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Leesombun A, Iijima M, Pagmadulam B, Orkhon B, Doi H, Issiki K, Sawa R, Nihei CI, Nishikawa Y. Metacytofilin has potent anti-malarial activity. Parasitol Int 2020; 81:102267. [PMID: 33307212 DOI: 10.1016/j.parint.2020.102267] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 11/18/2020] [Accepted: 12/04/2020] [Indexed: 11/15/2022]
Abstract
Metacytofilin (MCF) was isolated from the fungus Metarhizium sp. TA2759. Although MCF possesses anti-Toxoplasma activity, the effects of this compound against other parasites are unknown. Here, we evaluated the in vitro anti-malarial activity of MCF against the 3D7 strain and the chloroquine-resistant K1 strain of Plasmodium falciparum. The half maximal inhibitory concentrations (IC50) of MCF against the 3D7 and K-1 strains following culture for 48 h were 666 nM and 605 nM, respectively. Artemisinin was more potent than MCF against both strains (3D7 IC50: 17.4 nM; K-1 IC50: 18.3 nM), while chloroquine was ineffective against the chloroquine-resistant strain (3D7 IC50: 39.1 nM; K-1 IC50: 1.62 μM). MCF affected the ring stage of the parasites, resulting in their death as shown by spots within red blood cells. MCF also inhibited parasite growth following culture for 72 h (3D7 IC50, 285 nM). Four optical isomers of cyclo[Leu-Phe]-diketopiperazine derivatives with modified methoxy and/or hydroxyl groups lost anti-malarial activity, suggesting that the spatial positions of the methoxy and hydroxyl groups in MCF play an important role in its anti-malarial effects. Together, these data suggest that MCF may represent a promising lead compound for treatment of drug-resistant malarial parasites.
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Affiliation(s)
- Arpron Leesombun
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan; Department of Pre-clinical and Applied Animal Science, Faculty of Veterinary Science, Mahidol University, 999 Phutthamonthon Sai 4 Road Salaya, Phutthamonthon Nakhonpathom 73170, Thailand
| | - Masatomi Iijima
- Institute of Microbial Chemistry (BIKAKEN), Shizuoka 410-0301, Japan
| | - Baldorj Pagmadulam
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan
| | - Banzragchgarav Orkhon
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan
| | - Hiroyasu Doi
- Institute of Microbial Chemistry (BIKAKEN), Shizuoka 410-0301, Japan
| | - Kunio Issiki
- Institute of Microbial Chemistry (BIKAKEN), Shinagawa, Tokyo 141-0021, Japan
| | - Ryuichi Sawa
- Institute of Microbial Chemistry (BIKAKEN), Shinagawa, Tokyo 141-0021, Japan
| | - Coh-Ichi Nihei
- Institute of Microbial Chemistry (BIKAKEN), Shinagawa, Tokyo 141-0021, Japan.
| | - Yoshifumi Nishikawa
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan.
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Leesombun A, Iijima M, Umeda K, Kondoh D, Pagmadulam B, Abdou AM, Suzuki Y, Ohba SI, Isshiki K, Kimura T, Kubota Y, Sawa R, Nihei CI, Nishikawa Y. Metacytofilin Is a Potent Therapeutic Drug Candidate for Toxoplasmosis. J Infect Dis 2020; 221:766-774. [PMID: 31573038 DOI: 10.1093/infdis/jiz501] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 09/28/2019] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Toxoplasmosis, a parasitic disease caused by Toxoplasma gondii, is an important cause of miscarriage or adverse fetal effects, including neurological and ocular manifestations in humans. Current anti-Toxoplasma drugs have limited efficacy against toxoplasmosis and also have severe side effects. Therefore, novel efficacious drugs are urgently needed. Here, we identified metacytofilin (MCF) from a fungal Metarhizium species as a potential anti-Toxoplasma compound. METHODS Anti-Toxoplasma activities of MCF and its derivatives were evaluated in vitro and in vivo using nonpregnant and pregnant mice. To understand the mode of action of MCF, the RNA expression of host and parasite genes was investigated by RNAseq. RESULTS In vitro, MCF inhibited the viability of intracellular and extracellular T. gondii. Administering MCF intraperitoneally or orally to mice after infection with T. gondii tachyzoites increased mouse survival compared with the untreated animals. Remarkably, oral administration of MCF to pregnant mice prevented vertical transmission of the parasite. Interestingly, RNA sequencing of T. gondii-infected cells treated with MCF showed that MCF inhibited DNA replication and enhanced RNA degradation in the parasites. CONCLUSIONS With its potent anti-T. gondii activity, MCF is a strong candidate for future drug development against toxoplasmosis.
