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Mohamed AA, Abdel-Hakam Abbas K, Shaaban Abdelmontaleb H, Hamed MIA, Mostafa IM, Ahmed Elsayed M. A unique implementation of Hantzsch reaction for determination of natamycin in Yoghurt: Hyphenated with Box-Behnken-design for optimization. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 317:124395. [PMID: 38714004 DOI: 10.1016/j.saa.2024.124395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Revised: 04/28/2024] [Accepted: 04/30/2024] [Indexed: 05/09/2024]
Abstract
This study aims to develop a novel and selective method for the detection of natamycin (E235) in yoghurt. The suggested method adopts an application of Hantzsch reaction to turn on the fluorescence behavior of natamycin (blue fluorescence), allowing its sensitive and selective determination in yoghurt samples without any overlapping at 485 nm. The originality of the research lies in the fact that this application takes place for the first time, also the detection (LOD) and quantification (LOQ) limits were very low (0.02 and 0.06μg mL-1, respectively) with a linear concentration range of 0.1-1.0 μgmL-1. Moreover, the developed method was employed for the detection of E235 in yoghurt sample with a good recoveries (98.80 ± 1.20-99.20 ± 1.15 (%), over a concentration range of 0.5-1.0 μgmL-1, (LOD = 0.04 and LOQ = 0.12 μgmL-1). Furthermore, the specificity and convenient application of our intended method is an attempt to determine E235 in milk anddairy products with easily followable steps.
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Affiliation(s)
- Abobakr A Mohamed
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Fayoum University, Faiyum, Egypt
| | | | | | - Mohammed I A Hamed
- Department of Organic and Medicinal Chemistry, Faculty of Pharmacy, Fayoum University, Fayoum, Egypt
| | - Islam M Mostafa
- Analytical Chemistry Department, Faculty of Pharmacy, Minia University, Minia 61511, Egypt
| | - Mohamed Ahmed Elsayed
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Fayoum University, Faiyum, Egypt.
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2
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Dong H, Xu Y, Zhang Q, Li H, Chen L. Activity and safety evaluation of natural preservatives. Food Res Int 2024; 190:114548. [PMID: 38945593 DOI: 10.1016/j.foodres.2024.114548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 02/29/2024] [Accepted: 05/25/2024] [Indexed: 07/02/2024]
Abstract
Synthetic preservatives are widely used in the food industry to control spoilage and growth of pathogenic microorganisms, inhibit lipid oxidation processes and extend the shelf life of food. However, synthetic preservatives have some side effects that can lead to poisoning, cancer and other degenerative diseases. With the improvement of living standards, people are developing safer natural preservatives to replace synthetic preservatives, including plant derived preservatives (polyphenols, essential oils, flavonoids), animal derived preservatives (lysozyme, antimicrobial peptide, chitosan) and microorganism derived preservatives (nisin, natamycin, ε-polylysine, phage). These natural preservatives exert antibacterial effects by disrupting microbial cell wall/membrane structures, interfering with DNA/RNA replication and transcription, and affecting protein synthesis and metabolism. This review summarizes the natural bioactive compounds (polyphenols, flavonoids and terpenoids, etc.) in these preservatives, their antioxidant and antibacterial activities, and safety evaluation in various products.
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Affiliation(s)
- Huiying Dong
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Yang Xu
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Qingqing Zhang
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Hua Li
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China; Institute of Structural Pharmacology & TCM Chemical Biology, Fujian Key Laboratory of Chinese Materia Medica, College of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China.
| | - Lixia Chen
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China.
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3
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Tang LF, Jihuo WL, Shi PD, Mei CX, Zhao ZK, Chen Y, Di YT, Hao XJ, Cao M, Zhao Y, Che YY. Cytotoxic glutarimide-containing polyketides isolated from Streptomyces sp. JCM 4793. J Antibiot (Tokyo) 2024:10.1038/s41429-024-00743-1. [PMID: 38816449 DOI: 10.1038/s41429-024-00743-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/30/2024] [Accepted: 05/06/2024] [Indexed: 06/01/2024]
Abstract
Glutarimide-containing polyketides usually exhibit anti-fungi activity, which was well exampled by cycloheximide. In our work, three new polyketide structures, 12-amidestreptimidone (1), 12-carboxylstreptimidone (2) and 3-(5S,8R)-(2-amino-2-oxoethyl-2'-methoxy-2'-oxoethyl)-8,10-dimethyl-7-oxododeca-5-hydroxy-9E,11-diolefin (3) were isolated from Streptomyces sp. JCM 4793. 3 without the glutarimide moiety is not active against fungi as expected, while 1 bearing the amide moiety is much more active than its carboxylic form 2. Here we report the isolation, structural elucidation, antifungal activity, and proposed biosynthesis pathway of 1-3.
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Affiliation(s)
- Lin-Fang Tang
- Faculty of Pharmacy, Yunnan University of TCM, Kunming, Yunnan, 650500, China
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, 650201, China
| | - Wu-Lai Jihuo
- Faculty of Pharmacy, Yunnan University of TCM, Kunming, Yunnan, 650500, China
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, 650201, China
| | - Pei-Dong Shi
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, 650201, China
| | - Cui-Xuan Mei
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, 650201, China
| | - Zi-Kang Zhao
- Faculty of Pharmacy, Yunnan University of TCM, Kunming, Yunnan, 650500, China
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, 650201, China
| | - Yuan Chen
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, 650201, China
| | - Ying-Tong Di
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, 650201, China
| | - Xiao-Jiang Hao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, 650201, China
| | - Mingming Cao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, 650201, China.
| | - Yi Zhao
- Faculty of Pharmacy, Yunnan University of TCM, Kunming, Yunnan, 650500, China.
| | - Yan-Yun Che
- Faculty of Pharmacy, Yunnan University of TCM, Kunming, Yunnan, 650500, China.
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4
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Szomek M, Akkerman V, Lauritsen L, Walther HL, Juhl AD, Thaysen K, Egebjerg JM, Covey DF, Lehmann M, Wessig P, Foster AJ, Poolman B, Werner S, Schneider G, Müller P, Wüstner D. Ergosterol promotes aggregation of natamycin in the yeast plasma membrane. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2024; 1866:184350. [PMID: 38806103 DOI: 10.1016/j.bbamem.2024.184350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 05/11/2024] [Accepted: 05/24/2024] [Indexed: 05/30/2024]
Abstract
Polyene macrolides are antifungal substances, which interact with cells in a sterol-dependent manner. While being widely used, their mode of action is poorly understood. Here, we employ ultraviolet-sensitive (UV) microscopy to show that the antifungal polyene natamycin binds to the yeast plasma membrane (PM) and causes permeation of propidium iodide into cells. Right before membrane permeability became compromised, we observed clustering of natamycin in the PM that was independent of PM protein domains. Aggregation of natamycin was paralleled by cell deformation and membrane blebbing as revealed by soft X-ray microscopy. Substituting ergosterol for cholesterol decreased natamycin binding and caused a reduced clustering of natamycin in the PM. Blocking of ergosterol synthesis necessitates sterol import via the ABC transporters Aus1/Pdr11 to ensure natamycin binding. Quantitative imaging of dehydroergosterol (DHE) and cholestatrienol (CTL), two analogues of ergosterol and cholesterol, respectively, revealed a largely homogeneous lateral sterol distribution in the PM, ruling out that natamycin binds to pre-assembled sterol domains. Depletion of sphingolipids using myriocin increased natamycin binding to yeast cells, likely by increasing the ergosterol fraction in the outer PM leaflet. Importantly, binding and membrane aggregation of natamycin was paralleled by a decrease of the dipole potential in the PM, and this effect was enhanced in the presence of myriocin. We conclude that ergosterol promotes binding and aggregation of natamycin in the yeast PM, which can be synergistically enhanced by inhibitors of sphingolipid synthesis.
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Affiliation(s)
- Maria Szomek
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Vibeke Akkerman
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Line Lauritsen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Hanna-Loisa Walther
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Alice Dupont Juhl
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Katja Thaysen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Jacob Marcus Egebjerg
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Douglas F Covey
- Department of Developmental Biology, Washington University in St. Louis, St. Louis, MO 63110, USA; Taylor Family Institute for Innovative Psychiatric Research, USA
| | - Max Lehmann
- Institute for Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
| | - Pablo Wessig
- Institute for Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
| | - Alexander J Foster
- Department of Biochemistry, University of Groningen, Nijenborgh 4, 9747 Groningen, the Netherlands
| | - Bert Poolman
- Department of Biochemistry, University of Groningen, Nijenborgh 4, 9747 Groningen, the Netherlands
| | - Stephan Werner
- Department of X-Ray Microscopy, Helmholtz-Zentrum Berlin, Albert-Einstein-Str. 15, 12489 Berlin, Germany
| | - Gerd Schneider
- Department of X-Ray Microscopy, Helmholtz-Zentrum Berlin, Albert-Einstein-Str. 15, 12489 Berlin, Germany
| | - Peter Müller
- Department of Biology, Humboldt University Berlin, Invalidenstr. 43, D-10115 Berlin, Germany
| | - Daniel Wüstner
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230 Odense M, Denmark.
