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Sarkar D, Manna M, Adhikary A, Reja S, Ghosh S, Saha T, Bhandari S, Kumar Das R. Nanometal surface energy transfer (NSET) from biologically active heterocyclic ligands to silver nanoparticles induces enhanced antimicrobial activity against gram-positive bacteria. Colloids Surf B Biointerfaces 2024; 234:113733. [PMID: 38219637 DOI: 10.1016/j.colsurfb.2023.113733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 12/16/2023] [Accepted: 12/26/2023] [Indexed: 01/16/2024]
Abstract
Herein we report the formation of a nanometal surface energy transfer (NSET) pair between a donor biologically active heterocyclic luminescent ligand such as 3-(1,3-Dioxoisoindolin-2-yl)-N, N-dimethylpropan-1-ammonium perchlorate (S4PNL; λem-408 nm) and an acceptor silver nanoparticle (Ag NP; λabs-406 nm). When the S4PNL ligand interacts with Ag NPs, the quenching in their luminescence intensity at 408 nm is noticed, with a Stern-Volmer constant of 0.8 × 104 M-1. The present donor-acceptor pair displays a binding constant of 2.8 × 104 M-1 and binding sites of 1.12. The current work shows the energy transfer from a molecular dipole (S4PNL) to a nanometal surface (Ag NP) and thus follows the nanometal surface energy transfer (NSET) ruler with an energy transfer efficiency of 80.0%, 50% energy transfer efficiency distance (d0) of 4.9 nm, donor-acceptor distance of 3.4 nm. The alteration in the zeta potential value of S4PNL upon interaction with AgNP clearly demonstrates the strong electrostatic interaction between donor and acceptor. Importantly, the current NSET pair shows enhanced antimicrobial activity against gram-positive bacteria such as Bacillus cereus (B. cereus) in comparison to their parent components i.e. S4PNL ligand and Ag NP. The NSET pair shows maximum inhibition against B. cereus (9202.21 ± 463.26 CFU/ml.) at 10% while minimum inhibition is observed at 0.01% of it (39,887.19 ± 242.67 CFU/ml.).
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Affiliation(s)
- Dilip Sarkar
- Department of Chemistry, University of North Bengal, Darjeeling, West Bengal, India
| | - Mihir Manna
- Centre for Nano Technology, Indian Institute of Technology, Guwahati, Assam, India
| | - Amisha Adhikary
- Department of Chemistry, University of North Bengal, Darjeeling, West Bengal, India
| | - Sahin Reja
- Department of Chemistry, University of North Bengal, Darjeeling, West Bengal, India
| | - Supriyo Ghosh
- Department of Chemistry, University of North Bengal, Darjeeling, West Bengal, India
| | - Tilak Saha
- Department of Chemistry, University of North Bengal, Darjeeling, West Bengal, India
| | - Satyapriya Bhandari
- Department of Chemistry, Kandi Raj College (Govt. Aided), Affiliated to University of Kalyani, Kandi, Murshidabad, India.
| | - Rajesh Kumar Das
- Department of Chemistry, University of North Bengal, Darjeeling, West Bengal, India.
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Nirmal G, Jithin TK, Gopakumar KG, Parthiban R, Nair C. Prevalence and Outcomes of Carbapenem-resistant Bloodstream Infection in Children With Cancer. J Pediatr Hematol Oncol 2023; 45:e678-e682. [PMID: 37146155 DOI: 10.1097/mph.0000000000002679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 03/30/2023] [Indexed: 05/07/2023]
Abstract
INTRODUCTION Carbapenem-resistant (CR) infections cause major morbidity and mortality. Data on CR infections in children with cancer are scarce, especially from the developing world. The aim of this study was to evaluate the characteristics and outcomes of bacteremia with CR organisms (CRO) compared with bacteremia with Carbapenem-sensitive organisms in children with cancer. METHODS This retrospective observational study was conducted in a tertiary pediatric oncology center in South India. Data on all bloodstream infections with Gram-negative organisms (CRO and Carbapenem sensitive-organisms) in children with malignancy ≤14 years of age from August 2017 to July 2021 were retrieved. The outcome was determined as survival and all-cause death 28 days after the date of Bloodstream infection (BSI) onset. RESULTS Sixty-four Gram-negative BSI were identified, with 24% (n=15) in the Carbapenem-Resistant Bloodstream Infection (CR-BSI) group and 76% (n=49) in the Carbapenem-sensitive-Bloodstream Infection group. The patients included 35 males (64%) and 20 females (36%), with ages ranging from 1 year to 14 years (median age: 6.2 y). The most common underlying disease was hematologic malignancy (92.2%, n=59). Children with CR-BSI had a higher incidence of prolonged neutropenia, septic shock, pneumoniae, enterocolitis, altered consciousness, and acute renal failure and were associated with 28-day mortality in univariate analysis. The most common carbapenem-resistant Gram-negative bacilli isolates were Klebsiella species (47%) and Escherichia coli (33%). All carbapenem-resistant isolates were sensitive to colistin, and 33% were sensitive to Tigecycline. The case-fatality rate was 14% (9/64) in our cohort. The overall 28 days mortality was significantly higher in patients with CR-BSI than in those with Carbapenem-sensitive Bloodstream Infection (28-day mortality: 43.8% vs. 4.2%, P =0.001). CONCLUSIONS Bacteremia with CRO has higher mortality in children with cancer. Prolonged neutropenia, pneumoniae, septic shock, enterocolitis, acute renal failure, and altered consciousness were predictors of 28-day mortality in carbapenem-resistant septicemia.
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Affiliation(s)
| | | | | | | | - Chandran Nair
- Department of Clinical Hematology and Medical Oncology, Malabar Cancer Centre, Thalassery, Kerala, India
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3
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Bhattacharjee R, Negi A, Bhattacharya B, Dey T, Mitra P, Preetam S, Kumar L, Kar S, Das SS, Iqbal D, Kamal M, Alghofaili F, Malik S, Dey A, Jha SK, Ojha S, Paiva-Santos AC, Kesari KK, Jha NK. Nanotheranostics to Target Antibiotic-resistant Bacteria: Strategies and Applications. OPENNANO 2023. [DOI: 10.1016/j.onano.2023.100138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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4
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Irfan M, Almotiri A, AlZeyadi ZA. Antimicrobial Resistance and Its Drivers-A Review. Antibiotics (Basel) 2022; 11:1362. [PMID: 36290020 PMCID: PMC9598832 DOI: 10.3390/antibiotics11101362] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/25/2022] [Accepted: 10/01/2022] [Indexed: 07/30/2023] Open
Abstract
Antimicrobial resistance (AMR) is a critical issue in health care in terms of mortality, quality of services, and financial damage. In the battle against AMR, it is crucial to recognize the impacts of all four domains, namely, mankind, livestock, agriculture, and the ecosystem. Many sociocultural and financial practices that are widespread in the world have made resistance management extremely complicated. Several pathways, including hospital effluent, agricultural waste, and wastewater treatment facilities, have been identified as potential routes for the spread of resistant bacteria and their resistance genes in soil and surrounding ecosystems. The overuse of uncontrolled antibiotics and improper treatment and recycled wastewater are among the contributors to AMR. Health-care organizations have begun to address AMR, although they are currently in the early stages. In this review, we provide a brief overview of AMR development processes, the worldwide burden and drivers of AMR, current knowledge gaps, monitoring methodologies, and global mitigation measures in the development and spread of AMR in the environment.
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Antibacterial, Antioxidant and DNA Cleavage Activity Evaluation of Substituted Phenylureido Sulfaguanidine and Sulfamethazine Derivatives. Pharm Chem J 2022. [DOI: 10.1007/s11094-022-02654-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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6
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H. Abdellattif M, Elkamhawy A, Nada H. Synthesis, Biological Evaluation, and In Silico Studies of New Heterocycles Incorporating 4,5,6,7-Tetrabromophthalimide Moiety as Potential Antibacterial and Anticancer Agents. HETEROCYCLES 2022. [DOI: 10.3987/com-21-14535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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7
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Reja S, Mukherjee D, Das P, Kumar P, Das RK. 3-(1,3-Dioxoisoindolin-2-yl)-N,N-dimethylpropan-1-ammonium perchlorate: Synthesis, crystal structure, docking study and in vitro anticancer activity against the human hepatomas cell line (Hep G2). J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.131006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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8
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Simić S, Zukić E, Schmermund L, Faber K, Winkler CK, Kroutil W. Shortening Synthetic Routes to Small Molecule Active Pharmaceutical Ingredients Employing Biocatalytic Methods. Chem Rev 2021; 122:1052-1126. [PMID: 34846124 DOI: 10.1021/acs.chemrev.1c00574] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Biocatalysis, using enzymes for organic synthesis, has emerged as powerful tool for the synthesis of active pharmaceutical ingredients (APIs). The first industrial biocatalytic processes launched in the first half of the last century exploited whole-cell microorganisms where the specific enzyme at work was not known. In the meantime, novel molecular biology methods, such as efficient gene sequencing and synthesis, triggered breakthroughs in directed evolution for the rapid development of process-stable enzymes with broad substrate scope and good selectivities tailored for specific substrates. To date, enzymes are employed to enable shorter, more efficient, and more sustainable alternative routes toward (established) small molecule APIs, and are additionally used to perform standard reactions in API synthesis more efficiently. Herein, large-scale synthetic routes containing biocatalytic key steps toward >130 APIs of approved drugs and drug candidates are compared with the corresponding chemical protocols (if available) regarding the steps, reaction conditions, and scale. The review is structured according to the functional group formed in the reaction.
