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Grundmann CO, Guzman J, Vilcinskas A, Pupo MT. The insect microbiome is a vast source of bioactive small molecules. Nat Prod Rep 2024; 41:935-967. [PMID: 38411238 DOI: 10.1039/d3np00054k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Covering: September 1964 to June 2023Bacteria and fungi living in symbiosis with insects have been studied over the last sixty years and found to be important sources of bioactive natural products. Not only classic producers of secondary metabolites such as Streptomyces and other members of the phylum Actinobacteria but also numerous bacteria from the phyla Proteobacteria and Firmicutes and an impressive array of fungi (usually pathogenic) serve as the source of a structurally diverse number of small molecules with important biological activities including antimicrobial, cytotoxic, antiparasitic and specific enzyme inhibitors. The insect niche is often the exclusive provider of microbes producing unique types of biologically active compounds such as gerumycins, pederin, dinactin, and formicamycins. However, numerous insects still have not been described taxonomically, and in most cases, the study of their microbiota is completely unexplored. In this review, we present a comprehensive survey of 553 natural products produced by microorganisms isolated from insects by collating and classifying all the data according to the type of compound (rather than the insect or microbial source). The analysis of the correlations among the metadata related to insects, microbial partners, and their produced compounds provides valuable insights into the intricate dynamics between insects and their symbionts as well as the impact of their metabolites on these relationships. Herein, we focus on the chemical structure, biosynthesis, and biological activities of the most relevant compounds.
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Affiliation(s)
| | - Juan Guzman
- Department of Bioresources, Fraunhofer Institute for Molecular Biology and Applied Ecology, Giessen, Germany
| | - Andreas Vilcinskas
- Department of Bioresources, Fraunhofer Institute for Molecular Biology and Applied Ecology, Giessen, Germany
- Institute for Insect Biotechnology, Justus-Liebig-University, Giessen, Germany
| | - Mônica Tallarico Pupo
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
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2
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Chavarría-Pizarro L, Núñez-Montero K, Gutiérrez-Araya M, Watson-Guido W, Rivera-Méndez W, Pizarro-Cerdá J. Novel strains of Actinobacteria associated with neotropical social wasps (Vespidae; Polistinae, Epiponini) with antimicrobial potential for natural product discovery. FEMS MICROBES 2024; 5:xtae005. [PMID: 38476864 PMCID: PMC10929769 DOI: 10.1093/femsmc/xtae005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 02/16/2024] [Accepted: 02/23/2024] [Indexed: 03/14/2024] Open
Abstract
Antimicrobial resistance has been considered a public health threat. The World Health Organization has warned about the urgency of detecting new antibiotics from novel sources. Social insects could be crucial in the search for new antibiotic metabolites, as some of them survive in places that favor parasite development. Recent studies have shown the potential of social insects to produce antimicrobial metabolites (e.g. ants, bees, and termites). However, most groups of social wasps remain unstudied. Here, we explored whether Actinobacteria are associated with workers in the Neotropical Social Wasps (Epiponini) of Costa Rica and evaluated their putative inhibitory activity against other bacteria. Most isolated strains (67%) have antagonistic effects, mainly against Bacillus thuringensis and Escherichia coli ATCC 25992. Based on genome analysis, some inhibitory Actinobacteria showed biosynthetic gene clusters (BGCs) related to the production of antimicrobial molecules such as Selvamycin, Piericidin A1, and Nystatin. The Actinobacteria could be associated with social wasps to produce antimicrobial compounds. For these reasons, we speculate that Actinobacteria associated with social wasps could be a novel source of antimicrobial compounds, mainly against Gram-negative bacteria.
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Affiliation(s)
- Laura Chavarría-Pizarro
- Instituto Tecnológico de Costa Rica, Escuela de Biología-Centro de Investigación en Biotecnología, Calle 15, Avenida 14, 159-7050 Cartago, Costa Rica
| | - Kattia Núñez-Montero
- Instituto Tecnológico de Costa Rica, Escuela de Biología-Centro de Investigación en Biotecnología, Calle 15, Avenida 14, 159-7050 Cartago, Costa Rica
- Instituto de Ciencias Aplicadas, Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Avenida Alemania 1090, 4810101 Temuco, Chile
| | - Mariela Gutiérrez-Araya
- Instituto Tecnológico de Costa Rica, Escuela de Biología-Centro de Investigación en Biotecnología, Calle 15, Avenida 14, 159-7050 Cartago, Costa Rica
| | - William Watson-Guido
- Instituto Tecnológico de Costa Rica, Escuela de Biología-Centro de Investigación en Biotecnología, Calle 15, Avenida 14, 159-7050 Cartago, Costa Rica
| | - William Rivera-Méndez
- Instituto Tecnológico de Costa Rica, Escuela de Biología-Centro de Investigación en Biotecnología, Calle 15, Avenida 14, 159-7050 Cartago, Costa Rica
| | - Javier Pizarro-Cerdá
- Institut Pasteur, Université Paris Cité, CNRS UMR6047, Yersinia Research Unit - Institut Pasteur 28, rue du Docteur Roux - 75724 Paris Cedex 15, France
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3
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Bringhurst B, Greenwold M, Kellner K, Seal JN. Symbiosis, dysbiosis and the impact of horizontal exchange on bacterial microbiomes in higher fungus-gardening ants. Sci Rep 2024; 14:3231. [PMID: 38332146 PMCID: PMC10853281 DOI: 10.1038/s41598-024-53218-6] [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: 09/28/2023] [Accepted: 01/30/2024] [Indexed: 02/10/2024] Open
Abstract
Advances in our understanding of symbiotic stability have demonstrated that microorganisms are key to understanding the homeostasis of obligate symbioses. Fungus-gardening ants are excellent model systems for exploring how microorganisms may be involved in symbiotic homeostasis as the host and symbionts are macroscopic and can be easily experimentally manipulated. Their coevolutionary history has been well-studied; examinations of which have depicted broad clade-to-clade specificity between the ants and fungus. Few studies hitherto have addressed the roles of microbiomes in stabilizing these associations. Here, we quantified changes in microbiome structure as a result of experimentally induced horizontal exchange of symbionts. This was done by performing cross-fostering experiments forcing ants to grow novel fungi and comparing known temporally unstable (undergoing dysbiosis) and stable combinations. We found that fungus-gardening ants alter their unstable, novel garden microbiomes into configurations like those found in native gardens. Patterns of dysbiosis/symbiosis appear to be predictable in that two related species with similar specificity patterns also show similar patterns of microbial change, whereas a species with more relaxed specificity does not show such microbiome change or restructuring when growing different fungi. It appears that clade-to-clade specificity patterns are the outcomes of community-level interactions that promote stability or cause symbiotic collapse.
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Affiliation(s)
- Blake Bringhurst
- Department of Biology, University of Texas at Tyler, 3900 University Blvd, Tyler, TX, 757998, USA
- Department of Evolution, Ecology and Organismal Biology, The Ohio State University, 1315 Kinnear Rd, Columbus, OH, 43212, USA
| | - Matthew Greenwold
- Department of Biology, University of Texas at Tyler, 3900 University Blvd, Tyler, TX, 757998, USA
| | - Katrin Kellner
- Department of Biology, University of Texas at Tyler, 3900 University Blvd, Tyler, TX, 757998, USA
| | - Jon N Seal
- Department of Biology, University of Texas at Tyler, 3900 University Blvd, Tyler, TX, 757998, USA.
