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Roy S, Acosta JAM, Karak M, Ramirez-Velez I, Torikai K, Ren D, Barbosa LCA. Effects of Synthetic Tetronamides and Methylated Denigrins on Bacterial Quorum Sensing and Biofilm Formation. ACS OMEGA 2023; 8:37798-37807. [PMID: 37867724 PMCID: PMC10586261 DOI: 10.1021/acsomega.3c01729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 09/15/2023] [Indexed: 10/24/2023]
Abstract
Detrimental biofilms of bacterial pathogens cause chronic infections with a high-level tolerance to antibiotics. To identify new control agents, we synthesized and tested a total of 14 tetronamides (including 5 new compounds) and 6 denigrin intermediates on the model species Escherichia coli. At a concentration of 50 μg/mL, two tetronamides and two methylated denigrins exhibited significant inhibitory effects against biofilm formation of E. coli RP437, e.g., by 60 and 94%, respectively. Structural analysis of the tested compounds revealed that p-methoxybenzylidene and p-methoxyphenethyl moieties of denigrins are important for biofilm inhibition, while the former group is also essential to the activity against quorum sensing (QS) via AI-2. Specifically, tetramethyldenigrin B has strong inhibitory effects against both E. coli biofilm formation and AI-2-mediated QS and thus provides a promising lead structure for designing better control agents. Consistently, tetramethyldenigrin B also showed inhibitory activity against biofilm formation of uropathogenic E. coli. Together, these findings provide new insights for the rational design of novel biofilm and QS inhibitors.
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Affiliation(s)
- Sweta Roy
- Department
of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
| | - Jaime A. M. Acosta
- Department
of Chemistry, Universidade Federal de Minas
Gerais, Av. Pres. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG CEP 31270-901, Brazil
- Chemical
Technology School, Universidad Tecnológica
de Pereira, Carrera 27
#10-02, Barrio Álamos, Risaralda, Pereira Código postal 660003, Colombia
| | - Milandip Karak
- Department
of Chemistry, Universidade Federal de Minas
Gerais, Av. Pres. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG CEP 31270-901, Brazil
- Department
of Chemistry, Faculty of Science, Kyushu
University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Isabela Ramirez-Velez
- Department
of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
| | - Kohei Torikai
- Department
of Chemistry, Faculty of Science, Kyushu
University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Faculty
of Chemistry, National University of Uzbekistan
named after Mirzo Ulugbek, 4 University Str., Tashkent 100174, Uzbekistan
| | - Dacheng Ren
- Department
of Biomedical and Chemical Engineering and Civil and Environmental
Engineering and Biology, Syracuse University, Syracuse, New York 13244, United States
| | - Luiz C. A. Barbosa
- Department
of Chemistry, Universidade Federal de Minas
Gerais, Av. Pres. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG CEP 31270-901, Brazil
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Singh M, Kumar M, Nalawade SA, Puneeth Kumar DRGKR, Gopi HN. Cyclization of N-Boc-( E)-α,β-unsaturated γ-amino acid active esters into N-Boc-( Z)-α,β-unsaturated γ-lactams through E → Z isomerization. Org Biomol Chem 2023; 21:3766-3769. [PMID: 37097126 DOI: 10.1039/d3ob00127j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2023]
Abstract
Here, we are reporting the spontaneous transformation of the active esters of N-Boc protected E-α,β-unsaturated γ-amino acids into the corresponding Z-α,β-unsaturated γ-lactams with concomitant E → Z isomerization in the presence of a weak base. No cyclization was observed in the absence of the base. Analysis revealed that amide γ-NH is crucial for both lactamization and E → Z isomerization. This mild transformation provides easy access to the synthetically challenging α,β-unsaturated γ-lactams and also gives new insights into the E → Z isomerization of double bonds.
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Affiliation(s)
- Manjeet Singh
- Department of Chemistry, Indian Institute of Science Education and Research, Dr Homi Bhabha Road, Pashan, Pune-411008, India.
| | - Manish Kumar
- Department of Chemistry, Indian Institute of Science Education and Research, Dr Homi Bhabha Road, Pashan, Pune-411008, India.
| | - Sachin A Nalawade
- Department of Chemistry, Indian Institute of Science Education and Research, Dr Homi Bhabha Road, Pashan, Pune-411008, India.
| | - DRGKoppalu R Puneeth Kumar
- Department of Chemistry, Indian Institute of Science Education and Research, Dr Homi Bhabha Road, Pashan, Pune-411008, India.
| | - Hosahudya N Gopi
- Department of Chemistry, Indian Institute of Science Education and Research, Dr Homi Bhabha Road, Pashan, Pune-411008, India.
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Pompilio A, Scocchi M, Mangoni ML, Shirooie S, Serio A, Ferreira Garcia da Costa Y, Alves MS, Şeker Karatoprak G, Süntar I, Khan H, Di Bonaventura G. Bioactive compounds: a goldmine for defining new strategies against pathogenic bacterial biofilms? Crit Rev Microbiol 2023; 49:117-149. [PMID: 35313120 DOI: 10.1080/1040841x.2022.2038082] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Most human infectious diseases are caused by microorganisms growing as biofilms. These three-dimensional self-organized communities are embedded in a dense matrix allowing microorganisms to persistently inhabit abiotic and biotic surfaces due to increased resistance to both antibiotics and effectors of the immune system. Consequently, there is an urgent need for novel strategies to control biofilm-associated infections. Natural products offer a vast array of chemical structures and possess a wide variety of biological properties; therefore, they have been and continue to be exploited in the search for potential biofilm inhibitors with a specific or multi-locus mechanism of action. This review provides an updated discussion of the major bioactive compounds isolated from several natural sources - such as plants, lichens, algae, microorganisms, animals, and humans - with the potential to inhibit biofilm formation and/or to disperse established biofilms by bacterial pathogens. Despite the very large number of bioactive products, their exact mechanism of action often remains to be clarified and, in some cases, the identity of the active molecule is still unknown. This knowledge gap should be filled thus allowing development of these products not only as novel drugs to combat bacterial biofilms, but also as antibiotic adjuvants to restore the therapeutic efficacy of current antibiotics.
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Affiliation(s)
- Arianna Pompilio
- Department of Medical, Oral and Biotechnological Sciences, and Center for Advanced Studies and Technology (CAST), "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - Marco Scocchi
- Department of Life Sciences, University of Trieste, Trieste, Italy
| | - Maria Luisa Mangoni
- Department of Biochemical Sciences, Sapienza University of Rome, Laboratory affiliated to Pasteur Italia-Fondazione Cenci Bolognetti, Rome, Italy
| | - Samira Shirooie
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Annalisa Serio
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Teramo, Italy
| | - Ygor Ferreira Garcia da Costa
- Laboratory of Cellular and Molecular Bioactivity, Pharmaceutical Research Center, Faculty of Pharmacy, Federal University of Juiz de Fora, Juiz de Fora, Minas Gerais, Brazil
| | - Maria Silvana Alves
- Laboratory of Cellular and Molecular Bioactivity, Pharmaceutical Research Center, Faculty of Pharmacy, Federal University of Juiz de Fora, Juiz de Fora, Minas Gerais, Brazil
| | - Gökçe Şeker Karatoprak
- Department of Pharmacognosy, Faculty of Pharmacy, Erciyes University, Talas, Kayseri, Turkey
| | - Ipek Süntar
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, Etiler, Ankara, Turkey
| | - Haroon Khan
- Department of Pharmacy, Abdul Wali Khan University, Mardan, Pakistan
| | - Giovanni Di Bonaventura
- Department of Medical, Oral and Biotechnological Sciences, and Center for Advanced Studies and Technology (CAST), "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
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Zheng Z, Liu P, Zhang X, Jingguo xin, Yongjie wang, Zou X, Mei X, Zhang S, Zhang S. Strategies to improve bioactive and antibacterial properties of polyetheretherketone (PEEK) for use as orthopedic implants. Mater Today Bio 2022; 16:100402. [PMID: 36105676 PMCID: PMC9466655 DOI: 10.1016/j.mtbio.2022.100402] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 08/11/2022] [Accepted: 08/12/2022] [Indexed: 12/26/2022] Open
Abstract
Polyetheretherketone (PEEK) has gradually become the mainstream material for preparing orthopedic implants due to its similar elastic modulus to human bone, high strength, excellent wear resistance, radiolucency, and biocompatibility. Since the 1990s, PEEK has increasingly been used in orthopedics. Yet, the widespread application of PEEK is limited by its bio-inertness, hydrophobicity, and susceptibility to microbial infections. Further enhancing the osteogenic properties of PEEK-based implants remains a difficult task. This article reviews some modification methods of PEEK in the last five years, including surface modification of PEEK or incorporating materials into the PEEK matrix. For surface modification, PEEK can be modified by chemical treatment, physical treatment, or surface coating with bioactive substances. For PEEK composite material, adding bioactive filler into PEEK through the melting blending method or 3D printing technology can increase the biological activity of PEEK. In addition, some modification methods such as sulfonation treatment of PEEK or grafting antibacterial substances on PEEK can enhance the antibacterial performance of PEEK. These strategies aim to improve the bioactive and antibacterial properties of the modified PEEK. The researchers believe that these modifications could provide valuable guidance on the future design of PEEK orthopedic implants.
