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Ning HQ, Li YQ, Lin H, Wang JX. Apoptosis-induction effect of ε-poly-lysine against Staphylococcus aureus and its application on pasteurized milk. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2020.110493] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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52
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Roy S, Rhim JW. New insight into melanin for food packaging and biotechnology applications. Crit Rev Food Sci Nutr 2021; 62:4629-4655. [PMID: 33523716 DOI: 10.1080/10408398.2021.1878097] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Melanin is a dark brown to black biomacromolecule with biologically active multifunctional properties that do not have a precise chemical structure, but its structure mainly depends on the polymerization conditions during the synthesis process. Natural melanin can be isolated from various animal, plant, and microbial sources, while synthetic melanin-like compounds can be synthesized by simple polymerization of dopamine. Melanin is widely used in various areas due to its functional properties such as photosensitivity, light barrier property, free radical scavenging ability, antioxidant activity, etc. It also has an excellent ability to act as a reducing agent and capping agent to synthesize various metal nanoparticles. Melanin nanoparticles (MNP) or melanin-like nanoparticles (MLNP) have the unique potential to act as functional materials to improve nanocomposite films' physical and functional properties. Various food packaging and biomedical applications have been made alone or by mixing melanin or MLNP. In this review, the general aspects of melanin that highlight biological activity, along with a description of MNP and the use as nanofillers in packaging films as well as reducing and capping agents and biomedical applications, were comprehensively reviewed.
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Affiliation(s)
- Swarup Roy
- Department of Food and Nutrition, BioNanocomposite Research Center, Kyung Hee University, Seoul, Republic of Korea
| | - Jong-Whan Rhim
- Department of Food and Nutrition, BioNanocomposite Research Center, Kyung Hee University, Seoul, Republic of Korea
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Gao Y, Ji Y, Li W, Luo J, Wang F, Zhang X, Niu Z, Zhou L, Yan L. Endophytic Fungi from Dalbergia odorifera T. Chen Producing Naringenin Inhibit the Growth of Staphylococcus aureus by Interfering with Cell Membrane, DNA, and Protein. J Med Food 2021; 24:116-123. [PMID: 33523769 DOI: 10.1089/jmf.2020.4686] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
This study focused on the antibacterial effects of the endophytic fungi producing naringenin from Dalbergia odorifera T. Chen against Staphylococcus aureus. The antibacterial activity was measured by the inhibition diameters, minimum inhibitory concentration (MIC), and minimum bactericidal concentration (MBC). The time-killing curve was also used to evaluate its antibacterial efficacy. The results of antibacterial activity determinations showed that endophytic fungi secondary metabolites can inhibit the growth of five pathogenic bacteria (S. aureus, Escherichia coli, Salmonella enteritidis, Pseudomonas aeruginosa, and Bacillus subtilis) and the most sensitive strain was S. aureus that had the MIC and MBC values of 0.13 and 0.50 mg/mL, respectively. The membrane permeability study was measured by a DNA leakage assay and electrical conductivity assay. Furthermore, the whole-cell protein lysates and DNA fragmentation assay was evaluated. The morphology of S. aureus treated with the endophytic fungi products was observed by scanning electron microscopy (SEM). The probable antibacterial mechanism of endophytic fungi secondary metabolites was the increased membrane permeability that leads to leaks of nucleic acids and proteins. SEM results further confirmed that the extracts can interfere with the integrity of S. aureus cell membrane and further inhibit the growth of bacteria, resulting in the death of bacteria. This study provides a new perspective for the antibacterial functions of endophytic fungi secondary metabolites for biomedical applications.
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Affiliation(s)
- Yuan Gao
- School of Pharmacy, Harbin University of Commerce, Harbin, Heilongjiang, China.,Post-Doctoral Research Center of Traditional Chinese Medicine, Harbin University of Commerce, Harbin, Heilongjiang, China
| | - Yubin Ji
- School of Pharmacy, Harbin University of Commerce, Harbin, Heilongjiang, China.,Post-Doctoral Research Center of Traditional Chinese Medicine, Harbin University of Commerce, Harbin, Heilongjiang, China
| | - Wenlan Li
- School of Pharmacy, Harbin University of Commerce, Harbin, Heilongjiang, China.,Post-Doctoral Research Center of Traditional Chinese Medicine, Harbin University of Commerce, Harbin, Heilongjiang, China
| | - Jianghan Luo
- School of Pharmacy, Harbin University of Commerce, Harbin, Heilongjiang, China
| | - Fuling Wang
- School of Pharmacy, Harbin University of Commerce, Harbin, Heilongjiang, China
| | - Xiaomeng Zhang
- School of Pharmacy, Harbin University of Commerce, Harbin, Heilongjiang, China
| | - Zhihui Niu
- School of Pharmacy, Harbin University of Commerce, Harbin, Heilongjiang, China
| | - Lulu Zhou
- School of Pharmacy, Harbin University of Commerce, Harbin, Heilongjiang, China
| | - Lijun Yan
- School of Pharmacy, Harbin University of Commerce, Harbin, Heilongjiang, China
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Rahmani Eliato T, Smith JT, Tian Z, Kim ES, Hwang W, Andam CP, Kim YJ. Melanin pigments extracted from horsehair as antibacterial agents. J Mater Chem B 2020; 9:1536-1545. [PMID: 33320923 DOI: 10.1039/d0tb02475a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Here we present the important findings related to biologically derived pigments for potential use as antibacterial agents. Melanin biopigments extracted from Equus ferus hair exhibit a homogeneous elliptical microstructure with highly ordered semicrystalline features. Spectroscopic analysis indicates that melanin contains a high degree of redox active catechol groups, which can produce reactive oxygen species. The antibacterial activity of melanins was tested by incubating Escherichia coli and Staphylococcus aureus with melanins. The results showed 100% bacterial growth inhibition within 4 h. This finding suggests that melanin pigments may serve as naturally occurring antibacterial agents with unique redox chemistry and reactive oxygen species generation capability.
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Affiliation(s)
| | - Joshua T Smith
- Department of Molecular, Cellular and Biomedical Sciences, University of New Hampshire, Durham, NH 03824, USA
| | - Zhen Tian
- Department of Chemical Engineering, University of New Hampshire, Durham, NH 03824, USA.
| | - Eun-Sik Kim
- Department of Environmental System Engineering, Chonnam National University, Yeosu, 59626, Republic of Korea
| | - Wonseok Hwang
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20740, USA
| | - Cheryl P Andam
- Department of Molecular, Cellular and Biomedical Sciences, University of New Hampshire, Durham, NH 03824, USA and Department of Biological Sciences, University at Albany, State University of New York, Albany, NY 12222, USA
| | - Young Jo Kim
- Department of Chemical Engineering, University of New Hampshire, Durham, NH 03824, USA.
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Ning H, Wang S, Li Y, Sun G, He J. The cell structure damage and embden-meyerhof-parnas pathway inhibition of Listeria monocytogenes induced by glycinin basic peptide. Microb Pathog 2020; 152:104635. [PMID: 33232764 DOI: 10.1016/j.micpath.2020.104635] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 11/16/2020] [Accepted: 11/17/2020] [Indexed: 10/22/2022]
Abstract
Glycinin basic peptide (GBP) is a natural antibacterial peptide. This study aimed to explore the antibacterial characteristics of GBP against Listeria monocytogenes (L. monocytogenes) by measuring the membrane potential, membrane permeability, cell damage, morphological changes, respiration metabolism inhibition and DNA content. GBP increased the surface zeta potential and decreased the trans-membrane potential of L. monocytogenes in a dose-dependent manner. Compared with the control, the electrical conductivities of GBP-treated bacterial suspensions were significantly increased. The percentages of bacteria with damaged membrane increased from 6.40% to 70.90% with GBP from 0 to 0.8 mg/mL. Obvious rupture and deform of bacterial cells with GBP were observed by transmission electron microscope (TEM), showing the destructive effect of GBP on L. monocytogenes. GBP also inhibited the embden-meyerhof-parnas pathway of the bacterial respiration metabolism and reduced the activities of its key regulator enzymes. Besides, the content of DNA in GBP-treated L. monocytogenes was lower than that in control.
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Affiliation(s)
- Houqi Ning
- School of Food Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), No. 3501 University Road of Changqing District, 250353, Jinan, Shandong Province, China
| | - Shuangtong Wang
- School of Food Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), No. 3501 University Road of Changqing District, 250353, Jinan, Shandong Province, China
| | - Yingqiu Li
- School of Food Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), No. 3501 University Road of Changqing District, 250353, Jinan, Shandong Province, China.
| | - Guijin Sun
- School of Food Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), No. 3501 University Road of Changqing District, 250353, Jinan, Shandong Province, China
| | - Jinxing He
- School of Food Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), No. 3501 University Road of Changqing District, 250353, Jinan, Shandong Province, China
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Akter S, Huq MA. Biologically rapid synthesis of silver nanoparticles by Sphingobium sp. MAH-11 T and their antibacterial activity and mechanisms investigation against drug-resistant pathogenic microbes. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2020; 48:672-682. [PMID: 32075448 DOI: 10.1080/21691401.2020.1730390] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The present study highlights the biological synthesis of silver nanoparticles (AgNPs) using Sphingobium sp. MAH-11 and also their antibacterial mechanisms against drug-resistant pathogenic microorganisms. The nanoparticle synthesis method used in this study was reliable, facile, rapid, cost-effective and ecofriendly. The AgNPs exhibited the highest absorbance at 423 nm. The TEM image expressed spherical shape of AgNPs and the size of synthesized AgNPs was 7-22 nm. The selected area diffraction (SAED) pattern and XRD spectrum revealed the crystalline structure of AgNPs. The results of FTIR analysis disclosed the functional groups responsible for the reduction of silver ion to metal nanoparticles. The biosynthesized AgNPs showed strong anti-microbial activity against drug-resistant pathogenic microorganisms. Moreover, Escherichia coli and Staphylococcus aureus were used to explore the antibacterial mechanisms of biosynthesized AgNPs. Minimal inhibitory concentrations (MICs) of E. coli and S. aureus were 6.25 μg/mL and 50 μg/mL, respectively and minimum bactericidal concentrations (MBCs) of E. coli and S. aureus were 25 μg/mL and 100 μg/mL, respectively. Results exhibited that biosynthesized AgNPs caused morphological changes and injured the membrane integrity of strains E. coli and S. aureus. The AgNPs synthesized by Sphingobium sp. MAH-11 may serve as a potent antimicrobial agent for many therapeutic applications.
