1
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Yuce M, Ates B, Yasar NI, Sungur FA, Kurkcuoglu O. A computational workflow to determine drug candidates alternative to aminoglycosides targeting the decoding center of E. coli ribosome. J Mol Graph Model 2024; 131:108817. [PMID: 38976944 DOI: 10.1016/j.jmgm.2024.108817] [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: 03/22/2024] [Revised: 05/08/2024] [Accepted: 07/03/2024] [Indexed: 07/10/2024]
Abstract
The global antibiotic resistance problem necessitates fast and effective approaches to finding novel inhibitors to treat bacterial infections. In this study, we propose a computational workflow to identify plausible high-affinity compounds from FDA-approved, investigational, and experimental libraries for the decoding center on the small subunit 30S of the E. coli ribosome. The workflow basically consists of two molecular docking calculations on the intact 30S, followed by molecular dynamics (MD) simulations coupled with MM-GBSA calculations on a truncated ribosome structure. The parameters used in the molecular docking suits, Glide and AutoDock Vina, as well as in the MD simulations with Desmond were carefully adjusted to obtain expected interactions for the ligand-rRNA complexes. A filtering procedure was followed, considering a fingerprint based on aminoglycoside's binding site on the 30S to obtain seven hit compounds either with different clinical usages or aminoglycoside derivatives under investigation, suggested for in vitro studies. The detailed workflow developed in this study promises an effective and fast approach for the estimation of binding free energies of large protein-RNA and ligand complexes.
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Affiliation(s)
- Merve Yuce
- Istanbul Technical University, Department of Chemical Engineering, Istanbul, 34469, Turkey.
| | - Beril Ates
- Istanbul Technical University, Department of Chemical Engineering, Istanbul, 34469, Turkey.
| | - Nesrin Isil Yasar
- Istanbul Technical University, Computational Science and Engineering Division, Informatics Institute, Istanbul, 34469, Turkey.
| | - Fethiye Aylin Sungur
- Istanbul Technical University, Computational Science and Engineering Division, Informatics Institute, Istanbul, 34469, Turkey.
| | - Ozge Kurkcuoglu
- Istanbul Technical University, Department of Chemical Engineering, Istanbul, 34469, Turkey.
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2
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Li Y, Niu H, Huang L, Zhang L, Mao L, Wan P, Ma Z, Peng X, Wan K, Zeng Z. Research Note: Synergistic effect of isopropoxy benzene guanidine and colistin against mcr-1-positive Escherichia coli in vitro and in duck intestine infection models. Poult Sci 2024; 103:104018. [PMID: 39043027 DOI: 10.1016/j.psj.2024.104018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 06/01/2024] [Accepted: 06/19/2024] [Indexed: 07/25/2024] Open
Abstract
Colistin (CST) is considered as "agent of last resort" against gram-negative bacteria as feed additive. Its clinical effectiveness has reduced since the emergence of mcr-1 gene in ducks. Isopropoxy benzene guanidine (IBG), a new guanidine derivative, showed positive effects on improving animal weights and alleviating intestinal pathogens, therefore, the objective of this study was to evaluate the effect of this compound supplement with CST in ducks and explore the possibilities in feed additive. A total of fifteen duck-origin Escherichia coli carrying the mcr-1 gene were included in this study. A checkerboard microdilution assay was used to evaluate the in vitro antibacterial activity of IBG combined with CST against mcr-1-positive E. coli. A 3-by-2 time-kill array of IBG (16, 32, and 64 μg/mL) and CST (1/2 MIC and 1/4 MIC) over 24 hours was utilized to characterize the activity of the agents alone and in combination against E. coli strain 1 in vitro. The intestinal colonization model was used to evaluate the in vivo effect of IBG combined with CST. These results indicated that the combination of IBG plus CST showed a synergistic effect against all clinical isolates (FICI < 0.5). The bacterial burden was reduced by more than 2 log10 CFU/mL when E. coli strain 1 was tested with 1/2 MIC CST plus 64 μg/mL IBG for 24 h. Further experiments in vivo demonstrated that the CST combined with IBG was able to increase duck weights, reduced intestinal pathogenic E. coli and showed a synergistic antibacterial effect. Combination of CST (4 mg/kg b.w.) plus IBG (32 or 64 mg/kg b.w.) achieved 1.84 to 3.29 log10 CFU/g killing after 7 d of therapy, which was significantly different from that in the challenge control group (p<0.05). In summary, our study demonstrated the potential use of IBG as feed additive for veterinary purposes in ducks and provided new insights into overcoming resistance in the future.
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Affiliation(s)
- Yafei Li
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
| | - Huijun Niu
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Lang Huang
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Lingxuan Zhang
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Lingxiang Mao
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Peng Wan
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Zhenbao Ma
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Xianfeng Peng
- Guangzhou Insighter Biotechnology Co., Ltd., Guangzhou 510663, China
| | - Kai Wan
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
| | - Zhenling Zeng
- 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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Kim SH, Hind CK, Fernandes GFS, Wu J, Semenya D, Clifford M, Marsh C, Anselmi S, Mason AJ, Bruce KD, Sutton JM, Castagnolo D. Development of Novel Membrane Disrupting Lipoguanidine Compounds Sensitizing Gram-Negative Bacteria to Antibiotics. ACS Med Chem Lett 2024; 15:239-249. [PMID: 38352828 PMCID: PMC10860194 DOI: 10.1021/acsmedchemlett.3c00460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 12/20/2023] [Accepted: 01/02/2024] [Indexed: 02/16/2024] Open
Abstract
A new class of amphiphilic molecules, the lipoguanidines, designed as hybrids of guanidine and fatty acid compounds, has been synthesized and developed. The new molecules present both a guanidine polar head and a lipophilic tail that allow them to disrupt bacterial membranes and to sensitize Gram-negative bacteria to the action of the narrow-spectrum antibiotics rifampicin and novobiocin. The lipoguanidine 5g sensitizes Klebsiella pneumonia, Acinetobacter baumannii, Pseudomonas aeruginosa, and Escherichia coli to rifampicin, thereby reducing the antibiotic minimum inhibitory concentrations (MIC) up to 256-fold. Similarly, 5g is able to potentiate novobiocin up to 64-fold, thereby showing a broad spectrum of antibiotic potentiating activity. Toxicity and mechanism studies revealed the potential of 5g to work synergistically with rifampicin through the disruption of bacterial membranes without affecting eukaryotic cells.
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Affiliation(s)
- Seong-Heun Kim
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
- Institute
of Pharmaceutical Science, School of Cancer & Pharmaceutical Science, King’s College London, 150 Stamford Street, London SE1 9NH, United Kingdom
| | - Charlotte K. Hind
- Antimicrobial
Discovery, Development and Diagnostics, Vaccine Development and Evaluation
Centre, UKHSA Porton Down, Salisbury SP4 0JG, United Kingdom
| | - Guilherme F. S. Fernandes
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Jingyue Wu
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Dorothy Semenya
- Institute
of Pharmaceutical Science, School of Cancer & Pharmaceutical Science, King’s College London, 150 Stamford Street, London SE1 9NH, United Kingdom
| | - Melanie Clifford
- Antimicrobial
Discovery, Development and Diagnostics, Vaccine Development and Evaluation
Centre, UKHSA Porton Down, Salisbury SP4 0JG, United Kingdom
| | - Caleb Marsh
- Antimicrobial
Discovery, Development and Diagnostics, Vaccine Development and Evaluation
Centre, UKHSA Porton Down, Salisbury SP4 0JG, United Kingdom
| | - Silvia Anselmi
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - A. James Mason
- Institute
of Pharmaceutical Science, School of Cancer & Pharmaceutical Science, King’s College London, 150 Stamford Street, London SE1 9NH, United Kingdom
| | - Kenneth D. Bruce
- Institute
of Pharmaceutical Science, School of Cancer & Pharmaceutical Science, King’s College London, 150 Stamford Street, London SE1 9NH, United Kingdom
| | - J. Mark Sutton
- Institute
of Pharmaceutical Science, School of Cancer & Pharmaceutical Science, King’s College London, 150 Stamford Street, London SE1 9NH, United Kingdom
- Antimicrobial
Discovery, Development and Diagnostics, Vaccine Development and Evaluation
Centre, UKHSA Porton Down, Salisbury SP4 0JG, United Kingdom
| | - Daniele Castagnolo
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
- Institute
of Pharmaceutical Science, School of Cancer & Pharmaceutical Science, King’s College London, 150 Stamford Street, London SE1 9NH, United Kingdom
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4
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Lu Y, Qiao W, Xue Y, Hong X, Jin Y, Li J, Peng X, Zeng D, Zeng Z. Antibacterial activity of isopropoxy benzene guanidine against Riemerella anatipestifer. Front Pharmacol 2024; 15:1347250. [PMID: 38370472 PMCID: PMC10870170 DOI: 10.3389/fphar.2024.1347250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 01/22/2024] [Indexed: 02/20/2024] Open
Abstract
Introduction: Riemerella anatipestifer (R. anatipestifer) is an important pathogen in waterfowl, leading to substantial economic losses. In recent years, there has been a notable escalation in the drug resistance rate of R. anatipestifer. Consequently, there is an imperative need to expedite the development of novel antibacterial medications to effectively manage the infection caused by R. anatipestifer. Methods: This study investigated the in vitro and in vivo antibacterial activities of a novel substituted benzene guanidine analog, namely, isopropoxy benzene guanidine (IBG), against R. anatipestifer by using the microdilution method, time-killing curve, and a pericarditis model. The possible mechanisms of these activities were explored. Results and Discussion: The minimal inhibitory concentration (MIC) range of IBG for R. anatipestifer was 0.5-2 μg/mL. Time-killing curves showed a concentration-dependent antibacterial effect. IBG alone or in combination with gentamicin significantly reduced the bacterial load of R. anatipestifer in the pericarditis model. Serial-passage mutagenicity assays showed a low probability for developing IBG resistance. Mechanistic studies suggested that IBG induced membrane damage by binding to phosphatidylglycerol and cardiolipin, leading to an imbalance in membrane potential and the transmembrane proton gradient, as well as the decreased of intracellular adenosine triphosphate. In summary, IBG is a potential antibacterial for controlling R. anatipestifer infections.
