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Abo El-Ela FI, Hassan WH, Amer AM, El-Dek SI. Antifungal Activity of Chitosan Polymeric Nanoparticles and Correlation with Their pH Against Mucor circinelloides Causing Mucormycosis, Along with Penicillium notatum and Aspergillus Species. Curr Microbiol 2023; 81:47. [PMID: 38135799 PMCID: PMC10746780 DOI: 10.1007/s00284-023-03555-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 11/10/2023] [Indexed: 12/24/2023]
Abstract
Mucormycosis is uncommon, yet it is more prevalent among individuals with underlying health conditions and those who are immunocompromised. Chitosan is studied because of its appealing properties and diverse applications. The purpose of this work is to synthesize chitosan nanoparticles (CSNPs) by ionic gelation method at various pH levels and test them against Mucor and other filamentous fungus. Field Emission Scanning Electron Microscope, Zeta sizer, Zeta potential, and Fourier Transformed Infrared Spectroscopy were used to characterize CSNPs. Hydrodynamic size increased considerably with increasing pH. Our CSNPs were tested against fungal isolates of Aspergillus Flavus RCMB 02783, Aspergillus Fumigatus RCMB 02564, and Aspergillus Niger RCMB 02588, Penicillium Notatum (NCPF 2881) and (M. circinelloides CNRMA 03.894) causing mucromycosis. Antifungal activity was investigated using Minimum inhibitory concentration (MIC), Minimum Fungicidal concentration (MFC), Disc diffusion assay, and Antifungal inhibitory percentages methods. The best antifungal efficacy results were obtained through CSNPs prepared at pH = 4.4 at very low concentration for MIC (1.03 or 2.75 μg/mL) with 100% M. circinelloides inhibition followed by pH = 4.6 with MIC (73 or 208 μg/mL) and 93% M. cirecinelloides inhibition %. Future usage of these materials in masks or wound dressing to avoid fungal infections, including mucormycosis following COVID-19, penicillium, and aspergillosis toxicity and infections.
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Affiliation(s)
- Fatma I Abo El-Ela
- Department of Pharmacology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, 62511, Egypt.
| | - Walid Hamdy Hassan
- Department of Microbiology, Mycology and Immunology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Alaa M Amer
- Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - S I El-Dek
- Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef, 62511, Egypt
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Fanele A, Ndlovu SI. Endophytic fungal species Nigrospora oryzae and Alternaria alternata exhibit antimicrobial activity against gram-positive and gram-negative multi-drug resistant clinical bacterial isolates. BMC Complement Med Ther 2023; 23:323. [PMID: 37715184 PMCID: PMC10504728 DOI: 10.1186/s12906-023-04157-8] [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: 10/26/2022] [Accepted: 09/07/2023] [Indexed: 09/17/2023] Open
Abstract
BACKGROUND The emergence of multidrug-resistant pathogens and the lack of new antimicrobial drugs is a major public health concern that needs urgent and innovative solutions. Endophytic fungi living in unique niches such as in endosymbiosis with plants are increasingly drawing attention as alternative sources of novel and chemically diverse compounds with unique mechanisms of action. METHODS In the present study, ten endophytic fungi isolated from the medicinal plant, Sclerocarya birrea were screened for bioactivity against a panel of indicator bacteria. Three bioactive endophytic fungi (strains P02PL2, P02MS1, and P02MS2A) were selected and identified through ITS-rDNA sequencing. The whole broth extracts of the three selected isolates were further screened against contemporary drug-resistant bacterial pathogens. This was followed by partial purification by solid phase extraction and GC-MS analysis of bioactive fractions. RESULTS The bioactive endophytic fungi were identified as Alternaria alternata species (strains P02PL2 and P02MS1) and Nigrospora oryzae (strain P02MS2A). The whole broth extracts from N. oryzae P02MS2A exhibited a MIC of one μg/mL and 16 μg/mL against gram-negative, MDR Pseudomonas 5625574 and gram-positive MRSA 25775 clinical isolates, respectively. After partial purification and GC-MS analysis of whole broth extract from A. alternaria PO2MS1, 2-fluorobenzoic acid heptadecyl was putatively identified as the active compound in fraction C of this extract. This compound was also putatively identified in fraction E of A. alternata P02PL2, fraction B of A. alternata P02MS1 and fraction B of N. oryzae P02MS2A, and interestingly, all these fractions retained activity against the two MDR clinical isolates. CONCLUSION The putative identification of 2-fluorobenzoic acid heptadecyl compound showing a broad-spectrum of activity, more especially against gram-negative MDR contemporary pathogens is highly encouraging in the initiative at developing novel drugs to combat multi-drug resistance.
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Affiliation(s)
- Asiphe Fanele
- Discipline of Medical Microbiology, School of Laboratory Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Sizwe I Ndlovu
- Department of Biotechnology and Food Technology, Doornfontein Campus, University of Johannesburg, Johannesburg, South Africa.
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Nutraceutical Enrichment of Animal Feed by Filamentous Fungi Fermentation. FERMENTATION 2022. [DOI: 10.3390/fermentation8080402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
There is an urgent need for improvements in animal production, particularly for ruminants, such that more sustainable and efficient processes are developed for obtaining more nutritious and efficient feeds. Filamentous fungi can add value to residual plant biomass, and may also have the potential to produce metabolites and enrich plant biomasses used in animal nutrition, converting them into nutraceutical sources. Thus, in this work, filamentous fungal fermentation of ruminant feed biomasses commonly used in Brazil was performed, and the enrichment for bioactive metabolites was tested. For this, Fistulina hepatica, Ganoderma lucidum, Pleurotus pulmonarius, Panus lecomtei, and Aspergillus terreus were grown for 28 days on different substrates: starchy grains- (sorghum, oat, and corn), fibrous substrates (coast-cross, rice husk, and moringa plant) and protein-rich substrates (cottonseed cake and pigeon pea plant). Fermented substrates were evaluated for laccase activity, crude protein, β-glucan, and lovastatin content. The highest growth rate was observed for G. lucidum in oat substrate (OT-01) (0.708 ± 0.035 cm/day) and F. hepatica in oat + coast-cross + pigeon pea treatment (OT-10) (0.607 ± 0.012 cm/day). High laccase activity was observed for P. lecomtei grown in starchy grain + moringa + pigeon pea substrate, reaching an activity of 416.8 ± 20.28 U/g. A. terreus growth in ST-09 (sorghum + pigeon pea) showed higher protein (15.3 ± 0.46%), β-glucan (503.56 ± 8.6 mg/g) and lovastatin (1.10 ± 0.17 mg/g) content compared to untreated substrates. These results demonstrate that filamentous fungi are an alternative for nutraceutical enrichment of ruminant feed biomasses. To the best of our knowledge, this is the first report in which P. lecomtei and F. hepatica are evaluated for their ability to be cultivated in ruminant feed substrates from Brazil.
