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Wanjari PJ, Rath A, Sathe RY, Bharatam PV. Identification of CYP3A4 inhibitors as potential anti-cancer agents using pharmacoinformatics approach. J Mol Model 2023; 29:156. [PMID: 37097473 DOI: 10.1007/s00894-023-05538-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 03/30/2023] [Indexed: 04/26/2023]
Abstract
Biguanide derivatives exhibit a wide variety of therapeutic applications, including anti-cancer effects. Metformin is an effective anti-cancer agent against breast cancer, lung cancer, and prostate cancer. In the crystal structure (PDB ID: 5G5J), it was found that metformin is found in the active site of CYP3A4, and the associated anti-cancer effect was explored. Taking clues from this work, pharmacoinformatics research has been carried out on a series of known and virtual biguanide, guanylthiourea (GTU), and nitreone derivatives. This exercise led to the identification of more than 100 species that exhibit greater binding affinity toward CYP3A4 in comparison to that of metformin. Selected six molecules were subjected to molecular dynamics simulations, and the results are presented in this work.
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Affiliation(s)
- Pravin J Wanjari
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar-160062, Punjab, India
| | - Asutosh Rath
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar-160062, Punjab, India
| | - Rohit Y Sathe
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar-160062, Punjab, India
| | - Prasad V Bharatam
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar-160062, Punjab, India.
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Bankar AA, Kathuria D. Guanylguanidines: Catalyst and Ligand for Organic Transformations. ChemistrySelect 2022. [DOI: 10.1002/slct.202201273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Affiliation(s)
- Apoorva A. Bankar
- Department of Pharmaceutical Chemistry Government College of Pharmacy, Kathora Naka Amravati Maharashtra 444604 India
| | - Deepika Kathuria
- University Center for Research and Development Chandigarh University Gharuan Punjab 140413 India
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Grytsai O, Ronco C, Benhida R. Synthetic accesses to biguanide compounds. Beilstein J Org Chem 2021; 17:1001-1040. [PMID: 34025808 PMCID: PMC8111433 DOI: 10.3762/bjoc.17.82] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Accepted: 04/21/2021] [Indexed: 12/27/2022] Open
Abstract
Biguanide is a unique chemical function, which has attracted much attention a century ago and is showing resurgent interest in recent years after a long period of dormancy. This class of compounds has found broad applications such as reaction catalysts, organic strong bases, ligands for metal complexation, or versatile starting materials in organic synthesis for the preparation of nitrogen-containing heterocycles. Moreover, biguanides demonstrate a wide range of biological activities and some representatives are worldwide known such as metformin, the first-line treatment against type II diabetes, or chlorhexidine, the gold standard disinfectant and antiseptic. Although scarcely represented, the number of "success stories" with biguanide-containing compounds highlights their value and their unexploited potential as future drugs in various therapeutic fields or as efficient metal ligands. This review provides an extensive and critical overview of the synthetic accesses to biguanide compounds, as well as their comparative advantages and limitations. It also underlines the need of developing new synthetic methodologies to reach a wider variety of biguanides and to overcome the underrepresentation of these compounds.