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Affiliation(s)
- Stefan Simić
- Institute of Chemistry, University of Graz, NAWI Graz, Heinrichstraße 28, 8010 Graz, Austria
| | - Erna Zukić
- Institute of Chemistry, University of Graz, NAWI Graz, Heinrichstraße 28, 8010 Graz, Austria
| | - Luca Schmermund
- Institute of Chemistry, University of Graz, NAWI Graz, Heinrichstraße 28, 8010 Graz, Austria
| | - Kurt Faber
- Institute of Chemistry, University of Graz, NAWI Graz, Heinrichstraße 28, 8010 Graz, Austria
| | - Christoph K Winkler
- Institute of Chemistry, University of Graz, NAWI Graz, Heinrichstraße 28, 8010 Graz, Austria
| | - Wolfgang Kroutil
- Institute of Chemistry, University of Graz, NAWI Graz, Heinrichstraße 28, 8010 Graz, Austria.,Field of Excellence BioHealth─University of Graz, 8010 Graz, Austria.,BioTechMed Graz, 8010 Graz, Austria
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Luna-Reyes I, Pérez-Hernández EG, Delgado-Coello B, Mas-Oliva J. Peptides as Therapeutic Molecules to Neutralize Gram-negative Bacterial Lipopolysaccharides in Sepsis and Septic Shock. Arch Med Res 2021; 52:798-807. [DOI: 10.1016/j.arcmed.2021.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 08/03/2021] [Indexed: 11/16/2022]
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10
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Wu L, Zhou S, Wang G, Yun Y, Liu G, Zhang W. Nanozyme Applications: A Glimpse of Insight in Food Safety. Front Bioeng Biotechnol 2021; 9:727886. [PMID: 34504834 PMCID: PMC8421533 DOI: 10.3389/fbioe.2021.727886] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Accepted: 07/22/2021] [Indexed: 12/28/2022] Open
Abstract
Nanozymes own striking merits, including high enzyme-mimicking activity, good stability, and low cost. Due to the powerful and distinguished functions, nanozymes exhibit widespread applications in the field of biosensing and immunoassay, attracting researchers in various fields to design and engineer nanozymes. Recently, nanozymes have been innovatively used to bridge nanotechnology with analytical techniques to achieve the high sensitivity, specificity, and reproducibility. However, the applications of nanozymes in food applications are seldom reviewed. In this review, we summarize several typical nanozymes and provide a comprehensive description of the history, principles, designs, and applications of nanozyme-based analytical techniques in food contaminants detection. Based on engineering and modification of nanozymes, the food contaminants are classified and then discussed in detail via discriminating the roles of nanozymes in various analytical methods, including fluorescence, colorimetric and electrochemical assay, surface-enhanced Raman scattering, magnetic relaxing sensing, and electrochemiluminescence. Further, representative examples of nanozymes-based methods are highlighted for contaminants analysis and inhibition. Finally, the current challenges and prospects of nanozymes are discussed.
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Affiliation(s)
- Long Wu
- College of Food Science and Engineering, Hainan University, Haikou, China
- Key Laboratory of Fermentation Engineering (Ministry of Education), College of Bioengineering and Food, Hubei University of Technology, Wuhan, China
| | - Shuhong Zhou
- Key Laboratory of Fermentation Engineering (Ministry of Education), College of Bioengineering and Food, Hubei University of Technology, Wuhan, China
| | - Gonglei Wang
- School of Life and Health Sciences, The Chinese University of Hong Kong, Shenzhen, China
| | - Yonghuan Yun
- College of Food Science and Engineering, Hainan University, Haikou, China
| | - Guozhen Liu
- School of Life and Health Sciences, The Chinese University of Hong Kong, Shenzhen, China
| | - Weimin Zhang
- College of Food Science and Engineering, Hainan University, Haikou, China
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Abd El-Sattar NEA, El-Adl K, El-Hashash MA, Salama SA, Elhady MM. Design, synthesis, molecular docking and in silico ADMET profile of pyrano[2,3-d]pyrimidine derivatives as antimicrobial and anticancer agents. Bioorg Chem 2021; 115:105186. [PMID: 34314914 DOI: 10.1016/j.bioorg.2021.105186] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 06/28/2021] [Accepted: 07/14/2021] [Indexed: 12/27/2022]
Abstract
Pyrano[2,3-d]pyrimidine derivatives were synthesized by treating cyclic compounds containing active methylene group with aldehyde and malononitrile in butanol. The behavior of pyrano[2,3-d]pyrimidine towards some electrophlies namely triethylorthoformate followed by nitrogen nucleophiles as isobutylamine, urea, phenylthiourea, p-toluidine, o-phenylenediamine, o-aminophenol, 2-amino-4-methyl-pyridine and acetic acid with the aim of obtaining some interesting non-mixed heterocyclic compounds. All synthesized compounds to some extent have shown good antimicrobial activity against different microbial strains that had been extracted by inhibiting cell wall synthesis. Compound 5b showed the highest antibacterial activities against B. subtilis, S. aureus and E. coli. On the other hand compound 5 g exhibited the highest antibacterial and antifungal activities against P. aeruginosa and A. niger respectively. In addition, they explore cytotoxic potentialities against different cell lines via DNA intercalation and Top-II inhibition. The cytotoxic activities clarify the strong inhibitory activity of derivative 5a against HepG2 cells with IC50 = 2.09 μM, while HCT-116 cells were highly susceptible to derivative 5c with IC50 = 2.61 μM, in the meantime, derivative 5f showed pronounced negative impact against MCF-7 (IC50 = 2.43 μM) when compared with other prepared compounds. All derivatives exhibited higher anticancer activities than doxorubicin against the three cell lines except compound 2 against both HepG2 and MCF-7 and compound 5e against HepG2 cell lines. Compounds 5a, 5c and 5f potently intercalate DNA at IC50 values of 26.96, 27.13 and 29.86 µM respectively, which were more potent than doxorubicin (IC50 value of 31.27 µM). Moreover, compounds 5a, 5c and 5f exhibited very good Topoisomerase II inhibitory activities with IC50 values of 0.752, 0.791 and 0.776 µM respectively, that were more potent than that of doxorubicin (IC50 = 0.94 µM). For a great extent, the molecular modeling studies were in agreement with that of in vitro cytotoxicity activity, DNA binding and Top-II inhibition results.
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Affiliation(s)
- Nour E A Abd El-Sattar
- Department of Chemistry, Faculty of Science, Ain Shams University, Abbassia, Cairo, Egypt.
| | - Khaled El-Adl
- Pharmaceutical Medicinal Chemistry and Drug Design Department, Faculty of Pharmacy (Boys), Al-Azhar University, Nasr City 11884, Cairo, Egypt; Pharmaceutical Chemistry Department, Faculty of Pharmacy, Heliopolis University for Sustainable Development, Cairo, Egypt.
| | - Maher A El-Hashash
- Department of Chemistry, Faculty of Science, Ain Shams University, Abbassia, Cairo, Egypt
| | - Samir A Salama
- Division of Biochemistry, Department of Pharmacology, College of Pharmacy, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Mostafa M Elhady
- Department of Biochemistry, Faculty of Science, Ain Shams University, Abbassia, Cairo, Egypt
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12
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Novel Nitro-Heteroaromatic Antimicrobial Agents for the Control and Eradication of Biofilm-Forming Bacteria. Antibiotics (Basel) 2021; 10:antibiotics10070855. [PMID: 34356776 PMCID: PMC8300661 DOI: 10.3390/antibiotics10070855] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 07/09/2021] [Accepted: 07/10/2021] [Indexed: 12/20/2022] Open
Abstract
The synthesis and biological activity of several novel nitrothiazole, nitrobenzothiazole, and nitrofuran containing antimicrobial agents for the eradication of biofilm-forming Gram-negative and Gram-positive pathogens is described. Nitazoxanide (NTZ), nitrofurantoin, and furazolidone are commercial antimicrobials which were used as models to show how structural modification improved activity toward planktonic bacteria via minimum inhibitory concentration (MIC) assays and biofilms via minimum biofilm eradication concentration (MBEC) assays. Structure–activity relationship (SAR) studies illustrate the ways in which improvements have been made to the aforementioned antimicrobial agents. It is of particular interest in this regard that the introduction of a chloro substituent at the 5-position of NTZ (analog 1b) resulted in marked activity enhancement, as did the replacement of the 2-acetoxy substituent in the latter compound with a basic amine group (analog 7b). It is also of importance that analog 4a, which is a simple methacrylamide, displayed noteworthy activity against S. epidermidis biofilms. These lead compounds identified to have high activity towards biofilms provide promise as starting points in future pro-drug studies.
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Pressure response of carbapenems Klebsiella pneumoniae under antibiotic stress. INFECTION GENETICS AND EVOLUTION 2021; 92:104915. [PMID: 34000446 DOI: 10.1016/j.meegid.2021.104915] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 04/17/2021] [Accepted: 05/11/2021] [Indexed: 11/21/2022]
Abstract
To analyze the drug-resistant phenotype and genetic characteristics of Carbapenem resistant Klebsiella pneumoniae (CRKP) in this region, and to study its different expression profiles in RNA level under the pressure of low levels of antibiotics. Trace dilution method and PCR method were used to detect the antibiotic resistance phenotype and antibiotic resistance gene carrying of CRKP strain, simulate the antibiotic stress process, and RNAseq was used to analyze the transcriptomic changes of CRKP strain. 37 CRKP strains, 27 Carbapenem sensitive Klebsiella pneumoniae (CSKP) CSKP strains and 42 sensitive strains were detected. The antibiotic resistance rate of CRKP strain was significantly higher than that of other drug-resistant strains, and there were many kinds of antibiotic resistance genes. Transcriptomic analysis showed that CRKP strain showed compensatory rise under meropenem stress at low concentration, and the expression of genes related to biofilm formation, pressure induction, pressure tolerance and transcriptional regulation was significantly changed. It was speculated that mrkAB, fimDH, phoHP and pspABCD clusters significantly altered their expression under the antibiotics stress response in CRKP strain. The detection rate of CRKP strain is high in this area. Under low levels of antibiotic stress, CRKP strain can not only survive by synthesizing antibiotic modified enzyme, but also respond by transcriptional regulation and biofilm changes, resulting in stress compensation. The discovery of this phenomenon explains the failure of treatment due to improper use of higher-order antibiotics from the perspective of genetic interaction.