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Ayed A, Essid R, Mankai H, Echmar A, Fares N, Hammami M, Sewald N, Limam F, Tabbene O. Synergistic antifungal activity and potential mechanism of action of a glycolipid-like compound produced by Streptomyces blastmyceticus S108 against Candida clinical isolates. J Appl Microbiol 2023; 134:lxad246. [PMID: 37884451 DOI: 10.1093/jambio/lxad246] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 09/04/2023] [Accepted: 10/25/2023] [Indexed: 10/28/2023]
Abstract
AIM The present study aimed to investigate a novel antifungal compound produced by Streptomyces blastmyceticus S108 strain. Its effectiveness against clinical isolates of Candida species and its synergistic effect with conventional antifungal drugs were assessed, and its molecular mechanism of action was further studied against Candida albicans. METHODS AND RESULTS A newly isolated strain from Tunisian soil, S. blastmyceticus S108, showed significant antifungal activity against Candida species by well diffusion method. The butanolic extract of S108 strain supernatant exhibited the best anti-Candida activity with a minimal inhibitory concentration (MIC) value of 250 μg ml-1, determined by the microdilution method. The bio-guided purification steps of the butanolic extract were performed by chromatographic techniques. Among the fractions obtained, F13 demonstrated the highest level of activity, displaying a MIC of 31.25 μg ml-1. Gas chromatography-mass spectrometry and electrospray ionization mass spectrometry analyses of this fraction (F13) revealed the glycolipidic nature of the active molecule with a molecular weight of 685.6 m/z. This antifungal metabolite remained stable to physicochemical changes and did not show hemolytic activity even at 4MIC corresponding to 125 µg ml-1 toward human erythrocytes. Besides, the glycolipid compound was combined with 5-flucytosine and showed a high synergistic effect with a fractional inhibitory concentration index value 0.14 against C. albicans ATCC 10231. This combination resulted in a decrease of MIC values of 5-flucytosine and the glycolipid-like compound by 8- and 64-fold, respectively. The examination of gene expression in treated C. albicans cells by quantitative polymerase chain reaction (qPCR) revealed that the active compound tested alone or in combination with 5-flucytosine blocks the ergosterol biosynthesis pathway by downregulating the expression of ERG1, ERG3, ERG5, ERG11, and ERG25 genes. CONCLUSION AND IMPACT OF THE STUDY The new glycolipid-like compound, produced by Streptomyces S108 isolate, could be a promising drug for medical use against pathogenic Candida isolates.
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Affiliation(s)
- A Ayed
- Laboratory of Bioactive Substances, Center of Biotechnology of Borj Cedria, BP 901, Hammam-Lif 2050, Tunisia
| | - R Essid
- Laboratory of Bioactive Substances, Center of Biotechnology of Borj Cedria, BP 901, Hammam-Lif 2050, Tunisia
| | - H Mankai
- Laboratory of Bioactive Substances, Center of Biotechnology of Borj Cedria, BP 901, Hammam-Lif 2050, Tunisia
| | - A Echmar
- Laboratory of Bioactive Substances, Center of Biotechnology of Borj Cedria, BP 901, Hammam-Lif 2050, Tunisia
| | - N Fares
- Laboratory of Bioactive Substances, Center of Biotechnology of Borj Cedria, BP 901, Hammam-Lif 2050, Tunisia
| | - M Hammami
- Laboratory of Aromatic and Medicinal Plants, Center of Biotechnology of Borj Cedria, Hammam-Lif 2050, Tunisia
| | - N Sewald
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, 33615 Bielefeld, Germany
| | - F Limam
- Laboratory of Bioactive Substances, Center of Biotechnology of Borj Cedria, BP 901, Hammam-Lif 2050, Tunisia
| | - O Tabbene
- Laboratory of Bioactive Substances, Center of Biotechnology of Borj Cedria, BP 901, Hammam-Lif 2050, Tunisia
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Siddiqui SA, Li C, Aidoo OF, Fernando I, Haddad MA, Pereira JA, Blinov A, Golik A, Câmara JS. Unravelling the potential of insects for medicinal purposes - A comprehensive review. Heliyon 2023; 9:e15938. [PMID: 37206028 PMCID: PMC10189416 DOI: 10.1016/j.heliyon.2023.e15938] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 04/20/2023] [Accepted: 04/27/2023] [Indexed: 05/21/2023] Open
Abstract
Entomotherapy, the use of insects for medicinal purposes, has been practised for centuries in many countries around the world. More than 2100 edible insect species are eaten by humans, but little is known about the possibility of using these insects as a promising alternative to traditional pharmaceuticals for treating diseases. This review offers a fundamental understanding of the therapeutic applications of insects and how they might be used in medicine. In this review, 235 insect species from 15 orders are reported to be used as medicine. Hymenoptera contains the largest medicinal insect species, followed by Coleoptera, Orthoptera, Lepidoptera, and Blattodea. Scientists have examined and validated the potential uses of insects along with their products and by-products in treating various diseases, and records show that they are primarily used to treat digestive and skin disorders. Insects are known to be rich sources of bioactive compounds, explaining their therapeutic features such as anti-inflammatory, antimicrobial, antiviral, and so on. Challenges associated with the consumption of insects (entomophagy) and their therapeutic uses include regulation barriers and consumer acceptance. Moreover, the overexploitation of medicinal insects in their natural habitat has led to a population crisis, thus necessitating the investigation and development of their mass-rearing procedure. Lastly, this review suggests potential directions for developing insects used in medicine and offers advice for scientists interested in entomotherapy. In future, entomotherapy may become a sustainable and cost-effective solution for treating various ailments and has the potential to revolutionize modern medicine.
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Affiliation(s)
- Shahida Anusha Siddiqui
- Technical University of Munich Campus Straubing for Biotechnology and Sustainability, Essigberg 3, 94315 Straubing, Germany
- German Institute of Food Technologies (DIL e.V.), Prof.-von-Klitzing Str. 7, 49610 D-Quakenbrück, Germany
- Corresponding author. Technical University of Munich Campus Straubing for Biotechnology and Sustainability, Essigberg 3, 94315 Straubing, Germany.
| | - Chujun Li
- Guangzhou Unique Biotechnology Co., Ltd, 510663, Guangzhou, China
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, 510006, China
| | - Owusu Fordjour Aidoo
- Department of Biological, Physical and Mathematical Sciences, University of Environment and Sustainable Development, 00233, Somanya, Ghana
| | - Ito Fernando
- Department of Plant Pest and Diseases, Faculty of Agriculture, Universitas Brawijaya, Malang, 65145, East Java, Indonesia
| | - Moawiya A. Haddad
- Department of Nutrition and Food Processing, Faculty of Agricultural Technology, Al-Balqa Applied University, 19117, Al-Salt, Jordan
| | - Jorge A.M. Pereira
- CQM – Centro de Química da Madeira, Universidade da Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
| | - Andrey Blinov
- North Caucasus Federal University, Pushkina Street 1, 355009, Stavropol, Russia
| | - Andrey Golik
- North Caucasus Federal University, Pushkina Street 1, 355009, Stavropol, Russia
| | - José S. Câmara
- CQM – Centro de Química da Madeira, Universidade da Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
- Departamento de Química, Faculdade de Ciências Exatas e Engenharia, Universidade da Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
- Corresponding author. CQM – Centro de Química da Madeira, Universidade da Madeira, Campus da Penteada, 9020-105 Funchal, Portugal.
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6
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Gong X, Yu Y, Hao Y, Wang Q, Ma J, Jiang Y, Lv G, Li L, Qian C. Characterizing corn-straw-degrading actinomycetes and evaluating application efficiency in straw-returning experiments. Front Microbiol 2022; 13:1003157. [PMID: 36545193 PMCID: PMC9760696 DOI: 10.3389/fmicb.2022.1003157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 11/16/2022] [Indexed: 12/10/2022] Open
Abstract
Corn straw is an abundant lignocellulose resource and by-product of agricultural production. With the continuous increase in agricultural development, the output of corn straw is also increasing significantly. However, the inappropriate disposal of straw results in wasting of resources, and also causes a serious ecological crisis. Screening microorganisms with the capacity to degrade straw and understanding their mechanism of action is an efficient approach to solve such problems. For this purpose, our research group isolated three actinomycete strains with efficient lignocellulose degradation ability from soil in the cold region of China: Streptomyces sp. G1T, Streptomyces sp. G2T and Streptomyces sp. G3T. Their microbial properties and taxonomic status were assessed to improve our understanding of these strains. The three strains showed typical characteristics of the genus Streptomyces, and likely represent three different species. Genome functional annotation indicated that most of their genes were related to functions like carbohydrate transport and metabolism. In addition, a similar phenomenon also appeared in the COG and CAZyme analyses, with a large number of genes encoding carbohydrate-related hydrolases, such as cellulase, glycosidase and endoglucanase, which could effectively destroy the structure of lignocellulose in corn straw. This unambiguously demonstrated the potential of the three microorganisms to hydrolyze macromolecular polysaccharides at the molecular level. In addition, in the straw-returning test, the decomposing consortium composed of the three Streptomyces isolates (G123) effectively destroyed the recalcitrant bonds between the various components of straw, and significantly reduced the content of active components in corn straw. Furthermore, microbial diversity analysis indicated that the relative abundance of Proteobacteria, reportedly associated with soil antibiotic resistance and antibiotic degradation, was significantly improved with straw returning at both tested time points. The microbial diversity of each treatment was also dramatically changed by supplementing with G123. Taken together, G123 has important biological potential and should be further studied, which will provide new insights and strategies for appropriate treatment of corn straw.
