Simotaxel (MST 997) is an orally active derivative of the taxane class. Simotaxel binds to β-tubulin and promotes tubulin polymerization (EC₅₀ = 0.9 μM), inhibits tubulin depolymerization, and causes cell cycle arrest at the G₂-M phase. Simotaxel disrupts the formation of the mitotic spindle and triggers the caspase-dependent apoptotic pathway (apoptosis). Simotaxel has inhibitory effects on Paclitaxel sensitive cell lines and overcomes drug resistance. Simotaxel can be used to study Paclitaxel / Docetaxel resistant solid tumors.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.