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Kumar A, Raghuvanshi TS, Pratap S, Kumar H, Prakash B. Nanofabrication of citronellal with chitosan biopolymer to boost its efficacy against aflatoxin B 1 and Aspergillus flavus mediated biodeterioration of active ingredient of Piper longum. Food Chem 2024; 449:139240. [PMID: 38599109 DOI: 10.1016/j.foodchem.2024.139240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Revised: 03/28/2024] [Accepted: 04/02/2024] [Indexed: 04/12/2024]
Abstract
The study reports the efficacy of nanofabricated citronellal inside the chitosan biopolymer (NeCn) against Aspergillus flavus growth, aflatoxin B1 (AFB1) production, and active ingredient biodeterioration (Piperine) in Piper longum L. The prepared NeCn was characterized by Scanning Electron Microscopy (SEM), Dynamic Light Scattering (DLS), and Fourier Transform Infrared Spectroscopy (FTIR). The results revealed that the NeCn exhibited distantly improved antifungal (1.25 μL/mL) and AFB1 inhibition (1.0 μL/mL) compared to free Cn. The perturbances in membrane function, mitochondrial membrane potential, antioxidant defense system, and regulatory genes (Ver-1 and Nor-1) of AFB1 biosynthesis were reported as probable modes of action of NeCn. The NeCn (1.25 μL/mL) effectively protects the P. longum from A. flavus (78.8%), AFB1 contamination (100%), and deterioration of Piperine (62.39%), thus demonstrating its potential as a promising novel antifungal agent for food preservation.
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Affiliation(s)
- Akshay Kumar
- Department of Botany, Institute of Science, Banaras Hindu University, Varanasi 221005, India; Department of Botany, Sri-Ganesh Rai P. G. College, Dobhi-Jaunpur, Uttar Pradesh, India
| | - Tanya Singh Raghuvanshi
- Department of Botany, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Surya Pratap
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi 221005, India; Department of Physics, Harish Chandra Postgraduate College, Varanasi, India
| | - Horesh Kumar
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Bhanu Prakash
- Department of Botany, Institute of Science, Banaras Hindu University, Varanasi 221005, India.
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Venancio AN, Silva MJ, Parreira LA, Júlio AA, Souza GR, Conceição Santos MF, Menini L. Citronellal: a natural aldehyde with important properties. Nat Prod Res 2024:1-14. [PMID: 38567669 DOI: 10.1080/14786419.2024.2332949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 03/11/2024] [Indexed: 04/04/2024]
Abstract
Among the several terpenes existing in nature, Citronellal, a monoterpene aldehyde, deserves to be highlighted for its biological properties that have been pointed out in numerous studies. This work aimed to conduct a literature review on its biological properties. Citronellal is a prominent compound in the essential oils of Cymbopogon genus plants. Apart from being employed as a fragrance ingredient in aromas, fragrances, and cosmetics, it is also used as an intermediate in synthesising (-)-menthol. Various studies have demonstrated Citronellal's potential as an antibacterial compound, particularly anti-Staphylococcus and Escherichia bacteria. Citronellal also has antifungal properties against several fungi, especially fungi of the genus Candida. The studies found showed that Citronellal also has insecticidal, acaricidal, antiparasitic, anaesthetic, antiviral, antioxidant, antinociceptive, cardioprotective, antihypertensive, anti-inflammatory, antidiabetic, and anticancer properties.
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Affiliation(s)
- Aldino N Venancio
- Department of Chemistry, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Marcio J Silva
- Department of Chemistry, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Luciana A Parreira
- Departamento de Química e Física, Universidade Federal do Espírito Santo, Alegre, ES, Brazil
| | - Armanda A Júlio
- Department of Agrochemistry, Instituto Federal do Espírito Santo, Alegre, ES, Brazil
| | - Gustavo R Souza
- Departamento de Química e Física, Universidade Federal do Espírito Santo, Alegre, ES, Brazil
| | | | - Luciano Menini
- Department of Agrochemistry, Instituto Federal do Espírito Santo, Alegre, ES, Brazil
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Beram FM, Ali SN, Mesbahian G, Pashizeh F, Keshvadi M, Mashayekhi F, Khodadadi B, Bashiri Z, Moeinzadeh A, Rezaei N, Namazifard S, Hossein-Khannazer N, Tavakkoli Yaraki M. 3D Printing of Alginate/Chitosan-Based Scaffold Empowered by Tyrosol-Loaded Niosome for Wound Healing Applications: In Vitro and In Vivo Performances. ACS APPLIED BIO MATERIALS 2024; 7:1449-1468. [PMID: 38442406 DOI: 10.1021/acsabm.3c00814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024]
Abstract
This study introduces a tyrosol-loaded niosome integrated into a chitosan-alginate scaffold (Nio-Tyro@CS-AL), employing advanced electrospinning and 3D printing techniques for wound healing applications. The niosomes, measuring 185.40 ± 6.40 nm with a polydispersity index of 0.168 ± 0.012, encapsulated tyrosol with an efficiency of 77.54 ± 1.25%. The scaffold's microsized porous structure (600-900 μm) enhances water absorption, promoting cell adhesion, migration, and proliferation. Mechanical property assessments revealed the scaffold's enhanced resilience, with niosomes increasing the compressive strength, modulus, and strain to failure, indicative of its suitability for wound healing. Controlled tyrosol release was demonstrated in vitro, essential for therapeutic efficacy. The scaffold exhibited significant antibacterial activity against Pseudomonas aeruginosa and Staphylococcus aureus, with substantial biofilm inhibition and downregulation of bacterial genes (ndvb and icab). A wound healing assay highlighted a notable increase in MMP-2 and MMP-9 mRNA expression and the wound closure area (69.35 ± 2.21%) in HFF cells treated with Nio-Tyro@CS-AL. In vivo studies in mice confirmed the scaffold's biocompatibility, showing no significant inflammatory response, hypertrophic scarring, or foreign body reaction. Histological evaluations revealed increased fibroblast and macrophage activity, enhanced re-epithelialization, and angiogenesis in wounds treated with Nio-Tyro@CS-AL, indicating effective tissue integration and repair. Overall, the Nio-Tyro@CS-AL scaffold presents a significant advancement in wound-healing materials, combining antibacterial properties with enhanced tissue regeneration, and holds promising potential for clinical applications in wound management.
