal that appropriate increase in the hydrophobicity of fascaplysin derivatives and the addition of additional hydrogen bonds facilitated their binding to FtsZ proteins. These amphiphilic fascaplysin derivatives could serve as a novel class of FtsZ inhibitors, which not only gives new prospects for the application of compounds containing this skeleton but also provides new ideas for the discovery of new antibiotics.
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Affiliation(s)
- Hongda Qiu
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Xing Zhao
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Yinli Jiang
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Weida Liang
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Weile Wang
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Xingyao Jiang
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Mengying Jiang
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Xiao Wang
- School of Medicine, Ningbo University, Ningbo, 315211, China.
| | - Wei Cui
- School of Medicine, Ningbo University, Ningbo, 315211, China
| | - Yang Li
- Institute of Drug Discovery Technology, Ningbo University, Ningbo, 315211, China
| | - Keqi Tang
- Institute of Mass Spectrometry, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Tao Zhang
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, Guangdong Provincial Key Laboratory of Laser Life Science, and College of Biophotonics, South China Normal University, Guangzhou, 510631, China
| | - Lingling Zhao
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Hongze Liang
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China.
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8
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A Comparative Study of the Inhibitory Action of Berberine Derivatives on the Recombinant Protein FtsZ of E. coli. Int J Mol Sci 2023; 24:ijms24065674. [PMID: 36982749 PMCID: PMC10057996 DOI: 10.3390/ijms24065674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 02/28/2023] [Accepted: 03/14/2023] [Indexed: 03/18/2023] Open
Abstract
Medicinal plants belonging to the genus Berberis may be considered an interesting source of drugs to counteract the problem of antimicrobial multiresistance. The important properties associated with this genus are mainly due to the presence of berberine, an alkaloid with a benzyltetrahydroisoquinoline structure. Berberine is active against both Gram-negative and Gram-positive bacteria, influencing DNA duplication, RNA transcription, protein synthesis, and the integrity of the cell surface structure. Countless studies have shown the enhancement of these beneficial effects following the synthesis of different berberine analogues. Recently, a possible interaction between berberine derivatives and the FtsZ protein was predicted through molecular docking simulations. FtsZ is a highly conserved protein essential for the first step of cell division in bacteria. The importance of FtsZ for the growth of numerous bacterial species and its high conservation make it a perfect candidate for the development of broad-spectrum inhibitors. In this work, we investigate the inhibition mechanisms of the recombinant FtsZ of Escherichia coli by different N-arylmethyl benzodioxolethylamines as berberine simplified analogues appropriately designed to evaluate the effect of structural changes on the interaction with the enzyme. All the compounds determine the inhibition of FtsZ GTPase activity by different mechanisms. The tertiary amine 1c proved to be the best competitive inhibitor, as it causes a remarkable increase in FtsZ Km (at 40 μM) and a drastic reduction in its assembly capabilities. Moreover, a fluorescence spectroscopic analysis carried out on 1c demonstrated its strong interaction with FtsZ (Kd = 26.6 nM). The in vitro results were in agreement with docking simulation studies.
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9
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Sharma AK, Poddar SM, Chakraborty J, Nayak BS, Kalathil S, Mitra N, Gayathri P, Srinivasan R. A mechanism of salt bridge-mediated resistance to FtsZ inhibitor PC190723 revealed by a cell-based screen. Mol Biol Cell 2023; 34:ar16. [PMID: 36652338 PMCID: PMC10011733 DOI: 10.1091/mbc.e22-12-0538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Bacterial cell division proteins, especially the tubulin homologue FtsZ, have emerged as strong targets for developing new antibiotics. Here, we have utilized the fission yeast heterologous expression system to develop a cell-based assay to screen for small molecules that directly and specifically target the bacterial cell division protein FtsZ. The strategy also allows for simultaneous assessment of the toxicity of the drugs to eukaryotic yeast cells. As a proof-of-concept of the utility of this assay, we demonstrate the effect of the inhibitors sanguinarine, berberine, and PC190723 on FtsZ. Though sanguinarine and berberine affect FtsZ polymerization, they exert a toxic effect on the cells. Further, using this assay system, we show that PC190723 affects Helicobacter pylori FtsZ function and gain new insights into the molecular determinants of resistance to PC190723. On the basis of sequence and structural analysis and site-specific mutations, we demonstrate that the presence of salt bridge interactions between the central H7 helix and β-strands S9 and S10 mediates resistance to PC190723 in FtsZ. The single-step in vivo cell-based assay using fission yeast enabled us to dissect the contribution of sequence-specific features of FtsZ and cell permeability effects associated with bacterial cell envelopes. Thus, our assay serves as a potent tool to rapidly identify novel compounds targeting polymeric bacterial cytoskeletal proteins like FtsZ to understand how they alter polymerization dynamics and address resistance determinants in targets.
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Affiliation(s)
- Ajay Kumar Sharma
- School of Biological Sciences, National Institute of Science Education and Research, Bhubaneswar 752050, India.,Centre for Interdisciplinary Sciences, National Institute of Science Education and Research, Bhubaneswar 752050, India.,Homi Bhabha National Institutes, Anushakti Nagar, Mumbai 400094, India
| | - Sakshi Mahesh Poddar
- School of Biological Sciences, National Institute of Science Education and Research, Bhubaneswar 752050, India.,Centre for Interdisciplinary Sciences, National Institute of Science Education and Research, Bhubaneswar 752050, India.,Homi Bhabha National Institutes, Anushakti Nagar, Mumbai 400094, India
| | - Joyeeta Chakraborty
- Biology, Indian Institute of Science Education and Research, Pune 411008, India
| | - Bhagyashri Soumya Nayak
- School of Biological Sciences, National Institute of Science Education and Research, Bhubaneswar 752050, India.,Centre for Interdisciplinary Sciences, National Institute of Science Education and Research, Bhubaneswar 752050, India.,Homi Bhabha National Institutes, Anushakti Nagar, Mumbai 400094, India
| | - Srilakshmi Kalathil
- School of Biological Sciences, National Institute of Science Education and Research, Bhubaneswar 752050, India.,Centre for Interdisciplinary Sciences, National Institute of Science Education and Research, Bhubaneswar 752050, India.,Homi Bhabha National Institutes, Anushakti Nagar, Mumbai 400094, India
| | - Nivedita Mitra
- School of Biological Sciences, National Institute of Science Education and Research, Bhubaneswar 752050, India.,Centre for Interdisciplinary Sciences, National Institute of Science Education and Research, Bhubaneswar 752050, India.,Homi Bhabha National Institutes, Anushakti Nagar, Mumbai 400094, India
| | - Pananghat Gayathri
- Biology, Indian Institute of Science Education and Research, Pune 411008, India
| | - Ramanujam Srinivasan
- School of Biological Sciences, National Institute of Science Education and Research, Bhubaneswar 752050, India.,Centre for Interdisciplinary Sciences, National Institute of Science Education and Research, Bhubaneswar 752050, India.,Homi Bhabha National Institutes, Anushakti Nagar, Mumbai 400094, India
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10
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Models versus pathogens: how conserved is the FtsZ in bacteria? Biosci Rep 2023; 43:232502. [PMID: 36695643 PMCID: PMC9939409 DOI: 10.1042/bsr20221664] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 01/10/2023] [Accepted: 01/25/2023] [Indexed: 01/26/2023] Open
Abstract
Combating anti-microbial resistance by developing alternative strategies is the need of the hour. Cell division, particularly FtsZ, is being extensively studied for its potential as an alternative target for anti-bacterial therapy. Bacillus subtilis and Escherichia coli are the two well-studied models for research on FtsZ, the leader protein of the cell division machinery. As representatives of gram-positive and gram-negative bacteria, respectively, these organisms have provided an extensive outlook into the process of cell division in rod-shaped bacteria. However, research on other shapes of bacteria, like cocci and ovococci, lags behind that of model rods. Even though most regions of FtsZ show sequence and structural conservation throughout bacteria, the differences in FtsZ functioning and interacting partners establish several different modes of division in different bacteria. In this review, we compare the features of FtsZ and cell division in the model rods B. subtilis and E. coli and the four pathogens: Staphylococcus aureus, Streptococcus pneumoniae, Mycobacterium tuberculosis, and Pseudomonas aeruginosa. Reviewing several recent articles on these pathogenic bacteria, we have highlighted the functioning of FtsZ, the unique roles of FtsZ-associated proteins, and the cell division processes in them. Further, we provide a detailed look at the anti-FtsZ compounds discovered and their target bacteria, emphasizing the need for elucidation of the anti-FtsZ mechanism of action in different bacteria. Current challenges and opportunities in the ongoing journey of identifying potent anti-FtsZ drugs have also been described.
