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Wang L, Li W, Li X, Liu J, Chen Y. Antimicrobial Activity and Mechanisms of Walnut Green Husk Extract. Molecules 2023; 28:7981. [PMID: 38138470 PMCID: PMC10745604 DOI: 10.3390/molecules28247981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 11/28/2023] [Accepted: 12/04/2023] [Indexed: 12/24/2023] Open
Abstract
Walnut green husks (WGHs), by-products of walnut production, are believed to possess antimicrobial properties, making them a potential alternative to antibiotics. In this study, the antibacterial activities of three extracts, derived from WGH, against Staphylococcus aureus, Bacillus subtilis, and Escherichia coli were investigated, and the antibacterial mechanisms of an anhydrous ethanol extract of WGH (WGHa) were examined. The results showed that WGHa exhibited inhibitory effects on all tested bacteria. The ultrahigh-performance liquid chromatography-tandem mass spectrometry analysis revealed that the major active compounds present in WGHa were terpenoids, phenols, and flavonoids. Treatment with WGHa resulted in the leakage of intracellular ions and alkaline phosphatase; a reduction in intracellular ATP content, ATPase activity, and nucleic acid content; as well as cellular metabolic viability. The transmission electron microscopy images showed varying degrees of cell deformation and membrane damage following WGHa treatment. The transcriptome sequencing and differentially expressed gene enrichment analyses revealed an up-regulation in pathways associated with RNA degradation, translation, protein export, and oxidative phosphorylation. Conversely, pathways involved in cell movement and localization, as well as cell wall organization and carbohydrate transport, were found to be down-regulated. These findings suggest that WGHa alters cell membrane permeability and causes damage to the cell wall. Additionally, WGHa interferes with cellular energy metabolism, compromises RNA integrity, and induces DNA replication stress, consequently inhibiting the normal growth and proliferation of bacteria. These findings unveiled the antimicrobial mechanisms of WGHa, highlighting its potential application as an antibiotic alternative.
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Affiliation(s)
| | | | | | | | - Yong Chen
- Xinjiang Key Laboratory of Herbivore Nutrition for Meat & Milk, College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, China; (L.W.); (W.L.); (X.L.); (J.L.)
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2
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Zhao Y, Wang X, Zhang L, Wang K, Wu Y, Yao J, Cui B, Chen Z. Anti-Fungal Activity of Moutan cortex Extracts against Rice Sheath Blight ( Rhizoctonia solani) and Its Action on the Pathogen's Cell Membrane. ACS OMEGA 2022; 7:47048-47055. [PMID: 36570206 PMCID: PMC9773796 DOI: 10.1021/acsomega.2c06150] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
Rice sheath blight (RSB) caused by Rhizoctonia solani is one of the most destructive diseases of rice (Oryza sativa). Although chemical fungicides are the most important control methods, their long-term unreasonable application has brought about problems such as environmental pollution, food risks, and non-target poisoning. Therefore, considering the extraction of fungistatic substances from plants may be an alternative in the future. In this study, we found that the Moutan cortex ethanol extract has excellent antifungal activity against R. solani, with a 100% inhibition rate at 1000 μg/mL, which aroused our great exploration interest. In-depth exploration found that the antifungal active ingredients of M. cortex were mainly concentrated in the petroleum ether extract of the M. cortex ethanol extract, which still maintained a 100% inhibition rate with 250 μg/mL, and its effective medium concentration (EC50) was 145.33 μg/mL against R. solani. Through the measurement of extracellular relative conductivity and OD260, the petroleum ether extract induced leakage of intracellular electrolytes and nucleic acids, indicating that the cell membrane was ruined. Therefore, we preliminarily determined that the cell membrane may be the target of the petroleum ether extract. Moreover, we found that petroleum ether extract reduced the content of ergosterol, a component of the cell membrane, which may be one of the reasons for the cell membrane destruction. Furthermore, the increase of MDA content would lead to membrane lipid peroxidation, further aggravating membrane damage, resulting in increased membrane permeability. Also, the destruction of the cell membrane was observed by the phenomenon of the mycelium being transparent and broken. In conclusion, this is the first report of the M. cortex petroleum ether extract exhibiting excellent antifungal activity against R. solani. The effect of the M. cortex petroleum ether extract on R. solani may be on the cell membrane, inducing the disorder of intracellular substances and metabolism, which may be one of the antifungal mechanisms against R. solani.
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Affiliation(s)
- Yongtian Zhao
- College
of Life Science and Agriculture, Qiannan
Normal University for Nationalities, Duyun, Guizhou558000, China
| | - Xinge Wang
- College
of Life Science and Agriculture, Qiannan
Normal University for Nationalities, Duyun, Guizhou558000, China
| | - Lian Zhang
- College
of Life Science and Agriculture, Qiannan
Normal University for Nationalities, Duyun, Guizhou558000, China
| | - Keying Wang
- College
of Life Science and Agriculture, Qiannan
Normal University for Nationalities, Duyun, Guizhou558000, China
| | - Yanchun Wu
- College
of Life Science and Agriculture, Qiannan
Normal University for Nationalities, Duyun, Guizhou558000, China
| | - Jia Yao
- College
of Life Science and Agriculture, Qiannan
Normal University for Nationalities, Duyun, Guizhou558000, China
| | - Baolu Cui
- College
of Life Science and Agriculture, Qiannan
Normal University for Nationalities, Duyun, Guizhou558000, China
| | - Zhuo Chen
- Key
Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry
of Education, Guizhou University, Guiyang, Guizhou550025, China
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3
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Liang Q, Cao L, Zhu C, Kong Q, Sun H, Zhang F, Mou H, Liu Z. Characterization of Recombinant Antimicrobial Peptide BMGlv2 Heterologously Expressed in Trichoderma reesei. Int J Mol Sci 2022; 23:ijms231810291. [PMID: 36142214 PMCID: PMC9499586 DOI: 10.3390/ijms231810291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/03/2022] [Accepted: 09/04/2022] [Indexed: 11/16/2022] Open
Abstract
Antimicrobial peptides (AMPs) serve as alternative candidates for antibiotics and have attracted the attention of a wide range of industries for various purposes, including the prevention and treatment of piglet diarrhea in the swine industry. Escherichia coli, Salmonella, and Clostridium perfringens are the most common pathogens causing piglet diarrhea. In this study, the antimicrobial peptide gloverin2 (BMGlv2), derived from Bombyx mandarina, was explored to determine the efficient prevention effect on bacterial piglet diarrhea. BMGlv2 was heterologously expressed in Trichoderma reesei Tu6, and its antimicrobial properties against the three bacteria were characterized. The results showed that the minimum inhibitory concentrations of the peptide against E. coli ATCC 25922, S. derby ATCC 13076, and C. perfringens CVCC 2032 were 43.75, 43.75, and 21.86 μg/mL, respectively. The antimicrobial activity of BMGlv2 was not severely affected by high temperature, salt ions, and digestive enzymes. It had low hemolytic activity against rabbit red blood cells, indicating its safety for use as a feed additive. Furthermore, the measurements of the leakage of bacterial cell contents and scanning electron microscopy of C. perfringens CVCC 2032 indicated that BMGlv2 exerted antimicrobial activity by destroying the cell membrane. Overall, this study showed the heterologous expression of the antimicrobial peptide BMGlv2 in T. reesei and verified its antimicrobial properties against three common pathogenic bacteria associated with piglet diarrhea, which can provide a reference for the applications of AMPs as an alternative product in industrial agriculture.
