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Naseri T, Mousavi SM, Liese A, Kuchta K. Bioleaching of valuable metals from spent LIBs followed by selective recovery of manganese using the precipitation method: Metabolite maximization and process optimization. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 343:118197. [PMID: 37216767 DOI: 10.1016/j.jenvman.2023.118197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 05/10/2023] [Accepted: 05/15/2023] [Indexed: 05/24/2023]
Abstract
Despite the increased demand for resource recovery from spent lithium-ion batteries (LIBs), low Mn leaching efficiencies have hindered the development of this technology. A novel process was devised to enhance the dissolution of metals by producing citric acid using a molasses medium by Penicillium citrinum. This investigation used response surface methodology to investigate the influence of molasses concentration and media components on citric acid production, which demonstrated that molasses (18.5% w/w), KH2PO4 (3.8 g/L), MgSO4.7H2O (0.11 g/L), and methanol (1.2% (v/v)) were the optimum values leading to the production of 31.50 g/L citric acid. Afterward, optimum inhibitor concentrations (iodoacetic acid: 0.05 mM) were added to accumulate citric acid, resulting in maximum bio-production (40.12 g/L) of citric acid. The pulp density and leaching time effect on metals dissolution was investigated in enriched-citric acid spent medium. The suitable conditions were a pulp density of 70 g/L and a leaching duration of 6 days, which led to the highest dissolution of Mn (79%) and Li (90%). Based on the results of the TCLP tests, the bioleaching residue is non-hazardous, suitable for safe disposal, and does not pose an environmental threat. Moreover, nearly 98% of Mn was extracted from the bioleaching solution with oxalic acid at 1.2 M. XRD, and FE-SEM analyses were utilized for further bioleaching and precipitation mechanism analysis.
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Affiliation(s)
- Tannaz Naseri
- Biotechnology Group, Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran; Circular Resource Engineering and Management (CREM), Institute of Environmental Technology and Energy, Economics, Hamburg University of Technology, Blohmstr. 15, 21079, Hamburg, Germany
| | - Seyyed Mohammad Mousavi
- Biotechnology Group, Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran; Modares Environmental Research Institute, Tarbiat Modares University, Tehran, Iran.
| | - Andreas Liese
- Institute of Technical Biocatalysis, Hamburg University of Technology, Denickestr. 15, 21073 Hamburg, Germany
| | - Kerstin Kuchta
- Circular Resource Engineering and Management (CREM), Institute of Environmental Technology and Energy, Economics, Hamburg University of Technology, Blohmstr. 15, 21079, Hamburg, Germany
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2
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Bodnár V, Király A, Orosz E, Miskei M, Emri T, Karányi Z, Leiter É, de Vries RP, Pócsi I. Species-specific effects of the introduction of Aspergillus nidulans gfdB in osmophilic aspergilli. Appl Microbiol Biotechnol 2023; 107:2423-2436. [PMID: 36811707 PMCID: PMC10033484 DOI: 10.1007/s00253-023-12384-9] [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: 10/15/2022] [Revised: 01/09/2023] [Accepted: 01/11/2023] [Indexed: 02/24/2023]
Abstract
Industrial fungi need a strong environmental stress tolerance to ensure acceptable efficiency and yields. Previous studies shed light on the important role that Aspergillus nidulans gfdB, putatively encoding a NAD+-dependent glycerol-3-phosphate dehydrogenase, plays in the oxidative and cell wall integrity stress tolerance of this filamentous fungus model organism. The insertion of A. nidulans gfdB into the genome of Aspergillus glaucus strengthened the environmental stress tolerance of this xerophilic/osmophilic fungus, which may facilitate the involvement of this fungus in various industrial and environmental biotechnological processes. On the other hand, the transfer of A. nidulans gfdB to Aspergillus wentii, another promising industrial xerophilic/osmophilic fungus, resulted only in minor and sporadic improvement in environmental stress tolerance and meanwhile partially reversed osmophily. Because A. glaucus and A. wentii are phylogenetically closely related species and both fungi lack a gfdB ortholog, these results warn us that any disturbance of the stress response system of the aspergilli may elicit rather complex and even unforeseeable, species-specific physiological changes. This should be taken into consideration in any future targeted industrial strain development projects aiming at the fortification of the general stress tolerance of these fungi. KEY POINTS: • A. wentii c' gfdB strains showed minor and sporadic stress tolerance phenotypes. • The osmophily of A. wentii significantly decreased in the c' gfdB strains. • Insertion of gfdB caused species-specific phenotypes in A. wentii and A. glaucus.
