• 제목/요약/키워드: Marine-derived fungus

검색결과 38건 처리시간 0.022초

해양 유래 곰팡이 Penicillium glabrum의 성분 (Chemical Constituents from Marine-derived Fungus Penicillium glabrum)

  • 민진영;박소연;심상희
    • 생약학회지
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    • 제45권2호
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    • pp.101-106
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    • 2014
  • Marine-derived microbes have yielded a variety of metabolites so far. In the course of the project to find metabolites from marine microbes, an isolate of Penicillium glabrum (SF 5317) was selected for chemical investigation. A large scale culture of this strain in PDA media was extracted with an organic solvent and the extract was subjected to a serious of chromatography, which led to six metabolites. Their chemical structures were elucidated as sulochrin (1), questin (2), questinol (3), ergosterol (4), 3-methyldesmethoxyyangonin (5), and hydroxysulochrin (6) on the basis of spectroscopic data. To the best of our knowledge, this is the second isolation of compounds 5 and 6 in nature and especially 6 is isolated from Penicillium sp. for the first time.

Polyketides from a Sponge-Derived Fungus, Aspergillus versicolor

  • Lee, Yoon-Mi;Mansoor, Tayyab A.;Hong, Jong-Ki;Lee, Chong-O;Bae, Kyung-Sook;Jung, Jee-H
    • Natural Product Sciences
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    • 제13권1호
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    • pp.90-96
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    • 2007
  • Bioactivity guided fractionation of the cultured filtrates of Aspergillus versicolor, which was derived from a marine sponge Petrosia sp., yielded three polyketides: decumbenones A (1),B (2), and versiol (3). These compounds were identified on the basis of 1D and 2D NMR spectroscopic and MS analysis. The absolute configuration was defined by the modified Mosher's method. The isolated compounds were tested for cytotoxicity against a panel of five human solid tumor cell lines and antibacterial activity against twenty clinically isolated methicillin-resistant strains. This is the first report on the isolation of these compounds from a marine source.

해양균류의 Tyrosinase 저해활성 검색 (Screening of Tyrosinase Inhibiting Activity from the Marine-Derived Fungus)

  • ;;정지헌;이강태;최홍대;손병화
    • 생약학회지
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    • 제34권2호통권133호
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    • pp.138-141
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    • 2003
  • In order to screen new tyrosinase inhibiting principle which is expected to be a new biofunctional skin whitening cosmetics, we have isolated 600 strains of the marine- derived fungi and investigated tyrosinase inhibiting activity for their acetone extracts. The significant activities (>70% Inhibition) were observed in the extract of 10 strains of fungi (MFA7, MFA27, MFA58, MFA317, MFA318, MFA345, MFA412, MFA552, MFA562, MFA581). These active strains were cultured in SWS medium with 1 L scale and the resulting broth and mycelium were extracted to afford mycelium extract (000M) and broth extract (000B), respectively. Tyrosinase inhibiting activity for all extracts has been tested. As the results, the broth extracts of 4 strains (27B, 58B, 552B and 581B) exhibited relatively high levels of activity of $IC_{50}$ values of $3.0-19.0\;{\mu}g/mL$. The active component of 581B was purified by assay-guided isolation to yield the known kojic acid (1), and its structure was determined by physicochemical evidence. Kojic acid showed the significant tyrosinase inhibitory activity with $IC_{50}$ values of $12.0\;{\mu}M$.

Microbial Transformation of a Monoterpene, Geraniol, by the Marine-derived Fungus Hypocrea sp.

  • Leutou, Alain S.;Yang, Guohua;Nenkep, Viviane N.;Siwe, Xavier N.;Feng, Zhile;Khong, Thang T.;Choi, Hong-Dae;Kang, Jung-Sook;Son, Byeng-Wha
    • Journal of Microbiology and Biotechnology
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    • 제19권10호
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    • pp.1150-1152
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    • 2009
  • Geraniol (1) is the biogenetic precursor of a number of monoterpenes. We tested various marine-derived microorganisms to determine their ability to biotransform 1. Only Hypocrea sp. was capable of transforming 1 into its oxidized derivative, 1,7-dihydroxy-3,7-dimethyl-(E)-oct-2-ene (2). The structure of the metabolite obtained was assigned on the basis of detailed spectroscopic data analyses.

Steroid Components of Marine-Derived Fungal Strain Penicillium levitum N33.2 and Their Biological Activities

  • Chi K. Hoang;Cuong H. Le; Dat T. Nguyen;Hang T. N. Tran;Chinh V. Luu;Huong M. Le;Ha T. H. Tran
    • Mycobiology
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    • 제51권4호
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    • pp.246-255
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    • 2023
  • Genus Penicillium comprising the most important and extensively studied fungi has been well-known as a rich source of secondary metabolites. Our study aimed to analyze and investigate biological activities, including in vitro anti-cancer, anti-inflammatory and anti-diabetic properties, of metabolites from a marine-derived fungus belonging to P. levitum. The chemical compounds in the culture broth of P. levitum strain N33.2 were extracted with ethyl acetate. Followingly, chemical analysis of the extract leaded to the isolation of three ergostane-type steroid components, namely cerevisterol (1), ergosterol peroxide (2), and (3β,5α,22E)-ergosta-6,8(14),22-triene-3,5-diol (3). Among these, (3) was the most potent cytotoxic against human cancer cell lines Hep-G2, A549 and MCF-7 with IC50 values of 2.89, 18.51, and 16.47 ㎍/mL, respectively, while the compound (1) showed no significant effect against tested cancer cells. Anti-inflammatory properties of purified compounds were evaluated based on NO-production in LPS-induced murine RAW264.7 macrophages. As a result, tested compounds performed diverse inhibitory effects on NO production by the macrophages, with the most significant inhibition rate of 81.37±1.35% at 25 ㎍/mL by the compound (2). Interestingly, compounds (2) and (3) exhibited inhibitory activities against pancreatic lipase and α-glucosidase enzymes in vitro assays. Our study brought out new data concerning the chemical properties and biological activities of isolated steroids from a P. levitum fungus.