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Affiliation(s)
- Xiujie Gong
- Institute of Farming and Cultivation, Heilongjiang Academy of Agricultural Sciences, Harbin, China
| | - Yang Yu
- Institute of Farming and Cultivation, Heilongjiang Academy of Agricultural Sciences, Harbin, China
| | - Yubo Hao
- Institute of Farming and Cultivation, Heilongjiang Academy of Agricultural Sciences, Harbin, China
| | - Qiuju Wang
- Heilongjiang Academy of Black Soil Conservation and Utilization, Harbin, China
| | - Juntao Ma
- Institute of Biotechnology, Heilongjiang Academy of Agricultural Sciences, Harbin, China
| | - Yubo Jiang
- Institute of Farming and Cultivation, Heilongjiang Academy of Agricultural Sciences, Harbin, China
| | - Guoyi Lv
- Institute of Farming and Cultivation, Heilongjiang Academy of Agricultural Sciences, Harbin, China
| | - Liang Li
- Institute of Farming and Cultivation, Heilongjiang Academy of Agricultural Sciences, Harbin, China
| | - Chunrong Qian
- Institute of Farming and Cultivation, Heilongjiang Academy of Agricultural Sciences, Harbin, China,*Correspondence: Chunrong Qian,
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Baranova AA, Zakalyukina YV, Ovcharenko AA, Korshun VA, Tyurin AP. Antibiotics from Insect-Associated Actinobacteria. BIOLOGY 2022; 11:1676. [PMID: 36421390 PMCID: PMC9687666 DOI: 10.3390/biology11111676] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/13/2022] [Accepted: 11/16/2022] [Indexed: 11/10/2023]
Abstract
Actinobacteria are involved into multilateral relationships between insects, their food sources, infectious agents, etc. Antibiotics and related natural products play an essential role in such systems. The literature from the January 2016-August 2022 period devoted to insect-associated actinomycetes with antagonistic and/or enzyme-inhibiting activity was selected. Recent progress in multidisciplinary studies of insect-actinobacterial interactions mediated by antibiotics is summarized and discussed.
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Affiliation(s)
- Anna A. Baranova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
- Gause Institute of New Antibiotics, Bol’shaya Pirogovskaya 11, 119021 Moscow, Russia
| | - Yuliya V. Zakalyukina
- Department of Soil Science, Lomonosov Moscow State University, Leninskie Gory 1-12, 119991 Moscow, Russia
| | - Anna A. Ovcharenko
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
- Higher Chemical College RAS, Mendeleev University of Chemical Technology of Russia, Miusskaya sq. 9, 125047 Moscow, Russia
| | - Vladimir A. Korshun
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
| | - Anton P. Tyurin
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
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8
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Awada B, Hamie M, El Hajj R, Derbaj G, Najm R, Makhoul P, Ali DH, Abou Fayad AG, El Hajj H. HAS 1: A natural product from soil-isolated Streptomyces species with potent activity against cutaneous leishmaniasis caused by Leishmania tropica. Front Pharmacol 2022; 13:1023114. [PMID: 36299890 PMCID: PMC9589300 DOI: 10.3389/fphar.2022.1023114] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 09/26/2022] [Indexed: 01/19/2023] Open
Abstract
Cutaneous Leishmaniasis (CL) is a neglected tropical disease, classified by the World Health Organization (WHO) as one of the most unrestrained diseases. The Syrian war and the significant displacement of refugees aggravated the spread of this ailment into several neighboring countries in the Eastern Mediterranean Region (EMR). In Syria, Leishmania tropica is identified as one of the most aggressive and endemic identified species, causing localized or generalized lesions, often chronic or relapsing. Pentavalent antimonial drugs are currently used as first line treatment against CL. Nonetheless, these drugs exhibit several limitations, including the repetitive painful injections, high cost, poor availability, and mainly systemic toxicity. Besides, the emergence of acquired parasitic resistance hinders their potency, stressing the need for new therapies to combat CL. Natural products (NPs) epitomize a valuable source in drug discovery. NPs are secondary metabolites (SMs) produced by plants, sponges, or a wide variety of organisms, including environmental microorganisms. The EMR is characterized by its immense biodiversity, yet it remains a relatively untapped area in drug discovery. NPs of the region were explored over the last 2 decades, but their discoveries lack biogeographical diversity and are limited to the Red Sea. Here, we isolated previously uncultured environmental soil-dwelling Streptomyces sp. HAS1, from Hasbaya region in southeast Lebanon. When fermented in one of our production media named INA, HAS1 produced a crude extract with significant potency against a clinical Leishmania tropica isolate. Using bio-guided fractionation, the bioactive compound was purified and the structure was elucidated by NMR and LC-HRMS. Our findings establish NPs as strong candidates for treating Leishmania tropica and further dwells on the importance of these natural sources to combat microbial infections.
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Affiliation(s)
- Bassel Awada
- Department of Experimental Pathology, Immunology and Microbiology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
- Center for Drug Discovery, American University of Beirut, Beirut, Lebanon
| | - Maguy Hamie
- Department of Experimental Pathology, Immunology and Microbiology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
- Center for Drug Discovery, American University of Beirut, Beirut, Lebanon
| | - Rana El Hajj
- Department of Biological Sciences, Beirut Arab University, Beirut, Lebanon
| | - Ghada Derbaj
- Department of Experimental Pathology, Immunology and Microbiology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
- Center for Drug Discovery, American University of Beirut, Beirut, Lebanon
| | - Rania Najm
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, United Arab Emirates
| | - Perla Makhoul
- Department of Experimental Pathology, Immunology and Microbiology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
- Center for Drug Discovery, American University of Beirut, Beirut, Lebanon
| | - Dima Hajj Ali
- Department of Experimental Pathology, Immunology and Microbiology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
| | - Antoine G. Abou Fayad
- Department of Experimental Pathology, Immunology and Microbiology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
- Center for Drug Discovery, American University of Beirut, Beirut, Lebanon
- *Correspondence: Antoine G. Abou Fayad, ; Hiba El Hajj,
| | - Hiba El Hajj
- Department of Experimental Pathology, Immunology and Microbiology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
- Center for Drug Discovery, American University of Beirut, Beirut, Lebanon
- *Correspondence: Antoine G. Abou Fayad, ; Hiba El Hajj,
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9
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Alam K, Mazumder A, Sikdar S, Zhao YM, Hao J, Song C, Wang Y, Sarkar R, Islam S, Zhang Y, Li A. Streptomyces: The biofactory of secondary metabolites. Front Microbiol 2022; 13:968053. [PMID: 36246257 PMCID: PMC9558229 DOI: 10.3389/fmicb.2022.968053] [Citation(s) in RCA: 67] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 08/15/2022] [Indexed: 11/13/2022] Open
Abstract
Natural products derived from microorganisms serve as a vital resource of valuable pharmaceuticals and therapeutic agents. Streptomyces is the most ubiquitous bacterial genus in the environments with prolific capability to produce diverse and valuable natural products with significant biological activities in medicine, environments, food industries, and agronomy sectors. However, many natural products remain unexplored among Streptomyces. It is exigent to develop novel antibiotics, agrochemicals, anticancer medicines, etc., due to the fast growth in resistance to antibiotics, cancer chemotherapeutics, and pesticides. This review article focused the natural products secreted by Streptomyces and their function and importance in curing diseases and agriculture. Moreover, it discussed genomic-driven drug discovery strategies and also gave a future perspective for drug development from the Streptomyces.