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Affiliation(s)
- Yixing Lu
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, Guangzhou, China
| | - Weimei Qiao
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, Guangzhou, China
| | - Yaqian Xue
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, Guangzhou, China
| | - Xiaoxin Hong
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, Guangzhou, China
| | - Yuhang Jin
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, Guangzhou, China
| | - Jie Li
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, Guangzhou, China
| | - Xianfeng Peng
- Guangzhou Insighter Biotechnology Co, Ltd., Guangzhou, China
| | - Dongping Zeng
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, Guangzhou, China
| | - Zhenling Zeng
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, Guangzhou, China
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5
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Gomes AR, Varela CL, Pires AS, Tavares-da-Silva EJ, Roleira FMF. Synthetic and natural guanidine derivatives as antitumor and antimicrobial agents: A review. Bioorg Chem 2023; 138:106600. [PMID: 37209561 DOI: 10.1016/j.bioorg.2023.106600] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 04/15/2023] [Accepted: 05/05/2023] [Indexed: 05/22/2023]
Abstract
Guanidines are fascinating small nitrogen-rich organic compounds, which have been frequently associated with a wide range of biological activities. This is mainly due to their interesting chemical features. For these reasons, for the past decades, researchers have been synthesizing and evaluating guanidine derivatives. In fact, there are currently on the market several guanidine-bearing drugs. Given the broad panoply of pharmacological activities displayed by guanidine compounds, in this review, we chose to focus on antitumor, antibacterial, antiviral, antifungal, and antiprotozoal activities presented by several natural and synthetic guanidine derivatives, which are undergoing preclinical and clinical studies from January 2010 to January 2023. Moreover, we also present guanidine-containing drugs currently in the market for the treatment of cancer and several infectious diseases. In the preclinical and clinical setting, most of the synthesized and natural guanidine derivatives are being evaluated as antitumor and antibacterial agents. Even though DNA is the most known target of this type of compounds, their cytotoxicity also involves several other different mechanisms, such as interference with bacterial cell membranes, reactive oxygen species (ROS) formation, mitochondrial-mediated apoptosis, mediated-Rac1 inhibition, among others. As for the compounds already used as pharmacological drugs, their main application is in the treatment of different types of cancer, such as breast, lung, prostate, and leukemia. Guanidine-containing drugs are also being used for the treatment of bacterial, antiprotozoal, antiviral infections and, recently, have been proposed for the treatment of COVID-19. To conclude, the guanidine group is a privileged scaffold in drug design. Its remarkable cytotoxic activities, especially in the field of oncology, still make it suitable for a deeper investigation to afford more efficient and target-specific drugs.
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Affiliation(s)
- Ana R Gomes
- Univ Coimbra, CIEPQPF, Faculty of Pharmacy, Laboratory of Pharmaceutical Chemistry, Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, 3000-548 Coimbra, Portugal; Univ Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Institute of Biophysics, Faculty of Medicine, Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, 3000-548 Coimbra, Portugal
| | - Carla L Varela
- Clinical Academic Center of Coimbra (CACC), Praceta Professor Mota Pinto, 3004-561 Coimbra, Portugal; Univ Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), Rua Larga, 3004-504 Coimbra, Portugal; Univ Coimbra, CIEPQPF, Faculty of Medicine, Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, 3000-548 Coimbra, Portugal
| | - Ana S Pires
- Univ Coimbra, Coimbra Institute for Clinical and Biomedical Research (iCBR) area of Environment Genetics and Oncobiology (CIMAGO), Institute of Biophysics, Faculty of Medicine, Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, 3000-548 Coimbra, Portugal; Clinical Academic Center of Coimbra (CACC), Praceta Professor Mota Pinto, 3004-561 Coimbra, Portugal; Univ Coimbra, Center for Innovative Biomedicine and Biotechnology (CIBB), Rua Larga, 3004-504 Coimbra, Portugal
| | - Elisiário J Tavares-da-Silva
- Univ Coimbra, CIEPQPF, Faculty of Pharmacy, Laboratory of Pharmaceutical Chemistry, Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, 3000-548 Coimbra, Portugal.
| | - Fernanda M F Roleira
- Univ Coimbra, CIEPQPF, Faculty of Pharmacy, Laboratory of Pharmaceutical Chemistry, Azinhaga de Santa Comba, Pólo III - Pólo das Ciências da Saúde, 3000-548 Coimbra, Portugal.
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6
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Li J, Zhang X, Han N, Wan P, Zhao F, Xu T, Peng X, Xiong W, Zeng Z. Mechanism of Action of Isopropoxy Benzene Guanidine against Multidrug-Resistant Pathogens. Microbiol Spectr 2023; 11:e0346922. [PMID: 36475769 PMCID: PMC9927234 DOI: 10.1128/spectrum.03469-22] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 11/14/2022] [Indexed: 12/13/2022] Open
Abstract
The increasing emergence of antibiotic resistance is an urgent threat to global health care; thus, there is a need for new therapeutics. Guanidine is the preferred functional group for antimicrobial design and development. Herein, the potential antibacterial activity of the guanidine derivative isopropoxy benzene guanidine (IBG) against multidrug-resistant (MDR) bacteria was discovered. The synergistic antibacterial activity of IBG and colistin was determined by checkerboard assay, time-killing curve, and mouse experiments. The antibacterial mechanism of IBG was verified in fluorescent probe experiments, intracellular oxidative phosphorylation assays, and transcriptome analysis. The results showed that IBG displays efficient antibacterial activity against Gram-positive pathogens and Gram-negative pathogens with permeabilized outer membranes. Further mechanistic studies showed that IBG triggers cytoplasmic membrane damage by binding to phosphatidylglycerol and cardiolipin, leading to the dissipation of proton motive force and accumulation of intracellular ATP. IBG combined with low levels of colistin enhances bacterial outer membrane permeability and increases the accumulation of reactive oxygen species, as further evidenced by transcriptome analysis. Furthermore, the efficacy of IBG with colistin against MDR Escherichia coli in three infection models was demonstrated. Together, these results suggest that IBG is a promising adjuvant of colistin, providing an alternative approach to address the prevalent infections caused by MDR Gram-negative pathogens. IMPORTANCE As antibiotic discovery stagnates, the world is facing a growing menace from the emergence of bacteria that are resistant to almost all available antibiotics. The key to winning this race is to explore distinctive mechanisms of antibiotics. Thus, novel efficient antibacterial agents and alternative strategies are urgently required to fill the void in antibiotic development. Compared with the large amount of money and time required to develop new agents, the antibiotic adjuvant strategy is a promising approach to inhibit bacterial resistance and increase killing of bacteria. In this study, we found that the guanidine derivatives IBG not only displayed efficient antibacterial activities against Gram-positive bacteria but also restored colistin susceptibility of Gram-negative pathogens as an antibiotic adjuvant. More in-depth study showed that IBG is a potential lead to overcome antibiotic resistance, providing new insight into future antibiotic discovery and development.
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Affiliation(s)
- Jie Li
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- National Laboratory of Safety Evaluation (Environmental Assessment) of Veterinary Drugs, South China Agricultural University, Guangzhou, China
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou, China
| | - Xiufeng Zhang
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- National Laboratory of Safety Evaluation (Environmental Assessment) of Veterinary Drugs, South China Agricultural University, Guangzhou, China
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou, China
| | - Ning Han
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- National Laboratory of Safety Evaluation (Environmental Assessment) of Veterinary Drugs, South China Agricultural University, Guangzhou, China
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou, China
| | - Peng Wan
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- National Laboratory of Safety Evaluation (Environmental Assessment) of Veterinary Drugs, South China Agricultural University, Guangzhou, China
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou, China
| | - Feifei Zhao
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- National Laboratory of Safety Evaluation (Environmental Assessment) of Veterinary Drugs, South China Agricultural University, Guangzhou, China
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou, China
| | - Tiantian Xu
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- National Laboratory of Safety Evaluation (Environmental Assessment) of Veterinary Drugs, South China Agricultural University, Guangzhou, China
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou, China
| | - Xianfeng Peng
- Guangzhou Insighter Biotechnology Co., Ltd., Guangzhou, China
| | - Wenguang Xiong
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- National Laboratory of Safety Evaluation (Environmental Assessment) of Veterinary Drugs, South China Agricultural University, Guangzhou, China
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou, China
| | - Zhenling Zeng
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- National Laboratory of Safety Evaluation (Environmental Assessment) of Veterinary Drugs, South China Agricultural University, Guangzhou, China
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, South China Agricultural University, Guangzhou, China
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Fortuna A, Gonçalves-Pereira R, Costa PJ, Jorda R, Vojáčková V, Gonzalez G, Heise NV, Csuk R, Oliveira MC, Xavier NM. Synthesis and Exploitation of the Biological Profile of Novel Guanidino Xylofuranose Derivatives. ChemMedChem 2022; 17:e202200180. [PMID: 35576106 DOI: 10.1002/cmdc.202200180] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/09/2022] [Indexed: 11/07/2022]
Abstract
The synthesis and biological evaluation of novel guanidino sugars as isonucleoside analogs is described. 5-Guanidino xylofuranoses containing 3- O -saturated/unsaturated hydrocarbon or aromatic-containing moieties were accessed from 5-azido xylofuranoses via reduction followed by guanidinylation with N , N '-bis( tert -butoxycarbonyl)- N ''-triflylguanidine. Molecules comprising novel types of isonucleosidic structures including 5-guanidino 3- O -methyl-branched N -benzyltriazole isonucleosides and a guanidinomethyltriazole 3'- O -dodecyl xylofuranos-5'-yl isonucleoside were accessed. The guanidinomethyltriazole derivative and a 3- O -dodecyl ( N -Boc)guanidino xylofuranose were revealed as selective inhibitors of acetylcholinesterase ( K i = 22.87 and 7.49 µM, respectively). The latter also showed moderate antiproliferative effects in chronic myeloid leukemia (K562) and breast cancer (MCF-7) cells. An aminomethyltriazole 5'-isonucleoside was the most potent molecule with low micromolar GI 50 values in both cells (GI 50 = 6.33 μM, 8.45 μM), similar to that of the drug 5-fluorouracil in MCF-7 cells. Moreover, the most bioactive compounds showed low toxicity in human fibroblasts, further indicating their interest as promising lead molecules.
