124750-92-1

基本信息
氯沙坦羧酸
5-羧酸洛沙坦
洛沙坦-5-羧酸
EXP 317
exp3174
l-158641
AKOS 91941
Losartan acid
LOSARTAN CARBOXY ACID
Losartan Carboxylic Acid
’-biphenyl)-4-yl)methyl)-
EXP 3174 (LOSARTAN CARBOXYLIC ACID)
物理化学性质
常见问题列表
药理作用:氟沙坦能特异性的拮抗血管紧张素ⅡAT1受体,阻断了循环和局部组织中血管紧张素Ⅱ(AGⅡ) 所致的动脉血管收缩、交感神经兴奋和压力感受器敏感性增加等效应,强力和持续性降低血压,使收缩压和舒张压下降。尚可减轻左心室肥厚,抑制心肌细胞增生,延迟或逆转心肌重构,改善左室功能。对血糖、血脂代谢无不利影响。其还具有改善肾血流动力学作用,减轻肾血管阻力,选择性扩张出球小动脉,降低肾小球内压力,降低蛋白尿,增加肾血流量和肾小球滤过率,保护肾脏而延缓慢性肾功能不全的过程,特别对糖尿病肾病的恶化有逆转作用。
用途:用于原发性高血压和充血性心力衰竭。

图1为氟沙坦的合成路线
有关氟沙坦的抗高血压药、合成路线、注意事项、不良反应、药代动力学是由Chemicalbook的灿灿编辑整理。(2016-02-03)
Angiotensin II receptor type 1
The specific binding of [125I]-angiotensin II to VSMC is inhibited by Losartan Carboxylic Acid (E-3174) with an IC 50 of 1.1 nM. Losartan Carboxylic Acid abolishes the angiotensin II-induced formation of inositolphosphates in VSMC. Losartan Carboxylic Acid inhibits the angiotensin II-induced elevation of intracellular cytosolic Ca2+ concentration with an IC 50 of 5 nM. Losartan Carboxylic Acid is more effective than losartan in blocking the angiotensin II-induced increase in Egr-1 mRNA. Losartan Carboxylic Acid inhibits the angiotensin II-induced cell protein synthesis with an IC 50 of 3 nM.
Losartan Carboxylic Acid (E-3174) (0.1 mg/kg; i.v. followed by 0.02 mg/kg/h for 5.5 h) induces a similar level of inhibition (87±4%) of the pressor responses to angiotensin I.
Intravenous Losartan Carboxylic Acid (0.1 mg/kg+0.01 mg/kg/min) is infused in anesthetized dogs with recent (8.1±0.4 days) anterior myocardial infarction. Electrolytic injury of the left circumflex coronary artery to induce thrombotic occlusion and posterolateral ischemia is initiated 1 h after the start of treatment.
Animal Model: | Mongrel dogs of either sex, weighing 15-25 kg |
Dosage: | 0.1 mg/kg (followed by 0.02 mg/kg/h) |
Administration: | i.v. for 5.5 hours |
Result: | The pressor response was reduced by 87±4%. |