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Affiliation(s)
- Veronika Bodnár
- Department of Molecular Biotechnology and Microbiology, Institute of Biotechnology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
- Doctoral School of Nutrition and Food Sciences, University of Debrecen, Debrecen, Hungary
| | - Anita Király
- Department of Molecular Biotechnology and Microbiology, Institute of Biotechnology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
| | - Erzsébet Orosz
- Department of Molecular Biotechnology and Microbiology, Institute of Biotechnology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
| | - Márton Miskei
- ELRN-UD Fungal Stress Biology Research Group, Debrecen, Hungary
| | - Tamás Emri
- Department of Molecular Biotechnology and Microbiology, Institute of Biotechnology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
- ELRN-UD Fungal Stress Biology Research Group, Debrecen, Hungary
| | - Zsolt Karányi
- Department of Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Éva Leiter
- Department of Molecular Biotechnology and Microbiology, Institute of Biotechnology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
- ELRN-UD Fungal Stress Biology Research Group, Debrecen, Hungary
| | - Ronald P de Vries
- Fungal Physiology, Westerdijk Fungal Biodiversity Institute & Fungal Molecular Physiology, Utrecht University, Utrecht, the Netherlands
| | - István Pócsi
- Department of Molecular Biotechnology and Microbiology, Institute of Biotechnology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary.
- ELRN-UD Fungal Stress Biology Research Group, Debrecen, Hungary.
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de Obeso Fernandez del Valle A, Scheckhuber CQ. Superoxide Dismutases in Eukaryotic Microorganisms: Four Case Studies. Antioxidants (Basel) 2022; 11:antiox11020188. [PMID: 35204070 PMCID: PMC8868140 DOI: 10.3390/antiox11020188] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/12/2022] [Accepted: 01/16/2022] [Indexed: 01/08/2023] Open
Abstract
Various components in the cell are responsible for maintaining physiological levels of reactive oxygen species (ROS). Several different enzymes exist that can convert or degrade ROS; among them are the superoxide dismutases (SODs). If left unchecked, ROS can cause damage that leads to pathology, can contribute to aging, and may, ultimately, cause death. SODs are responsible for converting superoxide anions to hydrogen peroxide by dismutation. Here we review the role of different SODs on the development and pathogenicity of various eukaryotic microorganisms relevant to human health. These include the fungal aging model, Podospora anserina; various members of the genus Aspergillus that can potentially cause aspergillosis; the agents of diseases such as Chagas and sleeping disease, Trypanosoma cruzi and Trypanosoma brucei, respectively; and, finally, pathogenic amoebae, such as Acanthamoeba spp. In these organisms, SODs fulfill essential and often regulatory functions that come into play during processes such as the development, host infection, propagation, and control of gene expression. We explore the contribution of SODs and their related factors in these microorganisms, which have an established role in health and disease.