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11
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Dohle W, Su X, Nigam Y, Dudley E, Potter BVL. Synthesis and In Vitro Antimicrobial SAR of Benzyl and Phenyl Guanidine and Aminoguanidine Hydrazone Derivatives. Molecules 2022; 28:5. [PMID: 36615201 PMCID: PMC9822361 DOI: 10.3390/molecules28010005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/13/2022] [Accepted: 12/15/2022] [Indexed: 12/24/2022] Open
Abstract
A series of benzyl, phenyl guanidine, and aminoguandine hydrazone derivatives was designed and in vitro antibacterial activities against two different bacterial strains (Staphylococcus aureus and Escherichia coli) were determined. Several compounds showed potent inhibitory activity against the bacterial strains evaluated, with minimal inhibitory concentration (MIC) values in the low µg/mL range. Of all guanidine derivatives, 3-[2-chloro-3-(trifluoromethyl)]-benzyloxy derivative 9m showed the best potency with MICs of 0.5 µg/mL (S. aureus) and 1 µg/mL (E. coli), respectively. Several aminoguanidine hydrazone derivatives also showed good overall activity. Compounds 10a, 10j, and 10r-s displayed MICs of 4 µg/mL against both S. aureus and E. coli. In the aminoguanidine hydrazone series, 3-(4-trifluoromethyl)-benzyloxy derivative 10d showed the best potency against S. aureus (MIC 1 µg/mL) but was far less active against E. coli (MIC 16 µg/mL). Compound 9m and the para-substituted derivative 9v also showed promising results against two strains of methicillin-resistant Staphylococcus aureus (MRSA). These results provide new and potent structural leads for further antibiotic optimisation strategies.
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Affiliation(s)
- Wolfgang Dohle
- Medicinal Chemistry & Drug Discovery, Department of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3QT, UK
- Department of Pharmacy & Pharmacology, University of Bath, Claverton Down, Bath BA2 7AY, UK
| | - Xiangdong Su
- Medicinal Chemistry & Drug Discovery, Department of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3QT, UK
- Department of Pharmacy & Pharmacology, University of Bath, Claverton Down, Bath BA2 7AY, UK
| | - Yamni Nigam
- Faculty of Medicine, Health and Life Science, Swansea University, Singleton Park, Swansea SA2 8PP, UK
| | - Edward Dudley
- Faculty of Medicine, Health and Life Science, Swansea University, Singleton Park, Swansea SA2 8PP, UK
| | - Barry V. L. Potter
- Medicinal Chemistry & Drug Discovery, Department of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3QT, UK
- Department of Pharmacy & Pharmacology, University of Bath, Claverton Down, Bath BA2 7AY, UK
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12
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Bourgard C, Rodríguez-Hernández D, Rudenko A, Rutgersson C, Palm M, Larsson DGJ, Farewell A, Grøtli M, Sunnerhagen P. Development of Dicationic Bisguanidine-Arylfuran Derivatives as Potent Agents against Gram-Negative Bacteria. Antibiotics (Basel) 2022; 11:antibiotics11081115. [PMID: 36009984 PMCID: PMC9404985 DOI: 10.3390/antibiotics11081115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 08/12/2022] [Accepted: 08/16/2022] [Indexed: 11/29/2022] Open
Abstract
Antibiotic resistance among bacteria is a growing global challenge. A major reason for this is the limited progress in developing new classes of antibiotics active against Gram-negative bacteria. Here, we investigate the antibacterial activity of a dicationic bisguanidine-arylfuran, originally developed as an antitrypanosomal agent, and new derivatives thereof. The compounds showed good activity (EC50 2–20 µM) against antibiotic-resistant isolates of the Gram-negative members of the ESKAPE group (Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, Enterobacter spp.) and Escherichia coli with different antibiotic susceptibility patterns, including ESBL isolates. Cytotoxicity was moderate, and several of the new derivatives were less cytotoxic than the lead molecule, offering better selectivity indices (40–80 for several ESKAPE isolates). The molecular mechanism for the antibacterial activity of these molecules is unknown, but sensitivity profiling against human ESKAPE isolates and E. coli collections with known susceptibility patterns against established antibiotics indicates that it is distinct from lactam and quinolone antibiotics.
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Affiliation(s)
- Catarina Bourgard
- Department of Chemistry and Molecular Biology, University of Gothenburg, S-405 30 Gothenburg, Sweden
- Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, S-405 30 Gothenburg, Sweden
| | - Diego Rodríguez-Hernández
- Department of Chemistry and Molecular Biology, University of Gothenburg, S-405 30 Gothenburg, Sweden
| | - Anastasia Rudenko
- Department of Chemistry and Molecular Biology, University of Gothenburg, S-405 30 Gothenburg, Sweden
- Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, S-405 30 Gothenburg, Sweden
| | - Carolin Rutgersson
- Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, S-405 30 Gothenburg, Sweden
- Institute of Biomedicine, Department of Infectious Diseases, University of Gothenburg, S-413 46 Gothenburg, Sweden
| | - Martin Palm
- Department of Chemistry and Molecular Biology, University of Gothenburg, S-405 30 Gothenburg, Sweden
- Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, S-405 30 Gothenburg, Sweden
| | - D. G. Joakim Larsson
- Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, S-405 30 Gothenburg, Sweden
- Institute of Biomedicine, Department of Infectious Diseases, University of Gothenburg, S-413 46 Gothenburg, Sweden
| | - Anne Farewell
- Department of Chemistry and Molecular Biology, University of Gothenburg, S-405 30 Gothenburg, Sweden
- Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, S-405 30 Gothenburg, Sweden
| | - Morten Grøtli
- Department of Chemistry and Molecular Biology, University of Gothenburg, S-405 30 Gothenburg, Sweden
- Correspondence: (M.G.); (P.S.)
| | - Per Sunnerhagen
- Department of Chemistry and Molecular Biology, University of Gothenburg, S-405 30 Gothenburg, Sweden
- Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, S-405 30 Gothenburg, Sweden
- Correspondence: (M.G.); (P.S.)
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13
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Zhong DX, She MT, Guo XC, Zheng BX, Huang XH, Zhang YH, Ser HL, Wong WL, Sun N, Lu YJ. Design and synthesis of quinolinium-based derivatives targeting FtsZ for antibacterial evaluation and mechanistic study. Eur J Med Chem 2022; 236:114360. [PMID: 35421657 DOI: 10.1016/j.ejmech.2022.114360] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 04/03/2022] [Accepted: 04/04/2022] [Indexed: 01/03/2023]
Abstract
The discovery of small molecular inhibitors targeting essential and conserved bacterial drug targets such as FtsZ protein is a promising approach to fight against multi-drug resistant bacteria. In the present study, two new series of FtsZ inhibitors based on a 1-methylquinolinium scaffold were synthesized. The inhibitors possess a variety of substituent groups including the cyclic or linear amine skeleton at the 2- and 4-position of the quinolinium ring for structure-activity relationship study. In general, the inhibitors bearing a cyclic amine substituent at the 4-position of the quinolinium ring showed better antibacterial activity (MIC down to 0.25 μg/mL) than that at the 2-position, especially against Gram-positive bacteria. Among the twenty FtsZ inhibitors examined in various assays, A3 was identified to exhibit excellent antibacterial activity against S. aureus (MIC = 0.5-1 μg/mL), S. epidermidis (MIC = 0.25 μg/mL) and E. faecium (MIC = 1-8 μg/mL). More importantly, A3 showed low hemolytic toxicity (IC5 = 64 μg/mL) and was found not readily to induce drug resistance. A3 at 2-8 μg/mL promoted the polymerization of FtsZ and interrupted the bacterial division. Furthermore, the ligand-FtsZ interaction study conducted with circular dichroism and molecular docking revealed that A3 induced secondary structure changes of FtsZ protein upon binding to the interdomain cleft of the protein. A3 is thus a potent inhibitor of FtsZ and shows potential to be used as a new antibacterial agent against drug-resistant bacteria.