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Affiliation(s)
- Shahina Akter
- Department of Food Science and Biotechnology, College of BioNano Technology, Gachon University, Seongnam, Republic of Korea
| | - Md Amdadul Huq
- Department of Food and Nutrition, College of Biotechnology and Natural Resource, Chung-Ang University, Anseong, Republic of Korea
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Paria K, Paul D, Chowdhury T, Pyne S, Chakraborty R, Mandal SM. Synergy of melanin and vitamin-D may play a fundamental role in preventing SARS-CoV-2 infections and halt COVID-19 by inactivating furin protease. TRANSLATIONAL MEDICINE COMMUNICATIONS 2020; 5:21. [PMID: 33169107 PMCID: PMC7642579 DOI: 10.1186/s41231-020-00073-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 10/25/2020] [Indexed: 05/28/2023]
Abstract
Since the birth of Christ, in these 2019 years, the man on earth has never experienced a survival challenge from any acellular protist compared to SARS-CoV-2. No specific drugs yet been approved. The host immunity is the only alternative to prevent and or reduce the infection and mortality rate as well. Here, a novel mechanism of melanin mediated host immunity is proposed having potent biotechnological prospects in health care management of COVID-19. Vitamin D is known to enhance the rate of melanin synthesis; and this may concurrently regulate the expression of furin expression. In silico analyses have revealed that the intermediates of melanin are capable of binding strongly with the active site of furin protease. On the other hand, furin expression is negatively regulated via 1-α-hydroxylase (CYP27B1), that belongs to vitamin-D pathway and controls cellular calcium levels. Here, we have envisaged the availability of biological melanin and elucidated the bio-medical potential. Thus, we propose a possible synergistic application of melanin and the enzyme CYP27B1 (regulates vitamin D biosynthesis) as a novel strategy to prevent viral entry through the inactivation of furin protease and aid in boosting our immunity at the cellular and humoral levels.
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Affiliation(s)
- Kishalay Paria
- Department of Zoology, Vidyasagar University, Midnapore, West Bengal India
| | - Debarati Paul
- Amity Institute of Biotechnology, Amity University, Noida, Sector 125 201313 India
| | - Trinath Chowdhury
- Central Research Facility, Department of Agricultural and Food Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302 India
| | - Smritikana Pyne
- Central Research Facility, Department of Agricultural and Food Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302 India
| | - Ranadhir Chakraborty
- Department of Biotechnology, University of North Bengal, Raja Rammohanpur, Darjeeling, West Bengal 734013 India
| | - Santi M. Mandal
- Central Research Facility, Department of Agricultural and Food Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302 India
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58
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Interactions of “de novo” designed peptides with bacterial membranes: Implications in the antimicrobial activity. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1862:183443. [DOI: 10.1016/j.bbamem.2020.183443] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 08/07/2020] [Accepted: 08/10/2020] [Indexed: 11/19/2022]
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59
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Antibacterial Effects and Mechanism of Mandarin ( Citrus reticulata L.) Essential Oil against Staphylococcus aureus. Molecules 2020; 25:molecules25214956. [PMID: 33114746 PMCID: PMC7663016 DOI: 10.3390/molecules25214956] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 10/22/2020] [Accepted: 10/22/2020] [Indexed: 01/10/2023] Open
Abstract
Staphylococcus aureus (S. aureus) creates an array of challenges for the food industry and causes foodborne diseases in people, largely due to its strong antibiotic resistance. Mandarin (Citrus reticulata L.) essential oil (MEO) is recognized as a natural and safe preservative; however, the antibacterial effects and mechanism of MEO to combat S. aureus are not yet clearly understood. This study will examine the inhibitory effects of MEO against S. aureus and explore the antibacterial mechanism thereof from the perspective of membrane destruction. The antibacterial activity of MEO on planktonic S. aureus was examined to determine the minimal inhibitory concentration (MIC). Scanning electron microscope (SEM) images revealed the direct impacts of MEO treatment on the cell structure of S. aureus. The cell membrane was observed to be depolarized, the determination of extracellular nucleic acids, proteins and intracellular adenosine triphosphate (ATP) confirmed the increased permeability of the cell membrane, its integrity was destroyed and the cellular constituents had leaked. These results, thus, provided conclusive evidence that MEO constrains the growth of planktonic S. aureus by affecting the permeability and integrity of its cell membrane. Our study provides a basis for the further development and utilization of MEO as a natural antibacterial agent in the food industry.
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60
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Biological activities of melanin pigment extracted from Bombyx mori gut-associated yeast Cryptococcus rajasthanensis KY627764. World J Microbiol Biotechnol 2020; 36:159. [PMID: 32974753 DOI: 10.1007/s11274-020-02924-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 09/03/2020] [Indexed: 12/22/2022]
Abstract
Melanin pigment has been produced and extracted from a wide variety of living forms ranging from microorganisms to higher organisms. Owing to the therapeutic nature of the pigment, various microbial populations have been explored for its production. Hence, we isolated a melanin producing yeast from the insect Bombyx mori gut microflora and identified it as Cryptococcus rajasthanensis based on the molecular characterization. The isolated yeast produced enhanced melanin pigment when cultured in the minimal L-tyrosine broth as compared to the Saboraud medium. The pigment was extracted and characterized as melanin based on UV-Visible spectroscopy, FTIR (Fourier-transform infrared) spectroscopy and 1H NMR (Nuclear magnetic resonance). The melanin pigment was evaluated as a potent bioactive molecule with bioactivity like antimicrobial, antioxidant, anti-inflammatory, and anticancer activity that describes the therapeutic nature of the extracted melanin pigment. Distinct from the biologically active role the melanin pigment isolated from the yeast, the Cryptococcus extract also exhibited killer toxin activity against the pathogenic yeast Candida albicans.
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Bi J, Tian C, Jiang J, Zhang GL, Hao H, Hou HM. Antibacterial Activity and Potential Application in Food Packaging of Peptides Derived from Turbot Viscera Hydrolysate. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:9968-9977. [PMID: 32841003 DOI: 10.1021/acs.jafc.0c03146] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
As a good choice for food preservation, antimicrobial peptides (AMPs) have received much attention in recent years. In this paper, peptides derived from the turbot viscera hydrolysate were identified by ultraperformance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS/MS), and the physicochemical properties and structural characteristics were analyzed by in silico tools. Furthermore, three cationic peptides with potential hydrophobicity and amphipathy were synthesized; their cytotoxicity, hemolysis, and antibacterial activities were investigated. In particular, Sm-A1 (GITDLRGMLKRLKKMK), a peptide with 16 amino acids, showed an outstanding antibacterial activity against both Gram-positive and Gram-negative bacteria by damaging the cell membrane integrity. Moreover, Sm-A1 was successfully loaded into hydroxyl-rich poly(vinyl alcohol) (PVA)/chitosan (CS) hydrogel to improve the antibacterial activity and biofilm inhibition effect. PVA/CS+7.5‰ Sm-A1 hydrogel can satisfactorily protect the salmon muscle from the microbiological contamination and texture deterioration.
