A macrocyclic trichothecene mycotoxin from Myrothecium sp. It is a potent and selective inhibitor of the steroid receptor coactivator-3 and selectively down-regulates its expression.1 It is cytotoxic to multiple types of cancer cells at low nM concentrations (IC50=4.9 nM for HepG2 cells) but not toward normal liver cells.1,2 It enhances TNFalpha-induced3 and TRAIL-induced apoptosis4. It reduces phosphorylation of IREalpha and inhibits tunicamycin-induced ER stress in FaO rat liver cells.5
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