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Affiliation(s)
- Arpron Leesombun
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido, Japan.,Department of Pre-clinic and Applied Animal Science, Faculty of Veterinary Science, Mahidol University, Salaya, Phutthamonthon Nakhonpathom, Thailand
| | | | - Kousuke Umeda
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido, Japan
| | - Daisuke Kondoh
- Department of Basic Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido, Japan
| | - Baldorj Pagmadulam
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido, Japan
| | - Ahmed M Abdou
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido, Japan.,Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, South Valley University, Qena City, Egypt
| | - Yutaka Suzuki
- Graduate School of Frontier Science, University of Tokyo, Kashiwa, Chiba, Japan
| | | | - Kunio Isshiki
- Institute of Microbial Chemistry, Shinagawa, Tokyo, Japan
| | | | - Yumiko Kubota
- Institute of Microbial Chemistry, Shinagawa, Tokyo, Japan
| | - Ryuichi Sawa
- Institute of Microbial Chemistry, Shinagawa, Tokyo, Japan
| | - Coh-Ichi Nihei
- Institute of Microbial Chemistry, Shinagawa, Tokyo, Japan
| | - Yoshifumi Nishikawa
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido, Japan
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Secrieru A, Costa ICC, O’Neill PM, Cristiano MLS. Antimalarial Agents as Therapeutic Tools Against Toxoplasmosis-A Short Bridge between Two Distant Illnesses. Molecules 2020; 25:E1574. [PMID: 32235463 PMCID: PMC7181032 DOI: 10.3390/molecules25071574] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 03/26/2020] [Accepted: 03/27/2020] [Indexed: 11/16/2022] Open
Abstract
Toxoplasmosis is an infectious disease with paramount impact worldwide, affecting many vulnerable populations and representing a significant matter of concern. Current therapies used against toxoplasmosis are based essentially on old chemotypes, which fail in providing a definitive cure for the disease, placing the most sensitive populations at risk for irreversible damage in vital organs, culminating in death in the most serious cases. Antimalarial drugs have been shown to possess key features for drug repurposing, finding application in the treatment of other parasite-borne illnesses, including toxoplasmosis. Antimalarials provide the most effective therapeutic solutions against toxoplasmosis and make up for the majority of currently available antitoxoplasmic drugs. Additionally, other antiplasmodial drugs have been scrutinized and many promising candidates have emanated in recent developments. Available data demonstrate that it is worthwhile to explore the activity of classical and most recent antimalarial chemotypes, such as quinolines, endoperoxides, pyrazolo[1,5-a]pyrimidines, and nature-derived peptide-based parasiticidal agents, in the context of toxoplasmosis chemotherapy, in the quest for encountering more effective and safer tools for toxoplasmosis control or eradication.
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Affiliation(s)
- Alina Secrieru
- Center of Marine Sciences, CCMAR, Gambelas Campus, University of Algarve, UAlg, 8005-139 Faro, Portugal; (A.S.); (I.C.C.C.)
- Department of Chemistry and Pharmacy, Faculty of Sciences and Technology, FCT, Gambelas Campus, University of Algarve, UAlg, 8005-139 Faro, Portugal
- Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, UK;
| | - Inês C. C. Costa
- Center of Marine Sciences, CCMAR, Gambelas Campus, University of Algarve, UAlg, 8005-139 Faro, Portugal; (A.S.); (I.C.C.C.)
- Department of Chemistry and Pharmacy, Faculty of Sciences and Technology, FCT, Gambelas Campus, University of Algarve, UAlg, 8005-139 Faro, Portugal
| | - Paul M. O’Neill
- Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, UK;
| | - Maria L. S. Cristiano
- Center of Marine Sciences, CCMAR, Gambelas Campus, University of Algarve, UAlg, 8005-139 Faro, Portugal; (A.S.); (I.C.C.C.)
