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Biji CA, Balde A, Nazeer RA. Anti-inflammatory peptide therapeutics and the role of sulphur containing amino acids (cysteine and methionine) in inflammation suppression: A review. Inflamm Res 2024; 73:1203-1221. [PMID: 38769154 DOI: 10.1007/s00011-024-01893-6] [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: 02/01/2024] [Revised: 05/09/2024] [Accepted: 05/10/2024] [Indexed: 05/22/2024] Open
Abstract
BACKGROUND Inflammation serves as our body's immune response to combat infections, pathogens, viruses, and external stimuli. Inflammation can be classified into two types: acute inflammation and chronic inflammation. Non-steroidal anti-inflammatory medications (NSAIDs) are used to treat both acute and chronic inflammatory disorders. However, these treatments have various side effects such as reduced healing efficiency, peptic ulcers, gastrointestinal toxicities, etc. METHOD: This review assesses the potential of anti-inflammatory peptides (AIPs) derived from various natural sources, such as algae, fungi, plants, animals, and marine organisms. Focusing on peptides rich in cysteines and methionine, sulphur-containing amino acids known for their role in suppression of inflammation. RESULT Due to their varied biological activity, ability to penetrate cells, and low cytotoxicity, bioactive peptides have garnered interest as possible therapeutic agents. The utilisation of AIPs has shown great potential in the treatment of disorders associated with inflammation. AIPs can be obtained from diverse natural sources such as algae, fungi, plants, and animals. Cysteine and methionine are sulphur-containing amino acids that aid in the elimination of free radicals, hence assisting in the treatment of inflammatory diseases. CONCLUSION This review specifically examines several sources of AIPs including peptides that contain numerous cysteines and methionine. In addition, the biological characteristics of these amino acids and advancements in peptide delivery are also discussed.
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Affiliation(s)
- Catherin Ann Biji
- Biopharmaceuticals Lab, Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603 203, Tamilnadu, India
| | - Akshad Balde
- Biopharmaceuticals Lab, Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603 203, Tamilnadu, India
| | - Rasool Abdul Nazeer
- Biopharmaceuticals Lab, Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603 203, Tamilnadu, India.
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2
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Pei X, Lei Y, Zhang H. Transcriptional regulators of secondary metabolite biosynthesis in Streptomyces. World J Microbiol Biotechnol 2024; 40:156. [PMID: 38587708 DOI: 10.1007/s11274-024-03968-2] [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: 02/14/2024] [Accepted: 03/25/2024] [Indexed: 04/09/2024]
Abstract
In the post-genome era, great progress has been made in metabolic engineering using recombinant DNA technology to enhance the production of high-value products by Streptomyces. With the development of microbial genome sequencing techniques and bioinformatic tools, a growing number of secondary metabolite (SM) biosynthetic gene clusters in Streptomyces and their biosynthetic logics have been uncovered and elucidated. In order to increase our knowledge about transcriptional regulators in SM of Streptomyces, this review firstly makes a comprehensive summary of the characterized factors involved in enhancing SM production and awakening SM biosynthesis. Future perspectives on transcriptional regulator engineering for new SM biosynthesis by Streptomyces are also provided.
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Affiliation(s)
- Xinwei Pei
- School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Yunyun Lei
- School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Huawei Zhang
- School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, 310014, China.
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3
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Research Progress in Anti-Inflammatory Bioactive Substances Derived from Marine Microorganisms, Sponges, Algae, and Corals. Mar Drugs 2021; 19:md19100572. [PMID: 34677471 PMCID: PMC8538560 DOI: 10.3390/md19100572] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 10/04/2021] [Accepted: 10/10/2021] [Indexed: 12/24/2022] Open
Abstract
Inflammation is the body’s defense reaction in response to stimulations and is the basis of various physiological and pathological processes. However, chronic inflammation is undesirable and closely related to the occurrence and development of diseases. The ocean gives birth to unique and diverse bioactive substances, which have gained special attention and been a focus for anti-inflammatory drug development. So far, numerous promising bioactive substances have been obtained from various marine organisms such as marine bacteria and fungi, sponges, algae, and coral. This review covers 71 bioactive substances described during 2015–2020, including the structures (65 of which), species sources, evaluation models and anti-inflammatory activities of these substances. This review aims to provide some reference for the research progress of marine-organism-derived anti-inflammatory metabolites and give more research impetus for their conversion to novel anti-inflammatory drugs.