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Molecular Insight into Gene Response of Diorcinol- and Rubrolide-Treated Biofilms of the Emerging Pathogen Stenotrophomonas maltophilia. Microbiol Spectr 2022; 10:e0258221. [PMID: 35471093 PMCID: PMC9241881 DOI: 10.1128/spectrum.02582-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Stenotrophomonas maltophilia is a multidrug-resistant human opportunistic pathogen. S. maltophilia contributes to disease progression in cystic fibrosis patients and is found in wounds and infected tissues and on catheter surfaces. Due to its well-known multidrug resistance, it is difficult to treat S. maltophilia infections. Strain-specific susceptibility to antimicrobials has also been reported in several studies. Recently, three fungal diorcinols and 14 rubrolides were shown to reduce S. maltophilia K279a biofilm formation. Based on these initial findings, we were interested to extend this approach by testing a larger number of diorcinols and rubrolides and to understand the molecular mechanisms behind the observed antibiofilm effects. Of 52 tested compounds, 30 were able to significantly reduce the biofilm thickness by up to 85% ± 15% and had strong effects on mature biofilms. All compounds with antibiofilm activity also significantly affected the biofilm architecture. Additional RNA-sequencing data of diorcinol- and rubrolide-treated biofilm cells of two clinical isolates (454 and K279) identified a small set of shared genes that were affected by these potent antibiofilm compounds. Among these, genes for iron transport, general metabolism, and membrane biosynthesis were most strongly and differentially regulated. A further hierarchical clustering and detailed structural inspection of the diorcinols and rubrolides implied that a prenyl group as side chain of one of the phenyl groups of the diorcinols and an increasing degree of bromination of chlorinated rubrolides were possibly the cause of the strong antibiofilm effects. This study gives a deep insight into the effects of rubrolides and diorcinols on biofilms formed by the important global pathogen S. maltophilia. IMPORTANCE Combating Stenotrophomonasmaltophilia biofilms in clinical and industrial settings has proven to be challenging. S. maltophilia is multidrug resistant, and occurrence of resistance to commonly used drugs as well as to antibiotic combinations, such as trimethoprim-sulfamethoxazole, is now frequently reported. It is therefore now necessary to look beyond conventional and already existing antimicrobial drugs when battling S. maltophilia biofilms. Our study contains comprehensive and detailed data sets for diorcinol and rubrolide-treated S. maltophilia biofilms. The study defines genes and pathways affected by treatment with these different compounds. These results, together with the identified structural elements that may be crucial for their antibiofilm activity, build a strong backbone for further research on diorcinols and rubrolides as novel and potent antibiofilm compounds.
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6
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Geremias TC, Batistella MA, Magini RRS, Guelli U. de Souza SMA, Franco CV, Barbosa LCA, Pereira UA, Hinestroza JP, Pimenta AL, Ulson de Souza AA. Functionalization of poly(lactic‐co‐glycolic acid) nanofibrous membranes with antibiofilm compounds. CAN J CHEM ENG 2022. [DOI: 10.1002/cjce.24115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Thaise C. Geremias
- Centre for Research on Dental Implants (CEPID), School of Dentistry (ODT) Federal University of Santa Catarina (UFSC) Florianópolis Brazil
| | - Marcos A. Batistella
- Laboratory of Mass Transfer (LABMASSA), Department of Chemical and Food Engineering (EQA) Federal University of Santa Catarina (UFSC) Florianópolis Brazil
| | - Ricardo R. S. Magini
- Centre for Research on Dental Implants (CEPID), School of Dentistry (ODT) Federal University of Santa Catarina (UFSC) Florianópolis Brazil
| | - Selene M. A. Guelli U. de Souza
- Laboratory of Mass Transfer (LABMASSA), Department of Chemical and Food Engineering (EQA) Federal University of Santa Catarina (UFSC) Florianópolis Brazil
| | - Cesar V. Franco
- Laboratory of Inorganic Synthesis and Nanoparticles (LabSiN), Department of Chemistry Federal University of Santa Catarina (UFSC) Florianópolis Brazil
| | - Luiz C. A. Barbosa
- Department of Chemistry Universidade Federal de Minas Gerais, Campus Pampulha Belo Horizonte Brazil
| | - Ulisses A. Pereira
- Institute of Agricultural Sciences Universidade Federal de Minas Gerais, Campus Regional de Montes Claros Montes Claros Brazil
| | | | - Andréa L. Pimenta
- Department of Biology, ERRMECe, Université de Cergy Pontoise Maison Internationale de la Recherche Neuville sur Oise Cedex France
- Integrated Laboratories Technologies (InteLab), Department of Chemical and Food Engineering (EQA) Federal University of Santa Catarina (UFSC) Florianópolis SC 88040‐970 Brazil
| | - Antônio A. Ulson de Souza
- Laboratory of Mass Transfer (LABMASSA), Department of Chemical and Food Engineering (EQA) Federal University of Santa Catarina (UFSC) Florianópolis Brazil
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7
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Recent Updates on Microbial Biofilms in Periodontitis: An Analysis of In Vitro Biofilm Models. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1373:159-174. [DOI: 10.1007/978-3-030-96881-6_8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Moreira TA, Antolínez IV, Valença WO, Roy S, Ramirez I, Barbosa LCA, Ren D. Cadiolide analogues and their precursors as new inhibitors of bacterial quorum sensing and biofilm formation. Bioorg Med Chem Lett 2021; 57:128498. [PMID: 34896477 DOI: 10.1016/j.bmcl.2021.128498] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 12/02/2021] [Accepted: 12/05/2021] [Indexed: 11/16/2022]
Abstract
Bacterial quorum sensing (QS) and biofilm formation are promising targets for developing new therapies to treat chronic infections. Herein, we report the stereoselective synthesis of 18 new analogs of natural cadiolides. Among the new compounds, substances 8b, 8f, 8i, 9a, 9b and 9e completely inhibited the biofilm formation of Escherichia coli RP347 in vitro. In addition, compound 8b interfered acyl-homoserine lactone (AHL) mediated QS, while 9e interrupted the QS via autoinducer-2 (AI-2). Biological assays also revealed that synthetic intermediates alkynones are potent inhibitors of AI-2 and AHL-mediated QS. These results indicate that cadiolides and alkynones are good candidates for further structural modification for a new generation of more potent antimicrobial agents.
