A less toxic, potent, synthetic derivative of the ansamycin benzoquinone antibiotic Geldanamycin Streptomyces hygroscopicus (Cat. No. 345805) that binds to Hsp90 (EC50 = 7.2 µM) and regulates its function. Reported to induce apoptosis and exhibit anti-tumor properties (IC50 = 4.1 nM in SKBR3 and 5.2 nM in MCF7 cells). Depletes cancer cells of erbB-1, erbB-2 (EC50 = 45 nM), mutant p53, (EC50 = 62 nM), Raf-1 (EC50 = 80 nM), and Akt. Hence, inhibits the Ras/Raf/MEK and PI3-Kinase signaling pathways. Shown to sensitize cancer cells to Paclitaxel (Cat. No. 580555) and Doxorubicin (Cat. No. 324380), and down-regulates vascular endothelial factor expression.
500 μg in Plastic ampoule
Packaged under inert gas
Cell permeable: no
EC50 = 7.2 µM for Hsp90
Product does not compete with ATP.
Toxicity: Standard Handling (A)
Following reconstitution aliquot and freeze (-20°C). Stock solutions are stable for up to 3 months at -20°C.
Basso, A.D., et al. 2002. Oncogene21, 1159.
Clarke, P.A., et al. 2002. Oncogene19, 4125.
Clarke, P.A., et al. 2000. Oncogene19, 4125.
Schulte, T.W., and Neckers, L.M. 1998. Cancer Chemother. Pharmacol.42, 273.
Schnur, R.C., et al. 1995. J. Med. Chem.38, 3806.
CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany
GRANUCULT is a registered trademark of Merck KGaA, Darmstadt, Germany