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Mascuch SJ, Demko A, Viulu S, Ginigini J, Soapi K, Jensen P, Kubanek J. Antibiotic Activity Altered by Competitive Interactions Between Two Coral Reef-Associated Bacteria. MICROBIAL ECOLOGY 2023; 85:1226-1235. [PMID: 35460372 PMCID: PMC9588090 DOI: 10.1007/s00248-022-02016-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 04/16/2022] [Indexed: 05/10/2023]
Abstract
Microbes produce natural products that mediate interactions with each other and with their environments, representing a potential source of antibiotics for human use. The biosynthesis of some antibiotics whose constitutive production otherwise remains low has been shown to be induced by competing microbes. Competition among macroorganism hosts may further influence the metabolic outputs of members of their microbiomes, especially near host surfaces where hosts and microbial symbionts come into close contact. At multiple field sites in Fiji, we collected matched samples of corals and algae that were freestanding or in physical contact with each other, cultivated bacteria from their surfaces, and explored growth-inhibitory activities of these bacteria against marine and human pathogens. In the course of the investigation, an interaction was discovered between two coral-associated actinomycetes in which an Agrococcus sp. interfered with the antibiotic output of a Streptomyces sp. Several diketopiperazines identified from the antibiotic-producing bacterium could not, on their own, account for the antibiotic activity indicating that other, as yet unidentified molecule(s) or molecular blends, possibly including diketopiperazines, are likely involved. This observation highlights the complex molecular dynamics at play among microbiome constituents. The mechanisms through which microbial interactions impact the biological activities of specialized metabolites deserve further attention considering the ecological and commercial importance of bacterial natural products.
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Affiliation(s)
- Samantha J Mascuch
- Institute for Bioengineering and Bioscience, Center for Microbial Dynamics and Infection, School of Biological Sciences and School of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, GA, USA
| | - Alyssa Demko
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, UC San Diego, La Jolla, CA, USA
| | - Samson Viulu
- School of Biological and Chemical Sciences, The University of the South Pacific, Suva, Fiji
| | - Joape Ginigini
- School of Biological and Chemical Sciences, The University of the South Pacific, Suva, Fiji
| | - Katy Soapi
- School of Biological and Chemical Sciences, The University of the South Pacific, Suva, Fiji
| | - Paul Jensen
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, UC San Diego, La Jolla, CA, USA
| | - Julia Kubanek
- Institute for Bioengineering and Bioscience, Center for Microbial Dynamics and Infection, School of Biological Sciences and School of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, GA, USA.
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Ren Z, Xie L, Okyere SK, Wen J, Ran Y, Nong X, Hu Y. Antibacterial Activity of Two Metabolites Isolated From Endophytic Bacteria Bacillus velezensis Ea73 in Ageratina adenophora. Front Microbiol 2022; 13:860009. [PMID: 35602058 PMCID: PMC9121010 DOI: 10.3389/fmicb.2022.860009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 04/06/2022] [Indexed: 12/02/2022] Open
Abstract
Ageratina adenophora, as an invasive and poisonous weed, seriously affects the ecological diversity and development of animal husbandry. Weed management practitioners have reported that it is very difficult to control A. adenophora invasion. In recent years, many researchers have focused on harnessing the endophytes of the plant as a useful resource for the development of pharmacological products for human and animal use. This study was performed to identify endophytes with antibacterial properties from A. adenophora. Agar well diffusion method and 16S rRNA gene sequencing technique were used to screen and identify endophytes with antibacterial activity. The response surface methodology and prep- high-performance liquid chromatography were used to determine the optimizing fermentation conditions and isolate secondary metabolites, respectively. UV-visible spectroscopy, infrared spectroscopy, nuclear magnetic resonance, and high-resolution mass spectrum were used to determine the structures of the isolated metabolites. From the experiment, we isolated a strain of Bacillus velezensis Ea73 (GenBank no. MZ540895) with broad-spectrum antibacterial activity. We also observed that the zone of inhibition of B. velezensis Ea73 against Staphylococcus aureus was the largest when fermentation broth contained 6.55 g/L yeast extract, 6.61 g/L peptone, 20.00 g/L NaCl at broth conditions of 7.95 pH, 51.04 h harvest time, and a temperature of 27.97°C. Two antibacterial peptides, Cyclo (L-Pro-L-Val) and Cyclo (L-Leu-L-Pro), were successfully extracted from B. velezensis Ea73. These two peptides exhibited mild inhibition against S. aureus and Escherichia coli. Therefore, we isolated B. velezensis Ea73 with antibacterial activity from A. adenophora. Hence, its metabolites, Cyclo (L-Pro-L-Val) and Cyclo (L-Leu-L-Pro), could further be developed as a substitute for human and animal antibiotics.