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Affiliation(s)
- Thais A Moreira
- Department of Chemistry, Universidade Federal de Minas Gerais, Av. Pres. Antônio Carlos, 6627, Campus Pampulha, CEP 31270-901 Belo Horizonte, MG, Brazil
| | - Isabel V Antolínez
- Department of Chemistry, Universidade Federal de Minas Gerais, Av. Pres. Antônio Carlos, 6627, Campus Pampulha, CEP 31270-901 Belo Horizonte, MG, Brazil
| | - Wagner O Valença
- Department of Chemistry, Universidade Federal de Minas Gerais, Av. Pres. Antônio Carlos, 6627, Campus Pampulha, CEP 31270-901 Belo Horizonte, MG, Brazil
| | - Sweta Roy
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, NY 13244, USA
| | - Isabela Ramirez
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, NY 13244, USA
| | - Luiz C A Barbosa
- Department of Chemistry, Universidade Federal de Minas Gerais, Av. Pres. Antônio Carlos, 6627, Campus Pampulha, CEP 31270-901 Belo Horizonte, MG, Brazil.
| | - Dacheng Ren
- Department of Biomedical and Chemical Engineering, Civil and Environmental Engineering, and Biology, Syracuse University, Syracuse, NY 13244, USA.
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9
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Roy D, Tharra P, Baire B. An Approach for the Generation of γ-Propenylidene-γ-butenolides and Application to the Total Synthesis of Rubrolides. Org Lett 2021; 23:5605-5610. [PMID: 34259007 DOI: 10.1021/acs.orglett.1c01529] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Design and synthesis of a new class of γ-butenolides, viz. β-aryl-γ-propenylidene-γ-butenolides, have been reported from β-aryl-Z-enoate propargylic alcohols in the presence of acid. Isolation of β-aryl-γ-propenylidene-γ-butenolides and their O18-isomer confirmed the intermediacy of the allenyl-lactonium ion as well as the cyclic-hemiacetal during the proposed mechanism. By utilizing the β-aryl-γ-methylenecyclohexenylidene-γ-butenolides as starting materials, a highly stereoselective and efficient approach has been developed for the syntheses of frameworks of rubrolide natural products. This strategy was further extended for the total synthesis of rubrolide E.
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Affiliation(s)
- Debayan Roy
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamilnadu, India
| | - Prabhakararao Tharra
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamilnadu, India
| | - Beeraiah Baire
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamilnadu, India
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Bracegirdle J, Keyzers RA. Marine-derived Polyaromatic Butenolides - Isolation, Synthesis and Biological Evaluations. Curr Pharm Des 2020; 26:4351-4361. [DOI: 10.2174/1381612826666200518110617] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 04/16/2020] [Indexed: 11/22/2022]
Abstract
Marine invertebrates, especially tunicates, are a lucrative resource for the discovery of new lead compounds
for the development of clinically utilized drugs. This review describes the isolation, synthesis and biological
activities of several classes of marine-derived butenolide natural products, namely rubrolides and related
cadiolides and prunolides. All relevant studies pertaining to these compounds up to the end of 2019 are included.
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Affiliation(s)
- Joe Bracegirdle
- School of Chemical and Physical Sciences, and Centre for Biodiscovery, Victoria University of Wellington, Wellington 6012, New Zealand
| | - Robert A. Keyzers
- School of Chemical and Physical Sciences, and Centre for Biodiscovery, Victoria University of Wellington, Wellington 6012, New Zealand
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11
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Chen Y, Caneli G, Almousa R, Wen X, Anderson GG, Xie D. An antibacterial dental light-cured glass-ionomer cement with improved hardness. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2020; 31:2362-2380. [PMID: 32807032 DOI: 10.1080/09205063.2020.1812039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
An antibacterial dental light-cured glass-ionomer cement has been developed and evaluated. An antibacterial furanone derivative was synthesized and covalently attached onto the surface of alumina filler particles. The formed antibacterial fillers were then mixed into a light-curable glass-ionomer cement formulation. Surface hardness and bacterial viability were used to evaluate the modified cements. Effects of coated furanone moiety content on the modified fillers, modified alumina filler particle size and loading, and total glass filler content were investigated. Results showed that increasing antibacterial furanone content, modified particle size and loading, and total glass filler content generally increased surface hardness. Increasing furanone moiety, filler loading and total filler content increased antibacterial activity. On the other hand, increasing particle size decreased antibacterial activity. The leaching tests indicate that the modified experimental cement showed no leachable antibacterial component to bacteria and cells.
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Affiliation(s)
- Yong Chen
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University at Indianapolis, Indianapolis, IN, USA
| | - Gulsah Caneli
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University at Indianapolis, Indianapolis, IN, USA
| | - Rashed Almousa
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University at Indianapolis, Indianapolis, IN, USA
| | - Xin Wen
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University at Indianapolis, Indianapolis, IN, USA
| | - Gregory G Anderson
- Department of Biology, Purdue School of Science, Indiana University-Purdue University at Indianapolis, Indianapolis, IN, USA
| | - Dong Xie
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University at Indianapolis, Indianapolis, IN, USA
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Xu B, Albert Ng TC, Huang S, Shi X, Ng HY. Feasibility of isolated novel facultative quorum quenching consortiums for fouling control in an AnMBR. WATER RESEARCH 2020; 114:151-180. [PMID: 31706123 DOI: 10.1016/j.watres.2017.02.006] [Citation(s) in RCA: 485] [Impact Index Per Article: 121.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 01/10/2017] [Accepted: 02/02/2017] [Indexed: 05/06/2023]
Abstract
Anaerobic membrane bioreactor (AnMBR) technology is being recognized as an appealing strategy for wastewater treatment, however, severity of membrane fouling inhibits its widespread implementations. This study engineered novel facultative quorum quenching consortiums (FQQs) coping with membrane fouling in AnMBRs with preliminary analysis for their quorum quenching (QQ) performances. Herein, Acyl-homoserine lactones (AHLs)-based quorum sensing (QS) in a lab-scale AnMBR initially revealed that N-Hexanoyl-dl-homoserine lactone (C6-HSL), N-Octanoyl-dl-homoserine lactone (C8-HSL) and N-Decanoyl-dl-homoserine lactone (C10-HSL) were the dominant AHLs in AnMBRs in this study. Three FQQs, namely, FQQ-C6, FQQ-C8 and FQQ-C10, were harvested after anaerobic screening of aerobic QQ consortiums (AeQQs) which were isolated by enrichment culture, aiming to degrade C6-HSL, C8-HSL and C10-HSL, respectively. Growth of FQQ-C6 and FQQ-C10 using AHLs as carbon source under anaerobic condition was significantly faster than those using acetate, congruously suggesting that their QQ performance will not be compromised in AnMBRs. All FQQs degraded a wide range of AHLs pinpointing their extensive QQ ability. FQQ-C6, FQQ-C8 and FQQ-C10 remarkably alleviated extracellular polymeric substances (EPS) production in a lab-scale AnMBR by 72.46%, 35.89% and 65.88%, respectively, and FQQ-C6 retarded membrane fouling of the AnMBR by 2 times. Bioinformatics analysis indicated that there was a major shift in dominant species from AeQQs to FQQs where Comamonas sp., Klebsiella sp., Stenotrophomonas sp. and Ochrobactrum sp. survived after anaerobic screening and were the majority in FQQs. High growth rate utilizing AHLs under anaerobic condition and enormous EPS retardation efficiency in FQQ-C6 and FQQ-C10 could be attributed to Comamonas sp.. These findings demonstrated that FQQs could be leveraged for QQ under anaerobic systems. We believe that this was the first work proposing a bacterial pool of facultative QQ candidates holding biotechnological promises for membrane fouling control in AnMBRs.
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Affiliation(s)
- Boyan Xu
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576
| | - Tze Chiang Albert Ng
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576
| | - Shujuan Huang
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576
| | - Xueqing Shi
- School of Environmental and Municipal Engineering, Qingdao University of Technology, 11 Fushun Road, Qingdao, 266033, PR China
| | - How Yong Ng
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576; National University of Singapore Environmental Research Institute, 5A Engineering Drive 1, 117411, Singapore.
