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Mondal S, Acharya U, Mukherjee T, Bhattacharya D, Ghosh A, Ghosh A. Exploring the dynamics of ISR signaling in maize upon seed priming with plant growth promoting actinobacteria isolated from tea rhizosphere of Darjeeling. Arch Microbiol 2024; 206:282. [PMID: 38806859 DOI: 10.1007/s00203-024-04016-1] [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: 03/12/2024] [Revised: 05/17/2024] [Accepted: 05/20/2024] [Indexed: 05/30/2024]
Abstract
Plant growth-promoting rhizobacteria (PGPR) offer an eco-friendly alternative to agrochemicals for better plant growth and development. Here, we evaluated the plant growth promotion abilities of actinobacteria isolated from the tea (Camellia sinensis) rhizosphere of Darjeeling, India. 16 S rRNA gene ribotyping of 28 isolates demonstrated the presence of nine different culturable actinobacterial genera. Assessment of the in vitro PGP traits revealed that Micrococcus sp. AB420 exhibited the highest level of phosphate solubilization (i.e., 445 ± 2.1 µg/ml), whereas Kocuria sp. AB429 and Brachybacterium sp. AB440 showed the highest level of siderophore (25.8 ± 0.1%) and IAA production (101.4 ± 0.5 µg/ml), respectively. Biopriming of maize seeds with the individual actinobacterial isolate revealed statistically significant growth in the treated plants compared to controls. Among them, treatment with Paenarthrobacter sp. AB416 and Brachybacterium sp. AB439 exhibited the highest shoot and root length. Biopriming has also triggered significant enzymatic and non-enzymatic antioxidative defense reactions in maize seedlings both locally and systematically, providing a critical insight into their possible role in the reduction of reactive oxygen species (ROS) burden. To better understand the role of actinobacterial isolates in the modulation of plant defense, three selected actinobacterial isolates, AB426 (Brevibacterium sp.), AB427 (Streptomyces sp.), and AB440 (Brachybacterium sp.) were employed to evaluate the dynamics of induced systemic resistance (ISR) in maize. The expression profile of five key genes involved in SA and JA pathways revealed that bio-priming with actinobacteria (Brevibacterium sp. AB426 and Brachybacterium sp. AB440) preferably modulates the JA pathway rather than the SA pathway. The infection studies in bio-primed maize plants resulted in a delay in disease progression by the biotrophic pathogen Ustilago maydis in infected maize plants, suggesting the positive efficacy of bio-priming in aiding plants to cope with biotic stress. Conclusively, this study unravels the intrinsic mechanisms of PGPR-mediated ISR dynamics in bio-primed plants, offering a futuristic application of these microorganisms in the agricultural fields as an eco-friendly alternative.
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Affiliation(s)
- Sangita Mondal
- Department of Biological Sciences, Bose Institute, Unified Academic Campus, EN 80, Sector V, Bidhan Nagar, Kolkata, WB, 700091, India
| | - Udita Acharya
- Department of Biological Sciences, Bose Institute, Unified Academic Campus, EN 80, Sector V, Bidhan Nagar, Kolkata, WB, 700091, India
| | - Triparna Mukherjee
- Department of Biological Sciences, Bose Institute, Unified Academic Campus, EN 80, Sector V, Bidhan Nagar, Kolkata, WB, 700091, India
- Department of Biotechnology, School of Biotechnology and Bioscience, Brainware University, Kolkata, India
| | - Dhruba Bhattacharya
- Department of Biological Sciences, Bose Institute, Unified Academic Campus, EN 80, Sector V, Bidhan Nagar, Kolkata, WB, 700091, India
| | - Anupama Ghosh
- Department of Biological Sciences, Bose Institute, Unified Academic Campus, EN 80, Sector V, Bidhan Nagar, Kolkata, WB, 700091, India
| | - Abhrajyoti Ghosh
- Department of Biological Sciences, Bose Institute, Unified Academic Campus, EN 80, Sector V, Bidhan Nagar, Kolkata, WB, 700091, India.
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Thompson TP, Gilmore BF. Exploring halophilic environments as a source of new antibiotics. Crit Rev Microbiol 2024; 50:341-370. [PMID: 37079280 DOI: 10.1080/1040841x.2023.2197491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 03/25/2023] [Indexed: 04/21/2023]
Abstract
Microbial natural products from microbes in extreme environments, including haloarchaea, and halophilic bacteria, possess a huge capacity to produce novel antibiotics. Additionally, enhanced isolation techniques and improved tools for genomic mining have expanded the efficiencies in the antibiotic discovery process. This review article provides a detailed overview of known antimicrobial compounds produced by halophiles from all three domains of life. We summarize that while halophilic bacteria, in particular actinomycetes, contribute the vast majority of these compounds the importance of understudied halophiles from other domains of life requires additional consideration. Finally, we conclude by discussing upcoming technologies- enhanced isolation and metagenomic screening, as tools that will be required to overcome the barriers to antimicrobial drug discovery. This review highlights the potential of these microbes from extreme environments, and their importance to the wider scientific community, with the hope of provoking discussion and collaborations within halophile biodiscovery. Importantly, we emphasize the importance of bioprospecting from communities of lesser-studied halophilic and halotolerant microorganisms as sources of novel therapeutically relevant chemical diversity to combat the high rediscovery rates. The complexity of halophiles will necessitate a multitude of scientific disciplines to unravel their potential and therefore this review reflects these research communities.
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Affiliation(s)
- Thomas P Thompson
- Biofilm Research Group, School of Pharmacy, Queen's University Belfast, Belfast, UK
| | - Brendan F Gilmore
- Biofilm Research Group, School of Pharmacy, Queen's University Belfast, Belfast, UK
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Rammali S, Rahim A, El Aalaoui M, Bencharki B, Dari K, Habach A, Abdeslam L, Khattabi A. Antimicrobial potential of Streptomyces coeruleofuscus SCJ isolated from microbiologically unexplored garden soil in Northwest Morocco. Sci Rep 2024; 14:3359. [PMID: 38336871 PMCID: PMC10858231 DOI: 10.1038/s41598-024-53801-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 02/05/2024] [Indexed: 02/12/2024] Open
Abstract
Research on microorganisms in various biotopes is required to identify new, natural potent molecules. These molecules are essential to control the development of multi-drug resistance (MDR). In the present study, a Streptomyces sp., namely SCJ, was isolated from a soil sample collected from a Moroccan garden. SCJ isolate was identified on the basis of a polyphasic approach, which included cultural, micro-morphological, biochemical, and physiological characteristics. The sequence of the 16S rRNA gene of the SCJ strain showed 99.78% similarity to strains of Streptomyces coeruleofuscus YR-T (KY753282.1). The preliminary screening indicated that the SCJ isolate exhibited activity against Candida albicans ATCC 60,193, Escherichia coli ATCC 25,922, Staphylococcus aureus CECT 976, Staphylococcus aureus ATCC 25,923, Bacillus cereus ATCC 14,579, Pseudomonas aeruginosa ATCC 27,853, as well as various other clinical MDR bacteria and five phytopathogenic fungi. The ethyl acetate extract of the isolated strain demonstrated highly significant (p < 0.05) antimicrobial activity against multi-resistant bacteria and phytopathogenic fungi. The absorption spectral analysis of the ethyl acetate extract of the SCJ isolate obtained showed no absorption peaks characteristic of polyene molecules. Moreover, no hemolytic activity against erythrocytes was observed in this extract. GC-MS analysis of the ethyl acetate extract of the SCJ isolate revealed the presence of 9 volatile compounds including 3,5-Dimethylpyrazole, and pyrrolizidine derivatives (Pyrrolo[1,2-a]pyrazine 1,4-dione, hexahydro-3-(2-methylpropyl)), which could potentially explain the antimicrobial activity demonstrated in this study.
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Affiliation(s)
- Said Rammali
- Laboratory of Agro-Alimentary and Health, Faculty of Sciences and Techniques, Hassan First University of Settat, B.P. 539, 26000, Settat, Morocco.
| | - Abdellatif Rahim
- Laboratory of Biochemistry, Neurosciences, Natural Ressources and Environment, Faculty of Sciences and Techniques, Hassan First University of Settat, B.P. 539, 26000, Settat, Morocco
| | - Mohamed El Aalaoui
- Regional Center of Agronomic Research of Settat, Tertiary Road 1406, At 5 Km From Settat, 26400, Settat, Morocco
| | - Bouchaib Bencharki
- Laboratory of Agro-Alimentary and Health, Faculty of Sciences and Techniques, Hassan First University of Settat, B.P. 539, 26000, Settat, Morocco
| | - Khadija Dari
- Laboratory of Agro-Alimentary and Health, Faculty of Sciences and Techniques, Hassan First University of Settat, B.P. 539, 26000, Settat, Morocco
| | - Aicha Habach
- Biotechnology Unit, National Institute of Agronomic Research of Rabat, Av. Annasr, 10000, Rabat, Morocco
| | - Lamiri Abdeslam
- Applied Chemistry & Environment Laboratory, Faculty of Sciences and Techniques, Hassan First University of Settat, B.P. 539, 26000, Settat, Morocco
| | - Abdelkrim Khattabi
- Laboratory of Agro-Alimentary and Health, Faculty of Sciences and Techniques, Hassan First University of Settat, B.P. 539, 26000, Settat, Morocco
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Rathinam AJ, Santhaseelan H, Dahms HU, Dinakaran VT, Murugaiah SG. Bioprospecting of unexplored halophilic actinobacteria against human infectious pathogens. 3 Biotech 2023; 13:398. [PMID: 37974926 PMCID: PMC10645811 DOI: 10.1007/s13205-023-03812-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 10/08/2023] [Indexed: 11/19/2023] Open
Abstract
Human pathogenic diseases received much attention recently due to their uncontrolled spread of antimicrobial resistance (AMR) which causes several threads every year. Effective alternate antimicrobials are urgently required to combat those disease causing infectious microbes. Halophilic actinobacteria revealed huge potentials and unexplored cultivable/non-cultivable actinobacterial species producing enormous antimicrobials have been proved in several genomics approaches. Potential gene clusters, PKS and NRPKS from Nocardia, Salinospora, Rhodococcus, and Streptomyces have wide range coding genes of secondary metabolites. Biosynthetic pathways identification via various approaches like genome mining, In silico, OSMAC (one strain many compound) analysis provides better identification of knowing the active metabolites using several databases like AMP, APD and CRAMPR, etc. Genome constellations of actinobacteria particularly the prediction of BGCs (Biosynthetic Gene Clusters) to mine the bioactive molecules such as pigments, biosurfactants and few enzymes have been reported for antimicrobial activity. Saltpan, saltlake, lagoon and haloalkali environment exploring potential actinobacterial strains Micromonospora, Kocuria, Pseudonocardia, and Nocardiopsis revealed several acids and ester derivatives with antimicrobial potential. Marine sediments and marine macro organisms have been found as significant population holders of potential actinobacterial strains. Deadly infectious diseases (IDs) including tuberculosis, ventilator-associated pneumonia and Candidiasis, have been targeted by halo-actinobacterial metabolites with promising results. Methicillin resistant Staphylococus aureus and virus like Encephalitic alphaviruses were potentially targeted by halophilic actinobacterial metabolites by the compound Homoseongomycin from sponge associated antinobacterium. In this review, we discuss the potential antimicrobial properties of various biomolecules extracted from the unexplored halophilic actinobacterial strains specifically against human infectious pathogens along with prospective genomic constellations.
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Affiliation(s)
- Arthur James Rathinam
- Department of Marine Science, Bharathidasan University, Tiruchirappalli, 620 024 India
| | - Henciya Santhaseelan
- Department of Marine Science, Bharathidasan University, Tiruchirappalli, 620 024 India
| | - Hans-Uwe Dahms
- Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung, 80708 Taiwan
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Manikkam R, Murthy S, Palaniappan S, Kaari M, Sahu AK, Said M, Ganesan V, Kannan S, Ramasamy B, Thirugnanasambandan S, Dastager SG, Hanna LE, Kumar V. Antibacterial and Anti-HIV Metabolites from Marine Streptomyces albus MAB56 Isolated from Andaman and Nicobar Islands, India. Appl Biochem Biotechnol 2023; 195:7738-7754. [PMID: 37086378 DOI: 10.1007/s12010-023-04493-y] [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] [Accepted: 04/11/2023] [Indexed: 04/23/2023]
Abstract
Marine-derived actinobacteria have tremendous potential to produce novel metabolites with diverse biological activities. The Andaman coast of India has a lot of microbial diversity, but it is still a relatively unknown ecology for isolating novel actinobacteria with beneficial bioactive compounds. We have isolated 568 actinobacterial strains from mangrove rhizosphere sediments and sponge samples. Crude extracts from 75 distinct strains were produced by agar surface fermentation and extracted using ethyl acetate. In the disc diffusion method, 25 actinobacterial strains showed antimicrobial activity; notably, the strain MAB56 demonstrated promising broad-spectrum activity. Strain MAB56 was identified as Streptomyces albus by cultural, microscopic, and molecular methods. Conditions for bioactive metabolites from MAB56 were optimized and produced in a lab-scale fermenter. Three active metabolites (C1, C2, and C3) that showed promising broad-spectrum antimicrobial activity were isolated through HPLC-based purification. Based on the UV, FT-IR, NMR, and LC-MS analysis, the chemical nature of the active compounds was confirmed as 12-methyltetradecanoic acid (C1), palmitic acid (C2), and tridecanoic acid (C3) with molecular formulae C14H28O2, C16H32O2, and C13H26O2, respectively. Interestingly, palmitic acid (C2) also exhibited anti-HIV activity with an IC50 value of < 1 µg/ml. Our findings reveal that the actinobacteria from the Andaman marine ecosystems are promising for isolating anti-infective metabolites.