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Affiliation(s)
- Andreia Fortuna
- Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Ed. C8, 5° Piso, Campo Grande, 1749-016, Lisboa, Portugal
- BioISI - Biosystems & Integrative Sciences Institute, Faculdade de Ciências, Universidade de Lisboa, Ed. C8, Campo Grande, 1749-016, Lisboa, Portugal
| | - Rita Gonçalves-Pereira
- Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Ed. C8, 5° Piso, Campo Grande, 1749-016, Lisboa, Portugal
| | - Paulo J Costa
- BioISI - Biosystems & Integrative Sciences Institute, Faculdade de Ciências, Universidade de Lisboa, Ed. C8, Campo Grande, 1749-016, Lisboa, Portugal
| | - Radek Jorda
- Department of Experimental Biology, Palacky University Olomouc, Faculty of Science, Šlechtitelů 27, 78371, Olomouc, Czech Republic
| | - Veronika Vojáčková
- Department of Experimental Biology, Palacky University Olomouc, Faculty of Science, Šlechtitelů 27, 78371, Olomouc, Czech Republic
| | - Gabriel Gonzalez
- Department of Experimental Biology, Palacky University Olomouc, Faculty of Science, Šlechtitelů 27, 78371, Olomouc, Czech Republic
| | - Niels V Heise
- Bereich Organische Chemie, Martin-Luther-Universität Halle-Wittenberg, Kurt-Mothes-Str. 2, 06120, Halle (Saale), Germany
| | - René Csuk
- Bereich Organische Chemie, Martin-Luther-Universität Halle-Wittenberg, Kurt-Mothes-Str. 2, 06120, Halle (Saale), Germany
| | - M Conceição Oliveira
- Centro de Química Estrutural, Institute of Molecular Sciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
| | - Nuno M Xavier
- Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Ed. C8, 5° Piso, Campo Grande, 1749-016, Lisboa, Portugal
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8
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Zahra U, Saeed A, Abdul Fattah T, Flörke U, Erben MF. Recent trends in chemistry, structure, and various applications of 1-acyl-3-substituted thioureas: a detailed review. RSC Adv 2022; 12:12710-12745. [PMID: 35496330 PMCID: PMC9041296 DOI: 10.1039/d2ra01781d] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Accepted: 04/14/2022] [Indexed: 12/02/2022] Open
Abstract
The interest in acyl thioureas has continually been escalating owing to their extensive applications in diverse fields, such as synthetic precursors of new heterocycles, pharmacological and materials science, and technology. These scaffolds exhibit a wide variety of biological activities such as antitumor, enzyme inhibitory, anti-bacterial, anti-fungal, and anti-malarial activities and find utilization as chemosensors, adhesives, flame retardants, thermal stabilizers, antioxidants, polymers and organocatalysts. In addition, the synthesis, and applications of coordination complexes of these ligands have also been overviewed. The current review is a continuation of our previous efforts in this area, focusing on the recent advancements during the period 2017 to present. This review encapsulates the recently designed acyl thioureas, and their crystal structures, metal complexes and various applications from 2017 to present, including pharmacological aspects, chemosensing and heterogenous catalysis.![]()
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Affiliation(s)
- Urage Zahra
- Department of Chemistry, Quaid-i-Azam University-45320 Islamabad Pakistan
| | - Aamer Saeed
- Department of Chemistry, Quaid-i-Azam University-45320 Islamabad Pakistan
| | | | - Ulrich Flörke
- Department Chemie, Fakultät für Naturwissenschaften, Universität Paderborn Warburgerstrasse 100 D-33098 Paderborn Germany
| | - Mauricio F Erben
- CEQUINOR (UNLP, CONICET-CCT La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata Bv. 120 1465 La Plata 1900 Argentina
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9
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Spirescu VA, Niculescu AG, Slave Ș, Bîrcă AC, Dorcioman G, Grumezescu V, Holban AM, Oprea OC, Vasile BȘ, Grumezescu AM, Nica IC, Stan MS, Andronescu E. Anti-Biofilm Coatings Based on Chitosan and Lysozyme Functionalized Magnetite Nanoparticles. Antibiotics (Basel) 2021; 10:1269. [PMID: 34680849 PMCID: PMC8532956 DOI: 10.3390/antibiotics10101269] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 10/13/2021] [Accepted: 10/15/2021] [Indexed: 12/25/2022] Open
Abstract
Biofilms represent a common and increasingly challenging problem in healthcare practices worldwide, producing persistent and difficult to manage infections. Researchers have started developing antibiotic-free treatment alternatives in order to decrease the risk of resistant microbial strain selection and for the efficient management of antibiotic tolerant biofilm infections. The present study reports the fabrication and characterization of magnetite-based nanostructured coatings for producing biofilm-resistant surfaces. Specifically, magnetite nanoparticles (Fe3O4) were functionalized with chitosan (CS) and were blended with lysozyme (LyZ) and were deposited using the matrix-assisted pulsed laser evaporation (MAPLE) technique. A variety of characterization techniques were employed to investigate the physicochemical properties of both nanoparticles and nanocoatings. The biological characterization of the coatings assessed through cell viability and antimicrobial tests showed biocompatibility on osteoblasts as well as antiadhesive and antibiofilm activity against both Gram-negative and Gram-positive bacterial strains and no cytotoxic effect against human-cultured diploid cells.
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Affiliation(s)
- Vera Alexandra Spirescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, University Politehnica of Bucharest, 011061 Bucharest, Romania; (V.A.S.); (A.-G.N.); (Ș.S.); (A.C.B.); (B.Ș.V.); (E.A.)
| | - Adelina-Gabriela Niculescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, University Politehnica of Bucharest, 011061 Bucharest, Romania; (V.A.S.); (A.-G.N.); (Ș.S.); (A.C.B.); (B.Ș.V.); (E.A.)
| | - Ștefan Slave
- Department of Science and Engineering of Oxide Materials and Nanomaterials, University Politehnica of Bucharest, 011061 Bucharest, Romania; (V.A.S.); (A.-G.N.); (Ș.S.); (A.C.B.); (B.Ș.V.); (E.A.)
| | - Alexandra Cătalina Bîrcă
- Department of Science and Engineering of Oxide Materials and Nanomaterials, University Politehnica of Bucharest, 011061 Bucharest, Romania; (V.A.S.); (A.-G.N.); (Ș.S.); (A.C.B.); (B.Ș.V.); (E.A.)
| | - Gabriela Dorcioman
- Lasers Department, National Institute for Lasers, Plasma and Radiation Physics, 077125 Magurele, Romania; (G.D.); (V.G.)
| | - Valentina Grumezescu
- Lasers Department, National Institute for Lasers, Plasma and Radiation Physics, 077125 Magurele, Romania; (G.D.); (V.G.)
| | - Alina Maria Holban
- Department of Microbiology and Immunology, Faculty of Biology, University of Bucharest, 077206 Bucharest, Romania;
| | - Ovidiu-Cristian Oprea
- Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry, Faculty of Applied Chemistry and Materials Science, Politehnica University of Bucharest, 011061 Bucharest, Romania;
| | - Bogdan Ștefan Vasile
- Department of Science and Engineering of Oxide Materials and Nanomaterials, University Politehnica of Bucharest, 011061 Bucharest, Romania; (V.A.S.); (A.-G.N.); (Ș.S.); (A.C.B.); (B.Ș.V.); (E.A.)
| | - Alexandru Mihai Grumezescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, University Politehnica of Bucharest, 011061 Bucharest, Romania; (V.A.S.); (A.-G.N.); (Ș.S.); (A.C.B.); (B.Ș.V.); (E.A.)
- Research Institute of the University of Bucharest—ICUB, University of Bucharest, 050657 Bucharest, Romania
- Academy of Romanian Scientists, Ilfov No. 3, 50044 Bucharest, Romania; (I.C.N.); (M.S.S.)
| | - Ionela Cristina Nica
- Academy of Romanian Scientists, Ilfov No. 3, 50044 Bucharest, Romania; (I.C.N.); (M.S.S.)
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania
| | - Miruna Silvia Stan
- Academy of Romanian Scientists, Ilfov No. 3, 50044 Bucharest, Romania; (I.C.N.); (M.S.S.)
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania
| | - Ecaterina Andronescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, University Politehnica of Bucharest, 011061 Bucharest, Romania; (V.A.S.); (A.-G.N.); (Ș.S.); (A.C.B.); (B.Ș.V.); (E.A.)
- Academy of Romanian Scientists, Ilfov No. 3, 50044 Bucharest, Romania; (I.C.N.); (M.S.S.)
