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Preventing Candida albicans biofilm formation using aromatic-rich piperazines. Bioorg Med Chem 2020; 28:115810. [PMID: 33091849 DOI: 10.1016/j.bmc.2020.115810] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 10/04/2020] [Accepted: 10/05/2020] [Indexed: 10/23/2022]
Abstract
The global increase in microbial resistance is an imminent threat to public health. Effective treatment of infectious diseases now requires new antimicrobial therapies. We report herein the discovery of aromatic-rich piperazines that inhibit biofilm formation by C. albicans. 22 piperazines, including 16 novel ones, were prepared efficiently using a combination of solid- and solution phase synthesis. The most potent compound prevents morphological switching under several hypha-inducing conditions and reduces C. albicans' ability to adhere to epithelial cells. These processes are essential to the development of Candida biofilms, which are associated with its increased resistance to immune defenses and antifungal agents.
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Abstract
The demand for the recovery of valuable metals and the need to understand the impact of heavy metals in the environment on human and aquatic life has led to the development of new methods for the extraction, recovery, and analysis of metal ions. With special emphasis on environmentally friendly approaches, efforts have been made to consider strategies that minimize the use of organic solvents, apply micromethodology, limit waste, reduce costs, are safe, and utilize benign or reusable materials. This review discusses recent developments in liquid- and solid-phase extraction techniques. Liquid-based methods include advances in the application of aqueous two- and three-phase systems, liquid membranes, and cloud point extraction. Recent progress in exploiting new sorbent materials for solid-phase extraction (SPE), solid-phase microextraction (SPME), and bulk extractions will also be discussed.
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Simon G, Bérubé C, Voyer N, Grenier D. Anti-biofilm and anti-adherence properties of novel cyclic dipeptides against oral pathogens. Bioorg Med Chem 2018; 27:2323-2331. [PMID: 30528685 DOI: 10.1016/j.bmc.2018.11.042] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 11/14/2018] [Accepted: 11/28/2018] [Indexed: 12/19/2022]
Abstract
Microorganisms embedded in a biofilm are significantly more resistant to antimicrobial agents and the defences of the human immune system, than their planktonic counterpart. Consequently, compounds that can inhibit biofilm formation are of great interest for novel therapeutics. In this study, a screening approach was used to identify novel cyclic dipeptides that have anti-biofilm activity against oral pathogens. Five new active compounds were identified that prevent biofilm formation by the cariogenic bacterium Streptococcus mutans and the pathogenic fungus Candida albicans. These compounds also inhibit the adherence of microorganisms to a hydroxylapatite surface. Further investigations were conducted on these compounds to establish the structure-activity relationship, and it was deduced that the common cleft pattern is required for these molecules to act effectively against biofilms.
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Affiliation(s)
- Gaëlle Simon
- Groupe de Recherche en Écologie Buccale, Faculté de Médecine Dentaire, Université Laval, 2420, rue de la Terrasse, Québec, QC G1V 0A6, Canada; Département de Chimie and PROTEO, Université Laval, Québec, QC G1V 0A6, Canada
| | - Christopher Bérubé
- Département de Chimie and PROTEO, Université Laval, Québec, QC G1V 0A6, Canada
| | - Normand Voyer
- Département de Chimie and PROTEO, Université Laval, Québec, QC G1V 0A6, Canada. normand.voyer.@chm.ulaval.ca
| | - Daniel Grenier
- Groupe de Recherche en Écologie Buccale, Faculté de Médecine Dentaire, Université Laval, 2420, rue de la Terrasse, Québec, QC G1V 0A6, Canada.
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Bérubé C, Borgia A, Voyer N. Total synthesis of pseudacyclins A–E by an on-resin head-to-side chain concomitant cyclization-cleavage reaction. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.10.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Abstract
The asymmetric unit of the title compound, C16H14N2O, contains three independent molecules differing primarily in the orientations of the benzyl groups. Each independent molecule forms inversion related dimersviaoffset π-stacking interactions. For two of these dimers, stacks are formed approximately along thea-axis direction by a combinations of C—H...N and C—H...π(ring) contacts, in addition to the offset π-stacking interactions. The third set of dimers are also stacked in the same direction but only by pairwise C—H...N hydrogen bonds.
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Bérubé C, Borgia A, Voyer N. A novel route towards cycle-tail peptides using oxime resin: teaching an old dog a new trick. Org Biomol Chem 2018; 16:9117-9123. [DOI: 10.1039/c8ob01868e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this paper, two anabaenopeptins cycle-tail peptides were synthesized via a novel acid-catalyzed head-to-side-chain concomitant cyclization/cleavage reaction on oxime resin.