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Affiliation(s)
| | - Saba Naeimaei Ali
- Medical Microbiology Research Center, Qazvin University of Medical Sciences, Qazvin 3419759811, Iran
| | - Ghazal Mesbahian
- School of Pharmacy, International Campus, Tehran University of Medical Sciences, Tehran 1416634793, Iran
| | - Fatemeh Pashizeh
- Department of Immunology, School of Medicine, Shahid Sadoughi University of Medical Science, Yazd 8916188635, Iran
| | | | - Farzaneh Mashayekhi
- Rasoul Akram Hospital, Iran University of Medical Sciences (IUMS), Tehran 14535, Iran
| | - Behnoosh Khodadadi
- Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University, Tehran 1993891176, Iran
| | - Zahra Bashiri
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran 14535, Iran
| | - Alaa Moeinzadeh
- Department of Tissue Engineering and Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran 14535, Iran
| | - Niloufar Rezaei
- Gastroenterology and Liver Diseases Research Center, Research, Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran 19839-63113, Iran
| | - Saina Namazifard
- Department of Mechanical and Aerospace Engineering, The University of Texas at Arlington, 500 West First Street, Arlington, Texas 76019, United States
| | - Nikoo Hossein-Khannazer
- Gastroenterology and Liver Diseases Research Center, Research, Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran 19839-63113, Iran
| | - Mohammad Tavakkoli Yaraki
- School of Natural Sciences, Faculty of Science and Engineering, Macquarie University, Sydney, New South Wales 2109, Australia
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Mohamad Hanafiah R, Abd Ghafar SA, Lim V, Musa SNA, Yakop F, Hairil Anuar AH. Green synthesis, characterisation and antibacterial activities of Strobilanthes crispus-mediated silver nanoparticles (SC-AGNPS) against selected bacteria. ARTIFICIAL CELLS, NANOMEDICINE, AND BIOTECHNOLOGY 2023; 51:549-559. [PMID: 37847252 DOI: 10.1080/21691401.2023.2268167] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 10/04/2023] [Indexed: 10/18/2023]
Abstract
This study aims to characterize and determine the antibacterial activities of synthesized Strobilanthes crispus-mediated AgNPs (SC-AgNPs) against Streptococcus mutans, Escherichia coli and Pseudomonas aeruginosa. S. crispus water extract acts as a reducing and capping agent in the synthesis of AgNPs. The synthesized AgNPs were characterized by using UV-Vis spectrophotometer, dynamic light scattering (DLS), field emission scanning electron microscope (FESEM), X-ray diffractometer (XRD) and Fourier transform infra-red (FTIR). FESEM images showed a rough surface with a spherical shape. The average size distribution of 75.25 nm with a polydispersity index (PDI) of 0.373. XRD analysis matched the face-centred cubic structure of silver. FTIR analysis revealed a shifted peak from 1404.99 to 1345.00 cm-1. MIC and MBC values of SC-AgNPs were 1.25 mg/mL and 2.5 mg/mL against E. coli, P. aeruginosa and S. mutans, respectively. Time-kill assay showed that SC-AgNPs significantly reduced bacterial growth as compared to non-treated bacteria. Morphologies of bacteria treated with SC-AgNPs were shrunk, lysed, irregular and smaller as compared to control. SC-AgNPs significantly disrupted the gene expression of eae A, gtf B and Pel A (p < 0.05). This study indicated that the synthesized SC-AgNPs were stable with enhanced antibacterial activities.
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Affiliation(s)
- Rohazila Mohamad Hanafiah
- Department of Basic Science, Faculty of Dentistry, Universiti Sains Islam Malaysia, Ampang Kuala Lumpur, Malaysia
| | - Siti Aisyah Abd Ghafar
- Department of Basic Science, Faculty of Dentistry, Universiti Sains Islam Malaysia, Ampang Kuala Lumpur, Malaysia
| | - Vuanghao Lim
- Integrative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Bertam, Kepala Batas, Penang, Malaysia
| | - Siti Nor Asma Musa
- Department of Basic Science, Faculty of Dentistry, Universiti Sains Islam Malaysia, Ampang Kuala Lumpur, Malaysia
- Faculty of Science and Engineering, School of Pharmacy, University Nottingham Malaysia, Semenyih, Selangor, Malaysia
| | - Fahmi Yakop
- Department of Basic Science, Faculty of Dentistry, Universiti Sains Islam Malaysia, Ampang Kuala Lumpur, Malaysia
| | - Arif Haikal Hairil Anuar
- Department of Basic Science, Faculty of Dentistry, Universiti Sains Islam Malaysia, Ampang Kuala Lumpur, Malaysia
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Bilosomes as Nanoplatform for Oral Delivery and Modulated In Vivo Antimicrobial Activity of Lycopene. Pharmaceuticals (Basel) 2022; 15:ph15091043. [PMID: 36145264 PMCID: PMC9505130 DOI: 10.3390/ph15091043] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 08/18/2022] [Accepted: 08/22/2022] [Indexed: 01/19/2023] Open
Abstract
Owing to the disseminating resistance among pathogenic bacteria, especially Klebsiella pneumoniae, there is a high need for alternate compounds with antibacterial activity. Herein, lycopene was isolated from Lycopersicon esculentum L. Molecular docking approach was employed to explore lycopene binding affinity to selected vital proteins of K. pneumoniae with the binding mechanisms being investigated. This proposed a promising antibacterial activity of lycopene. However, the pharmacological use of lycopene is hampered by its poor solubility and limited oral bioavailability. Accordingly, bilosomes were fabricated for oral lycopene delivery. The computed entrapment efficiency, mean vesicular size, and zeta potential values for the optimized formulation were 93.2 ± 0.6%, 485.8 ± 35.3 nm, and −38.3 ± 4, respectively. In vitro drug release studies revealed controlled lycopene release from constructed bilosomes, with the drug liberation being based on the Higuchi kinetics model. Transmission electron microscopic evaluation of bilosomes revealed spherical nanovesicles free from aggregates. Moreover, the in vitro and in vivo antibacterial activity of lycopene and its constructed formulations against multidrug-resistant K. pneumoniae isolates were explored. The optimized bilosomes exhibited the lowest minimum inhibitory concentrations ranging from 8 to 32 µg/mL. In addition, scanning electron microscopy revealed remarkable deformation and lysis of the bilosomes-treated bacterial cells. Regarding in vivo investigation, a lung infection model in mice was employed. The tested bilosomes reduced the inflammation and congestion in the treated mice’s lung tissues, resulting in normal-sized bronchioles and alveoli with very few congested vessels. In addition, it resulted in a significant reduction in pulmonary fibrosis. In conclusion, this study investigated the potential activity of the naturally isolated lycopene in controlling infections triggered by multidrug-resistant K. pneumoniae isolates. Furthermore, it introduced bilosomes as a promising biocompatible nanocarrier for modulation of oral lycopene delivery and in vivo antimicrobial activity.