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Huang H, Ding L, Lu J, Wang N, Cai M. Combinatorial strategies for production improvement of red pigments from Antarctic fungus Geomyces sp. J Food Sci 2020; 85:3061-3071. [PMID: 32895956 DOI: 10.1111/1750-3841.15443] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 08/04/2020] [Accepted: 08/11/2020] [Indexed: 11/30/2022]
Abstract
Natural red pigments have been widely used as food and cosmetics additives. However, due to toxic byproducts or allergen issues, it is still necessary to look for some other red pigment products. This study proposed combinatorial strategies to improve production of a new kind of red pigments from the fungus Geomyces WNF-15A, isolated from Antarctica. A high-production medium was developed by statistical experimental design, which was further simplified for industrial use by single-factor experiments. Strain breeding by atmospheric room temperature plasma mutagenesis generated a mutant, Geomyces sp. WNF-15A-M210, which increased production of red pigments by 24.4% and shortened culture phase by 33.3% comparing with the wild-type. The production of red pigments by this mutant favored a weak alkaline condition but required only mild dissolved oxygen tension. Control of initial pH 8.5 (process pH around 7.5) increased red pigments production by 19% comparing with natural condition. Precursor and inhibitor addition experiments indicated that the red pigments were synthesized by polyketide pathway, and feeding 6 mmol/L precursor of sodium acetate by three aliquots at days 3 to 5 improved biosynthesis of red pigments by 27%. Finally, the developed culture process was verified in a 5-L stirred tank bioreactor. The red pigments production of the pH regulation group reached 1.11-fold of the control and 1.95-fold of the precursor regulation group, respectively. This study provides high-production strain, optimized medium, and bioprocess for the possible industrial production of Antarctic Geomyces red pigments in future. PRACTICAL APPLICATION: Antarctic Geomyces red pigments showed high color value, nontoxic characteristic, and good water solubility. It holds potential for industrial use and is under development for food additive in China currently. This study provides an optional manufacturing process for this new kind of red pigments.
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Affiliation(s)
- Hezhou Huang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Lulu Ding
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Jian Lu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Nengfei Wang
- First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China
| | - Menghao Cai
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China.,Shanghai Collaborative Innovation Center for Biomanufacturing, Shanghai, China
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Abdel-Wahhab MA, El-Nekeety AA, Hathout AS, Salman AS, Abdel-Aziem SH, Sabry BA, Hassan NS, Abdel-Aziz MS, Aly SE, Jaswir I. Bioactive compounds from Aspergillus niger extract enhance the antioxidant activity and prevent the genotoxicity in aflatoxin B 1-treated rats. Toxicon 2020; 181:57-68. [PMID: 32353570 DOI: 10.1016/j.toxicon.2020.04.103] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 04/18/2020] [Accepted: 04/25/2020] [Indexed: 01/19/2023]
Abstract
This study aimed to identify the bioactive compounds of the ethyl acetate extract of Aspergillus niger SH2-EGY using GC-MS and to evaluate their protective role against aflatoxin B1 (AFB1)-induced oxidative stress, genotoxicity and cytotoxicity in rats. Six groups of male Sprague-Dawley rats were treated orally for 4 weeks included the control group, AFB1-treated group (80 μg/kg b.w); fungal extract (FE)-treated groups at low (140) or high dose (280) mg/kg b.w and the groups treated with AFB1 plus FE at the two tested doses. The GC-MS analysis identified 26 compounds. The major compounds found were 1,2,3,4,6-Penta-trimethylsilyl Glucopyranose, Fmoc-L-3-(2-Naphthyl)-alanine, D-(-)-Fructopyranose, pentakis (trimethylsilyl) ether, bis (2-ethylhexyl) phthalate, trimethylsilyl ether-glucitol, and octadecanamide, N-(2- methylpropyl)-N-nitroso. The in vivo results showed that AFB1 significantly increased serum ALT, AST, creatinine, uric acid, urea, cholesterol, triglycerides, LDL, carcinoembryonic antigen, alpha-fetoprotein, interleukin-6, Malondialdehyde, nitric oxide, Bax, caspase-3 and P53 mRNA expression, chromosomal aberrations and DNA fragmentation. It decreased serum TP, albumin, HDL, Bcl-2 mRNA expression, hepatic and renal TAC, SOD and GPx content and induced histological changes in the liver and kidney. FE prevented these disturbances in a dosage-dependent manner. It could be concluded that A. niger SH2-EGY extract is safe a promising agent for pharmaceutical and food industries.