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Affiliation(s)
- Dong-Xiao Zhong
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Meng-Ting She
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Xiao-Chun Guo
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Bo-Xin Zheng
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Xuan-He Huang
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Yi-Han Zhang
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Hooi-Leng Ser
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Wing-Leung Wong
- The State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Ning Sun
- The State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China; Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, 510180, PR China.
| | - Yu-Jing Lu
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China; Engineering Research Academy of High Value Utilization of Green Plants, Meizhou, 514021, PR China; Golden Health (Guangdong) Biotechnology Co., Ltd, Foshan, 28225, PR China.
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14
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Shang Q, Tang H, Liu Y, Yin M, Su L, Xie S, Liu L, Yang W, Chen Y, Dong J, Zhou Y, Yin SF. Cu(i) catalysis for selective condensation/bicycloaromatization of two different arylalkynes: direct and general construction of functionalized C-N axial biaryl compounds. Chem Sci 2021; 13:263-273. [PMID: 35059176 PMCID: PMC8694356 DOI: 10.1039/d1sc03865f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 12/03/2021] [Indexed: 12/27/2022] Open
Abstract
Selective condensation/bicycloaromatization of two different arylalkynes is firstly developed under ligand-free copper(i)-catalysis, which allows the direct synthesis of C-N axial biaryl compounds in high yields with excellent selectivity and functional group tolerance. Due to the critical effects of Cu(i) catalyst and HFIP, many easily occurring undesired reactions are suppressed, and the coupled five-six aromatic rings are constructed via the selective formation of two C(sp2)-N(sp2) bonds and four C(sp2)-C(sp2) bonds. The achievement of moderate enantioselectivity verifies its potential for the simplest asymmetric synthesis of atropoisomeric biaryls. Western blotting demonstrated that the newly developed compounds are promising targets in biology and pharmaceuticals. This unique reaction can construct structurally diverse C-N axial biaryl compounds that have never been reported by other methods, and might be extended to various applications in materials, chemistry, biology, and pharmaceuticals.
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Affiliation(s)
- Qian Shang
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 China
| | - Haifang Tang
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 China
| | - Yongping Liu
- School of Medicine, Hunan University of Chinese Medicine Changsha 410208 China
| | - MingMing Yin
- School of Medicine, Hunan University of Chinese Medicine Changsha 410208 China
| | - Lebin Su
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 China
| | - Shimin Xie
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 China
| | - Lixin Liu
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 China
| | - Wen Yang
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 China
| | - Yi Chen
- School of Medicine, Hunan University of Chinese Medicine Changsha 410208 China
| | - Jianyu Dong
- Department of Educational Science, Hunan First Normal University Changsha 410205 China
| | - Yongbo Zhou
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 China
| | - Shuang-Feng Yin
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 China
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15
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Kumar M, Mathur T, Barman TK, Chaira T, Kumar R, Joshi V, Pandya M, Sharma L, Fujii K, Bandgar M, Jadhav B, Bambal R, Upadhyay D, Masuda N, Verma AK, Bhatnagar PK. Novel FtsZ inhibitor with potent activity against Staphylococcus aureus. J Antimicrob Chemother 2021; 76:2867-2874. [PMID: 34383913 DOI: 10.1093/jac/dkab270] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Accepted: 06/29/2021] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES FtsZ is an essential bacterial protein and an unexplored target for the development of antibacterial drugs. The development of a novel inhibitor targeting FtsZ offers a potential opportunity to combat drug resistance. DS01750413, a new derivative of PC190723, is a novel FtsZ inhibitor with improved in vitro and in vivo activity. The objective of this study was to investigate the efficacy of DS01750413 against Staphylococcus spp., including MRSA, in in vitro and in vivo models. METHODS In vitro activities of DS01750413 and standard-of-care antibiotics were evaluated against clinical isolates of Gram-positive pathogens. The in vivo efficacy was evaluated in a murine systemic infection model caused by MRSA. RESULTS DS01750413 showed potent in vitro activity against MRSA clinical isolates with MIC ranges of 0.5-1 mg/L and also demonstrated concentration-dependent bactericidal killing. In the murine bacteraemia infection model of MRSA, treatment with DS01750413 resulted in prolonged survival of animals compared with placebo-treated animals and exhibited a significant reduction in the bacterial load in liver, spleen, lungs and kidneys. CONCLUSIONS DS01750413 showed encouraging in vitro and in vivo activity against MRSA. As a novel chemical class, DS01750413 has the potential to become clinically viable antibiotics to address the drug resistance problem by its unique novel targeting mechanism of action.
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Affiliation(s)
- Manoj Kumar
- Daiichi Sankyo India Pharma Private Limited, Village Sarhaul, Sector-18, Udyog Vihar Industrial Area, Gurgaon 122 015, Haryana, India
| | - Tarun Mathur
- Daiichi Sankyo India Pharma Private Limited, Village Sarhaul, Sector-18, Udyog Vihar Industrial Area, Gurgaon 122 015, Haryana, India
| | - Tarani Kanta Barman
- Daiichi Sankyo India Pharma Private Limited, Village Sarhaul, Sector-18, Udyog Vihar Industrial Area, Gurgaon 122 015, Haryana, India
| | - Tridib Chaira
- Daiichi Sankyo India Pharma Private Limited, Village Sarhaul, Sector-18, Udyog Vihar Industrial Area, Gurgaon 122 015, Haryana, India
| | - Ram Kumar
- Daiichi Sankyo India Pharma Private Limited, Village Sarhaul, Sector-18, Udyog Vihar Industrial Area, Gurgaon 122 015, Haryana, India
| | - Vattan Joshi
- Daiichi Sankyo India Pharma Private Limited, Village Sarhaul, Sector-18, Udyog Vihar Industrial Area, Gurgaon 122 015, Haryana, India
| | - Manisha Pandya
- Daiichi Sankyo India Pharma Private Limited, Village Sarhaul, Sector-18, Udyog Vihar Industrial Area, Gurgaon 122 015, Haryana, India
| | - Lalima Sharma
- Daiichi Sankyo India Pharma Private Limited, Village Sarhaul, Sector-18, Udyog Vihar Industrial Area, Gurgaon 122 015, Haryana, India
| | - Kunihiko Fujii
- Daiichi Sankyo India Pharma Private Limited, Village Sarhaul, Sector-18, Udyog Vihar Industrial Area, Gurgaon 122 015, Haryana, India
| | - Mahadev Bandgar
- Daiichi Sankyo India Pharma Private Limited, Village Sarhaul, Sector-18, Udyog Vihar Industrial Area, Gurgaon 122 015, Haryana, India
| | - Balasaheb Jadhav
- Daiichi Sankyo India Pharma Private Limited, Village Sarhaul, Sector-18, Udyog Vihar Industrial Area, Gurgaon 122 015, Haryana, India
| | - Ramesh Bambal
- Daiichi Sankyo India Pharma Private Limited, Village Sarhaul, Sector-18, Udyog Vihar Industrial Area, Gurgaon 122 015, Haryana, India
| | - Dilip Upadhyay
- Daiichi Sankyo India Pharma Private Limited, Village Sarhaul, Sector-18, Udyog Vihar Industrial Area, Gurgaon 122 015, Haryana, India
| | - Nobuhisa Masuda
- Daiichi Sankyo India Pharma Private Limited, Village Sarhaul, Sector-18, Udyog Vihar Industrial Area, Gurgaon 122 015, Haryana, India
| | - Ashwani Kumar Verma
- Daiichi Sankyo India Pharma Private Limited, Village Sarhaul, Sector-18, Udyog Vihar Industrial Area, Gurgaon 122 015, Haryana, India
| | - Pradip Kumar Bhatnagar
- Daiichi Sankyo India Pharma Private Limited, Village Sarhaul, Sector-18, Udyog Vihar Industrial Area, Gurgaon 122 015, Haryana, India
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16
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Tangadanchu VKR, Sui YF, Zhou CH. Isatin-derived azoles as new potential antimicrobial agents: Design, synthesis and biological evaluation. Bioorg Med Chem Lett 2021; 41:128030. [PMID: 33839249 DOI: 10.1016/j.bmcl.2021.128030] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 04/03/2021] [Accepted: 04/05/2021] [Indexed: 12/18/2022]
Abstract
Novel antibiotics are forced to be developed on account of multidrug-resistant bacteria with serious threats to human health. This work developed isatin-derived azoles as new potential antimicrobial agents. Bioactive assay revealed that isatin hybridized 1,2,4-triazole 7a exhibited excellent inhibitory activity against E. coli ATCC 25,922 with an MIC value of 1 µg/mL, which was 8-fold more potent than reference drug norfloxacin. The active molecule 7a possessed the ability to kill some bacteria and fungi as well as displayed low propensity to induce resistance towards E. coli ATCC25922. Preliminary mechanism investigation indicated that hybrid 7a might block deoxyribonucleic acid (DNA) replication by intercalating with DNA and possibly interacting with DNA polymerase III, thus exerting its antimicrobial potency.