New Production of 5-Bromotoluhydroquinone and 4-O-Methyltoluhydroquinone from the Marine-Derived Fungus Dothideomycete sp.

  • Leutou, Alain S.;Yun, Keum-Ja;Choi, Hong-Dae;Kang, Jung-Sook;Son, Byeng-Wha
    • Journal of Microbiology and Biotechnology
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    • 제22권1호
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    • pp.80-83
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    • 2012
  • The addition of NaBr to the fermentation medium of a marine isolate of the fungus Dothideomycete sp. resulted in induced production of two toluhydroquinone derivatives, 5-bromotoluhydroquinone (1) and 4-O-methyltoluhydroquinone (2), and two known compounds, toluhydroquinone (3) and gentisyl alcohol (4). The structures of 1 and 2 were assigned through the spectroscopic data analyses. Compounds 1-4 showed a potent antibacterial activity against the methicillin-resistant and multidrug-resistant Staphylococcus aureus (MRSA and MDRSA) with MIC (minimum inhibitory concentration) values of 6.2, 12.5, 6.2, and 12.5 ${\mu}g/ml$, respectively. Compounds 1-4 also exhibited a moderate radical scavenging activity against 1,1-diphenyl-2-picrylhydrazyl (DPPH) with $IC_{50}$ values of 11.0, 17.0, 12.0, and 7.0 ${\mu}M$, respectively, which were more active than the positive control, L-ascorbic acid ($IC_{50}$, 20.0 ${\mu}M$).

An Acetophenone Derivative, Clavatol, and a Benzodiazepine Alkaloid, Circumdatin A, from the Marine-Derived Fungus Cladosporium

  • Yang, Guohua;Nenkep, Viviane N.;Siwe, Xavier N.;Leutou, Alain S.;Feng, Zhile;Zhang, Dahai;Choi, Hong-Dae;Kang, Jung-Sook;Son, Byeng-Wha
    • Natural Product Sciences
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    • 제15권3호
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    • pp.130-133
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    • 2009
  • The crude extract of the mycelium of Cladosporium was found to exhibit antimicrobial activity against the Staphylococcus aureus, methicillin-resistant S. aureus, and multidrug-resistant S. aureus. Bioassayguided fractionation of an organic extract led to the isolation of an acetophenone derivative, clavatol (2',4'-dihydroxy-3',5'-dimethylacetophenone) (1), and a benzodiazepine alkaloid, circumdatin A (2). Compound 1 showed moderate antibacterial activity against S. aureus, methicillin-resistant S. aureus, and multidrug-resistant S. aureus with minimum inhibitory concentration (MIC) values of 62.5, 62.5, 31.0 $\mu$g/mL, respectively, but compound 2 was inactive. Compounds 1 and 2 exhibited UV-A protection activity with ED$_{50}$ values of 227.0 and 82.0 $\mu$M, respectively, indicating that they were more potent than the positive control, oxybenzone (ED$_{50}$ 350 $\mu$M), a common sunscreen agent.

Aspergillus fumigatus-derived demethoxyfumitremorgin C inhibits proliferation of PC3 human prostate cancer cells through p53/p21-dependent G1 arrest and apoptosis induction

  • Kim, Young-Sang;Park, Sun Joo
    • Fisheries and Aquatic Sciences
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    • 제24권1호
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    • pp.1-9
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    • 2021
  • Human prostate cancer is the second most frequently diagnosed cancer worldwide, and its incidence rate continues to increase. Advanced prostate cancer is more difficult to treat than early forms due to its chemotherapy resistance. There is need for more effective agents that can inhibit the progression of advanced prostate cancer. Demethoxyfumitremorgin C (DMFTC) was isolated from the fermentation extract of the marine fungus Aspergillus fumigatus. Antiproliferative activity of DMFTC against human prostate cancer PC3 cells was examined through cell cycle analysis by flow cytometry, the fluorescent nuclear imaging analysis with propidium iodide (PI), and proteins expression related to cell cycle arrest and apoptosis were investigated via Western blotting. DMFTC inhibited PC3 cells growth through G1 phase cell cycle arrest and apoptosis induction. It activated the tumor suppressor p53 and the Cdk inhibitor p21, which regulate the cell progression into the G1 phase. Additionally, PI-positive late apoptotic non-viable cells were increased and the expression levels of the G1-positive downstream regulators cyclin D, cyclin E, Cdk2, and Cdk4 were decreased by DMFTC treatment. These results suggest that DMFTC induces G1 arrest and apoptosis induction through regulation of p53/p21-dependent cyclin-Cdk complexes, and it may be a useful therapeutic agent for the treatment of human advanced prostate cancer.