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4
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Mai PY, Le Goff G, Poupon E, Lopes P, Moppert X, Costa B, Beniddir MA, Ouazzani J. Solid-Phase Extraction Embedded Dialysis (SPEED), an Innovative Procedure for the Investigation of Microbial Specialized Metabolites. Mar Drugs 2021; 19:md19070371. [PMID: 34206861 PMCID: PMC8304039 DOI: 10.3390/md19070371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 06/22/2021] [Accepted: 06/23/2021] [Indexed: 11/16/2022] Open
Abstract
Solid-phase extraction embedded dialysis (SPEED technology) is an innovative procedure developed to physically separate in-situ, during the cultivation, the mycelium of filament forming microorganisms, such as actinomycetes and fungi, and the XAD-16 resin used to trap the secreted specialized metabolites. SPEED consists of an external nylon cloth and an internal dialysis tube containing the XAD resin. The dialysis barrier selects the molecular weight of the trapped compounds, and prevents the aggregation of biomass or macromolecules on the XAD beads. The external nylon promotes the formation of a microbial biofilm, making SPEED a biofilm supported cultivation process. SPEED technology was applied to the marine Streptomyces albidoflavus 19-S21, isolated from a core of a submerged Kopara sampled at 20 m from the border of a saltwater pond. The chemical space of this strain was investigated effectively using a dereplication strategy based on molecular networking and in-depth chemical analysis. The results highlight the impact of culture support on the molecular profile of Streptomyces albidoflavus 19-S21 secondary metabolites.
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Affiliation(s)
- Phuong-Y. Mai
- CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 1, Avenue de la Terrasse, 91190 Gif-sur-Yvette, France; (P.-Y.M.); (G.L.G.); (P.L.)
- Équipe “Chimie des Substances Naturelles” BioCIS, CNRS, Université Paris-Saclay, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France; (E.P.); (M.A.B.)
| | - Géraldine Le Goff
- CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 1, Avenue de la Terrasse, 91190 Gif-sur-Yvette, France; (P.-Y.M.); (G.L.G.); (P.L.)
| | - Erwan Poupon
- Équipe “Chimie des Substances Naturelles” BioCIS, CNRS, Université Paris-Saclay, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France; (E.P.); (M.A.B.)
| | - Philippe Lopes
- CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 1, Avenue de la Terrasse, 91190 Gif-sur-Yvette, France; (P.-Y.M.); (G.L.G.); (P.L.)
| | - Xavier Moppert
- PACIFIC BIOTECH SAS, BP 140 289, 98 701 Arue, Tahiti, French Polynesia; (X.M.); (B.C.)
| | - Bernard Costa
- PACIFIC BIOTECH SAS, BP 140 289, 98 701 Arue, Tahiti, French Polynesia; (X.M.); (B.C.)
| | - Mehdi A. Beniddir
- Équipe “Chimie des Substances Naturelles” BioCIS, CNRS, Université Paris-Saclay, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France; (E.P.); (M.A.B.)
| | - Jamal Ouazzani
- CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 1, Avenue de la Terrasse, 91190 Gif-sur-Yvette, France; (P.-Y.M.); (G.L.G.); (P.L.)