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Affiliation(s)
- Radhakrishnan Manikkam
- Centre for Drug Discovery and Development, Sathyabama Institute of Science and Technology, Chennai, 600119, Tamil Nadu, India.
| | - Sangeetha Murthy
- Department of Microbiology, Periyar University, Salem, 636011, Tamil Nadu, India
| | | | - Manigundan Kaari
- Centre for Drug Discovery and Development, Sathyabama Institute of Science and Technology, Chennai, 600119, Tamil Nadu, India
| | - Amit Kumar Sahu
- Microbial Resource Centre, National Chemical Laboratory, Pune, India
| | - Madhukar Said
- Microbial Resource Centre, National Chemical Laboratory, Pune, India
| | - Vijayalakshmi Ganesan
- Centre for Drug Discovery and Development, Sathyabama Institute of Science and Technology, Chennai, 600119, Tamil Nadu, India
| | - Sivakumar Kannan
- CAS in Marine Biology, Annamalai University, Parangipettai, Tamil Nadu, India
| | | | | | - Syed G Dastager
- Microbial Resource Centre, National Chemical Laboratory, Pune, India
| | - Luke Elizabeth Hanna
- National Institute for Research in Tuberculosis, Chennai, 600031, Tamil Nadu, India
| | - Vanaja Kumar
- Centre for Drug Discovery and Development, Sathyabama Institute of Science and Technology, Chennai, 600119, Tamil Nadu, India
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Chakraborty B, Shashiraj KN, Kumar RS, Bhat MP, Basavarajappa DS, Almansour AI, Perumal K, Nayaka S. Unveiling the Pharmacological Significance of Marine Streptomyces violaceusniger KS20: Isolation, Characterization, and Assessment of Its Biomedical Applications. Metabolites 2023; 13:1022. [PMID: 37755302 PMCID: PMC10536031 DOI: 10.3390/metabo13091022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 09/11/2023] [Accepted: 09/17/2023] [Indexed: 09/28/2023] Open
Abstract
Marine actinomycetes represent a highly favorable source of bioactive compounds and have been the mainstay of much research in recent years. Recent reports have shown that marine Streptomyces sp. can produce compounds with diverse and potent biological activities. Therefore, the key objective of the study was to isolate and screen a potential actinomycete from marine ecosystems of Devbagh and Tilmati beaches, Karwar. Streptomyces sp. KS20 was characterized and the ethyl acetate extract (EtOAc-Ex) was screened for biomedical applications. Streptomyces sp. KS20 produced grayish-white aerial and pale-yellow substrate mycelia and revealed an ancestral relationship with Streptomyces violaceusniger. Optimum growth of the organism was recorded at 30 °C and pH 7.0. The metabolite profiling of EtOAc-Ex expressed the existence of several bioactive metabolites, whereas the functional groups were indicated by Fourier transform infrared (FTIR) spectroscopy. A considerable antioxidant activity was shown for EtOAc-Ex with IC50 of 92.56 μg/mL. In addition to this, Streptomyces sp. KS20 exhibited significant antimicrobial properties, particularly against Escherichia coli, where a zone of inhibition measuring 36 ± 0.83 mm and a minimum inhibitory concentration (MIC) of 3.12 µg/mL were observed. The EtOAc-Ex even revealed significant antimycobacterial potency with IC50 of 6.25 μg/mL. Finally, the antiproliferative potentiality of EtOAc-Ex against A549 and PC-3 cell lines revealed a constant decline in cell viability while raising the concentration of EtOAc-Ex from 12.5 to 200 μg/mL. The IC50 values were determined as 94.73 μg/mL and 121.12 μg/mL for A549 and PC-3 cell lines, respectively. Overall, the exploration of secondary metabolites from marine Streptomyces sp. KS20 represents an exciting area of further research with the potential to discover novel bioactive compounds that could be developed into therapeutics for various medical applications.
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Affiliation(s)
- Bidhayak Chakraborty
- P.G. Department of Studies in Botany, Karnatak University, Dharwad 580003, India; (B.C.); (K.N.S.); (M.P.B.); (D.S.B.)
| | | | - Raju Suresh Kumar
- Department of Chemistry, College of Science, King Saud University, P.O. Box. 2455, Riyadh 11451, Saudi Arabia; (R.S.K.); (A.I.A.)
| | - Meghashyama Prabhakara Bhat
- P.G. Department of Studies in Botany, Karnatak University, Dharwad 580003, India; (B.C.); (K.N.S.); (M.P.B.); (D.S.B.)
| | | | - Abdulrahman I. Almansour
- Department of Chemistry, College of Science, King Saud University, P.O. Box. 2455, Riyadh 11451, Saudi Arabia; (R.S.K.); (A.I.A.)
| | - Karthikeyan Perumal
- Department of Chemistry and Biochemistry, The Ohio State University, 151 W. Woodruff Ave, Columbus, OH 43210, USA;
| | - Sreenivasa Nayaka
- P.G. Department of Studies in Botany, Karnatak University, Dharwad 580003, India; (B.C.); (K.N.S.); (M.P.B.); (D.S.B.)
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Balkrishna A, Sengupta S, Kumari P, Dev R, Haldar S, Varshney A. Anu Taila, an herbal nasal-drop, delays spore germination in Cunninghamella bertholletiae by reducing cAMP-PKA dependent ROS in mucorale pathogen and extrinsic ROS in human host cells. Lett Appl Microbiol 2023; 76:7008501. [PMID: 36708174 DOI: 10.1093/lambio/ovad014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 12/13/2022] [Accepted: 01/25/2023] [Indexed: 01/29/2023]
Abstract
The rare, fastest-germinating, frequently invasive mucorale, Cunninghamella bertholletiae, is intractable due to its imprecise etiology. Cunninghamella bertholletiae spores can infect both immunocompromised and immunocompetent individuals to cause mucormycosis. Sub-optimal drug-susceptibility further limits its treatment options. The classical nasal drop, Anu Taila, is reported to be effective against the rather prevalent mucorales, Mucor spp., making its anti-mucormycotic effect against C. bertholletiae worth testing. The inhibitory effect of Anu Taila against C. bertholletiae was manifested as microstructural alterations of the spores and their delayed germination. Anu Taila reduced the germination-promoting reactive oxygen species (ROS) levels in both the pathogen, C. bertholletiae, and the human host lung epithelial A549 cells. Expressions of structural (chitin synthase, trehalose synthase) and functional (cAMP-PKA) markers of spore germination were regulated by Anu Taila. cAMP-PKA expression and ROS generation are well-correlated, implicating the role of Anu Taila in delaying C. bertholletiae spore germination by targeting cAMP-PKA-mediated ROS generation. In conclusion, this study demonstrates that Anu Taila can create an opportunity for the host immune system to tackle the onset of C. bertholletiae infection by delaying its pathogenesis. This can be further leveraged to reinforce the host immune system through combinatorial treatment to prevent the establishment of the mucormycosis infection.
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Affiliation(s)
- Acharya Balkrishna
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar 249405, India.,Department of Allied and Applied Sciences, University of Patanjali, Haridwar 249405, India.,Vedic Acharya Samaj Foundation, Inc., NFP, FL 32811, United States.,Patanjali Yog Peeth (UK) Trust, Glasgow G41 1AU, United States
| | - Sohan Sengupta
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar 249405, India
| | - Priya Kumari
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar 249405, India
| | - Rishabh Dev
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar 249405, India
| | - Swati Haldar
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar 249405, India
| | - Anurag Varshney
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar 249405, India.,Department of Allied and Applied Sciences, University of Patanjali, Haridwar 249405, India.,Special Centre for Systems Medicine, Jawaharlal Nehru University, New Delhi 110067, India
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Świecimska M, Golińska P, Goodfellow M. Generation of a high quality library of bioactive filamentous actinomycetes from extreme biomes using a culture-based bioprospecting strategy. Front Microbiol 2023; 13:1054384. [PMID: 36741889 PMCID: PMC9893292 DOI: 10.3389/fmicb.2022.1054384] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 12/28/2022] [Indexed: 01/20/2023] Open
Abstract
Introduction Filamentous actinomycetes, notably members of the genus Streptomyces, remain a rich source of new specialized metabolites, especially antibiotics. In addition, they are also a valuable source of anticancer and biocontrol agents, biofertilizers, enzymes, immunosuppressive drugs and other biologically active compounds. The new natural products needed for such purposes are now being sought from extreme habitats where harsh environmental conditions select for novel strains with distinctive features, notably an ability to produce specialized metabolites of biotechnological value. Methods A culture-based bioprospecting strategy was used to isolate and screen filamentous actinomycetes from three poorly studied extreme biomes. Actinomycetes representing different colony types growing on selective media inoculated with environmental suspensions prepared from high-altitude, hyper-arid Atacama Desert soils, a saline soil from India and from a Polish pine forest soil were assigned to taxonomically predictive groups based on characteristic pigments formed on oatmeal agar. One hundred and fifteen representatives of the colour-groups were identified based on 16S rRNA gene sequences to determine whether they belonged to validly named or to putatively novel species. The antimicrobial activity of these isolates was determined using a standard plate assay. They were also tested for their capacity to produce hydrolytic enzymes and compounds known to promote plant growth while representative strains from the pine forest sites were examined to determine their ability to inhibit the growth of fungal and oomycete plant pathogens. Results Comparative 16S rRNA gene sequencing analyses on isolates representing the colour-groups and their immediate phylogenetic neighbours showed that most belonged to either rare or novel species that belong to twelve genera. Representative isolates from the three extreme biomes showed different patterns of taxonomic diversity and characteristic bioactivity profiles. Many of the isolates produced bioactive compounds that inhibited the growth of one or more strains from a panel of nine wild strains in standard antimicrobial assays and are known to promote plant growth. Actinomycetes from the litter and mineral horizons of the pine forest, including acidotolerant and acidophilic strains belonging to the genera Actinacidiphila, Streptacidiphilus and Streptomyces, showed a remarkable ability to inhibit the growth of diverse fungal and oomycete plant pathogens. Discussion It can be concluded that selective isolation and characterization of dereplicated filamentous actinomyctes from several extreme biomes is a practical way of generating high quality actinomycete strain libraries for agricultural, industrial and medical biotechnology.
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Affiliation(s)
- Magdalena Świecimska
- Department of Microbiology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University, Toruń, Poland,*Correspondence: Magdalena Świecimska, ✉
| | - Patrycja Golińska
- Department of Microbiology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University, Toruń, Poland,Patrycja Golińska, ✉
| | - Michael Goodfellow
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
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Maliehe TS, Mbambo M, Ngidi LS, Shandu JSE, Pooe OJ, Masoko P, Selepe TN. Bioprospecting of endophytic actinobacterium associated with Aloe ferox mill for antibacterial activity. BMC Complement Med Ther 2022; 22:258. [PMID: 36192707 PMCID: PMC9531469 DOI: 10.1186/s12906-022-03733-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 09/14/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The emergence of drug resistance among pathogens has resulted in renewed interest in bioprospecting for natural microbial products. METHODS This study aimed to bioprospecting endophytic actinobacterium associated with Aloe ferox Mill for its antibacterial activity. Endophytic actinomycetes were isolated from the gel of A. ferox Mill by surface sterilization technique using actinomycete isolation agar. The isolate with a promising antibacterial activity was identified using 16S rRNA sequence analysis. The minimum inhibitory concentration (MIC) of the extract was assessed by the micro-dilution method and its effect on the respiratory chain dehydrogenase (RCD) activity was ascertained by the iodonitrotetrazolium chloride (INT) assay. Fourier transform-infrared spectrophotometer (FTIR) and gas chromatography-mass spectrophotometry (GC-MS) were employed to identify functional groups and the chemical constituents, respectively. RESULTS The actinobacterium was found to be Streptomyces olivaceus CP016795.1. Its extract displayed noteworthy antibacterial activity (MIC ≤1 mg/mL) against Staphylococcus aureus (ATCC 25925), Bacillus cereus (ATCC 10102), and Escherichia coli (ATCC 25922); and showed an inhibitory effect on the RCD activity. FTIR spectrum displayed hydroxyl, amine, and aromatic groups, and the GC-MS revealed 5-Hydroxymethylfurfural as the main constituent (19.47%). CONCLUSIONS S. olivaceus CP016795.1 can serve as a potential source of effective antibacterial compounds.
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Affiliation(s)
- Tsolanku Sidney Maliehe
- grid.442325.6Department of Biochemistry and Microbiology, Faculty of Science and Agriculture, University of Zululand, P/ Bag X1001, KwaDlangezwa, 3886 South Africa ,grid.411732.20000 0001 2105 2799Department of Biochemistry, Microbiology and Biotechnology, University of Limpopo, Private bag X1106, Sovenga, 0727 South Africa
| | - Melusi Mbambo
- grid.442325.6Department of Biochemistry and Microbiology, Faculty of Science and Agriculture, University of Zululand, P/ Bag X1001, KwaDlangezwa, 3886 South Africa
| | - Londeka Sibusisiwe Ngidi
- grid.442325.6Department of Biochemistry and Microbiology, Faculty of Science and Agriculture, University of Zululand, P/ Bag X1001, KwaDlangezwa, 3886 South Africa
| | - Jabulani Siyabonga Emmanuel Shandu
- grid.442325.6Department of Biochemistry and Microbiology, Faculty of Science and Agriculture, University of Zululand, P/ Bag X1001, KwaDlangezwa, 3886 South Africa
| | - Ofentse Jacob Pooe
- grid.16463.360000 0001 0723 4123School of Life Science, Discipline of Biochemistry, University of KwaZulu-Natal, Westville, 4000 South Africa
| | - Peter Masoko
- grid.411732.20000 0001 2105 2799Department of Biochemistry, Microbiology and Biotechnology, University of Limpopo, Private bag X1106, Sovenga, 0727 South Africa
| | - Tlou Nelson Selepe
- grid.411732.20000 0001 2105 2799Department of Water and Sanitation, University of Limpopo, Private bag X1106, Sovenga, 0727 South Africa
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Zahroh EW, Ningsih F, Sjamsuridzal W. DETECTION OF ANTIMICROBIAL COMPOUNDS FROM THERMOPHILIC ACTINOMYCETES USING ONE STRAIN MANY COMPOUNDS (OSMAC) APPROACH. BIOLINK (JURNAL BIOLOGI LINGKUNGAN INDUSTRI KESEHATAN) 2022. [DOI: 10.31289/biolink.v9i1.6438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Actinomycetes are a group of filamentous bacteria with high biosynthetic potential that can produce secondary metabolites. Actinomycetes are known to produce secondary metabolites which are potential as antimicrobial, antitumor, and others. Actinomycetes can be found abundantly in diverse environments, including environments with extremely high temperatures such as hot springs, deserts, geothermal areas, and hydrothermal vents. They can survive in high temperatures due to their membrane lipids containing straight-chains and more saturated fatty acids that protect the membrane's fluidity to maintain membrane function. Thermophilic actinomycetes are potential producers of thermostable enzymes and bioactive compounds, which are important in the pharmaceutical, health, and industrial fields. Thermophilic actinomycetes are still less explored for novel metabolites and antimicrobial compounds due to the difficulty in isolation, maintenance, and preservation in pure culture. Novel bioactive compounds produced by actinomycetes are conventionally discovered by isolating potential strains and screening the compound bioactivity through various bioassays. A sequence-independent approach, termed the OSMAC (one strain many compounds), has been widely used in natural product research for activating cryptic biosynthetic gene clusters (BGCs) by modifying the growth conditions of a bacterial culture. This approach aims to optimize the number of secondary metabolites produced by one single microorganism. The application of the OSMAC method has been proven successful in revealing the biosynthetic potential of bacteria.