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Affiliation(s)
- Christopher Bérubé
- Département de Chimie and PROTEO
- Université Laval
- Pavillon Alexandre-Vachon
- Faculté des sciences et de génie
- Québec
| | - Alexandre Borgia
- Département de Chimie and PROTEO
- Université Laval
- Pavillon Alexandre-Vachon
- Faculté des sciences et de génie
- Québec
| | - Normand Voyer
- Département de Chimie and PROTEO
- Université Laval
- Pavillon Alexandre-Vachon
- Faculté des sciences et de génie
- Québec
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Affiliation(s)
| | - Normand Voyer
- Département de chimie and PROTEO, Université Laval , Québec, Canada
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Ziganshin MA, Safiullina AS, Gerasimov AV, Ziganshina SA, Klimovitskii AE, Khayarov KR, Gorbatchuk VV. Thermally Induced Self-Assembly and Cyclization of l-Leucyl-l-Leucine in Solid State. J Phys Chem B 2017; 121:8603-8610. [PMID: 28820260 DOI: 10.1021/acs.jpcb.7b06759] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Thermal treatment of oligopeptides is one of the methods for synthesis of organic nanostructures. However, heating may lead not only to self-assembly of the initial molecules, but also to chemical reactions resulting in the formation of new unexpected nanostructures or change in the properties of the existing ones. In the present work, the reaction of cyclization of dipeptide l-leucyl-l-leucine in solid state under heating was studied. The change in morphology of dipeptide thin film and formation of nanostructures after heating was visualized using atomic force microscopy. This method also was used for demonstration of differences in self-assembly of linear and cyclic dipeptides. The chemical structure of reaction product was characterized by NMR spectrometry, FTIR spectroscopy and GC-MS analysis. Kinetic parameters of cyclization were estimated within the approaches of the nonisothermal kinetics ("model-free" kinetics and linear regression methods for detection of topochemical equation). The results of present work are useful for explanation the changes in the properties of nanostructures based on short-chain oligopeptides, notably leucyl-leucine, after thermal treatment, as well as for the synthesis of cyclic oligopeptides.
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Affiliation(s)
- Marat A Ziganshin
- A.M. Butlerov Institute of Chemistry, Kazan Federal University , Kremlevskaya ul. 18, Kazan, 420008 Russia
| | - Aisylu S Safiullina
- A.M. Butlerov Institute of Chemistry, Kazan Federal University , Kremlevskaya ul. 18, Kazan, 420008 Russia
| | - Alexander V Gerasimov
- A.M. Butlerov Institute of Chemistry, Kazan Federal University , Kremlevskaya ul. 18, Kazan, 420008 Russia
| | - Sufia A Ziganshina
- Kazan Zavoisky Physical-Technical Institute, Kazan Scientific Center, Russian Academy of Sciences , Sibirskii trakt 10/7, Kazan, 420029 Russia
| | - Alexander E Klimovitskii
- A.M. Butlerov Institute of Chemistry, Kazan Federal University , Kremlevskaya ul. 18, Kazan, 420008 Russia
| | - Khasan R Khayarov
- A.M. Butlerov Institute of Chemistry, Kazan Federal University , Kremlevskaya ul. 18, Kazan, 420008 Russia
| | - Valery V Gorbatchuk
- A.M. Butlerov Institute of Chemistry, Kazan Federal University , Kremlevskaya ul. 18, Kazan, 420008 Russia
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Lima RN, Porto AL. Facile synthesis of new quinoxalines from ethyl gallate by green chemistry protocol. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2016.12.062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Bérubé C, Barbeau X, Cardinal S, Boudreault PL, Bouchard C, Delcey N, Lagüe P, Voyer N. Interfacial supramolecular biomimetic epoxidation catalysed by cyclic dipeptides. Supramol Chem 2016. [DOI: 10.1080/10610278.2016.1236197] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | - Xavier Barbeau
- Département de Biochimie, Microbiologie et Bioinformatique and PROTÉO, Université Laval, Québec, Canada
| | | | | | - Corinne Bouchard
- Département de Chimie and PROTEO, Université Laval, Québec, Canada
| | - Nicolas Delcey
- Département de Chimie and PROTEO, Université Laval, Québec, Canada
| | - Patrick Lagüe
- Département de Biochimie, Microbiologie et Bioinformatique and PROTÉO, Université Laval, Québec, Canada
| | - Normand Voyer
- Département de Chimie and PROTEO, Université Laval, Québec, Canada
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Affiliation(s)
- Christopher Bérubé
- Département de chimie and PROTEO, Université Laval, Faculté des sciences et génie, Québec, Canada
| | - Normand Voyer
- Département de chimie and PROTEO, Université Laval, Faculté des sciences et génie, Québec, Canada
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