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Affiliation(s)
- Zhihua Ren
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Yaan, China
| | - Lei Xie
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Yaan, China
| | - Samuel Kumi Okyere
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Yaan, China
| | - Juan Wen
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Yaan, China
| | - Yinan Ran
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Yaan, China
| | - Xiang Nong
- College of Life Science, Leshan Normal University, Leshan, China
| | - Yanchun Hu
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Yaan, China
- *Correspondence: Yanchun Hu
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Zhao K, Xing R, Yan X. Cyclic dipeptides: Biological activities and self‐assembled materials. Pept Sci (Hoboken) 2020. [DOI: 10.1002/pep2.24202] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Kaili Zhao
- State Key Laboratory of Biochemical Engineering Institute of Process Engineering, Chinese Academy of Sciences Beijing China
- School of Chemical Engineering University of Chinese Academy of Sciences Beijing China
| | - Ruirui Xing
- State Key Laboratory of Biochemical Engineering Institute of Process Engineering, Chinese Academy of Sciences Beijing China
- School of Chemical Engineering University of Chinese Academy of Sciences Beijing China
| | - Xuehai Yan
- State Key Laboratory of Biochemical Engineering Institute of Process Engineering, Chinese Academy of Sciences Beijing China
- School of Chemical Engineering University of Chinese Academy of Sciences Beijing China
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Carrieri R, Borriello G, Piccirillo G, Lahoz E, Sorrentino R, Cermola M, Censi SB, Grauso L, Mangoni A, Vinale F. Antibiotic Activity of a Paraphaeosphaeria sporulosa-Produced Diketopiperazine against Salmonella enterica. J Fungi (Basel) 2020; 6:jof6020083. [PMID: 32531985 PMCID: PMC7344678 DOI: 10.3390/jof6020083] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 06/06/2020] [Accepted: 06/07/2020] [Indexed: 11/16/2022] Open
Abstract
A diketopiperazine has been purified from a culture filtrate of the endophytic fungus Paraphaeosphaeria sporulosa, isolated from healthy tissues of strawberry plants in a survey of microbes as sources of anti-bacterial metabolites. Its structure has been determined by nuclear magnetic resonance (NMR) and liquid chromatography-mass spectrometry (LC-MS) analyses and was found to be identical to cyclo(L-Pro-L-Phe) purified from species of other fungal genera. This secondary metabolite has been selected following bioguided-assay fractionation against two strains of Salmonella enterica, the causal agent of bovine gastroenteritis. The diketopiperazine cyclo(L-Pro-L-Phe), isolated for the first time from Paraphaeosphaeria species, showed minimum inhibitory concentration (MIC) values of 71.3 and 78.6 μg/mL against the two S. enterica strains. This finding may be significant in limiting the use of synthetic antibiotics in animal husbandry and reducing the emergence of bacterial multidrug resistance. Further in vivo experiments of P. sporulosa diketopiperazines are important for the future application of these metabolites.