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10
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Synthesis, Antibacterial and Antifungal Activity of New 3-Aryl-5 H-pyrrolo[1,2- a]imidazole and 5 H-Imidazo[1,2- a]azepine Quaternary Salts. Molecules 2021; 26:molecules26144253. [PMID: 34299528 PMCID: PMC8305969 DOI: 10.3390/molecules26144253] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 07/07/2021] [Accepted: 07/12/2021] [Indexed: 11/17/2022] Open
Abstract
A series of novel 3-aryl-5H-pyrrolo[1,2-a]imidazole and 5H-imidazo[1,2-a]azepine quaternary salts were synthesized in 58-85% yields via the reaction of 3-aryl-6, 7-dihydro-5H-pyrrolo[1,2-a]imidazoles or 3-aryl-6,7,8,9-tetrahydro-5H-imidazo[1,2-a]azepines and various alkylating reagents. All compounds were characterized by 1H NMR, 13C NMR, and LC-MS. The conducted screening studies of the in vitro antimicrobial activity of the new quaternary salts derivatives established that 15 of the 18 newly synthesized compounds show antibacterial and antifungal activity. Synthesized 3-(3,4-dichlorohenyl)-1-[(4-phenoxyphenylcarbamoyl)-methyl]-6,7-dihydro-5H-pyrrolo[1,2-a]imidazol-1-ium chloride 6c possessed a broad activity spectrum towards Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae, Acinetobacter baumannii, and Cryptococcus neoformans, with a high hemolytic activity against human red blood cells and cytotoxicity against HEK-293. However, compound 6c is characterized by a low in vivo toxicity in mice (LD50 > 2000 mg/kg).
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Shatalov DO, Kedik SA, Ivanov IS, Aydakova AV, Akhmedova DA, Minenkov DS, Beliakov SV, Herbst A, Greiner L, Kozlovskaya LI, Volok VP. Development of a Promising Method for Producing Oligomeric Mixture of Branched Alkylene Guanidines to Improve Substance Quality and Evaluate Their Antiviral Activity against SARS-CoV-2. Molecules 2021; 26:3472. [PMID: 34200418 PMCID: PMC8201297 DOI: 10.3390/molecules26113472] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/19/2021] [Accepted: 06/02/2021] [Indexed: 11/16/2022] Open
Abstract
This paper reports the synthesis of branched alkylene guanidines using microfluidic technologies. We describe the preparation of guanidine derivatives at lower temperatures, and with significantly less time than that required in the previously applicable method. Furthermore, the use of microfluidics allows the attainment of high-purity products with a low residual monomer content, which can expand the range of applications of this class of compounds. For all the samples obtained, the molecular-weight characteristics are calculated, based on which the optimal condensation conditions are established. Additionally, in this work, the antiviral activity of the alkylene guanidine salt against the SARS-CoV-2 virus is confirmed.
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Affiliation(s)
- Denis O. Shatalov
- Institute of Fine Chemical Technologies Named after Lomonosov, MIREA—Russian Technological University, 119571 Moscow, Russia; (D.O.S.); (S.A.K.); (I.S.I.); (A.V.A.); (S.V.B.)
| | - Stanislav A. Kedik
- Institute of Fine Chemical Technologies Named after Lomonosov, MIREA—Russian Technological University, 119571 Moscow, Russia; (D.O.S.); (S.A.K.); (I.S.I.); (A.V.A.); (S.V.B.)
| | - Ivan S. Ivanov
- Institute of Fine Chemical Technologies Named after Lomonosov, MIREA—Russian Technological University, 119571 Moscow, Russia; (D.O.S.); (S.A.K.); (I.S.I.); (A.V.A.); (S.V.B.)
| | - Anna V. Aydakova
- Institute of Fine Chemical Technologies Named after Lomonosov, MIREA—Russian Technological University, 119571 Moscow, Russia; (D.O.S.); (S.A.K.); (I.S.I.); (A.V.A.); (S.V.B.)
- Institute of Pharmaceutical Technology, 119571 Moscow, Russia
| | - Diana A. Akhmedova
- Institute of Fine Chemical Technologies Named after Lomonosov, MIREA—Russian Technological University, 119571 Moscow, Russia; (D.O.S.); (S.A.K.); (I.S.I.); (A.V.A.); (S.V.B.)
- Institute of Pharmaceutical Technology, 119571 Moscow, Russia
| | | | - Sergei V. Beliakov
- Institute of Fine Chemical Technologies Named after Lomonosov, MIREA—Russian Technological University, 119571 Moscow, Russia; (D.O.S.); (S.A.K.); (I.S.I.); (A.V.A.); (S.V.B.)
| | | | - Lasse Greiner
- Mannheim University of Applied Sciences, 68163 Mannheim, Germany;
| | - Liubov I. Kozlovskaya
- FSBSI “Chumakov FSC R&D IBP RAS”, 108819 Moscow, Russia; (L.I.K.); (V.P.V.)
- Institute of Translational Medicine and Biotechnology, Sechenov Moscow State Medical University, 117418 Moscow, Russia
| | - Viktor P. Volok
- FSBSI “Chumakov FSC R&D IBP RAS”, 108819 Moscow, Russia; (L.I.K.); (V.P.V.)
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Hao S, Yang D, Zhao L, Shi F, Ye G, Fu H, Lin J, Guo H, He R, Li J, Chen H, Khan MF, Li Y, Tang H. EGCG-Mediated Potential Inhibition of Biofilm Development and Quorum Sensing in Pseudomonas aeruginosa. Int J Mol Sci 2021; 22:ijms22094946. [PMID: 34066609 PMCID: PMC8125375 DOI: 10.3390/ijms22094946] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 04/25/2021] [Accepted: 04/27/2021] [Indexed: 12/13/2022] Open
Abstract
Pseudomonas aeruginosa (P. aeruginosa), one of the dangerous multidrug resistance pathogens, orchestrates virulence factors production through quorum sensing (QS). Since the exploration of QS inhibitors, targeting virulence to circumvent bacterial pathogenesis without causing significant growth inhibition is a promising approach to treat P. aeruginosa infections. The present study has evaluated the anti-QS and anti-infective activity of epigallocatechin-3-gallate (EGCG), a bioactive ingredient of the traditional green tea, against P. aeruginosa. EGCG showed significant inhibitory effects on the development of biofilm, protease, elastase activity, swimming, and swarming motility, which was positively related to the production of C4-AHL. The expression of QS-related and QS-regulated virulence factors genes was also evaluated. Quantitative PCR analysis showed that EGCG significantly reduced the expression of las, rhl, and PQS genes and was highly correlated with the alterations of C4-AHL production. In-vivo experiments demonstrated that EGCG treatment reduced P. aeruginosa pathogenicity in Caenorhabditis elegans (C. elegans). EGCG increased the survival of C. elegans by 23.25%, 30.04%, and 36.35% in a dose-dependent manner. The findings of this study strongly suggest that EGCG could be a potential candidate for QS inhibition as an anti-virulence compound against bacterial infection.
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Affiliation(s)
- Suqi Hao
- College of Veterinary Medicine, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China; (S.H.); (D.Y.); (L.Z.); (F.S.); (G.Y.); (H.F.); (J.L.); (H.G.); (R.H.)
| | - Dan Yang
- College of Veterinary Medicine, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China; (S.H.); (D.Y.); (L.Z.); (F.S.); (G.Y.); (H.F.); (J.L.); (H.G.); (R.H.)
| | - Ling Zhao
- College of Veterinary Medicine, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China; (S.H.); (D.Y.); (L.Z.); (F.S.); (G.Y.); (H.F.); (J.L.); (H.G.); (R.H.)
| | - Fei Shi
- College of Veterinary Medicine, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China; (S.H.); (D.Y.); (L.Z.); (F.S.); (G.Y.); (H.F.); (J.L.); (H.G.); (R.H.)
| | - Gang Ye
- College of Veterinary Medicine, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China; (S.H.); (D.Y.); (L.Z.); (F.S.); (G.Y.); (H.F.); (J.L.); (H.G.); (R.H.)
| | - Hualin Fu
- College of Veterinary Medicine, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China; (S.H.); (D.Y.); (L.Z.); (F.S.); (G.Y.); (H.F.); (J.L.); (H.G.); (R.H.)
| | - Juchun Lin
- College of Veterinary Medicine, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China; (S.H.); (D.Y.); (L.Z.); (F.S.); (G.Y.); (H.F.); (J.L.); (H.G.); (R.H.)
| | - Hongrui Guo
- College of Veterinary Medicine, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China; (S.H.); (D.Y.); (L.Z.); (F.S.); (G.Y.); (H.F.); (J.L.); (H.G.); (R.H.)
| | - Ran He
- College of Veterinary Medicine, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China; (S.H.); (D.Y.); (L.Z.); (F.S.); (G.Y.); (H.F.); (J.L.); (H.G.); (R.H.)
| | - Jianlong Li
- College of Food Science, Sichuan Agricultural University, Chengdu 611130, China;
| | - Hongwei Chen
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China;
| | - Muhammad Faraz Khan
- Department of Botany, Faculty of Basic and Applied Sciences, University of Poonch Rawalakot, Rawalakot 12350, Pakistan;
| | - Yinglun Li
- College of Veterinary Medicine, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China; (S.H.); (D.Y.); (L.Z.); (F.S.); (G.Y.); (H.F.); (J.L.); (H.G.); (R.H.)
- Correspondence: (Y.L.); (H.T.)
| | - Huaqiao Tang
- College of Veterinary Medicine, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China; (S.H.); (D.Y.); (L.Z.); (F.S.); (G.Y.); (H.F.); (J.L.); (H.G.); (R.H.)
- Correspondence: (Y.L.); (H.T.)
