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Kausar MA, Parveen S, Anwar S, Sadaf, Massey S, El-Horany HES, Khan FH, Shahein M, Husain SA. Cytotoxic potential and metabolomic profiling of alkaloid rich fraction of Tylophora indica leaves. Biochim Biophys Acta Mol Cell Biol Lipids 2024; 1869:159505. [PMID: 38729236 DOI: 10.1016/j.bbalip.2024.159505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 03/28/2024] [Accepted: 05/07/2024] [Indexed: 05/12/2024]
Abstract
Tylophora indica (Burm f.) Merrill, belong to family Asclepiadaceae, is considered to be a natural remedy with high medicinal benefits. The objective of this work is to assess the metabolomic profile of T. indica leaves enriched in alkaloids, as well as to evaluate the in vitro cytotoxicity of these leaves using the MTT assay on human breast MCF-7 and liver HepG2 cancer cell lines. Dried leaves of T. indica were extracted by sonication, using methanol containing 2 % (v/v) of acetic acid and obtained fraction was characterized by HPTLC and UPLC-MS. The UPLC-MS study yielded a preliminary identification of 32 metabolites, with tylophorine, tylophorine B, tylophorinine, and tylophorinidine being the predominant metabolites. The cytotoxicity of the extract of T. indica was evaluated on HepG2 and MCF-7 cell lines, yielding inhibitory concentration (IC50) values of 75.71 μg/mL and 69.60 μg/mL, respectively. Data suggested that the phytochemical screening clearly showed presence of numerous secondary metabolites with moderate cytotoxic efficacy. In conclusion, the future prospects of T. indica appear promising for the advancement of phytopharmaceutical-based anticancer medications, as well as for the design of contemporary pharmaceuticals in the field of cancer chemotherapy.
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Affiliation(s)
- Mohd Adnan Kausar
- Department of Biochemistry, College of Medicine, University of Ha'il, Hail 81411, Saudi Arabia; Medical and Diagnostic Research Centre, University of Ha'il, Hail 55473, Saudi Arabia.
| | - Shabana Parveen
- Department of Biosciences, Jamia Millia Islamia, Okhla, New Delhi 110025, India.
| | - Sadaf Anwar
- Department of Biochemistry, College of Medicine, University of Ha'il, Hail 81411, Saudi Arabia; Medical and Diagnostic Research Centre, University of Ha'il, Hail 55473, Saudi Arabia.
| | - Sadaf
- Department of Biotechnology, Jamia Millia Islamia, Okhla, New Delhi 110025, India
| | - Sheersh Massey
- Department of Biosciences, Jamia Millia Islamia, Okhla, New Delhi 110025, India.
| | - Hemat El-Sayed El-Horany
- Department of Biochemistry, College of Medicine, University of Ha'il, Hail 81411, Saudi Arabia; Medical and Diagnostic Research Centre, University of Ha'il, Hail 55473, Saudi Arabia; Medical Biochemistry Department, Faculty of Medicine, Tanta University, Egypt.
| | - Farida Habib Khan
- Medical and Diagnostic Research Centre, University of Ha'il, Hail 55473, Saudi Arabia; Department of Community and Family Medicine, College of Medicine, University of Ha'il, Hail 81411, Saudi Arabia.
| | - Mona Shahein
- Department of Pediatrics, College of Medicine, University of Ha'il, Hail 81411, Saudi Arabia
| | - Syed Akhtar Husain
- Department of Biosciences, Jamia Millia Islamia, Okhla, New Delhi 110025, India.
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Kuang M, Peng WW, Huang YT, Li MF, Qin SY, Zheng YT, Xu L, Huang Q, Zou ZX. Two new chromone derivatives from the rhizosphere soil fungus Ilyonectria robusta. Nat Prod Res 2024; 38:1398-1405. [PMID: 36408983 DOI: 10.1080/14786419.2022.2147169] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 10/29/2022] [Accepted: 11/07/2022] [Indexed: 11/23/2022]
Abstract
Two new chromone derivatives (1 and 2), and two known compounds (3 and 4) were isolated from the rhizosphere soil fungus Ilyonectria robusta. Their planar structures and absolute configurations were determined by extensive spectroscopic analysis and electronic circular dichroism (ECD) calculations. Additionally, all the isolated compounds were evaluated for their antibacterial activity against Staphylococcus aureus, Enterococcus faecalis, Pseudomonas aeruginosa and Escherichia coli, but no obvious activity was observed at a concentration of 128 μg/mL.
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Affiliation(s)
- Min Kuang
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, P.R. China
- Hunan Key Laboratory of Diagnostic and Therapeutic Drug Research for Chronic Diseases, Central South University, Changsha, P.R. China
| | - Wei-Wei Peng
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, P.R. China
- Hunan Key Laboratory of Diagnostic and Therapeutic Drug Research for Chronic Diseases, Central South University, Changsha, P.R. China
| | - Yuan-Tao Huang
- Affiliated Haikou Hospital of Xiangya School of Medicine, Central South University, Haikou, P.R. China
| | - Mei-Fang Li
- Affiliated Haikou Hospital of Xiangya School of Medicine, Central South University, Haikou, P.R. China
| | - Si-Yu Qin
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, P.R. China
- Hunan Key Laboratory of Diagnostic and Therapeutic Drug Research for Chronic Diseases, Central South University, Changsha, P.R. China
| | - Yu-Ting Zheng
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, P.R. China
- Hunan Key Laboratory of Diagnostic and Therapeutic Drug Research for Chronic Diseases, Central South University, Changsha, P.R. China
| | - Li Xu
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, P.R. China
- Hunan Key Laboratory of Diagnostic and Therapeutic Drug Research for Chronic Diseases, Central South University, Changsha, P.R. China
| | - Qi Huang
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, P.R. China
- Hunan Key Laboratory of Diagnostic and Therapeutic Drug Research for Chronic Diseases, Central South University, Changsha, P.R. China
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, P.R. China
| | - Zhen-Xing Zou
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, P.R. China
- Hunan Key Laboratory of Diagnostic and Therapeutic Drug Research for Chronic Diseases, Central South University, Changsha, P.R. China
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3
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Radzikowski D, Kalińska A, Kot M, Jaworski S, Wierzbicki M, Gołębiewski M. In Vitro Evaluation of the Antimicrobial Properties of Nanoparticles as New Agents Used in Teat Sealants for Mastitis Prevention in Dry Cows. Biomedicines 2023; 11:2291. [PMID: 37626787 PMCID: PMC10452312 DOI: 10.3390/biomedicines11082291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 08/07/2023] [Accepted: 08/16/2023] [Indexed: 08/27/2023] Open
Abstract
Mastitis prevention and treatment in dry cows are complex issues with limited solutions. The most common is intramammary antibiotic treatment. However, the effectiveness of this treatment varies among countries and even within herds in the same region. Therefore, it is necessary to develop new strategies for dry cow therapy. Metal nanoparticles (NPs), which have strong biocidal properties for treating diseases caused by bacteria, fungi, and algae, are increasingly used to reduce antibiotic use. In this study, AuNPs, CuNPs, AgNPs, PtNPs, NP-FeCs, and their triple complexes were used at different concentrations to evaluate their practical use in treating cows during their dry period. The nanoparticles were in hydrocolloid form and were added separately to form a mixture with beeswax, a mixture with oil, or a mixture based on vegetable glycerin and propylene glycol. The NPs' concentrations were 0.5, 1, 2, and 5 ppm. Gram-positive and Gram-negative bacteria, and fungi isolated from cows diagnosed with mastitis were used to determine pathogen viability. The results indicated that AuNPs, CuNPs, AgNPs, and their complexes show biocidal properties against mastitis pathogens. AgNPs at 5 ppm had the strongest biocidal properties and reduced Streptococcus agalactiae's survival rate by 50%; however, the nanoparticle complexes showed poor synergism. The strongest biocidal properties of NPs in wax and in glycerin mixed with glycol were shown against Escherichia coli. Additionally, low nanoparticle concentrations showed no cytotoxicity for BME-UV1 bovine cells, suggesting that these mixtures might be used for further in vivo testing.
