Synthesis and SAR of Novel Re/<sup>99m</sup>Tc-Labeled Benzenesulfonamide Carbonic Anhydrase IX Inhibitors for Molecular Imaging of Tumor Hypoxia
作者:Genliang Lu、Shawn M. Hillier、Kevin P. Maresca、Craig N. Zimmerman、William C. Eckelman、John L. Joyal、John W. Babich
DOI:10.1021/jm3015348
日期:2013.1.24
Carbonic anhydrase IX (CA-IX) is upregulated in cancer in response to the hypoxic tumor microenvironment, making it an attractive molecular target for the detection of hypoxic solid tumors. A series of small molecule benzenesulfonamide based CA-IX inhibitors containing novel tridentate chelates complexed with the M(CO)3 core (M = Re or 99mTc) were designed and synthesized. The in vitro binding affinity
碳酸酐酶IX(CA-IX)在缺氧肿瘤微环境中被上调,使其成为检测缺氧实体瘤的诱人分子靶标。设计并合成了一系列基于小分子苯磺酰胺的CA-IX抑制剂,其中含有与M(CO)3核(M = Re或99m Tc)络合的新型三齿螯合物。苯磺酰胺rh络合物的体外结合亲和力在表达缺氧的CA-IX的HeLa细胞中产生的IC 50值为3至116 nM。最有效的化合物之一3d(IC 50 = 9 nM)用三羰基tech( 99m Tc(CO)3 } +),以优异的收率和高纯度提供 99m Tc(CO)3 } +配合物。99m Tc(CO)3 – 3d与表达CA-IX的低氧HeLa细胞特异性结合。这项工作导致鉴定出一系列有希望的高亲和力 99m Tc(CO)3 } +放射性标记的CA-IX抑制剂,这些抑制剂可能显着影响低氧性实体瘤的诊断,分期和治疗选择。