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Isolation, Identification and Antibacterial Mechanism of the Main Antibacterial Component from Pickled and Dried Mustard (Brassica juncea Coss. var. foliosa Bailey). Molecules 2022; 27:molecules27082418. [PMID: 35458613 PMCID: PMC9026341 DOI: 10.3390/molecules27082418] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/05/2022] [Accepted: 04/05/2022] [Indexed: 12/04/2022] Open
Abstract
Our previous study showed that the ethyl acetate fraction (EAF) from an ethanolic extract of pickled and dried mustard (Brassica juncea Coss. var. foliosa Bailey) had significant antibacterial activity. Here, the EAF was further separated into seven sub-fractions by silica gel column chromatography. The antibacterial activities of the EAF and its sub-fractions against Staphylococcus aureus and Pseudomonas fluorescens were assessed using the agar diffusion method and double dilution method. Among the seven sub-fractions, the third sub-fraction (Fr 3) possessed the strongest antibacterial activity. The main component in Fr 3 was identified by GC-MS, UV-vis, FT-IR, HPLC, 1H NMR and 13C NMR techniques, and was found to be succinic acid. The content of succinic acid in Fr 3 was determined as 88.68% (w/w) by HPLC. Finally, the antibacterial mechanism of succinic acid against the tested strains was explored by determining the intracellular component leakage, measuring the cell particle size and observing the cell morphology. The results showed that succinic acid could damage the cell membrane structure and intracellular structure to increase the leakage of cell components and reduce the cell particle size. Our results suggest that succinic acid could be used in food industry to control bacterial contamination by S. aureus and P. fluorescens.
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Pina-Pérez MC, Úbeda-Manzanaro M, Beyrer M, Martínez A, Rodrigo D. In vivo Assessment of Cold Atmospheric Pressure Plasma Technology on the Bioactivity of Spirulina. Front Microbiol 2022; 12:781871. [PMID: 35140692 PMCID: PMC8819064 DOI: 10.3389/fmicb.2021.781871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 12/24/2021] [Indexed: 11/13/2022] Open
Abstract
The present study challenges the in vivo assessment of cold atmospheric pressure plasma (CAPP) technology on the bioactive activity (antioxidant/antiaging and antimicrobial potential) of Spirulina powder, using Caenorhabditis elegans as an animal model. Surface microdischarge cold atmospheric pressure plasma (SMD-CAPP) treatment was 3.3 W discharge power for 7 min. C. elegans lifespan and egg laying were used as indicators of antioxidant/antiaging potential of Spirulina (1 mg/mL), when grown with Spirulina CP-treated [E_SCP] and untreated [E_S], compared with a control [E_0] (non-supplemented with Spirulina). According to our results, under both Spirulina supplemented media [E_SCP and E_S] and for the first 17 days, nematodes experienced an increase in lifespan but without significant differences (p > 0.05) between control and Spirulina CP-treated. Regarding the in vivo assay of the antimicrobial potential of Spirulina against Salmonella enterica serovar Typhimurium (infected worms), no significant differences (p > 0.05) were found between the three exposure scenarios (control [S_0]; Spirulina supplemented media [S_S]; CP-treated Spirulina supplemented media [S_SCP]). According to present results, CAPP-treatment do not influence negatively the lifespan of C. elegans but a reduction in the Spirulina antiaging potential was found. No in vivo modifications in antimicrobial activity seem to be linked to CAPP-processed Spirulina.
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Affiliation(s)
- María Consuelo Pina-Pérez
- Departamento de Microbiología y Ecología, Universitat de València, Burjassot, Valencia, Spain
- Food Engineering Laboratory, Institute of Life Technologies, University of Applied Sciences and Arts Western-Switzerland (HES-SO) Valais-Wallis, Sion, Switzerland
| | - María Úbeda-Manzanaro
- Departamento Conservación y Calidad, Instituto de Agroquímica y Tecnología de Alimentos IATA - Consejo Superior de Investigaciones Científicas (CSIC), Valencia, Spain
| | - Michael Beyrer
- Food Engineering Laboratory, Institute of Life Technologies, University of Applied Sciences and Arts Western-Switzerland (HES-SO) Valais-Wallis, Sion, Switzerland
| | - Antonio Martínez
- Departamento Conservación y Calidad, Instituto de Agroquímica y Tecnología de Alimentos IATA - Consejo Superior de Investigaciones Científicas (CSIC), Valencia, Spain
| | - Dolores Rodrigo
- Departamento Conservación y Calidad, Instituto de Agroquímica y Tecnología de Alimentos IATA - Consejo Superior de Investigaciones Científicas (CSIC), Valencia, Spain
- *Correspondence: Dolores Rodrigo,
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6
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Cheng X, Yang Y, Zhu X, Yuan P, Gong B, Ding S, Shan Y. Inhibitory mechanisms of cinnamic acid on the growth of Geotrichum citri-aurantii. Food Control 2022. [DOI: 10.1016/j.foodcont.2021.108459] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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7
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Selective antibacterial activities and storage stability of curcumin-loaded nanoliposomes prepared from bovine milk phospholipid and cholesterol. Food Chem 2021; 367:130700. [PMID: 34352694 DOI: 10.1016/j.foodchem.2021.130700] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 07/20/2021] [Accepted: 07/23/2021] [Indexed: 12/15/2022]
Abstract
Present study prepared curcumin-loaded nanoliposomes using bovine milk, krill phospholipids and cholesterol; and investigated the effects of cholesterol on membrane characteristics, storage stability and antibacterial properties of the curcumin nanoliposomes. Bovine milk phospholipids which have higher saturation than krill phospholipids resulted in formation of curcumin-loaded nanoliposomes with higher encapsulation efficiency (84.78%), larger absolute value of zeta potential and vesicle size (size: 159.15 ± 5.27 nm, zeta potential: -28.3 ± 0.62 mV). Cholesterol helps to formation of a more hydrophobic, compact and tighter bilayer membrane structure which improved the storage stability of nanoliposomes under alkaline (66.25 ± 0.46%), heat (43.25 ± 0.69%) and sunlight (49.44 ± 1.78%) conditions. In addition, curcumin-loaded nanoliposomes can effectively target infectious bacteria which secrete pore-forming toxins such as Staphylococcus aureus by causing the bacterial cell wall to lysis. Findings from present work can guide future development of novel antibacterial agents for use in food preservation.
