210421-74-2
中文名稱
西他生坦鈉
英文名稱
Sitaxentan sodium
CAS
210421-74-2
分子式
C18H14ClN2NaO6S2
分子量
476.89
MOL 文件
210421-74-2.mol
更新日期
2025/02/06 17:31:07
210421-74-2 結構式
基本信息
中文別名
西他生坦鈉司他生坦鈉
西他塞坦鈉
心腦血管類原料藥
西他塞坦鈉/司他生坦鈉
(4-氯-3-甲基-1,2-惡唑-5-基)-[2-[2-(6-甲基-1,3-苯并二氧戊環(huán)-5-基)乙?；鵠噻吩-3-基]磺酰亞胺鈉鹽
(4-氯-3-甲基異惡唑-5-基)((2-(2-(6-甲基苯并[D][1,3]二氧雜戊環(huán)-5-基)乙?；?噻吩-3-基)磺酰基)胺鈉鹽
英文別名
CS-777CS-338
Thelin
TBC-11249
TBC-11250
TBC-11251 sodium
sitaxentan sodiuM
SITAXSENTAN SODIUM
TBC11251 sodiuM salt
Sitaxentan sodium salt
所屬類別
生物化工：Endothelin Receptor 拮抗劑常見問題列表
簡介
西他生坦鈉為一種小分子化合物，主要通過抑制內(nèi)皮素(Endothelin) 的作用而產(chǎn)生治療作用（內(nèi)皮素能調節(jié)血管收縮及血管平滑肌的生長）。其對內(nèi)皮素A受體的作用是對B型內(nèi)皮素受體作用的6500倍，高選擇性的內(nèi)皮素A受體拮抗劑能增加血流與反轉血管收縮。生物活性
Sitaxentan sodium是一種選擇性的endothelin A receptor (ETA)(內(nèi)皮素受體A）拮抗劑，IC50和Ki分別為1.4 nM和0.43 nM，比作用于ETB選擇性高7000倍。Phase 3。體外研究
Sitaxentan sodium inhibits ET-1-induced stimulation of phosphoinositide turnover with a Ki of 0.69 nM and a pA2 of 8.0.體內(nèi)研究
Sitaxentan sodium has a serum half-life in the rat and the dog of 6 hours - 7 hours and 60?100% oral bioavailability. Orally administered Sitaxentan sodium is rapidly absorbed in both the rat and the dog with a t1/2(abs) of 0.7 hours and 0.3 hours, respectively. Peak plasma concentrations occurred between 2 hours and 3 hours postdosing in the rat and between 45 minutes and 90 minutes in the dog. The pulmonary vasoconstrictor response to acute hypoxia (10% O2 for 90 minutes) is prevented with Sitaxentan sodium (5 mg/kg infused i.v. 10 minutes prior to the onset of hypoxia). Sitaxentan sodium delivered i.v. 50 minutes after the onset of hypoxia reverses the established pulmonary vasoconstriction. Sitaxsentan blocks increased plasma endothelin levels. Sitaxsentan dose dependently (10 mg/kg and 50 mg/kg per day in the drinking water) attenuates right ventricular systolic pressure, right heart hypertrophy, and pulmonary vascular remodeling observed 3 weeks after a single subcutaneous injection of monocrotaline. Systemic administration of the ETA receptor antagonist Sitaxentan sodium significantly attenuates cerebral vasospasm after subarachnoid hemorrhage (SAH). Sitaxentan sodium reduces the development of hypoxic pulmonary vasoconstriction (HPV) in the pig. In addition, bolus injection of Sitaxentan sodium reverses already established HPV.不良反應
西他生坦鈉常見的不良反應為頭痛、外周水腫。