Secondary metabolites, 3D structure: Trivial name – sterigmatocystin

Date: 26 November 2013

Secondary metabolites, 3D structure: Trivial name – sterigmatocystin

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Notes:

Species: A. discophorus, A. flavus, A. multicolor, A. nidulans, A. olivicola, A. parasiticus, A. rambellii, A. ustus, A. versicolor, Emericella nidulans, Emericella venezuelensisSystematic name: 7H-Furo[3′,2′:4,5]furo[2,3-c]xanthen-7-one, 3a,12c-dihydro-8-hydroxy-6-methoxy-, (3aR,12cS)-Molecular formulae: C18H12O6Molecular weight: 324.284Chemical abstracts number: 10048-13-2Selected references: Steyn M; Rabie C J Production of sterigmatocystin. Journal – Association of Official Analytical Chemists (1975), 58(3), 622-3. Tag, Andrew; Hicks, Julie; Garifullina, Gulnara; Ake, Charles, Jr; Phillips, T. D.; Beremand, Marian; Keller, Nancy (CORPORATE SOURCE Departments of Plant Pathology and Microbiology, Texas A and M University, College Station, TX 77843-2132, USA).Hamasaki, Takashi; Nakagomi, Takeo; Hatsuda, Yuichi; Fukuyama, Keiichi; Katsube, Yukiteru (Fac. Agric., Tottori Univ., Tottori 680, Japan). Agric. Biol. Chem., 44(5), 1149-55 (English) 1980.Frisvad JC, Skouboe P, Samson RA. Taxonomic comparison of three different groups of aflatoxin producers and a new efficient producer of aflatoxin B1, sterigmatocystin and 3-O-methylsterigmatocystin, Aspergillus rambellii sp. nov. Syst Appl Microbiol. 2005 Jul;28(5):442-53. Frisvad JC, Samson RA. Emericella venezuelensis, a new species with stellate ascospores producing sterigmatocystin and aflatoxin B1. Syst Appl Microbiol. 2004 Nov;27(6):672-80.Toxicity: Oral LD50 in albino male rat 166 mg/kg body-weight, intraperitoneal LD50 in male monkeys 32 mg/kg body-weight. It has been shown to cause liver and kidney damage including cirrhosis of the liver in primates. Hsieh DP, Atkinson DN. Bisfuranoid mycotoxins: their genotoxicity and carcinogenicity. Adv Exp Med Biol. 1991;283:525-32. Review. Produced by several Aspergillus spp, including Aspergillus nidulans, Aspergillus flavus, Aspergillus ustus and Aspergillus versicolor, the last of which is associated with the production of sterigmatocystin in cheeses stored at low temperatures for extended periods of time. It is also produced by Bipolaris sorokiniana, Monocillium nordinii, Chaetomium thielarioideum and Chaetomium udagawae.


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  • Drug rashes: Drug interactions between steroids and anti-fungal drugs – (ecchymosis)

    Image A: Red skin rash on arms due to effect of inhaled steroids termed ecchymosis., Image B: Red skin rash on arms due to effect of inhaled steroids termed ecchymosis., Image C: Papular rash with blisters on the back, associated with CPA but prior to treatment, rash appeared 2 years previously in October 2007. The rash resolved on treatment with azoles., Image D: Papular rash with blisters on the back, associated with CPA but prior to treatment, rash appeared 2 years previously in October 2007. The rash resolved on treatment with azoles.

  • Reference: Muco-cutaneous retinoid effects and facial erythema related to the novel triazole antifungal agent voriconazole. Denning, DW & Griffiths, CEM. Clin.Exp Dermatol 2001, 26(8), 648-53.
    Courtesy of Dr D Denning, Wythenshawe Hospital, Manchester.(© Fungal Research Trust)

    Patient AB: Voriconazole rash. Following 8 weeks of Voriconazole, patient had remarkable facial erythema, most consistent with sun exposure because of sparing of her neck., Patient AB: Voriconazole rash. Following 8 weeks of Voriconazole, patient had remarkable facial erythema, most consistent with sun exposure because of sparing of her neck., Patient AB: Discoid lupus erythematosus following 12 months voriconazole therapy. This improved with use of sunblock factor 30 and resolved after discontinuation of voriconazole, 2 months later.

  • Micrographs of A. niger conidia & conidial heads provided by Amaliya Stepanova, Head of Laboratory pathomorphology and cytology at Kashkin Research Institute, Russian Federation.

    A niger conidial head TEM in vitro (РКПГF-1124), A niger mature conidium TEM in vitro (РКПГF-1124)

  • Micrographs of A. terreus conidia & conidial heads provided by Amaliya Stepanova, , Head of Laboratory pathomorphology and cytology at Kashkin Research Institute, Russian Federation.

    A terreus aleurospore TEM in vitro (РКПГF-1275), A terreus mature conidium SEM in vitro (РКПГ-1275), A terreus mature conidial head SEM in vitro

  • Micrographs of A. fumigatus conidia & conidial heads provided by Amaliya Stepanova, , Head of Laboratory pathomorphology and cytology at Kashkin Research Institute, Russian Federation.

    Conidial head (SEM), Part of conidial head (SEM), Mature conidia (SEM), Hyphae (SEM), Murine lung tissue (TEM)

  • Isolate from environmental sample

    A. clavatus, A. clavatus, A. clavatus

  • Patients has history of ABPA complicating long standing asthma. His total IgE has fluctuated between 2,200 and 4,600 KU/L, his Aspergillus IgE between 36.3 and 65.4 kAU/L and Aspergillus IgG from 87-154 mg/L. He has been taking long term itraconazole.

    December 2012, May 2012, AW CT Dec 2012 2, February 2010