| Description | EMPA is a selective, high-affinity and reversible antagonist of orexin OX2 receptor(human and rat OX2-HEK293 membranes with KD values of 1.1 and 1.4 nM respectively) |
| In vitro | EMPA在含有人类和大鼠OX2受体的细胞膜上置换EMPA结合位点,其Ki值分别为1.10±0.24 nM和1.45±0.13 nM。在针对人类和小鼠V1a受体的结合实验中,EMPA的IC50值分别为5.75 μM和12.8 μM,Ki值分别为2.63 μM和5.8 μM。在稳定表达hOX2受体的CHO(dHFr-)细胞中,EMPA对orexin-A和orexin-B诱导的[Ca2+]i反应抑制作用的IC50分别为8.8±1.7 nM和7.9±1.7 nM。EMPA以竞争性方式拮抗在hOX2受体上orexin-A和orexin-B诱导的肌醇磷酸(IP)累积,其pA2值分别为8.6和8.8。 |
| In vivo | EMPA(3-30 mg/kg;腹腔内)显著且剂量依赖地降低了法国和雄性Wistar大鼠LMA的基线水平。EMPA(3-30 mg/kg;腹腔内)与对照车辆处理的动物相比,清晰地展示了对自发活动的剂量依赖性抑制。此外,EMPA(1-300 mg/kg;腹腔内)剂量依赖性地逆转了由[Ala11,D-Leu15]orexin-B引起的超动力现象,却不显著影响雄性NMRI小鼠的运动活动(LMA)。 |
| molecular weight | 454.54 |
| Molecular formula | C23H26N4O4S |
| CAS | 680590-49-2 |
| Storage | Powder: -20°C for 3 years | In solvent: -80°C for 1 year |
| Solubility | DMSO: 230 mg/mL (506 mM), Sonication is recommended. |
| References | 1. P Malherbe, et al. Biochemical and behavioural characterization of EMPA, a novel high-affinity, selective antagonist for the OX |