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Lv JH, Yao L, Li SY, Ye MY, Li D, Li CT, Li Y. Three new griseofulvin derivatives from Aureobasidium pullulans. Nat Prod Res 2024:1-6. [PMID: 38329014 DOI: 10.1080/14786419.2024.2312428] [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: 10/27/2023] [Accepted: 01/23/2024] [Indexed: 02/09/2024]
Abstract
Three new griseofulvin derivatives, griseofulvinoside A-C (1-3), were isolated from the ethyl acetate extract of the solid fermentation product of Aureobasidium pullulans. Their structures were elucidated based on extensive spectroscopic data analysis of MS, 1D and 2D NMR. The antifungal activities of new compounds were evaluated against four phytopathogenic fungi in vitro, and all test compounds demonstrated inhibitory effects. Among them, compound 2 exhibited the most potent activities against the four selected phytopathogenic fungi with inhibitory rates ranging from 40.2 to 75.8% at 0.2 mg/mL.
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Affiliation(s)
- Jian-Hua Lv
- Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, Jilin Agricultural University, Changchun, PR China
- College of Life Sciences, Hebei Normal University, Shijiazhuang, PR China
| | - Lan Yao
- Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, Jilin Agricultural University, Changchun, PR China
- Institute of Biology, Hebei Academy of Science, Shijiazhuang, PR China
| | - Shi-Yu Li
- Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, Jilin Agricultural University, Changchun, PR China
| | - Ming-Yu Ye
- Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, Jilin Agricultural University, Changchun, PR China
| | - Dan Li
- Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, Jilin Agricultural University, Changchun, PR China
| | - Chang-Tian Li
- Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, Jilin Agricultural University, Changchun, PR China
| | - Yu Li
- Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, Jilin Agricultural University, Changchun, PR China
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Zeng N, Zhang N, Ma X, Wang Y, Zhang Y, Wang D, Pu F, Li B. Transcriptomics Integrated with Metabolomics: Assessing the Central Metabolism of Different Cells after Cell Differentiation in Aureobasidium pullulans NG. J Fungi (Basel) 2022; 8:jof8080882. [PMID: 36012870 PMCID: PMC9410427 DOI: 10.3390/jof8080882] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 08/15/2022] [Accepted: 08/19/2022] [Indexed: 11/16/2022] Open
Abstract
When organisms are stimulated by external stresses, oxidative stress is induced, resulting in the production of large amounts of reactive oxygen species (ROS) that inhibit cell growth and accelerate cellular aging until death. Understanding the molecular mechanisms of abiotic stress is important to enhance cellular resistance, and Aureobasidium pullulans, a highly resistant yeast-like fungus, can use cellular differentiation to resist environmental stress. Here, swollen cells (SCs) from two different differentiation periods in Aureobasidium pullulans NG showed significantly higher antioxidant capacity and stress defense capacity than yeast-like cells (YL). The transcriptome and the metabolome of both cells were analyzed, and the results showed that amino acid metabolism, carbohydrate metabolism, and lipid metabolism were significantly enriched in SCs. Glyoxylate metabolism was significantly upregulated in carbohydrate metabolism, replacing the metabolic hub of the citric acid (TCA) cycle, helping to coordinate multiple metabolic pathways and playing an important role in the resistance of Aureobasidium pullulans NG to environmental stress. Finally, we obtained 10 key genes and two key metabolites in SCs, which provide valuable clues for subsequent validation. In conclusion, these results provide valuable information for assessing central metabolism-mediating oxidative stress in Aureobasidium pullulans NG, and also provide new ideas for exploring the pathways of eukaryotic resistance to abiotic stress.
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Affiliation(s)
- Nan Zeng
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang 110866, China
| | - Ning Zhang
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang 110866, China
- Correspondence: (N.Z.); (B.L.)
| | - Xin Ma
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang 110866, China
| | - Yunjiao Wang
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang 110866, China
| | - Yating Zhang
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang 110866, China
| | - Dandan Wang
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang 110866, China
| | - Fangxiong Pu
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang 110866, China
| | - Bingxue Li
- College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China
- Correspondence: (N.Z.); (B.L.)