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Affiliation(s)
- Oleksandr Grytsai
- Institut de Chimie de Nice UMR7272, Parc Valrose, Université Côte d’Azur, Nice, France
| | - Cyril Ronco
- Institut de Chimie de Nice UMR7272, Parc Valrose, Université Côte d’Azur, Nice, France
| | - Rachid Benhida
- Institut de Chimie de Nice UMR7272, Parc Valrose, Université Côte d’Azur, Nice, France
- Department of Chemical and Biochemical Sciences, Mohammed VI Polytechnic University (UM6P), Ben Guerir, Morocco
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Kathuria D, Raul AD, Wanjari P, Bharatam PV. Biguanides: Species with versatile therapeutic applications. Eur J Med Chem 2021; 219:113378. [PMID: 33857729 DOI: 10.1016/j.ejmech.2021.113378] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Revised: 03/04/2021] [Accepted: 03/08/2021] [Indexed: 12/18/2022]
Abstract
Biguanides are compounds in which two guanidine moieties are fused to form a highly conjugated system. Biguanides are highly basic and hence they are available as salts mostly hydrochloride salts, these cationic species have been found to exhibit many therapeutic properties. This review covers the research and development carried out on biguanides and accounts the various therapeutic applications of drugs containing biguanide group-such as antimalarial, antidiabetic, antiviral, anticancer, antibacterial, antifungal, anti-tubercular, antifilarial, anti-HIV, as well as other biological activities. The aim of this review is to compile all the medicinal chemistry applications of this class of compounds so as to pave way for the accelerated efforts in finding the drug action mechanisms associated with this class of compounds. Importance has been given to the organic chemistry of these biguanide derivatives also.
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Affiliation(s)
- Deepika Kathuria
- University Center for Research and Development, Chandigarh University, Gharuan, Punjab, 140413, India
| | - Akshay D Raul
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S. A. S. Nagar, 160 062, Punjab, India
| | - Pravin Wanjari
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S. A. S. Nagar, 160 062, Punjab, India
| | - Prasad V Bharatam
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S. A. S. Nagar, 160 062, Punjab, India.
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Bhatia S, Lal A, Singh S, Franco F. Potential of polyphenols in curbing quorum sensing and biofilm formation in Gram-negative pathogens. Asian Pac J Trop Biomed 2021. [DOI: 10.4103/2221-1691.314044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2022] Open
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Sun B, Chen J, Ye F, Lu Y, Xu G, Mao L, Gao Y, Zhang H, Wang H, Peng L. Synthesis and In Vitro Antibacterial Activity of Novel Naphthyridinone Derivatives. ChemistrySelect 2019. [DOI: 10.1002/slct.201803532] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Bin Sun
- College of Chemistry, Chemical Engineering and Materials ScienceCollaborative Innovation Center of Functionalized Probes for Chemical ImagingKey Laboratory of Molecular and Nano ProbesMinistry of EducationShandong Normal University Jinan 250014, P. R. China
| | - Jianwei Chen
- The College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou, 310014, P. R. China
| | - Fei Ye
- College of Life SciencesZhejiang Sci-Tech University and Drug Discovery and Design CenterState Key Laboratory of Drug ResearchShanghai Institute of Materia MedicaChinese Academy
| | - Yaojia Lu
- The College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou, 310014, P. R. China
| | - Guiqing Xu
- College of Life SciencesZhejiang Sci-Tech University and Drug Discovery and Design CenterState Key Laboratory of Drug ResearchShanghai Institute of Materia MedicaChinese Academy
| | - Longfei Mao
- School of Chemistry and Chemical EngineeringHenan Engineering Research Center of Chiral Hydroxyl PharmaceuticalHenan normal university Xinxiang 453007 China
| | - Yuan Gao
- School of Chemistry and Chemical EngineeringHenan Engineering Research Center of Chiral Hydroxyl PharmaceuticalHenan normal university Xinxiang 453007 China
| | - Huawei Zhang
- The College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou, 310014, P. R. China
| | - Hong Wang
- The College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou, 310014, P. R. China
- Collaborative Innovation Center of Yangtze River Delta Region Green PharmaceuticalsZhejiang University of Technology Hangzhou, 310014, P. R. China
| | - Lizeng Peng
- Jinan Asia Pharma Tech Company LTD. Jinan 250000, P. R. China
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Haque S, Ahmad F, Dar SA, Jawed A, Mandal RK, Wahid M, Lohani M, Khan S, Singh V, Akhter N. Developments in strategies for Quorum Sensing virulence factor inhibition to combat bacterial drug resistance. Microb Pathog 2018; 121:293-302. [PMID: 29857121 DOI: 10.1016/j.micpath.2018.05.046] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Revised: 05/27/2018] [Accepted: 05/28/2018] [Indexed: 12/22/2022]
Abstract
Quorum sensing (QS) is a complex bacterial intercellular communication system. It is mediated by molecules called auto-inducers (AIs) and allows coordinated responses to a variety of environmental signals by inducing alterations in gene expression. Communication through QS can tremendously stimulate the pathogenicity and virulence via multiple mechanisms in pathogenic bacteria. The present review explores the major types of multitudinous QS systems known in Gram-positive and Gram-negative bacteria and their roles in bacterial pathogenesis and drug resistance. Because bacterial resistance to antibiotics is increasingly becoming a significant clinical challenge to human health; alternate strategies to combat drug resistance are warranted. Targeting bacterial pathogenicity by interruptions in QS using natural QS inhibitors and synthetic quorum-quenching analogs are being increasingly considered for development of next generation antimicrobials. The review highlights the recent advancements in discovery of promising new QS modulators and their efficiency in controlling infections caused by multidrug-resistant bacterial pathogens.