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Anti-Biofilm and Antibacterial Activities of Cycas media R. Br Secondary Metabolites: In Silico, In Vitro, and In Vivo Approaches. Antibiotics (Basel) 2022; 11:antibiotics11080993. [PMID: 35892383 PMCID: PMC9394325 DOI: 10.3390/antibiotics11080993] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 07/18/2022] [Accepted: 07/22/2022] [Indexed: 11/17/2022] Open
Abstract
Enterococcus species possess many virulence factors that have an essential role in exacerbating the infections caused by them. The current study aimed to evaluate the effect of the secondary metabolites ginkgetin (GINK) and sotetsuflavone (SOTE), isolated from Cycas media R. Br dichloromethane fraction, on Enterococcus faecalis (E. faecalis) isolates for the first time. The antibacterial and antivirulence activities of the isolated compounds were investigated using docking studies and in vitro by determination of the minimum inhibitory concentrations (MICs). Additionally, flow cytometry and scanning electron microscope (SEM) were utilized to assess the effect of SOTE on the tested bacteria. Moreover, crystal violet assay and qRT-PCR were used to test the effect of SOTE on the biofilm-forming ability of E. faecalis isolates. In addition, a systemic infection model was utilized in vivo to investigate the antibacterial activity of SOTE. We found that both GINK and SOTE showed a good affinity for the five proteins enrolled in the virulence of E. faecalis, with SOTE being the highest, suggesting the possible mechanisms for the antivirulence activity of both ligands. In addition, SOTE exhibited a higher antibacterial activity than GINK, as the values of the MICs of SOTE were lower than those of GINK. Thus, we performed the in vitro and in vivo assays on SOTE. However, they did not exhibit any significant variations (p > 0.05) in the membrane depolarization of E. faecalis isolates. Moreover, as evaluated by SEM, SOTE caused distortion and deformation in the treated cells. Regarding its impact on the biofilm formation, it inhibited the biofilm-forming ability of the tested isolates, as determined by crystal violet assay and qRT-PCR. The in vivo experiment revealed that SOTE resulted in a reduction of the inflammation of the liver and spleen with an increase in the survival rate. SOTE also improved the liver-function tests and decreased tumor necrosis factor-alpha using immunostaining and the inflammation markers, interleukins (IL-1β and IL-6), using ELISA. Thus, we can conclude that SOTE could be a promising compound that should be investigated in future preclinical and clinical studies.
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Dahibhate NL, Shukla SK, Kumar K. A Cyclic Disulfide Diastereomer From Bioactive Fraction of Bruguiera gymnorhiza Shows Anti- Pseudomonas aeruginosa Activity. Front Pharmacol 2022; 13:890790. [PMID: 35721160 PMCID: PMC9201687 DOI: 10.3389/fphar.2022.890790] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Accepted: 04/14/2022] [Indexed: 01/08/2023] Open
Abstract
Pseudomonas aeruginosa is an opportunistic pathogen that commonly causes hospital-acquired infection and is of great concern in immunocompromised patients. The quorum sensing (QS) mechanism of P. aeruginosa is well studied and known to be responsible for pathogenicity and virulence. The QS inhibitor derived from the natural product can be an important therapeutic agent for pathogen control. The present study reports the role of Bruguiera gymnorhiza purified fraction (BG138) in inhibiting virulence factor production, biofilm formation, quorum sensing molecules, and expression of QS-related genes of P. aeruginosa. Structural characterization of BG138 by high resolution mass spectrometry, Fourier transform infrared spectroscopy, 1D (1H and 13C NMR) and 2D NMR reveals that the fraction is a mixture of already known cyclic disulfide diastereomer, namely, brugierol and isobrugierol. The minimum inhibitory concentration (MIC) of BG138 against P. aeruginosa was 32 μg/ml. Biofilm formation was significantly reduced at sub-MIC concentrations of BG138. Scanning electron microscopy analysis reports the concentration-dependent biofilm inhibition and morphological changes of P. aeruginosa. Flow cytometry–based cell viability assay showed that P. aeruginosa cells exhibit increased propidium iodide uptake on treatment with 32 and 64 μg/ml of BG138. At sub-MIC concentrations, BG138 exhibited significant inhibition of virulence factors and reduced swimming and swarming motility of P. aeruginosa. Furthermore, the effect of BG138 on the expression of QS-related genes was investigated by qRT-PCR. Taken together, our study reports the isolation and structural characterization of bioactive fraction BG138 from B. gymnorhiza and its anti-biofilm, anti-virulence, anti-quorum sensing, and cell-damaging activities against P. aeruginosa.