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Affiliation(s)
- Mosaad A Abdel-Wahhab
- Food Toxicology & Contaminants Department, National Research Center, Dokki, Cairo, Egypt.
| | - Aziza A El-Nekeety
- Food Toxicology & Contaminants Department, National Research Center, Dokki, Cairo, Egypt
| | - Amal S Hathout
- Food Toxicology & Contaminants Department, National Research Center, Dokki, Cairo, Egypt
| | - Asmaa S Salman
- Genetic and Cytology Department, National Research Center, Dokki, Cairo, Egypt
| | | | - Bassem A Sabry
- Food Toxicology & Contaminants Department, National Research Center, Dokki, Cairo, Egypt
| | - Nabila S Hassan
- Pathology Department, National Research Center, Dokki, Cairo, Egypt
| | | | - Soher E Aly
- Food Toxicology & Contaminants Department, National Research Center, Dokki, Cairo, Egypt
| | - Irwandi Jaswir
- International Institute for Halal Research & Training (INHART), International Islamic University Malaysia, Gombak, Kuala Lumpur, Malaysia.
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Tan W, Zheng J, Guan J, Zhan X, Gao L, Lyu L, Shan B, Yang Q, Ma M, Xia Y. An efficient synthesis of 9‐anthrone lactone derivatives via the Knoevenagel condensation and intramolecular cyclization. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.3785] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Weiqiang Tan
- School of Environmental and Municipal EngineeringQingdao University of Technology Qingdao China
| | - Jifang Zheng
- School of Environmental and Municipal EngineeringQingdao University of Technology Qingdao China
| | - Jing Guan
- School of Environmental and Municipal EngineeringQingdao University of Technology Qingdao China
| | - Xiuzhi Zhan
- School of Environmental and Municipal EngineeringQingdao University of Technology Qingdao China
| | - Liming Gao
- School of Environmental and Municipal EngineeringQingdao University of Technology Qingdao China
| | - Lili Lyu
- School of Environmental and Municipal EngineeringQingdao University of Technology Qingdao China
| | - Bin Shan
- School of Environmental and Municipal EngineeringQingdao University of Technology Qingdao China
| | - Qipeng Yang
- School of Environmental and Municipal EngineeringQingdao University of Technology Qingdao China
| | - Mingliang Ma
- Research Institute of Functional Materials, School of Civil EngineeringQingdao University of Technology Qingdao China
| | - Yan Xia
- School of Environmental and Municipal EngineeringQingdao University of Technology Qingdao China
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and PharmacyOcean University of China Qingdao People's Republic of China
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7
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Wu H, Guo Y, Chen L, Chen G, Liang Z. A Novel Strategy to Regulate 1-Deoxynojirimycin Production Based on Its Biosynthetic Pathway in Streptomyces lavendulae. Front Microbiol 2019; 10:1968. [PMID: 31507573 PMCID: PMC6713920 DOI: 10.3389/fmicb.2019.01968] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Accepted: 08/09/2019] [Indexed: 12/14/2022] Open
Abstract
This study characterized the biosynthetic pathway of the secondary metabolite 1-deoxynojirimycin (DNJ) from Streptomyces lavendulae. The results revealed that glucose was a preferable precursor for DNJ synthesis, and its carbon skeleton underwent a C2-N-C6 cyclization reaction during synthesis. The biosynthetic pathway was related to the glycolysis pathway, and started from fructose-6-phosphate, and involved amination, dephosphorylation, oxidation, cyclization, dehydration, and reduction reaction steps, yielding DNJ. Then, based on clarified biosynthetic pathway information, precursors, analogs, and metabolism inhibitors were used as novel regulators to enhance the production of DNJ. The results demonstrated that the titer of DNJ could reach 296.56 mg/L, which was 3.3-fold higher than that of a control group (90 mg/L) when sodium citrate (0 h, 5 g/L), sorbose (0 h, 1 g/L), iodoacetic acid (20 h, 50 mg/L), and glucose (26 h, 7 g/L) were added during the fermentation process. This study provides a new understanding of the biosynthetic pathway of DNJ, and also provides an efficient strategy to regulate the production of DNJ based on this biosynthetic pathway, which is a new perspective for the regulation of other secondary metabolites.