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5
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Lazic J, Filipovic V, Pantelic L, Milovanovic J, Vojnovic S, Nikodinovic-Runic J. Late-stage diversification of bacterial natural products through biocatalysis. Front Bioeng Biotechnol 2024; 12:1351583. [PMID: 38807651 PMCID: PMC11130421 DOI: 10.3389/fbioe.2024.1351583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 04/18/2024] [Indexed: 05/30/2024] Open
Abstract
Bacterial natural products (BNPs) are very important sources of leads for drug development and chemical novelty. The possibility to perform late-stage diversification of BNPs using biocatalysis is an attractive alternative route other than total chemical synthesis or metal complexation reactions. Although biocatalysis is gaining popularity as a green chemistry methodology, a vast majority of orphan sequenced genomic data related to metabolic pathways for BNP biosynthesis and its tailoring enzymes are underexplored. In this review, we report a systematic overview of biotransformations of 21 molecules, which include derivatization by halogenation, esterification, reduction, oxidation, alkylation and nitration reactions, as well as degradation products as their sub-derivatives. These BNPs were grouped based on their biological activities into antibacterial (5), antifungal (5), anticancer (5), immunosuppressive (2) and quorum sensing modulating (4) compounds. This study summarized 73 derivatives and 16 degradation sub-derivatives originating from 12 BNPs. The highest number of biocatalytic reactions was observed for drugs that are already in clinical use: 28 reactions for the antibacterial drug vancomycin, followed by 18 reactions reported for the immunosuppressive drug rapamycin. The most common biocatalysts include oxidoreductases, transferases, lipases, isomerases and haloperoxidases. This review highlights biocatalytic routes for the late-stage diversification reactions of BNPs, which potentially help to recognize the structural optimizations of bioactive scaffolds for the generation of new biomolecules, eventually leading to drug development.
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Affiliation(s)
- Jelena Lazic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
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6
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Lavanya M, Namasivayam SKR, John A. Developmental Formulation Principles of Food Preservatives by Nanoencapsulation-Fundamentals, Application, and Challenges. Appl Biochem Biotechnol 2024:10.1007/s12010-024-04943-1. [PMID: 38713338 DOI: 10.1007/s12010-024-04943-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/16/2024] [Indexed: 05/08/2024]
Abstract
The role of food additives is to preserve food by extending shelf life and limiting harmful microorganism proliferation. They prevent spoilage by enhancing the taste and safety of food by utilizing beneficial microorganisms and their antimicrobial metabolites. Current advances in food preservation and processing utilize green technology principles for green preservative formulation, enhancing nutrition and supplying essential micronutrients safely, while also improving quality, packaging, and food safety. Encapsulation is gaining attention for its potential to protect delicate materials from oxidative degradation and extend their shelf life, thereby ensuring optimal nutrient uptake. Nanoencapsulation of bioactive compounds has significantly improved the food, pharmaceutical, agriculture, and nutraceutical industries by protecting antioxidants, vitamins, minerals, and essential fatty acids by controlling release and ensuring delivery to specific sites in the human body. This emerging area is crucial for future industrial production, improving the sensory properties of foods like color, taste, and texture. Research on encapsulated bioactive compounds like bacteriocins, LAB, natamycin, polylysine, and bacteriophage is crucial for their potential antioxidant and antimicrobial activities in food applications and the food industry. This paper reviews nanomaterials used as food antimicrobial carriers, including nanoemulsions, nanoliposomes, nanoparticles, and nanofibers, to protect natural food antimicrobials from degradation and improve antimicrobial activity. This review discusses nanoencapsulation techniques for biopreservative agents like nisin, poly lysine, and natamycin, focusing on biologically-derived polymeric nanofibers, nanocarriers, nanoliposomes, and polymer-stabilized metallic nanoparticles. Nanomaterials, in general, improve the dispersibility, stability, and availability of bioactive substances, and this study discusses the controlled release of nanoencapsulated biopreservative agents.
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Affiliation(s)
- M Lavanya
- Centre for Applied Research, Saveetha School of Engineering, Saveetha Institute of Medical and Applied Research (SIMATS), Chennai, Tamil Nadu, 602105, India
| | - S Karthick Raja Namasivayam
- Centre for Applied Research, Saveetha School of Engineering, Saveetha Institute of Medical and Applied Research (SIMATS), Chennai, Tamil Nadu, 602105, India.
| | - Arun John
- Department of Computational Biology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Chennai, Tamil Nadu, 602105, India
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7
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Soutelino MEM, Silva ACDO, Rocha RDS. Natural Antimicrobials in Dairy Products: Benefits, Challenges, and Future Trends. Antibiotics (Basel) 2024; 13:415. [PMID: 38786143 PMCID: PMC11117376 DOI: 10.3390/antibiotics13050415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 04/23/2024] [Accepted: 04/24/2024] [Indexed: 05/25/2024] Open
Abstract
This review delves into using natural antimicrobials in the dairy industry and examines various sources of these compounds, including microbial, plant, and animal sources. It discusses the mechanisms by which they inhibit microbial growth, for example, by binding to the cell wall's precursor molecule of the target microorganism, consequently inhibiting its biosynthesis, and interfering in the molecule transport mechanism, leading to cell death. In general, they prove to be effective against the main pathogens and spoilage found in food, such as Escherichia coli, Staphylococcus aureus, Bacillus spp., Salmonella spp., mold, and yeast. Moreover, this review explores encapsulation technology as a promising approach for increasing the viability of natural antimicrobials against unfavorable conditions such as pH, temperature, and oxygen exposure. Finally, this review examines the benefits and challenges of using natural antimicrobials in dairy products. While natural antimicrobials offer several advantages, including improved safety, quality, and sensory properties of dairy products, it is crucial to be aware of the challenges associated with their use, such as potential allergenicity, regulatory requirements, and consumer perception. This review concludes by emphasizing the need for further research to identify and develop effective and safe natural antimicrobials for the dairy industry to ensure the quality and safety of dairy products for consumers.
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Affiliation(s)
- Maria Eduarda Marques Soutelino
- Department of Food Technology (MTA), College of Veterinary, Fluminense Federal University (UFF), 24230-340 Niterói, Brazil; (M.E.M.S.); (A.C.d.O.S.)
| | - Adriana Cristina de Oliveira Silva
- Department of Food Technology (MTA), College of Veterinary, Fluminense Federal University (UFF), 24230-340 Niterói, Brazil; (M.E.M.S.); (A.C.d.O.S.)
| | - Ramon da Silva Rocha
- Food Engineering Department (ZEA), College of Animal Science and Food Engineering (FZEA), University of São Paulo (USP), 13635-900 Pirassununga, Brazil
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Talarico L, Clemente I, Gennari A, Gabbricci G, Pepi S, Leone G, Bonechi C, Rossi C, Mattioli SL, Detta N, Magnani A. Physiochemical Characterization of Lipidic Nanoformulations Encapsulating the Antifungal Drug Natamycin. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:726. [PMID: 38668220 PMCID: PMC11053702 DOI: 10.3390/nano14080726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 04/09/2024] [Accepted: 04/17/2024] [Indexed: 04/29/2024]
Abstract
Natamycin is a tetraene polyene that exploits its antifungal properties by irreversibly binding components of fungal cell walls, blocking the growth of infections. However, topical ocular treatments with natamycin require frequent application due to the low ability of this molecule to permeate the ocular membrane. This limitation has limited the use of natamycin as an antimycotic drug, despite it being one of the most powerful known antimycotic agents. In this work, different lipidic nanoformulations consisting of transethosomes or lipid nanoparticles containing natamycin are proposed as carriers for optical topical administration. Size, stability and zeta potential were characterized via dynamic light scattering, the supramolecular structure was investigated via small- and wide-angle X-ray scattering and 1H-NMR, and the encapsulation efficiencies of the four proposed formulations were determined via HPLC-DAD.