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Affiliation(s)
- Khorshed Alam
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Arpita Mazumder
- Department of Microbiology, University of Chittagong, Chittagong, Bangladesh
| | - Suranjana Sikdar
- Department of Microbiology, University of Chittagong, Chittagong, Bangladesh
| | - Yi-Ming Zhao
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Jinfang Hao
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Chaoyi Song
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Yanyan Wang
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Rajib Sarkar
- Industrial Microbiology Research Division, BCSIR Chattogram Laboratories, Bangladesh Council of Scientific and Industrial Research (BCSIR), Chattogram, Bangladesh
| | - Saiful Islam
- Industrial Microbiology Research Division, BCSIR Chattogram Laboratories, Bangladesh Council of Scientific and Industrial Research (BCSIR), Chattogram, Bangladesh
- Saiful Islam,
| | - Youming Zhang
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
- Chinese Academy of Sciences (CAS) Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
- Youming Zhang,
| | - Aiying Li
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
- *Correspondence: Aiying Li,
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10
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Oliveira VM, Andreote FD, Cortelo PC, Castro-Gamboa I, Costa-Lotufo LV, Polizeli MDLTM, Thiemann OH, Setubal JC. Microorganisms: the secret agents of the biosphere, and their key roles in biotechnology. BIOTA NEOTROPICA 2022. [DOI: 10.1590/1676-0611-bn-2022-1343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Abstract
Abstract We present a survey of projects that have been funded by FAPESP under the BIOTA-Microorganisms program. These projects generated a wide variety of results, including the identification of novel antibacterial-producing microorganisms, the characterization of novel microbial enzymes for industrial applications, taxonomic classification of novel microorganisms in several environments, investigation of the soil and mangrove microbial ecosystems and its influence on endangered plant species, and the sequencing of novel metagenome-assembled genomes. The results surveyed demonstrate the importance of microorganisms in environments that play important roles in human activities as well as the potential that many of these microorganisms have in contributing to biotechnological applications crucial for human survival in the 21st century.
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11
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Costa-Lotufo LV, Colepicolo P, Pupo MT, Palma MS. Bioprospecting macroalgae, marine and terrestrial invertebrates & their associated microbiota. BIOTA NEOTROPICA 2022. [DOI: 10.1590/1676-0611-bn-2022-1345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Abstract The present review aims the discussion of the impact of the bioprospection initiative developed by the projects associated to BIOprospecTA, a subprogram of the program BIOTA, supported by FAPESP. This review brings a summary of the main results produced by the projects investigating natural products (NPs) from non-plants organisms, as examples of the success of this initiative, focusing on the progresses achieved by the projects related to NPs from macroalgae, marine invertebrates, arthropods and associated microorganisms. Macroalgae are one of the most studied groups in Brazil with the isolation of many bioactive compounds including lipids, carotenoids, phycocolloids, lectins, mycosporine-like amino acids and halogenated compounds. Marine invertebrates and associated microorganisms have been more systematically studied in the last thirty years, revealing unique compounds, with potent biological activities. The venoms of Hymenopteran insects were also extensively studied, resulting in the identification of hundreds of peptides, which were used to create a chemical library that contributed for the identification of leader models for the development of antifungal, antiparasitic, and anticancer compounds. The built knowledge of Hymenopteran venoms permitted the development of an equine hyperimmune serum anti honeybee venom. Amongst the microorganisms associated with insects the bioprospecting strategy was to understand the molecular basis of intra- and interspecies interactions (Chemical Ecology), translating this knowledge to possible biotechnological applications. The results discussed here reinforce the importance of BIOprospecTA program on the development of research with highly innovative potential in Brazil.
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12
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The antimicrobial and immunomodulatory effects of Ionophores for the treatment of human infection. J Inorg Biochem 2021; 227:111661. [PMID: 34896767 DOI: 10.1016/j.jinorgbio.2021.111661] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 10/27/2021] [Accepted: 11/03/2021] [Indexed: 12/18/2022]
Abstract
Ionophores are a diverse class of synthetic and naturally occurring ion transporter compounds which demonstrate both direct and in-direct antimicrobial properties against a broad panel of bacterial, fungal, viral and parasitic pathogens. In addition, ionophores can regulate the host-immune response during communicable and non-communicable disease states. Although the clinical use of ionophores such as Amphotericin B, Bedaquiline and Ivermectin highlight the utility of ionophores in modern medicine, for many other ionophore compounds issues surrounding toxicity, bioavailability or lack of in vivo efficacy studies have hindered clinical development. The antimicrobial and immunomodulating properties of a range of compounds with characteristics of ionophores remain largely unexplored. As such, ionophores remain a latent therapeutic avenue to address both the global burden of antimicrobial resistance, and the unmet clinical need for new antimicrobial therapies. This review will provide an overview of the broad-spectrum antimicrobial and immunomodulatory properties of ionophores, and their potential uses in clinical medicine for combatting infection.
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13
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Azad SM, Jin Y, Ser HL, Goh BH, Lee LH, Thawai C, He YW. Biological insights into the piericidin family of microbial metabolites. J Appl Microbiol 2021; 132:772-784. [PMID: 34260807 DOI: 10.1111/jam.15222] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 03/20/2021] [Accepted: 07/12/2021] [Indexed: 01/12/2023]
Abstract
Extensively produced by members of the genus Streptomyces, piericidins are a large family of microbial metabolites, which consist of main skeleton of 4-pyridinol with methylated polyketide side chain. Nonetheless, these metabolites show differences in their bioactive potentials against micro-organisms, insects and tumour cells. Due to its close structural similarity with coenzyme Q, piericidins also possess an inhibitory activity against NADH dehydrogenase as well as Photosystem II. This review studied the latest research progress of piericidins, covering the chemical structure and physical properties of newly identified members, bioactivities, biosynthetic pathway with gene clusters and future prospect. With the increasing incidence of drug-resistant human pathogen strains and cancers, this review aimed to provide clues for the development of either new potential antibiotics or anti-tumour agents.
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Affiliation(s)
- Sepideh M Azad
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Yu Jin
- School of Biotechnology, East China Science and Technology University, Shanghai, China
| | - Hooi-Leng Ser
- Novel Bacteria and Drug Discovery Research Group (NBDD), Jeffrey Cheah School of Medicine and Health Science, Monash University Malaysia, Malaysia
| | - Bey-Hing Goh
- Biofunctional Molecule Exploratory Research Group (BMEX),, School of Pharmacy, Monash University Malaysia, Malaysia
| | - Learn-Han Lee
- Novel Bacteria and Drug Discovery Research Group (NBDD), Jeffrey Cheah School of Medicine and Health Science, Monash University Malaysia, Malaysia
| | - Chitti Thawai
- Department of Biology, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok, Thailand
| | - Ya-Wen He
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai, China
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14
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Abstract
Fungal pathogens, among other stressors, negatively impact the productivity and population size of honey bees, one of our most important pollinators (1, 2), in particular their brood (larvae and pupae) (3, 4). Understanding the factors that influence disease incidence and prevalence in brood may help us improve colony health and productivity. Here, we examined the capacity of a honey bee-associated bacterium, Bombella apis, to suppress the growth of fungal pathogens and ultimately protect bee brood from infection. Our results showed that strains of B. apis inhibit the growth of two insect fungal pathogens, Beauveria bassiana and Aspergillus flavus, in vitro. This phenotype was recapitulated in vivo; bee broods supplemented with B. apis were significantly less likely to be infected by A. flavus. Additionally, the presence of B. apis reduced sporulation of A. flavus in the few bees that were infected. Analyses of biosynthetic gene clusters across B. apis strains suggest antifungal candidates, including a type 1 polyketide, terpene, and aryl polyene. Secreted metabolites from B. apis alone were sufficient to suppress fungal growth, supporting the hypothesis that fungal inhibition is mediated by an antifungal metabolite. Together, these data suggest that B. apis can suppress fungal infections in bee brood via secretion of an antifungal metabolite.