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Affiliation(s)
- Hao Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Microorganisms and Enzyme Research Center of Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, China
| | - Ye Guo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Microorganisms and Enzyme Research Center of Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, China
| | - Lei Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Microorganisms and Enzyme Research Center of Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, China
| | - Guiguang Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Microorganisms and Enzyme Research Center of Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, China
| | - Zhiqun Liang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Microorganisms and Enzyme Research Center of Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, China
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8
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Qiao L, Duan Z, Chen Y, Luan Y, Gu Q, Liu YK, Li D. Aspergiolides A and B: Core Structural Establishment and Synthesis of Structural Analogues. J Org Chem 2019; 84:4451-4457. [PMID: 30865441 DOI: 10.1021/acs.joc.8b03185] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The core structure of marine natural products aspergiolides A (1a) and B (1b) was achieved via a concise, two-step procedure with satisfactory yield. Based on this protocol, a natural products mimic library containing 25 structural simplified analogues of 1a was then constructed. Several prepared analogues showed potential cytotoxic activity against five different tumor cell lines, and compound 7bb, in particular, exhibited cytotoxicity comparable to that of 1a.
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Affiliation(s)
- Liang Qiao
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy , Ocean University of China , Qingdao 266003 , P.R. China
| | - Zhongwei Duan
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy , Ocean University of China , Qingdao 266003 , P.R. China
| | - Yinghan Chen
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy , Ocean University of China , Qingdao 266003 , P.R. China
| | - Yepeng Luan
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy , Ocean University of China , Qingdao 266003 , P.R. China
| | - Qianqun Gu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy , Ocean University of China , Qingdao 266003 , P.R. China
| | - Yan-Kai Liu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy , Ocean University of China , Qingdao 266003 , P.R. China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology , Qingdao 266237 , P.R. China
| | - Dehai Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy , Ocean University of China , Qingdao 266003 , P.R. China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology , Qingdao 266237 , P.R. China.,Open Studio for Druggability Research of Marine Natural Products , Pilot National Laboratory for Marine Science and Technology , Qingdao 266237 , P.R. China
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9
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Co-addition Strategy for Enhancement of Chaetominine from Submerged Fermentation of Aspergillus fumigatus CY018. Appl Biochem Biotechnol 2018; 186:384-399. [DOI: 10.1007/s12010-018-2714-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 02/06/2018] [Indexed: 01/12/2023]
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10
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Polyphasic taxonomy of Aspergillus section Aspergillus (formerly Eurotium), and its occurrence in indoor environments and food. Stud Mycol 2017; 88:37-135. [PMID: 28860671 PMCID: PMC5573881 DOI: 10.1016/j.simyco.2017.07.001] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Aspergillus section Aspergillus (formerly the genus Eurotium) includes xerophilic species with uniseriate conidiophores, globose to subglobose vesicles, green conidia and yellow, thin walled eurotium-like ascomata with hyaline, lenticular ascospores. In the present study, a polyphasic approach using morphological characters, extrolites, physiological characters and phylogeny was applied to investigate the taxonomy of this section. Over 500 strains from various culture collections and new isolates obtained from indoor environments and a wide range of substrates all over the world were identified using calmodulin gene sequencing. Of these, 163 isolates were subjected to molecular phylogenetic analyses using sequences of ITS rDNA, partial β-tubulin (BenA), calmodulin (CaM) and RNA polymerase II second largest subunit (RPB2) genes. Colony characteristics were documented on eight cultivation media, growth parameters at three incubation temperatures were recorded and micromorphology was examined using light microscopy as well as scanning electron microscopy to illustrate and characterize each species. Many specific extrolites were extracted and identified from cultures, including echinulins, epiheveadrides, auroglaucins and anthraquinone bisanthrons, and to be consistent in strains of nearly all species. Other extrolites are species-specific, and thus valuable for identification. Several extrolites show antioxidant effects, which may be nutritionally beneficial in food and beverages. Important mycotoxins in the strict sense, such as sterigmatocystin, aflatoxins, ochratoxins, citrinin were not detected despite previous reports on their production in this section. Adopting a polyphasic approach, 31 species are recognized, including nine new species. ITS is highly conserved in this section and does not distinguish species. All species can be differentiated using CaM or RPB2 sequences. For BenA, Aspergillus brunneus and A. niveoglaucus share identical sequences. Ascospores and conidia morphology, growth rates at different temperatures are most useful characters for phenotypic species identification.