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Marine Pharmacology in 2014-2015: Marine Compounds with Antibacterial, Antidiabetic, Antifungal, Anti-Inflammatory, Antiprotozoal, Antituberculosis, Antiviral, and Anthelmintic Activities; Affecting the Immune and Nervous Systems, and Other Miscellaneous Mechanisms of Action. Mar Drugs 2019; 18:md18010005. [PMID: 31861527 PMCID: PMC7024264 DOI: 10.3390/md18010005] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 12/12/2019] [Accepted: 12/14/2019] [Indexed: 12/31/2022] Open
Abstract
The systematic review of the marine pharmacology literature from 2014 to 2015 was completed in a manner consistent with the 1998-2013 reviews of this series. Research in marine pharmacology during 2014-2015, which was reported by investigators in 43 countries, described novel findings on the preclinical pharmacology of 301 marine compounds. These observations included antibacterial, antifungal, antiprotozoal, antituberculosis, antiviral, and anthelmintic pharmacological activities for 133 marine natural products, 85 marine compounds with antidiabetic, and anti-inflammatory activities, as well as those that affected the immune and nervous system, and 83 marine compounds that displayed miscellaneous mechanisms of action, and may probably contribute to novel pharmacological classes upon further research. Thus, in 2014-2015, the preclinical marine natural product pharmacology pipeline provided novel pharmacology as well as new lead compounds for the clinical marine pharmaceutical pipeline, and thus continued to contribute to ongoing global research for alternative therapeutic approaches to many disease categories.
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14
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Jennings LK, Robertson LP, Rudolph KE, Munn AL, Carroll AR. Anti-prion Butenolides and Diphenylpropanones from the Australian Ascidian Polycarpa procera. JOURNAL OF NATURAL PRODUCTS 2019; 82:2620-2626. [PMID: 31436981 DOI: 10.1021/acs.jnatprod.9b00551] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A library of 500 Australian marine invertebrate extracts was screened for anti-prion activity using a yeast-based assay, and this resulted in an extract from the ascidian Polycarpa procera showing potent activity. Purification of this extract led to the isolation of six new butenolide metabolites, the procerolides 1-4 and two related diphenylpropanones, the procerones 5 and 6, as the bioactive components. The structures of 1-6 were elucidated from the analysis of 1D/2D NMR and MS data, and their absolute configurations determined from comparison of experimental and computed ECD data. Compounds 1-6 were tested for anti-prion activity in a yeast-based assay, and 1 and 5 displayed potent bioactivity (EC50 of 23 and 29 μM, respectively) comparable to the potently active anti-prion compound guanabenz. The procerolides and procerones are the first anti-prion compounds to be reported from ascidians, indicating that ascidians may be an untapped source of new lead anti-prion compounds.
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Affiliation(s)
- Laurence K Jennings
- Environmental Futures Research Institute , Griffith University (Gold Coast campus) , Parklands Drive , Southport , QLD 4222 , Australia
- School of Environment and Science , Griffith University (Gold Coast campus) , Parklands Drive , Southport , QLD 4222 , Australia
| | - Luke P Robertson
- Environmental Futures Research Institute , Griffith University (Gold Coast campus) , Parklands Drive , Southport , QLD 4222 , Australia
- School of Environment and Science , Griffith University (Gold Coast campus) , Parklands Drive , Southport , QLD 4222 , Australia
| | - Kathryn E Rudolph
- School of Environment and Science , Griffith University (Gold Coast campus) , Parklands Drive , Southport , QLD 4222 , Australia
| | - Alan L Munn
- Menzies Health Institute Queensland , Griffith University (Gold Coast campus) , Parklands Drive , Southport , QLD 4222 , Australia
| | - Anthony R Carroll
- Environmental Futures Research Institute , Griffith University (Gold Coast campus) , Parklands Drive , Southport , QLD 4222 , Australia
- School of Environment and Science , Griffith University (Gold Coast campus) , Parklands Drive , Southport , QLD 4222 , Australia
- Griffith Institute for Drug Discovery , Griffith University (Brisbane Innovation Park) , Don Young Road , Nathan , QLD 4111 , Australia
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15
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Yong YY, Dykes GA, Choo WS. Biofilm formation by staphylococci in health-related environments and recent reports on their control using natural compounds. Crit Rev Microbiol 2019; 45:201-222. [PMID: 30786799 DOI: 10.1080/1040841x.2019.1573802] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Staphylococci are Gram-positive bacteria that are ubiquitous in the environment and able to form biofilms on a range of surfaces. They have been associated with a range of human health issues such as medical device-related infection, localized skin infection, or direct infection caused by toxin production. The extracellular material produced by these bacteria resists antibiotics and host defence mechanism which complicates the treatment process. The commonly reported Staphylococcus species are Staphylococcus aureus and S. epidermidis as they inhabit human bodies. However, the emergence of other staphylococci, such as S. haemolyticus, S. lugdunensis, S. saprophyticus, S. capitis, S. saccharolyticus, S. warneri, S. cohnii, and S. hominis, is also of concern and they have been associated with biofilm formation. This review critically assesses recent cases on the biofilm formation by S. aureus, S. epidermidis, and other staphylococci reported in health-related environments. The control of biofilm formation by staphylococci using natural compounds is specifically discussed as they represent potential anti-biofilm agents which may reduce the burden of antibiotic resistance.
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Affiliation(s)
- Yi Yi Yong
- a School of Science , Monash University Malaysia , Selangor , Malaysia
| | - Gary A Dykes
- b School of Public Health , Curtin University , Bentley , Australia
| | - Wee Sim Choo
- a School of Science , Monash University Malaysia , Selangor , Malaysia
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16
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Mairink SZ, Barbosa LCA, Boukouvalas J, Pedroso SHSP, Santos SG, Magalhães PP, Farias LM. Synthesis and evaluation of cadiolide analogues as inhibitors of bacterial biofilm formation. Med Chem Res 2018. [DOI: 10.1007/s00044-018-2246-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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17
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Almohaywi B, Taunk A, Wenholz DS, Nizalapur S, Biswas NN, Ho KKK, Rice SA, Iskander G, Black DS, Griffith R, Kumar N. Design and Synthesis of Lactams Derived from Mucochloric and Mucobromic Acids as Pseudomonas aeruginosa Quorum Sensing Inhibitors. Molecules 2018; 23:molecules23051106. [PMID: 29735954 PMCID: PMC6100351 DOI: 10.3390/molecules23051106] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 05/04/2018] [Accepted: 05/05/2018] [Indexed: 11/24/2022] Open
Abstract
Bacterial infections, particularly hospital-acquired infections caused by Pseudomonas aeruginosa, have become a global threat with a high mortality rate. Gram-negative bacteria including P. aeruginosa employ N-acyl homoserine lactones (AHLs) as chemical signals to regulate the expression of pathogenic phenotypes through a mechanism called quorum sensing (QS). Recently, strategies targeting bacterial behaviour or QS have received great attention due to their ability to disarm rather than kill pathogenic bacteria, which lowers the evolutionary burden on bacteria and the risk of resistance development. In the present study, we report the design and synthesis of N-alkyl- and N-aryl 3,4 dichloro- and 3,4-dibromopyrrole-2-one derivatives through the reductive amination of mucochloric and mucobromic acid with aliphatic and aromatic amines. The quorum sensing inhibition (QSI) activity of the synthesized compounds was determined against a P. aeruginosa MH602 reporter strain. The phenolic compounds exhibited the best activity with 80% and 75% QSI at 250 µM and were comparable in activity to the positive control compound Fu-30. Computational docking studies performed using the LasR receptor protein of P. aeruginosa suggested the importance of hydrogen bonding and hydrophobic interactions for QSI.
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Affiliation(s)
- Basmah Almohaywi
- School of Chemistry, UNSW Australia, Sydney, NSW 2052, Australia.
- School of Pharmacy, King Khalid University, Abha 62529, Saudi Arabia.
| | - Aditi Taunk
- School of Chemistry, UNSW Australia, Sydney, NSW 2052, Australia.
| | - Daniel S Wenholz
- School of Chemistry, UNSW Australia, Sydney, NSW 2052, Australia.
| | | | | | - Kitty K K Ho
- School of Chemistry, UNSW Australia, Sydney, NSW 2052, Australia.
| | - Scott A Rice
- The Singapore Centre of Environmental Life Sciences Engineering, Nanyang Technological University, Singapore 639798, Singapore.
| | - George Iskander
- School of Chemistry, UNSW Australia, Sydney, NSW 2052, Australia.
| | - David StC Black
- School of Chemistry, UNSW Australia, Sydney, NSW 2052, Australia.
| | - Renate Griffith
- School of Medical Science, UNSW Australia, Sydney, NSW 2052, Australia.
| | - Naresh Kumar
- School of Chemistry, UNSW Australia, Sydney, NSW 2052, Australia.