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Naligama KN, Weerasinghe KE, Halmillawewa AP. Characterization of Bioactive Actinomycetes Isolated from Kadolkele Mangrove Sediments, Sri Lanka. Pol J Microbiol 2022; 71:191-204. [PMID: 35676828 PMCID: PMC9252147 DOI: 10.33073/pjm-2022-017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 03/09/2022] [Indexed: 12/04/2022] Open
Abstract
Exploring untapped microbial potentials in previously uncharted environments has become crucial in discovering novel secondary metabolites and enzymes for biotechnological applications. Among prokaryotes, actinomycetes are well recognized for producing a vast range of secondary metabolites and extracellular enzymes. In the present study, we have used surface sediments from ‘Kadolkele’ mangrove ecosystem located in the Negombo lagoon area, Sri Lanka, to isolate actinomycetes with bioactive potentials. A total of six actinomycetes were isolated on modified-starch casein agar and characterized. The isolates were evaluated for their antibacterial activity against four selected bacterial strains and to produce extracellular enzymes: cellulase, amylase, protease, and lipase. Three out of the six isolates exhibited antibacterial activity against Staphylococcus aureus, Escherichia coli, and Bacillus cereus, but not against Listeria monocytogenes. Five strains could produce extracellular cellulase, while all six isolates exhibited amylase activity. Only three of the six isolates were positive for protease and lipase assays separately. Ac-1, Ac-2, and Ac-9, identified as Streptomyces spp. with the 16S rRNA gene sequencing, were used for pigment extraction using four different solvents. Acetone-extracted crude pigments of Ac-1 and Ac-2 were further used in well-diffusion assays, and growth inhibition of test bacteria was observed only with the crude pigment extract of Ac-2. Further, six different commercially available fabrics were dyed with crude pigments of Ac-1. The dyed fabrics retained the yellow color after acid, alkaline, and cold-water treatments suggesting the potential of the Ac-1 pigment to be used in biotechnological applications.
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Affiliation(s)
- Kishani N Naligama
- Department of Microbiology, Faculty of Science, University of Kelaniya, Kelaniya Sri Lanka
| | - Kavindi E Weerasinghe
- Department of Microbiology, Faculty of Science, University of Kelaniya, Kelaniya Sri Lanka
| | - Anupama P Halmillawewa
- Department of Microbiology, Faculty of Science, University of Kelaniya, Kelaniya Sri Lanka
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Ramalingam V, Rajaram R, Archunan G, Padmanabhan P, Gulyás B. Structural Characterization, Antimicrobial, Antibiofilm, Antioxidant, Anticancer and Acute Toxicity Properties of N-(2-hydroxyphenyl)-2-phenazinamine From Nocardiopsis exhalans (KP149558). Front Cell Infect Microbiol 2022; 12:794338. [PMID: 35663469 PMCID: PMC9161293 DOI: 10.3389/fcimb.2022.794338] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 03/24/2022] [Indexed: 11/13/2022] Open
Abstract
The present study aimed to isolate and identify potential drugs from marine actinomycete Nocardiopsis exhalans and screen them for biomedical applications. The cell-free culture of N. exhalans was extracted with ethyl acetate and the solvent extract showed six fractions in thin-layer chromatography. The fractions were subjected to column chromatography for purification and evaluated for activity against human clinical pathogens. Fraction 4 showed significant activity and was identified as N-(2-hydroxyphenyl)-2-phenazinamine (NHP) using spectral analyses. Further, NHP showed excellent biofilm inhibitory activity against human clinical pathogens Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus. The in vitro antioxidant activity confirmed that NHP is scavenging the oxidative stress-enhancing molecules. The anti-proliferative activity of NHP against human breast cancer cells showed significant activity at 300 µg/ml and less cytotoxic activity against normal cells. Additionally, the toxicity assessment against zebrafish revealed that NHP does not cause any toxicity in the important organs. The results highlight N. exhalans as a promising candidate for the development of antibiotics with potential therapeutic applications.
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Affiliation(s)
- Vaikundamoorthy Ramalingam
- Centre for Natural Products and Traditional Knowledge, Indian Institute of Chemical Technology, Hyderabad, India
- DNA Barcoding and Marine Genomics Lab, Department of Marine Science, Bharathidasan University, Tiruchirappalli, India
- *Correspondence: Vaikundamoorthy Ramalingam, ; Parasuraman Padmanabhan,
| | - Rajendran Rajaram
- DNA Barcoding and Marine Genomics Lab, Department of Marine Science, Bharathidasan University, Tiruchirappalli, India
| | - Govindaraju Archunan
- Department of Animal Science, Bharathidasan University Tiruchirappalli, Tamil Nadu, India
- Dean of Research, Marudupandiyar College, Thanjavur, India
| | - Parasuraman Padmanabhan
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
- Cognitive Neuroimaging Centre, Nanyang Technological University, Nanyang Technological University, Singapore, Singapore
- Imaging Probe Development Platform (IPDP), Nanyang Technological University, Singapore, Singapore
- *Correspondence: Vaikundamoorthy Ramalingam, ; Parasuraman Padmanabhan,
| | - Balázs Gulyás
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
- Cognitive Neuroimaging Centre, Nanyang Technological University, Nanyang Technological University, Singapore, Singapore
- Imaging Probe Development Platform (IPDP), Nanyang Technological University, Singapore, Singapore
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Chakraborty B, Kumar RS, Almansour AI, Gunasekaran P, Nayaka S. Bioprospection and secondary metabolites profiling of marine Streptomyces levis strain KS46. Saudi J Biol Sci 2022; 29:667-679. [PMID: 35197732 PMCID: PMC8847965 DOI: 10.1016/j.sjbs.2021.11.055] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 11/09/2021] [Accepted: 11/24/2021] [Indexed: 11/25/2022] Open
Abstract
The quest for novel broad spectrum bioactive compounds is needed continuously because of the rapid advent of pathogenic multi drug resistant organisms. Actinomycetes, isolated from unexplored habitats can be a solution of this problem. The motive of this research work was isolation of actinomycetes having potential antimicrobial activities from unexplored regions of Devbag and Tilmati beach. The isolated actinomycetes were screened against pathogenic microbes for antimicrobial activities through cross streak method. Enzyme production activity was checked for these actinomycetes for amylase, protease, cellulase and lipase enzymes. Further antimicrobial activity of ethyl acetate extract of the potent strain KS46 was performed. The strain KS46 was identified with 16S rRNA gene sequencing and secondary structure was analysed. Gas chromatography–Mass spectrometry (GC–MS) profiling was conducted to ascertain the presence of bioactive metabolites in the ethyl acetate extract. The collected samples were pre-treated and 70 actinomycetes were isolated. The Streptomyces sp. strain KS46 showed the best antimicrobial activity in primary screening. Ethyl acetate extract of the strain KS46 revealed antimicrobial activity against S. aureus, B. subtilis, B. cereus, E. faecalis, K. pneumoniae, E. coli, S. flexneri, C. albicans and C. glabrata. The 16S rRNA gene sequencing identified the strain KS46 as Streptomyces levis strain KS46. The GC–MS metabolite profiling of the ethyl acetate extract revealed the availability of 42 compounds including fatty acid esters, fatty acid anhydrides, alkanes, steroids, esters, alcohols, carboxylic ester, etc. having antibacterial, antifungal, antiproliferative, antioxidant activities. This study indicated that Devbag and Tilmati beaches being untapped habitats have enormous diversity of promising antimicrobial metabolite producing actinomycetes. Therefore, further exploration should be carried out to characterize the potential actinomycetes, which can be optimistic candidates for generation of novel antimicrobial drugs.
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Geraldi A, Famunghui M, Abigail M, Siona Saragih CF, Febitania D, Elmarthenez H, Putri CA, Putri Merdekawati UAS, Sadila AY, Wijaya NH. Screening of antibacterial activities of Bacillus spp. isolated from the Parangkusumo coastal sand dunes, Indonesia. BIO INTEGRATION 2022. [DOI: 10.15212/bioi-2022-0005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Background: The emergence of multidrug-resistant bacteria because of poor understanding of the issue and the misuse of antibiotics has become global health concern. Therefore, the discovery of novel antibacterial drugs is urgently needed. New antibacterial compounds may be found in the Bacillus species, which are abundant in sand dune ecosystems. Herein, we examined samples from the Parangkusumo coastal sand dunes in Indonesia.Methods: Samples were collected from three areas in the sand dunes (the area closest to the sea, the core area of sand dunes, and the area farthest from the sea). The samples were inoculated on Luria Bertani agar. Morphological and molecular identification was performed on the basis of 16S rRNA. The samples’ antimicrobial activity was evaluated with the disc diffusion method and compared with that of opportunistic pathogenic bacteria.Results: Five species of Bacillus were successfully isolated from the Parangkusumo coastal sand dunes. To our knowledge, this is the first report of the isolation of Bacillus aryabhattai in Indonesia. All samples showed antimicrobial activity against pathogenic bacteria. B. velezensis and B. subtilis showed antibacterial activity against Gram-positive bacteria, whereas B. aryabhattai and B. megaterium showed antibacterial activity against Gram-negative bacteria, and B. spizizenii showed antibacterial activity toward Gram-positive and Gram-negative bacteria.Conclusion: Five Bacillus species were successfully isolated from the Parangkusumo coastal sand dunes, Indonesia, and all samples showed antimicrobial activity toward opportunistic pathogenic bacteria. The crude antimicrobial compounds from B. megaterium, B. aryabhattai, B. subtilis, and B. spizizenii showed the highest growth-inhibition activity against E. coli, P. aeruginosa, B. cereus, and S. aureus, respectively.
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Affiliation(s)
- Almando Geraldi
- University-Center of Excellence-Research Center for Bio-Molecule Engineering, Universitas Airlangga, Surabaya 60115, Indonesia
- Department of Biology, Faculty of Science and Technology, Universitas Airlangga, Surabaya 60115, Indonesia
| | - Margareth Famunghui
- School of Life Sciences and Technology, Institut Teknologi Bandung, Bandung 40132, Indonesia
| | - Mercyana Abigail
- School of Life Sciences and Technology, Institut Teknologi Bandung, Bandung 40132, Indonesia
| | | | - Devina Febitania
- School of Life Sciences and Technology, Institut Teknologi Bandung, Bandung 40132, Indonesia
| | - Henrietta Elmarthenez
- Department of Biology, Faculty of Science and Technology, Universitas Airlangga, Surabaya 60115, Indonesia
| | - Cinantya Aulia Putri
- Department of Biology, Faculty of Science and Technology, Universitas Airlangga, Surabaya 60115, Indonesia
| | | | - Aliffa Yusti Sadila
- Department of Biology, Faculty of Science and Technology, Universitas Airlangga, Surabaya 60115, Indonesia
| | - Nabilla Hapsari Wijaya
- Department of Biology, Faculty of Science and Technology, Universitas Airlangga, Surabaya 60115, Indonesia
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Govindarajan G, Mullick P, Samuel Raj BA, Kumar PS, Al-Ansari MM, Ilavenil S, Jebakumar Solomon RD. Susceptibility pattern of methicillin resistance Staphylococcus aureus (MRSA) by flow cytometry analysis and characterization of novel lead drug molecule from Streptomyces species. J Infect Public Health 2021; 14:1831-1841. [PMID: 34782289 DOI: 10.1016/j.jiph.2021.11.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Revised: 10/29/2021] [Accepted: 11/02/2021] [Indexed: 10/19/2022] Open
Abstract
BACKGROUND Actinomycetes particularly, Streptomyces species are producing wide variety of natural products with potential bioactivities. The microbial-derived metabolites hold a strong position to combat emerging and re-emerging antimicrobial drug-resistant pathogens. OBJECTIVES A diverse group of actinomycetes strains were isolated from unexplored regions of mangrove sediment. Further, a polyphasic approach based on 16S rRNA gene sequence analysis and to evaluate their antibacterial potential against a panel of bacterial pathogens and methicillin resistance Staphylococcus aureus (MRSA). METHODS The mangrove sediment samples were serially diluted with sterile water and plated on inorganic starch agar medium. A total of 20 isolates were pure cultured and 16S rRNA gene sequences were deposited in the public nucleotide databases (GenBank, NCBI). All the isolates were screened for the antibacterial activity by agar overlay method. Further, the susceptibility pattern of MRSA by flow cytometry and fluorescence microscopy was analysed. RESULTS These twenty different isolates were grouped under nine major clad and they shared 95-99% sequence identity to the 16S rRNA gene sequences of the genus Streptomyces in the public nucleotide databases. Among these strains, the isolates namely JRG-02, JRG-03, JRG-04, JRG-10 and JRG-12 exhibited a broad-spectrum antibacterial activity against Methicillin-resistant Staphylococcus aureus(MRSA) and Gram negative bacteria Klebsiella pneumoniae MTCC109. Furthermore, we have characterized the antibacterial compound production and its properties from the isolate JRG-02, a potential drug candidate. The culture conditions and various nutrient components of strain Streptomyces sp. JRG-02 were optimized for enhanced antibiotics production of the isolate. The FT-IR and LCMS spectrum analysis envisaged the chemical nature of the substance. The effect of antibacterial compound on the viability of MRSA was alone examined by flow cytometry (FACS) and fluorescence microscopy analysis. CONCLUSIONS The present study clearly shows that the survival of diverse inhabitants of Streptomyces in the mangrove sediments. Hence, the mangrove sediment inhabiting strain Streptomyces sp. JRG-02 has potential pharmaceutical activity and genetic diversity.