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Key Words
- A. aurantiacoflavus Hubka, A.J. Chen, Jurjević & Samson
- A. caperatus A.J. Chen, Frisvad & Samson
- A. endophyticus Hubka, A.J. Chen, & Samson
- A. levisporus Hubka, A.J. Chen, Jurjević & Samson
- A. porosus A.J. Chen, Frisvad & Samson
- A. tamarindosoli A.J. Chen, Frisvad & Samson
- A. teporis A.J. Chen, Frisvad & Samson
- A. zutongqii A.J. Chen, Frisvad & Samson
- Ascomycota
- Aspergillaceae
- Aspergillus aerius A.J. Chen, Frisvad & Samson
- Aspergillus proliferans
- Eurotiales
- Eurotium amstelodami
- Extrolites
- Multi-gene phylogeny
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Regulation of the Docosapentaenoic Acid/Docosahexaenoic Acid Ratio (DPA/DHA Ratio) in Schizochytrium limacinum B4D1. Appl Biochem Biotechnol 2016; 182:67-81. [DOI: 10.1007/s12010-016-2311-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Accepted: 10/30/2016] [Indexed: 12/30/2022]
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12
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Designing novel glucose/ornithine replenishment strategies by biosynthetic and bioprocess analysis to improve fibrinolytic FGFC1 production by the marine fungus Stachybotrys longispora. Process Biochem 2015. [DOI: 10.1016/j.procbio.2015.09.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Tan YY, Hsu WH, Shih TW, Lin CH, Pan TM. Proteomic insight into the effect of ethanol on citrinin biosynthesis pathway in Monascus purpureus NTU 568. Food Res Int 2014; 64:733-742. [DOI: 10.1016/j.foodres.2014.08.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2014] [Revised: 07/30/2014] [Accepted: 08/14/2014] [Indexed: 01/07/2023]
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14
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Sun L, Ren L, Zhuang X, Ji X, Yan J, Huang H. Differential effects of nutrient limitations on biochemical constituents and docosahexaenoic acid production of Schizochytrium sp. BIORESOURCE TECHNOLOGY 2014; 159:199-206. [PMID: 24657750 DOI: 10.1016/j.biortech.2014.02.106] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 02/22/2014] [Accepted: 02/24/2014] [Indexed: 05/27/2023]
Abstract
Four nutrient limitation cultures, namely monosodium glutamate (MSG-L), phosphate (P-L), ammonium sulfate (NH4(+)-L) and double (D-L, MSG and P limitation) limited, were designed to study how cell growth and biochemical components of Schizochytrium sp. were affected by nutrient limitations. All limited conditions caused decrease in biomass especially MSG-L and D-L conditions. MSG-L condition attained the highest lipid yield of 30.73 g/l but the lowest protein content. P-L condition shortened the fermentation time and obtained the highest DHA productivity of 291 mg/lh. D-L condition was the most cost-effective fermentation condition which gained the highest input-output ratio. NH4(+)-L condition got the highest squalene and DHA content in lipids. Meanwhile, nitrogen limited conditions promoted the accumulation of neutral lipids. All limited conditions benefit the PUFAs accumulation in the neutral lipids. In addition, the existence of NH4(+) or the absence of MSG and phosphate reduced the unsaponifiable matters content in lipid.
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Affiliation(s)
- Lina Sun
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, No. 5 Xinmofan Road, Nanjing 210009, People's Republic of China
| | - Lujing Ren
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, No. 5 Xinmofan Road, Nanjing 210009, People's Republic of China.
| | - Xiaoyan Zhuang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, No. 5 Xinmofan Road, Nanjing 210009, People's Republic of China
| | - Xiaojun Ji
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, No. 5 Xinmofan Road, Nanjing 210009, People's Republic of China
| | - Jiacheng Yan
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, No. 5 Xinmofan Road, Nanjing 210009, People's Republic of China
| | - He Huang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, No. 5 Xinmofan Road, Nanjing 210009, People's Republic of China.