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Membrane based separation and purification of fusarubins from Fusarium solani. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Kristensen SB, Pedersen TB, Nielsen MR, Wimmer R, Muff J, Sørensen JL. Production and Selectivity of Key Fusarubins from Fusarium solani due to Media Composition. Toxins (Basel) 2021; 13:376. [PMID: 34070644 PMCID: PMC8230112 DOI: 10.3390/toxins13060376] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/18/2021] [Accepted: 05/22/2021] [Indexed: 11/21/2022] Open
Abstract
Natural products display a large structural variation and different uses within a broad spectrum of industries. In this study, we investigate the influence of carbohydrates and nitrogen sources on the production and selectivity of production of four different polyketides produced by Fusarium solani, fusarubin, javanicin, bostrycoidin and anhydrofusarubin. We introduce four different carbohydrates and two types of nitrogen sources. Hereafter, a full factorial design was applied using combinations of three levels of sucrose and three levels of the two types of nitrogen. Each combination displayed different selectivity and production yields for all the compounds of interest. Response surface design was utilized to investigate possible maximum yields for the surrounding combinations of media. It was also shown that the maximum yields were not always the ones illustrating high selectivity, which is an important factor for making purification steps easier. We visualized the production over time for one of the media types, illustrating high yields and selectivity.
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Affiliation(s)
- Sebastian Birkedal Kristensen
- Department of Chemistry and Bioscience, Aalborg University, 6700 Esbjerg, Denmark; (S.B.K.); (T.B.P.); (M.R.N.); (J.M.)
| | - Tobias Bruun Pedersen
- Department of Chemistry and Bioscience, Aalborg University, 6700 Esbjerg, Denmark; (S.B.K.); (T.B.P.); (M.R.N.); (J.M.)
| | - Mikkel Rank Nielsen
- Department of Chemistry and Bioscience, Aalborg University, 6700 Esbjerg, Denmark; (S.B.K.); (T.B.P.); (M.R.N.); (J.M.)
| | - Reinhard Wimmer
- Department of Chemistry and Bioscience, Aalborg University, 9220 Aalborg, Denmark;
| | - Jens Muff
- Department of Chemistry and Bioscience, Aalborg University, 6700 Esbjerg, Denmark; (S.B.K.); (T.B.P.); (M.R.N.); (J.M.)
| | - Jens Laurids Sørensen
- Department of Chemistry and Bioscience, Aalborg University, 6700 Esbjerg, Denmark; (S.B.K.); (T.B.P.); (M.R.N.); (J.M.)
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Al-Saman MA, Helmy MA, Abdella A, Wilkins MR, El Khalik Gobba NA, Mahrous H. Optimization of lovastatin production by Aspergillus terreus ATCC 10020 using solid-state fermentation and its pharmacological applications. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2021. [DOI: 10.1016/j.bcab.2021.101906] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Corrêa CL, Midorikawa GEO, Filho EXF, Noronha EF, Alves GSC, Togawa RC, Silva-Junior OB, Costa MMDC, Grynberg P, Miller RNG. Transcriptome Profiling-Based Analysis of Carbohydrate-Active Enzymes in Aspergillus terreus Involved in Plant Biomass Degradation. Front Bioeng Biotechnol 2020; 8:564527. [PMID: 33123513 PMCID: PMC7573219 DOI: 10.3389/fbioe.2020.564527] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Accepted: 09/16/2020] [Indexed: 11/13/2022] Open
Abstract
Given the global abundance of plant biomass residues, potential exists in biorefinery-based applications with lignocellulolytic fungi. Frequently isolated from agricultural cellulosic materials, Aspergillus terreus is a fungus efficient in secretion of commercial enzymes such as cellulases, xylanases and phytases. In the context of biomass saccharification, lignocellulolytic enzyme secretion was analyzed in a strain of A. terreus following liquid culture with sugarcane bagasse (SB) (1% w/v) and soybean hulls (SH) (1% w/v) as sole carbon source, in comparison to glucose (G) (1% w/v). Analysis of the fungal secretome revealed a maximum of 1.017 UI.mL–1 xylanases after growth in minimal medium with SB, and 1.019 UI.mL–1 after incubation with SH as carbon source. The fungal transcriptome was characterized on SB and SH, with gene expression examined in comparison to equivalent growth on G as carbon source. Over 8000 genes were identified, including numerous encoding enzymes and transcription factors involved in the degradation of the plant cell wall, with significant expression modulation according to carbon source. Eighty-nine carbohydrate-active enzyme (CAZyme)-encoding genes were identified following growth on SB, of which 77 were differentially expressed. These comprised 78% glycoside hydrolases, 8% carbohydrate esterases, 2.5% polysaccharide lyases, and 11.5% auxiliary activities. Analysis of the glycoside hydrolase family revealed significant up-regulation for genes encoding 25 different GH family proteins, with predominance for families GH3, 5, 7, 10, and 43. For SH, from a total of 91 CAZyme-encoding genes, 83 were also significantly up-regulated in comparison to G. These comprised 80% glycoside hydrolases, 7% carbohydrate esterases, 5% polysaccharide lyases, 7% auxiliary activities (AA), and 1% glycosyltransferases. Similarly, within the glycoside hydrolases, significant up-regulation was observed for genes encoding 26 different GH family proteins, with predominance again for families GH3, 5, 10, 31, and 43. A. terreus is a promising species for production of enzymes involved in the degradation of plant biomass. Given that this fungus is also able to produce thermophilic enzymes, this first global analysis of the transcriptome following cultivation on lignocellulosic carbon sources offers considerable potential for the application of candidate genes in biorefinery applications.
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Affiliation(s)
- Camila L Corrêa
- Departamento de Biologia Celular, Universidade de Brasília, Campus Universitário Darcy Ribeiro, Brasília, Brazil
| | - Glaucia E O Midorikawa
- Departamento de Biologia Celular, Universidade de Brasília, Campus Universitário Darcy Ribeiro, Brasília, Brazil
| | | | - Eliane Ferreira Noronha
- Departamento de Biologia Celular, Universidade de Brasília, Campus Universitário Darcy Ribeiro, Brasília, Brazil
| | - Gabriel S C Alves
- Departamento de Biologia Celular, Universidade de Brasília, Campus Universitário Darcy Ribeiro, Brasília, Brazil
| | - Roberto Coiti Togawa
- Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica - PqEB, Brasília, Brazil
| | | | | | - Priscila Grynberg
- Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica - PqEB, Brasília, Brazil
| | - Robert N G Miller
- Departamento de Biologia Celular, Universidade de Brasília, Campus Universitário Darcy Ribeiro, Brasília, Brazil
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Pedersen TB, Nielsen MR, Kristensen SB, Spedtsberg EML, Yasmine W, Matthiesen R, Kaniki SEK, Sørensen T, Petersen C, Muff J, Sondergaard TE, Nielsen KL, Wimmer R, Sørensen JL. Heterologous Expression of the Core Genes in the Complex Fusarubin Gene Cluster of Fusarium Solani. Int J Mol Sci 2020; 21:E7601. [PMID: 33066643 PMCID: PMC7589453 DOI: 10.3390/ijms21207601] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 10/06/2020] [Accepted: 10/12/2020] [Indexed: 01/17/2023] Open
Abstract
Through stepwise recreation of the biosynthetic gene cluster containing PKS3 from Fusarium solani, it was possible to produce the core scaffold compound of bostrycoidin, a red aza-anthraquinone pigment in Saccharomyces cerevisiae. This was achieved through sequential transformation associated recombination (TAR) cloning of FvPPT, fsr1, fsr2, and fsr3 into the pESC-vector system, utilizing the inducible bidirectional galactose promoter for heterologous expression in S. cerevisiae. The production of the core metabolite bostrycoidin was investigated through triplicate growth cultures for 1-4 days, where the maximum titer of bostrycoidin was achieved after 2 days of induction, yielding 2.2 mg/L.
