LML134 (化合物 18b) 是一种具有口服活性，高选择性 H3R (组胺 3 受体) 反向激动剂，对 hH3R 的 cAMP 和 bdg 的 Kis 分别为 0.3 nM 和 12 nM。LML134 快速穿透大脑，导致高 H3R 占有率，并以快速的动力学特征使其目标脱离。LML134 用于治疗过度睡眠障碍。
LML134 (compound 18b) is an orally active and high selective Histamine 3 receptor (H3R) inverse agonist with Kis of 0.3 nM and 12 nM for hH3R cAMP and hH3R bdg. LML134 penetrates the brain rapidly, leading to high H3R occupancy, and disengages its target with a fast kinetic profile. LML134 is for the treatment of excessive sleep disorders[1].
LML134 (compound 18b) (oral; 10 mg/kg) indicates rapid oral absorption, with a Tmax of 0.5 hours, t1/2 of 1.54 hours and a fraction absorbed of 44%, as well as a rapid clearance in male Sprague-Dawley rats[1]. LML134 (i.v.; 1 mg/kg) has t1/2 of 0.44 hours, CL of 28 mL/min/kg and the low plasma protein binding in male Sprague-Dawley rat (Fu =39.0%)[1].
[1]. Troxler T, et al. The Discovery of LML134, a Histamine H3 Receptor Inverse Agonist for the Clinical Treatment of Excessive Sleep Disorders. ChemMedChem. 2019 Jul 3;14(13):1238-1247.
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