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Affiliation(s)
- Jingran Bi
- School of Food Science and Technology, Dalian Polytechnic University, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
- Liaoning Key Lab for Aquatic Processing Quality and Safety, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
| | - Chuan Tian
- School of Food Science and Technology, Dalian Polytechnic University, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
- Liaoning Key Lab for Aquatic Processing Quality and Safety, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
| | - Jinghui Jiang
- School of Food Science and Technology, Dalian Polytechnic University, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
- Liaoning Key Lab for Aquatic Processing Quality and Safety, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
| | - Gong-Liang Zhang
- School of Food Science and Technology, Dalian Polytechnic University, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
- Liaoning Key Lab for Aquatic Processing Quality and Safety, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
| | - Hongshun Hao
- School of Food Science and Technology, Dalian Polytechnic University, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
- Liaoning Key Lab for Aquatic Processing Quality and Safety, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
| | - Hong-Man Hou
- School of Food Science and Technology, Dalian Polytechnic University, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
- Liaoning Key Lab for Aquatic Processing Quality and Safety, No. 1, Qinggongyuan, Ganjingzi District, Dalian, Liaoning 116034, People's Republic of China
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Huang J, Yang L, Zou Y, Luo S, Wang X, Liang Y, Du Y, Feng R, Wei Q. Antibacterial activity and mechanism of three isomeric terpineols of Cinnamomum longepaniculatum leaf oil. Folia Microbiol (Praha) 2020; 66:59-67. [PMID: 32895862 DOI: 10.1007/s12223-020-00818-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 08/30/2020] [Indexed: 11/30/2022]
Abstract
α-Terpineol, terpinen-4-ol, and δ-terpineol, isomers of terpineol, are among the compounds that give Cinnamomum longepaniculatum leaf oil its distinguished pleasant smell. The objective of this study was to evaluate the antimicrobial activity of these three isomeric terpineols. The determination of antibacterial activity was based on the minimum inhibition concentration (MIC) and minimum bactericide concentration (MBC). Changes in time-kill curve, alkaline phosphatase (AKP), UV-absorbing material, membrane potential, and scanning electron microscopy (SEM) were measured to elucidate the possible antimicrobial mechanism. α-Terpineol, terpinen-4-ol, and δ-terpineol demonstrated good inhibitory effects against several gram-negative bacteria, particularly Shigella flexneri. MIC and MBC of α-terpineol and terpinen-4-ol were similar (0.766 mg/mL and 1.531 mg/mL, respectively) for S. flexneri, while the MIC and MBC values of δ-terpineol were 0.780 mg/mL and 3.125 mg/mL, respectively. Time-kill curves showed that the antibacterial activities of the tested compounds were in a concentration-dependent manner. Release of nucleic acids and proteins along with a decrease in membrane potential proved that α-terpineol, terpinen-4-ol, and δ-terpineol could increase the membrane permeability of Shigella flexneri. Additionally, the release of AKP suggested that the cell wall was destroyed. SEM analysis further confirmed that S. flexneri cell membranes were damaged by α-terpineol, terpinen-4-ol, and δ-terpineol. Our research suggests that these three isomeric terpineols have the potential of being used as natural antibacterial agents by destroying the cell membrane and wall, resulting in cell death. However, the specific antibacterial activity differences need further investigation.
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Affiliation(s)
- Jinfeng Huang
- Key Lab of Aromatic Plant Resources Exploitation and Utilization in Sichuan Higher Education, Yibin University, Yibin, 644000, People's Republic of China
- College of Food and Biotechnology, Xihua University, Chengdu, 610039, People's Republic of China
| | - Liyan Yang
- Key Lab of Aromatic Plant Resources Exploitation and Utilization in Sichuan Higher Education, Yibin University, Yibin, 644000, People's Republic of China
| | - Yue Zou
- Key Lab of Aromatic Plant Resources Exploitation and Utilization in Sichuan Higher Education, Yibin University, Yibin, 644000, People's Republic of China
- College of Food and Biotechnology, Xihua University, Chengdu, 610039, People's Republic of China
| | - Sican Luo
- Key Lab of Aromatic Plant Resources Exploitation and Utilization in Sichuan Higher Education, Yibin University, Yibin, 644000, People's Republic of China
| | - Xin Wang
- Key Lab of Aromatic Plant Resources Exploitation and Utilization in Sichuan Higher Education, Yibin University, Yibin, 644000, People's Republic of China
| | - Yujuan Liang
- Key Lab of Aromatic Plant Resources Exploitation and Utilization in Sichuan Higher Education, Yibin University, Yibin, 644000, People's Republic of China
| | - Yonghua Du
- Key Lab of Aromatic Plant Resources Exploitation and Utilization in Sichuan Higher Education, Yibin University, Yibin, 644000, People's Republic of China
| | - Ruizhang Feng
- Key Lab of Aromatic Plant Resources Exploitation and Utilization in Sichuan Higher Education, Yibin University, Yibin, 644000, People's Republic of China
| | - Qin Wei
- Key Lab of Aromatic Plant Resources Exploitation and Utilization in Sichuan Higher Education, Yibin University, Yibin, 644000, People's Republic of China.
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(-)-Tetrahydroberberrubine∙acetate accelerates antioxidant potential and inhibits food associated Bacillus cereus in rice. Food Chem 2020; 339:127902. [PMID: 32920304 DOI: 10.1016/j.foodchem.2020.127902] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 07/28/2020] [Accepted: 08/18/2020] [Indexed: 12/17/2022]
Abstract
A protoberberine alkaloid, (-)-tetrahydroberberrubine∙acetate (THBA) was assessed for its antioxidant potential and ability to inhibit the growth of a food hazard bacterium Bacillus cereus in vitro and in situ. THBA displayed significant and dose-dependent cellular antioxidant potential against hydrogen peroxide-induced oxidative stress in NIH 3T3 fibroblast cells and decreased the ROS levels as well as increased the expression levels of SOD1 and SOD2 enzymes. The inhibitory spectrum of THBA confirmed its mechanistic role in the disruption of the membrane integrity of B. cereus as evidenced by the results of time-inactivation, cell membrane integrity, NPN membrane uptake, membrane potential, and electron microscopy analyses. Moreover, THBA inhibited biofilm formation by B. cereus and disrupted pre-established biofilms on a glass surface. Furthermore, THBA was also able to inhibit B. cereus in raw rice with a significant amount of reduction in CFU counts, suggesting its potential role as a natural antioxidant and antimicrobial agent.
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64
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Fabrication linalool-functionalized hollow mesoporous silica spheres nanoparticles for efficiently enhance bactericidal activity. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.12.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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65
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Liu W, Zhang Y, You W, Su J, Yu S, Dai T, Huang Y, Chen X, Song X, Chen Z. Near-infrared-excited upconversion photodynamic therapy of extensively drug-resistant Acinetobacter baumannii based on lanthanide nanoparticles. NANOSCALE 2020; 12:13948-13957. [PMID: 32396588 DOI: 10.1039/d0nr01073a] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Extensively drug-resistant Acinetobacter baumannii (XDR-AB) has raised considerable concerns due to its mortal damage to humans and its high transmission rate of infections in hospitals. However, current antibiotics not only show poor anti-infection effects in vivo but also frequently cause high nephrotoxicity and neurotoxicity. Herein, we report a near-infrared (NIR) light-initiated antimicrobial photodynamic therapy (aPDT) to effectively treat in vivo XDR-AB infections based on photosensitizer (PS) loaded upconversion nanoparticles (UCNPs, LiYF4:Yb/Er). Such nanoagents feature robust NIR triggered UC luminescence and high-efficiency energy transfer from UCNPs to the loaded PS, thereby allowing NIR-triggered generation of reactive oxygen species (ROS) for destroying the bacterial cell membrane. This strategy permits a high antibacterial activity against XDR-AB, resulting in a decline of 4.72 log10 in viability at a dose of 50 μg mL-1 UCNPs-PVP-RB with 980 nm laser irradiation (1 W cm-2). More significantly, we can achieve excellent therapeutic efficacy against deep-tissue (about 5 mm) XDR-AB infections without causing any side effects in the murine model. In brief, such NIR-activated aPDT may open up new avenues for treating various deep-tissue intractable infections.
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Affiliation(s)
- Wenzhen Liu
- State Key Laboratory of Structural Chemistry, CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian College, University of Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
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Kwiatkowski P, Wojciuk B, Wojciechowska-Koszko I, Łopusiewicz Ł, Grygorcewicz B, Pruss A, Sienkiewicz M, Fijałkowski K, Kowalczyk E, Dołęgowska B. Innate Immune Response against Staphylococcus aureus Preincubated with Subinhibitory Concentration of trans-Anethole. Int J Mol Sci 2020; 21:ijms21114178. [PMID: 32545315 PMCID: PMC7312609 DOI: 10.3390/ijms21114178] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 06/07/2020] [Accepted: 06/09/2020] [Indexed: 11/16/2022] Open
Abstract
The study aimed to analyze morphological and functional changes of Staphylococcus aureus cells due to trans-anethole (a terpenoid and the major constituent of fennel, anise, or star anise essential oils) exposition, and their consequences for human neutrophils phagocytic activity as well as IL-8 production (recognized as the major chemoattractant). The investigation included the evaluation of changes occurring in S. aureus cultures, i.e., staphyloxanthin production, antioxidant activities, cell size distribution, and cells composition as a result of incubation with trans-anethole. It was found that the presence of trans-anethole in the culture medium reduced the level of staphyloxanthin production, as well as decreased antioxidant activities. Furthermore, trans-anethole-treated cells were characterized by larger size and a tendency to diffuse in comparison to the non-treated cells. Several cell components, such as phospholipids and peptidoglycan, were found remarkably elevated in the cultures treated with trans-anethole. As a result of the aforementioned cellular changes, the bacteria were phagocytized by neutrophils more efficiently (ingestion and parameters associated with killing activity were at a higher level as compared to the control system). Additionally, IL-8 production was at a higher level for trans-anethole modified bacteria. Our results suggest that trans-anethole represents a promising measure in combating severe staphylococcal infections, which has an important translational potential for clinical applications.
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Affiliation(s)
- Paweł Kwiatkowski
- Department of Diagnostic Immunology, Chair of Microbiology, Immunology and Laboratory Medicine, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland; (B.W.); (I.W.-K.)