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Altuğ G, Çiftçi Türetken PS, Kalkan S, Topaloğlu B. The Distribution and Antibacterial Activity of Marine Sponge-Associated Bacteria in the Aegean Sea and the Sea of Marmara, Turkey. Curr Microbiol 2021; 78:2275-2290. [PMID: 33929605 DOI: 10.1007/s00284-021-02489-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 02/07/2021] [Indexed: 11/30/2022]
Abstract
The distribution and antibacterial activities of bacteria isolated from fifty-five marine sponge samples collected from the Aegean Sea and the Sea of Marmara were investigated in the period between 2011 and 2013. The antibacterial activities of the methanolic extracts of marine sponge-associated bacteria tested against six pathogenic bacteria: Staphylococcus aureus SA1 and SA2, Brucella melitensis B37, Vibrio vulnificus GK23, Escherichia coli O157:H7 (ATCC 35150), and Salmonella enterica subsp. enterica serovar typhi (ATCC 167), using disk diffusion tests and minimum inhibitory concentration technique. The bacteria isolated from sponges and ambient seawater samples were identified using VITEK 2 Compact 30 automated microbial identification system. All bacterial extracts were exhibited antibacterial activity with various MIC values ranging from 7.8 mg/ mL to 1000 mg/mL against all pathogenic bacteria tested. The antibacterial efficacy rates found to be higher in the Aegean Sea than the Sea of Marmara samples. Fifty-five sponge samples belonging to fifteen species and host twenty-two bacterial species belonging to seven classes in two different marine areas at varying rates were detected. The most common sponge-associated bacterium was recorded as Sphingomonas paucimobilis and Bacillus cereus in the Aegean Sea and the Sea of Marmara, respectively. The composition and counts of the sponge-associated bacteria were found significantly higher than the free-living bacteria in the ambient sea water sampling points of both two marine areas. The presence of high antibacterial potential of sponge-related bacteria obtained in this study provided data for further studies on marine-derived antimicrobial agents, including the effects of environmental differences.
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Affiliation(s)
- Gülşen Altuğ
- Department of Marine Biology, Faculty of Aquatic Science, Istanbul University, Ordu Street, No 8, Laleli, 34470, Istanbul, Turkey.
| | - Pelin S Çiftçi Türetken
- Department of Marine Biology, Faculty of Aquatic Science, Istanbul University, Ordu Street, No 8, Laleli, 34470, Istanbul, Turkey
| | - Samet Kalkan
- Department of Marine Biology, Faculty of Fisheries, Recep Tayyip Erdogan University, Rize, Turkey
| | - Bülent Topaloğlu
- Department of Marine Biology, Faculty of Aquatic Science, Istanbul University, Ordu Street, No 8, Laleli, 34470, Istanbul, Turkey
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Makarov GI, Reshetnikova RV. Investigation of radezolid interaction with non-canonical chloramphenicol binding site by molecular dynamics simulations. J Mol Graph Model 2021; 105:107902. [PMID: 33798835 DOI: 10.1016/j.jmgm.2021.107902] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 03/09/2021] [Accepted: 03/10/2021] [Indexed: 12/12/2022]
Abstract
Radezolid is a promising antibiotic of oxazolidinone family, which is able to overcome effect of some linezolid resistance mechanisms of bacterial ribosomes. The structure of the radezolid complex with ribosomes was never published but, by analogy with linezolid, it is considered to prevent the binding of aminoacyl-tRNA to the A-site of the ribosome large subunit. However, as with linezolid, it can be assumed that radezolid binds to the alternative binding site existing in the A,A/P,P-ribosome. In the present article we have investigated this issue by molecular dynamics simulations and proposed the structure of the radezolid complex with a E. coli ribosome, which is consistent with available data of biochemical investigations of radezolid action.
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Affiliation(s)
- G I Makarov
- South Ural State University, 454080, Chelyabinsk, Russia.
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16
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Othman IMM, Gad-Elkareem MAM, Amr AEGE, Al-Omar MA, Nossier ES, Elsayed EA. Novel heterocyclic hybrids of pyrazole targeting dihydrofolate reductase: design, biological evaluation and in silico studies. J Enzyme Inhib Med Chem 2021; 35:1491-1502. [PMID: 32668994 PMCID: PMC7470138 DOI: 10.1080/14756366.2020.1791842] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
A novel series of pyrazole analogues including hydrazones, pyrazolo[4,3-c]-pyridazines, pyrazolo[3,4-e][1,2,4]triazine and pyrazolo[3,4-d][1,2,3]triazoles was designed, synthesised and screened for their in vitro antimicrobial and DHFR inhibition activity. Compounds bearing benzenesulphonamide moiety incorporated with 3-methyl-5-oxo-1H-pyrazol-4(5H)-ylidene) hydrazine 3a or 6-amino-7-cyano-3-methyl-5H-pyrazolo[4,3-c]pyridazine 6a revealed excellent and broad spectrum antimicrobial activity comparable to ciprofloxacin and amphotericin B as positive antibiotic and antifungal controls, respectively. Furthermore, these derivatives proved to be the most active DHFR inhibitors with IC50 values 0.11 ± 1.05 and 0.09 ± 0.91 µM, in comparison with methotrexate (IC50 = 0.14 ± 1.25 µM). The in silico studies were done to calculate the drug-likeness and toxicity risk parameters of the newly synthesised derivatives. Additionally, the high potency of the pyrazole derivatives bearing sulphonamide against DHFR was confirmed with molecular docking and might be used as an optimum lead for further modification.
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Affiliation(s)
- Ismail M M Othman
- Department of Chemistry, Faculty of Science, Al-Azhar University, Assiut, Egypt
| | - Mohamed A M Gad-Elkareem
- Department of Chemistry, Faculty of Science, Al-Azhar University, Assiut, Egypt.,Department of Chemistry, Faculty of Science and Arts of Baljurashi, Albaha University, Saudi Arabia
| | - Abd El-Galil E Amr
- Pharmaceutical Chemistry Department, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia.,Applied Organic Chemistry Department, National Research Centre, Giza, Egypt
| | - Mohamed A Al-Omar
- Pharmaceutical Chemistry Department, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Eman S Nossier
- Pharmaceutical Medicinal Chemistry Department, Faculty of Pharmacy (Girls), Al-Azhar University, Cairo, Egypt
| | - Elsayed A Elsayed
- Zoology Department, Bioproducts Research Chair, Faculty of Science, King Saud University, Riyadh, Saudi Arabia.,Chemistry of Natural and Microbial Products Department, National Research Centre, Cairo, Egypt
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Ma F, Xu S, Tang Z, Li Z, Zhang L. Use of antimicrobials in food animals and impact of transmission of antimicrobial resistance on humans. BIOSAFETY AND HEALTH 2021. [DOI: 10.1016/j.bsheal.2020.09.004] [Citation(s) in RCA: 92] [Impact Index Per Article: 30.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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18
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2-Methoxy-5-(6-methoxypyridin-3-yl-imino-methyl)phenol and its transition metal complexes as potent antibacterial agents: Synthesis, characterization, theoretical investigations and biological evaluation. RESULTS IN CHEMISTRY 2021. [DOI: 10.1016/j.rechem.2021.100120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Reissier S, Cattoir V. Streptogramins for the treatment of infections caused by Gram-positive pathogens. Expert Rev Anti Infect Ther 2020; 19:587-599. [PMID: 33030387 DOI: 10.1080/14787210.2021.1834851] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
INTRODUCTION Streptogramins (pristinamycin and quinupristin-dalfopristin) can be interesting options for the treatment of infections due to Gram-positive cocci, especially multidrug-resistant isolates. AREAS COVERED This review provides an updated overview of structural and activity characteristics, mechanisms of action and resistance, pharmacokinetic/pharmacodynamic, and clinical use of streptogramins. EXPERT OPINION The streptogramin antibiotics act by inhibition of the bacterial protein synthesis. They are composed of two chemically distinct compounds, namely type A and type B streptogramins, which exert a rapid bactericidal activity against a wide range of Gram-positive bacteria (including methicillin-resistant staphylococci and vancomycin-resistant enterococci). Several mechanisms of resistance have been identified in staphylococci and enterococci but the prevalence of streptogramin resistance among clinical isolates remains very low. Even if only a few randomized clinical trials have been conducted, the efficacy of pristinamycin has been largely demonstrated with an extensive use for 50 years in France and some African countries. Despite its effectiveness in the treatment of severe Gram-positive bacterial infections demonstrated in several studies and the low rate of reported resistance, the clinical use of quinupristin-dalfopristin has remained limited, mainly due to its poor tolerance. Altogether, streptogramins (especially pristinamycin) can be considered as potential alternatives for the treatment of Gram-positive infections.
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Affiliation(s)
| | - Vincent Cattoir
- Université De Rennes 1, Unité Inserm U1230, Rennes, France.,Service De Bactériologie-Hygiène Hospitalière, CHU De Rennes, Rennes, France.,Centre National De Référence De La Résistance Aux Antibiotiques (Laboratoire Associé 'Entérocoques'), CHU De Rennes, Rennes, France
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20
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Chopde HN, Pandhurnekar CP, Yadao BG, Bhattacharya DM, Mungole AJ. Synthesis, characterization and antibacterial activity of 1‐([6‐bromo‐2‐hydroxy‐naphthalen‐1‐yl]arylphenyl)methyl)‐3‐chloro‐4‐(arylphenyl)‐azetidin‐2‐one. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.4056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Himani N. Chopde
- Department of ChemistryDada Ramchand Bakhru Sindhu Mahavidyalaya Nagpur India
| | | | - Babita G. Yadao
- Department of ChemistryDada Ramchand Bakhru Sindhu Mahavidyalaya Nagpur India
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21
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Reddy GM, Kumari AK, Reddy VH, Garcia JR. Novel pyranopyrazole derivatives comprising a benzoxazole core as antimicrobial inhibitors: Design, synthesis, microbial resistance and machine aided results. Bioorg Chem 2020; 100:103908. [PMID: 32413632 DOI: 10.1016/j.bioorg.2020.103908] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 03/20/2020] [Accepted: 04/30/2020] [Indexed: 01/03/2023]
Abstract
From a medical point of view lot of existing antibiotics became unusable because microbial gained strong antibiotic resistance. The combination of two compounds in one core may lead to kill such type of pathogens. Herein, we developed pyranopyrazole derivatives comprising benzoxazole moiety by green approach strategy and studied their antimicrobial performance on four bacteria and two fungi. As a result, most of the compounds delivered reliable toxicity to kill the pathogens. In those,6aexhibited considerable activity against the microbial pathogens. Moreover,compounds 6d, 6l,and6nshowed prominent antibacterial activity. In addition, molecular docking studies of docked compounds revealed the strong bonding interaction with DNA-Gyrase and were docked into the intercalation location of DNA of the DNA-gyrase complex. The molecule bounded to the DNA stabilized by the H bonds, hydrophobic interactions, and π-π interaction. In addition, the linked 5-chlorobenazoxazole structure stabilized by the DT-8 and DG2009 of the F chain with pi-pi interactions. From the computer-aided results, it was observed that compound6a demonstrated maximum docking score -10.0 kcal/mole towards DNA-gyrase. Overall, this investigation suggested that these biologically active compounds can be utilized as leads for preclinical studies with the goal of developing newer antimicrobial drugs.