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15
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Melo WGDP, de Oliveira TB, Arcuri SL, de Morais PB, Pagnocca FC. Yeasts in the nests of the leaf-cutter ant Acromyrmex balzani in a Savanna biome: exploitation of community and metabolic diversity. Antonie van Leeuwenhoek 2021; 114:751-764. [PMID: 33738647 DOI: 10.1007/s10482-021-01555-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 03/04/2021] [Indexed: 01/06/2023]
Abstract
The leaf-cutter ant Acromyrmex balzani is responsible for causing important losses in reforestation areas, crops, and pastures, and is frequently found in the Brazilian savanna (Cerrado). So far, there is no information regarding the yeast communities that occur in their nests. Here, we evaluated the diversity, composition, and structure of yeast communities in both fungus gardens (FG) and external refuse dump (RD) of this ant species (Palmas, Tocantins, northern Brazil). A total of 720 yeasts were isolated, comprising 52 species distributed in 29 genera. The RDs have significantly richer and more diverse yeast communities than the fungus gardens, regardless of the season and the level of preservation in the area. The isolates produced a wide range of carbon polymer-degrading enzymes and were able to assimilate carbon-sources present in plant materials. We observed a different proportion of enzyme-producers and carbon-assimilation found in external refuse dump and fungus gardens from preserved and disturbed areas, suggesting that this interaction may vary depending on the environmental conditions. A. balzani nests in the savanna biome are a hotspot of yeast species with ecological, clinical, and biotechnological implications.
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Affiliation(s)
- Weilan Gomes da Paixão Melo
- Centre for the Study of Social Insects, São Paulo State University (UNESP), Rio Claro, SP, 13560-900, Brazil. .,Department of Pharmaceutical Science, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14040-903, Brazil.
| | - Tássio Brito de Oliveira
- Centre for the Study of Social Insects, São Paulo State University (UNESP), Rio Claro, SP, 13560-900, Brazil.,Department of Biology, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14040-901, Brazil
| | - Silvio Lovato Arcuri
- Centre for the Study of Social Insects, São Paulo State University (UNESP), Rio Claro, SP, 13560-900, Brazil
| | - Paula Benevides de Morais
- Laboratory of Environmental Microbiology and Biotechnology, Federal University of Tocantins (UFT), Palmas, TO, 77020-220, Brazil
| | - Fernando Carlos Pagnocca
- Centre for the Study of Social Insects, São Paulo State University (UNESP), Rio Claro, SP, 13560-900, Brazil
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16
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Chan-Bacab MJ, Reyes-Estebanez MM, Camacho-Chab JC, Ortega-Morales BO. Microorganisms as a Potential Source of Molecules to Control Trypanosomatid Diseases. Molecules 2021; 26:molecules26051388. [PMID: 33806654 PMCID: PMC7962016 DOI: 10.3390/molecules26051388] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 02/25/2021] [Accepted: 03/01/2021] [Indexed: 11/17/2022] Open
Abstract
Trypanosomatids are the causative agents of leishmaniasis and trypanosomiasis, which affect about 20 million people in the world’s poorest countries, leading to 95,000 deaths per year. They are often associated with malnutrition, weak immune systems, low quality housing, and population migration. They are generally recognized as neglected tropical diseases. New drugs against these parasitic protozoa are urgently needed to counteract drug resistance, toxicity, and the high cost of commercially available drugs. Microbial bioprospecting for new molecules may play a crucial role in developing a new generation of antiparasitic drugs. This article reviews the current state of the available literature on chemically defined metabolites of microbial origin that have demonstrated antitrypanosomatid activity. In this review, bacterial and fungal metabolites are presented; they originate from a range of microorganisms, including cyanobacteria, heterotrophic bacteria, and filamentous fungi. We hope to provide a useful overview for future research to identify hits that may become the lead compounds needed to accelerate the discovery of new drugs against trypanosomatids.
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17
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Abdelrahman SM, Patin NV, Hanora A, Aboseidah A, Desoky S, Desoky SG, Stewart FJ, Lopanik NB. The natural product biosynthetic potential of Red Sea nudibranch microbiomes. PeerJ 2021; 9:e10525. [PMID: 33604161 PMCID: PMC7868072 DOI: 10.7717/peerj.10525] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 11/18/2020] [Indexed: 01/21/2023] Open
Abstract
Background Antibiotic resistance is a growing problem that can be ameliorated by the discovery of novel drug candidates. Bacterial associates are often the source of pharmaceutically active natural products isolated from marine invertebrates, and thus, important targets for drug discovery. While the microbiomes of many marine organisms have been extensively studied, microbial communities from chemically-rich nudibranchs, marine invertebrates that often possess chemical defences, are relatively unknown. Methods We applied both culture-dependent and independent approaches to better understand the biochemical potential of microbial communities associated with nudibranchs. Gram-positive microorganisms isolated from nudibranchs collected in the Red Sea were screened for antibacterial and antitumor activity. To assess their biochemical potential, the isolates were screened for the presence of natural product biosynthetic gene clusters, including polyketide synthase (PKS) and non-ribosomal peptide synthetase (NRPS) genes, using PCR. The microbiomes of the nudibranchs were investigated by high-throughput sequencing of 16S rRNA amplicons. Results In screens against five model microorganisms, 51% of extracts displayed antimicrobial activity against more than one organism, and 19% exhibited antitumor activity against Ehrlich’s ascites carcinoma. Sixty-four percent of isolates contained PKS and NRPS genes, suggesting their genomes contain gene clusters for natural product biosynthesis. Thirty-five percent were positive for more than one class of biosynthetic gene. These strains were identified as belonging to the Firmicutes and Actinobacteria phyla via 16S rRNA gene sequencing. In addition, 16S rRNA community amplicon sequencing revealed all bacterial isolates were present in the uncultured host-associated microbiome, although they were a very small percentage of the total community. Taken together, these results indicate that bacteria associated with marine nudibranchs are potentially a rich source of bioactive compounds and natural product biosynthetic genes.
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Affiliation(s)
- Samar M Abdelrahman
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA.,Faculty of Science, Suez University, Suez, Egypt
| | - Nastassia V Patin
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA.,Center for Microbial Dynamics and Infection, Georgia Institute of Technology, Atlanta, GA, USA
| | - Amro Hanora
- Faculty of Pharmacy, Suez Canal University, Ismailia, Egypt
| | | | | | | | - Frank J Stewart
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA.,Center for Microbial Dynamics and Infection, Georgia Institute of Technology, Atlanta, GA, USA.,Department of Microbiology and Immunology, Montana State University, Bozeman, MT, USA
| | - Nicole B Lopanik
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA.,School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA
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18
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Zhou LF, Wu J, Li S, Li Q, Jin LP, Yin CP, Zhang YL. Antibacterial Potential of Termite-Associated Streptomyces spp. ACS OMEGA 2021; 6:4329-4334. [PMID: 33623843 PMCID: PMC7893633 DOI: 10.1021/acsomega.0c05580] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 01/04/2021] [Indexed: 06/12/2023]
Abstract
Twenty-one strains of termite-associated actinomycetes were tested for their activities against three bacteria. The results showed that nine strains showed bacteriostatic activities against at least one tested bacterium, and the actinomycete YH01, which was isolated from the body surface of the queen of Odontotermes formosanus, had potent antibacterial activity. The YH01 was further identified as Streptomyces davaonensis. Two metabolites roseoflavin (1) and 8-methylamino-8-demethyl-d-riboflavin (2) were isolated and purified from S. davaonensis YH01. Their structures were determined by NMR, MS, and the related literature. The metabolite 1 showed strong inhibition activities against Bacillus subtilis (MIC = 1.56 μg/mL) and Staphylococcus aureus (MIC = 3.125 μg/mL), which were comparable to referenced gentamycin sulfate, with MIC values of 1.56 and 1.56 μg/mL, respectively. Furthermore, the anti-MRSA potential of compound 1 was determined against nine kinds of MRSA strains, with inhibition zones in the ranges of 12.7-19.7 mm under a concentration of 15 μg/6 mm discs and 18.3-22.7 mm under a concentration of 30 μg/6 mm discs. However, metabolite 1 had no inhibitory effect on Gram-negative bacteria. These results suggested that roseoflavin produced by YH01 holds promise for use against Gram-positive bacteria, especially to MRSA.