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8
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Lammari N, Louaer O, Meniai AH, Fessi H, Elaissari A. Plant oils: From chemical composition to encapsulated form use. Int J Pharm 2021; 601:120538. [PMID: 33781879 DOI: 10.1016/j.ijpharm.2021.120538] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 03/05/2021] [Accepted: 03/22/2021] [Indexed: 12/16/2022]
Abstract
The last decade has witnessed a burgeoning global movement towards essential and vegetable oils in the food, agriculture, pharmaceutical, cosmetic, and textile industries thanks to their natural and safe status, broad acceptance by consumers, and versatile functional properties. However, efforts to develop new therapy or functional agents based on plant oils have met with challenges of limited stability and/or reduced efficacy. As a result, there has been increased research interest in the encapsulation of plant oils, whereby the nanocarriers serve as barrier between plant oils and the environment and control oil release leading to improved efficacy, reduced toxicity and enhanced patient compliance and convenience. In this review, special concern has been addressed to the encapsulation of essential and vegetable oils in three types of nanocarriers: polymeric nanoparticles, liposomes and solid lipid nanoparticles. First, the chemical composition of essential and vegetable oils was handled. Moreover, we gather together the research findings reported by the literature regarding the different techniques used to generate these nanocarriers with their significant findings. Finally, differences and similarities between these nanocarriers are discussed, along with current and future applications that are warranted by their structures and properties.
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Affiliation(s)
- Narimane Lammari
- Univ Lyon, University Claude Bernard Lyon-1, CNRS, ISA-UMR 5280, 69622 Villeurbanne, France; Environmental Process Engineering Laboratory, University Constantine 3, Salah Boubnider, Constantine, Algeria
| | - Ouahida Louaer
- Environmental Process Engineering Laboratory, University Constantine 3, Salah Boubnider, Constantine, Algeria
| | - Abdeslam Hassen Meniai
- Environmental Process Engineering Laboratory, University Constantine 3, Salah Boubnider, Constantine, Algeria
| | - Hatem Fessi
- Univ Lyon, Université Claude Bernard Lyon-1, CNRS, LAGEP UMR 5007, F-69622 Lyon, France
| | - Abdelhamid Elaissari
- Univ Lyon, University Claude Bernard Lyon-1, CNRS, ISA-UMR 5280, 69622 Villeurbanne, France.
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9
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ZHAO P, ZHANG Y, DENG H, MENG Y. Antibacterial mechanism of apple phloretin on physiological and morphological properties of Listeria monocytogenes. FOOD SCIENCE AND TECHNOLOGY 2021. [DOI: 10.1590/fst.55120] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Pengtao ZHAO
- Shaanxi Normal University, China; Shaanxi Normal University, China; Shaanxi Normal University, China
| | | | - Hong DENG
- Shaanxi Normal University, China; Shaanxi Normal University, China; Shaanxi Normal University, China
| | - Yonghong MENG
- Shaanxi Normal University, China; Shaanxi Normal University, China; Shaanxi Normal University, China
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10
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Manzoor M, Singh J, Bandral JD, Gani A, Shams R. Food hydrocolloids: Functional, nutraceutical and novel applications for delivery of bioactive compounds. Int J Biol Macromol 2020; 165:554-567. [DOI: 10.1016/j.ijbiomac.2020.09.182] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 09/13/2020] [Accepted: 09/21/2020] [Indexed: 02/06/2023]
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11
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Macroalgae-A Sustainable Source of Chemical Compounds with Biological Activities. Nutrients 2020; 12:nu12103085. [PMID: 33050561 PMCID: PMC7601163 DOI: 10.3390/nu12103085] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 10/02/2020] [Accepted: 10/06/2020] [Indexed: 12/15/2022] Open
Abstract
Nowadays, one of the most important research directions that concerns the scientific world is to exploit the earth’s resources in a sustainable way. Considering the increasing interest in finding new sources of bioactive molecules and functional products, many research studies focused their interest on demonstrating the sustainability of exploiting marine macroalgal biomass as feedstock for wastewater treatment and natural fertilizer, conversion into green biofuels, active ingredients in pharmaceutical and nutraceutical products, or even for the production of functional ingredients and integration in the human food chain. The objective of the present paper was to provide an overview on the recent progress in the exploitation of different macroalgae species as a source of bioactive compounds, mainly emphasizing the latter published data regarding their potential bioactivities, health benefits, and industrial applications.
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12
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Niu QL, Sun H, Liu C, Li J, Liang CX, Zhang RR, Ge FR, Liu W. Croton tiglium essential oil compounds have anti-proliferative and pro-apoptotic effects in A549 lung cancer cell lines. PLoS One 2020; 15:e0231437. [PMID: 32357169 PMCID: PMC7194401 DOI: 10.1371/journal.pone.0231437] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 03/16/2020] [Indexed: 01/22/2023] Open
Abstract
As a traditional Chinese medicine, Croton tiglium has the characteristics of laxative, analgesic, antibacterial and swelling. This study aimed to analyze the chemical composition of C. tiglium essential oil (CTEO) extracted from the seeds of C. tiglium and its cytotoxicity and antitumor effect in vitro. Supercritical CO2 fluid extraction technology was used to extract CTEO and the chemical constituents of the essential oil were identified by comparing the retention indices and mass spectra data taken from the NIST library with those calculated based on the C7-C40 n-alkanes standard. In vitro cytotoxicity of the CTEO was assessed against cancer cell lines (A549) and the human normal bronchial epithelial cells (HBE) using the CCK-8 assay. Proliferation was detected by colony formation experiments. Wound scratch and cell invasion assays were used to detect cell migration and invasion. Levels of apoptotic markers, signaling molecules, and cell cycle regulators expression were characterized by Western blot analysis. As the results, twenty-eight compounds representing 92.39% of the total oil were identified in CTEO. The CTEO has significant antitumor activity on A549 cancer cells (IC50 48.38 μg/mL). In vitro antitumor experiments showed that CTEO treatment significantly inhibited the proliferation and migration of A549 cells, disrupted the cell cycle process, and reduced the expression levels of cyclin A, cyclin B and CDK1. CTEO can also reduce mitochondrial membrane potential, activate caspase-dependent apoptosis pathway, and finally induce apoptosis. CTEO may become an effective anti-cancer drug and will be further developed for cancer treatment.