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Affiliation(s)
- Vijai Kumar Reddy Tangadanchu
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Yan-Fei Sui
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Cheng-He Zhou
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
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17
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Zorrilla S, Monterroso B, Robles-Ramos MÁ, Margolin W, Rivas G. FtsZ Interactions and Biomolecular Condensates as Potential Targets for New Antibiotics. Antibiotics (Basel) 2021; 10:antibiotics10030254. [PMID: 33806332 PMCID: PMC7999717 DOI: 10.3390/antibiotics10030254] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 02/25/2021] [Accepted: 02/26/2021] [Indexed: 12/18/2022] Open
Abstract
FtsZ is an essential and central protein for cell division in most bacteria. Because of its ability to organize into dynamic polymers at the cell membrane and recruit other protein partners to form a “divisome”, FtsZ is a leading target in the quest for new antibacterial compounds. Strategies to potentially arrest the essential and tightly regulated cell division process include perturbing FtsZ’s ability to interact with itself and other divisome proteins. Here, we discuss the available methodologies to screen for and characterize those interactions. In addition to assays that measure protein-ligand interactions in solution, we also discuss the use of minimal membrane systems and cell-like compartments to better approximate the native bacterial cell environment and hence provide a more accurate assessment of a candidate compound’s potential in vivo effect. We particularly focus on ways to measure and inhibit under-explored interactions between FtsZ and partner proteins. Finally, we discuss recent evidence that FtsZ forms biomolecular condensates in vitro, and the potential implications of these assemblies in bacterial resistance to antibiotic treatment.
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Affiliation(s)
- Silvia Zorrilla
- Centro de Investigaciones Biológicas Margarita Salas, Consejo Superior de Investigaciones Científicas (CSIC), 28040 Madrid, Spain; (M.-Á.R.-R.); (G.R.)
- Correspondence: (S.Z.); (B.M.); Tel.: +34-91-837-3112 (S.Z. & B.M.)
| | - Begoña Monterroso
- Centro de Investigaciones Biológicas Margarita Salas, Consejo Superior de Investigaciones Científicas (CSIC), 28040 Madrid, Spain; (M.-Á.R.-R.); (G.R.)
- Correspondence: (S.Z.); (B.M.); Tel.: +34-91-837-3112 (S.Z. & B.M.)
| | - Miguel-Ángel Robles-Ramos
- Centro de Investigaciones Biológicas Margarita Salas, Consejo Superior de Investigaciones Científicas (CSIC), 28040 Madrid, Spain; (M.-Á.R.-R.); (G.R.)
| | - William Margolin
- Department of Microbiology and Molecular Genetics, McGovern Medical School, University of Texas, Houston, TX 77030, USA;
| | - Germán Rivas
- Centro de Investigaciones Biológicas Margarita Salas, Consejo Superior de Investigaciones Científicas (CSIC), 28040 Madrid, Spain; (M.-Á.R.-R.); (G.R.)
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18
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Kim SH, Semenya D, Castagnolo D. Antimicrobial drugs bearing guanidine moieties: A review. Eur J Med Chem 2021; 216:113293. [PMID: 33640673 DOI: 10.1016/j.ejmech.2021.113293] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 02/08/2021] [Accepted: 02/09/2021] [Indexed: 12/31/2022]
Abstract
Compounds incorporating guanidine moieties constitute a versatile class of biologically interesting molecules with a wide array of applications. As such, guanidines have been exploited as privileged structural motifs in designing novel drugs for the treatment of various infectious and non-infectious diseases. In designing anti-infective agents, this moiety carries great appeal by virtue of attributes such as hydrogen-bonding capability and protonatability at physiological pH in the context of interaction with biological targets. This review provides an overview of recent advances in hit-to-lead development studies of antimicrobial guanidine-containing compounds with the aim to highlight their structural diversity and the pharmacological relevance of the moiety to drug activity, insofar as possible. In so doing, emphasis is put on chemical and microbiological properties of such compounds in relation to antibacterial, antifungal and antimalarial activities.
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Affiliation(s)
- Seong-Heun Kim
- School of Cancer and Pharmaceutical Sciences, King's College London, 150 Stamford Street, SE1 9NH, London, United Kingdom
| | - Dorothy Semenya
- School of Cancer and Pharmaceutical Sciences, King's College London, 150 Stamford Street, SE1 9NH, London, United Kingdom
| | - Daniele Castagnolo
- School of Cancer and Pharmaceutical Sciences, King's College London, 150 Stamford Street, SE1 9NH, London, United Kingdom.
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19
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Chen CC, Zhang YQ, Zhong DX, Huang XH, Zhang YH, Jiang WH, Li M, Chen Q, Wong WL, Lu YJ. The study of 9,10-dihydroacridine derivatives as a new and effective molecular scaffold for antibacterial agent development. Biochem Biophys Res Commun 2021; 546:40-45. [PMID: 33561747 DOI: 10.1016/j.bbrc.2021.01.096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 01/28/2021] [Indexed: 10/22/2022]
Abstract
The emergence of worldwide spreading drug-resistant bacteria has been a serious threat to public health during the past decades. The development of new and effective antibacterial agents to address this critical issue is an urgent action. In the present study, we investigated the antibacterial activity of two 9,10-dihydroacridine derivatives and their mechanism. Both compounds were found possessing strong antibacterial activity against some selected Gram-positive bacteria including MRSA, VISA and VRE. The biological study suggests that the compounds promoted FtsZ polymerization and also disrupted Z-ring formation at the dividing site and consequently, the bacterial cell division is interrupted and causing cell death.
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Affiliation(s)
- Cui-Cui Chen
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Yi-Qi Zhang
- College of Marine Science, Shandong University, Weihai, 264209, PR China
| | - Dong-Xiao Zhong
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Xuan-He Huang
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Yi-Han Zhang
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Wen-Hao Jiang
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Ming Li
- The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510700, PR China
| | - Qian Chen
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, PR China.
| | - Wing-Leung Wong
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, 529020, PR China.
| | - Yu-Jing Lu
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China.
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20
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Chai WC, Whittall JJ, Song D, Polyak SW, Ogunniyi AD, Wang Y, Bi F, Ma S, Semple SJ, Venter H. Antimicrobial Action and Reversal of Resistance in MRSA by Difluorobenzamide Derivatives Targeted at FtsZ. Antibiotics (Basel) 2020; 9:E873. [PMID: 33291418 PMCID: PMC7762090 DOI: 10.3390/antibiotics9120873] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 11/26/2020] [Accepted: 11/28/2020] [Indexed: 01/21/2023] Open
Abstract
The bacterial cell division protein, FtsZ, has been identified as a target for antimicrobial development. Derivatives of 3-methoxybenzamide have shown promising activities as FtsZ inhibitors in Gram-positive bacteria. We sought to characterise the activity of five difluorobenzamide derivatives with non-heterocyclic substituents attached through the 3-oxygen. These compounds exhibited antimicrobial activity against methicillin resistant Staphylococcus aureus (MRSA), with an isopentyloxy-substituted compound showing modest activity against vancomycin resistant Enterococcus faecium (VRE). The compounds were able to reverse resistance to oxacillin in highly resistant clinical MRSA strains at concentrations far below their MICs. Three of the compounds inhibited an Escherichia coli strain lacking the AcrAB components of a drug efflux pump, which suggests the lack of Gram-negative activity can partly be attributed to efflux. The compounds inhibited cell division by targeting S. aureus FtsZ, producing a dose-dependent increase in GTPase rate which increased the rate of FtsZ polymerization and stabilized the FtsZ polymers. These compounds did not affect the polymerization of mammalian tubulin and did not display haemolytic activity or cytotoxicity. These derivatives are therefore promising compounds for further development as antimicrobial agents or as resistance breakers to re-sensitive MRSA to beta-lactam antibiotics.