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Affiliation(s)
- Tobias Bruun Pedersen
- Aalborg University Esbjerg, Department of Chemistry and Bioscience, Niels Bohrs Vej 8, 6700 Esbjerg, Denmark; (T.B.P.); (M.R.N.); (S.B.K.); (E.M.L.S.); (W.Y.); (R.M.); (S.E.K.K.); (J.M.)
| | - Mikkel Rank Nielsen
- Aalborg University Esbjerg, Department of Chemistry and Bioscience, Niels Bohrs Vej 8, 6700 Esbjerg, Denmark; (T.B.P.); (M.R.N.); (S.B.K.); (E.M.L.S.); (W.Y.); (R.M.); (S.E.K.K.); (J.M.)
| | - Sebastian Birkedal Kristensen
- Aalborg University Esbjerg, Department of Chemistry and Bioscience, Niels Bohrs Vej 8, 6700 Esbjerg, Denmark; (T.B.P.); (M.R.N.); (S.B.K.); (E.M.L.S.); (W.Y.); (R.M.); (S.E.K.K.); (J.M.)
| | - Eva Mie Lang Spedtsberg
- Aalborg University Esbjerg, Department of Chemistry and Bioscience, Niels Bohrs Vej 8, 6700 Esbjerg, Denmark; (T.B.P.); (M.R.N.); (S.B.K.); (E.M.L.S.); (W.Y.); (R.M.); (S.E.K.K.); (J.M.)
| | - Wafaa Yasmine
- Aalborg University Esbjerg, Department of Chemistry and Bioscience, Niels Bohrs Vej 8, 6700 Esbjerg, Denmark; (T.B.P.); (M.R.N.); (S.B.K.); (E.M.L.S.); (W.Y.); (R.M.); (S.E.K.K.); (J.M.)
| | - Rikke Matthiesen
- Aalborg University Esbjerg, Department of Chemistry and Bioscience, Niels Bohrs Vej 8, 6700 Esbjerg, Denmark; (T.B.P.); (M.R.N.); (S.B.K.); (E.M.L.S.); (W.Y.); (R.M.); (S.E.K.K.); (J.M.)
| | - Samba Evelyne Kabemba Kaniki
- Aalborg University Esbjerg, Department of Chemistry and Bioscience, Niels Bohrs Vej 8, 6700 Esbjerg, Denmark; (T.B.P.); (M.R.N.); (S.B.K.); (E.M.L.S.); (W.Y.); (R.M.); (S.E.K.K.); (J.M.)
| | - Trine Sørensen
- Aalborg University Aalborg, Department of Chemistry and Bioscience, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark; (T.S.); (C.P.); (T.E.S.); (K.L.N.); (R.W.)
| | - Celine Petersen
- Aalborg University Aalborg, Department of Chemistry and Bioscience, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark; (T.S.); (C.P.); (T.E.S.); (K.L.N.); (R.W.)
| | - Jens Muff
- Aalborg University Esbjerg, Department of Chemistry and Bioscience, Niels Bohrs Vej 8, 6700 Esbjerg, Denmark; (T.B.P.); (M.R.N.); (S.B.K.); (E.M.L.S.); (W.Y.); (R.M.); (S.E.K.K.); (J.M.)
| | - Teis Esben Sondergaard
- Aalborg University Aalborg, Department of Chemistry and Bioscience, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark; (T.S.); (C.P.); (T.E.S.); (K.L.N.); (R.W.)
| | - Kåre Lehmann Nielsen
- Aalborg University Aalborg, Department of Chemistry and Bioscience, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark; (T.S.); (C.P.); (T.E.S.); (K.L.N.); (R.W.)
| | - Reinhard Wimmer
- Aalborg University Aalborg, Department of Chemistry and Bioscience, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark; (T.S.); (C.P.); (T.E.S.); (K.L.N.); (R.W.)
| | - Jens Laurids Sørensen
- Aalborg University Esbjerg, Department of Chemistry and Bioscience, Niels Bohrs Vej 8, 6700 Esbjerg, Denmark; (T.B.P.); (M.R.N.); (S.B.K.); (E.M.L.S.); (W.Y.); (R.M.); (S.E.K.K.); (J.M.)
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Iewkittayakorn J, Kuechoo K, Sukpondma Y, Rukachaisirikul V, Phongpaichit S, Chotigeat W. Lovastatin Production by Aspergillus sclerotiorum Using Agricultural Waste. Food Technol Biotechnol 2020; 58:230-236. [PMID: 32831575 PMCID: PMC7416121 DOI: 10.17113/ftb.58.02.20.6223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Research background Lovastatin is a well-known drug used to reduce hypercholesterolaemia. However, the cost of lovastatin production is still high. Therefore, alternative low-cost carbon sources for the production of lovastatin are desirable. Experimental approach Four different agricultural wastes, namely corn trunks, rice husks, wild sugarcane, and soya bean sludge, were tested separately as substrates to produce lovastatin using a new fungal strain, Aspergillus sclerotiorum PSU-RSPG 178, under both submerged and solid-state fermentation (SSF). Results and conclusions Of these substrates and cultivation systems, soya bean sludge gave the highest lovastatin yield on dry mass basis of 0.04 mg/g after 14 days of SSF at 25 °C. Therefore, the soya bean sludge was separately supplemented with glucose, wheat flour, trace elements, palm oil, urea and molasses. The addition of the palm oil enhanced the lovastatin yield to 0.99 mg/g. In addition, the optimum conditions, which gave a lovastatin yield of (20±2) mg/g after 18 days of SSF, were soya bean sludge containing 80% moisture (dry basis) at a ratio of soya bean sludge (g) to mycelial agar plugs of 1:4, and a ratio of soya bean sludge (g) to palm oil (mL) of 1:2. Besides, the lovastatin yields obtained from SSF using fresh or dry soya bean sludge were not significantly different. Novelty and scientific contribution We conclude that A. sclerotiorum PSU-RSPG 178 has a good potential as an alternative strain for producing lovastatin using soya bean sludge supplemented with palm oil as a carbon source.