- Correspondence: ; Tel.: +48-91-466-1659
| | - Bartosz Wojciuk
- Department of Diagnostic Immunology, Chair of Microbiology, Immunology and Laboratory Medicine, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland; (B.W.); (I.W.-K.)
| | - Iwona Wojciechowska-Koszko
- Department of Diagnostic Immunology, Chair of Microbiology, Immunology and Laboratory Medicine, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland; (B.W.); (I.W.-K.)
| | - Łukasz Łopusiewicz
- Center of Bioimmobilisation and Innovative Packaging Materials, Faculty of Food Sciences and Fisheries, West Pomeranian University of Technology Szczecin, 71-270 Szczecin, Poland;
| | - Bartłomiej Grygorcewicz
- Department of Laboratory Medicine, Chair of Microbiology, Immunology and Laboratory Medicine, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland; (B.G.); (A.P.); (B.D.)
| | - Agata Pruss
- Department of Laboratory Medicine, Chair of Microbiology, Immunology and Laboratory Medicine, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland; (B.G.); (A.P.); (B.D.)
| | - Monika Sienkiewicz
- Department of Allergology and Respiratory Rehabilitation, Medical University of Łódź, 90-752 Łódź, Poland;
| | - Karol Fijałkowski
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology Szczecin, 70-311 Szczecin, Poland;
| | - Edward Kowalczyk
- Department of Pharmacology and Toxicology, Medical University of Łódź, 90-752 Łódź, Poland;
| | - Barbara Dołęgowska
- Department of Laboratory Medicine, Chair of Microbiology, Immunology and Laboratory Medicine, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland; (B.G.); (A.P.); (B.D.)
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67
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Comparative studies on measurement of membrane potential of bacterial cells treated with ZnO nanoparticles by Spectrofluorometry, fluorescence microscopy and flowcytometry. J Microbiol Methods 2020; 173:105920. [DOI: 10.1016/j.mimet.2020.105920] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Revised: 04/13/2020] [Accepted: 04/13/2020] [Indexed: 11/17/2022]
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68
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69
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Antimicrobial effects and membrane damage mechanism of blueberry (Vaccinium corymbosum L.) extract against Vibrio parahaemolyticus. Food Control 2020. [DOI: 10.1016/j.foodcont.2019.107020] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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70
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Antibacterial activity and action mechanism of microencapsulated dodecyl gallate with methyl-β-cyclodextrin. Food Control 2020. [DOI: 10.1016/j.foodcont.2019.106953] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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71
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72
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Antibacterial activity and mechanism of lactobionic acid against Pseudomonas fluorescens and Methicillin-resistant Staphylococcus aureus and its application on whole milk. Food Control 2020. [DOI: 10.1016/j.foodcont.2019.106876] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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73
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Liu X, Cai J, Chen H, Zhong Q, Hou Y, Chen W, Chen W. Antibacterial activity and mechanism of linalool against Pseudomonas aeruginosa. Microb Pathog 2020; 141:103980. [PMID: 31962183 DOI: 10.1016/j.micpath.2020.103980] [Citation(s) in RCA: 96] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 01/12/2020] [Accepted: 01/13/2020] [Indexed: 12/19/2022]
Abstract
The purpose of this study was to evaluate the antibacterial activity and mechanism of linalool against Pseudomonas aeruginosa. The determination of antibacterial activity was based on the minimum inhibitory concentration (MIC) and the minimum bactericide concentration (MBC). Further, the antibacterial mechanism was explored by a growth curve assay, scanning electron microscopy (SEM), cell membrane permeability, membrane potential and respiratory chain dehydrogenase determination. The MIC and the MBC of linalool were 431 μg/mL and 862 μg/mL, respectively. The growth curve assay showed that the growth of P. aeruginosa was inhibited. The results of SEM revealed that linalool disrupted the normal morphology of the cell. The release of nucleic acids as well as the decrease in the membrane potential proved that the membrane integrity of P. aeruginosa was destroyed. Moreover, the respiratory chain was damaged by respiratory chain dehydrogenase determination as the absorbance at 490 nm decreased. This research suggested that it was possible for linalool to become a preservative of food by destroying the cell membrane, resulting in cell death.
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Affiliation(s)
- Xue Liu
- College of Food Sciences & Engineering, Hainan University, 58 People Road, Haikou, 570228, PR China
| | - Jiaxin Cai
- College of Food Sciences & Engineering, Hainan University, 58 People Road, Haikou, 570228, PR China
| | - Haiming Chen
- College of Food Sciences & Engineering, Hainan University, 58 People Road, Haikou, 570228, PR China
| | - Qiuping Zhong
- College of Food Sciences & Engineering, Hainan University, 58 People Road, Haikou, 570228, PR China
| | - Yaqi Hou
- College of Food Sciences & Engineering, Hainan University, 58 People Road, Haikou, 570228, PR China
| | - Weijun Chen
- College of Food Sciences & Engineering, Hainan University, 58 People Road, Haikou, 570228, PR China; Chunguang Agro-product Processing Institute, Wenchang 571333, PR China.
| | - Wenxue Chen
- College of Food Sciences & Engineering, Hainan University, 58 People Road, Haikou, 570228, PR China.
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74
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Shams S, Ahmad W, Memon AH, Shams S, Wei Y, Yuan Q, Liang H. Cu/H3BTC MOF as a potential antibacterial therapeutic agent against Staphylococcus aureus and Escherichia coli. NEW J CHEM 2020. [DOI: 10.1039/d0nj04120c] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The objective of this study was to design a more effective antibacterial agent to overcome the problem of fast-growing bacterial resistance.
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Affiliation(s)
- Saira Shams
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Waqas Ahmad
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Amjad Hussain Memon
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Sumaira Shams
- Department of Zoology
- Abdul Wali Khan University
- Mardan
- Pakistan
| | - Yun Wei
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Qipeng Yuan
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Hao Liang
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
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75
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The Influence of Essential Oil Compounds on Antibacterial Activity of Mupirocin-Susceptible and Induced Low-Level Mupirocin-Resistant MRSA Strains. Molecules 2019; 24:molecules24173105. [PMID: 31461850 PMCID: PMC6749447 DOI: 10.3390/molecules24173105] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 08/14/2019] [Accepted: 08/24/2019] [Indexed: 12/21/2022] Open
Abstract
Because of the bacterial drug resistance development, it is reasonable to investigate chemical compounds capable of preventing the spread of resistance to mupirocin (MUP), commonly used in staphylococcal eradication. The objective of the study was to verify the influence of essential oil compounds (EOCs) on the antibacterial activity of MUP against mupirocin-susceptible (MupS) and induced low-level mupirocin-resistant (MupRL) methicillin-resistant Staphylococcus aureus (MRSA) strains. The following parameters were examined: MRSAMupS and MRSAMupRL susceptibility to EOCs (1,8-cineole, eugenol, carvacrol, linalool, (-)-menthone, linalyl acetate, and trans-anethole), the bacterial cell size distribution, and chemical composition by the use of Fourier Transform Infrared Spectroscopy (FTIR) and Raman spectroscopies. The MRSAMupS and MRSAMupRL strains were susceptible to all tested EOCs. 1,8-cineole and (-)-menthone showed synergistic activity against MRSAMupS in combination with mupirocin, whereas 1,8-cineole exhibited synergistic activity against MRSAMupRL as well. In-depth analysis showed that both MRSAMupS and MRSAMupRL displayed similar distributions of the bacterial cell size. The FTIR and Raman spectra of the MRSAMupS and MRSAMupRL strains showed differences in some regions. New bands in the MRSAMupRL Raman spectrum were observed. It was concluded that the use of 1,8-cineole in combination with mupirocin can increase the mupirocin activity against the MRSAMupS and MRSAMupRL strains.
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76
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Nampuak C, Tongkhao K. Okra mucilage powder: a novel functional ingredient with antioxidant activity and antibacterial mode of action revealed by scanning and transmission electron microscopy. Int J Food Sci Technol 2019. [DOI: 10.1111/ijfs.14308] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Chatmanee Nampuak
- Department of Food Science and Technology, Faculty of Agro‐Industry Kasetsart University Bangkok 10900 Thailand
| | - Kullanart Tongkhao
- Department of Food Science and Technology, Faculty of Agro‐Industry Kasetsart University Bangkok 10900 Thailand
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77
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78
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Zhao J, Zhao G, Liu Y. Antibacterial activity of a hexahydro‐β‐acids/methyl‐β‐cyclodextrin inclusion complex against bacteria related to foodborne illness. J Food Saf 2019. [DOI: 10.1111/jfs.12678] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jiuyang Zhao
- Key Laboratory of Coal Cleaning Conversion and Chemical Engineering Process, Xinjiang Uyghur Autonomous RegionCollege of Chemistry and Chemical Engineering, Xinjiang University Urumqi China
| | - Guanyu Zhao
- Key Laboratory of Coal Cleaning Conversion and Chemical Engineering Process, Xinjiang Uyghur Autonomous RegionCollege of Chemistry and Chemical Engineering, Xinjiang University Urumqi China
| | - Yumei Liu
- Key Laboratory of Coal Cleaning Conversion and Chemical Engineering Process, Xinjiang Uyghur Autonomous RegionCollege of Chemistry and Chemical Engineering, Xinjiang University Urumqi China
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79
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80
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Saito H, Sakakibara Y, Sakata A, Kurashige R, Murakami D, Kageshima H, Saito A, Miyazaki Y. Antibacterial activity of lysozyme-chitosan oligosaccharide conjugates (LYZOX) against Pseudomonas aeruginosa, Acinetobacter baumannii and Methicillin-resistant Staphylococcus aureus. PLoS One 2019; 14:e0217504. [PMID: 31136634 PMCID: PMC6538184 DOI: 10.1371/journal.pone.0217504] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 05/12/2019] [Indexed: 11/19/2022] Open
Abstract
The recent emergence of antibiotic-resistant bacteria requires the development of new antibiotics or new agents capable of enhancing antibiotic activity. This study evaluated the antibacterial activity of lysozyme-chitosan oligosaccharide conjugates (LYZOX) against Pseudomonas aeruginosa, Acinetobacter baumannii and methicillin-resistant Staphylococcus aureus (MRSA), which should resolve the problem of antibiotic-resistant bacteria. Bactericidal tests showed that LYZOX killed 50% more P. aeruginosa (NBRC 13275), A. baumannii and MRSA than the control treatment after 60 min. In addition, LYZOX was shown to inhibit the growth of P. aeruginosa (NBRC 13275 and PAO1), A. baumannii and MRSA better than its components. To elucidate the antibacterial mechanism of LYZOX, we performed cell membrane integrity assays, N-phenyl-1-naphthylamine assays, 2-nitrophenyl β-D-galactopyranoside assays and confocal laser scanning microscopy. These results showed that LYZOX affected bacterial cell walls and increased the permeability of the outer membrane and the plasma membrane. Furthermore, each type of bacteria treated with LYZOX was observed by electron microscopy. Electron micrographs revealed that these bacteria had the morphological features of both lysozyme-treated and chitosan oligosaccharide-treated bacteria and that LYZOX destroyed bacterial cell walls, which caused the release of intracellular contents from cells. An acquired drug resistance test revealed that these bacteria were not able to acquire resistance to LYZOX. The hemolytic toxicity test demonstrated the low hemolytic activity of LYZOX. In conclusion, LYZOX exhibited antibacterial activity and low drug resistance in the presence of P. aeruginosa, A. baumannii and MRSA and showed low hemolytic toxicity. LYZOX affected bacterial membranes, leading to membrane disruption and the release of intracellular contents and consequent bacterial cell death. LYZOX may serve as a novel candidate drug that could be used for the control of refractory infections.
