(1S,3aS,4aR,4bS,5R,6aR,10aR,10bR,12aS)-5-(Acetyloxy)-1-(3-furanyl)-1,5,6,6a,7,10a,10b,11,12,12a,decahydro-4b,7,7,10a,12a,-pentamethyloxireno[c]phenanthro[1,2-d]pyran-3,8(3aH,4bH)-dione

DescriptionGedunin is a natural inhibitor of the heat shock protein (Hsp90; Item Nos. 22734 | 22735) co-chaperone p23 that also inhibits Hsp90 expression in human teratocarcinomal NTERA-2 cells in vitro at 5 μg/ml. This tetranortriterpenoid, which is isolated from A. indica, binds to and blocks the chaperone activity of p23 to induce apoptosis in HeLa-PRB cells in vitro at a concentration of 20 μM. Gedunin inhibits breast cancer cell proliferation in vitro, with IC50 values of 8.84 and 3.22 μM in MCF-7 and SKBr-3 cells, respectively, and inhibits the growth of PANC-1 pancreatic cancer cells (IC50 = 25 μM) by targeting the sonic hedgehog pathway to induce apoptosis. It also exerts anti-inflammatory effects in vivo. In a mouse model of articular inflammation induced by zymosan , gedunin (0.05-0.5 mg/kg, i.p.) reduces edema formation and the production of inflammatory cytokines. Gedunin (0.5 mg/kg) also inhibits the pleural accumulation of eosinophils and activated T lymphocytes in an ovalbumin-sensitized mouse model of allergic inflammation when administered prior to ovalbumin rechallenge. It also targets the lipopolysaccharide binding site and thus blocks Toll-like receptor 4 (TLR4) signaling in macrophages in vitro at a concentration of 10 μM.

UsesGedunin is a naturally occurring Hsp90 inhibitor. In vitro, Gedunin induces Hsp90-dependent client protein degradation and displays antiproliferative activity (IC50 values are 3.22, 8.84 and 16.8 μM in SKBr3, MCF-7 and CaCo-2 cancer cell lines respectively). Gedunin exhibits antimalarial activity against P. falciparum (IC50 values are 0.14 and 3.1 μM in parasite development and [3H]-hypoxanthine uptake assays respectively).