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Affiliation(s)
- Qing-lin Niu
- Shandong Provincial Key Laboratory of Fruit Tree Biotechnology Breeding, Shandong Institute of Pomology, Tai’an, Shandong, China
- * E-mail: (Q-lN); (HS)
| | - Hui Sun
- Key Laboratory of Novel Food Resources Processing, Ministry of Agriculture and Rural Affairs/Key Laboratory of Agro-Products Processing Technology of Shandong Province/Institute of Agro-Food Science and Technology, Shandong Academy of Agricultural Sciences, Jinan, Shandong, China
- * E-mail: (Q-lN); (HS)
| | - Chao Liu
- Key Laboratory of Novel Food Resources Processing, Ministry of Agriculture and Rural Affairs/Key Laboratory of Agro-Products Processing Technology of Shandong Province/Institute of Agro-Food Science and Technology, Shandong Academy of Agricultural Sciences, Jinan, Shandong, China
| | - Juan Li
- Taian Traditional Chinese Medicine Hospital, Tai’an, Shandong, China
| | - Chang-xu Liang
- School of Water Conservancy and Environment, University of Jinan, Jinan, Shandong, China
| | - Rui-rui Zhang
- Key Laboratory of Novel Food Resources Processing, Ministry of Agriculture and Rural Affairs/Key Laboratory of Agro-Products Processing Technology of Shandong Province/Institute of Agro-Food Science and Technology, Shandong Academy of Agricultural Sciences, Jinan, Shandong, China
| | - Fu-rong Ge
- Shandong Provincial Key Laboratory of Fruit Tree Biotechnology Breeding, Shandong Institute of Pomology, Tai’an, Shandong, China
| | - Wei Liu
- Shandong Provincial Key Laboratory of Fruit Tree Biotechnology Breeding, Shandong Institute of Pomology, Tai’an, Shandong, China
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Antibacterial Effects of Schisandra chinensis Extract on Escherichia coli and its Applications in Cosmetic. Curr Microbiol 2020; 77:865-874. [PMID: 31938806 DOI: 10.1007/s00284-019-01813-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 11/11/2019] [Indexed: 02/06/2023]
Abstract
Schisandra chinensis (Turcz.) Baill (S. chinensis), an edible traditional medicine herb, has a strong constitution, which extract has good antibacterial activity. The study investigated its antibacterial properties on E. coli, to find a candidate for the development as new preservative. In vitro antibacterial assay showed that S. chinensis extract (SCE) effectively inhibited the growth of test bacteria with MBC of 18 mg/mL. In model cosmetic system of O/W emulsions, SCE possessed a great antibacterial capacity. The growth curves of E. coli treated with SCE exhibited an extended lag phase and restricted log phase. Scanning electron microscopy showed that the treated E. coli cells exhibited wrinkled and withered surfaces, and disappearing outmost layer, suggesting S. chinensis extract can damage S. aureus cell member and wall, in addition, the leakage of periplasm enzyme AKPase and the increased activities of Na+/K+-ATPase and Ca++-ATPase in cell membrane were also consistent with the microscopy results. Moreover, the S. chinensis extract can decrease the activities of dehydrogenase and total ATPase and the content of intracellular proteins, and bind with S. aureus DNA by electrostatic and groove binding. The results indicated that SCE might be a candidate cosmetic preservative for its good antibacterial activity and multiple targets on E. coli.
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Woo H, Kang J, Lee C, Song KB. Application of
Cudrania tricuspidata
leaf extract as a washing agent to inactivate
Listeria monocytogenes
on fresh‐cut romaine lettuce and kale. Int J Food Sci Technol 2020. [DOI: 10.1111/ijfs.14305] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Hyuk‐Je Woo
- Department of Food Science and Technology Chungnam National University Daejeon34134Korea
| | - Ji‐Hoon Kang
- Department of Food Science and Technology Chungnam National University Daejeon34134Korea
| | - Chae‐Hun Lee
- Department of Food Science and Technology Chungnam National University Daejeon34134Korea
| | - Kyung Bin Song
- Department of Food Science and Technology Chungnam National University Daejeon34134Korea
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Purification, characterization and mode of action of enterocin, a novel bacteriocin produced by Enterococcus faecium TJUQ1. Int J Biol Macromol 2019; 144:151-159. [PMID: 31846663 DOI: 10.1016/j.ijbiomac.2019.12.090] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 11/28/2019] [Accepted: 12/11/2019] [Indexed: 12/12/2022]
Abstract
Enterococcus faecium TJUQ1 with high bacteriocin-producing ability was isolated from pickled Chinese celery. In this study, enterocin TJUQ1 was purified by ammonium sulfate precipitation, reversed-phase chromatography (Sep-Pak C8) and cation-exchange chromatography. The activity of the purified bacteriocin was 44,566.41 ± 874.69 AU/mg, which corresponds to a purification fold of 35.89 ± 2.34. The molecular mass was 5520 Da by MALDI-TOF MS and Tris-Tricine SDS-PAGE. The result of LC-MS/MS showed that the bacteriocin shared 59.15% identity with enterocin produced by E. faecium GN (accession no. O34071). PCR amplification revealed that E. faecium TJUQ1 possesses a gene encoding enterocin B with 60% identity to enterocin B. Circular dichroism (CD) spectroscopy showed that the molecular conformation was 32.6% helix, 19.5% beta, 12.9% turn and 35.0% random. The stability of enterocin TJUQ1 was measured. After exposure at 121 °C for 15 min, the residual antimicrobial activity of enterocin TJUQ1 was 85.95 ± 1.32%. The antimicrobial activity of enterocin TJUQ1 was still active over a pH range of 3-11. Enterocin TJUQ1 was inactivated after exposure to proteolytic enzymes but was not inactivated by lipase or amylase. These results showed that enterocin TJUQ1 was a novel class II bacteriocin. Enterocin TJUQ1 showed wide antibacterial activity against food-borne gram-negative and gram-positive pathogens, such as Staphylococcus aureus, Listeria monocytogenes, Escherichia coli and Salmonella enterica. The MIC was 5.26 ± 0.24 μg/mL against L. monocytogenes CMCC 1595. SEM and TEM were used to observe the changes in the morphological and intracellular organization of L. monocytogenes CMCC 1595 cells treated with enterocin TJUQ1. The results demonstrated that enterocin TJUQ1 increased extracellular electrical conductivity, facilitated pore formation, triggered the release of UV-absorbing materials, ATP and LDH, and even caused cell lysis in L. monocytogenes CMCC 1595 cells. Based on the characterization, the wide inhibitory spectrum and mode of action determined so far, enterocin TJUQ1 is a potential preservative for the food industry.