- Department of Chemistry and Pharmacy, Faculty of Sciences and Technology, FCT, Gambelas Campus, University of Algarve, UAlg, 8005-139 Faro, Portugal
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Tapfuma KI, Uche-Okereafor N, Sebola TE, Hussan R, Mekuto L, Makatini MM, Green E, Mavumengwana V. Cytotoxic activity of crude extracts from Datura stramonium's fungal endophytes against A549 lung carcinoma and UMG87 glioblastoma cell lines and LC-QTOF-MS/MS based metabolite profiling. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 19:330. [PMID: 31752824 PMCID: PMC6873518 DOI: 10.1186/s12906-019-2752-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 11/11/2019] [Indexed: 02/12/2023]
Abstract
BACKGROUND Endophytic fungi are a proven source of bioactive secondary metabolites that may provide lead compounds for novel drug discovery. In this study, crude extracts from fungal endophytes isolated from Datura stramonium were evaluated for cytotoxic activity on two human cancer cell lines. METHODS Fungal endophytes were isolated from surface sterilized aerial parts of D. stramonium and identified using molecular, morphological and phylogenetic methods. Ethyl acetate crude extracts from these isolates were evaluated for cytotoxic activity on A549 lung carcinoma and UMG87 glioblastoma cell lines. Metabolite profiling was then performed by liquid chromatography coupled to quadrupole time-of-flight with tandem mass spectrometry (LC-QTOF-MS/MS) for the cytotoxic crude extract. RESULTS Eleven fungal endophytes were identified from D. stramonium. Significant cytotoxicity was only observed from the crude extract of Alternaria sp. KTDL7 on UMG87 glioblastoma cells (IC50 = 21.49 μg/ml). Metabolite profiling of this crude extract tentatively revealed the presence of the following secondary metabolites: 1,8-dihydroxynaphthalene (1), anserinone B (2), phelligridin B (3), metacytofilin (4), phomopsidin (5) and vermixocin A (6). Compounds 2 and 3 have been shown to be cytotoxic in literature. CONCLUSION The findings in this study suggest that the crude extract of Alternaria sp. KTDL7 possesses compound(s) cytotoxic to glioblastoma multiforme cells. Future studies to isolate and characterize the cytotoxic compound(s) from this fungus could result in lead development of a fungal-based drug for glioblastoma multiforme treatment.
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Aparicio-Cuevas MA, Rivero-Cruz I, Sánchez-Castellanos M, Menéndez D, Raja HA, Joseph-Nathan P, González MDC, Figueroa M. Dioxomorpholines and Derivatives from a Marine-Facultative Aspergillus Species. JOURNAL OF NATURAL PRODUCTS 2017; 80:2311-2318. [PMID: 28796494 DOI: 10.1021/acs.jnatprod.7b00331] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Two new dioxomorpholines, 1 and 2, three new derivatives, 3-5, and the known compound PF1233 B (6) were isolated from a marine-facultative Aspergillus sp. MEXU 27854. Their structures were established by 1D and 2D NMR and HRESIMS data analysis. The absolute configuration of 1 and 2 was elucidated by comparison of experimental and DFT-calculated vibrational circular dichroism spectra. Compounds 3, 5, and 6 were noncytotoxic to a panel of human cancer cell lines with different functional status for the tumor-suppressor protein p53, but were inhibitors of P-glycoprotein-reversing multidrug resistance in a doxorubicin-resistant cell line.
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Affiliation(s)
| | | | | | - Daniel Menéndez
- Genome Integrity and Structural Biology Laboratory, National Institute of Environmental Health Sciences, NIH , Research Triangle Park, North Carolina 27709, United States
| | - Huzefa A Raja
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro , Greensboro, North Carolina 27402, United States
| | - Pedro Joseph-Nathan
- Departamento de Química, Centro de Investigación y de Estudios, Avanzados del Instituto Politécnico Nacional , Apartado 14-740, Ciudad de México 07000, México
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Andrioli WJ, Lopes AA, Cavalcanti BC, Pessoa C, Nanayakkara NPD, Bastos JK. Isolation and characterization of 2-pyridone alkaloids and alloxazines from Beauveria bassiana. Nat Prod Res 2016; 31:1920-1929. [PMID: 28032511 DOI: 10.1080/14786419.2016.1269091] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Two novel compounds bearing heterocyclic nitrogen, 2-pyridone alkaloid (1) and alloxazine derivative (2), along with the known pretenellin B (3), pyridovericin (4) and lumichrome (5) were isolated from a culture of the entomopathogenic fungal strain Beauveria bassiana. The chemical structures of 2-pyridone alkaloid and alloxazine derivative were established on the basis of the interpretation of spectroscopic data. The isolated compounds were evaluated in a panel of five cancer cell lines and pyridovericin exhibited cytotoxicity (IC50, μM) against cancer cell lines: HL-60 (25.9 ± 0.3), HCT8 (34.6 ± 3.6), MDA-MB435 (34.8 ± 3.8) and SF295 (31.1 ± 0.6). Considering that other pyridone compounds display good cytotoxic activity, it would be suggested to obtain new semi synthetic derivatives of pyridovericin, for the development of new cytotoxic chemical entities.