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Affiliation(s)
- Jutarut Iewkittayakorn
- Department of Molecular Biotechnology and Bioinformatics, Faculty of Science, Prince of Songkla University, Hat Yai, 90112 Songkhla, Thailand
| | - Kannika Kuechoo
- Department of Molecular Biotechnology and Bioinformatics, Faculty of Science, Prince of Songkla University, Hat Yai, 90112 Songkhla, Thailand
| | - Yaowapa Sukpondma
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, 90112 Songkhla, Thailand
| | - Vatcharin Rukachaisirikul
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, 90112 Songkhla, Thailand
| | - Souwalak Phongpaichit
- Department of Microbiology, Faculty of Science, Prince of Songkla University, Hat Yai, 90112 Songkhla, Thailand
| | - Wilaiwan Chotigeat
- Department of Molecular Biotechnology and Bioinformatics, Faculty of Science, Prince of Songkla University, Hat Yai, 90112 Songkhla, Thailand.,Center for Genomics and Bioinformatics Research, Faculty of Science, Prince of Songkla University, Hat Yai, 90112 Songkhla, Thailand
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Tavakol Noorabadi M, Babaeizad V, Zare R, Asgari B, Haidukowski M, Epifani F, Stea G, Moretti A, Logrieco AF, Susca A. Isolation, Molecular Identification, and Mycotoxin Production of Aspergillus Species Isolated from the Rhizosphere of Sugarcane in the South of Iran. Toxins (Basel) 2020; 12:E122. [PMID: 32075204 PMCID: PMC7076768 DOI: 10.3390/toxins12020122] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 02/03/2020] [Accepted: 02/12/2020] [Indexed: 11/17/2022] Open
Abstract
Knowledge of the genetic diversity detected among fungal species belonging to the genus Aspergillus is of key importance for explaining their important ecological role in the environment and agriculture. The current study aimed to identify Aspergillus species occurring in the rhizosphere of sugarcane in the South of Iran, and to investigate their mycotoxin profiles. One-hundred and twenty-five Aspergillus strains were isolated from the soil of eight major sugarcane-producing sites, and were molecularly identified using sequences of partial -tubulin (benA) and partial calmodulin (CaM) genes. Our molecular and phylogenetic results showed that around 70% of strains belonged to the Aspergillus section Nigri, and around 25% of species belonged to the Aspergillus section Terrei. Species belonging to both sections are able to produce different mycotoxins. The production of mycotoxins was measured for each species, according to their known mycotoxin profile: patulin (PAT) and sterigmatocystin (STG) for Aspergillusterreus; ochratoxin A (OTA) and fumonisins for Aspergilluswelwitschiae; and OTA alone for Aspergillustubingensis. The data showed that the production of OTA was detected in only 4 out of 10 strains of A.welwitschiae, while none of the A.tubingensis strains analyzed produced the mycotoxin. Fumonisins were produced by 8 out of 10 strains of A.welwitschiae. Finally, none of the 23 strains of A.terreus produced STG, while 13 of them produced PAT. The occurrence of such mycotoxigenic plant pathogens among the fungal community occurring in soil of sugarcane fields may represent a significant source of inoculum for the possible colonization of sugarcane plants, since the early stages of plant growth, due to the mycotoxin production capability, could have worrisome implications in terms of both the safety and loss of products at harvest.
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Affiliation(s)
- Maryam Tavakol Noorabadi
- Department of Plant Protection, Sari Agricultural Sciences and Natural Resources University, 48181 68984 Sari, Iran; (M.T.N.); (V.B.)
| | - Valiollah Babaeizad
- Department of Plant Protection, Sari Agricultural Sciences and Natural Resources University, 48181 68984 Sari, Iran; (M.T.N.); (V.B.)
| | - Rasoul Zare
- Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), 19858 13111 Tehran, Iran; (R.Z.); (B.A.)
| | - Bita Asgari
- Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), 19858 13111 Tehran, Iran; (R.Z.); (B.A.)
| | - Miriam Haidukowski
- Institute of Sciences of Food Production, National Research Council of Italy, 70126 Bari, Italy; (M.H.); (F.E.); (G.T.); (A.F.L.)
| | - Filomena Epifani
- Institute of Sciences of Food Production, National Research Council of Italy, 70126 Bari, Italy; (M.H.); (F.E.); (G.T.); (A.F.L.)
| | - Gaetano Stea
- Institute of Sciences of Food Production, National Research Council of Italy, 70126 Bari, Italy; (M.H.); (F.E.); (G.T.); (A.F.L.)
| | - Antonio Moretti
- Institute of Sciences of Food Production, National Research Council of Italy, 70126 Bari, Italy; (M.H.); (F.E.); (G.T.); (A.F.L.)
| | - Antonio Francesco Logrieco
- Institute of Sciences of Food Production, National Research Council of Italy, 70126 Bari, Italy; (M.H.); (F.E.); (G.T.); (A.F.L.)
| | - Antonia Susca
- Institute of Sciences of Food Production, National Research Council of Italy, 70126 Bari, Italy; (M.H.); (F.E.); (G.T.); (A.F.L.)
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Leo TK, Garba S, Abubakar D, Sazili AQ, Candyrine SCL, Jahromi MF, Goh YM, Ronimus R, Muetzel S, Liang JB. Naturally Produced Lovastatin Modifies the Histology and Proteome Profile of Goat Skeletal Muscle. Animals (Basel) 2019; 10:ani10010072. [PMID: 31906061 PMCID: PMC7022420 DOI: 10.3390/ani10010072] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 11/11/2019] [Accepted: 11/12/2019] [Indexed: 12/11/2022] Open
Abstract
Simple Summary Enteric methane formation in ruminants is one of the major contributors to climate change. Among the potential strategies, the supplementation of naturally produced lovastatin has been reported as one of the promising approaches for the mitigation of methane emissions. Nevertheless, statins have been associated with the development of muscle-related adverse effects which could affect the health and wellbeing of the animals. We have reported previously that supplementation of naturally produced lovastatin at 2 and 4 mg/kg body weight (BW), reduced methane emissions in goats without adversely affecting rumen fermentation and animal performance, except at higher level of lovastatin (6 mg/kg BW). However, the effects of lovastatin on the skeletal muscle in goats and the associated mechanisms have not been studied. Hence, the present study aimed to examine the effects of lovastatin on the histology of the goat skeletal muscle from the above study and to further elucidate the related underlying biochemistry processes. Histology analysis observed marked degeneration in the longissimus thoracis et lumborum muscle of goats supplemented with 6 mg lovastatin/kg BW. Our preliminary label-free proteomics analysis identified approximately 400 proteins in total, a number of which were differentially expressed, which are involved in energy metabolism and may have contributed to the observed skeletal muscle damage above 4 mg/kg BW. Abstract This study was conducted to examine the effects of different levels of lovastatin on the histological and sarcoplasmic proteome profile of goat skeletal muscle. A total of 20 intact male Saanen goats were randomly assigned in equal numbers to four groups and fed a total mixed ration containing 50% rice straw, 22.8% concentrates and 27.2% of various proportions of untreated or treated palm kernel cake (PKC) to achieve the target daily intake levels of 0 (Control), 2 (Low), 4 (Medium) or 6 (High) mg lovastatin/kg BW. A histological examination discovered that the longissimus thoracis et lumborum muscle of animals from the Medium and High treatment groups showed abnormalities in terms of necrosis, degeneration, interstitial space and vacuolization. Our preliminary label-free proteomics analysis demonstrates that lovastatin supplementation induced complex modifications to the protein expression patterns of the skeletal muscle of the goat which were associated with the metabolism of carbohydrate and creatine, cell growth and development processes and other metabolic processes. The changes in these biochemical processes indicate perturbations in energy metabolism, which could play a major role in the development of myopathy. In conclusion, the present study suggests that supplementation of naturally produced lovastatin above 4 mg/kg BW could adversely affecting the health and wellbeing of treated animals.
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Affiliation(s)
- Teik Kee Leo
- Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, Serdang 43400, Malaysia; (T.K.L.); (S.G.); (A.Q.S.); (Y.M.G.)
| | - Sani Garba
- Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, Serdang 43400, Malaysia; (T.K.L.); (S.G.); (A.Q.S.); (Y.M.G.)
| | - Danmaigoro Abubakar
- Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang 43400, Malaysia;
| | - Awis Qurni Sazili
- Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, Serdang 43400, Malaysia; (T.K.L.); (S.G.); (A.Q.S.); (Y.M.G.)