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Affiliation(s)
- Ganesan Govindarajan
- Department of Molecular Microbiology, School of Biotechnology, Madurai Kamaraj University, Madurai, 625021, Tamil Nadu, India; CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 XinGang Road West, Guangzhou 510301, China.
| | - Priya Mullick
- Department of Molecular Microbiology, School of Biotechnology, Madurai Kamaraj University, Madurai, 625021, Tamil Nadu, India
| | | | - Pachaiyappan Saravana Kumar
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 XinGang Road West, Guangzhou 510301, China
| | - Mysoon M Al-Ansari
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Soundharrajan Ilavenil
- Grassland and Forages Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Republic of Korea
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Fadhilah QG, Santoso I, Maryanto AE, Abdullah S, Yasman Y. Evaluation of the antifungal activity of marine actinomycetes isolates against the phytopathogenic fungi Colletotrichum siamense KA: A preliminary study for new antifungal compound discovery. PHARMACIA 2021. [DOI: 10.3897/pharmacia.68.e72817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Marine actinomycetes are being explored to discover potential actinomycetes that produce antifungal compounds. In a previous study, marine actinomycetes isolates from the mangrove ecosystem were found to inhibit growth of the phytopathogenic fungi Colletotrichum siamense KA. In this study, the three of these isolates with the highest antagonistic activity—SM11, SM14, and SM15—were evaluated for their antifungal activity using antibiosis assay. The fermentation was performed in SCB:PDB medium (1:1) for 6, 9, and 12 days. The results showed that SM14 was the strongest potential isolate; it inhibited the growth of C. siamense KA on average up to 64.90% for 12 days on PDA filtrate medium. Molecular identification showed SM14 was closely related to Streptomyces sanyensis, but had differences in morphological and biochemical characteristics compared to SM11 or SM15. This indicated that the three isolates were different strains and may challenge further research on identifying and analyzing their antifungal compounds.
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Sepúlveda-Correa A, Daza-Giraldo LV, Polanía J, Arenas NE, Muñoz-García A, Sandoval-Figueredo AV, Vanegas J. Genes associated with antibiotic tolerance and synthesis of antimicrobial compounds in a mangrove with contrasting salinities. MARINE POLLUTION BULLETIN 2021; 171:112740. [PMID: 34304060 DOI: 10.1016/j.marpolbul.2021.112740] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 06/22/2021] [Accepted: 07/15/2021] [Indexed: 06/13/2023]
Abstract
Salinity and wastewater pollution in mangrove ecosystems can affect microorganisms and the abundance of genes involved in response to these stressors. This research aimed to identify genes associated with resistance and biosynthesis of antimicrobial compounds in mangrove soils subjected to contrasting salinities and wastewater pollution. Samples of rhizospheric soil were taken from a mangrove at the mouth of the Ranchería River in La Guajira, Colombia. A functional analysis was performed using Illumina HiSeq 2500 sequencing data obtained from total DNA extracted. Increased salt concentration influenced metabolic pathways and differential abundance of genes associated with the synthesis of antimicrobial compounds (e.g., rfbB/rffG, INO1/ISYNA1, rfbA/rffH, sat/met3, asd). Also, among 33 genes involved in intrinsic antibiotic resistance, 16 were significantly influenced by salinity (e.g., cusR/copR/silR, vgb, tolC). We concluded that salt stress tolerance and adaptive mechanisms could favor the biosynthesis of antimicrobial compounds in mangroves contaminated by sewage.
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Affiliation(s)
| | | | - Jaime Polanía
- Universidad Nacional de Colombia Sede Medellín, Cra. 65 #59a-110, Medellín, Colombia
| | - Nelson E Arenas
- Universidad Antonio Nariño, Sede Circunvalar, Cra 3 Este No. 47 A 15, Bogotá, Colombia
| | | | | | - Javier Vanegas
- Universidad Antonio Nariño, Sede Circunvalar, Cra 3 Este No. 47 A 15, Bogotá, Colombia.
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Oliveira THBDE, Gusmão NBDE, Silva LAODA, Coelho LCBB. Free Radicals and Actinobacteria as a Misexplored Goldmine of Antioxidant Compounds. AN ACAD BRAS CIENC 2021; 93:e20201925. [PMID: 34586182 DOI: 10.1590/0001-3765202120201925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 03/23/2021] [Indexed: 11/22/2022] Open
Abstract
Free radicals are highly reactive unstable molecules, which can be synthesized in different ways, considered harmful and threatening to humans; these chemical species have free traffic throughout the human body, interacting with biological molecules and human body organ tissues. The interaction between free radicals and biological molecules is the main factor for disease development or pre-existing disease symptoms aggravation. Antioxidants are chemical compounds able to donate electric charge to stabilize molecules such as free radicals. Recent studies have proved the benefits of antioxidants intake in health improvement. In this way, the search for natural sources of antioxidants has become an ascending trend. In this field, the microbial sources are considered poorly explored compared to the numerous amount of other compounds obtained from them, especially from Actinobacteria. The searched literature about Actinobacteria highlights an important capacity of producing natural antioxidants; however, there is a lack of in vivo studies of these isolated compounds. In this review, we gathered information that supports our point of view that Actinobacteria is a truly renewable and superficially explored source of natural antioxidants. Furthermore, our purpose is also to point this limitation and stimulate more researches in this area.
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Affiliation(s)
- Thales Henrique B DE Oliveira
- Universidade Federal de Pernambuco, Departamento de Bioquímica, Centro de Biociências, Avenida Professor Moraes Rego, s/n, Cidade Universitária, 50670-420 Recife, PE, Brazil
| | - Norma B DE Gusmão
- Universidade Federal de Pernambuco, Departamento de Antibióticos, Centro de Biociências, Avenida dos Economistas, s/n, Cidade Universitária, 52171-011 Recife, PE, Brazil
| | - Leonor A O DA Silva
- Universidade Federal da Paraíba, Departamento de Biologia Molecular, Centro de Ciências Exatas e da Natureza, Conjunto Presidente Castelo Branco III, 58033-455 João Pessoa, PB, Brazil
| | - Luana C B B Coelho
- Universidade Federal de Pernambuco, Departamento de Bioquímica, Centro de Biociências, Avenida Professor Moraes Rego, s/n, Cidade Universitária, 50670-420 Recife, PE, Brazil
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Rakhmawatie MD, Wibawa T, Lisdiyanti P, Pratiwi WR, Damayanti E, Mustofa. Potential secondary metabolite from Indonesian Actinobacteria (InaCC A758) against Mycobacterium tuberculosis. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES 2021; 24:1058-1068. [PMID: 34804423 PMCID: PMC8591762 DOI: 10.22038/ijbms.2021.56468.12601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 07/04/2021] [Indexed: 11/27/2022]
Abstract
OBJECTIVES This study explored Indonesian Actinobacteria which were isolated from Curcuma zedoaria endophytic microbes and mangrove ecosystem for new antimycobacterial compounds. MATERIALS AND METHODS Antimycobacterial activity test was carried out against Mycobacterium tuberculosis H37Rv. Chemical profiling of secondary metabolite using Gas Chromatography-Mass Spectroscopy (GC-MS) and High Resolution-Mass Spectroscopy (HR-MS) was done to the ethyl acetate extract of active strain InaCC A758. Molecular taxonomy analysis based on 16S rRNA gene and biosynthetic gene clusters analysis of polyketide synthase (PKS) and non-ribosomal peptide synthetase (NRPS) from InaCC A758 have been carried out. Bioassay guided isolation of ethyl acetate extract was done, then structural elucidation of active compound was performed using UV-Vis, FT-IR, and NMR spectroscopy methods. RESULTS The chemical profiling using HR-MS revealed that InaCC A758 has the potential to produce new antimycobacterial compounds. The 16S rRNA gene sequencing showed that InaCC A758 has the closest homology to Streptomyces parvus strain NBRC 14599 (99.64%). In addition, InaCC A758 has NRPS gene and related to S. parvulus (92% of similarity), and also PKS gene related to PKS-type borrelidin of S. rochei and S. parvulus (74% of similarity). Two compounds with potential antimycobacterial were predicted as 1) Compound 1, similar to dimethenamid (C12H18ClNO2S; MW 275.0723), with MIC value of 100 µg/ml, and 2) Compound 2, actinomycin D (C62H86N12O16; MW 1254.6285), with MIC value of 0.78 µg/ml. CONCLUSION Actinomycin D has been reported to have antimycobacterial activity, however the compound has been predicted to resemble dimethenamid had not been reported to have similar activity.
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Affiliation(s)
- Maya Dian Rakhmawatie
- Doctoral Program in Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia , Department of Biomedical Sciences, Faculty of Medicine, Universitas Muhammadiyah Semarang, Semarang 50273, Indonesia
| | - Tri Wibawa
- Department of Microbiology, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia
| | - Puspita Lisdiyanti
- Research Center for Biotechnology, Indonesian Institute of Sciences, Kabupaten Bogor, West Java 16911, Indonesia
| | - Woro Rukmi Pratiwi
- Department of Pharmacology and Therapy, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia
| | - Ema Damayanti
- Research Division of Natural Product Technology, Indonesian Institute of Sciences, Yogyakarta 55861, Indonesia
| | - Mustofa
- Department of Pharmacology and Therapy, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia,Corresponding author: Mustofa Mustofa. Department of Pharmacology and Therapy, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia. Tel +62 813 2874 9273;
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Mohamed H, Hassane A, Rawway M, El-Sayed M, Gomaa AER, Abdul-Raouf U, Shah AM, Abdelmotaal H, Song Y. Antibacterial and cytotoxic potency of thermophilic Streptomyces werraensis MI-S.24-3 isolated from an Egyptian extreme environment. Arch Microbiol 2021; 203:4961-4972. [PMID: 34263338 DOI: 10.1007/s00203-021-02487-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 07/07/2021] [Accepted: 07/09/2021] [Indexed: 11/28/2022]
Abstract
The need for novel and active antibiotics specially from actinomycetes is essential due to new and drug-resistant pathogens. In this study, 87 actinomycetes were isolated, and 18 strains among them characterized as thermophilic actinomycetes. Further fractionation and preliminary antibacterial activities indicated that one strain, coded as MI-S.24-3, showed good antibacterial activity. Based on the phenotypic, genomic, phylogenetic, and biochemical analyses, MI-S.24-3 was identified as Streptomyces werraensis. Results demonstrated that the ethyl acetate active fraction showed maximum antibacterial activity against Staphylococcus aureus and Escherichia coli with MIC (12.7 ± 0.1 and 18.3 ± 0.2 mg/mL), and MBC (96.5 ± 1.4 and 91.5 ± 0.7 mg/mL), respectively, with determination of time kill kinetics assay. The active fraction showed moderate-to-weak cytotoxic effects against human lung carcinoma (A549 cells), breast cancer cell line (MCF-7), and human cervical carcinoma (HELA cells) with a IC50 of (23.8 ± 1.2, 54 ± 1.8, 96.4 ± 3.2 μg/mL, respectively). Active components were characterised by different chemically volatile, ester, and lactone compounds, determined by GC-MS coupled with daughter ions of (GC-MS/MS). Notably, erucic acid and reynosin identified compounds are rare metabolites produced by Streptomyces werraensis. Our findings demonstrated that the MI-S.24-3 strain could be a potential source for active compounds of biomedical and pharmaceutical interest.
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Affiliation(s)
- Hassan Mohamed
- Colin Ratledge Center for Microbial Lipids, School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, 255000, China
- Department of Botany and Microbiology, Faculty of Science, Al-Azhar University, Assiut, 71524, Egypt
| | - Abdallah Hassane
- Department of Botany and Microbiology, Faculty of Science, Al-Azhar University, Assiut, 71524, Egypt
| | - Mohammed Rawway
- Department of Botany and Microbiology, Faculty of Science, Al-Azhar University, Assiut, 71524, Egypt
- Biology Department, College of Science, Jouf University, Sakakah, 2014, Saudi Arabia
| | - Mohamed El-Sayed
- Department of Botany and Microbiology, Faculty of Science, Al-Azhar University, Cairo, 11884, Egypt
- Department of Biology, Faculty of Science and Arts, Northern Border University, Rafha, Saudi Arabia
| | - Abd El-Rahman Gomaa
- Department of Botany and Microbiology, Faculty of Science, Al-Azhar University, Assiut, 71524, Egypt
| | - Usama Abdul-Raouf
- Department of Botany and Microbiology, Faculty of Science, Al-Azhar University, Assiut, 71524, Egypt
| | - Aabid Manzoor Shah
- Colin Ratledge Center for Microbial Lipids, School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, 255000, China
| | - Heba Abdelmotaal
- Institute of Microbe and Host Health, Linyi University, Linyi, 276005, China
- Department of Microbiology, Soil, Water, Environment, and Microbiology Research Institute, Agriculture Research Centre, Giza, 12619, Egypt
| | - Yuanda Song
- Colin Ratledge Center for Microbial Lipids, School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, 255000, China.
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Jagannathan SV, Manemann EM, Rowe SE, Callender MC, Soto W. Marine Actinomycetes, New Sources of Biotechnological Products. Mar Drugs 2021; 19:365. [PMID: 34201951 PMCID: PMC8304352 DOI: 10.3390/md19070365] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 06/14/2021] [Accepted: 06/21/2021] [Indexed: 02/07/2023] Open
Abstract
The Actinomycetales order is one of great genetic and functional diversity, including diversity in the production of secondary metabolites which have uses in medical, environmental rehabilitation, and industrial applications. Secondary metabolites produced by actinomycete species are an abundant source of antibiotics, antitumor agents, anthelmintics, and antifungals. These actinomycete-derived medicines are in circulation as current treatments, but actinomycetes are also being explored as potential sources of new compounds to combat multidrug resistance in pathogenic bacteria. Actinomycetes as a potential to solve environmental concerns is another area of recent investigation, particularly their utility in the bioremediation of pesticides, toxic metals, radioactive wastes, and biofouling. Other applications include biofuels, detergents, and food preservatives/additives. Exploring other unique properties of actinomycetes will allow for a deeper understanding of this interesting taxonomic group. Combined with genetic engineering, microbial experimental evolution, and other enhancement techniques, it is reasonable to assume that the use of marine actinomycetes will continue to increase. Novel products will begin to be developed for diverse applied research purposes, including zymology and enology. This paper outlines the current knowledge of actinomycete usage in applied research, focusing on marine isolates and providing direction for future research.
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Affiliation(s)
| | | | | | | | - William Soto
- Department of Biology, College of William & Mary, Williamsburg, VA 23185, USA; (S.V.J.); (E.M.M.); (S.E.R.); (M.C.C.)