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Affiliation(s)
- Nilesh Lakshman Dahibhate
- Department of Biological Sciences, Birla Institute of Technology & Science Pilani, K. K. Birla Goa Campus, Goa, India
| | - Sanjeev K Shukla
- Sophisticated Analytical Instrument Facility, CSIR-Central Drug Research Institute, Lucknow, India
| | - Kundan Kumar
- Department of Biological Sciences, Birla Institute of Technology & Science Pilani, K. K. Birla Goa Campus, Goa, India
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Olaifa K, Ajunwa O, Marsili E. Electroanalytic evaluation of antagonistic effect of azole fungicides on Acinetobacter baumannii biofilms. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.139837] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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Heliopoulos NS, Kythreoti G, Lyra KM, Panagiotaki KN, Papavasiliou A, Sakellis E, Papageorgiou S, Kouloumpis A, Gournis D, Katsaros FK, Stamatakis K, Sideratou Z. Cytotoxicity Effects of Water-Soluble Multi-Walled Carbon Nanotubes Decorated with Quaternized Hyperbranched Poly(ethyleneimine) Derivatives on Autotrophic and Heterotrophic Gram-Negative Bacteria. Pharmaceuticals (Basel) 2020; 13:E293. [PMID: 33036144 PMCID: PMC7601344 DOI: 10.3390/ph13100293] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 09/30/2020] [Accepted: 10/01/2020] [Indexed: 02/07/2023] Open
Abstract
Oxidized multi-walled carbon nanotubes (oxCNTs) were functionalized by a simple non-covalent modification procedure using quaternized hyperbranched poly(ethyleneimine) derivatives (QPEIs), with various quaternization degrees. Structural characterization of these hybrids using a variety of techniques, revealed the successful and homogenous anchoring of QPEIs on the oxCNTs' surface. Moreover, these hybrids efficiently dispersed in aqueous media, forming dispersions with excellent aqueous stability for over 12 months. Their cytotoxicity effect was investigated on two types of gram(-) bacteria, an autotrophic (cyanobacterium Synechococcus sp. PCC 7942) and a heterotrophic (bacterium Escherichia coli). An enhanced, dose-dependent antibacterial and anti-cyanobacterial activity against both tested organisms was observed, increasing with the quaternization degree. Remarkably, in the photosynthetic bacteria it was shown that the hybrid materials affect their photosynthetic apparatus by selective inhibition of the Photosystem-I electron transport activity. Cytotoxicity studies on a human prostate carcinoma DU145 cell line and 3T3 mouse fibroblasts revealed that all hybrids exhibit high cytocompatibility in the concentration range, in which they also exhibit both high antibacterial and anti-cyanobacterial activity. Thus, QPEI-functionalized oxCNTs can be very attractive candidates as antibacterial and anti-cyanobacterial agents that can be used for potential applications in the disinfection industry, as well as for the control of harmful cyanobacterial blooms.
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Affiliation(s)
- Nikolaos S. Heliopoulos
- Institute of Nanoscience and Nanotechnology, National Centre of Scientific Research ‘‘Demokritos”, 15310 Aghia Paraskevi, Greece; (N.S.H.); (G.K.); (K.M.L.); (K.N.P.); (A.P.); (E.S.); (S.P.); (F.K.K.)
- Department of Industrial Design & Production Engineering, University of West Attica, 12241 Egaleo, Attiki, Greece
| | - Georgia Kythreoti
- Institute of Nanoscience and Nanotechnology, National Centre of Scientific Research ‘‘Demokritos”, 15310 Aghia Paraskevi, Greece; (N.S.H.); (G.K.); (K.M.L.); (K.N.P.); (A.P.); (E.S.); (S.P.); (F.K.K.)
- Institute of Biosciences and Applications, National Centre of Scientific Research ‘‘Demokritos”, 15310 Aghia Paraskevi, Greece;
| | - Kyriaki Marina Lyra
- Institute of Nanoscience and Nanotechnology, National Centre of Scientific Research ‘‘Demokritos”, 15310 Aghia Paraskevi, Greece; (N.S.H.); (G.K.); (K.M.L.); (K.N.P.); (A.P.); (E.S.); (S.P.); (F.K.K.)
| | - Katerina N. Panagiotaki
- Institute of Nanoscience and Nanotechnology, National Centre of Scientific Research ‘‘Demokritos”, 15310 Aghia Paraskevi, Greece; (N.S.H.); (G.K.); (K.M.L.); (K.N.P.); (A.P.); (E.S.); (S.P.); (F.K.K.)
| | - Aggeliki Papavasiliou
- Institute of Nanoscience and Nanotechnology, National Centre of Scientific Research ‘‘Demokritos”, 15310 Aghia Paraskevi, Greece; (N.S.H.); (G.K.); (K.M.L.); (K.N.P.); (A.P.); (E.S.); (S.P.); (F.K.K.)
| | - Elias Sakellis
- Institute of Nanoscience and Nanotechnology, National Centre of Scientific Research ‘‘Demokritos”, 15310 Aghia Paraskevi, Greece; (N.S.H.); (G.K.); (K.M.L.); (K.N.P.); (A.P.); (E.S.); (S.P.); (F.K.K.)
| | - Sergios Papageorgiou
- Institute of Nanoscience and Nanotechnology, National Centre of Scientific Research ‘‘Demokritos”, 15310 Aghia Paraskevi, Greece; (N.S.H.); (G.K.); (K.M.L.); (K.N.P.); (A.P.); (E.S.); (S.P.); (F.K.K.)
| | - Antonios Kouloumpis
- Department of Material Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (A.K.); (D.G.)
| | - Dimitrios Gournis
- Department of Material Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (A.K.); (D.G.)
| | - Fotios K. Katsaros
- Institute of Nanoscience and Nanotechnology, National Centre of Scientific Research ‘‘Demokritos”, 15310 Aghia Paraskevi, Greece; (N.S.H.); (G.K.); (K.M.L.); (K.N.P.); (A.P.); (E.S.); (S.P.); (F.K.K.)
| | - Kostas Stamatakis
- Institute of Biosciences and Applications, National Centre of Scientific Research ‘‘Demokritos”, 15310 Aghia Paraskevi, Greece;
| | - Zili Sideratou
- Institute of Nanoscience and Nanotechnology, National Centre of Scientific Research ‘‘Demokritos”, 15310 Aghia Paraskevi, Greece; (N.S.H.); (G.K.); (K.M.L.); (K.N.P.); (A.P.); (E.S.); (S.P.); (F.K.K.)