- Correspondence: ; Tel.: +33-6-82-81-65-90
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5
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Mayer AMS, Guerrero AJ, Rodríguez AD, Taglialatela-Scafati O, Nakamura F, Fusetani N. Marine Pharmacology in 2016-2017: Marine Compounds with Antibacterial, Antidiabetic, Antifungal, Anti-Inflammatory, Antiprotozoal, Antituberculosis and Antiviral Activities; Affecting the Immune and Nervous Systems, and Other Miscellaneous Mechanisms of Action. Mar Drugs 2021; 19:49. [PMID: 33494402 PMCID: PMC7910995 DOI: 10.3390/md19020049] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 01/13/2021] [Accepted: 01/15/2021] [Indexed: 12/12/2022] Open
Abstract
The review of the 2016-2017 marine pharmacology literature was prepared in a manner similar as the 10 prior reviews of this series. Preclinical marine pharmacology research during 2016-2017 assessed 313 marine compounds with novel pharmacology reported by a growing number of investigators from 54 countries. The peer-reviewed literature reported antibacterial, antifungal, antiprotozoal, antituberculosis, and antiviral activities for 123 marine natural products, 111 marine compounds with antidiabetic and anti-inflammatory activities as well as affecting the immune and nervous system, while in contrast 79 marine compounds displayed miscellaneous mechanisms of action which upon further investigation may contribute to several pharmacological classes. Therefore, in 2016-2017, the preclinical marine natural product pharmacology pipeline generated both novel pharmacology as well as potentially new lead compounds for the growing clinical marine pharmaceutical pipeline, and thus sustained with its contributions the global research for novel and effective therapeutic strategies for multiple disease categories.
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Affiliation(s)
- Alejandro M. S. Mayer
- Department of Pharmacology, College of Graduate Studies, Midwestern University, 555 31st Street, Downers Grove, IL 60515, USA;
| | - Aimee J. Guerrero
- Department of Pharmacology, College of Graduate Studies, Midwestern University, 555 31st Street, Downers Grove, IL 60515, USA;
| | - Abimael D. Rodríguez
- Molecular Sciences Research Center, University of Puerto Rico, 1390 Ponce de León Avenue, San Juan, PR 00926, USA;
| | | | - Fumiaki Nakamura
- Department of Chemistry and Biochemistry, Graduate School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan;
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6
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Sánchez-Suárez J, Coy-Barrera E, Villamil L, Díaz L. Streptomyces-Derived Metabolites with Potential Photoprotective Properties-A Systematic Literature Review and Meta-Analysis on the Reported Chemodiversity. Molecules 2020; 25:E3221. [PMID: 32679651 PMCID: PMC7397340 DOI: 10.3390/molecules25143221] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 07/01/2020] [Accepted: 07/07/2020] [Indexed: 02/07/2023] Open
Abstract
Sun overexposure is associated with the development of diseases that primarily affect the skin, which can lead to skin cancer. Among the main measures of photoprotection is the use of sunscreens. However, there is currently concern about the reported harmful effects to both humans and the environment due to several of the sunscreen ingredients available on the market. For this reason, the search for and development of new agents with photoprotective properties is required. In searching for these metabolites, researchers have turned their attention to microbial sources, especially the microbiota in unusual hostile environments. Among the diverse microorganisms available in nature, Actinobacteria and specifically Streptomyces, have been shown to be a source of metabolites with various biological activities of interest, such as antimicrobial, antitumor and immunomodulator activities. Herein, we present the results of a systematic review of the literature in which Streptomyces isolates were studied as a source of compounds with photoprotective properties. A meta-analysis of the structure-property and structure-activity relationships of those metabolites identified in the qualitative analysis phase was also carried out. These findings indicate that Streptomyces are a source of metabolites with potential applications in the development of new, safe and more eco-friendly sunscreens.
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Affiliation(s)
- Jeysson Sánchez-Suárez
- Doctoral Program of Biosciences, School of Engineering, Universidad de La Sabana, Chía 140013, Cundinamarca, Colombia; (J.S.-S.); (L.V.)