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Affiliation(s)
- Daniel Radzikowski
- Animal Breeding Department, Warsaw University of Life Sciences, 02-786 Warszawa, Poland; (A.K.); (M.K.)
| | - Aleksandra Kalińska
- Animal Breeding Department, Warsaw University of Life Sciences, 02-786 Warszawa, Poland; (A.K.); (M.K.)
| | - Magdalena Kot
- Animal Breeding Department, Warsaw University of Life Sciences, 02-786 Warszawa, Poland; (A.K.); (M.K.)
| | - Sławomir Jaworski
- Department of Nanobiotechnology, Warsaw University of Life Sciences, 02-786 Warszawa, Poland (M.W.)
| | - Mateusz Wierzbicki
- Department of Nanobiotechnology, Warsaw University of Life Sciences, 02-786 Warszawa, Poland (M.W.)
| | - Marcin Gołębiewski
- Animal Breeding Department, Warsaw University of Life Sciences, 02-786 Warszawa, Poland; (A.K.); (M.K.)
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Chung D, Nguyen HT, Yu NH, Yu WJ, Kwon YM, Bae SS, Choi G, Kim JC. In vitro and in vivo antimicrobial activity of the fungal metabolite toluquinol against phytopathogenic bacteria. Front Microbiol 2023; 14:1221865. [PMID: 37583517 PMCID: PMC10424571 DOI: 10.3389/fmicb.2023.1221865] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Accepted: 07/07/2023] [Indexed: 08/17/2023] Open
Abstract
Introduction Bacterial plant diseases cause tremendous economic losses worldwide. However, a few effective and sustainable control methods are currently available. To discover novel and effective management approaches, we screened marine fungi for their antibacterial activity against phytopathogenic bacteria in vitro and in vivo. Methods We screened the culture broth of 55 fungal strains isolated from various marine sources (seawater, algae, and sediment) for their in vitro antibacterial activity using the broth microdilution method. Then, only the fungal strain (designated UL-Ce9) with higher antibacterial activity in vitro was tested in an in vivo experiment against tomato bacterial wilt. The active compounds of UL-Ce9 were extracted using ethyl acetate, purified by a series of chromatography, and the structure was elucidated by nuclear magnetic resonance spectroscopy. Pesticide formulations of toluquinol were prepared as soluble concentrates and wettable powder. The disease control efficacy of toluquinol formulations was evaluated against blight of rice and the bacterial wilt of tomato. Results and discussion The culture broth of UL-Ce9 showed high antibacterial activity against Agrobacterium tumefaciens, Ralstonia solanacearum, and Xanthomonas arboricola pv. pruni in vitro, and we selected UL-Ce9 for the in vivo test. The UL-Ce9 culture broth completely suppressed the bacterial wilt of tomato at a dilution of 1:5. The phylogenetic analysis identified UL-Ce9 as Penicillium griseofulvum, and the antibacterial metabolites were revealed as patulin, gentisyl alcohol, and toluquinol, all of which were associated with the biosynthetic pathway of the mycotoxin patulin. Patulin exhibited the highest antibacterial activity against 16 phytopathogenic bacteria in vitro, followed by toluquinol and gentisyl alcohol. As patulin is toxic, we selected toluquinol to investigate its potential use as a pesticide against bacterial plant diseases. Compared with the chemicals currently being applied in agriculture (streptomycin and oxytetracycline), toluquinol formulations exhibited similar and higher control efficacies against bacterial leaf blight of rice and bacterial wilt of tomato, respectively. To the best of our knowledge, this is the first report of the antibacterial activity of toluquinol against phytopathogenic bacteria. Our results suggest that toluquinol is a potential candidate for the development of novel and effective pesticides for the management of bacterial plant diseases.
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Affiliation(s)
- Dawoon Chung
- Department of Microbial Resources, National Marine Biodiversity Institute of Korea, Seocheon, Republic of Korea
| | - Hoa Thi Nguyen
- Plant Healthcare Research Institute, JAN153 Biotech Incorporated, Gwangju, Republic of Korea
- Center of Organic Biochemistry, Vietnam Institute of Industrial Chemistry, Ha Noi, Vietnam
| | - Nan Hee Yu
- Plant Healthcare Research Institute, JAN153 Biotech Incorporated, Gwangju, Republic of Korea
| | - Woon-Jong Yu
- Department of Microbial Resources, National Marine Biodiversity Institute of Korea, Seocheon, Republic of Korea
| | - Yong Min Kwon
- Department of Microbial Resources, National Marine Biodiversity Institute of Korea, Seocheon, Republic of Korea
| | - Seung Seob Bae
- Department of Microbial Resources, National Marine Biodiversity Institute of Korea, Seocheon, Republic of Korea
| | - Grace Choi
- Department of Microbial Resources, National Marine Biodiversity Institute of Korea, Seocheon, Republic of Korea
| | - Jin-Cheol Kim
- Plant Healthcare Research Institute, JAN153 Biotech Incorporated, Gwangju, Republic of Korea
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5
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Qi L, Du HF, Sun TT, Li L, Zhang YH, Liu YF, Cao F. Natural products from marine fungi as a source against agricultural pathogenic fungi. Appl Microbiol Biotechnol 2023:10.1007/s00253-023-12657-3. [PMID: 37401997 DOI: 10.1007/s00253-023-12657-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 06/15/2023] [Accepted: 06/19/2023] [Indexed: 07/05/2023]
Abstract
There are many kinds of agricultural pathogenic fungi, which may belong to pathogenic fungi in different species, such as Fusarium, Alternaria, Colletotrichum, Phytophthora, and other agricultural pathogens. Pathogenic fungi from different sources are widely distributed in agriculture, which threaten the lives of crops around the world and caused great damage to agricultural production and economic benefits. Due to the particularity of the marine environment, marine-derived fungi could produce natural compounds with unique structures, rich diversities, and significant bioactivities. Since marine natural products with different structural characteristics could inhibit different kinds of agricultural pathogenic fungi, secondary metabolites with antifungal activity could be used as lead compounds against agricultural pathogenic fungi. In order to summarize the structural characteristics of marine natural products against agricultural pathogenic fungi, this review systematically overview the activities against agricultural pathogenic fungi of 198 secondary metabolites from different marine fungal sources. A total of 92 references published from 1998 to 2022 were cited. KEY POINTS: • Pathogenic fungi, which could cause damage to agriculture, were classified. • Structurally diverse antifungal compounds from marine-derived fungi were summarized. • The sources and distributions of these bioactive metabolites were analyzed.
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Affiliation(s)
- Lu Qi
- College of Pharmaceutical Sciences, Key Laboratory of Pharmaceutical Quality Control of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnostics of Education Ministry of China, Baoding, 071002, China
| | - Hui-Fang Du
- College of Pharmaceutical Sciences, Key Laboratory of Pharmaceutical Quality Control of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnostics of Education Ministry of China, Baoding, 071002, China
| | - Tian-Tian Sun
- College of Pharmaceutical Sciences, Key Laboratory of Pharmaceutical Quality Control of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnostics of Education Ministry of China, Baoding, 071002, China
| | - Lei Li
- College of Pharmaceutical Sciences, Key Laboratory of Pharmaceutical Quality Control of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnostics of Education Ministry of China, Baoding, 071002, China
| | - Ya-Hui Zhang
- College of Pharmaceutical Sciences, Key Laboratory of Pharmaceutical Quality Control of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnostics of Education Ministry of China, Baoding, 071002, China
| | - Yun-Feng Liu
- College of Life Sciences, Baoding, 071002, China.
| | - Fei Cao
- College of Pharmaceutical Sciences, Key Laboratory of Pharmaceutical Quality Control of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnostics of Education Ministry of China, Baoding, 071002, China.