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18
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de Almeida J, Pimenta AL, Pereira UA, Barbosa LCA, Hoogenkamp MA, van der Waal SV, Crielaard W, Felippe WT. Effects of three γ-alkylidene-γ-lactams on the formation of multispecies biofilms. Eur J Oral Sci 2018. [PMID: 29517121 DOI: 10.1111/eos.12411] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This study evaluated the inhibitory effects of lactams on Streptococcus mutans, Enterococcus faecalis, and Candida glabrata multispecies biofilm formation. γ-Alkylidene-γ-lactams 1, 2, and 3 [solubilized in 3.5% dimethyl sulfoxide (DMSO)] were tested. Glass coverslips were conditioned with either the lactams or 3.5% DMSO (control) for 1 h, inoculated with microbial cultures, and incubated for 48 h. To assess the effect of the lactams on biofilm formation, the following parameters were determined: the biofilm biomass (by both crystal violet staining and protein determination); the amount of insoluble polysaccharides of the extracellular matrix; and the number of viable and total cells [by both colony-forming unit counting and quantitative real-time PCR (qPCR)]. Data were analysed using one-way anova and post-hoc Tukey tests. Lactams 1, 2, and 3 promoted a statistically significant reduction in the amount of biofilm biomass, but only lactam 3 resulted in a statistically significant reduction in the number of attached viable E. faecalis. Both total protein content and the amount of extracellular polysaccharides decreased significantly. The effects of γ-alkylidene-γ-lactams 1, 2, and 3 on the inhibition of multispecies biofilm formation were evident by their ability to reduce the amount of protein and extracellular polysaccharides.
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Affiliation(s)
- Josiane de Almeida
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, the Netherlands.,Department of Endodontics, Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil.,Department of Endodontics, University of Southern Santa Catarina (UNISUL), Palhoça, SC, Brazil
| | - Andrea L Pimenta
- Department of Periodontics, Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil.,Department of Biologie, Université de Cergy Pontoisé, Cergy Pontoise, France
| | - Ulisses A Pereira
- Department of Chemistry, Federal University of Viçosa (UFV), Viçosa, MG, Brazil
| | - Luiz C A Barbosa
- Department of Chemistry, Federal University of Viçosa (UFV), Viçosa, MG, Brazil.,Department of Chemistry, Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Michel A Hoogenkamp
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - Suzette V van der Waal
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, the Netherlands.,Department of Endodontics, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - Wim Crielaard
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - Wilson T Felippe
- Department of Endodontics, Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil
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19
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Sordi MB, Moreira TA, Montero JFD, Barbosa LC, Benfatti CAM, Magini RDS, Pimenta ADL, Souza JCMD. Effect of γ-lactones and γ-lactams compounds on Streptococcus mutans biofilms. J Appl Oral Sci 2018; 26:e20170065. [PMID: 29489934 PMCID: PMC5831975 DOI: 10.1590/1678-7757-2017-0065] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Accepted: 09/14/2017] [Indexed: 01/31/2023] Open
Abstract
Considering oral diseases, antibiofilm compounds can decrease the accumulation of pathogenic species such as Streptococcus mutans at micro-areas of teeth, dental restorations or implant-supported prostheses. OBJECTIVE To assess the effect of thirteen different novel lactam-based compounds on the inhibition of S. mutans biofilm formation. MATERIAL AND METHODS We synthesized compounds based on γ-lactones analogues from rubrolides by a mucochloric acid process and converted them into their corresponding γ-hydroxy-γ-lactams by a reaction with isobutylamine and propylamine. Compounds concentrations ranging from 0.17 up to 87.5 μg mL-1 were tested against S. mutans. We diluted the exponential cultures in TSB and incubated them (37°C) in the presence of different γ-lactones or γ-lactams dilutions. Afterwards, we measured the planktonic growth by optical density at 630 nm and therefore assessed the biofilm density by the crystal violet staining method. RESULTS Twelve compounds were active against biofilm formation, showing no effect on bacterial viability. Only one compound was inactive against both planktonic and biofilm growth. The highest biofilm inhibition (inhibition rate above 60%) was obtained for two compounds while three other compounds revealed an inhibition rate above 40%. CONCLUSIONS Twelve of the thirteen compounds revealed effective inhibition of S. mutans biofilm formation, with eight of them showing a specific antibiofilm effect.
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Affiliation(s)
- Mariane Beatriz Sordi
- Centro de Ensino e Pesquisa em Implantes Dentários, Departamento de Odontologia, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brasil
| | - Thaís Altoé Moreira
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brasil
| | - Juan Felipe Dumes Montero
- Centro de Ensino e Pesquisa em Implantes Dentários, Departamento de Odontologia, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brasil
| | - Luis Cláudio Barbosa
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brasil
| | - César Augusto Magalhães Benfatti
- Centro de Ensino e Pesquisa em Implantes Dentários, Departamento de Odontologia, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brasil
| | - Ricardo de Souza Magini
- Centro de Ensino e Pesquisa em Implantes Dentários, Departamento de Odontologia, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brasil
| | - Andréa de Lima Pimenta
- Laboratório de Tecnologias Integradas, Departamento de Engenharia Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brasil
| | - Júlio César Matias de Souza
- Centro de Ensino e Pesquisa em Implantes Dentários, Departamento de Odontologia, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brasil
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20
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Shiri M, Ranjbar M, Yasaei Z, Zamanian F, Notash B. Palladium-catalyzed tandem reaction of 2-chloroquinoline-3-carbaldehydes and isocyanides. Org Biomol Chem 2018; 15:10073-10081. [PMID: 29168530 DOI: 10.1039/c7ob02043k] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A facile domino reaction of 2-chloroquinoline-3-carbaldehydes in one and two equivalents of isocyanide has been investigated. Three-component reactions of 2-chloroquinoline-3-carbaldehydes, isocyanides and amines are also described. In this Pd-catalyzed reaction under controlled conditions, three novel types of quinoline derivatives were formed via amidation, lactamization or carbamate formation along with the formation of C-C, C-N, and C-O bonds in a one-pot procedure.
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Affiliation(s)
- Morteza Shiri
- Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University, Vanak, Tehran 1993893973, Iran.
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21
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Shabeer M, Barbosa LCA, Karak M, Coelho ACS, Takahashi JA. Thiobarbiturates as potential antifungal agents to control human infections caused by Candida and Cryptococcus species. Med Chem Res 2018. [DOI: 10.1007/s00044-017-2126-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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23
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Natural abenquines and synthetic analogues: Preliminary exploration of their cytotoxic activity. Bioorg Med Chem Lett 2017; 27:1141-1144. [DOI: 10.1016/j.bmcl.2017.01.079] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 01/24/2017] [Accepted: 01/25/2017] [Indexed: 11/23/2022]
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24
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Damodar K, Kim JK, Jun JG. Efficient, collective synthesis and nitric oxide inhibitory activity of rubrolides E, F, R, S and their derivatives. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2016.11.096] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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25
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Howard JK, Rihak KJ, Hyland CJT, Bissember AC, Smith JA. Visible light dye-photosensitised oxidation of pyrroles using a simple LED photoreactor. Org Biomol Chem 2016; 14:8873-8880. [PMID: 27722413 DOI: 10.1039/c6ob01719c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photooxidation of pyrrole is typically low yielding due to the absorbance of ultraviolet light, which leads to uncontrolled polymerisation and decomposition. Presented herein is the development of a simple and cost-effective photoreactor utilising Light Emitting Diodes (LEDs) as the light source, and its application to the dye-sensitised oxidation of a range of pyrroles to give corresponding 3-pyrrolin-2-ones. The broader applicability of this approach to the generation of 1O2 is also explored.
