Synthesis of 2-[11C]methoxy-3,17β-O,O-bis(sulfamoyl)estradiol as a new potential PET agent for imaging of steroid sulfatase (STS) in cancers
作者:Min Wang、Lu Xu、Mingzhang Gao、Kathy D. Miller、George W. Sledge、Qi-Huang Zheng
DOI:10.1016/j.steroids.2012.04.007
日期:2012.7
design and synthesis of 2-[(11)C]methoxy-3,17β-O,O-bis(sulfamoyl)estradiol ([(11)C]5) as a new potential imaging agent for biomedical imaging technique positron emission tomography (PET) to image STS in cancers. The authentic standard 5 was synthesized from 17β-estradiol by published procedures in 5 steps with 40% overall chemical yield. The precursor 2-hydroxy-3,17β-O,O-bis(sulfamoyl)estradiol (14a) for
类固醇硫酸酯酶 (STS) 催化类固醇硫酸盐水解为雌酮,雌酮是肿瘤中雌激素的主要来源。碳酸酐酶 II (CAII) 通过氨基磺酸部分的单阴离子形式与酶活性位点中的锌原子配位而在红细胞中高表达,并且 CAII 在多种肿瘤中高表达。2-Methoxy-3,17β-O,O-双(氨磺酰基)雌二醇 (5) 是一种双功能 STS-CAII 抑制剂,可选择性地抑制 STS,其 IC(50) 值为 39 nMIC(50),而 CAII 值为 379 nMIC(50) . 该化合物在 NCI 60 细胞系面板中表现出强大的抗增殖活性,平均图中点值为 87 nM,在早期 Lewis 肺模型中也具有体外和体内抗血管生成活性。该化合物最近已被开发为多靶点抗癌剂。STS 和 CAII 在癌症中都过表达,并已成为癌症治疗和癌症分子成像的有吸引力的靶标。在这里,我们报告了 2-[(11)C] 甲氧基-3,17β-O,O