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Affiliation(s)
- Hiroaki Saito
- Department of Respiratory Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yumi Sakakibara
- Department of Respiratory Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Ayumi Sakata
- Department of Respiratory Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Rie Kurashige
- Department of Respiratory Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Daisuke Murakami
- Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | | | - Akira Saito
- Wako Filter Technology Co., Ltd, Tokyo, Japan
| | - Yasunari Miyazaki
- Department of Respiratory Medicine, Tokyo Medical and Dental University, Tokyo, Japan
- * E-mail:
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81
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Cao J, Fu H, Gao L, Zheng Y. Antibacterial activity and mechanism of lactobionic acid against Staphylococcus aureus. Folia Microbiol (Praha) 2019; 64:899-906. [PMID: 30993549 DOI: 10.1007/s12223-019-00705-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 04/01/2019] [Indexed: 12/26/2022]
Abstract
Lactobionic acid (LBA) is a newly identified natural polyhydroxy acid that is widely used in the food industry. In this study, the antibacterial effects and underlying mechanism of action of LBA against Staphylococcus aureus were investigated. LBA exhibited significant antibacterial activity against S. aureus with a determination of the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of 15 mg/mL and 50 mg/mL, respectively. The Growth curves indicated that LBA directly inhibited the growth of S. aureus. Moreover, LBA induced the leakage of alkaline phosphatase and nucleotides in the culture medium, indicating damage to the integrity of the S. aureus cell wall membrane, which was confirmed by transmission electron microscopy observations. The relative electric conductivity measurements indicated that LBA changed the cell membrane permeability. The preservation effect of LBA was evaluated by quantifying the total number of colonies, total volatile base nitrogen (TVB-N), and thiobarbituric acid reactive substances (TBARS). Overall, these results revealed that LBA exerts its antibacterial activity by breaking down the structure of the bacterial cell wall and membrane, thereby releasing the cellular contents as well as inhibiting protein synthesis, which ultimately lead to cell death. The total number of colonies, the TVB-N value, and the TBARS of cold fresh meat treated with preservatives were significantly lower than those of the control group (P < 0.05). With these antibacterial characteristics, LBA has potential to be used as a safe food additive in the food industry.
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Affiliation(s)
- Jiarong Cao
- College of Food Science, Shenyang Agricultural University, Shenyang, 110161, China
| | - Hongjie Fu
- College of Food Science, Shenyang Agricultural University, Shenyang, 110161, China
| | - Lihong Gao
- College of Food Science, Shenyang Agricultural University, Shenyang, 110161, China
| | - Yan Zheng
- College of Food Science, Shenyang Agricultural University, Shenyang, 110161, China.
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82
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Du J, Hu Z, Yu Z, Li H, Pan J, Zhao D, Bai Y. Antibacterial activity of a novel Forsythia suspensa fruit mediated green silver nanoparticles against food-borne pathogens and mechanisms investigation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 102:247-253. [PMID: 31146997 DOI: 10.1016/j.msec.2019.04.031] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 04/02/2019] [Accepted: 04/12/2019] [Indexed: 12/13/2022]
Abstract
In the present study, novel silver nanoparticles (AgNPs) were synthesized via a green method by using Forsythia suspensa fruit water extract. The synthesized AgNPs showed antibacterial activities against all the tested food-borne pathogens, including Listeria monocytogenes, Vibrio parahaemolyticus, Escherichia coli O157:H7, Staphylococcus aureus, Pseudomonas aeruginosa and Salmonella typhimurium. Furthermore, the S. aureus and V. parahaemolyticus were introduced as Gram-positive and Gram-negative model strains to explore the antibacterial mechanism of AgNPs. Minimal inhibitory concentrations (MICs) of V. parahaemolyticus and S. aureus were 6.25 μg/mL and 50 μg/mL, respectively, and the minimum bactericidal concentrations (MBCs) of V. parahaemolyticus and S. aureus were 12.5 μg/mL and 100 μg/mL, respectively. Results indicated that the AgNPs caused morphological alterations and damaged the membrane integrity of strains S. aureus and V. parahaemolyticus. In addition, the AgNPs induced the release of nucleic acids of V. parahaemolyticus cells, resulting in disrupting of cells reproduction.
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Affiliation(s)
- Juan Du
- College of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China; Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou 450001, China; Henan collaborative Innovation Center of Food Production and Safety, Zhengzhou 450001, China
| | - Zheyuan Hu
- College of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Ziyue Yu
- College of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Hailong Li
- College of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China; Food Production and Supply Management, Food Center, Royal Agriculture University, Cirencester, Gloucestershire GL76JS, United Kingdom
| | - Jie Pan
- College of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Dianbo Zhao
- College of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China; Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou 450001, China; Henan collaborative Innovation Center of Food Production and Safety, Zhengzhou 450001, China
| | - Yanhong Bai
- College of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China; Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou 450001, China; Henan collaborative Innovation Center of Food Production and Safety, Zhengzhou 450001, China.
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83
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Fang Z, Xu L, Lin Y, Cai X, Wang S. The preservative potential of Octopus scraps peptides−Zinc chelate against Staphylococcus aureus: Its fabrication, antibacterial activity and action mode. Food Control 2019. [DOI: 10.1016/j.foodcont.2018.11.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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84
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Wang H, Tang W, Zhang R, Ding S. Analysis of enzyme activity, antibacterial activity, antiparasitic activity and physico-chemical stability of skin mucus derived from Amphiprion clarkii. FISH & SHELLFISH IMMUNOLOGY 2019; 86:653-661. [PMID: 30502467 DOI: 10.1016/j.fsi.2018.11.066] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 11/25/2018] [Accepted: 11/27/2018] [Indexed: 05/20/2023]
Abstract
Recently, mucosal surfaces, especially fish skin and its secreted mucus, have attracted significant interest from immunologists. Amphiprion clarkii, a member of the family Pomacentridae, lives symbiosis with sea anemones and has a good resistance to common seawater bacterial diseases and parasites owing to the protection from its abundant skin mucus. In the present work, the activity of immune-related enzymes (lysozyme, protease, antiprotease, cathepsin B, alkaline phosphatase and peroxidase), the antibacterial activity against two Gram-positive bacteria and five Gram-negative bacteria, the antiparasitic activity against the pathogen of marine white spot disease (Cryptocaryon irritans theronts) and the physico-chemical stability (to pH and heat) of the skin mucus of A. clarkii were analysed. The results showed that the levels of lysozyme and peroxidase were very similar (from 2 to 4 U mg-1 protein). However, cathepsin B was detected of 63.32 U mg-1 protein and alkaline phosphatase was only 0.12 U mg-1 protein. Moreover, protease showed a higher percentage of activity than antiprotease. A. clarkii skin mucus showed a strong antibacterial activity against Gram-negative bacteria, particularly against Aeromonas hydrophila and Vibrio parahaemolyticus but showed no effect on Gram-positive bacteria at the tested concentrations. The bactericidal activity functioned within a short time in a distinct time- and dose-dependent manner. SEM showed that after treated with A. clarkii skin mucus, the V. parahaemolyticus cells distorted and piled together, and the filaments appeared and became into cotton-shaped or quasi-honeycomb texture to adhere cells. Meanwhile, A. clarkii skin mucus showed an apparent antiparasitic activity against C. irritans theronts with a distinct dose- and time-dependent relationship. LM and SEM observation showed that after treated with skin mucus, the theronts quickly stopped their swimming and cilia movement, cells became rounded, cilia shed, small bubbles formed on the surface, cell nucleolus enlarged, cytoskeleton deformed, cell membranes ruptured and cell content leaked out. Antibacterial activity was not affected by 30-90 °C heat treatment but was slightly suppressed by 100 °C. In the pH treatment groups, antibacterial activity was not affected by the moderate pH treatment of 5.0-8.0, but slightly suppressed by weak acid and weak base. Therefore, we speculated that the skin mucus of A. clarkii might be a potential source of novel antibacterial and antiparasitic components for fish or human health-related applications. This study broadened our understanding of the role of skin mucus in the innate immune system and provided a basis for the further isolation and purification of active substances.