- Faculty of Agriculture, Universiti Putra Malaysia, Serdang 43400, Malaysia
| | - Su Chui Len Candyrine
- Faculty of Sustainable Agriculture, Universiti Malaysia Sabah, Sandakan 90000, Malaysia;
| | | | - Yong Meng Goh
- Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, Serdang 43400, Malaysia; (T.K.L.); (S.G.); (A.Q.S.); (Y.M.G.)
- Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang 43400, Malaysia;
| | - Ron Ronimus
- Rumen Microbiology, AgResearch, Palmerston North 4442, New Zealand; (R.R.); (S.M.)
| | - Stefan Muetzel
- Rumen Microbiology, AgResearch, Palmerston North 4442, New Zealand; (R.R.); (S.M.)
| | - Juan Boo Liang
- Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, Serdang 43400, Malaysia; (T.K.L.); (S.G.); (A.Q.S.); (Y.M.G.)
- Correspondence:
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Balraj J, Jairaman K, Kalieswaran V, Jayaraman A. Bioprospecting lovastatin production from a novel producer Cunninghamella blakesleeana. 3 Biotech 2018; 8:359. [PMID: 30105184 PMCID: PMC6081836 DOI: 10.1007/s13205-018-1384-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 07/30/2018] [Indexed: 10/28/2022] Open
Abstract
Beside anti-cholesterol activity, lovastatin garners worldwide attention for therapeutical application against various diseases especially cancer. A total of 36 filamentous fungi from soil samples were isolated and screened for lovastatin production by yeast growth bioassay method. C9 strain (later identified as Cunninghamella blakesleeana) was screened as potential strain of lovastatin production. Further confirmation of the compound was made using TLC, HPTLC and HPLC in which similar Rf value, densitogram peak and chromatogram peak against the standard lovastatin were observed, respectively. The purified lovastatin subjected for IR analysis showed a lactone ring peak at 1763.63 cm-1 similar to standard lovastatin. Further structural analysis including NMR and LC-MS of the purified lovastatin reassures the molecular formula and molecular weight similar to standard. In quantitative terms, C. blakesleeana, Aspergillus terreus and Aspergillus flavus produced 1.4 mg g-1 DWS, 0.83 mg g-1 DWS and 0.3 mg g-1 DWS of lovastatin, respectively, (p < 0.0001) without any optimization. Lovastatin showed significant antioxidant property with IC50: 145.9 µg mL-1 (140 µL), and the percentage of inhibition is maximum at 199.5 µg/mL which is statistically significant (p < 0.0001).
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Affiliation(s)
- Janani Balraj
- Cancer Therapeutics Lab, Department of Microbial Biotechnology, Bharathiar University, Coimbatore, Tamil Nadu 641046 India
| | - Karunyadevi Jairaman
- Cancer Therapeutics Lab, Department of Microbial Biotechnology, Bharathiar University, Coimbatore, Tamil Nadu 641046 India
| | - Vidhya Kalieswaran
- Cancer Therapeutics Lab, Department of Microbial Biotechnology, Bharathiar University, Coimbatore, Tamil Nadu 641046 India
| | - Angayarkanni Jayaraman
- Cancer Therapeutics Lab, Department of Microbial Biotechnology, Bharathiar University, Coimbatore, Tamil Nadu 641046 India
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Zhgun AA, Dumina MV, Voinova TM, Dzhavakhiya VV, Eldarov MA. Role of acetyl-CoA Synthetase and LovE Regulator Protein of Polyketide Biosynthesis in Lovastatin Production by Wild-Type and Overproducing Aspergillus terreus Strains. APPL BIOCHEM MICRO+ 2018. [DOI: 10.1134/s0003683818020138] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Bioprocessing of agro-industrial residues for optimization of xylanase production by solid- state fermentation in flask and tray bioreactor. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2018. [DOI: 10.1016/j.bcab.2018.01.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Uday USP, Majumdar R, Tiwari ON, Mishra U, Mondal A, Bandyopadhyay TK, Bhunia B. Isolation, screening and characterization of a novel extracellular xylanase from A spergillus niger (KP874102.1) and its application in orange peel hydrolysis. Int J Biol Macromol 2017; 105:401-409. [DOI: 10.1016/j.ijbiomac.2017.07.066] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Revised: 07/08/2017] [Accepted: 07/10/2017] [Indexed: 12/12/2022]
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Aspergillus terreus treated rice straw suppresses methane production and enhances feed digestibility in goats. Trop Anim Health Prod 2017; 50:565-571. [PMID: 29150805 DOI: 10.1007/s11250-017-1470-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 11/06/2017] [Indexed: 11/27/2022]
Abstract
The objectives of this study were to test the efficacy of producing lovastatin in rice straw treated with Aspergillus terreus in larger laboratory scale following the procedure previously reported and to investigate the effectiveness of the treated rice straw containing lovastatin on methane mitigation in goats. The concentration of lovastatin in the treated rice straw was 0.69 ± 0.05 g/kg dry matter (DM) rice straw. Our results showed that supplementation of lovastatin at 4.14 mg/kg BW reduced methane production by 32% while improving the DM digestibility by 13% (P < 0.05) in goats fed fermented rice straw compared to those fed untreated rice straw. Populations of total methanogens and Methanobacteriales species were significantly reduced (P < 0.05) while the population of total bacteria and Ruminococcus albus were increased in the treatment group (P < 0.05). Our results demonstrated that lovastatin in the treated rice straw acted specifically on the methanogens by inhibiting the activity of HMG-CoA reductase in the methanogens' cell membrane biosynthesis pathway and thus the growth of rumen methanogens as previously reported. This study provides a simple yet practical approach to mitigate enteric methane production particularly in the developing countries which depend heavily on the use of agro-biomass such as rice straw to feed their ruminant animals.
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Notable fibrolytic enzyme production by Aspergillus spp. isolates from the gastrointestinal tract of beef cattle fed in lignified pastures. PLoS One 2017; 12:e0183628. [PMID: 28850605 PMCID: PMC5574564 DOI: 10.1371/journal.pone.0183628] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 08/08/2017] [Indexed: 11/25/2022] Open
Abstract
Fungi have the ability to degrade vegetal cell wall carbohydrates, and their presence in the digestive tract of ruminants can minimize the effects of lignified forage on ruminal fermentation. Here, we evaluated enzyme production by Aspergillus spp. isolates from the digestive tracts of cattle grazed in tropical pastures during the dry season. Filamentous fungi were isolated from rumen and feces by culture in cellulose-based medium. Ninety fungal strains were isolated and identified by rDNA sequence analysis, microculture, or both. Aspergillus terreus was the most frequently isolated species, followed by Aspergillus fumigatus. The isolates were characterized with respect to their cellulolytic, xylanolytic, and lignolytic activity through qualitative evaluation in culture medium containing a specific corresponding carbon source. Carboxymethyl cellulase (CMCase) activity was quantified by the reducing sugar method. In the avicel and xilan degradation test, the enzyme activity (EA) at 48 h was significantly higher other periods (P < 0.05). Intra- and inter-specific differences in EA were verified, and high levels of phenoloxidases, which are crucial for lignin degradation, were observed in 28.9% of the isolates. Aspergillus terreus showed significantly higher EA for avicelase (3.96 ±1.77) and xylanase (3.13 ±.091) than the other Aspergillus species at 48 h of incubation. Isolates AT13 and AF69 showed the highest CMCase specific activity (54.84 and 33.03 U mg-1 protein, respectively). Selected Aspergillus spp. isolates produced remarkable levels of enzymes involved in vegetal cell wall degradation, suggesting their potential as antimicrobial additives or probiotics in ruminant diets.