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Affiliation(s)
- Shafiul Haque
- Research and Scientific Studies Unit, College of Nursing & Allied Health Sciences, Jazan University, Jazan, 45142, Saudi Arabia.
| | - Faraz Ahmad
- Department of Public Health, College of Public Health, Imam Abdulrahman Bin Faisal University, Dammam, 31441, Saudi Arabia
| | - Sajad A Dar
- Research and Scientific Studies Unit, College of Nursing & Allied Health Sciences, Jazan University, Jazan, 45142, Saudi Arabia
| | - Arshad Jawed
- Research and Scientific Studies Unit, College of Nursing & Allied Health Sciences, Jazan University, Jazan, 45142, Saudi Arabia
| | - Raju K Mandal
- Research and Scientific Studies Unit, College of Nursing & Allied Health Sciences, Jazan University, Jazan, 45142, Saudi Arabia
| | - Mohd Wahid
- Research and Scientific Studies Unit, College of Nursing & Allied Health Sciences, Jazan University, Jazan, 45142, Saudi Arabia
| | - Mohtashim Lohani
- Department of Emergency Medical Services, College of Applied Medical Sciences, Jazan University, Jazan, 45142, Saudi Arabia
| | - Saif Khan
- Department of Clinical Laboratory Science, College of Applied Medical Sciences, University of Ha'il, Ha'il, 2440, Saudi Arabia
| | - Vineeta Singh
- Department of Biotechnology, Institute of Engineering & Technology, Lucknow, 226021, Uttar Pradesh, India
| | - Naseem Akhter
- Department of Laboratory Medicine, Faculty of Applied Medical Sciences, Albaha University, Albaha, 65431, Saudi Arabia
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Bodede O, Shaik S, Chenia H, Singh P, Moodley R. Quorum sensing inhibitory potential and in silico molecular docking of flavonoids and novel terpenoids from Senegalia nigrescens. JOURNAL OF ETHNOPHARMACOLOGY 2018; 216:134-146. [PMID: 29408657 DOI: 10.1016/j.jep.2018.01.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 01/19/2018] [Accepted: 01/26/2018] [Indexed: 06/07/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Senegalia nigrescens is used in traditional medicine for the treatment of dysentery and convulsions. AIMS OF THE STUDY This study was aimed at identifying bioactive compounds from S. nigrescens and carrying out in vitro and in silico anti-quorum sensing studies on the compounds. MATERIALS AND METHODS Extracts of S. nigrescens were chromatographed repeatedly. The isolated compounds were characterised using NMR spectroscopy and mass spectrometry. The anti-quorum sensing potential of S. nigrescens crude extracts and selected phytochemicals was quantified using Chromobacterium violaceum quorum sensing-controlled violacein inhibition assays. Qualitative modulation of quorum sensing activity and signal synthesis was investigated using agar diffusion double ring assays and C. violaceum. Molecular docking was conducted to explore the binding conformations of ent-kaurene diterpenes and flavonoids into the binding sites of quorum sensing regulator proteins, CviR and CviR'. RESULTS Phytochemical investigation of S. nigrescens resulted in the isolation of a new ent-kaurene diterpenoid (ent-kaur-15-en-18,20-diol) alongside ent-kaur-15-en-18-ol, being isolated for the first time from a plant species. Other compounds isolated included 30-hydroxylup-20(29)-en-3β-ol, 3β-hydroxy-20(29)-en-lupan-30-al, lupeol, stigmasterol, a long chain alcohol (tetracosan-1-ol) and three flavonoids (melanoxetin, quercetin and quercetin-3-O-methyl ether). Structures of isolated compounds were elucidated using different spectroscopic techniques including 1D and 2D NMR. Inhibition