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Zhou D, Liu ZH, Wang DM, Li DW, Yang LN, Wang W. Chemical composition, antibacterial activity and related mechanism of valonia and shell from Quercus variabilis Blume (Fagaceae) against Salmonella paratyphi a and Staphylococcus aureus. Altern Ther Health Med 2019; 19:271. [PMID: 31627724 PMCID: PMC6798350 DOI: 10.1186/s12906-019-2690-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Accepted: 09/20/2019] [Indexed: 11/10/2022]
Abstract
BACKGROUND Plant secondary metabolites and phytochemicals that exhibit strong bioactivities have potential to be developed as safe and efficient natural antimicrobials against food contamination and addressing antimicrobial resistance caused by the overuse of chemical synthetic preservative. In this study, the chemical composition, antibacterial activities and related mechanism of the extracts of the valonia and the shell of Quercus variabilis Blume were studied to determine its potential as a safe and efficient natural antimicrobial. METHODS The phenolic compositions of valonia and shell extracts were determined by folin-ciocalteau colourimetric method, sodium borohydride/chloranil-based assay and the aluminium chloride method and then further identified by the reverse-phase HPLC analysis. The antibacterial activities of valonia and shell extracts were evaluated by the agar disk diffusion method and agar dilution method. The related antibacterial mechanism was explored successively by the membrane of pathogens effect, phosphorous metabolism, whole-cell proteins and the microbial morphology under scanning electron microscopy. RESULTS The n-butanol fraction and water fraction of valonia along with n-butanol fraction of the shell contains enrich phenolics including ellagic acid, theophylline, caffeic acid and tannin acid. The n-butanol fraction and ethanol crude extracts of valonia exhibited strong antibacterial activities against Salmonella paratyphi A (S. paratyphi A) and Staphylococcus aureus (S. aureus) with the DIZ values ranged from 10.89 ± 0.12 to 15.92 ± 0.44, which were greater than that of the Punica granatum (DIZ: 10.22 ± 0.18 and 10.30 ± 0.21). The MIC values of the n-butanol fraction and ethanol crude extracts of valonia against S. paratyphi A and S. aureus were 1.25 mg/ml and 0.625 mg/ml. The related antibacterial mechanism of n-butanol fraction and ethanol crude extracts of valonia may be attributed to their strong impact on membrane permeability and cellular metabolism. Those extracts exhibited strong antibacterial activity according to inhibit the synthesis of bacterial proteins and seriously change morphological structure of bacterial cells. CONCLUSIONS The n-butanol fraction and ethanol crude extracts of valonia had reasonably good antibacterial activities against S. paratyphi A and S. aureus. This study suggests possible application of valonia and shell as natural antimicrobials or preservatives for food and medical application.
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Kumar A, Kamal A, Singh S, Padalia RC, Tandon S, Chauhan A, Saikia D, Verma RS. Chemical composition, antimicrobial activity, kinetics and mechanism of action of Himalayan-thyme (Thymus linearis Benth.). JOURNAL OF ESSENTIAL OIL RESEARCH 2019. [DOI: 10.1080/10412905.2019.1662337] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Ajay Kumar
- Molecular Bioprospection Department, CSIR-Central Institute of Medicinal and Aromatic Plants (CIMAP), Lucknow, India
| | - Aditi Kamal
- CSIR-Central Institute of Medicinal and Aromatic Plants (CIMAP), Research Centre Pantnagar, India
| | - Swati Singh
- Process Chemistry & Technology Department, CSIR-Central Institute of Medicinal and Aromatic Plants (CIMAP), Lucknow, India
| | - Rajendra Chandra Padalia
- CSIR-Central Institute of Medicinal and Aromatic Plants (CIMAP), Research Centre Pantnagar, India
| | - Sudeep Tandon
- Process Chemistry & Technology Department, CSIR-Central Institute of Medicinal and Aromatic Plants (CIMAP), Lucknow, India
| | - Amit Chauhan
- CSIR-Central Institute of Medicinal and Aromatic Plants (CIMAP), Research Centre Pantnagar, India
| | - Dharmendra Saikia
- Molecular Bioprospection Department, CSIR-Central Institute of Medicinal and Aromatic Plants (CIMAP), Lucknow, India
| | - Ram Swaroop Verma
- CSIR-Central Institute of Medicinal and Aromatic Plants (CIMAP), Research Centre Pantnagar, India
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Sun X, Yang X, Xue P, Zhang Z, Ren G. Improved antibacterial effects of alkali-transformed saponin from quinoa husks against halitosis-related bacteria. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 19:46. [PMID: 30755185 PMCID: PMC6373059 DOI: 10.1186/s12906-019-2455-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 02/05/2019] [Indexed: 11/10/2022]
Abstract
Background Quinoa is a food crop native to the Andes. The process of dehulling quinoa can produce approximately 8–12% husk, which is often discarded because it contains bitter saponin. Saponin derived from quinoa has been reported to exhibit anti-inflammatory and antifungal activity. However, the antibacterial effects of quinoa saponin against halitosis-related bacteria are still unclear. Methods In this study, quinoa saponin (QS) and alkali-transformed saponin (ATS) were separated by AB-2 resin to obtain QS-30, QS-80, ATS-30 and ATS-80. Halitosis-related bacteria included Porphyromonas gingivalis (P. gingivalis), Clostridium perfringens (C. perfringens) and Fusobacterium nucleatum (F. nucleatum). The MIC and MBC were determined using gradient dilutions in 96-well plates, and the saponins were identified by HPLC and mass spectrometry. The changes in membrane integrity were tested using a microplate reader, the membrane potential was tested by spectrofluorometry, and the morphological characteristics were examined using a transmission electron microscope to explore the antibacterial mechanisms. Results Antibacterial assays indicated that QS-80 and ATS-80 showed inhibitory activity. In addition, ATS-80 exerted a stronger inhibitory effect than QS-80, especially against Fusobacterium nucleatum, with a lower minimum inhibitory concentration (31.3 μg/mL) and a lower minimum bactericidal concentration (125 μg/mL). ATS-80 destroyed the bacterial membrane structure, leading to bacterial death. Conclusions Based on the excellent antibacterial activity and economic prospects of quinoa husk, ATS-80 could be used as an antibacterial agent to treat halitosis.