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Pendem VB, Tamminana R, Nannapaneni M. Iron-promoted sulfur sequestration for the substituent-dependent regioselective synthesis of tetrazoles and guanidines. J Sulphur Chem 2021. [DOI: 10.1080/17415993.2021.1909589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
| | - Ramana Tamminana
- Department of Chemistry, GITAM Deemed University, Bengaluru, India
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Amer MA, Wasfi R, Attia AS, Ramadan MA. Indole Derivatives Obtained from Egyptian Enterobacter sp. Soil Isolates Exhibit Antivirulence Activities against Uropathogenic Proteus mirabilis. Antibiotics (Basel) 2021; 10:363. [PMID: 33805493 PMCID: PMC8065651 DOI: 10.3390/antibiotics10040363] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 03/24/2021] [Accepted: 03/26/2021] [Indexed: 11/05/2022] Open
Abstract
Proteus mirabilis is a frequent cause of catheter associated urinary tract infections (CAUTIs). Several virulence factors contribute to its pathogenesis, but swarming motility, biofilm formation, and urease activity are considered the hallmarks. The increased prevalence in antibiotic resistance among uropathogens is alarming and requires searching for new treatment alternatives. With this in mind, our study aims to investigate antivirulence activity of indole derivatives against multidrug resistant P. mirabilis isolates. Ethyl acetate (EtOAc) extracts from Enterobacter sp. (rhizobacterium), isolated from Egyptian soil samples were tested for their ability to antagonize the virulence capacity and biofilm activity of P. mirabilis uropathogens. Extracts of two Enterobacter sp. isolates (coded Zch127 and Cbg70) showed the highest antivirulence activities against P. mirabilis. The two promising rhizobacteria Zch127 and Cbg70 were isolated from soil surrounding: Cucurbita pepo (Zucchini) and Brassica oleracea var. capitata L. (Cabbage), respectively. Sub-minimum inhibitory concentrations (Sub-MICs) of the two extracts showed potent antibiofilm activity with significant biofilm reduction of ten P. mirabilis clinical isolates (p-value < 0.05) in a dose-dependent manner. Interestingly, the Zch127 extract showed anti-urease, anti-swarming and anti-swimming activity against the tested strains. Indole derivatives identified represented key components of indole pyruvate, indole acetamide pathways; involved in the synthesis of indole acetic acid. Additional compounds for indole acetonitrile pathway were detected in the Zch127 extract which showed higher antivirulence activity. Accordingly, the findings of the current study model the feasibility of using these extracts as promising antivirulence agent against the P. mirabilis uropathogens and as potential therapy for treatment of urinary tract infections (UTIs).
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Affiliation(s)
- Mai A. Amer
- Department of Microbiology and Immunology, Faculty of Pharmacy, October University for Modern Sciences and Arts (MSA), Giza 12451, Egypt; (M.A.A.); (R.W.)
| | - Reham Wasfi
- Department of Microbiology and Immunology, Faculty of Pharmacy, October University for Modern Sciences and Arts (MSA), Giza 12451, Egypt; (M.A.A.); (R.W.)
| | - Ahmed S. Attia
- Department of Microbiology and Immunology, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt;
- Department of Microbiology and Immunology, School of Pharmacy, Newgiza University, Giza 11341, Egypt
| | - Mohamed A. Ramadan
- Department of Microbiology and Immunology, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt;
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15
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Synthesis, X-ray, Hirshfeld surface analysis, exploration of DNA binding, urease enzyme inhibition and anticancer activities of novel adamantane-naphthyl thiourea conjugate. Bioorg Chem 2021; 109:104707. [PMID: 33639362 DOI: 10.1016/j.bioorg.2021.104707] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 12/10/2020] [Accepted: 01/27/2021] [Indexed: 01/02/2023]
Abstract
1-(adamantane-1-carbonyl-3-(1-naphthyl)) thiourea (C22H24N2OS (4), was synthesized by the reaction of freshly prepared adamantane-1-carbonyl chloride from corresponding acid (3) with ammonium thiocyanate in 1:1 M ratio in dry acetone to afford the adamantane-1-carbonyl isothiocyanate (2) in situ followed by treatment with 1-naphthyl amine (3). The structure was established by elemental analyses, FTIR, 1H, 13C NMR and mass spectroscopy. The molecular and crystal structure were determined by single crystal X-ray analysis. It belongs to triclinic system P - 1 space group with a = 6.7832(5) Å, b = 11.1810(8) Å, c = 13.6660(10) Å, α = 105.941(6)°, β = 103.730(6)°, γ = 104.562(6)°, Z = 2, V = 910.82(11) Å3. The naphthyl group is almost planar. In the crystal structure, intermolecular CH···O hydrogen bonds link the molecules into centrosymmetric dimers, enclosing R22(14) ring motifs, while the intramolecular NH···O hydrogen bonds enclose S(6) ring motifs, in which they may be effective in the stabilization of the structure. The Hirshfeld surface analysis of the crystal structure indicates that the most important contributions for the crystal packing are from H … H (59.3%), H … C/C … H (19.8%) and H … S/S … H (10.1%) interactions. Hydrogen bonding and van der Waals interactions are the dominant interactions in the crystal packing. DFT, molecular docking and urease inhibition studies revealed stability and electron withdrawing nature of 4 as compared to DNA base pairs and residues of urease. The DNA binding results from docking, UV- visible spectroscopy, and viscosity studies indicated significant binding of 4 with the DNA via intercalation and groove binding. Further investigation of the compound was done on hepatocellular carcinoma; Huh-7 cell line as well as normal human embryonic kidney; Hek-293 cell line. The compound showed significant cytotoxic activity against Huh-7 cells in comparison to normal Hek-293 cells indicating selective cytotoxicity towards cancer cells.
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Lim YM, Kim H, Lim SK, Yoo J, Lee JY, Eom IC, Yoon BI, Kim P, Yu SD, Shim I. In Vitro and In Vivo Evaluation of the Toxic Effects of Dodecylguanidine Hydrochloride. TOXICS 2020; 8:E76. [PMID: 32971939 PMCID: PMC7560342 DOI: 10.3390/toxics8030076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 09/18/2020] [Accepted: 09/21/2020] [Indexed: 11/21/2022]
Abstract
The toxicity profiles of the widely used guanidine-based chemicals have not been fully elucidated. Herein, we evaluated the in vitro and in vivo toxicity of eight guanidine-based chemicals, focusing on inhalation toxicity. Among the eight chemicals, dodecylguanidine hydrochloride (DGH) was found to be the most cytotoxic (IC50: 0.39 μg/mL), as determined by the water soluble tetrazolium salts (WST) assay. An acute inhalation study for DGH was conducted using Sprague-Dawley rats at 8.6 ± 0.41, 21.3 ± 0.83, 68.0 ± 3.46 mg/m3 for low, middle, and high exposure groups, respectively. The levels of lactate dehydrogenase, polymorphonuclear leukocytes, and cytokines (MIP-2, TGF-β1, IL-1β, TNF-α, and IL-6) in the bronchoalveolar lavage fluid increased in a concentration-dependent manner. Histopathological examination revealed acute inflammation with necrosis in the nasal cavity and inflammation around terminal bronchioles and alveolar ducts in the lungs after DGH inhalation. The LC50 of DGH in rats after exposure for 4 h was estimated to be >68 mg/m3. Results from the inhalation studies showed that DGH was more toxic in male rats than in female rats. Overall, DGH was found to be the most cytotoxic chemical among guanidine-based chemicals. Exposure to aerosols of DGH could induce harmful pulmonary effects on human health.
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Affiliation(s)
- Yeon-Mi Lim
- Environmental Health Research Department, National Institute of Environmental Research, Incheon 22689, Korea; (Y.-M.L.); (H.K.); (S.K.L.); (J.Y.); (J.-Y.L.); (I.-C.E.); (P.K.); (S.-D.Y.)
| | - Haewon Kim
- Environmental Health Research Department, National Institute of Environmental Research, Incheon 22689, Korea; (Y.-M.L.); (H.K.); (S.K.L.); (J.Y.); (J.-Y.L.); (I.-C.E.); (P.K.); (S.-D.Y.)
| | - Seong Kwang Lim
- Environmental Health Research Department, National Institute of Environmental Research, Incheon 22689, Korea; (Y.-M.L.); (H.K.); (S.K.L.); (J.Y.); (J.-Y.L.); (I.-C.E.); (P.K.); (S.-D.Y.)
| | - Jean Yoo
- Environmental Health Research Department, National Institute of Environmental Research, Incheon 22689, Korea; (Y.-M.L.); (H.K.); (S.K.L.); (J.Y.); (J.-Y.L.); (I.-C.E.); (P.K.); (S.-D.Y.)
| | - Ji-Young Lee
- Environmental Health Research Department, National Institute of Environmental Research, Incheon 22689, Korea; (Y.-M.L.); (H.K.); (S.K.L.); (J.Y.); (J.-Y.L.); (I.-C.E.); (P.K.); (S.-D.Y.)
| | - Ig-Chun Eom
- Environmental Health Research Department, National Institute of Environmental Research, Incheon 22689, Korea; (Y.-M.L.); (H.K.); (S.K.L.); (J.Y.); (J.-Y.L.); (I.-C.E.); (P.K.); (S.-D.Y.)
| | - Byung-Il Yoon
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea;
| | - Pilje Kim
- Environmental Health Research Department, National Institute of Environmental Research, Incheon 22689, Korea; (Y.-M.L.); (H.K.); (S.K.L.); (J.Y.); (J.-Y.L.); (I.-C.E.); (P.K.); (S.-D.Y.)
| | - Seung-Do Yu
- Environmental Health Research Department, National Institute of Environmental Research, Incheon 22689, Korea; (Y.-M.L.); (H.K.); (S.K.L.); (J.Y.); (J.-Y.L.); (I.-C.E.); (P.K.); (S.-D.Y.)
| | - Ilseob Shim
- Environmental Health Research Department, National Institute of Environmental Research, Incheon 22689, Korea; (Y.-M.L.); (H.K.); (S.K.L.); (J.Y.); (J.-Y.L.); (I.-C.E.); (P.K.); (S.-D.Y.)