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Ghazanfari N, Mortazavi SA, Yazdi FT, Mohammadi M. Microwave-assisted hydrodistillation extraction of essential oil from coriander seeds and evaluation of their composition, antioxidant and antimicrobial activity. Heliyon 2020; 6:e04893. [PMID: 32984601 PMCID: PMC7498746 DOI: 10.1016/j.heliyon.2020.e04893] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 04/14/2020] [Accepted: 09/07/2020] [Indexed: 01/18/2023] Open
Abstract
Coriander seeds essential oil is used in food preparation, perfume, cosmetics and pharmaceuticals. In this study, extraction of essential oil from coriander seeds was done by hydrodistillation (HD) and microwave assisted hydrodistillation (MAHD) methods. Chemical composition, total phenol contents, antimicrobial and antioxidant properties of essential oils were measured and the results were compared between HD and MAHD methods. Scanning electron microscopy (SEM) results showed that the essential oils had inhibitory effect on the bacterial membrane and cell wall. Results showed that total phenol contents and antioxidant activity increased under heat and microwave conditions. Coriander seeds essential oil had a very strong effect on Candida albicans. Gram-positive bacteria were more sensitive to the essential oil of coriander seeds than Gram-negative bacteria. The essential oil extracted by MAHD showed better antimicrobial activity, higher phenols yield and antioxidant activity. According to the results of GC-MS, linalool was the most common constituent of both essential oils.
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Affiliation(s)
- Negin Ghazanfari
- Food Science and Technology, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Seyed Ali Mortazavi
- Department of Food Science and Technology, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
- Corresponding author.
| | - Farideh Tabatabaei Yazdi
- Department of Food Science and Technology, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Morteza Mohammadi
- Department of Food Processing, Research Institute of Food Science and Technology (RIFST), Mashhad, Iran
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11
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Structural deformation in pathogenic bacteria cells caused by marine fungal metabolites: An in vitro investigation. Microb Pathog 2020; 146:104248. [PMID: 32407860 DOI: 10.1016/j.micpath.2020.104248] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 04/16/2020] [Accepted: 05/04/2020] [Indexed: 11/24/2022]
Abstract
Over the past 50 years, fungal natural products have revolutionized medicine, yielding drugs which have enormous therapeutic potential. The aim of this study was to investigate the probable effect of marine fungal natural products on various skin pathogens. Initially, seventy natural extracts obtained from 35 different marine fungal strains were analysed by the agar well diffusion and broth micro dilution assay for their antibacterial action against six human skin pathogens. The minimum inhibitory effects of all active fungal methanolic extracts on targeted pathogens were observed between 90 and 99% at the concentration of 1 mg/mL. The highest activity was recorded by fungal strains belonging to genera Penicillium, Emericellopsis and Simplicillium. Thereafter, possible effects on target bacterial cells were studied by scanning electron microscopy which show significant destruction and structural deformation in the bacterial cell wall. The results of the present study provided good evidence that the studied marine fungi can be a potential source of natural antibacterial agents against skin bacterial pathogens.
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Elcocks ER, Spencer-Phillips PTN, Adukwu EC. Rapid bactericidal effect of cinnamon bark essential oil against Pseudomonas aeruginosa. J Appl Microbiol 2019; 128:1025-1037. [PMID: 31793161 DOI: 10.1111/jam.14538] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 11/27/2019] [Accepted: 11/28/2019] [Indexed: 12/15/2022]
Abstract
AIMS This study aimed to identify the most effective antimicrobial agent from a selection of essential oils (EO) and investigate its bactericidal properties against Pseudomonas aeruginosa. METHODS AND RESULTS The disc diffusion assay and minimal inhibitory/bactericidal concentration tests were used to identify antimicrobial potential. Several oils exhibited antimicrobial effects at concentrations as low as 0·03% (v/v). Significantly, cinnamon (Cinnamomum zeylanicum) bark EO exhibited a broad-spectrum activity against Gram-negative and Gram-positive bacteria and showed bacteriostatic and bactericidal effects against P. aeruginosa PAO1 at 0·125% (v/v) and all other tested organisms, including known multidrug resistant species. Time-kill assays and metabolic activity tests showed cinnamon oil to exhibit rapid killing, with bactericidal activity observed in ≤6 min at ≥0·5% (v/v). Furthermore, scanning electron microscopy and a membrane permeability assay indicated damage to membrane integrity, loss of turgor and cell collapse. CONCLUSION Cinnamon bark EO is a broad-spectrum antimicrobial agent capable of rapid killing at low concentrations. SIGNIFICANCE AND IMPACT OF THE STUDY This study provides a sound basis for further investigation of the potential of cinnamon bark EO as an alternative to conventional antimicrobial products due to its fast-acting bactericidal properties at low concentrations.