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6
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Conrado R, Gomes TC, Roque GSC, De Souza AO. Overview of Bioactive Fungal Secondary Metabolites: Cytotoxic and Antimicrobial Compounds. Antibiotics (Basel) 2022; 11:1604. [PMID: 36421247 PMCID: PMC9687038 DOI: 10.3390/antibiotics11111604] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/07/2022] [Accepted: 11/08/2022] [Indexed: 08/27/2023] Open
Abstract
Microorganisms are known as important sources of natural compounds that have been studied and applied for different purposes in distinct areas. Specifically, in the pharmaceutical area, fungi have been explored mainly as sources of antibiotics, antiviral, anti-inflammatory, enzyme inhibitors, hypercholesteremic, antineoplastic/antitumor, immunomodulators, and immunosuppressants agents. However, historically, the high demand for new antimicrobial and antitumor agents has not been sufficiently attended by the drug discovery process, highlighting the relevance of intensifying studies to reach sustainable employment of the huge world biodiversity, including the microorganisms. Therefore, this review describes the main approaches and tools applied in the search for bioactive secondary metabolites, as well as presents several examples of compounds produced by different fungi species with proven pharmacological effects and additional examples of fungal cytotoxic and antimicrobial molecules. The review does not cover all fungal secondary metabolites already described; however, it presents some reports that can be useful at any phase of the drug discovery process, mainly for pharmaceutical applications.
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Affiliation(s)
| | | | | | - Ana Olívia De Souza
- Development and Innovation Laboratory, Instituto Butantan, Avenida Vital Brasil, 1500, São Paulo 05503-900, SP, Brazil
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7
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Hafez Ghoran S, Taktaz F, Ayatollahi SA, Kijjoa A. Anthraquinones and Their Analogues from Marine-Derived Fungi: Chemistry and Biological Activities. Mar Drugs 2022; 20:md20080474. [PMID: 35892942 PMCID: PMC9394430 DOI: 10.3390/md20080474] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 07/13/2022] [Accepted: 07/22/2022] [Indexed: 12/11/2022] Open
Abstract
Anthraquinones are an interesting chemical class of polyketides since they not only exhibit a myriad of biological activities but also contribute to managing ecological roles. In this review article, we provide a current knowledge on the anthraquinoids reported from marine-derived fungi, isolated from various resources in both shallow waters such as mangrove plants and sediments of the mangrove habitat, coral reef, algae, sponges, and deep sea. This review also tentatively categorizes anthraquinone metabolites from the simplest to the most complicated scaffolds such as conjugated xanthone–anthraquinone derivatives and bianthraquinones, which have been isolated from marine-derived fungi, especially from the genera Apergillus, Penicillium, Eurotium, Altenaria, Fusarium, Stemphylium, Trichoderma, Acremonium, and other fungal strains. The present review, covering a range from 2000 to 2021, was elaborated through a comprehensive literature search using the following databases: ACS publications, Elsevier, Taylor and Francis, Wiley Online Library, MDPI, Springer, and Thieme. Thereupon, we have summarized and categorized 296 anthraquinones and their derivatives, some of which showed a variety of biological properties such as enzyme inhibition, antibacterial, antifungal, antiviral, antitubercular (against Mycobacterium tuberculosis), cytotoxic, anti-inflammatory, antifouling, and antioxidant activities. In addition, proposed biogenetic pathways of some anthraquinone derivatives are also discussed.
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Affiliation(s)
- Salar Hafez Ghoran
- Phytochemistry Research Center, Shahid Beheshti University of Medical Sciences, Tehran 16666-63111, Iran; (S.H.G.); (S.A.A.)
- Medicinal Plant Breeding & Development Research Institute, University of Kurdistan, Sanandaj 66177-15175, Iran
| | - Fatemeh Taktaz
- Department of Advanced Medical and Surgical Sciences, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy;
- Department of Biology, Faculty of Sciences, University of Hakim Sabzevari, Sabzevar 96179-76487, Iran
| | - Seyed Abdulmajid Ayatollahi
- Phytochemistry Research Center, Shahid Beheshti University of Medical Sciences, Tehran 16666-63111, Iran; (S.H.G.); (S.A.A.)
| | - Anake Kijjoa
- ICBAS-Instituto de Ciências Biomédicas Abel Salazar and CIIMAR, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
- Correspondence: ; Tel.: +351-96-271-2474
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8
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Fan J, Lv C, Li Z, Guo M, Yin Y, Wang H, Wang W, Sun S. α-Glucosidase inhibitory effect of an anthraquinonoid produced by Fusarium incarnatum GDZZ-G2. J Basic Microbiol 2022; 62:1360-1370. [PMID: 35736630 DOI: 10.1002/jobm.202200166] [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: 03/19/2022] [Revised: 06/04/2022] [Accepted: 06/11/2022] [Indexed: 11/07/2022]
Abstract
α-Glucosidase is the key enzyme on carbohydrate metabolism, and its bioactive inhibitors are supposed to be an effective therapeutic for type 2 diabetes mellitus. During our continuing study for discovering α-glucosidase inhibitors, a fungus GDZZ-G2 which is derived from a medicinal plant Callicarpa kwangtungensis Chun, exhibited significant inhibition on α-glucosidase. The strain was identified as Fusarium incarnatum by morphological and molecular methods. Further bioassay-guided fractionation result in six known secondary metabolites (1-6). All the compounds except 4 were isolated from F. incarnatum for the first time. Among them, an anthraquinonoid (S)-1,3,6-trihydroxy-7-(1-hydroxyethyl)anthracene-9,10-dione (compound 1) exhibited strong inhibitory effect against α-glucosidase (IC50 = 77.67 ± 0.67 μΜ), compared with acarbose (IC50 = 711.8 ± 5 μΜ). An enzyme kinetics analysis revealed that compound 1 was an uncompetitive inhibitor. Besides, docking simulations predicted that compound 1 inhibited α-glucosidase substrate complex by binding Gln322, Gly306, Thr307, and Ser329 through hydrogen-bond interactions. Our findings suggested that compound 1 can be considered a lead compound for further modifications and the development of a new effective drug candidate in the treatment of type 2 diabetes mellitus.
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Affiliation(s)
- Jiahe Fan
- Department of Natural Medicine and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, China
| | - Chaoyi Lv
- Department of Natural Medicine and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, China
| | - Zhizhou Li
- Department of Natural Medicine and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, China
| | - Mengru Guo
- Department of Natural Medicine and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, China
| | - Yichen Yin
- Department of Natural Medicine and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, China
| | - Hui Wang
- Department of Natural Medicine and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, China
| | - Wei Wang
- Department of Natural Medicine and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, China
| | - Shiwei Sun
- Department of Natural Medicine and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, China
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9
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Chen Y, Liu C, Kumaravel K, Nan L, Tian Y. Two New Sulfate-Modified Dibenzopyrones With Anti-foodborne Bacteria Activity From Sponge-Derived Fungus Alternaria sp. SCSIOS02F49. Front Microbiol 2022; 13:879674. [PMID: 35620099 PMCID: PMC9128073 DOI: 10.3389/fmicb.2022.879674] [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: 02/20/2022] [Accepted: 03/30/2022] [Indexed: 11/13/2022] Open
Abstract
At present, foodborne diseases (FBDs) caused by bacteria are gradually increasing every year, and the development of new antibiotics is an urgent necessity for human beings. To find novel antibacterial compounds, three sponge-derived fungal strains (SCSIOS02F40, F46, and F49) were investigated. As a result, Alternaria sp. SCSIOS02F49 was selected for investigation on its secondary metabolites because its ethyl acetate (EtOAc) extract of potato dextrose broth (PDB) culture showed rich metabolites and strong antibacterial activity. Two new dibenzopyrones with rare sulfate group (1–2), together with 10 known compounds (3–12), were isolated from the Alternaria sp. SCSIOS02F49. Their structures were confirmed by nuclear magnetic resonance (NMR), mass spectrometry (MS) data, and comparison with data from the relevant literature. Almost all compounds showed moderate inhibitory activity against eight foodborne bacteria (FBB) with minimum inhibitory concentration (MIC) values in the range of 15.6–250 μg/ml, and minimum bactericidal concentration (MBC) values in the range of 31.3–250 μg/ml. The antibacterial mechanism of compound 1 was preliminarily investigated using growth curves, scanning electron microscopy (SEM), and flow cytometry (FCM), which revealed that compound 1 altered the external structure of Staphylococcus aureus and caused the rupture or deformation of the cell membranes. This research provides lead compounds for the development of new antibiotics or microbial preservatives.