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Nag S, Biswas A, Chattopadhyay D, Bhattacharyya M. Protein-stabilized silver nanoparticles encapsulating gentamycin for the therapy of bacterial biofilm infections. Nanomedicine (Lond) 2021; 16:801-818. [PMID: 33900109 DOI: 10.2217/nnm-2020-0451] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: An antibiotic-conjugated protein-stabilized nanoparticle hybrid system was developed to combat the challenges faced during the treatment of drug-resistant bacterial biofilm-associated infections. Materials & methods: Biocompatible silver nanoparticles were synthesized using intracellular protein and gentamycin was attached. The resulting nanohybrid was characterized and its antibacterial efficiency was assessed against Gram-positive, Gram-negative and drug-resistant bacteria. Results: Spectroscopic and electron microscopic analysis revealed that the nanoparticles were spherical with a diameter of 2-6 nm. Red-shifting of the surface plasmon peak and an increase in hydrodynamic diameter confirmed attachment of gentamycin. The nanohybrid exhibited antibacterial efficiency against a range of bacteria with the ability to inhibit and disrupt bacterial biofilm. Conclusion: A unique nanohybrid was designed that has potential to be used to control drug-resistant bacterial infections in the future.
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Affiliation(s)
- Sudip Nag
- Department of Biochemistry, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Arpita Biswas
- Department of Biochemistry, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | | | - Maitree Bhattacharyya
- Department of Biochemistry, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India.,Jagadis Bose National Science Talent Search, 1300 Rajdanga Main Road, Kolkata, 700107, India
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16S rRNA gene amplicon-based metagenomic analysis of bacterial communities in the rhizospheres of selected mangrove species from Mida Creek and Gazi Bay, Kenya. PLoS One 2021; 16:e0248485. [PMID: 33755699 PMCID: PMC7987175 DOI: 10.1371/journal.pone.0248485] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 02/28/2021] [Indexed: 12/30/2022] Open
Abstract
Prokaryotic communities play key roles in biogeochemical transformation and cycling of nutrients in the productive mangrove ecosystem. In this study, the vertical distribution of rhizosphere bacteria was evaluated by profiling the bacterial diversity and community structure in the rhizospheres of four mangrove species (Sonneratia alba, Rhizophora mucronata, Ceriops tagal and Avicennia marina) from Mida Creek and Gazi Bay, Kenya, using DNA-metabarcoding. Alpha diversity was not significantly different between sites, but, significantly higher in the rhizospheres of S. alba and R. mucronata in Gazi Bay than in Mida Creek. Chemical parameters of the mangrove sediments significantly correlated inversely with alpha diversity metrics. The bacterial community structure was significantly differentiated by geographical location, mangrove species and sampling depth, however, differences in mangrove species and sediment chemical parameters explained more the variation in bacterial community structure. Proteobacteria (mainly Deltaproteobacteria and Gammaproteobacteria) was the dominant phylum while the families Desulfobacteraceae, Pirellulaceae and Syntrophobacteraceae were dominant in both study sites and across all mangrove species. Constrained redundancy analysis indicated that calcium, potassium, magnesium, electrical conductivity, pH, nitrogen, sodium, carbon and salinity contributed significantly to the species–environment relationship. Predicted functional profiling using PICRUSt2 revealed that pathways for sulfur and carbon metabolism were significantly enriched in Gazi Bay than Mida Creek. Overall, the results indicate that bacterial community composition and their potential function are influenced by mangrove species and a fluctuating influx of nutrients in the mangrove ecosystems of Gazi Bay and Mida Creek.
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Jose PA, Maharshi A, Jha B. Actinobacteria in natural products research: Progress and prospects. Microbiol Res 2021; 246:126708. [PMID: 33529791 DOI: 10.1016/j.micres.2021.126708] [Citation(s) in RCA: 80] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 01/12/2021] [Accepted: 01/16/2021] [Indexed: 12/15/2022]
Abstract
Actinobacteria are well-recognised biosynthetic factories that produce an extensive spectrum of secondary metabolites. Recent genomic insights seem to impact the exploitation of these metabolically versatile bacteria in several aspects. Notably, from the isolation of novel taxa to the discovery of new compounds, different approaches evolve at a steady pace. Here, we systematically discuss the enduring importance of Actinobacteria in the field of drug discovery, the current focus of isolation efforts targeting bioactive Actinobacteria from diverse sources, recent discoveries of novel compounds with different bioactivities, and the relative employment of different strategies in the search for novel compounds. Ultimately, we highlight notable progress that will have profound impacts on future quests for secondary metabolites of Actinobacteria.
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Affiliation(s)
- Polpass Arul Jose
- Marine Biotechnology and Ecology Division, CSIR- Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar, Gujarat, 364002, India.
| | - Anjisha Maharshi
- Marine Biotechnology and Ecology Division, CSIR- Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar, Gujarat, 364002, India
| | - Bhavanath Jha
- Marine Biotechnology and Ecology Division, CSIR- Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar, Gujarat, 364002, India; Academy of Scientific and Innovative Research (AcSIR), CSIR, India.
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25
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Zerrifi SEA, Redouane EM, Mugani R, Ribeiro I, de Fátima Carvalho M, Campos A, Barakate M, Vasconcelos V, Oudra B, El Khalloufi F. Moroccan actinobacteria with promising activity against toxic cyanobacteria Microcystis aeruginosa. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:235-245. [PMID: 32808126 DOI: 10.1007/s11356-020-10439-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 08/06/2020] [Indexed: 06/11/2023]
Abstract
In recent decades, harmful cyanobacterial blooms (HCBs) have become a severe hazard for human health mainly in drinking water resources and are responsible for serious ecological disturbances in freshwater ecosystems. The present study aims to explore the potential of actinobacteria isolated from sediment samples collected from Moroccan salt river to control HCBs mainly through Microcystis aeruginosa lysis. In order to investigate the possible anti-cyanobacterial response mechanisms, the antioxidant enzyme activities of M. aeruginosa cells were analysed. Anti-cyanobacterial activity was tested using the agar cylinder method against the toxic cyanobacteria Microcystis aeruginosa. Amongst the twenty-three isolates tested, only one showed promising anti-cyanobacterial activities with inhibition zone (ZI) equal to 22.00 mm, minimum inhibitory concentration (MIC) equal to 19.53 mg/L and minimum bactericidal concentration MBC equal to 39.06 mg/L. Phylogenetic analysis of the near-complete 16S rRNA gene sequence indicated that the strain DS1R1 belongs to the genus Streptomyces and has the highest similarity (100%) to Streptomyces sp. Indeed, M. aeruginosa growth, chlorophyll-a and protein content were significantly reduced by Streptomyces sp. DS1R1 extract. Superoxide dismutase (SOD), catalase (CAT) and malondialdehyde (MDA) were significantly elevated after treatment with Streptomyces sp. DS1R1 extract. These experimental findings provided insights in the development of a new eco-friendly procedure based on the use of actinobacteria for toxic cyanobacterial bloom bio-control.
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Affiliation(s)
- Soukaina El Amrani Zerrifi
- Water, Biodiversity and Climate Change Laboratory. Phycology, Biotechnology and Environmental Toxicology Research Unit, Faculty of Sciences Semlalia Marrakech, Cadi Ayyad University, Av. Prince My Abdellah, P.O. Box 2390, 40000, Marrakech, Morocco
| | - El Mahdi Redouane
- Water, Biodiversity and Climate Change Laboratory. Phycology, Biotechnology and Environmental Toxicology Research Unit, Faculty of Sciences Semlalia Marrakech, Cadi Ayyad University, Av. Prince My Abdellah, P.O. Box 2390, 40000, Marrakech, Morocco
| | - Richard Mugani
- Water, Biodiversity and Climate Change Laboratory. Phycology, Biotechnology and Environmental Toxicology Research Unit, Faculty of Sciences Semlalia Marrakech, Cadi Ayyad University, Av. Prince My Abdellah, P.O. Box 2390, 40000, Marrakech, Morocco
| | - Inês Ribeiro
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208, Matosinhos, Portugal
| | - Maria de Fátima Carvalho
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208, Matosinhos, Portugal
| | - Alexandre Campos
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208, Matosinhos, Portugal
| | - Mustapha Barakate
- Laboratory of Microbial Biotechnologies, Agrosciences and Environment, Faculty of Science Semlalia Marrakech, Cadi Ayyad University, Av. Prince My Abdellah, P.O. Box 2390, 40000, Marrakech, Morocco
| | - Vitor Vasconcelos
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208, Matosinhos, Portugal.
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007, Porto, Portugal.
| | - Brahim Oudra
- Water, Biodiversity and Climate Change Laboratory. Phycology, Biotechnology and Environmental Toxicology Research Unit, Faculty of Sciences Semlalia Marrakech, Cadi Ayyad University, Av. Prince My Abdellah, P.O. Box 2390, 40000, Marrakech, Morocco
| | - Fatima El Khalloufi
- Laboratory of Chemistry, Modeling and Environmental Sciences, Polydisciplinary Faculty of Khouribga, Sultan Moulay Slimane University of Beni Mellal, B.P. 145, 25000, Khouribga, Morocco
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Nayaka S, Chakraborty B, Bhat MP, Nagaraja SK, Airodagi D, Swamy PS, Rudrappa M, Hiremath H, Basavarajappa DS, Kanakannanavar B. Biosynthesis, characterization, and in vitro assessment on cytotoxicity of actinomycete-synthesized silver nanoparticles on Allium cepa root tip cells. BENI-SUEF UNIVERSITY JOURNAL OF BASIC AND APPLIED SCIENCES 2020. [DOI: 10.1186/s43088-020-00074-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
The industrial production of silver nanoparticles (AgNPs) and its commercial applications are being considerably increased in recent times, resulting in the release of AgNPs in the environment and enhanced probability of contaminations and their adverse effects on living systems. Based on this, the present study was conducted to evaluate the in vitro cytotoxicity of actinomycete-synthesized AgNPs on Allium cepa (A. cepa) root tip cells. A green synthesis method was employed for biosynthesis of AgNPs from Streptomyces sp. NS-33. However, morphological, physiological, biochemical, and molecular analysis were carried out to characterize the strain NS-33. Later, the synthesized AgNPs were characterized and antibacterial activity was also carried out against pathogenic bacteria. Finally, cytotoxic activity was evaluated on A. cepa root tip cells.
Results
Results showed the synthesis of spherical and polydispersed AgNPs with a characteristic UV-visible (UV-Vis.) spectral peak at 397 nm and average size was 32.40 nm. Energy dispersive spectroscopy (EDS) depicted the presence of silver, whereas Fourier transform infrared (FTIR) studies indicated the presence of various functional groups. The phylogenetic relatedness of Streptomyces sp. NS-33 was found with Streptomyces luteosporeus through gene sequencing. A good antibacterial potential of AgNPs was observed against two pathogenic bacteria. Concerning cytotoxicity, a gradually decreased mitotic index (MI) and increased chromosomal aberrations were observed along with the successive increase of AgNPs concentration.
Conclusions
Therefore, the release of AgNPs into the environment must be prevented, so that it cannot harm plants and other beneficial microorganisms.
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Characterization of Streptomyces Isolates Associated with Estuarine Fish Chanos chanos and Profiling of Their Antibacterial Metabolites-Crude-Extract. Int J Microbiol 2020; 2020:8851947. [PMID: 33029146 PMCID: PMC7530512 DOI: 10.1155/2020/8851947] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 09/12/2020] [Indexed: 11/18/2022] Open
Abstract
Streptomyces has been reported as an essential producer of bioactive substances, including antibiotics and other types of antimicrobials. This study investigated antibacterial-producing Streptomyces isolated from the gut of estuarine fish Chanos chanos, emphasizing screening for the producer of peptide-containing antibacterial compounds. Eighteen isolates were found during preliminary screening, in which four isolates showed the best antibacterial activities. Based on the morphological, physiological, and biochemical characterization, as well as 16S rRNA partial sequencing, all of the four isolates belonged to Streptomyces. Three isolates were suspected as novel isolate candidates based on homology presentations and phylogenetic tree analysis. Disk-diffusion assay of the metabolite-crude-extract from the isolates showed broad-spectrum inhibitory activities against Staphylococcus aureus ATCC 25923, Bacillus cereus ATCC 10876, Escherichia coli ATCC 25922, and Pseudomonas aeruginosa InaCC B52 with minimum inhibitory concentration and minimum bactericidal concentration ranging from 2.5-10 mg/mL and 5-10 mg/mL, respectively. The highest antibacterial activity with low MIC and MBC values was shown by isolate AIA-10. Qualitative HPLC profiling revealed that the metabolic-crude-extracts showed many peaks with intensive area at 210 and 214 nm, especially from SCA-11 and AIA-10, indicating the presence of peptide groups in the structure of the constituent compound. The results also suggested that crude extracts SCA-11 and AIA-10 had higher hydrophobicity properties than the other extracts. Further characterization of the active compound was needed to find out which compounds were responsible for the antibacterial activity. The results of this study indicated that some Streptomyces isolated from new environmental niches, i.e., gut of estuarine fish Chanos chanos, produce promising peptide-containing bioactive compounds.
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Streptomyces-Derived Metabolites with Potential Photoprotective Properties-A Systematic Literature Review and Meta-Analysis on the Reported Chemodiversity. Molecules 2020; 25:molecules25143221. [PMID: 32679651 PMCID: PMC7397340 DOI: 10.3390/molecules25143221] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 07/01/2020] [Accepted: 07/07/2020] [Indexed: 02/07/2023] Open
Abstract
Sun overexposure is associated with the development of diseases that primarily affect the skin, which can lead to skin cancer. Among the main measures of photoprotection is the use of sunscreens. However, there is currently concern about the reported harmful effects to both humans and the environment due to several of the sunscreen ingredients available on the market. For this reason, the search for and development of new agents with photoprotective properties is required. In searching for these metabolites, researchers have turned their attention to microbial sources, especially the microbiota in unusual hostile environments. Among the diverse microorganisms available in nature, Actinobacteria and specifically Streptomyces, have been shown to be a source of metabolites with various biological activities of interest, such as antimicrobial, antitumor and immunomodulator activities. Herein, we present the results of a systematic review of the literature in which Streptomyces isolates were studied as a source of compounds with photoprotective properties. A meta-analysis of the structure-property and structure-activity relationships of those metabolites identified in the qualitative analysis phase was also carried out. These findings indicate that Streptomyces are a source of metabolites with potential applications in the development of new, safe and more eco-friendly sunscreens.