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Yuzbasioglu D, Mamur S, Avuloglu-Yilmaz E, Erikel E, Celebi-Keskin A, Unal F. Evaluation of the genotoxic and antigenotoxic effects of exopolysaccharide pullulan in human lymphocytes in vitro. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2021; 870-871:503391. [PMID: 34583820 DOI: 10.1016/j.mrgentox.2021.503391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 08/05/2021] [Accepted: 08/09/2021] [Indexed: 10/20/2022]
Abstract
Pullulan is a biocompatible and water-soluble exo-polysaccharide produced by primary strains of the fungus Aureobasidium pullulans. It is frequently used in the pharmaceutical and food industries. In this study, possible cytotoxic effect of pullulan was assessed using the MTT assay in the human breast cancer (MCF-7) cell line. Micronucleus (MN), micronucleus-FISH (MN-FISH), random amplified polymorphic DNA (RAPD-PCR), and comet assays were used to investigate genotoxic and antigenotoxic effects of pullulan against mitomycin C (MMC) (at MN assay) and hydrogen peroxide (at comet assay) in human lymphocytes. Antigenotoxicity was determined using two different applications: 1 h pretreatment and simultaneous treatment. In the MTT assay, pullulan significantly reduced the cell viability at 15.6-2000 μg/mL compared to the control. No significant alterations in MN rates were found in human lymphocytes treated with different concentrations of pullulan compared to the control. In contrast, co-treatment of pullulan and MMC decreased the frequency of MN in almost all the treatment concentrations and durations compared to the MMC. No significant change was observed in the frequency of the centromere-positive C + or negative C- MNi compared to the positive control. In comet assay, pullulan did not affect comet tail intensity compared to the negative control. On the contrary, pullulan in combination with H2O2 significantly decreased tail intensity at almost all the concentrations compared to the positive control. The changes occurring in RAPD-PCR profiles following pullulan treatments included an increase or decrease in band intensity and gain or loss of bands. These results indicate that exopolysaccharide Pullulan is not genotoxic; moreover, it possesses a protective effect against MMC and H2O2 induced genotoxicity. In breast cancer cells, pullulan induced cytotoxic/anti-proliferative effect.
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Affiliation(s)
- Deniz Yuzbasioglu
- Genetic Toxicology Laboratory, Department of Biology, Faculty of Science, Gazi University, Ankara, Turkey.
| | - Sevcan Mamur
- Life Sciences Application and Research Center, Gazi University, Ankara, Turkey
| | | | - Esra Erikel
- Genetic Toxicology Laboratory, Department of Biology, Faculty of Science, Gazi University, Ankara, Turkey
| | - Ayten Celebi-Keskin
- Department of Bioengineering, Faculty of Engineering and Architecture, Kırıkkale University, Kırıkkale, Turkey
| | - Fatma Unal
- Genetic Toxicology Laboratory, Department of Biology, Faculty of Science, Gazi University, Ankara, Turkey
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Lu Y, Liu G, Jiang H, Chi Z, Chi Z. An insight into the iron acquisition and homeostasis in Aureobasidium melanogenum HN6.2 strain through genome mining and transcriptome analysis. Funct Integr Genomics 2018; 19:137-150. [PMID: 30251029 DOI: 10.1007/s10142-018-0633-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 08/07/2018] [Accepted: 08/23/2018] [Indexed: 11/26/2022]
Abstract
Aureobasidium melanogenum HN6.2 is a unique yeast strain who can produce the siderophore of fusigen under iron starvation to guarantee its survival. However, a comprehensive understanding of mechanisms involved in iron acquisition and homeostasis for it is still vacant. In this study, genome sequencing and mining revealed that A. melanogenum HN6.2 strain was the first yeast species that exclusively possessed all the four known mechanisms for the iron acquisition: (i) the siderophore-mediated iron uptake; (ii) reductive iron assimilation; (iii) low-affinity ferrous uptake; and (iv) heme utilization, which suggested its stronger adaptability than Aspergillus fumigatus and Saccharomyces cerevisiae. This HN6.2 strain also employed the vacuolar iron storage for immobilizing the excessive iron to avoid its cellular toxicity. Specially, genome mining indicated that A. melanogenum HN6.2 strain could also synthesize ferricrocin siderophore. Further HPLC and Q-Tof-MS analysis confirmed that the siderophores synthesized by this strain consisted of cyclic fusigen, linear fusigen, ferricrocin, and hydroxyferricrocin and they played parallel roles as both intracellular and extracellular siderophores. Also, the heme utilization for this strain was experimentally verified by the knock-out of heme oxygenase gene. For iron homeostasis, the transcriptome analysis revealed that this strain mainly employed two central regulators of SreA/HapX to tune iron uptake and storage at the transcriptional level. It was also noted that mitogen-activated protein kinase C gene (MpkC) exhibited a transcriptional up-regulation under iron sufficiency, suggesting that it may serve as another factor involved in the repression of siderophore biosynthesis. This is the first genetic blueprint of iron acquisition and homeostasis for A. melanogenum.