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Affiliation(s)
- Guda Mallikarjuna Reddy
- Ural Federal University, Chemical Engineering Institute, Yekaterinburg 620002, Russia; Department of Chemistry, State University of Ponta Grossa, Ponta Grossa, Parana State, Brazil
| | - Avula Krishna Kumari
- Natural Product Chemistry, Indian Institute of Chemical Technology, Tarnaka 500007, Hyderabad, India
| | - Vemulapati Hanuman Reddy
- Natural Product Chemistry, Indian Institute of Chemical Technology, Tarnaka 500007, Hyderabad, India
| | - Jarem Raul Garcia
- Department of Chemistry, State University of Ponta Grossa, Ponta Grossa, Parana State, Brazil.
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22
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Antimicrobial activity of bacteria from marine sponge Suberea mollis and bioactive metabolites of Vibrio sp. EA348. Saudi J Biol Sci 2020; 27:1139-1147. [PMID: 32256176 PMCID: PMC7105658 DOI: 10.1016/j.sjbs.2020.02.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 01/27/2020] [Accepted: 02/01/2020] [Indexed: 11/22/2022] Open
Abstract
Discovery of potential bioactive metabolites from sponge-associated bacteria have gained attraction in recent years. The current study explores the potential of sponge (Suberea mollis) associated bacteria against bacterial and fungal pathogens. Sponge samples were collected from Red sea in Obhur region, Jeddah, Saudi Arabia. Of 29 isolated bacteria belong to four different classes i.e. Firmicutes (62%), γ-Proteobacteria (21%), α-Proteobacteria (10%) and Actinobacteria (7%). Among them nineteen (65%) bacterial strains showed antagonistic activity against oomycetes and only 3 (10%) bacterial strains were active against human pathogenic bacteria tested. Most bioactive genera include Bacillus (55%), Pseudovibrio (13%) and Ruegeria (10%). Enzyme production (protease, lipase, amylase, cellualse) was identified in 12 (41%) bacterial strains where potential strains belonging to γ-Proteobacteria and Firmicutes groups. Production of antimicrobial metabolites and hydrolysates in these bacteria suggest their potential role in sponge against pathogens. Further bioactive metabolites from selected strain of Vibrio sp. EA348 were identified using LC-MS and GC–MS analyses. We identified many active metabolites including antibiotics such as Amifloxacin and fosfomycin. Plant growth hormones including Indoleacetic acid and Gibberellin A3 and volatile organic compound such as methyl jasmonate were also detected in this strain. Our results highlighted the importance of marine bacteria inhabiting sponges as potential source of antimicrobial compounds and plant growth hormones of pharmaceutical and agricultural significance.
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23
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Jin Z, Wang L, Gao H, Zhou YH, Liu YH, Tang YZ. Design, synthesis and biological evaluation of novel pleuromutilin derivatives possessing acetamine phenyl linker. Eur J Med Chem 2019; 181:111594. [PMID: 31419741 DOI: 10.1016/j.ejmech.2019.111594] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 07/20/2019] [Accepted: 08/05/2019] [Indexed: 01/30/2023]
Abstract
A series of novel acetamine phenyl pleuromutilin derivatives incorporating 2-aminothiophenol moieties into the C14 side chain were synthesized via acylation reactions under mild conditions. The in vitro antibacterial activities of the synthesized derivatives against three Staphylococcus aureus (MRSA ATCC 43300, ATCC 29213 and AD 3) and two Escherichia coli (ATCC 25922 and 9-1) were evaluated by the broth dilution method. Most of the synthesized derivatives displayed potent activities. Compound 27 was found to be the most active antibacterial derivative against MRSA (minimal inhibitory concentration = 0.015 μg/mL) which may lead to a promising antibacterial drug. Furthermore, compound 27 displayed more rapid bactericidal kinetic than tiamulin in in vitro time-kill studies and possessed a longer PAE than tiamulin against MRSA. The PK properties of compound 27 were then measured. The half life (t1/2), clearance rate (Cl) and the area under the plasma concentration-time curve (AUC0→∞) of compound 27 were 6.88 h, 21.64 L/h/kg and 0.48 μg h/mL, respectively. The in vivo antibacterial activities of compound 27 against MRSA were further evaluated using thigh infection model and systemic infection model. Compound 27 possessed superior antibacterial efficacy to tiamulin against MRSA infection in both model.
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Affiliation(s)
- Zhen Jin
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Le Wang
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Hong Gao
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Ying-Hui Zhou
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Ya-Hong Liu
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - You-Zhi Tang
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China.
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24
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Synthesis, resolution, derivatization and antibacterial activity of chuangxinmycin. Future Med Chem 2019; 11:2877-2890. [PMID: 31533475 DOI: 10.4155/fmc-2019-0209] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Aim: An urgent need for the development of antibiotics with novel structures and unexploited targets. Materials & methods: Racemic chuangxinmycin was obtained via a novel synthesis route. Chiral preparative chromatography was used to separate chuangxinmycin from its epimers, and four stereoisomers were obtained. Fourteen derivatives were synthesized and their antibacterial activities were evaluated against Escherichia coli and Staphylococcus aureus. Results: Synthesized (3S, 4R)-chuangxinmycin showed antibacterial activity against S. aureus with minimum inhibitory concentration of 4-8 μg/ml (17.2-34.3 μM), which were consistent with the antibacterial activity of chuangxinmycin obtained by fermentation. The minimum inhibitory concentrations of other stereoscopic chuangxinmycin species and chuangxinmycin derivatives were >128 μg/ml. Conclusion: Results indicate that the antibacterial activity of chuangxinmycin is dependent on the stereoselectivity of structures, and that the electron cloud density and amphipathic properties of chuangxinmycin have little effect on its antibacterial activity.
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25
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Ding S, Ji J, Zhang M, Yang Y, Wang R, Zhu X, Wang L, Zhong Y, Gao L, Lu M, Liu J, Chen Y. Exploration of the structure–activity relationship and druggability of novel oxazolidinone‐based compounds as Gram‐negative antibacterial agents. Arch Pharm (Weinheim) 2019; 352:e1900129. [DOI: 10.1002/ardp.201900129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 08/05/2019] [Accepted: 08/08/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Shi Ding
- Key Laboratory of New Drug Research and Development of Liaoning Province, College of Pharmacy Liaoning University Shenyang Liaoning China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica Chinese Academy of Sciences Shanghai China
| | - Jing‐Chao Ji
- Key Laboratory of New Drug Research and Development of Liaoning Province, College of Pharmacy Liaoning University Shenyang Liaoning China
| | - Ming‐Juan Zhang
- Key Laboratory of New Drug Research and Development of Liaoning Province, College of Pharmacy Liaoning University Shenyang Liaoning China
| | - Yu‐She Yang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica Chinese Academy of Sciences Shanghai China
| | - Rui Wang
- Central Hospital affiliated to Shenyang Medical College Shenyang Liaoning China
| | - Xing‐Long Zhu
- Key Laboratory of New Drug Research and Development of Liaoning Province, College of Pharmacy Liaoning University Shenyang Liaoning China
| | - Li‐Hong Wang
- Key Laboratory of New Drug Research and Development of Liaoning Province, College of Pharmacy Liaoning University Shenyang Liaoning China
| | - Yi Zhong
- Key Laboratory of New Drug Research and Development of Liaoning Province, College of Pharmacy Liaoning University Shenyang Liaoning China
| | - Le Gao
- Key Laboratory of New Drug Research and Development of Liaoning Province, College of Pharmacy Liaoning University Shenyang Liaoning China
| | - Man Lu
- Key Laboratory of New Drug Research and Development of Liaoning Province, College of Pharmacy Liaoning University Shenyang Liaoning China
| | - Ju Liu
- Key Laboratory of New Drug Research and Development of Liaoning Province, College of Pharmacy Liaoning University Shenyang Liaoning China
| | - Ye Chen
- Key Laboratory of New Drug Research and Development of Liaoning Province, College of Pharmacy Liaoning University Shenyang Liaoning China
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26
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Chu J, Wang Y, Zhao B, Zhang XM, Liu K, Mao L, Kalamiyets E. Isolation and identification of new antibacterial compounds from Bacillus pumilus. Appl Microbiol Biotechnol 2019; 103:8375-8381. [DOI: 10.1007/s00253-019-10083-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/15/2019] [Accepted: 08/16/2019] [Indexed: 01/01/2023]
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27
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Othman IMM, Gad-Elkareem MAM, El-Naggar M, Nossier ES, Amr AEGE. Novel phthalimide based analogues: design, synthesis, biological evaluation, and molecular docking studies. J Enzyme Inhib Med Chem 2019; 34:1259-1270. [PMID: 31287341 PMCID: PMC6691772 DOI: 10.1080/14756366.2019.1637861] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Pyrazolylphthalimide derivative 4 was synthesized and reacted with different reagents to afford the target compounds imidazopyrazoles 5-7, pyrazolopyrimidines 9, 12, 14 and pyrazolotriazines 16, 17 containing phthalimide moiety. The prepared compounds were established by different spectral data and elemental analyses. Additionally, all synthesized derivatives were screened for their antibacterial activity against four types of Gram + ve and Gram-ve strains, and for antifungal activity against two fungi micro-organisms by well diffusion method. Moreover, the antiproliferative activity was tested for all compounds against human liver (HepG-2) cell line in comparison with the reference vinblastine. Moreover, drug-likeness and toxicity risk parameters of the newly synthesized compounds were calculated using in silico studies. The data from structure-actvity relationship (SAR) analysis suggested that phthalimide derivative bearing 3-aminopyrazolone moiety, 4 illustrated the best antimicrobial and antitumor activities and might be considered as a lead for further optimization. To investigate the mechanism of the antimicrobial and anticancer activities, enzymatic assay and molecular docking studies were carried out on E. coli topoisomerase II DNA gyrase B and VEGFR-2 enzymes.