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Affiliation(s)
- Wern Chern Chai
- Health and Biomedical Innovation, Clinical and Health Sciences, University of South Australia, SA 5000 Adelaide, Australia; (W.C.C.); (J.J.W.); (S.W.P.); (S.J.S.)
| | - Jonathan J. Whittall
- Health and Biomedical Innovation, Clinical and Health Sciences, University of South Australia, SA 5000 Adelaide, Australia; (W.C.C.); (J.J.W.); (S.W.P.); (S.J.S.)
| | - Di Song
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China; (D.S.); (Y.W.); (F.B.); (S.M.)
| | - Steven W. Polyak
- Health and Biomedical Innovation, Clinical and Health Sciences, University of South Australia, SA 5000 Adelaide, Australia; (W.C.C.); (J.J.W.); (S.W.P.); (S.J.S.)
| | - Abiodun D. Ogunniyi
- Australia Centre for Antimicrobial Resistance Ecology, School of Animal and Veterinary Sciences, University of Adelaide, Roseworthy Campus, SA 5371 Roseworthy, Australia;
| | - Yinhu Wang
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China; (D.S.); (Y.W.); (F.B.); (S.M.)
- School of Pharmacy, Liaocheng University, Liaocheng 252000, China
| | - Fangchao Bi
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China; (D.S.); (Y.W.); (F.B.); (S.M.)
| | - Shutao Ma
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China; (D.S.); (Y.W.); (F.B.); (S.M.)
| | - Susan J. Semple
- Health and Biomedical Innovation, Clinical and Health Sciences, University of South Australia, SA 5000 Adelaide, Australia; (W.C.C.); (J.J.W.); (S.W.P.); (S.J.S.)
- Quality Use of Medicines and Pharmacy Research Centre, Clinical and Health Sciences, University of South Australia, SA 5000 Adelaide, Australia
| | - Henrietta Venter
- Health and Biomedical Innovation, Clinical and Health Sciences, University of South Australia, SA 5000 Adelaide, Australia; (W.C.C.); (J.J.W.); (S.W.P.); (S.J.S.)
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21
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Design, synthesis of novel 4,5-dihydroisoxazole-containing benzamide derivatives as highly potent FtsZ inhibitors capable of killing a variety of MDR Staphylococcus aureus. Bioorg Med Chem 2020; 28:115729. [DOI: 10.1016/j.bmc.2020.115729] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/30/2020] [Accepted: 08/19/2020] [Indexed: 12/11/2022]
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22
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Kusuma KD, Payne M, Ung AT, Bottomley AL, Harry EJ. FtsZ as an Antibacterial Target: Status and Guidelines for Progressing This Avenue. ACS Infect Dis 2019; 5:1279-1294. [PMID: 31268666 DOI: 10.1021/acsinfecdis.9b00055] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The disturbing increase in the number of bacterial pathogens that are resistant to multiple, or sometimes all, current antibiotics highlights the desperate need to pursue the discovery and development of novel classes of antibacterials. The wealth of knowledge available about the bacterial cell division machinery has aided target-driven approaches to identify new inhibitor compounds. The main division target being pursued is the highly conserved and essential protein FtsZ. Despite very active research on FtsZ inhibitors for several years, this protein is not yet targeted by any commercial antibiotic. Here, we discuss the suitability of FtsZ as an antibacterial target for drug development and review progress achieved in this area. We use hindsight to highlight the gaps that have slowed progress in FtsZ inhibitor development and to suggest guidelines for concluding that FtsZ is actually the target of these molecules, a key missing link in several studies. In moving forward, a multidisciplinary, communicative, and collaborative process, with sharing of research expertise, is critical if we are to succeed.
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23
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Discovery of 1,3,4-oxadiazol-2-one-containing benzamide derivatives targeting FtsZ as highly potent agents of killing a variety of MDR bacteria strains. Bioorg Med Chem 2019; 27:3179-3193. [DOI: 10.1016/j.bmc.2019.06.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 05/29/2019] [Accepted: 06/05/2019] [Indexed: 11/24/2022]
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24
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Zheng C, Hou W, Liu J, Xu X, Lin J, Sun P, Chen W. Design and synthesis of 2‐hydroxyl‐4‐methoxyl‐3‐(3‐methylbut‐2‐en‐1‐yl)‐6‐(4‐phenylbenzoylamino)benzoic acid derivatives as antibacterial agents based on cajaninstilbene acid scaffold hopping. Drug Dev Res 2019; 80:750-757. [DOI: 10.1002/ddr.21556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Revised: 04/25/2019] [Accepted: 05/19/2019] [Indexed: 01/25/2023]
Affiliation(s)
- Chang Zheng
- College of PharmacyJinan University Guangzhou People's Republic of China
| | - Wen Hou
- College of PharmacyJinan University Guangzhou People's Republic of China
| | - Jun Liu
- College of PharmacyJinan University Guangzhou People's Republic of China
| | - Xiao‐Fang Xu
- College of PharmacyJinan University Guangzhou People's Republic of China
| | - Jing Lin
- College of PharmacyJinan University Guangzhou People's Republic of China
| | - Ping‐Hua Sun
- College of PharmacyJinan University Guangzhou People's Republic of China
| | - Wei‐Min Chen
- College of PharmacyJinan University Guangzhou People's Republic of China
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25
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Sun N, Li M, Cai S, Li Y, Chen C, Zheng Y, Li X, Fang Z, Lv H, Lu YJ. Antibacterial evaluation and mode of action study of BIMQ, a novel bacterial cell division inhibitor. Biochem Biophys Res Commun 2019; 514:1224-1230. [PMID: 31109649 DOI: 10.1016/j.bbrc.2019.05.086] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 05/12/2019] [Indexed: 12/20/2022]
Abstract
The worldwide spreading of antibiotic resistant bacteria is currently an extremely serious health risk and therefore to develop new antibiotics is an urgent need. In the present study, the antibacterial activity of a new indolyl quinolinium compound and its underline mechanism were investigated. The compound shows an outstanding antibacterial activity against the tested Gram-positive bacteria. The MIC values are in the range of 1-4 μg/mL. The elongation of B. subtilis cells indicates that the compound can inhibit cell division effectively. In addition, the biochemical studies prove that the compound is able to disrupt FtsZ polymerization effectively through a stimulatory mechanism. Furthermore, the compound can delay the development of drug resistance mutants.
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Affiliation(s)
- Ning Sun
- The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510700, PR China
| | - Ming Li
- The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510700, PR China
| | - Senyuan Cai
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Ying Li
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Cuicui Chen
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China
| | - Yuanyuan Zheng
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China; State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, PR China; Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, PR China
| | - Xiaomei Li
- The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510700, PR China
| | - Zhiyuan Fang
- The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510700, PR China.
| | - Haoran Lv
- The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510700, PR China.
| | - Yu-Jing Lu
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, PR China; Golden Health (Guangdong) Technology Co., Ltd, PR China.