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Affiliation(s)
- Luigi Talarico
- Department of Biotechnology Chemistry and Pharmacy, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy; (L.T.); (I.C.); (A.G.); (G.G.); (S.P.); (G.L.); (C.B.); (C.R.)
- National Interuniversity Consortium of Material Science and Technology (INSTM), Siena Research Unit, Via G. Giusti 9, 50121 Firenze, Italy
- Center for Colloids and Surface Science (CSGI), Siena Research Group, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Ilaria Clemente
- Department of Biotechnology Chemistry and Pharmacy, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy; (L.T.); (I.C.); (A.G.); (G.G.); (S.P.); (G.L.); (C.B.); (C.R.)
- Center for Colloids and Surface Science (CSGI), Siena Research Group, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Alessandro Gennari
- Department of Biotechnology Chemistry and Pharmacy, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy; (L.T.); (I.C.); (A.G.); (G.G.); (S.P.); (G.L.); (C.B.); (C.R.)
| | - Giulia Gabbricci
- Department of Biotechnology Chemistry and Pharmacy, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy; (L.T.); (I.C.); (A.G.); (G.G.); (S.P.); (G.L.); (C.B.); (C.R.)
- Center for Colloids and Surface Science (CSGI), Siena Research Group, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Simone Pepi
- Department of Biotechnology Chemistry and Pharmacy, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy; (L.T.); (I.C.); (A.G.); (G.G.); (S.P.); (G.L.); (C.B.); (C.R.)
- National Interuniversity Consortium of Material Science and Technology (INSTM), Siena Research Unit, Via G. Giusti 9, 50121 Firenze, Italy
- Center for Colloids and Surface Science (CSGI), Siena Research Group, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Gemma Leone
- Department of Biotechnology Chemistry and Pharmacy, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy; (L.T.); (I.C.); (A.G.); (G.G.); (S.P.); (G.L.); (C.B.); (C.R.)
- National Interuniversity Consortium of Material Science and Technology (INSTM), Siena Research Unit, Via G. Giusti 9, 50121 Firenze, Italy
- Center for Colloids and Surface Science (CSGI), Siena Research Group, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Claudia Bonechi
- Department of Biotechnology Chemistry and Pharmacy, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy; (L.T.); (I.C.); (A.G.); (G.G.); (S.P.); (G.L.); (C.B.); (C.R.)
- Center for Colloids and Surface Science (CSGI), Siena Research Group, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Claudio Rossi
- Department of Biotechnology Chemistry and Pharmacy, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy; (L.T.); (I.C.); (A.G.); (G.G.); (S.P.); (G.L.); (C.B.); (C.R.)
- Center for Colloids and Surface Science (CSGI), Siena Research Group, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Simone Luca Mattioli
- Dompé Farmaceutici S.p.A, Via Campo di Pile SNC, 67100 L’Aquila, Italy; (S.L.M.); (N.D.)
| | - Nicola Detta
- Dompé Farmaceutici S.p.A, Via Campo di Pile SNC, 67100 L’Aquila, Italy; (S.L.M.); (N.D.)
| | - Agnese Magnani
- Department of Biotechnology Chemistry and Pharmacy, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy; (L.T.); (I.C.); (A.G.); (G.G.); (S.P.); (G.L.); (C.B.); (C.R.)
- National Interuniversity Consortium of Material Science and Technology (INSTM), Siena Research Unit, Via G. Giusti 9, 50121 Firenze, Italy
- Center for Colloids and Surface Science (CSGI), Siena Research Group, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
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9
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Ahmed MBM, El-ssayad MF, Yousef SY, Salem SH. Bee venom: A potential natural alternative to conventional preservatives for prolonging the shelf-life of soft cheese 'Talaga'. Heliyon 2024; 10:e28968. [PMID: 38601605 PMCID: PMC11004823 DOI: 10.1016/j.heliyon.2024.e28968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 03/27/2024] [Accepted: 03/27/2024] [Indexed: 04/12/2024] Open
Abstract
The study aims to explore bee venom (honey-BV) as a potential natural preservative for "Tallaga" soft cheese. Characterization of the active compounds in honey-BV was conducted via chromatographic analyses. Antimicrobial efficacy against pathogenic bacteria and fungi was evaluated, and minimum inhibitory concentration (MIC) was determined. Subsequently, honey-BV was applied to Tallaga cheese at 15 mg/g concentrations. The main active ingredients identified in bee venom were apamin (2%) and melittin (48.7%). Both concentrations of bee venom (100 and 200 mg/mL) exhibited significant antifungal and antibacterial properties against tested organisms, with MIC values varied from 0.2 to 0.5 mg/mL for bacteria to 3-13 mg/mL for fungi. Application of honey-BV in Tallaga cheese resulted in complete elimination of Staphylococcal populations after 2 weeks of cold storage, with no detectable growth of molds or yeasts throughout the storage period. Additionally, a steady decrease in aerobic plate count was observed over time. In summary, honey-BV holds promise as a natural preservative for soft cheese, however, more investigation is required to optimize the concentration for economic viability, taking into account health benefits and safety considerations.
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Affiliation(s)
- Mohamed Bedair M. Ahmed
- Department of Food Toxicology and Contaminants, National Research Centre, 33 El-Bohouth St., P.O. Box: 12622, Dokki, Cairo, Egypt
| | - Mohamed Fathy El-ssayad
- Dairy Sciences Department, National Research Centre, 33 El-Bohouth St., P.O. Box: 12622, Dokki, Cairo, Egypt
| | | | - Salah H. Salem
- Department of Food Toxicology and Contaminants, National Research Centre, 33 El-Bohouth St., P.O. Box: 12622, Dokki, Cairo, Egypt
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10
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Park HS, Kang SH, Choi SS, Kim ES. Isolation of Streptomyces inhibiting multiple-phytopathogenic fungi and characterization of lucensomycin biosynthetic gene cluster. Sci Rep 2024; 14:7757. [PMID: 38565875 PMCID: PMC10987574 DOI: 10.1038/s41598-024-57888-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 03/22/2024] [Indexed: 04/04/2024] Open
Abstract
Soil microorganisms with diverse bioactive compounds such as Streptomyces are appreciated as valuable resources for the discovery of eco-friendly fungicides. This study isolated a novel Streptomyces from soil samples collected in the organic green tea fields in South Korea. The isolation process involved antifungal activity screening around 2400 culture extracts, revealing a strain designated as S. collinus Inha504 with remarkable antifungal activity against diverse phytopathogenic fungi. S. collinus Inha504 not only inhibited seven phytopathogenic fungi including Fusarium oxysporum and Aspergillus niger in bioassays and but also showed a control effect against F. oxysporum infected red pepper, strawberry, and tomato in the in vivo pot test. Genome mining of S. collinus Inha504 revealed the presence of the biosynthetic gene cluster (BGC) in the chromosome encoding a polyene macrolide which is highly homologous to the lucensomycin (LCM), a compound known for effective in crop disease control. Through genetic confirmation and bioassays, the antifungal activity of S. collinus Inha504 was attributed to the presence of LCM BGC in the chromosome. These results could serve as an effective strategy to select novel Streptomyces strains with valuable biological activity through bioassay-based screening and identify biosynthetic gene clusters responsible for the metabolites using genome mining approach.
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Affiliation(s)
- Heung-Soon Park
- Department of Biological Sciences and Bioengineering, Inha University, Incheon, 22212, Republic of Korea
| | - Seung-Hoon Kang
- Department of Biological Sciences and Bioengineering, Inha University, Incheon, 22212, Republic of Korea
| | - Si-Sun Choi
- Department of Biological Sciences and Bioengineering, Inha University, Incheon, 22212, Republic of Korea
| | - Eung-Soo Kim
- Department of Biological Sciences and Bioengineering, Inha University, Incheon, 22212, Republic of Korea.
