Renal-selective prodrugs are described which are preferentially converted in the kidney to compounds capable of inhibiting synthesis of catecholamine-type neurotransmitters involved in renal sympathetic nerve activity. The prodrugs described herein are derived from inhibitor compounds capable of inhibiting one or more of the enzymes involved in catecholamine synthesis, such compounds being classifiable as tyrosine hydroxylase inhibitors, or as dopa-decarboxylase inhibitors, or as dopamine-&bgr;-hydroxylase inhibitors. These inhibitor compounds are linked to a chemical moiety, such as a glutamic acid derivative, by a cleavable bond which is recognized selectively by enzymes located predominantly in the kidney. The liberated inhibitor compound is then available in the kidney to inhibit one or more of the enzymes involved in catecholamine synthesis. Inhibition of renal catecholamine synthesis can suppress heightened renal nerve activity associated with sodium-retention related disorders such as hypertension. Conjugates of particular interest are glutamyl derivatives of dopamine-&bgr;-hydroxylase inhibitors, of which N-acetyl-&ggr;-glutamyl fusaric acid hydrazide (shown below) is preferred.
1
本文描述了一种肾选择性的前药,其在肾脏中优先转化为能够抑制参与肾交感神经活动的
儿茶酚型神经递质合成的化合物。本文所描述的前药来源于能够抑制
儿茶酚合成中的一个或多个酶的
抑制剂化合物,这些化合物可分类为
酪氨酸羟化酶
抑制剂,多巴
脱羧酶
抑制剂或
多巴胺-&bgr;-羟化酶
抑制剂。这些
抑制剂化合物通过可被肾脏中大量存在的酶选择性识别的可裂解键与
化学基团(如谷
氨酸衍
生物)连接。释放的
抑制剂化合物然后可在肾脏中用于抑制
儿茶酚合成中的一个或多个酶。抑制肾脏
儿茶酚合成可抑制与
钠潴留相关的疾病(如高血压)相关的增强肾脏神经活动。特别感兴趣的共轭物是
多巴胺-&bgr;-羟化酶
抑制剂的谷
氨酰衍
生物,其中
N-乙酰-&ggr;-谷
氨酰富萨酸
肼(如下图所示)是首选。1