of violacein production was concentration-dependent, with 56.52% inhibition being obtained with 200 µg of quercetin-3-O-methyl ether, while 53.38% inhibition was obtained with 600 µg of quercetin. Agar diffusion double ring assays indicated CviI synthase/CviR receptor modulation by S. nigrescens phytochemicals, suggesting that quorum signal synthesis was down-regulated and/or targeting binding of signal to the receptor. The computed binding energy data suggested that the flavonoids had a stronger tendency to inhibit both CviR and CviR' with varying binding affinities. CONCLUSION S. nigrescens crude extracts together with the novel ent-kaurenoids and flavonoids demonstrated potential anti-quorum sensing activity. S. nigrescens may thus represent a source of anti-quorum sensing therapeutic candidates for the control of existing and emerging infectious diseases.
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Affiliation(s)
- Olusola Bodede
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Private Bag X54001, Durban 4000, South Africa
| | - Shakira Shaik
- School of Life Sciences, University of KwaZulu-Natal, Westville Campus, Private Bag X54001, Durban 4000, South Africa
| | - Hafizah Chenia
- School of Life Sciences, University of KwaZulu-Natal, Westville Campus, Private Bag X54001, Durban 4000, South Africa
| | - Parvesh Singh
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Private Bag X54001, Durban 4000, South Africa
| | - Roshila Moodley
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Private Bag X54001, Durban 4000, South Africa.
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Singh S, Bhatia S. In silico identification of albendazole as a quorum sensing inhibitor and its in vitro verification using CviR and LasB receptors based assay systems. ACTA ACUST UNITED AC 2018; 8:201-209. [PMID: 30211080 PMCID: PMC6128976 DOI: 10.15171/bi.2018.23] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 02/18/2018] [Accepted: 03/11/2018] [Indexed: 01/18/2023]
Abstract
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Introduction:Quorum sensing inhibition (QSI) is one of the vital tools to overcome emerging virulence of pathogenic bacteria which aims at curbing bacterial resistance. Targeting QS (quorum sensing) as chemotherapy is less likely to generate resistance among pathogens as it targets only the adaptation and not the survival mechanism of the pathogen. Several QS inhibitors were developed in the recent past but none of them managed to have clinical application due to known toxic effects for human consumption. A rapid development of QS inhibitor drugs could be achieved by verification of the QSI activity of drugs which are already in clinical use with known pharmacology. Recently, a known FDA approved clinical drug niclosamide belonging to an anthelmintic class is found to exhibit QSI activity.
Methods: We have focused our study on Albendazole, another FDA approved clinical drug belonging to the same class for its potential to act as QSI. The structure-based molecular docking is used for finding putative interactions made by this drug with the CviR and LasB receptor protein of Chromobacterium violaceum and Pseudomonas aeruginosa , respectively. Further, the in vitro activity of this drug has been evaluated by employing CviR and LasB receptor-based bioassay. The efficacy of this drug alone and in combination with antibiotic Tobramycin to inhibit P. aeruginosa based biofilms was also analyzed by developing the biofilms on chambered glass slides and performing anti-biofilm assay.