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Affiliation(s)
- Raffaele Carrieri
- Consiglio per la ricerca in agricoltura e l’economia agraria, Cerealicoltura e Colture Industriali. Via Torrino, 2; I-81100 Caserta, Italy; (R.C.); (G.P.); (E.L.); (R.S.); (M.C.)
| | - Giorgia Borriello
- Istituto Zooprofilattico Sperimentale del Mezzogiorno, Via Salute, 2; Portici, 80055 Napoli, Italy;
| | - Giulio Piccirillo
- Consiglio per la ricerca in agricoltura e l’economia agraria, Cerealicoltura e Colture Industriali. Via Torrino, 2; I-81100 Caserta, Italy; (R.C.); (G.P.); (E.L.); (R.S.); (M.C.)
| | - Ernesto Lahoz
- Consiglio per la ricerca in agricoltura e l’economia agraria, Cerealicoltura e Colture Industriali. Via Torrino, 2; I-81100 Caserta, Italy; (R.C.); (G.P.); (E.L.); (R.S.); (M.C.)
| | - Roberto Sorrentino
- Consiglio per la ricerca in agricoltura e l’economia agraria, Cerealicoltura e Colture Industriali. Via Torrino, 2; I-81100 Caserta, Italy; (R.C.); (G.P.); (E.L.); (R.S.); (M.C.)
| | - Michele Cermola
- Consiglio per la ricerca in agricoltura e l’economia agraria, Cerealicoltura e Colture Industriali. Via Torrino, 2; I-81100 Caserta, Italy; (R.C.); (G.P.); (E.L.); (R.S.); (M.C.)
| | | | - Laura Grauso
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II. Via Università, 100; Portici, 80055 Napoli, Italy;
| | - Alfonso Mangoni
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II. Via Domenico Montesano, 49; 80131 Napoli, Italy;
| | - Francesco Vinale
- Dipartimento di Medicina Veterinaria e Produzioni Animali—Università degli Studi di Napoli Federico II. Via Federico Delpino, 1; 80137 Napoli, Italy
- Consiglio Nazionale delle Ricerche, Istituto per la Protezione Sostenibile delle Piante, Via Università, 133, Portici, 80131 Napoli, Italy
- Correspondence:
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Kalinovskaya NI, Romanenko LA, Kalinovsky AI. Antibacterial low-molecular-weight compounds produced by the marine bacterium Rheinheimera japonica KMM 9513 T. Antonie van Leeuwenhoek 2017; 110:719-726. [PMID: 28176144 DOI: 10.1007/s10482-017-0839-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 01/31/2017] [Indexed: 01/02/2023]
Abstract
Strain KMM 9513T was isolated from a sediment sample collected from the Sea of Japan seashore and selected due to its ability to inhibit indicator bacterial growth. The strain KMM 9513T has been recently described as a novel species Rheinheimera japonica. This study was undertaken to determine which substances produced by strain KMM 9513T could be responsible for its antimicrobial activity. Eight compounds were obtained from an ethyl acetate extract of R. japonica KMM 9513T. The structures of five diketopiperazines (4-8) and diisobutyl-, dibutyl- and bis(2-ethylhexyl) phthalates (1-3) were established on the basis of detailed interpretation of NMR data, by Marfey method and optical rotation data. The structures of diketopiperazines were determined as cyclo-(L-valyl-L-proline), cyclo-(L-valyl-D-proline), cyclo-(L-phenylalanyl-L-proline), cyclo-(L-leucyl-L-proline), and cyclo-(L-phenylalanyl-D-proline). Compounds 1-3, 5 and 8 revealed antimicrobial activities against Bacillus subtilis and/or Enterococcus faecium and Staphylococcus aureus. In this paper, we describe the isolation and structural elucidation of the isolated compounds 1-8. This is the first report of the characterisation of low molecular weight antibacterial metabolites produced by a member of the genus Rheinheimera.
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Affiliation(s)
- Natalia I Kalinovskaya
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Prospect 100 Let Vladivostoku, 159, Vladivostok, Russia, 690022
| | - Lyudmila A Romanenko
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Prospect 100 Let Vladivostoku, 159, Vladivostok, Russia, 690022. .,Far Eastern Federal University, Oktyabr'skaya Street, 27, Vladivostok, Russia, 690091.