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Wu Y, An J, Liu Y, Wang Y, Ren W, Fang Z, Sun L, Gooneratne R. Mode of action of a novel anti-Listeria bacteriocin (CAMT2) produced by Bacillus amyloliquefaciens ZJHD3-06 from Epinephelus areolatus. Arch Microbiol 2018; 201:61-66. [PMID: 30203187 DOI: 10.1007/s00203-018-1553-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 07/13/2018] [Accepted: 07/17/2018] [Indexed: 10/28/2022]
Abstract
Bacteriocin CAMT2, produced by Bacillus amyloliquefaciens ZJHD3-06, has been shown to exhibit protective activity against important food spoilage and food-borne bacterial pathogens. This study was conducted to investigate the mode of action of bacteriocin CAMT2 against highly pathogenic Listeria monocytogenes ATCC 19111. The addition of bacteriocin CAMT2 at 64 AU/ml inhibited L. monocytogenes ATCC 19111. An efflux of K+ ions, lactic acid dehydrogenase and an increase in extracellular electrical conductivity was observed in CAMT2-treated L. monocytogenes. Electron microscopy showed morphological alterations such as uneven cell surface, accumulation of cell debris and bacterial lysis. These results show that bacteriocin CAMT2 inhibit L. monocytogenes by increasing cell permeability and inducing membrane damage, hence it has the great application potentials in ensuring food safety.
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Affiliation(s)
- Yaqian Wu
- College of Food Science and Technology, Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Key Laboratory of Advanced Processing of Aquatic Products of Guangdong Higher Education Institution, Zhanjiang, 524088, China
| | - Junying An
- College of Food Science and Technology, Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Key Laboratory of Advanced Processing of Aquatic Products of Guangdong Higher Education Institution, Zhanjiang, 524088, China
| | - Ying Liu
- College of Food Science and Technology, Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Key Laboratory of Advanced Processing of Aquatic Products of Guangdong Higher Education Institution, Zhanjiang, 524088, China.
| | - Yaling Wang
- College of Food Science and Technology, Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Key Laboratory of Advanced Processing of Aquatic Products of Guangdong Higher Education Institution, Zhanjiang, 524088, China
| | - Wenbin Ren
- Zhongkai University of Agriculture and Engineering, Guangzhou, 510230, China
| | - Zhijia Fang
- College of Food Science and Technology, Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Key Laboratory of Advanced Processing of Aquatic Products of Guangdong Higher Education Institution, Zhanjiang, 524088, China
| | - Lijun Sun
- College of Food Science and Technology, Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Key Laboratory of Advanced Processing of Aquatic Products of Guangdong Higher Education Institution, Zhanjiang, 524088, China.
| | - Ravi Gooneratne
- Department of Wine, Food and Molecular Biosciences, Lincoln University, Lincoln, Canterbury, 7647, New Zealand
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21
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Song L, Cui S, Li T, Yang S, Wang Q, He K, Zheng Y, He C. Antibacterial effects of Schisandra chinensis
extract on Staphylococcus aureus
and its application in food. J Food Saf 2018. [DOI: 10.1111/jfs.12503] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Liya Song
- Beijing Key Laboratory of Plant Resources Research and Development; College of Science, Beijing Technology and Business University; Beijing China
| | - Shumei Cui
- Beijing Key Laboratory of Plant Resources Research and Development; College of Science, Beijing Technology and Business University; Beijing China
| | - Ting Li
- Beijing Key Laboratory of Plant Resources Research and Development; College of Science, Beijing Technology and Business University; Beijing China
| | - Shuran Yang
- Beijing Key Laboratory of Plant Resources Research and Development; College of Science, Beijing Technology and Business University; Beijing China
| | - Qian Wang
- Beijing Key Laboratory of Plant Resources Research and Development; College of Science, Beijing Technology and Business University; Beijing China
| | - Keke He
- Beijing Key Laboratory of Plant Resources Research and Development; College of Science, Beijing Technology and Business University; Beijing China
| | - Yumei Zheng
- Beijing Key Laboratory of Plant Resources Research and Development; College of Science, Beijing Technology and Business University; Beijing China
| | - Congfen He
- Beijing Key Laboratory of Plant Resources Research and Development; College of Science, Beijing Technology and Business University; Beijing China
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Wu Y, Bai J, Liu X, Liu L, Zhong K, Huang Y, Gao H. Antibacterial effect of 3-p-trans-coumaroyl-2-hydroxyquinic acid, a phenolic compound from needles ofCedrus deodara, on cellular functions ofStaphylococcus aureus. RSC Adv 2018; 8:4969-4975. [PMID: 35539522 PMCID: PMC9077780 DOI: 10.1039/c7ra13457f] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 01/22/2018] [Indexed: 11/21/2022] Open
Abstract
Structure–activity relationship of 3-p-trans-coumaroyl-2-hydroxyquinic acid, a phenolic compound from needles ofCedrus deodara, againstStaphylococcus aureusand its effect on the cellular functions.
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Affiliation(s)
- Yanping Wu
- Healthy Food Evaluation Research Center
- Sichuan University
- Chengdu 610065
- China
- Department of Food Science and Technology
| | - Jinrong Bai
- Department of Food Science and Technology
- College of Light Industry, Textile and Food Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Xiaoyan Liu
- Department of Food Science and Technology
- College of Light Industry, Textile and Food Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Lijin Liu
- Department of Public Health
- West China Medical School
- Sichuan University
- Chengdu 610041
- China
| | - Kai Zhong
- Healthy Food Evaluation Research Center
- Sichuan University
- Chengdu 610065
- China
- Department of Food Science and Technology
| | - Yina Huang
- Department of Public Health
- West China Medical School
- Sichuan University
- Chengdu 610041
- China
| | - Hong Gao
- Healthy Food Evaluation Research Center
- Sichuan University
- Chengdu 610065
- China
- Department of Food Science and Technology
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Pina-Pérez MC, Rivas A, Martínez A, Rodrigo D. Antimicrobial potential of macro and microalgae against pathogenic and spoilage microorganisms in food. Food Chem 2017; 235:34-44. [PMID: 28554644 PMCID: PMC7131516 DOI: 10.1016/j.foodchem.2017.05.033] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 05/01/2017] [Accepted: 05/06/2017] [Indexed: 11/16/2022]
Abstract
Algae are a valuable and never-failing source of bioactive compounds. The increasing efforts to use ingredients that are as natural as possible in the formulation of innovative products has given rise to the introduction of macro and microalgae in food industry. To date, scarce information has been published about algae ingredients as antimicrobials in food. The antimicrobial potential of algae is highly dependent on: (i) type, brown algae being the most effective against foodborne bacteria; (ii) the solvent used in the extraction of bioactive compounds, ethanolic and methanolic extracts being highly effective against Gram-positive and Gram-negative bacteria; and (iii) the concentration of the extract. The present paper reviews the main antimicrobial potential of algal species and their bioactive compounds in reference and real food matrices. The validation of the algae antimicrobial potential in real food matrices is still a research niche, being meat and bakery products the most studied substrates.