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Health Risks Associated with Exposure to Filamentous Fungi. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:ijerph14070719. [PMID: 28677641 PMCID: PMC5551157 DOI: 10.3390/ijerph14070719] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 06/19/2017] [Accepted: 06/23/2017] [Indexed: 01/06/2023]
Abstract
Filamentous fungi occur widely in the environment, contaminating soil, air, food and other substrates. Due to their wide distribution, they have medical and economic implications. Regardless of their use as a source of antibiotics, vitamins and raw materials for various industrially important chemicals, most fungi and filamentous fungi produce metabolites associated with a range of health risks, both in humans and in animals. The association of filamentous fungi and their metabolites to different negative health conditions in humans and animals, has contributed to the importance of investigating different health risks induced by this family of heterotrophs. This review aims to discuss health risks associated with commonly occurring filamentous fungal species which belong to genera Aspergillus, Penicillium and Fusarium, as well as evaluating their pathogenicity and mycotoxic properties.
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El-Gendy MMAA, Al-Zahrani HAA, El-Bondkly AMA. Genome Shuffling of Mangrove Endophytic Aspergillus luchuensis MERV10 for Improving the Cholesterol-Lowering Agent Lovastatin under Solid State Fermentation. MYCOBIOLOGY 2016; 44:171-179. [PMID: 27790068 PMCID: PMC5078130 DOI: 10.5941/myco.2016.44.3.171] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Revised: 06/17/2016] [Accepted: 06/25/2016] [Indexed: 06/01/2023]
Abstract
In the screening of marine mangrove derived fungi for lovastatin productivity, endophytic Aspergillus luchuensis MERV10 exhibited the highest lovastatin productivity (9.5 mg/gds) in solid state fermentation (SSF) using rice bran. Aspergillus luchuensis MERV10 was used as the parental strain in which to induce genetic variabilities after application of different mixtures as well as doses of mutagens followed by three successive rounds of genome shuffling. Four potent mutants, UN6, UN28, NE11, and NE23, with lovastatin productivity equal to 2.0-, 2.11-, 1.95-, and 2.11-fold higher than the parental strain, respectively, were applied for three rounds of genome shuffling as the initial mutants. Four hereditarily stable recombinants (F3/3, F3/7, F3/9, and F3/13) were obtained with lovastatin productivity equal to 50.8, 57.0, 49.7, and 51.0 mg/gds, respectively. Recombinant strain F3/7 yielded 57.0 mg/gds of lovastatin, which is 6-fold and 2.85-fold higher, respectively, than the initial parental strain and the highest mutants UN28 and NE23. It was therefore selected for the optimization of lovastatin production through improvement of SSF parameters. Lovastatin productivity was increased 32-fold through strain improvement methods, including mutations and three successive rounds of genome shuffling followed by optimizing SSF factors.
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Affiliation(s)
- Mervat Morsy Abbas Ahmed El-Gendy
- Department of Biological Sciences, Faculty of Sciences, King Abdulaziz University (KAU), Jeddah 21589, Saudi Arabia.; Chemistry of Natural and Microbial Products Department, National Research Centre, Dokki, Giza 12622, Egypt
| | - Hind A A Al-Zahrani
- Department of Biological Sciences, Faculty of Sciences, Jeddah University, Jeddah 80203, Saudi Arabia
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Subhan M, Faryal R, Macreadie I. Exploitation of Aspergillus terreus for the Production of Natural Statins. J Fungi (Basel) 2016; 2:jof2020013. [PMID: 29376930 PMCID: PMC5753075 DOI: 10.3390/jof2020013] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 04/19/2016] [Accepted: 04/26/2016] [Indexed: 01/29/2023] Open
Abstract
The fungus Aspergillus (A.) terreus has dominated the biological production of the “blockbuster” drugs known as statins. The statins are a class of drugs that inhibit HMG-CoA reductase and lead to lower cholesterol production. The statins were initially discovered in fungi and for many years fungi were the sole source for the statins. At present, novel chemically synthesised statins are produced as inspired by the naturally occurring statin molecules. The isolation of the natural statins, compactin, mevastatin and lovastatin from A. terreus represents one of the great achievements of industrial microbiology. Here we review the discovery of statins, along with strategies that have been applied to scale up their production by A. terreus strains. The strategies encompass many of the techniques available in industrial microbiology and include the optimization of media and fermentation conditions, the improvement of strains through classical mutagenesis, induced genetic manipulation and the use of statistical design.
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Affiliation(s)
- Mishal Subhan
- Department of Microbiology, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan.
| | - Rani Faryal
- Department of Microbiology, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan.
| | - Ian Macreadie
- School of Science, RMIT University, Bundoora, Victoria 3083, Australia.
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Muskal SM, Sliman J, Kokai-Kun J, Pimentel M, Wacher V, Gottlieb K. Lovastatin lactone may improve irritable bowel syndrome with constipation (IBS-C) by inhibiting enzymes in the archaeal methanogenesis pathway. F1000Res 2016; 5:606. [PMID: 27347377 PMCID: PMC4909102 DOI: 10.12688/f1000research.8406.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/20/2016] [Indexed: 12/14/2023] Open
Abstract
UNLABELLED Methane produced by the methanoarchaeon Methanobrevibacter smithii ( M. smithii) has been linked to constipation, irritable bowel syndrome with constipation (IBS-C), and obesity. Lovastatin, which demonstrates a cholesterol-lowering effect by the inhibition of HMG-CoA reductase, may also have an anti-methanogenesis effect through direct inhibition of enzymes in the archaeal methanogenesis pathway. We conducted protein-ligand docking experiments to evaluate this possibility. Results are consistent with recent clinical findings. METHODS F420-dependent methylenetetrahydromethanopterin dehydrogenase ( mtd), a key methanogenesis enzyme was modeled for two different methanogenic archaea: M. smithii and Methanopyrus kandleri. Once protein models were developed, ligand-binding sites were identified. Multiple ligands and their respective protonation, isomeric and tautomeric representations were docked into each site, including F420-coenzyme (natural ligand), lactone and β-hydroxyacid forms of lovastatin and simvastatin, and other co-complexed ligands found in related crystal structures. RESULTS 1) Generally, for each modeled site the lactone form of the statins had more favorable site interactions compared to F420; 2) The statin lactone forms generally had the most favorable docking scores, even relative to the native template PDB ligands; and 3) The statin β-hydroxyacid forms had less favorable docking scores, typically scoring in the middle with some of the F420 tautomeric forms. Consistent with these computational results were those from a recent phase II clinical trial ( NCT02495623) with a proprietary, modified-release lovastatin-lactone (SYN-010) in patients with IBS-C, which showed a reduction in symptoms and breath methane levels, compared to placebo. CONCLUSION The lactone form of lovastatin exhibits preferential binding over the native-F420 coenzyme ligand in silico and thus could inhibit the activity of the key M. smithii methanogenesis enzyme mtd in vivo. Statin lactones may thus exert a methane-reducing effect that is distinct from cholesterol lowering activity, which requires HMGR inhibition by statin β-hydroxyacid forms.