- Bioprospecting Research Group, School of Engineering, Universidad de La Sabana, Chía 140013, Cundinamarca, Colombia
| | - Ericsson Coy-Barrera
- Bioorganic Chemistry Laboratory, Universidad Militar Nueva Granada, Bogotá 110111, Cajicá, Cundinamarca, Colombia;
| | - Luisa Villamil
- Doctoral Program of Biosciences, School of Engineering, Universidad de La Sabana, Chía 140013, Cundinamarca, Colombia; (J.S.-S.); (L.V.)
| | - Luis Díaz
- Doctoral Program of Biosciences, School of Engineering, Universidad de La Sabana, Chía 140013, Cundinamarca, Colombia; (J.S.-S.); (L.V.)
- Bioprospecting Research Group, School of Engineering, Universidad de La Sabana, Chía 140013, Cundinamarca, Colombia
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7
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Yang C, Qian R, Xu Y, Yi J, Gu Y, Liu X, Yu H, Jiao B, Lu X, Zhang W. Marine Actinomycetes-derived Natural Products. Curr Top Med Chem 2020; 19:2868-2918. [PMID: 31724505 DOI: 10.2174/1568026619666191114102359] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 09/02/2019] [Accepted: 09/22/2019] [Indexed: 12/12/2022]
Abstract
Actinomycetes is an abundant resource for discovering a large number of lead compounds, which play an important role in microbial drug discovery. Compared to terrestrial microorganisms, marine actinomycetes have unique metabolic pathways because of their special living environment, which has the potential to produce a variety of bioactive substances. In this paper, secondary metabolites isolated from marine actinomycetes are reviewed (2013-2018), most of which exhibited cytotoxic, antibacterial, and antiviral biological activities.
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Affiliation(s)
- Chengfang Yang
- College of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
| | - Rui Qian
- College of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
| | - Yao Xu
- College of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
| | - Junxi Yi
- College of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
| | - Yiwen Gu
- College of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
| | - Xiaoyu Liu
- College of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
| | - Haobing Yu
- College of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
| | - Binghua Jiao
- College of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
| | - Xiaoling Lu
- College of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
| | - Wei Zhang
- Centre for Marine Bioproducts Development, Flinders University, Adelaide, Australia.,Department of Medical Biotechnology, School of Medicine, Flinders University, Adelaide, Australia
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8
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Metagenomics Approaches in Discovery and Development of New Bioactive Compounds from Marine Actinomycetes. Curr Microbiol 2019; 77:645-656. [PMID: 31069462 DOI: 10.1007/s00284-019-01698-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 04/26/2019] [Indexed: 02/06/2023]
Abstract
Marine actinomycetes are prolific sources of marine drug discovery system contributing for several bioactive compounds of biomedical prominence. Metagenomics, a culture-independent technique through its sequence- and function-based screening has led to the discovery and synthesis of numerous biologically significant compounds like polyketide synthase, Non-ribosomal peptide synthetase, antibiotics, and biocatalyst. While metagenomics offers different advantages over conventional sequencing techniques, they also have certain limitations including bias classification, non-availability of quality DNA samples, heterologous expression, and host selection. The assimilation of advanced amplification and screening methods such as φ29 DNA polymerase, Next-Generation Sequencing, Cosmids, and recent bioinformatics tools like automated genome mining, anti-SMASH have shown promising results to overcome these constrains. Consequently, functional genomics and bioinformatics along with synthetic biology will be crucial for the success of the metagenomic approach and indeed for exploring new possibilities among the microbial consortia for the future drug discovery process.
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9
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Abstract
Covering: January to December 2017This review covers the literature published in 2017 for marine natural products (MNPs), with 740 citations (723 for the period January to December 2017) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1490 in 477 papers for 2017), together with the relevant biological activities, source organisms and country of origin. Reviews, biosynthetic studies, first syntheses, and syntheses that led to the revision of structures or stereochemistries, have been included. Geographic distributions of MNPs at a phylogenetic level are reported.