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Affiliation(s)
- Ling-Feng Zhou
- College
of Life Sciences, Anhui Agricultural University, Hefei 230036, People’s Republic of China
| | - Jun Wu
- College
of Life Sciences, Anhui Agricultural University, Hefei 230036, People’s Republic of China
| | - Shuai Li
- College
of Chemistry and Life Sciences, Zhejiang
Normal University, Jinhua 321004, People’s Republic
of China
| | - Qi Li
- Zhejiang
Jinhua Guangfu Hospital, Jinhua 321004, People’s Republic
of China
| | - Li-Ping Jin
- College
of Chemistry and Life Sciences, Zhejiang
Normal University, Jinhua 321004, People’s Republic
of China
| | - Cai-Ping Yin
- College
of Life Sciences, Anhui Agricultural University, Hefei 230036, People’s Republic of China
| | - Ying-Lao Zhang
- College
of Life Sciences, Anhui Agricultural University, Hefei 230036, People’s Republic of China
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19
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Khalid S, Keller NP. Chemical signals driving bacterial-fungal interactions. Environ Microbiol 2021; 23:1334-1347. [PMID: 33511714 DOI: 10.1111/1462-2920.15410] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 01/22/2021] [Accepted: 01/25/2021] [Indexed: 12/19/2022]
Abstract
Microorganisms reside in diverse environmental communities where interactions become indispensable due to close physical associations. These interactions are driven by chemical communication among different microbial kingdoms, particularly between fungi and bacteria. Knowledge about these communication signals provides useful information about the nature of microbial interactions and allows predictions of community development in diverse environments. Here, we provide an update on the role of small signalling molecules in fungal-bacterial interactions with focus on agricultural and medicinal environments. This review highlights the range of - and response to - diverse biochemicals produced by both kingdoms with view to harnessing their properties towards drug discovery applications.
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Affiliation(s)
- Saima Khalid
- Department of Microbiology, Women University Mardan, Mardan, Pakistan
| | - Nancy P Keller
- Department of Medical Microbiology and Immunology, University of Wisconsin, Madison, WI, USA.,Department of Bacteriology, University of Wisconsin, Madison, WI, USA
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20
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Wu GY, Zhu ZY, Zhang X, Wang MM, Li JX, Hu YJ, Tan HB. Chemical constituents from the Streptomyces morookaensis strain Sm4-1986. Nat Prod Res 2021; 36:3681-3688. [PMID: 33538196 DOI: 10.1080/14786419.2021.1881095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Three new compounds, including 6-methoxy-3,4,5,7-tetramethylisochromane-3,8-diol (1), 3,4,5,7-tetramethylisochromane-3,6,8-triol (2), streptimidone derivative (3), along with ten known compounds (4-13) were isolated from the Streptomyces morookaensis strain Sm4-1986. Their chemical structures were established based on the information from UV, IR, NMR (1H NMR, 13C NMR, 1H-1H COSY, HSQC, HMBC, NOESY), and mass spectroscopic. Moreover, all the isolated new compounds were evaluated for antibacterial activities (S. aureus, B. cereus, S. epidermids and methicillin-resistant S. aureus) and their cytotoxicities against MCF-7, A549, Hela tumor cell lines and Marc-145 normal cell line.
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Affiliation(s)
- Gui-Yun Wu
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China.,Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou China
| | - Zhi-Yan Zhu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou China.,College of Life Sciences, Yangtze University, Jingzhou China
| | - Xiao Zhang
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China.,Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou China
| | - Miao-Miao Wang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou China
| | - Jian-Xiong Li
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou China
| | - Ying-Jie Hu
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Hai-Bo Tan
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou China
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21
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Menegatti C, Fukuda TTH, Pupo MT. Chemical Ecology in Insect-microbe Interactions in the Neotropics. PLANTA MEDICA 2021; 87:38-48. [PMID: 32854122 DOI: 10.1055/a-1229-9435] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Small molecules frequently mediate symbiotic interactions between microorganisms and their hosts. Brazil harbors the highest diversity of insects in the world; however, just recently, efforts have been directed to deciphering the chemical signals involved in the symbioses of microorganisms and social insects. The current scenario of natural products research guided by chemical ecology is discussed in this review. Two groups of social insects have been prioritized in the studies, fungus-farming ants and stingless bees, leading to the identification of natural products involved in defensive and nutritional symbioses. Some of the compounds also present potential pharmaceutical applications as antimicrobials, and this is likely related to their ecological roles. Microbial symbioses in termites and wasps are suggested promising sources of biologically active small molecules. Aspects related to public policies for insect biodiversity preservation are also highlighted.
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Affiliation(s)
- Carla Menegatti
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Taise T H Fukuda
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Mônica T Pupo
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
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22
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Machado PDA, Gomes PS, Midlej V, Coimbra ES, de Matos Guedes HL. PF-429242, a Subtilisin Inhibitor, Is Effective in vitro Against Leishmania infantum. Front Microbiol 2021; 12:583834. [PMID: 33584607 PMCID: PMC7876069 DOI: 10.3389/fmicb.2021.583834] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 01/06/2021] [Indexed: 01/16/2023] Open
Abstract
PF-429242 is an inhibitor of subtilisin, an important protease found in Leishmania. However, studies regarding the effect of PF-429242 on Leishmania are scarce. In this work we evaluated the antileishmanial effect of PF-429242 against Leishmania infantum and the mechanism involved in the death of the parasite. PF-429242 had low toxicity against mammalian cells (peritoneal macrophages) (CC50 = 189.07 μM) and presented activity against L. infantum promastigotes (IC50 = 2.78 μM) and intracellular amastigotes (IC50 = 14.07 μM), indicating selectivity toward the parasite. Transmission electron microscopy (TEM), as well as staining of L. infantum promastigotes with MitoTracker® Red, rhodamine 123 and MitoSOX, revealed that the mitochondria was a potential target of PF-429242. In addition, PF-429242 caused an accumulation of neutral lipids in promastigotes, which was demonstrated by Nile Red staining and TEM, and induced oxidative stress (H2DCFDA staining). Furthermore the formation of autophagic vacuoles in L. infantum promastigotes was observed by MDC staining and TEM. However, the killing induced by PF-429242 in L. infantum promastigotes appeared to be unrelated to apoptosis and/or necrosis as there was no phosphatidylserine externalization, DNA fragmentation or alterations in the permeability of the parasite plasma membrane, as assessed by annexin V-FITC, TUNEL and propidium iodide staining, respectively. The morphological and ultrastructural evaluation of the promastigotes by optical microscopy, scanning electron microscopy (SEM) and TEM, revealed the presence of parasites with flagellar defects. TEM analysis of the intracellular amastigotes indicated that mitochondrial damage and autophagy could also be involved in the death of these forms after treatment with PF-429242. In addition, PF-429242 treatment stimulated NO production from infected macrophage, but only at a high concentration (100 μM), as well as an increase of TNF levels after treatment with 10 μM of PF-429242. The compound did not stimulate ROS or IL-10 production. Together, these data highlight the antileishmanial potential of PF-429242, inducing several cellular alterations in the parasite, such as mitochondrial damage, neutral lipids accumulation, oxidative stress and autophagy which culminate in the death of L. infantum, as well as modulating host cellular responses that favor the development of an immune response against the parasite.