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15
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Zhang G, Wu G, Zhu T, Kurtán T, Mándi A, Jiao J, Li J, Qi X, Gu Q, Li D. Meroterpenoids with diverse ring systems from the sponge-associated fungus Alternaria sp. JJY-32. JOURNAL OF NATURAL PRODUCTS 2013; 76:1946-1957. [PMID: 24128115 DOI: 10.1021/np4005757] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Fifteen meroterpenoids (1-15) with diverse ring systems including an unprecedented oxaspiro[5.5]nonane-fused cyclohexenone (1), hydrogenated benzofurans (2-5), hydrogenated chromans (6, 7), hydrogenated cyclopenta[b]chromans (8-11), and four monocyclic structures (12-15) were isolated from the sponge-associated fungus Alternaria sp. JJY-32. The structures were elucidated by detailed spectroscopic analysis, including 2D NMR and electronic circular dichroism (ECD) calculations, and assisted by chemical derivatizations. On the basis of supplementation experiments with specific enzyme inhibitors and putative precursors, a shikimate-isoprenoid hybrid biosynthetic pathway is proposed. The NF-κB inhibitory activities of 1-15 were tested, and all of them, except 6 and 7 (IC50 > 100 μM), showed activities with IC50 values ranging from 39 to 85 μM in RAW264.7 cells.
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Affiliation(s)
- Guojian Zhang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China , Qingdao 266003, People's Republic of China
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16
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Zhang XY, Bao J, Zhong J, Xu XY, Nong XH, Qi SH. Enhanced production of a novel cytotoxic chromone oxalicumone A by marine-derived mutant Penicillium oxalicum SCSIO 24-2. Appl Microbiol Biotechnol 2013; 97:9657-63. [PMID: 24061416 DOI: 10.1007/s00253-013-5203-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2013] [Revised: 08/12/2013] [Accepted: 08/14/2013] [Indexed: 12/19/2022]
Abstract
Many marine natural products hold great potential for the development of new and much needed drugs. However, the production of active metabolites by marine-derived microorganisms is usually very low, and large-scale culture has to be involved to meet the need of chemical structural modification and deep pharmacy study. In order to enhance the production of a novel cytotoxic sulfur-containing chromone oxalicumone A (OA), germinating spores of a marine-derived wild strain Penicillium oxalicum SCSGAF 0023 were mutated by microwave and ultraviolet light irradiation, which led to the obtainment of a mutant P. oxalicum SCSIO 24-2 that could produce fivefold increase in OA production (3.42 ± 0.21 mg/l) as compared to the wild strain. This is the first report that germinating spores are applied in marine-derived Penicillium sp. mutating to enhance the production of OA. Further, Plackett-Burman design and central composite design were adopted to optimize the basic medium components for increasing OA production by the mutant SCSIO 24-2 in shake flasks. The results indicated that three medium components including mannitol, maltose, and L-cysteine had significant effects on OA production, and their concentrations were optimized as 36, 27.9, and 0.99 g/l, respectively. In the optimized medium, the OA production (18.31 ± 0.27 mg/l) by mutant SCSIO 24-2 was 4.4-fold higher than that in the basic medium. These results of this work promise to improve the present production of OA and may be adopted to enhance other objective products' production by marine-derived fungi.