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11
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Mavani NR, Mohd Ali J, Hussain M, Abd. Rahman N, Hashim H. Determining food safety in canned food using fuzzy logic based on sulphur dioxide, benzoic acid and sorbic acid concentration. Heliyon 2024; 10:e26273. [PMID: 38384537 PMCID: PMC10879013 DOI: 10.1016/j.heliyon.2024.e26273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 01/11/2024] [Accepted: 02/09/2024] [Indexed: 02/23/2024] Open
Abstract
Canned food market demand has arisen due to the higher need for instant and ready-to-eat food. Food preservatives are often added to canned and processed foods to prolong their shelf life and help to sustain the quality, taste, color, and food texture. However, excessive usage of such food preservatives can lead to various diseases and health issues including palpitations, allergies, and cancer. Therefore, food preservative detection in food samples is essential for safe consumption and health well-being. This paper proposed a fuzzy logic framework to determine the safety of food products based on the concentration of sulphur dioxide (SD), benzoic acid (BA), and sorbic acid (SA) in five different food categories as referred to the Food Acts 1983 and Food Regulations 1985 in Malaysia. The fuzzy logic framework comprises of Mamdani inference system design with 90 fuzzy rules, 15 and 5 membership functions for both the input and output parameters respectively. 50 random values and 10 lab analysis results based on the industrial samples were used to validate the developed algorithms in ensuring the safety of the food products. The membership functions generated for the three inputs (SD, BA, and SA) during the fuzzification steps are based on the maximum allowable limit from the food acts. The defuzzification of fuzzy logic gave an average output value of 0.1565, 0.1350, 0.1150, 0.1100, and 0.1550 for chicken curry with potatoes, satay sauce, sardine in tomato sauce, anchovies paste, and sardine spread accordingly. Results obtained from the fuzzy logic framework concluded that all the industrial samples are safe to be eaten and comply with the Sixth Schedule, Regulation 20 in both Acts.
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Affiliation(s)
- Nidhi Rajesh Mavani
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia
| | - Jarinah Mohd Ali
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia
| | - M.A. Hussain
- Department of Chemical Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Norliza Abd. Rahman
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia
| | - Haslaniza Hashim
- Department of Food Sciences, Faculty of Science & Technology, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia
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12
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Li M, Liu Y, Gong Y, Yan X, Wang L, Zheng W, Ai H, Zhao Y. Recent advances in nanoantibiotics against multidrug-resistant bacteria. NANOSCALE ADVANCES 2023; 5:6278-6317. [PMID: 38024316 PMCID: PMC10662204 DOI: 10.1039/d3na00530e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Accepted: 10/05/2023] [Indexed: 12/01/2023]
Abstract
Multidrug-resistant (MDR) bacteria-caused infections have been a major threat to human health. The abuse of conventional antibiotics accelerates the generation of MDR bacteria and makes the situation worse. The emergence of nanomaterials holds great promise for solving this tricky problem due to their multiple antibacterial mechanisms, tunable antibacterial spectra, and low probabilities of inducing drug resistance. In this review, we summarize the mechanism of the generation of drug resistance, and introduce the recently developed nanomaterials for dealing with MDR bacteria via various antibacterial mechanisms. Considering that biosafety and mass production are the major bottlenecks hurdling the commercialization of nanoantibiotics, we introduce the related development in these two aspects. We discuss urgent challenges in this field and future perspectives to promote the development and translation of nanoantibiotics as alternatives against MDR pathogens to traditional antibiotics-based approaches.
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Affiliation(s)
- Mulan Li
- Cancer Research Center, Jiangxi University of Chinese Medicine No. 1688 Meiling Avenue, Xinjian District Nanchang Jiangxi 330004 P. R. China
| | - Ying Liu
- Key Laboratory of Follicular Development and Reproductive Health in Liaoning Province, Third Affiliated Hospital of Jinzhou Medical University No. 2, Section 5, Heping Road Jin Zhou Liaoning 121000 P. R. China
| | - Youhuan Gong
- Cancer Research Center, Jiangxi University of Chinese Medicine No. 1688 Meiling Avenue, Xinjian District Nanchang Jiangxi 330004 P. R. China
| | - Xiaojie Yan
- Cancer Research Center, Jiangxi University of Chinese Medicine No. 1688 Meiling Avenue, Xinjian District Nanchang Jiangxi 330004 P. R. China
| | - Le Wang
- Cancer Research Center, Jiangxi University of Chinese Medicine No. 1688 Meiling Avenue, Xinjian District Nanchang Jiangxi 330004 P. R. China
| | - Wenfu Zheng
- CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety, National Center for NanoScience and Technology No. 11 Zhongguancun Beiyitiao, Haidian District Beijing 100190 P. R. China
- The University of Chinese Academy of Sciences 19A Yuquan Road, Shijingshan District Beijing 100049 P. R. China
- Cannano Tefei Technology, Co. LTD Room 1013, Building D, No. 136 Kaiyuan Avenue, Huangpu District Guangzhou Guangdong Province 510535 P. R. China
| | - Hao Ai
- Key Laboratory of Follicular Development and Reproductive Health in Liaoning Province, Third Affiliated Hospital of Jinzhou Medical University No. 2, Section 5, Heping Road Jin Zhou Liaoning 121000 P. R. China
| | - Yuliang Zhao
- CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety, National Center for NanoScience and Technology No. 11 Zhongguancun Beiyitiao, Haidian District Beijing 100190 P. R. China
- The University of Chinese Academy of Sciences 19A Yuquan Road, Shijingshan District Beijing 100049 P. R. China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences 19B Yuquan Road, Shijingshan District Beijing 100049 P. R. China
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13
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Wu W, Li Y, Zhu X, Wang L, Wang J, Qin Y, Zhang M, Yu C, Gou C, Yan X. Antimicrobial activity enabled by chitosan-ε-polylysine-natamycin and its effect on microbial diversity of tomato scrambled egg paste. Food Chem X 2023; 19:100872. [PMID: 37780335 PMCID: PMC10534210 DOI: 10.1016/j.fochx.2023.100872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 08/31/2023] [Accepted: 09/06/2023] [Indexed: 10/03/2023] Open
Abstract
For a long time, food spoilage posed a severe impairment on food safety and public health. Although chemical preservatives are commonly used to inhibit spoilage/ pathogenic microbial growth, the disadvantages of a single target, potential toxicity and high dose of use limit the better use of preservatives. In this research, the combination of natural preservatives: Natamycin (Nat), ε-polylysine (ε-PL), and Chitosan (CS) could achieve an excellent antimicrobial effect including bacteria and fungi, and reduce the usage of a single preservative. Compound preservatives could destroy microbial morphology and damage the integrity of the cell wall/membrane by leakage of protein and alkaline phosphatase (AKP). Besides, high-throughput sequencing revealed that compound preservatives could decrease microbial diversity and richness, especially, Pseudomonas, Acinetobacter, Fusarium, and Aspergillus. Therefore, the combination of 1/8 × MIC CS, 1/4 × MIC ε-PL, and 1/2 × MIC Nat can achieve an excellent antibacterial effect, providing new ideas for food preservation.
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Affiliation(s)
- Wanfeng Wu
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science & Technology, Xinjiang University, Urumqi 830046, China
| | - Yaru Li
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science & Technology, Xinjiang University, Urumqi 830046, China
| | - Xiaoyu Zhu
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science & Technology, Xinjiang University, Urumqi 830046, China
| | - Liang Wang
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science & Technology, Xinjiang University, Urumqi 830046, China
| | - Jiayi Wang
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science & Technology, Xinjiang University, Urumqi 830046, China
| | - Yanan Qin
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science & Technology, Xinjiang University, Urumqi 830046, China
| | - Minwei Zhang
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science & Technology, Xinjiang University, Urumqi 830046, China
| | - Chunshan Yu
- Xinjiang Xiaochu Food Co., Ltd., Changji 831100, China
| | - Chunmei Gou
- Xinjiang Xiaochu Food Co., Ltd., Changji 831100, China
| | - Xiaoqin Yan
- Xinjiang Xiaochu Food Co., Ltd., Changji 831100, China
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14
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Agirman B, Carsanba E, Settanni L, Erten H. Exploring yeast-based microbial interactions: The next frontier in postharvest biocontrol. Yeast 2023; 40:457-475. [PMID: 37653692 DOI: 10.1002/yea.3895] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 08/13/2023] [Accepted: 08/17/2023] [Indexed: 09/02/2023] Open
Abstract
Fresh fruits and vegetables are susceptible to a large variety of spoilage agents before and after harvest. Among these, fungi are mostly responsible for the microbiological deteriorations that lead to economically significant losses of fresh produce. Today, synthetic fungicides represent the first approach for controlling postharvest spoilage in fruits and vegetables worldwide. However, the emergence of fungicide-resistant pathogen biotypes and the increasing awareness of consumers toward the health implications of hazardous chemicals imposed an urgent need to reduce the use of synthetic fungicides in the food supply; this phenomenon strengthened the search for alternative biocontrol strategies that are more effective, safer, nontoxic, low-residue, environment friendly, and cost-effective. In the last decade, biocontrol with antagonistic yeasts became a promising strategy to reduce chemical compounds during fruit and vegetable postharvest, and several yeast-based biocontrol products have been commercialized. Biocontrol is a multipartite system that includes different microbial groups (spoilage mold, yeast, bacteria, and nonspoilage resident microorganisms), host fruit, vegetables, or plants, and the environment. The majority of biocontrol studies focused on yeast-mold mechanisms, with little consideration for yeast-bacteria and yeast-yeast interactions. The current review focused mainly on the unexplored yeast-based interactions and the mechanisms of actions in biocontrol systems as well as on the importance and advantages of using yeasts as biocontrol agents, improving antagonist efficiency, the commercialization process and associated challenges, and future perspectives.