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Affiliation(s)
- Yaping Chen
- College of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Chuanna Liu
- College of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | | | - Lihong Nan
- College of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Yongqi Tian
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, China
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10
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Lin G, Cheng F, Aimila A, Zhang J, Maiwulanjiang M. Process Optimization for Supercritical Carbon Dioxide Extraction of Origanum vulgare L. Essential Oil Based on the Yield, Carvacrol, and Thymol Contents. J AOAC Int 2022; 105:1719-1729. [DOI: 10.1093/jaoacint/qsac062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/22/2022] [Accepted: 05/09/2022] [Indexed: 11/13/2022]
Abstract
Abstract
Background
Origanum vulgare L. essential oil (OEO) is widely known for its good biological activity, but different extraction methods with significant implications on the yield of OEO and the content of the thymol and carvacrol. As an efficient method for extracting essential oils (EO), the supercritical carbon dioxide extraction (SC-CO2) can improve the yield of EOs while protecting their main active components from loss.
Objective
In this study, the process optimization of SC-CO2 of OEO was carried out. The effects of extraction pressure, temperature, time, and modifier concentration on the composite score of OEO extraction process were investigated.
Method
Response surface analysis was performed using a Box-Behnken design with three levels and four independent variables. Steam distillation (SD) and lipophilic solvents (n-hexane) extraction (LSE) were compared with SC-CO2 for OEO yields. OEOs extracted by the three methods were qualitatively and semi-quantitatively analyzed by gas chromatography quadrupole-time-of-flight mass spectrometry and gas chromatography-flame ionization detector.
Results
The results showed that extraction pressure was the most significant factor affecting the OEO yield, thymol, and carvacrol content. In the optimal conditions (pressure: 217 bar, temperature: 54°C, time: 2 h, modifier concentration: 14%), the yield of OEO reached up to 1.136%, and the contents of thymol and carvacrol reached 53.172 and 41.785 mg/g, respectively.
Conclusions
SC-CO2 was the best extraction method compared to the other two methods. Under the optimal conditions, yield and the content of main components can be effectively improved. It can provide a theoretical basis for the industrial extraction of OEO.
Highlights
Taking the comprehensive score as the index, the interaction between the four independent variables in the supercritical fluid extraction process was evaluated by the response surface method. The effects of extraction parameters on the yield of EOs and the contents of thymol and carvacrol were comprehensively investigated.
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Affiliation(s)
- Guodong Lin
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Urumqi 830011, China
- The Key Laboratory of Plant Resources and Chemistry of Arid Zone, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Urumqi 830011, China
- University of the Chinese Academy of Sciences , Beijing 100039, China
| | - Feng Cheng
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Urumqi 830011, China
- The Key Laboratory of Plant Resources and Chemistry of Arid Zone, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Urumqi 830011, China
- University of the Chinese Academy of Sciences , Beijing 100039, China
| | - Aoken Aimila
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Urumqi 830011, China
- The Key Laboratory of Plant Resources and Chemistry of Arid Zone, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Urumqi 830011, China
| | - Junping Zhang
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Urumqi 830011, China
- The Key Laboratory of Plant Resources and Chemistry of Arid Zone, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Urumqi 830011, China
| | - Maitinuer Maiwulanjiang
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Urumqi 830011, China
- The Key Laboratory of Plant Resources and Chemistry of Arid Zone, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Urumqi 830011, China
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11
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Metabolic Potential of Halophilic Filamentous Fungi—Current Perspective. Int J Mol Sci 2022; 23:ijms23084189. [PMID: 35457008 PMCID: PMC9030287 DOI: 10.3390/ijms23084189] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/06/2022] [Accepted: 04/07/2022] [Indexed: 02/01/2023] Open
Abstract
Salty environments are widely known to be inhospitable to most microorganisms. For centuries salt has been used as a food preservative, while highly saline environments were considered uninhabited by organisms, and if habited, only by prokaryotic ones. Nowadays, we know that filamentous fungi are widespread in many saline habitats very often characterized also by other extremes, for example, very low or high temperature, lack of light, high pressure, or low water activity. However, fungi are still the least understood organisms among halophiles, even though they have been shown to counteract these unfavorable conditions by producing multiple secondary metabolites with interesting properties or unique biomolecules as one of their survival strategies. In this review, we focused on biomolecules obtained from halophilic filamentous fungi such as enzymes, pigments, biosurfactants, and osmoprotectants.
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12
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Phylogenetic diversity and antioxidant activity of selected fungi from ethno-medicinal plants and soil. Mycol Prog 2022. [DOI: 10.1007/s11557-022-01776-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Chen Y, Zhu HY, Xu LC, Wang SP, Liu S, Liu GD, Luo WH, Cao GY, Zhang ZX. Antimicrobial and cytotoxic phenolic bisabolane sesquiterpenoids from the fungus Aspergillus flavipes 297. Fitoterapia 2021; 155:105038. [PMID: 34600094 DOI: 10.1016/j.fitote.2021.105038] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 09/17/2021] [Accepted: 09/23/2021] [Indexed: 10/20/2022]
Abstract
Phenolic bisabolane-type sesquiterpenoids (PBS) represent a rare class of natural products with diverse biological activities. In this study, chemical investigations of the fungus Aspergillus flavipes 297 resulted in the isolation and identification of seven PBS, including a pair of new enantiomers (+)-1a and (-)-1b, a new derivative 2, and five previously reported ones 3-7. The chemical structures of the isolated PBS were determined by extensive NMR and HRESIMS spectroscopic analysis. The absolute configurations of the separated enantiomers (+)-1a and (-)-1b were solved by comparison of the experimental ECD spectra with those of the TDDFT-ECD calculated spectra. The new compounds 1 and 2 represent rare cases of PBS bearing a methylsulfinyl group, which was distinct from the commonly-observed PBS structurally. All the isolated compounds 1-7 were evaluated their antimicrobial and cytotoxic activities. As a result, the tested compounds showed selective antimicrobial activity against several pathogenic bacteria and fungi with the MIC (minimum inhibiting concentrations) values ranging from 2 to 64 μg/mL. Moreover, enantiomers (+)-1a and (-)-1b, together with compound 2, exhibited promising cytotoxicity against MKN-45 and HepG2 cell lines, respectively, indicating that the methylsulfinyl substituent enhanced cytotoxicity to a certain degree.
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Affiliation(s)
- Yu Chen
- Department of General Surgery, the First Affiliated Hospital of Soochow University, Suzhou 215006, China; Department of General Surgery, Suqian First Hospital, Suqian 223800, China
| | - Hong-Yan Zhu
- Department of General Surgery, the First Affiliated Hospital of Soochow University, Suzhou 215006, China; Department of General Surgery, South China Hospital, Health Science Center, Shenzhen University, Shenzhen 518116, China
| | - Lian-Cheng Xu
- Department of General Surgery, Suqian First Hospital, Suqian 223800, China
| | - Shi-Ping Wang
- Department of General Surgery, Suqian First Hospital, Suqian 223800, China
| | - Shan Liu
- Department of General Surgery, Suqian First Hospital, Suqian 223800, China
| | - Guo-Dong Liu
- Department of General Surgery, Suqian First Hospital, Suqian 223800, China
| | - Wei-Huan Luo
- Department of General Surgery, Suqian First Hospital, Suqian 223800, China
| | - Guan-Yi Cao
- Department of General Surgery, Suqian First Hospital, Suqian 223800, China
| | - Zi-Xiang Zhang
- Department of General Surgery, the First Affiliated Hospital of Soochow University, Suzhou 215006, China.