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Dutta J, Thakur D. Evaluation of Antagonistic and Plant Growth Promoting Potential of Streptomyces sp. TT3 Isolated from Tea (Camellia sinensis) Rhizosphere Soil. Curr Microbiol 2020; 77:1829-1838. [PMID: 32350603 DOI: 10.1007/s00284-020-02002-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 04/24/2020] [Indexed: 11/30/2022]
Abstract
The present study investigated the antagonistic and plant growth promoting (PGP) potential of actinobacteria TT3 isolated from tea rhizosphere soil of Tocklai tea germplasm preservation plot, Jorhat, Assam, India. It is a Gram-positive, filamentous with flexible spore chains actinobacteria. The 16S rRNA gene sequencing and phylogenetic analysis indicated that TT3 is closely related to genus Streptomyces for which it was referred to as Streptomyces sp. TT3. It showed very promising PGP traits such as phosphate solubilization, production of indole acetic acid (IAA), siderophore, and ammonia. Evaluation of ethyl acetate extract of TT3 exhibited broad spectrum antagonistic activity against various fungal pathogens. This antagonistic Streptomyces sp. TT3 showed positive for polyketide synthase type II (PKS-II) gene, which was predicted to be involved in the production of actinorhodin as a secondary metabolite pathway product using DoBISCUIT database. Further, the crude ethyl acetate extract of TT3 was analyzed by using GC-MS and revealed the presence of significant chemical constituents responsible for antimicrobial activity. Thus, the present study suggests that actinobacteria isolated from the rhizosphere soil may be explored for the production of bioactive compounds and use as a potential candidate for tea and other agricultural application.
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Affiliation(s)
- Jintu Dutta
- Microbial Biotechnology Laboratory, Life Sciences Division, Institute of Advanced Study in Science and Technology, Guwahati, Assam, India
| | - Debajit Thakur
- Microbial Biotechnology Laboratory, Life Sciences Division, Institute of Advanced Study in Science and Technology, Guwahati, Assam, India.
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30
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Arifiyanto A, Surtiningsih T, Ni'matuzahroh, Fatimah, Agustina D, Alami NH. Antimicrobial activity of biosurfactants produced by actinomycetes isolated from rhizosphere of Sidoarjo mud region. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2020. [DOI: 10.1016/j.bcab.2020.101513] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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31
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Nweze JA, Mbaoji FN, Huang G, Li Y, Yang L, Zhang Y, Huang S, Pan L, Yang D. Antibiotics Development and the Potentials of Marine-Derived Compounds to Stem the Tide of Multidrug-Resistant Pathogenic Bacteria, Fungi, and Protozoa. Mar Drugs 2020; 18:E145. [PMID: 32121196 PMCID: PMC7142797 DOI: 10.3390/md18030145] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 02/19/2020] [Accepted: 02/25/2020] [Indexed: 12/15/2022] Open
Abstract
As the search for new antibiotics continues, the resistance to known antimicrobial compounds continues to increase. Many researchers around the world, in response to antibiotics resistance, have continued to search for new antimicrobial compounds in different ecological niches such as the marine environment. Marine habitats are one of the known and promising sources for bioactive compounds with antimicrobial potentials against currently drug-resistant strains of pathogenic microorganisms. For more than a decade, numerous antimicrobial compounds have been discovered from marine environments, with many more antimicrobials still being discovered every year. So far, only very few compounds are in preclinical and clinical trials. Research in marine natural products has resulted in the isolation and identification of numerous diverse and novel chemical compounds with potency against even drug-resistant pathogens. Some of these compounds, which mainly came from marine bacteria and fungi, have been classified into alkaloids, lactones, phenols, quinones, tannins, terpenes, glycosides, halogenated, polyketides, xanthones, macrocycles, peptides, and fatty acids. All these are geared towards discovering and isolating unique compounds with therapeutic potential, especially against multidrug-resistant pathogenic microorganisms. In this review, we tried to summarize published articles from 2015 to 2019 on antimicrobial compounds isolated from marine sources, including some of their chemical structures and tests performed against drug-resistant pathogens.
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Affiliation(s)
- Justus Amuche Nweze
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, Guangxi Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning 530007, China; (J.A.N.); (F.N.M.); (S.H.)
- Department of Science Laboratory Technology, Faculty of Physical Sciences, University of Nigeria, Nsukka PMB 410001, Nigeria
| | - Florence N. Mbaoji
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, Guangxi Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning 530007, China; (J.A.N.); (F.N.M.); (S.H.)
- Department of Pharmacology and Toxicology, Faculty of Pharmaceutical Sciences, University of Nigeria, Nsukka PMB 410001, Enugu State, Nigeria
| | - Gang Huang
- Guangxi Biomass Industrialization Engineering Institute, National Engineering Research Center of Non-food Biorefinery, State Key Laboratory of Non-Food Biomass, Guangxi Academy of Sciences, Nanning 530007, China; (G.H.); (Y.L.); (L.Y.)
| | - Yanming Li
- Guangxi Biomass Industrialization Engineering Institute, National Engineering Research Center of Non-food Biorefinery, State Key Laboratory of Non-Food Biomass, Guangxi Academy of Sciences, Nanning 530007, China; (G.H.); (Y.L.); (L.Y.)
| | - Liyan Yang
- Guangxi Biomass Industrialization Engineering Institute, National Engineering Research Center of Non-food Biorefinery, State Key Laboratory of Non-Food Biomass, Guangxi Academy of Sciences, Nanning 530007, China; (G.H.); (Y.L.); (L.Y.)
| | - Yunkai Zhang
- College of Life Science and Technology of Guangxi University, Nanning 530004, China;
| | - Shushi Huang
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, Guangxi Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning 530007, China; (J.A.N.); (F.N.M.); (S.H.)
| | - Lixia Pan
- Guangxi Biomass Industrialization Engineering Institute, National Engineering Research Center of Non-food Biorefinery, State Key Laboratory of Non-Food Biomass, Guangxi Academy of Sciences, Nanning 530007, China; (G.H.); (Y.L.); (L.Y.)
| | - Dengfeng Yang
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, Guangxi Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning 530007, China; (J.A.N.); (F.N.M.); (S.H.)
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Insights on aquatic microbiome of the Indian Sundarbans mangrove areas. PLoS One 2020; 15:e0221543. [PMID: 32097429 PMCID: PMC7041844 DOI: 10.1371/journal.pone.0221543] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 02/04/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Anthropogenic perturbations have strong impact on water quality and ecological health of mangrove areas of Indian Sundarbans. Diversity in microbial community composition is important causes for maintaining the health of the mangrove ecosystem. However, microbial communities of estuarine water in Indian Sundarbans mangrove areas and environmental determinants that contribute to those communities were seldom studied. METHODS Nevertheless, this study attempted first to report bacterial and archaeal communities simultaneously in the water from Matla River and Thakuran River of Maipith coastal areas more accurately using 16S rRNA gene-based amplicon approaches. Attempt also been made to assess the capability of the environmental parameters for explaining the variation in microbial community composition. RESULTS Our investigation indicates the dominancy of halophilic marine bacteria from families Flavobacteriaceae and OM1 clade in the water with lower nutrient load collected from costal regions of a small Island of Sundarban Mangroves (ISM). At higher eutrophic conditions, changes in bacterial communities in Open Marine Water (OMW) were detected, where some of the marine hydrocarbons degrading bacteria under families Oceanospirillaceae and Spongiibacteraceae were dominated. While most abundant bacterial family Rhodobacteracea almost equally (18% of the total community) dominated in both sites. Minor variation in the composition of archaeal community was also observed between OMW and ISM. Redundancy analysis indicates a combination of total nitrogen and dissolved inorganic nutrients for OMW and for ISM, salinity and total nitrogen was responsible for explaining the changes in their respective microbial community composition. CONCLUSIONS Our study contributes the first conclusive overview on how do multiple environmental/anthropogenic stressors (salinity, pollution, eutrophication, land-use) affect the Sundarban estuary water and consequently the microbial communities in concert. However, systematic approaches with more samples for evaluating the effect of environmental pollutions on mangrove microbial communities are recommended.
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Siddharth S, Vittal RR, Wink J, Steinert M. Diversity and Bioactive Potential of Actinobacteria from Unexplored Regions of Western Ghats, India. Microorganisms 2020; 8:microorganisms8020225. [PMID: 32046111 PMCID: PMC7074718 DOI: 10.3390/microorganisms8020225] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 02/05/2020] [Accepted: 02/06/2020] [Indexed: 12/19/2022] Open
Abstract
The search for novel bioactive metabolites continues to be of much importance around the world for pharmaceutical, agricultural, and industrial applications. Actinobacteria constitute one of the extremely interesting groups of microorganisms widely used as important biological contributors for a wide range of novel secondary metabolites. This study focused on the assessment of antimicrobial and antioxidant activity of crude extracts of actinobacterial strains. Western Ghats of India represents unique regions of biologically diverse areas called “hot spots”. A total of 32 isolates were obtained from soil samples of different forest locations of Bisle Ghat and Virjapet situated in Western Ghats of Karnataka, India. The isolates were identified as species of Streptomyces, Nocardiopsis, and Nocardioides by cultural, morphological, and molecular studies. Based on preliminary screening, seven isolates were chosen for metabolites extraction and to determine antimicrobial activity qualitatively (disc diffusion method) and quantitatively (micro dilution method) and scavenging activity against DPPH (2,2-diphenyl-1-picrylhydrazyl) and ABTS (2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radicals. Crude extracts of all seven isolates exhibited fairly strong antibacterial activity towards MRSA strains (MRSA ATCC 33591, MRSA ATCC NR-46071, and MRSA ATCC 46171) with MIC varying from 15.62 to 125 μg/mL, whereas showed less inhibition potential towards Gram-negative bacteria Salmonella typhi (ATCC 25241) and Escherichia coli (ATCC 11775) with MIC of 125–500 μg/mL. The isolates namely S1A, SS5, SCA35, and SCA 11 inhibited Fusarium moniliforme (MTCC 6576) to a maximum extent with MIC ranging from 62.5 to 250 μg/mL. Crude extract of SCA 11 and SCA 13 exhibited potent scavenging activities against DPPH and ABTS radicals. The results from this study suggest that actinobacterial strains of Western Ghats are an excellent source of natural antimicrobial and antioxidant compounds. Further research investigations on purification, recovery, and structural characterization of the active compounds are to be carried out.
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Affiliation(s)
- Saket Siddharth
- Department of Studies in Microbiology, University of Mysore, Manasagangotri, Mysore 570 006, India;
| | - Ravishankar Rai Vittal
- Department of Studies in Microbiology, University of Mysore, Manasagangotri, Mysore 570 006, India;
- Correspondence:
| | - Joachim Wink
- Microbial Strain Collection, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany;
| | - Michael Steinert
- Institute of Microbiology, Technische Universität Braunschweig, 38106 Braunschweig, Germany;
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Tan LTH, Chan KG, Pusparajah P, Yin WF, Khan TM, Lee LH, Goh BH. Mangrove derived Streptomyces sp. MUM265 as a potential source of antioxidant and anticolon-cancer agents. BMC Microbiol 2019; 19:38. [PMID: 30760201 PMCID: PMC6375222 DOI: 10.1186/s12866-019-1409-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 01/31/2019] [Indexed: 01/11/2023] Open
Abstract
Background Colon cancer is the third most commonly diagnosed cancer worldwide, with a commensurately high mortality rate. The search for novel antioxidants and specific anticancer agents which may inhibit, delay or reverse the development of colon cancer is thus an area of great interest; Streptomyces bacteria have been demonstrated to be a source of such agents. Results The extract from Streptomyces sp. MUM265— a strain which was isolated and identified from Kuala Selangor mangrove forest, Selangor, Malaysia— was analyzed and found to exhibit antioxidant properties as demonstrated via metal-chelating ability as well as superoxide anion, DPPH and ABTS radical scavenging activities. This study also showed that MUM265 extract demonstrated cytotoxicity against colon cancer cells as evidenced by the reduced cell viability of Caco-2 cell line. Treatment with MUM265 extract induced depolarization of mitochondrial membrane potential and accumulation of subG1 cells in cell cycle analysis, suggesting that MUM265 exerted apoptosis-inducing effects on Caco-2 cells. Conclusion These findings indicate that mangrove derived Streptomyces sp. MUM265 represents a valuable bioresource of bioactive compounds for the future development of chemopreventive agents, with particular promise suggested for treatment of colon cancer. Electronic supplementary material The online version of this article (10.1186/s12866-019-1409-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Loh Teng-Hern Tan
- Institute of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China.,Biofunctional Molecule Exploratory (BMEX) Research Group, School of Pharmacy, Monash University Malaysia, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia.,Novel Bacteria and Drug Discovery (NBDD) Research Group, Microbiome and Bioresource Research Strength, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - Kok-Gan Chan
- International Genome Centre, Jiangsu University, Zhenjiang, China. .,Division of Genetics and Molecular Biology, Faculty of Science, Institute of Biological Sciences, University of Malaya, Kuala Lumpur, Malaysia.
| | - Priyia Pusparajah
- Medical Health and Translational Research Group, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - Wai-Fong Yin
- Division of Genetics and Molecular Biology, Faculty of Science, Institute of Biological Sciences, University of Malaya, Kuala Lumpur, Malaysia
| | - Tahir Mehmood Khan
- Institute of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China.,Biofunctional Molecule Exploratory (BMEX) Research Group, School of Pharmacy, Monash University Malaysia, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia.,Medical Health and Translational Research Group, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - Learn-Han Lee
- Novel Bacteria and Drug Discovery (NBDD) Research Group, Microbiome and Bioresource Research Strength, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia. .,Institute of Pharmaceutical Science, University of Veterinary and Animal Science, Lahore, Pakistan. .,Center of Health Outcomes Research and Therapeutic Safety (Cohorts), School of Pharmaceutical Sciences, University of Phayao, Phayao, Thailand.
| | - Bey-Hing Goh
- Biofunctional Molecule Exploratory (BMEX) Research Group, School of Pharmacy, Monash University Malaysia, 47500, Bandar Sunway, Selangor Darul Ehsan, Malaysia. .,Institute of Pharmaceutical Science, University of Veterinary and Animal Science, Lahore, Pakistan. .,Center of Health Outcomes Research and Therapeutic Safety (Cohorts), School of Pharmaceutical Sciences, University of Phayao, Phayao, Thailand.
