title: Apparent relationships between toxins elaborated by the cyanobacterium Trichodesmium erythraeum and those present in the flesh of the narrow-barred Spanish mackerel Scomberomorus commersoni.
abstract: The marine cyanobacterium Trichodesmium erythraeum contains toxic water-soluble material that produces signs in mice similar to those produced by water-soluble extracts of the flesh of a specimen of pelagic fish Scomberomorus commersoni from a batch that had been implicated in a poisoning resembling ciguatera. Extracts of water-soluble material from both the cyanobacterium and the fish contained toxins that were chromatographically indistinguishable. A peptide and an alkaloid were detected in partially purified extracts of the water-soluble material. In addition to this material toxic lipid-soluble material was present in some batches of T. erythraeum. Elution of this material with 9:1 chloroform:methanol using column chromatography produced material that was chromatographically indistinguishable from ciguatoxin-like material from S. commersoni and produced signs in mice similar to those produced by this material. Elution of the lipid-soluble material with 97:3 chloroform:methanol yielded a toxin resembling in its chromatographic and toxic properties a scaritoxin-like substance from S. commersoni. Other toxins with Rf values lying between that of the ciguatoxin-like material and that of the scaritoxin-like material were also detected in extracts of T. erythraeum. It is postulated that T. erythraeum is the progenitor of major toxins carried by some ciguateric fish and that water-soluble toxins released into the ambient sea water by T. erythraeum may constitute a health hazard for humans.
authors.affiliation: Department of Zoology, University of Queensland, St Lucia, Australia.
authors.forename: R
authors.initials: R
authors.lastname: Endean
authors.forename: S A
authors.initials: SA
authors.lastname: Monks
authors.forename: J K
authors.initials: JK
authors.lastname: Griffith
authors.forename: L E
authors.initials: LE
authors.lastname: Llewellyn
mesh_terms: D000818:Animals; D002855:Chromatography, Thin Layer; D000458:Cyanobacteria / Q000737:chemistry* / Q000648:ultrastructure; D005399:Fishes / Q000378:metabolism*; D008387:Marine Toxins / Q000737:chemistry* / Q000302:isolation & purification; D008460:Meat / Q000032:analysis*; D008855:Microscopy, Electron, Scanning; D012623:Seawater / Q000032:analysis; D013056:Spectrophotometry, Ultraviolet
chemical_list: D008387:Marine Toxins