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Affiliation(s)
- Ismail M M Othman
- a Department of Chemistry, Faculty of Science , Al-Azhar University , Assiut , Egypt
| | - Mohamed A M Gad-Elkareem
- a Department of Chemistry, Faculty of Science , Al-Azhar University , Assiut , Egypt.,b Department of Chemistry, Faculty of Science and Arts of Baljurashi , Albaha University , Saudi Arabia
| | - Mohamed El-Naggar
- c Chemistry Department, Faculty of Sciences , University of Sharjah , Sharjah , UAE
| | - Eman S Nossier
- d Pharmaceutical Medicinal Chemistry Department, Faculty of Pharmacy (Girls) , Al-Azhar University , Cairo , Egypt
| | - Abd El-Galil E Amr
- e Pharmaceutical Chemistry Department, Drug Exploration & Development Chair (DEDC) , College of Pharmacy, King Saud University , Riyadh , Saudi Arabia.,f Applied Organic Chemistry Department , National Research Centre , Giza , Egypt
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28
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Li S, Han Z, He J, Gao S, Liu D, Liu L, He J, Huang Y, Xu S, Mao W, Tan Q, Chen C, Li X, Zhang Z, Jiang G, Xu L, Zhang L, Fu J, Li H, Wang Q, Tan L, Li D, Zhou Q, Fu X, Jiang Z, Chen H, Fang W, Zhang X, Li Y, Tong T, Yu Z, Liu Y, Zhi X, Yan T, Zhang X, Imperatori A, Ibrahim M, Novoa NM, Ng CSH, Petersen RH, Chen JS, Fukuchi Y, Brunelli A, Ismail M, Valverde JA, Rodriguez-Lucas C. Society for Translational Medicine expert consensus on the use of antibacterial drugs in thoracic surgery. J Thorac Dis 2019; 10:6356-6374. [PMID: 30622808 DOI: 10.21037/jtd.2018.10.108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Shanqing Li
- Department of Thoracic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Zhijun Han
- Department of Thoracic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Jie He
- Department of Thoracic Surgical Oncology, Cancer Institute & Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; National Cancer Center, Beijing 100021, China
| | - Shugeng Gao
- Department of Thoracic Surgical Oncology, Cancer Institute & Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; National Cancer Center, Beijing 100021, China
| | - Deruo Liu
- Department of Thoracic Surgery, China and Japan Friendship Hospital, Beijing 100096, China
| | - Lunxu Liu
- Department of Cardiovascular and Thoracic Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Jianxing He
- Department of Thoracic Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510230, China.,Guangzhou Institute of Respiratory Disease & China State Key Laboratory of Respiratory Disease & National Clinical Research Center for Respiratory Disease, Guangzhou 510120, China
| | - Yunchao Huang
- Department of Thoracic and Cardiovascular Surgery, The Third Affiliated Hospital of Kunming Medical University (Yunnan Tumor Hospital), Kunming 650118, China
| | - Shidong Xu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin 150086, China
| | - Weimin Mao
- Department of Thoracic Surgery, Zhejiang Cancer Hospital, Hangzhou 310022, China
| | - Qunyou Tan
- Department of Thoracic Surgery, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing 400042, China
| | - Chun Chen
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou 350001, China
| | - Xiaofei Li
- Department of Thoracic Surgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an 710038, China
| | - Zhu Zhang
- Department of Thoracic Surgery, First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, China
| | - Gening Jiang
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital of Tongji University, Shanghai 200433, China
| | - Lin Xu
- Department of Thoracic Surgery, Nanjing Medical University Affiliated Cancer Hospital, Jiangsu Key Laboratory of Molecular and Translational Cancer Research, Cancer Institute of Jiangsu Province, Nanjing 210009, China
| | - Lanjun Zhang
- Department of Thoracic Surgery, Sun Yat-Sen University Cancer Center, Guangzhou 510060, China
| | - Jianhua Fu
- Department of Thoracic Surgery, Sun Yat-Sen University Cancer Center, Guangzhou 510060, China
| | - Hui Li
- Department of Thoracic Surgery, Beijing Chao-Yang Hospital, Beijing 100020, China
| | - Qun Wang
- Department of Thoracic Surgery, Shanghai Zhongshan Hospital of Fudan University, Shanghai 200032, China
| | - Lijie Tan
- Department of Thoracic Surgery, Shanghai Zhongshan Hospital of Fudan University, Shanghai 200032, China
| | - Danqing Li
- Department of Thoracic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Qinghua Zhou
- Department of Lung Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Xiangning Fu
- Department of Thoracic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Zhongmin Jiang
- Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan 250014, China
| | - Haiquan Chen
- Department of Thoracic Surgery, Fudan University Shanghai Cancer Center, Shanghai 200032, China.,Department of Thoracic Surgery, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Wentao Fang
- Department of Thoracic Surgery, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Xun Zhang
- Tianjin Chest Hospital, Tianjin 300051, China
| | - Yin Li
- Department of Thoracic Surgery, Henan Cancer Hospital, Zhengzhou 450008, China
| | - Ti Tong
- Department of Thoracic Surgery, Second Hospital of Jilin University, Changchun 130041, China
| | - Zhentao Yu
- Department of Esophageal Cancer, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - Yongyu Liu
- Department of Thoracic Surgery, Liaoning Cancer Hospital and Institute, Shenyang 110042, China
| | - Xiuyi Zhi
- Department of Thoracic Surgery, Xuanwu Hospital of Capital Medical University, Beijing 100053, China
| | - Tiansheng Yan
- Department of Thoracic Surgery, Peking University Third Hospital, Beijing 100083, China
| | - Xingyi Zhang
- Department of Thoracic Surgery, The Second Hospital of Jilin University, Changchun 130041, China
| | - Andrea Imperatori
- Center for Thoracic Surgery, Department of Medicine and Surgery, School of Medicine, University of Insubria, Varese, Italy
| | - Mohsen Ibrahim
- Division of Thoracic Surgery, Faculty of Medicine and Psychology, Sant'Andrea Hospital, University of Rome 'Sapienza', Rome, Italy
| | - Nuria M Novoa
- Thoracic Surgery Service, University Hospital of Salamanca, 37007 Salamanca, Spain
| | - Calvin Sze Hang Ng
- Department of Surgery, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT, Hong Kong, China
| | - René Horsleben Petersen
- Department of Cardiothoracic Surgery, University Hospital of Copenhagen, Rigshospitalet, Copenhagen, Denmark
| | - Jin-Shing Chen
- Department of Surgery, National Taiwan University Hospital and National Taiwan University College of Medicine, 10002, Taipei
| | | | | | - Mahmoud Ismail
- Department of Thoracic Surgery, Klinikum Ernst von Bergmann, Potsdam, Germany.,Academic Hospital of the Charité-Universitätsmedizin, Humboldt University Berlin, Berlin, Germany
| | - Javier Aragón Valverde
- Departament of Thoracic Surgery, Asturias University Central Hospital, Oviedo, Asturias, Spain
| | - Carlos Rodriguez-Lucas
- Department of Microbiology, Asturias University Central Hospital, Oviedo, Asturias, Spain
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29
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Fang Z, Zheng S, Chan KF, Yuan W, Guo Q, Wu W, Lui HK, Lu Y, Leung YC, Chan TH, Wong KY, Sun N. Design, synthesis and antibacterial evaluation of 2,4-disubstituted-6-thiophenyl-pyrimidines. Eur J Med Chem 2019; 161:141-153. [DOI: 10.1016/j.ejmech.2018.10.039] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 10/14/2018] [Accepted: 10/15/2018] [Indexed: 01/04/2023]
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30
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Sun N, Du RL, Zheng YY, Guo Q, Cai SY, Liu ZH, Fang ZY, Yuan WC, Liu T, Li XM, Lu YJ, Wong KY. Antibacterial activity of 3-methylbenzo[d]thiazol-methylquinolinium derivatives and study of their action mechanism. J Enzyme Inhib Med Chem 2018; 33:879-889. [PMID: 29722581 PMCID: PMC6010097 DOI: 10.1080/14756366.2018.1465055] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 03/09/2018] [Accepted: 04/10/2018] [Indexed: 12/19/2022] Open
Abstract
The increasing incidence of multidrug resistant bacterial infection renders an urgent need for the development of new antibiotics. To develop small molecules disturbing FtsZ activity has been recognized as promising approach to search for antibacterial of high potency systematically. Herein, a series of novel quinolinium derivatives were synthesized and their antibacterial activities were investigated. The compounds show strong antibacterial activities against different bacteria strains including MRSA, VRE and NDM-1 Escherichia coli. Among these derivatives, a compound bearing a 4-fluorophenyl group (A2) exhibited a superior antibacterial activity and its MICs to the drug-resistant strains are found lower than those of methicillin and vancomycin. The biological results suggest that these quinolinium derivatives can disrupt the GTPase activity and dynamic assembly of FtsZ, and thus inhibit bacterial cell division and then cause bacterial cell death. These compounds deserve further evaluation for the development of new antibacterial agents targeting FtsZ.
