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  • 3-Anhydro-6-hydroxy-ophiobolin A, a new sesterterpene inhibiting the growth of methicillin-resistant Staphylococcus aureus and inducing the cell death by apoptosis on K562, from the phytopathogenic fungus Bipolaris oryzae

    Author(s)
    Wang, Quan-Xin
    Yang, Jian-Ling
    Qi, Qiu-Yue
    Bao, Li
    Yang, Xiao-Li
    Liu, Miao-Miao
    Huang, Pei
    Zhang, Li-Xin
    Chen, Ji-Long
    Cai, Lei
    Liu, Hong-Wei
    Griffith University Author(s)
    Liu, Miaomiao
    Year published
    2013
    Metadata
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    Abstract
    A new ophiobolin derivative, 3-anhydro-6-hydroxy-ophiobolin A (1), as well as two known ophiobolin derivatives 3-anhydro-ophiobolin A (2) and 3-anhydro-6-epi-ophiobolin A (3) were isolated from the PDB culture of a phytopathogenic fungus Bipolaris oryzae. The structure of 1 was elucidated through 2D NMR and other spectroscopic techniques. Compound 1 exhibited strong antimicrobial activity against Bacille Calmette–Guerin, Bacillus subtilis, Staphylococcus aureus, and methicillin-resistant Staphylococcus aureus with MIC value of 12.5 μg/mL, and potent antiproliferative activity against cell lines HepG2 and K562 with IC50 of ...
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    A new ophiobolin derivative, 3-anhydro-6-hydroxy-ophiobolin A (1), as well as two known ophiobolin derivatives 3-anhydro-ophiobolin A (2) and 3-anhydro-6-epi-ophiobolin A (3) were isolated from the PDB culture of a phytopathogenic fungus Bipolaris oryzae. The structure of 1 was elucidated through 2D NMR and other spectroscopic techniques. Compound 1 exhibited strong antimicrobial activity against Bacille Calmette–Guerin, Bacillus subtilis, Staphylococcus aureus, and methicillin-resistant Staphylococcus aureus with MIC value of 12.5 μg/mL, and potent antiproliferative activity against cell lines HepG2 and K562 with IC50 of 6.49 μM and 4.06 μM, respectively. Further studies on the cytotoxicity of compound 1 against K562 cells demonstrated that it induced apoptosis, observed by flow cytometric method. Preliminary structure–activity relationships of these ophiobolins and the mechanism of apoptosis induced by 1 were analyzed.
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    Journal Title
    Bioorganic & Medicinal Chemistry Letters
    Volume
    23
    DOI
    https://doi.org/10.1016/j.bmcl.2013.04.034
    Subject
    Medicinal and biomolecular chemistry
    Medicinal and biomolecular chemistry not elsewhere classified
    Organic chemistry
    Pharmacology and pharmaceutical sciences
    Publication URI
    http://hdl.handle.net/10072/369395
    Collection
    • Journal articles

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