Bis(methylthio)gliotoxin (FR-49175) is a toxic metabolite with anthiphagocytic and immunosuppressive properties synthesized by pathogenic fungi such as Aspergillus fumigatus. Bis(methylthio)gliotoxin (FR-49175) is an analog of gliotoxin known to inhibit PAF-induced platelet aggregation and collagen-aggregation, but has no activity with arachidonic or ADP induced aggregation. Shown to speed up PAF hydrolysis and inhibit PAF-mediated caspase 3 activation. From guinea-pig experiments, reported to Inhibit PAF-induced bronchoconstriction.