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Affiliation(s)
- E R Elcocks
- Department of Health and Applied Sciences, Centre for Research in Biosciences, University of the West of England, Bristol, UK
| | - P T N Spencer-Phillips
- Department of Health and Applied Sciences, Centre for Research in Biosciences, University of the West of England, Bristol, UK
| | - E C Adukwu
- Department of Health and Applied Sciences, Centre for Research in Biosciences, University of the West of England, Bristol, UK
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13
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Padilha da Silva W, Coswig Goldbeck J, Silveira Volcan Maia D, Mello El Halal SL, Colussi R, da Rosa Zavareze E, Guerra Dias ÁR, Guimarães Jacob R, Lenardão EJ. Antimicrobial activity of 3-(p-chlorophenyl)thio citronellal against planktonic and biofilm Staphylococcus aureus cells and its application in biodegradable films. Food Packag Shelf Life 2019. [DOI: 10.1016/j.fpsl.2019.100375] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Lauer Cruz K, de Souza da Motta A. Characterization of biofilm production by Pseudomonas fluorescens isolated from refrigerated raw buffalo milk. Journal of Food Science and Technology 2019; 56:4595-4604. [PMID: 31686691 DOI: 10.1007/s13197-019-03924-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 06/28/2019] [Accepted: 07/03/2019] [Indexed: 12/13/2022]
Abstract
Pseudomonas fluorescens can often be isolated from refrigerated raw milk. Two strains of P. fluorescens PL5.4 and PL7.1, isolated from raw buffalo milk, were evaluated for their proteolytic capacity, exopolysaccharide production and biofilm production. Proteolytic activity was observed in both strains. The P. fluorescens PL5.4 strain presented fluorescence in the presence of calcofluor, indicating exopolysaccharide production. Both strains were able to produce biofilm at 7 °C for 72 h. For the biofilm production test on stainless steel, adherent cell counts of up to 7.1, 7.3 and 8.8 log CFU/cm2 at 7, 23 and 30 °C were obtained. Through scanning electron microscopy, it was possible to observe the biofilm produced by the P. fluorescens PL5.4 strain. Proper cleaning and disinfection practices in order are important to reduce bacterial contamination and extend the useful life of raw material and its derivatives.
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Affiliation(s)
- Karine Lauer Cruz
- Instituto de Ciências Básicas da Saúde, Microbiology Department, Immunology and Parasitology, Federal University of Rio Grande do Sul, Rua Sarmento Leite 500, Sala 216, Porto Alegre, 90050-170 Brazil
| | - Amanda de Souza da Motta
- Instituto de Ciências Básicas da Saúde, Microbiology Department, Immunology and Parasitology, Federal University of Rio Grande do Sul, Rua Sarmento Leite 500, Sala 216, Porto Alegre, 90050-170 Brazil
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15
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Kansandee W, Moonmangmee D, Moonmangmee S, Itsaranuwat P. Characterization and Bifidobacterium sp. growth stimulation of exopolysaccharide produced by Enterococcus faecalis EJRM152 isolated from human breast milk. Carbohydr Polym 2019; 206:102-109. [DOI: 10.1016/j.carbpol.2018.10.117] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 10/30/2018] [Accepted: 10/30/2018] [Indexed: 01/10/2023]
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16
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Vitanza L, Maccelli A, Marazzato M, Scazzocchio F, Comanducci A, Fornarini S, Crestoni ME, Filippi A, Fraschetti C, Rinaldi F, Aleandri M, Goldoni P, Conte MP, Ammendolia MG, Longhi C. Satureja montana L. essential oil and its antimicrobial activity alone or in combination with gentamicin. Microb Pathog 2018; 126:323-331. [PMID: 30458252 DOI: 10.1016/j.micpath.2018.11.025] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 11/13/2018] [Accepted: 11/16/2018] [Indexed: 12/21/2022]
Abstract
Many essential oils (EOs) are screened as potential sources of antimicrobial compounds. EOs from the genus Satureja have recognized biological properties, including analgesic, anti-inflammatory, immunomodulatory, anticancer, and antimicrobial activity. This study aimed to obtain a metabolite profile of commercial essential oil of S. montana L. (SEO) and to evaluate its antimicrobial properties, both alone and combined with gentamicin towards Gram-negative and Gram-positive bacterial strains. Untargeted analyses based on direct infusion Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR MS) and on GC-MS have provided a high metabolome coverage, allowing to identify carvacrol, cymene and thymol as the major components of commercial SEO. SEO exerted an antimicrobial activity and induced a synergistic interaction with gentamicin against both reference and clinical bacterial strains. A significant reduction of Escherichia coli, Staphylococcus aureus and Listeria monocytogenes biofilm formation was induced by SEO. As a result of SEO treatment, clear morphological bacterial alterations were visualized by scanning electron microscopy: L. monocytogenes and S. aureus showed malformed cell surface or broken cells with pores formation, whereas E. coli displayed collapsed cell surface. These results encourage further studies about bactericidal and antibiotic synergistic effect of SEO for combined therapy in clinical setting as well as in agricultural systems.
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Affiliation(s)
- Luca Vitanza
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Alessandro Maccelli
- Department of Drug Chemistry and Technologies, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Massimiliano Marazzato
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Francesca Scazzocchio
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Antonella Comanducci
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Simonetta Fornarini
- Department of Drug Chemistry and Technologies, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Maria Elisa Crestoni
- Department of Drug Chemistry and Technologies, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Antonello Filippi
- Department of Drug Chemistry and Technologies, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Caterina Fraschetti
- Department of Drug Chemistry and Technologies, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Federica Rinaldi
- Center for Life Nano Science@Sapienza, Fondazione Istituto Italiano di Tecnologia, Viale Regina Elena 291 00161, Rome, Italy
| | - Marta Aleandri
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Paola Goldoni
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Maria Pia Conte
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Maria Grazia Ammendolia
- National Center of Innovative Technologies in Public Health, National Institute of Health, Viale Regina Elena, 299 - 00161, Rome, Italy.
| | - Catia Longhi
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy.