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Affiliation(s)
- Anthony R Carroll
- School of Environment and Science, Griffith University, Gold Coast, Australia. and Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Brent R Copp
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Rohan A Davis
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Robert A Keyzers
- Centre for Biodiscovery, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
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10
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Usuki Y, Ishii S, Ijiri M, Yoshida KI, Satoh T, Horigome S, Yoshida I, Mishima T, Fujita KI. Evaluation of Inhibitory Activities of UK-2A, an Antimycin-Type Antibiotic, and Its Synthetic Analogues against the Production of Anti-inflammatory Cytokine IL-4. JOURNAL OF NATURAL PRODUCTS 2018; 81:2590-2594. [PMID: 30417645 DOI: 10.1021/acs.jnatprod.8b00559] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The inhibitory activities of the antimycin-class antibiotics UK-2A, antimycin A, and splenocin B against the production of anti-inflammatory cytokine IL-4, which is related to IgE-mediated allergic responses in rat basophilic leukemia (RBL-2H3) cells, were evaluated. Although antimycin A and splenocin B showed cytotoxicity at concentrations at which IL-4 release from the cells was restricted, UK-2A was found to restrict IL-4 release without cytotoxicity. Three UK-2A analogues (4-6) were then synthesized and assessed. Compound 5 restricted IL-4 release dose-dependently without cytotoxicity, and its effect was more potent than that of UK-2A.
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Affiliation(s)
- Yoshinosuke Usuki
- Department of Chemistry, Graduate School of Science , Osaka City University , 3-3-138 Sugimoto , Sumiyoshi, Osaka 558-8585 , Japan
| | - Saho Ishii
- Department of Chemistry, Graduate School of Science , Osaka City University , 3-3-138 Sugimoto , Sumiyoshi, Osaka 558-8585 , Japan
| | - Minako Ijiri
- Department of Chemistry, Graduate School of Science , Osaka City University , 3-3-138 Sugimoto , Sumiyoshi, Osaka 558-8585 , Japan
| | - Ken-Ichi Yoshida
- Department of Chemistry, Graduate School of Science , Osaka City University , 3-3-138 Sugimoto , Sumiyoshi, Osaka 558-8585 , Japan
| | - Tetsuya Satoh
- Department of Chemistry, Graduate School of Science , Osaka City University , 3-3-138 Sugimoto , Sumiyoshi, Osaka 558-8585 , Japan
| | - Satoru Horigome
- Saito Laboratory , Japan Food Research Laboratories , 4-41 Saito-asagi 7-chome , Ibaraki-shi, Osaka 567-0085 , Japan
| | - Izumi Yoshida
- Saito Laboratory , Japan Food Research Laboratories , 4-41 Saito-asagi 7-chome , Ibaraki-shi, Osaka 567-0085 , Japan
| | - Takashi Mishima
- Saito Laboratory , Japan Food Research Laboratories , 4-41 Saito-asagi 7-chome , Ibaraki-shi, Osaka 567-0085 , Japan
| | - Ken-Ichi Fujita
- Department of Biology, Graduate School of Science , Osaka City University , 3-3-138 Sugimoto , Sumiyoshi, Osaka 558-8585 , Japan
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11
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Baral B, Akhgari A, Metsä-Ketelä M. Activation of microbial secondary metabolic pathways: Avenues and challenges. Synth Syst Biotechnol 2018; 3:163-178. [PMID: 30345402 PMCID: PMC6190515 DOI: 10.1016/j.synbio.2018.09.001] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 08/28/2018] [Accepted: 09/04/2018] [Indexed: 12/21/2022] Open
Abstract
Microbial natural products are a tremendous source of new bioactive chemical entities for drug discovery. Next generation sequencing has revealed an unprecedented genomic potential for production of secondary metabolites by diverse micro-organisms found in the environment and in the microbiota. Genome mining has further led to the discovery of numerous uncharacterized 'cryptic' metabolic pathways in the classical producers of natural products such as Actinobacteria and fungi. These biosynthetic gene clusters may code for improved biologically active metabolites, but harnessing the full genetic potential has been hindered by the observation that many of the pathways are 'silent' under laboratory conditions. Here we provide an overview of the various biotechnological methodologies, which can be divided to pleiotropic, biosynthetic gene cluster specific, and targeted genome-wide approaches that have been developed for the awakening of microbial secondary metabolic pathways.
