Secondary metabolites, structure diagram: Trivial name - Gregatin A

Date: 26 November 2013

Secondary metabolites, structure diagram: Trivial name – Gregatin A

Notes:

Species: A. panamensisSystematic name: 3(2H)-Furanone, 2-(1E,3E)-1,3-hexadienyl-5-methoxy-2-methyl-4-[(2E)-1-oxo-2-butenyl]-, (-)-Molecular formulae: C16H20O4Molecular weight: 276Chemical abstracts number: 65794-79-8Selected references: Anke, H.; Schwab, H.; Achenbach, H. Metabolic products of microorganisms. 197. Investigations on metabolites of microorganisms. 23. Tetronic acid derivatives from Aspergillus panamensis. Production, isolation, characterization and biological activity. Journal of Antibiotics (1980), 33(9), 931-9.

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Aspergillus fumigatus Fresen

Aspergillus fumigatus Fresen
Aspergillus flavus

Aspergillus flavus
Aspergillus flavus

Aspergillus flavus
Aspergillus flavus Link. A colonies after 1 weekB,C conidial heads x 920D Conidia x920 E Conidial head x920

Aspergillus flavus Link. A colonies after 1 weekB,C conidial heads x 920D Conidia x920 E Conidial head x920
Aspergillus cretensis

Conidia
Aspergillus cretensis

Seven-day-old cultures on CYA
Aspergillus cretensis

Conidiophores
Aspergillus clavatus

A colour enhanced image.
Cerebral aspergillosis – CT scans, CLL patient DS.

Patient diagnosed with Stage C Chronic Lymphocytic Leukaemia, treated in the MRC CLL4 study, with prednisolone for 4 weeks followed by oral chlorambucil for 7 days. Patient developed severe pneumonia due to pseudomonas and staphylococcus. Following treatment with broad spectrum antibiotics and 1 week of Abelcet, patient was readmitted with headache, disorientation and fever. CT brain scans showed 3 ring enhancing lesions, aspirated material showed neutrophils but grew aspergillus. Patient now improved on Abelcet (4 mg/kg) and oral itrconazole suspension 200mg b.d.

Thanks to Richard Chasty, Consultant Haematologist, North Staffordsire Hospital, UK.

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