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14
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Discovery of a Novel Lineage Burkholderia cepacia ST 1870 Endophytically Isolated from Medicinal Polygala paniculata Which Shows Potent In Vitro Antileishmanial and Antimicrobial Effects. Int J Microbiol 2021; 2021:6618559. [PMID: 33679984 PMCID: PMC7904367 DOI: 10.1155/2021/6618559] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Accepted: 01/29/2021] [Indexed: 02/02/2023] Open
Abstract
In this study, we report the isolation and identification of an endophytic strain of Burkholderia cepacia (COPS strain) associated with Polygala paniculata roots. Polygala plants are rich sources of promising microbiomes, of which the literature reports several pharmacological effects, such as trypanocidal, antinociceptive, anesthetic, anxiolytics, and anticonvulsant activities. B. cepacia COPS belongs to a new sequence type (ST 1870) and harbors a genome estimated in 8.3 Mbp which exhibits the aminoglycosides and beta-lactams resistance genes aph(3′)-IIa and blaTEM-116, respectively. Analysis performed using MLST, average nucleotide identity, and digital DNA-DNA hybridization support its species-level identification and reveals its novel housekeeping genes alleles gyrB, lepA, and phaC. The root endophyte B. cepacia COPS drew our attention from a group of 14 bacterial isolates during the primary screening for being potentially active against Staphylococcus aureus ATCC 29213, Enterococcus faecalis ATCC 29212, Micrococcus luteus ATCC 9341, Escherichia coli ATCC 25922, and Candida albicans ATCC 10231 and exhibited the broad-spectrum activity against phytopathogenic fungi. In addition, COPS strain showed production of protease, lipase, and esterase in solid media, and its natural product extract showed potent inhibition against fungal plant pathogens, such as Moniliophthora perniciosa, whose antagonism index (89.32%) exceeded the positive control (74.17%), whereas Sclerotinia sclerotiorum and Ceratocystis paradoxa showed high percentages of inhibition (85.53% and 82.69%, respectively). COPS crude extract also significantly inhibited S. epidermidis ATCC 35984, E. faecium ATCC 700221 (MIC values of 32 μg/mL for both), E. faecalis ATCC 29212 (64 μg/mL), and S. aureus ATCC 25923 (128 μg/mL). We observed moderate antagonistic activity against A. baumannii ATCC 19606 and E. coli ATCC 25922 (both at 512 μg/mL), as well as potent cytotoxic effects on Leishmania infantum and Leishmania major promastigote forms with 78.25% and 57.30% inhibition. In conclusion, this study presents for the first time the isolation of an endophytic B. cepacia strain associated with P. paniculata and enough evidence that these plants may be considered a rich source of microbes for the fight against neglected diseases.
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15
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Li X, Zhao H, Chen X. Screening of Marine Bioactive Antimicrobial Compounds for Plant Pathogens. Mar Drugs 2021; 19:69. [PMID: 33525648 PMCID: PMC7912171 DOI: 10.3390/md19020069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Revised: 01/21/2021] [Accepted: 01/25/2021] [Indexed: 01/09/2023] Open
Abstract
Plant diseases have been threatening food production. Controlling plant pathogens has become an important strategy to ensure food security. Although chemical control is an effective disease control strategy, its application is limited by many problems, such as environmental impact and pathogen resistance. In order to overcome these problems, it is necessary to develop more chemical reagents with new functional mechanisms. Due to their special living environment, marine organisms have produced a variety of bioactive compounds with novel structures, which have the potential to develop new fungicides. In the past two decades, screening marine bioactive compounds to inhibit plant pathogens has been a hot topic. In this review, we summarize the screening methods of marine active substances from plant pathogens, the identification of marine active substances from different sources, and the structure and antibacterial mechanism of marine active natural products. Finally, the application prospect of marine bioactive substances in plant disease control was prospected.
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Affiliation(s)
- Xiaohui Li
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315832, China; (X.L.); (H.Z.)
| | - Hejing Zhao
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315832, China; (X.L.); (H.Z.)
| | - Xiaolin Chen
- State Key Laboratory of Agricultural Microbiology and Provincial Hubei Key Laboratory of Plant Pathology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
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16
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Ameen F, AlNadhari S, Al-Homaidan AA. Marine microorganisms as an untapped source of bioactive compounds. Saudi J Biol Sci 2021; 28:224-231. [PMID: 33424301 PMCID: PMC7783642 DOI: 10.1016/j.sjbs.2020.09.052] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 09/11/2020] [Accepted: 09/27/2020] [Indexed: 01/12/2023] Open
Abstract
The search for novel biologically active molecules has extended to the screening of organisms associated with less explored environments. In this sense, Oceans, which cover nearly the 67% of the globe, are interesting ecosystems characterized by a high biodiversity that is worth being explored. As such, marine microorganisms are highly interesting as promising sources of new bioactive compounds of potential value to humans. Some of these microorganisms are able to survive in extreme marine environments and, as a result, they produce complex molecules with unique biological interesting properties for a wide variety of industrial and biotechnological applications. Thus, different marine microorganisms (fungi, myxomycetes, bacteria, and microalgae) producing compounds with antioxidant, antibacterial, apoptotic, antitumoral and antiviral activities have been already isolated. This review compiles and discusses the discovery of bioactive molecules from marine microorganisms reported from 2018 onwards. Moreover, it highlights the huge potential of marine microorganisms for obtaining highly valuable bioactive compounds.
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Affiliation(s)
- Fuad Ameen
- Department of Botany & Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Saleh AlNadhari
- Department of Plant Protection, College of Agriculture, King Saud University, Riyadh, Saudi Arabia
| | - Ali A. Al-Homaidan
- Department of Botany & Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
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17
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Fungal Secondary Metabolites: Current Research, Commercial Aspects, and Applications. Fungal Biol 2021. [DOI: 10.1007/978-3-030-85603-8_8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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18
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Baranova AA, Alferova VA, Korshun VA, Tyurin AP. Antibiotics from Extremophilic Micromycetes. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2020; 46:903-971. [PMID: 33390684 PMCID: PMC7768999 DOI: 10.1134/s1068162020060023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 05/08/2020] [Accepted: 05/12/2020] [Indexed: 12/03/2022]
Abstract
Extremophilic microorganisms, which are capable of functioning normally at extremely high or low temperatures, pressure, and in other environmental conditions, have been in the focus of microbiologists' attention for several decades due to the biotechnological potential of enzymes inherent in extremophiles. These enzymes (also called extremozymes) are used in the production of food and detergents and other industries. At the same time, the inhabitants of extreme econiches remained almost unexplored for a long time in terms of the chemistry of natural compounds. In recent years, the emergence of new antibiotic-resistant strains of pathogens, which affect humans and animals has become a global problem. The problem is compounded by a strong slowdown in the development of new antibiotics. In search of new active substances and scaffolds for medical chemistry, researchers turn to unexplored natural sources. In recent years, there has been a sharp increase in the number of studies on secondary metabolites produced by extremophiles. From the discovery of penicillin to the present day, micromycetes, along with actinobacteria, are one of the most productive sources of antibiotic compounds for medicine and agriculture. Many authors consider extremophilic micromycetes as a promising source of small molecules with an unusual mechanism of action or significant structural novelty. This review summarizes the latest (for 2018-2019) experimental data on antibiotic compounds, which are produced by extremophilic micromycetes with various types of adaptation. Active metabolites are classified by the type of structure and biosynthetic origin. The data on the biological activity of the isolated metabolites are summarized.
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Affiliation(s)
- A. A. Baranova
- Gause Institute of New Antibiotics, 119021 Moscow, Russia
| | - V. A. Alferova
- Gause Institute of New Antibiotics, 119021 Moscow, Russia
- National Research University, Higher School of Economics, 101000 Moscow, Russia
| | - V. A. Korshun
- Gause Institute of New Antibiotics, 119021 Moscow, Russia
- Shemyakin–Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
- National Research University, Higher School of Economics, 101000 Moscow, Russia
| | - A. P. Tyurin
- Gause Institute of New Antibiotics, 119021 Moscow, Russia
- National Research University, Higher School of Economics, 101000 Moscow, Russia
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19
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Marine-Derived Compounds and Prospects for Their Antifungal Application. Molecules 2020; 25:molecules25245856. [PMID: 33322412 PMCID: PMC7763435 DOI: 10.3390/molecules25245856] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/03/2020] [Accepted: 12/10/2020] [Indexed: 12/16/2022] Open
Abstract
The introduction of antifungals in clinical practice has an enormous impact on the provision of medical care, increasing the expectancy and quality of life mainly of immunocompromised patients. However, the emergence of pathogenic fungi that are resistant and multi-resistant to the existing antifungal therapy has culminated in fungal infections that are almost impossible to treat. Therefore, there is an urgent need to discover new strategies. The marine environment has proven to be a promising rich resource for the discovery and development of new antifungal compounds. Thus, this review summarizes more than one hundred marine natural products, or their derivatives, which are categorized according to their sources—sponges, bacteria, fungi, and sea cucumbers—as potential candidates as antifungal agents. In addition, this review focus on recent developments using marine antifungal compounds as new and effective approaches for the treatment of infections caused by resistant and multi-resistant pathogenic fungi and/or biofilm formation; other perspectives on antifungal marine products highlight new mechanisms of action, the combination of antifungal and non-antifungal agents, and the use of nanoparticles and anti-virulence therapy.