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Affiliation(s)
- Ning Sun
- The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, P.R. China
- Department of Applied Biology and Chemical Technology and State Key Laboratory of Chirosciences, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, P.R. China
- Institute of Natural Medicine and Green Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, P.R. China
| | - Ruo-Lan Du
- Department of Applied Biology and Chemical Technology and State Key Laboratory of Chirosciences, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, P.R. China
| | - Yuan-Yuan Zheng
- Institute of Natural Medicine and Green Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, P.R. China
| | - Qi Guo
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, P.R. China
| | - Sen-Yuan Cai
- Institute of Natural Medicine and Green Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, P.R. China
| | - Zhi-Hua Liu
- The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, P.R. China
| | - Zhi-Yuan Fang
- The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, P.R. China
| | - Wen-Chang Yuan
- The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, P.R. China
| | - Ting Liu
- The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, P.R. China
| | - Xiao-Mei Li
- The Fifth 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, P.R. China
- Goldenpomelo Biotechnology Co. Ltd, Meizhou514021, P.R. China
| | - Kwok-Yin Wong
- Department of Applied Biology and Chemical Technology and State Key Laboratory of Chirosciences, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, P.R. China
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31
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McGrath AE, Martyn AP, Whittell LR, Dawes FE, Beck JL, Dixon NE, Kelso MJ, Oakley AJ. Crystal structures and biochemical characterization of DNA sliding clamps from three Gram-negative bacterial pathogens. J Struct Biol 2018; 204:396-405. [DOI: 10.1016/j.jsb.2018.10.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 10/20/2018] [Accepted: 10/22/2018] [Indexed: 12/19/2022]
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32
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Gardiner J, Nguyen X, Genet C, Horne MD, Hornung CH, Tsanaktsidis J. Catalytic Static Mixers for the Continuous Flow Hydrogenation of a Key Intermediate of Linezolid (Zyvox). Org Process Res Dev 2018. [DOI: 10.1021/acs.oprd.8b00153] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- James Gardiner
- CSIRO Manufacturing, Bayview Avenue, Clayton, VIC 3169, Australia
| | - Xuan Nguyen
- CSIRO Manufacturing, Bayview Avenue, Clayton, VIC 3169, Australia
| | - Charlotte Genet
- CSIRO Manufacturing, Bayview Avenue, Clayton, VIC 3169, Australia
| | - Mike D. Horne
- CSIRO Mineral Resources, Bayview Avenue, Clayton, VIC 3169, Australia
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Zhang ZS, Huang YZ, Luo J, Jin Z, Liu YH, Tang YZ. Synthesis and antibacterial activities of novel pleuromutilin derivatives bearing an aminothiophenol moiety. Chem Biol Drug Des 2018; 92:1627-1637. [PMID: 29722184 DOI: 10.1111/cbdd.13328] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 03/18/2018] [Accepted: 03/29/2018] [Indexed: 12/30/2022]
Abstract
We synthesized a series of novel thioether pleuromutilin derivatives incorporating 2-aminothiophenol moieties into the C14 side chain via acylation reactions under mild conditions. We evaluated the in-vitro antibacterial activities of the derivatives against methicillin-resistant Staphylococcus aureus (MRSA, ATCC 43300), Staphylococcus aureus (ATCC 29213) and Escherichia coli (ATCC 25922). The majority of the synthesized derivatives possessed moderate antibacterial activities. Compound 8 was found to be the most active antibacterial derivative against MRSA. We conducted docking experiments to understand the possible mode of interactions between compounds 8, 9b, 11a and 50S ribosomal subunit. The docking results proved that there is a reasonable correlation between the binding free energy and the antibacterial activity. Compound 8 was evaluated for its in-vivo antibacterial activity and showed higher efficacy than tiamulin against MRSA in mouse infection model.
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Affiliation(s)
- Zhao-Sheng Zhang
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Yun-Zhen Huang
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Jian Luo
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Zhen Jin
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Ya-Hong Liu
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - You-Zhi Tang
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
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34
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Gawade P, Ghosh P. Genomics driven approach for identification of novel therapeutic targets in Salmonella enterica. Gene 2018; 668:211-220. [DOI: 10.1016/j.gene.2018.05.058] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 05/13/2018] [Accepted: 05/16/2018] [Indexed: 02/06/2023]
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Opoku-Temeng C, Naclerio GA, Mohammad H, Dayal N, Abutaleb NS, Seleem MN, Sintim HO. N-(1,3,4-oxadiazol-2-yl)benzamide analogs, bacteriostatic agents against methicillin- and vancomycin-resistant bacteria. Eur J Med Chem 2018; 155:797-805. [PMID: 29957525 DOI: 10.1016/j.ejmech.2018.06.023] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 05/17/2018] [Accepted: 06/08/2018] [Indexed: 12/11/2022]
Abstract
Various reports of multidrug-resistant bacteria that are immune to all available FDA-approved drugs demand the development of novel chemical scaffolds as antibiotics. From screening a chemical library, we identified compounds with antibacterial activity. The most potent compounds, F6-5 and F6, inhibited growth of various drug-resistant Gram-positive bacterial pathogens at concentrations ranging from 1 μg/mL to 2 μg/mL. Both compounds were active against clinical isolates of methicillin-resistant Staphylococcus aureus (MRSA), vancomycin-intermediate and vancomycin-resistant S. aureus (VISA and VRSA respectively) and vancomycin-resistant Enterococcus faecalis (VRE). Resistance generation experiments revealed that MRSA could develop resistance to the antibiotic ciprofloxacin but not to F6. Excitingly, F6 was found to be non-toxic against mammalian cells. In a mouse skin wound infection model, F6 was equipotent to the antibiotic fusidic acid in reducing MRSA burden.
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Affiliation(s)
- Clement Opoku-Temeng
- Chemistry Department, Institute for Drug Discovery, Purdue University, West Lafayette, IN, 47907, USA; Graduate Program in Biochemistry, University of Maryland, College Park, MD, 20742, USA
| | - George A Naclerio
- Chemistry Department, Institute for Drug Discovery, Purdue University, West Lafayette, IN, 47907, USA
| | - Haroon Mohammad
- Department of Comparative Pathobiology, Purdue University College of Veterinary Medicine, West Lafayette, N47907, USA
| | - Neetu Dayal
- Chemistry Department, Institute for Drug Discovery, Purdue University, West Lafayette, IN, 47907, USA
| | - Nader S Abutaleb
- Department of Comparative Pathobiology, Purdue University College of Veterinary Medicine, West Lafayette, N47907, USA
| | - Mohamed N Seleem
- Department of Comparative Pathobiology, Purdue University College of Veterinary Medicine, West Lafayette, N47907, USA
| | - Herman O Sintim
- Chemistry Department, Institute for Drug Discovery, Purdue University, West Lafayette, IN, 47907, USA.
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Kumar M, Curtis A, Hoskins C. Application of Nanoparticle Technologies in the Combat against Anti-Microbial Resistance. Pharmaceutics 2018; 10:pharmaceutics10010011. [PMID: 29342903 PMCID: PMC5874824 DOI: 10.3390/pharmaceutics10010011] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 01/08/2018] [Accepted: 01/10/2018] [Indexed: 01/01/2023] Open
Abstract
Anti-microbial resistance is a growing problem that has impacted the world and brought about the beginning of the end for the old generation of antibiotics. Increasingly, more antibiotics are being prescribed unnecessarily and this reckless practice has resulted in increased resistance towards these drugs, rendering them useless against infection. Nanotechnology presents a potential answer to anti-microbial resistance, which could stimulate innovation and create a new generation of antibiotic treatments for future medicines. Preserving existing antibiotic activity through novel formulation into or onto nanotechnologies can increase clinical longevity of action against infection. Additionally, the unique physiochemical properties of nanoparticles can provide new anti-bacterial modes of action which can also be explored. Simply concentrating on antibiotic prescribing habits will not resolve the issue but rather mitigate it. Thus, new scientific approaches through the development of novel antibiotics and formulations is required in order to employ a new generation of therapies to combat anti-microbial resistance.
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Affiliation(s)
- Mayur Kumar
- School of Pharmacy, Institute of Science and Technology for Medicine, Keele University, Keele, Staffordshire ST5 6DB, UK.
| | - Anthony Curtis
- School of Pharmacy, Institute of Science and Technology for Medicine, Keele University, Keele, Staffordshire ST5 6DB, UK.
| | - Clare Hoskins
- School of Pharmacy, Institute of Science and Technology for Medicine, Keele University, Keele, Staffordshire ST5 6DB, UK.
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Ding S, Dai RY, Wang WK, Cao Q, Lan LF, Zhou XL, Yang YS. Design, synthesis and structure-activity relationship evaluation of novel LpxC inhibitors as Gram-negative antibacterial agents. Bioorg Med Chem Lett 2018; 28:94-102. [DOI: 10.1016/j.bmcl.2017.12.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 11/28/2017] [Accepted: 12/04/2017] [Indexed: 10/18/2022]
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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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Suppressive drug combinations and their potential to combat antibiotic resistance. J Antibiot (Tokyo) 2017; 70:1033-1042. [PMID: 28874848 DOI: 10.1038/ja.2017.102] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 07/26/2017] [Accepted: 07/28/2017] [Indexed: 12/25/2022]
Abstract
Antibiotic effectiveness often changes when two or more such drugs are administered simultaneously and unearthing antibiotic combinations with enhanced efficacy (synergy) has been a longstanding clinical goal. However, antibiotic resistance, which undermines individual drugs, threatens such combined treatments. Remarkably, it has emerged that antibiotic combinations whose combined effect is lower than that of at least one of the individual drugs can slow or even reverse the evolution of resistance. We synthesize and review studies of such so-called 'suppressive interactions' in the literature. We examine why these interactions have been largely disregarded in the past, the strategies used to identify them, their mechanistic basis, demonstrations of their potential to reverse the evolution of resistance and arguments for and against using them in clinical treatment. We suggest future directions for research on these interactions, aiming to expand the basic body of knowledge on suppression and to determine the applicability of suppressive interactions in the clinic.
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40
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Zaman SB, Hussain MA, Nye R, Mehta V, Mamun KT, Hossain N. A Review on Antibiotic Resistance: Alarm Bells are Ringing. Cureus 2017; 9:e1403. [PMID: 28852600 PMCID: PMC5573035 DOI: 10.7759/cureus.1403] [Citation(s) in RCA: 273] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 06/28/2017] [Indexed: 12/14/2022] Open
Abstract
Antibiotics are the 'wonder drugs' to combat microbes. For decades, multiple varieties of antibiotics have not only been used for therapeutic purposes but practiced prophylactically across other industries such as agriculture and animal husbandry. Uncertainty has arisen, as microbes have become resistant to common antibiotics while the host remains unaware that antibiotic resistance has emerged. The aim of this review is to explore the origin, development, and the current state of antibiotic resistance, regulation, and challenges by examining available literature. We found that antibiotic resistance is increasing at an alarming rate. A growing list of infections i.e., pneumonia, tuberculosis, and gonorrhea are becoming harder and at times impossible to treat while antibiotics are becoming less effective. Antibiotic-resistant infections correlate with the level of antibiotic consumption. Non-judicial use of antibiotics is mostly responsible for making the microbes resistant. The antibiotic treatment repertoire for existing or emerging hard-to-treat multidrug-resistant bacterial infections is limited, resulting in high morbidity and mortality report. This review article reiterates the optimal use of antimicrobial medicines in human and animal health to reduce antibiotic resistance. Evidence from the literature suggests that the knowledge regarding antibiotic resistance in the population is still scarce. Therefore, the need of educating patients and the public is essential to fight against the antimicrobial resistance battle.