| | - Anatoly I Kalinovsky
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Prospect 100 Let Vladivostoku, 159, Vladivostok, Russia, 690022
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Ahumada-Santos YP, Soto-Sotomayor ME, Báez-Flores ME, Díaz-Camacho SP, López-Angulo G, Eslava-Campos CA, Delgado-Vargas F. Antibacterial synergism of Echeveria subrigida (B. L. Rob & Seaton) and commercial antibiotics against multidrug resistant Escherichia coli and Staphylococcus aureus. Eur J Integr Med 2016. [DOI: 10.1016/j.eujim.2016.08.160] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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In vitro antibacterial screening of six proline-based cyclic dipeptides in combination with β-lactam antibiotics against medically important bacteria. Appl Biochem Biotechnol 2014; 173:116-28. [PMID: 24622848 DOI: 10.1007/s12010-014-0808-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Accepted: 02/12/2014] [Indexed: 10/25/2022]
Abstract
The in vitro synergistic antibacterial activity of six proline-based cyclic dipeptides [cyclo(D-Pro-L-Leu), cyclo(L-Pro-L-Met), cyclo(D-Pro-L-Phe), cyclo(L-Pro-L-Phe), cyclo(L-Pro-L-Tyr), and cyclo(L-Pro-D-Tyr)] in combination imipenem and ceftazidime was investigated in the present manuscript. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of the cyclic dipeptides were compared with those of the standard antibiotics (imipenem and ceftazidime). The synergistic antibacterial activities of cyclic dipeptides with imipenem or ceftazidime were assessed using the checkerboard and time-kill methods. The results of the present study showed that the combined effect of six cyclic dipeptides with imipenem predominantly recorded synergistic interaction (FIC index <0.5), whereas combination of certain cyclic dipeptides with ceftazidime recorded additive. The time-kill curve showed that the growth of the test bacteria was completely attenuated after 12-24 h of treatment with a 50:50 ratio of proline-based cyclic dipeptides and antibiotics. These synergistic effects have a potential role in delaying the development of resistance as the antibacterial activity is achieved with the very low concentrations of cyclic dipeptides and antibiotics. The cytotoxicity of cyclic dipeptides was tested against VERO cell line (African green monkey kidney cell line), and no cytotoxicity was recorded for cyclic dipeptides up to 100 μg/mL. These findings suggest that combination of cyclic dipeptides and antibiotics might be a good strategy for the individualization of novel templates for the development of new antimicrobial agents or combinations of drugs for antimicrobial chemotherapy. Moreover, these combinations may lead to the development of a new and vital antimicrobial combination against the infections caused by pathogenic bacteria. The in vitro synergistic activity of cyclic dipeptides with antibiotics against medically important bacteria is reported here for the first time.
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Combination of extracts from Aristolochia cymbifera with streptomycin as a potential antibacterial drug. SPRINGERPLUS 2013; 2:430. [PMID: 24040585 PMCID: PMC3771021 DOI: 10.1186/2193-1801-2-430] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Accepted: 08/22/2013] [Indexed: 11/19/2022]
Abstract
The appearance of new antibiotic-resistant bacteria is a societal problem that requires the development of new alternative treatments. Therefore, this work evaluated the antibacterial activity of ethanolic (EHI), dichloromethanic (EDI) and hexanic (EHE) extracts from Aristolochia cymbifera stems and the combination of these extracts with an antimicrobial drug to develop a new antibacterial therapy. The EDI, EHE and EHI extracts were obtained by maceration using three different solvents. The minimal inhibitory concentrations (MIC) of these extracts were determined using the microdilution test to determine the antibacterial potential of these extracts and their combination with streptomycin against Staphylococcus aureus, Bacillus cereus, Klebsiella pneumoniae and Shigella flexneri. The extract dose leading to the cytotoxicity of 50% of the cells (CC50) was evaluated using mammalian cells MA104 and the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) colorimetric assay. The extracts had a MIC under 500 mg/L and a CC50 lower than 50 mg/L. The antibiotic/extract proportion influenced the antibacterial activity of the mixtures, and the proportion that optimized the antibacterial activity of streptomycin was a mixture that contained 75 percent of extract. This composition included less than 6.5 mg/L of extract and 2.5 mg/L of streptomycin and has potential as a new antibacterial therapy.
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