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26
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Bi F, Song D, Zhang N, Liu Z, Gu X, Hu C, Cai X, Venter H, Ma S. Design, synthesis and structure-based optimization of novel isoxazole-containing benzamide derivatives as FtsZ modulators. Eur J Med Chem 2018; 159:90-103. [DOI: 10.1016/j.ejmech.2018.09.053] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Revised: 09/19/2018] [Accepted: 09/19/2018] [Indexed: 11/27/2022]
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27
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Novel carbazole-triazole conjugates as DNA-targeting membrane active potentiators against clinical isolated fungi. Eur J Med Chem 2018; 155:579-589. [DOI: 10.1016/j.ejmech.2018.06.022] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 05/09/2018] [Accepted: 06/08/2018] [Indexed: 11/20/2022]
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28
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Fang Z, Ban L, Li Y, Yuan W, Liu Z, Liu T, Li X, Wong KY, Lu Y, Sun N, Yao X. A quinoline-based FtsZ inhibitor for the study of antimicrobial activity and synergistic effects with β-lactam antibiotics. J Pharmacol Sci 2018; 137:283-289. [DOI: 10.1016/j.jphs.2018.07.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 07/01/2018] [Accepted: 07/06/2018] [Indexed: 11/26/2022] Open
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29
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Novel aminopyrimidinyl benzimidazoles as potentially antimicrobial agents: Design, synthesis and biological evaluation. Eur J Med Chem 2018; 143:66-84. [DOI: 10.1016/j.ejmech.2017.11.027] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 10/26/2017] [Accepted: 11/08/2017] [Indexed: 11/24/2022]
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30
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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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31
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Sun N, Zheng YY, Du RL, Cai SY, Zhang K, So LY, Cheung KC, Zhuo C, Lu YJ, Wong KY. New application of tiplaxtinin as an effective FtsZ-targeting chemotype for an antimicrobial study. MEDCHEMCOMM 2017; 8:1909-1913. [PMID: 30108711 PMCID: PMC6072346 DOI: 10.1039/c7md00387k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Accepted: 08/17/2017] [Indexed: 12/21/2022]
Abstract
The filamenting temperature-sensitive mutant Z (FtsZ) protein is generally recognized as a promising antimicrobial drug target. In the present study, a small organic molecule (tiplaxtinin) was identified for the first time as an excellent cell division inhibitor by using a cell-based screening approach from a library with 250 compounds. Tiplaxtinin possesses potent antibacterial activity against Gram-positive pathogens. Both in vitro and in vivo results reveal that the compound is able to disrupt dynamic assembly of FtsZ and Z-ring formation effectively through the mechanism of stimulating FtsZ polymerization and impairing GTPase activity.
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Affiliation(s)
- Ning Sun
- Department of Applied Biology and Chemical Technology and the State Key Laboratory of Chirosciences , The Hong Kong Polytechnic University , Kowloon , Hong Kong SAR , P.R. China . ; Tel: +852 34008686
| | - Yuan-Yuan Zheng
- Institute of Natural Medicine and Green Chemistry , School of Chemical Engineering and Light Industry , Guangdong University of Technology , Guangzhou 510006 , P.R. China . ; Tel: +86 20 39322235
| | - Ruo-Lan Du
- Department of Applied Biology and Chemical Technology and the State Key Laboratory of Chirosciences , The Hong Kong Polytechnic University , Kowloon , Hong Kong SAR , P.R. China . ; Tel: +852 34008686
| | - Sen-Yuan Cai
- Institute of Natural Medicine and Green Chemistry , School of Chemical Engineering and Light Industry , Guangdong University of Technology , Guangzhou 510006 , P.R. China . ; Tel: +86 20 39322235
| | - Kun Zhang
- Institute of Natural Medicine and Green Chemistry , School of Chemical Engineering and Light Industry , Guangdong University of Technology , Guangzhou 510006 , P.R. China . ; Tel: +86 20 39322235
| | - Lok-Yan So
- Department of Applied Biology and Chemical Technology and the State Key Laboratory of Chirosciences , The Hong Kong Polytechnic University , Kowloon , Hong Kong SAR , P.R. China . ; Tel: +852 34008686
| | - Kwan-Choi Cheung
- Department of Applied Biology and Chemical Technology and the State Key Laboratory of Chirosciences , The Hong Kong Polytechnic University , Kowloon , Hong Kong SAR , P.R. China . ; Tel: +852 34008686
| | - Chao Zhuo
- State Key Laboratory of Respiratory Diseases , The First Affiliated Hospital of Guangzhou Medical University , Guangzhou , P.R. China
| | - Yu-Jing Lu
- Institute of Natural Medicine and Green Chemistry , School of Chemical Engineering and Light Industry , Guangdong University of Technology , Guangzhou 510006 , P.R. China . ; Tel: +86 20 39322235
| | - Kwok-Yin Wong
- Department of Applied Biology and Chemical Technology and the State Key Laboratory of Chirosciences , The Hong Kong Polytechnic University , Kowloon , Hong Kong SAR , P.R. China . ; Tel: +852 34008686
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32
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Jin S, Niu Y, Liu C, Zhu L, Li Y, Cui S, Xiong Z, Cheng M, Lin B, Liu Y. Gold(I)-Initiated Cycloisomerization/Diels–Alder/Retro-Diels–Alder Cascade Strategy to Biaryls. J Org Chem 2017; 82:9066-9074. [DOI: 10.1021/acs.joc.7b01561] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Shengfei Jin
- Key
Laboratory of Structure-Based Drug Design and Discovery, Ministry
of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Yujie Niu
- Key
Laboratory of Structure-Based Drug Design and Discovery, Ministry
of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya
College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Chengjun Liu
- Key
Laboratory of Structure-Based Drug Design and Discovery, Ministry
of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya
College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Lifeng Zhu
- Key
Laboratory of Structure-Based Drug Design and Discovery, Ministry
of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya
College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Yangming Li
- Key
Laboratory of Structure-Based Drug Design and Discovery, Ministry
of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya
College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Shanshan Cui
- Key
Laboratory of Structure-Based Drug Design and Discovery, Ministry
of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Zhiling Xiong
- Key
Laboratory of Structure-Based Drug Design and Discovery, Ministry
of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Maosheng Cheng
- Key
Laboratory of Structure-Based Drug Design and Discovery, Ministry
of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Bin Lin
- Key
Laboratory of Structure-Based Drug Design and Discovery, Ministry
of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Yongxiang Liu
- Key
Laboratory of Structure-Based Drug Design and Discovery, Ministry
of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya
College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
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Sun N, Lu YJ, Chan FY, Du RL, Zheng YY, Zhang K, So LY, Abagyan R, Zhuo C, Leung YC, Wong KY. A Thiazole Orange Derivative Targeting the Bacterial Protein FtsZ Shows Potent Antibacterial Activity. Front Microbiol 2017; 8:855. [PMID: 28553278 PMCID: PMC5426085 DOI: 10.3389/fmicb.2017.00855] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Accepted: 04/27/2017] [Indexed: 01/02/2023] Open
Abstract
The prevalence of multidrug resistance among clinically significant bacteria calls for the urgent development of new antibiotics with novel mechanisms of action. In this study, a new small molecule exhibiting excellent inhibition of bacterial cell division with potent antibacterial activity was discovered through cell-based screening. The compound exhibits a broad spectrum of bactericidal activity, including the methicillin-resistant Staphylococcus aureus, vancomycin-resistant Enterococcus and NDM-1 Escherichia coli. The in vitro and in vivo results suggested that this compound disrupts the dynamic assembly of FtsZ protein and Z-ring formation through stimulating FtsZ polymerization. Moreover, this compound exhibits no activity on mammalian tubulin polymerization and shows low cytotoxicity on mammalian cells. Taken together, these findings could provide a new chemotype for development of antibacterials with FtsZ as the target.
