and CA XII. The carbonic anhydrase (CA) inhibitory activities of newly synthesized pyrazoline-linked benzenesulfonamides 18–33 against human CA (hCA) isoforms I, II, IX, and XII were measured and compared with that of acetazolamide (AAZ), a standard inhibitor. Potent inhibitory activity against hCA I was exerted by compounds 18–25, with inhibition constant (KI) values of 87.8–244.1 nM, which were greater
碳酸酐酶(CA,
EC 4.2.1.1)是
锌金属酶,存在于大多数活
生物体中。催化活性同工型包括胞质CA I和II,以及与肿瘤相关的CA IX和CA XII。
碳酸酐酶(CA)新合成的
吡唑啉
联苯磺酰胺的抑制活性18 - 33针对人CA(HCA)亚型I,II,IX,XII和测量,并与
乙酰唑胺(
AAZ),一个标准的
抑制剂相比较。化合物18 – 25对hCA I的抑制作用强,抑制常数(K I)值为87.8–244.1 nM,大于
AAZ(K I,250.0 nM)。化合物19,21,22,29,30,和32被证明具有抗HCA IX具有K抑制活性予了比更有效或几乎等于
AAZ(K值(5.5-37.0 nM)的我,25.0纳米)。与
AAZ(K I,5.7 nM)相比,化合物20 – 22和30对hCA XII具有强大的抑制活性(K I s,7.1–10.1 nM)。