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CAIX inhibitor S4 is an inhibitor of carbonic anhydrase IX (CAIX; Ki = 0.007 µM for the recombinant human enzyme).1 It is selective for CAIX over CAI and CAII but does inhibit CAXII (Kis = 5.6, 0.55, and 0.002 µM, respectively). CAIX inhibitor S4 inhibits proliferation of HT-29 and MDA-MB-231, but not HCT116, cancer cells under anoxic conditions (IC50s = 20, 481, and >1,000 µM, respectively). CAIX inhibitor S4 (10 mg/kg, i.p.) reduces the number of lung metastases, but not primary tumor growth, in an MDA-MB-231 mouse xenograft model.
WARNING This product is not for human or veterinary use.
1. Antimetastatic effect of sulfamate carbonic anhydrase IX inhibitors in breast carcinoma xenografts. J. Med. Chem. 55(11), 5591-5600 (2012).