A fungal metabolite with immunosuppressive properties, blocks phagocytosis, cytokine production and proliferation of T and B cells.1 Inhibits chymotrypsin-like activity of 20S proteasome preventing IkappaBalpha degradation and preventing NF-kappaB degradation2. Displays antiinflammatory activity3 and blocks leukotriene B4 production via inhibition of LTA4 hydrolase4. It inhibits nuclear NOTCH2 and recovers a tumor-suppressor NOTCH3 activity in chronic lymphocytic leukemia cells.5
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