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Affiliation(s)
- Ning Sun
- Department of Applied Biology and Chemical Technology and the State Key Laboratory of Chirosciences, The Hong Kong Polytechnic UniversityHong Kong, Hong Kong
| | - Yu-Jing Lu
- Institute of Natural Medicine and Green Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of TechnologyGuangzhou, China
| | - Fung-Yi Chan
- Department of Applied Biology and Chemical Technology and the State Key Laboratory of Chirosciences, The Hong Kong Polytechnic UniversityHong Kong, Hong Kong
| | - Ruo-Lan Du
- Department of Applied Biology and Chemical Technology and the State Key Laboratory of Chirosciences, The Hong Kong Polytechnic UniversityHong Kong, Hong Kong
| | - Yuan-Yuan Zheng
- Institute of Natural Medicine and Green Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of TechnologyGuangzhou, China
| | - Kun Zhang
- Institute of Natural Medicine and Green Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of TechnologyGuangzhou, China
| | - Lok-Yan So
- Department of Applied Biology and Chemical Technology and the State Key Laboratory of Chirosciences, The Hong Kong Polytechnic UniversityHong Kong, Hong Kong
| | - Ruben Abagyan
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La JollaCA, USA
| | - Chao Zhuo
- State Key Laboratory of Respiratory Diseases, the First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou, China
| | - Yun-Chung Leung
- Department of Applied Biology and Chemical Technology and the State Key Laboratory of Chirosciences, The Hong Kong Polytechnic UniversityHong Kong, Hong Kong
| | - Kwok-Yin Wong
- Department of Applied Biology and Chemical Technology and the State Key Laboratory of Chirosciences, The Hong Kong Polytechnic UniversityHong Kong, Hong Kong
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34
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Soulère L, Soulage CO. Exploring docking methods for virtual screening: application to the identification of neuraminidase and Ftsz potential inhibitors. MOLECULAR SIMULATION 2017. [DOI: 10.1080/08927022.2017.1290234] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Laurent Soulère
- Université de Lyon, INSA LYON, Institut de Chimie et de Biochimie Moléculaires et Supramoléculaires, ICBMS, UMR 5246, CNRS, Université Lyon 1, CPE-Lyon, Laboratoire de Chimie Organique et Bioorganique, Villeurbanne, France
| | - Christophe O. Soulage
- Université de Lyon, CarMeN lab, INSA-Lyon, INSERM U1060, Université Claude Bernard Lyon 1, Villeurbanne, France
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35
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Combining the FtsZ-Targeting Prodrug TXA709 and the Cephalosporin Cefdinir Confers Synergy and Reduces the Frequency of Resistance in Methicillin-Resistant Staphylococcus aureus. Antimicrob Agents Chemother 2016; 60:4290-6. [PMID: 27161635 DOI: 10.1128/aac.00613-16] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 04/29/2016] [Indexed: 11/20/2022] Open
Abstract
Combination therapy of bacterial infections with synergistic drug partners offers distinct advantages over monotherapy. Among these advantages are (i) a reduction of the drug dose required for efficacy, (ii) a reduced potential for drug-induced toxicity, and (iii) a reduced potential for the emergence of resistance. Here, we describe the synergistic actions of the third-generation oral cephalosporin cefdinir and TXA709, a new, FtsZ-targeting prodrug that we have developed with improved pharmacokinetics and enhanced in vivo efficacy against methicillin-resistant Staphylococcus aureus (MRSA) relative to earlier agents. We show that the active product of TXA709 (TXA707) acts synergistically with cefdinir in vitro against clinical isolates of MRSA, vancomycin-intermediate S. aureus (VISA), vancomycin-resistant S. aureus (VRSA), and linezolid-resistant S. aureus (LRSA). In addition, relative to TXA707 alone, the combination of TXA707 and cefdinir significantly reduces or eliminates the detectable emergence of resistance. We also demonstrate synergy in vivo with oral administration of the prodrug TXA709 and cefdinir in mouse models of both systemic and tissue (thigh) infections with MRSA. This synergy reduces the dose of TXA709 required for efficacy 3-fold. Viewed as a whole, our results highlight the potential of TXA709 and cefdinir as a promising combination for the treatment of drug-resistant staphylococcal infections.
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36
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Characterization of the in vitro assembly of FtsZ in Arthrobacter strain A3 using light scattering. Int J Biol Macromol 2016; 91:294-8. [PMID: 27164494 DOI: 10.1016/j.ijbiomac.2016.04.090] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 04/27/2016] [Accepted: 04/28/2016] [Indexed: 12/16/2022]
Abstract
The self-assembly of FtsZ, the bacterial homolog of tubulin, plays an essential role in cell division. Light scattering technique is applied to real-time monitor the in vitro assembly of FtsZ in Arthrobacter strain A3, a newly isolated psychrotrophic bacterium. The critical concentration needed for the assembly is estimated as 6.7μM. The polymerization of FtsZ in Arthrobacter strain A3 requires both GTP and divalent metal ions, while salt is an unfavorable condition for the assembly. The FtsZ polymerizes under a wide range of pHs, with the fastest rate around pH 6.0. The FtsZ from Arthrobacter strain A3 resembles Mycobacterium tuberculosis FtsZ in terms of the dependence on divalent metal ions and the slow polymerization rate, while it is different from M. tuberculosis FtsZ considering the sensitivity to salt and pH. The comparison of FtsZ from different organisms will greatly advance our understanding of the biological role of the key cell division protein.
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37
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Berlinck RGS, Romminger S. The chemistry and biology of guanidine natural products. Nat Prod Rep 2016; 33:456-90. [DOI: 10.1039/c5np00108k] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The present review discusses the isolation, structure determination, synthesis, biosynthesis and biological activities of secondary metabolites bearing a guanidine group.
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Affiliation(s)
| | - Stelamar Romminger
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
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38
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Adams DW, Wu LJ, Errington J. A benzamide-dependent ftsZ mutant reveals residues crucial for Z-ring assembly. Mol Microbiol 2015; 99:1028-42. [PMID: 26601800 PMCID: PMC4832351 DOI: 10.1111/mmi.13286] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/21/2015] [Indexed: 12/14/2022]
Abstract
In almost all bacteria, cell division is co-ordinated by the essential tubulin homologue FtsZ and represents an attractive but as yet unexploited target for new antibiotics. The benzamides, e.g. PC190723, are potent FtsZ inhibitors that have the potential to yield an important new class of antibiotic. However, the evolution of resistance poses a challenge to their development. Here we show that a collection of PC190723-resistant and -dependent strains of Staphylococcus aureus exhibit severe growth and morphological defects, questioning whether these ftsZ mutations would be clinically relevant. Importantly, we show that the most commonly isolated substitution remains sensitive to the simplest benzamide 3-MBA and likely works by occluding compound binding. Extending this analysis to Bacillus subtilis, we isolated a novel benzamide-dependent strain that divides using unusual helical division events. The ftsZ mutation responsible encodes the substitution of a highly conserved residue, which lies outside the benzamide-binding site and forms part of an interface between the N- and C-terminal domains that we show is necessary for normal FtsZ function. Together with an intragenic suppressor mutation that mimics benzamide binding, the results provide genetic evidence that benzamides restrict conformational changes in FtsZ and also highlights their utility as tools to probe bacterial division.
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Affiliation(s)
- David William Adams
- Centre for Bacterial Cell Biology, Baddiley-Clark Building, Medical School, Newcastle University, Richardson Road, Newcastle upon Tyne, NE2 4AX, UK
| | - Ling Juan Wu
- Centre for Bacterial Cell Biology, Baddiley-Clark Building, Medical School, Newcastle University, Richardson Road, Newcastle upon Tyne, NE2 4AX, UK
| | - Jeff Errington
- Centre for Bacterial Cell Biology, Baddiley-Clark Building, Medical School, Newcastle University, Richardson Road, Newcastle upon Tyne, NE2 4AX, UK
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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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40
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Li X, Ma S. Advances in the discovery of novel antimicrobials targeting the assembly of bacterial cell division protein FtsZ. Eur J Med Chem 2015; 95:1-15. [DOI: 10.1016/j.ejmech.2015.03.026] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 03/10/2015] [Accepted: 03/12/2015] [Indexed: 01/23/2023]
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41
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Li X, Sheng J, Huang G, Ma R, Yin F, Song D, Zhao C, Ma S. Design, synthesis and antibacterial activity of cinnamaldehyde derivatives as inhibitors of the bacterial cell division protein FtsZ. Eur J Med Chem 2015; 97:32-41. [PMID: 25938986 DOI: 10.1016/j.ejmech.2015.04.048] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2014] [Revised: 04/22/2015] [Accepted: 04/23/2015] [Indexed: 10/23/2022]
Abstract
In an attempt to discover potential antibacterial agents against the increasing bacterial resistance, novel cinnamaldehyde derivatives as FtsZ inhibitors were designed, synthesized and evaluated for their antibacterial activity against nine significant pathogens using broth microdilution method, and their cell division inhibitory activity against four representative strains. In the in vitro antibacterial activity, the newly synthesized compounds generally displayed better efficacy against Staphylococcus aureus ATCC25923 than the others. In particular, compounds 3, 8 and 10 exerted superior or comparable activity to all the reference drugs. In the cell division inhibitory activity, all the compounds showed the same trend as their in vitro antibacterial activity, exhibiting better activity against S. aureus ATCC25923 than the other strains. Additionally, compounds 3, 6, 7 and 8 displayed potent cell division inhibitory activity with an MIC value of below 1 μg/mL, over 256-fold better than all the reference drugs.