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Bhattacharyya A, Haldar A, Bhattacharyya M, Ghosh A. Anthropogenic influence shapes the distribution of antibiotic resistant bacteria (ARB) in the sediment of Sundarban estuary in India. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 647:1626-1639. [PMID: 30180366 DOI: 10.1016/j.scitotenv.2018.08.038] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 08/02/2018] [Accepted: 08/03/2018] [Indexed: 06/08/2023]
Abstract
The abundance and dissemination of antibiotic resistance genes as emerging environmental contaminants have become a significant and growing threat to human and environmental health. Traditionally, investigations of antibiotic resistance have been confined to a subset of clinically relevant antibiotic-resistant bacterial pathogens. During the last decade it became evident that the environmental microbiota possesses an enormous number and diversity of antibiotic resistance genes, some of which are very similar to the genes circulating in pathogenic microbiota. Recent studies demonstrate that aquatic ecosystems are potential reservoirs of antibiotic-resistant bacteria (ARBs) and antibiotic resistance genes (ARGs). Therefore, these aquatic ecosystems serve as potential sources for their transmission of ARGs to human pathogens. An assessment of such risks requires a better understanding of the level and variability of the natural resistance background and the extent of the anthropogenic impact. We have analyzed eight sediment samples from Sundarban mangrove ecosystem in India, collected at sampling stations with different histories of anthropogenic influences, and analyzed the relative abundance of the blaTEM gene using quantitative real-time PCR. The blaTEM gene abundance strongly correlated with the respective anthropogenic influences (polyaromatic hydrocarbon, heavy metals etc.) of the sampling stations. Besides, 18 multidrug-resistant (ampicillin, kanamycin, vancomycin, and tetracycline resistant) bacterial strains (ARBs) were isolated and characterized. Moreover, the effect of different antibiotics on the biofilm forming ability of the isolates was evaluated quantitatively under a variety of experimental regimes. This is the first report of preservation and possible dissemination of ARGs in the mangrove ecosystem.
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Affiliation(s)
- Anish Bhattacharyya
- Department of Biochemistry, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, West Bengal 700019, India
| | - Anwesha Haldar
- Department of Geography, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, West Bengal 700019, India
| | - Maitree Bhattacharyya
- Department of Biochemistry, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, West Bengal 700019, India.
| | - Abhrajyoti Ghosh
- Department of Biochemistry, Bose Institute, P1/12, C. I. T. Road, Scheme VIIM, Kolkata, West Bengal 700054, India.
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Fischer G. Recent advances in 1,2,4-triazolo[1,5-a]pyrimidine chemistry. ADVANCES IN HETEROCYCLIC CHEMISTRY 2019. [DOI: 10.1016/bs.aihch.2018.10.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Antimicrobial activities of the Streptomyces ceolicolor strain AOB KF977550 isolated from a tropical estuary. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2018. [DOI: 10.1016/j.jtusci.2017.01.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Rajivgandhi G, Ramachandran G, Maruthupandy M, Vaseeharan B, Manoharan N. Molecular identification and structural characterization of marine endophytic actinomycetes Nocardiopsis sp. GRG 2 (KT 235641) and its antibacterial efficacy against isolated ESBL producing bacteria. Microb Pathog 2018; 126:138-148. [PMID: 30316902 DOI: 10.1016/j.micpath.2018.10.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 10/05/2018] [Accepted: 10/09/2018] [Indexed: 01/09/2023]
Abstract
The present study was designed to identify the potential bioactive compound from endophytic actinomycetes (EA) Nocardiopsis sp. GRG 2 (KT 235641) against selected extended spectrum beta lactamase (ESBL) producing Pseudomonas aeruginosa (P. aeruginosa) and Klebsiella pneumoniae (K. pneumoniae). Initially, the multi drug resistance (MDR) effect of selected uropathogens was confirmed by respective UTI panel of Hexa antibiotics disc methods. The zone of inhibition ≤22 mm for ceftazidime, ≤ 27 mm for cefotaxime and ≤8 mm zone of MIC stripe against both the uropathogens of phenotypic methods confirmed, the selected strains were ESBL producer. Among the various EA extracts, GRG 2 extract showed excellent antibacterial activity against both ESBL producing P. aeruginosa and K. pneumonia by agar well diffution method. The molecular identification of selected GRG 2 strain was named as Nocardiopsis sp. GRG 2 (KT235641). The antibacterial metabolites present in the TLC elution was exhibited at 274 nm by UV visible spectrometer. The partial purification of preparative HPLC fraction 3 showed 14, 16 mm against P. aeruginosa and K. pneumoniae, respectively. Based on the antibacterial effect, the FT-IR, GC-MS and LC-MS analysis of fraction 3 was confirmed as 1, 4-diaza-2, 5-dioxo-3-isobutyl bicyclo[4.3.0]nonane (DDIBN). Further, the dose dependent inhibition of DDIBN against both ESBL producing pathogens was observed at 75 μg/mL by minimum inhibition concentration (MIC) and minimum bactericidal concentration (MBC). The increased cell death and disrupted cell membrane integrity were observed at MIC of DDIBN by confocal laser scanning electron microscope (CLSM) and scanning electron microscope (SEM). The results were proved that the DDIBN has potential antibacterial metabolites against ESBL producing pathogens and it can be applied for various other biomedical fields.
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Affiliation(s)
- Govindan Rajivgandhi
- Medical Microbiology and Marine Pharmacology Laboratory, Department of Marine Science, Bharathidasan University, Tiruchirappalli-24, Tamilnadu, India
| | - Govindan Ramachandran
- Medical Microbiology and Marine Pharmacology Laboratory, Department of Marine Science, Bharathidasan University, Tiruchirappalli-24, Tamilnadu, India
| | - Muthuchamy Maruthupandy
- Laboratorio de Nanocelulosa y Biomateriales, Departamento de Ingeniería Química, Biotecnología y Materiales, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Avenida Beauchef 851, Santiago, Chile
| | - Baskaralingam Vaseeharan
- Department of Animal Health and Management, Alagappa University, Karaikudi-03, Tamil Nadu, India
| | - Natesan Manoharan
- Medical Microbiology and Marine Pharmacology Laboratory, Department of Marine Science, Bharathidasan University, Tiruchirappalli-24, Tamilnadu, India.
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Characterisation and identification of antibacterial compound from marine actinobacteria: In vitro and in silico analysis. J Infect Public Health 2018; 12:83-89. [PMID: 30270149 DOI: 10.1016/j.jiph.2018.09.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 08/27/2018] [Accepted: 09/16/2018] [Indexed: 11/20/2022] Open
Abstract
OBJECTIVE The present study was focused on the characterization and in silico analysis of antibacterial compound derived from marine actinobacteria isolated from the sediments of salterns of Ongole, Andhra Pradesh, India. METHODS The sediment sample was serially diluted and marine actinobacteria were isolated in actinomycetes isolation agar. A total of 9 colonies were recovered and among them, 5 morphologically distinct isolates were selected for further processing. The antibacterial activity of these five isolates was tested against 4 clinical isolates collected from Narayani Hospital, Vellore, Tamil Nadu. RESULTS The isolate SJP4 showed inhibitory activity against all the test pathogens viz., Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa and Bacillus cereus. The structure of the compounds extracted from SJP4 was identified as 8-diaza-2,9-dibenzoyl-5,6-diphenyl-2,8-decadienedioic acid diethyl ester and [1,2,4]triazol-1-ylethanone through GCMS analysis. Molecular docking studies was done using Autodock software. These two compounds were docked into the binding site of DNA gyrase and found to have binding energy of -6.55(Kcal/mol) and -4.86(Kcal/mol) respectively. The potential actinobacteria isolate was identified as Nocardiopsis dassonvillei SJPB4 strain (Accession no. MG434671) using 16s rRNA sequencing. CONCLUSION We are concluding that as the compounds were successfully docked on to the active site of DNA gyrase.
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Fatahi-Bafghi M, Rasouli-nasab M, Yasliani-Fard S, Habibnia S, Gharehbaghi F, Eshraghi SS, Kabir K, Heidarieh P. Diversity and Antimicrobial Activity of Actinomycetes Isolated from Lut Desert: The Extremely Arid Climatic Zones of Iran. Int J Pept Res Ther 2018. [DOI: 10.1007/s10989-018-9767-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Elhagrassy AF. Isolation and characterization of actinomycetes from Mural paintings of Snu- Sert-Ankh tomb, their antimicrobial activity, and their biodeterioration. Microbiol Res 2018; 216:47-55. [PMID: 30269856 DOI: 10.1016/j.micres.2018.08.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 08/02/2018] [Accepted: 08/10/2018] [Indexed: 11/18/2022]
Abstract
A total of 35 actinomycetes were isolated from the surface of mural paintings of snu- sort- ankh in El Leasht, Egypt during four seasons all over 2016-2017. In 2009 this tomb was deteriorated by "Aspergillus niger, A. flavus, Fusarium moniliforme, Alternaria alternate, Rhizopus stolonifera, Bacillus subtilis, Bacillus cereus, and micrococcus iuteus." In 2017 the isolation of swabs presents only Aspergillus niger and about 35 actinomycetes classified to three different groups "Streptomyces, Nocardia, and Micromonospora" only five species belong to Streptomyces group showed antimicrobial activity against the previous microorganisms. These actinomycetes were identified according to their sequences in the GenBank to "Streptomyces spectabilis, S. alborgriseolus, S. globsus, S. corchorstt, S. ambofactens." In the other hand, the pigments of the wall paintings of the tomb (Egyptian blue, Egyptian green, Goethite) that analyzed by SEM-EDX, FTIR were measured by the spectrophotometer in both 2009 and 2017. The results showed that the actinomycetes could produce extracellular pigments causing a color change of archaeological pigments otherwise it helps in inhibition the growth of the previous microorganisms found in 2009. The optimization factors for increasing the antibiotic production of the Streptomyces were 3% NaCl and temperature between 30:35°c in Alkin pH (pH = 7.5).
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Affiliation(s)
- Abeer F Elhagrassy
- Lecturer of Mural paintings and microbiology, Conservation Department, Faculty of Archaeology, Fayoum University, Egypt.
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Synthesis of bioactive compounds from vermicast isolated actinomycetes species and its antimicrobial activity against human pathogenic bacteria. Microb Pathog 2018; 121:155-165. [DOI: 10.1016/j.micpath.2018.05.027] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 05/15/2018] [Accepted: 05/16/2018] [Indexed: 11/22/2022]
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Draft Genome Sequence of Bioactive Strain Streptomyces sp. SMS_SU21, Isolated from Soil Sediment of the Sundarbans Mangrove Ecosystem. GENOME ANNOUNCEMENTS 2018; 6:6/27/e00614-18. [PMID: 29976609 PMCID: PMC6033983 DOI: 10.1128/genomea.00614-18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Streptomyces sp. SMS_SU21 possesses strong antimicrobial activity and antioxidant potential. This strain was isolated from the Sundarbans mangrove ecosystem, and its draft genome comprises 7,449,420 bp with 6,680 open reading frames. Genome analysis of strain SMS_SU21 provides insight into its secondary metabolite arsenal and reveals the gene clusters putatively responsible for its bioactive potential.
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Quintero M, Velásquez A, Jutinico LM, Jiménez-Vergara E, Blandón LM, Martinez K, Lee HS, Gómez-León J. Bioprospecting from marine coastal sediments of Colombian Caribbean: screening and study of antimicrobial activity. J Appl Microbiol 2018; 125:753-765. [PMID: 29791769 DOI: 10.1111/jam.13926] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 04/25/2018] [Accepted: 05/12/2018] [Indexed: 11/28/2022]
Abstract
AIMS To isolate micro-organisms associated with marine coastal sediments of Colombian Caribbean Sea and for evaluating its antimicrobial activity in order to identify the most active strains. METHODS AND RESULTS One hundred and four strains were isolated from sediment samples of the Colombian Caribbean Sea. First at all, an antimicrobial activity screening was made using agar well diffusion method against the pathogens: Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, Candida albicans, Candida tropicalis and Pseudomonas aeruginosa. Seventeen strains showed strong antimicrobial activity and were identified as members of the Streptomyces, Micrococcus and Bacillus genera. Organic extracts were produced by liquid-liquid extraction and HPLC profiles of the most active extracts were obtained. Then, the antimicrobial activity of the extracts was evaluated with the broth microdilution test, finding antimicrobial activities superior to 90% against S. aureus MRSA and C. albicans. HPLC profiles indicated the presence of different antimicrobial compounds. CONCLUSION This study demonstrates that the microorganisms isolated from the Colombian Caribbean Sea are possible sources of antimicrobial compounds against pathogenic strains. SIGNIFICANCE AND IMPACT OF STUDY These results contribute to the knowledge of the biotechnological potential of the Colombian biodiversity for the development of pharmaceutical products that can counteract the increasing problem of pathogen resistance.