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Affiliation(s)
- Sojib Bin Zaman
- Maternal and Child Health Division, International Centre for Diarrhoeal Disease Research, Bangladesh
| | | | - Rachel Nye
- Health Consultant, Botane Skin Activates, Cape Town, South Africa
| | - Varshil Mehta
- Department of Internal Medicine, MGM Medical College, Navi Mumbai, India
| | - Kazi Taib Mamun
- Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh
| | - Naznin Hossain
- Department of Pharmacology, Dhaka Medical College, Dhaka, Bangladesh
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41
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Afifi TH, Okasha RM, Ahmed HEA, Ilaš J, Saleh T, Abd-El-Aziz AS. Structure-activity relationships and molecular docking studies of chromene and chromene based azo chromophores: A novel series of potent antimicrobial and anticancer agents. EXCLI JOURNAL 2017; 16:868-902. [PMID: 28828001 PMCID: PMC5547389 DOI: 10.17179/excli2017-356] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 06/09/2017] [Indexed: 01/31/2023]
Abstract
The design of novel materials with significant biological properties is a main target in drug design research. Chromene compounds represent an interesting medicinal scaffold in drug replacement systems. This report illustrates a successful synthesis and characterization of two novel series of chromene compounds using multi-component reactions. The synthesis of the first example of azo chromophores containing chromene moieties has also been established using the same methodology. The antimicrobial activity of the new molecules has been tested against seven human pathogens including two Gm+ve, two Gm-ve bacteria, and four fungi, and the results of the inhibition zones with minimum inhibitory concentrations were reported as compared to reference drugs. All the designed compounds showed significant potent antimicrobial activities, among of them, four potent compounds 4b, 4c, 13e, and 13i showed promising MIC from 0.007 to 3.9 µg/mL. In addition, antiproliferative analysis against three target cell lines was examined for the novel compounds. Compounds 4a, 4b, 4c, and 7c possessed significant antiproliferative activity against three cell lines with an IC50 of 0.3 to 2 µg/mL. Apoptotic analysis was performed for the most potent compounds via caspase enzyme activity assays as a potential mechanism for their antiproliferative effects. Finally, the computational 2D QSAR and docking simulations were accomplished for structure-activity relationship analyses.
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Affiliation(s)
- Tarek H Afifi
- Chemistry Department, Faculty of Science, Taibah University, 30002, Al-Madinah Al-Munawarah, Saudi Arabia
| | - Rawda M Okasha
- Chemistry Department, Faculty of Science, Taibah University, 30002, Al-Madinah Al-Munawarah, Saudi Arabia
| | - Hany E A Ahmed
- Pharmacognosy and Pharmaceutical Chemistry Department, Pharmacy College, Taibah University, Al-Madinah Al-Munawarah, Saudi Arabia.,Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt
| | - Janez Ilaš
- Faculty of Pharmacy, University of Ljubljana, Aškerceva 7, 1000 Ljubljana, Slovenia
| | - Tarek Saleh
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - Alaa S Abd-El-Aziz
- Chemistry Department, Faculty of Science, University of Prince Edward Island, Charlottetown, Prince Edward Island C1A 4P3, Canada
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42
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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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43
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Sun N, Du RL, Zheng YY, Huang BH, Guo Q, Zhang RF, Wong KY, Lu YJ. Antibacterial activity of N-methylbenzofuro[3,2-b]quinoline and N-methylbenzoindolo[3,2-b]-quinoline derivatives and study of their mode of action. Eur J Med Chem 2017; 135:1-11. [PMID: 28426995 DOI: 10.1016/j.ejmech.2017.04.018] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2016] [Revised: 04/01/2017] [Accepted: 04/10/2017] [Indexed: 11/17/2022]
Abstract
The emergence of multidrug-resistant bacteria causes an urgent need for new generation of antibiotics, which may have a different mechanism of inhibition or killing action from the existing. Targeting at the inhibition of bacterial cell division via the control of FtsZ function is one of the effective and promising approaches. Some natural extracts from plants such as sanguinarine and berberine (analogs of pyridinium compounds) are known to alter FtsZ function. In this study, a series of novel quaternary pyridinium compounds was constructed based on the N-methylbenzofuro[3,2-b]quinoline and N-methylbenzoindolo[3,2-b]-quinoline derivatives and their antibacterial activity against nine significant pathogens was investigated using broth microdilution method. In the in vitro assay, the compounds showed strong antibacterial activities against various testing strains, which include some drug-resistant strains such as methicillin-resistant S. aureus and vancomycin-resistant E. faecium. Our results of morphology change of B. subtilis cells and molecular docking proved that the compounds functioned as an effective inhibitor to suppress FtsZ polymerization and FtsZ GTPase activity and thus the compound stops cell division and cause cell death through interacting with C-terminal interdomain cleft of FtsZ.
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Affiliation(s)
- Ning Sun
- Institute of Natural Medicine and Green Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, PR China; Department of Applied Biology and Chemical Technology, State Key Laboratory of Chirosciences, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, PR China
| | - Ruo-Lan Du
- Department of Applied Biology and Chemical Technology, State Key Laboratory of Chirosciences, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, PR China
| | - Yuan-Yuan Zheng
- Institute of Natural Medicine and Green Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Bao-Hua Huang
- Institute of Natural Medicine and Green Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, PR China.
| | - Qi Guo
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, 54 South Xianlie Road, Guangzhou, 510060, PR China
| | - Rui-Fang Zhang
- Institute of Natural Medicine and Green Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Kwok-Yin Wong
- Department of Applied Biology and Chemical Technology, State Key Laboratory of Chirosciences, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, PR China
| | - Yu-Jing Lu
- Institute of Natural Medicine and Green Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, PR China.
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Bond TEH, Sorenson AE, Schaeffer PM. Functional characterisation of Burkholderia pseudomallei biotin protein ligase: A toolkit for anti-melioidosis drug development. Microbiol Res 2017; 199:40-48. [PMID: 28454708 DOI: 10.1016/j.micres.2017.03.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 03/06/2017] [Accepted: 03/15/2017] [Indexed: 01/17/2023]
Abstract
Burkholderia pseudomallei (Bp) is the causative agent of melioidosis. The bacterium is responsible for 20% of community-acquired sepsis cases and 40% of sepsis-related mortalities in northeast Thailand, and is intrinsically resistant to aminoglycosides, macrolides, rifamycins, cephalosporins, and nonureidopenicillins. There is no vaccine and its diagnosis is problematic. Biotin protein ligase (BirA) which is essential for fatty acid synthesis has been proposed as a drug target in bacteria. Very few bacterial BirA have been characterized, and a better understanding of these enzymes is necessary to further assess their value as drug targets. BirA within the Burkholderia genus have not yet been investigated. We present for the first time the cloning, expression, purification and functional characterisation of the putative Bp BirA and orthologous B. thailandensis (Bt) biotin carboxyl carrier protein (BCCP) substrate. A GFP-tagged Bp BirA was produced and applied for the development of a high-throughput (HT) assay based on our differential scanning fluorimetry of GFP-tagged proteins (DSF-GTP) principle as well as an electrophoretic mobility shift assay. Our biochemical data in combination with the new HT DSF-GTP and biotinylation activity assay could facilitate future drug screening efforts against this drug-resistant organism.
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Affiliation(s)
- Thomas E H Bond
- Comparative Genomics Centre, James Cook University, DB21, James Cook Drive, Townsville, QLD 4811, Australia
| | - Alanna E Sorenson
- Comparative Genomics Centre, James Cook University, DB21, James Cook Drive, Townsville, QLD 4811, Australia
| | - Patrick M Schaeffer
- Comparative Genomics Centre, James Cook University, DB21, James Cook Drive, Townsville, QLD 4811, Australia.
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45
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Kawai T, Kazuhiko I, Takaya N, Yamaguchi Y, Kishii R, Kohno Y, Kurasaki H. Sulfonamide-based non-alkyne LpxC inhibitors as Gram-negative antibacterial agents. Bioorg Med Chem Lett 2017; 27:1045-1049. [DOI: 10.1016/j.bmcl.2016.12.059] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 11/07/2016] [Accepted: 12/22/2016] [Indexed: 10/20/2022]
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46
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Wang B, Huang W, Zhou J, Tang X, Chen Y, Peng C, Han B. Drug design based on pentaerythritol tetranitrate reductase: synthesis and antibacterial activity of Pogostone derivatives. Org Biomol Chem 2017; 15:6548-6556. [DOI: 10.1039/c7ob01429e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We performed molecular docking studies of Pogostone with PETNR and analyzed structure–activity relationships, which guided the structure design and the subsequent facile organocatalytic synthesis of Pogostone derivatives.