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Muskal SM, Sliman J, Kokai-Kun J, Pimentel M, Wacher V, Gottlieb K. Lovastatin lactone may improve irritable bowel syndrome with constipation (IBS-C) by inhibiting enzymes in the archaeal methanogenesis pathway. F1000Res 2016; 5:606. [PMID: 27347377 PMCID: PMC4909102 DOI: 10.12688/f1000research.8406.3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/20/2016] [Indexed: 12/16/2022] Open
Abstract
UNLABELLED Methane produced by the methanoarchaeon Methanobrevibacter smithii ( M. smithii) has been linked to constipation, irritable bowel syndrome with constipation (IBS-C), and obesity. Lovastatin, which demonstrates a cholesterol-lowering effect by the inhibition of HMG-CoA reductase, may also have an anti-methanogenesis effect through direct inhibition of enzymes in the archaeal methanogenesis pathway. We conducted protein-ligand docking experiments to evaluate this possibility. Results are consistent with recent clinical findings. METHODS F420-dependent methylenetetrahydromethanopterin dehydrogenase ( mtd), a key methanogenesis enzyme was modeled for two different methanogenic archaea: M. smithii and Methanopyrus kandleri. Once protein models were developed, ligand-binding sites were identified. Multiple ligands and their respective protonation, isomeric and tautomeric representations were docked into each site, including F420-coenzyme (natural ligand), lactone and β-hydroxyacid forms of lovastatin and simvastatin, and other co-complexed ligands found in related crystal structures. RESULTS 1) Generally, for each modeled site the lactone form of the statins had more favorable site interactions compared to F420; 2) The statin lactone forms generally had the most favorable docking scores, even relative to the native template PDB ligands; and 3) The statin β-hydroxyacid forms had less favorable docking scores, typically scoring in the middle with some of the F420 tautomeric forms. Consistent with these computational results were those from a recent phase II clinical trial ( NCT02495623) with a proprietary, modified-release lovastatin-lactone (SYN-010) in patients with IBS-C, which showed a reduction in symptoms and breath methane levels, compared to placebo. CONCLUSION The lactone form of lovastatin exhibits preferential binding over the native-F420 coenzyme ligand in silico and thus could inhibit the activity of the key M. smithii methanogenesis enzyme mtd in vivo. Statin lactones may thus exert a methane-reducing effect that is distinct from cholesterol lowering activity, which requires HMGR inhibition by statin β-hydroxyacid forms.
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Gottlieb K, Wacher V, Sliman J, Pimentel M. Review article: inhibition of methanogenic archaea by statins as a targeted management strategy for constipation and related disorders. Aliment Pharmacol Ther 2016; 43:197-212. [PMID: 26559904 PMCID: PMC4737270 DOI: 10.1111/apt.13469] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 09/29/2015] [Accepted: 10/20/2015] [Indexed: 12/20/2022]
Abstract
BACKGROUND Observational studies show a strong association between delayed intestinal transit and the production of methane. Experimental data suggest a direct inhibitory activity of methane on the colonic and ileal smooth muscle and a possible role for methane as a gasotransmitter. Archaea are the only confirmed biological sources of methane in nature and Methanobrevibacter smithii is the predominant methanogen in the human intestine. AIM To review the biosynthesis and composition of archaeal cell membranes, archaeal methanogenesis and the mechanism of action of statins in this context. METHODS Narrative review of the literature. RESULTS Statins can inhibit archaeal cell membrane biosynthesis without affecting bacterial numbers as demonstrated in livestock and humans. This opens the possibility of a therapeutic intervention that targets a specific aetiological factor of constipation while protecting the intestinal microbiome. While it is generally believed that statins inhibit methane production via their effect on cell membrane biosynthesis, mediated by inhibition of the HMG-CoA reductase, there is accumulating evidence for an alternative or additional mechanism of action where statins inhibit methanogenesis directly. It appears that this other mechanism may predominate when the lactone form of statins, particularly lovastatin lactone, is administered. CONCLUSIONS Clinical development appears promising. A phase 2 clinical trial is currently in progress that evaluates the effect of lovastatin lactone on methanogenesis and symptoms in patients with irritable bowel syndrome with constipation. The review concludes with an outlook for the future and subsequent work that needs to be done.
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Affiliation(s)
| | - V. Wacher
- Synthetic BiologicsInc.RockvilleMDUSA
| | - J. Sliman
- Synthetic BiologicsInc.RockvilleMDUSA
| | - M. Pimentel
- GastroenterologyCedars‐Sinai Medical CenterLos AngelesCAUSA
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Lovastatin production: From molecular basis to industrial process optimization. Biotechnol Adv 2015; 33:648-65. [PMID: 25868803 DOI: 10.1016/j.biotechadv.2015.04.001] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 04/04/2015] [Accepted: 04/05/2015] [Indexed: 12/22/2022]
Abstract
Lovastatin, composed of secondary metabolites produced by filamentous fungi, is the most frequently used drug for hypercholesterolemia treatment due to the fact that lovastatin is a competitive inhibitor of HMG-CoA reductase. Moreover, recent studies have shown several important applications for lovastatin including antimicrobial agents and treatments for cancers and bone diseases. Studies regarding the lovastatin biosynthetic pathway have also demonstrated that lovastatin is synthesized from two-chain reactions using acetate and malonyl-CoA as a substrate. It is also known that there are two key enzymes involved in the biosynthetic pathway called polyketide synthases (PKS). Those are characterized as multifunctional enzymes and are encoded by specific genes organized in clusters on the fungal genome. Since it is a secondary metabolite, cultivation process optimization for lovastatin biosynthesis has included nitrogen limitation and non-fermentable carbon sources such as lactose and glycerol. Additionally, the influences of temperature, pH, agitation/aeration, and particle and inoculum size on lovastatin production have been also described. Although many reviews have been published covering different aspects of lovastatin production, this review brings, for the first time, complete information about the genetic basis for lovastatin production, detection and quantification, strain screening and cultivation process optimization. Moreover, this review covers all the information available from patent databases covering each protected aspect during lovastatin bio-production.
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Parthasarathy R, Sathiyabama M. Lovastatin-producing endophytic fungus isolated from a medicinal plant Solanum xanthocarpum. Nat Prod Res 2015; 29:2282-6. [DOI: 10.1080/14786419.2015.1016938] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Lovastatin production by Aspergillus terreus using lignocellulose biomass in large scale packed bed reactor. FOOD AND BIOPRODUCTS PROCESSING 2014. [DOI: 10.1016/j.fbp.2013.10.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Segato F, Berto GL, Ares de Araújo E, Muniz JR, Polikarpov I. Expression, purification, crystallization and preliminary X-ray diffraction analysis of Aspergillus terreus endo-β-1,4-glucanase from glycoside hydrolase family 12. Acta Crystallogr F Struct Biol Commun 2014; 70:267-70. [PMID: 24637772 PMCID: PMC3936441 DOI: 10.1107/s2053230x13034936] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2013] [Accepted: 12/30/2013] [Indexed: 11/10/2022] Open
Abstract
Endoglucanases are important enzymes that are involved in the modification and degradation of cellulose. Filamentous fungi such as Aspergillus terreus are effective biomass degraders in nature owing to their capacity to produce an enzymatic arsenal of glycoside hydrolases, including endoglucanase from glycoside hydrolase family 12 (GH12). The A. terreus GH12 endoglucanase was cloned and overexpressed in A. nidulans, purified and crystallized. A single crystal was obtained from a solution consisting of 2 M ammonium sulfate, 5%(v/v) 2-propanol. X-ray diffraction data were collected to a resolution of 1.85 Å using synchrotron radiation and a preliminary molecular-replacement solution was obtained in the trigonal space group P3(2)21. The unit-cell parameters were a = b = 103.24, c = 48.96 Å.