Results: Further, this drug found to inhibit purple pigment violacein production in C. violaceum , which is under the control of C6-AHL-CviR mediated QS in this human pathogen. The in vivo bioassays results suggested that albendazole has great potential to act as a QS inhibitor as found inhibiting violacein production in C. violaceum and biofilm formation in P. aeruginosa , respectively.
Conclusion: It is that structure-based molecular docking guided bioassay evaluation is an efficient tool for finding the new therapeutic use of old drugs which could have more chances to come easily in clinical application for their newly identified therapeutic uses.
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Affiliation(s)
- Shaminder Singh
- Biochemical Engineering Research and Process Development Centre (BERPDC), Institute of Microbial Technology (IMTECH), Chandigarh - 160036, India (Previous address).,Department of Industrial Microbiology, Jacob Institute of Biotechnology and Bioengineering, Sam Higginbottom University of Agriculture, Technology and Sciences (SHUATS), Allahabad, Uttar-Pradesh-211007, India (Present address)
| | - Sonam Bhatia
- Department of Pharmaceutical Sciences, Shalom Institute of Health and Allied Sciences (SIHAS), Sam Higginbottom University of Agriculture, Technology and Sciences (SHUATS), Allahabad, Uttar-Pradesh-211007, India
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Yadav DK, Kumar S, Saloni, Misra S, Yadav L, Teli M, Sharma P, Chaudhary S, Kumar N, Choi EH, Kim HS, Kim MH. Molecular Insights into the Interaction of RONS and Thieno[3,2-c]pyran Analogs with SIRT6/COX-2: A Molecular Dynamics Study. Sci Rep 2018; 8:4777. [PMID: 29556059 PMCID: PMC5859274 DOI: 10.1038/s41598-018-22972-9] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 03/05/2018] [Indexed: 01/21/2023] Open
Abstract
SIRT6 and COX-2 are oncogenes target that promote the expression of proinflammatory and pro-survival proteins through a signaling pathway, which leads to increased survival and proliferation of tumor cells. However, COX-2 also suppresses skin tumorigenesis and their relationship with SIRT6, making it an interesting target for the discovery of drugs with anti-inflammatory and anti-cancer properties. Herein, we studied the interaction of thieno[3,2-c]pyran analogs and RONS species with SIRT6 and COX-2 through the use of molecular docking and molecular dynamic simulations. Molecular docking studies revealed the importance of hydrophobic and hydrophilic amino acid residues for the stability. The molecular dynamics study examined conformational changes in the enzymes caused by the binding of the substrates and how those changes affected the stability of the protein-drug complex. The average RMSD values of the backbone atoms in compounds 6 and 10 were calculated from 1000 ps to 10000 ps and were found to be 0.13 nm for both compounds. Similarly, the radius of gyration values for compounds 6 and 10 were found to be 1.87 ± 0.03 nm and 1.86 ± 0.02 nm, respectively. The work presented here, will be of great help in lead identification and optimization for early drug discovery.
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Affiliation(s)
- Dharmendra K Yadav
- College of Pharmacy, Gachon University of Medicine and Science, 191, Hambangmoe-ro, Yeonsu-gu, Incheon, 21936, Republic of Korea.