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Affiliation(s)
- Patrícia de Almeida Machado
- Laboratório Interdisciplinar de Pesquisas Médicas, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (Fiocruz), Rio de Janeiro, Brazil.,Laboratório de Imunofarmacologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.,Núcleo de Pesquisa em Parasitologia (NUPEP), Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Juiz de Fora, Brazil
| | - Pollyanna Stephanie Gomes
- Laboratório Interdisciplinar de Pesquisas Médicas, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (Fiocruz), Rio de Janeiro, Brazil.,Laboratório de Imunofarmacologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Victor Midlej
- Laboratório de Ultraestrutura Celular, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (Fiocruz), Rio de Janeiro, Brazil
| | - Elaine Soares Coimbra
- Núcleo de Pesquisa em Parasitologia (NUPEP), Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Juiz de Fora, Brazil
| | - Herbert Leonel de Matos Guedes
- Laboratório Interdisciplinar de Pesquisas Médicas, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (Fiocruz), Rio de Janeiro, Brazil.,Laboratório de Imunofarmacologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.,UFRJ Campus Duque de Caxias Professor Geraldo Cidade - Universidade Federal do Rio de Janeiro, Duque de Caxias, Brazil.,Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
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23
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Yun T, Zhang M, Zhou D, Jing T, Zang X, Qi D, Chen Y, Li K, Zhao Y, Tang W, Huang J, Wang W, Xie J. Anti-Foc RT4 Activity of a Newly Isolated Streptomyces sp. 5-10 From a Medicinal Plant ( Curculigo capitulata). Front Microbiol 2021; 11:610698. [PMID: 33552022 PMCID: PMC7862724 DOI: 10.3389/fmicb.2020.610698] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Accepted: 12/21/2020] [Indexed: 01/25/2023] Open
Abstract
Fusarium wilt of banana caused by Fusarium oxysporum f. sp. cubense (Foc) is a disastrous soil-borne fungal disease. Foc tropical race 4 (Foc TR4) can infect almost all banana cultivars. Until now, there is a shortage of safety and effective control methods and commercial banana cultivars with a resistance against Foc TR4. Biocontrol using environmentally friendly microbes is a promising strategy for the management of Foc TR4. Here, a strain 5-10, newly isolated from a medicinal plant (Curculigo capitulata), exhibited a high antifungal activity against Foc TR4. Combing the morphological characteristics and molecular identification, strain 5-10 was classified as a Streptomyces genus. The sequenced genome revealed that more than 39 gene clusters were involved in the biosynthesis of secondary metabolites. Some multidrug resistance gene clusters were also identified such as mdtD, vatB, and vgaE. To improve the anti-Foc TR4 activity of the strain 5-10 extracts, an optimization method of fermentation broth was established. Antifungal activity increased by 72.13% under the fermentation system containing 2.86 g/L of NaCl and 11.57% of inoculation amount. After being treated with the strain 5-10 extracts, the Foc TR4 hyphae shrinked, deformed, and ruptured. The membrane integrity and cell ultrastructure incurred irreversible damage. Streptomyces sp. 5-10 extracts play a fungicidal role in Foc TR4. Hence, Streptomyces sp. 5-10 will be a potential biocontrol agent to manage fungal diseases by exploring the microbial fertilizer.
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Affiliation(s)
- Tianyan Yun
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, China
- Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Miaoyi Zhang
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, China
| | - Dengbo Zhou
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, China
| | - Tao Jing
- Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Xiaoping Zang
- Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Dengfeng Qi
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, China
| | - Yufeng Chen
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, China
| | - Kai Li
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, China
| | - Yankun Zhao
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, China
| | - Wen Tang
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, China
| | - Jiaquan Huang
- College of Tropical Crops, Hainan University, Haikou, China
| | - Wei Wang
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, China
| | - Jianghui Xie
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, China
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24
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Antileishmanial macrolides from ant-associated Streptomyces sp. ISID311. Bioorg Med Chem 2021; 32:116016. [PMID: 33493972 DOI: 10.1016/j.bmc.2021.116016] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 01/04/2021] [Accepted: 01/07/2021] [Indexed: 02/08/2023]
Abstract
Three antifungal macrolides cyphomycin (1), caniferolide C (2) and GT-35 (3) were isolated from Streptomyces sp. ISID311, a bacterial symbiont associated with Cyphomyrmex fungus-growing ants. The planar structures of these compounds were established by 1 and 2D NMR data and MS analysis. The relative configurations of 1-3 were established using Kishi's universal NMR database method, NOE/ROE analysis and coupling constants analysis assisted by comparisons with NMR data of related compounds. Detailed bioinformatic analysis of cyphomycin biosynthetic gene cluster confirmed the stereochemical assignments. Compounds 1-3 displayed high antagonism against different strains of Escovopsis sp., pathogen fungi specialized to the fungus-growing ant system. Compounds 1-3 also exhibited potent antiprotozoal activity against intracellular amastigotes of the human parasite Leishmania donovani with IC50 values of 2.32, 0.091 and 0.073 µM, respectively, with high selectivity indexes.
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25
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Pessotti RDC, Hansen BL, Reaso JN, Ceja-Navarro JA, El-Hifnawi L, Brodie EL, Traxler MF. Multiple lineages of Streptomyces produce antimicrobials within passalid beetle galleries across eastern North America. eLife 2021; 10:65091. [PMID: 33942718 PMCID: PMC8096431 DOI: 10.7554/elife.65091] [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: 11/22/2020] [Accepted: 03/25/2021] [Indexed: 02/06/2023] Open
Abstract
Some insects form symbioses in which actinomycetes provide defense against pathogens by making antimicrobials. The range of chemical strategies employed across these associations, and how these strategies relate to insect lifestyle, remains underexplored. We assessed subsocial passalid beetles of the species Odontotaenius disjunctus, and their frass (fecal material), which is an important food resource within their galleries, as a model insect/actinomycete system. Through chemical and phylogenetic analyses, we found that O. disjunctus frass collected across eastern North America harbored multiple lineages of Streptomyces and diverse antimicrobials. Metabolites detected in frass displayed synergistic and antagonistic inhibition of a fungal entomopathogen, Metarhizium anisopliae, and multiple streptomycete isolates inhibited this pathogen when co-cultivated directly in frass. These findings support a model in which the lifestyle of O. disjunctus accommodates multiple Streptomyces lineages in their frass, resulting in a rich repertoire of antimicrobials that likely insulates their galleries against pathogenic invasion.
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Affiliation(s)
- Rita de Cassia Pessotti
- Department of Plant and Microbial Biology, University of California, BerkeleyBerkeleyUnited States
| | - Bridget L Hansen
- Department of Plant and Microbial Biology, University of California, BerkeleyBerkeleyUnited States
| | - Jewel N Reaso
- Department of Plant and Microbial Biology, University of California, BerkeleyBerkeleyUnited States
| | - Javier A Ceja-Navarro
- Bioengineering and Biomedical Sciences Department, Biological Systems and Engineering Division, Lawrence Berkeley National LaboratoryBerkeleyUnited States,Institute for Biodiversity Science and Sustainability, California Academy of SciencesBerkeleyUnited States
| | - Laila El-Hifnawi
- Department of Molecular and Cellular Biology, University of California, BerkeleyBerkeleyUnited States
| | - Eoin L Brodie
- Ecology Department, Earth and Environmental Sciences, Lawrence Berkeley National LaboratoryBerkeleyUnited States,Department of Environmental Science, Policy and Management, University of California, BerkeleyBerkeleyUnited States
| | - Matthew F Traxler
- Department of Plant and Microbial Biology, University of California, BerkeleyBerkeleyUnited States
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An JS, Hong SH, Somers E, Lee J, Kim BY, Woo D, Kim SW, Hong HJ, Jo SI, Shin J, Oh KB, Oh DC. Lenzimycins A and B, Metabolites With Antibacterial Properties From Brevibacillus sp. Associated With the Dung Beetle Onthophagus lenzii. Front Microbiol 2020; 11:599911. [PMID: 33193283 PMCID: PMC7661691 DOI: 10.3389/fmicb.2020.599911] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 10/07/2020] [Indexed: 01/29/2023] Open
Abstract
Symbiotic microorganisms associated with insects can produce a wide array of metabolic products, which provide an opportunity for the discovery of useful natural products. Selective isolation of bacterial strains associated with the dung beetle, Onthophagus lenzii, identified two strains, of which the antibiotic-producing Brevibacillus sp. PTH23 inhibited the growth of Bacillus sp. CCARM 9248, which is most closely related to the well-known entomopathogen, Bacillus thuringiensis. A comprehensive chemical investigation based on antibiotic activity discovered two new antibiotics, named lenzimycins A and B (1-2), which inhibited growth of Bacillus sp. CCARM 9248. The 1H and 13C NMR, MS, MS/MS, and IR analyses elucidated the structures of 1 and 2, which comprised a novel combination of fatty acid (12-methyltetradecanoic acid), glycerol, sulfate, and N-methyl ethanolamine. Furthermore, the acid hydrolysis of 1 revealed the absolute configuration of 12-methyltetradecanoic acid as 12S by comparing its optical rotation value with authentic (R)- and (S)-12-methyltetradecanoic acid. In addition to inhibition of Bacillus sp. CCARM 9248, lenzimycins A and B were found to inhibit the growth of some human pathogenic bacteria, including Enterococcus faecium and certain strains of Enterococcus faecalis. Furthermore, the present study elucidated that lenzimycins A and B activated a reporter system designed to detect the bacterial cell envelope stress, thereby indicating an activity against the integrity of the bacterial cell wall.