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Affiliation(s)
- W J Andrioli
- a Faculdade de Ciências Farmacêuticas de Ribeirão Preto , Universidade de São Paulo , Ribeirão Preto , Brazil.,d Laboratório de Produtos Bioativos , Universidade Federal do Rio de Janeiro , Macaé , Brazil
| | - A A Lopes
- a Faculdade de Ciências Farmacêuticas de Ribeirão Preto , Universidade de São Paulo , Ribeirão Preto , Brazil.,e Unidade de Biotecnologia , Universidade de Ribeirão Preto , Ribeirão Preto , Brazil
| | - B C Cavalcanti
- b Departamento de Fisiologia e de Farmacologia , Universidade Federal do Ceará , Fortaleza , Brazil
| | - C Pessoa
- b Departamento de Fisiologia e de Farmacologia , Universidade Federal do Ceará , Fortaleza , Brazil
| | - N P D Nanayakkara
- c National Center for Natural Products Research , University of Mississippi , Oxford , MS , USA
| | - J K Bastos
- a Faculdade de Ciências Farmacêuticas de Ribeirão Preto , Universidade de São Paulo , Ribeirão Preto , Brazil
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Donzelli B, Krasnoff S. Molecular Genetics of Secondary Chemistry in Metarhizium Fungi. GENETICS AND MOLECULAR BIOLOGY OF ENTOMOPATHOGENIC FUNGI 2016; 94:365-436. [DOI: 10.1016/bs.adgen.2016.01.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Smelcerovic A, Dzodic P, Pavlovic V, Cherneva E, Yancheva D. Cyclodidepsipeptides with a promising scaffold in medicinal chemistry. Amino Acids 2014; 46:825-40. [PMID: 24414220 DOI: 10.1007/s00726-014-1666-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Accepted: 01/03/2014] [Indexed: 11/28/2022]
Abstract
Among the large family of cyclodepsipeptides, the simplest members are the cyclodidepsipeptides which have an ester group and an amide group in the same six-membered ring. To point out the pharmacological potential of this class of compounds, the present article reviews structure, isolation, synthesis and biological properties of the known cyclodidepsipeptides. Synthesis of cyclodidepsipeptides is achieved by two general approaches--by initial formation of the amide bond, or initial formation of the ester bond; and subsequent intermolecular cyclization to cyclodidepsipeptide structure. It is closely related to the condensation and ring-closure strategies applied in the preparation of the larger members of the cyclodepsipeptide family. However, due to synthesis of the smaller heretocycles it allows for the use of more versatile building blocks. There are data on antimicrobial, antioxidant and immunomodulatory activities of cyclodidepsipeptides as well as their inhibitory activities toward α-glucosidase, acyl-CoA:cholesterol acyltransferase, xanthine oxidase and platelet aggregation. Because we have recently found that two 6-(propan-2-yl)-4-methyl-morpholine-2,5-diones, as novel non-purine xanthine oxidase inhibitors, may give promise to be used in the treatment of gout, in this review we have included a study of molecular interactions of the selected cyclodidepsipeptides with xanthine oxidase using idTarget web server. Cyclodidepsipeptides showed promising pharmacological activities and meet all criteria for good solubility and permeability. However, further research of their medical application is necessary. In addition to this, the diversity of natural cyclodidepsipeptides, simplicity for synthesis and convenience for rational drug design indicate the cyclodidepsipeptide as promising scaffold in medicinal chemistry.