| | - Surendra Kumar
- College of Pharmacy, Gachon University of Medicine and Science, 191, Hambangmoe-ro, Yeonsu-gu, Incheon, 21936, Republic of Korea
| | - Saloni
- College of Pharmacy, Gachon University of Medicine and Science, 191, Hambangmoe-ro, Yeonsu-gu, Incheon, 21936, Republic of Korea
| | - Sanjeev Misra
- Department of Biochemistry, All India Institute of Medical Science, Jodhpur, Rajasthan, 342005, India
| | - Lalit Yadav
- Department of Chemistry, Malaviya National Institute of Technology, Jawaharlal Nehru Marg, Jaipur, 302017, India
| | - Mahesh Teli
- Faculty of Biochemistry and Molecular Medicine Aapistie, University of Oulu, 7A, Oulu, 90220, Finland
| | - Praveen Sharma
- Department of Biochemistry, All India Institute of Medical Science, Jodhpur, Rajasthan, 342005, India
| | - Sandeep Chaudhary
- Department of Chemistry, Malaviya National Institute of Technology, Jawaharlal Nehru Marg, Jaipur, 302017, India
| | - Naresh Kumar
- Plasma Bioscience Research Center/Department of Electrical and Biological Physics, Kwangwoon University, 20 Kwangwon-Ro, Nowon-Gu, Seoul, 139-701, Republic of Korea.,Department of Chemistry, Research group PLASMANT, University of Antwerp, BE-2610, Wilrijk-Antwerp, Belgium
| | - Eun Ha Choi
- Plasma Bioscience Research Center/Department of Electrical and Biological Physics, Kwangwoon University, 20 Kwangwon-Ro, Nowon-Gu, Seoul, 139-701, Republic of Korea
| | - Hyung Sik Kim
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Mi-Hyun Kim
- College of Pharmacy, Gachon University of Medicine and Science, 191, Hambangmoe-ro, Yeonsu-gu, Incheon, 21936, Republic of Korea.
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Nizalapur S, Kimyon O, Yee E, Bhadbhade MM, Manefield M, Willcox M, Black DS, Kumar N. Synthesis and biological evaluation of novel acyclic and cyclic glyoxamide based derivatives as bacterial quorum sensing and biofilm inhibitors. Org Biomol Chem 2017; 15:5743-5755. [PMID: 28654117 DOI: 10.1039/c7ob01011g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bacteria regulate the expression of various virulence factors and processes such as biofilm formation through a chemically-mediated communication mechanism called quorum sensing. Bacterial biofilms contribute to antimicrobial resistance as they can protect bacteria embedded in their matrix from the effects of antibiotics. Thus, developing novel quorum sensing inhibitors, which can inhibit biofilm formation, is a viable strategy to combat antimicrobial resistance. We report herein the synthesis of novel acyclic and cyclic glyoxamide derivatives via ring-opening reactions of N-acylisatins. These compounds were evaluated for their quorum sensing inhibition activity against P. aeruginosa MH602 and E. coli MT102. Compounds 20, 21 and 30 displayed the greatest quorum sensing inhibition activity against P. aeruginosa MH602, with 71.5%, 71.5%, and 74% inhibition, respectively, at 250 μM. Compounds 18, 20 and 21 exhibited the greatest QSI activity against E. coli MT102, with 71.5%, 72.1% and 73.5% quorum sensing inhibition activity, respectively. In addition, the biofilm inhibition activity was also investigated against P. aeruginosa and E. coli at 250 μM. The glyoxamide compounds 16, 18 and 19 exhibited 71.2%, 66.9%, and 66.5% inhibition of P. aeruginosa biofilms, respectively; whereas compounds 12, 20, and 22 showed the greatest inhibitory activity against E. coli biofilms with 87.9%, 90.8% and 89.5%, respectively. Finally, the determination of the in vitro toxicity against human MRC-5 lung fibroblast cells revealed that these novel glyoxamide compounds are non-toxic to human cells.
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Affiliation(s)
| | - Onder Kimyon
- School of Civil and Environmental Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | - Eugene Yee
- School of Chemistry, UNSW Sydney, NSW 2052, Australia.
| | - Mohan M Bhadbhade
- Solid State & Elemental Analysis Unit, Mark Wainwright Analytical Centre, Division of Research, UNSW Australia, NSW 2052, Australia
| | - Mike Manefield
- School of Civil and Environmental Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | - Mark Willcox
- School of Optometry and Vision Science, UNSW Australia, Sydney, NSW 2052, Australia
| | | | - Naresh Kumar
- School of Chemistry, UNSW Sydney, NSW 2052, Australia.