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20
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Karbalaei-Heidari HR, Budisa N. Combating Antimicrobial Resistance With New-To-Nature Lanthipeptides Created by Genetic Code Expansion. Front Microbiol 2020; 11:590522. [PMID: 33250877 PMCID: PMC7674664 DOI: 10.3389/fmicb.2020.590522] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Accepted: 10/13/2020] [Indexed: 01/10/2023] Open
Abstract
Due to the rapid emergence of multi-resistant bacterial strains in recent decades, the commercially available effective antibiotics are becoming increasingly limited. On the other hand, widespread antimicrobial peptides (AMPs) such as the lantibiotic nisin has been used worldwide for more than 40 years without the appearance of significant bacterial resistance. Lantibiotics are ribosomally synthesized antimicrobials generated by posttranslational modifications. Their biotechnological production is of particular interest to redesign natural scaffolds improving their pharmaceutical properties, which has great potential for therapeutic use in human medicine and other areas. However, conventional protein engineering methods are limited to 20 canonical amino acids prescribed by the genetic code. Therefore, the expansion of the genetic code as the most advanced approach in Synthetic Biology allows the addition of new amino acid building blocks (non-canonical amino acids, ncAAs) during protein translation. We now have solid proof-of-principle evidence that bioexpression with these novel building blocks enabled lantibiotics with chemical properties transcending those produced by natural evolution. The unique scaffolds with novel structural and functional properties are the result of this bioengineering. Here we will critically examine and evaluate the use of the expanded genetic code and its alternatives in lantibiotics research over the last 7 years. We anticipate that Synthetic Biology, using engineered lantibiotics and even more complex scaffolds will be a promising tool to address an urgent problem of antibiotic resistance, especially in a class of multi-drug resistant microbes known as superbugs.
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Affiliation(s)
- Hamid Reza Karbalaei-Heidari
- Department of Biology, Faculty of Sciences, Shiraz University, Shiraz, Iran
- Department of Chemistry, University of Manitoba, Winnipeg, MB, Canada
| | - Nediljko Budisa
- Department of Chemistry, University of Manitoba, Winnipeg, MB, Canada
- Institute of Chemistry, Technical University of Berlin, Berlin, Germany
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21
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Kamat S, Kumari M, Sajna KV, Jayabaskaran C. Endophytic fungus, Chaetomium globosum, associated with marine green alga, a new source of Chrysin. Sci Rep 2020; 10:18726. [PMID: 33127928 PMCID: PMC7603332 DOI: 10.1038/s41598-020-72497-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 09/02/2020] [Indexed: 01/29/2023] Open
Abstract
The marine ecosystem is an extraordinary reserve of pharmaceutically important, bioactive compounds even in this “synthetic age”. Marine algae-associated endophytic fungi have gained prominence as an important source of bioactive compounds. This study was conducted on secondary metabolites of Chaetomium globosum-associated with marine green alga Chaetomorpha media from the Konkan coastline, India. Its ethyl acetate extract (CGEE) exhibited an IC50 value of 7.9 ± 0.1 µg/mL on MCF-7 cells. CGEE exhibited G2M phase cell cycle arrest, ROS production and MMP loss in MCF-7 cells. The myco-components in CGEE contributing to the cytotoxicity were found by Gas Chromatography/Mass Spectrometry analyses. Chrysin, a dihydroxyflavone was one of the forty-six myco-components which is commonly found in honey, propolis and passionflower extracts. The compound was isolated and characterized as fungal chrysin using HPLC, UV–Vis spectroscopy, LC–MS, IR and NMR analyses by comparing with standard chrysin. The purified compound exhibited an IC50 value of 49.0 ± 0.6 µM while that of standard chrysin was 48.5 ± 1.6 µM in MCF-7 cells. It induced apoptosis, G1 phase cell cycle arrest, MMP loss, and ROS production. This is the first report of chrysin from an alternative source with opportunities for yield enhancement.
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Affiliation(s)
- Siya Kamat
- Department of Biochemistry, Indian Institute of Science, Bangalore, 560012, India
| | - Madhuree Kumari
- Department of Biochemistry, Indian Institute of Science, Bangalore, 560012, India
| | | | - C Jayabaskaran
- Department of Biochemistry, Indian Institute of Science, Bangalore, 560012, India.
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22
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Zhao DL, Han XB, Wang M, Zeng YT, Li YQ, Ma GY, Liu J, Zheng CJ, Wen MX, Zhang ZF, Zhang P, Zhang CS. Herbicidal and Antifungal Xanthone Derivatives from the Alga-Derived Fungus Aspergillus versicolor D5. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:11207-11214. [PMID: 32915561 DOI: 10.1021/acs.jafc.0c04265] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Fungi have been proved as promising and prolific sources of functional secondary metabolites with potent agricultural applications. In this study, 14 xanthone derivatives (1-14), including six new ones, versicones I-N (1-4, 7, 11), and a biogenetically related derivative (15), were isolated from the alga-derived fungus Aspergillus versicolor D5. Their structures were elucidated by comprehensive spectroscopic methods. Versicone L (4) exhibited a broad antifungal spectrum and prominent inhibitory effects on Botrytis cinerea at a minimum inhibitory concentration (MIC) of 152 μM, 7-fold stronger than that of the positive control, carbendazim (MIC = 1.05 × 103 μM). Dihydrosterigmatocystin (13) showed strong antifungal activity toward B. cinerea at MIC = 38.3 μM, almost 30-fold stronger than that of carbendazim. Meanwhile, 13 exhibited potent herbicidal activity toward Amaranthus retroflexus L. with an MIC of 24.5 μM, approximately 4-fold stronger than that of the positive control, glyphosate (MIC = 94.7 μM). Additionally, 13 also displayed remarkable activity against other weeds belonging to Amaranth sp. Analysis of the structure-herbicidal activity relationship indicated that the bifuranic ring played an important role in xanthone phytotoxicity and the presence of a double bond in the furan ring could decrease phytotoxicity. This study indicated that xanthones can be served as promising candidates for lead compounds of agrochemicals.
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Affiliation(s)
- Dong-Lin Zhao
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, People's Republic of China
| | - Xiao-Bin Han
- Zunyi Branch, Guizhou Tobacco Company, Zunyi 563000, People's Republic of China
| | - Mei Wang
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, People's Republic of China
| | - Yun-Tao Zeng
- Zunyi Branch, Guizhou Tobacco Company, Zunyi 563000, People's Republic of China
| | - Yi-Qiang Li
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, People's Republic of China
| | - Guo-Yong Ma
- Zunyi Branch, Guizhou Tobacco Company, Zunyi 563000, People's Republic of China
| | - Jing Liu
- Zunyi Branch, Guizhou Tobacco Company, Zunyi 563000, People's Republic of China
| | - Cai-Juan Zheng
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, People's Republic of China
| | - Ming-Xia Wen
- Zunyi Branch, Guizhou Tobacco Company, Zunyi 563000, People's Republic of China
| | - Zhi-Fan Zhang
- Zunyi Branch, Guizhou Tobacco Company, Zunyi 563000, People's Republic of China
| | - Peng Zhang
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, People's Republic of China
| | - Cheng-Sheng Zhang
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, People's Republic of China
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23
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Li M, Yu R, Bai X, Wang H, Zhang H. Fusarium: a treasure trove of bioactive secondary metabolites. Nat Prod Rep 2020; 37:1568-1588. [PMID: 32785347 DOI: 10.1039/d0np00038h] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Covering up to December 2019Fusarium, one of the most common fungal genera, has received considerable attention because of its biosynthetic exuberance, the result of many unique gene clusters involved in the production of secondary metabolites. This review provides the first comprehensive analysis of the secondary metabolites unique to the genus Fusarium, describing their occurrence, bioactivity, and genome features.
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Affiliation(s)
- Mingzhu Li
- School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China.
