Synthesis and Biological Evaluation of [<sup>18</sup>F]Bicalutamide, 4-[<sup>76</sup>Br]Bromobicalutamide, and 4-[<sup>76</sup>Br]Bromo-thiobicalutamide as Non-Steroidal Androgens for Prostate Cancer Imaging
作者:Ephraim E. Parent、Carmen S. Dence、Carl Jenks、Terry L. Sharp、Michael J. Welch、John A. Katzenellenbogen
DOI:10.1021/jm060847r
日期:2007.3.1
Androgen receptors (AR) are overexpressed in most primary and metastatic prostate cancers. To develop a nonsteroidal AR-mediated imaging agent, we synthesized and radiolabeled several analogs of the potent antiandrogen bicalutamide: [18F]bicalutamide, 4-[76Br]bromobicalutamide, and [76Br]bromo-thiobicalutamide. Two of these analogs, 4-[76Br]bromobicalutamide and [76Br]bromo-thiobicalutamide, were found
雄激素受体(AR)在大多数原发性和转移性前列腺癌中过表达。为了开发非甾体类AR介导的成像剂,我们合成了几种有效的抗雄激素比卡鲁胺类似物,并对其进行了放射性标记:[18F]比卡鲁胺,4- [76Br]溴比鲁胺和[76Br]溴-硫代比鲁胺。发现这些类似物中的两种,与比卡鲁胺相比,对4-雄激素受体和对雄激素受体(AR)的亲和力显着提高,4- [76Br]溴比阿鲁胺和[76Br]溴-硫代比阿鲁胺。[18 F]比卡鲁胺的合成利用伪载体方法来实现将示踪剂水平的放射性标记前体产生的碳负离子加到未标记的羰基前体上。通过三丁基锡烷前体的亲电溴化标记了4- [76Br]溴比邻氨基苯甲酰胺和[76Br]溴-硫代比邻氨基苯甲酰胺。前者可以高比活度制备,其组织分布已在体内进行了测试。去势成年雄性大鼠中雄激素靶组织的摄取很明显。然而,在经DES处理,AR阳性,荷瘤的雄性小鼠中,肿瘤的吸收率很低。