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Affiliation(s)
- Bilal Agirman
- Department of Food Engineering, Faculty of Engineering, Cukurova University, Adana, Turkey
| | - Erdem Carsanba
- Centro de Biotecnologia e Química Fina (CBQF), Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Porto, Portugal
| | - Luca Settanni
- Department of Agricultural, Food and Forestry Science, University of Palermo, Palermo, Italy
| | - Huseyin Erten
- Department of Food Engineering, Faculty of Engineering, Cukurova University, Adana, Turkey
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15
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Abdel-Hakim A, Belal F, Hammad MA, El-Maghrabey M. Rapid microwave synthesis of N and S dual-doped carbon quantum dots for natamycin determination based on fluorescence switch-off assay. Methods Appl Fluoresc 2023; 11:045007. [PMID: 37586384 DOI: 10.1088/2050-6120/acf119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Accepted: 08/16/2023] [Indexed: 08/18/2023]
Abstract
Green, one-pot, quick, and easily synthesized nitrogen and sulfur co-doped carbon quantum dots (N,S-CDs) were obtained from cheap and readily available chemicals (sucrose, urea, and thiourea) using a microwave-assisted approach in about 4 min and utilized as a turn-off fluorescent sensor for estimation of natamycin (NAT). First, the effect of N and S doping on the microwave-synthesized CDs' quantum yield was carefully studied. CDs derived from sucrose alone failed to produce a high quantum yield; then, to increase the quantum yield, doping with heteroatoms was carried out using either urea or thiourea. A slight increase in quantum yield was observed upon using thiourea with sucrose, while an obvious enhancement of quantum yield was obtained when urea was used instead of thiourea. Surprisingly, using a combination of urea and thiourea together results in N,S-CDs with the highest quantum yield (53.5%), uniform and small particle size distribution, and extended stability. The fluorescent signal of N,S-CDs was quenched upon addition of NAT due to inner filter effect and static quenching in a manner that allowed for quantitative determination of NAT over a range of 0.5-10.0μg ml-1(LOD = 0.10μg ml-1). The N,S-CDs were applicable for determination of NAT in aqueous humor, eye drops, different environmental water samples, and bread with excellent performance. The selectivity study indicated excellent selectivity of the prepared N,S-CDs toward NAT with little interference from possibly interfering substances. In-silico toxicological evaluation of NAT was conducted to estimate its long-term toxicity and drug-drug interactions. Finally, the preparation of N,S-CDs, and analytical procedure compliance with the green chemistry principles were confirmed by two greenness assessment tools.
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Affiliation(s)
- Ali Abdel-Hakim
- Analytical Chemistry Department, Faculty of Pharmacy, University of Sadat City, Sadat City, Monufia, 32897, Egypt
| | - Fathalla Belal
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, 35526, Egypt
| | - Mohamed A Hammad
- Analytical Chemistry Department, Faculty of Pharmacy, University of Sadat City, Sadat City, Monufia, 32897, Egypt
| | - Mahmoud El-Maghrabey
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, 35526, Egypt
- Graduate School of Biomedical Sciences, Course of Pharmaceutical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
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16
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Akkerman V, Scheidt HA, Reinholdt P, Bashawat M, Szomek M, Lehmann M, Wessig P, Covey DF, Kongsted J, Müller P, Wüstner D. Natamycin interferes with ergosterol-dependent lipid phases in model membranes. BBA ADVANCES 2023; 4:100102. [PMID: 37691996 PMCID: PMC10482743 DOI: 10.1016/j.bbadva.2023.100102] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023] Open
Abstract
Natamycin is an antifungal polyene macrolide that is used as a food preservative but also to treat fungal keratitis and other yeast infections. In contrast to other polyene antimycotics, natamycin does not form ion pores in the plasma membrane, but its mode of action is poorly understood. Using nuclear magnetic resonance (NMR) spectroscopy of deuterated sterols, we find that natamycin slows the mobility of ergosterol and cholesterol in liquid-ordered (Lo) membranes to a similar extent. This is supported by molecular dynamics (MD) simulations, which additionally reveal a strong impact of natamycin dimers on sterol dynamics and water permeability. Interference with sterol-dependent lipid packing is also reflected in a natamycin-mediated increase in membrane accessibility for dithionite, particularly in bilayers containing ergosterol. NMR experiments with deuterated sphingomyelin (SM) in sterol-containing membranes reveal that natamycin reduces phase separation and increases lipid exchange in bilayers with ergosterol. In ternary lipid mixtures containing monounsaturated phosphatidylcholine, saturated SM, and either ergosterol or cholesterol, natamycin interferes with phase separation into Lo and liquid-disordered (Ld) domains, as shown by NMR spectroscopy. Employing the intrinsic fluorescence of natamycin in ultraviolet-sensitive microscopy, we can visualize the binding of natamycin to giant unilamellar vesicles (GUVs) and find that it has the highest affinity for the Lo phase in GUVs containing ergosterol. Our results suggest that natamycin specifically interacts with the sterol-induced ordered phase, in which it disrupts lipid packing and increases solvent accessibility. This property is particularly pronounced in ergosterol containing membranes, which could underlie the selective antifungal activity of natamycin.
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Affiliation(s)
- Vibeke Akkerman
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230, Odense M, Denmark
| | - Holger A. Scheidt
- Institute for Medical Physics and Biophysics, Leipzig University, Härtelstr. 16-18, D-04107, Leipzig, Germany
| | - Peter Reinholdt
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, DK-5230, Odense M, Denmark
| | - Mohammad Bashawat
- Department of Biology, Humboldt University Berlin, Invalidenstr. 43, D-10115, Berlin, Germany
| | - Maria Szomek
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230, Odense M, Denmark
| | - Max Lehmann
- Institute for Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476, Potsdam, Germany
| | - Pablo Wessig
- Institute for Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476, Potsdam, Germany
| | - Douglas F. Covey
- Department of Developmental Biology, Washington University, St. Louis, MO, 63110, USA
- Taylor Family Institute for Innovative Psychiatric Research, St. Louis, Missouri, USA
| | - Jacob Kongsted
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, DK-5230, Odense M, Denmark
| | - Peter Müller
- Department of Biology, Humboldt University Berlin, Invalidenstr. 43, D-10115, Berlin, Germany
| | - Daniel Wüstner
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, DK-5230, Odense M, Denmark
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17
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Fang M, Wang J, Fang S, Zuo X. Fabrication of carboxymethyl chitosan films for cheese packaging containing gliadin-carboxymethyl chitosan nanoparticles co-encapsulating natamycin and theaflavins. Int J Biol Macromol 2023; 246:125685. [PMID: 37406906 DOI: 10.1016/j.ijbiomac.2023.125685] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 06/15/2023] [Accepted: 07/02/2023] [Indexed: 07/07/2023]
Abstract
In this study, gliadin-carboxymethyl chitosan composite nanoparticles (GC NPs) co-encapsulated natamycin (Nata) and theaflavins (TFs) were constructed and added as an antioxidant, antifungal, and structural enhancer to carboxymethyl chitosan (CMCS) films. The stabilized GC NPs with a particle size of 160.7 ± 2.8 nm, a zeta potential of -29.0 ± 0.9 mV, and a protein content in the supernatant of 96 ± 1 % could be fabricated. Tests of pH and salt ions showed that the stability of NPs dispersion was based on electrostatic repulsion. Co-encapsulation of TFs enhanced the photostability of Nata and the antioxidant activity of the NPs dispersion. The interactions between gliadin with Nata and TFs were studied by molecular simulations. As a functional additive, the addition of Nata/TFs-GC NPs could improve the optical properties, mechanical properties, water-blocking capability, and antifungal and antioxidant activities of the CMCS films. The in-vivo test showed that the functional film could be used to inhibit the growth of Aspergillus niger on cheese.
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Affiliation(s)
- Meihan Fang
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Jialu Wang
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Sheng Fang
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China.
| | - Xiaobo Zuo
- Zhejiang Key Laboratory of Transboundary Applied Technology for Tea Resources, Hangzhou Tea Research Institute, CHINA COOP, Hangzhou 310016, China.