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Affiliation(s)
- James K Howard
- School of Physical Sciences - Chemistry, University of Tasmania, Australia.
| | - Kieran J Rihak
- School of Physical Sciences - Chemistry, University of Tasmania, Australia.
| | | | - Alex C Bissember
- School of Physical Sciences - Chemistry, University of Tasmania, Australia.
| | - Jason A Smith
- School of Physical Sciences - Chemistry, University of Tasmania, Australia.
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26
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Rodríguez-Hernández D, Barbosa LCA, Demuner AJ, de Almeida RM, Fujiwara RT, Ferreira SR. Highly potent anti-leishmanial derivatives of hederagenin, a triperpenoid from Sapindus saponaria L. Eur J Med Chem 2016; 124:153-159. [PMID: 27569196 DOI: 10.1016/j.ejmech.2016.08.030] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 08/01/2016] [Accepted: 08/14/2016] [Indexed: 12/15/2022]
Abstract
Leishmaniasis is a neglected tropical disease (NTDs), endemic in 88 countries that affect more than 12 million people. Current drugs are limited due to their toxicity, development of biological resistance, length of treatment and high cost. Thus, the search for new effective and less toxic treatments is an urgent need. In this study, we report the synthesis of 3 new amide derivatives of hederagenin (22-24) with yields between 70% and 90%, along with 57 other derivatives of hederagenin (1-21, 25-60) carrying different groups at C-28 previously reported by our group, and the results of their in vitro ability to inhibit the growth of Leishmania infantum. Some derivatives (3, 4, 44, 49 and 52), showed activity at micromolar level and low toxicity against BGM and HepG2 cells. Moreover, the ability of hederagenin derivatives 3 (IC50 = 9.7 μM), 4 (12 μM), 44 (11 μM) and 49 (2 μM), to prevent proliferation of intracellular amastigote forms of L. infantum and their higher selectivity index and low toxicity compared to commercial positive drug control of choice (potassium antimonyl tartrate trihydrate) (IC50 = 80 μM, SI = 0.1), make these compounds promising candidates for the treatment of leishmaniasis.
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Affiliation(s)
- Diego Rodríguez-Hernández
- Department of Chemistry, Universidade Federal de Minas Gerais, Av. Pres Antônio Carlos 6627, Campus Pampulha, CEP 31270-901, Belo Horizonte, MG, Brazil; Department of Chemistry, Universidade Federal de Viçosa, Av. P. H Rolf, s/n, CEP 36570-000, Viçosa, MG, Brazil
| | - Luiz C A Barbosa
- Department of Chemistry, Universidade Federal de Minas Gerais, Av. Pres Antônio Carlos 6627, Campus Pampulha, CEP 31270-901, Belo Horizonte, MG, Brazil; Department of Chemistry, Universidade Federal de Viçosa, Av. P. H Rolf, s/n, CEP 36570-000, Viçosa, MG, Brazil.
| | - Antonio J Demuner
- Department of Chemistry, Universidade Federal de Viçosa, Av. P. H Rolf, s/n, CEP 36570-000, Viçosa, MG, Brazil
| | - Raquel M de Almeida
- Department of Parasitology, Universidade Federal de Minas Gerais, Av. Pres Antônio Carlos 6627, Campus Pampulha, CEP 31270-901, Belo Horizonte, MG, Brazil
| | - Ricardo T Fujiwara
- Department of Parasitology, Universidade Federal de Minas Gerais, Av. Pres Antônio Carlos 6627, Campus Pampulha, CEP 31270-901, Belo Horizonte, MG, Brazil.
| | - Sebastião R Ferreira
- Department of Parasitology, Universidade Federal de Minas Gerais, Av. Pres Antônio Carlos 6627, Campus Pampulha, CEP 31270-901, Belo Horizonte, MG, Brazil
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27
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Montero JFD, Barbosa LCA, Pereira UA, Barra GM, Fredel MC, Benfatti CAM, Magini RS, Pimenta AL, Souza JCM. Chemical, microscopic, and microbiological analysis of a functionalized poly-ether-ether-ketone-embedding antibiofilm compounds. J Biomed Mater Res A 2016; 104:3015-3020. [PMID: 27458927 DOI: 10.1002/jbm.a.35842] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 06/24/2016] [Indexed: 11/12/2022]
Abstract
Poly-ether-ether-ketone (PEEK) is currently introduced as an alternative material for orthopedic implants due to its biocompatibility and low elastic modulus compared to titanium. Also, a sulphonation treatment can functionalize PEEK to embed therapeutical substances. The objective of this work was to functionalize a PEEK film to incorporate novel lactam-based antibiofilms compounds. PEEK samples were functionalized by sulphuric acid treatment and then dissolved in dimethylsulfoxide, where lactams were added to be incorporated into the polymer. A dip-coating technique was used to synthesize a thin film on a glass-based substrate. The degree of sulfonation (DS) and the incorporation of lactams into sulphonated PEEK (sPEEK) were analyzed by Fourier transform infrared spectroscopy, nuclear magnetic resonance, thermogravimetric analysis (TGA), and scanning electron microscopy. A DS of 65% was obtained and TGA curves confirmed the presence of SO3 H and lactams in the sPEEK structure. The growth of Streptococcus mutans biofilm decreased on sPEEK surface containing lactams when compared to sPEEK free of lactams. That indicated the antibiofilm activity of those compounds was maintained after incorporation into sPEEK. Planktonic growth analysis showed no long distant effects of sPEEK containing lactams, indicating that no systemic effects should be expected upon clinical uses of medical devices produced with lactam-treated sPEEK. Results revealed that inclusion of lactams into sPEEK represents a good alternative for the production of biomaterials resistant to bacterial accumulation. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 3015-3020, 2016.
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Affiliation(s)
- Juan F D Montero
- Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Federal University of Santa Catarina (UFSC), Florianópolis/SC, 88040-900, Brazil
| | - Luiz C A Barbosa
- Department of Chemistry, Federal University of Minas Gerais (UFMG), Av. Pres. Antônio Carlos, 6627, Campus Pampulha, CEP 31270-901, Belo Horizonte, MG, Brazil.,Department of Chemistry, Federal University of Viçosa, Viçosa/MG 36570-000, Brazil
| | - Ulisses A Pereira
- Department of Chemistry, Federal University of Viçosa, Viçosa/MG 36570-000, Brazil
| | - Guilherme M Barra
- Department of Mechanical Engineering (EMC), Federal University of Santa Catarina (UFSC), Florianópolis/SC, 88040-900, Brazil
| | - Márcio C Fredel
- Department of Mechanical Engineering (EMC), Federal University of Santa Catarina (UFSC), Florianópolis/SC, 88040-900, Brazil
| | - Cesar A M Benfatti
- Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Federal University of Santa Catarina (UFSC), Florianópolis/SC, 88040-900, Brazil
| | - Ricardo S Magini
- Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Federal University of Santa Catarina (UFSC), Florianópolis/SC, 88040-900, Brazil
| | - Andréa L Pimenta
- Department of Biologie, Université De Cergy Pontoise, 2, Av. Adolphe Chauvin, Cergy Pontoise, 95302, France
| | - Júlio C M Souza
- Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Federal University of Santa Catarina (UFSC), Florianópolis/SC, 88040-900, Brazil. .,Center for Microelectromechanical Systems (CMEMS), Department of Mechanical Engineering (DEM), Guimarães, 4800-058, Portugal.
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28
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Cascioferro S, Maggio B, Raffa D, Raimondi MV, Cusimano MG, Schillaci D, Manachini B, Plescia F, Daidone G. Synthesis and biofilm formation reduction of pyrazole-4-carboxamide derivatives in some Staphylococcus aureus strains. Eur J Med Chem 2016; 123:58-68. [PMID: 27474923 DOI: 10.1016/j.ejmech.2016.07.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 07/14/2016] [Accepted: 07/15/2016] [Indexed: 12/11/2022]
Abstract
The ability of several N-phenyl-1H-pyrazole-4-carboxamide derivatives and other pyrazoles opportunely modified at the positions 3, 4 and 5, to reduce the formation of the biofilm in some Staphylococcus aureus strains (ATCC 29213, ATCC 25923 and ATCC 6538) were investigated. All the tested compounds were able, although to a different extent, to reduce the biofilm formation of the three bacterial strains considered. Among these, the 1-(2,5-dichlorophenyl)-5-methyl-N-phenyl-1H-pyrazole-4-carboxamide 14 resulted as the best inhibitor of biofilm formation showing an IC50 ranging from 2.3 to 32 μM, against all the three strains of S. aureus. Compound 14 also shows a good protective effect in vivo by improving the survival of wax moth larva (Galleria mellonella) infected with S. aureus ATCC 29213. These findings indicate that 14d is a potential lead compound for the development of new anti-virulence agents against S. aureus infections.