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Aliyu AB, Koorbanally NA, Moodley B, Singh P, Chenia HY. Quorum sensing inhibitory potential and molecular docking studies of sesquiterpene lactones from Vernonia blumeoides. PHYTOCHEMISTRY 2016; 126:23-33. [PMID: 26920717 DOI: 10.1016/j.phytochem.2016.02.012] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 02/17/2016] [Accepted: 02/19/2016] [Indexed: 06/05/2023]
Abstract
The increasing incidence of multidrug-resistant Gram-negative bacterial pathogens has focused research on the suppression of bacterial virulence via quorum sensing inhibition strategies, rather than the conventional antimicrobial approach. The anti-virulence potential of eudesmanolide sesquiterpene lactones previously isolated from Vernonia blumeoides was assessed by inhibition of quorum sensing and in silico molecular docking. Inhibition of quorum sensing-controlled violacein production in Chromobacterium violaceum was quantified using violacein inhibition assays. Qualitative modulation of quorum sensing activity and signal synthesis was investigated using agar diffusion double ring assays and C. violaceum and Agrobacterium tumefaciens biosensor systems. Inhibition of violacein production was concentration-dependent, with ⩾90% inhibition being obtained with ⩾2.4 mg ml(-1) of crude extracts. Violacein inhibition was significant for the ethyl acetate extract with decreasing inhibition being observed with dichloromethane, hexane and methanol extracts. Violacein inhibition ⩾80% was obtained with 0.071 mg ml(-1) of blumeoidolide B in comparison with ⩾3.6 mg ml(-1) of blumeoidolide A. Agar diffusion double ring assays indicated that only the activity of the LuxI synthase homologue, CviI, was modulated by blumeoidolides A and B, and V. blumeoides crude extracts, suggesting that quorum sensing signal synthesis was down-regulated or competitively inhibited. Finally, molecular docking was conducted to explore the binding conformations of sesquiterpene lactones into the binding sites of quorum sensing regulator proteins, CviR and CviR'. The computed binding energy data suggested that the blumeoidolides have a tendency to inhibit both CviR and CviR' with varying binding affinities. Vernonia eudesmanolide sesquiterpene lactones have the potential to be novel therapeutic agents, which might be important in reducing virulence and pathogenicity of drug-resistant bacteria in vivo.
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Affiliation(s)
- Abubakar Babando Aliyu
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Durban 4000, South Africa
| | - Neil Anthony Koorbanally
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Durban 4000, South Africa
| | - Brenda Moodley
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Durban 4000, South Africa
| | - Parvesh Singh
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Durban 4000, South Africa
| | - Hafizah Yousuf Chenia
- School of Life Sciences, University of KwaZulu-Natal, Westville Campus, Private Bag X54001, Durban 4000, South Africa.
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Nizalapur S, Kimyon Ö, Biswas NN, Gardner CR, Griffith R, Rice SA, Manefield M, Willcox M, Black DS, Kumar N. Design, synthesis and evaluation of N-aryl-glyoxamide derivatives as structurally novel bacterial quorum sensing inhibitors. Org Biomol Chem 2016; 14:680-693. [DOI: 10.1039/c5ob01973g] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bacteria cooperatively regulate the expression of many phenotypes through a mechanism called quorum sensing (QS).
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Affiliation(s)
| | - Önder Kimyon
- School of Biotechnology and Biomolecular Sciences (BABS)
- UNSW Australia
- Sydney
- Australia
| | | | | | | | - Scott A. Rice
- Centre for Marine Biology
- School of Biological
- Earth and Environmental Sciences
- UNSW Australia
- Sydney
| | - Mike Manefield
- School of Biotechnology and Biomolecular Sciences (BABS)
- UNSW Australia
- Sydney
- Australia
| | - Mark Willcox
- School of Optometry and Vision Science
- UNSW Australia
- Sydney
- Australia
| | | | - Naresh Kumar
- School of Chemistry
- UNSW Australia
- Sydney
- Australia
| |
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