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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Effect of toxins on arachidonic acid metabolism in rat cultured pulmonary alveolar macrophages.

The action of a trichothecene (T-2), microcystin-LR and saxitoxin on arachidonic acid metabolism in cultured rat alveolar macrophages was studied. Pulmonary macrophages exposed to T-2 trichothecene were stimulated to synthesize and release large amount of thromboxane B2 (TxB2) and 6-Keto F1 alpha. Microcystin-LR induced significant release of prostaglandins F2 alpha (140%), PGE2 (175%) and TxB2 (169%) compared to controls. Saxitoxin induced TxB2 release by 37%. Arachidonic acid release was stimulated by all three toxins. The release of arachidonic acid and its metabolites in alveolar macrophages exposed to T-2 toxin was partially blocked by fluocinolone (1 microM). These results suggest that macrophages synthesize and release inflammatory mediators in response to toxin exposure, and fluocinolone may protect against T-2 toxicosis.[1]


  1. Effect of toxins on arachidonic acid metabolism in rat cultured pulmonary alveolar macrophages. Naseem, S.M., Hines, H.B., Creasia, D.A. Biochem. Int. (1989) [Pubmed]
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