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Affiliation(s)
- Xiao-Yong Zhang
- Key Laboratory of Tropical Marine Bio-resources and Ecology/RNAM Center for Marine Microbiology/Guangdong Key Laboratory of Marine Material Medical, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou, 510301, China
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17
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Yin Y, Xu B, Li Z, Zhang B. Enhanced production of (+)-terrein in fed-batch cultivation of Aspergillus terreus strain PF26 with sodium citrate. World J Microbiol Biotechnol 2012; 29:441-6. [DOI: 10.1007/s11274-012-1196-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Accepted: 10/15/2012] [Indexed: 10/27/2022]
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18
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Cai M, Zhou X, Lu J, Fan W, Niu C, Zhou J, Sun X, Kang L, Zhang Y. Enhancing aspergiolide A production from a shear-sensitive and easy-foaming marine-derived filamentous fungus Aspergillus glaucus by oxygen carrier addition and impeller combination in a bioreactor. BIORESOURCE TECHNOLOGY 2011; 102:3584-3586. [PMID: 21074418 DOI: 10.1016/j.biortech.2010.10.052] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2010] [Revised: 10/09/2010] [Accepted: 10/11/2010] [Indexed: 05/30/2023]
Abstract
Production enhancement of a novel antitumor compound aspergiolide A from shear-sensitive and easy-foaming marine-derived fungus Aspergillus glaucus HB1-19 in a 5-l stirred bioreactor was investigated. Two types of impellers, i.e., six-flat-blade disc turbine impeller (DT) and three-sector-blade pitched blade turbine impeller (PB) were used in this work. In cultures with fermentation medium, the combination of upper PB and lower DT led to the maximum dry biomass (13.8 g/l) and aspergiolide A production (19.3 mg/l). However, two PBs brought the highest aspergiolide A yield coefficient (1.9 mg/g dry biomass) despite it produced the lowest dry biomass (5.3 g/l). By contrast, two DTs and the upper DT and lower PB showed insignificant results. Feeding 0.35% (v/v) n-dodecane in cultures with upper PB and lower DT further improved aspergiolide A production by 31.0%, i.e., 25.3 mg/l, which is also 322% higher than that in the ordinary cultures with two DTs.
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Affiliation(s)
- Menghao Cai
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
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19
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Blunt JW, Copp BR, Munro MHG, Northcote PT, Prinsep MR. Marine natural products. Nat Prod Rep 2010; 28:196-268. [PMID: 21152619 DOI: 10.1039/c005001f] [Citation(s) in RCA: 343] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
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20
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Cai M, Zhou X, Zhou J, Niu C, Kang L, Sun X, Zhang Y. Efficient strategy for enhancing aspergiolide A production by citrate feedings and its effects on sexual development and growth of marine-derived fungus Aspergillus glaucus. BIORESOURCE TECHNOLOGY 2010; 101:6059-6068. [PMID: 20359887 DOI: 10.1016/j.biortech.2010.03.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2009] [Revised: 02/27/2010] [Accepted: 03/03/2010] [Indexed: 05/29/2023]
Abstract
Aspergiolide A production enhancement by citrate and its effects on growth and sexual development of marine-derived fungus Aspergillus glaucus HB1-19 were investigated. In agar plate culture, 15 mM citric acid decreased colony radial growth and aspergiolide A production by 31.5% and 23.0%, respectively. It also improved sexual cleistothecium formation by 360% but depressed asexual conidiospore generation by 84.8%. In submerged culture, adding 40 mM citric acid finally promoted aspergiolide A production by 80.0%, which accompanied with 16.7% increase of biomass and 10.0% enhancement of sugar utilization. Differently, sodium citrate made no obvious or even opposite effects. Citrate and low pH could significantly improve pyruvate accumulation but inhibit succinate and fumarate production. Moreover, low pH was favorable to citrate utilization. Organic acids changes were closely related to aspergiolide A biosynthesis. Comparing to pH controls, effects of citric acid comprised pH decrease solicitation and citrate utilization enhancement.
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Affiliation(s)
- Menghao Cai
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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21
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Abstract
Marine bacteria and fungi are of considerable importance as new promising sources of a huge number of biologically active products. Some of these marine species live in a stressful habitat, under cold, lightless and high pressure conditions. Surprisingly, a large number of species with high diversity survive under such conditions and produce fascinating and structurally complex natural products. Up till now, only a small number of microorganisms have been investigated for bioactive metabolites, yet a huge number of active substances with some of them featuring unique structural skeletons have been isolated. This review covers new biologically active natural products published recently (2007-09) and highlights the chemical potential of marine microorganisms, with focus on bioactive products as well as on their mechanisms of action.
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Affiliation(s)
- Abdessamad Debbab
- Institut für Pharmazeutische Biologie und Biotechnologie, Heinrich-Heine Universitaet Duesseldorf, Germany
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22
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Liu WC, Li CQ, Zhu P, Yang JL, Cheng KD. Phylogenetic diversity of culturable fungi associated with two marine sponges: Haliclona simulans and Gelliodes carnosa, collected from the Hainan Island coastal waters of the South China Sea. FUNGAL DIVERS 2010. [DOI: 10.1007/s13225-010-0022-8] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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