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Affiliation(s)
- Stella Cascioferro
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, Via Archirafi, 32, 90123, Palermo, Italy; IEMEST, Istituto Euromediterraneo di Scienza e Tecnologia, via Emerico Amari, 123, 90139, Palermo, Italy
| | - Benedetta Maggio
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, Via Archirafi, 32, 90123, Palermo, Italy.
| | - Demetrio Raffa
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, Via Archirafi, 32, 90123, Palermo, Italy.
| | - Maria Valeria Raimondi
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, Via Archirafi, 32, 90123, Palermo, Italy
| | - Maria Grazia Cusimano
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, Via Archirafi, 32, 90123, Palermo, Italy
| | - Domenico Schillaci
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, Via Archirafi, 32, 90123, Palermo, Italy
| | - Barbara Manachini
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, Via Archirafi, 32, 90123, Palermo, Italy
| | - Fabiana Plescia
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, Via Archirafi, 32, 90123, Palermo, Italy
| | - Giuseppe Daidone
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, Via Archirafi, 32, 90123, Palermo, Italy
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Xavier JG, Geremias TC, Montero JFD, Vahey BR, Benfatti CAM, Souza JCM, Magini RS, Pimenta AL. Lactam inhibiting Streptococcus mutans growth on titanium. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 68:837-841. [PMID: 27524086 DOI: 10.1016/j.msec.2016.07.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 06/28/2016] [Accepted: 07/05/2016] [Indexed: 10/21/2022]
Abstract
The aim of this work was to analyze the activity of novel synthetic lactams on preventing biofilm formation on titanium surfaces. Titanium (Ti6Al4V) samples were exposed to Streptococcus mutans cultures in the presence or absence of a synthetic lactam. After 48h incubation, planktonic growth was determined by spectrophotometry. Biofilm was evaluated by crystal violet staining and colony forming units (CFU·ml(-)(1)), followed by scanning electron microscopy (SEM). Results showed that the average of adhered viable cells was approximately 1.5×10(2)CFU/ml in the presence of lactam and 4×10(2)CFU/ml in its absence. This novel compound was considerable active in reducing biofilm formation over titanium surfaces, indicating its potential for the development of antimicrobial drugs targeting the inhibition of the initial stages of bacterial biofilms on dental implants abutments.
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Affiliation(s)
- J G Xavier
- Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Federal University of Santa Catarina (UFSC), Florianópolis/SC, 88040-900, Brazil
| | - T C Geremias
- Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Federal University of Santa Catarina (UFSC), Florianópolis/SC, 88040-900, Brazil
| | - J F D Montero
- Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Federal University of Santa Catarina (UFSC), Florianópolis/SC, 88040-900, Brazil
| | - B R Vahey
- Herman Ostrow School of Dentistry of USC, 925 W 34 St, Los Angeles, CA 90089, United States
| | - C A M Benfatti
- Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Federal University of Santa Catarina (UFSC), Florianópolis/SC, 88040-900, Brazil
| | - J C M Souza
- Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Federal University of Santa Catarina (UFSC), Florianópolis/SC, 88040-900, Brazil
| | - R S Magini
- Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Federal University of Santa Catarina (UFSC), Florianópolis/SC, 88040-900, Brazil
| | - A L Pimenta
- Department of Biologia, ERRMECe, Université de Cergy Pontoise, 2, Av. Adolphe Chauvin 95302 Cergy, Pontoise, France; Integrated Laboratories Technologies (InteLab), Dept. Chemical and Food Engineering (EQA), Federal University of Santa Catarina (UFSC), Florianópolis/SC, 88040-970, Brazil.
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30
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Karak M, Acosta JAM, Barbosa LCA, Boukouvalas J. Late-Stage Bromination Enables the Synthesis of Rubrolides B, I, K, and O. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600473] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Milandip Karak
- Department of Chemistry; Universidade Federal de Minas Gerais; Av. Pres. Antônio Carlos, 6627, Campus Pampulha CEP 31270-901 Belo Horizonte MG Brazil
- Department of Chemistry; Universidade Federal de Viçosa; Av. Peter Henry Rolfs, s/n Campus Universitário CEP 36570-900 Viçosa MG Brazil
| | - Jaime A. M. Acosta
- Department of Chemistry; Universidade Federal de Minas Gerais; Av. Pres. Antônio Carlos, 6627, Campus Pampulha CEP 31270-901 Belo Horizonte MG Brazil
| | - Luiz C. A. Barbosa
- Department of Chemistry; Universidade Federal de Minas Gerais; Av. Pres. Antônio Carlos, 6627, Campus Pampulha CEP 31270-901 Belo Horizonte MG Brazil
- Department of Chemistry; Universidade Federal de Viçosa; Av. Peter Henry Rolfs, s/n Campus Universitário CEP 36570-900 Viçosa MG Brazil
| | - John Boukouvalas
- Department of Chemistry; Universidade Federal de Minas Gerais; Av. Pres. Antônio Carlos, 6627, Campus Pampulha CEP 31270-901 Belo Horizonte MG Brazil
- Department of Chemistry; Université Laval; Pavillon Alexandre-Vachon, 1045 Avenue de la Médecine G1V 0A6 Quebec City, Quebec Canada
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31
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Novel hederagenin–triazolyl derivatives as potential anti-cancer agents. Eur J Med Chem 2016; 115:257-67. [DOI: 10.1016/j.ejmech.2016.03.018] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 03/04/2016] [Accepted: 03/05/2016] [Indexed: 11/22/2022]
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32
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Keiko NA, Vchislo NV. α,β‐Unsaturated Aldehydes in the Synthesis of Five‐Membered Heterocyclic Compounds with One Heteroatom: Recent Advances from Developments in Metal‐ and Organocatalysis. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- N. A. Keiko
- A. E. Favorsky Irkutsk Institute of ChemistrySiberian Branch of the Russian Academy of Sciences 1 Favorsky Street 664033 Irkutsk Russian Federation
| | - N. V. Vchislo
- A. E. Favorsky Irkutsk Institute of ChemistrySiberian Branch of the Russian Academy of Sciences 1 Favorsky Street 664033 Irkutsk Russian Federation
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33
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Abstract
In the biofilm form, bacteria are more resistant to various antimicrobial treatments. Bacteria in a biofilm can also survive harsh conditions and withstand the host's immune system. Therefore, there is a need for new treatment options to treat biofilm-associated infections. Currently, research is focused on the development of antibiofilm agents that are nontoxic, as it is believed that such molecules will not lead to future drug resistance. In this review, we discuss recent discoveries of antibiofilm agents and different approaches to inhibit/disperse biofilms. These new antibiofilm agents, which contain moieties such as imidazole, phenols, indole, triazole, sulfide, furanone, bromopyrrole, peptides, etc. have the potential to disperse bacterial biofilms in vivo and could positively impact human medicine in the future.
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34
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Karak M, Barbosa LCA, Acosta JAM, Sarotti AM, Boukouvalas J. Thermodynamically driven, syn-selective vinylogous aldol reaction of tetronamides. Org Biomol Chem 2016; 14:4897-907. [DOI: 10.1039/c6ob00895j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A stereoselective vinylogous aldol reaction of N-monosubstituted tetronamides with aldehydes is described.
