Abstract
Pharmacomodulation of the torasemide molecule, a loop diuretic inhibiting Na+ 2Cl− K+ co-transport in the thick ascending limb of the loop of Henlé has been performed in order to obtain new long-acting diuretics. The aim of this study was to decrease the metabolism of the drug and to slow down its rate of excretion by increasing its hydrophobicity. The present study describes the synthesis and the inhibitory potency of new torasemide derivatives in the bioassay system of the cortical thick ascending limb of rabbit. A correlation between the lipophilicity (log P') of these substances and their activity as inhibitors of the Na+ Cl− K+ co-transporter was observed. The present design led to compounds more active than torasemide. Structure-activity relationships permit us to propose an interaction model between torasemide derivatives and the Na+ 2Cl− K+ co-transport system of the cortical thick ascending limb.
摩尔卡西尼酸分子的药物调节,一种抑制髓袢厚壁升支肢上的Na+ 2Cl− K+共转运的环利尿剂已经进行,以获得新的长效利尿剂。本研究旨在通过增加其疏水性来降低药物的代谢并减慢其排泄速率。本研究描述了新摩尔卡西尼酸衍生物在兔子皮质厚壁升支肢生物测定系统中的合成和抑制效力。观察到这些物质的亲脂性(log P')与它们作为Na+ Cl− K+共转运抑制剂的活性之间的相关性。目前的设计导致比摩尔卡西尼酸更活跃的化合物。结构活性关系使我们能够提出摩尔卡西尼酸衍生物与皮质厚壁升支肢的Na+ 2Cl− K+共转运系统之间的相互作用模型。