Rolapitant 是一种高效选择性具有口服活性的神经激肽 1 受体抑制剂，Ki值为0.66 nM。

Rolapitant Hydrochloride is the hydrochloride salt form of rolapitant, an orally bioavailable, centrally-acting, selective, neurokinin 1 receptor (NK1-receptor) antagonist with potential antiemetic activity. Upon oral administration, rolapitant competitively binds to and blocks the activity of the NK1-receptor in the central nervous system, thereby inhibiting the binding of the endogenous ligand, substance P (SP). This may prevent both SP-induced emesis and chemotherapy-induced nausea and vomiting (CINV). The interaction of SP with the NK1-receptor plays a key role in the induction of nausea and vomiting caused by emetogenic cancer chemotherapy. Compared to other NK1-receptor antagonists, rolapitant has both a more rapid onset of action and a much longer half-life.

Rolapitant has a high affinity for the human NK1 receptor with a Ki of 0.66 nM and high selectivity over the human NK2 and NK3 subtypes of more than 1000-fold. Rolapitant has a preferential affinity for human, guinea pig, gerbil, and monkey NK1 receptors over rat, mouse, and rabbit[1].

Rolapitant reverses NK1 agonist-induced foot tapping in gerbils following both intravenous and oral administration up to 24 hours at a minimal effective dose (MED) of 0.1 mg/kg. Rolapitant is active at 0.1 and 1 mg/kg in both acute and delayed emesis models in ferrets, respectively which is the same as clinical data for other NK1 antagonists. The clinical efficacy of anti-emetics is highly correlated with efficacy in the ferret emesis model, suggesting rolapitant is a viable clinical candidate for this indication[1].

Rolapitant is made at a stock concentration of 1 mM in 100% DMSO. For most receptor binding studies, the stock solution is diluted with the final concentrations ranged from 0.1 to 3 μM. Radioligand concentrations for competition binding studies ranged from 0.5 to 1 nM. For species comparison studies, 150 pM [125I]-BHSP is incubated with varying concentrations of protein (10-50 μg) prepared from gerbil, rabbit and monkey striata, and from cells expressing cloned rat, mouse and guinea pig NK receptors[1].

552292-08-7

C25H26F6N2O2

500.48

SCH619734;罗拉吡坦;罗拉匹坦

DMSO:30 mg/mL (59.94 mM)
Powder: -20°C for 3 years
In solvent: -80°C for 2 years