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Kim YM, Lee KH, Kim JH, Park SY, Song YG, Jeon SY, Park H. Is Only Clarithromycin Susceptibility Important for the Successful Eradication of Helicobacter pylori? Antibiotics (Basel) 2020; 9:E589. [PMID: 32916937 PMCID: PMC7558684 DOI: 10.3390/antibiotics9090589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/07/2020] [Accepted: 09/08/2020] [Indexed: 12/14/2022] Open
Abstract
Resistance to clarithromycin and other antibiotics included in the eradication regimen, such as amoxicillin and metronidazole, is important for Helicobacter pylori (H. pylori) eradication. The aim of this study was to investigate the correlation between the results of antimicrobial susceptibility testing and the eradication rate, as well as to understand the importance of antimicrobial susceptibility testing in H. pylori eradication. We retrospectively reviewed the electronic medical records of 1862 patients who underwent gastric biopsy for the culture of H. pylori during upper endoscopy from March 2015 to June 2019. We tried to find a correlation between the results of the antimicrobial susceptibility testing and the eradication rate in patients who received standard triple or concomitant therapy. A total of 247 patients exhibited positive results for culture and underwent antimicrobial susceptibility testing. Of these, 146 received eradication therapy, with follow-up tests after treatment. In the standard triple therapy, patients who were susceptible to both clarithromycin and amoxicillin exhibited significantly higher eradication rates (85.9%) than those susceptible to clarithromycin and resistant to amoxicillin (75.0%) or those resistant to clarithromycin and susceptible to amoxicillin (44.4%) (p = 0.013). In the concomitant therapy, patients who were susceptible to both clarithromycin and metronidazole had significantly higher eradication rates (96.3%) than those susceptible to clarithromycin and resistant to metronidazole (88.9%) or those resistant to clarithromycin and susceptible to metronidazole (50.0%) (p = 0.016). There was a correlation between the results of antimicrobial susceptibility testing and the eradication rate for H. pylori. In addition to clarithromycin, susceptibility to amoxicillin and metronidazole is also important for the successful eradication of H. pylori.
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Affiliation(s)
- Young Min Kim
- Divisions of Gastroenterology, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonjuro, Gangnam-gu, Seoul 06273, Korea; (Y.M.K.); (S.Y.J.); (H.P.)
| | - Kyoung Hwa Lee
- Divisions of Infectious Diseases, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonjuro, Gangnam-gu, Seoul 06273, Korea; (K.H.L.); (S.Y.P.)
| | - Jie-Hyun Kim
- Divisions of Gastroenterology, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonjuro, Gangnam-gu, Seoul 06273, Korea; (Y.M.K.); (S.Y.J.); (H.P.)
| | - Soon Young Park
- Divisions of Infectious Diseases, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonjuro, Gangnam-gu, Seoul 06273, Korea; (K.H.L.); (S.Y.P.)
| | - Young Goo Song
- Divisions of Infectious Diseases, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonjuro, Gangnam-gu, Seoul 06273, Korea; (K.H.L.); (S.Y.P.)
| | - Se Yeon Jeon
- Divisions of Gastroenterology, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonjuro, Gangnam-gu, Seoul 06273, Korea; (Y.M.K.); (S.Y.J.); (H.P.)
| | - Hyojin Park
- Divisions of Gastroenterology, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonjuro, Gangnam-gu, Seoul 06273, Korea; (Y.M.K.); (S.Y.J.); (H.P.)
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Mascellino MT, Oliva A, Miele MC, De Angelis M, Bruno G, Severi C. Secondary Antibiotic Resistance, Correlation between Genotypic and Phenotypic Methods and Treatment in Helicobacter pylori Infected Patients: A Retrospective Study. Antibiotics (Basel) 2020; 9:antibiotics9090549. [PMID: 32872117 PMCID: PMC7560230 DOI: 10.3390/antibiotics9090549] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 08/17/2020] [Accepted: 08/25/2020] [Indexed: 02/07/2023] Open
Abstract
The aim of this study was to evaluate the secondary resistance in Helicobacter pylori (Hp) infected patients who had failed a first-line therapy, and to compare the genotypic tests performed directly on gastric samples with phenotypic tests performed on culture media. The eradication rate of patients treated with bismuth quadruple therapy (BQT) is also evaluated. A total of 80 positive specimens were retrospectively examined. Antibiotic susceptibility testing of Hp strains was performed by E-test, whereas a molecular commercially available method was used for detecting the mutations involved in clarithromycin and levofloxacin resistance. High resistance levels to metronidazole and clarithromycin (61.6% and 35%, respectively) and worrying resistance levels to levofloxacin (15%) were found phenotypically. Multiple resistance to two or three antibiotics was observed as well. The polymorphism A2143G on clarithromycin 23S rRNA gene was found in 34/80 (42.5%) isolates including 10 mixed infections (29%), whereas 28/80 (35%) strains were resistant phenotypically. Levofloxacin resistance corresponded to 30% by PCR and 15% by E-test (statistically significant, p < 0.05). The knowledge of clarithromycin and levofloxacin resistance is crucial to establish an appropriate therapy in different geographical areas. The genetic methods were superior to phenotypic techniques in the absence of live bacteria or for identifying mixed infections that may lead to a resistance underestimation. The BQT eradication rate was effective (90%).
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Affiliation(s)
- Maria Teresa Mascellino
- Department of Public Health and Infectious Diseases, Sapienza University, 00185 Rome, Italy; (A.O.); (M.C.M.); (M.D.A.)
- Correspondence: ; Tel.: +39-06-49970880; Fax: +39-06-49972628
| | - Alessandra Oliva
- Department of Public Health and Infectious Diseases, Sapienza University, 00185 Rome, Italy; (A.O.); (M.C.M.); (M.D.A.)
| | - Maria Claudia Miele
- Department of Public Health and Infectious Diseases, Sapienza University, 00185 Rome, Italy; (A.O.); (M.C.M.); (M.D.A.)
| | - Massimiliano De Angelis
- Department of Public Health and Infectious Diseases, Sapienza University, 00185 Rome, Italy; (A.O.); (M.C.M.); (M.D.A.)
| | - Giovanni Bruno
- Department of Translational and Precision Medicine, Sapienza University, 00185 Rome, Italy; (G.B.); (C.S.)
| | - Carola Severi
- Department of Translational and Precision Medicine, Sapienza University, 00185 Rome, Italy; (G.B.); (C.S.)
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19
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Khan M, Khan N, Ghazal K, Shoaib S, Ali I, Rauf MK, Badshah A, Tahir MN, Rehman AU. Synthesis, characterization, crystal structure,in-vitrocytotoxicity, antibacterial, and antifungal activities of nickel(II) and cobalt(III) complexes with acylthioureas. J COORD CHEM 2020. [DOI: 10.1080/00958972.2020.1793136] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Mahira Khan
- Department of Chemistry, Sardar Bahadur Khan University, Quetta, Pakistan
| | - Naqeebullah Khan
- Department of Chemistry, University of Balochistan, Quetta, Pakistan
| | - Kinza Ghazal
- Department of Chemistry, Sardar Bahadur Khan University, Quetta, Pakistan
| | - Sara Shoaib
- Department of Chemistry, Sardar Bahadur Khan University, Quetta, Pakistan
| | - Irshad Ali
- Department of Chemistry, University of Balochistan, Quetta, Pakistan
| | | | - Amin Badshah
- Department of Chemistry, Quaid-I-Azam University, Islamabad, Pakistan
| | | | - Attiq-Ur Rehman
- Department of Chemistry, University of Balochistan, Quetta, Pakistan
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20
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Discovery of a Novel Mutation in DNA Gyrase and Changes in the Fluoroquinolone Resistance of Helicobacter pylori over a 14-Year Period: A Single Center Study in Korea. Antibiotics (Basel) 2020; 9:antibiotics9060287. [PMID: 32471292 PMCID: PMC7345123 DOI: 10.3390/antibiotics9060287] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 05/11/2020] [Accepted: 05/25/2020] [Indexed: 02/07/2023] Open
Abstract
The efficacy of fluoroquinolone-based eradication therapy largely depends on the fluoroquinolone resistance of H. pylori. The aim of this study was to investigate the changes in the primary resistance rate of H. pylori to fluoroquinolone and the mechanism of resistance in Korea. A total of 153 strains and 48 strains of H. pylori were isolated at a tertiary hospital in 2005/2006 and 2017/2018, respectively. The minimum inhibitory concentrations (MICs) of fluoroquinolone were determined by the serial 2-fold agar dilution method. DNA sequences in the quinolone resistance-determining regions of gyrA/gyrB were analyzed in resistant strains. Subsequent natural transformation study was performed to determine the association between gyrase mutation and resistance. The resistance rates increased from 19.0% (29/153) to 43.8% (21/48) both for levofloxacin and moxifloxacin. The MIC values for resistant strains increased from 2–8 µg/mL to 4–16 µg/mL over time. Mutation of gyrA was detected in 93.1% (27/29) and 100% (21/21) among the resistant strains in both periods, respectively. A novel Gly-85 mutation of gyrA was found and confirmed to be associated with fluoroquinolone resistance. Fluoroquinolone resistance rate of H. pylori has markedly increased over time in Korea. The resistance is mostly due to the point mutation of gyrA. Fluoroquinolone-containing regimens should be carefully selected in Korea, considering the increasing fluoroquinolone resistance.
