Synthesis and Evaluation of 4-Halogeno-<i>N</i>-[4-[6-(isopropylamino)pyrimidin-4-yl]-1,3-thiazol-2-yl]-<i>N</i>-[<sup>11</sup>C]methylbenzamide for Imaging of Metabotropic Glutamate 1 Receptor in Melanoma
作者:Masayuki Fujinaga、Lin Xie、Tomoteru Yamasaki、Joji Yui、Yoko Shimoda、Akiko Hatori、Katsushi Kumata、Yiding Zhang、Nobuki Nengaki、Kazunori Kawamura、Ming-Rong Zhang
DOI:10.1021/jm501845n
日期:2015.2.12
Metabotropic glutamate 1 (mGlu1) receptor is found not only in the brain but also in melanomas and breast cancers. mGlu1 is a promising target for molecular imaging-based diagnosis and treatment of melanoma because its overexpression induces melanocyte carcinogenesis. Here we developed three PET tracers: 4-halogeno-N-[4-[6-(isopropylamino)pyrimidin-4-yl]-1,3-thiazol- 2-yl]-N-[11C]methylbenzamide ([11C]4–6)
代谢型谷氨酸1(mGlu1)受体不仅存在于大脑中,而且还存在于黑色素瘤和乳腺癌中。mGlu1是基于分子影像学的黑色素瘤诊断和治疗的有希望的靶标,因为它的过度表达会诱导黑色素细胞癌变。在这里,我们开发了三种PET示踪剂:4-卤代-N- [4- [6-(异丙基氨基)嘧啶-4-基] -1,3-噻唑-2-基] -N- [ 11 C]甲基苯甲酰胺([ 11 C] 4 – 6),在目标肿瘤中表现出较高的摄取,在非目标脑组织中表现出减少的摄取。体外结合试验表明结合亲和力为4 – 6(K i(22–143 nM)用于mGlu1受体。在植入了B16F10黑色素瘤细胞的小鼠中进行的体内生物分布研究证实,肿瘤中放射性的摄取较高,而血液,皮肤和肌肉的摄取较低。使用mGlu1选择性配体抑制mGlu1受体导致肿瘤中放射性吸收的减少。[ 11 C] 6在肿瘤和非靶组织之间显示出最高的摄取率,可能被证明可作为黑色素瘤中mGlu1成像的PET示踪剂。