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Affiliation(s)
- Fernando Segato
- Instituto de Física de São Carlos, Universidade de São Paulo, Avenida Trabalhador Saocarlense 400, 13566-590 São Carlos-SP, Brazil
| | - Gabriela L. Berto
- Instituto de Física de São Carlos, Universidade de São Paulo, Avenida Trabalhador Saocarlense 400, 13566-590 São Carlos-SP, Brazil
| | - Evandro Ares de Araújo
- Instituto de Física de São Carlos, Universidade de São Paulo, Avenida Trabalhador Saocarlense 400, 13566-590 São Carlos-SP, Brazil
| | - João Renato Muniz
- Instituto de Física de São Carlos, Universidade de São Paulo, Avenida Trabalhador Saocarlense 400, 13566-590 São Carlos-SP, Brazil
| | - Igor Polikarpov
- Instituto de Física de São Carlos, Universidade de São Paulo, Avenida Trabalhador Saocarlense 400, 13566-590 São Carlos-SP, Brazil
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Tuntevski K, Durney BC, Snyder AK, LaSala PR, Nayak AP, Green BJ, Beezhold DH, Rio RVM, Holland LA, Lukomski S. Aspergillus collagen-like genes (acl): identification, sequence polymorphism, and assessment for PCR-based pathogen detection. Appl Environ Microbiol 2013; 79:7882-95. [PMID: 24123732 PMCID: PMC3837832 DOI: 10.1128/aem.02835-13] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Accepted: 10/02/2013] [Indexed: 12/16/2022] Open
Abstract
The genus Aspergillus is a burden to public health due to its ubiquitous presence in the environment, its production of allergens, and wide demographic susceptibility among cystic fibrosis, asthmatic, and immunosuppressed patients. Current methods of detection of Aspergillus colonization and infection rely on lengthy morphological characterization or nonstandardized serological assays that are restricted to identifying a fungal etiology. Collagen-like genes have been shown to exhibit species-specific conservation across the noncollagenous regions as well as strain-specific polymorphism in the collagen-like regions. Here we assess the conserved region of the Aspergillus collagen-like (acl) genes and explore the application of PCR amplicon size-based discrimination among the five most common etiologic species of the Aspergillus genus, including Aspergillus fumigatus, A. flavus, A. nidulans, A. niger, and A. terreus. Genetic polymorphism and phylogenetic analysis of the aclF1 gene were additionally examined among the available strains. Furthermore, the applicability of the PCR-based assay to identification of these five species in cultures derived from sputum and bronchoalveolar fluid from 19 clinical samples was explored. Application of capillary electrophoresis on nanogels was additionally demonstrated to improve the discrimination between Aspergillus species. Overall, this study demonstrated that Aspergillus acl genes could be used as PCR targets to discriminate between clinically relevant Aspergillus species. Future studies aim to utilize the detection of Aspergillus acl genes in PCR and microfluidic applications to determine the sensitivity and specificity for the identification of Aspergillus colonization and invasive aspergillosis in immunocompromised subjects.
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Affiliation(s)
| | | | | | - P. Rocco LaSala
- Department of Pathology, West Virginia University
- Clinical Laboratory, West Virginia University Healthcare, Morgantown, West Virginia, USA
| | - Ajay P. Nayak
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health (NIOSH), Centers for Disease Control and Prevention, Morgantown, West Virginia, USA
| | - Brett J. Green
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health (NIOSH), Centers for Disease Control and Prevention, Morgantown, West Virginia, USA
| | - Donald H. Beezhold
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health (NIOSH), Centers for Disease Control and Prevention, Morgantown, West Virginia, USA
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30
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Lovastatin in Aspergillus terreus: fermented rice straw extracts interferes with methane production and gene expression in Methanobrevibacter smithii. BIOMED RESEARCH INTERNATIONAL 2013; 2013:604721. [PMID: 23710454 PMCID: PMC3655455 DOI: 10.1155/2013/604721] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Revised: 03/27/2013] [Accepted: 03/27/2013] [Indexed: 12/26/2022]
Abstract
Lovastatin, a natural byproduct of some fungi, is able to inhibit HMG-CoA (3-hydroxy-3methyl glutaryl CoA) reductase. This is a key enzyme involved in isoprenoid synthesis and essential for cell membrane formation in methanogenic Archaea. In this paper, experiments were designed to test the hypothesis that lovastatin secreted by Aspergillus terreus in fermented rice straw extracts (FRSE) can inhibit growth and CH4 production in Methanobrevibacter smithii (a test methanogen). By HPLC analysis, 75% of the total lovastatin in FRSE was in the active hydroxyacid form, and in vitro studies confirmed that this had a stronger effect in reducing both growth and CH4 production in M. smithii compared to commercial lovastatin. Transmission electron micrographs revealed distorted morphological divisions of lovastatin- and FRSE-treated M. smithii cells, supporting its role in blocking normal cell membrane synthesis. Real-time PCR confirmed that both commercial lovastatin and FRSE increased (P < 0.01) the expression of HMG-CoA reductase gene (hmg). In addition, expressions of other gene transcripts in M. smithii. with a key involvement in methanogenesis were also affected. Experimental confirmation that CH4 production is inhibited by lovastatin in A. terreus-fermented rice straw paves the way for its evaluation as a feed additive for mitigating CH4 production in ruminants.
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Faseleh Jahromi M, Liang JB, Mohamad R, Goh YM, Shokryazdan P, Ho YW. Lovastatin-enriched rice straw enhances biomass quality and suppresses ruminal methanogenesis. BIOMED RESEARCH INTERNATIONAL 2013; 2013:397934. [PMID: 23484116 PMCID: PMC3581142 DOI: 10.1155/2013/397934] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 12/22/2012] [Accepted: 12/28/2012] [Indexed: 01/08/2023]
Abstract
The primary objective of this study was to test the hypothesis that solid state fermentation (SSF) of agro-biomass (using rice straw as model); besides, breaking down its lignocellulose content to improve its nutritive values also produces lovastatin which could be used to suppress methanogenesis in the rumen ecosystem. Fermented rice straw (FRS) containing lovastatin after fermentation with Aspergillus terreus was used as substrate for growth study of rumen microorganisms using in vitro gas production method. In the first experiment, the extract from the FRS (FRSE) which contained lovastatin was evaluated for its efficacy for reduction in methane (CH4) production, microbial population, and activity in the rumen fluid. FRSE reduced total gas and CH4 productions (P < 0.01). It also reduced (P < 0.01) total methanogens population and increased the cellulolytic bacteria including Ruminococcus albus, Fibrobacter succinogenes (P < 0.01), and Ruminococcus flavefaciens (P < 0.05). Similarly, FRS reduced total gas and CH4 productions, methanogens population, but increased in vitro dry mater digestibility compared to the non-fermented rice straw. Lovastatin in the FRSE and the FRS significantly increased the expression of HMG-CoA reductase gene that produces HMG-CoA reductase, a key enzyme for cell membrane production in methanogenic Archaea.
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Affiliation(s)
| | - Juan Boo Liang
- Institute of Tropical Agriculture, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Rosfarizan Mohamad
- Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Yong Meng Goh
- Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Parisa Shokryazdan
- Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Yin Wan Ho
- Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
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