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Affiliation(s)
- Andrija Smelcerovic
- Department of Chemistry, Faculty of Medicine, University of Nis, Bulevar Dr Zorana Djindjica 81, 18000, Nis, Serbia,
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Pavlovic V, Cherneva E, Yancheva D, Smelcerovic A. 6-(Propan-2-yl)-3-methyl-morpholine-2,5-dione, a novel cyclodidepsipeptide with modulatory effect on rat thymocytes. Food Chem Toxicol 2012; 50:3014-8. [DOI: 10.1016/j.fct.2012.06.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Revised: 06/01/2012] [Accepted: 06/05/2012] [Indexed: 10/28/2022]
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Synthesis, structure and antimicrobial activity of 6-(propan-2-yl)-3-methyl-morpholine-2,5-dione. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2012.02.057] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Pavlovic V, Djordjevic A, Cherneva E, Yancheva D, Smelcerovic A. Stimulatory effect on rat thymocytes proliferation and antimicrobial activity of two 6-(propan-2-yl)-4-methyl-morpholine-2,5-diones. Food Chem Toxicol 2012; 50:761-6. [DOI: 10.1016/j.fct.2011.11.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Revised: 11/03/2011] [Accepted: 11/07/2011] [Indexed: 11/24/2022]
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Chen XL, Wu M, Ti HH, Wei XY, Li TH. Three New 3,6-Dioxygenated Diketopiperazines from the Basidiomycete Lepista sordida. Helv Chim Acta 2011. [DOI: 10.1002/hlca.201000455] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Smelcerovic A, Yancheva D, Cherneva E, Petronijevic Z, Lamshoeft M, Herebian D. Identification and synthesis of three cyclodidepsipeptides as potential precursors of enniatin B in Fusarium sporotrichioides. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2010.11.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Agrobacterium-mediated disruption of a nonribosomal peptide synthetase gene in the invertebrate pathogen Metarhizium anisopliae reveals a peptide spore factor. Appl Environ Microbiol 2008; 74:4366-80. [PMID: 18502925 DOI: 10.1128/aem.00285-08] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Numerous secondary metabolites have been isolated from the insect pathogenic fungus Metarhizium anisopliae, but the roles of these compounds as virulence factors in disease development are poorly understood. We targeted for disruption by Agrobacterium tumefaciens-mediated transformation a putative nonribosomal peptide synthetase (NPS) gene, MaNPS1. Four of six gene disruption mutants identified were examined further. Chemical analyses showed the presence of serinocyclins, cyclic heptapeptides, in the extracts of conidia of control strains, whereas the compounds were undetectable in DeltaManps1 mutants treated identically or in other developmental stages, suggesting that MaNPS1 encodes a serinocyclin synthetase. Production of the cyclic depsipeptide destruxins, M. anisopliae metabolites also predicted to be synthesized by an NPS, was similar in DeltaManps1 mutant and control strains, indicating that MaNPS1 does not contribute to destruxin biosynthesis. Surprisingly, a MaNPS1 fragment detected DNA polymorphisms that correlated with relative destruxin levels produced in vitro, and MaNPS1 was expressed concurrently with in vitro destruxin production. DeltaManps1 mutants exhibited in vitro development and responses to external stresses comparable to control strains. No detectable differences in pathogenicity of the DeltaManps1 mutants were observed in bioassays against beet armyworm and Colorado potato beetle in comparison to control strains. This is the first report of targeted disruption of a secondary metabolite gene in M. anisopliae, which revealed a novel cyclic peptide spore factor.
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Ciminiello P, Dell'Aversano C, Fattorusso E, Forino M, Grauso L, Santelia FU, Tartaglione L, Moutsos VI, Pitsinos EN, Couladouros EA. Stereostructural Determination by a Synthetic and NMR-Based Approach of Three Oxazinins Isolated from Adriatic Mussels. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700574] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Sasaki T, Takahashi S, Uchida K, Funayama S, Kainosho M, Nakagawa A. Biosynthesis of Quinolactacin A, a TNF Production Inhibitor. J Antibiot (Tokyo) 2006; 59:418-27. [PMID: 17025018 DOI: 10.1038/ja.2006.59] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Quinolactacins, which inhibit tumor necrosis factor production, contain a quinolone skeleton conjugated with a y-lactam. The biosynthesis of quinolactacin was investigated by feeding experiments using 13C single-labeled precursors (sodium [1-13C]acetate, DL-[1-13C]-isoleucine, L-[methyl-13C]methionine, and sodium [1-13C]-anthranilate) and D-[U-13C]glucose.
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Affiliation(s)
- Tatsuya Sasaki
- Department of Biosciences, Teikyo University, 1-1 Toyosatodai, Utsunomiya, Tochigi 320-8551, Japan
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Roberts DW, St Leger RJ. Metarhizium spp., cosmopolitan insect-pathogenic fungi: mycological aspects. ADVANCES IN APPLIED MICROBIOLOGY 2004; 54:1-70. [PMID: 15251275 DOI: 10.1016/s0065-2164(04)54001-7] [Citation(s) in RCA: 245] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Donald W Roberts
- Department of Biology, Utah State University, Logan, Utah 84322-5305, USA
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Arnone A, Nasini G, Pava OVD, Capelli S, Meille SV. Secondary Mould Metabolites, LII. Structure Elucidation of Diatretol – A New Diketopiperazine Metabolite from the FungusClitocybe diatreta. ACTA ACUST UNITED AC 1996. [DOI: 10.1002/jlac.199619961123] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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