Losartan is an angiotensin II receptor antagonist, competing with the binding of angiotensin II to AT1 receptors with IC50 of 20 nM.
体外研究
Losartan competes with the binding of angiotensin II to AT1 receptors. The concentration that inhibits 50% of the binding of angiotensin II (IC50) is 20 nM. Losartan (40 μM) affects ISC but prevents the effect of ANGII on ISC. Losartan significantly reduces Ang II-mediated cell proliferation in endometrial cancer cells. The combination of losartan and anti-miR-155 has a significantly greater antiproliferative effect compared to each drug alone.
体内研究
Losartan (0.6 g/L, p.o.) -treated Fbn1 mice show a reduction in distal airspace caliber relative to placebo-treated Fbn1 animals. The doses of losartan and propranolol are titrated to achieve comparable hemodynamic effects. Analysis of pSmad2 nuclear staining reveals that losartan antagonizes TGF-β signaling in the aortic wall of Fbn1 mice. Losartan can improve disease manifestations in the lungs, an event that cannot plausibly relate to improved hemodynamics. Losartan (10 mg/kg, intraarterial injection) increases blood angiotensin levels four- to sixfold. Losartan (10 mg/kg, i.p.) increases plasma renin levels 100-fold; plasma angiotensinogen levels decreases to 24% of control; and plasma aldosterone levels are unchanged.
分子式
C22H23ClN6O
分子量
422.91
CAS号
114798-26-4
中文名称
氯沙坦;洛沙坦;络沙坦
运输条件
Room temperature in continental US; may vary elsewhere.
储存方式
2-8°C, protect from light
* In solvent : -80°C, 6 months; -20°C, 1 month (protect from light)