Vermisporin
Vermisporin, a new antibiotic produced by fermentation of the fungus ophiobolus vermisporis. Vermisporin has antimicrobial activity, which MICs for enterobacteriaceae, pseudomonas aeruginosa and haemophilus influenzae exceeds 64 micrograms/ml; which MBCs is 16- to 32-fold above the MICs.
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to
24 months(2-8C).
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
Need more advice on solubility, usage and handling? Please email to: service@chemfaces.com
The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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Eur J Clin Microbiol Infect Dis. 1992 Aug;11(8):755-7.
In vitro antimicrobial activity of the new antibiotic vermisporin.[Pubmed:
1425739]
The antimicrobial activity of Vermisporin, a new antibiotic produced by fermentation of the fungus Ophiobolus vermisporis, was tested in vitro.
METHODS AND RESULTS:
Vermisporin inhibited 90% of Bacteroides fragilis and other Bacteroides spp. at 1 microgram/ml (range 0.25-1 micrograms/ml). Clostridium perfringens were inhibited by 1 microgram/ml (range 0.25-2 micrograms/ml). Vermisporin inhibited 90% of Staphylococcus aureus, including methicillin-resistant Staphylococcus aureus, at 0.5 micrograms/ml (range 0.12-0.5 micrograms/ml).
CONCLUSIONS:
Vermisporin MICs for group A, B, C, F and G streptococci were < 1 microgram/ml when tested in Haemophilus Test Medium but > or = 8 micrograms/ml in the presence of blood. Vermisporin MICs for Enterobacteriaceae, Pseudomonas aeruginosa and Haemophilus influenzae exceeded 64 micrograms/ml. Inhibited organisms had MBCs 16- to 32-fold above the MICs.
J Antibiot (Tokyo). 2005 May;58(5):338-45.
Spylidone, a novel inhibitor of lipid droplet accumulation in mouse macrophages produced by Phoma sp. FKI-1840.[Pubmed:
16060386]
METHODS AND RESULTS:
During our screening for microbial inhibitors of lipid droplet accumulation in macrophages, a new compound designated spylidone was isolated along with two structurally related known compounds, PF1052 and Vermisporin, from the fermentation broth of Phoma sp. FKI-1840 by solvent extraction, silica gel column chromatography, ODS column chromatography and preparative HPLC. From the structure elucidation, spylidone has a spiro ring containing 2,4-pyrrolidinedione.
CONCLUSIONS:
Among the three compounds, only spylidone was found to inhibit lipid droplet accumulation in macrophages at 10 to approximately 50 microM without any cytotoxic effect.