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18
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Brandelli A, Lopes NA, Pinilla CMB. Nanostructured Antimicrobials for Quality and Safety Improvement in Dairy Products. Foods 2023; 12:2549. [PMID: 37444286 DOI: 10.3390/foods12132549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 06/26/2023] [Accepted: 06/28/2023] [Indexed: 07/15/2023] Open
Abstract
In the food sector, one of the most important economic activities is the dairy industry, which has been facing many challenges in order to meet the increasing demand by consumers for natural and minimally processed products with high quality. In this sense, the application of innovative and emerging technologies can be an interesting alternative, for example, the use of nanotechnology in packaging and as delivery systems. This technology has the potential to improve the quality and safety of dairy products, representing an interesting approach for delivering food preservatives and improving the mechanical, barrier and functional properties of packaging. Several applications and promising results of nanostructures for dairy product preservation can be found throughout this review, including the use of metallic and polymeric nanoparticles, lipid-based nanostructures, nanofibers, nanofilms and nanocoatings. In addition, some relevant examples of the direct application of nanostructured natural antimicrobials in milk and cheese are presented and discussed, as well as the use of milk agar as a model for a preliminary test. Despite their high cost and the difficulties for scale-up, interesting results of these technologies in dairy foods and packaging materials have promoted a growing interest of the dairy industry.
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Affiliation(s)
- Adriano Brandelli
- Laboratory of Nanobiotechnology and Applied Microbiology, Department of Food Science, Federal University of Rio Grande do Sul, Porto Alegre 91501-970, Brazil
| | - Nathalie Almeida Lopes
- Laboratory of Nanobiotechnology and Applied Microbiology, Department of Food Science, Federal University of Rio Grande do Sul, Porto Alegre 91501-970, Brazil
| | - Cristian Mauricio Barreto Pinilla
- Laboratory of Nanobiotechnology and Applied Microbiology, Department of Food Science, Federal University of Rio Grande do Sul, Porto Alegre 91501-970, Brazil
- Dairy Technology Center, Institute of Food Technology, Campinas 13083-015, Brazil
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19
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Gou LJ, Liu TT, Zeng Q, Dong WR, Wang L, Long S, Su JT, Chen YX, Zhou G. Natamycin Has an Inhibitory Effect on Neofusicoccum parvum, the Pathogen of Chestnuts. Molecules 2023; 28:molecules28093707. [PMID: 37175119 PMCID: PMC10179887 DOI: 10.3390/molecules28093707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/17/2023] [Accepted: 04/24/2023] [Indexed: 05/15/2023] Open
Abstract
This research aimed to investigate natamycin's antifungal effect and its mechanism against the chestnut pathogen Neofusicoccum parvum. Natamycin's inhibitory effects on N. parvum were investigated using a drug-containing plate culture method and an in vivo assay in chestnuts and shell buckets. The antifungal mechanism of action of natamycin on N. parvum was investigated by conducting staining experiments of the fungal cell wall and cell membrane. Natamycin had a minimum inhibitory concentration (MIC) of 100 μg/mL and a minimum fungicidal concentration (MFC) of 200 μg/mL against N. parvum. At five times the MFC, natamycin had a strong antifungal effect on chestnuts in vivo, and it effectively reduced morbidity and extended the storage period. The cell membrane was the primary target of natamycin action against N. parvum. Natamycin inhibits ergosterol synthesis, disrupts cell membranes, and causes intracellular protein, nucleic acid, and other macromolecule leakages. Furthermore, natamycin can cause oxidative damage to the fungus, as evidenced by decreased superoxide dismutase and catalase enzyme activity. Natamycin exerts a strong antifungal effect on the pathogenic fungus N. parvum from chestnuts, mainly through the disruption of fungal cell membranes.
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Affiliation(s)
- Lin-Jing Gou
- Hubei Key Laboratory of Industrial Microbiology, Key Laboratory of Fermentation Engineering (Ministry of Education), Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei University of Technology, Wuhan 430068, China
- National "111" Center for Cellular Regulation and Molecular Pharmaceutics, School of Biological Engineering and Food, Hubei University of Technology, Wuhan 430068, China
| | - Tian-Tian Liu
- Hubei Key Laboratory of Industrial Microbiology, Key Laboratory of Fermentation Engineering (Ministry of Education), Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei University of Technology, Wuhan 430068, China
- National "111" Center for Cellular Regulation and Molecular Pharmaceutics, School of Biological Engineering and Food, Hubei University of Technology, Wuhan 430068, China
| | - Qi Zeng
- Hubei Key Laboratory of Industrial Microbiology, Key Laboratory of Fermentation Engineering (Ministry of Education), Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei University of Technology, Wuhan 430068, China
- National "111" Center for Cellular Regulation and Molecular Pharmaceutics, School of Biological Engineering and Food, Hubei University of Technology, Wuhan 430068, China
| | - Wan-Rong Dong
- Hubei Key Laboratory of Industrial Microbiology, Key Laboratory of Fermentation Engineering (Ministry of Education), Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei University of Technology, Wuhan 430068, China
| | - Lu Wang
- Hubei Key Laboratory of Industrial Microbiology, Key Laboratory of Fermentation Engineering (Ministry of Education), Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei University of Technology, Wuhan 430068, China
| | - Sha Long
- Hubei Key Laboratory of Industrial Microbiology, Key Laboratory of Fermentation Engineering (Ministry of Education), Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei University of Technology, Wuhan 430068, China
| | - Jiang-Tao Su
- Hubei Key Laboratory of Industrial Microbiology, Key Laboratory of Fermentation Engineering (Ministry of Education), Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei University of Technology, Wuhan 430068, China
| | - Yu-Xin Chen
- Hubei Key Laboratory of Industrial Microbiology, Key Laboratory of Fermentation Engineering (Ministry of Education), Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei University of Technology, Wuhan 430068, China
- National "111" Center for Cellular Regulation and Molecular Pharmaceutics, School of Biological Engineering and Food, Hubei University of Technology, Wuhan 430068, China
| | - Gao Zhou
- Hubei Key Laboratory of Industrial Microbiology, Key Laboratory of Fermentation Engineering (Ministry of Education), Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei University of Technology, Wuhan 430068, China
- National "111" Center for Cellular Regulation and Molecular Pharmaceutics, School of Biological Engineering and Food, Hubei University of Technology, Wuhan 430068, China
- Post-Doctoral Research Center of Mayinglong Pharmaceutical Group Co., Ltd., Wuhan 430064, China
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20
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Kamal I, Ashfaq UA, Hayat S, Aslam B, Sarfraz MH, Yaseen H, Rajoka MSR, Shah AA, Khurshid M. Prospects of antimicrobial peptides as an alternative to chemical preservatives for food safety. Biotechnol Lett 2023; 45:137-162. [PMID: 36504266 DOI: 10.1007/s10529-022-03328-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 11/10/2022] [Accepted: 11/17/2022] [Indexed: 12/14/2022]
Abstract
Antimicrobial peptides (AMPs) are a potential alternative to antimicrobial agents that have got considerable research interest owing to their significant role in the inhibition of bacterial pathogens. These AMPs can essentially inhibit the growth and multiplication of microbes through multiple mechanisms including disruption of cellular membranes, inhibition of cell wall biosynthesis, or affecting intracellular components and cell division. Moreover, AMPs are biocompatible and biodegradable therefore, they can be a good alternative to antimicrobial agents and chemical preservatives. A few of their features for example thermostability and high selectivity are quite appealing for their potential use in the food industry for food preservation to prevent the spoilage caused by microorganisms and foodborne pathogens. Despite these advantages, very few AMPs are being used at an industrial scale for food preservation as these peptides are quite vulnerable to external environmental factors which deter their practical applications and commercialization. The review aims to provide an outline of the mechanism of action of AMPs and their prospects as an alternative to chemical preservatives in the food industry. Further studies related to the structure-activity relationship of AMPs will help to expand the understanding of their mechanism of action and to determine specific conditions to increase their stability and applicability in food preservation.
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Affiliation(s)
- Iqra Kamal
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Usman Ali Ashfaq
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Sumreen Hayat
- Department of Microbiology, Government College University, Faisalabad, Pakistan
| | - Bilal Aslam
- Department of Microbiology, Government College University, Faisalabad, Pakistan
| | | | - Hamna Yaseen
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Muhammad Shahid Riaz Rajoka
- Laboratory of Animal Food Function, Graduate School of Agricultural Science, Tohoku University, Sendai, 980-8572, Japan
| | - Asad Ali Shah
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan.
| | - Mohsin Khurshid
- Department of Microbiology, Government College University, Faisalabad, Pakistan.
