EMPA is a high-affinity, reversible and selective orexin OX2 receptor antagonist. [H]EMPA binds to human and rat OX2-HEK293 membranes with KD values of 1.1 and 1.4 nM respectively.
IC50&Target
OX2 Receptor
体外研究
EMPA competitively antagonizes orexin-A-and orexin-B-evoked accumulation of [H]inositol phosphates (IP) at hOX2 receptors with pA2 values of 8.6 and 8.8 respectively.
EMPA displaces the [H]EMPA binding from cell membranes containing human and rat OX2 receptors, with Ki values of 1.10±0.24 nM and 1.45±0.13 nM, respectively.
EMPA shows an IC50=5.75 µM, Ki=2.63 µM, and IC50=12.8 µM, Ki=5.8 µM in the binding assay at human and mouse V1a receptors, respectively.
In CHO(dHFr) cells stably expressing hOX2 receptors, EMPA inhibits orexin-A-or orexin-B-evoked [Ca]i response with IC50s of 8.8±1.7 nM and 7.9±1.7 nM, respectively.
体内研究
EMPA (1-300 mg/kg; i.p.) dose-dependently reverses this [Ala,D-Leu]orexin-B-induced hyperlocomotion without itself significantly affecting locomotor activity (LMA) in male NMRI mice.
EMPA (3-30 mg/kg; i.p.) induces a significant and dose-dependent reduction in the baseline LMA in france and male Wistar rats. EMPA (3-30 mg/kg; i.p.) demonstrates a clear dose-dependent inhibition of spontaneous activity as compared with vehicle-treated animals.
Animal Model:
Male NMRI mice (20-30 g)
Dosage:
1, 3, 10, 30, 100, 300 mg/kg
Administration:
Injected i.p. at a volume of 10 mL/kg
Result:
Dose-dependently reversed this [Ala,D-Leu]orexin-B-induced hyperlocomotion without itself significantly affecting LMA.
Animal Model:
France and Male Wistar rats (196-237 g)
Dosage:
3, 10, 30 mg/kg
Administration:
Injected i.p. at a volume of 5 mL/kg
Result:
Induced a significant and dose-dependent reduction in the baseline LMA.
Demonstrated a clear dose-dependent inhibition of spontaneous activity as compared with vehicle-treated animals.
分子式
C27H34N4O4S
分子量
454.54
CAS号
680590-49-2
运输条件
Room temperature in continental US; may vary elsewhere.