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Affiliation(s)
- M Quintero
- Marine and Coastal Research Institute "José Benito Vives de Andréis"- INVEMAR, Santa Marta D.T.C.H., Colombia
| | - A Velásquez
- Marine and Coastal Research Institute "José Benito Vives de Andréis"- INVEMAR, Santa Marta D.T.C.H., Colombia
| | - L M Jutinico
- Marine and Coastal Research Institute "José Benito Vives de Andréis"- INVEMAR, Santa Marta D.T.C.H., Colombia
| | - E Jiménez-Vergara
- Marine and Coastal Research Institute "José Benito Vives de Andréis"- INVEMAR, Santa Marta D.T.C.H., Colombia
| | - L M Blandón
- Marine and Coastal Research Institute "José Benito Vives de Andréis"- INVEMAR, Santa Marta D.T.C.H., Colombia
| | - K Martinez
- Marine and Coastal Research Institute "José Benito Vives de Andréis"- INVEMAR, Santa Marta D.T.C.H., Colombia
| | - H S Lee
- Korea Institute of Ocean Science & Technology, Marine Biotechnology Research, Ansan, Korea
| | - J Gómez-León
- Marine and Coastal Research Institute "José Benito Vives de Andréis"- INVEMAR, Santa Marta D.T.C.H., Colombia
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Palla MS, Guntuku GS, Muthyala MKK, Pingali S, Sahu PK. Isolation and molecular characterization of antifungal metabolite producing actinomycete from mangrove soil. BENI-SUEF UNIVERSITY JOURNAL OF BASIC AND APPLIED SCIENCES 2018. [DOI: 10.1016/j.bjbas.2018.02.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Zothanpuia, Passari AK, Leo VV, Chandra P, Kumar B, Nayak C, Hashem A, Abd Allah EF, Alqarawi AA, Singh BP. Bioprospection of actinobacteria derived from freshwater sediments for their potential to produce antimicrobial compounds. Microb Cell Fact 2018; 17:68. [PMID: 29729667 PMCID: PMC5935920 DOI: 10.1186/s12934-018-0912-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Accepted: 04/24/2018] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Actinobacteria from freshwater habitats have been explored less than from other habitats in the search for compounds of pharmaceutical value. This study highlighted the abundance of actinobacteria from freshwater sediments of two rivers and one lake, and the isolates were studied for their ability to produce antimicrobial bioactive compounds. RESULTS 16S rRNA gene sequencing led to the identification of 84 actinobacterial isolates separated into a common genus (Streptomyces) and eight rare genera (Nocardiopsis, Saccharopolyspora, Rhodococcus, Prauserella, Amycolatopsis, Promicromonospora, Kocuria and Micrococcus). All strains that showed significant inhibition potentials were found against Gram-positive, Gram-negative and yeast pathogens. Further, three biosynthetic genes, polyketide synthases type II (PKS II), nonribosomal peptide synthetases (NRPS) and aminodeoxyisochorismate synthase (phzE), were detected in 38, 71 and 29% of the strains, respectively. Six isolates based on their antimicrobial potentials were selected for the detection and quantification of standard antibiotics using ultra performance liquid chromatography (UPLC-ESI-MS/MS) and volatile organic compounds (VOCs) using gas chromatography mass spectrometry (GC/MS). Four antibiotics (fluconazole, trimethoprim, ketoconazole and rifampicin) and 35 VOCs were quantified and determined from the methanolic crude extract of six selected Streptomyces strains. CONCLUSION Infectious diseases still remain one of the leading causes of death globally and bacterial infections caused millions of deaths annually. Culturable actinobacteria associated with freshwater lake and river sediments has the prospects for the production of bioactive secondary metabolites.
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Affiliation(s)
- Zothanpuia
- Molecular Microbiology and Systematics Laboratory, Department of Biotechnology, Mizoram University, Aizawl, Mizoram, 796004, India
| | - Ajit Kumar Passari
- Molecular Microbiology and Systematics Laboratory, Department of Biotechnology, Mizoram University, Aizawl, Mizoram, 796004, India
| | - Vincent Vineeth Leo
- Molecular Microbiology and Systematics Laboratory, Department of Biotechnology, Mizoram University, Aizawl, Mizoram, 796004, India
| | - Preeti Chandra
- SAIF, CSIR-Central Drug Research Institute (CSIR-CDRI), Lucknow, 226012, India
| | - Brijesh Kumar
- SAIF, CSIR-Central Drug Research Institute (CSIR-CDRI), Lucknow, 226012, India
| | | | - Abeer Hashem
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box. 2460, Riyadh, 11451, Saudi Arabia
- Mycology and Plant Disease Survey Department, Plant Pathology Research Institute, ARC, Giza, 12511, Egypt
| | - Elsayed Fathi Abd Allah
- Department of Plant Production, Faculty of Food & Agricultural Sciences, P.O. Box. 2460, Riyadh, 11451, Saudi Arabia
| | - Abdulaziz A Alqarawi
- Department of Plant Production, Faculty of Food & Agricultural Sciences, P.O. Box. 2460, Riyadh, 11451, Saudi Arabia
| | - Bhim Pratap Singh
- Molecular Microbiology and Systematics Laboratory, Department of Biotechnology, Mizoram University, Aizawl, Mizoram, 796004, India.
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Masand M, Sivakala KK, Menghani E, Thinesh T, Anandham R, Sharma G, Sivakumar N, Jebakumar SRD, Jose PA. Biosynthetic Potential of Bioactive Streptomycetes Isolated From Arid Region of the Thar Desert, Rajasthan (India). Front Microbiol 2018; 9:687. [PMID: 29720968 PMCID: PMC5915549 DOI: 10.3389/fmicb.2018.00687] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 03/23/2018] [Indexed: 12/19/2022] Open
Abstract
Acquisition of Actinobacteria, especially Streptomyces from previously underexplored habitats and the exploration of their biosynthetic potential have gained much attention in the rejuvenated antibiotics search programs. Herein, we isolated some Streptomyces strains, from an arid region of the Great Indian Thar Desert, which possess an ability to produce novel bioactive compounds. Twenty-one morphologically distinctive strains differing in their aerial and substrate mycelium were isolated by employing a stamping method. Among them, 12 strains were identified by a two-level antimicrobial screening method, exerting antimicrobial effects against a panel of indicator strains including methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus species. Based on their potent antimicrobial activity, four isolates were further explored by 16S rRNA gene-based identification, genetic screening, and metabolomic analysis; and it was found that these strains belong to the genus Streptomyces. The selected strains were found to have polyketide synthase and non-ribosomal peptide synthetase systems. In addition, extracellular metabolomic screening revealed that the isolates produced analogs of doxorubicinol, pyrromycin, erythromycin, and 6-13 other putative novel metabolites. These results demonstrate the significance of Streptomyces inhabiting the arid region of Thar Desert, suggesting that similar arid environments can be considered as the reservoirs of novel Streptomyces strains that could have biotechnological significance.
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Affiliation(s)
- Meeta Masand
- School of Life Sciences, Suresh Gyan Vihar University, Jaipur, India
| | | | - Ekta Menghani
- Department of Biotechnology, School of Sciences, JECRC University, Jaipur, India
| | - Thangathurai Thinesh
- Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, India
| | - Rangasamy Anandham
- Department of Agricultural Microbiology, Agricultural College and Research Institute, Tamil Nadu Agricultural University, Madurai, India
| | - Gaurav Sharma
- School of Life Sciences, Suresh Gyan Vihar University, Jaipur, India
| | - Natesan Sivakumar
- Department of Molecular Microbiology, School of Biotechnology, Madurai Kamaraj University, Madurai, India
| | - Solomon R D Jebakumar
- Department of Molecular Microbiology, School of Biotechnology, Madurai Kamaraj University, Madurai, India
| | - Polpass Arul Jose
- Department of Molecular Microbiology, School of Biotechnology, Madurai Kamaraj University, Madurai, India
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Indupalli M, Muvva V, Mangamuri U, Munaganti RK, Naragani K. Bioactive compounds from mangrove derived rare actinobacterium Saccharomonospora oceani VJDS-3. 3 Biotech 2018; 8:103. [PMID: 29430365 PMCID: PMC5796933 DOI: 10.1007/s13205-018-1093-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 01/04/2018] [Indexed: 12/20/2022] Open
Abstract
A rare actinobacterium was isolated from Nizampatnam mangrove ecosystem of Andhra Pradesh, India, and was screened for its ability to produce bioactive compounds. The potential strain was identified as Saccharomonospora oceani VJDS-3 by polyphasic taxonomy. Purification of the biologically active compounds by column chromatography led to the isolation of three compounds, namely methoxy ethyl cinnamate (ethyl(E)-3-(4-methoxyphenyl)acrylate) (R1), 4-hydroxy methyl cinnamate (methyl(E)-3-(4-hydroxyphenyl)acrylate) (R2) and 4-methylbenzoic acid (R3). The structure of the compounds was elucidated on the basis of spectroscopic analysis including FTIR, EIMS, 1HNMR and 13CNMR spectroscopies. The antimicrobial activity of the bioactive compounds produced by the strain was tested against a panel of bacteria and fungi, and expressed in terms of minimum inhibitory concentration. Compound (R1) exhibited higher antimicrobial potential (50 µg/ml) against Staphylococcus aureus, Bacillus megaterium and Candida albicans compared to R2 and R3. Antioxidant activity of compounds was determined by DPPH and ABTS radical scavenging activities. The results revealed that compound R3 effectively scavenged DPPH (73.08 ± 1.29) and ABTS (99.74 ± 0.00) radicals at a concentration of 25 and 50 µg/ml, respectively. Antidiabetic and anti-obesity activities were evaluated by inhibitory potential of compounds against alpha-glucosidase, alpha-amylase and pancreatic lipase by spectrophotometric assays. Compound R1 showed effective inhibition against alpha-glucosidase (66.8 ± 1.2) at 20 µg/ml while moderate to weak activities were found against alpha-amylase and pancreatic lipase. To the best of our knowledge, this is the first report on the isolation of supra said compounds from the genus Saccharomonospora.
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Affiliation(s)
- Manideepa Indupalli
- Department of Botany and Microbiology, Acharya Nagarjuna University, Nagarjunanagar, Guntur, Andhra Pradesh 522510 India
| | - Vijayalakshmi Muvva
- Department of Botany and Microbiology, Acharya Nagarjuna University, Nagarjunanagar, Guntur, Andhra Pradesh 522510 India
| | - Ushakiranmayi Mangamuri
- Department of Botany and Microbiology, Acharya Nagarjuna University, Nagarjunanagar, Guntur, Andhra Pradesh 522510 India
| | - Rajesh Kumar Munaganti
- Department of Botany and Microbiology, Acharya Nagarjuna University, Nagarjunanagar, Guntur, Andhra Pradesh 522510 India
| | - Krishna Naragani
- Department of Botany and Microbiology, Acharya Nagarjuna University, Nagarjunanagar, Guntur, Andhra Pradesh 522510 India
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Gong B, Chen S, Lan W, Huang Y, Zhu X. Antibacterial and Antitumor Potential of Actinomycetes Isolated from Mangrove Soil in the Maowei Sea of the Southern Coast of China. IRANIAN JOURNAL OF PHARMACEUTICAL RESEARCH : IJPR 2018; 17:1339-1346. [PMID: 30568692 PMCID: PMC6269563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/29/2022]
Abstract
Mangroves are the tidal forest existing in the intertidal zone and usually considered as the special marine ecosystem. In the present study, 452 actinomycetes were recovered from nine diferent sites at Maowei Sea Mangrove Reserve in Qinzhou (Guangxi province, China). Among them, Seventy-four strains were purified for 16s RNA gene sequencing and further characterization. The results indicated that the majority of isolates belonged to the genera Streptomyces, including 17 species. Streptomyces sanyensis was the dominant species (31.1%), followed by Streptomyces griseorubens (17.5%), Streptomyces viridobrunneus (10.8%) and other Streptomyces species. Only one rare actinomycete, Stenotrophomonas was discovered. The isolation of actinomycetes was obviously related to the type of soil and edaphic conditions. Rhizosphere-associated soils gave almost 62.2% actinomycete isolates, nearly twice as many as the non-rhizosphere-associated soils. In addition, 20 actinomycete strains (27%) presented varied antibacterial activities towards four tested organisms, including two drug-resistant clinical strains (MRSA and VRE), while some species of Streptomyces like S.sanyensis, S.viridobrunneus, S.tanashiensis, S.parvus, S.flavotricini, and S.parvulus exhibited remarkable cytotoxic activities. Further bioinformatical analysis of these 29 bioactive strains for secondary metabolites biosynthetic machineries revealed that nonribosomal peptide synthetase (NRPS) was detected in 20 isolates (68.9%), whereas type-I polyketide synthase (PKS-I) and type-II polyketide synthase (PKS-II) were detected in 16 and all of the 29 strains, respectively. Hence, our work demonstrated that actinomycetes from mangroves in Maowei Sea Mangrove Reservewere fascinating reservoirs for antibacterial and antitumor natural products discovery.
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Affiliation(s)
- Bin Gong
- Guangxi KeyLaboratory of Beibu Gulf Marine Biodiversity Conservation, Ocean Science department, Qinzhou University, Qinzhou, China. ,Corresponding author: E-mail:
| | - Shuang Chen
- College of Chemistry and Materials Science, Guangxi Teachers Education University, Nanning, China.
| | - Wenwen Lan
- Guangxi KeyLaboratory of Beibu Gulf Marine Biodiversity Conservation, Ocean Science department, Qinzhou University, Qinzhou, China.
| | - Yanmin Huang
- College of Chemistry and Materials Science, Guangxi Teachers Education University, Nanning, China.
| | - Xiangcheng Zhu
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, China.
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Nag S, Pramanik A, Chattopadhyay D, Bhattacharyya M. Green-fabrication of gold nanomaterials using Staphylococcus warneri from Sundarbans estuary: an effective recyclable nanocatalyst for degrading nitro aromatic pollutants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:2331-2349. [PMID: 29124636 DOI: 10.1007/s11356-017-0617-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Accepted: 10/24/2017] [Indexed: 06/07/2023]
Abstract
Microbial synthesis of gold nanoparticles (GNPs) has attracted considerable attention in recent times due to their exceptional capability for the bioremediation of industrial wastes and also for the treatment of wastewater. A bacterial strain Staphylococcus warneri, isolated from the estuarine mangroves of Sundarbans region produced highly stable GNPs by reducing hydrogen auric chloride (HAucl4) salt using intracellular protein extract. The nanoparticles were characterized utilizing ultraviolet-visible spectrophotometry, transmission electron microscopy, scanning electron microscopy, atomic force microscopy, X-ray diffraction, and surface enhanced Raman scattering. Highly dispersed, spherically shaped GNPs varied around 15-25 nm in size and were highly crystalline with face-centered cubic structures. Recyclable catalytic activity of as-synthesized GNPs was evidenced by complete degradation of nitro aromatic pollutants like 2-nitroaniline, 4-nitroaniline, 2-nitrophenol and 4-nitrophenol. Our GNPs show excellent and efficient catalytic activity with significantly high rate constant (10-1 order) and high turnover frequency (103 order) in recyclable manner up to three times. To our knowledge, this is the first report of Staphylococcus warneri in the production of gold nanoparticles. This green technology for bioremediation of toxic nitro aromatic pollutants is safe and economically beneficial to challenge the development and sustainability issue.
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Affiliation(s)
- Sudip Nag
- Department of Biochemistry, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, West Bengal, 700019, India
| | - Arnab Pramanik
- Department of Biochemistry, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, West Bengal, 700019, India
| | - Dhrubajyoti Chattopadhyay
- Amity University, Major Arterial Road, Action Area II, Rajarhat, Newtown, Kolkata, West Bengal, 700156, India
| | - Maitree Bhattacharyya
- Department of Biochemistry, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, West Bengal, 700019, India.
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