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Affiliation(s)
- M C Pina-Pérez
- Centro Avanzado de Microbiología de Alimentos (CAMA) - Universitat Politècnica de Valencia (UPV), Camino de Vera s/n, 46022 Valencia, Spain.
| | - A Rivas
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Departamento Conservación y Calidad de los Alimentos, Avda. Agustin Escardino, 7, 46980 Paterna, Valencia, Spain
| | - A Martínez
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Departamento Conservación y Calidad de los Alimentos, Avda. Agustin Escardino, 7, 46980 Paterna, Valencia, Spain
| | - D Rodrigo
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Departamento Conservación y Calidad de los Alimentos, Avda. Agustin Escardino, 7, 46980 Paterna, Valencia, Spain
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Lin L, Dai Y, Cui H. Antibacterial poly(ethylene oxide) electrospun nanofibers containing cinnamon essential oil/beta-cyclodextrin proteoliposomes. Carbohydr Polym 2017; 178:131-140. [PMID: 29050578 DOI: 10.1016/j.carbpol.2017.09.043] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 09/12/2017] [Accepted: 09/12/2017] [Indexed: 02/07/2023]
Abstract
A novel antibacterial packaging material was engineered by incorporating cinnamon essential oil/β-cyclodextrin (CEO/β-CD) proteoliposomes into poly(ethylene oxide) (PEO) nanofibers by electrospinning technique. Herein, PEO was a stabilizing polymer and used as electrospinning polymeric matrix for the fabrication of CEO/β-CD proteoliposomes nanofibers. The nanoliposomes were inlaid with protein are defined as proteoliposomes. Taking advantage of bacterial protease secreted from Bacillus cereus (B. cereus), the controlled release of CEO from proteoliposomes was achieved via proteolysis of protein in proteoliposomes. The CEO/β-CD inclusion complex was prepared by the aqueous solution method and characterized by Raman and FTIR spectroscopy. After the treatment of CEO/β-CD proteoliposomes nanofibers packaging, the satisfactory antibacterial efficiency against B. cereus on beef was realized without any impact on sensory quality of beef. This study demonstrated that the CEO/β-CD proteoliposomes nanofibers can significantly extend the shelf life of beef and have potential application in active food packaging.
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Affiliation(s)
- Lin Lin
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Yajie Dai
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Haiying Cui
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
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Meng X, Li D, Zhou D, Wang D, Liu Q, Fan S. Chemical composition, antibacterial activity and related mechanism of the essential oil from the leaves of Juniperus rigida Sieb. et Zucc against Klebsiella pneumoniae. JOURNAL OF ETHNOPHARMACOLOGY 2016; 194:698-705. [PMID: 27769947 DOI: 10.1016/j.jep.2016.10.050] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 09/29/2016] [Accepted: 10/17/2016] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Juniperus rigida is used as Tibetan and Mongolian medicine in China for the treatment of rheumatoid arthritis, nephritis, brucellosis and other various inflammatory diseases. AIM OF THE STUDY To evaluate antibacterial potential of essential oils from J. rigida leaves against Klebsiella pneumoniae and to examine its possible related mechanisms. The study was undertaken in order to scientifically validate the traditional use of J. rigida. MATERIALS AND METHODS The essential oil was extracted from the leaves of J. rigida by supercritical CO2 fluid extraction technology. Chemical composition of essential oils was analyzed by gas chromatography-mass spectrometry (GC-MS). The antibacterial activity was evaluated against 10 bacteria by the paper disc diffusion method. The minimum inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) values of the essential oil were estimated by agar dilution method. The antibacterial mechanism was evaluated by growth curve, the integrity of cell membrane, the SDS-PAGE of protein patterns and scanning electron microscope (SEM). RESULTS 61 components were identified from the essential oil. Caryophyllene (13.11%) and α-Caryophyllene (11.72%) were found to be the major components. The antibacterial activities of the essential oil were screened and compared against 10 bacteria. The essential oil showed good antibacterial activity against K. pneumoniae, with the biggest diameters of inhibition zones (DIZ) (16.00±0.25mm) and the lowest MIC and MBC values of 3.125mg/mL. The increase in proteins, 260nm absorbing materials of bacterial cells suspension indicated that the cytoplasmic membranes were broken by the essential oil. The SDS-PAGE of bacterial proteins demonstrated that the essential oil could damage bacterial cells through the destruction of cellular proteins. Scanning electron microscopy (SEM) showed that the essential oil damaged the morphology of cell wall and membrane. CONCLUSIONS The essential oil of J. rigida has potential antibacterial activities against K. pneumoniae. The antibacterial mechanism is the essential oil causing the irreversible damage to the cell wall and membrane, leading to the leakage of proteins and 260nm absorbing materials (DNA and RNA). Further phytochemical and pharmacological studies are required for proper scientific validation of the folk use of this plant species.
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Affiliation(s)
- Xiaxia Meng
- College of Forestry, Northwest A & F University, Yangling, Shaanxi 712100, China.
| | - Dengwu Li
- College of Forestry, Northwest A & F University, Yangling, Shaanxi 712100, China.
| | - Dan Zhou
- College of Forestry, Northwest A & F University, Yangling, Shaanxi 712100, China.
| | - Dongmei Wang
- College of Forestry, Northwest A & F University, Yangling, Shaanxi 712100, China.
| | - Qiaoxiao Liu
- College of Forestry, Northwest A & F University, Yangling, Shaanxi 712100, China.
| | - Sufang Fan
- College of Forestry, Northwest A & F University, Yangling, Shaanxi 712100, China.