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Affiliation(s)
- Biao Wang
- State Key Laboratory Breeding Base of Systematic Research
- Development and Utilization of Chinese Medicine Resources
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
- China
| | - Wei Huang
- Ministry of Education Key Laboratory of Standardization of Chinese Medicine
- School of Pharmacy
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
- China
| | - Jin Zhou
- State Key Laboratory Breeding Base of Systematic Research
- Development and Utilization of Chinese Medicine Resources
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
- China
| | - Xue Tang
- State Key Laboratory Breeding Base of Systematic Research
- Development and Utilization of Chinese Medicine Resources
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
- China
| | - Yang Chen
- Ministry of Education Key Laboratory of Standardization of Chinese Medicine
- School of Pharmacy
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
- China
| | - Cheng Peng
- State Key Laboratory Breeding Base of Systematic Research
- Development and Utilization of Chinese Medicine Resources
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
- China
| | - Bo Han
- State Key Laboratory Breeding Base of Systematic Research
- Development and Utilization of Chinese Medicine Resources
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
- China
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Ali SM, Siddiqui R, Ong SK, Shah MR, Anwar A, Heard PJ, Khan NA. Identification and characterization of antibacterial compound(s) of cockroaches (Periplaneta americana). Appl Microbiol Biotechnol 2016; 101:253-286. [PMID: 27743045 DOI: 10.1007/s00253-016-7872-2] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 08/21/2016] [Accepted: 09/16/2016] [Indexed: 12/20/2022]
Abstract
Infectious diseases remain a significant threat to human health, contributing to more than 17 million deaths, annually. With the worsening trends of drug resistance, there is a need for newer and more powerful antimicrobial agents. We hypothesized that animals living in polluted environments are potential sources of antimicrobials. Under polluted milieus, organisms such as cockroaches encounter different types of microbes, including superbugs. Such creatures survive the onslaught of superbugs and are able to ward off disease by producing antimicrobial substances. Here, we characterized antibacterial properties in extracts of various body organs of cockroaches (Periplaneta americana) and showed potent antibacterial activity in crude brain extract against methicillin-resistant Staphylococcus aureus and neuropathogenic Escherichia coli K1. The size-exclusion spin columns revealed that the active compound(s) are less than 10 kDa in molecular mass. Using cytotoxicity assays, it was observed that pre-treatment of bacteria with lysates inhibited bacteria-mediated host cell cytotoxicity. Using spectra obtained with LC-MS on Agilent 1290 infinity liquid chromatograph, coupled with an Agilent 6460 triple quadruple mass spectrometer, tissues lysates were analysed. Among hundreds of compounds, only a few homologous compounds were identified that contained the isoquinoline group, chromene derivatives, thiazine groups, imidazoles, pyrrole-containing analogs, sulfonamides, furanones, and flavanones and known to possess broad-spectrum antimicrobial properties and anti-inflammatory, anti-tumour, and analgesic properties. Further identification, characterization, and functional studies using individual compounds can act as a breakthrough in developing novel therapeutics against various pathogens including superbugs.
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Affiliation(s)
- Salwa Mansur Ali
- Department of Biological Sciences, Faculty of Science and Technology, Sunway University, 47500, Subang Jaya, Selangor, Malaysia
| | - Ruqaiyyah Siddiqui
- Department of Biological Sciences, Faculty of Science and Technology, Sunway University, 47500, Subang Jaya, Selangor, Malaysia
| | - Seng-Kai Ong
- Department of Biological Sciences, Faculty of Science and Technology, Sunway University, 47500, Subang Jaya, Selangor, Malaysia
| | - Muhammad Raza Shah
- International Center for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, Karachi, Pakistan
| | - Ayaz Anwar
- International Center for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, Karachi, Pakistan
| | - Peter J Heard
- Department of Biological Sciences, Faculty of Science and Technology, Sunway University, 47500, Subang Jaya, Selangor, Malaysia
| | - Naveed Ahmed Khan
- Department of Biological Sciences, Faculty of Science and Technology, Sunway University, 47500, Subang Jaya, Selangor, Malaysia.
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Synthesis and Antimicrobial Evaluation of Amixicile-Based Inhibitors of the Pyruvate-Ferredoxin Oxidoreductases of Anaerobic Bacteria and Epsilonproteobacteria. Antimicrob Agents Chemother 2016; 60:3980-7. [PMID: 27090174 DOI: 10.1128/aac.00670-16] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 04/11/2016] [Indexed: 01/04/2023] Open
Abstract
Amixicile is a promising derivative of nitazoxanide (an antiparasitic therapeutic) developed to treat systemic infections caused by anaerobic bacteria, anaerobic parasites, and members of the Epsilonproteobacteria (Campylobacter and Helicobacter). Amixicile selectively inhibits pyruvate-ferredoxin oxidoreductase (PFOR) and related enzymes by inhibiting the function of the vitamin B1 cofactor (thiamine pyrophosphate) by a novel mechanism. Here, we interrogate the amixicile scaffold, guided by docking simulations, direct PFOR inhibition assays, and MIC tests against Clostridium difficile, Campylobacter jejuni, and Helicobacter pylori Docking simulations revealed that the nitro group present in nitazoxanide interacts with the protonated N4'-aminopyrimidine of thiamine pyrophosphate (TPP). The ortho-propylamine on the benzene ring formed an electrostatic interaction with an aspartic acid moiety (B456) of PFOR that correlated with improved PFOR-inhibitory activity and potency by MIC tests. Aryl substitution with electron-withdrawing groups and substitutions of the propylamine with other alkyl amines or nitrogen-containing heterocycles both improved PFOR inhibition and, in many cases, biological activity against C. difficile Docking simulation results correlate well with mechanistic enzymology and nuclear magnetic resonance (NMR) studies that show members of this class of antimicrobials to be specific inhibitors of vitamin B1 function by proton abstraction, which is both novel and likely to limit mutation-based drug resistance.
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Kurasaki H, Tsuda K, Shinoyama M, Takaya N, Yamaguchi Y, Kishii R, Iwase K, Ando N, Nomura M, Kohno Y. LpxC Inhibitors: Design, Synthesis, and Biological Evaluation of Oxazolidinones as Gram-negative Antibacterial Agents. ACS Med Chem Lett 2016; 7:623-8. [PMID: 27326338 DOI: 10.1021/acsmedchemlett.6b00057] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 04/05/2016] [Indexed: 02/02/2023] Open
Abstract
Herein we report a scaffold-hopping approach to identify a new scaffold with a zinc binding headgroup. Structural information was used to give novel oxazolidinone-based LpxC inhibitors. In particular, the most potent compound, 23j, showed a low efflux ratio, nanomolar potencies against E. coli LpxC enzyme, and excellent antibacterial activity against E. coli and K. pneumoniae. Computational docking was used to predict the interaction between 23j and E. coli LpxC, suggesting that the interactions with C207 and C63 contribute to the strong activity. These results provide new insights into the design of next-generation LpxC inhibitors.
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Affiliation(s)
- Haruaki Kurasaki
- Watarase Research Center, Kyorin Pharmaceutical Co., Ltd., 1848 Nogi, Nogi-machi, Shimotsuga-gun, Tochigi 329-0114, Japan
| | - Kosuke Tsuda
- Watarase Research Center, Kyorin Pharmaceutical Co., Ltd., 1848 Nogi, Nogi-machi, Shimotsuga-gun, Tochigi 329-0114, Japan
| | - Mariko Shinoyama
- Watarase Research Center, Kyorin Pharmaceutical Co., Ltd., 1848 Nogi, Nogi-machi, Shimotsuga-gun, Tochigi 329-0114, Japan
| | - Noriko Takaya
- Watarase Research Center, Kyorin Pharmaceutical Co., Ltd., 1848 Nogi, Nogi-machi, Shimotsuga-gun, Tochigi 329-0114, Japan
| | - Yuko Yamaguchi
- Watarase Research Center, Kyorin Pharmaceutical Co., Ltd., 1848 Nogi, Nogi-machi, Shimotsuga-gun, Tochigi 329-0114, Japan
| | - Ryuta Kishii
- Watarase Research Center, Kyorin Pharmaceutical Co., Ltd., 1848 Nogi, Nogi-machi, Shimotsuga-gun, Tochigi 329-0114, Japan
| | - Kazuhiko Iwase
- Watarase Research Center, Kyorin Pharmaceutical Co., Ltd., 1848 Nogi, Nogi-machi, Shimotsuga-gun, Tochigi 329-0114, Japan
| | - Naoki Ando
- Watarase Research Center, Kyorin Pharmaceutical Co., Ltd., 1848 Nogi, Nogi-machi, Shimotsuga-gun, Tochigi 329-0114, Japan
| | - Masahiro Nomura
- Watarase Research Center, Kyorin Pharmaceutical Co., Ltd., 1848 Nogi, Nogi-machi, Shimotsuga-gun, Tochigi 329-0114, Japan
| | - Yasushi Kohno
- Watarase Research Center, Kyorin Pharmaceutical Co., Ltd., 1848 Nogi, Nogi-machi, Shimotsuga-gun, Tochigi 329-0114, Japan
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Zhang M, Kong X, Zheng J, Wan JB, Wang Y, Hu Y, Shao R. Research and development of antibiotics: insights from patents and citation network. Expert Opin Ther Pat 2016; 26:617-27. [PMID: 26986226 DOI: 10.1517/13543776.2016.1167877] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
INTRODUCTION Bacterial resistance to antibiotics develops at an alarming rate and leads to the increasing morbidity and health-care costs in recent years. However, the global research and development (R&D) of antibiotics has fallen behind the emergence and spread of bacterial resistance and the world is heading towards a 'post-antibiotic era'. In this context, systematic understanding of the technology landscape and evolving process of antibiotic R&D may help to provide insights for discovering future antibiotics more rationally. AREAS COVERED Patents and patent citations are broadly believed to be powerful tools in representing the technology advances and capturing technology flows. In all, 707 U.S. patents related to antibiotic R&D are collected and analyzed. Furthermore, patent citations are visualized by a network-based approach, while the inter-relationship between patented technologies on antibiotics is further revealed. EXPERT OPINION The current dry pipeline of antibiotic development requires substantial awareness and political support. It is essential to build an attractive and supportive environment for investment. Thus, a new antibiotic business model is needed to chase the balance between the market-oriented investment and public health goals. Additionally, drug development targeting Gram-negative bacteria, especially resistant Gram-negative bacteria, demands attentions from stakeholders because of their unmet medical needs.
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Affiliation(s)
- Meng Zhang
- a School of International Pharmaceutical Business , China Pharmaceutical University , Nanjing , Jiangsu , China
| | - Xiangjun Kong
- b Institute of Chinese Medical Sciences, State Key Laboratory of Quality Research in Chinese Medicine , University of Macau , Macao , China
| | - Jun Zheng
- c Faculty of Health Sciences , University of Macau , Macao , China
| | - Jian-Bo Wan
- b Institute of Chinese Medical Sciences, State Key Laboratory of Quality Research in Chinese Medicine , University of Macau , Macao , China
| | - Yitao Wang
- b Institute of Chinese Medical Sciences, State Key Laboratory of Quality Research in Chinese Medicine , University of Macau , Macao , China
| | - Yuanjia Hu
- b Institute of Chinese Medical Sciences, State Key Laboratory of Quality Research in Chinese Medicine , University of Macau , Macao , China
| | - Rong Shao
- a School of International Pharmaceutical Business , China Pharmaceutical University , Nanjing , Jiangsu , China
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