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24
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Zhao DL, Zhang XF, Huang RH, Wang D, Wang XQ, Li YQ, Zheng CJ, Zhang P, Zhang CS. Antifungal Nafuredin and Epithiodiketopiperazine Derivatives From the Mangrove-Derived Fungus Trichoderma harzianum D13. Front Microbiol 2020; 11:1495. [PMID: 32676071 PMCID: PMC7333244 DOI: 10.3389/fmicb.2020.01495] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 06/08/2020] [Indexed: 01/17/2023] Open
Abstract
A new polyketide derivative, nafuredin C (1), a novel heterocyclic dipeptide, trichodermamide G (3), together with four known biogenetically related compounds nafuredin A (2), trichodermamide A (4), aspergillazin A (5), and peniisocoumarin H (6), were isolated from the mangrove-derived fungus Trichoderma harzianum D13. Their structures, including their absolute configurations, were determined by spectroscopic analysis and time-dependent density functional theory-electronic circular dichroism (ECD) calculations. Trichodermamide G was found to be a novel epithiodiketopiperazine derivative with an unprecedented cyclic system containing a sulfur bridge, and nafuredin C represented the third nafuredin derivative of these homologous compounds. The new compound nafuredin C exhibited obvious antifungal activity against Magnaporthe oryzae with a minimum inhibitory concentration (MIC) of 8.63 μM, which is on the same order of magnitude as the positive control carbendazim (MIC = 3.27 μM).
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Affiliation(s)
- Dong-Lin Zhao
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Xi-Fen Zhang
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Rui-Huan Huang
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Dan Wang
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
- Plant Protection Station of Shandong Province, Jinan, China
| | - Xiao-Qiang Wang
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Yi-Qiang Li
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Cai-Juan Zheng
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, Haikou, China
| | - Peng Zhang
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Cheng-Sheng Zhang
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
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25
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Ibrar M, Ullah MW, Manan S, Farooq U, Rafiq M, Hasan F. Fungi from the extremes of life: an untapped treasure for bioactive compounds. Appl Microbiol Biotechnol 2020; 104:2777-2801. [DOI: 10.1007/s00253-020-10399-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 01/02/2020] [Accepted: 01/20/2020] [Indexed: 01/01/2023]
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26
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Heo YM, Lee H, Kim K, Kwon SL, Park MY, Kang JE, Kim GH, Kim BS, Kim JJ. Fungal Diversity in Intertidal Mudflats and Abandoned Solar Salterns as a Source for Biological Resources. Mar Drugs 2019; 17:md17110601. [PMID: 31652878 PMCID: PMC6891761 DOI: 10.3390/md17110601] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 10/18/2019] [Accepted: 10/22/2019] [Indexed: 02/06/2023] Open
Abstract
Intertidal zones are unique environments that are known to be ecological hot spots. In this study, sediments were collected from mudflats and decommissioned salterns on three islands in the Yellow Sea of South Korea. The diversity analysis targeted both isolates and unculturable fungi via Illumina sequencing, and the natural recovery of the abandoned salterns was assessed. The phylogeny and bioactivities of the fungal isolates were investigated. The community analysis showed that the abandoned saltern in Yongyudo has not recovered to a mudflat, while the other salterns have almost recovered. The results suggested that a period of more than 35 years may be required to return abandoned salterns to mudflats via natural restoration. Gigasporales sp. and Umbelopsis sp. were selected as the indicators of mudflats. Among the 53 isolates, 18 appeared to be candidate novel species, and 28 exhibited bioactivity. Phoma sp., Cladosporium sphaerospermum, Penicillium sp. and Pseudeurotium bakeri, and Aspergillus urmiensis showed antioxidant, tyrosinase inhibition, antifungal, and quorum-sensing inhibition activities, respectively, which has not been reported previously. This study provides reliable fungal diversity information for mudflats and abandoned salterns and shows that they are highly valuable for bioprospecting not only for novel microorganisms but also for novel bioactive compounds.
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Affiliation(s)
- Young Mok Heo
- Division of Environmental Science & Ecological Engineering, College of Life Sciences & Biotechnology, Korea University, Seoul 02841, Korea.
| | - Hanbyul Lee
- Division of Environmental Science & Ecological Engineering, College of Life Sciences & Biotechnology, Korea University, Seoul 02841, Korea.
| | - Kyeongwon Kim
- Division of Environmental Science & Ecological Engineering, College of Life Sciences & Biotechnology, Korea University, Seoul 02841, Korea.
| | - Sun Lul Kwon
- Division of Environmental Science & Ecological Engineering, College of Life Sciences & Biotechnology, Korea University, Seoul 02841, Korea.
| | - Min Young Park
- Department of Biosystems & Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Korea.
| | - Ji Eun Kang
- Department of Biosystems & Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Korea.
| | - Gyu-Hyeok Kim
- Division of Environmental Science & Ecological Engineering, College of Life Sciences & Biotechnology, Korea University, Seoul 02841, Korea.
| | - Beom Seok Kim
- Division of Biotechnology, College of Life Sciences & Biotechnology, Korea University, Seoul 02841, Korea.
| | - Jae-Jin Kim
- Division of Environmental Science & Ecological Engineering, College of Life Sciences & Biotechnology, Korea University, Seoul 02841, Korea.
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27
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Zhao D, Han X, Wang D, Liu M, Gou J, Peng Y, Liu J, Li Y, Cao F, Zhang C. Bioactive 3-Decalinoyltetramic Acids Derivatives From a Marine-Derived Strain of the Fungus Fusarium equiseti D39. Front Microbiol 2019; 10:1285. [PMID: 31231352 PMCID: PMC6568041 DOI: 10.3389/fmicb.2019.01285] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 05/23/2019] [Indexed: 11/28/2022] Open
Abstract
Two novel 3-decalinoyltetramic acid (3DTA) derivatives, namely fusarisetins C and D (1 and 2), and four known derivatives (3-6) were isolated from the marine-derived fungus Fusarium equiseti D39. Their structures were determined by spectroscopic data, vibrational circular dichroism (VCD) calculations, and X-ray crystallography. Compound 2 was identified as the first fusarisetin to possess an unprecedented carbon skeleton with a tetracyclic ring system comprised of a decalin moiety (6/6) and a tetramic acid moiety. A plausible biosynthetic pathway for the isolated compounds was proposed. All 3DTAs derivatives exhibited a potent phytotoxicity, and 5 also displayed a remarkable anti-phytopathogenic activity superior to the positive control resulting in damage of the cell membrane of Pseudomonas syringae and ensuing leakage of the intracellular components. Here, the phytotoxicity of fusarisetins has been reported for the first time. The OSMAC fermentation optimization approach to give 5 was performed by varying the culture media and salinities. The results showed that potato liquid medium with 1% salinity is the most favorable condition for the production of 5.
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Affiliation(s)
- Donglin Zhao
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Xiaobin Han
- Zunyi Branch, Guizhou Tobacco Company, Zunyi, China
| | - Dan Wang
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Minghong Liu
- Zunyi Branch, Guizhou Tobacco Company, Zunyi, China
| | - Jianyu Gou
- Zunyi Branch, Guizhou Tobacco Company, Zunyi, China
| | - Yulong Peng
- Zunyi Branch, Guizhou Tobacco Company, Zunyi, China
| | - Jing Liu
- Zunyi Branch, Guizhou Tobacco Company, Zunyi, China
| | - Yiqiang Li
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Fei Cao
- College of Pharmaceutical Sciences, Hebei University, Baoding, China
| | - Chengsheng Zhang
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, China
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28
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Two New Succinimide Derivatives Cladosporitins A and B from the Mangrove-derived Fungus Cladosporium sp. HNWSW-1. Mar Drugs 2018; 17:md17010004. [PMID: 30577517 PMCID: PMC6356855 DOI: 10.3390/md17010004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 12/14/2018] [Accepted: 12/17/2018] [Indexed: 02/06/2023] Open
Abstract
Two new succinimide-containing derivatives, cladosporitins A (1) and B (2), were isolated from the fermentation cultures of the mangrove-derived fungus Cladosporium sp. HNWSW-1, along with a new pyrone, clapone (3), as well as the previously reported talaroconvolutin A (4) and anthraquinone (5). The structures of the isolated compounds were elucidated by 1D, 2D NMR, and HRMS spectral analysis. Compound 2 showed cytotoxicity against BEL-7042, K562 and SGC-7901 cell lines with IC50 values of 29.4 ± 0.35 μM, 25.6 ± 0.47 μM, and 41.7 ± 0.71 μM, respectively, whereas compound 4 exhibited cytotoxicity against Hela and BEL-7042 cell lines with IC50 values of 14.9 ± 0.21 μM and 26.7 ± 1.1 μM, respectively. In addition, compounds 4 and 5 displayed inhibitory activity against α-glycosidase, with IC50 values of 78.2 ± 2.1 μM and 49.3 ± 10.6 μM, respectively.