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Özbek-Çelik B, Damar-Çelik D, Nørskov-Lauritsen N. Post-antibiotic Effect of Various Antibiotics against <i>Achromobacter xylosoxidans</i> Strains Isolated from Patients with Cystic Fibrosis. JOURNAL OF CLINICAL AND EXPERIMENTAL INVESTIGATIONS 2020. [DOI: 10.5799/jcei/8294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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22
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Lapasam A, Kollipara MR. A survey of crystal structures and biological activities of platinum group metal complexes containing N-acylthiourea ligands. PHOSPHORUS SULFUR 2020. [DOI: 10.1080/10426507.2020.1764956] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Agreeda Lapasam
- Centre for Advanced Studies in Chemistry, North Eastern Hill University, Shillong, India
| | - Mohan Rao Kollipara
- Centre for Advanced Studies in Chemistry, North Eastern Hill University, Shillong, India
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23
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Ramsamy Y, Mlisana KP, Allam M, Amoako DG, Abia ALK, Ismail A, Singh R, Kisten T, Swe Han KS, Muckart DJJ, Hardcastle T, Suleman M, Essack SY. Genomic Analysis of Carbapenemase -Producing Extensively Drug-Resistant Klebsiella pneumoniae Isolates Reveals the Horizontal Spread of p18-43_01 Plasmid Encoding blaNDM-1 in South Africa. Microorganisms 2020; 8:microorganisms8010137. [PMID: 31963608 PMCID: PMC7023316 DOI: 10.3390/microorganisms8010137] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 01/11/2020] [Accepted: 01/17/2020] [Indexed: 12/12/2022] Open
Abstract
Whole-genome sequence (WGS) analyses were employed to investigate the genomic epidemiology of extensively drug-resistant Klebsiella pneumoniae strains, focusing on the carbapenem resistance-encoding determinants, mobile genetic support, clonal and epidemiological relationships. A total of ten isolates were obtained from patients admitted to the intensive care unit (ICU) in a public hospital in South Africa. Five isolates were from rectal swabs of colonized patients and five from blood cultures of patients with invasive carbapenem-resistant infections. Following microbial identification and antibiotic susceptibility tests, the isolates were subjected to WGS on the Illumina MiSeq platform. All the isolates showed genotypic resistance to tested β-lactams (NDM-1, OXA-1, CTX-M-15, TEM-1B, SHV-1) and other antibiotics. All but one isolate belonged to the ST152 with a novel sequence type, ST3136, differing by a single-locus variant. The isolates had the same plasmid multilocus sequence type (IncF[K12:A-:B36]) and capsular serotype (KL149), supporting the epidemiological linkage between the clones. Resistance to carbapenems in the 10 isolates was conferred by the blaNDM-1 mediated by the acquisition of multi-replicon [ColRNAI, IncFIB(pB171), Col440I, IncFII, IncFIB(K) and IncFII(Yp)] p18-43_01 plasmid. These findings suggest that the acquisition of blaNDM-1-bearing plasmid structure (p18-43_01), horizontal transfer and clonal dissemination facilitate the spread of carbapenemases in South Africa. This emphasizes the importance of targeted infection control measures to prevent dissemination.
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Affiliation(s)
- Yogandree Ramsamy
- Antimicrobial Research Unit, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa; (A.L.K.A.); (S.Y.E.)
- Medical Microbiology, National Health Laboratory Services, Durban 4000, South Africa; (K.P.M.); (R.S.)
- Medical Microbiology, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa
- Correspondence: (Y.R.); (D.G.A.)
| | - Koleka P. Mlisana
- Medical Microbiology, National Health Laboratory Services, Durban 4000, South Africa; (K.P.M.); (R.S.)
- Medical Microbiology, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa
| | - Mushal Allam
- Sequencing Core Facility, National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg 2131, South Africa; (M.A.); (A.I.)
| | - Daniel G. Amoako
- Antimicrobial Research Unit, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa; (A.L.K.A.); (S.Y.E.)
- Correspondence: (Y.R.); (D.G.A.)
| | - Akebe L. K. Abia
- Antimicrobial Research Unit, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa; (A.L.K.A.); (S.Y.E.)
| | - Arshad Ismail
- Sequencing Core Facility, National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg 2131, South Africa; (M.A.); (A.I.)
| | - Ravesh Singh
- Medical Microbiology, National Health Laboratory Services, Durban 4000, South Africa; (K.P.M.); (R.S.)
- Medical Microbiology, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa
| | - Theroshnie Kisten
- School of Clinical Medicine, Discipline of Anaesthetics & Critical Care, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa;
- Inkosi Albert Luthuli Central Hospital, Department of Critical Care, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa
| | - Khine Swe Swe Han
- Medical Microbiology, National Health Laboratory Services, Durban 4000, South Africa; (K.P.M.); (R.S.)
- Medical Microbiology, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa
| | - David J. Jackson Muckart
- Inkosi Albert Luthuli Central Hospital, Department of Surgery & Trauma Unit, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa; (D.J.J.M.); (T.H.)
| | - Timothy Hardcastle
- Inkosi Albert Luthuli Central Hospital, Department of Surgery & Trauma Unit, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa; (D.J.J.M.); (T.H.)
| | - Moosa Suleman
- Ahmed Al-Kadi Private Hospital, Durban 4000, South Africa;
| | - Sabiha Y. Essack
- Antimicrobial Research Unit, College of Health Sciences, University of KwaZulu-Natal, Durban 4000, South Africa; (A.L.K.A.); (S.Y.E.)
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Nursing Students' Knowledge and Awareness of Antibiotic Use, Resistance and Stewardship: A Descriptive Cross-Sectional Study. Antibiotics (Basel) 2019; 8:antibiotics8040203. [PMID: 31671525 PMCID: PMC6963445 DOI: 10.3390/antibiotics8040203] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 10/27/2019] [Accepted: 10/28/2019] [Indexed: 12/03/2022] Open
Abstract
Antibiotic resistance is an emerging worldwide concern with serious repercussions in terms of morbi-mortality. Bearing in mind that the inadequate use of antibiotics, by healthcare staff as well as by the general population, is one of its main causes, a multidisciplinary approach is required to try to combat it. The aim of the present study was to determine nursing students’ knowledge and awareness of antibiotic use, resistance and stewardship. A cross-sectional design was used. A total of 578 nursing students from the University of Santiago de Compostela (Spain), ≥18 years old of both sexes were invited to complete the Spanish version of the questionnaire “Knowledge and awareness of the use, resistance and administration of antibiotics” between February and April 2019. Students had a low level of knowledge about antibiotics, 4.1 (CI95% = 3.4–4.8), especially in relation to antibiotic resistance. As the students were aware of this deficiency, the majority affirmed (>90%) that the current curriculum of nursing degree should have more training on antibiotics and infection control. Nursing staff play an important role in the rational use of antibiotics and as teachers of patients, so their training could be key in fighting antibiotic resistance.
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Hoang Quoc C, Nguyen Thi Phuong T, Nguyen Duc H, Tran Le T, Tran Thi Thu H, Nguyen Tuan S, Phan Trong L. Carbapenemase Genes and Multidrug Resistance of Acinetobacter Baumannii: A Cross Sectional Study of Patients with Pneumonia in Southern Vietnam. Antibiotics (Basel) 2019; 8:antibiotics8030148. [PMID: 31547482 PMCID: PMC6783976 DOI: 10.3390/antibiotics8030148] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 08/28/2019] [Accepted: 09/09/2019] [Indexed: 01/15/2023] Open
Abstract
Background: Acinetobacter baumannii (Ab) is an opportunistic bacterial pathogen found in hospital-acquired infections including nosocomial pneumonia, especially multidrug-resistant Ab. This study aims to survey the drug resistance profiles of Ab isolated from patients in Thong Nhat Dong Nai General Hospital and assess the relationship between genotypes and antibiotic resistance; Methods: Ninety-seven Ab strains isolated from 340 lower respiratory tract specimens among pneumonia patients were used to screen the most common local carbapenemase genes. Antimicrobial susceptibility testing results and demographic data were collected and minimum inhibitory concentrations (MIC) of colistin were also determined; Results: Over 80% and 90% of Ab strains were determined as carbapenem-resistant and multidrug-resistant (MDR), respectively. Most of the strains carried carbapenemase genes, including blaOXA-51, blaOXA-23-like, blaOXA-58-like, and blaNDM-1, with proportions of 97 (100%), 76 (78.4%), 10 (10.3%), 6 (6.2%), respectively. Amongst these genes, blaOXA-23-like was the only gene which significantly influenced the resistance (p < 0.0001); and Conclusions: The severity of Ab antibiotic resistance is urgent and specifically related to carbapenemase encoding genes. Therefore, screening of MDR Ab and carbapenemase for better treatment options is necessary.
