SKU: M054  / 
    CAS Number: 6152-57-4


    $401.76 - $1,405.08

    O-Methylviridicatin is a natural derivative of the alkaloid mycotoxin viridicatin produced by several species of Penicillium.  The scaffold of quinolin-2(1H)-one is a useful structural motif found in many natural products.  In particular, derivatives of 4-arylquinolinones have attracted attention for their anticancer/antiviral activities.  O-Methylviridicatin is a fungal metabolite that can inhibit the tumor necrosis factor alpha (TNFα)-induced replication of HIV.

    O-Methylviridicatin is soluble in ethanol, methanol, DMSO and DMF but is practically insoluble in water.

    Microbiology Applications During a high-throughput, cell-based, virus-free assay screening system, 15,000 fungal extracts were screened and the metabolite 3-O-Methylviridicatin was shown to be an inhibitor of cytokine tumour necrosis factor alpha  (TNFα)-induced replication of HIV. This factor activates transcription of the provirus in both T-cells and macrophages.  It blocked TNF- α activation of the HIV long terminal repeat (LTR) in a HeLa-based system (IC50 =5 µM), and inhibited HIV replication in OM-10.1 cell line, which are HL-60 promyelocytes infected with HIV-1, which is a model of TNF-α-induced chronic infection (IC50 =2.5µM)(Heguy et al, 1998).

    The synthesis of O-Methylviridicatin and its several analogs have shed insights into the development of new anti-inflammatory agents.  In particular, 4-phenyl-3-methylthioquinolinone had an enhanced ability to inhibit TNF-α-secretion (Sun et al, 2015). 

    References Bracken A, Pocker A and Raistrick H (1954)  Studies in the biochemistry of microorganisms. 93. Cyclopenin, a nitrogen-containing metabolic product of Penicillium cyclopium Westling. Biochem J. 57(4):587-595  PMID 13198807

    Ciegler A and Hou CT (1970)  Isolation of viridicatin from Penicillium palitans. Arch. Mikrobiol.  73(3):261-267  PMID 5487865

    Heguy A et al (1998)  Isolation and characterization of the fungal metabolite 3-O-methylviridicatin as an inhibitor of tumor necrosis factor alpha-induced human immunodeficiency virus replication. Antivir. Chem. Chemother. 9(2):149-155  PMID 9875386

    Ma YM et al (2017)  A new isoquinolone alkaloid from an endophytic fungus R22 Nerium indicum. Nat. Prod. Res. 31(8):951-958  PMID  27910702

    Ribiero N et al (2007)  Synthesis of 3-O-methylviridicatin analogues with improved anti-TNF-a properties. Bioorg. & Med. Chem. Lett. 17(20):5523-5524 

    Sun B et al (2015)  A novel and facile synthesis of 4-arylquinolin-2(1H)-ones under metal-free conditions.  Chin. Chem. Lett. 26:977-979