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17
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Harnvoravongchai P, Chankhamhaengdecha S, Ounjai P, Singhakaew S, Boonthaworn K, Janvilisri T. Antimicrobial Effect of Asiatic Acid Against Clostridium difficile Is Associated With Disruption of Membrane Permeability. Front Microbiol 2018; 9:2125. [PMID: 30245677 PMCID: PMC6137100 DOI: 10.3389/fmicb.2018.02125] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 08/20/2018] [Indexed: 12/17/2022] Open
Abstract
Antibiotic resistance is a major concern in Clostridium difficile, the causative agent of antibiotic-associated diarrhea. Reduced susceptibility to first- and second-line agents is widespread, therefore various attempts have been made to seek alternative preventive and therapeutic strategies against this pathogen. In this work, the antimicrobial properties of asiatic acid were evaluated against C. difficile. Asiatic acid displayed substantial inhibitory effects on 19 C. difficile isolates collected from different sources with minimal inhibitory concentrations ranging from 10 to 20 μg/ml. Time kill analysis and minimal bactericidal concentration revealed potential bactericidal activity of this compound. Asiatic acid induced membrane damages and alterations in morphological ultrastructure in C. difficile, thereby causing the leakage of intracellular substances. Moreover, asiatic acid also displayed an inhibitory effect on cell motility, but did not interfere with biofilm formation and spore germination. Analysis of drug combination showed no synergistic effect between asiatic acid and vancomycin/metronidazole. Altogether, asiatic acid exhibited strong antimicrobial activity against vegetative cells and could serve as an alternative resource for tackling C. difficile.
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Affiliation(s)
| | | | - Puey Ounjai
- Department of Biology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Sombat Singhakaew
- Department of Biology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Kanpong Boonthaworn
- Department of Biology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Tavan Janvilisri
- Department of Biochemistry, Faculty of Science, Mahidol University, Bangkok, Thailand
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18
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Ngome MT, Alves JGLF, de Oliveira ACF, da Silva Machado P, Mondragón-Bernal OL, Piccoli RH. Linalool, citral, eugenol and thymol: control of planktonic and sessile cells of Shigella flexneri. AMB Express 2018; 8:105. [PMID: 29943167 PMCID: PMC6020087 DOI: 10.1186/s13568-018-0634-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 06/14/2018] [Indexed: 11/26/2022] Open
Abstract
The antimicrobial activity of linalool, citral, eugenol and thymol was determined in growth studies of both planktonic (PC) and biofilm cells (BC) Shigella flexneri. These components were evaluated either in isolation or in combinations using a sequential experimental strategy with Plackett & Burman and central composite rotational designs totaling 47 treatments. The minimum inhibitory concentration for PC was 0.125% (v v−1) for linalool and 0.5% (v v−1) for citral, eugenol and thymol. The biofilm minimum bactericidal concentration was 3 and 1% (v v−1) for linalool and citral, respectively, and 2% (v v−1) for eugenol and thymol. In the mixtures, the minimum concentrations in the efficient assays for PC growth inhibition were 0.0003, 0.0443 and 0.0443% (v v−1), for linalool, citral and thymol, respectively. In the BC, only two assays with concentrations of 0.0558, 0.0558 and 0.319% (v v−1) and 0.035, 0.035 and 0.3999% (v v−1) for linalool, citral and thymol, respectively, inhibited Shigella growth. Synergism was observed among the components, where PC and BC growth inhibition occurred at lower concentrations than those noted individually. The bactericidal effect of the components in microplate was different from the observed in stain steel coupons. Therefore, the obtained model can describe and predict the PC count of S. flexneri in medium with the tested compounds and they could be an alternative for the use in microbiological control in food industry.
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19
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Yadav AK, Sirohi P, Saraswat S, Rani M, Singh MP, Srivastava S, Singh NK. Inhibitory Mechanism on Combination of Phytic Acid with Methanolic Seed Extract of Syzygium cumini and Sodium Chloride over Bacillus subtilis. Curr Microbiol 2018; 75:849-856. [DOI: 10.1007/s00284-018-1457-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Accepted: 02/15/2018] [Indexed: 01/25/2023]
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20
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Lopes EF, Dalberto BT, Perin G, Alves D, Barcellos T, Lenardão EJ. Synthesis of Terminal Ethynyl Aryl Selenides and Sulfides Based on the Retro-Favorskii Reaction of Hydroxypropargyl Precursors. Chemistry 2017; 23:13760-13765. [PMID: 28763120 DOI: 10.1002/chem.201702493] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Indexed: 11/12/2022]
Abstract
The retro-Favorskii reaction is an excellent way to achieve terminal alkynes. Methodologies that connect the synthesis of terminal alkynes and organochalcogen motifs are important for the construction of novel compounds. Fourteen new terminal alkynes containing either Csp -S or Csp -Se bonds were selectively prepared through the retro-Favorskii reaction from the respective carbinol precursors. It was discovered that terminal chalcogen alkynes were stable for weeks if stored as a solution in hexanes.