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Affiliation(s)
- Huan Wang
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, Fujian Province, China
| | - Wei Tang
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, Fujian Province, China
| | - Rui Zhang
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, Fujian Province, China
| | - Shaoxiong Ding
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, Fujian Province, China; Marine Biodiversity and Global Change Research Center, College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, Fujian Province, China.
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85
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Antibacterial activity and mechanism of a laccase-catalyzed chitosan–gallic acid derivative against Escherichia coli and Staphylococcus aureus. Food Control 2019. [DOI: 10.1016/j.foodcont.2018.09.021] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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86
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Bae WY, Kim HY, Kim KT, Paik HD. Inhibitory effects of Inula britannica extract fermented by Lactobacillus plantarum KCCM 11613P on coagulase activity and growth of Staphylococcus aureus including methicillin-resistant strains. J Food Biochem 2019; 43:e12785. [PMID: 31353594 DOI: 10.1111/jfbc.12785] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 01/04/2019] [Accepted: 01/07/2019] [Indexed: 11/28/2022]
Abstract
The aim of this study was to evaluate the antimicrobial efficacy of fermented Inula britannica extract (FIBE) against Staphylococcus aureus strains including methicillin-resistant S. aureus (MRSA). I. britannica extract was fermented by Lactobacillus plantarum KCCM 11613P, and the pathogenicity of S. aureus strains was determined via assessment of coagulase, DNase, and hemolytic activities. Epicatechin concentration increased from 4.38 to 6.05 μg/mg during fermentation (p < 0.01). FIBE treatment inhibited coagulase release from S. aureus to levels below the inhibitory concentration. FIBE promoted the release of intracellular nucleic acids and N-phenyl-1-naphthylamine absorption. In three S. aureus strains, damaged cells exhibited 21.58, 16.79, and 17.65% decreases in membrane potential induced by cell membrane depolarization, respectively (p < 0.05). Upon FIBE treatment in culture, the minimum inhibitory concentration of FIBE exerted a bacteriostatic effect. In conclusion, FIBE possesses antimicrobial properties, including inhibition of virulence factors, damage to cell membranes, and inhibition of bacterial growth. PRACTICAL APPLICATIONS: Methicillin-resistant Staphylococcus aureus (MRSA) is a serious concern in hospitals because of its known antibiotic resistance. Vancomycin and tigecycline are used for treating MRSA, but the appearance of vancomycin-intermediate and multidrug-resistant strains of these bacteria has created a demand for new antimicrobial agents. This study demonstrates the effective application of Inula britannica and fermentation technology for developing natural antimicrobial agents against methicillin-resistant Staphylococcus aureus.
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Affiliation(s)
- Won-Young Bae
- Department of Food Science and Biotechnology of Animal Resources, Konkuk University, Seoul, Korea
| | - Hyeong-Yeop Kim
- Department of Food Science and Biotechnology of Animal Resources, Konkuk University, Seoul, Korea
| | - Kee-Tae Kim
- Bio/Molecular Informatics Center, Konkuk University, Seoul, Korea
| | - Hyun-Dong Paik
- Department of Food Science and Biotechnology of Animal Resources, Konkuk University, Seoul, Korea.,Bio/Molecular Informatics Center, Konkuk University, Seoul, Korea
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87
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Roy S, Rhim JW. Preparation of carrageenan-based functional nanocomposite films incorporated with melanin nanoparticles. Colloids Surf B Biointerfaces 2019; 176:317-324. [PMID: 30641303 DOI: 10.1016/j.colsurfb.2019.01.023] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 11/12/2018] [Accepted: 01/08/2019] [Indexed: 11/16/2022]
Abstract
Melanin nanoparticles (MNP) were isolated from sepia ink, spherical and range in size from 40 to 160 nm. Carrageenan-based nanocomposite films with different concentration of MNP (0, 0.25, 0.5, 1.0, and 2.0 wt%) were prepared and their physical, thermal and UV-barrier properties were evaluated. Field emission scanning electron (FE-SEM) micrographs showed well-dispersed MNPs in the carrageenan matrix. The addition of MNP completely shielded the UV light and also affected the apparent color and transparency of the nanocomposite film. The addition of up to 1.0% by weight of MNP significantly increased the mechanical strength of the carrageenan film. The heat resistance of the carrageenan film also increased by mixing with MNP. Incorporation of MNP also reduce the water barrier property and increase the hydrophobicity of the carrageenan film. Also, the MNP-incorporated carrageenan nanocomposite films showed strong antioxidant activity with some antimicrobial activity against foodborne pathogenic bacteria, L. monocytogenes and E. coli.
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Affiliation(s)
- Swarup Roy
- Center for Humanities and Sciences, Bionanocomposite Research Center, Department of Food and Nutrition, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
| | - Jong-Whan Rhim
- Center for Humanities and Sciences, Bionanocomposite Research Center, Department of Food and Nutrition, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea.
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88
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Ye Z, Lu Y, Zong S, Yang L, Shaikh F, Li J, Ye M. Structure, molecular modification and anti-tumor activity of melanin from Lachnum singerianum. Process Biochem 2019. [DOI: 10.1016/j.procbio.2018.09.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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89
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Li S, Yang L, Li J, Chen T, Ye M. Structure, Molecular Modification, and Anti-radiation Activity of Melanin from Lachnum YM156 on Ultraviolet B-Induced Injury in Mice. Appl Biochem Biotechnol 2018; 188:555-567. [PMID: 30547280 DOI: 10.1007/s12010-018-2898-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 09/26/2018] [Indexed: 10/27/2022]
Abstract
The purpose of this study was to examine the protective effects of intracellular homogeneous melanin produced by Lachnum YM156 (LIM) against ultraviolet B (UVB) induced damage in mice. The possible structural formula of the LIM was concluded based on elemental analysis, ultraviolet-visible spectroscopy (UV-Vis), Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), and mass spectrometry (MS). The LIM was modified by arginine to improve its water solubility and biological activities. LIM and ALIM show significant anti-radiation activity in which LIM and ALIM protect the skin under UV radiation. Results indicate that activities of anti-oxidant enzymes in skin were improved after treatment of LIM or ALIM. In addition, LIM and ALIM inhibited over expression of the pro-inflammatory cytokines, including interleukin (IL)-1α, IL-1β, and IL-6 and tumor necrosis factor-α (TNF-α). The protection ability of ALIM was higher than that of LIM at the same dose. Thus, applied LIM and ALIM may be a promising radiation-protective agent.
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Affiliation(s)
- Shenglan Li
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Liuqing Yang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Jinglei Li
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Tingting Chen
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Ming Ye
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China.