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Affiliation(s)
- Joon Soo An
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul, South Korea
| | - Seong-Heon Hong
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul, South Korea
| | - Elisabeth Somers
- Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, United Kingdom
| | - Jayho Lee
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | | | - Donghee Woo
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul, South Korea
| | - Suk Won Kim
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul, South Korea
| | - Hee-Jeon Hong
- Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, United Kingdom
| | - Shin-Il Jo
- Animal Welfare Division, Seoul Zoo, Seoul Grand Park, Seoul, South Korea
| | - Jongheon Shin
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul, South Korea
| | - Ki-Bong Oh
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Dong-Chan Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul, South Korea
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27
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Protection of surplus food from fungal spoilage using Streptomyces spp.: a green approach. Arch Microbiol 2020; 203:941-950. [PMID: 33089339 DOI: 10.1007/s00203-020-02087-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 09/23/2020] [Accepted: 10/06/2020] [Indexed: 02/04/2023]
Abstract
Consortia of Streptomyces spp. (colonies 169, 194, 165 and 130) used in this study are an efficient producer of secondary metabolites like chitinases and antifungal compounds, which may help in the protection of surplus food from spoilage. Qualitative screening for chitinase production and taxonomy of these colonies were undertaken in our previous studies. In the current study, GC-MS analysis of extract produced from the consortia of Streptomyces strains was done for the identification of antifungal compounds. Treatment of surplus food with activated consortia of Streptomyces spp. has protected powdered food for a month, whereas fresh food (unpowdered) was preserved for two days. A control sample of surplus food (untreated) was kept to check the contamination, which resulted in the growth of three fungi (FP-1, FG-1, and FB-1). Taxonomic characterization of fungi and identification of toxic compounds produced from them were done by ITS amplification and GC-MS analysis, respectively. The study shows that the secondary metabolites from Streptomyces spp. have the potential to protect the food from mycotoxin contamination. Based on literature reports, this is for the first time that bioactive compounds and chitinases produced from Streptomyces are being used for the protection and management of surplus food.
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28
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Batey SFD, Greco C, Hutchings MI, Wilkinson B. Chemical warfare between fungus-growing ants and their pathogens. Curr Opin Chem Biol 2020; 59:172-181. [PMID: 32949983 PMCID: PMC7763482 DOI: 10.1016/j.cbpa.2020.08.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/28/2020] [Accepted: 08/03/2020] [Indexed: 12/19/2022]
Abstract
Fungus-growing attine ants are under constant threat from fungal pathogens such as the specialized mycoparasite Escovopsis, which uses combined physical and chemical attack strategies to prey on the fungal gardens of the ants. In defence, some species assemble protective microbiomes on their exoskeletons that contain antimicrobial-producing Actinobacteria. Underlying this network of mutualistic and antagonistic interactions are an array of chemical signals. Escovopsis weberi produces the shearinine terpene-indole alkaloids, which affect ant behaviour, diketopiperazines to combat defensive bacteria, and other small molecules that inhibit the fungal cultivar. Pseudonocardia and Streptomyces mutualist bacteria produce depsipeptide and polyene macrolide antifungals active against Escovopsis spp. The ant nest metabolome is further complicated by competition between defensive bacteria, which produce antibacterials active against even closely related species. Specialist fungal pathogens attack the nests of fungus-growing ants. Ants form mutualistic relationships with defensive actinomycete bacteria. Specialised metabolites underpin these mutualistic and antagonistic interactions.
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Affiliation(s)
- Sibyl F D Batey
- Department of Molecular Microbiology, John Innes Centre, Norwich, NR4 7UH, United Kingdom
| | - Claudio Greco
- Department of Molecular Microbiology, John Innes Centre, Norwich, NR4 7UH, United Kingdom
| | - Matthew I Hutchings
- Department of Molecular Microbiology, John Innes Centre, Norwich, NR4 7UH, United Kingdom; School of Biological Sciences, University of East Anglia, Norwich, NR4 7TU, United Kingdom.
| | - Barrie Wilkinson
- Department of Molecular Microbiology, John Innes Centre, Norwich, NR4 7UH, United Kingdom.
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29
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Zhang K, Gu L, Zhang Y, Liu Z, Li X. Dinactin from a new producer, Streptomyces badius gz-8, and its antifungal activity against the rubber anthracnose fungus Colletotrichum gloeosporioides. Microbiol Res 2020; 240:126548. [PMID: 32653809 DOI: 10.1016/j.micres.2020.126548] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/24/2020] [Accepted: 07/03/2020] [Indexed: 10/23/2022]
Abstract
Colletotrichum gloeosporioides is a main cause of rubber anthracnose, which results in very large losses for the natural rubber industry. In this study, an actinomycete strain gz-8 was isolated and had strong antagonistic activity against C. gloeosporioides, with an inhibition rate of 72.5 %. Strain gz-8 was identified as Streptomyces badius. Three active compounds were separated from S. badius gz-8 and identified as feigrisolide B, feigrisolide C and dinactin according to the mass spectrometry and NMR-spectra results. In the three compounds, dinactin exhibited the best antifungal activity against C. gloeosporioides, with an EC50 value of 2.55 μg/mL, and its minimum inhibitory concentration was 44 μg/mL. Dinactin had broad inhibitory activities against nine other pathogenic fungi, and it also had an obvious control effect on rubber anthracnose comparable to that of chlorothalonil. Dinactin could inhibit the conidiogenesis and spore germination of C. gloeosporioides. This report will contribute to understanding the antifungal activity of dinactin against C. gloeosporioides.
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Affiliation(s)
- Kai Zhang
- School of Life and Pharmaceutical Sciences, Hainan University, Haikou, China
| | - Liushuang Gu
- School of Life and Pharmaceutical Sciences, Hainan University, Haikou, China
| | - Yuefeng Zhang
- School of Life and Pharmaceutical Sciences, Hainan University, Haikou, China
| | - Zhiqiang Liu
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, Haikou, China; School of Life and Pharmaceutical Sciences, Hainan University, Haikou, China.
| | - Xiaoyu Li
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, Haikou, China; School of Life and Pharmaceutical Sciences, Hainan University, Haikou, China.
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30
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Menegatti C, Lourenzon VB, Rodríguez-Hernández D, da Paixão Melo WG, Ferreira LLG, Andricopulo AD, do Nascimento FS, Pupo MT. Meliponamycins: Antimicrobials from Stingless Bee-Associated Streptomyces sp. JOURNAL OF NATURAL PRODUCTS 2020; 83:610-616. [PMID: 32073851 DOI: 10.1021/acs.jnatprod.9b01011] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Social insects establish complex interactions with microorganisms, some of which play defensive roles in colony protection. The important role of pollinators such as the stingless bee Melipona scutellaris in nature encouraged us to pursue efforts to study its associated microbiota. Here we describe the discovery of two novel cyclic hexadepsipeptides, meliponamycin A (1) and meliponamycin B (2), from Streptomyces sp. ICBG1318 isolated from M. scutellaris nurse bees. Their structures were established by interpretation of NMR and MS data, and the absolute configuration of the constituent amino acids was determined by the advanced Marfey's method. Compounds 1 and 2 showed strong activity against the entomopathogen Paenibacillus larvae and human pathogens Staphylococcus aureus and Leishmania infantum.
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Affiliation(s)
- Carla Menegatti
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café, s/n, 14040-903, Ribeirão Preto, SP, Brazil
| | - Vitor Bruno Lourenzon
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café, s/n, 14040-903, Ribeirão Preto, SP, Brazil
| | - Diego Rodríguez-Hernández
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café, s/n, 14040-903, Ribeirão Preto, SP, Brazil
| | - Weilan Gomes da Paixão Melo
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café, s/n, 14040-903, Ribeirão Preto, SP, Brazil
| | - Leonardo Luiz Gomes Ferreira
- Instituto de Física de São Carlos, Universidade de São Paulo, Avenida João Dagnone, 1100, 13563-120, São Carlos, SP, Brazil
| | - Adriano Defini Andricopulo
- Instituto de Física de São Carlos, Universidade de São Paulo, Avenida João Dagnone, 1100, 13563-120, São Carlos, SP, Brazil
| | - Fabio Santos do Nascimento
- Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Avenida Bandeirantes, 3900, 14040-901, Ribeirão Preto, SP, Brazil
| | - Mônica Tallarico Pupo
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café, s/n, 14040-903, Ribeirão Preto, SP, Brazil
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