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Affiliation(s)
| | - Thao Nguyen Thi Phuong
- Department of health and applied science, Dong Nai Technology University, Dong Nai Province 710000, Vietnam
| | - Hai Nguyen Duc
- Department of planning division, The Pasteur Institute, Ho Chi Minh City 700000, Vietnam
| | - Trung Tran Le
- College of Dentistry, Yonsei University, 50-1 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea
| | - Hang Tran Thi Thu
- Training center, The Pasteur Institute, Ho Chi Minh City 700000, Vietnam
| | - Si Nguyen Tuan
- Department of microbiology, Thong Nhat Dong Nai General Hospital, Bien Hoa City, Dong Nai Province 710000, Vietnam
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Hamdani SS, Khan BA, Saeed A, Larik FA, Hameed S, Channar PA, Ahmad K, Mughal EU, Abbas Q, Amin NU, Ghumro SA, Maitlo H, Hassan M, Raza H, Seo S. Densely substituted piperidines as a new class of elastase inhibitors: Synthesis and molecular modeling studies. Arch Pharm (Weinheim) 2019; 352:e1900061. [DOI: 10.1002/ardp.201900061] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/29/2019] [Accepted: 05/01/2019] [Indexed: 01/13/2023]
Affiliation(s)
| | - Bilal A. Khan
- Department of ChemistryUniversity of AJ&K Muzaffarabad Pakistan
| | - Aamer Saeed
- Department of ChemistryQuaid‐I‐Azam University Islamabad Pakistan
| | - Fayaz A. Larik
- Department of ChemistryQuaid‐I‐Azam University Islamabad Pakistan
| | - Shahid Hameed
- Department of ChemistryQuaid‐I‐Azam University Islamabad Pakistan
| | | | - Khalil Ahmad
- Department of ChemistryMirpur University of Science and Technology Mirpur Azad Kashmir Pakistan
| | | | - Qamar Abbas
- Department of PhysiologyUniversity of Sindh Jamshoro Pakistan
| | - Noor Ul Amin
- Department of ChemistryQuaid‐I‐Azam University Islamabad Pakistan
| | - Sarfaraz A. Ghumro
- International Center for Chemical and Biological Sciences, H.E.J. Research Institute of ChemistryUniversity of Karachi Karachi Pakistan
| | - Habibullah Maitlo
- Department of Biological Sciences, College of Natural SciencesKongju National University Gongju Chungnam Republic of Korea
| | - Mubashir Hassan
- Department of Biological Sciences, College of Natural SciencesKongju National University Gongju Chungnam Republic of Korea
| | - Hussain Raza
- Department of Biological Sciences, College of Natural SciencesKongju National University Gongju Chungnam Republic of Korea
| | - Sung‐Yum Seo
- Department of Biological Sciences, College of Natural SciencesKongju National University Gongju Chungnam Republic of Korea
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Abd El-Baky RM, Sandle T, John J, Abuo-Rahma GEDA, Hetta HF. A novel mechanism of action of ketoconazole: inhibition of the NorA efflux pump system and biofilm formation in multidrug-resistant Staphylococcus aureus. Infect Drug Resist 2019; 12:1703-1718. [PMID: 31354319 PMCID: PMC6585162 DOI: 10.2147/idr.s201124] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 03/11/2019] [Indexed: 11/23/2022] Open
Abstract
Background: The rapid emergence of antimicrobial resistance among Gram-positive organisms, especially staphylococci, has become a serious clinical challenge. Efflux machinery and biofilm formation are considered two of the main causes of antimicrobial resistance and therapy failure. Aim: Our study aims to evaluate the antibiofilm and efflux pump inhibitory activity of the antifungal ketoconazole against multidrug-resistant (MDR) Staphylococcus aureus. Methods: Ketoconazole was tested for its effect on the following: minimum inhibitory concentrations (MICs) of ciprofloxacin, norfloxacin, levofloxacin, and ethidium bromide (EtBr) by the broth microdilution method, the efflux of EtBr by NorA-positive MDR S. aureus, and the relative expression of NorA, NorB, and NorC efflux pump genes. Docking studies of ketoconazole were performed using 1PW4 (glycerol-3-phosphate transporter from Escherichia coli which was the representative structure from the major facilitator superfamily). Results: Ketoconazole significantly decreased the MICs of levofloxacin, ciprofloxacin, norfloxacin, and EtBr (a substrate for efflux pump) by 8 to 1024-fold (P<0.01) and decreased the efflux of EtBr. Furthermore, a time-kill assay revealed that combinations of levofloxacin with ketoconazole or carbonyl cyanide m-chlorophenylhydrazone showed no growth for the tested strains after 24 h in comparison to the effect of levofloxacin alone. Docking studies and the ability of ketoconazole to diminish the relative expression of NorA gene in comparison to control (untreated strains) confirmed its action as an efflux pump inhibitor. Conclusion: The findings showed that the antifungal ketoconazole has no antibacterial activity but can potentiate the activity of the fluroquinolones against MDR S. aureus via inhibiting efflux pump and biofilm formation in vitro.
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Affiliation(s)
- Rehab M Abd El-Baky
- Department of Microbiology and Immunology, Faculty of Pharmacy, Minia University, Minia 61519, Egypt.,Microbiology and Immunology Department, Faculty of Pharmacy, Deraya University, Minia 11566, Egypt
| | - Tim Sandle
- School of Health Sciences, Division of Pharmacy & Optometry, University of Manchester, Manchester, UK
| | - James John
- Sri Ramachandra Medical College and Research Institute, Sri Ramachandra University, Chennai, India
| | | | - Helal F Hetta
- Department of Medical Microbiology & Immunology, Faculty of Medicine, Assiut University, Assiut, Egypt.,Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, USA
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28
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Shahzad D, Saeed A, Larik FA, Channar PA, Abbas Q, Alajmi MF, Arshad MI, Erben MF, Hassan M, Raza H, Seo SY, El-Seedi HR. Novel C-2 Symmetric Molecules as α-Glucosidase and α-Amylase Inhibitors: Design, Synthesis, Kinetic Evaluation, Molecular Docking and Pharmacokinetics. Molecules 2019; 24:molecules24081511. [PMID: 30999646 PMCID: PMC6515238 DOI: 10.3390/molecules24081511] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 03/27/2019] [Accepted: 04/02/2019] [Indexed: 01/29/2023] Open
Abstract
A series of symmetrical salicylaldehyde-bishydrazine azo molecules, 5a–5h, have been synthesized, characterized by 1H-NMR and 13C-NMR, and evaluated for their in vitro α-glucosidase and α-amylase inhibitory activities. All the synthesized compounds efficiently inhibited both enzymes. Compound 5g was the most potent derivative in the series, and powerfully inhibited both α-glucosidase and α-amylase. The IC50 of 5g against α-glucosidase was 0.35917 ± 0.0189 µM (standard acarbose IC50 = 6.109 ± 0.329 µM), and the IC50 value of 5g against α-amylase was 0.4379 ± 0.0423 µM (standard acarbose IC50 = 33.178 ± 2.392 µM). The Lineweaver-Burk plot indicated that compound 5g is a competitive inhibitor of α-glucosidase. The binding interactions of the most active analogues were confirmed through molecular docking studies. Docking studies showed that 5g interacts with the residues Trp690, Asp548, Arg425, and Glu426, which form hydrogen bonds to 5g with distances of 2.05, 2.20, 2.10 and 2.18 Å, respectively. All compounds showed high mutagenic and tumorigenic behaviors, and only 5e showed irritant properties. In addition, all the derivatives showed good antioxidant activities. The pharmacokinetic evaluation also revealed promising results
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Affiliation(s)
- Danish Shahzad
- Department of Chemistry, Quaid-I-Azam University, Islamabad 45320, Pakistan.
| | - Aamer Saeed
- Department of Chemistry, Quaid-I-Azam University, Islamabad 45320, Pakistan.
| | - Fayaz Ali Larik
- Department of Chemistry, Quaid-I-Azam University, Islamabad 45320, Pakistan.
| | - Pervaiz Ali Channar
- Department of Chemistry, Quaid-I-Azam University, Islamabad 45320, Pakistan.
| | - Qamar Abbas
- Department of Physiology, University of Sindh, Jamshoro 76080, Pakistan.
| | - Mohamed F Alajmi
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia.
| | - M Ifzan Arshad
- Department of Chemistry, Quaid-I-Azam University, Islamabad 45320, Pakistan.
| | - Mauricio F Erben
- CEQUINOR (UNLP, CONICET-CCT La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Boulevard 120 e/60 y 64 N°1465, La Plata 1900, Argentina.
| | - Mubashir Hassan
- Department of Biological Sciences, College of Natural Sciences, Kongju National University, 56 Gongjudehak-Ro, Gongju, Chungnam 32588, Korea.
| | - Hussain Raza
- Department of Biological Sciences, College of Natural Sciences, Kongju National University, 56 Gongjudehak-Ro, Gongju, Chungnam 32588, Korea.
| | - Sung-Yum Seo
- Department of Biological Sciences, College of Natural Sciences, Kongju National University, 56 Gongjudehak-Ro, Gongju, Chungnam 32588, Korea.
| | - Hesham R El-Seedi
- Pharmacognosy Group, Department of Medicinal Chemistry, Biomedical Center (BMC), Uppsala University, SE-751 23 Uppsala, Sweden.
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Synthesis, characterization, X-ray diffraction study, in-vitro cytotoxicity, antibacterial and antifungal activities of nickel(II) and copper(II) complexes with acyl thiourea ligand. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.09.028] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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30
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Bhavanam LR, Kotra V, Mule SR, Krishna Khandapu BM, Bollikolla HB. Synthesis, Characterization, Anticancer and Antimicrobial Activity Studies of Novel Isomeric 2,4-Disubstituted Ureide Derivatives of Pyrimidinopiperidines. ChemistrySelect 2019. [DOI: 10.1002/slct.201803294] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Lourdu Rani Bhavanam
- Department of Chemistry; Acharya Nagarjuna University, Guntur, Andhra; Pradesh India
| | - Vijay Kotra
- Centre for Pharmaceutical Research and Postgraduate Studies, Faculty of Pharmacy; Quest International University Perak; 30250 Ipoh Malaysia
| | - Sivanagi Reddy Mule
- Department of Chemistry; Acharya Nagarjuna University, Guntur, Andhra; Pradesh India
| | | | - Hari Babu Bollikolla
- Department of Chemistry; Acharya Nagarjuna University, Guntur, Andhra; Pradesh India
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