cp-100356

MRT-92 is a potent and selective Smoothened (Smo) receptor inhibitor. MRT-92 displays subnanomolar antagonist activity against Smo in various Hh cell-based assays. MRT-92 inhibits rodent cerebellar granule cell proliferation induced by Hh pathway activation through pharmacologic (half maximal inhibitory concentration [IC50] = 0.4 nM) or genetic manipulation. Smo is the target of anticancer drugs that bind to a long and narrow cavity in the 7-transmembrane (7TM) domain.

CP-100356 hydrochloride is an orally active, low micromolar dual inhibitor of MDR1 (P-gp) and BCRP, a nucleotide-derived substrate analogue that inhibits MDR1-mediated Calcein-AM and BCRP-mediated Prazosin transporters. Additionally, CP-100356 inhibits OATP1B1 and induces stomatal opening in the dark.

CP 100356 is a specific inhibitor of MDR1 (P-Gp), the protypical ABC transporter. The compound has low uM to nM potency for inhibiting several MDR-1 substrates (calcein-AM, digoxin) in transfected MDCKII cells.