Ramelteon is a highly potent and selective melatonin receptor agonist with Ki values of 14 and 112 pM for human melatonin1 and melatonin2.
IC50&Target
IC50: 14 pM (melatonin1), 112 pM (melatonin2)
体外研究
Ramelteon shows very high affinity for human melatonin1 and melatonin2 receptors (expressed in CHO cells), and chick forebrain melatonin receptors (consisting of melatonin1 and melatonin2 receptors) with Ki values of 14.0, 112, and 23.1 pM, respectively. The affinity of ramelteon for hamster brain melatonin3 binding sites is extremely weak (Ki: 2.65 μM) compared to melatonin's affinity for the melatonin3 binding site Ki: 24.1 nM). In addition, ramelteon shows no measurable affinity for a large number of ligand binding sites (including benzodiazepine receptors, dopamine receptors, opiate receptors, ion channels, and transporters) and no effect on the activity of various enzymes. Ramelteon inhibits forskolin-stimulated cAMP production in the CHO cells that express the human melatonin1 and melatonin2 receptors.
体内研究
Ramelteon significantly decreases wakefulness at doses of 0.001, 0.01, and 0.1 mg/kg, increases slow-wave sleep at doses of 0.001, 0.01, and 0.1 mg/kg, and increases rapid eye movement sleep at a dose of 0.1 mg/kg in freely moving cats. Ramelteon is associated with reduced subjective sleep latency and improved sleep quality. Ramelteon is associated with improvement in latency to persistent sleep, sleep efficiency , and total sleep time. Ramelteon (10 mg/kg, i/p), administered close to the mid-point of the dark phase of the L:D cycle, significantly reduces NREM sleep latency (time from injection to the appearance of NREM sleep). Ramelteon also produces a short-lasting increase in NREM sleep duration, but the NREM power spectrum is unaltered.
分子式
C16H21NO2
分子量
259.34
CAS号
196597-26-9
中文名称
雷美替胺;瑞美替昂;拉米替隆;雷美尔通;瑞美替胺
运输条件
Room temperature in continental US; may vary elsewhere.