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Affiliation(s)
- Eric F Lopes
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas-UFPel, P.O. Box 354, CEP, 96010-900, Pelotas, RS-, Brazil
| | - Bianca T Dalberto
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas-UFPel, P.O. Box 354, CEP, 96010-900, Pelotas, RS-, Brazil
| | - Gelson Perin
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas-UFPel, P.O. Box 354, CEP, 96010-900, Pelotas, RS-, Brazil
| | - Diego Alves
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas-UFPel, P.O. Box 354, CEP, 96010-900, Pelotas, RS-, Brazil
| | - Thiago Barcellos
- Laboratory of Biotechnology of Natural and Synthetic Products, Universidade de Caxias do Sul-UCS, Caxias do Sul, RS, Brazil
| | - Eder J Lenardão
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas-UFPel, P.O. Box 354, CEP, 96010-900, Pelotas, RS-, Brazil
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21
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Ferraz MC, Mano RA, Oliveira DH, Maia DSV, Silva WP, Savegnago L, Lenardão EJ, Jacob RG. Synthesis, Antimicrobial, and Antioxidant Activities of Chalcogen-Containing Nitrone Derivatives from (R)-citronellal. MEDICINES 2017; 4:medicines4020039. [PMID: 28930254 PMCID: PMC5590075 DOI: 10.3390/medicines4020039] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 06/01/2017] [Accepted: 06/05/2017] [Indexed: 01/02/2023]
Abstract
Background: The main constituents of Cymbopogonnardus (L) Rendle and C. citratus (DC) Stapfessential oils are (R)-citronellal and citral, respectively. Organochalcogen compounds can boost the biological activities of natural products. Methods: Several chalcogen-containing nitrones derived from (R)-citronellal and citral were prepared and evaluated for their antimicrobial and antioxidant activities. The antimicrobial activity was evaluated by the disc diffusion test and the antioxidant properties were evaluated in vitro by DPPH (1,1-diphenyl-2-picryl-hydrazyl), ABTS (2,2′-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid), and FRAP (ferric ion reducing antioxidant power) assays. Results: In the antimicrobial assay, (E)-N,3,7-trimethyl-3-(phenylthio)oct-6-en-1-imine oxide 5c exhibited halos between 21.5 mm (Escherichia coli O157:H7) and 26.0 mm (Listeria monocytogenes), while (E)-N,3,7-trimethyloct-6-en-1-imine oxide 5d presented halos between 22.5 mm (E. coli O157:H7) and 31.0 mm (L. monocytogenes). (E)-N,3,7-Trimethyl-2-(phenylthio)oct-6-en-1-imine oxide 5a showed the lowest minimal inhibitory concentration (MIC) value against Bacillus cereus (0.48 mM), and 5c was the most potent bactericide, with a minimal bactericidal concentration (MBC) of 0.52 mM for E. coli O157:H7. In the antioxidant assays, 5c, 5d, and 10 ((E)-3,7-dimethyl-2-(phenylselanyl)oct-6-enal oxime) were the most actives in the DPPH, ABTS, and FRAP assays, respectively. Conclusions: The presence of a phenylthio group in the nitrone increases its antimicrobial activity against Gram-positive and Gram-negative foodborne pathogens in the disk diffusion test and the antioxidant activity in vitro.
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Affiliation(s)
- Mariana C Ferraz
- Laboratório de Síntese Orgânica Limpa, LASOL, Universidade Federal de Pelotas, UFPel, Pelotas, RS 96010-900, Brazil.
| | - Renata A Mano
- Laboratório de Síntese Orgânica Limpa, LASOL, Universidade Federal de Pelotas, UFPel, Pelotas, RS 96010-900, Brazil.
| | - Daniela H Oliveira
- Laboratório de Síntese Orgânica Limpa, LASOL, Universidade Federal de Pelotas, UFPel, Pelotas, RS 96010-900, Brazil.
| | - Darla S V Maia
- Faculdade de Agronomia Eliseu Maciel, DCTA, Universidade Federal de Pelotas, UFPel, Pelotas, RS 96010-900, Brazil.
| | - Wladimir P Silva
- Faculdade de Agronomia Eliseu Maciel, DCTA, Universidade Federal de Pelotas, UFPel, Pelotas, RS 96010-900, Brazil.
| | - Lucielli Savegnago
- Centro de Desenvolvimento Tecnológico, Unidade Biotecnologia, Universidade Federal de Pelotas, UFPel, Pelotas, RS 96010-900, Brazil.
| | - Eder J Lenardão
- Laboratório de Síntese Orgânica Limpa, LASOL, Universidade Federal de Pelotas, UFPel, Pelotas, RS 96010-900, Brazil.
| | - Raquel G Jacob
- Laboratório de Síntese Orgânica Limpa, LASOL, Universidade Federal de Pelotas, UFPel, Pelotas, RS 96010-900, Brazil.
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22
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Antibacterial effect of chalcogenoesters on planktonic cells and biofilms of Streptococcus mutans and Streptococcus parasanguinis. Med Chem Res 2017. [DOI: 10.1007/s00044-017-1877-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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23
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Leal JG, Sauer AC, Mayer JCP, Stefanello ST, Gonçalves DF, Soares FAA, Iglesias BA, Back DF, Rodrigues OED, Dornelles L. Synthesis and electrochemical and antioxidant properties of chalcogenocyanate oxadiazole and 5-heteroarylchalcogenomethyl-1H-tetrazole derivatives. NEW J CHEM 2017. [DOI: 10.1039/c7nj00920h] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article presents the 5-heteroarylchalcogenomethyl-1H-tetrazoles, which were synthesized in high yields.
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Affiliation(s)
- Julliano G. Leal
- LabSelen-NanoBio – Departamento de Química
- CCNE
- UFSM
- Santa Maria
- Brazil
| | - André C. Sauer
- LabSelen-NanoBio – Departamento de Química
- CCNE
- UFSM
- Santa Maria
- Brazil
| | - João C. P. Mayer
- LabSelen-NanoBio – Departamento de Química
- CCNE
- UFSM
- Santa Maria
- Brazil
| | | | | | - Felix A. A. Soares
- Departamento de Bioquímica e Biologia Molecular
- CCNE
- UFSM
- Santa Maria
- Brazil
| | | | - Davi F. Back
- Laboratório de Materiais Inorgânicos
- Departamento de Química
- CCNE
- UFSM
- Santa Maria
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24
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Synthesis and antioxidant properties of organosulfur and organoselenium compounds derived from 5-substituted-1,3,4-oxadiazole/thiadiazole-2-thiols. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2016.11.106] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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25
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Perin G, Silveira MB, Barcellos AM, Jacob RG, Alves D. Polyethylene glycol-400/H3PO2: an eco-friendly reductive system for the synthesis of selanylesters. Org Chem Front 2015. [DOI: 10.1039/c5qo00256g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
An alternative green method was described for the synthesis of selanylesters by reactions of acyl chlorides with arylselenols, generated in situ by reaction of diaryl diselenides with hypophosphorous acid (H3PO2) using polyethylene glycol-400 (PEG-400) as the solvent.
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Affiliation(s)
- G. Perin
- LASOL
- Universidade Federal de Pelotas
- Pelotas
- Brazil
| | | | | | - R. G. Jacob
- LASOL
- Universidade Federal de Pelotas
- Pelotas
- Brazil
| | - D. Alves
- LASOL
- Universidade Federal de Pelotas
- Pelotas
- Brazil
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