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Affiliation(s)
- Milandip Karak
- Department of Chemistry
- Instituto de Ciências Exatas
- Universidade Federal de Minas Gerais
- Belo Horizonte
- Brazil
| | - Luiz C. A. Barbosa
- Department of Chemistry
- Instituto de Ciências Exatas
- Universidade Federal de Minas Gerais
- Belo Horizonte
- Brazil
| | - Jaime A. M. Acosta
- Department of Chemistry
- Instituto de Ciências Exatas
- Universidade Federal de Minas Gerais
- Belo Horizonte
- Brazil
| | - Ariel M. Sarotti
- Instituto de Química Rosario (IQUIR)
- Universidad Nacional de Rosario–CONICET
- S2002LRK Rosario
- Argentina
| | - John Boukouvalas
- Département de Chimie
- Pavillon Alexandre-Vachon
- Université Laval
- Quebec City
- Canada
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35
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Pereira UA, Moreira TA, Barbosa LCA, Maltha CRA, Bomfim IS, Maranhão SS, Moraes MO, Pessoa C, Barros-Nepomuceno FWA. Rubrolide analogues and their derived lactams as potential anticancer agents. MEDCHEMCOMM 2016. [DOI: 10.1039/c5md00459d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Analogues of rubrolides were synthesized and shown to be cytotoxic to several cancer cell lines and not toxic to L929 normal cells. The cytotoxicity involved the induction of cell death by apoptosis.
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Affiliation(s)
- U. A. Pereira
- Department of Chemistry
- Federal University of Viçosa
- Viçosa
- Brazil
| | - T. A. Moreira
- Department of Chemistry
- Federal University of Viçosa
- Viçosa
- Brazil
| | - L. C. A. Barbosa
- Department of Chemistry
- Federal University of Viçosa
- Viçosa
- Brazil
- Department of Chemistry
| | - C. R. A. Maltha
- Department of Chemistry
- Federal University of Viçosa
- Viçosa
- Brazil
| | - I. S. Bomfim
- Center for Research and Drug Development
- Federal University of Ceará
- Fortaleza
- Brazil
| | - S. S. Maranhão
- Center for Research and Drug Development
- Federal University of Ceará
- Fortaleza
- Brazil
| | - M. O. Moraes
- Center for Research and Drug Development
- Federal University of Ceará
- Fortaleza
- Brazil
| | - C. Pessoa
- Center for Research and Drug Development
- Federal University of Ceará
- Fortaleza
- Brazil
- Oswaldo Cruz Foundation
| | - F. W. A. Barros-Nepomuceno
- Institute of Health Sciences
- University of International Integration of the Afro-Brazilian Lusophony
- Acarape
- Brazil
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Rodríguez-Hernández D, Demuner AJ, Barbosa LCA, Csuk R, Heller L. Hederagenin as a triterpene template for the development of new antitumor compounds. Eur J Med Chem 2015; 105:57-62. [PMID: 26476750 DOI: 10.1016/j.ejmech.2015.10.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 10/02/2015] [Accepted: 10/05/2015] [Indexed: 12/30/2022]
Abstract
In this study, a series of novel C-28 esters and amides derivatives of hederagenin (He) were designed and synthesized in attempt to develop potent antitumor agents. Their structures were confirmed by MS, IR, (1)H NMR and (13)C NMR spectroscopic analyses and their cytotoxic activities were screened in SRB assays using a panel of six human cancer cell lines. Although most of the compounds displayed moderate to high levels of cytotoxic activity they were all more potent than the natural product He. The most active compounds had either an ethylpyrimidinyl (27) or an ethylpyrrolidinyl (28) substituent, with EC50 in the range of 1.1-6.5 μM for six human cancer cell lines. Notably, this corresponds to an approximately 30-fold times greater potency than He.
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Affiliation(s)
- Diego Rodríguez-Hernández
- Department of Chemistry, Universidade Federal de Viçosa, Av. P. H. Rolfs, s/n, CEP 36570-900, Viçosa, MG, Brazil; Department of Chemistry, Universidade Federal de Minas Gerais, Av. Pres. Antônio Carlos 6627, Campus Pampulha, CEP 31270-901, Belo Horizonte, MG, Brazil
| | - Antonio J Demuner
- Department of Chemistry, Universidade Federal de Viçosa, Av. P. H. Rolfs, s/n, CEP 36570-900, Viçosa, MG, Brazil
| | - Luiz C A Barbosa
- Department of Chemistry, Universidade Federal de Viçosa, Av. P. H. Rolfs, s/n, CEP 36570-900, Viçosa, MG, Brazil; Department of Chemistry, Universidade Federal de Minas Gerais, Av. Pres. Antônio Carlos 6627, Campus Pampulha, CEP 31270-901, Belo Horizonte, MG, Brazil.
| | - René Csuk
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes-Str.2, D-06120, Halle (Saale), Germany.
| | - Lucie Heller
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes-Str.2, D-06120, Halle (Saale), Germany
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37
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Pereira UA, Barbosa LCA, Demuner AJ, Silva AA, Bertazzini M, Forlani G. Rubrolides as Model for the Development of New Lactones and Their Aza Analogs as Potential Photosynthesis Inhibitors. Chem Biodivers 2015; 12:987-1006. [DOI: 10.1002/cbdv.201400416] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Indexed: 11/12/2022]
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38
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Wang G, Mishra B, Lau K, Lushnikova T, Golla R, Wang X. Antimicrobial peptides in 2014. Pharmaceuticals (Basel) 2015; 8:123-50. [PMID: 25806720 PMCID: PMC4381204 DOI: 10.3390/ph8010123] [Citation(s) in RCA: 127] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 03/16/2015] [Accepted: 03/17/2015] [Indexed: 12/13/2022] Open
Abstract
This article highlights new members, novel mechanisms of action, new functions, and interesting applications of antimicrobial peptides reported in 2014. As of December 2014, over 100 new peptides were registered into the Antimicrobial Peptide Database, increasing the total number of entries to 2493. Unique antimicrobial peptides have been identified from marine bacteria, fungi, and plants. Environmental conditions clearly influence peptide activity or function. Human α-defensin HD-6 is only antimicrobial under reduced conditions. The pH-dependent oligomerization of human cathelicidin LL-37 is linked to double-stranded RNA delivery to endosomes, where the acidic pH triggers the dissociation of the peptide aggregate to release its cargo. Proline-rich peptides, previously known to bind to heat shock proteins, are shown to inhibit protein synthesis. A model antimicrobial peptide is demonstrated to have multiple hits on bacteria, including surface protein delocalization. While cell surface modification to decrease cationic peptide binding is a recognized resistance mechanism for pathogenic bacteria, it is also used as a survival strategy for commensal bacteria. The year 2014 also witnessed continued efforts in exploiting potential applications of antimicrobial peptides. We highlight 3D structure-based design of peptide antimicrobials and vaccines, surface coating, delivery systems, and microbial detection devices involving antimicrobial peptides. The 2014 results also support that combination therapy is preferred over monotherapy in treating biofilms.
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Affiliation(s)
- Guangshun Wang
- Department of Pathology and Microbiology, University of Nebraska Medical Center, 986495 Nebraska Medical Center, Omaha, NE 68198-6495, USA.
| | - Biswajit Mishra
- Department of Pathology and Microbiology, University of Nebraska Medical Center, 986495 Nebraska Medical Center, Omaha, NE 68198-6495, USA
| | - Kyle Lau
- Department of Pathology and Microbiology, University of Nebraska Medical Center, 986495 Nebraska Medical Center, Omaha, NE 68198-6495, USA
| | - Tamara Lushnikova
- Department of Pathology and Microbiology, University of Nebraska Medical Center, 986495 Nebraska Medical Center, Omaha, NE 68198-6495, USA
| | - Radha Golla
- Department of Pathology and Microbiology, University of Nebraska Medical Center, 986495 Nebraska Medical Center, Omaha, NE 68198-6495, USA
| | - Xiuqing Wang
- Department of Pathology and Microbiology, University of Nebraska Medical Center, 986495 Nebraska Medical Center, Omaha, NE 68198-6495, USA
- Institute of Clinical Laboratory, Ningxia Medical University, Yinchuan 750004, China
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39
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Pelkey ET, Pelkey SJ, Greger JG. De Novo Synthesis of 3-Pyrrolin-2-Ones. ADVANCES IN HETEROCYCLIC CHEMISTRY 2015. [DOI: 10.1016/bs.aihch.2015.04.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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