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Affiliation(s)
| | | | - Mikko Metsä-Ketelä
- Department of Biochemistry, University of Turku, FIN-20014, Turku, Finland
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12
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Xu D, Han L, Li C, Cao Q, Zhu D, Barrett NH, Harmody D, Chen J, Zhu H, McCarthy PJ, Sun X, Wang G. Bioprospecting Deep-Sea Actinobacteria for Novel Anti-infective Natural Products. Front Microbiol 2018; 9:787. [PMID: 29760684 PMCID: PMC5936781 DOI: 10.3389/fmicb.2018.00787] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 04/06/2018] [Indexed: 11/13/2022] Open
Abstract
The global prevalence of drug resistance has created an urgent need for the discovery of novel anti-infective drugs. The major source of antibiotics in current clinical practice is terrestrial actinobacteria; the less-exploited deep-sea actinobacteria may serve as an unprecedented source of novel natural products. In this study, we evaluated 50 actinobacteria strains derived from diverse deep water sponges and environmental niches for their anti-microbial activities against a panel of pathogens including Candida albicans, Clostridium difficile, Staphylococcus aureus, and methicillin-resistant S. aureus (MRSA), and Pseudomonas aeruginosa. More than half of the tested strains (27) were identified as active in at least one assay. The rare earth salt lanthanum chloride (LaCl3) was shown to be as an effective elicitor. Among the 27 strains, the anti-microbial activity of 15 were induced or enhanced by the addition of LaCl3. This part of study focused on one strain R818, in which potent antifungal activity was induced by the addition of LaCl3. We found that the LaCl3-activated metabolites in R818 are likely antimycin-type compounds. One of them, compound 1, has been purified. Spectroscopic analyses including HR-MS and 1D NMR indicated that this compound is urauchimycin D. The antifungal activity of compound 1 was confirmed with a minimal inhibitory concentration (MIC) of 25 μg/mL; the purified compound also showed a moderate activity against C. difficile. Additional notable strains are: strain N217 which showed both antifungal and antibacterial (including P. aeruginosa) activities and strain M864 which showed potent activity against C. difficile with an MIC value (0.125 μg/mL) lower than those of vancomycin and metronidazole. Our preliminary studies show that deep-sea actinobacteria is a promising source of anti-infective natural products.
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Affiliation(s)
- Dongbo Xu
- Harbor Branch Oceanographic Institute, Florida Atlantic University, Fort Pierce, FL, United States
| | - Linna Han
- Harbor Branch Oceanographic Institute, Florida Atlantic University, Fort Pierce, FL, United States
| | - Chunhui Li
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL, United States.,Infection Control Center, Xiangya Hospital, Central South University, Changsha, China
| | - Qi Cao
- Harbor Branch Oceanographic Institute, Florida Atlantic University, Fort Pierce, FL, United States
| | - Duolong Zhu
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - Nolan H Barrett
- Harbor Branch Oceanographic Institute, Florida Atlantic University, Fort Pierce, FL, United States
| | - Dedra Harmody
- Harbor Branch Oceanographic Institute, Florida Atlantic University, Fort Pierce, FL, United States
| | - Jing Chen
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, United States
| | - Haining Zhu
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, United States
| | - Peter J McCarthy
- Harbor Branch Oceanographic Institute, Florida Atlantic University, Fort Pierce, FL, United States
| | - Xingmin Sun
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - Guojun Wang
- Harbor Branch Oceanographic Institute, Florida Atlantic University, Fort Pierce, FL, United States
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