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21
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Torres-Rodriguez JA, Reyes-Pérez JJ, Quiñones-Aguilar EE, Hernandez-Montiel LG. Actinomycete Potential as Biocontrol Agent of Phytopathogenic Fungi: Mechanisms, Source, and Applications. PLANTS (BASEL, SWITZERLAND) 2022; 11:3201. [PMID: 36501241 PMCID: PMC9736024 DOI: 10.3390/plants11233201] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/09/2022] [Accepted: 11/17/2022] [Indexed: 06/17/2023]
Abstract
Synthetic fungicides have been the main control of phytopathogenic fungi. However, they cause harm to humans, animals, and the environment, as well as generating resistance in phytopathogenic fungi. In the last few decades, the use of microorganisms as biocontrol agents of phytopathogenic fungi has been an alternative to synthetic fungicide application. Actinomycetes isolated from terrestrial, marine, wetland, saline, and endophyte environments have been used for phytopathogenic fungus biocontrol. At present, there is a need for searching new secondary compounds and metabolites of different isolation sources of actinomycetes; however, little information is available on those isolated from other environments as biocontrol agents in agriculture. Therefore, the objective of this review is to compare the antifungal activity and the main mechanisms of action in actinomycetes isolated from different environments and to describe recent achievements of their application in agriculture. Although actinomycetes have potential as biocontrol agents of phytopathogenic fungi, few studies of actinomycetes are available of those from marine, saline, and wetland environments, which have equal or greater potential as biocontrol agents than isolates of actinomycetes from terrestrial environments.
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Affiliation(s)
- Juan A. Torres-Rodriguez
- Nanotechnology and Microbial Biocontrol Group, Centro de Investigaciones Biológicas del Noroeste, Av. Politécnico Nacional 195, Col. Playa Palo de Santa Rita Sur, La Paz 23090, Mexico
| | - Juan J. Reyes-Pérez
- Facultad de Ciencias Pecuarias, Universidad Técnica Estatal de Quevedo, Av. Quito km 1.5 vía a Santo Domingo, Quevedo 120501, Ecuador
| | - Evangelina E. Quiñones-Aguilar
- Centro de Investigaciones y Asistencia en Tecnología y Diseño del Estado de Jalisco, Camino Arenero, El Bajío del Arenal, Guadalajara 45019, Mexico
| | - Luis G. Hernandez-Montiel
- Nanotechnology and Microbial Biocontrol Group, Centro de Investigaciones Biológicas del Noroeste, Av. Politécnico Nacional 195, Col. Playa Palo de Santa Rita Sur, La Paz 23090, Mexico
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22
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Szomek M, Reinholdt P, Walther HL, Scheidt HA, Müller P, Obermaier S, Poolman B, Kongsted J, Wüstner D. Natamycin sequesters ergosterol and interferes with substrate transport by the lysine transporter Lyp1 from yeast. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2022; 1864:184012. [PMID: 35914570 DOI: 10.1016/j.bbamem.2022.184012] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 06/30/2022] [Accepted: 07/21/2022] [Indexed: 06/15/2023]
Abstract
Natamycin is a polyene macrolide, widely employed to treat fungal keratitis and other yeast infections as well as to protect food products against fungal molds. In contrast to other polyene macrolides, such as nystatin or amphotericin B, natamycin does not form pores in yeast membranes, and its mode of action is not well understood. Here, we have employed a variety of spectroscopic methods, computational modeling, and membrane reconstitution to study the molecular interactions of natamycin underlying its antifungal activity. We find that natamycin forms aggregates in an aqueous solution with strongly altered optical properties compared to monomeric natamycin. Interaction of natamycin with model membranes results in a concentration-dependent fluorescence increase which is more pronounced for ergosterol- compared to cholesterol-containing membranes up to 20 mol% sterol. Evidence for formation of specific ergosterol-natamycin complexes in the bilayer is provided. Using nuclear magnetic resonance (NMR) and electron spin resonance (ESR) spectroscopy, we find that natamycin sequesters sterols, thereby interfering with their well-known ability to order acyl chains in lipid bilayers. This effect is more pronounced for membranes containing the sterol of fungi, ergosterol, compared to those containing mammalian cholesterol. Natamycin interferes with ergosterol-dependent transport of lysine by the yeast transporter Lyp1, which we propose to be due to the sequestering of ergosterol, a mechanism that also affects other plasma membrane proteins. Our results provide a mechanistic explanation for the selective antifungal activity of natamycin, which can set the stage for rational design of novel polyenes in the future.
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Affiliation(s)
- Maria Szomek
- Department of Biochemistry and Molecular Biology, PhyLife, Physical Life Sciences, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Peter Reinholdt
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Hanna-Loisa Walther
- Department of Biochemistry and Molecular Biology, PhyLife, Physical Life Sciences, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Holger A Scheidt
- Institute for Medical Physics and Biophysics, University of Leipzig, Härtelstr. 16-18, 04107 Leipzig, Germany
| | - Peter Müller
- Department of Biology, Humboldt University Berlin, Invalidenstr. 43, 10115 Berlin, Germany
| | - Sebastian Obermaier
- Department of Biochemistry, University of Groningen, Nijenborgh 4, 9747 Groningen, the Netherlands
| | - Bert Poolman
- Department of Biochemistry, University of Groningen, Nijenborgh 4, 9747 Groningen, the Netherlands
| | - Jacob Kongsted
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Daniel Wüstner
- Department of Biochemistry and Molecular Biology, PhyLife, Physical Life Sciences, University of Southern Denmark, DK-5230 Odense M, Denmark.
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23
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Srisa A, Promhuad K, San H, Laorenza Y, Wongphan P, Wadaugsorn K, Sodsai J, Kaewpetch T, Tansin K, Harnkarnsujarit N. Antibacterial, Antifungal and Antiviral Polymeric Food Packaging in Post-COVID-19 Era. Polymers (Basel) 2022; 14:polym14194042. [PMID: 36235988 PMCID: PMC9573034 DOI: 10.3390/polym14194042] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 09/21/2022] [Accepted: 09/23/2022] [Indexed: 12/22/2022] Open
Abstract
Consumers are now more concerned about food safety and hygiene following the COVID-19 pandemic. Antimicrobial packaging has attracted increased interest by reducing contamination of food surfaces to deliver quality and safe food while maintaining shelf life. Active packaging materials to reduce contamination or inhibit viral activity in packaged foods and on packaging surfaces are mostly prepared using solvent casting, but very few materials demonstrate antiviral activity on foods of animal origin, which are important in the human diet. Incorporation of silver nanoparticles, essential oils and natural plant extracts as antimicrobial agents in/on polymeric matrices provides improved antifungal, antibacterial and antiviral properties. This paper reviews recent developments in antifungal, antibacterial and antiviral packaging incorporating natural or synthetic compounds using preparation methods including extrusion, solvent casting and surface modification treatment for surface coating and their applications in several foods (i.e., bakery products, fruits and vegetables, meat and meat products, fish and seafood and milk and dairy foods). Findings showed that antimicrobial material as films, coated films, coating and pouches exhibited efficient antimicrobial activity in vitro but lower activity in real food systems. Antimicrobial activity depends on (i) polar or non-polar food components, (ii) interactions between antimicrobial compounds and the polymer materials and (iii) interactions between environmental conditions and active films (i.e., relative humidity, oxygen and water vapor permeability and temperature) that impact the migration or diffusion of active compounds in foods. Knowledge gained from the plethora of existing studies on antimicrobial polymers can be effectively utilized to develop multifunctional antimicrobial materials that can protect food products and packaging surfaces from SARS-CoV-2 contamination.