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90
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Cai R, Miao M, Yue T, Zhang Y, Cui L, Wang Z, Yuan Y. Antibacterial activity and mechanism of cinnamic acid and chlorogenic acid againstAlicyclobacillus acidoterrestrisvegetative cells in apple juice. Int J Food Sci Technol 2018. [DOI: 10.1111/ijfs.14051] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Rui Cai
- College of Food Science and Engineering Northwest A&F University Yangling Shaanxi 712100 China
- Laboratory of Quality & Safety Risk Assessment for Agro‐products (YangLing) Ministry of Agriculture Yangling Shaanxi 712100 China
- National Engineering Research Center of Agriculture Integration Test (Yangling) Yangling Shaanxi 712100 China
| | - Miao Miao
- College of Food Science and Engineering Northwest A&F University Yangling Shaanxi 712100 China
- Laboratory of Quality & Safety Risk Assessment for Agro‐products (YangLing) Ministry of Agriculture Yangling Shaanxi 712100 China
- National Engineering Research Center of Agriculture Integration Test (Yangling) Yangling Shaanxi 712100 China
| | - Tianli Yue
- College of Food Science and Engineering Northwest A&F University Yangling Shaanxi 712100 China
- Laboratory of Quality & Safety Risk Assessment for Agro‐products (YangLing) Ministry of Agriculture Yangling Shaanxi 712100 China
- National Engineering Research Center of Agriculture Integration Test (Yangling) Yangling Shaanxi 712100 China
| | - Yijun Zhang
- College of Food Science and Engineering Northwest A&F University Yangling Shaanxi 712100 China
- Laboratory of Quality & Safety Risk Assessment for Agro‐products (YangLing) Ministry of Agriculture Yangling Shaanxi 712100 China
- National Engineering Research Center of Agriculture Integration Test (Yangling) Yangling Shaanxi 712100 China
| | - Lu Cui
- College of Food Science and Engineering Northwest A&F University Yangling Shaanxi 712100 China
- Laboratory of Quality & Safety Risk Assessment for Agro‐products (YangLing) Ministry of Agriculture Yangling Shaanxi 712100 China
- National Engineering Research Center of Agriculture Integration Test (Yangling) Yangling Shaanxi 712100 China
| | - Zhouli Wang
- College of Food Science and Engineering Northwest A&F University Yangling Shaanxi 712100 China
- Laboratory of Quality & Safety Risk Assessment for Agro‐products (YangLing) Ministry of Agriculture Yangling Shaanxi 712100 China
- National Engineering Research Center of Agriculture Integration Test (Yangling) Yangling Shaanxi 712100 China
| | - Yahong Yuan
- College of Food Science and Engineering Northwest A&F University Yangling Shaanxi 712100 China
- Laboratory of Quality & Safety Risk Assessment for Agro‐products (YangLing) Ministry of Agriculture Yangling Shaanxi 712100 China
- National Engineering Research Center of Agriculture Integration Test (Yangling) Yangling Shaanxi 712100 China
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91
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Antibacterial effect and mechanism of anthocyanin rich Chinese wild blueberry extract on various foodborne pathogens. Food Control 2018. [DOI: 10.1016/j.foodcont.2018.07.012] [Citation(s) in RCA: 98] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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92
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Wang J, Ma M, Yang J, Chen L, Yu P, Wang J, Gong D, Deng S, Wen X, Zeng Z. In Vitro Antibacterial Activity and Mechanism of Monocaprylin against Escherichia coli and Staphylococcus aureus. J Food Prot 2018; 81:1988-1996. [PMID: 30461297 DOI: 10.4315/0362-028x.jfp-18-248] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
In the present study, the antibacterial activity of monocaprylin in comparison with sodium benzoate and potassium sorbate against Staphylococcus aureus and Escherichia coli was assessed by measuring MIC, MBC, effect of pH on MIC, and incubation temperature on bactericidal efficacy. Results showed that monocaprylin exhibited an excellent antibacterial activity against both strains, with the lowest MIC and MBC of 1.28 mg/mL. A MIC of monocaprylin remained unchanged despite the pH values of culture medium, ranging from 5 to 9, unlike that of potassium sorbate or sodium benzoate. Furthermore, monocaprylin at MBC effectively reduced the population of E. coli and S. aureus by >5.5 log CFU/mL at 25°C within 6 h and decreased E. coli by approximately 5.0 log CFU/mL and S. aureus by 2.9 log CFU/mL at 12 h. The underlying mechanism of monocaprylin was then investigated by measuring β-galactosidase activity, membrane potential, release of cellular contents, scanning electron microscopy, and transmission electron microscopy observations. Results indicated that monocaprylin killed E. coli by the rapid change in permeability and integrity of cell membrane, leading to decline of membrane potential, leakage of nucleic acids and proteins, and ultimately cell membrane disintegration and lysis. On the other hand, monocaprylin might exert its antibacterial activity against S. aureus mainly by diffusing across the cell wall, collapsing the cell membrane, and disturbing the order of intracellular contents. These findings indicated that monocaprylin had better antibacterial ability compared with traditional synthetic preservatives and might be a potential antibacterial additive independent of pH.
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Affiliation(s)
- Jianyu Wang
- 1 State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, People's Republic of China (ORCID: https://orcid.org/0000-0001-7762-4872 [Z.Z.]).,2 Jiangxi Province Key Laboratory of Edible and Medicinal Resources Exploitation, Nanchang University, Nanchang 330031, People's Republic of China.,3 School of Resource and Environmental and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Maomao Ma
- 1 State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, People's Republic of China (ORCID: https://orcid.org/0000-0001-7762-4872 [Z.Z.]).,2 Jiangxi Province Key Laboratory of Edible and Medicinal Resources Exploitation, Nanchang University, Nanchang 330031, People's Republic of China.,4 School of Food Science and Technology, Nanchang University, Nanchang 330031, People's Republic of China
| | - Jun Yang
- 1 State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, People's Republic of China (ORCID: https://orcid.org/0000-0001-7762-4872 [Z.Z.]).,2 Jiangxi Province Key Laboratory of Edible and Medicinal Resources Exploitation, Nanchang University, Nanchang 330031, People's Republic of China.,4 School of Food Science and Technology, Nanchang University, Nanchang 330031, People's Republic of China
| | - Long Chen
- 1 State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, People's Republic of China (ORCID: https://orcid.org/0000-0001-7762-4872 [Z.Z.]).,2 Jiangxi Province Key Laboratory of Edible and Medicinal Resources Exploitation, Nanchang University, Nanchang 330031, People's Republic of China.,4 School of Food Science and Technology, Nanchang University, Nanchang 330031, People's Republic of China
| | - Ping Yu
- 1 State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, People's Republic of China (ORCID: https://orcid.org/0000-0001-7762-4872 [Z.Z.]).,2 Jiangxi Province Key Laboratory of Edible and Medicinal Resources Exploitation, Nanchang University, Nanchang 330031, People's Republic of China.,3 School of Resource and Environmental and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Jun Wang
- 3 School of Resource and Environmental and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Deming Gong
- 1 State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, People's Republic of China (ORCID: https://orcid.org/0000-0001-7762-4872 [Z.Z.]).,2 Jiangxi Province Key Laboratory of Edible and Medicinal Resources Exploitation, Nanchang University, Nanchang 330031, People's Republic of China.,5 New Zealand Institute of Natural Medicine Research, 8 Ha Crescent, Auckland 2104, New Zealand
| | - Shuguang Deng
- 2 Jiangxi Province Key Laboratory of Edible and Medicinal Resources Exploitation, Nanchang University, Nanchang 330031, People's Republic of China.,3 School of Resource and Environmental and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China.,6 School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85284, USA
| | - Xuefang Wen
- 1 State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, People's Republic of China (ORCID: https://orcid.org/0000-0001-7762-4872 [Z.Z.]).,2 Jiangxi Province Key Laboratory of Edible and Medicinal Resources Exploitation, Nanchang University, Nanchang 330031, People's Republic of China.,3 School of Resource and Environmental and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Zheling Zeng
- 1 State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, People's Republic of China (ORCID: https://orcid.org/0000-0001-7762-4872 [Z.Z.]).,2 Jiangxi Province Key Laboratory of Edible and Medicinal Resources Exploitation, Nanchang University, Nanchang 330031, People's Republic of China.,3 School of Resource and Environmental and Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
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93
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Zhu DY, Landis RF, Li CH, Gupta A, Wang LS, Geng Y, Gopalakrishnan S, Guo JW, Rotello VM. Dynamically crosslinked polymer nanocomposites to treat multidrug-resistant bacterial biofilms. NANOSCALE 2018; 10:18651-18656. [PMID: 30264837 PMCID: PMC6190609 DOI: 10.1039/c8nr06348f] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Multidrug-resistant biofilms are highly resistant to current antimicrobial therapies. We have developed an antimicrobial platform that integrates the bacteria-killing phytochemical carvacrol into dynamically crosslinked polymer nanocomposites (DCPNs). Taking advantage of a reversibly crosslinked Schiff-base scaffold throughout the engineered emulsions, DCPNs exhibited long-term shelf-life and good stability in serum, while readily disassembling in acidic microenvironments. Furthermore, we demonstrated that DCPNs efficiently penetrate the biofilm matrix, eradicating both Gram-negative/positive bacteria enclosed within. Moreover, DCPNs showed no observable toxicity to fibroblast mammalian cells with the same antimicrobial concentrations necessary to eradicate MDR biofilms. Given their potent antimicrobial and stimuli-responsive dissociation characteristics in a biofilm setting, DCPNs are a suitable therapeutic platform for combating MDR bacterial infections.
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Affiliation(s)
- Dong Yu Zhu
- School of Chemical Engineering and Light industry, Guangdong University of Technology, 100 Wai Huan Xi Road, Guangzhou, Guangdong, 510006, China
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, United States. ;
| | - Ryan F. Landis
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, United States. ;
| | - Cheng-Hsuan Li
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, United States. ;
| | - Akash Gupta
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, United States. ;
| | - Li-Sheng Wang
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, United States. ;
| | - Yingying Geng
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, United States. ;
| | - Sanjana Gopalakrishnan
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, United States. ;
| | - Jian Wei Guo
- School of Chemical Engineering and Light industry, Guangdong University of Technology, 100 Wai Huan Xi Road, Guangzhou, Guangdong, 510006, China
| | - Vincent M. Rotello
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, United States. ;
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94
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Kang J, Liu L, Wu X, Sun Y, Liu Z. Effect of thyme essential oil against Bacillus cereus planktonic growth and biofilm formation. Appl Microbiol Biotechnol 2018; 102:10209-10218. [PMID: 30288586 DOI: 10.1007/s00253-018-9401-y] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Revised: 09/06/2018] [Accepted: 09/16/2018] [Indexed: 01/04/2023]
Abstract
The objective of this study was to determine the effect of thyme essential oil (TEO) on the planktonic growth and biofilm formation of Bacillus cereus (B. cereus). GC-MS analysis of TEO allowed the detection of 13 compounds, and the major constituents were p-cymene (29.7%), thymol (23.73%), γ-terpinene (16.21%), and 1,8-cineole (9.74%). TEO exhibited a minimum inhibitory concentration (MIC) value against planktonic B. cereus of 0.25 mg/mL. The potent effect of TEO to inhibit the growth of planktonic B. cereus was due to cell membrane damage, as evidenced by reduced cell viability, protein changes, decreased intracellular ATP concentration, increased extracellular ATP concentration and cell membrane depolarization, and cellular morphological changes. In addition, TEO exerted a significant inhibitory effect on B. cereus biofilm formation, as confirmed by environmental scanning electron microscopic images. These findings suggested that TEO has the potential to be developed as a natural food additive to control foodborne contamination associated with B. cereus and its biofilm.