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Affiliation(s)
- Xin Li
- 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
| | - Juzheng Sheng
- Institute of Biochemical and Biotechnological Drug, Key Laboratory of Chemical Biology of Natural Products (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, 44 West Culture Road, Jinan 250012, China
| | - Guihua Huang
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Shandong University, 44 West Culture Road, Jinan 250012, China
| | - Ruixin Ma
- Affiliated Hospital of Medical College, Qingdao University, Qingdao 266003, China
| | - Fengxin Yin
- Institute of Biochemical and Biotechnological Drug, Key Laboratory of Chemical Biology of Natural Products (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, 44 West Culture Road, Jinan 250012, China
| | - Di Song
- 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
| | - Can Zhao
- 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
| | - 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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42
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Dorrani M, Kaul M, Parhi A, LaVoie EJ, Pilch DS, Michniak-Kohn B. TXA497 as a topical antibacterial agent: Comparative antistaphylococcal, skin deposition, and skin permeation studies with mupirocin. Int J Pharm 2014; 476:199-204. [DOI: 10.1016/j.ijpharm.2014.09.033] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 09/08/2014] [Accepted: 09/23/2014] [Indexed: 10/24/2022]
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43
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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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44
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Ojima I, Kumar K, Awasthi D, Vineberg JG. Drug discovery targeting cell division proteins, microtubules and FtsZ. Bioorg Med Chem 2014; 22:5060-77. [PMID: 24680057 PMCID: PMC4156572 DOI: 10.1016/j.bmc.2014.02.036] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 01/25/2014] [Accepted: 02/18/2014] [Indexed: 12/16/2022]
Abstract
Eukaryotic cell division or cytokinesis has been a major target for anticancer drug discovery. After the huge success of paclitaxel and docetaxel, microtubule-stabilizing agents (MSAs) appear to have gained a premier status in the discovery of next-generation anticancer agents. However, the drug resistance caused by MDR, point mutations, and overexpression of tubulin subtypes, etc., is a serious issue associated with these agents. Accordingly, the discovery and development of new-generation MSAs that can obviate various drug resistances has a significant meaning. In sharp contrast, prokaryotic cell division has been largely unexploited for the discovery and development of antibacterial drugs. However, recent studies on the mechanism of bacterial cytokinesis revealed that the most abundant and highly conserved cell division protein, FtsZ, would be an excellent new target for the drug discovery of next-generation antibacterial agents that can circumvent drug-resistances to the commonly used drugs for tuberculosis, MRSA and other infections. This review describes an account of our research on these two fronts in drug discovery, targeting eukaryotic as well as prokaryotic cell division.
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Affiliation(s)
- Iwao Ojima
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, USA; Institute of Chemical Biology & Drug Discovery, Stony Brook University, Stony Brook, NY 11794-3400, USA.
| | - Kunal Kumar
- Institute of Chemical Biology & Drug Discovery, Stony Brook University, Stony Brook, NY 11794-3400, USA
| | - Divya Awasthi
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, USA
| | - Jacob G Vineberg
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, USA
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45
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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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46
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Hampel T, Bruns M, Bayer M, Handgretinger R, Bruchelt G, Brückner R. Synthesis and biological effects of new hybrid compounds composed of benzylguanidines and the alkylating group of busulfan on neuroblastoma cells. Bioorg Med Chem Lett 2014; 24:2728-33. [PMID: 24814532 DOI: 10.1016/j.bmcl.2014.04.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Revised: 04/08/2014] [Accepted: 04/09/2014] [Indexed: 11/27/2022]
Abstract
(131)Iodine-labelled (meta-iodobenzyl)guanidine ([(131)I]-mIBG) and busulfan [butane-1,4-diylbis(methanesulfonate)] are well-established pharmaceuticals in neuroblastoma therapy. We report the design, synthesis, and testing of hybrid molecules-mBBG and pBBG-which combine key structural features of (meta-iodobenzyl)guanidine and busulfan: they contain a benzylguanidine moiety for accumulating in neuroblastoma cells via the noradrenaline transporter and, in the meta- or para-position, respectively, one of the two identical alkylating motives of busulfan for killing cells. Uptake and toxicity of hybrids mBBG and pBBG in human neuroblastoma cells compared favorably to their ancestors [(131)I]-mIBG and busulfan.
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Affiliation(s)
- Thomas Hampel
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, D-79104 Freiburg, Germany
| | - Marietta Bruns
- Children's University Hospital, Hoppe-Seyler-Str.1, D-72076 Tübingen, Germany
| | - Melanie Bayer
- Children's University Hospital, Hoppe-Seyler-Str.1, D-72076 Tübingen, Germany
| | | | - Gernot Bruchelt
- Children's University Hospital, Hoppe-Seyler-Str.1, D-72076 Tübingen, Germany.
| | - Reinhard Brückner
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, D-79104 Freiburg, Germany.
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47
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Bacterial cell division proteins as antibiotic targets. Bioorg Chem 2014; 55:27-38. [PMID: 24755375 DOI: 10.1016/j.bioorg.2014.03.007] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 03/20/2014] [Accepted: 03/24/2014] [Indexed: 11/21/2022]
Abstract
Proteins involved in bacterial cell division often do not have a counterpart in eukaryotic cells and they are essential for the survival of the bacteria. The genetic accessibility of many bacterial species in combination with the Green Fluorescence Protein revolution to study localization of proteins and the availability of crystal structures has increased our knowledge on bacterial cell division considerably in this century. Consequently, bacterial cell division proteins are more and more recognized as potential new antibiotic targets. An international effort to find small molecules that inhibit the cell division initiating protein FtsZ has yielded many compounds of which some are promising as leads for preclinical use. The essential transglycosylase activity of peptidoglycan synthases has recently become accessible to inhibitor screening. Enzymatic assays for and structural information on essential integral membrane proteins such as MraY and FtsW involved in lipid II (the peptidoglycan building block precursor) biosynthesis have put these proteins on the list of potential new targets. This review summarises and discusses the results and approaches to the development of lead compounds that inhibit bacterial cell division.
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48
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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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49
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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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Parhi AK, Zhang Y, Saionz KW, Pradhan P, Kaul M, Trivedi K, Pilch DS, LaVoie EJ. Antibacterial activity of quinoxalines, quinazolines, and 1,5-naphthyridines. Bioorg Med Chem Lett 2013; 23:4968-74. [PMID: 23891185 PMCID: PMC3947850 DOI: 10.1016/j.bmcl.2013.06.048] [Citation(s) in RCA: 115] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 06/12/2013] [Accepted: 06/17/2013] [Indexed: 11/23/2022]
Abstract
Several phenyl substituted naphthalenes and isoquinolines have been identified as antibacterial agents that inhibit FtsZ-Zing formation. In the present study we evaluated the antibacterial of several phenyl substituted quinoxalines, quinazolines and 1,5-naphthyridines against methicillin-sensitive and methicillin-resistant Staphylococcusaureus and vancomycin-sensitive and vancomycin-resistant Enterococcusfaecalis. Some of the more active compounds against S. aureus were evaluated for their effect on FtsZ protein polymerization. Further studies were also performed to assess their relative bactericidal and bacteriostatic activities. The notable differences observed between nonquaternized and quaternized quinoxaline derivatives suggest that differing mechanisms of action are associated with their antibacterial properties.
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Affiliation(s)
- Ajit K. Parhi
- Department of Medicinal Chemistry, Rutgers, The State University of New Jersey, Piscataway, NJ 08854-8020, USA
- TAXIS Pharmaceuticals Inc., North Brunswick, NJ, USA
| | | | | | - Padmanava Pradhan
- Department of Chemistry, The City College and City University of New York, New York, NY 10031-9198, USA
| | - Malvika Kaul
- Department of Pharmacology, The University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA
| | - Kalkal Trivedi
- Department of Pharmacology, The University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA
| | - Daniel S. Pilch
- Department of Pharmacology, The University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA
| | - Edmond J. LaVoie
- Department of Medicinal Chemistry, Rutgers, The State University of New Jersey, Piscataway, NJ 08854-8020, USA
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