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Affiliation(s)
- Atcharawan Srisa
- Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, 50 Ngam Wong Wan Rd., Latyao, Chatuchak, Bangkok 10900, Thailand
| | - Khwanchat Promhuad
- Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, 50 Ngam Wong Wan Rd., Latyao, Chatuchak, Bangkok 10900, Thailand
| | - Horman San
- Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, 50 Ngam Wong Wan Rd., Latyao, Chatuchak, Bangkok 10900, Thailand
| | - Yeyen Laorenza
- Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, 50 Ngam Wong Wan Rd., Latyao, Chatuchak, Bangkok 10900, Thailand
| | - Phanwipa Wongphan
- Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, 50 Ngam Wong Wan Rd., Latyao, Chatuchak, Bangkok 10900, Thailand
| | - Kiattichai Wadaugsorn
- Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, 50 Ngam Wong Wan Rd., Latyao, Chatuchak, Bangkok 10900, Thailand
| | - Janenutch Sodsai
- Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, 50 Ngam Wong Wan Rd., Latyao, Chatuchak, Bangkok 10900, Thailand
| | - Thitiporn Kaewpetch
- Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, 50 Ngam Wong Wan Rd., Latyao, Chatuchak, Bangkok 10900, Thailand
| | - Kittichai Tansin
- Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, 50 Ngam Wong Wan Rd., Latyao, Chatuchak, Bangkok 10900, Thailand
| | - Nathdanai Harnkarnsujarit
- Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, 50 Ngam Wong Wan Rd., Latyao, Chatuchak, Bangkok 10900, Thailand
- Center for Advanced Studies for Agriculture and Food, Kasetsart University, 50 Ngam Wong Wan Rd., Latyao, Chatuchak, Bangkok 10900, Thailand
- Correspondence: ; Tel.: +66-2-562-5045
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24
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Han P, Chen Z, Liu Y, Ma A, Li S, Jia Y. An accurate strategy for pointing the key biocatalytic sites of bre2691A protein for modification of the brevilaterin from Brevibacillus laterosporus. Microb Cell Fact 2022; 21:196. [PMID: 36123650 PMCID: PMC9484153 DOI: 10.1186/s12934-022-01918-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 09/05/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Brevilaterin A-E, a novel class of multi-component cationic antimicrobial lipopeptides, were biosynthesized by a non-ribosomal peptides synthetase (NRPS) in Brevibacillus laterosporus. However, the antimicrobial abilities of different brevilaterin components varied greatly, and this multi-component form was impeding the scale production of the excellent component, and a little information about the brevilaterin biosynthesis mechanism was available to apply in brevilaterin design modification. In this study, we used an accurate strategy that revealed the reason for producing multi-component was the substrate selectivity of bre2691A protein being not enough specific and pinpointed the key design sites to make the specificity of bre2691A enhanced. RESULTS Bioinformatic analysis revealed that the biocatalytic site of bre2691A, which was an adenylation domain catalyzed and recognized methionine, leucine, valine and isoleucine and thus introduced them into brevilaterins and caused different components (brevilaterin A-E), was consisted of A1 ~ A10 residues named specificity-conferring code. Coupling molecular docking simulations with mutation studies identified A2 and A7 as critical residues, where determined substrate-specificity and impacted activity. The in virto activity assay showed that the A2 mutant (G193A) would lose activity against methionine and have no effect on the other three amino acids, the A7 mutant (G285C) would enhance the catalytic activity against four substrates, especially against leucine at almost a double activity. When the A2 and A7 residues were synchronously mutated, this mutant would be more focused on recognizing leucine. CONCLUSIONS An accurate strategy that combined with bioinformatics and site-directed mutation techniques revealed the pivotal site A2 and A7 positions of bre2691A protein that could be used to design and modify brevilaterins, thus further providing a reasonable direction of genetic engineering for Brevibacillus laterosporus. A deeper understanding of the function of crucial residues in the adenylation domain would make it get more accurate and highly efficient design and more fully utilized. Furthermore, it would contribute to biotechnological applications, namely for the large centralized synthesis of antimicrobial peptides, or for the optimization of their production.
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Affiliation(s)
- Panpan Han
- School of Food and Health, Beijing Technology and Business University, No.33 Fucheng Road, Haidian District, Beijing, 100048, China
| | - Zhou Chen
- School of Food and Health, Beijing Technology and Business University, No.33 Fucheng Road, Haidian District, Beijing, 100048, China
| | - Yangliu Liu
- School of Food and Health, Beijing Technology and Business University, No.33 Fucheng Road, Haidian District, Beijing, 100048, China
| | - Aijin Ma
- School of Food and Health, Beijing Technology and Business University, No.33 Fucheng Road, Haidian District, Beijing, 100048, China
| | - Siting Li
- School of Food and Health, Beijing Technology and Business University, No.33 Fucheng Road, Haidian District, Beijing, 100048, China
| | - Yingmin Jia
- School of Food and Health, Beijing Technology and Business University, No.33 Fucheng Road, Haidian District, Beijing, 100048, China.
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25
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Immunoassay for Natamycin Trace Screening: Bread, Wine and Other Edibles Analysis. BIOSENSORS 2022; 12:bios12070493. [PMID: 35884296 PMCID: PMC9312873 DOI: 10.3390/bios12070493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 06/30/2022] [Accepted: 07/04/2022] [Indexed: 11/16/2022]
Abstract
The antifungal drug natamycin (NAT) is widely used in medicine and in the food industry as preservative E235 for a wide variety of foods. The risk of the development of resistance to NAT and its spread in relation to other polyene antibiotics is fraught with the emergence of incurable infections. This work is devoted to the development of an immunoassay to investigate the prevalence of NAT use for food preservation. Two immunogen designs based on tetanus toxoid, conjugated to NAT through different sites of hapten molecules, were compared in antibody generation. Assay formats using heterologous coating antigens were superior for both antibodies. The ELISA variant demonstrated the highest sensitivity (IC50 = 0.12 ng/mL), and a limit of detection of 0.02 ng/mL was selected for NAT determination. The optimized extraction procedure provided a recovery rate of 72–106% for various food matrixes with variations below 12%. Cyclodextrins, as well as NAT–cyclodextrin complex formulations, showed no interference with the quantification of NAT. One hundred and six food product brands, including baked goods, wines, beers, drinks, sauces, and yogurts, were tested to assess the prevalence of the undeclared use of NAT as a preservative. The screening examination revealed three positive yogurts with an undeclared NAT incorporation of 1.1–9.3 mg/kg.
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26
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Wang XH, Song XJ, Zhang DJ, Li ZJ, Wang HJ. Preparation and characterization of natamycin-incorporated agar film and its application on preservation of strawberries. Food Packag Shelf Life 2022. [DOI: 10.1016/j.fpsl.2022.100863] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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27
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Liu XF, Wang JX, Chen XA, Liu Y, Li YQ. Activation and Characterization of Lanthomicins A-C by Promoter Engineering in Streptomyces chattanoogensis L10. Front Microbiol 2022; 13:902990. [PMID: 35620094 PMCID: PMC9127795 DOI: 10.3389/fmicb.2022.902990] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 04/11/2022] [Indexed: 11/13/2022] Open
Abstract
The emergence of drug resistance highlights the importance of new drug discovery. Microbial secondary metabolites encoded in biosynthetic gene clusters (BGCs) are a prolific source of drugs, whereas most of these BGCs are cryptic. Thus, taking strategies to activate these cryptic BGCs is of great importance for potential drug discovery. In this work, three novel pentangular polyphenols lanthomicin A-C were identified by activating a cryptic aromatic polyketide BGC through promoter engineering combined with optimization of fermentation conditions. We further confirmed the involvement of lanthomicin (ltm) BGC in biosynthesis by CRISPR-Cpf1-assisted gene editing. Based on functional analysis of homologous genes, a putative biosynthetic pathway was proposed for the three lanthomicins. Particularly, lanthomicin A showed antiproliferative activity with IC50 0.17 μM for lung cancer cell line A-549. The discovery of lanthomicins brings new members to the pentangular polyphenol subclade of aromatic polyketide and demonstrates the potential of Streptomyces as a source for drug discovery.
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Affiliation(s)
- Xiao-Fang Liu
- First Affiliated Hospital and Institute of Pharmaceutical Biotechnology, Zhejiang University School of Medicine, Hangzhou, China.,Zhejiang Provincial Key Laboratory for Microbiol Biochemistry and Metabolic Engineering, Hangzhou, China
| | - Jun-Xiao Wang
- First Affiliated Hospital and Institute of Pharmaceutical Biotechnology, Zhejiang University School of Medicine, Hangzhou, China
| | - Xin-Ai Chen
- First Affiliated Hospital and Institute of Pharmaceutical Biotechnology, Zhejiang University School of Medicine, Hangzhou, China.,Zhejiang Provincial Key Laboratory for Microbiol Biochemistry and Metabolic Engineering, Hangzhou, China
| | - Yu Liu
- College of Life Science, Zhejiang University, Hangzhou, China
| | - Yong-Quan Li
- First Affiliated Hospital and Institute of Pharmaceutical Biotechnology, Zhejiang University School of Medicine, Hangzhou, China.,Zhejiang Provincial Key Laboratory for Microbiol Biochemistry and Metabolic Engineering, Hangzhou, China
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