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Affiliation(s)
- Jiamu Kang
- College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China
| | - Liu Liu
- College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China.
| | - Xiaoxia Wu
- College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China
| | - Yuyang Sun
- College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China
| | - Zifei Liu
- College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China
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95
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Synergistic effect of B-type oligomeric procyanidins from lotus seedpod in combination with water-soluble Poria cocos polysaccharides against E. coli and mechanism. J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.07.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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96
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Shi F, Li J, Yang L, Hou G, Ye M. Hypolipidemic effect and protection ability of liver-kidney functions of melanin from Lachnum YM226 in high-fat diet fed mice. Food Funct 2018; 9:880-889. [PMID: 29299589 DOI: 10.1039/c7fo01294b] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
In the present study, we investigated the hypolipidemic properties of melanin from Lachnum YM226 (LM) in high-fat diet induced hyperlipidemic mice. After the hyperlipidemic model was established, mice were randomly divided into six groups, as follows: normal control group (NC), hyperlipidemic control group (HC), positive control group (7 mg kg-1 d-1 simvastatin) (PC) and LM groups (50, 100 and 200 mg kg-1 d-1 denoted as LM-50, LM-100 and LM-200, respectively). Subsequently, the body weight, organ indices, lipid metabolism, antioxidant properties and liver-kidney functions of the mice were examined. Moreover, the activities of lipoprotein metabolism enzymes in serum and liver tissue were examined to study the feasible mechanism. The results imply that LM could effectively reduce body weight, total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C) and atherogenic index (AI), and increase high density lipoprotein cholesterol (HDL-C). Moreover, treatment with LM also increased the antioxidant enzymes activities of superoxide dismutase (SOD) and glutathione peroxidase (GSH-PX) and reduced malondialdehyde (MDA) content relative to the HC group. In addition, the liver and kidney damage indices such as alanine aminotransferase (ALT), aspartate aminotransaminase (AST), alkaline phosphatase (ALP), creatinine (CRE), blood urea nitrogen (BUN) and uric acid were lowered. LM administration also significantly corrected disturbances of liver-kidney functions with no fatty deposits in the liver, resulting in a protective effect against renal histological alteration. The hypolipidemic effect occurred partly due to the regulation of hepatic lipase (HL) and lipoprotein lipase (LPL) in serum and liver to markedly decrease TG. This confirms the important role of LM in the prevention of hyperlipidemia.
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Affiliation(s)
- Fang Shi
- School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, China.
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97
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Antioxidant, antibacterial properties and the light barrier assessment of raw and purified melanins isolated from Citrullus lanatus (watermelon) seeds. HERBA POLONICA 2018. [DOI: 10.2478/hepo-2018-0008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Summary
Introduction: The nutritive value and terapeuthic activity of watermelon seeds is known, but up to day no studies on isolation and characterisation of their melanin were conducted.
Objective: The aim of the study was to evaluate the antioxidant, antibacterial and light barrier properties of raw and purified melanins isolated from watermelon seeds.
Methods: Native melanin was isolated from seeds by alkaline extraction. Obtained pigment was purified by acid hydrolysis. Chemical tests and FT-IR analysis were conducted to determine the melanin nature of the isolated pigments. UV-Vis, transmittance and colour properties were evaluated spectrophotometrically. Antioxidant activity was determined using ABTS and antibacterial activity through a well diffusion method.
Results: The results of the study demonstrated that melanins isolated from watermelon seeds had antioxidant, light barrier and antibacterial properties. A purified form of melanin had higher antioxidant activity and light barrier properties than the raw form. Both melanins inhibited the growth of Enterococcus faecalis and Pseudomonas aeruginosa.
Conclusions: Watermelon seeds may be considered as a promising source of natural melanin which possess remarkable therapeutic action that can support the traditional use of this plant in the ethnomedicine.
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98
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Shi F, Li J, Ye Z, Yang L, Chen T, Chen X, Ye M. Antitumor effects of melanin from Lachnum YM226 and its derivative in H22 tumor-bearing mice. MEDCHEMCOMM 2018; 9:1059-1068. [PMID: 30108995 PMCID: PMC6072318 DOI: 10.1039/c8md00035b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Accepted: 05/08/2018] [Indexed: 11/21/2022]
Abstract
In the present study, we investigated the anti-tumor activities of the intracellular homogeneous melanin (LM) of Lachnum YM226 and its derivative (ALM) on liver cancer using murine H22 hepatocarcinoma model. The results showed that LM and ALM (50 and 200 mg kg-1) could effectively inhibit tumor growth of H22 tumour-bearing mice. The body weight, liver, spleen and thymus indices also improved in the LM and ALM treated groups. Moreover, the levels of alanine aminotransferase (ALT), aspartate aminotransaminase (AST), alkaline phosphatase (ALP), creatinine (CRE), blood urea nitrogen (BUN) and uric acid (UA) were lowered. Serum cytokines of interleukin-2 (IL-2), interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α) and interferon-γ (IFN-γ) were increased on LM and ALM administration, while LM and ALM significantly decreased the vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) levels. The H&E staining indicated that LM and ALM exhibited antitumor activity in vivo by promoting apoptosis and inhibiting angiogenesis. The anti-tumor effect of ALM was more significant than that of LM for the same dose. In summary, the findings demonstrated that LM and ALM might be promising candidates for the prevention and treatment of HCC.
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Affiliation(s)
- Fang Shi
- School of Food Science and Engineering , Hefei University of Technology , Hefei 230009 , China . ; ; ; ; Tel: +86 0551 62919368
| | - Jinglei Li
- School of Food Science and Engineering , Hefei University of Technology , Hefei 230009 , China . ; ; ; ; Tel: +86 0551 62919368
| | - Ziyang Ye
- School of Food Science and Engineering , Hefei University of Technology , Hefei 230009 , China . ; ; ; ; Tel: +86 0551 62919368
| | - Liuqing Yang
- School of Food Science and Engineering , Hefei University of Technology , Hefei 230009 , China . ; ; ; ; Tel: +86 0551 62919368
| | - Tingting Chen
- School of Food Science and Engineering , Hefei University of Technology , Hefei 230009 , China . ; ; ; ; Tel: +86 0551 62919368
| | - Xue Chen
- School of Food Science and Engineering , Hefei University of Technology , Hefei 230009 , China . ; ; ; ; Tel: +86 0551 62919368
| | - Ming Ye
- School of Food Science and Engineering , Hefei University of Technology , Hefei 230009 , China . ; ; ; ; Tel: +86 0551 62919368
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99
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Łopusiewicz Ł, Jędra F, Mizielińska M. New Poly(lactic acid) Active Packaging Composite Films Incorporated with Fungal Melanin. Polymers (Basel) 2018; 10:E386. [PMID: 30966422 PMCID: PMC6415272 DOI: 10.3390/polym10040386] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 03/23/2018] [Accepted: 03/27/2018] [Indexed: 12/21/2022] Open
Abstract
In this work, fungal melanin was used for the first time to prepare poly(lactic acid)-based composites. The films of various melanin concentrations (0.025%, 0.05% and 0.2% w/w) were prepared using an extrusion method. The mechanical, antioxidant, antimicrobial, water vapor and UV-Vis barrier properties, as well as available polyphenolics on the surface, were studied. FT-IR and Raman spectroscopy studies were carried out to analyze the chemical composition of the resulting films. The hydrophobicity, color response, thermal, optical properties, and opacity values were also determined. The results of this study show that the addition of fungal melanin to poly(lactic acid) (PLA) as a modifier influenced mechanical and water vapor barrier properties depending on melanin concentration. In low concentration, melanin enhanced the mechanical and barrier properties of the modified films, but in larger amounts, the properties were decreased. The UV-Vis barrier properties of PLA/melanin composites were marginally improved. Differential Scanning Calorimetry (DSC) analysis indicated that crystallinity of PLA increased by the addition of melanin, but this did not affect the thermal stability of the films. Modified PLA/melanin films showed good antioxidant activity and were active against Enterococcus faecalis, Pseudomonas aeruginosa and Pseudomonas putida. The addition of melanin caused changes in color values, decreasing lightness and increasing the redness and yellowness of films. Based on the results of this study, fungal melanin has good potential to be exploited as a value-added modifier that can improve the overall properties of PLA.
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Affiliation(s)
- Łukasz Łopusiewicz
- Center of Bioimmobilisation and Innovative Packaging Materials, Faculty of Food Sciences and Fisheries, West Pomeranian University of Technology Szczecin, Janickiego 35, 71-270 Szczecin, Poland.
| | - Filip Jędra
- Center of Bioimmobilisation and Innovative Packaging Materials, Faculty of Food Sciences and Fisheries, West Pomeranian University of Technology Szczecin, Janickiego 35, 71-270 Szczecin, Poland.
| | - Małgorzata Mizielińska
- Center of Bioimmobilisation and Innovative Packaging Materials, Faculty of Food Sciences and Fisheries, West Pomeranian University of Technology Szczecin, Janickiego 35, 71-270 Szczecin, Poland.
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Kumar P, Kannan M, ArunPrasanna V, Vaseeharan B, Vijayakumar S. Proteomics analysis of crude squid ink isolated from Sepia esculenta for their antimicrobial, antibiofilm and cytotoxic properties. Microb Pathog 2018; 116:345-350. [DOI: 10.1016/j.micpath.2018.01.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 01/09/2018] [Accepted: 01/26/2018] [Indexed: 10/18/2022]
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