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Cui H, Ma C, Li C, Lin L. Enhancing the antibacterial activity of thyme oil against Salmonella on eggshell by plasma-assisted process. Food Control 2016. [DOI: 10.1016/j.foodcont.2016.05.056] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Cui H, Zhao C, Li C, Lin L. Essential Oils-Based Antibacterial Agent Against Escherichia coli
O157:H7 Biofilm on Cucumber. J FOOD PROCESS PRES 2016. [DOI: 10.1111/jfpp.13140] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Haiying Cui
- School of Food and Biological Engineering; Jiangsu University; Zhenjiang 212013 China
| | - Chengting Zhao
- School of Food and Biological Engineering; Jiangsu University; Zhenjiang 212013 China
| | - Changzhu Li
- Hunan Academy of Forestry; Changsha 410007 China
| | - Lin Lin
- School of Food and Biological Engineering; Jiangsu University; Zhenjiang 212013 China
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Antibacterial Activity and Membrane-Disruptive Mechanism of 3-p-trans-Coumaroyl-2-hydroxyquinic Acid, a Novel Phenolic Compound from Pine Needles of Cedrus deodara, against Staphylococcus aureus. Molecules 2016; 21:molecules21081084. [PMID: 27548123 PMCID: PMC6273998 DOI: 10.3390/molecules21081084] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 08/12/2016] [Accepted: 08/15/2016] [Indexed: 12/22/2022] Open
Abstract
Recently, we reported that a novel phenolic compound isolated from Cedrus deodara, 3-p-trans-coumaroyl-2-hydroxyquinic acid (CHQA), exhibits a potent antioxidant activity. The present study aimed to evaluate the antibacterial activity of CHQA against eleven food-borne pathogens and to elucidate its mechanism of action against Staphylococcus aureus. The results from minimum inhibitory concentration (MIC) determinations showed that CHQA exhibited moderate inhibitory effects on all of the tested pathogens with MIC values ranging from 2.5-10 mg/mL. Membrane potential measurements and flow cytometric analysis demonstrated that CHQA damaged the cytoplasmic membrane of S. aureus, causing a significant membrane hyperpolarization with a loss of membrane integrity. Moreover, CHQA induced an increase in membrane fluidity and conformational changes in membrane protein of S. aureus, suggesting that CHQA probably acts on the cell membrane by interactions with membrane lipid and protein. Transmission electron microscopic observations further confirmed that CHQA disrupted the cell membrane of S. aureus and caused severe morphological changes, which even led to leakage of intracellular constituents. These findings indicated that CHQA could have the potential to serve as a natural antibacterial agent to control and prevent the growth of pathogens in food and in food-processing environments.
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29
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Cui H, Ma C, Lin L. Synergetic antibacterial efficacy of cold nitrogen plasma and clove oil against Escherichia coli O157:H7 biofilms on lettuce. Food Control 2016. [DOI: 10.1016/j.foodcont.2016.01.035] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Özcan G, Demirel Zorba NN. Combined effect of ultrasound and essential oils to reduce Listeria monocytogenes on fresh produce. FOOD SCI TECHNOL INT 2016; 22:353-62. [PMID: 26377335 DOI: 10.1177/1082013215604478] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2014] [Accepted: 08/06/2015] [Indexed: 12/16/2023]
Abstract
Salads prepared from contaminated fresh produce have a high risk of causing food-borne illnesses. Essential oils obtained from plants have antimicrobial activity and may provide a natural approach to reduce the pathogens on fresh produce. Additionally, ultrasound treatments have been shown to reduce the microbial counts on different foods. The objective of this study was to investigate the antimicrobial activities of cinnamon and lemon essential oils in vitro and in food applications. Mixtures of lettuce, parsley and dill were inoculated with Listeria monocytogenes and then dip-treated for 5 min in one of the following treatments: sterile tap water, chlorinated water, 1% lemon essential oil, 2% cinnamon essential oil or 2% cinnamon essential oil + ultrasound. The samples were stored at 4 ℃ and collected at d 0, 1, 3, 5, 7 and 9 post inoculation. The 1% lemon (4 log) and 2% cinnamon (2 log) essential oil washes provided partial inhibition against L. monocytogenes by d 1. The combined application of 2% cinnamon oil and ultrasound resulted in only 0.85 log inhibition by d 1; however, the number of L. monocytogenes increased during storage and became nearly equal to the control at d 9. Therefore, different combinations of essential oils with other antimicrobials or novel technologies are required.
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Affiliation(s)
- Gülçin Özcan
- Department of Biology, Faculty of Science and Literature, Çanakkale Onsekiz Mart University, Turkey
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31
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Cui H, Zhang X, Zhou H, Zhao C, Lin L. Antimicrobial activity and mechanisms of Salvia sclarea essential oil. BOTANICAL STUDIES 2015; 56:16. [PMID: 28510825 PMCID: PMC5432889 DOI: 10.1186/s40529-015-0096-4] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 05/29/2015] [Indexed: 05/15/2023]
Abstract
BACKGROUND Nowadays, essential oils are recognized as safe substances and can be used as antibacterial additives. Salvia sclarea is one of the most important aromatic plants cultivated world-wide as a source of essential oils. In addition to being flavoring foods, Salvia sclarea essential oil can also act as antimicrobials and preservatives against food spoilage. Understanding more about the antibacterial performance and possible mechanism of Salvia sclarea essential oil will be helpful for its application in the future. But so far few related researches have been reported. RESULTS In our study, Salvia sclarea oil showed obvious antibacterial activity against all tested bacterial strains. Minimum inhibitory concentration (MIC) and minimum bactericide concentration (MBC) of seven pathogens were 0.05 and 0.1 % respectively. In addition, Salvia sclarea oil also exhibited a significant inhibitory effect on the growth of Escherichia coli (E. coli) in phosphate buffer saline (PBS) and meats. After treated with Salvia sclarea oil, Scanning Electron Microscope (SEM) images can clearly see the damage of cell membrane; the intracellular ATP concentrations of E. coli and S. aureus reduced 98.27 and 69.61 % respectively, compared to the control groups; the nuclear DNA content of E. coli and S. aureus was significantly reduced to 48.32 and 50.77 % respectively. In addition, there was massive leakage of cellular material when E. coli and S. aureus were exposed to Salvia sclarea oil. CONCLUSIONS Salvia sclarea essential oil damaged the cell membrane and changed the cell membrane permeability, leading to the release of some cytoplasm such as macromolecular substances, ATP and DNA. In general, the antimicrobial action of Salvia sclarea essential oil is not only attributable to a unique pathway, but also involves a series of events both on the cell surface and within the cytoplasm. Therefore, more experiments need to be done to fully understand the antimicrobial mechanism of Salvia sclarea essential oil.
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Affiliation(s)
- Haiying Cui
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Xuejing Zhang
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Hui Zhou
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Chengting Zhao
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Lin Lin
- School of Food & Biological Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China.
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32
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Cui H, Zhao C, Lin L. The specific antibacterial activity of liposome-encapsulated Clove oil and its application in tofu. Food Control 2015. [DOI: 10.1016/j.foodcont.2015.03.026] [Citation(s) in RCA: 139] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Cui H, Zhao C, Lin L. Antibacterial Activity of H
elichrysum italicum
Oil on Vegetables and Its Mechanism of Action. J FOOD PROCESS PRES 2015. [DOI: 10.1111/jfpp.12516] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Haiying Cui
- School of Food & Biological Engineering; Jiangsu University; Zhenjiang 212013 China
| | - Chengting Zhao
- School of Food & Biological Engineering; Jiangsu University; Zhenjiang 212013 China
| | - Lin Lin
- School of Food & Biological Engineering; Jiangsu University; Zhenjiang 212013 China
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