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29
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Benzophenone Derivatives from an Algal-Endophytic Isolate of Penicillium chrysogenum and Their Cytotoxicity. Molecules 2018; 23:molecules23123378. [PMID: 30572672 PMCID: PMC6321059 DOI: 10.3390/molecules23123378] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 12/12/2018] [Accepted: 12/17/2018] [Indexed: 12/20/2022] Open
Abstract
Chromatographic separation of a marine algal-derived endophytic fungus Penicillium chrysogenum AD-1540, which was isolated from the inner tissue of the marine red alga Grateloupia turuturu, yielded two new benzophenone derivatives, chryxanthones A and B (compounds 1 and 2, respectively). Their structures were undoubtedly determined by comprehensive analysis of spectroscopic data (1D/2D NMR and HRESIMS). The relative and absolute configurations were assigned by analysis of the coupling constants and time-dependent density functional theory (TDDFT) calculations of their electronic circular dichroism (ECD) spectra, respectively. Both compounds possessed an unusual dihydropyran ring (ring D) fused to an aromatic ring, rather than the commonly occurring prenyl moiety, and a plausible biosynthetic pathway was postulated. The cytotoxicities of compounds 1 and 2 were evaluated against six human cell lines, and both of the compounds demonstrated weak to moderate cytotoxicities with IC50 values ranging from 20.4 to 46.4 μM. These new compounds further demonstrate the potential of marine-derived fungi as an untapped source of pharmaceutical components with unique properties that could be developed as drug candidates.
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30
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Zhang P, Li X, Yuan XL, Du YM, Wang BG, Zhang ZF. Antifungal Prenylated Diphenyl Ethers from Arthrinium arundinis, an Endophytic Fungus Isolated from the Leaves of Tobacco ( Nicotiana tabacum L.). Molecules 2018; 23:E3179. [PMID: 30513840 PMCID: PMC6320909 DOI: 10.3390/molecules23123179] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 11/29/2018] [Accepted: 11/29/2018] [Indexed: 01/12/2023] Open
Abstract
An endophytic fungus Arthrinium arundinis TE-3 was isolated and purified from the fresh leaves of cultivated tobacco (Nicotiana tabacum L.). Chemical investigation on this fungal strain afforded three new prenylated diphenyl ethers (1-3) as well as three known analogues (4-6). Structure elucidation of the isolated compounds was carried out by analysis of 1D and 2D nuclear magnetic resonance (NMR) and high-resolution electrospray ionization mass spectroscopy (HRESIMS) spectra, as well as by comparison of those data with literature data. The absolute configuration of the stereogenic center at C-8 in 1 was assigned by comparison of the experimental and calculated ECD spectra. Compounds 1 and 2 showed selective antifungal activity against Mucor hiemalis with minimum inhibitory concentration (MIC) values of 8 and 4 μg/mL, respectively. Compounds 5 and 6 exhibited inhibitory activity against Alteraria alternata with an MIC value of 8 μg/mL. In the cytotoxic assay, 2, 5, and 6 displayed moderate in vitro cytotoxicity against the human monocytic cell line (THP-1 cell line), with IC50 values of 40.2, 28.3, and 25.9 μM, respectively. This study indicated that endophytic fungi possess great potential for exploring new bioactive secondary metabolites.
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Affiliation(s)
- Peng Zhang
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China.
| | - Xin Li
- Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
| | - Xiao-Long Yuan
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China.
| | - Yong-Mei Du
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China.
| | - Bin-Gui Wang
- Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
| | - Zhong-Feng Zhang
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China.
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31
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Huang RH, Gou JY, Zhao DL, Wang D, Liu J, Ma GY, Li YQ, Zhang CS. Phytotoxicity and anti-phytopathogenic activities of marine-derived fungi and their secondary metabolites. RSC Adv 2018; 8:37573-37580. [PMID: 35558593 PMCID: PMC9089327 DOI: 10.1039/c8ra08047j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 10/26/2018] [Indexed: 01/06/2023] Open
Abstract
To find new pesticides for agricultural use, 133 fungal strains were isolated from coastal marine habitats, from which 37 independent isolates were identified, belonging to 20 genera in nine orders, and the diversity of the isolated fungi were discussed. The phytotoxicity and anti-phytopathogenic fungal and bacterial activities of these 37 extracts, and two previously isolated fungal extracts were evaluated, displaying different levels of bioactivity. Based on the bioactive and chemical screening, an Alternaria sp. (P8) strain, which showed prominent bioactivity and contained abundant secondary metabolites was selected for further chemical investigation; one new compound, a benzopyranone (1), and seven known compounds (2-8) were obtained. Their structures were determined by analysing extensive NMR spectroscopic data and ECD comparisons. Compounds 1, 2, and 6-8 showed obvious phytotoxicity, especially against amaranth, and compound 1 also showed potent antifungal activity toward Alternaria brassicicola. To the best of our knowledge, this is the first report of the phytotoxicity of marine-derived fungi and their secondary metabolites. These studies should provide the foundation for future research into the use of such fungal extracts to combat weeds and diseases in agriculture.
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Affiliation(s)
- Rui-Huan Huang
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences Qingdao 266101 China +86-532-8870-2115
| | - Jian-Yu Gou
- Zunyi Branch, Guizhou Tobacco Company Zunyi 563000 China
| | - Dong-Lin Zhao
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences Qingdao 266101 China +86-532-8870-2115
| | - Dan Wang
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences Qingdao 266101 China +86-532-8870-2115
| | - Jing Liu
- Zunyi Branch, Guizhou Tobacco Company Zunyi 563000 China
| | - Guo-Yong Ma
- Zunyi Branch, Guizhou Tobacco Company Zunyi 563000 China
| | - Yi-Qiang Li
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences Qingdao 266101 China +86-532-8870-2115
| | - Cheng-Sheng Zhang
- Marine Agriculture Research Center, Tobacco Research Institute of Chinese Academy of Agricultural Sciences Qingdao 266101 China +86-532-8870-2115
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32
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Perylenequione Derivatives with Anticancer Activities Isolated from the Marine Sponge-Derived Fungus, Alternaria sp. SCSIO41014. Mar Drugs 2018; 16:md16080280. [PMID: 30110969 PMCID: PMC6117713 DOI: 10.3390/md16080280] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 08/06/2018] [Accepted: 08/08/2018] [Indexed: 12/13/2022] Open
Abstract
Seven new secondary metabolites classified as two perylenequinone derivatives (1 and 2), an altenusin derivative (3), two phthalide racemates (4 and 5), and two phenol derivatives (6 and 7), along with twenty-one known compounds (8–28) were isolated from cultures of the sponge-derived fungus, Alternaria sp. SCSIO41014. The structures and absolute configurations of these new compounds (1–7) were determined by spectroscopic analysis, X-ray single crystal diffraction, chiral-phase HPLC separation, and comparison of ECD spectra to calculations. Altertoxin VII (1) is the first example possessing a novel 4,8-dihydroxy-substituted perylenequinone derivative, while the phenolic hydroxy groups have commonly always substituted at C-4 and C-9. Compound 1 exhibited cytotoxic activities against human erythroleukemia (K562), human gastric carcinoma cells (SGC-7901), and hepatocellular carcinoma cells (BEL-7402) with IC50 values of 26.58 ± 0.80, 8.75 ± 0.13, and 13.11 ± 0.95 μg/mL, respectively. Compound 11 showed selectively cytotoxic activity against K562, with an IC50 value of 19.67 ± 0.19 μg/mL. Compound 25 displayed moderate inhibitory activity against Staphylococcus aureus with an MIC value of 31.25 μg/mL.
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