The problem to be solved by the present invention is to provide a compound suitable for a pharmaceutical composition, specifically an agent for treating nocturia.
The inventors have assumed that inhibition of nocturnal activity of placental leucine aminopeptidase (P-LAP), i.e. aminopeptidase that cleaves AVP, would maintain and/or increase an endogenous AVP level to enhance the antidiuretic effect, which would contribute to a decreased number of nocturnal voids, and have extensively studied compounds which inhibit P-LAP. As a result, the inventors have found that (2R)-3-amino-2-(pyridylmethyl)-2-hydroxy-propanoic acid derivatives have excellent P-LAP inhibitory activity. The inventors have evaluated antidiuretic effects in water-loaded rats and have found that the compounds increase endogenous AVP levels by inhibiting P-LAP and consequently reduce urine production. The present invention therefore provides compounds expected to be used as an agent for treating nocturia based on P-LAP inhibition.
本发明要解决的问题是提供一种适用于药物组合物的化合物,特别是一种治疗夜尿症的药物。
本发明者假定,抑制胎盘亮
氨酸
氨肽酶(P-
LAP)(即裂解 A
VP 的
氨肽酶)的夜间活性将维持和/或增加内源性 A
VP 水平,从而增强抗利尿作用,这将有助于减少夜间排尿次数,并对抑制 P-
LAP 的化合物进行了广泛研究。结果,本发明人发现(2R)-3-
氨基-2-(
吡啶基
甲基)-2-羟基
丙酸衍
生物具有极佳的 P-
LAP 抑制活性。本发明者评估了
水负荷大鼠的抗利尿作用,发现这些化合物通过抑制 P-
LAP 增加了内源性 A
VP 水平,从而减少了尿量。因此,本发明提供的化合物有望用作基于 P-
LAP 抑制作用的夜尿症治疗剂。