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Affiliation(s)
- Yi Lu
- College of Marine Life Science, Ocean University of China, Qingdao, 266003, China
| | - Guanglei Liu
- College of Marine Life Science, Ocean University of China, Qingdao, 266003, China
| | - Hong Jiang
- College of Marine Life Science, Ocean University of China, Qingdao, 266003, China
| | - Zhenming Chi
- College of Marine Life Science, Ocean University of China, Qingdao, 266003, China
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao, 266003, China
| | - Zhe Chi
- College of Marine Life Science, Ocean University of China, Qingdao, 266003, China.
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Yang J, Yang W, Feng J, Chen J, Jiang M, Zou X. Enhanced polymalic acid production from the glyoxylate shunt pathway under exogenous alcohol stress. J Biotechnol 2018; 275:24-30. [PMID: 29621553 DOI: 10.1016/j.jbiotec.2018.04.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2017] [Revised: 02/25/2018] [Accepted: 04/01/2018] [Indexed: 01/14/2023]
Abstract
Polymalic acid (PMA) is a water-soluble biopolymer produced by the yeast-like fungus Aureobasidium pullulans. In this study, the physiological response of A. pullulans against exogenous alcohols stress was investigated. Interestingly, ethanol stress was an effective inducer of enhanced PMA yield, although cell growth was slightly inhibited. The stress-responsive gene malate synthase (mls), which is involved in the glyoxylate shunt, was identified and was found to be regulated by exogenous ethanol stress. Therefore, an engineered strain, YJ-MLS, was constructed by overexpressing the endogenous mls gene, which increased the PMA titer by 16.2% compared with the wild-type strain. Following addition of 1% (v/v) of ethanol, a high PMA titer of 40.0 ± 0.38 g/L was obtained using batch fermentation with the mutant YJ-MLS in a 5-L fermentor, with a strongest PMA productivity of 0.56 g/L h. This study was the interesting report to show strengthening of the carbon metabolic flow from the glyoxylate shunt for PMA synthesis, and also provided a new sight for re-recognizing the regulatory behavior of alcohol stress in eukaryotic microbes.
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Affiliation(s)
- Jing Yang
- College of Pharmaceutical Sciences, Chongqing Engineering Research Center for Pharmaceutical Process and Quality Control, Southwest University, Chongqing 400715, PR China
| | - Wenwen Yang
- College of Pharmaceutical Sciences, Chongqing Engineering Research Center for Pharmaceutical Process and Quality Control, Southwest University, Chongqing 400715, PR China
| | - Jun Feng
- College of Pharmaceutical Sciences, Chongqing Engineering Research Center for Pharmaceutical Process and Quality Control, Southwest University, Chongqing 400715, PR China
| | - Jie Chen
- Wuhan Sunhy Biology Co., Ltd, Wuhan 430074, PR China; School of Chemical Engineering& Pharmacy, Wuhan Institute of Technology, Wuhan 430205, PR China
| | - Min Jiang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, PR China
| | - Xiang Zou
- College of Pharmaceutical Sciences, Chongqing Engineering Research Center for Pharmaceutical Process and Quality Control, Southwest University, Chongqing 400715, PR China.
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